shithub: libvpx

--- a/test/fdct4x4_test.cc

+++ b/test/fdct4x4_test.cc

@@ -487,19 +487,11 @@

         make_tuple(&vp9_fht4x4_c, &vp9_iht4x4_16_add_neon, 3, VPX_BITS_8)));

 #endif  // HAVE_NEON && !CONFIG_VP9_HIGHBITDEPTH && !CONFIG_EMULATE_HARDWARE

-#if CONFIG_USE_X86INC && HAVE_MMX && !CONFIG_VP9_HIGHBITDEPTH && \

-    !CONFIG_EMULATE_HARDWARE

+#if CONFIG_USE_X86INC && HAVE_SSE2 && !CONFIG_EMULATE_HARDWARE

 INSTANTIATE_TEST_CASE_P(

-    MMX, Trans4x4WHT,

-    ::testing::Values(

-        make_tuple(&vp9_fwht4x4_mmx, &vpx_iwht4x4_16_add_c, 0, VPX_BITS_8)));

-#endif

-#if CONFIG_USE_X86INC && HAVE_SSE2 && !CONFIG_VP9_HIGHBITDEPTH && \

-    !CONFIG_EMULATE_HARDWARE

-INSTANTIATE_TEST_CASE_P(

     SSE2, Trans4x4WHT,

     ::testing::Values(

+        make_tuple(&vp9_fwht4x4_sse2, &vpx_iwht4x4_16_add_c, 0, VPX_BITS_8),

         make_tuple(&vp9_fwht4x4_c, &vpx_iwht4x4_16_add_sse2, 0, VPX_BITS_8)));

 #endif

--- a/vp10/common/vp10_rtcd_defs.pl

+++ b/vp10/common/vp10_rtcd_defs.pl

@@ -398,7 +398,7 @@

   specialize qw/vp10_fht16x16 sse2/;

   add_proto qw/void vp10_fwht4x4/, "const int16_t *input, tran_low_t *output, int stride";

-  specialize qw/vp10_fwht4x4/, "$mmx_x86inc";

+  specialize qw/vp10_fwht4x4/, "$sse2_x86inc";

 } else {

   add_proto qw/void vp10_fht4x4/, "const int16_t *input, tran_low_t *output, int stride, int tx_type";

   specialize qw/vp10_fht4x4 sse2 msa/;

@@ -410,7 +410,7 @@

   specialize qw/vp10_fht16x16 sse2 msa/;

   add_proto qw/void vp10_fwht4x4/, "const int16_t *input, tran_low_t *output, int stride";

-  specialize qw/vp10_fwht4x4 msa/, "$mmx_x86inc";

+  specialize qw/vp10_fwht4x4 msa/, "$sse2_x86inc";

 # Inverse transform

--- /dev/null

+++ b/vp10/encoder/x86/dct_intrin_sse2.c

@@ -1,0 +1,2058 @@

+/*

+ *  Copyright (c) 2012 The WebM project authors. All Rights Reserved.

+ *

+ *  Use of this source code is governed by a BSD-style license

+ *  that can be found in the LICENSE file in the root of the source

+ *  tree. An additional intellectual property rights grant can be found

+ *  in the file PATENTS.  All contributing project authors may

+ *  be found in the AUTHORS file in the root of the source tree.

+ */

+#include <assert.h>

+#include <emmintrin.h>  // SSE2

+#include "./vp10_rtcd.h"

+#include "./vpx_dsp_rtcd.h"

+#include "vpx_dsp/txfm_common.h"

+#include "vpx_dsp/x86/fwd_txfm_sse2.h"

+#include "vpx_dsp/x86/txfm_common_sse2.h"

+#include "vpx_ports/mem.h"

+static INLINE void load_buffer_4x4(const int16_t *input, __m128i *in,

+                                   int stride) {

+  const __m128i k__nonzero_bias_a = _mm_setr_epi16(0, 1, 1, 1, 1, 1, 1, 1);

+  const __m128i k__nonzero_bias_b = _mm_setr_epi16(1, 0, 0, 0, 0, 0, 0, 0);

+  __m128i mask;

+  in[0] = _mm_loadl_epi64((const __m128i *)(input + 0 * stride));

+  in[1] = _mm_loadl_epi64((const __m128i *)(input + 1 * stride));

+  in[2] = _mm_loadl_epi64((const __m128i *)(input + 2 * stride));

+  in[3] = _mm_loadl_epi64((const __m128i *)(input + 3 * stride));

+  in[0] = _mm_slli_epi16(in[0], 4);

+  in[1] = _mm_slli_epi16(in[1], 4);

+  in[2] = _mm_slli_epi16(in[2], 4);

+  in[3] = _mm_slli_epi16(in[3], 4);

+  mask = _mm_cmpeq_epi16(in[0], k__nonzero_bias_a);

+  in[0] = _mm_add_epi16(in[0], mask);

+  in[0] = _mm_add_epi16(in[0], k__nonzero_bias_b);

+}

+static INLINE void write_buffer_4x4(tran_low_t *output, __m128i *res) {

+  const __m128i kOne = _mm_set1_epi16(1);

+  __m128i in01 = _mm_unpacklo_epi64(res[0], res[1]);

+  __m128i in23 = _mm_unpacklo_epi64(res[2], res[3]);

+  __m128i out01 = _mm_add_epi16(in01, kOne);

+  __m128i out23 = _mm_add_epi16(in23, kOne);

+  out01 = _mm_srai_epi16(out01, 2);

+  out23 = _mm_srai_epi16(out23, 2);

+  store_output(&out01, (output + 0 * 8));

+  store_output(&out23, (output + 1 * 8));

+}

+static INLINE void transpose_4x4(__m128i *res) {

+  // Combine and transpose

+  // 00 01 02 03 20 21 22 23

+  // 10 11 12 13 30 31 32 33

+  const __m128i tr0_0 = _mm_unpacklo_epi16(res[0], res[1]);

+  const __m128i tr0_1 = _mm_unpackhi_epi16(res[0], res[1]);

+  // 00 10 01 11 02 12 03 13

+  // 20 30 21 31 22 32 23 33

+  res[0] = _mm_unpacklo_epi32(tr0_0, tr0_1);

+  res[2] = _mm_unpackhi_epi32(tr0_0, tr0_1);

+  // 00 10 20 30 01 11 21 31

+  // 02 12 22 32 03 13 23 33

+  // only use the first 4 16-bit integers

+  res[1] = _mm_unpackhi_epi64(res[0], res[0]);

+  res[3] = _mm_unpackhi_epi64(res[2], res[2]);

+}

+static void fdct4_sse2(__m128i *in) {

+  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

+  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

+  const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);

+  const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);

+  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

+  __m128i u[4], v[4];

+  u[0]=_mm_unpacklo_epi16(in[0], in[1]);

+  u[1]=_mm_unpacklo_epi16(in[3], in[2]);

+  v[0] = _mm_add_epi16(u[0], u[1]);

+  v[1] = _mm_sub_epi16(u[0], u[1]);

+  u[0] = _mm_madd_epi16(v[0], k__cospi_p16_p16);  // 0

+  u[1] = _mm_madd_epi16(v[0], k__cospi_p16_m16);  // 2

+  u[2] = _mm_madd_epi16(v[1], k__cospi_p08_p24);  // 1

+  u[3] = _mm_madd_epi16(v[1], k__cospi_p24_m08);  // 3

+  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

+  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

+  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

+  v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

+  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

+  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

+  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

+  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);

+  in[0] = _mm_packs_epi32(u[0], u[1]);

+  in[1] = _mm_packs_epi32(u[2], u[3]);

+  transpose_4x4(in);

+}

+static void fadst4_sse2(__m128i *in) {

+  const __m128i k__sinpi_p01_p02 = pair_set_epi16(sinpi_1_9, sinpi_2_9);

+  const __m128i k__sinpi_p04_m01 = pair_set_epi16(sinpi_4_9, -sinpi_1_9);

+  const __m128i k__sinpi_p03_p04 = pair_set_epi16(sinpi_3_9, sinpi_4_9);

+  const __m128i k__sinpi_m03_p02 = pair_set_epi16(-sinpi_3_9, sinpi_2_9);

+  const __m128i k__sinpi_p03_p03 = _mm_set1_epi16((int16_t)sinpi_3_9);

+  const __m128i kZero = _mm_set1_epi16(0);

+  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

+  __m128i u[8], v[8];

+  __m128i in7 = _mm_add_epi16(in[0], in[1]);

+  u[0] = _mm_unpacklo_epi16(in[0], in[1]);

+  u[1] = _mm_unpacklo_epi16(in[2], in[3]);

+  u[2] = _mm_unpacklo_epi16(in7, kZero);

+  u[3] = _mm_unpacklo_epi16(in[2], kZero);

+  u[4] = _mm_unpacklo_epi16(in[3], kZero);

+  v[0] = _mm_madd_epi16(u[0], k__sinpi_p01_p02);  // s0 + s2

+  v[1] = _mm_madd_epi16(u[1], k__sinpi_p03_p04);  // s4 + s5

+  v[2] = _mm_madd_epi16(u[2], k__sinpi_p03_p03);  // x1

+  v[3] = _mm_madd_epi16(u[0], k__sinpi_p04_m01);  // s1 - s3

+  v[4] = _mm_madd_epi16(u[1], k__sinpi_m03_p02);  // -s4 + s6

+  v[5] = _mm_madd_epi16(u[3], k__sinpi_p03_p03);  // s4

+  v[6] = _mm_madd_epi16(u[4], k__sinpi_p03_p03);

+  u[0] = _mm_add_epi32(v[0], v[1]);

+  u[1] = _mm_sub_epi32(v[2], v[6]);

+  u[2] = _mm_add_epi32(v[3], v[4]);

+  u[3] = _mm_sub_epi32(u[2], u[0]);

+  u[4] = _mm_slli_epi32(v[5], 2);

+  u[5] = _mm_sub_epi32(u[4], v[5]);

+  u[6] = _mm_add_epi32(u[3], u[5]);

+  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

+  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

+  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

+  v[3] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);

+  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

+  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

+  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

+  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);

+  in[0] = _mm_packs_epi32(u[0], u[2]);

+  in[1] = _mm_packs_epi32(u[1], u[3]);

+  transpose_4x4(in);

+}

+void vp10_fht4x4_sse2(const int16_t *input, tran_low_t *output,

+                     int stride, int tx_type) {

+  __m128i in[4];

+  switch (tx_type) {

+    case DCT_DCT:

+      vpx_fdct4x4_sse2(input, output, stride);

+      break;

+    case ADST_DCT:

+      load_buffer_4x4(input, in, stride);

+      fadst4_sse2(in);

+      fdct4_sse2(in);

+      write_buffer_4x4(output, in);

+      break;

+    case DCT_ADST:

+      load_buffer_4x4(input, in, stride);

+      fdct4_sse2(in);

+      fadst4_sse2(in);

+      write_buffer_4x4(output, in);

+      break;

+    case ADST_ADST:

+      load_buffer_4x4(input, in, stride);

+      fadst4_sse2(in);

+      fadst4_sse2(in);

+      write_buffer_4x4(output, in);

+      break;

+   default:

+     assert(0);

+     break;

+  }

+}

+void vp10_fdct8x8_quant_sse2(const int16_t *input, int stride,

+                            int16_t* coeff_ptr, intptr_t n_coeffs,

+                            int skip_block, const int16_t* zbin_ptr,

+                            const int16_t* round_ptr, const int16_t* quant_ptr,

+                            const int16_t* quant_shift_ptr, int16_t* qcoeff_ptr,

+                            int16_t* dqcoeff_ptr, const int16_t* dequant_ptr,

+                            uint16_t* eob_ptr,

+                            const int16_t* scan_ptr,

+                            const int16_t* iscan_ptr) {

+  __m128i zero;

+  int pass;

+  // Constants

+  //    When we use them, in one case, they are all the same. In all others

+  //    it's a pair of them that we need to repeat four times. This is done

+  //    by constructing the 32 bit constant corresponding to that pair.

+  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

+  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

+  const __m128i k__cospi_p24_p08 = pair_set_epi16(cospi_24_64, cospi_8_64);

+  const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64, cospi_24_64);

+  const __m128i k__cospi_p28_p04 = pair_set_epi16(cospi_28_64, cospi_4_64);

+  const __m128i k__cospi_m04_p28 = pair_set_epi16(-cospi_4_64, cospi_28_64);

+  const __m128i k__cospi_p12_p20 = pair_set_epi16(cospi_12_64, cospi_20_64);

+  const __m128i k__cospi_m20_p12 = pair_set_epi16(-cospi_20_64, cospi_12_64);

+  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

+  // Load input

+  __m128i in0  = _mm_load_si128((const __m128i *)(input + 0 * stride));

+  __m128i in1  = _mm_load_si128((const __m128i *)(input + 1 * stride));

+  __m128i in2  = _mm_load_si128((const __m128i *)(input + 2 * stride));

+  __m128i in3  = _mm_load_si128((const __m128i *)(input + 3 * stride));

+  __m128i in4  = _mm_load_si128((const __m128i *)(input + 4 * stride));

+  __m128i in5  = _mm_load_si128((const __m128i *)(input + 5 * stride));

+  __m128i in6  = _mm_load_si128((const __m128i *)(input + 6 * stride));

+  __m128i in7  = _mm_load_si128((const __m128i *)(input + 7 * stride));

+  __m128i *in[8];

+  int index = 0;

+  (void)scan_ptr;

+  (void)zbin_ptr;

+  (void)quant_shift_ptr;

+  (void)coeff_ptr;

+  // Pre-condition input (shift by two)

+  in0 = _mm_slli_epi16(in0, 2);

+  in1 = _mm_slli_epi16(in1, 2);

+  in2 = _mm_slli_epi16(in2, 2);

+  in3 = _mm_slli_epi16(in3, 2);

+  in4 = _mm_slli_epi16(in4, 2);

+  in5 = _mm_slli_epi16(in5, 2);

+  in6 = _mm_slli_epi16(in6, 2);

+  in7 = _mm_slli_epi16(in7, 2);

+  in[0] = &in0;

+  in[1] = &in1;

+  in[2] = &in2;

+  in[3] = &in3;

+  in[4] = &in4;

+  in[5] = &in5;

+  in[6] = &in6;

+  in[7] = &in7;

+  // We do two passes, first the columns, then the rows. The results of the

+  // first pass are transposed so that the same column code can be reused. The

+  // results of the second pass are also transposed so that the rows (processed

+  // as columns) are put back in row positions.

+  for (pass = 0; pass < 2; pass++) {

+    // To store results of each pass before the transpose.

+    __m128i res0, res1, res2, res3, res4, res5, res6, res7;

+    // Add/subtract

+    const __m128i q0 = _mm_add_epi16(in0, in7);

+    const __m128i q1 = _mm_add_epi16(in1, in6);

+    const __m128i q2 = _mm_add_epi16(in2, in5);

+    const __m128i q3 = _mm_add_epi16(in3, in4);

+    const __m128i q4 = _mm_sub_epi16(in3, in4);

+    const __m128i q5 = _mm_sub_epi16(in2, in5);

+    const __m128i q6 = _mm_sub_epi16(in1, in6);

+    const __m128i q7 = _mm_sub_epi16(in0, in7);

+    // Work on first four results

+    {

+      // Add/subtract

+      const __m128i r0 = _mm_add_epi16(q0, q3);

+      const __m128i r1 = _mm_add_epi16(q1, q2);

+      const __m128i r2 = _mm_sub_epi16(q1, q2);

+      const __m128i r3 = _mm_sub_epi16(q0, q3);

+      // Interleave to do the multiply by constants which gets us into 32bits

+      const __m128i t0 = _mm_unpacklo_epi16(r0, r1);

+      const __m128i t1 = _mm_unpackhi_epi16(r0, r1);

+      const __m128i t2 = _mm_unpacklo_epi16(r2, r3);

+      const __m128i t3 = _mm_unpackhi_epi16(r2, r3);

+      const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p16_p16);

+      const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p16_p16);

+      const __m128i u2 = _mm_madd_epi16(t0, k__cospi_p16_m16);

+      const __m128i u3 = _mm_madd_epi16(t1, k__cospi_p16_m16);

+      const __m128i u4 = _mm_madd_epi16(t2, k__cospi_p24_p08);

+      const __m128i u5 = _mm_madd_epi16(t3, k__cospi_p24_p08);

+      const __m128i u6 = _mm_madd_epi16(t2, k__cospi_m08_p24);

+      const __m128i u7 = _mm_madd_epi16(t3, k__cospi_m08_p24);

+      // dct_const_round_shift

+      const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);

+      const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);

+      const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);

+      const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);

+      const __m128i v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);

+      const __m128i v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING);

+      const __m128i v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);

+      const __m128i v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING);

+      const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

+      const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

+      const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

+      const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

+      const __m128i w4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

+      const __m128i w5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

+      const __m128i w6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

+      const __m128i w7 = _mm_srai_epi32(v7, DCT_CONST_BITS);

+      // Combine

+      res0 = _mm_packs_epi32(w0, w1);

+      res4 = _mm_packs_epi32(w2, w3);

+      res2 = _mm_packs_epi32(w4, w5);

+      res6 = _mm_packs_epi32(w6, w7);

+    }

+    // Work on next four results

+    {

+      // Interleave to do the multiply by constants which gets us into 32bits

+      const __m128i d0 = _mm_unpacklo_epi16(q6, q5);

+      const __m128i d1 = _mm_unpackhi_epi16(q6, q5);

+      const __m128i e0 = _mm_madd_epi16(d0, k__cospi_p16_m16);

+      const __m128i e1 = _mm_madd_epi16(d1, k__cospi_p16_m16);

+      const __m128i e2 = _mm_madd_epi16(d0, k__cospi_p16_p16);

+      const __m128i e3 = _mm_madd_epi16(d1, k__cospi_p16_p16);

+      // dct_const_round_shift

+      const __m128i f0 = _mm_add_epi32(e0, k__DCT_CONST_ROUNDING);

+      const __m128i f1 = _mm_add_epi32(e1, k__DCT_CONST_ROUNDING);

+      const __m128i f2 = _mm_add_epi32(e2, k__DCT_CONST_ROUNDING);

+      const __m128i f3 = _mm_add_epi32(e3, k__DCT_CONST_ROUNDING);

+      const __m128i s0 = _mm_srai_epi32(f0, DCT_CONST_BITS);

+      const __m128i s1 = _mm_srai_epi32(f1, DCT_CONST_BITS);

+      const __m128i s2 = _mm_srai_epi32(f2, DCT_CONST_BITS);

+      const __m128i s3 = _mm_srai_epi32(f3, DCT_CONST_BITS);

+      // Combine

+      const __m128i r0 = _mm_packs_epi32(s0, s1);

+      const __m128i r1 = _mm_packs_epi32(s2, s3);

+      // Add/subtract

+      const __m128i x0 = _mm_add_epi16(q4, r0);

+      const __m128i x1 = _mm_sub_epi16(q4, r0);

+      const __m128i x2 = _mm_sub_epi16(q7, r1);

+      const __m128i x3 = _mm_add_epi16(q7, r1);

+      // Interleave to do the multiply by constants which gets us into 32bits

+      const __m128i t0 = _mm_unpacklo_epi16(x0, x3);

+      const __m128i t1 = _mm_unpackhi_epi16(x0, x3);

+      const __m128i t2 = _mm_unpacklo_epi16(x1, x2);

+      const __m128i t3 = _mm_unpackhi_epi16(x1, x2);

+      const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p28_p04);

+      const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p28_p04);

+      const __m128i u2 = _mm_madd_epi16(t0, k__cospi_m04_p28);

+      const __m128i u3 = _mm_madd_epi16(t1, k__cospi_m04_p28);

+      const __m128i u4 = _mm_madd_epi16(t2, k__cospi_p12_p20);

+      const __m128i u5 = _mm_madd_epi16(t3, k__cospi_p12_p20);

+      const __m128i u6 = _mm_madd_epi16(t2, k__cospi_m20_p12);

+      const __m128i u7 = _mm_madd_epi16(t3, k__cospi_m20_p12);

+      // dct_const_round_shift

+      const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);

+      const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);

+      const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);

+      const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);

+      const __m128i v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);

+      const __m128i v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING);

+      const __m128i v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);

+      const __m128i v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING);

+      const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

+      const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

+      const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

+      const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

+      const __m128i w4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

+      const __m128i w5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

+      const __m128i w6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

+      const __m128i w7 = _mm_srai_epi32(v7, DCT_CONST_BITS);

+      // Combine

+      res1 = _mm_packs_epi32(w0, w1);

+      res7 = _mm_packs_epi32(w2, w3);

+      res5 = _mm_packs_epi32(w4, w5);

+      res3 = _mm_packs_epi32(w6, w7);

+    }

+    // Transpose the 8x8.

+    {

+      // 00 01 02 03 04 05 06 07

+      // 10 11 12 13 14 15 16 17

+      // 20 21 22 23 24 25 26 27

+      // 30 31 32 33 34 35 36 37

+      // 40 41 42 43 44 45 46 47

+      // 50 51 52 53 54 55 56 57

+      // 60 61 62 63 64 65 66 67

+      // 70 71 72 73 74 75 76 77

+      const __m128i tr0_0 = _mm_unpacklo_epi16(res0, res1);

+      const __m128i tr0_1 = _mm_unpacklo_epi16(res2, res3);

+      const __m128i tr0_2 = _mm_unpackhi_epi16(res0, res1);

+      const __m128i tr0_3 = _mm_unpackhi_epi16(res2, res3);

+      const __m128i tr0_4 = _mm_unpacklo_epi16(res4, res5);

+      const __m128i tr0_5 = _mm_unpacklo_epi16(res6, res7);

+      const __m128i tr0_6 = _mm_unpackhi_epi16(res4, res5);

+      const __m128i tr0_7 = _mm_unpackhi_epi16(res6, res7);

+      // 00 10 01 11 02 12 03 13

+      // 20 30 21 31 22 32 23 33

+      // 04 14 05 15 06 16 07 17

+      // 24 34 25 35 26 36 27 37

+      // 40 50 41 51 42 52 43 53

+      // 60 70 61 71 62 72 63 73

+      // 54 54 55 55 56 56 57 57

+      // 64 74 65 75 66 76 67 77

+      const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1);

+      const __m128i tr1_1 = _mm_unpacklo_epi32(tr0_2, tr0_3);

+      const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1);

+      const __m128i tr1_3 = _mm_unpackhi_epi32(tr0_2, tr0_3);

+      const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_4, tr0_5);

+      const __m128i tr1_5 = _mm_unpacklo_epi32(tr0_6, tr0_7);

+      const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_4, tr0_5);

+      const __m128i tr1_7 = _mm_unpackhi_epi32(tr0_6, tr0_7);

+      // 00 10 20 30 01 11 21 31

+      // 40 50 60 70 41 51 61 71

+      // 02 12 22 32 03 13 23 33

+      // 42 52 62 72 43 53 63 73

+      // 04 14 24 34 05 15 21 36

+      // 44 54 64 74 45 55 61 76

+      // 06 16 26 36 07 17 27 37

+      // 46 56 66 76 47 57 67 77

+      in0 = _mm_unpacklo_epi64(tr1_0, tr1_4);

+      in1 = _mm_unpackhi_epi64(tr1_0, tr1_4);

+      in2 = _mm_unpacklo_epi64(tr1_2, tr1_6);

+      in3 = _mm_unpackhi_epi64(tr1_2, tr1_6);

+      in4 = _mm_unpacklo_epi64(tr1_1, tr1_5);

+      in5 = _mm_unpackhi_epi64(tr1_1, tr1_5);

+      in6 = _mm_unpacklo_epi64(tr1_3, tr1_7);

+      in7 = _mm_unpackhi_epi64(tr1_3, tr1_7);

+      // 00 10 20 30 40 50 60 70

+      // 01 11 21 31 41 51 61 71

+      // 02 12 22 32 42 52 62 72

+      // 03 13 23 33 43 53 63 73

+      // 04 14 24 34 44 54 64 74

+      // 05 15 25 35 45 55 65 75

+      // 06 16 26 36 46 56 66 76

+      // 07 17 27 37 47 57 67 77

+    }

+  }

+  // Post-condition output and store it

+  {

+    // Post-condition (division by two)

+    //    division of two 16 bits signed numbers using shifts

+    //    n / 2 = (n - (n >> 15)) >> 1

+    const __m128i sign_in0 = _mm_srai_epi16(in0, 15);

+    const __m128i sign_in1 = _mm_srai_epi16(in1, 15);

+    const __m128i sign_in2 = _mm_srai_epi16(in2, 15);

+    const __m128i sign_in3 = _mm_srai_epi16(in3, 15);

+    const __m128i sign_in4 = _mm_srai_epi16(in4, 15);

+    const __m128i sign_in5 = _mm_srai_epi16(in5, 15);

+    const __m128i sign_in6 = _mm_srai_epi16(in6, 15);

+    const __m128i sign_in7 = _mm_srai_epi16(in7, 15);

+    in0 = _mm_sub_epi16(in0, sign_in0);

+    in1 = _mm_sub_epi16(in1, sign_in1);

+    in2 = _mm_sub_epi16(in2, sign_in2);

+    in3 = _mm_sub_epi16(in3, sign_in3);

+    in4 = _mm_sub_epi16(in4, sign_in4);

+    in5 = _mm_sub_epi16(in5, sign_in5);

+    in6 = _mm_sub_epi16(in6, sign_in6);

+    in7 = _mm_sub_epi16(in7, sign_in7);

+    in0 = _mm_srai_epi16(in0, 1);

+    in1 = _mm_srai_epi16(in1, 1);

+    in2 = _mm_srai_epi16(in2, 1);

+    in3 = _mm_srai_epi16(in3, 1);

+    in4 = _mm_srai_epi16(in4, 1);

+    in5 = _mm_srai_epi16(in5, 1);

+    in6 = _mm_srai_epi16(in6, 1);

+    in7 = _mm_srai_epi16(in7, 1);

+  }

+  iscan_ptr += n_coeffs;

+  qcoeff_ptr += n_coeffs;

+  dqcoeff_ptr += n_coeffs;

+  n_coeffs = -n_coeffs;

+  zero = _mm_setzero_si128();

+  if (!skip_block) {

+    __m128i eob;

+    __m128i round, quant, dequant;

+    {

+      __m128i coeff0, coeff1;

+      // Setup global values

+      {

+        round = _mm_load_si128((const __m128i*)round_ptr);

+        quant = _mm_load_si128((const __m128i*)quant_ptr);

+        dequant = _mm_load_si128((const __m128i*)dequant_ptr);

+      }

+      {

+        __m128i coeff0_sign, coeff1_sign;

+        __m128i qcoeff0, qcoeff1;

+        __m128i qtmp0, qtmp1;

+        // Do DC and first 15 AC

+        coeff0 = *in[0];

+        coeff1 = *in[1];

+        // Poor man's sign extract

+        coeff0_sign = _mm_srai_epi16(coeff0, 15);

+        coeff1_sign = _mm_srai_epi16(coeff1, 15);

+        qcoeff0 = _mm_xor_si128(coeff0, coeff0_sign);

+        qcoeff1 = _mm_xor_si128(coeff1, coeff1_sign);

+        qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);

+        qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);

+        qcoeff0 = _mm_adds_epi16(qcoeff0, round);

+        round = _mm_unpackhi_epi64(round, round);

+        qcoeff1 = _mm_adds_epi16(qcoeff1, round);

+        qtmp0 = _mm_mulhi_epi16(qcoeff0, quant);

+        quant = _mm_unpackhi_epi64(quant, quant);

+        qtmp1 = _mm_mulhi_epi16(qcoeff1, quant);

+        // Reinsert signs

+        qcoeff0 = _mm_xor_si128(qtmp0, coeff0_sign);

+        qcoeff1 = _mm_xor_si128(qtmp1, coeff1_sign);

+        qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);

+        qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);

+        _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), qcoeff0);

+        _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, qcoeff1);

+        coeff0 = _mm_mullo_epi16(qcoeff0, dequant);

+        dequant = _mm_unpackhi_epi64(dequant, dequant);

+        coeff1 = _mm_mullo_epi16(qcoeff1, dequant);

+        _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), coeff0);

+        _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, coeff1);

+      }

+      {

+        // Scan for eob

+        __m128i zero_coeff0, zero_coeff1;

+        __m128i nzero_coeff0, nzero_coeff1;

+        __m128i iscan0, iscan1;

+        __m128i eob1;

+        zero_coeff0 = _mm_cmpeq_epi16(coeff0, zero);

+        zero_coeff1 = _mm_cmpeq_epi16(coeff1, zero);

+        nzero_coeff0 = _mm_cmpeq_epi16(zero_coeff0, zero);

+        nzero_coeff1 = _mm_cmpeq_epi16(zero_coeff1, zero);

+        iscan0 = _mm_load_si128((const __m128i*)(iscan_ptr + n_coeffs));

+        iscan1 = _mm_load_si128((const __m128i*)(iscan_ptr + n_coeffs) + 1);

+        // Add one to convert from indices to counts

+        iscan0 = _mm_sub_epi16(iscan0, nzero_coeff0);

+        iscan1 = _mm_sub_epi16(iscan1, nzero_coeff1);

+        eob = _mm_and_si128(iscan0, nzero_coeff0);

+        eob1 = _mm_and_si128(iscan1, nzero_coeff1);

+        eob = _mm_max_epi16(eob, eob1);

+      }

+      n_coeffs += 8 * 2;

+    }

+    // AC only loop

+    index = 2;

+    while (n_coeffs < 0) {

+      __m128i coeff0, coeff1;

+      {

+        __m128i coeff0_sign, coeff1_sign;

+        __m128i qcoeff0, qcoeff1;

+        __m128i qtmp0, qtmp1;

+        assert(index < (int)(sizeof(in) / sizeof(in[0])) - 1);

+        coeff0 = *in[index];

+        coeff1 = *in[index + 1];

+        // Poor man's sign extract

+        coeff0_sign = _mm_srai_epi16(coeff0, 15);

+        coeff1_sign = _mm_srai_epi16(coeff1, 15);

+        qcoeff0 = _mm_xor_si128(coeff0, coeff0_sign);

+        qcoeff1 = _mm_xor_si128(coeff1, coeff1_sign);

+        qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);

+        qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);

+        qcoeff0 = _mm_adds_epi16(qcoeff0, round);

+        qcoeff1 = _mm_adds_epi16(qcoeff1, round);

+        qtmp0 = _mm_mulhi_epi16(qcoeff0, quant);

+        qtmp1 = _mm_mulhi_epi16(qcoeff1, quant);

+        // Reinsert signs

+        qcoeff0 = _mm_xor_si128(qtmp0, coeff0_sign);

+        qcoeff1 = _mm_xor_si128(qtmp1, coeff1_sign);

+        qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);

+        qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);

+        _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), qcoeff0);

+        _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, qcoeff1);

+        coeff0 = _mm_mullo_epi16(qcoeff0, dequant);

+        coeff1 = _mm_mullo_epi16(qcoeff1, dequant);

+        _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), coeff0);

+        _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, coeff1);

+      }

+      {

+        // Scan for eob

+        __m128i zero_coeff0, zero_coeff1;

+        __m128i nzero_coeff0, nzero_coeff1;

+        __m128i iscan0, iscan1;

+        __m128i eob0, eob1;

+        zero_coeff0 = _mm_cmpeq_epi16(coeff0, zero);

+        zero_coeff1 = _mm_cmpeq_epi16(coeff1, zero);

+        nzero_coeff0 = _mm_cmpeq_epi16(zero_coeff0, zero);

+        nzero_coeff1 = _mm_cmpeq_epi16(zero_coeff1, zero);

+        iscan0 = _mm_load_si128((const __m128i*)(iscan_ptr + n_coeffs));

+        iscan1 = _mm_load_si128((const __m128i*)(iscan_ptr + n_coeffs) + 1);

+        // Add one to convert from indices to counts

+        iscan0 = _mm_sub_epi16(iscan0, nzero_coeff0);

+        iscan1 = _mm_sub_epi16(iscan1, nzero_coeff1);

+        eob0 = _mm_and_si128(iscan0, nzero_coeff0);

+        eob1 = _mm_and_si128(iscan1, nzero_coeff1);

+        eob0 = _mm_max_epi16(eob0, eob1);

+        eob = _mm_max_epi16(eob, eob0);

+      }

+      n_coeffs += 8 * 2;

+      index += 2;

+    }

+    // Accumulate EOB

+    {

+      __m128i eob_shuffled;

+      eob_shuffled = _mm_shuffle_epi32(eob, 0xe);

+      eob = _mm_max_epi16(eob, eob_shuffled);

+      eob_shuffled = _mm_shufflelo_epi16(eob, 0xe);

+      eob = _mm_max_epi16(eob, eob_shuffled);

+      eob_shuffled = _mm_shufflelo_epi16(eob, 0x1);

+      eob = _mm_max_epi16(eob, eob_shuffled);

+      *eob_ptr = _mm_extract_epi16(eob, 1);

+    }

+  } else {

+    do {

+      _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), zero);

+      _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, zero);

+      _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), zero);

+      _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, zero);

+      n_coeffs += 8 * 2;

+    } while (n_coeffs < 0);

+    *eob_ptr = 0;

+  }

+}

+// load 8x8 array

+static INLINE void load_buffer_8x8(const int16_t *input, __m128i *in,

+                                   int stride) {

+  in[0]  = _mm_load_si128((const __m128i *)(input + 0 * stride));

+  in[1]  = _mm_load_si128((const __m128i *)(input + 1 * stride));

+  in[2]  = _mm_load_si128((const __m128i *)(input + 2 * stride));

+  in[3]  = _mm_load_si128((const __m128i *)(input + 3 * stride));

+  in[4]  = _mm_load_si128((const __m128i *)(input + 4 * stride));

+  in[5]  = _mm_load_si128((const __m128i *)(input + 5 * stride));

+  in[6]  = _mm_load_si128((const __m128i *)(input + 6 * stride));

+  in[7]  = _mm_load_si128((const __m128i *)(input + 7 * stride));

+  in[0] = _mm_slli_epi16(in[0], 2);

+  in[1] = _mm_slli_epi16(in[1], 2);

+  in[2] = _mm_slli_epi16(in[2], 2);

+  in[3] = _mm_slli_epi16(in[3], 2);

+  in[4] = _mm_slli_epi16(in[4], 2);

+  in[5] = _mm_slli_epi16(in[5], 2);

+  in[6] = _mm_slli_epi16(in[6], 2);

+  in[7] = _mm_slli_epi16(in[7], 2);

+}

+// right shift and rounding

+static INLINE void right_shift_8x8(__m128i *res, const int bit) {

+  __m128i sign0 = _mm_srai_epi16(res[0], 15);

+  __m128i sign1 = _mm_srai_epi16(res[1], 15);

+  __m128i sign2 = _mm_srai_epi16(res[2], 15);

+  __m128i sign3 = _mm_srai_epi16(res[3], 15);

+  __m128i sign4 = _mm_srai_epi16(res[4], 15);

+  __m128i sign5 = _mm_srai_epi16(res[5], 15);

+  __m128i sign6 = _mm_srai_epi16(res[6], 15);

+  __m128i sign7 = _mm_srai_epi16(res[7], 15);

+  if (bit == 2) {

+    const __m128i const_rounding = _mm_set1_epi16(1);

+    res[0] = _mm_add_epi16(res[0], const_rounding);

+    res[1] = _mm_add_epi16(res[1], const_rounding);

+    res[2] = _mm_add_epi16(res[2], const_rounding);

+    res[3] = _mm_add_epi16(res[3], const_rounding);

+    res[4] = _mm_add_epi16(res[4], const_rounding);

+    res[5] = _mm_add_epi16(res[5], const_rounding);

+    res[6] = _mm_add_epi16(res[6], const_rounding);

+    res[7] = _mm_add_epi16(res[7], const_rounding);

+  }

+  res[0] = _mm_sub_epi16(res[0], sign0);

+  res[1] = _mm_sub_epi16(res[1], sign1);

+  res[2] = _mm_sub_epi16(res[2], sign2);

+  res[3] = _mm_sub_epi16(res[3], sign3);

+  res[4] = _mm_sub_epi16(res[4], sign4);

+  res[5] = _mm_sub_epi16(res[5], sign5);

+  res[6] = _mm_sub_epi16(res[6], sign6);

+  res[7] = _mm_sub_epi16(res[7], sign7);

+  if (bit == 1) {

+    res[0] = _mm_srai_epi16(res[0], 1);

+    res[1] = _mm_srai_epi16(res[1], 1);

+    res[2] = _mm_srai_epi16(res[2], 1);

+    res[3] = _mm_srai_epi16(res[3], 1);

+    res[4] = _mm_srai_epi16(res[4], 1);

+    res[5] = _mm_srai_epi16(res[5], 1);

+    res[6] = _mm_srai_epi16(res[6], 1);

+    res[7] = _mm_srai_epi16(res[7], 1);

+  } else {

+    res[0] = _mm_srai_epi16(res[0], 2);

+    res[1] = _mm_srai_epi16(res[1], 2);

+    res[2] = _mm_srai_epi16(res[2], 2);

+    res[3] = _mm_srai_epi16(res[3], 2);

+    res[4] = _mm_srai_epi16(res[4], 2);

+    res[5] = _mm_srai_epi16(res[5], 2);

+    res[6] = _mm_srai_epi16(res[6], 2);

+    res[7] = _mm_srai_epi16(res[7], 2);

+  }

+}

+// write 8x8 array

+static INLINE void write_buffer_8x8(tran_low_t *output, __m128i *res,

+                                    int stride) {

+  store_output(&res[0], (output + 0 * stride));

+  store_output(&res[1], (output + 1 * stride));

+  store_output(&res[2], (output + 2 * stride));

+  store_output(&res[3], (output + 3 * stride));

+  store_output(&res[4], (output + 4 * stride));

+  store_output(&res[5], (output + 5 * stride));

+  store_output(&res[6], (output + 6 * stride));

+  store_output(&res[7], (output + 7 * stride));

+}

+// perform in-place transpose

+static INLINE void array_transpose_8x8(__m128i *in, __m128i *res) {

+  const __m128i tr0_0 = _mm_unpacklo_epi16(in[0], in[1]);

+  const __m128i tr0_1 = _mm_unpacklo_epi16(in[2], in[3]);

+  const __m128i tr0_2 = _mm_unpackhi_epi16(in[0], in[1]);

+  const __m128i tr0_3 = _mm_unpackhi_epi16(in[2], in[3]);

+  const __m128i tr0_4 = _mm_unpacklo_epi16(in[4], in[5]);

+  const __m128i tr0_5 = _mm_unpacklo_epi16(in[6], in[7]);

+  const __m128i tr0_6 = _mm_unpackhi_epi16(in[4], in[5]);

+  const __m128i tr0_7 = _mm_unpackhi_epi16(in[6], in[7]);

+  // 00 10 01 11 02 12 03 13

+  // 20 30 21 31 22 32 23 33

+  // 04 14 05 15 06 16 07 17

+  // 24 34 25 35 26 36 27 37

+  // 40 50 41 51 42 52 43 53

+  // 60 70 61 71 62 72 63 73

+  // 44 54 45 55 46 56 47 57

+  // 64 74 65 75 66 76 67 77

+  const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1);

+  const __m128i tr1_1 = _mm_unpacklo_epi32(tr0_4, tr0_5);

+  const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1);

+  const __m128i tr1_3 = _mm_unpackhi_epi32(tr0_4, tr0_5);

+  const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_2, tr0_3);

+  const __m128i tr1_5 = _mm_unpacklo_epi32(tr0_6, tr0_7);

+  const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_2, tr0_3);

+  const __m128i tr1_7 = _mm_unpackhi_epi32(tr0_6, tr0_7);

+  // 00 10 20 30 01 11 21 31

+  // 40 50 60 70 41 51 61 71

+  // 02 12 22 32 03 13 23 33

+  // 42 52 62 72 43 53 63 73

+  // 04 14 24 34 05 15 25 35

+  // 44 54 64 74 45 55 65 75

+  // 06 16 26 36 07 17 27 37

+  // 46 56 66 76 47 57 67 77

+  res[0] = _mm_unpacklo_epi64(tr1_0, tr1_1);

+  res[1] = _mm_unpackhi_epi64(tr1_0, tr1_1);

+  res[2] = _mm_unpacklo_epi64(tr1_2, tr1_3);

+  res[3] = _mm_unpackhi_epi64(tr1_2, tr1_3);

+  res[4] = _mm_unpacklo_epi64(tr1_4, tr1_5);

+  res[5] = _mm_unpackhi_epi64(tr1_4, tr1_5);

+  res[6] = _mm_unpacklo_epi64(tr1_6, tr1_7);

+  res[7] = _mm_unpackhi_epi64(tr1_6, tr1_7);

+  // 00 10 20 30 40 50 60 70

+  // 01 11 21 31 41 51 61 71

+  // 02 12 22 32 42 52 62 72

+  // 03 13 23 33 43 53 63 73

+  // 04 14 24 34 44 54 64 74

+  // 05 15 25 35 45 55 65 75

+  // 06 16 26 36 46 56 66 76

+  // 07 17 27 37 47 57 67 77

+}

+static void fdct8_sse2(__m128i *in) {

+  // constants

+  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

+  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

+  const __m128i k__cospi_p24_p08 = pair_set_epi16(cospi_24_64, cospi_8_64);

+  const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64, cospi_24_64);

+  const __m128i k__cospi_p28_p04 = pair_set_epi16(cospi_28_64, cospi_4_64);

+  const __m128i k__cospi_m04_p28 = pair_set_epi16(-cospi_4_64, cospi_28_64);

+  const __m128i k__cospi_p12_p20 = pair_set_epi16(cospi_12_64, cospi_20_64);

+  const __m128i k__cospi_m20_p12 = pair_set_epi16(-cospi_20_64, cospi_12_64);

+  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

+  __m128i u0, u1, u2, u3, u4, u5, u6, u7;

+  __m128i v0, v1, v2, v3, v4, v5, v6, v7;

+  __m128i s0, s1, s2, s3, s4, s5, s6, s7;

+  // stage 1

+  s0 = _mm_add_epi16(in[0], in[7]);

+  s1 = _mm_add_epi16(in[1], in[6]);

+  s2 = _mm_add_epi16(in[2], in[5]);

+  s3 = _mm_add_epi16(in[3], in[4]);

+  s4 = _mm_sub_epi16(in[3], in[4]);

+  s5 = _mm_sub_epi16(in[2], in[5]);

+  s6 = _mm_sub_epi16(in[1], in[6]);

+  s7 = _mm_sub_epi16(in[0], in[7]);

+  u0 = _mm_add_epi16(s0, s3);

+  u1 = _mm_add_epi16(s1, s2);

+  u2 = _mm_sub_epi16(s1, s2);

+  u3 = _mm_sub_epi16(s0, s3);

+  // interleave and perform butterfly multiplication/addition

+  v0 = _mm_unpacklo_epi16(u0, u1);

+  v1 = _mm_unpackhi_epi16(u0, u1);

+  v2 = _mm_unpacklo_epi16(u2, u3);

+  v3 = _mm_unpackhi_epi16(u2, u3);

+  u0 = _mm_madd_epi16(v0, k__cospi_p16_p16);

+  u1 = _mm_madd_epi16(v1, k__cospi_p16_p16);

+  u2 = _mm_madd_epi16(v0, k__cospi_p16_m16);

+  u3 = _mm_madd_epi16(v1, k__cospi_p16_m16);

+  u4 = _mm_madd_epi16(v2, k__cospi_p24_p08);

+  u5 = _mm_madd_epi16(v3, k__cospi_p24_p08);

+  u6 = _mm_madd_epi16(v2, k__cospi_m08_p24);

+  u7 = _mm_madd_epi16(v3, k__cospi_m08_p24);

+  // shift and rounding

+  v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);

+  v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);

+  v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);

+  v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);

+  v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);

+  v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING);

+  v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);

+  v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING);

+  u0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

+  u1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

+  u2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

+  u3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

+  u4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

+  u5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

+  u6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

+  u7 = _mm_srai_epi32(v7, DCT_CONST_BITS);

+  in[0] = _mm_packs_epi32(u0, u1);

+  in[2] = _mm_packs_epi32(u4, u5);

+  in[4] = _mm_packs_epi32(u2, u3);

+  in[6] = _mm_packs_epi32(u6, u7);

+  // stage 2

+  // interleave and perform butterfly multiplication/addition

+  u0 = _mm_unpacklo_epi16(s6, s5);

+  u1 = _mm_unpackhi_epi16(s6, s5);

+  v0 = _mm_madd_epi16(u0, k__cospi_p16_m16);

+  v1 = _mm_madd_epi16(u1, k__cospi_p16_m16);

+  v2 = _mm_madd_epi16(u0, k__cospi_p16_p16);

+  v3 = _mm_madd_epi16(u1, k__cospi_p16_p16);

+  // shift and rounding

+  u0 = _mm_add_epi32(v0, k__DCT_CONST_ROUNDING);

+  u1 = _mm_add_epi32(v1, k__DCT_CONST_ROUNDING);

+  u2 = _mm_add_epi32(v2, k__DCT_CONST_ROUNDING);

+  u3 = _mm_add_epi32(v3, k__DCT_CONST_ROUNDING);

+  v0 = _mm_srai_epi32(u0, DCT_CONST_BITS);

+  v1 = _mm_srai_epi32(u1, DCT_CONST_BITS);

+  v2 = _mm_srai_epi32(u2, DCT_CONST_BITS);

+  v3 = _mm_srai_epi32(u3, DCT_CONST_BITS);

+  u0 = _mm_packs_epi32(v0, v1);

+  u1 = _mm_packs_epi32(v2, v3);

+  // stage 3

+  s0 = _mm_add_epi16(s4, u0);

+  s1 = _mm_sub_epi16(s4, u0);

+  s2 = _mm_sub_epi16(s7, u1);

+  s3 = _mm_add_epi16(s7, u1);

+  // stage 4

+  u0 = _mm_unpacklo_epi16(s0, s3);

+  u1 = _mm_unpackhi_epi16(s0, s3);

+  u2 = _mm_unpacklo_epi16(s1, s2);

+  u3 = _mm_unpackhi_epi16(s1, s2);

+  v0 = _mm_madd_epi16(u0, k__cospi_p28_p04);

+  v1 = _mm_madd_epi16(u1, k__cospi_p28_p04);

+  v2 = _mm_madd_epi16(u2, k__cospi_p12_p20);

+  v3 = _mm_madd_epi16(u3, k__cospi_p12_p20);

+  v4 = _mm_madd_epi16(u2, k__cospi_m20_p12);

+  v5 = _mm_madd_epi16(u3, k__cospi_m20_p12);

+  v6 = _mm_madd_epi16(u0, k__cospi_m04_p28);

+  v7 = _mm_madd_epi16(u1, k__cospi_m04_p28);

+  // shift and rounding

+  u0 = _mm_add_epi32(v0, k__DCT_CONST_ROUNDING);

+  u1 = _mm_add_epi32(v1, k__DCT_CONST_ROUNDING);

+  u2 = _mm_add_epi32(v2, k__DCT_CONST_ROUNDING);

+  u3 = _mm_add_epi32(v3, k__DCT_CONST_ROUNDING);

+  u4 = _mm_add_epi32(v4, k__DCT_CONST_ROUNDING);

+  u5 = _mm_add_epi32(v5, k__DCT_CONST_ROUNDING);

+  u6 = _mm_add_epi32(v6, k__DCT_CONST_ROUNDING);

+  u7 = _mm_add_epi32(v7, k__DCT_CONST_ROUNDING);

+  v0 = _mm_srai_epi32(u0, DCT_CONST_BITS);

+  v1 = _mm_srai_epi32(u1, DCT_CONST_BITS);

+  v2 = _mm_srai_epi32(u2, DCT_CONST_BITS);

+  v3 = _mm_srai_epi32(u3, DCT_CONST_BITS);

+  v4 = _mm_srai_epi32(u4, DCT_CONST_BITS);

+  v5 = _mm_srai_epi32(u5, DCT_CONST_BITS);

+  v6 = _mm_srai_epi32(u6, DCT_CONST_BITS);

+  v7 = _mm_srai_epi32(u7, DCT_CONST_BITS);

+  in[1] = _mm_packs_epi32(v0, v1);

+  in[3] = _mm_packs_epi32(v4, v5);

+  in[5] = _mm_packs_epi32(v2, v3);

+  in[7] = _mm_packs_epi32(v6, v7);

+  // transpose

+  array_transpose_8x8(in, in);

+}

+static void fadst8_sse2(__m128i *in) {

+  // Constants

+  const __m128i k__cospi_p02_p30 = pair_set_epi16(cospi_2_64, cospi_30_64);

+  const __m128i k__cospi_p30_m02 = pair_set_epi16(cospi_30_64, -cospi_2_64);

+  const __m128i k__cospi_p10_p22 = pair_set_epi16(cospi_10_64, cospi_22_64);

+  const __m128i k__cospi_p22_m10 = pair_set_epi16(cospi_22_64, -cospi_10_64);

+  const __m128i k__cospi_p18_p14 = pair_set_epi16(cospi_18_64, cospi_14_64);

+  const __m128i k__cospi_p14_m18 = pair_set_epi16(cospi_14_64, -cospi_18_64);

+  const __m128i k__cospi_p26_p06 = pair_set_epi16(cospi_26_64, cospi_6_64);

+  const __m128i k__cospi_p06_m26 = pair_set_epi16(cospi_6_64, -cospi_26_64);

+  const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);

+  const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);

+  const __m128i k__cospi_m24_p08 = pair_set_epi16(-cospi_24_64, cospi_8_64);

+  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

+  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

+  const __m128i k__const_0 = _mm_set1_epi16(0);

+  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

+  __m128i u0, u1, u2, u3, u4, u5, u6, u7, u8, u9, u10, u11, u12, u13, u14, u15;

+  __m128i v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15;

+  __m128i w0, w1, w2, w3, w4, w5, w6, w7, w8, w9, w10, w11, w12, w13, w14, w15;

+  __m128i s0, s1, s2, s3, s4, s5, s6, s7;

+  __m128i in0, in1, in2, in3, in4, in5, in6, in7;

+  // properly aligned for butterfly input

+  in0  = in[7];

+  in1  = in[0];

+  in2  = in[5];

+  in3  = in[2];

+  in4  = in[3];

+  in5  = in[4];

+  in6  = in[1];

+  in7  = in[6];

+  // column transformation

+  // stage 1

+  // interleave and multiply/add into 32-bit integer

+  s0 = _mm_unpacklo_epi16(in0, in1);

+  s1 = _mm_unpackhi_epi16(in0, in1);

+  s2 = _mm_unpacklo_epi16(in2, in3);

+  s3 = _mm_unpackhi_epi16(in2, in3);

+  s4 = _mm_unpacklo_epi16(in4, in5);

+  s5 = _mm_unpackhi_epi16(in4, in5);

+  s6 = _mm_unpacklo_epi16(in6, in7);

+  s7 = _mm_unpackhi_epi16(in6, in7);

+  u0 = _mm_madd_epi16(s0, k__cospi_p02_p30);

+  u1 = _mm_madd_epi16(s1, k__cospi_p02_p30);

+  u2 = _mm_madd_epi16(s0, k__cospi_p30_m02);

+  u3 = _mm_madd_epi16(s1, k__cospi_p30_m02);

+  u4 = _mm_madd_epi16(s2, k__cospi_p10_p22);

+  u5 = _mm_madd_epi16(s3, k__cospi_p10_p22);

+  u6 = _mm_madd_epi16(s2, k__cospi_p22_m10);

+  u7 = _mm_madd_epi16(s3, k__cospi_p22_m10);

+  u8 = _mm_madd_epi16(s4, k__cospi_p18_p14);

+  u9 = _mm_madd_epi16(s5, k__cospi_p18_p14);

+  u10 = _mm_madd_epi16(s4, k__cospi_p14_m18);

+  u11 = _mm_madd_epi16(s5, k__cospi_p14_m18);

+  u12 = _mm_madd_epi16(s6, k__cospi_p26_p06);

+  u13 = _mm_madd_epi16(s7, k__cospi_p26_p06);

+  u14 = _mm_madd_epi16(s6, k__cospi_p06_m26);

+  u15 = _mm_madd_epi16(s7, k__cospi_p06_m26);

+  // addition

+  w0 = _mm_add_epi32(u0, u8);

+  w1 = _mm_add_epi32(u1, u9);

+  w2 = _mm_add_epi32(u2, u10);

+  w3 = _mm_add_epi32(u3, u11);

+  w4 = _mm_add_epi32(u4, u12);

+  w5 = _mm_add_epi32(u5, u13);

+  w6 = _mm_add_epi32(u6, u14);

+  w7 = _mm_add_epi32(u7, u15);

+  w8 = _mm_sub_epi32(u0, u8);

+  w9 = _mm_sub_epi32(u1, u9);

+  w10 = _mm_sub_epi32(u2, u10);

+  w11 = _mm_sub_epi32(u3, u11);

+  w12 = _mm_sub_epi32(u4, u12);

+  w13 = _mm_sub_epi32(u5, u13);

+  w14 = _mm_sub_epi32(u6, u14);

+  w15 = _mm_sub_epi32(u7, u15);

+  // shift and rounding

+  v0 = _mm_add_epi32(w0, k__DCT_CONST_ROUNDING);

+  v1 = _mm_add_epi32(w1, k__DCT_CONST_ROUNDING);

+  v2 = _mm_add_epi32(w2, k__DCT_CONST_ROUNDING);

+  v3 = _mm_add_epi32(w3, k__DCT_CONST_ROUNDING);

+  v4 = _mm_add_epi32(w4, k__DCT_CONST_ROUNDING);

+  v5 = _mm_add_epi32(w5, k__DCT_CONST_ROUNDING);

+  v6 = _mm_add_epi32(w6, k__DCT_CONST_ROUNDING);

+  v7 = _mm_add_epi32(w7, k__DCT_CONST_ROUNDING);

+  v8 = _mm_add_epi32(w8, k__DCT_CONST_ROUNDING);

+  v9 = _mm_add_epi32(w9, k__DCT_CONST_ROUNDING);

+  v10 = _mm_add_epi32(w10, k__DCT_CONST_ROUNDING);

+  v11 = _mm_add_epi32(w11, k__DCT_CONST_ROUNDING);

+  v12 = _mm_add_epi32(w12, k__DCT_CONST_ROUNDING);

+  v13 = _mm_add_epi32(w13, k__DCT_CONST_ROUNDING);

+  v14 = _mm_add_epi32(w14, k__DCT_CONST_ROUNDING);

+  v15 = _mm_add_epi32(w15, k__DCT_CONST_ROUNDING);

+  u0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

+  u1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

+  u2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

+  u3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

+  u4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

+  u5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

+  u6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

+  u7 = _mm_srai_epi32(v7, DCT_CONST_BITS);

+  u8 = _mm_srai_epi32(v8, DCT_CONST_BITS);

+  u9 = _mm_srai_epi32(v9, DCT_CONST_BITS);

+  u10 = _mm_srai_epi32(v10, DCT_CONST_BITS);

+  u11 = _mm_srai_epi32(v11, DCT_CONST_BITS);

+  u12 = _mm_srai_epi32(v12, DCT_CONST_BITS);

+  u13 = _mm_srai_epi32(v13, DCT_CONST_BITS);

+  u14 = _mm_srai_epi32(v14, DCT_CONST_BITS);

+  u15 = _mm_srai_epi32(v15, DCT_CONST_BITS);

+  // back to 16-bit and pack 8 integers into __m128i

+  in[0] = _mm_packs_epi32(u0, u1);

+  in[1] = _mm_packs_epi32(u2, u3);

+  in[2] = _mm_packs_epi32(u4, u5);

+  in[3] = _mm_packs_epi32(u6, u7);

+  in[4] = _mm_packs_epi32(u8, u9);

+  in[5] = _mm_packs_epi32(u10, u11);

+  in[6] = _mm_packs_epi32(u12, u13);

+  in[7] = _mm_packs_epi32(u14, u15);

+  // stage 2

+  s0 = _mm_add_epi16(in[0], in[2]);

+  s1 = _mm_add_epi16(in[1], in[3]);

+  s2 = _mm_sub_epi16(in[0], in[2]);

+  s3 = _mm_sub_epi16(in[1], in[3]);

+  u0 = _mm_unpacklo_epi16(in[4], in[5]);

+  u1 = _mm_unpackhi_epi16(in[4], in[5]);

+  u2 = _mm_unpacklo_epi16(in[6], in[7]);

+  u3 = _mm_unpackhi_epi16(in[6], in[7]);

+  v0 = _mm_madd_epi16(u0, k__cospi_p08_p24);

+  v1 = _mm_madd_epi16(u1, k__cospi_p08_p24);

+  v2 = _mm_madd_epi16(u0, k__cospi_p24_m08);

+  v3 = _mm_madd_epi16(u1, k__cospi_p24_m08);

+  v4 = _mm_madd_epi16(u2, k__cospi_m24_p08);

+  v5 = _mm_madd_epi16(u3, k__cospi_m24_p08);

+  v6 = _mm_madd_epi16(u2, k__cospi_p08_p24);

+  v7 = _mm_madd_epi16(u3, k__cospi_p08_p24);

+  w0 = _mm_add_epi32(v0, v4);

+  w1 = _mm_add_epi32(v1, v5);

+  w2 = _mm_add_epi32(v2, v6);

+  w3 = _mm_add_epi32(v3, v7);

+  w4 = _mm_sub_epi32(v0, v4);

+  w5 = _mm_sub_epi32(v1, v5);

+  w6 = _mm_sub_epi32(v2, v6);

+  w7 = _mm_sub_epi32(v3, v7);

+  v0 = _mm_add_epi32(w0, k__DCT_CONST_ROUNDING);

+  v1 = _mm_add_epi32(w1, k__DCT_CONST_ROUNDING);

+  v2 = _mm_add_epi32(w2, k__DCT_CONST_ROUNDING);

+  v3 = _mm_add_epi32(w3, k__DCT_CONST_ROUNDING);

+  v4 = _mm_add_epi32(w4, k__DCT_CONST_ROUNDING);

+  v5 = _mm_add_epi32(w5, k__DCT_CONST_ROUNDING);

+  v6 = _mm_add_epi32(w6, k__DCT_CONST_ROUNDING);

+  v7 = _mm_add_epi32(w7, k__DCT_CONST_ROUNDING);

+  u0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

+  u1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

+  u2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

+  u3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

+  u4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

+  u5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

+  u6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

+  u7 = _mm_srai_epi32(v7, DCT_CONST_BITS);

+  // back to 16-bit intergers

+  s4 = _mm_packs_epi32(u0, u1);

+  s5 = _mm_packs_epi32(u2, u3);

+  s6 = _mm_packs_epi32(u4, u5);

+  s7 = _mm_packs_epi32(u6, u7);

+  // stage 3

+  u0 = _mm_unpacklo_epi16(s2, s3);

+  u1 = _mm_unpackhi_epi16(s2, s3);

+  u2 = _mm_unpacklo_epi16(s6, s7);

+  u3 = _mm_unpackhi_epi16(s6, s7);

+  v0 = _mm_madd_epi16(u0, k__cospi_p16_p16);

+  v1 = _mm_madd_epi16(u1, k__cospi_p16_p16);

+  v2 = _mm_madd_epi16(u0, k__cospi_p16_m16);

+  v3 = _mm_madd_epi16(u1, k__cospi_p16_m16);

+  v4 = _mm_madd_epi16(u2, k__cospi_p16_p16);

+  v5 = _mm_madd_epi16(u3, k__cospi_p16_p16);

+  v6 = _mm_madd_epi16(u2, k__cospi_p16_m16);

+  v7 = _mm_madd_epi16(u3, k__cospi_p16_m16);

+  u0 = _mm_add_epi32(v0, k__DCT_CONST_ROUNDING);

+  u1 = _mm_add_epi32(v1, k__DCT_CONST_ROUNDING);

+  u2 = _mm_add_epi32(v2, k__DCT_CONST_ROUNDING);

+  u3 = _mm_add_epi32(v3, k__DCT_CONST_ROUNDING);

+  u4 = _mm_add_epi32(v4, k__DCT_CONST_ROUNDING);

+  u5 = _mm_add_epi32(v5, k__DCT_CONST_ROUNDING);

+  u6 = _mm_add_epi32(v6, k__DCT_CONST_ROUNDING);

+  u7 = _mm_add_epi32(v7, k__DCT_CONST_ROUNDING);

+  v0 = _mm_srai_epi32(u0, DCT_CONST_BITS);

+  v1 = _mm_srai_epi32(u1, DCT_CONST_BITS);

+  v2 = _mm_srai_epi32(u2, DCT_CONST_BITS);

+  v3 = _mm_srai_epi32(u3, DCT_CONST_BITS);

+  v4 = _mm_srai_epi32(u4, DCT_CONST_BITS);

+  v5 = _mm_srai_epi32(u5, DCT_CONST_BITS);

+  v6 = _mm_srai_epi32(u6, DCT_CONST_BITS);

+  v7 = _mm_srai_epi32(u7, DCT_CONST_BITS);

+  s2 = _mm_packs_epi32(v0, v1);

+  s3 = _mm_packs_epi32(v2, v3);

+  s6 = _mm_packs_epi32(v4, v5);

+  s7 = _mm_packs_epi32(v6, v7);

+  // FIXME(jingning): do subtract using bit inversion?

+  in[0] = s0;

+  in[1] = _mm_sub_epi16(k__const_0, s4);

+  in[2] = s6;

+  in[3] = _mm_sub_epi16(k__const_0, s2);

+  in[4] = s3;

+  in[5] = _mm_sub_epi16(k__const_0, s7);

+  in[6] = s5;

+  in[7] = _mm_sub_epi16(k__const_0, s1);

+  // transpose

+  array_transpose_8x8(in, in);

+}

+void vp10_fht8x8_sse2(const int16_t *input, tran_low_t *output,

+                     int stride, int tx_type) {

+  __m128i in[8];

+  switch (tx_type) {

+    case DCT_DCT:

+      vpx_fdct8x8_sse2(input, output, stride);

+      break;

+    case ADST_DCT:

+      load_buffer_8x8(input, in, stride);

+      fadst8_sse2(in);

+      fdct8_sse2(in);

+      right_shift_8x8(in, 1);

+      write_buffer_8x8(output, in, 8);

+      break;

+    case DCT_ADST:

+      load_buffer_8x8(input, in, stride);

+      fdct8_sse2(in);

+      fadst8_sse2(in);

+      right_shift_8x8(in, 1);

+      write_buffer_8x8(output, in, 8);

+      break;

+    case ADST_ADST:

+      load_buffer_8x8(input, in, stride);

+      fadst8_sse2(in);

+      fadst8_sse2(in);

+      right_shift_8x8(in, 1);

+      write_buffer_8x8(output, in, 8);

+      break;

+    default:

+      assert(0);

+      break;

+  }

+}

+static INLINE void load_buffer_16x16(const int16_t* input, __m128i *in0,

+                                     __m128i *in1, int stride) {

+  // load first 8 columns

+  load_buffer_8x8(input, in0, stride);

+  load_buffer_8x8(input + 8 * stride, in0 + 8, stride);

+  input += 8;

+  // load second 8 columns

+  load_buffer_8x8(input, in1, stride);

+  load_buffer_8x8(input + 8 * stride, in1 + 8, stride);

+}

+static INLINE void write_buffer_16x16(tran_low_t *output, __m128i *in0,

+                                      __m128i *in1, int stride) {

+  // write first 8 columns

+  write_buffer_8x8(output, in0, stride);

+  write_buffer_8x8(output + 8 * stride, in0 + 8, stride);

+  // write second 8 columns

+  output += 8;

+  write_buffer_8x8(output, in1, stride);

+  write_buffer_8x8(output + 8 * stride, in1 + 8, stride);

+}

+static INLINE void array_transpose_16x16(__m128i *res0, __m128i *res1) {

+  __m128i tbuf[8];

+  array_transpose_8x8(res0, res0);

+  array_transpose_8x8(res1, tbuf);

+  array_transpose_8x8(res0 + 8, res1);

+  array_transpose_8x8(res1 + 8, res1 + 8);

+  res0[8] = tbuf[0];

+  res0[9] = tbuf[1];

+  res0[10] = tbuf[2];

+  res0[11] = tbuf[3];

+  res0[12] = tbuf[4];

+  res0[13] = tbuf[5];

+  res0[14] = tbuf[6];

+  res0[15] = tbuf[7];

+}

+static INLINE void right_shift_16x16(__m128i *res0, __m128i *res1) {

+  // perform rounding operations

+  right_shift_8x8(res0, 2);

+  right_shift_8x8(res0 + 8, 2);

+  right_shift_8x8(res1, 2);

+  right_shift_8x8(res1 + 8, 2);

+}

+static void fdct16_8col(__m128i *in) {

+  // perform 16x16 1-D DCT for 8 columns

+  __m128i i[8], s[8], p[8], t[8], u[16], v[16];

+  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

+  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

+  const __m128i k__cospi_m16_p16 = pair_set_epi16(-cospi_16_64, cospi_16_64);

+  const __m128i k__cospi_p24_p08 = pair_set_epi16(cospi_24_64, cospi_8_64);

+  const __m128i k__cospi_p08_m24 = pair_set_epi16(cospi_8_64, -cospi_24_64);

+  const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64, cospi_24_64);

+  const __m128i k__cospi_p28_p04 = pair_set_epi16(cospi_28_64, cospi_4_64);

+  const __m128i k__cospi_m04_p28 = pair_set_epi16(-cospi_4_64, cospi_28_64);

+  const __m128i k__cospi_p12_p20 = pair_set_epi16(cospi_12_64, cospi_20_64);

+  const __m128i k__cospi_m20_p12 = pair_set_epi16(-cospi_20_64, cospi_12_64);

+  const __m128i k__cospi_p30_p02 = pair_set_epi16(cospi_30_64, cospi_2_64);

+  const __m128i k__cospi_p14_p18 = pair_set_epi16(cospi_14_64, cospi_18_64);

+  const __m128i k__cospi_m02_p30 = pair_set_epi16(-cospi_2_64, cospi_30_64);

+  const __m128i k__cospi_m18_p14 = pair_set_epi16(-cospi_18_64, cospi_14_64);

+  const __m128i k__cospi_p22_p10 = pair_set_epi16(cospi_22_64, cospi_10_64);

+  const __m128i k__cospi_p06_p26 = pair_set_epi16(cospi_6_64, cospi_26_64);

+  const __m128i k__cospi_m10_p22 = pair_set_epi16(-cospi_10_64, cospi_22_64);

+  const __m128i k__cospi_m26_p06 = pair_set_epi16(-cospi_26_64, cospi_6_64);

+  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

+  // stage 1

+  i[0] = _mm_add_epi16(in[0], in[15]);

+  i[1] = _mm_add_epi16(in[1], in[14]);

+  i[2] = _mm_add_epi16(in[2], in[13]);

+  i[3] = _mm_add_epi16(in[3], in[12]);

+  i[4] = _mm_add_epi16(in[4], in[11]);

+  i[5] = _mm_add_epi16(in[5], in[10]);

+  i[6] = _mm_add_epi16(in[6], in[9]);

+  i[7] = _mm_add_epi16(in[7], in[8]);

+  s[0] = _mm_sub_epi16(in[7], in[8]);

+  s[1] = _mm_sub_epi16(in[6], in[9]);

+  s[2] = _mm_sub_epi16(in[5], in[10]);

+  s[3] = _mm_sub_epi16(in[4], in[11]);

+  s[4] = _mm_sub_epi16(in[3], in[12]);

+  s[5] = _mm_sub_epi16(in[2], in[13]);

+  s[6] = _mm_sub_epi16(in[1], in[14]);

+  s[7] = _mm_sub_epi16(in[0], in[15]);

+  p[0] = _mm_add_epi16(i[0], i[7]);

+  p[1] = _mm_add_epi16(i[1], i[6]);

+  p[2] = _mm_add_epi16(i[2], i[5]);

+  p[3] = _mm_add_epi16(i[3], i[4]);

+  p[4] = _mm_sub_epi16(i[3], i[4]);

+  p[5] = _mm_sub_epi16(i[2], i[5]);

+  p[6] = _mm_sub_epi16(i[1], i[6]);

+  p[7] = _mm_sub_epi16(i[0], i[7]);

+  u[0] = _mm_add_epi16(p[0], p[3]);

+  u[1] = _mm_add_epi16(p[1], p[2]);

+  u[2] = _mm_sub_epi16(p[1], p[2]);

+  u[3] = _mm_sub_epi16(p[0], p[3]);

+  v[0] = _mm_unpacklo_epi16(u[0], u[1]);

+  v[1] = _mm_unpackhi_epi16(u[0], u[1]);

+  v[2] = _mm_unpacklo_epi16(u[2], u[3]);

+  v[3] = _mm_unpackhi_epi16(u[2], u[3]);

+  u[0] = _mm_madd_epi16(v[0], k__cospi_p16_p16);

+  u[1] = _mm_madd_epi16(v[1], k__cospi_p16_p16);

+  u[2] = _mm_madd_epi16(v[0], k__cospi_p16_m16);

+  u[3] = _mm_madd_epi16(v[1], k__cospi_p16_m16);

+  u[4] = _mm_madd_epi16(v[2], k__cospi_p24_p08);

+  u[5] = _mm_madd_epi16(v[3], k__cospi_p24_p08);

+  u[6] = _mm_madd_epi16(v[2], k__cospi_m08_p24);

+  u[7] = _mm_madd_epi16(v[3], k__cospi_m08_p24);

+  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

+  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

+  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

+  v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

+  v[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);

+  v[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);

+  v[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);

+  v[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);

+  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

+  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

+  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

+  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);

+  u[4] = _mm_srai_epi32(v[4], DCT_CONST_BITS);

+  u[5] = _mm_srai_epi32(v[5], DCT_CONST_BITS);

+  u[6] = _mm_srai_epi32(v[6], DCT_CONST_BITS);

+  u[7] = _mm_srai_epi32(v[7], DCT_CONST_BITS);

+  in[0] = _mm_packs_epi32(u[0], u[1]);

+  in[4] = _mm_packs_epi32(u[4], u[5]);

+  in[8] = _mm_packs_epi32(u[2], u[3]);

+  in[12] = _mm_packs_epi32(u[6], u[7]);

+  u[0] = _mm_unpacklo_epi16(p[5], p[6]);

+  u[1] = _mm_unpackhi_epi16(p[5], p[6]);

+  v[0] = _mm_madd_epi16(u[0], k__cospi_m16_p16);

+  v[1] = _mm_madd_epi16(u[1], k__cospi_m16_p16);

+  v[2] = _mm_madd_epi16(u[0], k__cospi_p16_p16);

+  v[3] = _mm_madd_epi16(u[1], k__cospi_p16_p16);

+  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

+  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

+  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

+  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

+  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

+  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

+  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

+  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

+  u[0] = _mm_packs_epi32(v[0], v[1]);

+  u[1] = _mm_packs_epi32(v[2], v[3]);

+  t[0] = _mm_add_epi16(p[4], u[0]);

+  t[1] = _mm_sub_epi16(p[4], u[0]);

+  t[2] = _mm_sub_epi16(p[7], u[1]);

+  t[3] = _mm_add_epi16(p[7], u[1]);

+  u[0] = _mm_unpacklo_epi16(t[0], t[3]);

+  u[1] = _mm_unpackhi_epi16(t[0], t[3]);

+  u[2] = _mm_unpacklo_epi16(t[1], t[2]);

+  u[3] = _mm_unpackhi_epi16(t[1], t[2]);

+  v[0] = _mm_madd_epi16(u[0], k__cospi_p28_p04);

+  v[1] = _mm_madd_epi16(u[1], k__cospi_p28_p04);

+  v[2] = _mm_madd_epi16(u[2], k__cospi_p12_p20);

+  v[3] = _mm_madd_epi16(u[3], k__cospi_p12_p20);

+  v[4] = _mm_madd_epi16(u[2], k__cospi_m20_p12);

+  v[5] = _mm_madd_epi16(u[3], k__cospi_m20_p12);

+  v[6] = _mm_madd_epi16(u[0], k__cospi_m04_p28);

+  v[7] = _mm_madd_epi16(u[1], k__cospi_m04_p28);

+  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

+  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

+  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

+  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

+  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

+  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

+  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

+  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);

+  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

+  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

+  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

+  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

+  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

+  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

+  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

+  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

+  in[2] = _mm_packs_epi32(v[0], v[1]);

+  in[6] = _mm_packs_epi32(v[4], v[5]);

+  in[10] = _mm_packs_epi32(v[2], v[3]);

+  in[14] = _mm_packs_epi32(v[6], v[7]);

+  // stage 2

+  u[0] = _mm_unpacklo_epi16(s[2], s[5]);

+  u[1] = _mm_unpackhi_epi16(s[2], s[5]);

+  u[2] = _mm_unpacklo_epi16(s[3], s[4]);

+  u[3] = _mm_unpackhi_epi16(s[3], s[4]);

+  v[0] = _mm_madd_epi16(u[0], k__cospi_m16_p16);

+  v[1] = _mm_madd_epi16(u[1], k__cospi_m16_p16);

+  v[2] = _mm_madd_epi16(u[2], k__cospi_m16_p16);

+  v[3] = _mm_madd_epi16(u[3], k__cospi_m16_p16);

+  v[4] = _mm_madd_epi16(u[2], k__cospi_p16_p16);

+  v[5] = _mm_madd_epi16(u[3], k__cospi_p16_p16);

+  v[6] = _mm_madd_epi16(u[0], k__cospi_p16_p16);

+  v[7] = _mm_madd_epi16(u[1], k__cospi_p16_p16);

+  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

+  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

+  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

+  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

+  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

+  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

+  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

+  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);

+  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

+  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

+  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

+  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

+  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

+  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

+  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

+  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

+  t[2] = _mm_packs_epi32(v[0], v[1]);

+  t[3] = _mm_packs_epi32(v[2], v[3]);

+  t[4] = _mm_packs_epi32(v[4], v[5]);

+  t[5] = _mm_packs_epi32(v[6], v[7]);

+  // stage 3

+  p[0] = _mm_add_epi16(s[0], t[3]);

+  p[1] = _mm_add_epi16(s[1], t[2]);

+  p[2] = _mm_sub_epi16(s[1], t[2]);

+  p[3] = _mm_sub_epi16(s[0], t[3]);

+  p[4] = _mm_sub_epi16(s[7], t[4]);

+  p[5] = _mm_sub_epi16(s[6], t[5]);

+  p[6] = _mm_add_epi16(s[6], t[5]);

+  p[7] = _mm_add_epi16(s[7], t[4]);

+  // stage 4

+  u[0] = _mm_unpacklo_epi16(p[1], p[6]);

+  u[1] = _mm_unpackhi_epi16(p[1], p[6]);

+  u[2] = _mm_unpacklo_epi16(p[2], p[5]);

+  u[3] = _mm_unpackhi_epi16(p[2], p[5]);

+  v[0] = _mm_madd_epi16(u[0], k__cospi_m08_p24);

+  v[1] = _mm_madd_epi16(u[1], k__cospi_m08_p24);

+  v[2] = _mm_madd_epi16(u[2], k__cospi_p24_p08);

+  v[3] = _mm_madd_epi16(u[3], k__cospi_p24_p08);

+  v[4] = _mm_madd_epi16(u[2], k__cospi_p08_m24);

+  v[5] = _mm_madd_epi16(u[3], k__cospi_p08_m24);

+  v[6] = _mm_madd_epi16(u[0], k__cospi_p24_p08);

+  v[7] = _mm_madd_epi16(u[1], k__cospi_p24_p08);

+  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

+  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

+  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

+  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

+  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

+  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

+  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

+  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);

+  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

+  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

+  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

+  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

+  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

+  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

+  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

+  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

+  t[1] = _mm_packs_epi32(v[0], v[1]);

+  t[2] = _mm_packs_epi32(v[2], v[3]);

+  t[5] = _mm_packs_epi32(v[4], v[5]);

+  t[6] = _mm_packs_epi32(v[6], v[7]);

+  // stage 5

+  s[0] = _mm_add_epi16(p[0], t[1]);

+  s[1] = _mm_sub_epi16(p[0], t[1]);

+  s[2] = _mm_add_epi16(p[3], t[2]);

+  s[3] = _mm_sub_epi16(p[3], t[2]);

+  s[4] = _mm_sub_epi16(p[4], t[5]);

+  s[5] = _mm_add_epi16(p[4], t[5]);

+  s[6] = _mm_sub_epi16(p[7], t[6]);

+  s[7] = _mm_add_epi16(p[7], t[6]);

+  // stage 6

+  u[0] = _mm_unpacklo_epi16(s[0], s[7]);

+  u[1] = _mm_unpackhi_epi16(s[0], s[7]);

+  u[2] = _mm_unpacklo_epi16(s[1], s[6]);

+  u[3] = _mm_unpackhi_epi16(s[1], s[6]);

+  u[4] = _mm_unpacklo_epi16(s[2], s[5]);

+  u[5] = _mm_unpackhi_epi16(s[2], s[5]);

+  u[6] = _mm_unpacklo_epi16(s[3], s[4]);

+  u[7] = _mm_unpackhi_epi16(s[3], s[4]);

+  v[0] = _mm_madd_epi16(u[0], k__cospi_p30_p02);

+  v[1] = _mm_madd_epi16(u[1], k__cospi_p30_p02);

+  v[2] = _mm_madd_epi16(u[2], k__cospi_p14_p18);

+  v[3] = _mm_madd_epi16(u[3], k__cospi_p14_p18);

+  v[4] = _mm_madd_epi16(u[4], k__cospi_p22_p10);

+  v[5] = _mm_madd_epi16(u[5], k__cospi_p22_p10);

+  v[6] = _mm_madd_epi16(u[6], k__cospi_p06_p26);

+  v[7] = _mm_madd_epi16(u[7], k__cospi_p06_p26);

+  v[8] = _mm_madd_epi16(u[6], k__cospi_m26_p06);

+  v[9] = _mm_madd_epi16(u[7], k__cospi_m26_p06);

+  v[10] = _mm_madd_epi16(u[4], k__cospi_m10_p22);

+  v[11] = _mm_madd_epi16(u[5], k__cospi_m10_p22);

+  v[12] = _mm_madd_epi16(u[2], k__cospi_m18_p14);

+  v[13] = _mm_madd_epi16(u[3], k__cospi_m18_p14);

+  v[14] = _mm_madd_epi16(u[0], k__cospi_m02_p30);

+  v[15] = _mm_madd_epi16(u[1], k__cospi_m02_p30);

+  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

+  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

+  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

+  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

+  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

+  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

+  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

+  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);

+  u[8] = _mm_add_epi32(v[8], k__DCT_CONST_ROUNDING);

+  u[9] = _mm_add_epi32(v[9], k__DCT_CONST_ROUNDING);

+  u[10] = _mm_add_epi32(v[10], k__DCT_CONST_ROUNDING);

+  u[11] = _mm_add_epi32(v[11], k__DCT_CONST_ROUNDING);

+  u[12] = _mm_add_epi32(v[12], k__DCT_CONST_ROUNDING);

+  u[13] = _mm_add_epi32(v[13], k__DCT_CONST_ROUNDING);

+  u[14] = _mm_add_epi32(v[14], k__DCT_CONST_ROUNDING);

+  u[15] = _mm_add_epi32(v[15], k__DCT_CONST_ROUNDING);

+  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

+  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

+  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

+  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

+  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

+  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

+  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

+  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

+  v[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);

+  v[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);

+  v[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);

+  v[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);

+  v[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);

+  v[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);

+  v[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);

+  v[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);

+  in[1]  = _mm_packs_epi32(v[0], v[1]);

+  in[9]  = _mm_packs_epi32(v[2], v[3]);

+  in[5]  = _mm_packs_epi32(v[4], v[5]);

+  in[13] = _mm_packs_epi32(v[6], v[7]);

+  in[3]  = _mm_packs_epi32(v[8], v[9]);

+  in[11] = _mm_packs_epi32(v[10], v[11]);

+  in[7]  = _mm_packs_epi32(v[12], v[13]);

+  in[15] = _mm_packs_epi32(v[14], v[15]);

+}

+static void fadst16_8col(__m128i *in) {

+  // perform 16x16 1-D ADST for 8 columns

+  __m128i s[16], x[16], u[32], v[32];

+  const __m128i k__cospi_p01_p31 = pair_set_epi16(cospi_1_64, cospi_31_64);

+  const __m128i k__cospi_p31_m01 = pair_set_epi16(cospi_31_64, -cospi_1_64);

+  const __m128i k__cospi_p05_p27 = pair_set_epi16(cospi_5_64, cospi_27_64);

+  const __m128i k__cospi_p27_m05 = pair_set_epi16(cospi_27_64, -cospi_5_64);

+  const __m128i k__cospi_p09_p23 = pair_set_epi16(cospi_9_64, cospi_23_64);

+  const __m128i k__cospi_p23_m09 = pair_set_epi16(cospi_23_64, -cospi_9_64);

+  const __m128i k__cospi_p13_p19 = pair_set_epi16(cospi_13_64, cospi_19_64);

+  const __m128i k__cospi_p19_m13 = pair_set_epi16(cospi_19_64, -cospi_13_64);

+  const __m128i k__cospi_p17_p15 = pair_set_epi16(cospi_17_64, cospi_15_64);

+  const __m128i k__cospi_p15_m17 = pair_set_epi16(cospi_15_64, -cospi_17_64);

+  const __m128i k__cospi_p21_p11 = pair_set_epi16(cospi_21_64, cospi_11_64);

+  const __m128i k__cospi_p11_m21 = pair_set_epi16(cospi_11_64, -cospi_21_64);

+  const __m128i k__cospi_p25_p07 = pair_set_epi16(cospi_25_64, cospi_7_64);

+  const __m128i k__cospi_p07_m25 = pair_set_epi16(cospi_7_64, -cospi_25_64);

+  const __m128i k__cospi_p29_p03 = pair_set_epi16(cospi_29_64, cospi_3_64);

+  const __m128i k__cospi_p03_m29 = pair_set_epi16(cospi_3_64, -cospi_29_64);

+  const __m128i k__cospi_p04_p28 = pair_set_epi16(cospi_4_64, cospi_28_64);

+  const __m128i k__cospi_p28_m04 = pair_set_epi16(cospi_28_64, -cospi_4_64);

+  const __m128i k__cospi_p20_p12 = pair_set_epi16(cospi_20_64, cospi_12_64);

+  const __m128i k__cospi_p12_m20 = pair_set_epi16(cospi_12_64, -cospi_20_64);

+  const __m128i k__cospi_m28_p04 = pair_set_epi16(-cospi_28_64, cospi_4_64);

+  const __m128i k__cospi_m12_p20 = pair_set_epi16(-cospi_12_64, cospi_20_64);

+  const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);

+  const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);

+  const __m128i k__cospi_m24_p08 = pair_set_epi16(-cospi_24_64, cospi_8_64);

+  const __m128i k__cospi_m16_m16 = _mm_set1_epi16((int16_t)-cospi_16_64);

+  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

+  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

+  const __m128i k__cospi_m16_p16 = pair_set_epi16(-cospi_16_64, cospi_16_64);

+  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

+  const __m128i kZero = _mm_set1_epi16(0);

+  u[0] = _mm_unpacklo_epi16(in[15], in[0]);

+  u[1] = _mm_unpackhi_epi16(in[15], in[0]);

+  u[2] = _mm_unpacklo_epi16(in[13], in[2]);

+  u[3] = _mm_unpackhi_epi16(in[13], in[2]);

+  u[4] = _mm_unpacklo_epi16(in[11], in[4]);

+  u[5] = _mm_unpackhi_epi16(in[11], in[4]);

+  u[6] = _mm_unpacklo_epi16(in[9], in[6]);

+  u[7] = _mm_unpackhi_epi16(in[9], in[6]);

+  u[8] = _mm_unpacklo_epi16(in[7], in[8]);

+  u[9] = _mm_unpackhi_epi16(in[7], in[8]);

+  u[10] = _mm_unpacklo_epi16(in[5], in[10]);

+  u[11] = _mm_unpackhi_epi16(in[5], in[10]);

+  u[12] = _mm_unpacklo_epi16(in[3], in[12]);

+  u[13] = _mm_unpackhi_epi16(in[3], in[12]);

+  u[14] = _mm_unpacklo_epi16(in[1], in[14]);

+  u[15] = _mm_unpackhi_epi16(in[1], in[14]);

+  v[0] = _mm_madd_epi16(u[0], k__cospi_p01_p31);

+  v[1] = _mm_madd_epi16(u[1], k__cospi_p01_p31);

+  v[2] = _mm_madd_epi16(u[0], k__cospi_p31_m01);

+  v[3] = _mm_madd_epi16(u[1], k__cospi_p31_m01);

+  v[4] = _mm_madd_epi16(u[2], k__cospi_p05_p27);

+  v[5] = _mm_madd_epi16(u[3], k__cospi_p05_p27);

+  v[6] = _mm_madd_epi16(u[2], k__cospi_p27_m05);

+  v[7] = _mm_madd_epi16(u[3], k__cospi_p27_m05);

+  v[8] = _mm_madd_epi16(u[4], k__cospi_p09_p23);

+  v[9] = _mm_madd_epi16(u[5], k__cospi_p09_p23);

+  v[10] = _mm_madd_epi16(u[4], k__cospi_p23_m09);

+  v[11] = _mm_madd_epi16(u[5], k__cospi_p23_m09);

+  v[12] = _mm_madd_epi16(u[6], k__cospi_p13_p19);

+  v[13] = _mm_madd_epi16(u[7], k__cospi_p13_p19);

+  v[14] = _mm_madd_epi16(u[6], k__cospi_p19_m13);

+  v[15] = _mm_madd_epi16(u[7], k__cospi_p19_m13);

+  v[16] = _mm_madd_epi16(u[8], k__cospi_p17_p15);

+  v[17] = _mm_madd_epi16(u[9], k__cospi_p17_p15);

+  v[18] = _mm_madd_epi16(u[8], k__cospi_p15_m17);

+  v[19] = _mm_madd_epi16(u[9], k__cospi_p15_m17);

+  v[20] = _mm_madd_epi16(u[10], k__cospi_p21_p11);

+  v[21] = _mm_madd_epi16(u[11], k__cospi_p21_p11);

+  v[22] = _mm_madd_epi16(u[10], k__cospi_p11_m21);

+  v[23] = _mm_madd_epi16(u[11], k__cospi_p11_m21);

+  v[24] = _mm_madd_epi16(u[12], k__cospi_p25_p07);

+  v[25] = _mm_madd_epi16(u[13], k__cospi_p25_p07);

+  v[26] = _mm_madd_epi16(u[12], k__cospi_p07_m25);

+  v[27] = _mm_madd_epi16(u[13], k__cospi_p07_m25);

+  v[28] = _mm_madd_epi16(u[14], k__cospi_p29_p03);

+  v[29] = _mm_madd_epi16(u[15], k__cospi_p29_p03);

+  v[30] = _mm_madd_epi16(u[14], k__cospi_p03_m29);

+  v[31] = _mm_madd_epi16(u[15], k__cospi_p03_m29);

+  u[0] = _mm_add_epi32(v[0], v[16]);

+  u[1] = _mm_add_epi32(v[1], v[17]);

+  u[2] = _mm_add_epi32(v[2], v[18]);

+  u[3] = _mm_add_epi32(v[3], v[19]);

+  u[4] = _mm_add_epi32(v[4], v[20]);

+  u[5] = _mm_add_epi32(v[5], v[21]);

+  u[6] = _mm_add_epi32(v[6], v[22]);

+  u[7] = _mm_add_epi32(v[7], v[23]);

+  u[8] = _mm_add_epi32(v[8], v[24]);

+  u[9] = _mm_add_epi32(v[9], v[25]);

+  u[10] = _mm_add_epi32(v[10], v[26]);

+  u[11] = _mm_add_epi32(v[11], v[27]);

+  u[12] = _mm_add_epi32(v[12], v[28]);

+  u[13] = _mm_add_epi32(v[13], v[29]);

+  u[14] = _mm_add_epi32(v[14], v[30]);

+  u[15] = _mm_add_epi32(v[15], v[31]);

+  u[16] = _mm_sub_epi32(v[0], v[16]);

+  u[17] = _mm_sub_epi32(v[1], v[17]);

+  u[18] = _mm_sub_epi32(v[2], v[18]);

+  u[19] = _mm_sub_epi32(v[3], v[19]);

+  u[20] = _mm_sub_epi32(v[4], v[20]);

+  u[21] = _mm_sub_epi32(v[5], v[21]);

+  u[22] = _mm_sub_epi32(v[6], v[22]);

+  u[23] = _mm_sub_epi32(v[7], v[23]);

+  u[24] = _mm_sub_epi32(v[8], v[24]);

+  u[25] = _mm_sub_epi32(v[9], v[25]);

+  u[26] = _mm_sub_epi32(v[10], v[26]);

+  u[27] = _mm_sub_epi32(v[11], v[27]);

+  u[28] = _mm_sub_epi32(v[12], v[28]);

+  u[29] = _mm_sub_epi32(v[13], v[29]);

+  u[30] = _mm_sub_epi32(v[14], v[30]);

+  u[31] = _mm_sub_epi32(v[15], v[31]);

+  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

+  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

+  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

+  v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

+  v[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);

+  v[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);

+  v[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);

+  v[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);

+  v[8] = _mm_add_epi32(u[8], k__DCT_CONST_ROUNDING);

+  v[9] = _mm_add_epi32(u[9], k__DCT_CONST_ROUNDING);

+  v[10] = _mm_add_epi32(u[10], k__DCT_CONST_ROUNDING);

+  v[11] = _mm_add_epi32(u[11], k__DCT_CONST_ROUNDING);

+  v[12] = _mm_add_epi32(u[12], k__DCT_CONST_ROUNDING);

+  v[13] = _mm_add_epi32(u[13], k__DCT_CONST_ROUNDING);

+  v[14] = _mm_add_epi32(u[14], k__DCT_CONST_ROUNDING);

+  v[15] = _mm_add_epi32(u[15], k__DCT_CONST_ROUNDING);

+  v[16] = _mm_add_epi32(u[16], k__DCT_CONST_ROUNDING);

+  v[17] = _mm_add_epi32(u[17], k__DCT_CONST_ROUNDING);

+  v[18] = _mm_add_epi32(u[18], k__DCT_CONST_ROUNDING);

+  v[19] = _mm_add_epi32(u[19], k__DCT_CONST_ROUNDING);

+  v[20] = _mm_add_epi32(u[20], k__DCT_CONST_ROUNDING);

+  v[21] = _mm_add_epi32(u[21], k__DCT_CONST_ROUNDING);

+  v[22] = _mm_add_epi32(u[22], k__DCT_CONST_ROUNDING);

+  v[23] = _mm_add_epi32(u[23], k__DCT_CONST_ROUNDING);

+  v[24] = _mm_add_epi32(u[24], k__DCT_CONST_ROUNDING);

+  v[25] = _mm_add_epi32(u[25], k__DCT_CONST_ROUNDING);

+  v[26] = _mm_add_epi32(u[26], k__DCT_CONST_ROUNDING);

+  v[27] = _mm_add_epi32(u[27], k__DCT_CONST_ROUNDING);

+  v[28] = _mm_add_epi32(u[28], k__DCT_CONST_ROUNDING);

+  v[29] = _mm_add_epi32(u[29], k__DCT_CONST_ROUNDING);

+  v[30] = _mm_add_epi32(u[30], k__DCT_CONST_ROUNDING);

+  v[31] = _mm_add_epi32(u[31], k__DCT_CONST_ROUNDING);

+  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

+  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

+  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

+  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);

+  u[4] = _mm_srai_epi32(v[4], DCT_CONST_BITS);

+  u[5] = _mm_srai_epi32(v[5], DCT_CONST_BITS);

+  u[6] = _mm_srai_epi32(v[6], DCT_CONST_BITS);

+  u[7] = _mm_srai_epi32(v[7], DCT_CONST_BITS);

+  u[8] = _mm_srai_epi32(v[8], DCT_CONST_BITS);

+  u[9] = _mm_srai_epi32(v[9], DCT_CONST_BITS);

+  u[10] = _mm_srai_epi32(v[10], DCT_CONST_BITS);

+  u[11] = _mm_srai_epi32(v[11], DCT_CONST_BITS);

+  u[12] = _mm_srai_epi32(v[12], DCT_CONST_BITS);

+  u[13] = _mm_srai_epi32(v[13], DCT_CONST_BITS);

+  u[14] = _mm_srai_epi32(v[14], DCT_CONST_BITS);

+  u[15] = _mm_srai_epi32(v[15], DCT_CONST_BITS);

+  u[16] = _mm_srai_epi32(v[16], DCT_CONST_BITS);

+  u[17] = _mm_srai_epi32(v[17], DCT_CONST_BITS);

+  u[18] = _mm_srai_epi32(v[18], DCT_CONST_BITS);

+  u[19] = _mm_srai_epi32(v[19], DCT_CONST_BITS);

+  u[20] = _mm_srai_epi32(v[20], DCT_CONST_BITS);

+  u[21] = _mm_srai_epi32(v[21], DCT_CONST_BITS);

+  u[22] = _mm_srai_epi32(v[22], DCT_CONST_BITS);

+  u[23] = _mm_srai_epi32(v[23], DCT_CONST_BITS);

+  u[24] = _mm_srai_epi32(v[24], DCT_CONST_BITS);

+  u[25] = _mm_srai_epi32(v[25], DCT_CONST_BITS);

+  u[26] = _mm_srai_epi32(v[26], DCT_CONST_BITS);

+  u[27] = _mm_srai_epi32(v[27], DCT_CONST_BITS);

+  u[28] = _mm_srai_epi32(v[28], DCT_CONST_BITS);

+  u[29] = _mm_srai_epi32(v[29], DCT_CONST_BITS);

+  u[30] = _mm_srai_epi32(v[30], DCT_CONST_BITS);

+  u[31] = _mm_srai_epi32(v[31], DCT_CONST_BITS);

+  s[0] = _mm_packs_epi32(u[0], u[1]);

+  s[1] = _mm_packs_epi32(u[2], u[3]);

+  s[2] = _mm_packs_epi32(u[4], u[5]);

+  s[3] = _mm_packs_epi32(u[6], u[7]);

+  s[4] = _mm_packs_epi32(u[8], u[9]);

+  s[5] = _mm_packs_epi32(u[10], u[11]);

+  s[6] = _mm_packs_epi32(u[12], u[13]);

+  s[7] = _mm_packs_epi32(u[14], u[15]);

+  s[8] = _mm_packs_epi32(u[16], u[17]);

+  s[9] = _mm_packs_epi32(u[18], u[19]);

+  s[10] = _mm_packs_epi32(u[20], u[21]);

+  s[11] = _mm_packs_epi32(u[22], u[23]);

+  s[12] = _mm_packs_epi32(u[24], u[25]);

+  s[13] = _mm_packs_epi32(u[26], u[27]);

+  s[14] = _mm_packs_epi32(u[28], u[29]);

+  s[15] = _mm_packs_epi32(u[30], u[31]);

+  // stage 2

+  u[0] = _mm_unpacklo_epi16(s[8], s[9]);

+  u[1] = _mm_unpackhi_epi16(s[8], s[9]);

+  u[2] = _mm_unpacklo_epi16(s[10], s[11]);

+  u[3] = _mm_unpackhi_epi16(s[10], s[11]);

+  u[4] = _mm_unpacklo_epi16(s[12], s[13]);

+  u[5] = _mm_unpackhi_epi16(s[12], s[13]);

+  u[6] = _mm_unpacklo_epi16(s[14], s[15]);

+  u[7] = _mm_unpackhi_epi16(s[14], s[15]);

+  v[0] = _mm_madd_epi16(u[0], k__cospi_p04_p28);

+  v[1] = _mm_madd_epi16(u[1], k__cospi_p04_p28);

+  v[2] = _mm_madd_epi16(u[0], k__cospi_p28_m04);

+  v[3] = _mm_madd_epi16(u[1], k__cospi_p28_m04);

+  v[4] = _mm_madd_epi16(u[2], k__cospi_p20_p12);

+  v[5] = _mm_madd_epi16(u[3], k__cospi_p20_p12);

+  v[6] = _mm_madd_epi16(u[2], k__cospi_p12_m20);

+  v[7] = _mm_madd_epi16(u[3], k__cospi_p12_m20);

+  v[8] = _mm_madd_epi16(u[4], k__cospi_m28_p04);

+  v[9] = _mm_madd_epi16(u[5], k__cospi_m28_p04);

+  v[10] = _mm_madd_epi16(u[4], k__cospi_p04_p28);

+  v[11] = _mm_madd_epi16(u[5], k__cospi_p04_p28);

+  v[12] = _mm_madd_epi16(u[6], k__cospi_m12_p20);

+  v[13] = _mm_madd_epi16(u[7], k__cospi_m12_p20);

+  v[14] = _mm_madd_epi16(u[6], k__cospi_p20_p12);

+  v[15] = _mm_madd_epi16(u[7], k__cospi_p20_p12);

+  u[0] = _mm_add_epi32(v[0], v[8]);

+  u[1] = _mm_add_epi32(v[1], v[9]);

+  u[2] = _mm_add_epi32(v[2], v[10]);

+  u[3] = _mm_add_epi32(v[3], v[11]);

+  u[4] = _mm_add_epi32(v[4], v[12]);

+  u[5] = _mm_add_epi32(v[5], v[13]);

+  u[6] = _mm_add_epi32(v[6], v[14]);

+  u[7] = _mm_add_epi32(v[7], v[15]);

+  u[8] = _mm_sub_epi32(v[0], v[8]);

+  u[9] = _mm_sub_epi32(v[1], v[9]);

+  u[10] = _mm_sub_epi32(v[2], v[10]);

+  u[11] = _mm_sub_epi32(v[3], v[11]);

+  u[12] = _mm_sub_epi32(v[4], v[12]);

+  u[13] = _mm_sub_epi32(v[5], v[13]);

+  u[14] = _mm_sub_epi32(v[6], v[14]);

+  u[15] = _mm_sub_epi32(v[7], v[15]);

+  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

+  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

+  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

+  v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

+  v[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);

+  v[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);

+  v[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);

+  v[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);

+  v[8] = _mm_add_epi32(u[8], k__DCT_CONST_ROUNDING);

+  v[9] = _mm_add_epi32(u[9], k__DCT_CONST_ROUNDING);

+  v[10] = _mm_add_epi32(u[10], k__DCT_CONST_ROUNDING);

+  v[11] = _mm_add_epi32(u[11], k__DCT_CONST_ROUNDING);

+  v[12] = _mm_add_epi32(u[12], k__DCT_CONST_ROUNDING);

+  v[13] = _mm_add_epi32(u[13], k__DCT_CONST_ROUNDING);

+  v[14] = _mm_add_epi32(u[14], k__DCT_CONST_ROUNDING);

+  v[15] = _mm_add_epi32(u[15], k__DCT_CONST_ROUNDING);

+  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

+  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

+  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

+  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);

+  u[4] = _mm_srai_epi32(v[4], DCT_CONST_BITS);

+  u[5] = _mm_srai_epi32(v[5], DCT_CONST_BITS);

+  u[6] = _mm_srai_epi32(v[6], DCT_CONST_BITS);

+  u[7] = _mm_srai_epi32(v[7], DCT_CONST_BITS);

+  u[8] = _mm_srai_epi32(v[8], DCT_CONST_BITS);

+  u[9] = _mm_srai_epi32(v[9], DCT_CONST_BITS);

+  u[10] = _mm_srai_epi32(v[10], DCT_CONST_BITS);

+  u[11] = _mm_srai_epi32(v[11], DCT_CONST_BITS);

+  u[12] = _mm_srai_epi32(v[12], DCT_CONST_BITS);

+  u[13] = _mm_srai_epi32(v[13], DCT_CONST_BITS);

+  u[14] = _mm_srai_epi32(v[14], DCT_CONST_BITS);

+  u[15] = _mm_srai_epi32(v[15], DCT_CONST_BITS);

+  x[0] = _mm_add_epi16(s[0], s[4]);

+  x[1] = _mm_add_epi16(s[1], s[5]);

+  x[2] = _mm_add_epi16(s[2], s[6]);

+  x[3] = _mm_add_epi16(s[3], s[7]);

+  x[4] = _mm_sub_epi16(s[0], s[4]);

+  x[5] = _mm_sub_epi16(s[1], s[5]);

+  x[6] = _mm_sub_epi16(s[2], s[6]);

+  x[7] = _mm_sub_epi16(s[3], s[7]);

+  x[8] = _mm_packs_epi32(u[0], u[1]);

+  x[9] = _mm_packs_epi32(u[2], u[3]);

+  x[10] = _mm_packs_epi32(u[4], u[5]);

+  x[11] = _mm_packs_epi32(u[6], u[7]);

+  x[12] = _mm_packs_epi32(u[8], u[9]);

+  x[13] = _mm_packs_epi32(u[10], u[11]);

+  x[14] = _mm_packs_epi32(u[12], u[13]);

+  x[15] = _mm_packs_epi32(u[14], u[15]);

+  // stage 3

+  u[0] = _mm_unpacklo_epi16(x[4], x[5]);

+  u[1] = _mm_unpackhi_epi16(x[4], x[5]);

+  u[2] = _mm_unpacklo_epi16(x[6], x[7]);

+  u[3] = _mm_unpackhi_epi16(x[6], x[7]);

+  u[4] = _mm_unpacklo_epi16(x[12], x[13]);

+  u[5] = _mm_unpackhi_epi16(x[12], x[13]);

+  u[6] = _mm_unpacklo_epi16(x[14], x[15]);

+  u[7] = _mm_unpackhi_epi16(x[14], x[15]);

+  v[0] = _mm_madd_epi16(u[0], k__cospi_p08_p24);

+  v[1] = _mm_madd_epi16(u[1], k__cospi_p08_p24);

+  v[2] = _mm_madd_epi16(u[0], k__cospi_p24_m08);

+  v[3] = _mm_madd_epi16(u[1], k__cospi_p24_m08);

+  v[4] = _mm_madd_epi16(u[2], k__cospi_m24_p08);

+  v[5] = _mm_madd_epi16(u[3], k__cospi_m24_p08);

+  v[6] = _mm_madd_epi16(u[2], k__cospi_p08_p24);

+  v[7] = _mm_madd_epi16(u[3], k__cospi_p08_p24);

+  v[8] = _mm_madd_epi16(u[4], k__cospi_p08_p24);

+  v[9] = _mm_madd_epi16(u[5], k__cospi_p08_p24);

+  v[10] = _mm_madd_epi16(u[4], k__cospi_p24_m08);

+  v[11] = _mm_madd_epi16(u[5], k__cospi_p24_m08);

+  v[12] = _mm_madd_epi16(u[6], k__cospi_m24_p08);

+  v[13] = _mm_madd_epi16(u[7], k__cospi_m24_p08);

+  v[14] = _mm_madd_epi16(u[6], k__cospi_p08_p24);

+  v[15] = _mm_madd_epi16(u[7], k__cospi_p08_p24);

+  u[0] = _mm_add_epi32(v[0], v[4]);

+  u[1] = _mm_add_epi32(v[1], v[5]);

+  u[2] = _mm_add_epi32(v[2], v[6]);

+  u[3] = _mm_add_epi32(v[3], v[7]);

+  u[4] = _mm_sub_epi32(v[0], v[4]);

+  u[5] = _mm_sub_epi32(v[1], v[5]);

+  u[6] = _mm_sub_epi32(v[2], v[6]);

+  u[7] = _mm_sub_epi32(v[3], v[7]);

+  u[8] = _mm_add_epi32(v[8], v[12]);

+  u[9] = _mm_add_epi32(v[9], v[13]);

+  u[10] = _mm_add_epi32(v[10], v[14]);

+  u[11] = _mm_add_epi32(v[11], v[15]);

+  u[12] = _mm_sub_epi32(v[8], v[12]);

+  u[13] = _mm_sub_epi32(v[9], v[13]);

+  u[14] = _mm_sub_epi32(v[10], v[14]);

+  u[15] = _mm_sub_epi32(v[11], v[15]);

+  u[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

+  u[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

+  u[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

+  u[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

+  u[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);

+  u[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);

+  u[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);

+  u[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);

+  u[8] = _mm_add_epi32(u[8], k__DCT_CONST_ROUNDING);

+  u[9] = _mm_add_epi32(u[9], k__DCT_CONST_ROUNDING);

+  u[10] = _mm_add_epi32(u[10], k__DCT_CONST_ROUNDING);

+  u[11] = _mm_add_epi32(u[11], k__DCT_CONST_ROUNDING);

+  u[12] = _mm_add_epi32(u[12], k__DCT_CONST_ROUNDING);

+  u[13] = _mm_add_epi32(u[13], k__DCT_CONST_ROUNDING);

+  u[14] = _mm_add_epi32(u[14], k__DCT_CONST_ROUNDING);

+  u[15] = _mm_add_epi32(u[15], k__DCT_CONST_ROUNDING);

+  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

+  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

+  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

+  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

+  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

+  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

+  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

+  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

+  v[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);

+  v[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);

+  v[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);

+  v[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);

+  v[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);

+  v[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);

+  v[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);

+  v[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);

+  s[0] = _mm_add_epi16(x[0], x[2]);

+  s[1] = _mm_add_epi16(x[1], x[3]);

+  s[2] = _mm_sub_epi16(x[0], x[2]);

+  s[3] = _mm_sub_epi16(x[1], x[3]);

+  s[4] = _mm_packs_epi32(v[0], v[1]);

+  s[5] = _mm_packs_epi32(v[2], v[3]);

+  s[6] = _mm_packs_epi32(v[4], v[5]);

+  s[7] = _mm_packs_epi32(v[6], v[7]);

+  s[8] = _mm_add_epi16(x[8], x[10]);

+  s[9] = _mm_add_epi16(x[9], x[11]);

+  s[10] = _mm_sub_epi16(x[8], x[10]);

+  s[11] = _mm_sub_epi16(x[9], x[11]);

+  s[12] = _mm_packs_epi32(v[8], v[9]);

+  s[13] = _mm_packs_epi32(v[10], v[11]);

+  s[14] = _mm_packs_epi32(v[12], v[13]);

+  s[15] = _mm_packs_epi32(v[14], v[15]);

+  // stage 4

+  u[0] = _mm_unpacklo_epi16(s[2], s[3]);

+  u[1] = _mm_unpackhi_epi16(s[2], s[3]);

+  u[2] = _mm_unpacklo_epi16(s[6], s[7]);

+  u[3] = _mm_unpackhi_epi16(s[6], s[7]);

+  u[4] = _mm_unpacklo_epi16(s[10], s[11]);

+  u[5] = _mm_unpackhi_epi16(s[10], s[11]);

+  u[6] = _mm_unpacklo_epi16(s[14], s[15]);

+  u[7] = _mm_unpackhi_epi16(s[14], s[15]);

+  v[0] = _mm_madd_epi16(u[0], k__cospi_m16_m16);

+  v[1] = _mm_madd_epi16(u[1], k__cospi_m16_m16);

+  v[2] = _mm_madd_epi16(u[0], k__cospi_p16_m16);

+  v[3] = _mm_madd_epi16(u[1], k__cospi_p16_m16);

+  v[4] = _mm_madd_epi16(u[2], k__cospi_p16_p16);

+  v[5] = _mm_madd_epi16(u[3], k__cospi_p16_p16);

+  v[6] = _mm_madd_epi16(u[2], k__cospi_m16_p16);

+  v[7] = _mm_madd_epi16(u[3], k__cospi_m16_p16);

+  v[8] = _mm_madd_epi16(u[4], k__cospi_p16_p16);

+  v[9] = _mm_madd_epi16(u[5], k__cospi_p16_p16);

+  v[10] = _mm_madd_epi16(u[4], k__cospi_m16_p16);

+  v[11] = _mm_madd_epi16(u[5], k__cospi_m16_p16);

+  v[12] = _mm_madd_epi16(u[6], k__cospi_m16_m16);

+  v[13] = _mm_madd_epi16(u[7], k__cospi_m16_m16);

+  v[14] = _mm_madd_epi16(u[6], k__cospi_p16_m16);

+  v[15] = _mm_madd_epi16(u[7], k__cospi_p16_m16);

+  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

+  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

+  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

+  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

+  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

+  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

+  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

+  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);

+  u[8] = _mm_add_epi32(v[8], k__DCT_CONST_ROUNDING);

+  u[9] = _mm_add_epi32(v[9], k__DCT_CONST_ROUNDING);

+  u[10] = _mm_add_epi32(v[10], k__DCT_CONST_ROUNDING);

+  u[11] = _mm_add_epi32(v[11], k__DCT_CONST_ROUNDING);

+  u[12] = _mm_add_epi32(v[12], k__DCT_CONST_ROUNDING);

+  u[13] = _mm_add_epi32(v[13], k__DCT_CONST_ROUNDING);

+  u[14] = _mm_add_epi32(v[14], k__DCT_CONST_ROUNDING);

+  u[15] = _mm_add_epi32(v[15], k__DCT_CONST_ROUNDING);

+  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

+  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

+  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

+  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

+  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

+  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

+  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

+  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

+  v[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);

+  v[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);

+  v[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);

+  v[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);

+  v[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);

+  v[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);

+  v[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);

+  v[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);

+  in[0] = s[0];

+  in[1] = _mm_sub_epi16(kZero, s[8]);

+  in[2] = s[12];

+  in[3] = _mm_sub_epi16(kZero, s[4]);

+  in[4] = _mm_packs_epi32(v[4], v[5]);

+  in[5] = _mm_packs_epi32(v[12], v[13]);

+  in[6] = _mm_packs_epi32(v[8], v[9]);

+  in[7] = _mm_packs_epi32(v[0], v[1]);

+  in[8] = _mm_packs_epi32(v[2], v[3]);

+  in[9] = _mm_packs_epi32(v[10], v[11]);

+  in[10] = _mm_packs_epi32(v[14], v[15]);

+  in[11] = _mm_packs_epi32(v[6], v[7]);

+  in[12] = s[5];

+  in[13] = _mm_sub_epi16(kZero, s[13]);

+  in[14] = s[9];

+  in[15] = _mm_sub_epi16(kZero, s[1]);

+}

+static void fdct16_sse2(__m128i *in0, __m128i *in1) {

+  fdct16_8col(in0);

+  fdct16_8col(in1);

+  array_transpose_16x16(in0, in1);

+}

+static void fadst16_sse2(__m128i *in0, __m128i *in1) {

+  fadst16_8col(in0);

+  fadst16_8col(in1);

+  array_transpose_16x16(in0, in1);

+}

+void vp10_fht16x16_sse2(const int16_t *input, tran_low_t *output,

+                       int stride, int tx_type) {

+  __m128i in0[16], in1[16];

+  switch (tx_type) {

+    case DCT_DCT:

+      vpx_fdct16x16_sse2(input, output, stride);

+      break;

+    case ADST_DCT:

+      load_buffer_16x16(input, in0, in1, stride);

+      fadst16_sse2(in0, in1);

+      right_shift_16x16(in0, in1);

+      fdct16_sse2(in0, in1);

+      write_buffer_16x16(output, in0, in1, 16);

+      break;

+    case DCT_ADST:

+      load_buffer_16x16(input, in0, in1, stride);

+      fdct16_sse2(in0, in1);

+      right_shift_16x16(in0, in1);

+      fadst16_sse2(in0, in1);

+      write_buffer_16x16(output, in0, in1, 16);

+      break;

+    case ADST_ADST:

+      load_buffer_16x16(input, in0, in1, stride);

+      fadst16_sse2(in0, in1);

+      right_shift_16x16(in0, in1);

+      fadst16_sse2(in0, in1);

+      write_buffer_16x16(output, in0, in1, 16);

+      break;

+    default:

+      assert(0);

+      break;

+  }

+}

--- a/vp10/encoder/x86/dct_mmx.asm

+++ /dev/null

@@ -1,104 +1,0 @@

-;

-;  Copyright (c) 2014 The WebM project authors. All Rights Reserved.

-;

-;  Use of this source code is governed by a BSD-style license

-;  that can be found in the LICENSE file in the root of the source

-;  tree. An additional intellectual property rights grant can be found

-;  in the file PATENTS.  All contributing project authors may

-;  be found in the AUTHORS file in the root of the source tree.

-;

-%define private_prefix vp10

-%include "third_party/x86inc/x86inc.asm"

-SECTION .text

-%macro TRANSFORM_COLS 0

-  paddw           m0,        m1

-  movq            m4,        m0

-  psubw           m3,        m2

-  psubw           m4,        m3

-  psraw           m4,        1

-  movq            m5,        m4

-  psubw           m5,        m1 ;b1

-  psubw           m4,        m2 ;c1

-  psubw           m0,        m4

-  paddw           m3,        m5

-                                ; m0 a0

-  SWAP            1,         4  ; m1 c1

-  SWAP            2,         3  ; m2 d1

-  SWAP            3,         5  ; m3 b1

-%endmacro

-%macro TRANSPOSE_4X4 0

-  movq            m4,        m0

-  movq            m5,        m2

-  punpcklwd       m4,        m1

-  punpckhwd       m0,        m1

-  punpcklwd       m5,        m3

-  punpckhwd       m2,        m3

-  movq            m1,        m4

-  movq            m3,        m0

-  punpckldq       m1,        m5

-  punpckhdq       m4,        m5

-  punpckldq       m3,        m2

-  punpckhdq       m0,        m2

-  SWAP            2, 3, 0, 1, 4

-%endmacro

-INIT_MMX mmx

-cglobal fwht4x4, 3, 4, 8, input, output, stride

-  lea             r3q,       [inputq + strideq*4]

-  movq            m0,        [inputq] ;a1

-  movq            m1,        [inputq + strideq*2] ;b1

-  movq            m2,        [r3q] ;c1

-  movq            m3,        [r3q + strideq*2] ;d1

-  TRANSFORM_COLS

-  TRANSPOSE_4X4

-  TRANSFORM_COLS

-  TRANSPOSE_4X4

-  psllw           m0,        2

-  psllw           m1,        2

-  psllw           m2,        2

-  psllw           m3,        2

-%if CONFIG_VP9_HIGHBITDEPTH

-  pxor            m4,             m4

-  pxor            m5,             m5

-  pcmpgtw         m4,             m0

-  pcmpgtw         m5,             m1

-  movq            m6,             m0

-  movq            m7,             m1

-  punpcklwd       m0,             m4

-  punpcklwd       m1,             m5

-  punpckhwd       m6,             m4

-  punpckhwd       m7,             m5

-  movq            [outputq],      m0

-  movq            [outputq + 8],  m6

-  movq            [outputq + 16], m1

-  movq            [outputq + 24], m7

-  pxor            m4,             m4

-  pxor            m5,             m5

-  pcmpgtw         m4,             m2

-  pcmpgtw         m5,             m3

-  movq            m6,             m2

-  movq            m7,             m3

-  punpcklwd       m2,             m4

-  punpcklwd       m3,             m5

-  punpckhwd       m6,             m4

-  punpckhwd       m7,             m5

-  movq            [outputq + 32], m2

-  movq            [outputq + 40], m6

-  movq            [outputq + 48], m3

-  movq            [outputq + 56], m7

-%else

-  movq            [outputq],      m0

-  movq            [outputq + 8],  m1

-  movq            [outputq + 16], m2

-  movq            [outputq + 24], m3

-%endif

-  RET

--- /dev/null

+++ b/vp10/encoder/x86/dct_sse2.asm

@@ -1,0 +1,86 @@

+;

+;  Copyright (c) 2016 The WebM project authors. All Rights Reserved.

+;

+;  Use of this source code is governed by a BSD-style license

+;  that can be found in the LICENSE file in the root of the source

+;  tree. An additional intellectual property rights grant can be found

+;  in the file PATENTS.  All contributing project authors may

+;  be found in the AUTHORS file in the root of the source tree.

+;

+%define private_prefix vp10

+%include "third_party/x86inc/x86inc.asm"

+SECTION .text

+%macro TRANSFORM_COLS 0

+  paddw           m0,        m1

+  movq            m4,        m0

+  psubw           m3,        m2

+  psubw           m4,        m3

+  psraw           m4,        1

+  movq            m5,        m4

+  psubw           m5,        m1 ;b1

+  psubw           m4,        m2 ;c1

+  psubw           m0,        m4

+  paddw           m3,        m5

+                                ; m0 a0

+  SWAP            1,         4  ; m1 c1

+  SWAP            2,         3  ; m2 d1

+  SWAP            3,         5  ; m3 b1

+%endmacro

+%macro TRANSPOSE_4X4 0

+                                ; 00 01 02 03

+                                ; 10 11 12 13

+                                ; 20 21 22 23

+                                ; 30 31 32 33

+  punpcklwd       m0,        m1 ; 00 10 01 11  02 12 03 13

+  punpcklwd       m2,        m3 ; 20 30 21 31  22 32 23 33

+  mova            m1,        m0

+  punpckldq       m0,        m2 ; 00 10 20 30  01 11 21 31

+  punpckhdq       m1,        m2 ; 02 12 22 32  03 13 23 33

+%endmacro

+INIT_XMM sse2

+cglobal fwht4x4, 3, 4, 8, input, output, stride

+  lea             r3q,       [inputq + strideq*4]

+  movq            m0,        [inputq] ;a1

+  movq            m1,        [inputq + strideq*2] ;b1

+  movq            m2,        [r3q] ;c1

+  movq            m3,        [r3q + strideq*2] ;d1

+  TRANSFORM_COLS

+  TRANSPOSE_4X4

+  SWAP            1,         2

+  psrldq          m1,        m0, 8

+  psrldq          m3,        m2, 8

+  TRANSFORM_COLS

+  TRANSPOSE_4X4

+  psllw           m0,        2

+  psllw           m1,        2

+%if CONFIG_VP9_HIGHBITDEPTH

+  ; sign extension

+  mova            m2,             m0

+  mova            m3,             m1

+  punpcklwd       m0,             m0

+  punpcklwd       m1,             m1

+  punpckhwd       m2,             m2

+  punpckhwd       m3,             m3

+  psrad           m0,             16

+  psrad           m1,             16

+  psrad           m2,             16

+  psrad           m3,             16

+  mova            [outputq],      m0

+  mova            [outputq + 16], m2

+  mova            [outputq + 32], m1

+  mova            [outputq + 48], m3

+%else

+  mova            [outputq],      m0

+  mova            [outputq + 16], m1

+%endif

+  RET

--- a/vp10/encoder/x86/dct_sse2.c

+++ /dev/null

@@ -1,2058 +1,0 @@

-/*

- *  Copyright (c) 2012 The WebM project authors. All Rights Reserved.

- *

- *  Use of this source code is governed by a BSD-style license

- *  that can be found in the LICENSE file in the root of the source

- *  tree. An additional intellectual property rights grant can be found

- *  in the file PATENTS.  All contributing project authors may

- *  be found in the AUTHORS file in the root of the source tree.

- */

-#include <assert.h>

-#include <emmintrin.h>  // SSE2

-#include "./vp10_rtcd.h"

-#include "./vpx_dsp_rtcd.h"

-#include "vpx_dsp/txfm_common.h"

-#include "vpx_dsp/x86/fwd_txfm_sse2.h"

-#include "vpx_dsp/x86/txfm_common_sse2.h"

-#include "vpx_ports/mem.h"

-static INLINE void load_buffer_4x4(const int16_t *input, __m128i *in,

-                                   int stride) {

-  const __m128i k__nonzero_bias_a = _mm_setr_epi16(0, 1, 1, 1, 1, 1, 1, 1);

-  const __m128i k__nonzero_bias_b = _mm_setr_epi16(1, 0, 0, 0, 0, 0, 0, 0);

-  __m128i mask;

-  in[0] = _mm_loadl_epi64((const __m128i *)(input + 0 * stride));

-  in[1] = _mm_loadl_epi64((const __m128i *)(input + 1 * stride));

-  in[2] = _mm_loadl_epi64((const __m128i *)(input + 2 * stride));

-  in[3] = _mm_loadl_epi64((const __m128i *)(input + 3 * stride));

-  in[0] = _mm_slli_epi16(in[0], 4);

-  in[1] = _mm_slli_epi16(in[1], 4);

-  in[2] = _mm_slli_epi16(in[2], 4);

-  in[3] = _mm_slli_epi16(in[3], 4);

-  mask = _mm_cmpeq_epi16(in[0], k__nonzero_bias_a);

-  in[0] = _mm_add_epi16(in[0], mask);

-  in[0] = _mm_add_epi16(in[0], k__nonzero_bias_b);

-}

-static INLINE void write_buffer_4x4(tran_low_t *output, __m128i *res) {

-  const __m128i kOne = _mm_set1_epi16(1);

-  __m128i in01 = _mm_unpacklo_epi64(res[0], res[1]);

-  __m128i in23 = _mm_unpacklo_epi64(res[2], res[3]);

-  __m128i out01 = _mm_add_epi16(in01, kOne);

-  __m128i out23 = _mm_add_epi16(in23, kOne);

-  out01 = _mm_srai_epi16(out01, 2);

-  out23 = _mm_srai_epi16(out23, 2);

-  store_output(&out01, (output + 0 * 8));

-  store_output(&out23, (output + 1 * 8));

-}

-static INLINE void transpose_4x4(__m128i *res) {

-  // Combine and transpose

-  // 00 01 02 03 20 21 22 23

-  // 10 11 12 13 30 31 32 33

-  const __m128i tr0_0 = _mm_unpacklo_epi16(res[0], res[1]);

-  const __m128i tr0_1 = _mm_unpackhi_epi16(res[0], res[1]);

-  // 00 10 01 11 02 12 03 13

-  // 20 30 21 31 22 32 23 33

-  res[0] = _mm_unpacklo_epi32(tr0_0, tr0_1);

-  res[2] = _mm_unpackhi_epi32(tr0_0, tr0_1);

-  // 00 10 20 30 01 11 21 31

-  // 02 12 22 32 03 13 23 33

-  // only use the first 4 16-bit integers

-  res[1] = _mm_unpackhi_epi64(res[0], res[0]);

-  res[3] = _mm_unpackhi_epi64(res[2], res[2]);

-}

-static void fdct4_sse2(__m128i *in) {

-  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

-  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

-  const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);

-  const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);

-  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

-  __m128i u[4], v[4];

-  u[0]=_mm_unpacklo_epi16(in[0], in[1]);

-  u[1]=_mm_unpacklo_epi16(in[3], in[2]);

-  v[0] = _mm_add_epi16(u[0], u[1]);

-  v[1] = _mm_sub_epi16(u[0], u[1]);

-  u[0] = _mm_madd_epi16(v[0], k__cospi_p16_p16);  // 0

-  u[1] = _mm_madd_epi16(v[0], k__cospi_p16_m16);  // 2

-  u[2] = _mm_madd_epi16(v[1], k__cospi_p08_p24);  // 1

-  u[3] = _mm_madd_epi16(v[1], k__cospi_p24_m08);  // 3

-  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

-  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

-  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

-  v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

-  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

-  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

-  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

-  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);

-  in[0] = _mm_packs_epi32(u[0], u[1]);

-  in[1] = _mm_packs_epi32(u[2], u[3]);

-  transpose_4x4(in);

-}

-static void fadst4_sse2(__m128i *in) {

-  const __m128i k__sinpi_p01_p02 = pair_set_epi16(sinpi_1_9, sinpi_2_9);

-  const __m128i k__sinpi_p04_m01 = pair_set_epi16(sinpi_4_9, -sinpi_1_9);

-  const __m128i k__sinpi_p03_p04 = pair_set_epi16(sinpi_3_9, sinpi_4_9);

-  const __m128i k__sinpi_m03_p02 = pair_set_epi16(-sinpi_3_9, sinpi_2_9);

-  const __m128i k__sinpi_p03_p03 = _mm_set1_epi16((int16_t)sinpi_3_9);

-  const __m128i kZero = _mm_set1_epi16(0);

-  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

-  __m128i u[8], v[8];

-  __m128i in7 = _mm_add_epi16(in[0], in[1]);

-  u[0] = _mm_unpacklo_epi16(in[0], in[1]);

-  u[1] = _mm_unpacklo_epi16(in[2], in[3]);

-  u[2] = _mm_unpacklo_epi16(in7, kZero);

-  u[3] = _mm_unpacklo_epi16(in[2], kZero);

-  u[4] = _mm_unpacklo_epi16(in[3], kZero);

-  v[0] = _mm_madd_epi16(u[0], k__sinpi_p01_p02);  // s0 + s2

-  v[1] = _mm_madd_epi16(u[1], k__sinpi_p03_p04);  // s4 + s5

-  v[2] = _mm_madd_epi16(u[2], k__sinpi_p03_p03);  // x1

-  v[3] = _mm_madd_epi16(u[0], k__sinpi_p04_m01);  // s1 - s3

-  v[4] = _mm_madd_epi16(u[1], k__sinpi_m03_p02);  // -s4 + s6

-  v[5] = _mm_madd_epi16(u[3], k__sinpi_p03_p03);  // s4

-  v[6] = _mm_madd_epi16(u[4], k__sinpi_p03_p03);

-  u[0] = _mm_add_epi32(v[0], v[1]);

-  u[1] = _mm_sub_epi32(v[2], v[6]);

-  u[2] = _mm_add_epi32(v[3], v[4]);

-  u[3] = _mm_sub_epi32(u[2], u[0]);

-  u[4] = _mm_slli_epi32(v[5], 2);

-  u[5] = _mm_sub_epi32(u[4], v[5]);

-  u[6] = _mm_add_epi32(u[3], u[5]);

-  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

-  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

-  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

-  v[3] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);

-  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

-  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

-  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

-  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);

-  in[0] = _mm_packs_epi32(u[0], u[2]);

-  in[1] = _mm_packs_epi32(u[1], u[3]);

-  transpose_4x4(in);

-}

-void vp10_fht4x4_sse2(const int16_t *input, tran_low_t *output,

-                     int stride, int tx_type) {

-  __m128i in[4];

-  switch (tx_type) {

-    case DCT_DCT:

-      vpx_fdct4x4_sse2(input, output, stride);

-      break;

-    case ADST_DCT:

-      load_buffer_4x4(input, in, stride);

-      fadst4_sse2(in);

-      fdct4_sse2(in);

-      write_buffer_4x4(output, in);

-      break;

-    case DCT_ADST:

-      load_buffer_4x4(input, in, stride);

-      fdct4_sse2(in);

-      fadst4_sse2(in);

-      write_buffer_4x4(output, in);

-      break;

-    case ADST_ADST:

-      load_buffer_4x4(input, in, stride);

-      fadst4_sse2(in);

-      fadst4_sse2(in);

-      write_buffer_4x4(output, in);

-      break;

-   default:

-     assert(0);

-     break;

-  }

-}

-void vp10_fdct8x8_quant_sse2(const int16_t *input, int stride,

-                            int16_t* coeff_ptr, intptr_t n_coeffs,

-                            int skip_block, const int16_t* zbin_ptr,

-                            const int16_t* round_ptr, const int16_t* quant_ptr,

-                            const int16_t* quant_shift_ptr, int16_t* qcoeff_ptr,

-                            int16_t* dqcoeff_ptr, const int16_t* dequant_ptr,

-                            uint16_t* eob_ptr,

-                            const int16_t* scan_ptr,

-                            const int16_t* iscan_ptr) {

-  __m128i zero;

-  int pass;

-  // Constants

-  //    When we use them, in one case, they are all the same. In all others

-  //    it's a pair of them that we need to repeat four times. This is done

-  //    by constructing the 32 bit constant corresponding to that pair.

-  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

-  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

-  const __m128i k__cospi_p24_p08 = pair_set_epi16(cospi_24_64, cospi_8_64);

-  const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64, cospi_24_64);

-  const __m128i k__cospi_p28_p04 = pair_set_epi16(cospi_28_64, cospi_4_64);

-  const __m128i k__cospi_m04_p28 = pair_set_epi16(-cospi_4_64, cospi_28_64);

-  const __m128i k__cospi_p12_p20 = pair_set_epi16(cospi_12_64, cospi_20_64);

-  const __m128i k__cospi_m20_p12 = pair_set_epi16(-cospi_20_64, cospi_12_64);

-  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

-  // Load input

-  __m128i in0  = _mm_load_si128((const __m128i *)(input + 0 * stride));

-  __m128i in1  = _mm_load_si128((const __m128i *)(input + 1 * stride));

-  __m128i in2  = _mm_load_si128((const __m128i *)(input + 2 * stride));

-  __m128i in3  = _mm_load_si128((const __m128i *)(input + 3 * stride));

-  __m128i in4  = _mm_load_si128((const __m128i *)(input + 4 * stride));

-  __m128i in5  = _mm_load_si128((const __m128i *)(input + 5 * stride));

-  __m128i in6  = _mm_load_si128((const __m128i *)(input + 6 * stride));

-  __m128i in7  = _mm_load_si128((const __m128i *)(input + 7 * stride));

-  __m128i *in[8];

-  int index = 0;

-  (void)scan_ptr;

-  (void)zbin_ptr;

-  (void)quant_shift_ptr;

-  (void)coeff_ptr;

-  // Pre-condition input (shift by two)

-  in0 = _mm_slli_epi16(in0, 2);

-  in1 = _mm_slli_epi16(in1, 2);

-  in2 = _mm_slli_epi16(in2, 2);

-  in3 = _mm_slli_epi16(in3, 2);

-  in4 = _mm_slli_epi16(in4, 2);

-  in5 = _mm_slli_epi16(in5, 2);

-  in6 = _mm_slli_epi16(in6, 2);

-  in7 = _mm_slli_epi16(in7, 2);

-  in[0] = &in0;

-  in[1] = &in1;

-  in[2] = &in2;

-  in[3] = &in3;

-  in[4] = &in4;

-  in[5] = &in5;

-  in[6] = &in6;

-  in[7] = &in7;

-  // We do two passes, first the columns, then the rows. The results of the

-  // first pass are transposed so that the same column code can be reused. The

-  // results of the second pass are also transposed so that the rows (processed

-  // as columns) are put back in row positions.

-  for (pass = 0; pass < 2; pass++) {

-    // To store results of each pass before the transpose.

-    __m128i res0, res1, res2, res3, res4, res5, res6, res7;

-    // Add/subtract

-    const __m128i q0 = _mm_add_epi16(in0, in7);

-    const __m128i q1 = _mm_add_epi16(in1, in6);

-    const __m128i q2 = _mm_add_epi16(in2, in5);

-    const __m128i q3 = _mm_add_epi16(in3, in4);

-    const __m128i q4 = _mm_sub_epi16(in3, in4);

-    const __m128i q5 = _mm_sub_epi16(in2, in5);

-    const __m128i q6 = _mm_sub_epi16(in1, in6);

-    const __m128i q7 = _mm_sub_epi16(in0, in7);

-    // Work on first four results

-    {

-      // Add/subtract

-      const __m128i r0 = _mm_add_epi16(q0, q3);

-      const __m128i r1 = _mm_add_epi16(q1, q2);

-      const __m128i r2 = _mm_sub_epi16(q1, q2);

-      const __m128i r3 = _mm_sub_epi16(q0, q3);

-      // Interleave to do the multiply by constants which gets us into 32bits

-      const __m128i t0 = _mm_unpacklo_epi16(r0, r1);

-      const __m128i t1 = _mm_unpackhi_epi16(r0, r1);

-      const __m128i t2 = _mm_unpacklo_epi16(r2, r3);

-      const __m128i t3 = _mm_unpackhi_epi16(r2, r3);

-      const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p16_p16);

-      const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p16_p16);

-      const __m128i u2 = _mm_madd_epi16(t0, k__cospi_p16_m16);

-      const __m128i u3 = _mm_madd_epi16(t1, k__cospi_p16_m16);

-      const __m128i u4 = _mm_madd_epi16(t2, k__cospi_p24_p08);

-      const __m128i u5 = _mm_madd_epi16(t3, k__cospi_p24_p08);

-      const __m128i u6 = _mm_madd_epi16(t2, k__cospi_m08_p24);

-      const __m128i u7 = _mm_madd_epi16(t3, k__cospi_m08_p24);

-      // dct_const_round_shift

-      const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);

-      const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);

-      const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);

-      const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);

-      const __m128i v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);

-      const __m128i v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING);

-      const __m128i v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);

-      const __m128i v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING);

-      const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

-      const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

-      const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

-      const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

-      const __m128i w4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

-      const __m128i w5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

-      const __m128i w6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

-      const __m128i w7 = _mm_srai_epi32(v7, DCT_CONST_BITS);

-      // Combine

-      res0 = _mm_packs_epi32(w0, w1);

-      res4 = _mm_packs_epi32(w2, w3);

-      res2 = _mm_packs_epi32(w4, w5);

-      res6 = _mm_packs_epi32(w6, w7);

-    }

-    // Work on next four results

-    {

-      // Interleave to do the multiply by constants which gets us into 32bits

-      const __m128i d0 = _mm_unpacklo_epi16(q6, q5);

-      const __m128i d1 = _mm_unpackhi_epi16(q6, q5);

-      const __m128i e0 = _mm_madd_epi16(d0, k__cospi_p16_m16);

-      const __m128i e1 = _mm_madd_epi16(d1, k__cospi_p16_m16);

-      const __m128i e2 = _mm_madd_epi16(d0, k__cospi_p16_p16);

-      const __m128i e3 = _mm_madd_epi16(d1, k__cospi_p16_p16);

-      // dct_const_round_shift

-      const __m128i f0 = _mm_add_epi32(e0, k__DCT_CONST_ROUNDING);

-      const __m128i f1 = _mm_add_epi32(e1, k__DCT_CONST_ROUNDING);

-      const __m128i f2 = _mm_add_epi32(e2, k__DCT_CONST_ROUNDING);

-      const __m128i f3 = _mm_add_epi32(e3, k__DCT_CONST_ROUNDING);

-      const __m128i s0 = _mm_srai_epi32(f0, DCT_CONST_BITS);

-      const __m128i s1 = _mm_srai_epi32(f1, DCT_CONST_BITS);

-      const __m128i s2 = _mm_srai_epi32(f2, DCT_CONST_BITS);

-      const __m128i s3 = _mm_srai_epi32(f3, DCT_CONST_BITS);

-      // Combine

-      const __m128i r0 = _mm_packs_epi32(s0, s1);

-      const __m128i r1 = _mm_packs_epi32(s2, s3);

-      // Add/subtract

-      const __m128i x0 = _mm_add_epi16(q4, r0);

-      const __m128i x1 = _mm_sub_epi16(q4, r0);

-      const __m128i x2 = _mm_sub_epi16(q7, r1);

-      const __m128i x3 = _mm_add_epi16(q7, r1);

-      // Interleave to do the multiply by constants which gets us into 32bits

-      const __m128i t0 = _mm_unpacklo_epi16(x0, x3);

-      const __m128i t1 = _mm_unpackhi_epi16(x0, x3);

-      const __m128i t2 = _mm_unpacklo_epi16(x1, x2);

-      const __m128i t3 = _mm_unpackhi_epi16(x1, x2);

-      const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p28_p04);

-      const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p28_p04);

-      const __m128i u2 = _mm_madd_epi16(t0, k__cospi_m04_p28);

-      const __m128i u3 = _mm_madd_epi16(t1, k__cospi_m04_p28);

-      const __m128i u4 = _mm_madd_epi16(t2, k__cospi_p12_p20);

-      const __m128i u5 = _mm_madd_epi16(t3, k__cospi_p12_p20);

-      const __m128i u6 = _mm_madd_epi16(t2, k__cospi_m20_p12);

-      const __m128i u7 = _mm_madd_epi16(t3, k__cospi_m20_p12);

-      // dct_const_round_shift

-      const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);

-      const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);

-      const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);

-      const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);

-      const __m128i v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);

-      const __m128i v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING);

-      const __m128i v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);

-      const __m128i v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING);

-      const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

-      const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

-      const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

-      const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

-      const __m128i w4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

-      const __m128i w5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

-      const __m128i w6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

-      const __m128i w7 = _mm_srai_epi32(v7, DCT_CONST_BITS);

-      // Combine

-      res1 = _mm_packs_epi32(w0, w1);

-      res7 = _mm_packs_epi32(w2, w3);

-      res5 = _mm_packs_epi32(w4, w5);

-      res3 = _mm_packs_epi32(w6, w7);

-    }

-    // Transpose the 8x8.

-    {

-      // 00 01 02 03 04 05 06 07

-      // 10 11 12 13 14 15 16 17

-      // 20 21 22 23 24 25 26 27

-      // 30 31 32 33 34 35 36 37

-      // 40 41 42 43 44 45 46 47

-      // 50 51 52 53 54 55 56 57

-      // 60 61 62 63 64 65 66 67

-      // 70 71 72 73 74 75 76 77

-      const __m128i tr0_0 = _mm_unpacklo_epi16(res0, res1);

-      const __m128i tr0_1 = _mm_unpacklo_epi16(res2, res3);

-      const __m128i tr0_2 = _mm_unpackhi_epi16(res0, res1);

-      const __m128i tr0_3 = _mm_unpackhi_epi16(res2, res3);

-      const __m128i tr0_4 = _mm_unpacklo_epi16(res4, res5);

-      const __m128i tr0_5 = _mm_unpacklo_epi16(res6, res7);

-      const __m128i tr0_6 = _mm_unpackhi_epi16(res4, res5);

-      const __m128i tr0_7 = _mm_unpackhi_epi16(res6, res7);

-      // 00 10 01 11 02 12 03 13

-      // 20 30 21 31 22 32 23 33

-      // 04 14 05 15 06 16 07 17

-      // 24 34 25 35 26 36 27 37

-      // 40 50 41 51 42 52 43 53

-      // 60 70 61 71 62 72 63 73

-      // 54 54 55 55 56 56 57 57

-      // 64 74 65 75 66 76 67 77

-      const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1);

-      const __m128i tr1_1 = _mm_unpacklo_epi32(tr0_2, tr0_3);

-      const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1);

-      const __m128i tr1_3 = _mm_unpackhi_epi32(tr0_2, tr0_3);

-      const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_4, tr0_5);

-      const __m128i tr1_5 = _mm_unpacklo_epi32(tr0_6, tr0_7);

-      const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_4, tr0_5);

-      const __m128i tr1_7 = _mm_unpackhi_epi32(tr0_6, tr0_7);

-      // 00 10 20 30 01 11 21 31

-      // 40 50 60 70 41 51 61 71

-      // 02 12 22 32 03 13 23 33

-      // 42 52 62 72 43 53 63 73

-      // 04 14 24 34 05 15 21 36

-      // 44 54 64 74 45 55 61 76

-      // 06 16 26 36 07 17 27 37

-      // 46 56 66 76 47 57 67 77

-      in0 = _mm_unpacklo_epi64(tr1_0, tr1_4);

-      in1 = _mm_unpackhi_epi64(tr1_0, tr1_4);

-      in2 = _mm_unpacklo_epi64(tr1_2, tr1_6);

-      in3 = _mm_unpackhi_epi64(tr1_2, tr1_6);

-      in4 = _mm_unpacklo_epi64(tr1_1, tr1_5);

-      in5 = _mm_unpackhi_epi64(tr1_1, tr1_5);

-      in6 = _mm_unpacklo_epi64(tr1_3, tr1_7);

-      in7 = _mm_unpackhi_epi64(tr1_3, tr1_7);

-      // 00 10 20 30 40 50 60 70

-      // 01 11 21 31 41 51 61 71

-      // 02 12 22 32 42 52 62 72

-      // 03 13 23 33 43 53 63 73

-      // 04 14 24 34 44 54 64 74

-      // 05 15 25 35 45 55 65 75

-      // 06 16 26 36 46 56 66 76

-      // 07 17 27 37 47 57 67 77

-    }

-  }

-  // Post-condition output and store it

-  {

-    // Post-condition (division by two)

-    //    division of two 16 bits signed numbers using shifts

-    //    n / 2 = (n - (n >> 15)) >> 1

-    const __m128i sign_in0 = _mm_srai_epi16(in0, 15);

-    const __m128i sign_in1 = _mm_srai_epi16(in1, 15);

-    const __m128i sign_in2 = _mm_srai_epi16(in2, 15);

-    const __m128i sign_in3 = _mm_srai_epi16(in3, 15);

-    const __m128i sign_in4 = _mm_srai_epi16(in4, 15);

-    const __m128i sign_in5 = _mm_srai_epi16(in5, 15);

-    const __m128i sign_in6 = _mm_srai_epi16(in6, 15);

-    const __m128i sign_in7 = _mm_srai_epi16(in7, 15);

-    in0 = _mm_sub_epi16(in0, sign_in0);

-    in1 = _mm_sub_epi16(in1, sign_in1);

-    in2 = _mm_sub_epi16(in2, sign_in2);

-    in3 = _mm_sub_epi16(in3, sign_in3);

-    in4 = _mm_sub_epi16(in4, sign_in4);

-    in5 = _mm_sub_epi16(in5, sign_in5);

-    in6 = _mm_sub_epi16(in6, sign_in6);

-    in7 = _mm_sub_epi16(in7, sign_in7);

-    in0 = _mm_srai_epi16(in0, 1);

-    in1 = _mm_srai_epi16(in1, 1);

-    in2 = _mm_srai_epi16(in2, 1);

-    in3 = _mm_srai_epi16(in3, 1);

-    in4 = _mm_srai_epi16(in4, 1);

-    in5 = _mm_srai_epi16(in5, 1);

-    in6 = _mm_srai_epi16(in6, 1);

-    in7 = _mm_srai_epi16(in7, 1);

-  }

-  iscan_ptr += n_coeffs;

-  qcoeff_ptr += n_coeffs;

-  dqcoeff_ptr += n_coeffs;

-  n_coeffs = -n_coeffs;

-  zero = _mm_setzero_si128();

-  if (!skip_block) {

-    __m128i eob;

-    __m128i round, quant, dequant;

-    {

-      __m128i coeff0, coeff1;

-      // Setup global values

-      {

-        round = _mm_load_si128((const __m128i*)round_ptr);

-        quant = _mm_load_si128((const __m128i*)quant_ptr);

-        dequant = _mm_load_si128((const __m128i*)dequant_ptr);

-      }

-      {

-        __m128i coeff0_sign, coeff1_sign;

-        __m128i qcoeff0, qcoeff1;

-        __m128i qtmp0, qtmp1;

-        // Do DC and first 15 AC

-        coeff0 = *in[0];

-        coeff1 = *in[1];

-        // Poor man's sign extract

-        coeff0_sign = _mm_srai_epi16(coeff0, 15);

-        coeff1_sign = _mm_srai_epi16(coeff1, 15);

-        qcoeff0 = _mm_xor_si128(coeff0, coeff0_sign);

-        qcoeff1 = _mm_xor_si128(coeff1, coeff1_sign);

-        qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);

-        qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);

-        qcoeff0 = _mm_adds_epi16(qcoeff0, round);

-        round = _mm_unpackhi_epi64(round, round);

-        qcoeff1 = _mm_adds_epi16(qcoeff1, round);

-        qtmp0 = _mm_mulhi_epi16(qcoeff0, quant);

-        quant = _mm_unpackhi_epi64(quant, quant);

-        qtmp1 = _mm_mulhi_epi16(qcoeff1, quant);

-        // Reinsert signs

-        qcoeff0 = _mm_xor_si128(qtmp0, coeff0_sign);

-        qcoeff1 = _mm_xor_si128(qtmp1, coeff1_sign);

-        qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);

-        qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);

-        _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), qcoeff0);

-        _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, qcoeff1);

-        coeff0 = _mm_mullo_epi16(qcoeff0, dequant);

-        dequant = _mm_unpackhi_epi64(dequant, dequant);

-        coeff1 = _mm_mullo_epi16(qcoeff1, dequant);

-        _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), coeff0);

-        _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, coeff1);

-      }

-      {

-        // Scan for eob

-        __m128i zero_coeff0, zero_coeff1;

-        __m128i nzero_coeff0, nzero_coeff1;

-        __m128i iscan0, iscan1;

-        __m128i eob1;

-        zero_coeff0 = _mm_cmpeq_epi16(coeff0, zero);

-        zero_coeff1 = _mm_cmpeq_epi16(coeff1, zero);

-        nzero_coeff0 = _mm_cmpeq_epi16(zero_coeff0, zero);

-        nzero_coeff1 = _mm_cmpeq_epi16(zero_coeff1, zero);

-        iscan0 = _mm_load_si128((const __m128i*)(iscan_ptr + n_coeffs));

-        iscan1 = _mm_load_si128((const __m128i*)(iscan_ptr + n_coeffs) + 1);

-        // Add one to convert from indices to counts

-        iscan0 = _mm_sub_epi16(iscan0, nzero_coeff0);

-        iscan1 = _mm_sub_epi16(iscan1, nzero_coeff1);

-        eob = _mm_and_si128(iscan0, nzero_coeff0);

-        eob1 = _mm_and_si128(iscan1, nzero_coeff1);

-        eob = _mm_max_epi16(eob, eob1);

-      }

-      n_coeffs += 8 * 2;

-    }

-    // AC only loop

-    index = 2;

-    while (n_coeffs < 0) {

-      __m128i coeff0, coeff1;

-      {

-        __m128i coeff0_sign, coeff1_sign;

-        __m128i qcoeff0, qcoeff1;

-        __m128i qtmp0, qtmp1;

-        assert(index < (int)(sizeof(in) / sizeof(in[0])) - 1);

-        coeff0 = *in[index];

-        coeff1 = *in[index + 1];

-        // Poor man's sign extract

-        coeff0_sign = _mm_srai_epi16(coeff0, 15);

-        coeff1_sign = _mm_srai_epi16(coeff1, 15);

-        qcoeff0 = _mm_xor_si128(coeff0, coeff0_sign);

-        qcoeff1 = _mm_xor_si128(coeff1, coeff1_sign);

-        qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);

-        qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);

-        qcoeff0 = _mm_adds_epi16(qcoeff0, round);

-        qcoeff1 = _mm_adds_epi16(qcoeff1, round);

-        qtmp0 = _mm_mulhi_epi16(qcoeff0, quant);

-        qtmp1 = _mm_mulhi_epi16(qcoeff1, quant);

-        // Reinsert signs

-        qcoeff0 = _mm_xor_si128(qtmp0, coeff0_sign);

-        qcoeff1 = _mm_xor_si128(qtmp1, coeff1_sign);

-        qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);

-        qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);

-        _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), qcoeff0);

-        _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, qcoeff1);

-        coeff0 = _mm_mullo_epi16(qcoeff0, dequant);

-        coeff1 = _mm_mullo_epi16(qcoeff1, dequant);

-        _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), coeff0);

-        _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, coeff1);

-      }

-      {

-        // Scan for eob

-        __m128i zero_coeff0, zero_coeff1;

-        __m128i nzero_coeff0, nzero_coeff1;

-        __m128i iscan0, iscan1;

-        __m128i eob0, eob1;

-        zero_coeff0 = _mm_cmpeq_epi16(coeff0, zero);

-        zero_coeff1 = _mm_cmpeq_epi16(coeff1, zero);

-        nzero_coeff0 = _mm_cmpeq_epi16(zero_coeff0, zero);

-        nzero_coeff1 = _mm_cmpeq_epi16(zero_coeff1, zero);

-        iscan0 = _mm_load_si128((const __m128i*)(iscan_ptr + n_coeffs));

-        iscan1 = _mm_load_si128((const __m128i*)(iscan_ptr + n_coeffs) + 1);

-        // Add one to convert from indices to counts

-        iscan0 = _mm_sub_epi16(iscan0, nzero_coeff0);

-        iscan1 = _mm_sub_epi16(iscan1, nzero_coeff1);

-        eob0 = _mm_and_si128(iscan0, nzero_coeff0);

-        eob1 = _mm_and_si128(iscan1, nzero_coeff1);

-        eob0 = _mm_max_epi16(eob0, eob1);

-        eob = _mm_max_epi16(eob, eob0);

-      }

-      n_coeffs += 8 * 2;

-      index += 2;

-    }

-    // Accumulate EOB

-    {

-      __m128i eob_shuffled;

-      eob_shuffled = _mm_shuffle_epi32(eob, 0xe);

-      eob = _mm_max_epi16(eob, eob_shuffled);

-      eob_shuffled = _mm_shufflelo_epi16(eob, 0xe);

-      eob = _mm_max_epi16(eob, eob_shuffled);

-      eob_shuffled = _mm_shufflelo_epi16(eob, 0x1);

-      eob = _mm_max_epi16(eob, eob_shuffled);

-      *eob_ptr = _mm_extract_epi16(eob, 1);

-    }

-  } else {

-    do {

-      _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), zero);

-      _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, zero);

-      _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), zero);

-      _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, zero);

-      n_coeffs += 8 * 2;

-    } while (n_coeffs < 0);

-    *eob_ptr = 0;

-  }

-}

-// load 8x8 array

-static INLINE void load_buffer_8x8(const int16_t *input, __m128i *in,

-                                   int stride) {

-  in[0]  = _mm_load_si128((const __m128i *)(input + 0 * stride));

-  in[1]  = _mm_load_si128((const __m128i *)(input + 1 * stride));

-  in[2]  = _mm_load_si128((const __m128i *)(input + 2 * stride));

-  in[3]  = _mm_load_si128((const __m128i *)(input + 3 * stride));

-  in[4]  = _mm_load_si128((const __m128i *)(input + 4 * stride));

-  in[5]  = _mm_load_si128((const __m128i *)(input + 5 * stride));

-  in[6]  = _mm_load_si128((const __m128i *)(input + 6 * stride));

-  in[7]  = _mm_load_si128((const __m128i *)(input + 7 * stride));

-  in[0] = _mm_slli_epi16(in[0], 2);

-  in[1] = _mm_slli_epi16(in[1], 2);

-  in[2] = _mm_slli_epi16(in[2], 2);

-  in[3] = _mm_slli_epi16(in[3], 2);

-  in[4] = _mm_slli_epi16(in[4], 2);

-  in[5] = _mm_slli_epi16(in[5], 2);

-  in[6] = _mm_slli_epi16(in[6], 2);

-  in[7] = _mm_slli_epi16(in[7], 2);

-}

-// right shift and rounding

-static INLINE void right_shift_8x8(__m128i *res, const int bit) {

-  __m128i sign0 = _mm_srai_epi16(res[0], 15);

-  __m128i sign1 = _mm_srai_epi16(res[1], 15);

-  __m128i sign2 = _mm_srai_epi16(res[2], 15);

-  __m128i sign3 = _mm_srai_epi16(res[3], 15);

-  __m128i sign4 = _mm_srai_epi16(res[4], 15);

-  __m128i sign5 = _mm_srai_epi16(res[5], 15);

-  __m128i sign6 = _mm_srai_epi16(res[6], 15);

-  __m128i sign7 = _mm_srai_epi16(res[7], 15);

-  if (bit == 2) {

-    const __m128i const_rounding = _mm_set1_epi16(1);

-    res[0] = _mm_add_epi16(res[0], const_rounding);

-    res[1] = _mm_add_epi16(res[1], const_rounding);

-    res[2] = _mm_add_epi16(res[2], const_rounding);

-    res[3] = _mm_add_epi16(res[3], const_rounding);

-    res[4] = _mm_add_epi16(res[4], const_rounding);

-    res[5] = _mm_add_epi16(res[5], const_rounding);

-    res[6] = _mm_add_epi16(res[6], const_rounding);

-    res[7] = _mm_add_epi16(res[7], const_rounding);

-  }

-  res[0] = _mm_sub_epi16(res[0], sign0);

-  res[1] = _mm_sub_epi16(res[1], sign1);

-  res[2] = _mm_sub_epi16(res[2], sign2);

-  res[3] = _mm_sub_epi16(res[3], sign3);

-  res[4] = _mm_sub_epi16(res[4], sign4);

-  res[5] = _mm_sub_epi16(res[5], sign5);

-  res[6] = _mm_sub_epi16(res[6], sign6);

-  res[7] = _mm_sub_epi16(res[7], sign7);

-  if (bit == 1) {

-    res[0] = _mm_srai_epi16(res[0], 1);

-    res[1] = _mm_srai_epi16(res[1], 1);

-    res[2] = _mm_srai_epi16(res[2], 1);

-    res[3] = _mm_srai_epi16(res[3], 1);

-    res[4] = _mm_srai_epi16(res[4], 1);

-    res[5] = _mm_srai_epi16(res[5], 1);

-    res[6] = _mm_srai_epi16(res[6], 1);

-    res[7] = _mm_srai_epi16(res[7], 1);

-  } else {

-    res[0] = _mm_srai_epi16(res[0], 2);

-    res[1] = _mm_srai_epi16(res[1], 2);

-    res[2] = _mm_srai_epi16(res[2], 2);

-    res[3] = _mm_srai_epi16(res[3], 2);

-    res[4] = _mm_srai_epi16(res[4], 2);

-    res[5] = _mm_srai_epi16(res[5], 2);

-    res[6] = _mm_srai_epi16(res[6], 2);

-    res[7] = _mm_srai_epi16(res[7], 2);

-  }

-}

-// write 8x8 array

-static INLINE void write_buffer_8x8(tran_low_t *output, __m128i *res,

-                                    int stride) {

-  store_output(&res[0], (output + 0 * stride));

-  store_output(&res[1], (output + 1 * stride));

-  store_output(&res[2], (output + 2 * stride));

-  store_output(&res[3], (output + 3 * stride));

-  store_output(&res[4], (output + 4 * stride));

-  store_output(&res[5], (output + 5 * stride));

-  store_output(&res[6], (output + 6 * stride));

-  store_output(&res[7], (output + 7 * stride));

-}

-// perform in-place transpose

-static INLINE void array_transpose_8x8(__m128i *in, __m128i *res) {

-  const __m128i tr0_0 = _mm_unpacklo_epi16(in[0], in[1]);

-  const __m128i tr0_1 = _mm_unpacklo_epi16(in[2], in[3]);

-  const __m128i tr0_2 = _mm_unpackhi_epi16(in[0], in[1]);

-  const __m128i tr0_3 = _mm_unpackhi_epi16(in[2], in[3]);

-  const __m128i tr0_4 = _mm_unpacklo_epi16(in[4], in[5]);

-  const __m128i tr0_5 = _mm_unpacklo_epi16(in[6], in[7]);

-  const __m128i tr0_6 = _mm_unpackhi_epi16(in[4], in[5]);

-  const __m128i tr0_7 = _mm_unpackhi_epi16(in[6], in[7]);

-  // 00 10 01 11 02 12 03 13

-  // 20 30 21 31 22 32 23 33

-  // 04 14 05 15 06 16 07 17

-  // 24 34 25 35 26 36 27 37

-  // 40 50 41 51 42 52 43 53

-  // 60 70 61 71 62 72 63 73

-  // 44 54 45 55 46 56 47 57

-  // 64 74 65 75 66 76 67 77

-  const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1);

-  const __m128i tr1_1 = _mm_unpacklo_epi32(tr0_4, tr0_5);

-  const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1);

-  const __m128i tr1_3 = _mm_unpackhi_epi32(tr0_4, tr0_5);

-  const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_2, tr0_3);

-  const __m128i tr1_5 = _mm_unpacklo_epi32(tr0_6, tr0_7);

-  const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_2, tr0_3);

-  const __m128i tr1_7 = _mm_unpackhi_epi32(tr0_6, tr0_7);

-  // 00 10 20 30 01 11 21 31

-  // 40 50 60 70 41 51 61 71

-  // 02 12 22 32 03 13 23 33

-  // 42 52 62 72 43 53 63 73

-  // 04 14 24 34 05 15 25 35

-  // 44 54 64 74 45 55 65 75

-  // 06 16 26 36 07 17 27 37

-  // 46 56 66 76 47 57 67 77

-  res[0] = _mm_unpacklo_epi64(tr1_0, tr1_1);

-  res[1] = _mm_unpackhi_epi64(tr1_0, tr1_1);

-  res[2] = _mm_unpacklo_epi64(tr1_2, tr1_3);

-  res[3] = _mm_unpackhi_epi64(tr1_2, tr1_3);

-  res[4] = _mm_unpacklo_epi64(tr1_4, tr1_5);

-  res[5] = _mm_unpackhi_epi64(tr1_4, tr1_5);

-  res[6] = _mm_unpacklo_epi64(tr1_6, tr1_7);

-  res[7] = _mm_unpackhi_epi64(tr1_6, tr1_7);

-  // 00 10 20 30 40 50 60 70

-  // 01 11 21 31 41 51 61 71

-  // 02 12 22 32 42 52 62 72

-  // 03 13 23 33 43 53 63 73

-  // 04 14 24 34 44 54 64 74

-  // 05 15 25 35 45 55 65 75

-  // 06 16 26 36 46 56 66 76

-  // 07 17 27 37 47 57 67 77

-}

-static void fdct8_sse2(__m128i *in) {

-  // constants

-  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

-  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

-  const __m128i k__cospi_p24_p08 = pair_set_epi16(cospi_24_64, cospi_8_64);

-  const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64, cospi_24_64);

-  const __m128i k__cospi_p28_p04 = pair_set_epi16(cospi_28_64, cospi_4_64);

-  const __m128i k__cospi_m04_p28 = pair_set_epi16(-cospi_4_64, cospi_28_64);

-  const __m128i k__cospi_p12_p20 = pair_set_epi16(cospi_12_64, cospi_20_64);

-  const __m128i k__cospi_m20_p12 = pair_set_epi16(-cospi_20_64, cospi_12_64);

-  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

-  __m128i u0, u1, u2, u3, u4, u5, u6, u7;

-  __m128i v0, v1, v2, v3, v4, v5, v6, v7;

-  __m128i s0, s1, s2, s3, s4, s5, s6, s7;

-  // stage 1

-  s0 = _mm_add_epi16(in[0], in[7]);

-  s1 = _mm_add_epi16(in[1], in[6]);

-  s2 = _mm_add_epi16(in[2], in[5]);

-  s3 = _mm_add_epi16(in[3], in[4]);

-  s4 = _mm_sub_epi16(in[3], in[4]);

-  s5 = _mm_sub_epi16(in[2], in[5]);

-  s6 = _mm_sub_epi16(in[1], in[6]);

-  s7 = _mm_sub_epi16(in[0], in[7]);

-  u0 = _mm_add_epi16(s0, s3);

-  u1 = _mm_add_epi16(s1, s2);

-  u2 = _mm_sub_epi16(s1, s2);

-  u3 = _mm_sub_epi16(s0, s3);

-  // interleave and perform butterfly multiplication/addition

-  v0 = _mm_unpacklo_epi16(u0, u1);

-  v1 = _mm_unpackhi_epi16(u0, u1);

-  v2 = _mm_unpacklo_epi16(u2, u3);

-  v3 = _mm_unpackhi_epi16(u2, u3);

-  u0 = _mm_madd_epi16(v0, k__cospi_p16_p16);

-  u1 = _mm_madd_epi16(v1, k__cospi_p16_p16);

-  u2 = _mm_madd_epi16(v0, k__cospi_p16_m16);

-  u3 = _mm_madd_epi16(v1, k__cospi_p16_m16);

-  u4 = _mm_madd_epi16(v2, k__cospi_p24_p08);

-  u5 = _mm_madd_epi16(v3, k__cospi_p24_p08);

-  u6 = _mm_madd_epi16(v2, k__cospi_m08_p24);

-  u7 = _mm_madd_epi16(v3, k__cospi_m08_p24);

-  // shift and rounding

-  v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);

-  v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);

-  v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);

-  v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);

-  v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);

-  v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING);

-  v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);

-  v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING);

-  u0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

-  u1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

-  u2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

-  u3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

-  u4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

-  u5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

-  u6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

-  u7 = _mm_srai_epi32(v7, DCT_CONST_BITS);

-  in[0] = _mm_packs_epi32(u0, u1);

-  in[2] = _mm_packs_epi32(u4, u5);

-  in[4] = _mm_packs_epi32(u2, u3);

-  in[6] = _mm_packs_epi32(u6, u7);

-  // stage 2

-  // interleave and perform butterfly multiplication/addition

-  u0 = _mm_unpacklo_epi16(s6, s5);

-  u1 = _mm_unpackhi_epi16(s6, s5);

-  v0 = _mm_madd_epi16(u0, k__cospi_p16_m16);

-  v1 = _mm_madd_epi16(u1, k__cospi_p16_m16);

-  v2 = _mm_madd_epi16(u0, k__cospi_p16_p16);

-  v3 = _mm_madd_epi16(u1, k__cospi_p16_p16);

-  // shift and rounding

-  u0 = _mm_add_epi32(v0, k__DCT_CONST_ROUNDING);

-  u1 = _mm_add_epi32(v1, k__DCT_CONST_ROUNDING);

-  u2 = _mm_add_epi32(v2, k__DCT_CONST_ROUNDING);

-  u3 = _mm_add_epi32(v3, k__DCT_CONST_ROUNDING);

-  v0 = _mm_srai_epi32(u0, DCT_CONST_BITS);

-  v1 = _mm_srai_epi32(u1, DCT_CONST_BITS);

-  v2 = _mm_srai_epi32(u2, DCT_CONST_BITS);

-  v3 = _mm_srai_epi32(u3, DCT_CONST_BITS);

-  u0 = _mm_packs_epi32(v0, v1);

-  u1 = _mm_packs_epi32(v2, v3);

-  // stage 3

-  s0 = _mm_add_epi16(s4, u0);

-  s1 = _mm_sub_epi16(s4, u0);

-  s2 = _mm_sub_epi16(s7, u1);

-  s3 = _mm_add_epi16(s7, u1);

-  // stage 4

-  u0 = _mm_unpacklo_epi16(s0, s3);

-  u1 = _mm_unpackhi_epi16(s0, s3);

-  u2 = _mm_unpacklo_epi16(s1, s2);

-  u3 = _mm_unpackhi_epi16(s1, s2);

-  v0 = _mm_madd_epi16(u0, k__cospi_p28_p04);

-  v1 = _mm_madd_epi16(u1, k__cospi_p28_p04);

-  v2 = _mm_madd_epi16(u2, k__cospi_p12_p20);

-  v3 = _mm_madd_epi16(u3, k__cospi_p12_p20);

-  v4 = _mm_madd_epi16(u2, k__cospi_m20_p12);

-  v5 = _mm_madd_epi16(u3, k__cospi_m20_p12);

-  v6 = _mm_madd_epi16(u0, k__cospi_m04_p28);

-  v7 = _mm_madd_epi16(u1, k__cospi_m04_p28);

-  // shift and rounding

-  u0 = _mm_add_epi32(v0, k__DCT_CONST_ROUNDING);

-  u1 = _mm_add_epi32(v1, k__DCT_CONST_ROUNDING);

-  u2 = _mm_add_epi32(v2, k__DCT_CONST_ROUNDING);

-  u3 = _mm_add_epi32(v3, k__DCT_CONST_ROUNDING);

-  u4 = _mm_add_epi32(v4, k__DCT_CONST_ROUNDING);

-  u5 = _mm_add_epi32(v5, k__DCT_CONST_ROUNDING);

-  u6 = _mm_add_epi32(v6, k__DCT_CONST_ROUNDING);

-  u7 = _mm_add_epi32(v7, k__DCT_CONST_ROUNDING);

-  v0 = _mm_srai_epi32(u0, DCT_CONST_BITS);

-  v1 = _mm_srai_epi32(u1, DCT_CONST_BITS);

-  v2 = _mm_srai_epi32(u2, DCT_CONST_BITS);

-  v3 = _mm_srai_epi32(u3, DCT_CONST_BITS);

-  v4 = _mm_srai_epi32(u4, DCT_CONST_BITS);

-  v5 = _mm_srai_epi32(u5, DCT_CONST_BITS);

-  v6 = _mm_srai_epi32(u6, DCT_CONST_BITS);

-  v7 = _mm_srai_epi32(u7, DCT_CONST_BITS);

-  in[1] = _mm_packs_epi32(v0, v1);

-  in[3] = _mm_packs_epi32(v4, v5);

-  in[5] = _mm_packs_epi32(v2, v3);

-  in[7] = _mm_packs_epi32(v6, v7);

-  // transpose

-  array_transpose_8x8(in, in);

-}

-static void fadst8_sse2(__m128i *in) {

-  // Constants

-  const __m128i k__cospi_p02_p30 = pair_set_epi16(cospi_2_64, cospi_30_64);

-  const __m128i k__cospi_p30_m02 = pair_set_epi16(cospi_30_64, -cospi_2_64);

-  const __m128i k__cospi_p10_p22 = pair_set_epi16(cospi_10_64, cospi_22_64);

-  const __m128i k__cospi_p22_m10 = pair_set_epi16(cospi_22_64, -cospi_10_64);

-  const __m128i k__cospi_p18_p14 = pair_set_epi16(cospi_18_64, cospi_14_64);

-  const __m128i k__cospi_p14_m18 = pair_set_epi16(cospi_14_64, -cospi_18_64);

-  const __m128i k__cospi_p26_p06 = pair_set_epi16(cospi_26_64, cospi_6_64);

-  const __m128i k__cospi_p06_m26 = pair_set_epi16(cospi_6_64, -cospi_26_64);

-  const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);

-  const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);

-  const __m128i k__cospi_m24_p08 = pair_set_epi16(-cospi_24_64, cospi_8_64);

-  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

-  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

-  const __m128i k__const_0 = _mm_set1_epi16(0);

-  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

-  __m128i u0, u1, u2, u3, u4, u5, u6, u7, u8, u9, u10, u11, u12, u13, u14, u15;

-  __m128i v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15;

-  __m128i w0, w1, w2, w3, w4, w5, w6, w7, w8, w9, w10, w11, w12, w13, w14, w15;

-  __m128i s0, s1, s2, s3, s4, s5, s6, s7;

-  __m128i in0, in1, in2, in3, in4, in5, in6, in7;

-  // properly aligned for butterfly input

-  in0  = in[7];

-  in1  = in[0];

-  in2  = in[5];

-  in3  = in[2];

-  in4  = in[3];

-  in5  = in[4];

-  in6  = in[1];

-  in7  = in[6];

-  // column transformation

-  // stage 1

-  // interleave and multiply/add into 32-bit integer

-  s0 = _mm_unpacklo_epi16(in0, in1);

-  s1 = _mm_unpackhi_epi16(in0, in1);

-  s2 = _mm_unpacklo_epi16(in2, in3);

-  s3 = _mm_unpackhi_epi16(in2, in3);

-  s4 = _mm_unpacklo_epi16(in4, in5);

-  s5 = _mm_unpackhi_epi16(in4, in5);

-  s6 = _mm_unpacklo_epi16(in6, in7);

-  s7 = _mm_unpackhi_epi16(in6, in7);

-  u0 = _mm_madd_epi16(s0, k__cospi_p02_p30);

-  u1 = _mm_madd_epi16(s1, k__cospi_p02_p30);

-  u2 = _mm_madd_epi16(s0, k__cospi_p30_m02);

-  u3 = _mm_madd_epi16(s1, k__cospi_p30_m02);

-  u4 = _mm_madd_epi16(s2, k__cospi_p10_p22);

-  u5 = _mm_madd_epi16(s3, k__cospi_p10_p22);

-  u6 = _mm_madd_epi16(s2, k__cospi_p22_m10);

-  u7 = _mm_madd_epi16(s3, k__cospi_p22_m10);

-  u8 = _mm_madd_epi16(s4, k__cospi_p18_p14);

-  u9 = _mm_madd_epi16(s5, k__cospi_p18_p14);

-  u10 = _mm_madd_epi16(s4, k__cospi_p14_m18);

-  u11 = _mm_madd_epi16(s5, k__cospi_p14_m18);

-  u12 = _mm_madd_epi16(s6, k__cospi_p26_p06);

-  u13 = _mm_madd_epi16(s7, k__cospi_p26_p06);

-  u14 = _mm_madd_epi16(s6, k__cospi_p06_m26);

-  u15 = _mm_madd_epi16(s7, k__cospi_p06_m26);

-  // addition

-  w0 = _mm_add_epi32(u0, u8);

-  w1 = _mm_add_epi32(u1, u9);

-  w2 = _mm_add_epi32(u2, u10);

-  w3 = _mm_add_epi32(u3, u11);

-  w4 = _mm_add_epi32(u4, u12);

-  w5 = _mm_add_epi32(u5, u13);

-  w6 = _mm_add_epi32(u6, u14);

-  w7 = _mm_add_epi32(u7, u15);

-  w8 = _mm_sub_epi32(u0, u8);

-  w9 = _mm_sub_epi32(u1, u9);

-  w10 = _mm_sub_epi32(u2, u10);

-  w11 = _mm_sub_epi32(u3, u11);

-  w12 = _mm_sub_epi32(u4, u12);

-  w13 = _mm_sub_epi32(u5, u13);

-  w14 = _mm_sub_epi32(u6, u14);

-  w15 = _mm_sub_epi32(u7, u15);

-  // shift and rounding

-  v0 = _mm_add_epi32(w0, k__DCT_CONST_ROUNDING);

-  v1 = _mm_add_epi32(w1, k__DCT_CONST_ROUNDING);

-  v2 = _mm_add_epi32(w2, k__DCT_CONST_ROUNDING);

-  v3 = _mm_add_epi32(w3, k__DCT_CONST_ROUNDING);

-  v4 = _mm_add_epi32(w4, k__DCT_CONST_ROUNDING);

-  v5 = _mm_add_epi32(w5, k__DCT_CONST_ROUNDING);

-  v6 = _mm_add_epi32(w6, k__DCT_CONST_ROUNDING);

-  v7 = _mm_add_epi32(w7, k__DCT_CONST_ROUNDING);

-  v8 = _mm_add_epi32(w8, k__DCT_CONST_ROUNDING);

-  v9 = _mm_add_epi32(w9, k__DCT_CONST_ROUNDING);

-  v10 = _mm_add_epi32(w10, k__DCT_CONST_ROUNDING);

-  v11 = _mm_add_epi32(w11, k__DCT_CONST_ROUNDING);

-  v12 = _mm_add_epi32(w12, k__DCT_CONST_ROUNDING);

-  v13 = _mm_add_epi32(w13, k__DCT_CONST_ROUNDING);

-  v14 = _mm_add_epi32(w14, k__DCT_CONST_ROUNDING);

-  v15 = _mm_add_epi32(w15, k__DCT_CONST_ROUNDING);

-  u0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

-  u1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

-  u2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

-  u3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

-  u4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

-  u5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

-  u6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

-  u7 = _mm_srai_epi32(v7, DCT_CONST_BITS);

-  u8 = _mm_srai_epi32(v8, DCT_CONST_BITS);

-  u9 = _mm_srai_epi32(v9, DCT_CONST_BITS);

-  u10 = _mm_srai_epi32(v10, DCT_CONST_BITS);

-  u11 = _mm_srai_epi32(v11, DCT_CONST_BITS);

-  u12 = _mm_srai_epi32(v12, DCT_CONST_BITS);

-  u13 = _mm_srai_epi32(v13, DCT_CONST_BITS);

-  u14 = _mm_srai_epi32(v14, DCT_CONST_BITS);

-  u15 = _mm_srai_epi32(v15, DCT_CONST_BITS);

-  // back to 16-bit and pack 8 integers into __m128i

-  in[0] = _mm_packs_epi32(u0, u1);

-  in[1] = _mm_packs_epi32(u2, u3);

-  in[2] = _mm_packs_epi32(u4, u5);

-  in[3] = _mm_packs_epi32(u6, u7);

-  in[4] = _mm_packs_epi32(u8, u9);

-  in[5] = _mm_packs_epi32(u10, u11);

-  in[6] = _mm_packs_epi32(u12, u13);

-  in[7] = _mm_packs_epi32(u14, u15);

-  // stage 2

-  s0 = _mm_add_epi16(in[0], in[2]);

-  s1 = _mm_add_epi16(in[1], in[3]);

-  s2 = _mm_sub_epi16(in[0], in[2]);

-  s3 = _mm_sub_epi16(in[1], in[3]);

-  u0 = _mm_unpacklo_epi16(in[4], in[5]);

-  u1 = _mm_unpackhi_epi16(in[4], in[5]);

-  u2 = _mm_unpacklo_epi16(in[6], in[7]);

-  u3 = _mm_unpackhi_epi16(in[6], in[7]);

-  v0 = _mm_madd_epi16(u0, k__cospi_p08_p24);

-  v1 = _mm_madd_epi16(u1, k__cospi_p08_p24);

-  v2 = _mm_madd_epi16(u0, k__cospi_p24_m08);

-  v3 = _mm_madd_epi16(u1, k__cospi_p24_m08);

-  v4 = _mm_madd_epi16(u2, k__cospi_m24_p08);

-  v5 = _mm_madd_epi16(u3, k__cospi_m24_p08);

-  v6 = _mm_madd_epi16(u2, k__cospi_p08_p24);

-  v7 = _mm_madd_epi16(u3, k__cospi_p08_p24);

-  w0 = _mm_add_epi32(v0, v4);

-  w1 = _mm_add_epi32(v1, v5);

-  w2 = _mm_add_epi32(v2, v6);

-  w3 = _mm_add_epi32(v3, v7);

-  w4 = _mm_sub_epi32(v0, v4);

-  w5 = _mm_sub_epi32(v1, v5);

-  w6 = _mm_sub_epi32(v2, v6);

-  w7 = _mm_sub_epi32(v3, v7);

-  v0 = _mm_add_epi32(w0, k__DCT_CONST_ROUNDING);

-  v1 = _mm_add_epi32(w1, k__DCT_CONST_ROUNDING);

-  v2 = _mm_add_epi32(w2, k__DCT_CONST_ROUNDING);

-  v3 = _mm_add_epi32(w3, k__DCT_CONST_ROUNDING);

-  v4 = _mm_add_epi32(w4, k__DCT_CONST_ROUNDING);

-  v5 = _mm_add_epi32(w5, k__DCT_CONST_ROUNDING);

-  v6 = _mm_add_epi32(w6, k__DCT_CONST_ROUNDING);

-  v7 = _mm_add_epi32(w7, k__DCT_CONST_ROUNDING);

-  u0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

-  u1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

-  u2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

-  u3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

-  u4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

-  u5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

-  u6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

-  u7 = _mm_srai_epi32(v7, DCT_CONST_BITS);

-  // back to 16-bit intergers

-  s4 = _mm_packs_epi32(u0, u1);

-  s5 = _mm_packs_epi32(u2, u3);

-  s6 = _mm_packs_epi32(u4, u5);

-  s7 = _mm_packs_epi32(u6, u7);

-  // stage 3

-  u0 = _mm_unpacklo_epi16(s2, s3);

-  u1 = _mm_unpackhi_epi16(s2, s3);

-  u2 = _mm_unpacklo_epi16(s6, s7);

-  u3 = _mm_unpackhi_epi16(s6, s7);

-  v0 = _mm_madd_epi16(u0, k__cospi_p16_p16);

-  v1 = _mm_madd_epi16(u1, k__cospi_p16_p16);

-  v2 = _mm_madd_epi16(u0, k__cospi_p16_m16);

-  v3 = _mm_madd_epi16(u1, k__cospi_p16_m16);

-  v4 = _mm_madd_epi16(u2, k__cospi_p16_p16);

-  v5 = _mm_madd_epi16(u3, k__cospi_p16_p16);

-  v6 = _mm_madd_epi16(u2, k__cospi_p16_m16);

-  v7 = _mm_madd_epi16(u3, k__cospi_p16_m16);

-  u0 = _mm_add_epi32(v0, k__DCT_CONST_ROUNDING);

-  u1 = _mm_add_epi32(v1, k__DCT_CONST_ROUNDING);

-  u2 = _mm_add_epi32(v2, k__DCT_CONST_ROUNDING);

-  u3 = _mm_add_epi32(v3, k__DCT_CONST_ROUNDING);

-  u4 = _mm_add_epi32(v4, k__DCT_CONST_ROUNDING);

-  u5 = _mm_add_epi32(v5, k__DCT_CONST_ROUNDING);

-  u6 = _mm_add_epi32(v6, k__DCT_CONST_ROUNDING);

-  u7 = _mm_add_epi32(v7, k__DCT_CONST_ROUNDING);

-  v0 = _mm_srai_epi32(u0, DCT_CONST_BITS);

-  v1 = _mm_srai_epi32(u1, DCT_CONST_BITS);

-  v2 = _mm_srai_epi32(u2, DCT_CONST_BITS);

-  v3 = _mm_srai_epi32(u3, DCT_CONST_BITS);

-  v4 = _mm_srai_epi32(u4, DCT_CONST_BITS);

-  v5 = _mm_srai_epi32(u5, DCT_CONST_BITS);

-  v6 = _mm_srai_epi32(u6, DCT_CONST_BITS);

-  v7 = _mm_srai_epi32(u7, DCT_CONST_BITS);

-  s2 = _mm_packs_epi32(v0, v1);

-  s3 = _mm_packs_epi32(v2, v3);

-  s6 = _mm_packs_epi32(v4, v5);

-  s7 = _mm_packs_epi32(v6, v7);

-  // FIXME(jingning): do subtract using bit inversion?

-  in[0] = s0;

-  in[1] = _mm_sub_epi16(k__const_0, s4);

-  in[2] = s6;

-  in[3] = _mm_sub_epi16(k__const_0, s2);

-  in[4] = s3;

-  in[5] = _mm_sub_epi16(k__const_0, s7);

-  in[6] = s5;

-  in[7] = _mm_sub_epi16(k__const_0, s1);

-  // transpose

-  array_transpose_8x8(in, in);

-}

-void vp10_fht8x8_sse2(const int16_t *input, tran_low_t *output,

-                     int stride, int tx_type) {

-  __m128i in[8];

-  switch (tx_type) {

-    case DCT_DCT:

-      vpx_fdct8x8_sse2(input, output, stride);

-      break;

-    case ADST_DCT:

-      load_buffer_8x8(input, in, stride);

-      fadst8_sse2(in);

-      fdct8_sse2(in);

-      right_shift_8x8(in, 1);

-      write_buffer_8x8(output, in, 8);

-      break;

-    case DCT_ADST:

-      load_buffer_8x8(input, in, stride);

-      fdct8_sse2(in);

-      fadst8_sse2(in);

-      right_shift_8x8(in, 1);

-      write_buffer_8x8(output, in, 8);

-      break;

-    case ADST_ADST:

-      load_buffer_8x8(input, in, stride);

-      fadst8_sse2(in);

-      fadst8_sse2(in);

-      right_shift_8x8(in, 1);

-      write_buffer_8x8(output, in, 8);

-      break;

-    default:

-      assert(0);

-      break;

-  }

-}

-static INLINE void load_buffer_16x16(const int16_t* input, __m128i *in0,

-                                     __m128i *in1, int stride) {

-  // load first 8 columns

-  load_buffer_8x8(input, in0, stride);

-  load_buffer_8x8(input + 8 * stride, in0 + 8, stride);

-  input += 8;

-  // load second 8 columns

-  load_buffer_8x8(input, in1, stride);

-  load_buffer_8x8(input + 8 * stride, in1 + 8, stride);

-}

-static INLINE void write_buffer_16x16(tran_low_t *output, __m128i *in0,

-                                      __m128i *in1, int stride) {

-  // write first 8 columns

-  write_buffer_8x8(output, in0, stride);

-  write_buffer_8x8(output + 8 * stride, in0 + 8, stride);

-  // write second 8 columns

-  output += 8;

-  write_buffer_8x8(output, in1, stride);

-  write_buffer_8x8(output + 8 * stride, in1 + 8, stride);

-}

-static INLINE void array_transpose_16x16(__m128i *res0, __m128i *res1) {

-  __m128i tbuf[8];

-  array_transpose_8x8(res0, res0);

-  array_transpose_8x8(res1, tbuf);

-  array_transpose_8x8(res0 + 8, res1);

-  array_transpose_8x8(res1 + 8, res1 + 8);

-  res0[8] = tbuf[0];

-  res0[9] = tbuf[1];

-  res0[10] = tbuf[2];

-  res0[11] = tbuf[3];

-  res0[12] = tbuf[4];

-  res0[13] = tbuf[5];

-  res0[14] = tbuf[6];

-  res0[15] = tbuf[7];

-}

-static INLINE void right_shift_16x16(__m128i *res0, __m128i *res1) {

-  // perform rounding operations

-  right_shift_8x8(res0, 2);

-  right_shift_8x8(res0 + 8, 2);

-  right_shift_8x8(res1, 2);

-  right_shift_8x8(res1 + 8, 2);

-}

-static void fdct16_8col(__m128i *in) {

-  // perform 16x16 1-D DCT for 8 columns

-  __m128i i[8], s[8], p[8], t[8], u[16], v[16];

-  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

-  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

-  const __m128i k__cospi_m16_p16 = pair_set_epi16(-cospi_16_64, cospi_16_64);

-  const __m128i k__cospi_p24_p08 = pair_set_epi16(cospi_24_64, cospi_8_64);

-  const __m128i k__cospi_p08_m24 = pair_set_epi16(cospi_8_64, -cospi_24_64);

-  const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64, cospi_24_64);

-  const __m128i k__cospi_p28_p04 = pair_set_epi16(cospi_28_64, cospi_4_64);

-  const __m128i k__cospi_m04_p28 = pair_set_epi16(-cospi_4_64, cospi_28_64);

-  const __m128i k__cospi_p12_p20 = pair_set_epi16(cospi_12_64, cospi_20_64);

-  const __m128i k__cospi_m20_p12 = pair_set_epi16(-cospi_20_64, cospi_12_64);

-  const __m128i k__cospi_p30_p02 = pair_set_epi16(cospi_30_64, cospi_2_64);

-  const __m128i k__cospi_p14_p18 = pair_set_epi16(cospi_14_64, cospi_18_64);

-  const __m128i k__cospi_m02_p30 = pair_set_epi16(-cospi_2_64, cospi_30_64);

-  const __m128i k__cospi_m18_p14 = pair_set_epi16(-cospi_18_64, cospi_14_64);

-  const __m128i k__cospi_p22_p10 = pair_set_epi16(cospi_22_64, cospi_10_64);

-  const __m128i k__cospi_p06_p26 = pair_set_epi16(cospi_6_64, cospi_26_64);

-  const __m128i k__cospi_m10_p22 = pair_set_epi16(-cospi_10_64, cospi_22_64);

-  const __m128i k__cospi_m26_p06 = pair_set_epi16(-cospi_26_64, cospi_6_64);

-  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

-  // stage 1

-  i[0] = _mm_add_epi16(in[0], in[15]);

-  i[1] = _mm_add_epi16(in[1], in[14]);

-  i[2] = _mm_add_epi16(in[2], in[13]);

-  i[3] = _mm_add_epi16(in[3], in[12]);

-  i[4] = _mm_add_epi16(in[4], in[11]);

-  i[5] = _mm_add_epi16(in[5], in[10]);

-  i[6] = _mm_add_epi16(in[6], in[9]);

-  i[7] = _mm_add_epi16(in[7], in[8]);

-  s[0] = _mm_sub_epi16(in[7], in[8]);

-  s[1] = _mm_sub_epi16(in[6], in[9]);

-  s[2] = _mm_sub_epi16(in[5], in[10]);

-  s[3] = _mm_sub_epi16(in[4], in[11]);

-  s[4] = _mm_sub_epi16(in[3], in[12]);

-  s[5] = _mm_sub_epi16(in[2], in[13]);

-  s[6] = _mm_sub_epi16(in[1], in[14]);

-  s[7] = _mm_sub_epi16(in[0], in[15]);

-  p[0] = _mm_add_epi16(i[0], i[7]);

-  p[1] = _mm_add_epi16(i[1], i[6]);

-  p[2] = _mm_add_epi16(i[2], i[5]);

-  p[3] = _mm_add_epi16(i[3], i[4]);

-  p[4] = _mm_sub_epi16(i[3], i[4]);

-  p[5] = _mm_sub_epi16(i[2], i[5]);

-  p[6] = _mm_sub_epi16(i[1], i[6]);

-  p[7] = _mm_sub_epi16(i[0], i[7]);

-  u[0] = _mm_add_epi16(p[0], p[3]);

-  u[1] = _mm_add_epi16(p[1], p[2]);

-  u[2] = _mm_sub_epi16(p[1], p[2]);

-  u[3] = _mm_sub_epi16(p[0], p[3]);

-  v[0] = _mm_unpacklo_epi16(u[0], u[1]);

-  v[1] = _mm_unpackhi_epi16(u[0], u[1]);

-  v[2] = _mm_unpacklo_epi16(u[2], u[3]);

-  v[3] = _mm_unpackhi_epi16(u[2], u[3]);

-  u[0] = _mm_madd_epi16(v[0], k__cospi_p16_p16);

-  u[1] = _mm_madd_epi16(v[1], k__cospi_p16_p16);

-  u[2] = _mm_madd_epi16(v[0], k__cospi_p16_m16);

-  u[3] = _mm_madd_epi16(v[1], k__cospi_p16_m16);

-  u[4] = _mm_madd_epi16(v[2], k__cospi_p24_p08);

-  u[5] = _mm_madd_epi16(v[3], k__cospi_p24_p08);

-  u[6] = _mm_madd_epi16(v[2], k__cospi_m08_p24);

-  u[7] = _mm_madd_epi16(v[3], k__cospi_m08_p24);

-  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

-  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

-  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

-  v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

-  v[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);

-  v[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);

-  v[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);

-  v[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);

-  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

-  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

-  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

-  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);

-  u[4] = _mm_srai_epi32(v[4], DCT_CONST_BITS);

-  u[5] = _mm_srai_epi32(v[5], DCT_CONST_BITS);

-  u[6] = _mm_srai_epi32(v[6], DCT_CONST_BITS);

-  u[7] = _mm_srai_epi32(v[7], DCT_CONST_BITS);

-  in[0] = _mm_packs_epi32(u[0], u[1]);

-  in[4] = _mm_packs_epi32(u[4], u[5]);

-  in[8] = _mm_packs_epi32(u[2], u[3]);

-  in[12] = _mm_packs_epi32(u[6], u[7]);

-  u[0] = _mm_unpacklo_epi16(p[5], p[6]);

-  u[1] = _mm_unpackhi_epi16(p[5], p[6]);

-  v[0] = _mm_madd_epi16(u[0], k__cospi_m16_p16);

-  v[1] = _mm_madd_epi16(u[1], k__cospi_m16_p16);

-  v[2] = _mm_madd_epi16(u[0], k__cospi_p16_p16);

-  v[3] = _mm_madd_epi16(u[1], k__cospi_p16_p16);

-  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

-  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

-  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

-  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

-  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

-  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

-  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

-  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

-  u[0] = _mm_packs_epi32(v[0], v[1]);

-  u[1] = _mm_packs_epi32(v[2], v[3]);

-  t[0] = _mm_add_epi16(p[4], u[0]);

-  t[1] = _mm_sub_epi16(p[4], u[0]);

-  t[2] = _mm_sub_epi16(p[7], u[1]);

-  t[3] = _mm_add_epi16(p[7], u[1]);

-  u[0] = _mm_unpacklo_epi16(t[0], t[3]);

-  u[1] = _mm_unpackhi_epi16(t[0], t[3]);

-  u[2] = _mm_unpacklo_epi16(t[1], t[2]);

-  u[3] = _mm_unpackhi_epi16(t[1], t[2]);

-  v[0] = _mm_madd_epi16(u[0], k__cospi_p28_p04);

-  v[1] = _mm_madd_epi16(u[1], k__cospi_p28_p04);

-  v[2] = _mm_madd_epi16(u[2], k__cospi_p12_p20);

-  v[3] = _mm_madd_epi16(u[3], k__cospi_p12_p20);

-  v[4] = _mm_madd_epi16(u[2], k__cospi_m20_p12);

-  v[5] = _mm_madd_epi16(u[3], k__cospi_m20_p12);

-  v[6] = _mm_madd_epi16(u[0], k__cospi_m04_p28);

-  v[7] = _mm_madd_epi16(u[1], k__cospi_m04_p28);

-  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

-  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

-  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

-  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

-  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

-  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

-  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

-  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);

-  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

-  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

-  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

-  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

-  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

-  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

-  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

-  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

-  in[2] = _mm_packs_epi32(v[0], v[1]);

-  in[6] = _mm_packs_epi32(v[4], v[5]);

-  in[10] = _mm_packs_epi32(v[2], v[3]);

-  in[14] = _mm_packs_epi32(v[6], v[7]);

-  // stage 2

-  u[0] = _mm_unpacklo_epi16(s[2], s[5]);

-  u[1] = _mm_unpackhi_epi16(s[2], s[5]);

-  u[2] = _mm_unpacklo_epi16(s[3], s[4]);

-  u[3] = _mm_unpackhi_epi16(s[3], s[4]);

-  v[0] = _mm_madd_epi16(u[0], k__cospi_m16_p16);

-  v[1] = _mm_madd_epi16(u[1], k__cospi_m16_p16);

-  v[2] = _mm_madd_epi16(u[2], k__cospi_m16_p16);

-  v[3] = _mm_madd_epi16(u[3], k__cospi_m16_p16);

-  v[4] = _mm_madd_epi16(u[2], k__cospi_p16_p16);

-  v[5] = _mm_madd_epi16(u[3], k__cospi_p16_p16);

-  v[6] = _mm_madd_epi16(u[0], k__cospi_p16_p16);

-  v[7] = _mm_madd_epi16(u[1], k__cospi_p16_p16);

-  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

-  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

-  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

-  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

-  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

-  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

-  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

-  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);

-  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

-  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

-  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

-  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

-  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

-  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

-  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

-  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

-  t[2] = _mm_packs_epi32(v[0], v[1]);

-  t[3] = _mm_packs_epi32(v[2], v[3]);

-  t[4] = _mm_packs_epi32(v[4], v[5]);

-  t[5] = _mm_packs_epi32(v[6], v[7]);

-  // stage 3

-  p[0] = _mm_add_epi16(s[0], t[3]);

-  p[1] = _mm_add_epi16(s[1], t[2]);

-  p[2] = _mm_sub_epi16(s[1], t[2]);

-  p[3] = _mm_sub_epi16(s[0], t[3]);

-  p[4] = _mm_sub_epi16(s[7], t[4]);

-  p[5] = _mm_sub_epi16(s[6], t[5]);

-  p[6] = _mm_add_epi16(s[6], t[5]);

-  p[7] = _mm_add_epi16(s[7], t[4]);

-  // stage 4

-  u[0] = _mm_unpacklo_epi16(p[1], p[6]);

-  u[1] = _mm_unpackhi_epi16(p[1], p[6]);

-  u[2] = _mm_unpacklo_epi16(p[2], p[5]);

-  u[3] = _mm_unpackhi_epi16(p[2], p[5]);

-  v[0] = _mm_madd_epi16(u[0], k__cospi_m08_p24);

-  v[1] = _mm_madd_epi16(u[1], k__cospi_m08_p24);

-  v[2] = _mm_madd_epi16(u[2], k__cospi_p24_p08);

-  v[3] = _mm_madd_epi16(u[3], k__cospi_p24_p08);

-  v[4] = _mm_madd_epi16(u[2], k__cospi_p08_m24);

-  v[5] = _mm_madd_epi16(u[3], k__cospi_p08_m24);

-  v[6] = _mm_madd_epi16(u[0], k__cospi_p24_p08);

-  v[7] = _mm_madd_epi16(u[1], k__cospi_p24_p08);

-  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

-  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

-  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

-  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

-  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

-  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

-  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

-  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);

-  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

-  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

-  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

-  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

-  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

-  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

-  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

-  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

-  t[1] = _mm_packs_epi32(v[0], v[1]);

-  t[2] = _mm_packs_epi32(v[2], v[3]);

-  t[5] = _mm_packs_epi32(v[4], v[5]);

-  t[6] = _mm_packs_epi32(v[6], v[7]);

-  // stage 5

-  s[0] = _mm_add_epi16(p[0], t[1]);

-  s[1] = _mm_sub_epi16(p[0], t[1]);

-  s[2] = _mm_add_epi16(p[3], t[2]);

-  s[3] = _mm_sub_epi16(p[3], t[2]);

-  s[4] = _mm_sub_epi16(p[4], t[5]);

-  s[5] = _mm_add_epi16(p[4], t[5]);

-  s[6] = _mm_sub_epi16(p[7], t[6]);

-  s[7] = _mm_add_epi16(p[7], t[6]);

-  // stage 6

-  u[0] = _mm_unpacklo_epi16(s[0], s[7]);

-  u[1] = _mm_unpackhi_epi16(s[0], s[7]);

-  u[2] = _mm_unpacklo_epi16(s[1], s[6]);

-  u[3] = _mm_unpackhi_epi16(s[1], s[6]);

-  u[4] = _mm_unpacklo_epi16(s[2], s[5]);

-  u[5] = _mm_unpackhi_epi16(s[2], s[5]);

-  u[6] = _mm_unpacklo_epi16(s[3], s[4]);

-  u[7] = _mm_unpackhi_epi16(s[3], s[4]);

-  v[0] = _mm_madd_epi16(u[0], k__cospi_p30_p02);

-  v[1] = _mm_madd_epi16(u[1], k__cospi_p30_p02);

-  v[2] = _mm_madd_epi16(u[2], k__cospi_p14_p18);

-  v[3] = _mm_madd_epi16(u[3], k__cospi_p14_p18);

-  v[4] = _mm_madd_epi16(u[4], k__cospi_p22_p10);

-  v[5] = _mm_madd_epi16(u[5], k__cospi_p22_p10);

-  v[6] = _mm_madd_epi16(u[6], k__cospi_p06_p26);

-  v[7] = _mm_madd_epi16(u[7], k__cospi_p06_p26);

-  v[8] = _mm_madd_epi16(u[6], k__cospi_m26_p06);

-  v[9] = _mm_madd_epi16(u[7], k__cospi_m26_p06);

-  v[10] = _mm_madd_epi16(u[4], k__cospi_m10_p22);

-  v[11] = _mm_madd_epi16(u[5], k__cospi_m10_p22);

-  v[12] = _mm_madd_epi16(u[2], k__cospi_m18_p14);

-  v[13] = _mm_madd_epi16(u[3], k__cospi_m18_p14);

-  v[14] = _mm_madd_epi16(u[0], k__cospi_m02_p30);

-  v[15] = _mm_madd_epi16(u[1], k__cospi_m02_p30);

-  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

-  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

-  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

-  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

-  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

-  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

-  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

-  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);

-  u[8] = _mm_add_epi32(v[8], k__DCT_CONST_ROUNDING);

-  u[9] = _mm_add_epi32(v[9], k__DCT_CONST_ROUNDING);

-  u[10] = _mm_add_epi32(v[10], k__DCT_CONST_ROUNDING);

-  u[11] = _mm_add_epi32(v[11], k__DCT_CONST_ROUNDING);

-  u[12] = _mm_add_epi32(v[12], k__DCT_CONST_ROUNDING);

-  u[13] = _mm_add_epi32(v[13], k__DCT_CONST_ROUNDING);

-  u[14] = _mm_add_epi32(v[14], k__DCT_CONST_ROUNDING);

-  u[15] = _mm_add_epi32(v[15], k__DCT_CONST_ROUNDING);

-  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

-  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

-  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

-  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

-  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

-  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

-  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

-  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

-  v[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);

-  v[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);

-  v[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);

-  v[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);

-  v[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);

-  v[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);

-  v[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);

-  v[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);

-  in[1]  = _mm_packs_epi32(v[0], v[1]);

-  in[9]  = _mm_packs_epi32(v[2], v[3]);

-  in[5]  = _mm_packs_epi32(v[4], v[5]);

-  in[13] = _mm_packs_epi32(v[6], v[7]);

-  in[3]  = _mm_packs_epi32(v[8], v[9]);

-  in[11] = _mm_packs_epi32(v[10], v[11]);

-  in[7]  = _mm_packs_epi32(v[12], v[13]);

-  in[15] = _mm_packs_epi32(v[14], v[15]);

-}

-static void fadst16_8col(__m128i *in) {

-  // perform 16x16 1-D ADST for 8 columns

-  __m128i s[16], x[16], u[32], v[32];

-  const __m128i k__cospi_p01_p31 = pair_set_epi16(cospi_1_64, cospi_31_64);

-  const __m128i k__cospi_p31_m01 = pair_set_epi16(cospi_31_64, -cospi_1_64);

-  const __m128i k__cospi_p05_p27 = pair_set_epi16(cospi_5_64, cospi_27_64);

-  const __m128i k__cospi_p27_m05 = pair_set_epi16(cospi_27_64, -cospi_5_64);

-  const __m128i k__cospi_p09_p23 = pair_set_epi16(cospi_9_64, cospi_23_64);

-  const __m128i k__cospi_p23_m09 = pair_set_epi16(cospi_23_64, -cospi_9_64);

-  const __m128i k__cospi_p13_p19 = pair_set_epi16(cospi_13_64, cospi_19_64);

-  const __m128i k__cospi_p19_m13 = pair_set_epi16(cospi_19_64, -cospi_13_64);

-  const __m128i k__cospi_p17_p15 = pair_set_epi16(cospi_17_64, cospi_15_64);

-  const __m128i k__cospi_p15_m17 = pair_set_epi16(cospi_15_64, -cospi_17_64);

-  const __m128i k__cospi_p21_p11 = pair_set_epi16(cospi_21_64, cospi_11_64);

-  const __m128i k__cospi_p11_m21 = pair_set_epi16(cospi_11_64, -cospi_21_64);

-  const __m128i k__cospi_p25_p07 = pair_set_epi16(cospi_25_64, cospi_7_64);

-  const __m128i k__cospi_p07_m25 = pair_set_epi16(cospi_7_64, -cospi_25_64);

-  const __m128i k__cospi_p29_p03 = pair_set_epi16(cospi_29_64, cospi_3_64);

-  const __m128i k__cospi_p03_m29 = pair_set_epi16(cospi_3_64, -cospi_29_64);

-  const __m128i k__cospi_p04_p28 = pair_set_epi16(cospi_4_64, cospi_28_64);

-  const __m128i k__cospi_p28_m04 = pair_set_epi16(cospi_28_64, -cospi_4_64);

-  const __m128i k__cospi_p20_p12 = pair_set_epi16(cospi_20_64, cospi_12_64);

-  const __m128i k__cospi_p12_m20 = pair_set_epi16(cospi_12_64, -cospi_20_64);

-  const __m128i k__cospi_m28_p04 = pair_set_epi16(-cospi_28_64, cospi_4_64);

-  const __m128i k__cospi_m12_p20 = pair_set_epi16(-cospi_12_64, cospi_20_64);

-  const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);

-  const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);

-  const __m128i k__cospi_m24_p08 = pair_set_epi16(-cospi_24_64, cospi_8_64);

-  const __m128i k__cospi_m16_m16 = _mm_set1_epi16((int16_t)-cospi_16_64);

-  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

-  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

-  const __m128i k__cospi_m16_p16 = pair_set_epi16(-cospi_16_64, cospi_16_64);

-  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

-  const __m128i kZero = _mm_set1_epi16(0);

-  u[0] = _mm_unpacklo_epi16(in[15], in[0]);

-  u[1] = _mm_unpackhi_epi16(in[15], in[0]);

-  u[2] = _mm_unpacklo_epi16(in[13], in[2]);

-  u[3] = _mm_unpackhi_epi16(in[13], in[2]);

-  u[4] = _mm_unpacklo_epi16(in[11], in[4]);

-  u[5] = _mm_unpackhi_epi16(in[11], in[4]);

-  u[6] = _mm_unpacklo_epi16(in[9], in[6]);

-  u[7] = _mm_unpackhi_epi16(in[9], in[6]);

-  u[8] = _mm_unpacklo_epi16(in[7], in[8]);

-  u[9] = _mm_unpackhi_epi16(in[7], in[8]);

-  u[10] = _mm_unpacklo_epi16(in[5], in[10]);

-  u[11] = _mm_unpackhi_epi16(in[5], in[10]);

-  u[12] = _mm_unpacklo_epi16(in[3], in[12]);

-  u[13] = _mm_unpackhi_epi16(in[3], in[12]);

-  u[14] = _mm_unpacklo_epi16(in[1], in[14]);

-  u[15] = _mm_unpackhi_epi16(in[1], in[14]);

-  v[0] = _mm_madd_epi16(u[0], k__cospi_p01_p31);

-  v[1] = _mm_madd_epi16(u[1], k__cospi_p01_p31);

-  v[2] = _mm_madd_epi16(u[0], k__cospi_p31_m01);

-  v[3] = _mm_madd_epi16(u[1], k__cospi_p31_m01);

-  v[4] = _mm_madd_epi16(u[2], k__cospi_p05_p27);

-  v[5] = _mm_madd_epi16(u[3], k__cospi_p05_p27);

-  v[6] = _mm_madd_epi16(u[2], k__cospi_p27_m05);

-  v[7] = _mm_madd_epi16(u[3], k__cospi_p27_m05);

-  v[8] = _mm_madd_epi16(u[4], k__cospi_p09_p23);

-  v[9] = _mm_madd_epi16(u[5], k__cospi_p09_p23);

-  v[10] = _mm_madd_epi16(u[4], k__cospi_p23_m09);

-  v[11] = _mm_madd_epi16(u[5], k__cospi_p23_m09);

-  v[12] = _mm_madd_epi16(u[6], k__cospi_p13_p19);

-  v[13] = _mm_madd_epi16(u[7], k__cospi_p13_p19);

-  v[14] = _mm_madd_epi16(u[6], k__cospi_p19_m13);

-  v[15] = _mm_madd_epi16(u[7], k__cospi_p19_m13);

-  v[16] = _mm_madd_epi16(u[8], k__cospi_p17_p15);

-  v[17] = _mm_madd_epi16(u[9], k__cospi_p17_p15);

-  v[18] = _mm_madd_epi16(u[8], k__cospi_p15_m17);

-  v[19] = _mm_madd_epi16(u[9], k__cospi_p15_m17);

-  v[20] = _mm_madd_epi16(u[10], k__cospi_p21_p11);

-  v[21] = _mm_madd_epi16(u[11], k__cospi_p21_p11);

-  v[22] = _mm_madd_epi16(u[10], k__cospi_p11_m21);

-  v[23] = _mm_madd_epi16(u[11], k__cospi_p11_m21);

-  v[24] = _mm_madd_epi16(u[12], k__cospi_p25_p07);

-  v[25] = _mm_madd_epi16(u[13], k__cospi_p25_p07);

-  v[26] = _mm_madd_epi16(u[12], k__cospi_p07_m25);

-  v[27] = _mm_madd_epi16(u[13], k__cospi_p07_m25);

-  v[28] = _mm_madd_epi16(u[14], k__cospi_p29_p03);

-  v[29] = _mm_madd_epi16(u[15], k__cospi_p29_p03);

-  v[30] = _mm_madd_epi16(u[14], k__cospi_p03_m29);

-  v[31] = _mm_madd_epi16(u[15], k__cospi_p03_m29);

-  u[0] = _mm_add_epi32(v[0], v[16]);

-  u[1] = _mm_add_epi32(v[1], v[17]);

-  u[2] = _mm_add_epi32(v[2], v[18]);

-  u[3] = _mm_add_epi32(v[3], v[19]);

-  u[4] = _mm_add_epi32(v[4], v[20]);

-  u[5] = _mm_add_epi32(v[5], v[21]);

-  u[6] = _mm_add_epi32(v[6], v[22]);

-  u[7] = _mm_add_epi32(v[7], v[23]);

-  u[8] = _mm_add_epi32(v[8], v[24]);

-  u[9] = _mm_add_epi32(v[9], v[25]);

-  u[10] = _mm_add_epi32(v[10], v[26]);

-  u[11] = _mm_add_epi32(v[11], v[27]);

-  u[12] = _mm_add_epi32(v[12], v[28]);

-  u[13] = _mm_add_epi32(v[13], v[29]);

-  u[14] = _mm_add_epi32(v[14], v[30]);

-  u[15] = _mm_add_epi32(v[15], v[31]);

-  u[16] = _mm_sub_epi32(v[0], v[16]);

-  u[17] = _mm_sub_epi32(v[1], v[17]);

-  u[18] = _mm_sub_epi32(v[2], v[18]);

-  u[19] = _mm_sub_epi32(v[3], v[19]);

-  u[20] = _mm_sub_epi32(v[4], v[20]);

-  u[21] = _mm_sub_epi32(v[5], v[21]);

-  u[22] = _mm_sub_epi32(v[6], v[22]);

-  u[23] = _mm_sub_epi32(v[7], v[23]);

-  u[24] = _mm_sub_epi32(v[8], v[24]);

-  u[25] = _mm_sub_epi32(v[9], v[25]);

-  u[26] = _mm_sub_epi32(v[10], v[26]);

-  u[27] = _mm_sub_epi32(v[11], v[27]);

-  u[28] = _mm_sub_epi32(v[12], v[28]);

-  u[29] = _mm_sub_epi32(v[13], v[29]);

-  u[30] = _mm_sub_epi32(v[14], v[30]);

-  u[31] = _mm_sub_epi32(v[15], v[31]);

-  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

-  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

-  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

-  v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

-  v[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);

-  v[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);

-  v[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);

-  v[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);

-  v[8] = _mm_add_epi32(u[8], k__DCT_CONST_ROUNDING);

-  v[9] = _mm_add_epi32(u[9], k__DCT_CONST_ROUNDING);

-  v[10] = _mm_add_epi32(u[10], k__DCT_CONST_ROUNDING);

-  v[11] = _mm_add_epi32(u[11], k__DCT_CONST_ROUNDING);

-  v[12] = _mm_add_epi32(u[12], k__DCT_CONST_ROUNDING);

-  v[13] = _mm_add_epi32(u[13], k__DCT_CONST_ROUNDING);

-  v[14] = _mm_add_epi32(u[14], k__DCT_CONST_ROUNDING);

-  v[15] = _mm_add_epi32(u[15], k__DCT_CONST_ROUNDING);

-  v[16] = _mm_add_epi32(u[16], k__DCT_CONST_ROUNDING);

-  v[17] = _mm_add_epi32(u[17], k__DCT_CONST_ROUNDING);

-  v[18] = _mm_add_epi32(u[18], k__DCT_CONST_ROUNDING);

-  v[19] = _mm_add_epi32(u[19], k__DCT_CONST_ROUNDING);

-  v[20] = _mm_add_epi32(u[20], k__DCT_CONST_ROUNDING);

-  v[21] = _mm_add_epi32(u[21], k__DCT_CONST_ROUNDING);

-  v[22] = _mm_add_epi32(u[22], k__DCT_CONST_ROUNDING);

-  v[23] = _mm_add_epi32(u[23], k__DCT_CONST_ROUNDING);

-  v[24] = _mm_add_epi32(u[24], k__DCT_CONST_ROUNDING);

-  v[25] = _mm_add_epi32(u[25], k__DCT_CONST_ROUNDING);

-  v[26] = _mm_add_epi32(u[26], k__DCT_CONST_ROUNDING);

-  v[27] = _mm_add_epi32(u[27], k__DCT_CONST_ROUNDING);

-  v[28] = _mm_add_epi32(u[28], k__DCT_CONST_ROUNDING);

-  v[29] = _mm_add_epi32(u[29], k__DCT_CONST_ROUNDING);

-  v[30] = _mm_add_epi32(u[30], k__DCT_CONST_ROUNDING);

-  v[31] = _mm_add_epi32(u[31], k__DCT_CONST_ROUNDING);

-  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

-  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

-  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

-  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);

-  u[4] = _mm_srai_epi32(v[4], DCT_CONST_BITS);

-  u[5] = _mm_srai_epi32(v[5], DCT_CONST_BITS);

-  u[6] = _mm_srai_epi32(v[6], DCT_CONST_BITS);

-  u[7] = _mm_srai_epi32(v[7], DCT_CONST_BITS);

-  u[8] = _mm_srai_epi32(v[8], DCT_CONST_BITS);

-  u[9] = _mm_srai_epi32(v[9], DCT_CONST_BITS);

-  u[10] = _mm_srai_epi32(v[10], DCT_CONST_BITS);

-  u[11] = _mm_srai_epi32(v[11], DCT_CONST_BITS);

-  u[12] = _mm_srai_epi32(v[12], DCT_CONST_BITS);

-  u[13] = _mm_srai_epi32(v[13], DCT_CONST_BITS);

-  u[14] = _mm_srai_epi32(v[14], DCT_CONST_BITS);

-  u[15] = _mm_srai_epi32(v[15], DCT_CONST_BITS);

-  u[16] = _mm_srai_epi32(v[16], DCT_CONST_BITS);

-  u[17] = _mm_srai_epi32(v[17], DCT_CONST_BITS);

-  u[18] = _mm_srai_epi32(v[18], DCT_CONST_BITS);

-  u[19] = _mm_srai_epi32(v[19], DCT_CONST_BITS);

-  u[20] = _mm_srai_epi32(v[20], DCT_CONST_BITS);

-  u[21] = _mm_srai_epi32(v[21], DCT_CONST_BITS);

-  u[22] = _mm_srai_epi32(v[22], DCT_CONST_BITS);

-  u[23] = _mm_srai_epi32(v[23], DCT_CONST_BITS);

-  u[24] = _mm_srai_epi32(v[24], DCT_CONST_BITS);

-  u[25] = _mm_srai_epi32(v[25], DCT_CONST_BITS);

-  u[26] = _mm_srai_epi32(v[26], DCT_CONST_BITS);

-  u[27] = _mm_srai_epi32(v[27], DCT_CONST_BITS);

-  u[28] = _mm_srai_epi32(v[28], DCT_CONST_BITS);

-  u[29] = _mm_srai_epi32(v[29], DCT_CONST_BITS);

-  u[30] = _mm_srai_epi32(v[30], DCT_CONST_BITS);

-  u[31] = _mm_srai_epi32(v[31], DCT_CONST_BITS);

-  s[0] = _mm_packs_epi32(u[0], u[1]);

-  s[1] = _mm_packs_epi32(u[2], u[3]);

-  s[2] = _mm_packs_epi32(u[4], u[5]);

-  s[3] = _mm_packs_epi32(u[6], u[7]);

-  s[4] = _mm_packs_epi32(u[8], u[9]);

-  s[5] = _mm_packs_epi32(u[10], u[11]);

-  s[6] = _mm_packs_epi32(u[12], u[13]);

-  s[7] = _mm_packs_epi32(u[14], u[15]);

-  s[8] = _mm_packs_epi32(u[16], u[17]);

-  s[9] = _mm_packs_epi32(u[18], u[19]);

-  s[10] = _mm_packs_epi32(u[20], u[21]);

-  s[11] = _mm_packs_epi32(u[22], u[23]);

-  s[12] = _mm_packs_epi32(u[24], u[25]);

-  s[13] = _mm_packs_epi32(u[26], u[27]);

-  s[14] = _mm_packs_epi32(u[28], u[29]);

-  s[15] = _mm_packs_epi32(u[30], u[31]);

-  // stage 2

-  u[0] = _mm_unpacklo_epi16(s[8], s[9]);

-  u[1] = _mm_unpackhi_epi16(s[8], s[9]);

-  u[2] = _mm_unpacklo_epi16(s[10], s[11]);

-  u[3] = _mm_unpackhi_epi16(s[10], s[11]);

-  u[4] = _mm_unpacklo_epi16(s[12], s[13]);

-  u[5] = _mm_unpackhi_epi16(s[12], s[13]);

-  u[6] = _mm_unpacklo_epi16(s[14], s[15]);

-  u[7] = _mm_unpackhi_epi16(s[14], s[15]);

-  v[0] = _mm_madd_epi16(u[0], k__cospi_p04_p28);

-  v[1] = _mm_madd_epi16(u[1], k__cospi_p04_p28);

-  v[2] = _mm_madd_epi16(u[0], k__cospi_p28_m04);

-  v[3] = _mm_madd_epi16(u[1], k__cospi_p28_m04);

-  v[4] = _mm_madd_epi16(u[2], k__cospi_p20_p12);

-  v[5] = _mm_madd_epi16(u[3], k__cospi_p20_p12);

-  v[6] = _mm_madd_epi16(u[2], k__cospi_p12_m20);

-  v[7] = _mm_madd_epi16(u[3], k__cospi_p12_m20);

-  v[8] = _mm_madd_epi16(u[4], k__cospi_m28_p04);

-  v[9] = _mm_madd_epi16(u[5], k__cospi_m28_p04);

-  v[10] = _mm_madd_epi16(u[4], k__cospi_p04_p28);

-  v[11] = _mm_madd_epi16(u[5], k__cospi_p04_p28);

-  v[12] = _mm_madd_epi16(u[6], k__cospi_m12_p20);

-  v[13] = _mm_madd_epi16(u[7], k__cospi_m12_p20);

-  v[14] = _mm_madd_epi16(u[6], k__cospi_p20_p12);

-  v[15] = _mm_madd_epi16(u[7], k__cospi_p20_p12);

-  u[0] = _mm_add_epi32(v[0], v[8]);

-  u[1] = _mm_add_epi32(v[1], v[9]);

-  u[2] = _mm_add_epi32(v[2], v[10]);

-  u[3] = _mm_add_epi32(v[3], v[11]);

-  u[4] = _mm_add_epi32(v[4], v[12]);

-  u[5] = _mm_add_epi32(v[5], v[13]);

-  u[6] = _mm_add_epi32(v[6], v[14]);

-  u[7] = _mm_add_epi32(v[7], v[15]);

-  u[8] = _mm_sub_epi32(v[0], v[8]);

-  u[9] = _mm_sub_epi32(v[1], v[9]);

-  u[10] = _mm_sub_epi32(v[2], v[10]);

-  u[11] = _mm_sub_epi32(v[3], v[11]);

-  u[12] = _mm_sub_epi32(v[4], v[12]);

-  u[13] = _mm_sub_epi32(v[5], v[13]);

-  u[14] = _mm_sub_epi32(v[6], v[14]);

-  u[15] = _mm_sub_epi32(v[7], v[15]);

-  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

-  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

-  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

-  v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

-  v[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);

-  v[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);

-  v[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);

-  v[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);

-  v[8] = _mm_add_epi32(u[8], k__DCT_CONST_ROUNDING);

-  v[9] = _mm_add_epi32(u[9], k__DCT_CONST_ROUNDING);

-  v[10] = _mm_add_epi32(u[10], k__DCT_CONST_ROUNDING);

-  v[11] = _mm_add_epi32(u[11], k__DCT_CONST_ROUNDING);

-  v[12] = _mm_add_epi32(u[12], k__DCT_CONST_ROUNDING);

-  v[13] = _mm_add_epi32(u[13], k__DCT_CONST_ROUNDING);

-  v[14] = _mm_add_epi32(u[14], k__DCT_CONST_ROUNDING);

-  v[15] = _mm_add_epi32(u[15], k__DCT_CONST_ROUNDING);

-  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

-  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

-  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

-  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);

-  u[4] = _mm_srai_epi32(v[4], DCT_CONST_BITS);

-  u[5] = _mm_srai_epi32(v[5], DCT_CONST_BITS);

-  u[6] = _mm_srai_epi32(v[6], DCT_CONST_BITS);

-  u[7] = _mm_srai_epi32(v[7], DCT_CONST_BITS);

-  u[8] = _mm_srai_epi32(v[8], DCT_CONST_BITS);

-  u[9] = _mm_srai_epi32(v[9], DCT_CONST_BITS);

-  u[10] = _mm_srai_epi32(v[10], DCT_CONST_BITS);

-  u[11] = _mm_srai_epi32(v[11], DCT_CONST_BITS);

-  u[12] = _mm_srai_epi32(v[12], DCT_CONST_BITS);

-  u[13] = _mm_srai_epi32(v[13], DCT_CONST_BITS);

-  u[14] = _mm_srai_epi32(v[14], DCT_CONST_BITS);

-  u[15] = _mm_srai_epi32(v[15], DCT_CONST_BITS);

-  x[0] = _mm_add_epi16(s[0], s[4]);

-  x[1] = _mm_add_epi16(s[1], s[5]);

-  x[2] = _mm_add_epi16(s[2], s[6]);

-  x[3] = _mm_add_epi16(s[3], s[7]);

-  x[4] = _mm_sub_epi16(s[0], s[4]);

-  x[5] = _mm_sub_epi16(s[1], s[5]);

-  x[6] = _mm_sub_epi16(s[2], s[6]);

-  x[7] = _mm_sub_epi16(s[3], s[7]);

-  x[8] = _mm_packs_epi32(u[0], u[1]);

-  x[9] = _mm_packs_epi32(u[2], u[3]);

-  x[10] = _mm_packs_epi32(u[4], u[5]);

-  x[11] = _mm_packs_epi32(u[6], u[7]);

-  x[12] = _mm_packs_epi32(u[8], u[9]);

-  x[13] = _mm_packs_epi32(u[10], u[11]);

-  x[14] = _mm_packs_epi32(u[12], u[13]);

-  x[15] = _mm_packs_epi32(u[14], u[15]);

-  // stage 3

-  u[0] = _mm_unpacklo_epi16(x[4], x[5]);

-  u[1] = _mm_unpackhi_epi16(x[4], x[5]);

-  u[2] = _mm_unpacklo_epi16(x[6], x[7]);

-  u[3] = _mm_unpackhi_epi16(x[6], x[7]);

-  u[4] = _mm_unpacklo_epi16(x[12], x[13]);

-  u[5] = _mm_unpackhi_epi16(x[12], x[13]);

-  u[6] = _mm_unpacklo_epi16(x[14], x[15]);

-  u[7] = _mm_unpackhi_epi16(x[14], x[15]);

-  v[0] = _mm_madd_epi16(u[0], k__cospi_p08_p24);

-  v[1] = _mm_madd_epi16(u[1], k__cospi_p08_p24);

-  v[2] = _mm_madd_epi16(u[0], k__cospi_p24_m08);

-  v[3] = _mm_madd_epi16(u[1], k__cospi_p24_m08);

-  v[4] = _mm_madd_epi16(u[2], k__cospi_m24_p08);

-  v[5] = _mm_madd_epi16(u[3], k__cospi_m24_p08);

-  v[6] = _mm_madd_epi16(u[2], k__cospi_p08_p24);

-  v[7] = _mm_madd_epi16(u[3], k__cospi_p08_p24);

-  v[8] = _mm_madd_epi16(u[4], k__cospi_p08_p24);

-  v[9] = _mm_madd_epi16(u[5], k__cospi_p08_p24);

-  v[10] = _mm_madd_epi16(u[4], k__cospi_p24_m08);

-  v[11] = _mm_madd_epi16(u[5], k__cospi_p24_m08);

-  v[12] = _mm_madd_epi16(u[6], k__cospi_m24_p08);

-  v[13] = _mm_madd_epi16(u[7], k__cospi_m24_p08);

-  v[14] = _mm_madd_epi16(u[6], k__cospi_p08_p24);

-  v[15] = _mm_madd_epi16(u[7], k__cospi_p08_p24);

-  u[0] = _mm_add_epi32(v[0], v[4]);

-  u[1] = _mm_add_epi32(v[1], v[5]);

-  u[2] = _mm_add_epi32(v[2], v[6]);

-  u[3] = _mm_add_epi32(v[3], v[7]);

-  u[4] = _mm_sub_epi32(v[0], v[4]);

-  u[5] = _mm_sub_epi32(v[1], v[5]);

-  u[6] = _mm_sub_epi32(v[2], v[6]);

-  u[7] = _mm_sub_epi32(v[3], v[7]);

-  u[8] = _mm_add_epi32(v[8], v[12]);

-  u[9] = _mm_add_epi32(v[9], v[13]);

-  u[10] = _mm_add_epi32(v[10], v[14]);

-  u[11] = _mm_add_epi32(v[11], v[15]);

-  u[12] = _mm_sub_epi32(v[8], v[12]);

-  u[13] = _mm_sub_epi32(v[9], v[13]);

-  u[14] = _mm_sub_epi32(v[10], v[14]);

-  u[15] = _mm_sub_epi32(v[11], v[15]);

-  u[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

-  u[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

-  u[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

-  u[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

-  u[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);

-  u[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);

-  u[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);

-  u[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);

-  u[8] = _mm_add_epi32(u[8], k__DCT_CONST_ROUNDING);

-  u[9] = _mm_add_epi32(u[9], k__DCT_CONST_ROUNDING);

-  u[10] = _mm_add_epi32(u[10], k__DCT_CONST_ROUNDING);

-  u[11] = _mm_add_epi32(u[11], k__DCT_CONST_ROUNDING);

-  u[12] = _mm_add_epi32(u[12], k__DCT_CONST_ROUNDING);

-  u[13] = _mm_add_epi32(u[13], k__DCT_CONST_ROUNDING);

-  u[14] = _mm_add_epi32(u[14], k__DCT_CONST_ROUNDING);

-  u[15] = _mm_add_epi32(u[15], k__DCT_CONST_ROUNDING);

-  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

-  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

-  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

-  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

-  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

-  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

-  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

-  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

-  v[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);

-  v[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);

-  v[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);

-  v[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);

-  v[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);

-  v[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);

-  v[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);

-  v[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);

-  s[0] = _mm_add_epi16(x[0], x[2]);

-  s[1] = _mm_add_epi16(x[1], x[3]);

-  s[2] = _mm_sub_epi16(x[0], x[2]);

-  s[3] = _mm_sub_epi16(x[1], x[3]);

-  s[4] = _mm_packs_epi32(v[0], v[1]);

-  s[5] = _mm_packs_epi32(v[2], v[3]);

-  s[6] = _mm_packs_epi32(v[4], v[5]);

-  s[7] = _mm_packs_epi32(v[6], v[7]);

-  s[8] = _mm_add_epi16(x[8], x[10]);

-  s[9] = _mm_add_epi16(x[9], x[11]);

-  s[10] = _mm_sub_epi16(x[8], x[10]);

-  s[11] = _mm_sub_epi16(x[9], x[11]);

-  s[12] = _mm_packs_epi32(v[8], v[9]);

-  s[13] = _mm_packs_epi32(v[10], v[11]);

-  s[14] = _mm_packs_epi32(v[12], v[13]);

-  s[15] = _mm_packs_epi32(v[14], v[15]);

-  // stage 4

-  u[0] = _mm_unpacklo_epi16(s[2], s[3]);

-  u[1] = _mm_unpackhi_epi16(s[2], s[3]);

-  u[2] = _mm_unpacklo_epi16(s[6], s[7]);

-  u[3] = _mm_unpackhi_epi16(s[6], s[7]);

-  u[4] = _mm_unpacklo_epi16(s[10], s[11]);

-  u[5] = _mm_unpackhi_epi16(s[10], s[11]);

-  u[6] = _mm_unpacklo_epi16(s[14], s[15]);

-  u[7] = _mm_unpackhi_epi16(s[14], s[15]);

-  v[0] = _mm_madd_epi16(u[0], k__cospi_m16_m16);

-  v[1] = _mm_madd_epi16(u[1], k__cospi_m16_m16);

-  v[2] = _mm_madd_epi16(u[0], k__cospi_p16_m16);

-  v[3] = _mm_madd_epi16(u[1], k__cospi_p16_m16);

-  v[4] = _mm_madd_epi16(u[2], k__cospi_p16_p16);

-  v[5] = _mm_madd_epi16(u[3], k__cospi_p16_p16);

-  v[6] = _mm_madd_epi16(u[2], k__cospi_m16_p16);

-  v[7] = _mm_madd_epi16(u[3], k__cospi_m16_p16);

-  v[8] = _mm_madd_epi16(u[4], k__cospi_p16_p16);

-  v[9] = _mm_madd_epi16(u[5], k__cospi_p16_p16);

-  v[10] = _mm_madd_epi16(u[4], k__cospi_m16_p16);

-  v[11] = _mm_madd_epi16(u[5], k__cospi_m16_p16);

-  v[12] = _mm_madd_epi16(u[6], k__cospi_m16_m16);

-  v[13] = _mm_madd_epi16(u[7], k__cospi_m16_m16);

-  v[14] = _mm_madd_epi16(u[6], k__cospi_p16_m16);

-  v[15] = _mm_madd_epi16(u[7], k__cospi_p16_m16);

-  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

-  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

-  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

-  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

-  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

-  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

-  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

-  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);

-  u[8] = _mm_add_epi32(v[8], k__DCT_CONST_ROUNDING);

-  u[9] = _mm_add_epi32(v[9], k__DCT_CONST_ROUNDING);

-  u[10] = _mm_add_epi32(v[10], k__DCT_CONST_ROUNDING);

-  u[11] = _mm_add_epi32(v[11], k__DCT_CONST_ROUNDING);

-  u[12] = _mm_add_epi32(v[12], k__DCT_CONST_ROUNDING);

-  u[13] = _mm_add_epi32(v[13], k__DCT_CONST_ROUNDING);

-  u[14] = _mm_add_epi32(v[14], k__DCT_CONST_ROUNDING);

-  u[15] = _mm_add_epi32(v[15], k__DCT_CONST_ROUNDING);

-  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

-  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

-  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

-  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

-  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

-  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

-  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

-  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

-  v[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);

-  v[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);

-  v[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);

-  v[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);

-  v[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);

-  v[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);

-  v[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);

-  v[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);

-  in[0] = s[0];

-  in[1] = _mm_sub_epi16(kZero, s[8]);

-  in[2] = s[12];

-  in[3] = _mm_sub_epi16(kZero, s[4]);

-  in[4] = _mm_packs_epi32(v[4], v[5]);

-  in[5] = _mm_packs_epi32(v[12], v[13]);

-  in[6] = _mm_packs_epi32(v[8], v[9]);

-  in[7] = _mm_packs_epi32(v[0], v[1]);

-  in[8] = _mm_packs_epi32(v[2], v[3]);

-  in[9] = _mm_packs_epi32(v[10], v[11]);

-  in[10] = _mm_packs_epi32(v[14], v[15]);

-  in[11] = _mm_packs_epi32(v[6], v[7]);

-  in[12] = s[5];

-  in[13] = _mm_sub_epi16(kZero, s[13]);

-  in[14] = s[9];

-  in[15] = _mm_sub_epi16(kZero, s[1]);

-}

-static void fdct16_sse2(__m128i *in0, __m128i *in1) {

-  fdct16_8col(in0);

-  fdct16_8col(in1);

-  array_transpose_16x16(in0, in1);

-}

-static void fadst16_sse2(__m128i *in0, __m128i *in1) {

-  fadst16_8col(in0);

-  fadst16_8col(in1);

-  array_transpose_16x16(in0, in1);

-}

-void vp10_fht16x16_sse2(const int16_t *input, tran_low_t *output,

-                       int stride, int tx_type) {

-  __m128i in0[16], in1[16];

-  switch (tx_type) {

-    case DCT_DCT:

-      vpx_fdct16x16_sse2(input, output, stride);

-      break;

-    case ADST_DCT:

-      load_buffer_16x16(input, in0, in1, stride);

-      fadst16_sse2(in0, in1);

-      right_shift_16x16(in0, in1);

-      fdct16_sse2(in0, in1);

-      write_buffer_16x16(output, in0, in1, 16);

-      break;

-    case DCT_ADST:

-      load_buffer_16x16(input, in0, in1, stride);

-      fdct16_sse2(in0, in1);

-      right_shift_16x16(in0, in1);

-      fadst16_sse2(in0, in1);

-      write_buffer_16x16(output, in0, in1, 16);

-      break;

-    case ADST_ADST:

-      load_buffer_16x16(input, in0, in1, stride);

-      fadst16_sse2(in0, in1);

-      right_shift_16x16(in0, in1);

-      fadst16_sse2(in0, in1);

-      write_buffer_16x16(output, in0, in1, 16);

-      break;

-    default:

-      assert(0);

-      break;

-  }

-}

--- a/vp10/vp10cx.mk

+++ b/vp10/vp10cx.mk

@@ -93,7 +93,7 @@

 endif

 ifeq ($(CONFIG_USE_X86INC),yes)

-VP10_CX_SRCS-$(HAVE_MMX) += encoder/x86/dct_mmx.asm

+VP10_CX_SRCS-$(HAVE_SSE2) += encoder/x86/dct_sse2.asm

 VP10_CX_SRCS-$(HAVE_SSE2) += encoder/x86/error_sse2.asm

 endif

@@ -103,7 +103,7 @@

 endif

 endif

-VP10_CX_SRCS-$(HAVE_SSE2) += encoder/x86/dct_sse2.c

+VP10_CX_SRCS-$(HAVE_SSE2) += encoder/x86/dct_intrin_sse2.c

 VP10_CX_SRCS-$(HAVE_SSSE3) += encoder/x86/dct_ssse3.c

 ifeq ($(CONFIG_VP9_TEMPORAL_DENOISING),yes)

--- a/vp9/common/vp9_rtcd_defs.pl

+++ b/vp9/common/vp9_rtcd_defs.pl

@@ -245,7 +245,7 @@

   specialize qw/vp9_fht16x16 sse2/;

   add_proto qw/void vp9_fwht4x4/, "const int16_t *input, tran_low_t *output, int stride";

-  specialize qw/vp9_fwht4x4/, "$mmx_x86inc";

+  specialize qw/vp9_fwht4x4/, "$sse2_x86inc";

 } else {

   add_proto qw/void vp9_fht4x4/, "const int16_t *input, tran_low_t *output, int stride, int tx_type";

   specialize qw/vp9_fht4x4 sse2 msa/;

@@ -257,7 +257,7 @@

   specialize qw/vp9_fht16x16 sse2 msa/;

   add_proto qw/void vp9_fwht4x4/, "const int16_t *input, tran_low_t *output, int stride";

-  specialize qw/vp9_fwht4x4 msa/, "$mmx_x86inc";

+  specialize qw/vp9_fwht4x4 msa/, "$sse2_x86inc";

--- /dev/null

+++ b/vp9/encoder/x86/vp9_dct_intrin_sse2.c

@@ -1,0 +1,2058 @@

+/*

+ *  Copyright (c) 2012 The WebM project authors. All Rights Reserved.

+ *

+ *  Use of this source code is governed by a BSD-style license

+ *  that can be found in the LICENSE file in the root of the source

+ *  tree. An additional intellectual property rights grant can be found

+ *  in the file PATENTS.  All contributing project authors may

+ *  be found in the AUTHORS file in the root of the source tree.

+ */

+#include <assert.h>

+#include <emmintrin.h>  // SSE2

+#include "./vp9_rtcd.h"

+#include "./vpx_dsp_rtcd.h"

+#include "vpx_dsp/txfm_common.h"

+#include "vpx_dsp/x86/fwd_txfm_sse2.h"

+#include "vpx_dsp/x86/txfm_common_sse2.h"

+#include "vpx_ports/mem.h"

+static INLINE void load_buffer_4x4(const int16_t *input, __m128i *in,

+                                   int stride) {

+  const __m128i k__nonzero_bias_a = _mm_setr_epi16(0, 1, 1, 1, 1, 1, 1, 1);

+  const __m128i k__nonzero_bias_b = _mm_setr_epi16(1, 0, 0, 0, 0, 0, 0, 0);

+  __m128i mask;

+  in[0] = _mm_loadl_epi64((const __m128i *)(input + 0 * stride));

+  in[1] = _mm_loadl_epi64((const __m128i *)(input + 1 * stride));

+  in[2] = _mm_loadl_epi64((const __m128i *)(input + 2 * stride));

+  in[3] = _mm_loadl_epi64((const __m128i *)(input + 3 * stride));

+  in[0] = _mm_slli_epi16(in[0], 4);

+  in[1] = _mm_slli_epi16(in[1], 4);

+  in[2] = _mm_slli_epi16(in[2], 4);

+  in[3] = _mm_slli_epi16(in[3], 4);

+  mask = _mm_cmpeq_epi16(in[0], k__nonzero_bias_a);

+  in[0] = _mm_add_epi16(in[0], mask);

+  in[0] = _mm_add_epi16(in[0], k__nonzero_bias_b);

+}

+static INLINE void write_buffer_4x4(tran_low_t *output, __m128i *res) {

+  const __m128i kOne = _mm_set1_epi16(1);

+  __m128i in01 = _mm_unpacklo_epi64(res[0], res[1]);

+  __m128i in23 = _mm_unpacklo_epi64(res[2], res[3]);

+  __m128i out01 = _mm_add_epi16(in01, kOne);

+  __m128i out23 = _mm_add_epi16(in23, kOne);

+  out01 = _mm_srai_epi16(out01, 2);

+  out23 = _mm_srai_epi16(out23, 2);

+  store_output(&out01, (output + 0 * 8));

+  store_output(&out23, (output + 1 * 8));

+}

+static INLINE void transpose_4x4(__m128i *res) {

+  // Combine and transpose

+  // 00 01 02 03 20 21 22 23

+  // 10 11 12 13 30 31 32 33

+  const __m128i tr0_0 = _mm_unpacklo_epi16(res[0], res[1]);

+  const __m128i tr0_1 = _mm_unpackhi_epi16(res[0], res[1]);

+  // 00 10 01 11 02 12 03 13

+  // 20 30 21 31 22 32 23 33

+  res[0] = _mm_unpacklo_epi32(tr0_0, tr0_1);

+  res[2] = _mm_unpackhi_epi32(tr0_0, tr0_1);

+  // 00 10 20 30 01 11 21 31

+  // 02 12 22 32 03 13 23 33

+  // only use the first 4 16-bit integers

+  res[1] = _mm_unpackhi_epi64(res[0], res[0]);

+  res[3] = _mm_unpackhi_epi64(res[2], res[2]);

+}

+static void fdct4_sse2(__m128i *in) {

+  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

+  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

+  const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);

+  const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);

+  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

+  __m128i u[4], v[4];

+  u[0]=_mm_unpacklo_epi16(in[0], in[1]);

+  u[1]=_mm_unpacklo_epi16(in[3], in[2]);

+  v[0] = _mm_add_epi16(u[0], u[1]);

+  v[1] = _mm_sub_epi16(u[0], u[1]);

+  u[0] = _mm_madd_epi16(v[0], k__cospi_p16_p16);  // 0

+  u[1] = _mm_madd_epi16(v[0], k__cospi_p16_m16);  // 2

+  u[2] = _mm_madd_epi16(v[1], k__cospi_p08_p24);  // 1

+  u[3] = _mm_madd_epi16(v[1], k__cospi_p24_m08);  // 3

+  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

+  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

+  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

+  v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

+  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

+  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

+  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

+  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);

+  in[0] = _mm_packs_epi32(u[0], u[1]);

+  in[1] = _mm_packs_epi32(u[2], u[3]);

+  transpose_4x4(in);

+}

+static void fadst4_sse2(__m128i *in) {

+  const __m128i k__sinpi_p01_p02 = pair_set_epi16(sinpi_1_9, sinpi_2_9);

+  const __m128i k__sinpi_p04_m01 = pair_set_epi16(sinpi_4_9, -sinpi_1_9);

+  const __m128i k__sinpi_p03_p04 = pair_set_epi16(sinpi_3_9, sinpi_4_9);

+  const __m128i k__sinpi_m03_p02 = pair_set_epi16(-sinpi_3_9, sinpi_2_9);

+  const __m128i k__sinpi_p03_p03 = _mm_set1_epi16((int16_t)sinpi_3_9);

+  const __m128i kZero = _mm_set1_epi16(0);

+  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

+  __m128i u[8], v[8];

+  __m128i in7 = _mm_add_epi16(in[0], in[1]);

+  u[0] = _mm_unpacklo_epi16(in[0], in[1]);

+  u[1] = _mm_unpacklo_epi16(in[2], in[3]);

+  u[2] = _mm_unpacklo_epi16(in7, kZero);

+  u[3] = _mm_unpacklo_epi16(in[2], kZero);

+  u[4] = _mm_unpacklo_epi16(in[3], kZero);

+  v[0] = _mm_madd_epi16(u[0], k__sinpi_p01_p02);  // s0 + s2

+  v[1] = _mm_madd_epi16(u[1], k__sinpi_p03_p04);  // s4 + s5

+  v[2] = _mm_madd_epi16(u[2], k__sinpi_p03_p03);  // x1

+  v[3] = _mm_madd_epi16(u[0], k__sinpi_p04_m01);  // s1 - s3

+  v[4] = _mm_madd_epi16(u[1], k__sinpi_m03_p02);  // -s4 + s6

+  v[5] = _mm_madd_epi16(u[3], k__sinpi_p03_p03);  // s4

+  v[6] = _mm_madd_epi16(u[4], k__sinpi_p03_p03);

+  u[0] = _mm_add_epi32(v[0], v[1]);

+  u[1] = _mm_sub_epi32(v[2], v[6]);

+  u[2] = _mm_add_epi32(v[3], v[4]);

+  u[3] = _mm_sub_epi32(u[2], u[0]);

+  u[4] = _mm_slli_epi32(v[5], 2);

+  u[5] = _mm_sub_epi32(u[4], v[5]);

+  u[6] = _mm_add_epi32(u[3], u[5]);

+  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

+  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

+  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

+  v[3] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);

+  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

+  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

+  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

+  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);

+  in[0] = _mm_packs_epi32(u[0], u[2]);

+  in[1] = _mm_packs_epi32(u[1], u[3]);

+  transpose_4x4(in);

+}

+void vp9_fht4x4_sse2(const int16_t *input, tran_low_t *output,

+                     int stride, int tx_type) {

+  __m128i in[4];

+  switch (tx_type) {

+    case DCT_DCT:

+      vpx_fdct4x4_sse2(input, output, stride);

+      break;

+    case ADST_DCT:

+      load_buffer_4x4(input, in, stride);

+      fadst4_sse2(in);

+      fdct4_sse2(in);

+      write_buffer_4x4(output, in);

+      break;

+    case DCT_ADST:

+      load_buffer_4x4(input, in, stride);

+      fdct4_sse2(in);

+      fadst4_sse2(in);

+      write_buffer_4x4(output, in);

+      break;

+    case ADST_ADST:

+      load_buffer_4x4(input, in, stride);

+      fadst4_sse2(in);

+      fadst4_sse2(in);

+      write_buffer_4x4(output, in);

+      break;

+   default:

+     assert(0);

+     break;

+  }

+}

+void vp9_fdct8x8_quant_sse2(const int16_t *input, int stride,

+                            int16_t* coeff_ptr, intptr_t n_coeffs,

+                            int skip_block, const int16_t* zbin_ptr,

+                            const int16_t* round_ptr, const int16_t* quant_ptr,

+                            const int16_t* quant_shift_ptr, int16_t* qcoeff_ptr,

+                            int16_t* dqcoeff_ptr, const int16_t* dequant_ptr,

+                            uint16_t* eob_ptr,

+                            const int16_t* scan_ptr,

+                            const int16_t* iscan_ptr) {

+  __m128i zero;

+  int pass;

+  // Constants

+  //    When we use them, in one case, they are all the same. In all others

+  //    it's a pair of them that we need to repeat four times. This is done

+  //    by constructing the 32 bit constant corresponding to that pair.

+  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

+  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

+  const __m128i k__cospi_p24_p08 = pair_set_epi16(cospi_24_64, cospi_8_64);

+  const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64, cospi_24_64);

+  const __m128i k__cospi_p28_p04 = pair_set_epi16(cospi_28_64, cospi_4_64);

+  const __m128i k__cospi_m04_p28 = pair_set_epi16(-cospi_4_64, cospi_28_64);

+  const __m128i k__cospi_p12_p20 = pair_set_epi16(cospi_12_64, cospi_20_64);

+  const __m128i k__cospi_m20_p12 = pair_set_epi16(-cospi_20_64, cospi_12_64);

+  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

+  // Load input

+  __m128i in0  = _mm_load_si128((const __m128i *)(input + 0 * stride));

+  __m128i in1  = _mm_load_si128((const __m128i *)(input + 1 * stride));

+  __m128i in2  = _mm_load_si128((const __m128i *)(input + 2 * stride));

+  __m128i in3  = _mm_load_si128((const __m128i *)(input + 3 * stride));

+  __m128i in4  = _mm_load_si128((const __m128i *)(input + 4 * stride));

+  __m128i in5  = _mm_load_si128((const __m128i *)(input + 5 * stride));

+  __m128i in6  = _mm_load_si128((const __m128i *)(input + 6 * stride));

+  __m128i in7  = _mm_load_si128((const __m128i *)(input + 7 * stride));

+  __m128i *in[8];

+  int index = 0;

+  (void)scan_ptr;

+  (void)zbin_ptr;

+  (void)quant_shift_ptr;

+  (void)coeff_ptr;

+  // Pre-condition input (shift by two)

+  in0 = _mm_slli_epi16(in0, 2);

+  in1 = _mm_slli_epi16(in1, 2);

+  in2 = _mm_slli_epi16(in2, 2);

+  in3 = _mm_slli_epi16(in3, 2);

+  in4 = _mm_slli_epi16(in4, 2);

+  in5 = _mm_slli_epi16(in5, 2);

+  in6 = _mm_slli_epi16(in6, 2);

+  in7 = _mm_slli_epi16(in7, 2);

+  in[0] = &in0;

+  in[1] = &in1;

+  in[2] = &in2;

+  in[3] = &in3;

+  in[4] = &in4;

+  in[5] = &in5;

+  in[6] = &in6;

+  in[7] = &in7;

+  // We do two passes, first the columns, then the rows. The results of the

+  // first pass are transposed so that the same column code can be reused. The

+  // results of the second pass are also transposed so that the rows (processed

+  // as columns) are put back in row positions.

+  for (pass = 0; pass < 2; pass++) {

+    // To store results of each pass before the transpose.

+    __m128i res0, res1, res2, res3, res4, res5, res6, res7;

+    // Add/subtract

+    const __m128i q0 = _mm_add_epi16(in0, in7);

+    const __m128i q1 = _mm_add_epi16(in1, in6);

+    const __m128i q2 = _mm_add_epi16(in2, in5);

+    const __m128i q3 = _mm_add_epi16(in3, in4);

+    const __m128i q4 = _mm_sub_epi16(in3, in4);

+    const __m128i q5 = _mm_sub_epi16(in2, in5);

+    const __m128i q6 = _mm_sub_epi16(in1, in6);

+    const __m128i q7 = _mm_sub_epi16(in0, in7);

+    // Work on first four results

+    {

+      // Add/subtract

+      const __m128i r0 = _mm_add_epi16(q0, q3);

+      const __m128i r1 = _mm_add_epi16(q1, q2);

+      const __m128i r2 = _mm_sub_epi16(q1, q2);

+      const __m128i r3 = _mm_sub_epi16(q0, q3);

+      // Interleave to do the multiply by constants which gets us into 32bits

+      const __m128i t0 = _mm_unpacklo_epi16(r0, r1);

+      const __m128i t1 = _mm_unpackhi_epi16(r0, r1);

+      const __m128i t2 = _mm_unpacklo_epi16(r2, r3);

+      const __m128i t3 = _mm_unpackhi_epi16(r2, r3);

+      const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p16_p16);

+      const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p16_p16);

+      const __m128i u2 = _mm_madd_epi16(t0, k__cospi_p16_m16);

+      const __m128i u3 = _mm_madd_epi16(t1, k__cospi_p16_m16);

+      const __m128i u4 = _mm_madd_epi16(t2, k__cospi_p24_p08);

+      const __m128i u5 = _mm_madd_epi16(t3, k__cospi_p24_p08);

+      const __m128i u6 = _mm_madd_epi16(t2, k__cospi_m08_p24);

+      const __m128i u7 = _mm_madd_epi16(t3, k__cospi_m08_p24);

+      // dct_const_round_shift

+      const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);

+      const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);

+      const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);

+      const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);

+      const __m128i v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);

+      const __m128i v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING);

+      const __m128i v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);

+      const __m128i v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING);

+      const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

+      const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

+      const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

+      const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

+      const __m128i w4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

+      const __m128i w5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

+      const __m128i w6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

+      const __m128i w7 = _mm_srai_epi32(v7, DCT_CONST_BITS);

+      // Combine

+      res0 = _mm_packs_epi32(w0, w1);

+      res4 = _mm_packs_epi32(w2, w3);

+      res2 = _mm_packs_epi32(w4, w5);

+      res6 = _mm_packs_epi32(w6, w7);

+    }

+    // Work on next four results

+    {

+      // Interleave to do the multiply by constants which gets us into 32bits

+      const __m128i d0 = _mm_unpacklo_epi16(q6, q5);

+      const __m128i d1 = _mm_unpackhi_epi16(q6, q5);

+      const __m128i e0 = _mm_madd_epi16(d0, k__cospi_p16_m16);

+      const __m128i e1 = _mm_madd_epi16(d1, k__cospi_p16_m16);

+      const __m128i e2 = _mm_madd_epi16(d0, k__cospi_p16_p16);

+      const __m128i e3 = _mm_madd_epi16(d1, k__cospi_p16_p16);

+      // dct_const_round_shift

+      const __m128i f0 = _mm_add_epi32(e0, k__DCT_CONST_ROUNDING);

+      const __m128i f1 = _mm_add_epi32(e1, k__DCT_CONST_ROUNDING);

+      const __m128i f2 = _mm_add_epi32(e2, k__DCT_CONST_ROUNDING);

+      const __m128i f3 = _mm_add_epi32(e3, k__DCT_CONST_ROUNDING);

+      const __m128i s0 = _mm_srai_epi32(f0, DCT_CONST_BITS);

+      const __m128i s1 = _mm_srai_epi32(f1, DCT_CONST_BITS);

+      const __m128i s2 = _mm_srai_epi32(f2, DCT_CONST_BITS);

+      const __m128i s3 = _mm_srai_epi32(f3, DCT_CONST_BITS);

+      // Combine

+      const __m128i r0 = _mm_packs_epi32(s0, s1);

+      const __m128i r1 = _mm_packs_epi32(s2, s3);

+      // Add/subtract

+      const __m128i x0 = _mm_add_epi16(q4, r0);

+      const __m128i x1 = _mm_sub_epi16(q4, r0);

+      const __m128i x2 = _mm_sub_epi16(q7, r1);

+      const __m128i x3 = _mm_add_epi16(q7, r1);

+      // Interleave to do the multiply by constants which gets us into 32bits

+      const __m128i t0 = _mm_unpacklo_epi16(x0, x3);

+      const __m128i t1 = _mm_unpackhi_epi16(x0, x3);

+      const __m128i t2 = _mm_unpacklo_epi16(x1, x2);

+      const __m128i t3 = _mm_unpackhi_epi16(x1, x2);

+      const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p28_p04);

+      const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p28_p04);

+      const __m128i u2 = _mm_madd_epi16(t0, k__cospi_m04_p28);

+      const __m128i u3 = _mm_madd_epi16(t1, k__cospi_m04_p28);

+      const __m128i u4 = _mm_madd_epi16(t2, k__cospi_p12_p20);

+      const __m128i u5 = _mm_madd_epi16(t3, k__cospi_p12_p20);

+      const __m128i u6 = _mm_madd_epi16(t2, k__cospi_m20_p12);

+      const __m128i u7 = _mm_madd_epi16(t3, k__cospi_m20_p12);

+      // dct_const_round_shift

+      const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);

+      const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);

+      const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);

+      const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);

+      const __m128i v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);

+      const __m128i v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING);

+      const __m128i v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);

+      const __m128i v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING);

+      const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

+      const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

+      const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

+      const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

+      const __m128i w4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

+      const __m128i w5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

+      const __m128i w6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

+      const __m128i w7 = _mm_srai_epi32(v7, DCT_CONST_BITS);

+      // Combine

+      res1 = _mm_packs_epi32(w0, w1);

+      res7 = _mm_packs_epi32(w2, w3);

+      res5 = _mm_packs_epi32(w4, w5);

+      res3 = _mm_packs_epi32(w6, w7);

+    }

+    // Transpose the 8x8.

+    {

+      // 00 01 02 03 04 05 06 07

+      // 10 11 12 13 14 15 16 17

+      // 20 21 22 23 24 25 26 27

+      // 30 31 32 33 34 35 36 37

+      // 40 41 42 43 44 45 46 47

+      // 50 51 52 53 54 55 56 57

+      // 60 61 62 63 64 65 66 67

+      // 70 71 72 73 74 75 76 77

+      const __m128i tr0_0 = _mm_unpacklo_epi16(res0, res1);

+      const __m128i tr0_1 = _mm_unpacklo_epi16(res2, res3);

+      const __m128i tr0_2 = _mm_unpackhi_epi16(res0, res1);

+      const __m128i tr0_3 = _mm_unpackhi_epi16(res2, res3);

+      const __m128i tr0_4 = _mm_unpacklo_epi16(res4, res5);

+      const __m128i tr0_5 = _mm_unpacklo_epi16(res6, res7);

+      const __m128i tr0_6 = _mm_unpackhi_epi16(res4, res5);

+      const __m128i tr0_7 = _mm_unpackhi_epi16(res6, res7);

+      // 00 10 01 11 02 12 03 13

+      // 20 30 21 31 22 32 23 33

+      // 04 14 05 15 06 16 07 17

+      // 24 34 25 35 26 36 27 37

+      // 40 50 41 51 42 52 43 53

+      // 60 70 61 71 62 72 63 73

+      // 54 54 55 55 56 56 57 57

+      // 64 74 65 75 66 76 67 77

+      const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1);

+      const __m128i tr1_1 = _mm_unpacklo_epi32(tr0_2, tr0_3);

+      const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1);

+      const __m128i tr1_3 = _mm_unpackhi_epi32(tr0_2, tr0_3);

+      const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_4, tr0_5);

+      const __m128i tr1_5 = _mm_unpacklo_epi32(tr0_6, tr0_7);

+      const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_4, tr0_5);

+      const __m128i tr1_7 = _mm_unpackhi_epi32(tr0_6, tr0_7);

+      // 00 10 20 30 01 11 21 31

+      // 40 50 60 70 41 51 61 71

+      // 02 12 22 32 03 13 23 33

+      // 42 52 62 72 43 53 63 73

+      // 04 14 24 34 05 15 21 36

+      // 44 54 64 74 45 55 61 76

+      // 06 16 26 36 07 17 27 37

+      // 46 56 66 76 47 57 67 77

+      in0 = _mm_unpacklo_epi64(tr1_0, tr1_4);

+      in1 = _mm_unpackhi_epi64(tr1_0, tr1_4);

+      in2 = _mm_unpacklo_epi64(tr1_2, tr1_6);

+      in3 = _mm_unpackhi_epi64(tr1_2, tr1_6);

+      in4 = _mm_unpacklo_epi64(tr1_1, tr1_5);

+      in5 = _mm_unpackhi_epi64(tr1_1, tr1_5);

+      in6 = _mm_unpacklo_epi64(tr1_3, tr1_7);

+      in7 = _mm_unpackhi_epi64(tr1_3, tr1_7);

+      // 00 10 20 30 40 50 60 70

+      // 01 11 21 31 41 51 61 71

+      // 02 12 22 32 42 52 62 72

+      // 03 13 23 33 43 53 63 73

+      // 04 14 24 34 44 54 64 74

+      // 05 15 25 35 45 55 65 75

+      // 06 16 26 36 46 56 66 76

+      // 07 17 27 37 47 57 67 77

+    }

+  }

+  // Post-condition output and store it

+  {

+    // Post-condition (division by two)

+    //    division of two 16 bits signed numbers using shifts

+    //    n / 2 = (n - (n >> 15)) >> 1

+    const __m128i sign_in0 = _mm_srai_epi16(in0, 15);

+    const __m128i sign_in1 = _mm_srai_epi16(in1, 15);

+    const __m128i sign_in2 = _mm_srai_epi16(in2, 15);

+    const __m128i sign_in3 = _mm_srai_epi16(in3, 15);

+    const __m128i sign_in4 = _mm_srai_epi16(in4, 15);

+    const __m128i sign_in5 = _mm_srai_epi16(in5, 15);

+    const __m128i sign_in6 = _mm_srai_epi16(in6, 15);

+    const __m128i sign_in7 = _mm_srai_epi16(in7, 15);

+    in0 = _mm_sub_epi16(in0, sign_in0);

+    in1 = _mm_sub_epi16(in1, sign_in1);

+    in2 = _mm_sub_epi16(in2, sign_in2);

+    in3 = _mm_sub_epi16(in3, sign_in3);

+    in4 = _mm_sub_epi16(in4, sign_in4);

+    in5 = _mm_sub_epi16(in5, sign_in5);

+    in6 = _mm_sub_epi16(in6, sign_in6);

+    in7 = _mm_sub_epi16(in7, sign_in7);

+    in0 = _mm_srai_epi16(in0, 1);

+    in1 = _mm_srai_epi16(in1, 1);

+    in2 = _mm_srai_epi16(in2, 1);

+    in3 = _mm_srai_epi16(in3, 1);

+    in4 = _mm_srai_epi16(in4, 1);

+    in5 = _mm_srai_epi16(in5, 1);

+    in6 = _mm_srai_epi16(in6, 1);

+    in7 = _mm_srai_epi16(in7, 1);

+  }

+  iscan_ptr += n_coeffs;

+  qcoeff_ptr += n_coeffs;

+  dqcoeff_ptr += n_coeffs;

+  n_coeffs = -n_coeffs;

+  zero = _mm_setzero_si128();

+  if (!skip_block) {

+    __m128i eob;

+    __m128i round, quant, dequant;

+    {

+      __m128i coeff0, coeff1;

+      // Setup global values

+      {

+        round = _mm_load_si128((const __m128i*)round_ptr);

+        quant = _mm_load_si128((const __m128i*)quant_ptr);

+        dequant = _mm_load_si128((const __m128i*)dequant_ptr);

+      }

+      {

+        __m128i coeff0_sign, coeff1_sign;

+        __m128i qcoeff0, qcoeff1;

+        __m128i qtmp0, qtmp1;

+        // Do DC and first 15 AC

+        coeff0 = *in[0];

+        coeff1 = *in[1];

+        // Poor man's sign extract

+        coeff0_sign = _mm_srai_epi16(coeff0, 15);

+        coeff1_sign = _mm_srai_epi16(coeff1, 15);

+        qcoeff0 = _mm_xor_si128(coeff0, coeff0_sign);

+        qcoeff1 = _mm_xor_si128(coeff1, coeff1_sign);

+        qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);

+        qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);

+        qcoeff0 = _mm_adds_epi16(qcoeff0, round);

+        round = _mm_unpackhi_epi64(round, round);

+        qcoeff1 = _mm_adds_epi16(qcoeff1, round);

+        qtmp0 = _mm_mulhi_epi16(qcoeff0, quant);

+        quant = _mm_unpackhi_epi64(quant, quant);

+        qtmp1 = _mm_mulhi_epi16(qcoeff1, quant);

+        // Reinsert signs

+        qcoeff0 = _mm_xor_si128(qtmp0, coeff0_sign);

+        qcoeff1 = _mm_xor_si128(qtmp1, coeff1_sign);

+        qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);

+        qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);

+        _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), qcoeff0);

+        _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, qcoeff1);

+        coeff0 = _mm_mullo_epi16(qcoeff0, dequant);

+        dequant = _mm_unpackhi_epi64(dequant, dequant);

+        coeff1 = _mm_mullo_epi16(qcoeff1, dequant);

+        _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), coeff0);

+        _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, coeff1);

+      }

+      {

+        // Scan for eob

+        __m128i zero_coeff0, zero_coeff1;

+        __m128i nzero_coeff0, nzero_coeff1;

+        __m128i iscan0, iscan1;

+        __m128i eob1;

+        zero_coeff0 = _mm_cmpeq_epi16(coeff0, zero);

+        zero_coeff1 = _mm_cmpeq_epi16(coeff1, zero);

+        nzero_coeff0 = _mm_cmpeq_epi16(zero_coeff0, zero);

+        nzero_coeff1 = _mm_cmpeq_epi16(zero_coeff1, zero);

+        iscan0 = _mm_load_si128((const __m128i*)(iscan_ptr + n_coeffs));

+        iscan1 = _mm_load_si128((const __m128i*)(iscan_ptr + n_coeffs) + 1);

+        // Add one to convert from indices to counts

+        iscan0 = _mm_sub_epi16(iscan0, nzero_coeff0);

+        iscan1 = _mm_sub_epi16(iscan1, nzero_coeff1);

+        eob = _mm_and_si128(iscan0, nzero_coeff0);

+        eob1 = _mm_and_si128(iscan1, nzero_coeff1);

+        eob = _mm_max_epi16(eob, eob1);

+      }

+      n_coeffs += 8 * 2;

+    }

+    // AC only loop

+    index = 2;

+    while (n_coeffs < 0) {

+      __m128i coeff0, coeff1;

+      {

+        __m128i coeff0_sign, coeff1_sign;

+        __m128i qcoeff0, qcoeff1;

+        __m128i qtmp0, qtmp1;

+        assert(index < (int)(sizeof(in) / sizeof(in[0])) - 1);

+        coeff0 = *in[index];

+        coeff1 = *in[index + 1];

+        // Poor man's sign extract

+        coeff0_sign = _mm_srai_epi16(coeff0, 15);

+        coeff1_sign = _mm_srai_epi16(coeff1, 15);

+        qcoeff0 = _mm_xor_si128(coeff0, coeff0_sign);

+        qcoeff1 = _mm_xor_si128(coeff1, coeff1_sign);

+        qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);

+        qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);

+        qcoeff0 = _mm_adds_epi16(qcoeff0, round);

+        qcoeff1 = _mm_adds_epi16(qcoeff1, round);

+        qtmp0 = _mm_mulhi_epi16(qcoeff0, quant);

+        qtmp1 = _mm_mulhi_epi16(qcoeff1, quant);

+        // Reinsert signs

+        qcoeff0 = _mm_xor_si128(qtmp0, coeff0_sign);

+        qcoeff1 = _mm_xor_si128(qtmp1, coeff1_sign);

+        qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);

+        qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);

+        _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), qcoeff0);

+        _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, qcoeff1);

+        coeff0 = _mm_mullo_epi16(qcoeff0, dequant);

+        coeff1 = _mm_mullo_epi16(qcoeff1, dequant);

+        _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), coeff0);

+        _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, coeff1);

+      }

+      {

+        // Scan for eob

+        __m128i zero_coeff0, zero_coeff1;

+        __m128i nzero_coeff0, nzero_coeff1;

+        __m128i iscan0, iscan1;

+        __m128i eob0, eob1;

+        zero_coeff0 = _mm_cmpeq_epi16(coeff0, zero);

+        zero_coeff1 = _mm_cmpeq_epi16(coeff1, zero);

+        nzero_coeff0 = _mm_cmpeq_epi16(zero_coeff0, zero);

+        nzero_coeff1 = _mm_cmpeq_epi16(zero_coeff1, zero);

+        iscan0 = _mm_load_si128((const __m128i*)(iscan_ptr + n_coeffs));

+        iscan1 = _mm_load_si128((const __m128i*)(iscan_ptr + n_coeffs) + 1);

+        // Add one to convert from indices to counts

+        iscan0 = _mm_sub_epi16(iscan0, nzero_coeff0);

+        iscan1 = _mm_sub_epi16(iscan1, nzero_coeff1);

+        eob0 = _mm_and_si128(iscan0, nzero_coeff0);

+        eob1 = _mm_and_si128(iscan1, nzero_coeff1);

+        eob0 = _mm_max_epi16(eob0, eob1);

+        eob = _mm_max_epi16(eob, eob0);

+      }

+      n_coeffs += 8 * 2;

+      index += 2;

+    }

+    // Accumulate EOB

+    {

+      __m128i eob_shuffled;

+      eob_shuffled = _mm_shuffle_epi32(eob, 0xe);

+      eob = _mm_max_epi16(eob, eob_shuffled);

+      eob_shuffled = _mm_shufflelo_epi16(eob, 0xe);

+      eob = _mm_max_epi16(eob, eob_shuffled);

+      eob_shuffled = _mm_shufflelo_epi16(eob, 0x1);

+      eob = _mm_max_epi16(eob, eob_shuffled);

+      *eob_ptr = _mm_extract_epi16(eob, 1);

+    }

+  } else {

+    do {

+      _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), zero);

+      _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, zero);

+      _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), zero);

+      _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, zero);

+      n_coeffs += 8 * 2;

+    } while (n_coeffs < 0);

+    *eob_ptr = 0;

+  }

+}

+// load 8x8 array

+static INLINE void load_buffer_8x8(const int16_t *input, __m128i *in,

+                                   int stride) {

+  in[0]  = _mm_load_si128((const __m128i *)(input + 0 * stride));

+  in[1]  = _mm_load_si128((const __m128i *)(input + 1 * stride));

+  in[2]  = _mm_load_si128((const __m128i *)(input + 2 * stride));

+  in[3]  = _mm_load_si128((const __m128i *)(input + 3 * stride));

+  in[4]  = _mm_load_si128((const __m128i *)(input + 4 * stride));

+  in[5]  = _mm_load_si128((const __m128i *)(input + 5 * stride));

+  in[6]  = _mm_load_si128((const __m128i *)(input + 6 * stride));

+  in[7]  = _mm_load_si128((const __m128i *)(input + 7 * stride));

+  in[0] = _mm_slli_epi16(in[0], 2);

+  in[1] = _mm_slli_epi16(in[1], 2);

+  in[2] = _mm_slli_epi16(in[2], 2);

+  in[3] = _mm_slli_epi16(in[3], 2);

+  in[4] = _mm_slli_epi16(in[4], 2);

+  in[5] = _mm_slli_epi16(in[5], 2);

+  in[6] = _mm_slli_epi16(in[6], 2);

+  in[7] = _mm_slli_epi16(in[7], 2);

+}

+// right shift and rounding

+static INLINE void right_shift_8x8(__m128i *res, const int bit) {

+  __m128i sign0 = _mm_srai_epi16(res[0], 15);

+  __m128i sign1 = _mm_srai_epi16(res[1], 15);

+  __m128i sign2 = _mm_srai_epi16(res[2], 15);

+  __m128i sign3 = _mm_srai_epi16(res[3], 15);

+  __m128i sign4 = _mm_srai_epi16(res[4], 15);

+  __m128i sign5 = _mm_srai_epi16(res[5], 15);

+  __m128i sign6 = _mm_srai_epi16(res[6], 15);

+  __m128i sign7 = _mm_srai_epi16(res[7], 15);

+  if (bit == 2) {

+    const __m128i const_rounding = _mm_set1_epi16(1);

+    res[0] = _mm_add_epi16(res[0], const_rounding);

+    res[1] = _mm_add_epi16(res[1], const_rounding);

+    res[2] = _mm_add_epi16(res[2], const_rounding);

+    res[3] = _mm_add_epi16(res[3], const_rounding);

+    res[4] = _mm_add_epi16(res[4], const_rounding);

+    res[5] = _mm_add_epi16(res[5], const_rounding);

+    res[6] = _mm_add_epi16(res[6], const_rounding);

+    res[7] = _mm_add_epi16(res[7], const_rounding);

+  }

+  res[0] = _mm_sub_epi16(res[0], sign0);

+  res[1] = _mm_sub_epi16(res[1], sign1);

+  res[2] = _mm_sub_epi16(res[2], sign2);

+  res[3] = _mm_sub_epi16(res[3], sign3);

+  res[4] = _mm_sub_epi16(res[4], sign4);

+  res[5] = _mm_sub_epi16(res[5], sign5);

+  res[6] = _mm_sub_epi16(res[6], sign6);

+  res[7] = _mm_sub_epi16(res[7], sign7);

+  if (bit == 1) {

+    res[0] = _mm_srai_epi16(res[0], 1);

+    res[1] = _mm_srai_epi16(res[1], 1);

+    res[2] = _mm_srai_epi16(res[2], 1);

+    res[3] = _mm_srai_epi16(res[3], 1);

+    res[4] = _mm_srai_epi16(res[4], 1);

+    res[5] = _mm_srai_epi16(res[5], 1);

+    res[6] = _mm_srai_epi16(res[6], 1);

+    res[7] = _mm_srai_epi16(res[7], 1);

+  } else {

+    res[0] = _mm_srai_epi16(res[0], 2);

+    res[1] = _mm_srai_epi16(res[1], 2);

+    res[2] = _mm_srai_epi16(res[2], 2);

+    res[3] = _mm_srai_epi16(res[3], 2);

+    res[4] = _mm_srai_epi16(res[4], 2);

+    res[5] = _mm_srai_epi16(res[5], 2);

+    res[6] = _mm_srai_epi16(res[6], 2);

+    res[7] = _mm_srai_epi16(res[7], 2);

+  }

+}

+// write 8x8 array

+static INLINE void write_buffer_8x8(tran_low_t *output, __m128i *res,

+                                    int stride) {

+  store_output(&res[0], (output + 0 * stride));

+  store_output(&res[1], (output + 1 * stride));

+  store_output(&res[2], (output + 2 * stride));

+  store_output(&res[3], (output + 3 * stride));

+  store_output(&res[4], (output + 4 * stride));

+  store_output(&res[5], (output + 5 * stride));

+  store_output(&res[6], (output + 6 * stride));

+  store_output(&res[7], (output + 7 * stride));

+}

+// perform in-place transpose

+static INLINE void array_transpose_8x8(__m128i *in, __m128i *res) {

+  const __m128i tr0_0 = _mm_unpacklo_epi16(in[0], in[1]);

+  const __m128i tr0_1 = _mm_unpacklo_epi16(in[2], in[3]);

+  const __m128i tr0_2 = _mm_unpackhi_epi16(in[0], in[1]);

+  const __m128i tr0_3 = _mm_unpackhi_epi16(in[2], in[3]);

+  const __m128i tr0_4 = _mm_unpacklo_epi16(in[4], in[5]);

+  const __m128i tr0_5 = _mm_unpacklo_epi16(in[6], in[7]);

+  const __m128i tr0_6 = _mm_unpackhi_epi16(in[4], in[5]);

+  const __m128i tr0_7 = _mm_unpackhi_epi16(in[6], in[7]);

+  // 00 10 01 11 02 12 03 13

+  // 20 30 21 31 22 32 23 33

+  // 04 14 05 15 06 16 07 17

+  // 24 34 25 35 26 36 27 37

+  // 40 50 41 51 42 52 43 53

+  // 60 70 61 71 62 72 63 73

+  // 44 54 45 55 46 56 47 57

+  // 64 74 65 75 66 76 67 77

+  const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1);

+  const __m128i tr1_1 = _mm_unpacklo_epi32(tr0_4, tr0_5);

+  const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1);

+  const __m128i tr1_3 = _mm_unpackhi_epi32(tr0_4, tr0_5);

+  const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_2, tr0_3);

+  const __m128i tr1_5 = _mm_unpacklo_epi32(tr0_6, tr0_7);

+  const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_2, tr0_3);

+  const __m128i tr1_7 = _mm_unpackhi_epi32(tr0_6, tr0_7);

+  // 00 10 20 30 01 11 21 31

+  // 40 50 60 70 41 51 61 71

+  // 02 12 22 32 03 13 23 33

+  // 42 52 62 72 43 53 63 73

+  // 04 14 24 34 05 15 25 35

+  // 44 54 64 74 45 55 65 75

+  // 06 16 26 36 07 17 27 37

+  // 46 56 66 76 47 57 67 77

+  res[0] = _mm_unpacklo_epi64(tr1_0, tr1_1);

+  res[1] = _mm_unpackhi_epi64(tr1_0, tr1_1);

+  res[2] = _mm_unpacklo_epi64(tr1_2, tr1_3);

+  res[3] = _mm_unpackhi_epi64(tr1_2, tr1_3);

+  res[4] = _mm_unpacklo_epi64(tr1_4, tr1_5);

+  res[5] = _mm_unpackhi_epi64(tr1_4, tr1_5);

+  res[6] = _mm_unpacklo_epi64(tr1_6, tr1_7);

+  res[7] = _mm_unpackhi_epi64(tr1_6, tr1_7);

+  // 00 10 20 30 40 50 60 70

+  // 01 11 21 31 41 51 61 71

+  // 02 12 22 32 42 52 62 72

+  // 03 13 23 33 43 53 63 73

+  // 04 14 24 34 44 54 64 74

+  // 05 15 25 35 45 55 65 75

+  // 06 16 26 36 46 56 66 76

+  // 07 17 27 37 47 57 67 77

+}

+static void fdct8_sse2(__m128i *in) {

+  // constants

+  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

+  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

+  const __m128i k__cospi_p24_p08 = pair_set_epi16(cospi_24_64, cospi_8_64);

+  const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64, cospi_24_64);

+  const __m128i k__cospi_p28_p04 = pair_set_epi16(cospi_28_64, cospi_4_64);

+  const __m128i k__cospi_m04_p28 = pair_set_epi16(-cospi_4_64, cospi_28_64);

+  const __m128i k__cospi_p12_p20 = pair_set_epi16(cospi_12_64, cospi_20_64);

+  const __m128i k__cospi_m20_p12 = pair_set_epi16(-cospi_20_64, cospi_12_64);

+  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

+  __m128i u0, u1, u2, u3, u4, u5, u6, u7;

+  __m128i v0, v1, v2, v3, v4, v5, v6, v7;

+  __m128i s0, s1, s2, s3, s4, s5, s6, s7;

+  // stage 1

+  s0 = _mm_add_epi16(in[0], in[7]);

+  s1 = _mm_add_epi16(in[1], in[6]);

+  s2 = _mm_add_epi16(in[2], in[5]);

+  s3 = _mm_add_epi16(in[3], in[4]);

+  s4 = _mm_sub_epi16(in[3], in[4]);

+  s5 = _mm_sub_epi16(in[2], in[5]);

+  s6 = _mm_sub_epi16(in[1], in[6]);

+  s7 = _mm_sub_epi16(in[0], in[7]);

+  u0 = _mm_add_epi16(s0, s3);

+  u1 = _mm_add_epi16(s1, s2);

+  u2 = _mm_sub_epi16(s1, s2);

+  u3 = _mm_sub_epi16(s0, s3);

+  // interleave and perform butterfly multiplication/addition

+  v0 = _mm_unpacklo_epi16(u0, u1);

+  v1 = _mm_unpackhi_epi16(u0, u1);

+  v2 = _mm_unpacklo_epi16(u2, u3);

+  v3 = _mm_unpackhi_epi16(u2, u3);

+  u0 = _mm_madd_epi16(v0, k__cospi_p16_p16);

+  u1 = _mm_madd_epi16(v1, k__cospi_p16_p16);

+  u2 = _mm_madd_epi16(v0, k__cospi_p16_m16);

+  u3 = _mm_madd_epi16(v1, k__cospi_p16_m16);

+  u4 = _mm_madd_epi16(v2, k__cospi_p24_p08);

+  u5 = _mm_madd_epi16(v3, k__cospi_p24_p08);

+  u6 = _mm_madd_epi16(v2, k__cospi_m08_p24);

+  u7 = _mm_madd_epi16(v3, k__cospi_m08_p24);

+  // shift and rounding

+  v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);

+  v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);

+  v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);

+  v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);

+  v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);

+  v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING);

+  v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);

+  v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING);

+  u0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

+  u1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

+  u2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

+  u3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

+  u4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

+  u5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

+  u6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

+  u7 = _mm_srai_epi32(v7, DCT_CONST_BITS);

+  in[0] = _mm_packs_epi32(u0, u1);

+  in[2] = _mm_packs_epi32(u4, u5);

+  in[4] = _mm_packs_epi32(u2, u3);

+  in[6] = _mm_packs_epi32(u6, u7);

+  // stage 2

+  // interleave and perform butterfly multiplication/addition

+  u0 = _mm_unpacklo_epi16(s6, s5);

+  u1 = _mm_unpackhi_epi16(s6, s5);

+  v0 = _mm_madd_epi16(u0, k__cospi_p16_m16);

+  v1 = _mm_madd_epi16(u1, k__cospi_p16_m16);

+  v2 = _mm_madd_epi16(u0, k__cospi_p16_p16);

+  v3 = _mm_madd_epi16(u1, k__cospi_p16_p16);

+  // shift and rounding

+  u0 = _mm_add_epi32(v0, k__DCT_CONST_ROUNDING);

+  u1 = _mm_add_epi32(v1, k__DCT_CONST_ROUNDING);

+  u2 = _mm_add_epi32(v2, k__DCT_CONST_ROUNDING);

+  u3 = _mm_add_epi32(v3, k__DCT_CONST_ROUNDING);

+  v0 = _mm_srai_epi32(u0, DCT_CONST_BITS);

+  v1 = _mm_srai_epi32(u1, DCT_CONST_BITS);

+  v2 = _mm_srai_epi32(u2, DCT_CONST_BITS);

+  v3 = _mm_srai_epi32(u3, DCT_CONST_BITS);

+  u0 = _mm_packs_epi32(v0, v1);

+  u1 = _mm_packs_epi32(v2, v3);

+  // stage 3

+  s0 = _mm_add_epi16(s4, u0);

+  s1 = _mm_sub_epi16(s4, u0);

+  s2 = _mm_sub_epi16(s7, u1);

+  s3 = _mm_add_epi16(s7, u1);

+  // stage 4

+  u0 = _mm_unpacklo_epi16(s0, s3);

+  u1 = _mm_unpackhi_epi16(s0, s3);

+  u2 = _mm_unpacklo_epi16(s1, s2);

+  u3 = _mm_unpackhi_epi16(s1, s2);

+  v0 = _mm_madd_epi16(u0, k__cospi_p28_p04);

+  v1 = _mm_madd_epi16(u1, k__cospi_p28_p04);

+  v2 = _mm_madd_epi16(u2, k__cospi_p12_p20);

+  v3 = _mm_madd_epi16(u3, k__cospi_p12_p20);

+  v4 = _mm_madd_epi16(u2, k__cospi_m20_p12);

+  v5 = _mm_madd_epi16(u3, k__cospi_m20_p12);

+  v6 = _mm_madd_epi16(u0, k__cospi_m04_p28);

+  v7 = _mm_madd_epi16(u1, k__cospi_m04_p28);

+  // shift and rounding

+  u0 = _mm_add_epi32(v0, k__DCT_CONST_ROUNDING);

+  u1 = _mm_add_epi32(v1, k__DCT_CONST_ROUNDING);

+  u2 = _mm_add_epi32(v2, k__DCT_CONST_ROUNDING);

+  u3 = _mm_add_epi32(v3, k__DCT_CONST_ROUNDING);

+  u4 = _mm_add_epi32(v4, k__DCT_CONST_ROUNDING);

+  u5 = _mm_add_epi32(v5, k__DCT_CONST_ROUNDING);

+  u6 = _mm_add_epi32(v6, k__DCT_CONST_ROUNDING);

+  u7 = _mm_add_epi32(v7, k__DCT_CONST_ROUNDING);

+  v0 = _mm_srai_epi32(u0, DCT_CONST_BITS);

+  v1 = _mm_srai_epi32(u1, DCT_CONST_BITS);

+  v2 = _mm_srai_epi32(u2, DCT_CONST_BITS);

+  v3 = _mm_srai_epi32(u3, DCT_CONST_BITS);

+  v4 = _mm_srai_epi32(u4, DCT_CONST_BITS);

+  v5 = _mm_srai_epi32(u5, DCT_CONST_BITS);

+  v6 = _mm_srai_epi32(u6, DCT_CONST_BITS);

+  v7 = _mm_srai_epi32(u7, DCT_CONST_BITS);

+  in[1] = _mm_packs_epi32(v0, v1);

+  in[3] = _mm_packs_epi32(v4, v5);

+  in[5] = _mm_packs_epi32(v2, v3);

+  in[7] = _mm_packs_epi32(v6, v7);

+  // transpose

+  array_transpose_8x8(in, in);

+}

+static void fadst8_sse2(__m128i *in) {

+  // Constants

+  const __m128i k__cospi_p02_p30 = pair_set_epi16(cospi_2_64, cospi_30_64);

+  const __m128i k__cospi_p30_m02 = pair_set_epi16(cospi_30_64, -cospi_2_64);

+  const __m128i k__cospi_p10_p22 = pair_set_epi16(cospi_10_64, cospi_22_64);

+  const __m128i k__cospi_p22_m10 = pair_set_epi16(cospi_22_64, -cospi_10_64);

+  const __m128i k__cospi_p18_p14 = pair_set_epi16(cospi_18_64, cospi_14_64);

+  const __m128i k__cospi_p14_m18 = pair_set_epi16(cospi_14_64, -cospi_18_64);

+  const __m128i k__cospi_p26_p06 = pair_set_epi16(cospi_26_64, cospi_6_64);

+  const __m128i k__cospi_p06_m26 = pair_set_epi16(cospi_6_64, -cospi_26_64);

+  const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);

+  const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);

+  const __m128i k__cospi_m24_p08 = pair_set_epi16(-cospi_24_64, cospi_8_64);

+  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

+  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

+  const __m128i k__const_0 = _mm_set1_epi16(0);

+  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

+  __m128i u0, u1, u2, u3, u4, u5, u6, u7, u8, u9, u10, u11, u12, u13, u14, u15;

+  __m128i v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15;

+  __m128i w0, w1, w2, w3, w4, w5, w6, w7, w8, w9, w10, w11, w12, w13, w14, w15;

+  __m128i s0, s1, s2, s3, s4, s5, s6, s7;

+  __m128i in0, in1, in2, in3, in4, in5, in6, in7;

+  // properly aligned for butterfly input

+  in0  = in[7];

+  in1  = in[0];

+  in2  = in[5];

+  in3  = in[2];

+  in4  = in[3];

+  in5  = in[4];

+  in6  = in[1];

+  in7  = in[6];

+  // column transformation

+  // stage 1

+  // interleave and multiply/add into 32-bit integer

+  s0 = _mm_unpacklo_epi16(in0, in1);

+  s1 = _mm_unpackhi_epi16(in0, in1);

+  s2 = _mm_unpacklo_epi16(in2, in3);

+  s3 = _mm_unpackhi_epi16(in2, in3);

+  s4 = _mm_unpacklo_epi16(in4, in5);

+  s5 = _mm_unpackhi_epi16(in4, in5);

+  s6 = _mm_unpacklo_epi16(in6, in7);

+  s7 = _mm_unpackhi_epi16(in6, in7);

+  u0 = _mm_madd_epi16(s0, k__cospi_p02_p30);

+  u1 = _mm_madd_epi16(s1, k__cospi_p02_p30);

+  u2 = _mm_madd_epi16(s0, k__cospi_p30_m02);

+  u3 = _mm_madd_epi16(s1, k__cospi_p30_m02);

+  u4 = _mm_madd_epi16(s2, k__cospi_p10_p22);

+  u5 = _mm_madd_epi16(s3, k__cospi_p10_p22);

+  u6 = _mm_madd_epi16(s2, k__cospi_p22_m10);

+  u7 = _mm_madd_epi16(s3, k__cospi_p22_m10);

+  u8 = _mm_madd_epi16(s4, k__cospi_p18_p14);

+  u9 = _mm_madd_epi16(s5, k__cospi_p18_p14);

+  u10 = _mm_madd_epi16(s4, k__cospi_p14_m18);

+  u11 = _mm_madd_epi16(s5, k__cospi_p14_m18);

+  u12 = _mm_madd_epi16(s6, k__cospi_p26_p06);

+  u13 = _mm_madd_epi16(s7, k__cospi_p26_p06);

+  u14 = _mm_madd_epi16(s6, k__cospi_p06_m26);

+  u15 = _mm_madd_epi16(s7, k__cospi_p06_m26);

+  // addition

+  w0 = _mm_add_epi32(u0, u8);

+  w1 = _mm_add_epi32(u1, u9);

+  w2 = _mm_add_epi32(u2, u10);

+  w3 = _mm_add_epi32(u3, u11);

+  w4 = _mm_add_epi32(u4, u12);

+  w5 = _mm_add_epi32(u5, u13);

+  w6 = _mm_add_epi32(u6, u14);

+  w7 = _mm_add_epi32(u7, u15);

+  w8 = _mm_sub_epi32(u0, u8);

+  w9 = _mm_sub_epi32(u1, u9);

+  w10 = _mm_sub_epi32(u2, u10);

+  w11 = _mm_sub_epi32(u3, u11);

+  w12 = _mm_sub_epi32(u4, u12);

+  w13 = _mm_sub_epi32(u5, u13);

+  w14 = _mm_sub_epi32(u6, u14);

+  w15 = _mm_sub_epi32(u7, u15);

+  // shift and rounding

+  v0 = _mm_add_epi32(w0, k__DCT_CONST_ROUNDING);

+  v1 = _mm_add_epi32(w1, k__DCT_CONST_ROUNDING);

+  v2 = _mm_add_epi32(w2, k__DCT_CONST_ROUNDING);

+  v3 = _mm_add_epi32(w3, k__DCT_CONST_ROUNDING);

+  v4 = _mm_add_epi32(w4, k__DCT_CONST_ROUNDING);

+  v5 = _mm_add_epi32(w5, k__DCT_CONST_ROUNDING);

+  v6 = _mm_add_epi32(w6, k__DCT_CONST_ROUNDING);

+  v7 = _mm_add_epi32(w7, k__DCT_CONST_ROUNDING);

+  v8 = _mm_add_epi32(w8, k__DCT_CONST_ROUNDING);

+  v9 = _mm_add_epi32(w9, k__DCT_CONST_ROUNDING);

+  v10 = _mm_add_epi32(w10, k__DCT_CONST_ROUNDING);

+  v11 = _mm_add_epi32(w11, k__DCT_CONST_ROUNDING);

+  v12 = _mm_add_epi32(w12, k__DCT_CONST_ROUNDING);

+  v13 = _mm_add_epi32(w13, k__DCT_CONST_ROUNDING);

+  v14 = _mm_add_epi32(w14, k__DCT_CONST_ROUNDING);

+  v15 = _mm_add_epi32(w15, k__DCT_CONST_ROUNDING);

+  u0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

+  u1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

+  u2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

+  u3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

+  u4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

+  u5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

+  u6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

+  u7 = _mm_srai_epi32(v7, DCT_CONST_BITS);

+  u8 = _mm_srai_epi32(v8, DCT_CONST_BITS);

+  u9 = _mm_srai_epi32(v9, DCT_CONST_BITS);

+  u10 = _mm_srai_epi32(v10, DCT_CONST_BITS);

+  u11 = _mm_srai_epi32(v11, DCT_CONST_BITS);

+  u12 = _mm_srai_epi32(v12, DCT_CONST_BITS);

+  u13 = _mm_srai_epi32(v13, DCT_CONST_BITS);

+  u14 = _mm_srai_epi32(v14, DCT_CONST_BITS);

+  u15 = _mm_srai_epi32(v15, DCT_CONST_BITS);

+  // back to 16-bit and pack 8 integers into __m128i

+  in[0] = _mm_packs_epi32(u0, u1);

+  in[1] = _mm_packs_epi32(u2, u3);

+  in[2] = _mm_packs_epi32(u4, u5);

+  in[3] = _mm_packs_epi32(u6, u7);

+  in[4] = _mm_packs_epi32(u8, u9);

+  in[5] = _mm_packs_epi32(u10, u11);

+  in[6] = _mm_packs_epi32(u12, u13);

+  in[7] = _mm_packs_epi32(u14, u15);

+  // stage 2

+  s0 = _mm_add_epi16(in[0], in[2]);

+  s1 = _mm_add_epi16(in[1], in[3]);

+  s2 = _mm_sub_epi16(in[0], in[2]);

+  s3 = _mm_sub_epi16(in[1], in[3]);

+  u0 = _mm_unpacklo_epi16(in[4], in[5]);

+  u1 = _mm_unpackhi_epi16(in[4], in[5]);

+  u2 = _mm_unpacklo_epi16(in[6], in[7]);

+  u3 = _mm_unpackhi_epi16(in[6], in[7]);

+  v0 = _mm_madd_epi16(u0, k__cospi_p08_p24);

+  v1 = _mm_madd_epi16(u1, k__cospi_p08_p24);

+  v2 = _mm_madd_epi16(u0, k__cospi_p24_m08);

+  v3 = _mm_madd_epi16(u1, k__cospi_p24_m08);

+  v4 = _mm_madd_epi16(u2, k__cospi_m24_p08);

+  v5 = _mm_madd_epi16(u3, k__cospi_m24_p08);

+  v6 = _mm_madd_epi16(u2, k__cospi_p08_p24);

+  v7 = _mm_madd_epi16(u3, k__cospi_p08_p24);

+  w0 = _mm_add_epi32(v0, v4);

+  w1 = _mm_add_epi32(v1, v5);

+  w2 = _mm_add_epi32(v2, v6);

+  w3 = _mm_add_epi32(v3, v7);

+  w4 = _mm_sub_epi32(v0, v4);

+  w5 = _mm_sub_epi32(v1, v5);

+  w6 = _mm_sub_epi32(v2, v6);

+  w7 = _mm_sub_epi32(v3, v7);

+  v0 = _mm_add_epi32(w0, k__DCT_CONST_ROUNDING);

+  v1 = _mm_add_epi32(w1, k__DCT_CONST_ROUNDING);

+  v2 = _mm_add_epi32(w2, k__DCT_CONST_ROUNDING);

+  v3 = _mm_add_epi32(w3, k__DCT_CONST_ROUNDING);

+  v4 = _mm_add_epi32(w4, k__DCT_CONST_ROUNDING);

+  v5 = _mm_add_epi32(w5, k__DCT_CONST_ROUNDING);

+  v6 = _mm_add_epi32(w6, k__DCT_CONST_ROUNDING);

+  v7 = _mm_add_epi32(w7, k__DCT_CONST_ROUNDING);

+  u0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

+  u1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

+  u2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

+  u3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

+  u4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

+  u5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

+  u6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

+  u7 = _mm_srai_epi32(v7, DCT_CONST_BITS);

+  // back to 16-bit intergers

+  s4 = _mm_packs_epi32(u0, u1);

+  s5 = _mm_packs_epi32(u2, u3);

+  s6 = _mm_packs_epi32(u4, u5);

+  s7 = _mm_packs_epi32(u6, u7);

+  // stage 3

+  u0 = _mm_unpacklo_epi16(s2, s3);

+  u1 = _mm_unpackhi_epi16(s2, s3);

+  u2 = _mm_unpacklo_epi16(s6, s7);

+  u3 = _mm_unpackhi_epi16(s6, s7);

+  v0 = _mm_madd_epi16(u0, k__cospi_p16_p16);

+  v1 = _mm_madd_epi16(u1, k__cospi_p16_p16);

+  v2 = _mm_madd_epi16(u0, k__cospi_p16_m16);

+  v3 = _mm_madd_epi16(u1, k__cospi_p16_m16);

+  v4 = _mm_madd_epi16(u2, k__cospi_p16_p16);

+  v5 = _mm_madd_epi16(u3, k__cospi_p16_p16);

+  v6 = _mm_madd_epi16(u2, k__cospi_p16_m16);

+  v7 = _mm_madd_epi16(u3, k__cospi_p16_m16);

+  u0 = _mm_add_epi32(v0, k__DCT_CONST_ROUNDING);

+  u1 = _mm_add_epi32(v1, k__DCT_CONST_ROUNDING);

+  u2 = _mm_add_epi32(v2, k__DCT_CONST_ROUNDING);

+  u3 = _mm_add_epi32(v3, k__DCT_CONST_ROUNDING);

+  u4 = _mm_add_epi32(v4, k__DCT_CONST_ROUNDING);

+  u5 = _mm_add_epi32(v5, k__DCT_CONST_ROUNDING);

+  u6 = _mm_add_epi32(v6, k__DCT_CONST_ROUNDING);

+  u7 = _mm_add_epi32(v7, k__DCT_CONST_ROUNDING);

+  v0 = _mm_srai_epi32(u0, DCT_CONST_BITS);

+  v1 = _mm_srai_epi32(u1, DCT_CONST_BITS);

+  v2 = _mm_srai_epi32(u2, DCT_CONST_BITS);

+  v3 = _mm_srai_epi32(u3, DCT_CONST_BITS);

+  v4 = _mm_srai_epi32(u4, DCT_CONST_BITS);

+  v5 = _mm_srai_epi32(u5, DCT_CONST_BITS);

+  v6 = _mm_srai_epi32(u6, DCT_CONST_BITS);

+  v7 = _mm_srai_epi32(u7, DCT_CONST_BITS);

+  s2 = _mm_packs_epi32(v0, v1);

+  s3 = _mm_packs_epi32(v2, v3);

+  s6 = _mm_packs_epi32(v4, v5);

+  s7 = _mm_packs_epi32(v6, v7);

+  // FIXME(jingning): do subtract using bit inversion?

+  in[0] = s0;

+  in[1] = _mm_sub_epi16(k__const_0, s4);

+  in[2] = s6;

+  in[3] = _mm_sub_epi16(k__const_0, s2);

+  in[4] = s3;

+  in[5] = _mm_sub_epi16(k__const_0, s7);

+  in[6] = s5;

+  in[7] = _mm_sub_epi16(k__const_0, s1);

+  // transpose

+  array_transpose_8x8(in, in);

+}

+void vp9_fht8x8_sse2(const int16_t *input, tran_low_t *output,

+                     int stride, int tx_type) {

+  __m128i in[8];

+  switch (tx_type) {

+    case DCT_DCT:

+      vpx_fdct8x8_sse2(input, output, stride);

+      break;

+    case ADST_DCT:

+      load_buffer_8x8(input, in, stride);

+      fadst8_sse2(in);

+      fdct8_sse2(in);

+      right_shift_8x8(in, 1);

+      write_buffer_8x8(output, in, 8);

+      break;

+    case DCT_ADST:

+      load_buffer_8x8(input, in, stride);

+      fdct8_sse2(in);

+      fadst8_sse2(in);

+      right_shift_8x8(in, 1);

+      write_buffer_8x8(output, in, 8);

+      break;

+    case ADST_ADST:

+      load_buffer_8x8(input, in, stride);

+      fadst8_sse2(in);

+      fadst8_sse2(in);

+      right_shift_8x8(in, 1);

+      write_buffer_8x8(output, in, 8);

+      break;

+    default:

+      assert(0);

+      break;

+  }

+}

+static INLINE void load_buffer_16x16(const int16_t* input, __m128i *in0,

+                                     __m128i *in1, int stride) {

+  // load first 8 columns

+  load_buffer_8x8(input, in0, stride);

+  load_buffer_8x8(input + 8 * stride, in0 + 8, stride);

+  input += 8;

+  // load second 8 columns

+  load_buffer_8x8(input, in1, stride);

+  load_buffer_8x8(input + 8 * stride, in1 + 8, stride);

+}

+static INLINE void write_buffer_16x16(tran_low_t *output, __m128i *in0,

+                                      __m128i *in1, int stride) {

+  // write first 8 columns

+  write_buffer_8x8(output, in0, stride);

+  write_buffer_8x8(output + 8 * stride, in0 + 8, stride);

+  // write second 8 columns

+  output += 8;

+  write_buffer_8x8(output, in1, stride);

+  write_buffer_8x8(output + 8 * stride, in1 + 8, stride);

+}

+static INLINE void array_transpose_16x16(__m128i *res0, __m128i *res1) {

+  __m128i tbuf[8];

+  array_transpose_8x8(res0, res0);

+  array_transpose_8x8(res1, tbuf);

+  array_transpose_8x8(res0 + 8, res1);

+  array_transpose_8x8(res1 + 8, res1 + 8);

+  res0[8] = tbuf[0];

+  res0[9] = tbuf[1];

+  res0[10] = tbuf[2];

+  res0[11] = tbuf[3];

+  res0[12] = tbuf[4];

+  res0[13] = tbuf[5];

+  res0[14] = tbuf[6];

+  res0[15] = tbuf[7];

+}

+static INLINE void right_shift_16x16(__m128i *res0, __m128i *res1) {

+  // perform rounding operations

+  right_shift_8x8(res0, 2);

+  right_shift_8x8(res0 + 8, 2);

+  right_shift_8x8(res1, 2);

+  right_shift_8x8(res1 + 8, 2);

+}

+static void fdct16_8col(__m128i *in) {

+  // perform 16x16 1-D DCT for 8 columns

+  __m128i i[8], s[8], p[8], t[8], u[16], v[16];

+  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

+  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

+  const __m128i k__cospi_m16_p16 = pair_set_epi16(-cospi_16_64, cospi_16_64);

+  const __m128i k__cospi_p24_p08 = pair_set_epi16(cospi_24_64, cospi_8_64);

+  const __m128i k__cospi_p08_m24 = pair_set_epi16(cospi_8_64, -cospi_24_64);

+  const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64, cospi_24_64);

+  const __m128i k__cospi_p28_p04 = pair_set_epi16(cospi_28_64, cospi_4_64);

+  const __m128i k__cospi_m04_p28 = pair_set_epi16(-cospi_4_64, cospi_28_64);

+  const __m128i k__cospi_p12_p20 = pair_set_epi16(cospi_12_64, cospi_20_64);

+  const __m128i k__cospi_m20_p12 = pair_set_epi16(-cospi_20_64, cospi_12_64);

+  const __m128i k__cospi_p30_p02 = pair_set_epi16(cospi_30_64, cospi_2_64);

+  const __m128i k__cospi_p14_p18 = pair_set_epi16(cospi_14_64, cospi_18_64);

+  const __m128i k__cospi_m02_p30 = pair_set_epi16(-cospi_2_64, cospi_30_64);

+  const __m128i k__cospi_m18_p14 = pair_set_epi16(-cospi_18_64, cospi_14_64);

+  const __m128i k__cospi_p22_p10 = pair_set_epi16(cospi_22_64, cospi_10_64);

+  const __m128i k__cospi_p06_p26 = pair_set_epi16(cospi_6_64, cospi_26_64);

+  const __m128i k__cospi_m10_p22 = pair_set_epi16(-cospi_10_64, cospi_22_64);

+  const __m128i k__cospi_m26_p06 = pair_set_epi16(-cospi_26_64, cospi_6_64);

+  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

+  // stage 1

+  i[0] = _mm_add_epi16(in[0], in[15]);

+  i[1] = _mm_add_epi16(in[1], in[14]);

+  i[2] = _mm_add_epi16(in[2], in[13]);

+  i[3] = _mm_add_epi16(in[3], in[12]);

+  i[4] = _mm_add_epi16(in[4], in[11]);

+  i[5] = _mm_add_epi16(in[5], in[10]);

+  i[6] = _mm_add_epi16(in[6], in[9]);

+  i[7] = _mm_add_epi16(in[7], in[8]);

+  s[0] = _mm_sub_epi16(in[7], in[8]);

+  s[1] = _mm_sub_epi16(in[6], in[9]);

+  s[2] = _mm_sub_epi16(in[5], in[10]);

+  s[3] = _mm_sub_epi16(in[4], in[11]);

+  s[4] = _mm_sub_epi16(in[3], in[12]);

+  s[5] = _mm_sub_epi16(in[2], in[13]);

+  s[6] = _mm_sub_epi16(in[1], in[14]);

+  s[7] = _mm_sub_epi16(in[0], in[15]);

+  p[0] = _mm_add_epi16(i[0], i[7]);

+  p[1] = _mm_add_epi16(i[1], i[6]);

+  p[2] = _mm_add_epi16(i[2], i[5]);

+  p[3] = _mm_add_epi16(i[3], i[4]);

+  p[4] = _mm_sub_epi16(i[3], i[4]);

+  p[5] = _mm_sub_epi16(i[2], i[5]);

+  p[6] = _mm_sub_epi16(i[1], i[6]);

+  p[7] = _mm_sub_epi16(i[0], i[7]);

+  u[0] = _mm_add_epi16(p[0], p[3]);

+  u[1] = _mm_add_epi16(p[1], p[2]);

+  u[2] = _mm_sub_epi16(p[1], p[2]);

+  u[3] = _mm_sub_epi16(p[0], p[3]);

+  v[0] = _mm_unpacklo_epi16(u[0], u[1]);

+  v[1] = _mm_unpackhi_epi16(u[0], u[1]);

+  v[2] = _mm_unpacklo_epi16(u[2], u[3]);

+  v[3] = _mm_unpackhi_epi16(u[2], u[3]);

+  u[0] = _mm_madd_epi16(v[0], k__cospi_p16_p16);

+  u[1] = _mm_madd_epi16(v[1], k__cospi_p16_p16);

+  u[2] = _mm_madd_epi16(v[0], k__cospi_p16_m16);

+  u[3] = _mm_madd_epi16(v[1], k__cospi_p16_m16);

+  u[4] = _mm_madd_epi16(v[2], k__cospi_p24_p08);

+  u[5] = _mm_madd_epi16(v[3], k__cospi_p24_p08);

+  u[6] = _mm_madd_epi16(v[2], k__cospi_m08_p24);

+  u[7] = _mm_madd_epi16(v[3], k__cospi_m08_p24);

+  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

+  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

+  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

+  v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

+  v[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);

+  v[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);

+  v[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);

+  v[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);

+  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

+  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

+  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

+  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);

+  u[4] = _mm_srai_epi32(v[4], DCT_CONST_BITS);

+  u[5] = _mm_srai_epi32(v[5], DCT_CONST_BITS);

+  u[6] = _mm_srai_epi32(v[6], DCT_CONST_BITS);

+  u[7] = _mm_srai_epi32(v[7], DCT_CONST_BITS);

+  in[0] = _mm_packs_epi32(u[0], u[1]);

+  in[4] = _mm_packs_epi32(u[4], u[5]);

+  in[8] = _mm_packs_epi32(u[2], u[3]);

+  in[12] = _mm_packs_epi32(u[6], u[7]);

+  u[0] = _mm_unpacklo_epi16(p[5], p[6]);

+  u[1] = _mm_unpackhi_epi16(p[5], p[6]);

+  v[0] = _mm_madd_epi16(u[0], k__cospi_m16_p16);

+  v[1] = _mm_madd_epi16(u[1], k__cospi_m16_p16);

+  v[2] = _mm_madd_epi16(u[0], k__cospi_p16_p16);

+  v[3] = _mm_madd_epi16(u[1], k__cospi_p16_p16);

+  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

+  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

+  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

+  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

+  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

+  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

+  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

+  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

+  u[0] = _mm_packs_epi32(v[0], v[1]);

+  u[1] = _mm_packs_epi32(v[2], v[3]);

+  t[0] = _mm_add_epi16(p[4], u[0]);

+  t[1] = _mm_sub_epi16(p[4], u[0]);

+  t[2] = _mm_sub_epi16(p[7], u[1]);

+  t[3] = _mm_add_epi16(p[7], u[1]);

+  u[0] = _mm_unpacklo_epi16(t[0], t[3]);

+  u[1] = _mm_unpackhi_epi16(t[0], t[3]);

+  u[2] = _mm_unpacklo_epi16(t[1], t[2]);

+  u[3] = _mm_unpackhi_epi16(t[1], t[2]);

+  v[0] = _mm_madd_epi16(u[0], k__cospi_p28_p04);

+  v[1] = _mm_madd_epi16(u[1], k__cospi_p28_p04);

+  v[2] = _mm_madd_epi16(u[2], k__cospi_p12_p20);

+  v[3] = _mm_madd_epi16(u[3], k__cospi_p12_p20);

+  v[4] = _mm_madd_epi16(u[2], k__cospi_m20_p12);

+  v[5] = _mm_madd_epi16(u[3], k__cospi_m20_p12);

+  v[6] = _mm_madd_epi16(u[0], k__cospi_m04_p28);

+  v[7] = _mm_madd_epi16(u[1], k__cospi_m04_p28);

+  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

+  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

+  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

+  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

+  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

+  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

+  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

+  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);

+  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

+  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

+  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

+  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

+  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

+  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

+  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

+  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

+  in[2] = _mm_packs_epi32(v[0], v[1]);

+  in[6] = _mm_packs_epi32(v[4], v[5]);

+  in[10] = _mm_packs_epi32(v[2], v[3]);

+  in[14] = _mm_packs_epi32(v[6], v[7]);

+  // stage 2

+  u[0] = _mm_unpacklo_epi16(s[2], s[5]);

+  u[1] = _mm_unpackhi_epi16(s[2], s[5]);

+  u[2] = _mm_unpacklo_epi16(s[3], s[4]);

+  u[3] = _mm_unpackhi_epi16(s[3], s[4]);

+  v[0] = _mm_madd_epi16(u[0], k__cospi_m16_p16);

+  v[1] = _mm_madd_epi16(u[1], k__cospi_m16_p16);

+  v[2] = _mm_madd_epi16(u[2], k__cospi_m16_p16);

+  v[3] = _mm_madd_epi16(u[3], k__cospi_m16_p16);

+  v[4] = _mm_madd_epi16(u[2], k__cospi_p16_p16);

+  v[5] = _mm_madd_epi16(u[3], k__cospi_p16_p16);

+  v[6] = _mm_madd_epi16(u[0], k__cospi_p16_p16);

+  v[7] = _mm_madd_epi16(u[1], k__cospi_p16_p16);

+  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

+  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

+  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

+  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

+  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

+  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

+  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

+  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);

+  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

+  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

+  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

+  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

+  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

+  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

+  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

+  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

+  t[2] = _mm_packs_epi32(v[0], v[1]);

+  t[3] = _mm_packs_epi32(v[2], v[3]);

+  t[4] = _mm_packs_epi32(v[4], v[5]);

+  t[5] = _mm_packs_epi32(v[6], v[7]);

+  // stage 3

+  p[0] = _mm_add_epi16(s[0], t[3]);

+  p[1] = _mm_add_epi16(s[1], t[2]);

+  p[2] = _mm_sub_epi16(s[1], t[2]);

+  p[3] = _mm_sub_epi16(s[0], t[3]);

+  p[4] = _mm_sub_epi16(s[7], t[4]);

+  p[5] = _mm_sub_epi16(s[6], t[5]);

+  p[6] = _mm_add_epi16(s[6], t[5]);

+  p[7] = _mm_add_epi16(s[7], t[4]);

+  // stage 4

+  u[0] = _mm_unpacklo_epi16(p[1], p[6]);

+  u[1] = _mm_unpackhi_epi16(p[1], p[6]);

+  u[2] = _mm_unpacklo_epi16(p[2], p[5]);

+  u[3] = _mm_unpackhi_epi16(p[2], p[5]);

+  v[0] = _mm_madd_epi16(u[0], k__cospi_m08_p24);

+  v[1] = _mm_madd_epi16(u[1], k__cospi_m08_p24);

+  v[2] = _mm_madd_epi16(u[2], k__cospi_p24_p08);

+  v[3] = _mm_madd_epi16(u[3], k__cospi_p24_p08);

+  v[4] = _mm_madd_epi16(u[2], k__cospi_p08_m24);

+  v[5] = _mm_madd_epi16(u[3], k__cospi_p08_m24);

+  v[6] = _mm_madd_epi16(u[0], k__cospi_p24_p08);

+  v[7] = _mm_madd_epi16(u[1], k__cospi_p24_p08);

+  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

+  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

+  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

+  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

+  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

+  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

+  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

+  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);

+  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

+  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

+  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

+  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

+  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

+  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

+  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

+  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

+  t[1] = _mm_packs_epi32(v[0], v[1]);

+  t[2] = _mm_packs_epi32(v[2], v[3]);

+  t[5] = _mm_packs_epi32(v[4], v[5]);

+  t[6] = _mm_packs_epi32(v[6], v[7]);

+  // stage 5

+  s[0] = _mm_add_epi16(p[0], t[1]);

+  s[1] = _mm_sub_epi16(p[0], t[1]);

+  s[2] = _mm_add_epi16(p[3], t[2]);

+  s[3] = _mm_sub_epi16(p[3], t[2]);

+  s[4] = _mm_sub_epi16(p[4], t[5]);

+  s[5] = _mm_add_epi16(p[4], t[5]);

+  s[6] = _mm_sub_epi16(p[7], t[6]);

+  s[7] = _mm_add_epi16(p[7], t[6]);

+  // stage 6

+  u[0] = _mm_unpacklo_epi16(s[0], s[7]);

+  u[1] = _mm_unpackhi_epi16(s[0], s[7]);

+  u[2] = _mm_unpacklo_epi16(s[1], s[6]);

+  u[3] = _mm_unpackhi_epi16(s[1], s[6]);

+  u[4] = _mm_unpacklo_epi16(s[2], s[5]);

+  u[5] = _mm_unpackhi_epi16(s[2], s[5]);

+  u[6] = _mm_unpacklo_epi16(s[3], s[4]);

+  u[7] = _mm_unpackhi_epi16(s[3], s[4]);

+  v[0] = _mm_madd_epi16(u[0], k__cospi_p30_p02);

+  v[1] = _mm_madd_epi16(u[1], k__cospi_p30_p02);

+  v[2] = _mm_madd_epi16(u[2], k__cospi_p14_p18);

+  v[3] = _mm_madd_epi16(u[3], k__cospi_p14_p18);

+  v[4] = _mm_madd_epi16(u[4], k__cospi_p22_p10);

+  v[5] = _mm_madd_epi16(u[5], k__cospi_p22_p10);

+  v[6] = _mm_madd_epi16(u[6], k__cospi_p06_p26);

+  v[7] = _mm_madd_epi16(u[7], k__cospi_p06_p26);

+  v[8] = _mm_madd_epi16(u[6], k__cospi_m26_p06);

+  v[9] = _mm_madd_epi16(u[7], k__cospi_m26_p06);

+  v[10] = _mm_madd_epi16(u[4], k__cospi_m10_p22);

+  v[11] = _mm_madd_epi16(u[5], k__cospi_m10_p22);

+  v[12] = _mm_madd_epi16(u[2], k__cospi_m18_p14);

+  v[13] = _mm_madd_epi16(u[3], k__cospi_m18_p14);

+  v[14] = _mm_madd_epi16(u[0], k__cospi_m02_p30);

+  v[15] = _mm_madd_epi16(u[1], k__cospi_m02_p30);

+  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

+  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

+  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

+  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

+  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

+  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

+  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

+  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);

+  u[8] = _mm_add_epi32(v[8], k__DCT_CONST_ROUNDING);

+  u[9] = _mm_add_epi32(v[9], k__DCT_CONST_ROUNDING);

+  u[10] = _mm_add_epi32(v[10], k__DCT_CONST_ROUNDING);

+  u[11] = _mm_add_epi32(v[11], k__DCT_CONST_ROUNDING);

+  u[12] = _mm_add_epi32(v[12], k__DCT_CONST_ROUNDING);

+  u[13] = _mm_add_epi32(v[13], k__DCT_CONST_ROUNDING);

+  u[14] = _mm_add_epi32(v[14], k__DCT_CONST_ROUNDING);

+  u[15] = _mm_add_epi32(v[15], k__DCT_CONST_ROUNDING);

+  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

+  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

+  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

+  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

+  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

+  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

+  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

+  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

+  v[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);

+  v[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);

+  v[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);

+  v[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);

+  v[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);

+  v[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);

+  v[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);

+  v[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);

+  in[1]  = _mm_packs_epi32(v[0], v[1]);

+  in[9]  = _mm_packs_epi32(v[2], v[3]);

+  in[5]  = _mm_packs_epi32(v[4], v[5]);

+  in[13] = _mm_packs_epi32(v[6], v[7]);

+  in[3]  = _mm_packs_epi32(v[8], v[9]);

+  in[11] = _mm_packs_epi32(v[10], v[11]);

+  in[7]  = _mm_packs_epi32(v[12], v[13]);

+  in[15] = _mm_packs_epi32(v[14], v[15]);

+}

+static void fadst16_8col(__m128i *in) {

+  // perform 16x16 1-D ADST for 8 columns

+  __m128i s[16], x[16], u[32], v[32];

+  const __m128i k__cospi_p01_p31 = pair_set_epi16(cospi_1_64, cospi_31_64);

+  const __m128i k__cospi_p31_m01 = pair_set_epi16(cospi_31_64, -cospi_1_64);

+  const __m128i k__cospi_p05_p27 = pair_set_epi16(cospi_5_64, cospi_27_64);

+  const __m128i k__cospi_p27_m05 = pair_set_epi16(cospi_27_64, -cospi_5_64);

+  const __m128i k__cospi_p09_p23 = pair_set_epi16(cospi_9_64, cospi_23_64);

+  const __m128i k__cospi_p23_m09 = pair_set_epi16(cospi_23_64, -cospi_9_64);

+  const __m128i k__cospi_p13_p19 = pair_set_epi16(cospi_13_64, cospi_19_64);

+  const __m128i k__cospi_p19_m13 = pair_set_epi16(cospi_19_64, -cospi_13_64);

+  const __m128i k__cospi_p17_p15 = pair_set_epi16(cospi_17_64, cospi_15_64);

+  const __m128i k__cospi_p15_m17 = pair_set_epi16(cospi_15_64, -cospi_17_64);

+  const __m128i k__cospi_p21_p11 = pair_set_epi16(cospi_21_64, cospi_11_64);

+  const __m128i k__cospi_p11_m21 = pair_set_epi16(cospi_11_64, -cospi_21_64);

+  const __m128i k__cospi_p25_p07 = pair_set_epi16(cospi_25_64, cospi_7_64);

+  const __m128i k__cospi_p07_m25 = pair_set_epi16(cospi_7_64, -cospi_25_64);

+  const __m128i k__cospi_p29_p03 = pair_set_epi16(cospi_29_64, cospi_3_64);

+  const __m128i k__cospi_p03_m29 = pair_set_epi16(cospi_3_64, -cospi_29_64);

+  const __m128i k__cospi_p04_p28 = pair_set_epi16(cospi_4_64, cospi_28_64);

+  const __m128i k__cospi_p28_m04 = pair_set_epi16(cospi_28_64, -cospi_4_64);

+  const __m128i k__cospi_p20_p12 = pair_set_epi16(cospi_20_64, cospi_12_64);

+  const __m128i k__cospi_p12_m20 = pair_set_epi16(cospi_12_64, -cospi_20_64);

+  const __m128i k__cospi_m28_p04 = pair_set_epi16(-cospi_28_64, cospi_4_64);

+  const __m128i k__cospi_m12_p20 = pair_set_epi16(-cospi_12_64, cospi_20_64);

+  const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);

+  const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);

+  const __m128i k__cospi_m24_p08 = pair_set_epi16(-cospi_24_64, cospi_8_64);

+  const __m128i k__cospi_m16_m16 = _mm_set1_epi16((int16_t)-cospi_16_64);

+  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

+  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

+  const __m128i k__cospi_m16_p16 = pair_set_epi16(-cospi_16_64, cospi_16_64);

+  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

+  const __m128i kZero = _mm_set1_epi16(0);

+  u[0] = _mm_unpacklo_epi16(in[15], in[0]);

+  u[1] = _mm_unpackhi_epi16(in[15], in[0]);

+  u[2] = _mm_unpacklo_epi16(in[13], in[2]);

+  u[3] = _mm_unpackhi_epi16(in[13], in[2]);

+  u[4] = _mm_unpacklo_epi16(in[11], in[4]);

+  u[5] = _mm_unpackhi_epi16(in[11], in[4]);

+  u[6] = _mm_unpacklo_epi16(in[9], in[6]);

+  u[7] = _mm_unpackhi_epi16(in[9], in[6]);

+  u[8] = _mm_unpacklo_epi16(in[7], in[8]);

+  u[9] = _mm_unpackhi_epi16(in[7], in[8]);

+  u[10] = _mm_unpacklo_epi16(in[5], in[10]);

+  u[11] = _mm_unpackhi_epi16(in[5], in[10]);

+  u[12] = _mm_unpacklo_epi16(in[3], in[12]);

+  u[13] = _mm_unpackhi_epi16(in[3], in[12]);

+  u[14] = _mm_unpacklo_epi16(in[1], in[14]);

+  u[15] = _mm_unpackhi_epi16(in[1], in[14]);

+  v[0] = _mm_madd_epi16(u[0], k__cospi_p01_p31);

+  v[1] = _mm_madd_epi16(u[1], k__cospi_p01_p31);

+  v[2] = _mm_madd_epi16(u[0], k__cospi_p31_m01);

+  v[3] = _mm_madd_epi16(u[1], k__cospi_p31_m01);

+  v[4] = _mm_madd_epi16(u[2], k__cospi_p05_p27);

+  v[5] = _mm_madd_epi16(u[3], k__cospi_p05_p27);

+  v[6] = _mm_madd_epi16(u[2], k__cospi_p27_m05);

+  v[7] = _mm_madd_epi16(u[3], k__cospi_p27_m05);

+  v[8] = _mm_madd_epi16(u[4], k__cospi_p09_p23);

+  v[9] = _mm_madd_epi16(u[5], k__cospi_p09_p23);

+  v[10] = _mm_madd_epi16(u[4], k__cospi_p23_m09);

+  v[11] = _mm_madd_epi16(u[5], k__cospi_p23_m09);

+  v[12] = _mm_madd_epi16(u[6], k__cospi_p13_p19);

+  v[13] = _mm_madd_epi16(u[7], k__cospi_p13_p19);

+  v[14] = _mm_madd_epi16(u[6], k__cospi_p19_m13);

+  v[15] = _mm_madd_epi16(u[7], k__cospi_p19_m13);

+  v[16] = _mm_madd_epi16(u[8], k__cospi_p17_p15);

+  v[17] = _mm_madd_epi16(u[9], k__cospi_p17_p15);

+  v[18] = _mm_madd_epi16(u[8], k__cospi_p15_m17);

+  v[19] = _mm_madd_epi16(u[9], k__cospi_p15_m17);

+  v[20] = _mm_madd_epi16(u[10], k__cospi_p21_p11);

+  v[21] = _mm_madd_epi16(u[11], k__cospi_p21_p11);

+  v[22] = _mm_madd_epi16(u[10], k__cospi_p11_m21);

+  v[23] = _mm_madd_epi16(u[11], k__cospi_p11_m21);

+  v[24] = _mm_madd_epi16(u[12], k__cospi_p25_p07);

+  v[25] = _mm_madd_epi16(u[13], k__cospi_p25_p07);

+  v[26] = _mm_madd_epi16(u[12], k__cospi_p07_m25);

+  v[27] = _mm_madd_epi16(u[13], k__cospi_p07_m25);

+  v[28] = _mm_madd_epi16(u[14], k__cospi_p29_p03);

+  v[29] = _mm_madd_epi16(u[15], k__cospi_p29_p03);

+  v[30] = _mm_madd_epi16(u[14], k__cospi_p03_m29);

+  v[31] = _mm_madd_epi16(u[15], k__cospi_p03_m29);

+  u[0] = _mm_add_epi32(v[0], v[16]);

+  u[1] = _mm_add_epi32(v[1], v[17]);

+  u[2] = _mm_add_epi32(v[2], v[18]);

+  u[3] = _mm_add_epi32(v[3], v[19]);

+  u[4] = _mm_add_epi32(v[4], v[20]);

+  u[5] = _mm_add_epi32(v[5], v[21]);

+  u[6] = _mm_add_epi32(v[6], v[22]);

+  u[7] = _mm_add_epi32(v[7], v[23]);

+  u[8] = _mm_add_epi32(v[8], v[24]);

+  u[9] = _mm_add_epi32(v[9], v[25]);

+  u[10] = _mm_add_epi32(v[10], v[26]);

+  u[11] = _mm_add_epi32(v[11], v[27]);

+  u[12] = _mm_add_epi32(v[12], v[28]);

+  u[13] = _mm_add_epi32(v[13], v[29]);

+  u[14] = _mm_add_epi32(v[14], v[30]);

+  u[15] = _mm_add_epi32(v[15], v[31]);

+  u[16] = _mm_sub_epi32(v[0], v[16]);

+  u[17] = _mm_sub_epi32(v[1], v[17]);

+  u[18] = _mm_sub_epi32(v[2], v[18]);

+  u[19] = _mm_sub_epi32(v[3], v[19]);

+  u[20] = _mm_sub_epi32(v[4], v[20]);

+  u[21] = _mm_sub_epi32(v[5], v[21]);

+  u[22] = _mm_sub_epi32(v[6], v[22]);

+  u[23] = _mm_sub_epi32(v[7], v[23]);

+  u[24] = _mm_sub_epi32(v[8], v[24]);

+  u[25] = _mm_sub_epi32(v[9], v[25]);

+  u[26] = _mm_sub_epi32(v[10], v[26]);

+  u[27] = _mm_sub_epi32(v[11], v[27]);

+  u[28] = _mm_sub_epi32(v[12], v[28]);

+  u[29] = _mm_sub_epi32(v[13], v[29]);

+  u[30] = _mm_sub_epi32(v[14], v[30]);

+  u[31] = _mm_sub_epi32(v[15], v[31]);

+  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

+  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

+  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

+  v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

+  v[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);

+  v[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);

+  v[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);

+  v[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);

+  v[8] = _mm_add_epi32(u[8], k__DCT_CONST_ROUNDING);

+  v[9] = _mm_add_epi32(u[9], k__DCT_CONST_ROUNDING);

+  v[10] = _mm_add_epi32(u[10], k__DCT_CONST_ROUNDING);

+  v[11] = _mm_add_epi32(u[11], k__DCT_CONST_ROUNDING);

+  v[12] = _mm_add_epi32(u[12], k__DCT_CONST_ROUNDING);

+  v[13] = _mm_add_epi32(u[13], k__DCT_CONST_ROUNDING);

+  v[14] = _mm_add_epi32(u[14], k__DCT_CONST_ROUNDING);

+  v[15] = _mm_add_epi32(u[15], k__DCT_CONST_ROUNDING);

+  v[16] = _mm_add_epi32(u[16], k__DCT_CONST_ROUNDING);

+  v[17] = _mm_add_epi32(u[17], k__DCT_CONST_ROUNDING);

+  v[18] = _mm_add_epi32(u[18], k__DCT_CONST_ROUNDING);

+  v[19] = _mm_add_epi32(u[19], k__DCT_CONST_ROUNDING);

+  v[20] = _mm_add_epi32(u[20], k__DCT_CONST_ROUNDING);

+  v[21] = _mm_add_epi32(u[21], k__DCT_CONST_ROUNDING);

+  v[22] = _mm_add_epi32(u[22], k__DCT_CONST_ROUNDING);

+  v[23] = _mm_add_epi32(u[23], k__DCT_CONST_ROUNDING);

+  v[24] = _mm_add_epi32(u[24], k__DCT_CONST_ROUNDING);

+  v[25] = _mm_add_epi32(u[25], k__DCT_CONST_ROUNDING);

+  v[26] = _mm_add_epi32(u[26], k__DCT_CONST_ROUNDING);

+  v[27] = _mm_add_epi32(u[27], k__DCT_CONST_ROUNDING);

+  v[28] = _mm_add_epi32(u[28], k__DCT_CONST_ROUNDING);

+  v[29] = _mm_add_epi32(u[29], k__DCT_CONST_ROUNDING);

+  v[30] = _mm_add_epi32(u[30], k__DCT_CONST_ROUNDING);

+  v[31] = _mm_add_epi32(u[31], k__DCT_CONST_ROUNDING);

+  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

+  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

+  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

+  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);

+  u[4] = _mm_srai_epi32(v[4], DCT_CONST_BITS);

+  u[5] = _mm_srai_epi32(v[5], DCT_CONST_BITS);

+  u[6] = _mm_srai_epi32(v[6], DCT_CONST_BITS);

+  u[7] = _mm_srai_epi32(v[7], DCT_CONST_BITS);

+  u[8] = _mm_srai_epi32(v[8], DCT_CONST_BITS);

+  u[9] = _mm_srai_epi32(v[9], DCT_CONST_BITS);

+  u[10] = _mm_srai_epi32(v[10], DCT_CONST_BITS);

+  u[11] = _mm_srai_epi32(v[11], DCT_CONST_BITS);

+  u[12] = _mm_srai_epi32(v[12], DCT_CONST_BITS);

+  u[13] = _mm_srai_epi32(v[13], DCT_CONST_BITS);

+  u[14] = _mm_srai_epi32(v[14], DCT_CONST_BITS);

+  u[15] = _mm_srai_epi32(v[15], DCT_CONST_BITS);

+  u[16] = _mm_srai_epi32(v[16], DCT_CONST_BITS);

+  u[17] = _mm_srai_epi32(v[17], DCT_CONST_BITS);

+  u[18] = _mm_srai_epi32(v[18], DCT_CONST_BITS);

+  u[19] = _mm_srai_epi32(v[19], DCT_CONST_BITS);

+  u[20] = _mm_srai_epi32(v[20], DCT_CONST_BITS);

+  u[21] = _mm_srai_epi32(v[21], DCT_CONST_BITS);

+  u[22] = _mm_srai_epi32(v[22], DCT_CONST_BITS);

+  u[23] = _mm_srai_epi32(v[23], DCT_CONST_BITS);

+  u[24] = _mm_srai_epi32(v[24], DCT_CONST_BITS);

+  u[25] = _mm_srai_epi32(v[25], DCT_CONST_BITS);

+  u[26] = _mm_srai_epi32(v[26], DCT_CONST_BITS);

+  u[27] = _mm_srai_epi32(v[27], DCT_CONST_BITS);

+  u[28] = _mm_srai_epi32(v[28], DCT_CONST_BITS);

+  u[29] = _mm_srai_epi32(v[29], DCT_CONST_BITS);

+  u[30] = _mm_srai_epi32(v[30], DCT_CONST_BITS);

+  u[31] = _mm_srai_epi32(v[31], DCT_CONST_BITS);

+  s[0] = _mm_packs_epi32(u[0], u[1]);

+  s[1] = _mm_packs_epi32(u[2], u[3]);

+  s[2] = _mm_packs_epi32(u[4], u[5]);

+  s[3] = _mm_packs_epi32(u[6], u[7]);

+  s[4] = _mm_packs_epi32(u[8], u[9]);

+  s[5] = _mm_packs_epi32(u[10], u[11]);

+  s[6] = _mm_packs_epi32(u[12], u[13]);

+  s[7] = _mm_packs_epi32(u[14], u[15]);

+  s[8] = _mm_packs_epi32(u[16], u[17]);

+  s[9] = _mm_packs_epi32(u[18], u[19]);

+  s[10] = _mm_packs_epi32(u[20], u[21]);

+  s[11] = _mm_packs_epi32(u[22], u[23]);

+  s[12] = _mm_packs_epi32(u[24], u[25]);

+  s[13] = _mm_packs_epi32(u[26], u[27]);

+  s[14] = _mm_packs_epi32(u[28], u[29]);

+  s[15] = _mm_packs_epi32(u[30], u[31]);

+  // stage 2

+  u[0] = _mm_unpacklo_epi16(s[8], s[9]);

+  u[1] = _mm_unpackhi_epi16(s[8], s[9]);

+  u[2] = _mm_unpacklo_epi16(s[10], s[11]);

+  u[3] = _mm_unpackhi_epi16(s[10], s[11]);

+  u[4] = _mm_unpacklo_epi16(s[12], s[13]);

+  u[5] = _mm_unpackhi_epi16(s[12], s[13]);

+  u[6] = _mm_unpacklo_epi16(s[14], s[15]);

+  u[7] = _mm_unpackhi_epi16(s[14], s[15]);

+  v[0] = _mm_madd_epi16(u[0], k__cospi_p04_p28);

+  v[1] = _mm_madd_epi16(u[1], k__cospi_p04_p28);

+  v[2] = _mm_madd_epi16(u[0], k__cospi_p28_m04);

+  v[3] = _mm_madd_epi16(u[1], k__cospi_p28_m04);

+  v[4] = _mm_madd_epi16(u[2], k__cospi_p20_p12);

+  v[5] = _mm_madd_epi16(u[3], k__cospi_p20_p12);

+  v[6] = _mm_madd_epi16(u[2], k__cospi_p12_m20);

+  v[7] = _mm_madd_epi16(u[3], k__cospi_p12_m20);

+  v[8] = _mm_madd_epi16(u[4], k__cospi_m28_p04);

+  v[9] = _mm_madd_epi16(u[5], k__cospi_m28_p04);

+  v[10] = _mm_madd_epi16(u[4], k__cospi_p04_p28);

+  v[11] = _mm_madd_epi16(u[5], k__cospi_p04_p28);

+  v[12] = _mm_madd_epi16(u[6], k__cospi_m12_p20);

+  v[13] = _mm_madd_epi16(u[7], k__cospi_m12_p20);

+  v[14] = _mm_madd_epi16(u[6], k__cospi_p20_p12);

+  v[15] = _mm_madd_epi16(u[7], k__cospi_p20_p12);

+  u[0] = _mm_add_epi32(v[0], v[8]);

+  u[1] = _mm_add_epi32(v[1], v[9]);

+  u[2] = _mm_add_epi32(v[2], v[10]);

+  u[3] = _mm_add_epi32(v[3], v[11]);

+  u[4] = _mm_add_epi32(v[4], v[12]);

+  u[5] = _mm_add_epi32(v[5], v[13]);

+  u[6] = _mm_add_epi32(v[6], v[14]);

+  u[7] = _mm_add_epi32(v[7], v[15]);

+  u[8] = _mm_sub_epi32(v[0], v[8]);

+  u[9] = _mm_sub_epi32(v[1], v[9]);

+  u[10] = _mm_sub_epi32(v[2], v[10]);

+  u[11] = _mm_sub_epi32(v[3], v[11]);

+  u[12] = _mm_sub_epi32(v[4], v[12]);

+  u[13] = _mm_sub_epi32(v[5], v[13]);

+  u[14] = _mm_sub_epi32(v[6], v[14]);

+  u[15] = _mm_sub_epi32(v[7], v[15]);

+  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

+  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

+  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

+  v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

+  v[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);

+  v[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);

+  v[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);

+  v[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);

+  v[8] = _mm_add_epi32(u[8], k__DCT_CONST_ROUNDING);

+  v[9] = _mm_add_epi32(u[9], k__DCT_CONST_ROUNDING);

+  v[10] = _mm_add_epi32(u[10], k__DCT_CONST_ROUNDING);

+  v[11] = _mm_add_epi32(u[11], k__DCT_CONST_ROUNDING);

+  v[12] = _mm_add_epi32(u[12], k__DCT_CONST_ROUNDING);

+  v[13] = _mm_add_epi32(u[13], k__DCT_CONST_ROUNDING);

+  v[14] = _mm_add_epi32(u[14], k__DCT_CONST_ROUNDING);

+  v[15] = _mm_add_epi32(u[15], k__DCT_CONST_ROUNDING);

+  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

+  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

+  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

+  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);

+  u[4] = _mm_srai_epi32(v[4], DCT_CONST_BITS);

+  u[5] = _mm_srai_epi32(v[5], DCT_CONST_BITS);

+  u[6] = _mm_srai_epi32(v[6], DCT_CONST_BITS);

+  u[7] = _mm_srai_epi32(v[7], DCT_CONST_BITS);

+  u[8] = _mm_srai_epi32(v[8], DCT_CONST_BITS);

+  u[9] = _mm_srai_epi32(v[9], DCT_CONST_BITS);

+  u[10] = _mm_srai_epi32(v[10], DCT_CONST_BITS);

+  u[11] = _mm_srai_epi32(v[11], DCT_CONST_BITS);

+  u[12] = _mm_srai_epi32(v[12], DCT_CONST_BITS);

+  u[13] = _mm_srai_epi32(v[13], DCT_CONST_BITS);

+  u[14] = _mm_srai_epi32(v[14], DCT_CONST_BITS);

+  u[15] = _mm_srai_epi32(v[15], DCT_CONST_BITS);

+  x[0] = _mm_add_epi16(s[0], s[4]);

+  x[1] = _mm_add_epi16(s[1], s[5]);

+  x[2] = _mm_add_epi16(s[2], s[6]);

+  x[3] = _mm_add_epi16(s[3], s[7]);

+  x[4] = _mm_sub_epi16(s[0], s[4]);

+  x[5] = _mm_sub_epi16(s[1], s[5]);

+  x[6] = _mm_sub_epi16(s[2], s[6]);

+  x[7] = _mm_sub_epi16(s[3], s[7]);

+  x[8] = _mm_packs_epi32(u[0], u[1]);

+  x[9] = _mm_packs_epi32(u[2], u[3]);

+  x[10] = _mm_packs_epi32(u[4], u[5]);

+  x[11] = _mm_packs_epi32(u[6], u[7]);

+  x[12] = _mm_packs_epi32(u[8], u[9]);

+  x[13] = _mm_packs_epi32(u[10], u[11]);

+  x[14] = _mm_packs_epi32(u[12], u[13]);

+  x[15] = _mm_packs_epi32(u[14], u[15]);

+  // stage 3

+  u[0] = _mm_unpacklo_epi16(x[4], x[5]);

+  u[1] = _mm_unpackhi_epi16(x[4], x[5]);

+  u[2] = _mm_unpacklo_epi16(x[6], x[7]);

+  u[3] = _mm_unpackhi_epi16(x[6], x[7]);

+  u[4] = _mm_unpacklo_epi16(x[12], x[13]);

+  u[5] = _mm_unpackhi_epi16(x[12], x[13]);

+  u[6] = _mm_unpacklo_epi16(x[14], x[15]);

+  u[7] = _mm_unpackhi_epi16(x[14], x[15]);

+  v[0] = _mm_madd_epi16(u[0], k__cospi_p08_p24);

+  v[1] = _mm_madd_epi16(u[1], k__cospi_p08_p24);

+  v[2] = _mm_madd_epi16(u[0], k__cospi_p24_m08);

+  v[3] = _mm_madd_epi16(u[1], k__cospi_p24_m08);

+  v[4] = _mm_madd_epi16(u[2], k__cospi_m24_p08);

+  v[5] = _mm_madd_epi16(u[3], k__cospi_m24_p08);

+  v[6] = _mm_madd_epi16(u[2], k__cospi_p08_p24);

+  v[7] = _mm_madd_epi16(u[3], k__cospi_p08_p24);

+  v[8] = _mm_madd_epi16(u[4], k__cospi_p08_p24);

+  v[9] = _mm_madd_epi16(u[5], k__cospi_p08_p24);

+  v[10] = _mm_madd_epi16(u[4], k__cospi_p24_m08);

+  v[11] = _mm_madd_epi16(u[5], k__cospi_p24_m08);

+  v[12] = _mm_madd_epi16(u[6], k__cospi_m24_p08);

+  v[13] = _mm_madd_epi16(u[7], k__cospi_m24_p08);

+  v[14] = _mm_madd_epi16(u[6], k__cospi_p08_p24);

+  v[15] = _mm_madd_epi16(u[7], k__cospi_p08_p24);

+  u[0] = _mm_add_epi32(v[0], v[4]);

+  u[1] = _mm_add_epi32(v[1], v[5]);

+  u[2] = _mm_add_epi32(v[2], v[6]);

+  u[3] = _mm_add_epi32(v[3], v[7]);

+  u[4] = _mm_sub_epi32(v[0], v[4]);

+  u[5] = _mm_sub_epi32(v[1], v[5]);

+  u[6] = _mm_sub_epi32(v[2], v[6]);

+  u[7] = _mm_sub_epi32(v[3], v[7]);

+  u[8] = _mm_add_epi32(v[8], v[12]);

+  u[9] = _mm_add_epi32(v[9], v[13]);

+  u[10] = _mm_add_epi32(v[10], v[14]);

+  u[11] = _mm_add_epi32(v[11], v[15]);

+  u[12] = _mm_sub_epi32(v[8], v[12]);

+  u[13] = _mm_sub_epi32(v[9], v[13]);

+  u[14] = _mm_sub_epi32(v[10], v[14]);

+  u[15] = _mm_sub_epi32(v[11], v[15]);

+  u[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

+  u[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

+  u[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

+  u[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

+  u[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);

+  u[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);

+  u[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);

+  u[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);

+  u[8] = _mm_add_epi32(u[8], k__DCT_CONST_ROUNDING);

+  u[9] = _mm_add_epi32(u[9], k__DCT_CONST_ROUNDING);

+  u[10] = _mm_add_epi32(u[10], k__DCT_CONST_ROUNDING);

+  u[11] = _mm_add_epi32(u[11], k__DCT_CONST_ROUNDING);

+  u[12] = _mm_add_epi32(u[12], k__DCT_CONST_ROUNDING);

+  u[13] = _mm_add_epi32(u[13], k__DCT_CONST_ROUNDING);

+  u[14] = _mm_add_epi32(u[14], k__DCT_CONST_ROUNDING);

+  u[15] = _mm_add_epi32(u[15], k__DCT_CONST_ROUNDING);

+  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

+  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

+  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

+  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

+  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

+  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

+  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

+  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

+  v[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);

+  v[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);

+  v[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);

+  v[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);

+  v[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);

+  v[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);

+  v[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);

+  v[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);

+  s[0] = _mm_add_epi16(x[0], x[2]);

+  s[1] = _mm_add_epi16(x[1], x[3]);

+  s[2] = _mm_sub_epi16(x[0], x[2]);

+  s[3] = _mm_sub_epi16(x[1], x[3]);

+  s[4] = _mm_packs_epi32(v[0], v[1]);

+  s[5] = _mm_packs_epi32(v[2], v[3]);

+  s[6] = _mm_packs_epi32(v[4], v[5]);

+  s[7] = _mm_packs_epi32(v[6], v[7]);

+  s[8] = _mm_add_epi16(x[8], x[10]);

+  s[9] = _mm_add_epi16(x[9], x[11]);

+  s[10] = _mm_sub_epi16(x[8], x[10]);

+  s[11] = _mm_sub_epi16(x[9], x[11]);

+  s[12] = _mm_packs_epi32(v[8], v[9]);

+  s[13] = _mm_packs_epi32(v[10], v[11]);

+  s[14] = _mm_packs_epi32(v[12], v[13]);

+  s[15] = _mm_packs_epi32(v[14], v[15]);

+  // stage 4

+  u[0] = _mm_unpacklo_epi16(s[2], s[3]);

+  u[1] = _mm_unpackhi_epi16(s[2], s[3]);

+  u[2] = _mm_unpacklo_epi16(s[6], s[7]);

+  u[3] = _mm_unpackhi_epi16(s[6], s[7]);

+  u[4] = _mm_unpacklo_epi16(s[10], s[11]);

+  u[5] = _mm_unpackhi_epi16(s[10], s[11]);

+  u[6] = _mm_unpacklo_epi16(s[14], s[15]);

+  u[7] = _mm_unpackhi_epi16(s[14], s[15]);

+  v[0] = _mm_madd_epi16(u[0], k__cospi_m16_m16);

+  v[1] = _mm_madd_epi16(u[1], k__cospi_m16_m16);

+  v[2] = _mm_madd_epi16(u[0], k__cospi_p16_m16);

+  v[3] = _mm_madd_epi16(u[1], k__cospi_p16_m16);

+  v[4] = _mm_madd_epi16(u[2], k__cospi_p16_p16);

+  v[5] = _mm_madd_epi16(u[3], k__cospi_p16_p16);

+  v[6] = _mm_madd_epi16(u[2], k__cospi_m16_p16);

+  v[7] = _mm_madd_epi16(u[3], k__cospi_m16_p16);

+  v[8] = _mm_madd_epi16(u[4], k__cospi_p16_p16);

+  v[9] = _mm_madd_epi16(u[5], k__cospi_p16_p16);

+  v[10] = _mm_madd_epi16(u[4], k__cospi_m16_p16);

+  v[11] = _mm_madd_epi16(u[5], k__cospi_m16_p16);

+  v[12] = _mm_madd_epi16(u[6], k__cospi_m16_m16);

+  v[13] = _mm_madd_epi16(u[7], k__cospi_m16_m16);

+  v[14] = _mm_madd_epi16(u[6], k__cospi_p16_m16);

+  v[15] = _mm_madd_epi16(u[7], k__cospi_p16_m16);

+  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

+  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

+  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

+  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

+  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

+  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

+  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

+  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);

+  u[8] = _mm_add_epi32(v[8], k__DCT_CONST_ROUNDING);

+  u[9] = _mm_add_epi32(v[9], k__DCT_CONST_ROUNDING);

+  u[10] = _mm_add_epi32(v[10], k__DCT_CONST_ROUNDING);

+  u[11] = _mm_add_epi32(v[11], k__DCT_CONST_ROUNDING);

+  u[12] = _mm_add_epi32(v[12], k__DCT_CONST_ROUNDING);

+  u[13] = _mm_add_epi32(v[13], k__DCT_CONST_ROUNDING);

+  u[14] = _mm_add_epi32(v[14], k__DCT_CONST_ROUNDING);

+  u[15] = _mm_add_epi32(v[15], k__DCT_CONST_ROUNDING);

+  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

+  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

+  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

+  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

+  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

+  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

+  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

+  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

+  v[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);

+  v[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);

+  v[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);

+  v[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);

+  v[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);

+  v[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);

+  v[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);

+  v[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);

+  in[0] = s[0];

+  in[1] = _mm_sub_epi16(kZero, s[8]);

+  in[2] = s[12];

+  in[3] = _mm_sub_epi16(kZero, s[4]);

+  in[4] = _mm_packs_epi32(v[4], v[5]);

+  in[5] = _mm_packs_epi32(v[12], v[13]);

+  in[6] = _mm_packs_epi32(v[8], v[9]);

+  in[7] = _mm_packs_epi32(v[0], v[1]);

+  in[8] = _mm_packs_epi32(v[2], v[3]);

+  in[9] = _mm_packs_epi32(v[10], v[11]);

+  in[10] = _mm_packs_epi32(v[14], v[15]);

+  in[11] = _mm_packs_epi32(v[6], v[7]);

+  in[12] = s[5];

+  in[13] = _mm_sub_epi16(kZero, s[13]);

+  in[14] = s[9];

+  in[15] = _mm_sub_epi16(kZero, s[1]);

+}

+static void fdct16_sse2(__m128i *in0, __m128i *in1) {

+  fdct16_8col(in0);

+  fdct16_8col(in1);

+  array_transpose_16x16(in0, in1);

+}

+static void fadst16_sse2(__m128i *in0, __m128i *in1) {

+  fadst16_8col(in0);

+  fadst16_8col(in1);

+  array_transpose_16x16(in0, in1);

+}

+void vp9_fht16x16_sse2(const int16_t *input, tran_low_t *output,

+                       int stride, int tx_type) {

+  __m128i in0[16], in1[16];

+  switch (tx_type) {

+    case DCT_DCT:

+      vpx_fdct16x16_sse2(input, output, stride);

+      break;

+    case ADST_DCT:

+      load_buffer_16x16(input, in0, in1, stride);

+      fadst16_sse2(in0, in1);

+      right_shift_16x16(in0, in1);

+      fdct16_sse2(in0, in1);

+      write_buffer_16x16(output, in0, in1, 16);

+      break;

+    case DCT_ADST:

+      load_buffer_16x16(input, in0, in1, stride);

+      fdct16_sse2(in0, in1);

+      right_shift_16x16(in0, in1);

+      fadst16_sse2(in0, in1);

+      write_buffer_16x16(output, in0, in1, 16);

+      break;

+    case ADST_ADST:

+      load_buffer_16x16(input, in0, in1, stride);

+      fadst16_sse2(in0, in1);

+      right_shift_16x16(in0, in1);

+      fadst16_sse2(in0, in1);

+      write_buffer_16x16(output, in0, in1, 16);

+      break;

+    default:

+      assert(0);

+      break;

+  }

+}

--- a/vp9/encoder/x86/vp9_dct_mmx.asm

+++ /dev/null

@@ -1,104 +1,0 @@

-;

-;  Copyright (c) 2014 The WebM project authors. All Rights Reserved.

-;

-;  Use of this source code is governed by a BSD-style license

-;  that can be found in the LICENSE file in the root of the source

-;  tree. An additional intellectual property rights grant can be found

-;  in the file PATENTS.  All contributing project authors may

-;  be found in the AUTHORS file in the root of the source tree.

-;

-%define private_prefix vp9

-%include "third_party/x86inc/x86inc.asm"

-SECTION .text

-%macro TRANSFORM_COLS 0

-  paddw           m0,        m1

-  movq            m4,        m0

-  psubw           m3,        m2

-  psubw           m4,        m3

-  psraw           m4,        1

-  movq            m5,        m4

-  psubw           m5,        m1 ;b1

-  psubw           m4,        m2 ;c1

-  psubw           m0,        m4

-  paddw           m3,        m5

-                                ; m0 a0

-  SWAP            1,         4  ; m1 c1

-  SWAP            2,         3  ; m2 d1

-  SWAP            3,         5  ; m3 b1

-%endmacro

-%macro TRANSPOSE_4X4 0

-  movq            m4,        m0

-  movq            m5,        m2

-  punpcklwd       m4,        m1

-  punpckhwd       m0,        m1

-  punpcklwd       m5,        m3

-  punpckhwd       m2,        m3

-  movq            m1,        m4

-  movq            m3,        m0

-  punpckldq       m1,        m5

-  punpckhdq       m4,        m5

-  punpckldq       m3,        m2

-  punpckhdq       m0,        m2

-  SWAP            2, 3, 0, 1, 4

-%endmacro

-INIT_MMX mmx

-cglobal fwht4x4, 3, 4, 8, input, output, stride

-  lea             r3q,       [inputq + strideq*4]

-  movq            m0,        [inputq] ;a1

-  movq            m1,        [inputq + strideq*2] ;b1

-  movq            m2,        [r3q] ;c1

-  movq            m3,        [r3q + strideq*2] ;d1

-  TRANSFORM_COLS

-  TRANSPOSE_4X4

-  TRANSFORM_COLS

-  TRANSPOSE_4X4

-  psllw           m0,        2

-  psllw           m1,        2

-  psllw           m2,        2

-  psllw           m3,        2

-%if CONFIG_VP9_HIGHBITDEPTH

-  pxor            m4,             m4

-  pxor            m5,             m5

-  pcmpgtw         m4,             m0

-  pcmpgtw         m5,             m1

-  movq            m6,             m0

-  movq            m7,             m1

-  punpcklwd       m0,             m4

-  punpcklwd       m1,             m5

-  punpckhwd       m6,             m4

-  punpckhwd       m7,             m5

-  movq            [outputq],      m0

-  movq            [outputq + 8],  m6

-  movq            [outputq + 16], m1

-  movq            [outputq + 24], m7

-  pxor            m4,             m4

-  pxor            m5,             m5

-  pcmpgtw         m4,             m2

-  pcmpgtw         m5,             m3

-  movq            m6,             m2

-  movq            m7,             m3

-  punpcklwd       m2,             m4

-  punpcklwd       m3,             m5

-  punpckhwd       m6,             m4

-  punpckhwd       m7,             m5

-  movq            [outputq + 32], m2

-  movq            [outputq + 40], m6

-  movq            [outputq + 48], m3

-  movq            [outputq + 56], m7

-%else

-  movq            [outputq],      m0

-  movq            [outputq + 8],  m1

-  movq            [outputq + 16], m2

-  movq            [outputq + 24], m3

-%endif

-  RET

--- /dev/null

+++ b/vp9/encoder/x86/vp9_dct_sse2.asm

@@ -1,0 +1,87 @@

+;

+;  Copyright (c) 2016 The WebM project authors. All Rights Reserved.

+;

+;  Use of this source code is governed by a BSD-style license

+;  that can be found in the LICENSE file in the root of the source

+;  tree. An additional intellectual property rights grant can be found

+;  in the file PATENTS.  All contributing project authors may

+;  be found in the AUTHORS file in the root of the source tree.

+;

+%define private_prefix vp9

+%include "third_party/x86inc/x86inc.asm"

+SECTION .text

+%macro TRANSFORM_COLS 0

+  paddw           m0,        m1

+  movq            m4,        m0

+  psubw           m3,        m2

+  psubw           m4,        m3

+  psraw           m4,        1

+  movq            m5,        m4

+  psubw           m5,        m1 ;b1

+  psubw           m4,        m2 ;c1

+  psubw           m0,        m4

+  paddw           m3,        m5

+                                ; m0 a0

+  SWAP            1,         4  ; m1 c1

+  SWAP            2,         3  ; m2 d1

+  SWAP            3,         5  ; m3 b1

+%endmacro

+%macro TRANSPOSE_4X4 0

+                                ; 00 01 02 03

+                                ; 10 11 12 13

+                                ; 20 21 22 23

+                                ; 30 31 32 33

+  punpcklwd       m0,        m1 ; 00 10 01 11  02 12 03 13

+  punpcklwd       m2,        m3 ; 20 30 21 31  22 32 23 33

+  mova            m1,        m0

+  punpckldq       m0,        m2 ; 00 10 20 30  01 11 21 31

+  punpckhdq       m1,        m2 ; 02 12 22 32  03 13 23 33

+%endmacro

+INIT_XMM sse2

+cglobal fwht4x4, 3, 4, 8, input, output, stride

+; TODO(linfeng): The duplication with vp10 should be resolved.

+  lea             r3q,       [inputq + strideq*4]

+  movq            m0,        [inputq] ;a1

+  movq            m1,        [inputq + strideq*2] ;b1

+  movq            m2,        [r3q] ;c1

+  movq            m3,        [r3q + strideq*2] ;d1

+  TRANSFORM_COLS

+  TRANSPOSE_4X4

+  SWAP            1,         2

+  psrldq          m1,        m0, 8

+  psrldq          m3,        m2, 8

+  TRANSFORM_COLS

+  TRANSPOSE_4X4

+  psllw           m0,        2

+  psllw           m1,        2

+%if CONFIG_VP9_HIGHBITDEPTH

+  ; sign extension

+  mova            m2,             m0

+  mova            m3,             m1

+  punpcklwd       m0,             m0

+  punpcklwd       m1,             m1

+  punpckhwd       m2,             m2

+  punpckhwd       m3,             m3

+  psrad           m0,             16

+  psrad           m1,             16

+  psrad           m2,             16

+  psrad           m3,             16

+  mova            [outputq],      m0

+  mova            [outputq + 16], m2

+  mova            [outputq + 32], m1

+  mova            [outputq + 48], m3

+%else

+  mova            [outputq],      m0

+  mova            [outputq + 16], m1

+%endif

+  RET

--- a/vp9/encoder/x86/vp9_dct_sse2.c

+++ /dev/null

@@ -1,2058 +1,0 @@

-/*

- *  Copyright (c) 2012 The WebM project authors. All Rights Reserved.

- *

- *  Use of this source code is governed by a BSD-style license

- *  that can be found in the LICENSE file in the root of the source

- *  tree. An additional intellectual property rights grant can be found

- *  in the file PATENTS.  All contributing project authors may

- *  be found in the AUTHORS file in the root of the source tree.

- */

-#include <assert.h>

-#include <emmintrin.h>  // SSE2

-#include "./vp9_rtcd.h"

-#include "./vpx_dsp_rtcd.h"

-#include "vpx_dsp/txfm_common.h"

-#include "vpx_dsp/x86/fwd_txfm_sse2.h"

-#include "vpx_dsp/x86/txfm_common_sse2.h"

-#include "vpx_ports/mem.h"

-static INLINE void load_buffer_4x4(const int16_t *input, __m128i *in,

-                                   int stride) {

-  const __m128i k__nonzero_bias_a = _mm_setr_epi16(0, 1, 1, 1, 1, 1, 1, 1);

-  const __m128i k__nonzero_bias_b = _mm_setr_epi16(1, 0, 0, 0, 0, 0, 0, 0);

-  __m128i mask;

-  in[0] = _mm_loadl_epi64((const __m128i *)(input + 0 * stride));

-  in[1] = _mm_loadl_epi64((const __m128i *)(input + 1 * stride));

-  in[2] = _mm_loadl_epi64((const __m128i *)(input + 2 * stride));

-  in[3] = _mm_loadl_epi64((const __m128i *)(input + 3 * stride));

-  in[0] = _mm_slli_epi16(in[0], 4);

-  in[1] = _mm_slli_epi16(in[1], 4);

-  in[2] = _mm_slli_epi16(in[2], 4);

-  in[3] = _mm_slli_epi16(in[3], 4);

-  mask = _mm_cmpeq_epi16(in[0], k__nonzero_bias_a);

-  in[0] = _mm_add_epi16(in[0], mask);

-  in[0] = _mm_add_epi16(in[0], k__nonzero_bias_b);

-}

-static INLINE void write_buffer_4x4(tran_low_t *output, __m128i *res) {

-  const __m128i kOne = _mm_set1_epi16(1);

-  __m128i in01 = _mm_unpacklo_epi64(res[0], res[1]);

-  __m128i in23 = _mm_unpacklo_epi64(res[2], res[3]);

-  __m128i out01 = _mm_add_epi16(in01, kOne);

-  __m128i out23 = _mm_add_epi16(in23, kOne);

-  out01 = _mm_srai_epi16(out01, 2);

-  out23 = _mm_srai_epi16(out23, 2);

-  store_output(&out01, (output + 0 * 8));

-  store_output(&out23, (output + 1 * 8));

-}

-static INLINE void transpose_4x4(__m128i *res) {

-  // Combine and transpose

-  // 00 01 02 03 20 21 22 23

-  // 10 11 12 13 30 31 32 33

-  const __m128i tr0_0 = _mm_unpacklo_epi16(res[0], res[1]);

-  const __m128i tr0_1 = _mm_unpackhi_epi16(res[0], res[1]);

-  // 00 10 01 11 02 12 03 13

-  // 20 30 21 31 22 32 23 33

-  res[0] = _mm_unpacklo_epi32(tr0_0, tr0_1);

-  res[2] = _mm_unpackhi_epi32(tr0_0, tr0_1);

-  // 00 10 20 30 01 11 21 31

-  // 02 12 22 32 03 13 23 33

-  // only use the first 4 16-bit integers

-  res[1] = _mm_unpackhi_epi64(res[0], res[0]);

-  res[3] = _mm_unpackhi_epi64(res[2], res[2]);

-}

-static void fdct4_sse2(__m128i *in) {

-  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

-  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

-  const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);

-  const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);

-  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

-  __m128i u[4], v[4];

-  u[0]=_mm_unpacklo_epi16(in[0], in[1]);

-  u[1]=_mm_unpacklo_epi16(in[3], in[2]);

-  v[0] = _mm_add_epi16(u[0], u[1]);

-  v[1] = _mm_sub_epi16(u[0], u[1]);

-  u[0] = _mm_madd_epi16(v[0], k__cospi_p16_p16);  // 0

-  u[1] = _mm_madd_epi16(v[0], k__cospi_p16_m16);  // 2

-  u[2] = _mm_madd_epi16(v[1], k__cospi_p08_p24);  // 1

-  u[3] = _mm_madd_epi16(v[1], k__cospi_p24_m08);  // 3

-  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

-  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

-  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

-  v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

-  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

-  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

-  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

-  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);

-  in[0] = _mm_packs_epi32(u[0], u[1]);

-  in[1] = _mm_packs_epi32(u[2], u[3]);

-  transpose_4x4(in);

-}

-static void fadst4_sse2(__m128i *in) {

-  const __m128i k__sinpi_p01_p02 = pair_set_epi16(sinpi_1_9, sinpi_2_9);

-  const __m128i k__sinpi_p04_m01 = pair_set_epi16(sinpi_4_9, -sinpi_1_9);

-  const __m128i k__sinpi_p03_p04 = pair_set_epi16(sinpi_3_9, sinpi_4_9);

-  const __m128i k__sinpi_m03_p02 = pair_set_epi16(-sinpi_3_9, sinpi_2_9);

-  const __m128i k__sinpi_p03_p03 = _mm_set1_epi16((int16_t)sinpi_3_9);

-  const __m128i kZero = _mm_set1_epi16(0);

-  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

-  __m128i u[8], v[8];

-  __m128i in7 = _mm_add_epi16(in[0], in[1]);

-  u[0] = _mm_unpacklo_epi16(in[0], in[1]);

-  u[1] = _mm_unpacklo_epi16(in[2], in[3]);

-  u[2] = _mm_unpacklo_epi16(in7, kZero);

-  u[3] = _mm_unpacklo_epi16(in[2], kZero);

-  u[4] = _mm_unpacklo_epi16(in[3], kZero);

-  v[0] = _mm_madd_epi16(u[0], k__sinpi_p01_p02);  // s0 + s2

-  v[1] = _mm_madd_epi16(u[1], k__sinpi_p03_p04);  // s4 + s5

-  v[2] = _mm_madd_epi16(u[2], k__sinpi_p03_p03);  // x1

-  v[3] = _mm_madd_epi16(u[0], k__sinpi_p04_m01);  // s1 - s3

-  v[4] = _mm_madd_epi16(u[1], k__sinpi_m03_p02);  // -s4 + s6

-  v[5] = _mm_madd_epi16(u[3], k__sinpi_p03_p03);  // s4

-  v[6] = _mm_madd_epi16(u[4], k__sinpi_p03_p03);

-  u[0] = _mm_add_epi32(v[0], v[1]);

-  u[1] = _mm_sub_epi32(v[2], v[6]);

-  u[2] = _mm_add_epi32(v[3], v[4]);

-  u[3] = _mm_sub_epi32(u[2], u[0]);

-  u[4] = _mm_slli_epi32(v[5], 2);

-  u[5] = _mm_sub_epi32(u[4], v[5]);

-  u[6] = _mm_add_epi32(u[3], u[5]);

-  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

-  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

-  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

-  v[3] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);

-  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

-  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

-  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

-  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);

-  in[0] = _mm_packs_epi32(u[0], u[2]);

-  in[1] = _mm_packs_epi32(u[1], u[3]);

-  transpose_4x4(in);

-}

-void vp9_fht4x4_sse2(const int16_t *input, tran_low_t *output,

-                     int stride, int tx_type) {

-  __m128i in[4];

-  switch (tx_type) {

-    case DCT_DCT:

-      vpx_fdct4x4_sse2(input, output, stride);

-      break;

-    case ADST_DCT:

-      load_buffer_4x4(input, in, stride);

-      fadst4_sse2(in);

-      fdct4_sse2(in);

-      write_buffer_4x4(output, in);

-      break;

-    case DCT_ADST:

-      load_buffer_4x4(input, in, stride);

-      fdct4_sse2(in);

-      fadst4_sse2(in);

-      write_buffer_4x4(output, in);

-      break;

-    case ADST_ADST:

-      load_buffer_4x4(input, in, stride);

-      fadst4_sse2(in);

-      fadst4_sse2(in);

-      write_buffer_4x4(output, in);

-      break;

-   default:

-     assert(0);

-     break;

-  }

-}

-void vp9_fdct8x8_quant_sse2(const int16_t *input, int stride,

-                            int16_t* coeff_ptr, intptr_t n_coeffs,

-                            int skip_block, const int16_t* zbin_ptr,

-                            const int16_t* round_ptr, const int16_t* quant_ptr,

-                            const int16_t* quant_shift_ptr, int16_t* qcoeff_ptr,

-                            int16_t* dqcoeff_ptr, const int16_t* dequant_ptr,

-                            uint16_t* eob_ptr,

-                            const int16_t* scan_ptr,

-                            const int16_t* iscan_ptr) {

-  __m128i zero;

-  int pass;

-  // Constants

-  //    When we use them, in one case, they are all the same. In all others

-  //    it's a pair of them that we need to repeat four times. This is done

-  //    by constructing the 32 bit constant corresponding to that pair.

-  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

-  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

-  const __m128i k__cospi_p24_p08 = pair_set_epi16(cospi_24_64, cospi_8_64);

-  const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64, cospi_24_64);

-  const __m128i k__cospi_p28_p04 = pair_set_epi16(cospi_28_64, cospi_4_64);

-  const __m128i k__cospi_m04_p28 = pair_set_epi16(-cospi_4_64, cospi_28_64);

-  const __m128i k__cospi_p12_p20 = pair_set_epi16(cospi_12_64, cospi_20_64);

-  const __m128i k__cospi_m20_p12 = pair_set_epi16(-cospi_20_64, cospi_12_64);

-  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

-  // Load input

-  __m128i in0  = _mm_load_si128((const __m128i *)(input + 0 * stride));

-  __m128i in1  = _mm_load_si128((const __m128i *)(input + 1 * stride));

-  __m128i in2  = _mm_load_si128((const __m128i *)(input + 2 * stride));

-  __m128i in3  = _mm_load_si128((const __m128i *)(input + 3 * stride));

-  __m128i in4  = _mm_load_si128((const __m128i *)(input + 4 * stride));

-  __m128i in5  = _mm_load_si128((const __m128i *)(input + 5 * stride));

-  __m128i in6  = _mm_load_si128((const __m128i *)(input + 6 * stride));

-  __m128i in7  = _mm_load_si128((const __m128i *)(input + 7 * stride));

-  __m128i *in[8];

-  int index = 0;

-  (void)scan_ptr;

-  (void)zbin_ptr;

-  (void)quant_shift_ptr;

-  (void)coeff_ptr;

-  // Pre-condition input (shift by two)

-  in0 = _mm_slli_epi16(in0, 2);

-  in1 = _mm_slli_epi16(in1, 2);

-  in2 = _mm_slli_epi16(in2, 2);

-  in3 = _mm_slli_epi16(in3, 2);

-  in4 = _mm_slli_epi16(in4, 2);

-  in5 = _mm_slli_epi16(in5, 2);

-  in6 = _mm_slli_epi16(in6, 2);

-  in7 = _mm_slli_epi16(in7, 2);

-  in[0] = &in0;

-  in[1] = &in1;

-  in[2] = &in2;

-  in[3] = &in3;

-  in[4] = &in4;

-  in[5] = &in5;

-  in[6] = &in6;

-  in[7] = &in7;

-  // We do two passes, first the columns, then the rows. The results of the

-  // first pass are transposed so that the same column code can be reused. The

-  // results of the second pass are also transposed so that the rows (processed

-  // as columns) are put back in row positions.

-  for (pass = 0; pass < 2; pass++) {

-    // To store results of each pass before the transpose.

-    __m128i res0, res1, res2, res3, res4, res5, res6, res7;

-    // Add/subtract

-    const __m128i q0 = _mm_add_epi16(in0, in7);

-    const __m128i q1 = _mm_add_epi16(in1, in6);

-    const __m128i q2 = _mm_add_epi16(in2, in5);

-    const __m128i q3 = _mm_add_epi16(in3, in4);

-    const __m128i q4 = _mm_sub_epi16(in3, in4);

-    const __m128i q5 = _mm_sub_epi16(in2, in5);

-    const __m128i q6 = _mm_sub_epi16(in1, in6);

-    const __m128i q7 = _mm_sub_epi16(in0, in7);

-    // Work on first four results

-    {

-      // Add/subtract

-      const __m128i r0 = _mm_add_epi16(q0, q3);

-      const __m128i r1 = _mm_add_epi16(q1, q2);

-      const __m128i r2 = _mm_sub_epi16(q1, q2);

-      const __m128i r3 = _mm_sub_epi16(q0, q3);

-      // Interleave to do the multiply by constants which gets us into 32bits

-      const __m128i t0 = _mm_unpacklo_epi16(r0, r1);

-      const __m128i t1 = _mm_unpackhi_epi16(r0, r1);

-      const __m128i t2 = _mm_unpacklo_epi16(r2, r3);

-      const __m128i t3 = _mm_unpackhi_epi16(r2, r3);

-      const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p16_p16);

-      const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p16_p16);

-      const __m128i u2 = _mm_madd_epi16(t0, k__cospi_p16_m16);

-      const __m128i u3 = _mm_madd_epi16(t1, k__cospi_p16_m16);

-      const __m128i u4 = _mm_madd_epi16(t2, k__cospi_p24_p08);

-      const __m128i u5 = _mm_madd_epi16(t3, k__cospi_p24_p08);

-      const __m128i u6 = _mm_madd_epi16(t2, k__cospi_m08_p24);

-      const __m128i u7 = _mm_madd_epi16(t3, k__cospi_m08_p24);

-      // dct_const_round_shift

-      const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);

-      const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);

-      const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);

-      const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);

-      const __m128i v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);

-      const __m128i v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING);

-      const __m128i v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);

-      const __m128i v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING);

-      const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

-      const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

-      const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

-      const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

-      const __m128i w4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

-      const __m128i w5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

-      const __m128i w6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

-      const __m128i w7 = _mm_srai_epi32(v7, DCT_CONST_BITS);

-      // Combine

-      res0 = _mm_packs_epi32(w0, w1);

-      res4 = _mm_packs_epi32(w2, w3);

-      res2 = _mm_packs_epi32(w4, w5);

-      res6 = _mm_packs_epi32(w6, w7);

-    }

-    // Work on next four results

-    {

-      // Interleave to do the multiply by constants which gets us into 32bits

-      const __m128i d0 = _mm_unpacklo_epi16(q6, q5);

-      const __m128i d1 = _mm_unpackhi_epi16(q6, q5);

-      const __m128i e0 = _mm_madd_epi16(d0, k__cospi_p16_m16);

-      const __m128i e1 = _mm_madd_epi16(d1, k__cospi_p16_m16);

-      const __m128i e2 = _mm_madd_epi16(d0, k__cospi_p16_p16);

-      const __m128i e3 = _mm_madd_epi16(d1, k__cospi_p16_p16);

-      // dct_const_round_shift

-      const __m128i f0 = _mm_add_epi32(e0, k__DCT_CONST_ROUNDING);

-      const __m128i f1 = _mm_add_epi32(e1, k__DCT_CONST_ROUNDING);

-      const __m128i f2 = _mm_add_epi32(e2, k__DCT_CONST_ROUNDING);

-      const __m128i f3 = _mm_add_epi32(e3, k__DCT_CONST_ROUNDING);

-      const __m128i s0 = _mm_srai_epi32(f0, DCT_CONST_BITS);

-      const __m128i s1 = _mm_srai_epi32(f1, DCT_CONST_BITS);

-      const __m128i s2 = _mm_srai_epi32(f2, DCT_CONST_BITS);

-      const __m128i s3 = _mm_srai_epi32(f3, DCT_CONST_BITS);

-      // Combine

-      const __m128i r0 = _mm_packs_epi32(s0, s1);

-      const __m128i r1 = _mm_packs_epi32(s2, s3);

-      // Add/subtract

-      const __m128i x0 = _mm_add_epi16(q4, r0);

-      const __m128i x1 = _mm_sub_epi16(q4, r0);

-      const __m128i x2 = _mm_sub_epi16(q7, r1);

-      const __m128i x3 = _mm_add_epi16(q7, r1);

-      // Interleave to do the multiply by constants which gets us into 32bits

-      const __m128i t0 = _mm_unpacklo_epi16(x0, x3);

-      const __m128i t1 = _mm_unpackhi_epi16(x0, x3);

-      const __m128i t2 = _mm_unpacklo_epi16(x1, x2);

-      const __m128i t3 = _mm_unpackhi_epi16(x1, x2);

-      const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p28_p04);

-      const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p28_p04);

-      const __m128i u2 = _mm_madd_epi16(t0, k__cospi_m04_p28);

-      const __m128i u3 = _mm_madd_epi16(t1, k__cospi_m04_p28);

-      const __m128i u4 = _mm_madd_epi16(t2, k__cospi_p12_p20);

-      const __m128i u5 = _mm_madd_epi16(t3, k__cospi_p12_p20);

-      const __m128i u6 = _mm_madd_epi16(t2, k__cospi_m20_p12);

-      const __m128i u7 = _mm_madd_epi16(t3, k__cospi_m20_p12);

-      // dct_const_round_shift

-      const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);

-      const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);

-      const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);

-      const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);

-      const __m128i v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);

-      const __m128i v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING);

-      const __m128i v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);

-      const __m128i v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING);

-      const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

-      const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

-      const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

-      const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

-      const __m128i w4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

-      const __m128i w5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

-      const __m128i w6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

-      const __m128i w7 = _mm_srai_epi32(v7, DCT_CONST_BITS);

-      // Combine

-      res1 = _mm_packs_epi32(w0, w1);

-      res7 = _mm_packs_epi32(w2, w3);

-      res5 = _mm_packs_epi32(w4, w5);

-      res3 = _mm_packs_epi32(w6, w7);

-    }

-    // Transpose the 8x8.

-    {

-      // 00 01 02 03 04 05 06 07

-      // 10 11 12 13 14 15 16 17

-      // 20 21 22 23 24 25 26 27

-      // 30 31 32 33 34 35 36 37

-      // 40 41 42 43 44 45 46 47

-      // 50 51 52 53 54 55 56 57

-      // 60 61 62 63 64 65 66 67

-      // 70 71 72 73 74 75 76 77

-      const __m128i tr0_0 = _mm_unpacklo_epi16(res0, res1);

-      const __m128i tr0_1 = _mm_unpacklo_epi16(res2, res3);

-      const __m128i tr0_2 = _mm_unpackhi_epi16(res0, res1);

-      const __m128i tr0_3 = _mm_unpackhi_epi16(res2, res3);

-      const __m128i tr0_4 = _mm_unpacklo_epi16(res4, res5);

-      const __m128i tr0_5 = _mm_unpacklo_epi16(res6, res7);

-      const __m128i tr0_6 = _mm_unpackhi_epi16(res4, res5);

-      const __m128i tr0_7 = _mm_unpackhi_epi16(res6, res7);

-      // 00 10 01 11 02 12 03 13

-      // 20 30 21 31 22 32 23 33

-      // 04 14 05 15 06 16 07 17

-      // 24 34 25 35 26 36 27 37

-      // 40 50 41 51 42 52 43 53

-      // 60 70 61 71 62 72 63 73

-      // 54 54 55 55 56 56 57 57

-      // 64 74 65 75 66 76 67 77

-      const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1);

-      const __m128i tr1_1 = _mm_unpacklo_epi32(tr0_2, tr0_3);

-      const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1);

-      const __m128i tr1_3 = _mm_unpackhi_epi32(tr0_2, tr0_3);

-      const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_4, tr0_5);

-      const __m128i tr1_5 = _mm_unpacklo_epi32(tr0_6, tr0_7);

-      const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_4, tr0_5);

-      const __m128i tr1_7 = _mm_unpackhi_epi32(tr0_6, tr0_7);

-      // 00 10 20 30 01 11 21 31

-      // 40 50 60 70 41 51 61 71

-      // 02 12 22 32 03 13 23 33

-      // 42 52 62 72 43 53 63 73

-      // 04 14 24 34 05 15 21 36

-      // 44 54 64 74 45 55 61 76

-      // 06 16 26 36 07 17 27 37

-      // 46 56 66 76 47 57 67 77

-      in0 = _mm_unpacklo_epi64(tr1_0, tr1_4);

-      in1 = _mm_unpackhi_epi64(tr1_0, tr1_4);

-      in2 = _mm_unpacklo_epi64(tr1_2, tr1_6);

-      in3 = _mm_unpackhi_epi64(tr1_2, tr1_6);

-      in4 = _mm_unpacklo_epi64(tr1_1, tr1_5);

-      in5 = _mm_unpackhi_epi64(tr1_1, tr1_5);

-      in6 = _mm_unpacklo_epi64(tr1_3, tr1_7);

-      in7 = _mm_unpackhi_epi64(tr1_3, tr1_7);

-      // 00 10 20 30 40 50 60 70

-      // 01 11 21 31 41 51 61 71

-      // 02 12 22 32 42 52 62 72

-      // 03 13 23 33 43 53 63 73

-      // 04 14 24 34 44 54 64 74

-      // 05 15 25 35 45 55 65 75

-      // 06 16 26 36 46 56 66 76

-      // 07 17 27 37 47 57 67 77

-    }

-  }

-  // Post-condition output and store it

-  {

-    // Post-condition (division by two)

-    //    division of two 16 bits signed numbers using shifts

-    //    n / 2 = (n - (n >> 15)) >> 1

-    const __m128i sign_in0 = _mm_srai_epi16(in0, 15);

-    const __m128i sign_in1 = _mm_srai_epi16(in1, 15);

-    const __m128i sign_in2 = _mm_srai_epi16(in2, 15);

-    const __m128i sign_in3 = _mm_srai_epi16(in3, 15);

-    const __m128i sign_in4 = _mm_srai_epi16(in4, 15);

-    const __m128i sign_in5 = _mm_srai_epi16(in5, 15);

-    const __m128i sign_in6 = _mm_srai_epi16(in6, 15);

-    const __m128i sign_in7 = _mm_srai_epi16(in7, 15);

-    in0 = _mm_sub_epi16(in0, sign_in0);

-    in1 = _mm_sub_epi16(in1, sign_in1);

-    in2 = _mm_sub_epi16(in2, sign_in2);

-    in3 = _mm_sub_epi16(in3, sign_in3);

-    in4 = _mm_sub_epi16(in4, sign_in4);

-    in5 = _mm_sub_epi16(in5, sign_in5);

-    in6 = _mm_sub_epi16(in6, sign_in6);

-    in7 = _mm_sub_epi16(in7, sign_in7);

-    in0 = _mm_srai_epi16(in0, 1);

-    in1 = _mm_srai_epi16(in1, 1);

-    in2 = _mm_srai_epi16(in2, 1);

-    in3 = _mm_srai_epi16(in3, 1);

-    in4 = _mm_srai_epi16(in4, 1);

-    in5 = _mm_srai_epi16(in5, 1);

-    in6 = _mm_srai_epi16(in6, 1);

-    in7 = _mm_srai_epi16(in7, 1);

-  }

-  iscan_ptr += n_coeffs;

-  qcoeff_ptr += n_coeffs;

-  dqcoeff_ptr += n_coeffs;

-  n_coeffs = -n_coeffs;

-  zero = _mm_setzero_si128();

-  if (!skip_block) {

-    __m128i eob;

-    __m128i round, quant, dequant;

-    {

-      __m128i coeff0, coeff1;

-      // Setup global values

-      {

-        round = _mm_load_si128((const __m128i*)round_ptr);

-        quant = _mm_load_si128((const __m128i*)quant_ptr);

-        dequant = _mm_load_si128((const __m128i*)dequant_ptr);

-      }

-      {

-        __m128i coeff0_sign, coeff1_sign;

-        __m128i qcoeff0, qcoeff1;

-        __m128i qtmp0, qtmp1;

-        // Do DC and first 15 AC

-        coeff0 = *in[0];

-        coeff1 = *in[1];

-        // Poor man's sign extract

-        coeff0_sign = _mm_srai_epi16(coeff0, 15);

-        coeff1_sign = _mm_srai_epi16(coeff1, 15);

-        qcoeff0 = _mm_xor_si128(coeff0, coeff0_sign);

-        qcoeff1 = _mm_xor_si128(coeff1, coeff1_sign);

-        qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);

-        qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);

-        qcoeff0 = _mm_adds_epi16(qcoeff0, round);

-        round = _mm_unpackhi_epi64(round, round);

-        qcoeff1 = _mm_adds_epi16(qcoeff1, round);

-        qtmp0 = _mm_mulhi_epi16(qcoeff0, quant);

-        quant = _mm_unpackhi_epi64(quant, quant);

-        qtmp1 = _mm_mulhi_epi16(qcoeff1, quant);

-        // Reinsert signs

-        qcoeff0 = _mm_xor_si128(qtmp0, coeff0_sign);

-        qcoeff1 = _mm_xor_si128(qtmp1, coeff1_sign);

-        qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);

-        qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);

-        _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), qcoeff0);

-        _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, qcoeff1);

-        coeff0 = _mm_mullo_epi16(qcoeff0, dequant);

-        dequant = _mm_unpackhi_epi64(dequant, dequant);

-        coeff1 = _mm_mullo_epi16(qcoeff1, dequant);

-        _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), coeff0);

-        _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, coeff1);

-      }

-      {

-        // Scan for eob

-        __m128i zero_coeff0, zero_coeff1;

-        __m128i nzero_coeff0, nzero_coeff1;

-        __m128i iscan0, iscan1;

-        __m128i eob1;

-        zero_coeff0 = _mm_cmpeq_epi16(coeff0, zero);

-        zero_coeff1 = _mm_cmpeq_epi16(coeff1, zero);

-        nzero_coeff0 = _mm_cmpeq_epi16(zero_coeff0, zero);

-        nzero_coeff1 = _mm_cmpeq_epi16(zero_coeff1, zero);

-        iscan0 = _mm_load_si128((const __m128i*)(iscan_ptr + n_coeffs));

-        iscan1 = _mm_load_si128((const __m128i*)(iscan_ptr + n_coeffs) + 1);

-        // Add one to convert from indices to counts

-        iscan0 = _mm_sub_epi16(iscan0, nzero_coeff0);

-        iscan1 = _mm_sub_epi16(iscan1, nzero_coeff1);

-        eob = _mm_and_si128(iscan0, nzero_coeff0);

-        eob1 = _mm_and_si128(iscan1, nzero_coeff1);

-        eob = _mm_max_epi16(eob, eob1);

-      }

-      n_coeffs += 8 * 2;

-    }

-    // AC only loop

-    index = 2;

-    while (n_coeffs < 0) {

-      __m128i coeff0, coeff1;

-      {

-        __m128i coeff0_sign, coeff1_sign;

-        __m128i qcoeff0, qcoeff1;

-        __m128i qtmp0, qtmp1;

-        assert(index < (int)(sizeof(in) / sizeof(in[0])) - 1);

-        coeff0 = *in[index];

-        coeff1 = *in[index + 1];

-        // Poor man's sign extract

-        coeff0_sign = _mm_srai_epi16(coeff0, 15);

-        coeff1_sign = _mm_srai_epi16(coeff1, 15);

-        qcoeff0 = _mm_xor_si128(coeff0, coeff0_sign);

-        qcoeff1 = _mm_xor_si128(coeff1, coeff1_sign);

-        qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);

-        qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);

-        qcoeff0 = _mm_adds_epi16(qcoeff0, round);

-        qcoeff1 = _mm_adds_epi16(qcoeff1, round);

-        qtmp0 = _mm_mulhi_epi16(qcoeff0, quant);

-        qtmp1 = _mm_mulhi_epi16(qcoeff1, quant);

-        // Reinsert signs

-        qcoeff0 = _mm_xor_si128(qtmp0, coeff0_sign);

-        qcoeff1 = _mm_xor_si128(qtmp1, coeff1_sign);

-        qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);

-        qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);

-        _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), qcoeff0);

-        _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, qcoeff1);

-        coeff0 = _mm_mullo_epi16(qcoeff0, dequant);

-        coeff1 = _mm_mullo_epi16(qcoeff1, dequant);

-        _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), coeff0);

-        _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, coeff1);

-      }

-      {

-        // Scan for eob

-        __m128i zero_coeff0, zero_coeff1;

-        __m128i nzero_coeff0, nzero_coeff1;

-        __m128i iscan0, iscan1;

-        __m128i eob0, eob1;

-        zero_coeff0 = _mm_cmpeq_epi16(coeff0, zero);

-        zero_coeff1 = _mm_cmpeq_epi16(coeff1, zero);

-        nzero_coeff0 = _mm_cmpeq_epi16(zero_coeff0, zero);

-        nzero_coeff1 = _mm_cmpeq_epi16(zero_coeff1, zero);

-        iscan0 = _mm_load_si128((const __m128i*)(iscan_ptr + n_coeffs));

-        iscan1 = _mm_load_si128((const __m128i*)(iscan_ptr + n_coeffs) + 1);

-        // Add one to convert from indices to counts

-        iscan0 = _mm_sub_epi16(iscan0, nzero_coeff0);

-        iscan1 = _mm_sub_epi16(iscan1, nzero_coeff1);

-        eob0 = _mm_and_si128(iscan0, nzero_coeff0);

-        eob1 = _mm_and_si128(iscan1, nzero_coeff1);

-        eob0 = _mm_max_epi16(eob0, eob1);

-        eob = _mm_max_epi16(eob, eob0);

-      }

-      n_coeffs += 8 * 2;

-      index += 2;

-    }

-    // Accumulate EOB

-    {

-      __m128i eob_shuffled;

-      eob_shuffled = _mm_shuffle_epi32(eob, 0xe);

-      eob = _mm_max_epi16(eob, eob_shuffled);

-      eob_shuffled = _mm_shufflelo_epi16(eob, 0xe);

-      eob = _mm_max_epi16(eob, eob_shuffled);

-      eob_shuffled = _mm_shufflelo_epi16(eob, 0x1);

-      eob = _mm_max_epi16(eob, eob_shuffled);

-      *eob_ptr = _mm_extract_epi16(eob, 1);

-    }

-  } else {

-    do {

-      _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), zero);

-      _mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, zero);

-      _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), zero);

-      _mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, zero);

-      n_coeffs += 8 * 2;

-    } while (n_coeffs < 0);

-    *eob_ptr = 0;

-  }

-}

-// load 8x8 array

-static INLINE void load_buffer_8x8(const int16_t *input, __m128i *in,

-                                   int stride) {

-  in[0]  = _mm_load_si128((const __m128i *)(input + 0 * stride));

-  in[1]  = _mm_load_si128((const __m128i *)(input + 1 * stride));

-  in[2]  = _mm_load_si128((const __m128i *)(input + 2 * stride));

-  in[3]  = _mm_load_si128((const __m128i *)(input + 3 * stride));

-  in[4]  = _mm_load_si128((const __m128i *)(input + 4 * stride));

-  in[5]  = _mm_load_si128((const __m128i *)(input + 5 * stride));

-  in[6]  = _mm_load_si128((const __m128i *)(input + 6 * stride));

-  in[7]  = _mm_load_si128((const __m128i *)(input + 7 * stride));

-  in[0] = _mm_slli_epi16(in[0], 2);

-  in[1] = _mm_slli_epi16(in[1], 2);

-  in[2] = _mm_slli_epi16(in[2], 2);

-  in[3] = _mm_slli_epi16(in[3], 2);

-  in[4] = _mm_slli_epi16(in[4], 2);

-  in[5] = _mm_slli_epi16(in[5], 2);

-  in[6] = _mm_slli_epi16(in[6], 2);

-  in[7] = _mm_slli_epi16(in[7], 2);

-}

-// right shift and rounding

-static INLINE void right_shift_8x8(__m128i *res, const int bit) {

-  __m128i sign0 = _mm_srai_epi16(res[0], 15);

-  __m128i sign1 = _mm_srai_epi16(res[1], 15);

-  __m128i sign2 = _mm_srai_epi16(res[2], 15);

-  __m128i sign3 = _mm_srai_epi16(res[3], 15);

-  __m128i sign4 = _mm_srai_epi16(res[4], 15);

-  __m128i sign5 = _mm_srai_epi16(res[5], 15);

-  __m128i sign6 = _mm_srai_epi16(res[6], 15);

-  __m128i sign7 = _mm_srai_epi16(res[7], 15);

-  if (bit == 2) {

-    const __m128i const_rounding = _mm_set1_epi16(1);

-    res[0] = _mm_add_epi16(res[0], const_rounding);

-    res[1] = _mm_add_epi16(res[1], const_rounding);

-    res[2] = _mm_add_epi16(res[2], const_rounding);

-    res[3] = _mm_add_epi16(res[3], const_rounding);

-    res[4] = _mm_add_epi16(res[4], const_rounding);

-    res[5] = _mm_add_epi16(res[5], const_rounding);

-    res[6] = _mm_add_epi16(res[6], const_rounding);

-    res[7] = _mm_add_epi16(res[7], const_rounding);

-  }

-  res[0] = _mm_sub_epi16(res[0], sign0);

-  res[1] = _mm_sub_epi16(res[1], sign1);

-  res[2] = _mm_sub_epi16(res[2], sign2);

-  res[3] = _mm_sub_epi16(res[3], sign3);

-  res[4] = _mm_sub_epi16(res[4], sign4);

-  res[5] = _mm_sub_epi16(res[5], sign5);

-  res[6] = _mm_sub_epi16(res[6], sign6);

-  res[7] = _mm_sub_epi16(res[7], sign7);

-  if (bit == 1) {

-    res[0] = _mm_srai_epi16(res[0], 1);

-    res[1] = _mm_srai_epi16(res[1], 1);

-    res[2] = _mm_srai_epi16(res[2], 1);

-    res[3] = _mm_srai_epi16(res[3], 1);

-    res[4] = _mm_srai_epi16(res[4], 1);

-    res[5] = _mm_srai_epi16(res[5], 1);

-    res[6] = _mm_srai_epi16(res[6], 1);

-    res[7] = _mm_srai_epi16(res[7], 1);

-  } else {

-    res[0] = _mm_srai_epi16(res[0], 2);

-    res[1] = _mm_srai_epi16(res[1], 2);

-    res[2] = _mm_srai_epi16(res[2], 2);

-    res[3] = _mm_srai_epi16(res[3], 2);

-    res[4] = _mm_srai_epi16(res[4], 2);

-    res[5] = _mm_srai_epi16(res[5], 2);

-    res[6] = _mm_srai_epi16(res[6], 2);

-    res[7] = _mm_srai_epi16(res[7], 2);

-  }

-}

-// write 8x8 array

-static INLINE void write_buffer_8x8(tran_low_t *output, __m128i *res,

-                                    int stride) {

-  store_output(&res[0], (output + 0 * stride));

-  store_output(&res[1], (output + 1 * stride));

-  store_output(&res[2], (output + 2 * stride));

-  store_output(&res[3], (output + 3 * stride));

-  store_output(&res[4], (output + 4 * stride));

-  store_output(&res[5], (output + 5 * stride));

-  store_output(&res[6], (output + 6 * stride));

-  store_output(&res[7], (output + 7 * stride));

-}

-// perform in-place transpose

-static INLINE void array_transpose_8x8(__m128i *in, __m128i *res) {

-  const __m128i tr0_0 = _mm_unpacklo_epi16(in[0], in[1]);

-  const __m128i tr0_1 = _mm_unpacklo_epi16(in[2], in[3]);

-  const __m128i tr0_2 = _mm_unpackhi_epi16(in[0], in[1]);

-  const __m128i tr0_3 = _mm_unpackhi_epi16(in[2], in[3]);

-  const __m128i tr0_4 = _mm_unpacklo_epi16(in[4], in[5]);

-  const __m128i tr0_5 = _mm_unpacklo_epi16(in[6], in[7]);

-  const __m128i tr0_6 = _mm_unpackhi_epi16(in[4], in[5]);

-  const __m128i tr0_7 = _mm_unpackhi_epi16(in[6], in[7]);

-  // 00 10 01 11 02 12 03 13

-  // 20 30 21 31 22 32 23 33

-  // 04 14 05 15 06 16 07 17

-  // 24 34 25 35 26 36 27 37

-  // 40 50 41 51 42 52 43 53

-  // 60 70 61 71 62 72 63 73

-  // 44 54 45 55 46 56 47 57

-  // 64 74 65 75 66 76 67 77

-  const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1);

-  const __m128i tr1_1 = _mm_unpacklo_epi32(tr0_4, tr0_5);

-  const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1);

-  const __m128i tr1_3 = _mm_unpackhi_epi32(tr0_4, tr0_5);

-  const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_2, tr0_3);

-  const __m128i tr1_5 = _mm_unpacklo_epi32(tr0_6, tr0_7);

-  const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_2, tr0_3);

-  const __m128i tr1_7 = _mm_unpackhi_epi32(tr0_6, tr0_7);

-  // 00 10 20 30 01 11 21 31

-  // 40 50 60 70 41 51 61 71

-  // 02 12 22 32 03 13 23 33

-  // 42 52 62 72 43 53 63 73

-  // 04 14 24 34 05 15 25 35

-  // 44 54 64 74 45 55 65 75

-  // 06 16 26 36 07 17 27 37

-  // 46 56 66 76 47 57 67 77

-  res[0] = _mm_unpacklo_epi64(tr1_0, tr1_1);

-  res[1] = _mm_unpackhi_epi64(tr1_0, tr1_1);

-  res[2] = _mm_unpacklo_epi64(tr1_2, tr1_3);

-  res[3] = _mm_unpackhi_epi64(tr1_2, tr1_3);

-  res[4] = _mm_unpacklo_epi64(tr1_4, tr1_5);

-  res[5] = _mm_unpackhi_epi64(tr1_4, tr1_5);

-  res[6] = _mm_unpacklo_epi64(tr1_6, tr1_7);

-  res[7] = _mm_unpackhi_epi64(tr1_6, tr1_7);

-  // 00 10 20 30 40 50 60 70

-  // 01 11 21 31 41 51 61 71

-  // 02 12 22 32 42 52 62 72

-  // 03 13 23 33 43 53 63 73

-  // 04 14 24 34 44 54 64 74

-  // 05 15 25 35 45 55 65 75

-  // 06 16 26 36 46 56 66 76

-  // 07 17 27 37 47 57 67 77

-}

-static void fdct8_sse2(__m128i *in) {

-  // constants

-  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

-  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

-  const __m128i k__cospi_p24_p08 = pair_set_epi16(cospi_24_64, cospi_8_64);

-  const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64, cospi_24_64);

-  const __m128i k__cospi_p28_p04 = pair_set_epi16(cospi_28_64, cospi_4_64);

-  const __m128i k__cospi_m04_p28 = pair_set_epi16(-cospi_4_64, cospi_28_64);

-  const __m128i k__cospi_p12_p20 = pair_set_epi16(cospi_12_64, cospi_20_64);

-  const __m128i k__cospi_m20_p12 = pair_set_epi16(-cospi_20_64, cospi_12_64);

-  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

-  __m128i u0, u1, u2, u3, u4, u5, u6, u7;

-  __m128i v0, v1, v2, v3, v4, v5, v6, v7;

-  __m128i s0, s1, s2, s3, s4, s5, s6, s7;

-  // stage 1

-  s0 = _mm_add_epi16(in[0], in[7]);

-  s1 = _mm_add_epi16(in[1], in[6]);

-  s2 = _mm_add_epi16(in[2], in[5]);

-  s3 = _mm_add_epi16(in[3], in[4]);

-  s4 = _mm_sub_epi16(in[3], in[4]);

-  s5 = _mm_sub_epi16(in[2], in[5]);

-  s6 = _mm_sub_epi16(in[1], in[6]);

-  s7 = _mm_sub_epi16(in[0], in[7]);

-  u0 = _mm_add_epi16(s0, s3);

-  u1 = _mm_add_epi16(s1, s2);

-  u2 = _mm_sub_epi16(s1, s2);

-  u3 = _mm_sub_epi16(s0, s3);

-  // interleave and perform butterfly multiplication/addition

-  v0 = _mm_unpacklo_epi16(u0, u1);

-  v1 = _mm_unpackhi_epi16(u0, u1);

-  v2 = _mm_unpacklo_epi16(u2, u3);

-  v3 = _mm_unpackhi_epi16(u2, u3);

-  u0 = _mm_madd_epi16(v0, k__cospi_p16_p16);

-  u1 = _mm_madd_epi16(v1, k__cospi_p16_p16);

-  u2 = _mm_madd_epi16(v0, k__cospi_p16_m16);

-  u3 = _mm_madd_epi16(v1, k__cospi_p16_m16);

-  u4 = _mm_madd_epi16(v2, k__cospi_p24_p08);

-  u5 = _mm_madd_epi16(v3, k__cospi_p24_p08);

-  u6 = _mm_madd_epi16(v2, k__cospi_m08_p24);

-  u7 = _mm_madd_epi16(v3, k__cospi_m08_p24);

-  // shift and rounding

-  v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING);

-  v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING);

-  v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING);

-  v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING);

-  v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING);

-  v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING);

-  v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING);

-  v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING);

-  u0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

-  u1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

-  u2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

-  u3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

-  u4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

-  u5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

-  u6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

-  u7 = _mm_srai_epi32(v7, DCT_CONST_BITS);

-  in[0] = _mm_packs_epi32(u0, u1);

-  in[2] = _mm_packs_epi32(u4, u5);

-  in[4] = _mm_packs_epi32(u2, u3);

-  in[6] = _mm_packs_epi32(u6, u7);

-  // stage 2

-  // interleave and perform butterfly multiplication/addition

-  u0 = _mm_unpacklo_epi16(s6, s5);

-  u1 = _mm_unpackhi_epi16(s6, s5);

-  v0 = _mm_madd_epi16(u0, k__cospi_p16_m16);

-  v1 = _mm_madd_epi16(u1, k__cospi_p16_m16);

-  v2 = _mm_madd_epi16(u0, k__cospi_p16_p16);

-  v3 = _mm_madd_epi16(u1, k__cospi_p16_p16);

-  // shift and rounding

-  u0 = _mm_add_epi32(v0, k__DCT_CONST_ROUNDING);

-  u1 = _mm_add_epi32(v1, k__DCT_CONST_ROUNDING);

-  u2 = _mm_add_epi32(v2, k__DCT_CONST_ROUNDING);

-  u3 = _mm_add_epi32(v3, k__DCT_CONST_ROUNDING);

-  v0 = _mm_srai_epi32(u0, DCT_CONST_BITS);

-  v1 = _mm_srai_epi32(u1, DCT_CONST_BITS);

-  v2 = _mm_srai_epi32(u2, DCT_CONST_BITS);

-  v3 = _mm_srai_epi32(u3, DCT_CONST_BITS);

-  u0 = _mm_packs_epi32(v0, v1);

-  u1 = _mm_packs_epi32(v2, v3);

-  // stage 3

-  s0 = _mm_add_epi16(s4, u0);

-  s1 = _mm_sub_epi16(s4, u0);

-  s2 = _mm_sub_epi16(s7, u1);

-  s3 = _mm_add_epi16(s7, u1);

-  // stage 4

-  u0 = _mm_unpacklo_epi16(s0, s3);

-  u1 = _mm_unpackhi_epi16(s0, s3);

-  u2 = _mm_unpacklo_epi16(s1, s2);

-  u3 = _mm_unpackhi_epi16(s1, s2);

-  v0 = _mm_madd_epi16(u0, k__cospi_p28_p04);

-  v1 = _mm_madd_epi16(u1, k__cospi_p28_p04);

-  v2 = _mm_madd_epi16(u2, k__cospi_p12_p20);

-  v3 = _mm_madd_epi16(u3, k__cospi_p12_p20);

-  v4 = _mm_madd_epi16(u2, k__cospi_m20_p12);

-  v5 = _mm_madd_epi16(u3, k__cospi_m20_p12);

-  v6 = _mm_madd_epi16(u0, k__cospi_m04_p28);

-  v7 = _mm_madd_epi16(u1, k__cospi_m04_p28);

-  // shift and rounding

-  u0 = _mm_add_epi32(v0, k__DCT_CONST_ROUNDING);

-  u1 = _mm_add_epi32(v1, k__DCT_CONST_ROUNDING);

-  u2 = _mm_add_epi32(v2, k__DCT_CONST_ROUNDING);

-  u3 = _mm_add_epi32(v3, k__DCT_CONST_ROUNDING);

-  u4 = _mm_add_epi32(v4, k__DCT_CONST_ROUNDING);

-  u5 = _mm_add_epi32(v5, k__DCT_CONST_ROUNDING);

-  u6 = _mm_add_epi32(v6, k__DCT_CONST_ROUNDING);

-  u7 = _mm_add_epi32(v7, k__DCT_CONST_ROUNDING);

-  v0 = _mm_srai_epi32(u0, DCT_CONST_BITS);

-  v1 = _mm_srai_epi32(u1, DCT_CONST_BITS);

-  v2 = _mm_srai_epi32(u2, DCT_CONST_BITS);

-  v3 = _mm_srai_epi32(u3, DCT_CONST_BITS);

-  v4 = _mm_srai_epi32(u4, DCT_CONST_BITS);

-  v5 = _mm_srai_epi32(u5, DCT_CONST_BITS);

-  v6 = _mm_srai_epi32(u6, DCT_CONST_BITS);

-  v7 = _mm_srai_epi32(u7, DCT_CONST_BITS);

-  in[1] = _mm_packs_epi32(v0, v1);

-  in[3] = _mm_packs_epi32(v4, v5);

-  in[5] = _mm_packs_epi32(v2, v3);

-  in[7] = _mm_packs_epi32(v6, v7);

-  // transpose

-  array_transpose_8x8(in, in);

-}

-static void fadst8_sse2(__m128i *in) {

-  // Constants

-  const __m128i k__cospi_p02_p30 = pair_set_epi16(cospi_2_64, cospi_30_64);

-  const __m128i k__cospi_p30_m02 = pair_set_epi16(cospi_30_64, -cospi_2_64);

-  const __m128i k__cospi_p10_p22 = pair_set_epi16(cospi_10_64, cospi_22_64);

-  const __m128i k__cospi_p22_m10 = pair_set_epi16(cospi_22_64, -cospi_10_64);

-  const __m128i k__cospi_p18_p14 = pair_set_epi16(cospi_18_64, cospi_14_64);

-  const __m128i k__cospi_p14_m18 = pair_set_epi16(cospi_14_64, -cospi_18_64);

-  const __m128i k__cospi_p26_p06 = pair_set_epi16(cospi_26_64, cospi_6_64);

-  const __m128i k__cospi_p06_m26 = pair_set_epi16(cospi_6_64, -cospi_26_64);

-  const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);

-  const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);

-  const __m128i k__cospi_m24_p08 = pair_set_epi16(-cospi_24_64, cospi_8_64);

-  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

-  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

-  const __m128i k__const_0 = _mm_set1_epi16(0);

-  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

-  __m128i u0, u1, u2, u3, u4, u5, u6, u7, u8, u9, u10, u11, u12, u13, u14, u15;

-  __m128i v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15;

-  __m128i w0, w1, w2, w3, w4, w5, w6, w7, w8, w9, w10, w11, w12, w13, w14, w15;

-  __m128i s0, s1, s2, s3, s4, s5, s6, s7;

-  __m128i in0, in1, in2, in3, in4, in5, in6, in7;

-  // properly aligned for butterfly input

-  in0  = in[7];

-  in1  = in[0];

-  in2  = in[5];

-  in3  = in[2];

-  in4  = in[3];

-  in5  = in[4];

-  in6  = in[1];

-  in7  = in[6];

-  // column transformation

-  // stage 1

-  // interleave and multiply/add into 32-bit integer

-  s0 = _mm_unpacklo_epi16(in0, in1);

-  s1 = _mm_unpackhi_epi16(in0, in1);

-  s2 = _mm_unpacklo_epi16(in2, in3);

-  s3 = _mm_unpackhi_epi16(in2, in3);

-  s4 = _mm_unpacklo_epi16(in4, in5);

-  s5 = _mm_unpackhi_epi16(in4, in5);

-  s6 = _mm_unpacklo_epi16(in6, in7);

-  s7 = _mm_unpackhi_epi16(in6, in7);

-  u0 = _mm_madd_epi16(s0, k__cospi_p02_p30);

-  u1 = _mm_madd_epi16(s1, k__cospi_p02_p30);

-  u2 = _mm_madd_epi16(s0, k__cospi_p30_m02);

-  u3 = _mm_madd_epi16(s1, k__cospi_p30_m02);

-  u4 = _mm_madd_epi16(s2, k__cospi_p10_p22);

-  u5 = _mm_madd_epi16(s3, k__cospi_p10_p22);

-  u6 = _mm_madd_epi16(s2, k__cospi_p22_m10);

-  u7 = _mm_madd_epi16(s3, k__cospi_p22_m10);

-  u8 = _mm_madd_epi16(s4, k__cospi_p18_p14);

-  u9 = _mm_madd_epi16(s5, k__cospi_p18_p14);

-  u10 = _mm_madd_epi16(s4, k__cospi_p14_m18);

-  u11 = _mm_madd_epi16(s5, k__cospi_p14_m18);

-  u12 = _mm_madd_epi16(s6, k__cospi_p26_p06);

-  u13 = _mm_madd_epi16(s7, k__cospi_p26_p06);

-  u14 = _mm_madd_epi16(s6, k__cospi_p06_m26);

-  u15 = _mm_madd_epi16(s7, k__cospi_p06_m26);

-  // addition

-  w0 = _mm_add_epi32(u0, u8);

-  w1 = _mm_add_epi32(u1, u9);

-  w2 = _mm_add_epi32(u2, u10);

-  w3 = _mm_add_epi32(u3, u11);

-  w4 = _mm_add_epi32(u4, u12);

-  w5 = _mm_add_epi32(u5, u13);

-  w6 = _mm_add_epi32(u6, u14);

-  w7 = _mm_add_epi32(u7, u15);

-  w8 = _mm_sub_epi32(u0, u8);

-  w9 = _mm_sub_epi32(u1, u9);

-  w10 = _mm_sub_epi32(u2, u10);

-  w11 = _mm_sub_epi32(u3, u11);

-  w12 = _mm_sub_epi32(u4, u12);

-  w13 = _mm_sub_epi32(u5, u13);

-  w14 = _mm_sub_epi32(u6, u14);

-  w15 = _mm_sub_epi32(u7, u15);

-  // shift and rounding

-  v0 = _mm_add_epi32(w0, k__DCT_CONST_ROUNDING);

-  v1 = _mm_add_epi32(w1, k__DCT_CONST_ROUNDING);

-  v2 = _mm_add_epi32(w2, k__DCT_CONST_ROUNDING);

-  v3 = _mm_add_epi32(w3, k__DCT_CONST_ROUNDING);

-  v4 = _mm_add_epi32(w4, k__DCT_CONST_ROUNDING);

-  v5 = _mm_add_epi32(w5, k__DCT_CONST_ROUNDING);

-  v6 = _mm_add_epi32(w6, k__DCT_CONST_ROUNDING);

-  v7 = _mm_add_epi32(w7, k__DCT_CONST_ROUNDING);

-  v8 = _mm_add_epi32(w8, k__DCT_CONST_ROUNDING);

-  v9 = _mm_add_epi32(w9, k__DCT_CONST_ROUNDING);

-  v10 = _mm_add_epi32(w10, k__DCT_CONST_ROUNDING);

-  v11 = _mm_add_epi32(w11, k__DCT_CONST_ROUNDING);

-  v12 = _mm_add_epi32(w12, k__DCT_CONST_ROUNDING);

-  v13 = _mm_add_epi32(w13, k__DCT_CONST_ROUNDING);

-  v14 = _mm_add_epi32(w14, k__DCT_CONST_ROUNDING);

-  v15 = _mm_add_epi32(w15, k__DCT_CONST_ROUNDING);

-  u0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

-  u1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

-  u2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

-  u3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

-  u4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

-  u5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

-  u6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

-  u7 = _mm_srai_epi32(v7, DCT_CONST_BITS);

-  u8 = _mm_srai_epi32(v8, DCT_CONST_BITS);

-  u9 = _mm_srai_epi32(v9, DCT_CONST_BITS);

-  u10 = _mm_srai_epi32(v10, DCT_CONST_BITS);

-  u11 = _mm_srai_epi32(v11, DCT_CONST_BITS);

-  u12 = _mm_srai_epi32(v12, DCT_CONST_BITS);

-  u13 = _mm_srai_epi32(v13, DCT_CONST_BITS);

-  u14 = _mm_srai_epi32(v14, DCT_CONST_BITS);

-  u15 = _mm_srai_epi32(v15, DCT_CONST_BITS);

-  // back to 16-bit and pack 8 integers into __m128i

-  in[0] = _mm_packs_epi32(u0, u1);

-  in[1] = _mm_packs_epi32(u2, u3);

-  in[2] = _mm_packs_epi32(u4, u5);

-  in[3] = _mm_packs_epi32(u6, u7);

-  in[4] = _mm_packs_epi32(u8, u9);

-  in[5] = _mm_packs_epi32(u10, u11);

-  in[6] = _mm_packs_epi32(u12, u13);

-  in[7] = _mm_packs_epi32(u14, u15);

-  // stage 2

-  s0 = _mm_add_epi16(in[0], in[2]);

-  s1 = _mm_add_epi16(in[1], in[3]);

-  s2 = _mm_sub_epi16(in[0], in[2]);

-  s3 = _mm_sub_epi16(in[1], in[3]);

-  u0 = _mm_unpacklo_epi16(in[4], in[5]);

-  u1 = _mm_unpackhi_epi16(in[4], in[5]);

-  u2 = _mm_unpacklo_epi16(in[6], in[7]);

-  u3 = _mm_unpackhi_epi16(in[6], in[7]);

-  v0 = _mm_madd_epi16(u0, k__cospi_p08_p24);

-  v1 = _mm_madd_epi16(u1, k__cospi_p08_p24);

-  v2 = _mm_madd_epi16(u0, k__cospi_p24_m08);

-  v3 = _mm_madd_epi16(u1, k__cospi_p24_m08);

-  v4 = _mm_madd_epi16(u2, k__cospi_m24_p08);

-  v5 = _mm_madd_epi16(u3, k__cospi_m24_p08);

-  v6 = _mm_madd_epi16(u2, k__cospi_p08_p24);

-  v7 = _mm_madd_epi16(u3, k__cospi_p08_p24);

-  w0 = _mm_add_epi32(v0, v4);

-  w1 = _mm_add_epi32(v1, v5);

-  w2 = _mm_add_epi32(v2, v6);

-  w3 = _mm_add_epi32(v3, v7);

-  w4 = _mm_sub_epi32(v0, v4);

-  w5 = _mm_sub_epi32(v1, v5);

-  w6 = _mm_sub_epi32(v2, v6);

-  w7 = _mm_sub_epi32(v3, v7);

-  v0 = _mm_add_epi32(w0, k__DCT_CONST_ROUNDING);

-  v1 = _mm_add_epi32(w1, k__DCT_CONST_ROUNDING);

-  v2 = _mm_add_epi32(w2, k__DCT_CONST_ROUNDING);

-  v3 = _mm_add_epi32(w3, k__DCT_CONST_ROUNDING);

-  v4 = _mm_add_epi32(w4, k__DCT_CONST_ROUNDING);

-  v5 = _mm_add_epi32(w5, k__DCT_CONST_ROUNDING);

-  v6 = _mm_add_epi32(w6, k__DCT_CONST_ROUNDING);

-  v7 = _mm_add_epi32(w7, k__DCT_CONST_ROUNDING);

-  u0 = _mm_srai_epi32(v0, DCT_CONST_BITS);

-  u1 = _mm_srai_epi32(v1, DCT_CONST_BITS);

-  u2 = _mm_srai_epi32(v2, DCT_CONST_BITS);

-  u3 = _mm_srai_epi32(v3, DCT_CONST_BITS);

-  u4 = _mm_srai_epi32(v4, DCT_CONST_BITS);

-  u5 = _mm_srai_epi32(v5, DCT_CONST_BITS);

-  u6 = _mm_srai_epi32(v6, DCT_CONST_BITS);

-  u7 = _mm_srai_epi32(v7, DCT_CONST_BITS);

-  // back to 16-bit intergers

-  s4 = _mm_packs_epi32(u0, u1);

-  s5 = _mm_packs_epi32(u2, u3);

-  s6 = _mm_packs_epi32(u4, u5);

-  s7 = _mm_packs_epi32(u6, u7);

-  // stage 3

-  u0 = _mm_unpacklo_epi16(s2, s3);

-  u1 = _mm_unpackhi_epi16(s2, s3);

-  u2 = _mm_unpacklo_epi16(s6, s7);

-  u3 = _mm_unpackhi_epi16(s6, s7);

-  v0 = _mm_madd_epi16(u0, k__cospi_p16_p16);

-  v1 = _mm_madd_epi16(u1, k__cospi_p16_p16);

-  v2 = _mm_madd_epi16(u0, k__cospi_p16_m16);

-  v3 = _mm_madd_epi16(u1, k__cospi_p16_m16);

-  v4 = _mm_madd_epi16(u2, k__cospi_p16_p16);

-  v5 = _mm_madd_epi16(u3, k__cospi_p16_p16);

-  v6 = _mm_madd_epi16(u2, k__cospi_p16_m16);

-  v7 = _mm_madd_epi16(u3, k__cospi_p16_m16);

-  u0 = _mm_add_epi32(v0, k__DCT_CONST_ROUNDING);

-  u1 = _mm_add_epi32(v1, k__DCT_CONST_ROUNDING);

-  u2 = _mm_add_epi32(v2, k__DCT_CONST_ROUNDING);

-  u3 = _mm_add_epi32(v3, k__DCT_CONST_ROUNDING);

-  u4 = _mm_add_epi32(v4, k__DCT_CONST_ROUNDING);

-  u5 = _mm_add_epi32(v5, k__DCT_CONST_ROUNDING);

-  u6 = _mm_add_epi32(v6, k__DCT_CONST_ROUNDING);

-  u7 = _mm_add_epi32(v7, k__DCT_CONST_ROUNDING);

-  v0 = _mm_srai_epi32(u0, DCT_CONST_BITS);

-  v1 = _mm_srai_epi32(u1, DCT_CONST_BITS);

-  v2 = _mm_srai_epi32(u2, DCT_CONST_BITS);

-  v3 = _mm_srai_epi32(u3, DCT_CONST_BITS);

-  v4 = _mm_srai_epi32(u4, DCT_CONST_BITS);

-  v5 = _mm_srai_epi32(u5, DCT_CONST_BITS);

-  v6 = _mm_srai_epi32(u6, DCT_CONST_BITS);

-  v7 = _mm_srai_epi32(u7, DCT_CONST_BITS);

-  s2 = _mm_packs_epi32(v0, v1);

-  s3 = _mm_packs_epi32(v2, v3);

-  s6 = _mm_packs_epi32(v4, v5);

-  s7 = _mm_packs_epi32(v6, v7);

-  // FIXME(jingning): do subtract using bit inversion?

-  in[0] = s0;

-  in[1] = _mm_sub_epi16(k__const_0, s4);

-  in[2] = s6;

-  in[3] = _mm_sub_epi16(k__const_0, s2);

-  in[4] = s3;

-  in[5] = _mm_sub_epi16(k__const_0, s7);

-  in[6] = s5;

-  in[7] = _mm_sub_epi16(k__const_0, s1);

-  // transpose

-  array_transpose_8x8(in, in);

-}

-void vp9_fht8x8_sse2(const int16_t *input, tran_low_t *output,

-                     int stride, int tx_type) {

-  __m128i in[8];

-  switch (tx_type) {

-    case DCT_DCT:

-      vpx_fdct8x8_sse2(input, output, stride);

-      break;

-    case ADST_DCT:

-      load_buffer_8x8(input, in, stride);

-      fadst8_sse2(in);

-      fdct8_sse2(in);

-      right_shift_8x8(in, 1);

-      write_buffer_8x8(output, in, 8);

-      break;

-    case DCT_ADST:

-      load_buffer_8x8(input, in, stride);

-      fdct8_sse2(in);

-      fadst8_sse2(in);

-      right_shift_8x8(in, 1);

-      write_buffer_8x8(output, in, 8);

-      break;

-    case ADST_ADST:

-      load_buffer_8x8(input, in, stride);

-      fadst8_sse2(in);

-      fadst8_sse2(in);

-      right_shift_8x8(in, 1);

-      write_buffer_8x8(output, in, 8);

-      break;

-    default:

-      assert(0);

-      break;

-  }

-}

-static INLINE void load_buffer_16x16(const int16_t* input, __m128i *in0,

-                                     __m128i *in1, int stride) {

-  // load first 8 columns

-  load_buffer_8x8(input, in0, stride);

-  load_buffer_8x8(input + 8 * stride, in0 + 8, stride);

-  input += 8;

-  // load second 8 columns

-  load_buffer_8x8(input, in1, stride);

-  load_buffer_8x8(input + 8 * stride, in1 + 8, stride);

-}

-static INLINE void write_buffer_16x16(tran_low_t *output, __m128i *in0,

-                                      __m128i *in1, int stride) {

-  // write first 8 columns

-  write_buffer_8x8(output, in0, stride);

-  write_buffer_8x8(output + 8 * stride, in0 + 8, stride);

-  // write second 8 columns

-  output += 8;

-  write_buffer_8x8(output, in1, stride);

-  write_buffer_8x8(output + 8 * stride, in1 + 8, stride);

-}

-static INLINE void array_transpose_16x16(__m128i *res0, __m128i *res1) {

-  __m128i tbuf[8];

-  array_transpose_8x8(res0, res0);

-  array_transpose_8x8(res1, tbuf);

-  array_transpose_8x8(res0 + 8, res1);

-  array_transpose_8x8(res1 + 8, res1 + 8);

-  res0[8] = tbuf[0];

-  res0[9] = tbuf[1];

-  res0[10] = tbuf[2];

-  res0[11] = tbuf[3];

-  res0[12] = tbuf[4];

-  res0[13] = tbuf[5];

-  res0[14] = tbuf[6];

-  res0[15] = tbuf[7];

-}

-static INLINE void right_shift_16x16(__m128i *res0, __m128i *res1) {

-  // perform rounding operations

-  right_shift_8x8(res0, 2);

-  right_shift_8x8(res0 + 8, 2);

-  right_shift_8x8(res1, 2);

-  right_shift_8x8(res1 + 8, 2);

-}

-static void fdct16_8col(__m128i *in) {

-  // perform 16x16 1-D DCT for 8 columns

-  __m128i i[8], s[8], p[8], t[8], u[16], v[16];

-  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

-  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

-  const __m128i k__cospi_m16_p16 = pair_set_epi16(-cospi_16_64, cospi_16_64);

-  const __m128i k__cospi_p24_p08 = pair_set_epi16(cospi_24_64, cospi_8_64);

-  const __m128i k__cospi_p08_m24 = pair_set_epi16(cospi_8_64, -cospi_24_64);

-  const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64, cospi_24_64);

-  const __m128i k__cospi_p28_p04 = pair_set_epi16(cospi_28_64, cospi_4_64);

-  const __m128i k__cospi_m04_p28 = pair_set_epi16(-cospi_4_64, cospi_28_64);

-  const __m128i k__cospi_p12_p20 = pair_set_epi16(cospi_12_64, cospi_20_64);

-  const __m128i k__cospi_m20_p12 = pair_set_epi16(-cospi_20_64, cospi_12_64);

-  const __m128i k__cospi_p30_p02 = pair_set_epi16(cospi_30_64, cospi_2_64);

-  const __m128i k__cospi_p14_p18 = pair_set_epi16(cospi_14_64, cospi_18_64);

-  const __m128i k__cospi_m02_p30 = pair_set_epi16(-cospi_2_64, cospi_30_64);

-  const __m128i k__cospi_m18_p14 = pair_set_epi16(-cospi_18_64, cospi_14_64);

-  const __m128i k__cospi_p22_p10 = pair_set_epi16(cospi_22_64, cospi_10_64);

-  const __m128i k__cospi_p06_p26 = pair_set_epi16(cospi_6_64, cospi_26_64);

-  const __m128i k__cospi_m10_p22 = pair_set_epi16(-cospi_10_64, cospi_22_64);

-  const __m128i k__cospi_m26_p06 = pair_set_epi16(-cospi_26_64, cospi_6_64);

-  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

-  // stage 1

-  i[0] = _mm_add_epi16(in[0], in[15]);

-  i[1] = _mm_add_epi16(in[1], in[14]);

-  i[2] = _mm_add_epi16(in[2], in[13]);

-  i[3] = _mm_add_epi16(in[3], in[12]);

-  i[4] = _mm_add_epi16(in[4], in[11]);

-  i[5] = _mm_add_epi16(in[5], in[10]);

-  i[6] = _mm_add_epi16(in[6], in[9]);

-  i[7] = _mm_add_epi16(in[7], in[8]);

-  s[0] = _mm_sub_epi16(in[7], in[8]);

-  s[1] = _mm_sub_epi16(in[6], in[9]);

-  s[2] = _mm_sub_epi16(in[5], in[10]);

-  s[3] = _mm_sub_epi16(in[4], in[11]);

-  s[4] = _mm_sub_epi16(in[3], in[12]);

-  s[5] = _mm_sub_epi16(in[2], in[13]);

-  s[6] = _mm_sub_epi16(in[1], in[14]);

-  s[7] = _mm_sub_epi16(in[0], in[15]);

-  p[0] = _mm_add_epi16(i[0], i[7]);

-  p[1] = _mm_add_epi16(i[1], i[6]);

-  p[2] = _mm_add_epi16(i[2], i[5]);

-  p[3] = _mm_add_epi16(i[3], i[4]);

-  p[4] = _mm_sub_epi16(i[3], i[4]);

-  p[5] = _mm_sub_epi16(i[2], i[5]);

-  p[6] = _mm_sub_epi16(i[1], i[6]);

-  p[7] = _mm_sub_epi16(i[0], i[7]);

-  u[0] = _mm_add_epi16(p[0], p[3]);

-  u[1] = _mm_add_epi16(p[1], p[2]);

-  u[2] = _mm_sub_epi16(p[1], p[2]);

-  u[3] = _mm_sub_epi16(p[0], p[3]);

-  v[0] = _mm_unpacklo_epi16(u[0], u[1]);

-  v[1] = _mm_unpackhi_epi16(u[0], u[1]);

-  v[2] = _mm_unpacklo_epi16(u[2], u[3]);

-  v[3] = _mm_unpackhi_epi16(u[2], u[3]);

-  u[0] = _mm_madd_epi16(v[0], k__cospi_p16_p16);

-  u[1] = _mm_madd_epi16(v[1], k__cospi_p16_p16);

-  u[2] = _mm_madd_epi16(v[0], k__cospi_p16_m16);

-  u[3] = _mm_madd_epi16(v[1], k__cospi_p16_m16);

-  u[4] = _mm_madd_epi16(v[2], k__cospi_p24_p08);

-  u[5] = _mm_madd_epi16(v[3], k__cospi_p24_p08);

-  u[6] = _mm_madd_epi16(v[2], k__cospi_m08_p24);

-  u[7] = _mm_madd_epi16(v[3], k__cospi_m08_p24);

-  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

-  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

-  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

-  v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

-  v[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);

-  v[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);

-  v[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);

-  v[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);

-  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

-  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

-  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

-  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);

-  u[4] = _mm_srai_epi32(v[4], DCT_CONST_BITS);

-  u[5] = _mm_srai_epi32(v[5], DCT_CONST_BITS);

-  u[6] = _mm_srai_epi32(v[6], DCT_CONST_BITS);

-  u[7] = _mm_srai_epi32(v[7], DCT_CONST_BITS);

-  in[0] = _mm_packs_epi32(u[0], u[1]);

-  in[4] = _mm_packs_epi32(u[4], u[5]);

-  in[8] = _mm_packs_epi32(u[2], u[3]);

-  in[12] = _mm_packs_epi32(u[6], u[7]);

-  u[0] = _mm_unpacklo_epi16(p[5], p[6]);

-  u[1] = _mm_unpackhi_epi16(p[5], p[6]);

-  v[0] = _mm_madd_epi16(u[0], k__cospi_m16_p16);

-  v[1] = _mm_madd_epi16(u[1], k__cospi_m16_p16);

-  v[2] = _mm_madd_epi16(u[0], k__cospi_p16_p16);

-  v[3] = _mm_madd_epi16(u[1], k__cospi_p16_p16);

-  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

-  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

-  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

-  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

-  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

-  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

-  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

-  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

-  u[0] = _mm_packs_epi32(v[0], v[1]);

-  u[1] = _mm_packs_epi32(v[2], v[3]);

-  t[0] = _mm_add_epi16(p[4], u[0]);

-  t[1] = _mm_sub_epi16(p[4], u[0]);

-  t[2] = _mm_sub_epi16(p[7], u[1]);

-  t[3] = _mm_add_epi16(p[7], u[1]);

-  u[0] = _mm_unpacklo_epi16(t[0], t[3]);

-  u[1] = _mm_unpackhi_epi16(t[0], t[3]);

-  u[2] = _mm_unpacklo_epi16(t[1], t[2]);

-  u[3] = _mm_unpackhi_epi16(t[1], t[2]);

-  v[0] = _mm_madd_epi16(u[0], k__cospi_p28_p04);

-  v[1] = _mm_madd_epi16(u[1], k__cospi_p28_p04);

-  v[2] = _mm_madd_epi16(u[2], k__cospi_p12_p20);

-  v[3] = _mm_madd_epi16(u[3], k__cospi_p12_p20);

-  v[4] = _mm_madd_epi16(u[2], k__cospi_m20_p12);

-  v[5] = _mm_madd_epi16(u[3], k__cospi_m20_p12);

-  v[6] = _mm_madd_epi16(u[0], k__cospi_m04_p28);

-  v[7] = _mm_madd_epi16(u[1], k__cospi_m04_p28);

-  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

-  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

-  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

-  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

-  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

-  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

-  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

-  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);

-  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

-  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

-  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

-  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

-  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

-  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

-  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

-  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

-  in[2] = _mm_packs_epi32(v[0], v[1]);

-  in[6] = _mm_packs_epi32(v[4], v[5]);

-  in[10] = _mm_packs_epi32(v[2], v[3]);

-  in[14] = _mm_packs_epi32(v[6], v[7]);

-  // stage 2

-  u[0] = _mm_unpacklo_epi16(s[2], s[5]);

-  u[1] = _mm_unpackhi_epi16(s[2], s[5]);

-  u[2] = _mm_unpacklo_epi16(s[3], s[4]);

-  u[3] = _mm_unpackhi_epi16(s[3], s[4]);

-  v[0] = _mm_madd_epi16(u[0], k__cospi_m16_p16);

-  v[1] = _mm_madd_epi16(u[1], k__cospi_m16_p16);

-  v[2] = _mm_madd_epi16(u[2], k__cospi_m16_p16);

-  v[3] = _mm_madd_epi16(u[3], k__cospi_m16_p16);

-  v[4] = _mm_madd_epi16(u[2], k__cospi_p16_p16);

-  v[5] = _mm_madd_epi16(u[3], k__cospi_p16_p16);

-  v[6] = _mm_madd_epi16(u[0], k__cospi_p16_p16);

-  v[7] = _mm_madd_epi16(u[1], k__cospi_p16_p16);

-  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

-  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

-  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

-  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

-  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

-  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

-  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

-  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);

-  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

-  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

-  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

-  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

-  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

-  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

-  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

-  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

-  t[2] = _mm_packs_epi32(v[0], v[1]);

-  t[3] = _mm_packs_epi32(v[2], v[3]);

-  t[4] = _mm_packs_epi32(v[4], v[5]);

-  t[5] = _mm_packs_epi32(v[6], v[7]);

-  // stage 3

-  p[0] = _mm_add_epi16(s[0], t[3]);

-  p[1] = _mm_add_epi16(s[1], t[2]);

-  p[2] = _mm_sub_epi16(s[1], t[2]);

-  p[3] = _mm_sub_epi16(s[0], t[3]);

-  p[4] = _mm_sub_epi16(s[7], t[4]);

-  p[5] = _mm_sub_epi16(s[6], t[5]);

-  p[6] = _mm_add_epi16(s[6], t[5]);

-  p[7] = _mm_add_epi16(s[7], t[4]);

-  // stage 4

-  u[0] = _mm_unpacklo_epi16(p[1], p[6]);

-  u[1] = _mm_unpackhi_epi16(p[1], p[6]);

-  u[2] = _mm_unpacklo_epi16(p[2], p[5]);

-  u[3] = _mm_unpackhi_epi16(p[2], p[5]);

-  v[0] = _mm_madd_epi16(u[0], k__cospi_m08_p24);

-  v[1] = _mm_madd_epi16(u[1], k__cospi_m08_p24);

-  v[2] = _mm_madd_epi16(u[2], k__cospi_p24_p08);

-  v[3] = _mm_madd_epi16(u[3], k__cospi_p24_p08);

-  v[4] = _mm_madd_epi16(u[2], k__cospi_p08_m24);

-  v[5] = _mm_madd_epi16(u[3], k__cospi_p08_m24);

-  v[6] = _mm_madd_epi16(u[0], k__cospi_p24_p08);

-  v[7] = _mm_madd_epi16(u[1], k__cospi_p24_p08);

-  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

-  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

-  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

-  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

-  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

-  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

-  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

-  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);

-  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

-  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

-  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

-  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

-  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

-  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

-  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

-  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

-  t[1] = _mm_packs_epi32(v[0], v[1]);

-  t[2] = _mm_packs_epi32(v[2], v[3]);

-  t[5] = _mm_packs_epi32(v[4], v[5]);

-  t[6] = _mm_packs_epi32(v[6], v[7]);

-  // stage 5

-  s[0] = _mm_add_epi16(p[0], t[1]);

-  s[1] = _mm_sub_epi16(p[0], t[1]);

-  s[2] = _mm_add_epi16(p[3], t[2]);

-  s[3] = _mm_sub_epi16(p[3], t[2]);

-  s[4] = _mm_sub_epi16(p[4], t[5]);

-  s[5] = _mm_add_epi16(p[4], t[5]);

-  s[6] = _mm_sub_epi16(p[7], t[6]);

-  s[7] = _mm_add_epi16(p[7], t[6]);

-  // stage 6

-  u[0] = _mm_unpacklo_epi16(s[0], s[7]);

-  u[1] = _mm_unpackhi_epi16(s[0], s[7]);

-  u[2] = _mm_unpacklo_epi16(s[1], s[6]);

-  u[3] = _mm_unpackhi_epi16(s[1], s[6]);

-  u[4] = _mm_unpacklo_epi16(s[2], s[5]);

-  u[5] = _mm_unpackhi_epi16(s[2], s[5]);

-  u[6] = _mm_unpacklo_epi16(s[3], s[4]);

-  u[7] = _mm_unpackhi_epi16(s[3], s[4]);

-  v[0] = _mm_madd_epi16(u[0], k__cospi_p30_p02);

-  v[1] = _mm_madd_epi16(u[1], k__cospi_p30_p02);

-  v[2] = _mm_madd_epi16(u[2], k__cospi_p14_p18);

-  v[3] = _mm_madd_epi16(u[3], k__cospi_p14_p18);

-  v[4] = _mm_madd_epi16(u[4], k__cospi_p22_p10);

-  v[5] = _mm_madd_epi16(u[5], k__cospi_p22_p10);

-  v[6] = _mm_madd_epi16(u[6], k__cospi_p06_p26);

-  v[7] = _mm_madd_epi16(u[7], k__cospi_p06_p26);

-  v[8] = _mm_madd_epi16(u[6], k__cospi_m26_p06);

-  v[9] = _mm_madd_epi16(u[7], k__cospi_m26_p06);

-  v[10] = _mm_madd_epi16(u[4], k__cospi_m10_p22);

-  v[11] = _mm_madd_epi16(u[5], k__cospi_m10_p22);

-  v[12] = _mm_madd_epi16(u[2], k__cospi_m18_p14);

-  v[13] = _mm_madd_epi16(u[3], k__cospi_m18_p14);

-  v[14] = _mm_madd_epi16(u[0], k__cospi_m02_p30);

-  v[15] = _mm_madd_epi16(u[1], k__cospi_m02_p30);

-  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

-  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

-  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

-  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

-  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

-  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

-  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

-  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);

-  u[8] = _mm_add_epi32(v[8], k__DCT_CONST_ROUNDING);

-  u[9] = _mm_add_epi32(v[9], k__DCT_CONST_ROUNDING);

-  u[10] = _mm_add_epi32(v[10], k__DCT_CONST_ROUNDING);

-  u[11] = _mm_add_epi32(v[11], k__DCT_CONST_ROUNDING);

-  u[12] = _mm_add_epi32(v[12], k__DCT_CONST_ROUNDING);

-  u[13] = _mm_add_epi32(v[13], k__DCT_CONST_ROUNDING);

-  u[14] = _mm_add_epi32(v[14], k__DCT_CONST_ROUNDING);

-  u[15] = _mm_add_epi32(v[15], k__DCT_CONST_ROUNDING);

-  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

-  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

-  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

-  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

-  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

-  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

-  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

-  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

-  v[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);

-  v[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);

-  v[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);

-  v[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);

-  v[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);

-  v[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);

-  v[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);

-  v[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);

-  in[1]  = _mm_packs_epi32(v[0], v[1]);

-  in[9]  = _mm_packs_epi32(v[2], v[3]);

-  in[5]  = _mm_packs_epi32(v[4], v[5]);

-  in[13] = _mm_packs_epi32(v[6], v[7]);

-  in[3]  = _mm_packs_epi32(v[8], v[9]);

-  in[11] = _mm_packs_epi32(v[10], v[11]);

-  in[7]  = _mm_packs_epi32(v[12], v[13]);

-  in[15] = _mm_packs_epi32(v[14], v[15]);

-}

-static void fadst16_8col(__m128i *in) {

-  // perform 16x16 1-D ADST for 8 columns

-  __m128i s[16], x[16], u[32], v[32];

-  const __m128i k__cospi_p01_p31 = pair_set_epi16(cospi_1_64, cospi_31_64);

-  const __m128i k__cospi_p31_m01 = pair_set_epi16(cospi_31_64, -cospi_1_64);

-  const __m128i k__cospi_p05_p27 = pair_set_epi16(cospi_5_64, cospi_27_64);

-  const __m128i k__cospi_p27_m05 = pair_set_epi16(cospi_27_64, -cospi_5_64);

-  const __m128i k__cospi_p09_p23 = pair_set_epi16(cospi_9_64, cospi_23_64);

-  const __m128i k__cospi_p23_m09 = pair_set_epi16(cospi_23_64, -cospi_9_64);

-  const __m128i k__cospi_p13_p19 = pair_set_epi16(cospi_13_64, cospi_19_64);

-  const __m128i k__cospi_p19_m13 = pair_set_epi16(cospi_19_64, -cospi_13_64);

-  const __m128i k__cospi_p17_p15 = pair_set_epi16(cospi_17_64, cospi_15_64);

-  const __m128i k__cospi_p15_m17 = pair_set_epi16(cospi_15_64, -cospi_17_64);

-  const __m128i k__cospi_p21_p11 = pair_set_epi16(cospi_21_64, cospi_11_64);

-  const __m128i k__cospi_p11_m21 = pair_set_epi16(cospi_11_64, -cospi_21_64);

-  const __m128i k__cospi_p25_p07 = pair_set_epi16(cospi_25_64, cospi_7_64);

-  const __m128i k__cospi_p07_m25 = pair_set_epi16(cospi_7_64, -cospi_25_64);

-  const __m128i k__cospi_p29_p03 = pair_set_epi16(cospi_29_64, cospi_3_64);

-  const __m128i k__cospi_p03_m29 = pair_set_epi16(cospi_3_64, -cospi_29_64);

-  const __m128i k__cospi_p04_p28 = pair_set_epi16(cospi_4_64, cospi_28_64);

-  const __m128i k__cospi_p28_m04 = pair_set_epi16(cospi_28_64, -cospi_4_64);

-  const __m128i k__cospi_p20_p12 = pair_set_epi16(cospi_20_64, cospi_12_64);

-  const __m128i k__cospi_p12_m20 = pair_set_epi16(cospi_12_64, -cospi_20_64);

-  const __m128i k__cospi_m28_p04 = pair_set_epi16(-cospi_28_64, cospi_4_64);

-  const __m128i k__cospi_m12_p20 = pair_set_epi16(-cospi_12_64, cospi_20_64);

-  const __m128i k__cospi_p08_p24 = pair_set_epi16(cospi_8_64, cospi_24_64);

-  const __m128i k__cospi_p24_m08 = pair_set_epi16(cospi_24_64, -cospi_8_64);

-  const __m128i k__cospi_m24_p08 = pair_set_epi16(-cospi_24_64, cospi_8_64);

-  const __m128i k__cospi_m16_m16 = _mm_set1_epi16((int16_t)-cospi_16_64);

-  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);

-  const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64);

-  const __m128i k__cospi_m16_p16 = pair_set_epi16(-cospi_16_64, cospi_16_64);

-  const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING);

-  const __m128i kZero = _mm_set1_epi16(0);

-  u[0] = _mm_unpacklo_epi16(in[15], in[0]);

-  u[1] = _mm_unpackhi_epi16(in[15], in[0]);

-  u[2] = _mm_unpacklo_epi16(in[13], in[2]);

-  u[3] = _mm_unpackhi_epi16(in[13], in[2]);

-  u[4] = _mm_unpacklo_epi16(in[11], in[4]);

-  u[5] = _mm_unpackhi_epi16(in[11], in[4]);

-  u[6] = _mm_unpacklo_epi16(in[9], in[6]);

-  u[7] = _mm_unpackhi_epi16(in[9], in[6]);

-  u[8] = _mm_unpacklo_epi16(in[7], in[8]);

-  u[9] = _mm_unpackhi_epi16(in[7], in[8]);

-  u[10] = _mm_unpacklo_epi16(in[5], in[10]);

-  u[11] = _mm_unpackhi_epi16(in[5], in[10]);

-  u[12] = _mm_unpacklo_epi16(in[3], in[12]);

-  u[13] = _mm_unpackhi_epi16(in[3], in[12]);

-  u[14] = _mm_unpacklo_epi16(in[1], in[14]);

-  u[15] = _mm_unpackhi_epi16(in[1], in[14]);

-  v[0] = _mm_madd_epi16(u[0], k__cospi_p01_p31);

-  v[1] = _mm_madd_epi16(u[1], k__cospi_p01_p31);

-  v[2] = _mm_madd_epi16(u[0], k__cospi_p31_m01);

-  v[3] = _mm_madd_epi16(u[1], k__cospi_p31_m01);

-  v[4] = _mm_madd_epi16(u[2], k__cospi_p05_p27);

-  v[5] = _mm_madd_epi16(u[3], k__cospi_p05_p27);

-  v[6] = _mm_madd_epi16(u[2], k__cospi_p27_m05);

-  v[7] = _mm_madd_epi16(u[3], k__cospi_p27_m05);

-  v[8] = _mm_madd_epi16(u[4], k__cospi_p09_p23);

-  v[9] = _mm_madd_epi16(u[5], k__cospi_p09_p23);

-  v[10] = _mm_madd_epi16(u[4], k__cospi_p23_m09);

-  v[11] = _mm_madd_epi16(u[5], k__cospi_p23_m09);

-  v[12] = _mm_madd_epi16(u[6], k__cospi_p13_p19);

-  v[13] = _mm_madd_epi16(u[7], k__cospi_p13_p19);

-  v[14] = _mm_madd_epi16(u[6], k__cospi_p19_m13);

-  v[15] = _mm_madd_epi16(u[7], k__cospi_p19_m13);

-  v[16] = _mm_madd_epi16(u[8], k__cospi_p17_p15);

-  v[17] = _mm_madd_epi16(u[9], k__cospi_p17_p15);

-  v[18] = _mm_madd_epi16(u[8], k__cospi_p15_m17);

-  v[19] = _mm_madd_epi16(u[9], k__cospi_p15_m17);

-  v[20] = _mm_madd_epi16(u[10], k__cospi_p21_p11);

-  v[21] = _mm_madd_epi16(u[11], k__cospi_p21_p11);

-  v[22] = _mm_madd_epi16(u[10], k__cospi_p11_m21);

-  v[23] = _mm_madd_epi16(u[11], k__cospi_p11_m21);

-  v[24] = _mm_madd_epi16(u[12], k__cospi_p25_p07);

-  v[25] = _mm_madd_epi16(u[13], k__cospi_p25_p07);

-  v[26] = _mm_madd_epi16(u[12], k__cospi_p07_m25);

-  v[27] = _mm_madd_epi16(u[13], k__cospi_p07_m25);

-  v[28] = _mm_madd_epi16(u[14], k__cospi_p29_p03);

-  v[29] = _mm_madd_epi16(u[15], k__cospi_p29_p03);

-  v[30] = _mm_madd_epi16(u[14], k__cospi_p03_m29);

-  v[31] = _mm_madd_epi16(u[15], k__cospi_p03_m29);

-  u[0] = _mm_add_epi32(v[0], v[16]);

-  u[1] = _mm_add_epi32(v[1], v[17]);

-  u[2] = _mm_add_epi32(v[2], v[18]);

-  u[3] = _mm_add_epi32(v[3], v[19]);

-  u[4] = _mm_add_epi32(v[4], v[20]);

-  u[5] = _mm_add_epi32(v[5], v[21]);

-  u[6] = _mm_add_epi32(v[6], v[22]);

-  u[7] = _mm_add_epi32(v[7], v[23]);

-  u[8] = _mm_add_epi32(v[8], v[24]);

-  u[9] = _mm_add_epi32(v[9], v[25]);

-  u[10] = _mm_add_epi32(v[10], v[26]);

-  u[11] = _mm_add_epi32(v[11], v[27]);

-  u[12] = _mm_add_epi32(v[12], v[28]);

-  u[13] = _mm_add_epi32(v[13], v[29]);

-  u[14] = _mm_add_epi32(v[14], v[30]);

-  u[15] = _mm_add_epi32(v[15], v[31]);

-  u[16] = _mm_sub_epi32(v[0], v[16]);

-  u[17] = _mm_sub_epi32(v[1], v[17]);

-  u[18] = _mm_sub_epi32(v[2], v[18]);

-  u[19] = _mm_sub_epi32(v[3], v[19]);

-  u[20] = _mm_sub_epi32(v[4], v[20]);

-  u[21] = _mm_sub_epi32(v[5], v[21]);

-  u[22] = _mm_sub_epi32(v[6], v[22]);

-  u[23] = _mm_sub_epi32(v[7], v[23]);

-  u[24] = _mm_sub_epi32(v[8], v[24]);

-  u[25] = _mm_sub_epi32(v[9], v[25]);

-  u[26] = _mm_sub_epi32(v[10], v[26]);

-  u[27] = _mm_sub_epi32(v[11], v[27]);

-  u[28] = _mm_sub_epi32(v[12], v[28]);

-  u[29] = _mm_sub_epi32(v[13], v[29]);

-  u[30] = _mm_sub_epi32(v[14], v[30]);

-  u[31] = _mm_sub_epi32(v[15], v[31]);

-  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

-  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

-  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

-  v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

-  v[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);

-  v[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);

-  v[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);

-  v[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);

-  v[8] = _mm_add_epi32(u[8], k__DCT_CONST_ROUNDING);

-  v[9] = _mm_add_epi32(u[9], k__DCT_CONST_ROUNDING);

-  v[10] = _mm_add_epi32(u[10], k__DCT_CONST_ROUNDING);

-  v[11] = _mm_add_epi32(u[11], k__DCT_CONST_ROUNDING);

-  v[12] = _mm_add_epi32(u[12], k__DCT_CONST_ROUNDING);

-  v[13] = _mm_add_epi32(u[13], k__DCT_CONST_ROUNDING);

-  v[14] = _mm_add_epi32(u[14], k__DCT_CONST_ROUNDING);

-  v[15] = _mm_add_epi32(u[15], k__DCT_CONST_ROUNDING);

-  v[16] = _mm_add_epi32(u[16], k__DCT_CONST_ROUNDING);

-  v[17] = _mm_add_epi32(u[17], k__DCT_CONST_ROUNDING);

-  v[18] = _mm_add_epi32(u[18], k__DCT_CONST_ROUNDING);

-  v[19] = _mm_add_epi32(u[19], k__DCT_CONST_ROUNDING);

-  v[20] = _mm_add_epi32(u[20], k__DCT_CONST_ROUNDING);

-  v[21] = _mm_add_epi32(u[21], k__DCT_CONST_ROUNDING);

-  v[22] = _mm_add_epi32(u[22], k__DCT_CONST_ROUNDING);

-  v[23] = _mm_add_epi32(u[23], k__DCT_CONST_ROUNDING);

-  v[24] = _mm_add_epi32(u[24], k__DCT_CONST_ROUNDING);

-  v[25] = _mm_add_epi32(u[25], k__DCT_CONST_ROUNDING);

-  v[26] = _mm_add_epi32(u[26], k__DCT_CONST_ROUNDING);

-  v[27] = _mm_add_epi32(u[27], k__DCT_CONST_ROUNDING);

-  v[28] = _mm_add_epi32(u[28], k__DCT_CONST_ROUNDING);

-  v[29] = _mm_add_epi32(u[29], k__DCT_CONST_ROUNDING);

-  v[30] = _mm_add_epi32(u[30], k__DCT_CONST_ROUNDING);

-  v[31] = _mm_add_epi32(u[31], k__DCT_CONST_ROUNDING);

-  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

-  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

-  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

-  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);

-  u[4] = _mm_srai_epi32(v[4], DCT_CONST_BITS);

-  u[5] = _mm_srai_epi32(v[5], DCT_CONST_BITS);

-  u[6] = _mm_srai_epi32(v[6], DCT_CONST_BITS);

-  u[7] = _mm_srai_epi32(v[7], DCT_CONST_BITS);

-  u[8] = _mm_srai_epi32(v[8], DCT_CONST_BITS);

-  u[9] = _mm_srai_epi32(v[9], DCT_CONST_BITS);

-  u[10] = _mm_srai_epi32(v[10], DCT_CONST_BITS);

-  u[11] = _mm_srai_epi32(v[11], DCT_CONST_BITS);

-  u[12] = _mm_srai_epi32(v[12], DCT_CONST_BITS);

-  u[13] = _mm_srai_epi32(v[13], DCT_CONST_BITS);

-  u[14] = _mm_srai_epi32(v[14], DCT_CONST_BITS);

-  u[15] = _mm_srai_epi32(v[15], DCT_CONST_BITS);

-  u[16] = _mm_srai_epi32(v[16], DCT_CONST_BITS);

-  u[17] = _mm_srai_epi32(v[17], DCT_CONST_BITS);

-  u[18] = _mm_srai_epi32(v[18], DCT_CONST_BITS);

-  u[19] = _mm_srai_epi32(v[19], DCT_CONST_BITS);

-  u[20] = _mm_srai_epi32(v[20], DCT_CONST_BITS);

-  u[21] = _mm_srai_epi32(v[21], DCT_CONST_BITS);

-  u[22] = _mm_srai_epi32(v[22], DCT_CONST_BITS);

-  u[23] = _mm_srai_epi32(v[23], DCT_CONST_BITS);

-  u[24] = _mm_srai_epi32(v[24], DCT_CONST_BITS);

-  u[25] = _mm_srai_epi32(v[25], DCT_CONST_BITS);

-  u[26] = _mm_srai_epi32(v[26], DCT_CONST_BITS);

-  u[27] = _mm_srai_epi32(v[27], DCT_CONST_BITS);

-  u[28] = _mm_srai_epi32(v[28], DCT_CONST_BITS);

-  u[29] = _mm_srai_epi32(v[29], DCT_CONST_BITS);

-  u[30] = _mm_srai_epi32(v[30], DCT_CONST_BITS);

-  u[31] = _mm_srai_epi32(v[31], DCT_CONST_BITS);

-  s[0] = _mm_packs_epi32(u[0], u[1]);

-  s[1] = _mm_packs_epi32(u[2], u[3]);

-  s[2] = _mm_packs_epi32(u[4], u[5]);

-  s[3] = _mm_packs_epi32(u[6], u[7]);

-  s[4] = _mm_packs_epi32(u[8], u[9]);

-  s[5] = _mm_packs_epi32(u[10], u[11]);

-  s[6] = _mm_packs_epi32(u[12], u[13]);

-  s[7] = _mm_packs_epi32(u[14], u[15]);

-  s[8] = _mm_packs_epi32(u[16], u[17]);

-  s[9] = _mm_packs_epi32(u[18], u[19]);

-  s[10] = _mm_packs_epi32(u[20], u[21]);

-  s[11] = _mm_packs_epi32(u[22], u[23]);

-  s[12] = _mm_packs_epi32(u[24], u[25]);

-  s[13] = _mm_packs_epi32(u[26], u[27]);

-  s[14] = _mm_packs_epi32(u[28], u[29]);

-  s[15] = _mm_packs_epi32(u[30], u[31]);

-  // stage 2

-  u[0] = _mm_unpacklo_epi16(s[8], s[9]);

-  u[1] = _mm_unpackhi_epi16(s[8], s[9]);

-  u[2] = _mm_unpacklo_epi16(s[10], s[11]);

-  u[3] = _mm_unpackhi_epi16(s[10], s[11]);

-  u[4] = _mm_unpacklo_epi16(s[12], s[13]);

-  u[5] = _mm_unpackhi_epi16(s[12], s[13]);

-  u[6] = _mm_unpacklo_epi16(s[14], s[15]);

-  u[7] = _mm_unpackhi_epi16(s[14], s[15]);

-  v[0] = _mm_madd_epi16(u[0], k__cospi_p04_p28);

-  v[1] = _mm_madd_epi16(u[1], k__cospi_p04_p28);

-  v[2] = _mm_madd_epi16(u[0], k__cospi_p28_m04);

-  v[3] = _mm_madd_epi16(u[1], k__cospi_p28_m04);

-  v[4] = _mm_madd_epi16(u[2], k__cospi_p20_p12);

-  v[5] = _mm_madd_epi16(u[3], k__cospi_p20_p12);

-  v[6] = _mm_madd_epi16(u[2], k__cospi_p12_m20);

-  v[7] = _mm_madd_epi16(u[3], k__cospi_p12_m20);

-  v[8] = _mm_madd_epi16(u[4], k__cospi_m28_p04);

-  v[9] = _mm_madd_epi16(u[5], k__cospi_m28_p04);

-  v[10] = _mm_madd_epi16(u[4], k__cospi_p04_p28);

-  v[11] = _mm_madd_epi16(u[5], k__cospi_p04_p28);

-  v[12] = _mm_madd_epi16(u[6], k__cospi_m12_p20);

-  v[13] = _mm_madd_epi16(u[7], k__cospi_m12_p20);

-  v[14] = _mm_madd_epi16(u[6], k__cospi_p20_p12);

-  v[15] = _mm_madd_epi16(u[7], k__cospi_p20_p12);

-  u[0] = _mm_add_epi32(v[0], v[8]);

-  u[1] = _mm_add_epi32(v[1], v[9]);

-  u[2] = _mm_add_epi32(v[2], v[10]);

-  u[3] = _mm_add_epi32(v[3], v[11]);

-  u[4] = _mm_add_epi32(v[4], v[12]);

-  u[5] = _mm_add_epi32(v[5], v[13]);

-  u[6] = _mm_add_epi32(v[6], v[14]);

-  u[7] = _mm_add_epi32(v[7], v[15]);

-  u[8] = _mm_sub_epi32(v[0], v[8]);

-  u[9] = _mm_sub_epi32(v[1], v[9]);

-  u[10] = _mm_sub_epi32(v[2], v[10]);

-  u[11] = _mm_sub_epi32(v[3], v[11]);

-  u[12] = _mm_sub_epi32(v[4], v[12]);

-  u[13] = _mm_sub_epi32(v[5], v[13]);

-  u[14] = _mm_sub_epi32(v[6], v[14]);

-  u[15] = _mm_sub_epi32(v[7], v[15]);

-  v[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

-  v[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

-  v[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

-  v[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

-  v[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);

-  v[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);

-  v[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);

-  v[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);

-  v[8] = _mm_add_epi32(u[8], k__DCT_CONST_ROUNDING);

-  v[9] = _mm_add_epi32(u[9], k__DCT_CONST_ROUNDING);

-  v[10] = _mm_add_epi32(u[10], k__DCT_CONST_ROUNDING);

-  v[11] = _mm_add_epi32(u[11], k__DCT_CONST_ROUNDING);

-  v[12] = _mm_add_epi32(u[12], k__DCT_CONST_ROUNDING);

-  v[13] = _mm_add_epi32(u[13], k__DCT_CONST_ROUNDING);

-  v[14] = _mm_add_epi32(u[14], k__DCT_CONST_ROUNDING);

-  v[15] = _mm_add_epi32(u[15], k__DCT_CONST_ROUNDING);

-  u[0] = _mm_srai_epi32(v[0], DCT_CONST_BITS);

-  u[1] = _mm_srai_epi32(v[1], DCT_CONST_BITS);

-  u[2] = _mm_srai_epi32(v[2], DCT_CONST_BITS);

-  u[3] = _mm_srai_epi32(v[3], DCT_CONST_BITS);

-  u[4] = _mm_srai_epi32(v[4], DCT_CONST_BITS);

-  u[5] = _mm_srai_epi32(v[5], DCT_CONST_BITS);

-  u[6] = _mm_srai_epi32(v[6], DCT_CONST_BITS);

-  u[7] = _mm_srai_epi32(v[7], DCT_CONST_BITS);

-  u[8] = _mm_srai_epi32(v[8], DCT_CONST_BITS);

-  u[9] = _mm_srai_epi32(v[9], DCT_CONST_BITS);

-  u[10] = _mm_srai_epi32(v[10], DCT_CONST_BITS);

-  u[11] = _mm_srai_epi32(v[11], DCT_CONST_BITS);

-  u[12] = _mm_srai_epi32(v[12], DCT_CONST_BITS);

-  u[13] = _mm_srai_epi32(v[13], DCT_CONST_BITS);

-  u[14] = _mm_srai_epi32(v[14], DCT_CONST_BITS);

-  u[15] = _mm_srai_epi32(v[15], DCT_CONST_BITS);

-  x[0] = _mm_add_epi16(s[0], s[4]);

-  x[1] = _mm_add_epi16(s[1], s[5]);

-  x[2] = _mm_add_epi16(s[2], s[6]);

-  x[3] = _mm_add_epi16(s[3], s[7]);

-  x[4] = _mm_sub_epi16(s[0], s[4]);

-  x[5] = _mm_sub_epi16(s[1], s[5]);

-  x[6] = _mm_sub_epi16(s[2], s[6]);

-  x[7] = _mm_sub_epi16(s[3], s[7]);

-  x[8] = _mm_packs_epi32(u[0], u[1]);

-  x[9] = _mm_packs_epi32(u[2], u[3]);

-  x[10] = _mm_packs_epi32(u[4], u[5]);

-  x[11] = _mm_packs_epi32(u[6], u[7]);

-  x[12] = _mm_packs_epi32(u[8], u[9]);

-  x[13] = _mm_packs_epi32(u[10], u[11]);

-  x[14] = _mm_packs_epi32(u[12], u[13]);

-  x[15] = _mm_packs_epi32(u[14], u[15]);

-  // stage 3

-  u[0] = _mm_unpacklo_epi16(x[4], x[5]);

-  u[1] = _mm_unpackhi_epi16(x[4], x[5]);

-  u[2] = _mm_unpacklo_epi16(x[6], x[7]);

-  u[3] = _mm_unpackhi_epi16(x[6], x[7]);

-  u[4] = _mm_unpacklo_epi16(x[12], x[13]);

-  u[5] = _mm_unpackhi_epi16(x[12], x[13]);

-  u[6] = _mm_unpacklo_epi16(x[14], x[15]);

-  u[7] = _mm_unpackhi_epi16(x[14], x[15]);

-  v[0] = _mm_madd_epi16(u[0], k__cospi_p08_p24);

-  v[1] = _mm_madd_epi16(u[1], k__cospi_p08_p24);

-  v[2] = _mm_madd_epi16(u[0], k__cospi_p24_m08);

-  v[3] = _mm_madd_epi16(u[1], k__cospi_p24_m08);

-  v[4] = _mm_madd_epi16(u[2], k__cospi_m24_p08);

-  v[5] = _mm_madd_epi16(u[3], k__cospi_m24_p08);

-  v[6] = _mm_madd_epi16(u[2], k__cospi_p08_p24);

-  v[7] = _mm_madd_epi16(u[3], k__cospi_p08_p24);

-  v[8] = _mm_madd_epi16(u[4], k__cospi_p08_p24);

-  v[9] = _mm_madd_epi16(u[5], k__cospi_p08_p24);

-  v[10] = _mm_madd_epi16(u[4], k__cospi_p24_m08);

-  v[11] = _mm_madd_epi16(u[5], k__cospi_p24_m08);

-  v[12] = _mm_madd_epi16(u[6], k__cospi_m24_p08);

-  v[13] = _mm_madd_epi16(u[7], k__cospi_m24_p08);

-  v[14] = _mm_madd_epi16(u[6], k__cospi_p08_p24);

-  v[15] = _mm_madd_epi16(u[7], k__cospi_p08_p24);

-  u[0] = _mm_add_epi32(v[0], v[4]);

-  u[1] = _mm_add_epi32(v[1], v[5]);

-  u[2] = _mm_add_epi32(v[2], v[6]);

-  u[3] = _mm_add_epi32(v[3], v[7]);

-  u[4] = _mm_sub_epi32(v[0], v[4]);

-  u[5] = _mm_sub_epi32(v[1], v[5]);

-  u[6] = _mm_sub_epi32(v[2], v[6]);

-  u[7] = _mm_sub_epi32(v[3], v[7]);

-  u[8] = _mm_add_epi32(v[8], v[12]);

-  u[9] = _mm_add_epi32(v[9], v[13]);

-  u[10] = _mm_add_epi32(v[10], v[14]);

-  u[11] = _mm_add_epi32(v[11], v[15]);

-  u[12] = _mm_sub_epi32(v[8], v[12]);

-  u[13] = _mm_sub_epi32(v[9], v[13]);

-  u[14] = _mm_sub_epi32(v[10], v[14]);

-  u[15] = _mm_sub_epi32(v[11], v[15]);

-  u[0] = _mm_add_epi32(u[0], k__DCT_CONST_ROUNDING);

-  u[1] = _mm_add_epi32(u[1], k__DCT_CONST_ROUNDING);

-  u[2] = _mm_add_epi32(u[2], k__DCT_CONST_ROUNDING);

-  u[3] = _mm_add_epi32(u[3], k__DCT_CONST_ROUNDING);

-  u[4] = _mm_add_epi32(u[4], k__DCT_CONST_ROUNDING);

-  u[5] = _mm_add_epi32(u[5], k__DCT_CONST_ROUNDING);

-  u[6] = _mm_add_epi32(u[6], k__DCT_CONST_ROUNDING);

-  u[7] = _mm_add_epi32(u[7], k__DCT_CONST_ROUNDING);

-  u[8] = _mm_add_epi32(u[8], k__DCT_CONST_ROUNDING);

-  u[9] = _mm_add_epi32(u[9], k__DCT_CONST_ROUNDING);

-  u[10] = _mm_add_epi32(u[10], k__DCT_CONST_ROUNDING);

-  u[11] = _mm_add_epi32(u[11], k__DCT_CONST_ROUNDING);

-  u[12] = _mm_add_epi32(u[12], k__DCT_CONST_ROUNDING);

-  u[13] = _mm_add_epi32(u[13], k__DCT_CONST_ROUNDING);

-  u[14] = _mm_add_epi32(u[14], k__DCT_CONST_ROUNDING);

-  u[15] = _mm_add_epi32(u[15], k__DCT_CONST_ROUNDING);

-  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

-  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

-  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

-  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

-  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

-  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

-  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

-  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

-  v[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);

-  v[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);

-  v[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);

-  v[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);

-  v[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);

-  v[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);

-  v[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);

-  v[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);

-  s[0] = _mm_add_epi16(x[0], x[2]);

-  s[1] = _mm_add_epi16(x[1], x[3]);

-  s[2] = _mm_sub_epi16(x[0], x[2]);

-  s[3] = _mm_sub_epi16(x[1], x[3]);

-  s[4] = _mm_packs_epi32(v[0], v[1]);

-  s[5] = _mm_packs_epi32(v[2], v[3]);

-  s[6] = _mm_packs_epi32(v[4], v[5]);

-  s[7] = _mm_packs_epi32(v[6], v[7]);

-  s[8] = _mm_add_epi16(x[8], x[10]);

-  s[9] = _mm_add_epi16(x[9], x[11]);

-  s[10] = _mm_sub_epi16(x[8], x[10]);

-  s[11] = _mm_sub_epi16(x[9], x[11]);

-  s[12] = _mm_packs_epi32(v[8], v[9]);

-  s[13] = _mm_packs_epi32(v[10], v[11]);

-  s[14] = _mm_packs_epi32(v[12], v[13]);

-  s[15] = _mm_packs_epi32(v[14], v[15]);

-  // stage 4

-  u[0] = _mm_unpacklo_epi16(s[2], s[3]);

-  u[1] = _mm_unpackhi_epi16(s[2], s[3]);

-  u[2] = _mm_unpacklo_epi16(s[6], s[7]);

-  u[3] = _mm_unpackhi_epi16(s[6], s[7]);

-  u[4] = _mm_unpacklo_epi16(s[10], s[11]);

-  u[5] = _mm_unpackhi_epi16(s[10], s[11]);

-  u[6] = _mm_unpacklo_epi16(s[14], s[15]);

-  u[7] = _mm_unpackhi_epi16(s[14], s[15]);

-  v[0] = _mm_madd_epi16(u[0], k__cospi_m16_m16);

-  v[1] = _mm_madd_epi16(u[1], k__cospi_m16_m16);

-  v[2] = _mm_madd_epi16(u[0], k__cospi_p16_m16);

-  v[3] = _mm_madd_epi16(u[1], k__cospi_p16_m16);

-  v[4] = _mm_madd_epi16(u[2], k__cospi_p16_p16);

-  v[5] = _mm_madd_epi16(u[3], k__cospi_p16_p16);

-  v[6] = _mm_madd_epi16(u[2], k__cospi_m16_p16);

-  v[7] = _mm_madd_epi16(u[3], k__cospi_m16_p16);

-  v[8] = _mm_madd_epi16(u[4], k__cospi_p16_p16);

-  v[9] = _mm_madd_epi16(u[5], k__cospi_p16_p16);

-  v[10] = _mm_madd_epi16(u[4], k__cospi_m16_p16);

-  v[11] = _mm_madd_epi16(u[5], k__cospi_m16_p16);

-  v[12] = _mm_madd_epi16(u[6], k__cospi_m16_m16);

-  v[13] = _mm_madd_epi16(u[7], k__cospi_m16_m16);

-  v[14] = _mm_madd_epi16(u[6], k__cospi_p16_m16);

-  v[15] = _mm_madd_epi16(u[7], k__cospi_p16_m16);

-  u[0] = _mm_add_epi32(v[0], k__DCT_CONST_ROUNDING);

-  u[1] = _mm_add_epi32(v[1], k__DCT_CONST_ROUNDING);

-  u[2] = _mm_add_epi32(v[2], k__DCT_CONST_ROUNDING);

-  u[3] = _mm_add_epi32(v[3], k__DCT_CONST_ROUNDING);

-  u[4] = _mm_add_epi32(v[4], k__DCT_CONST_ROUNDING);

-  u[5] = _mm_add_epi32(v[5], k__DCT_CONST_ROUNDING);

-  u[6] = _mm_add_epi32(v[6], k__DCT_CONST_ROUNDING);

-  u[7] = _mm_add_epi32(v[7], k__DCT_CONST_ROUNDING);

-  u[8] = _mm_add_epi32(v[8], k__DCT_CONST_ROUNDING);

-  u[9] = _mm_add_epi32(v[9], k__DCT_CONST_ROUNDING);

-  u[10] = _mm_add_epi32(v[10], k__DCT_CONST_ROUNDING);

-  u[11] = _mm_add_epi32(v[11], k__DCT_CONST_ROUNDING);

-  u[12] = _mm_add_epi32(v[12], k__DCT_CONST_ROUNDING);

-  u[13] = _mm_add_epi32(v[13], k__DCT_CONST_ROUNDING);

-  u[14] = _mm_add_epi32(v[14], k__DCT_CONST_ROUNDING);

-  u[15] = _mm_add_epi32(v[15], k__DCT_CONST_ROUNDING);

-  v[0] = _mm_srai_epi32(u[0], DCT_CONST_BITS);

-  v[1] = _mm_srai_epi32(u[1], DCT_CONST_BITS);

-  v[2] = _mm_srai_epi32(u[2], DCT_CONST_BITS);

-  v[3] = _mm_srai_epi32(u[3], DCT_CONST_BITS);

-  v[4] = _mm_srai_epi32(u[4], DCT_CONST_BITS);

-  v[5] = _mm_srai_epi32(u[5], DCT_CONST_BITS);

-  v[6] = _mm_srai_epi32(u[6], DCT_CONST_BITS);

-  v[7] = _mm_srai_epi32(u[7], DCT_CONST_BITS);

-  v[8] = _mm_srai_epi32(u[8], DCT_CONST_BITS);

-  v[9] = _mm_srai_epi32(u[9], DCT_CONST_BITS);

-  v[10] = _mm_srai_epi32(u[10], DCT_CONST_BITS);

-  v[11] = _mm_srai_epi32(u[11], DCT_CONST_BITS);

-  v[12] = _mm_srai_epi32(u[12], DCT_CONST_BITS);

-  v[13] = _mm_srai_epi32(u[13], DCT_CONST_BITS);

-  v[14] = _mm_srai_epi32(u[14], DCT_CONST_BITS);

-  v[15] = _mm_srai_epi32(u[15], DCT_CONST_BITS);

-  in[0] = s[0];

-  in[1] = _mm_sub_epi16(kZero, s[8]);

-  in[2] = s[12];

-  in[3] = _mm_sub_epi16(kZero, s[4]);

-  in[4] = _mm_packs_epi32(v[4], v[5]);

-  in[5] = _mm_packs_epi32(v[12], v[13]);

-  in[6] = _mm_packs_epi32(v[8], v[9]);

-  in[7] = _mm_packs_epi32(v[0], v[1]);

-  in[8] = _mm_packs_epi32(v[2], v[3]);

-  in[9] = _mm_packs_epi32(v[10], v[11]);

-  in[10] = _mm_packs_epi32(v[14], v[15]);

-  in[11] = _mm_packs_epi32(v[6], v[7]);

-  in[12] = s[5];

-  in[13] = _mm_sub_epi16(kZero, s[13]);

-  in[14] = s[9];

-  in[15] = _mm_sub_epi16(kZero, s[1]);

-}

-static void fdct16_sse2(__m128i *in0, __m128i *in1) {

-  fdct16_8col(in0);

-  fdct16_8col(in1);

-  array_transpose_16x16(in0, in1);

-}

-static void fadst16_sse2(__m128i *in0, __m128i *in1) {

-  fadst16_8col(in0);

-  fadst16_8col(in1);

-  array_transpose_16x16(in0, in1);

-}

-void vp9_fht16x16_sse2(const int16_t *input, tran_low_t *output,

-                       int stride, int tx_type) {

-  __m128i in0[16], in1[16];

-  switch (tx_type) {

-    case DCT_DCT:

-      vpx_fdct16x16_sse2(input, output, stride);

-      break;

-    case ADST_DCT:

-      load_buffer_16x16(input, in0, in1, stride);

-      fadst16_sse2(in0, in1);

-      right_shift_16x16(in0, in1);

-      fdct16_sse2(in0, in1);

-      write_buffer_16x16(output, in0, in1, 16);

-      break;

-    case DCT_ADST:

-      load_buffer_16x16(input, in0, in1, stride);

-      fdct16_sse2(in0, in1);

-      right_shift_16x16(in0, in1);

-      fadst16_sse2(in0, in1);

-      write_buffer_16x16(output, in0, in1, 16);

-      break;

-    case ADST_ADST:

-      load_buffer_16x16(input, in0, in1, stride);

-      fadst16_sse2(in0, in1);

-      right_shift_16x16(in0, in1);

-      fadst16_sse2(in0, in1);

-      write_buffer_16x16(output, in0, in1, 16);

-      break;

-    default:

-      assert(0);

-      break;

-  }

-}

--- a/vp9/vp9cx.mk

+++ b/vp9/vp9cx.mk

@@ -101,7 +101,7 @@

 endif

 ifeq ($(CONFIG_USE_X86INC),yes)

-VP9_CX_SRCS-$(HAVE_MMX) += encoder/x86/vp9_dct_mmx.asm

+VP9_CX_SRCS-$(HAVE_SSE2) += encoder/x86/vp9_dct_sse2.asm

 ifeq ($(CONFIG_VP9_HIGHBITDEPTH),yes)

 VP9_CX_SRCS-$(HAVE_SSE2) += encoder/x86/vp9_highbd_error_sse2.asm

 VP9_CX_SRCS-$(HAVE_AVX) += encoder/x86/vp9_highbd_error_avx.asm

@@ -116,7 +116,7 @@

 endif

 endif

-VP9_CX_SRCS-$(HAVE_SSE2) += encoder/x86/vp9_dct_sse2.c

+VP9_CX_SRCS-$(HAVE_SSE2) += encoder/x86/vp9_dct_intrin_sse2.c

 VP9_CX_SRCS-$(HAVE_SSSE3) += encoder/x86/vp9_dct_ssse3.c

 ifneq ($(CONFIG_VP9_HIGHBITDEPTH),yes)

 VP9_CX_SRCS-$(HAVE_SSSE3) += encoder/x86/vp9_frame_scale_ssse3.c