ref: e3ee8c292b8abb9de718af76f19d5cd40f5c9655
dir: /vp9/common/x86/vp9_idct_intrin_sse2.h/
/*
* 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.
*/
#include <assert.h>
#include <emmintrin.h> // SSE2
#include "./vpx_config.h"
#include "vpx/vpx_integer.h"
#include "vp9/common/vp9_common.h"
#include "vp9/common/vp9_idct.h"
// perform 8x8 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]);
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);
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);
}
#define TRANSPOSE_8X4(in0, in1, in2, in3, out0, out1) \
{ \
const __m128i tr0_0 = _mm_unpacklo_epi16(in0, in1); \
const __m128i tr0_1 = _mm_unpacklo_epi16(in2, in3); \
\
in0 = _mm_unpacklo_epi32(tr0_0, tr0_1); /* i1 i0 */ \
in1 = _mm_unpackhi_epi32(tr0_0, tr0_1); /* i3 i2 */ \
}
static INLINE void array_transpose_4X8(__m128i *in, __m128i * out) {
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_4 = _mm_unpacklo_epi16(in[4], in[5]);
const __m128i tr0_5 = _mm_unpacklo_epi16(in[6], in[7]);
const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1);
const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1);
const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_4, tr0_5);
const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_4, tr0_5);
out[0] = _mm_unpacklo_epi64(tr1_0, tr1_4);
out[1] = _mm_unpackhi_epi64(tr1_0, tr1_4);
out[2] = _mm_unpacklo_epi64(tr1_2, tr1_6);
out[3] = _mm_unpackhi_epi64(tr1_2, tr1_6);
}
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 load_buffer_8x16(const int16_t *input, __m128i *in) {
in[0] = _mm_load_si128((const __m128i *)(input + 0 * 16));
in[1] = _mm_load_si128((const __m128i *)(input + 1 * 16));
in[2] = _mm_load_si128((const __m128i *)(input + 2 * 16));
in[3] = _mm_load_si128((const __m128i *)(input + 3 * 16));
in[4] = _mm_load_si128((const __m128i *)(input + 4 * 16));
in[5] = _mm_load_si128((const __m128i *)(input + 5 * 16));
in[6] = _mm_load_si128((const __m128i *)(input + 6 * 16));
in[7] = _mm_load_si128((const __m128i *)(input + 7 * 16));
in[8] = _mm_load_si128((const __m128i *)(input + 8 * 16));
in[9] = _mm_load_si128((const __m128i *)(input + 9 * 16));
in[10] = _mm_load_si128((const __m128i *)(input + 10 * 16));
in[11] = _mm_load_si128((const __m128i *)(input + 11 * 16));
in[12] = _mm_load_si128((const __m128i *)(input + 12 * 16));
in[13] = _mm_load_si128((const __m128i *)(input + 13 * 16));
in[14] = _mm_load_si128((const __m128i *)(input + 14 * 16));
in[15] = _mm_load_si128((const __m128i *)(input + 15 * 16));
}
#define RECON_AND_STORE(dest, in_x) \
{ \
__m128i d0 = _mm_loadl_epi64((__m128i *)(dest)); \
d0 = _mm_unpacklo_epi8(d0, zero); \
d0 = _mm_add_epi16(in_x, d0); \
d0 = _mm_packus_epi16(d0, d0); \
_mm_storel_epi64((__m128i *)(dest), d0); \
}
static INLINE void write_buffer_8x16(uint8_t *dest, __m128i *in, int stride) {
const __m128i final_rounding = _mm_set1_epi16(1<<5);
const __m128i zero = _mm_setzero_si128();
// Final rounding and shift
in[0] = _mm_adds_epi16(in[0], final_rounding);
in[1] = _mm_adds_epi16(in[1], final_rounding);
in[2] = _mm_adds_epi16(in[2], final_rounding);
in[3] = _mm_adds_epi16(in[3], final_rounding);
in[4] = _mm_adds_epi16(in[4], final_rounding);
in[5] = _mm_adds_epi16(in[5], final_rounding);
in[6] = _mm_adds_epi16(in[6], final_rounding);
in[7] = _mm_adds_epi16(in[7], final_rounding);
in[8] = _mm_adds_epi16(in[8], final_rounding);
in[9] = _mm_adds_epi16(in[9], final_rounding);
in[10] = _mm_adds_epi16(in[10], final_rounding);
in[11] = _mm_adds_epi16(in[11], final_rounding);
in[12] = _mm_adds_epi16(in[12], final_rounding);
in[13] = _mm_adds_epi16(in[13], final_rounding);
in[14] = _mm_adds_epi16(in[14], final_rounding);
in[15] = _mm_adds_epi16(in[15], final_rounding);
in[0] = _mm_srai_epi16(in[0], 6);
in[1] = _mm_srai_epi16(in[1], 6);
in[2] = _mm_srai_epi16(in[2], 6);
in[3] = _mm_srai_epi16(in[3], 6);
in[4] = _mm_srai_epi16(in[4], 6);
in[5] = _mm_srai_epi16(in[5], 6);
in[6] = _mm_srai_epi16(in[6], 6);
in[7] = _mm_srai_epi16(in[7], 6);
in[8] = _mm_srai_epi16(in[8], 6);
in[9] = _mm_srai_epi16(in[9], 6);
in[10] = _mm_srai_epi16(in[10], 6);
in[11] = _mm_srai_epi16(in[11], 6);
in[12] = _mm_srai_epi16(in[12], 6);
in[13] = _mm_srai_epi16(in[13], 6);
in[14] = _mm_srai_epi16(in[14], 6);
in[15] = _mm_srai_epi16(in[15], 6);
RECON_AND_STORE(dest + 0 * stride, in[0]);
RECON_AND_STORE(dest + 1 * stride, in[1]);
RECON_AND_STORE(dest + 2 * stride, in[2]);
RECON_AND_STORE(dest + 3 * stride, in[3]);
RECON_AND_STORE(dest + 4 * stride, in[4]);
RECON_AND_STORE(dest + 5 * stride, in[5]);
RECON_AND_STORE(dest + 6 * stride, in[6]);
RECON_AND_STORE(dest + 7 * stride, in[7]);
RECON_AND_STORE(dest + 8 * stride, in[8]);
RECON_AND_STORE(dest + 9 * stride, in[9]);
RECON_AND_STORE(dest + 10 * stride, in[10]);
RECON_AND_STORE(dest + 11 * stride, in[11]);
RECON_AND_STORE(dest + 12 * stride, in[12]);
RECON_AND_STORE(dest + 13 * stride, in[13]);
RECON_AND_STORE(dest + 14 * stride, in[14]);
RECON_AND_STORE(dest + 15 * stride, in[15]);
}