ref: 5009302bce7655054882a1bb7d2e0ad3010e712e
dir: /vpx_dsp/x86/inv_txfm_ssse3.c/
/*
* Copyright (c) 2017 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 <tmmintrin.h>
#include "./vpx_dsp_rtcd.h"
#include "vpx_dsp/x86/inv_txfm_sse2.h"
#include "vpx_dsp/x86/inv_txfm_ssse3.h"
#include "vpx_dsp/x86/transpose_sse2.h"
#include "vpx_dsp/x86/txfm_common_sse2.h"
void vpx_idct8x8_12_add_ssse3(const tran_low_t *input, uint8_t *dest,
int stride) {
__m128i io[8];
io[0] = load_input_data4(input + 0 * 8);
io[1] = load_input_data4(input + 1 * 8);
io[2] = load_input_data4(input + 2 * 8);
io[3] = load_input_data4(input + 3 * 8);
idct8x8_12_add_kernel_ssse3(io);
write_buffer_8x8(io, dest, stride);
}
static void idct32_34_first_half(const __m128i *in, __m128i *stp1) {
const __m128i stk2_0 = pair_set_epi16(2 * cospi_30_64, 2 * cospi_30_64);
const __m128i stk2_1 = pair_set_epi16(2 * cospi_2_64, 2 * cospi_2_64);
const __m128i stk2_6 = pair_set_epi16(-2 * cospi_26_64, -2 * cospi_26_64);
const __m128i stk2_7 = pair_set_epi16(2 * cospi_6_64, 2 * cospi_6_64);
const __m128i stk3_0 = pair_set_epi16(2 * cospi_28_64, 2 * cospi_28_64);
const __m128i stk3_1 = pair_set_epi16(2 * cospi_4_64, 2 * cospi_4_64);
const __m128i stk4_0 = pair_set_epi16(2 * cospi_16_64, 2 * cospi_16_64);
__m128i u0, u1, u2, u3, u4, u5, u6, u7;
__m128i x0, x1, x4, x5, x6, x7;
__m128i v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15;
// phase 1
// 0, 15
u2 = _mm_mulhrs_epi16(in[2], stk2_1); // stp2_15
u3 = _mm_mulhrs_epi16(in[6], stk2_7); // stp2_12
v15 = _mm_add_epi16(u2, u3);
// in[0], in[4]
x0 = _mm_mulhrs_epi16(in[0], stk4_0); // stp1[0]
x7 = _mm_mulhrs_epi16(in[4], stk3_1); // stp1[7]
v0 = _mm_add_epi16(x0, x7); // stp2_0
stp1[0] = _mm_add_epi16(v0, v15);
stp1[15] = _mm_sub_epi16(v0, v15);
// in[2], in[6]
u0 = _mm_mulhrs_epi16(in[2], stk2_0); // stp2_8
u1 = _mm_mulhrs_epi16(in[6], stk2_6); // stp2_11
butterfly(u2, u0, (int)cospi_24_64, (int)cospi_8_64, &u4,
&u5); // stp2_9, stp2_14
butterfly(u3, u1, -(int)cospi_8_64, (int)cospi_24_64, &u6,
&u7); // stp2_10, stp2_13
v8 = _mm_add_epi16(u0, u1);
v9 = _mm_add_epi16(u4, u6);
v10 = _mm_sub_epi16(u4, u6);
v11 = _mm_sub_epi16(u0, u1);
v12 = _mm_sub_epi16(u2, u3);
v13 = _mm_sub_epi16(u5, u7);
v14 = _mm_add_epi16(u5, u7);
butterfly(v13, v10, (int)cospi_16_64, (int)cospi_16_64, &v10, &v13);
butterfly(v12, v11, (int)cospi_16_64, (int)cospi_16_64, &v11, &v12);
// 1, 14
x1 = _mm_mulhrs_epi16(in[0], stk4_0); // stp1[1], stk4_1 = stk4_0
// stp1[2] = stp1[0], stp1[3] = stp1[1]
x4 = _mm_mulhrs_epi16(in[4], stk3_0); // stp1[4]
butterfly(x7, x4, (int)cospi_16_64, (int)cospi_16_64, &x5, &x6);
v1 = _mm_add_epi16(x1, x6); // stp2_1
v2 = _mm_add_epi16(x0, x5); // stp2_2
stp1[1] = _mm_add_epi16(v1, v14);
stp1[14] = _mm_sub_epi16(v1, v14);
stp1[2] = _mm_add_epi16(v2, v13);
stp1[13] = _mm_sub_epi16(v2, v13);
v3 = _mm_add_epi16(x1, x4); // stp2_3
v4 = _mm_sub_epi16(x1, x4); // stp2_4
v5 = _mm_sub_epi16(x0, x5); // stp2_5
v6 = _mm_sub_epi16(x1, x6); // stp2_6
v7 = _mm_sub_epi16(x0, x7); // stp2_7
stp1[3] = _mm_add_epi16(v3, v12);
stp1[12] = _mm_sub_epi16(v3, v12);
stp1[6] = _mm_add_epi16(v6, v9);
stp1[9] = _mm_sub_epi16(v6, v9);
stp1[7] = _mm_add_epi16(v7, v8);
stp1[8] = _mm_sub_epi16(v7, v8);
stp1[4] = _mm_add_epi16(v4, v11);
stp1[11] = _mm_sub_epi16(v4, v11);
stp1[5] = _mm_add_epi16(v5, v10);
stp1[10] = _mm_sub_epi16(v5, v10);
}
static void idct32_34_second_half(const __m128i *in, __m128i *stp1) {
const __m128i stk1_0 = pair_set_epi16(2 * cospi_31_64, 2 * cospi_31_64);
const __m128i stk1_1 = pair_set_epi16(2 * cospi_1_64, 2 * cospi_1_64);
const __m128i stk1_6 = pair_set_epi16(-2 * cospi_25_64, -2 * cospi_25_64);
const __m128i stk1_7 = pair_set_epi16(2 * cospi_7_64, 2 * cospi_7_64);
const __m128i stk1_8 = pair_set_epi16(2 * cospi_27_64, 2 * cospi_27_64);
const __m128i stk1_9 = pair_set_epi16(2 * cospi_5_64, 2 * cospi_5_64);
const __m128i stk1_14 = pair_set_epi16(-2 * cospi_29_64, -2 * cospi_29_64);
const __m128i stk1_15 = pair_set_epi16(2 * cospi_3_64, 2 * cospi_3_64);
__m128i v16, v17, v18, v19, v20, v21, v22, v23;
__m128i v24, v25, v26, v27, v28, v29, v30, v31;
__m128i u16, u17, u18, u19, u20, u21, u22, u23;
__m128i u24, u25, u26, u27, u28, u29, u30, u31;
v16 = _mm_mulhrs_epi16(in[1], stk1_0);
v31 = _mm_mulhrs_epi16(in[1], stk1_1);
v19 = _mm_mulhrs_epi16(in[7], stk1_6);
v28 = _mm_mulhrs_epi16(in[7], stk1_7);
v20 = _mm_mulhrs_epi16(in[5], stk1_8);
v27 = _mm_mulhrs_epi16(in[5], stk1_9);
v23 = _mm_mulhrs_epi16(in[3], stk1_14);
v24 = _mm_mulhrs_epi16(in[3], stk1_15);
butterfly(v31, v16, (int)cospi_28_64, (int)cospi_4_64, &v17, &v30);
butterfly(v28, v19, -(int)cospi_4_64, (int)cospi_28_64, &v18, &v29);
butterfly(v27, v20, (int)cospi_12_64, (int)cospi_20_64, &v21, &v26);
butterfly(v24, v23, -(int)cospi_20_64, (int)cospi_12_64, &v22, &v25);
u16 = _mm_add_epi16(v16, v19);
u17 = _mm_add_epi16(v17, v18);
u18 = _mm_sub_epi16(v17, v18);
u19 = _mm_sub_epi16(v16, v19);
u20 = _mm_sub_epi16(v23, v20);
u21 = _mm_sub_epi16(v22, v21);
u22 = _mm_add_epi16(v22, v21);
u23 = _mm_add_epi16(v23, v20);
u24 = _mm_add_epi16(v24, v27);
u27 = _mm_sub_epi16(v24, v27);
u25 = _mm_add_epi16(v25, v26);
u26 = _mm_sub_epi16(v25, v26);
u28 = _mm_sub_epi16(v31, v28);
u31 = _mm_add_epi16(v28, v31);
u29 = _mm_sub_epi16(v30, v29);
u30 = _mm_add_epi16(v29, v30);
butterfly(u29, u18, (int)cospi_24_64, (int)cospi_8_64, &u18, &u29);
butterfly(u28, u19, (int)cospi_24_64, (int)cospi_8_64, &u19, &u28);
butterfly(u27, u20, -(int)cospi_8_64, (int)cospi_24_64, &u20, &u27);
butterfly(u26, u21, -(int)cospi_8_64, (int)cospi_24_64, &u21, &u26);
stp1[16] = _mm_add_epi16(u16, u23);
stp1[23] = _mm_sub_epi16(u16, u23);
stp1[17] = _mm_add_epi16(u17, u22);
stp1[22] = _mm_sub_epi16(u17, u22);
stp1[18] = _mm_add_epi16(u18, u21);
stp1[21] = _mm_sub_epi16(u18, u21);
stp1[19] = _mm_add_epi16(u19, u20);
stp1[20] = _mm_sub_epi16(u19, u20);
stp1[24] = _mm_sub_epi16(u31, u24);
stp1[31] = _mm_add_epi16(u24, u31);
stp1[25] = _mm_sub_epi16(u30, u25);
stp1[30] = _mm_add_epi16(u25, u30);
stp1[26] = _mm_sub_epi16(u29, u26);
stp1[29] = _mm_add_epi16(u26, u29);
stp1[27] = _mm_sub_epi16(u28, u27);
stp1[28] = _mm_add_epi16(u27, u28);
butterfly(stp1[27], stp1[20], (int)cospi_16_64, (int)cospi_16_64, &stp1[20],
&stp1[27]);
butterfly(stp1[26], stp1[21], (int)cospi_16_64, (int)cospi_16_64, &stp1[21],
&stp1[26]);
butterfly(stp1[25], stp1[22], (int)cospi_16_64, (int)cospi_16_64, &stp1[22],
&stp1[25]);
butterfly(stp1[24], stp1[23], (int)cospi_16_64, (int)cospi_16_64, &stp1[23],
&stp1[24]);
}
// Only upper-left 8x8 has non-zero coeff
void vpx_idct32x32_34_add_ssse3(const tran_low_t *input, uint8_t *dest,
int stride) {
const __m128i final_rounding = _mm_set1_epi16(1 << 5);
__m128i in[32], col[32];
__m128i stp1[32];
int i;
// Load input data. Only need to load the top left 8x8 block.
in[0] = load_input_data8(input + 0 * 32);
in[1] = load_input_data8(input + 1 * 32);
in[2] = load_input_data8(input + 2 * 32);
in[3] = load_input_data8(input + 3 * 32);
in[4] = load_input_data8(input + 4 * 32);
in[5] = load_input_data8(input + 5 * 32);
in[6] = load_input_data8(input + 6 * 32);
in[7] = load_input_data8(input + 7 * 32);
transpose_16bit_8x8(in, in);
idct32_34_first_half(in, stp1);
idct32_34_second_half(in, stp1);
// 1_D: Store 32 intermediate results for each 8x32 block.
add_sub_butterfly(stp1, col, 32);
for (i = 0; i < 32; i += 8) {
int j;
// Transpose 32x8 block to 8x32 block
transpose_16bit_8x8(col + i, in);
idct32_34_first_half(in, stp1);
idct32_34_second_half(in, stp1);
// 2_D: Calculate the results and store them to destination.
add_sub_butterfly(stp1, in, 32);
for (j = 0; j < 32; ++j) {
// Final rounding and shift
in[j] = _mm_adds_epi16(in[j], final_rounding);
in[j] = _mm_srai_epi16(in[j], 6);
recon_and_store(dest + j * stride, in[j]);
}
dest += 8;
}
}
// in0[16] represents the left 8x16 block
// in1[16] represents the right 8x16 block
static void load_buffer_16x16(const tran_low_t *input, __m128i *in0,
__m128i *in1) {
int i;
for (i = 0; i < 16; i++) {
in0[i] = load_input_data8(input);
in1[i] = load_input_data8(input + 8);
input += 32;
}
}
// Group the coefficient calculation into smaller functions
// to prevent stack spillover:
// quarter_1: 0-7
// quarter_2: 8-15
// quarter_3_4: 16-23, 24-31
static void idct32_8x32_135_quarter_1(const __m128i *in /*in[16]*/,
__m128i *out /*out[8]*/) {
__m128i u0, u1, u2, u3, u4, u5, u6, u7;
__m128i v0, v1, v2, v3, v4, v5, v6, v7;
{
const __m128i stk4_0 = pair_set_epi16(2 * cospi_16_64, 2 * cospi_16_64);
const __m128i stk4_2 = pair_set_epi16(2 * cospi_24_64, 2 * cospi_24_64);
const __m128i stk4_3 = pair_set_epi16(2 * cospi_8_64, 2 * cospi_8_64);
u0 = _mm_mulhrs_epi16(in[0], stk4_0);
u2 = _mm_mulhrs_epi16(in[8], stk4_2);
u3 = _mm_mulhrs_epi16(in[8], stk4_3);
u1 = u0;
}
v0 = _mm_add_epi16(u0, u3);
v1 = _mm_add_epi16(u1, u2);
v2 = _mm_sub_epi16(u1, u2);
v3 = _mm_sub_epi16(u0, u3);
{
const __m128i stk3_0 = pair_set_epi16(2 * cospi_28_64, 2 * cospi_28_64);
const __m128i stk3_1 = pair_set_epi16(2 * cospi_4_64, 2 * cospi_4_64);
const __m128i stk3_2 = pair_set_epi16(-2 * cospi_20_64, -2 * cospi_20_64);
const __m128i stk3_3 = pair_set_epi16(2 * cospi_12_64, 2 * cospi_12_64);
u4 = _mm_mulhrs_epi16(in[4], stk3_0);
u7 = _mm_mulhrs_epi16(in[4], stk3_1);
u5 = _mm_mulhrs_epi16(in[12], stk3_2);
u6 = _mm_mulhrs_epi16(in[12], stk3_3);
}
v4 = _mm_add_epi16(u4, u5);
v5 = _mm_sub_epi16(u4, u5);
v6 = _mm_sub_epi16(u7, u6);
v7 = _mm_add_epi16(u7, u6);
butterfly(v6, v5, (int)cospi_16_64, (int)cospi_16_64, &v5, &v6);
out[0] = _mm_add_epi16(v0, v7);
out[1] = _mm_add_epi16(v1, v6);
out[2] = _mm_add_epi16(v2, v5);
out[3] = _mm_add_epi16(v3, v4);
out[4] = _mm_sub_epi16(v3, v4);
out[5] = _mm_sub_epi16(v2, v5);
out[6] = _mm_sub_epi16(v1, v6);
out[7] = _mm_sub_epi16(v0, v7);
}
static void idct32_8x32_135_quarter_2(const __m128i *in /*in[16]*/,
__m128i *out /*out[8]*/) {
__m128i u8, u9, u10, u11, u12, u13, u14, u15;
__m128i v8, v9, v10, v11, v12, v13, v14, v15;
{
const __m128i stk2_0 = pair_set_epi16(2 * cospi_30_64, 2 * cospi_30_64);
const __m128i stk2_1 = pair_set_epi16(2 * cospi_2_64, 2 * cospi_2_64);
const __m128i stk2_2 = pair_set_epi16(-2 * cospi_18_64, -2 * cospi_18_64);
const __m128i stk2_3 = pair_set_epi16(2 * cospi_14_64, 2 * cospi_14_64);
const __m128i stk2_4 = pair_set_epi16(2 * cospi_22_64, 2 * cospi_22_64);
const __m128i stk2_5 = pair_set_epi16(2 * cospi_10_64, 2 * cospi_10_64);
const __m128i stk2_6 = pair_set_epi16(-2 * cospi_26_64, -2 * cospi_26_64);
const __m128i stk2_7 = pair_set_epi16(2 * cospi_6_64, 2 * cospi_6_64);
u8 = _mm_mulhrs_epi16(in[2], stk2_0);
u15 = _mm_mulhrs_epi16(in[2], stk2_1);
u9 = _mm_mulhrs_epi16(in[14], stk2_2);
u14 = _mm_mulhrs_epi16(in[14], stk2_3);
u10 = _mm_mulhrs_epi16(in[10], stk2_4);
u13 = _mm_mulhrs_epi16(in[10], stk2_5);
u11 = _mm_mulhrs_epi16(in[6], stk2_6);
u12 = _mm_mulhrs_epi16(in[6], stk2_7);
}
v8 = _mm_add_epi16(u8, u9);
v9 = _mm_sub_epi16(u8, u9);
v10 = _mm_sub_epi16(u11, u10);
v11 = _mm_add_epi16(u11, u10);
v12 = _mm_add_epi16(u12, u13);
v13 = _mm_sub_epi16(u12, u13);
v14 = _mm_sub_epi16(u15, u14);
v15 = _mm_add_epi16(u15, u14);
butterfly(v14, v9, (int)cospi_24_64, (int)cospi_8_64, &v9, &v14);
butterfly(v13, v10, -(int)cospi_8_64, (int)cospi_24_64, &v10, &v13);
out[0] = _mm_add_epi16(v8, v11);
out[1] = _mm_add_epi16(v9, v10);
out[2] = _mm_sub_epi16(v9, v10);
out[3] = _mm_sub_epi16(v8, v11);
out[4] = _mm_sub_epi16(v15, v12);
out[5] = _mm_sub_epi16(v14, v13);
out[6] = _mm_add_epi16(v14, v13);
out[7] = _mm_add_epi16(v15, v12);
butterfly(out[5], out[2], (int)cospi_16_64, (int)cospi_16_64, &out[2],
&out[5]);
butterfly(out[4], out[3], (int)cospi_16_64, (int)cospi_16_64, &out[3],
&out[4]);
}
// 8x32 block even indexed 8 inputs of in[16],
// output first half 16 to out[32]
static void idct32_8x32_quarter_1_2(const __m128i *in /*in[16]*/,
__m128i *out /*out[32]*/) {
__m128i temp[16];
idct32_8x32_135_quarter_1(in, temp);
idct32_8x32_135_quarter_2(in, &temp[8]);
add_sub_butterfly(temp, out, 16);
}
// 8x32 block odd indexed 8 inputs of in[16],
// output second half 16 to out[32]
static void idct32_8x32_quarter_3_4(const __m128i *in /*in[16]*/,
__m128i *out /*out[32]*/) {
__m128i v16, v17, v18, v19, v20, v21, v22, v23;
__m128i v24, v25, v26, v27, v28, v29, v30, v31;
__m128i u16, u17, u18, u19, u20, u21, u22, u23;
__m128i u24, u25, u26, u27, u28, u29, u30, u31;
{
const __m128i stk1_0 = pair_set_epi16(2 * cospi_31_64, 2 * cospi_31_64);
const __m128i stk1_1 = pair_set_epi16(2 * cospi_1_64, 2 * cospi_1_64);
const __m128i stk1_2 = pair_set_epi16(-2 * cospi_17_64, -2 * cospi_17_64);
const __m128i stk1_3 = pair_set_epi16(2 * cospi_15_64, 2 * cospi_15_64);
const __m128i stk1_4 = pair_set_epi16(2 * cospi_23_64, 2 * cospi_23_64);
const __m128i stk1_5 = pair_set_epi16(2 * cospi_9_64, 2 * cospi_9_64);
const __m128i stk1_6 = pair_set_epi16(-2 * cospi_25_64, -2 * cospi_25_64);
const __m128i stk1_7 = pair_set_epi16(2 * cospi_7_64, 2 * cospi_7_64);
const __m128i stk1_8 = pair_set_epi16(2 * cospi_27_64, 2 * cospi_27_64);
const __m128i stk1_9 = pair_set_epi16(2 * cospi_5_64, 2 * cospi_5_64);
const __m128i stk1_10 = pair_set_epi16(-2 * cospi_21_64, -2 * cospi_21_64);
const __m128i stk1_11 = pair_set_epi16(2 * cospi_11_64, 2 * cospi_11_64);
const __m128i stk1_12 = pair_set_epi16(2 * cospi_19_64, 2 * cospi_19_64);
const __m128i stk1_13 = pair_set_epi16(2 * cospi_13_64, 2 * cospi_13_64);
const __m128i stk1_14 = pair_set_epi16(-2 * cospi_29_64, -2 * cospi_29_64);
const __m128i stk1_15 = pair_set_epi16(2 * cospi_3_64, 2 * cospi_3_64);
u16 = _mm_mulhrs_epi16(in[1], stk1_0);
u31 = _mm_mulhrs_epi16(in[1], stk1_1);
u17 = _mm_mulhrs_epi16(in[15], stk1_2);
u30 = _mm_mulhrs_epi16(in[15], stk1_3);
u18 = _mm_mulhrs_epi16(in[9], stk1_4);
u29 = _mm_mulhrs_epi16(in[9], stk1_5);
u19 = _mm_mulhrs_epi16(in[7], stk1_6);
u28 = _mm_mulhrs_epi16(in[7], stk1_7);
u20 = _mm_mulhrs_epi16(in[5], stk1_8);
u27 = _mm_mulhrs_epi16(in[5], stk1_9);
u21 = _mm_mulhrs_epi16(in[11], stk1_10);
u26 = _mm_mulhrs_epi16(in[11], stk1_11);
u22 = _mm_mulhrs_epi16(in[13], stk1_12);
u25 = _mm_mulhrs_epi16(in[13], stk1_13);
u23 = _mm_mulhrs_epi16(in[3], stk1_14);
u24 = _mm_mulhrs_epi16(in[3], stk1_15);
}
v16 = _mm_add_epi16(u16, u17);
v17 = _mm_sub_epi16(u16, u17);
v18 = _mm_sub_epi16(u19, u18);
v19 = _mm_add_epi16(u19, u18);
v20 = _mm_add_epi16(u20, u21);
v21 = _mm_sub_epi16(u20, u21);
v22 = _mm_sub_epi16(u23, u22);
v23 = _mm_add_epi16(u23, u22);
v24 = _mm_add_epi16(u24, u25);
v25 = _mm_sub_epi16(u24, u25);
v26 = _mm_sub_epi16(u27, u26);
v27 = _mm_add_epi16(u27, u26);
v28 = _mm_add_epi16(u28, u29);
v29 = _mm_sub_epi16(u28, u29);
v30 = _mm_sub_epi16(u31, u30);
v31 = _mm_add_epi16(u31, u30);
butterfly(v30, v17, (int)cospi_28_64, (int)cospi_4_64, &v17, &v30);
butterfly(v29, v18, -(int)cospi_4_64, (int)cospi_28_64, &v18, &v29);
butterfly(v26, v21, (int)cospi_12_64, (int)cospi_20_64, &v21, &v26);
butterfly(v25, v22, -(int)cospi_20_64, (int)cospi_12_64, &v22, &v25);
u16 = _mm_add_epi16(v16, v19);
u17 = _mm_add_epi16(v17, v18);
u18 = _mm_sub_epi16(v17, v18);
u19 = _mm_sub_epi16(v16, v19);
u20 = _mm_sub_epi16(v23, v20);
u21 = _mm_sub_epi16(v22, v21);
u22 = _mm_add_epi16(v22, v21);
u23 = _mm_add_epi16(v23, v20);
u24 = _mm_add_epi16(v24, v27);
u25 = _mm_add_epi16(v25, v26);
u26 = _mm_sub_epi16(v25, v26);
u27 = _mm_sub_epi16(v24, v27);
u28 = _mm_sub_epi16(v31, v28);
u29 = _mm_sub_epi16(v30, v29);
u30 = _mm_add_epi16(v29, v30);
u31 = _mm_add_epi16(v28, v31);
butterfly(u29, u18, (int)cospi_24_64, (int)cospi_8_64, &u18, &u29);
butterfly(u28, u19, (int)cospi_24_64, (int)cospi_8_64, &u19, &u28);
butterfly(u27, u20, -(int)cospi_8_64, (int)cospi_24_64, &u20, &u27);
butterfly(u26, u21, -(int)cospi_8_64, (int)cospi_24_64, &u21, &u26);
out[0] = _mm_add_epi16(u16, u23);
out[1] = _mm_add_epi16(u17, u22);
out[2] = _mm_add_epi16(u18, u21);
out[3] = _mm_add_epi16(u19, u20);
v20 = _mm_sub_epi16(u19, u20);
v21 = _mm_sub_epi16(u18, u21);
v22 = _mm_sub_epi16(u17, u22);
v23 = _mm_sub_epi16(u16, u23);
v24 = _mm_sub_epi16(u31, u24);
v25 = _mm_sub_epi16(u30, u25);
v26 = _mm_sub_epi16(u29, u26);
v27 = _mm_sub_epi16(u28, u27);
out[12] = _mm_add_epi16(u27, u28);
out[13] = _mm_add_epi16(u26, u29);
out[14] = _mm_add_epi16(u25, u30);
out[15] = _mm_add_epi16(u24, u31);
butterfly(v27, v20, (int)cospi_16_64, (int)cospi_16_64, &out[4], &out[11]);
butterfly(v26, v21, (int)cospi_16_64, (int)cospi_16_64, &out[5], &out[10]);
butterfly(v25, v22, (int)cospi_16_64, (int)cospi_16_64, &out[6], &out[9]);
butterfly(v24, v23, (int)cospi_16_64, (int)cospi_16_64, &out[7], &out[8]);
}
// 8x16 block, input __m128i in[16], output __m128i in[32]
static void idct32_8x32_135(__m128i *in /*in[32]*/) {
__m128i out[32];
idct32_8x32_quarter_1_2(in, out);
idct32_8x32_quarter_3_4(in, &out[16]);
add_sub_butterfly(out, in, 32);
}
static INLINE void recon_and_store_ssse3(__m128i *in0, __m128i *in1,
uint8_t *dest, int stride) {
store_buffer_8x32(in0, dest, stride);
store_buffer_8x32(in1, dest + 8, stride);
}
static INLINE void idct32_135(__m128i *col0, __m128i *col1) {
idct32_8x32_135(col0);
idct32_8x32_135(col1);
}
typedef enum { left_16, right_16 } ColsIndicator;
static void transpose_and_copy_16x16(__m128i *in0, __m128i *in1, __m128i *store,
ColsIndicator cols) {
switch (cols) {
case left_16: {
int i;
transpose_16bit_16x16(in0, in1);
for (i = 0; i < 16; ++i) {
store[i] = in0[16 + i];
store[16 + i] = in1[16 + i];
}
break;
}
case right_16: {
transpose_16bit_8x8(store, in0);
transpose_16bit_8x8(&store[8], in1);
transpose_16bit_8x8(&store[16], &in0[8]);
transpose_16bit_8x8(&store[24], &in1[8]);
break;
}
default: { assert(0); }
}
}
// Only upper-left 16x16 has non-zero coeff
void vpx_idct32x32_135_add_ssse3(const tran_low_t *input, uint8_t *dest,
int stride) {
// Each array represents an 8x32 block
__m128i col0[32], col1[32];
// This array represents a 16x16 block
__m128i temp[32];
// Load input data. Only need to load the top left 16x16 block.
load_buffer_16x16(input, col0, col1);
// columns
transpose_16bit_16x16(col0, col1);
idct32_135(col0, col1);
// rows
transpose_and_copy_16x16(col0, col1, temp, left_16);
idct32_135(col0, col1);
recon_and_store_ssse3(col0, col1, dest, stride);
transpose_and_copy_16x16(col0, col1, temp, right_16);
idct32_135(col0, col1);
recon_and_store_ssse3(col0, col1, dest + 16, stride);
}