ref: 0412193bb9775f6be0f9f6c74b90ff705e584d92
dir: /vpx_dsp/arm/idct32x32_135_add_neon.c/
/*
* 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.
*/
#include <arm_neon.h>
#include "./vpx_config.h"
#include "./vpx_dsp_rtcd.h"
#include "vpx_dsp/arm/idct_neon.h"
#include "vpx_dsp/arm/transpose_neon.h"
#include "vpx_dsp/txfm_common.h"
// Only for the first pass of the _135_ variant. Since it only uses values from
// the top left 16x16 it can safely assume all the remaining values are 0 and
// skip an awful lot of calculations. In fact, only the first 12 columns make
// the cut. None of the elements in the 13th, 14th, 15th or 16th columns are
// used so it skips any calls to input[12|13|14|15] too.
// In C this does a single row of 32 for each call. Here it transposes the top
// left 12x8 to allow using SIMD.
// vp9/common/vp9_scan.c:vp9_default_iscan_32x32 arranges the first 135 non-zero
// coefficients as follows:
// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
// 0 0 2 5 10 17 25 38 47 62 83 101 121
// 1 1 4 8 15 22 30 45 58 74 92 112 133
// 2 3 7 12 18 28 36 52 64 82 102 118
// 3 6 11 16 23 31 43 60 73 90 109 126
// 4 9 14 19 29 37 50 65 78 98 116 134
// 5 13 20 26 35 44 54 72 85 105 123
// 6 21 27 33 42 53 63 80 94 113 132
// 7 24 32 39 48 57 71 88 104 120
// 8 34 40 46 56 68 81 96 111 130
// 9 41 49 55 67 77 91 107 124
// 10 51 59 66 76 89 99 119 131
// 11 61 69 75 87 100 114 129
// 12 70 79 86 97 108 122
// 13 84 93 103 110 125
// 14 98 106 115 127
// 15 117 128
static void idct32_12_neon(const int16_t *input, int16_t *output) {
int16x8_t in0, in1, in2, in3, in4, in5, in6, in7;
int16x4_t tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
int16x8_t in8, in9, in10, in11;
int16x8_t s1_16, s1_18, s1_19, s1_20, s1_21, s1_23, s1_24, s1_26, s1_27,
s1_28, s1_29, s1_31;
int16x8_t s2_8, s2_10, s2_11, s2_12, s2_13, s2_15, s2_18, s2_19, s2_20, s2_21,
s2_26, s2_27, s2_28, s2_29;
int16x8_t s3_4, s3_7, s3_10, s3_11, s3_12, s3_13, s3_17, s3_18, s3_21, s3_22,
s3_25, s3_26, s3_29, s3_30;
int16x8_t s4_0, s4_2, s4_3, s4_9, s4_10, s4_13, s4_14, s4_16, s4_17, s4_18,
s4_19, s4_20, s4_21, s4_22, s4_23, s4_24, s4_25, s4_26, s4_27, s4_28,
s4_29, s4_30, s4_31;
int16x8_t s5_0, s5_1, s5_2, s5_3, s5_5, s5_6, s5_8, s5_9, s5_10, s5_11, s5_12,
s5_13, s5_14, s5_15, s5_18, s5_19, s5_20, s5_21, s5_26, s5_27, s5_28,
s5_29;
int16x8_t s6_0, s6_1, s6_2, s6_3, s6_4, s6_5, s6_6, s6_7, s6_10, s6_11, s6_12,
s6_13, s6_16, s6_17, s6_18, s6_19, s6_20, s6_21, s6_22, s6_23, s6_24,
s6_25, s6_26, s6_27, s6_28, s6_29, s6_30, s6_31;
int16x8_t s7_0, s7_1, s7_2, s7_3, s7_4, s7_5, s7_6, s7_7, s7_8, s7_9, s7_10,
s7_11, s7_12, s7_13, s7_14, s7_15, s7_20, s7_21, s7_22, s7_23, s7_24,
s7_25, s7_26, s7_27;
load_and_transpose_s16_8x8(input, 32, &in0, &in1, &in2, &in3, &in4, &in5,
&in6, &in7);
input += 8;
tmp0 = vld1_s16(input);
input += 32;
tmp1 = vld1_s16(input);
input += 32;
tmp2 = vld1_s16(input);
input += 32;
tmp3 = vld1_s16(input);
input += 32;
tmp4 = vld1_s16(input);
input += 32;
tmp5 = vld1_s16(input);
input += 32;
tmp6 = vld1_s16(input);
input += 32;
tmp7 = vld1_s16(input);
transpose_s16_4x8(tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7, &in8, &in9,
&in10, &in11);
// stage 1
s1_16 = multiply_shift_and_narrow_s16(in1, cospi_31_64);
s1_31 = multiply_shift_and_narrow_s16(in1, cospi_1_64);
s1_18 = multiply_shift_and_narrow_s16(in9, cospi_23_64);
s1_29 = multiply_shift_and_narrow_s16(in9, cospi_9_64);
s1_19 = multiply_shift_and_narrow_s16(in7, -cospi_25_64);
s1_28 = multiply_shift_and_narrow_s16(in7, cospi_7_64);
s1_20 = multiply_shift_and_narrow_s16(in5, cospi_27_64);
s1_27 = multiply_shift_and_narrow_s16(in5, cospi_5_64);
s1_21 = multiply_shift_and_narrow_s16(in11, -cospi_21_64);
s1_26 = multiply_shift_and_narrow_s16(in11, cospi_11_64);
s1_23 = multiply_shift_and_narrow_s16(in3, -cospi_29_64);
s1_24 = multiply_shift_and_narrow_s16(in3, cospi_3_64);
// stage 2
s2_8 = multiply_shift_and_narrow_s16(in2, cospi_30_64);
s2_15 = multiply_shift_and_narrow_s16(in2, cospi_2_64);
s2_10 = multiply_shift_and_narrow_s16(in10, cospi_22_64);
s2_13 = multiply_shift_and_narrow_s16(in10, cospi_10_64);
s2_11 = multiply_shift_and_narrow_s16(in6, -cospi_26_64);
s2_12 = multiply_shift_and_narrow_s16(in6, cospi_6_64);
s2_18 = vsubq_s16(s1_19, s1_18);
s2_19 = vaddq_s16(s1_18, s1_19);
s2_20 = vaddq_s16(s1_20, s1_21);
s2_21 = vsubq_s16(s1_20, s1_21);
s2_26 = vsubq_s16(s1_27, s1_26);
s2_27 = vaddq_s16(s1_26, s1_27);
s2_28 = vaddq_s16(s1_28, s1_29);
s2_29 = vsubq_s16(s1_28, s1_29);
// stage 3
s3_4 = multiply_shift_and_narrow_s16(in4, cospi_28_64);
s3_7 = multiply_shift_and_narrow_s16(in4, cospi_4_64);
s3_10 = vsubq_s16(s2_11, s2_10);
s3_11 = vaddq_s16(s2_10, s2_11);
s3_12 = vaddq_s16(s2_12, s2_13);
s3_13 = vsubq_s16(s2_12, s2_13);
s3_17 = multiply_accumulate_shift_and_narrow_s16(s1_16, -cospi_4_64, s1_31,
cospi_28_64);
s3_30 = multiply_accumulate_shift_and_narrow_s16(s1_16, cospi_28_64, s1_31,
cospi_4_64);
s3_18 = multiply_accumulate_shift_and_narrow_s16(s2_18, -cospi_28_64, s2_29,
-cospi_4_64);
s3_29 = multiply_accumulate_shift_and_narrow_s16(s2_18, -cospi_4_64, s2_29,
cospi_28_64);
s3_21 = multiply_accumulate_shift_and_narrow_s16(s2_21, -cospi_20_64, s2_26,
cospi_12_64);
s3_26 = multiply_accumulate_shift_and_narrow_s16(s2_21, cospi_12_64, s2_26,
cospi_20_64);
s3_22 = multiply_accumulate_shift_and_narrow_s16(s1_23, -cospi_12_64, s1_24,
-cospi_20_64);
s3_25 = multiply_accumulate_shift_and_narrow_s16(s1_23, -cospi_20_64, s1_24,
cospi_12_64);
// stage 4
s4_0 = multiply_shift_and_narrow_s16(in0, cospi_16_64);
s4_2 = multiply_shift_and_narrow_s16(in8, cospi_24_64);
s4_3 = multiply_shift_and_narrow_s16(in8, cospi_8_64);
s4_9 = multiply_accumulate_shift_and_narrow_s16(s2_8, -cospi_8_64, s2_15,
cospi_24_64);
s4_14 = multiply_accumulate_shift_and_narrow_s16(s2_8, cospi_24_64, s2_15,
cospi_8_64);
s4_10 = multiply_accumulate_shift_and_narrow_s16(s3_10, -cospi_24_64, s3_13,
-cospi_8_64);
s4_13 = multiply_accumulate_shift_and_narrow_s16(s3_10, -cospi_8_64, s3_13,
cospi_24_64);
s4_16 = vaddq_s16(s1_16, s2_19);
s4_17 = vaddq_s16(s3_17, s3_18);
s4_18 = vsubq_s16(s3_17, s3_18);
s4_19 = vsubq_s16(s1_16, s2_19);
s4_20 = vsubq_s16(s1_23, s2_20);
s4_21 = vsubq_s16(s3_22, s3_21);
s4_22 = vaddq_s16(s3_21, s3_22);
s4_23 = vaddq_s16(s2_20, s1_23);
s4_24 = vaddq_s16(s1_24, s2_27);
s4_25 = vaddq_s16(s3_25, s3_26);
s4_26 = vsubq_s16(s3_25, s3_26);
s4_27 = vsubq_s16(s1_24, s2_27);
s4_28 = vsubq_s16(s1_31, s2_28);
s4_29 = vsubq_s16(s3_30, s3_29);
s4_30 = vaddq_s16(s3_29, s3_30);
s4_31 = vaddq_s16(s2_28, s1_31);
// stage 5
s5_0 = vaddq_s16(s4_0, s4_3);
s5_1 = vaddq_s16(s4_0, s4_2);
s5_2 = vsubq_s16(s4_0, s4_2);
s5_3 = vsubq_s16(s4_0, s4_3);
s5_5 = sub_multiply_shift_and_narrow_s16(s3_7, s3_4, cospi_16_64);
s5_6 = add_multiply_shift_and_narrow_s16(s3_4, s3_7, cospi_16_64);
s5_8 = vaddq_s16(s2_8, s3_11);
s5_9 = vaddq_s16(s4_9, s4_10);
s5_10 = vsubq_s16(s4_9, s4_10);
s5_11 = vsubq_s16(s2_8, s3_11);
s5_12 = vsubq_s16(s2_15, s3_12);
s5_13 = vsubq_s16(s4_14, s4_13);
s5_14 = vaddq_s16(s4_13, s4_14);
s5_15 = vaddq_s16(s2_15, s3_12);
s5_18 = multiply_accumulate_shift_and_narrow_s16(s4_18, -cospi_8_64, s4_29,
cospi_24_64);
s5_29 = multiply_accumulate_shift_and_narrow_s16(s4_18, cospi_24_64, s4_29,
cospi_8_64);
s5_19 = multiply_accumulate_shift_and_narrow_s16(s4_19, -cospi_8_64, s4_28,
cospi_24_64);
s5_28 = multiply_accumulate_shift_and_narrow_s16(s4_19, cospi_24_64, s4_28,
cospi_8_64);
s5_20 = multiply_accumulate_shift_and_narrow_s16(s4_20, -cospi_24_64, s4_27,
-cospi_8_64);
s5_27 = multiply_accumulate_shift_and_narrow_s16(s4_20, -cospi_8_64, s4_27,
cospi_24_64);
s5_21 = multiply_accumulate_shift_and_narrow_s16(s4_21, -cospi_24_64, s4_26,
-cospi_8_64);
s5_26 = multiply_accumulate_shift_and_narrow_s16(s4_21, -cospi_8_64, s4_26,
cospi_24_64);
// stage 6
s6_0 = vaddq_s16(s5_0, s3_7);
s6_1 = vaddq_s16(s5_1, s5_6);
s6_2 = vaddq_s16(s5_2, s5_5);
s6_3 = vaddq_s16(s5_3, s3_4);
s6_4 = vsubq_s16(s5_3, s3_4);
s6_5 = vsubq_s16(s5_2, s5_5);
s6_6 = vsubq_s16(s5_1, s5_6);
s6_7 = vsubq_s16(s5_0, s3_7);
s6_10 = sub_multiply_shift_and_narrow_s16(s5_13, s5_10, cospi_16_64);
s6_13 = add_multiply_shift_and_narrow_s16(s5_10, s5_13, cospi_16_64);
s6_11 = sub_multiply_shift_and_narrow_s16(s5_12, s5_11, cospi_16_64);
s6_12 = add_multiply_shift_and_narrow_s16(s5_11, s5_12, cospi_16_64);
s6_16 = vaddq_s16(s4_16, s4_23);
s6_17 = vaddq_s16(s4_17, s4_22);
s6_18 = vaddq_s16(s5_18, s5_21);
s6_19 = vaddq_s16(s5_19, s5_20);
s6_20 = vsubq_s16(s5_19, s5_20);
s6_21 = vsubq_s16(s5_18, s5_21);
s6_22 = vsubq_s16(s4_17, s4_22);
s6_23 = vsubq_s16(s4_16, s4_23);
s6_24 = vsubq_s16(s4_31, s4_24);
s6_25 = vsubq_s16(s4_30, s4_25);
s6_26 = vsubq_s16(s5_29, s5_26);
s6_27 = vsubq_s16(s5_28, s5_27);
s6_28 = vaddq_s16(s5_27, s5_28);
s6_29 = vaddq_s16(s5_26, s5_29);
s6_30 = vaddq_s16(s4_25, s4_30);
s6_31 = vaddq_s16(s4_24, s4_31);
// stage 7
s7_0 = vaddq_s16(s6_0, s5_15);
s7_1 = vaddq_s16(s6_1, s5_14);
s7_2 = vaddq_s16(s6_2, s6_13);
s7_3 = vaddq_s16(s6_3, s6_12);
s7_4 = vaddq_s16(s6_4, s6_11);
s7_5 = vaddq_s16(s6_5, s6_10);
s7_6 = vaddq_s16(s6_6, s5_9);
s7_7 = vaddq_s16(s6_7, s5_8);
s7_8 = vsubq_s16(s6_7, s5_8);
s7_9 = vsubq_s16(s6_6, s5_9);
s7_10 = vsubq_s16(s6_5, s6_10);
s7_11 = vsubq_s16(s6_4, s6_11);
s7_12 = vsubq_s16(s6_3, s6_12);
s7_13 = vsubq_s16(s6_2, s6_13);
s7_14 = vsubq_s16(s6_1, s5_14);
s7_15 = vsubq_s16(s6_0, s5_15);
s7_20 = sub_multiply_shift_and_narrow_s16(s6_27, s6_20, cospi_16_64);
s7_27 = add_multiply_shift_and_narrow_s16(s6_20, s6_27, cospi_16_64);
s7_21 = sub_multiply_shift_and_narrow_s16(s6_26, s6_21, cospi_16_64);
s7_26 = add_multiply_shift_and_narrow_s16(s6_21, s6_26, cospi_16_64);
s7_22 = sub_multiply_shift_and_narrow_s16(s6_25, s6_22, cospi_16_64);
s7_25 = add_multiply_shift_and_narrow_s16(s6_22, s6_25, cospi_16_64);
s7_23 = sub_multiply_shift_and_narrow_s16(s6_24, s6_23, cospi_16_64);
s7_24 = add_multiply_shift_and_narrow_s16(s6_23, s6_24, cospi_16_64);
// final stage
vst1q_s16(output, vaddq_s16(s7_0, s6_31));
output += 16;
vst1q_s16(output, vaddq_s16(s7_1, s6_30));
output += 16;
vst1q_s16(output, vaddq_s16(s7_2, s6_29));
output += 16;
vst1q_s16(output, vaddq_s16(s7_3, s6_28));
output += 16;
vst1q_s16(output, vaddq_s16(s7_4, s7_27));
output += 16;
vst1q_s16(output, vaddq_s16(s7_5, s7_26));
output += 16;
vst1q_s16(output, vaddq_s16(s7_6, s7_25));
output += 16;
vst1q_s16(output, vaddq_s16(s7_7, s7_24));
output += 16;
vst1q_s16(output, vaddq_s16(s7_8, s7_23));
output += 16;
vst1q_s16(output, vaddq_s16(s7_9, s7_22));
output += 16;
vst1q_s16(output, vaddq_s16(s7_10, s7_21));
output += 16;
vst1q_s16(output, vaddq_s16(s7_11, s7_20));
output += 16;
vst1q_s16(output, vaddq_s16(s7_12, s6_19));
output += 16;
vst1q_s16(output, vaddq_s16(s7_13, s6_18));
output += 16;
vst1q_s16(output, vaddq_s16(s7_14, s6_17));
output += 16;
vst1q_s16(output, vaddq_s16(s7_15, s6_16));
output += 16;
vst1q_s16(output, vsubq_s16(s7_15, s6_16));
output += 16;
vst1q_s16(output, vsubq_s16(s7_14, s6_17));
output += 16;
vst1q_s16(output, vsubq_s16(s7_13, s6_18));
output += 16;
vst1q_s16(output, vsubq_s16(s7_12, s6_19));
output += 16;
vst1q_s16(output, vsubq_s16(s7_11, s7_20));
output += 16;
vst1q_s16(output, vsubq_s16(s7_10, s7_21));
output += 16;
vst1q_s16(output, vsubq_s16(s7_9, s7_22));
output += 16;
vst1q_s16(output, vsubq_s16(s7_8, s7_23));
output += 16;
vst1q_s16(output, vsubq_s16(s7_7, s7_24));
output += 16;
vst1q_s16(output, vsubq_s16(s7_6, s7_25));
output += 16;
vst1q_s16(output, vsubq_s16(s7_5, s7_26));
output += 16;
vst1q_s16(output, vsubq_s16(s7_4, s7_27));
output += 16;
vst1q_s16(output, vsubq_s16(s7_3, s6_28));
output += 16;
vst1q_s16(output, vsubq_s16(s7_2, s6_29));
output += 16;
vst1q_s16(output, vsubq_s16(s7_1, s6_30));
output += 16;
vst1q_s16(output, vsubq_s16(s7_0, s6_31));
}
static void idct32_16_neon(const int16_t *input, uint8_t *output, int stride) {
int16x8_t in0, in1, in2, in3, in4, in5, in6, in7, in8, in9, in10, in11, in12,
in13, in14, in15;
int16x8_t s1_16, s1_17, s1_18, s1_19, s1_20, s1_21, s1_22, s1_23, s1_24,
s1_25, s1_26, s1_27, s1_28, s1_29, s1_30, s1_31;
int16x8_t s2_8, s2_9, s2_10, s2_11, s2_12, s2_13, s2_14, s2_15, s2_16, s2_17,
s2_18, s2_19, s2_20, s2_21, s2_22, s2_23, s2_24, s2_25, s2_26, s2_27,
s2_28, s2_29, s2_30, s2_31;
int16x8_t s3_4, s3_5, s3_6, s3_7, s3_8, s3_9, s3_10, s3_11, s3_12, s3_13,
s3_14, s3_15, s3_17, s3_18, s3_21, s3_22, s3_25, s3_26, s3_29, s3_30;
int16x8_t s4_0, s4_2, s4_3, s4_4, s4_5, s4_6, s4_7, s4_9, s4_10, s4_13, s4_14,
s4_16, s4_17, s4_18, s4_19, s4_20, s4_21, s4_22, s4_23, s4_24, s4_25,
s4_26, s4_27, s4_28, s4_29, s4_30, s4_31;
int16x8_t s5_0, s5_1, s5_2, s5_3, s5_5, s5_6, s5_8, s5_9, s5_10, s5_11, s5_12,
s5_13, s5_14, s5_15, s5_18, s5_19, s5_20, s5_21, s5_26, s5_27, s5_28,
s5_29;
int16x8_t s6_0, s6_1, s6_2, s6_3, s6_4, s6_5, s6_6, s6_7, s6_10, s6_11, s6_12,
s6_13, s6_16, s6_17, s6_18, s6_19, s6_20, s6_21, s6_22, s6_23, s6_24,
s6_25, s6_26, s6_27, s6_28, s6_29, s6_30, s6_31;
int16x8_t s7_0, s7_1, s7_2, s7_3, s7_4, s7_5, s7_6, s7_7, s7_8, s7_9, s7_10,
s7_11, s7_12, s7_13, s7_14, s7_15, s7_20, s7_21, s7_22, s7_23, s7_24,
s7_25, s7_26, s7_27;
int16x8_t out0, out1, out2, out3, out4, out5, out6, out7;
load_and_transpose_s16_8x8(input, 16, &in0, &in1, &in2, &in3, &in4, &in5,
&in6, &in7);
load_and_transpose_s16_8x8(input + 8, 16, &in8, &in9, &in10, &in11, &in12,
&in13, &in14, &in15);
// stage 1
s1_16 = multiply_shift_and_narrow_s16(in1, cospi_31_64);
s1_31 = multiply_shift_and_narrow_s16(in1, cospi_1_64);
s1_17 = multiply_shift_and_narrow_s16(in15, -cospi_17_64);
s1_30 = multiply_shift_and_narrow_s16(in15, cospi_15_64);
s1_18 = multiply_shift_and_narrow_s16(in9, cospi_23_64);
s1_29 = multiply_shift_and_narrow_s16(in9, cospi_9_64);
s1_19 = multiply_shift_and_narrow_s16(in7, -cospi_25_64);
s1_28 = multiply_shift_and_narrow_s16(in7, cospi_7_64);
s1_20 = multiply_shift_and_narrow_s16(in5, cospi_27_64);
s1_27 = multiply_shift_and_narrow_s16(in5, cospi_5_64);
s1_21 = multiply_shift_and_narrow_s16(in11, -cospi_21_64);
s1_26 = multiply_shift_and_narrow_s16(in11, cospi_11_64);
s1_22 = multiply_shift_and_narrow_s16(in13, cospi_19_64);
s1_25 = multiply_shift_and_narrow_s16(in13, cospi_13_64);
s1_23 = multiply_shift_and_narrow_s16(in3, -cospi_29_64);
s1_24 = multiply_shift_and_narrow_s16(in3, cospi_3_64);
// stage 2
s2_8 = multiply_shift_and_narrow_s16(in2, cospi_30_64);
s2_15 = multiply_shift_and_narrow_s16(in2, cospi_2_64);
s2_9 = multiply_shift_and_narrow_s16(in14, -cospi_18_64);
s2_14 = multiply_shift_and_narrow_s16(in14, cospi_14_64);
s2_10 = multiply_shift_and_narrow_s16(in10, cospi_22_64);
s2_13 = multiply_shift_and_narrow_s16(in10, cospi_10_64);
s2_11 = multiply_shift_and_narrow_s16(in6, -cospi_26_64);
s2_12 = multiply_shift_and_narrow_s16(in6, cospi_6_64);
s2_16 = vaddq_s16(s1_16, s1_17);
s2_17 = vsubq_s16(s1_16, s1_17);
s2_18 = vsubq_s16(s1_19, s1_18);
s2_19 = vaddq_s16(s1_18, s1_19);
s2_20 = vaddq_s16(s1_20, s1_21);
s2_21 = vsubq_s16(s1_20, s1_21);
s2_22 = vsubq_s16(s1_23, s1_22);
s2_23 = vaddq_s16(s1_22, s1_23);
s2_24 = vaddq_s16(s1_24, s1_25);
s2_25 = vsubq_s16(s1_24, s1_25);
s2_26 = vsubq_s16(s1_27, s1_26);
s2_27 = vaddq_s16(s1_26, s1_27);
s2_28 = vaddq_s16(s1_28, s1_29);
s2_29 = vsubq_s16(s1_28, s1_29);
s2_30 = vsubq_s16(s1_31, s1_30);
s2_31 = vaddq_s16(s1_30, s1_31);
// stage 3
s3_4 = multiply_shift_and_narrow_s16(in4, cospi_28_64);
s3_7 = multiply_shift_and_narrow_s16(in4, cospi_4_64);
s3_5 = multiply_shift_and_narrow_s16(in12, -cospi_20_64);
s3_6 = multiply_shift_and_narrow_s16(in12, cospi_12_64);
s3_8 = vaddq_s16(s2_8, s2_9);
s3_9 = vsubq_s16(s2_8, s2_9);
s3_10 = vsubq_s16(s2_11, s2_10);
s3_11 = vaddq_s16(s2_10, s2_11);
s3_12 = vaddq_s16(s2_12, s2_13);
s3_13 = vsubq_s16(s2_12, s2_13);
s3_14 = vsubq_s16(s2_15, s2_14);
s3_15 = vaddq_s16(s2_14, s2_15);
s3_17 = multiply_accumulate_shift_and_narrow_s16(s2_17, -cospi_4_64, s2_30,
cospi_28_64);
s3_30 = multiply_accumulate_shift_and_narrow_s16(s2_17, cospi_28_64, s2_30,
cospi_4_64);
s3_18 = multiply_accumulate_shift_and_narrow_s16(s2_18, -cospi_28_64, s2_29,
-cospi_4_64);
s3_29 = multiply_accumulate_shift_and_narrow_s16(s2_18, -cospi_4_64, s2_29,
cospi_28_64);
s3_21 = multiply_accumulate_shift_and_narrow_s16(s2_21, -cospi_20_64, s2_26,
cospi_12_64);
s3_26 = multiply_accumulate_shift_and_narrow_s16(s2_21, cospi_12_64, s2_26,
cospi_20_64);
s3_22 = multiply_accumulate_shift_and_narrow_s16(s2_22, -cospi_12_64, s2_25,
-cospi_20_64);
s3_25 = multiply_accumulate_shift_and_narrow_s16(s2_22, -cospi_20_64, s2_25,
cospi_12_64);
// stage 4
s4_0 = multiply_shift_and_narrow_s16(in0, cospi_16_64);
s4_2 = multiply_shift_and_narrow_s16(in8, cospi_24_64);
s4_3 = multiply_shift_and_narrow_s16(in8, cospi_8_64);
s4_4 = vaddq_s16(s3_4, s3_5);
s4_5 = vsubq_s16(s3_4, s3_5);
s4_6 = vsubq_s16(s3_7, s3_6);
s4_7 = vaddq_s16(s3_6, s3_7);
s4_9 = multiply_accumulate_shift_and_narrow_s16(s3_9, -cospi_8_64, s3_14,
cospi_24_64);
s4_14 = multiply_accumulate_shift_and_narrow_s16(s3_9, cospi_24_64, s3_14,
cospi_8_64);
s4_10 = multiply_accumulate_shift_and_narrow_s16(s3_10, -cospi_24_64, s3_13,
-cospi_8_64);
s4_13 = multiply_accumulate_shift_and_narrow_s16(s3_10, -cospi_8_64, s3_13,
cospi_24_64);
s4_16 = vaddq_s16(s2_16, s2_19);
s4_17 = vaddq_s16(s3_17, s3_18);
s4_18 = vsubq_s16(s3_17, s3_18);
s4_19 = vsubq_s16(s2_16, s2_19);
s4_20 = vsubq_s16(s2_23, s2_20);
s4_21 = vsubq_s16(s3_22, s3_21);
s4_22 = vaddq_s16(s3_21, s3_22);
s4_23 = vaddq_s16(s2_20, s2_23);
s4_24 = vaddq_s16(s2_24, s2_27);
s4_25 = vaddq_s16(s3_25, s3_26);
s4_26 = vsubq_s16(s3_25, s3_26);
s4_27 = vsubq_s16(s2_24, s2_27);
s4_28 = vsubq_s16(s2_31, s2_28);
s4_29 = vsubq_s16(s3_30, s3_29);
s4_30 = vaddq_s16(s3_29, s3_30);
s4_31 = vaddq_s16(s2_28, s2_31);
// stage 5
s5_0 = vaddq_s16(s4_0, s4_3);
s5_1 = vaddq_s16(s4_0, s4_2);
s5_2 = vsubq_s16(s4_0, s4_2);
s5_3 = vsubq_s16(s4_0, s4_3);
s5_5 = sub_multiply_shift_and_narrow_s16(s4_6, s4_5, cospi_16_64);
s5_6 = add_multiply_shift_and_narrow_s16(s4_5, s4_6, cospi_16_64);
s5_8 = vaddq_s16(s3_8, s3_11);
s5_9 = vaddq_s16(s4_9, s4_10);
s5_10 = vsubq_s16(s4_9, s4_10);
s5_11 = vsubq_s16(s3_8, s3_11);
s5_12 = vsubq_s16(s3_15, s3_12);
s5_13 = vsubq_s16(s4_14, s4_13);
s5_14 = vaddq_s16(s4_13, s4_14);
s5_15 = vaddq_s16(s3_15, s3_12);
s5_18 = multiply_accumulate_shift_and_narrow_s16(s4_18, -cospi_8_64, s4_29,
cospi_24_64);
s5_29 = multiply_accumulate_shift_and_narrow_s16(s4_18, cospi_24_64, s4_29,
cospi_8_64);
s5_19 = multiply_accumulate_shift_and_narrow_s16(s4_19, -cospi_8_64, s4_28,
cospi_24_64);
s5_28 = multiply_accumulate_shift_and_narrow_s16(s4_19, cospi_24_64, s4_28,
cospi_8_64);
s5_20 = multiply_accumulate_shift_and_narrow_s16(s4_20, -cospi_24_64, s4_27,
-cospi_8_64);
s5_27 = multiply_accumulate_shift_and_narrow_s16(s4_20, -cospi_8_64, s4_27,
cospi_24_64);
s5_21 = multiply_accumulate_shift_and_narrow_s16(s4_21, -cospi_24_64, s4_26,
-cospi_8_64);
s5_26 = multiply_accumulate_shift_and_narrow_s16(s4_21, -cospi_8_64, s4_26,
cospi_24_64);
// stage 6
s6_0 = vaddq_s16(s5_0, s4_7);
s6_1 = vaddq_s16(s5_1, s5_6);
s6_2 = vaddq_s16(s5_2, s5_5);
s6_3 = vaddq_s16(s5_3, s4_4);
s6_4 = vsubq_s16(s5_3, s4_4);
s6_5 = vsubq_s16(s5_2, s5_5);
s6_6 = vsubq_s16(s5_1, s5_6);
s6_7 = vsubq_s16(s5_0, s4_7);
s6_10 = sub_multiply_shift_and_narrow_s16(s5_13, s5_10, cospi_16_64);
s6_13 = add_multiply_shift_and_narrow_s16(s5_10, s5_13, cospi_16_64);
s6_11 = sub_multiply_shift_and_narrow_s16(s5_12, s5_11, cospi_16_64);
s6_12 = add_multiply_shift_and_narrow_s16(s5_11, s5_12, cospi_16_64);
s6_16 = vaddq_s16(s4_16, s4_23);
s6_17 = vaddq_s16(s4_17, s4_22);
s6_18 = vaddq_s16(s5_18, s5_21);
s6_19 = vaddq_s16(s5_19, s5_20);
s6_20 = vsubq_s16(s5_19, s5_20);
s6_21 = vsubq_s16(s5_18, s5_21);
s6_22 = vsubq_s16(s4_17, s4_22);
s6_23 = vsubq_s16(s4_16, s4_23);
s6_24 = vsubq_s16(s4_31, s4_24);
s6_25 = vsubq_s16(s4_30, s4_25);
s6_26 = vsubq_s16(s5_29, s5_26);
s6_27 = vsubq_s16(s5_28, s5_27);
s6_28 = vaddq_s16(s5_27, s5_28);
s6_29 = vaddq_s16(s5_26, s5_29);
s6_30 = vaddq_s16(s4_25, s4_30);
s6_31 = vaddq_s16(s4_24, s4_31);
// stage 7
s7_0 = vaddq_s16(s6_0, s5_15);
s7_1 = vaddq_s16(s6_1, s5_14);
s7_2 = vaddq_s16(s6_2, s6_13);
s7_3 = vaddq_s16(s6_3, s6_12);
s7_4 = vaddq_s16(s6_4, s6_11);
s7_5 = vaddq_s16(s6_5, s6_10);
s7_6 = vaddq_s16(s6_6, s5_9);
s7_7 = vaddq_s16(s6_7, s5_8);
s7_8 = vsubq_s16(s6_7, s5_8);
s7_9 = vsubq_s16(s6_6, s5_9);
s7_10 = vsubq_s16(s6_5, s6_10);
s7_11 = vsubq_s16(s6_4, s6_11);
s7_12 = vsubq_s16(s6_3, s6_12);
s7_13 = vsubq_s16(s6_2, s6_13);
s7_14 = vsubq_s16(s6_1, s5_14);
s7_15 = vsubq_s16(s6_0, s5_15);
s7_20 = sub_multiply_shift_and_narrow_s16(s6_27, s6_20, cospi_16_64);
s7_27 = add_multiply_shift_and_narrow_s16(s6_20, s6_27, cospi_16_64);
s7_21 = sub_multiply_shift_and_narrow_s16(s6_26, s6_21, cospi_16_64);
s7_26 = add_multiply_shift_and_narrow_s16(s6_21, s6_26, cospi_16_64);
s7_22 = sub_multiply_shift_and_narrow_s16(s6_25, s6_22, cospi_16_64);
s7_25 = add_multiply_shift_and_narrow_s16(s6_22, s6_25, cospi_16_64);
s7_23 = sub_multiply_shift_and_narrow_s16(s6_24, s6_23, cospi_16_64);
s7_24 = add_multiply_shift_and_narrow_s16(s6_23, s6_24, cospi_16_64);
// final stage
out0 = vaddq_s16(s7_0, s6_31);
out1 = vaddq_s16(s7_1, s6_30);
out2 = vaddq_s16(s7_2, s6_29);
out3 = vaddq_s16(s7_3, s6_28);
out4 = vaddq_s16(s7_4, s7_27);
out5 = vaddq_s16(s7_5, s7_26);
out6 = vaddq_s16(s7_6, s7_25);
out7 = vaddq_s16(s7_7, s7_24);
add_and_store_u8_s16(out0, out1, out2, out3, out4, out5, out6, out7, output,
stride);
out0 = vaddq_s16(s7_8, s7_23);
out1 = vaddq_s16(s7_9, s7_22);
out2 = vaddq_s16(s7_10, s7_21);
out3 = vaddq_s16(s7_11, s7_20);
out4 = vaddq_s16(s7_12, s6_19);
out5 = vaddq_s16(s7_13, s6_18);
out6 = vaddq_s16(s7_14, s6_17);
out7 = vaddq_s16(s7_15, s6_16);
add_and_store_u8_s16(out0, out1, out2, out3, out4, out5, out6, out7,
output + (8 * stride), stride);
out0 = vsubq_s16(s7_15, s6_16);
out1 = vsubq_s16(s7_14, s6_17);
out2 = vsubq_s16(s7_13, s6_18);
out3 = vsubq_s16(s7_12, s6_19);
out4 = vsubq_s16(s7_11, s7_20);
out5 = vsubq_s16(s7_10, s7_21);
out6 = vsubq_s16(s7_9, s7_22);
out7 = vsubq_s16(s7_8, s7_23);
add_and_store_u8_s16(out0, out1, out2, out3, out4, out5, out6, out7,
output + (16 * stride), stride);
out0 = vsubq_s16(s7_7, s7_24);
out1 = vsubq_s16(s7_6, s7_25);
out2 = vsubq_s16(s7_5, s7_26);
out3 = vsubq_s16(s7_4, s7_27);
out4 = vsubq_s16(s7_3, s6_28);
out5 = vsubq_s16(s7_2, s6_29);
out6 = vsubq_s16(s7_1, s6_30);
out7 = vsubq_s16(s7_0, s6_31);
add_and_store_u8_s16(out0, out1, out2, out3, out4, out5, out6, out7,
output + (24 * stride), stride);
}
void vpx_idct32x32_135_add_neon(const int16_t *input, uint8_t *dest,
int stride) {
int i;
int16_t temp[32 * 16];
int16_t *t = temp;
idct32_12_neon(input, temp);
idct32_12_neon(input + 32 * 8, temp + 8);
for (i = 0; i < 32; i += 8) {
idct32_16_neon(t, dest, stride);
t += (16 * 8);
dest += 8;
}
}