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aomedia / aom / bbdfa68d13a0 / . / av1 / common / x86 / highbd_inv_txfm_avx2.c
blob: 93e98e4b3dffc9e568db5723fbb82b970c00b3cc [file] [log] [blame]
/*
* Copyright (c) 2016, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. If the Alliance for Open
* Media Patent License 1.0 was not distributed with this source code in the
* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
*/
#include <assert.h>
#include <immintrin.h>
#include "config/aom_config.h"
#include "config/av1_rtcd.h"
#include "av1/common/av1_inv_txfm1d_cfg.h"
#include "av1/common/idct.h"
#include "av1/common/x86/av1_inv_txfm_ssse3.h"
#include "av1/common/x86/highbd_txfm_utility_sse4.h"
#include "aom_dsp/x86/txfm_common_avx2.h"
// Note:
// Total 32x4 registers to represent 32x32 block coefficients.
// For high bit depth, each coefficient is 4-byte.
// Each __m256i register holds 8 coefficients.
// So each "row" we needs 4 register. Totally 32 rows
// Register layout:
// v0, v1, v2, v3,
// v4, v5, v6, v7,
// ... ...
// v124, v125, v126, v127
static INLINE __m256i highbd_clamp_epi16_avx2(__m256i u, int bd) {
const __m256i zero = _mm256_setzero_si256();
const __m256i one = _mm256_set1_epi16(1);
const __m256i max = _mm256_sub_epi16(_mm256_slli_epi16(one, bd), one);
__m256i clamped, mask;
mask = _mm256_cmpgt_epi16(u, max);
clamped = _mm256_andnot_si256(mask, u);
mask = _mm256_and_si256(mask, max);
clamped = _mm256_or_si256(mask, clamped);
mask = _mm256_cmpgt_epi16(clamped, zero);
clamped = _mm256_and_si256(clamped, mask);
return clamped;
}
static INLINE void round_shift_4x4_avx2(__m256i *in, int shift) {
if (shift != 0) {
__m256i rnding = _mm256_set1_epi32(1 << (shift - 1));
in[0] = _mm256_add_epi32(in[0], rnding);
in[1] = _mm256_add_epi32(in[1], rnding);
in[2] = _mm256_add_epi32(in[2], rnding);
in[3] = _mm256_add_epi32(in[3], rnding);
in[0] = _mm256_srai_epi32(in[0], shift);
in[1] = _mm256_srai_epi32(in[1], shift);
in[2] = _mm256_srai_epi32(in[2], shift);
in[3] = _mm256_srai_epi32(in[3], shift);
}
}
static INLINE void round_shift_8x8_avx2(__m256i *in, int shift) {
round_shift_4x4_avx2(in, shift);
round_shift_4x4_avx2(in + 4, shift);
round_shift_4x4_avx2(in + 8, shift);
round_shift_4x4_avx2(in + 12, shift);
}
static void highbd_clamp_epi32_avx2(__m256i *in, __m256i *out,
const __m256i *clamp_lo,
const __m256i *clamp_hi, int size) {
__m256i a0, a1;
for (int i = 0; i < size; i += 4) {
a0 = _mm256_max_epi32(in[i], *clamp_lo);
out[i] = _mm256_min_epi32(a0, *clamp_hi);
a1 = _mm256_max_epi32(in[i + 1], *clamp_lo);
out[i + 1] = _mm256_min_epi32(a1, *clamp_hi);
a0 = _mm256_max_epi32(in[i + 2], *clamp_lo);
out[i + 2] = _mm256_min_epi32(a0, *clamp_hi);
a1 = _mm256_max_epi32(in[i + 3], *clamp_lo);
out[i + 3] = _mm256_min_epi32(a1, *clamp_hi);
}
}
static INLINE __m256i highbd_get_recon_16x8_avx2(const __m256i pred,
__m256i res0, __m256i res1,
const int bd) {
__m256i x0 = _mm256_cvtepi16_epi32(_mm256_castsi256_si128(pred));
__m256i x1 = _mm256_cvtepi16_epi32(_mm256_extractf128_si256(pred, 1));
x0 = _mm256_add_epi32(res0, x0);
x1 = _mm256_add_epi32(res1, x1);
x0 = _mm256_packus_epi32(x0, x1);
x0 = _mm256_permute4x64_epi64(x0, 0xd8);
x0 = highbd_clamp_epi16_avx2(x0, bd);
return x0;
}
static INLINE void highbd_write_buffer_16xn_avx2(__m256i *in, uint16_t *output,
int stride, int flipud,
int height, const int bd) {
int j = flipud ? (height - 1) : 0;
const int step = flipud ? -1 : 1;
for (int i = 0; i < height; ++i, j += step) {
__m256i v = _mm256_loadu_si256((__m256i const *)(output + i * stride));
__m256i u = highbd_get_recon_16x8_avx2(v, in[j], in[j + height], bd);
_mm256_storeu_si256((__m256i *)(output + i * stride), u);
}
}
static INLINE __m256i highbd_get_recon_8x8_avx2(const __m256i pred, __m256i res,
const int bd) {
__m256i x0 = pred;
x0 = _mm256_add_epi32(res, x0);
x0 = _mm256_packus_epi32(x0, x0);
x0 = _mm256_permute4x64_epi64(x0, 0xd8);
x0 = highbd_clamp_epi16_avx2(x0, bd);
return x0;
}
static INLINE void highbd_write_buffer_8xn_avx2(__m256i *in, uint16_t *output,
int stride, int flipud,
int height, const int bd) {
int j = flipud ? (height - 1) : 0;
__m128i temp;
const int step = flipud ? -1 : 1;
for (int i = 0; i < height; ++i, j += step) {
temp = _mm_loadu_si128((__m128i const *)(output + i * stride));
__m256i v = _mm256_cvtepi16_epi32(temp);
__m256i u = highbd_get_recon_8x8_avx2(v, in[j], bd);
__m128i u1 = _mm256_castsi256_si128(u);
_mm_storeu_si128((__m128i *)(output + i * stride), u1);
}
}
static void neg_shift_avx2(const __m256i in0, const __m256i in1, __m256i *out0,
__m256i *out1, const __m256i *clamp_lo,
const __m256i *clamp_hi, int shift) {
__m256i offset = _mm256_set1_epi32((1 << shift) >> 1);
__m256i a0 = _mm256_add_epi32(offset, in0);
__m256i a1 = _mm256_sub_epi32(offset, in1);
a0 = _mm256_sra_epi32(a0, _mm_cvtsi32_si128(shift));
a1 = _mm256_sra_epi32(a1, _mm_cvtsi32_si128(shift));
a0 = _mm256_max_epi32(a0, *clamp_lo);
a0 = _mm256_min_epi32(a0, *clamp_hi);
a1 = _mm256_max_epi32(a1, *clamp_lo);
a1 = _mm256_min_epi32(a1, *clamp_hi);
*out0 = a0;
*out1 = a1;
}
static void transpose_8x8_avx2(const __m256i *in, __m256i *out) {
__m256i u0, u1, u2, u3, u4, u5, u6, u7;
__m256i x0, x1;
u0 = _mm256_unpacklo_epi32(in[0], in[1]);
u1 = _mm256_unpackhi_epi32(in[0], in[1]);
u2 = _mm256_unpacklo_epi32(in[2], in[3]);
u3 = _mm256_unpackhi_epi32(in[2], in[3]);
u4 = _mm256_unpacklo_epi32(in[4], in[5]);
u5 = _mm256_unpackhi_epi32(in[4], in[5]);
u6 = _mm256_unpacklo_epi32(in[6], in[7]);
u7 = _mm256_unpackhi_epi32(in[6], in[7]);
x0 = _mm256_unpacklo_epi64(u0, u2);
x1 = _mm256_unpacklo_epi64(u4, u6);
out[0] = _mm256_permute2f128_si256(x0, x1, 0x20);
out[4] = _mm256_permute2f128_si256(x0, x1, 0x31);
x0 = _mm256_unpackhi_epi64(u0, u2);
x1 = _mm256_unpackhi_epi64(u4, u6);
out[1] = _mm256_permute2f128_si256(x0, x1, 0x20);
out[5] = _mm256_permute2f128_si256(x0, x1, 0x31);
x0 = _mm256_unpacklo_epi64(u1, u3);
x1 = _mm256_unpacklo_epi64(u5, u7);
out[2] = _mm256_permute2f128_si256(x0, x1, 0x20);
out[6] = _mm256_permute2f128_si256(x0, x1, 0x31);
x0 = _mm256_unpackhi_epi64(u1, u3);
x1 = _mm256_unpackhi_epi64(u5, u7);
out[3] = _mm256_permute2f128_si256(x0, x1, 0x20);
out[7] = _mm256_permute2f128_si256(x0, x1, 0x31);
}
static void transpose_8x8_flip_avx2(const __m256i *in, __m256i *out) {
__m256i u0, u1, u2, u3, u4, u5, u6, u7;
__m256i x0, x1;
u0 = _mm256_unpacklo_epi32(in[7], in[6]);
u1 = _mm256_unpackhi_epi32(in[7], in[6]);
u2 = _mm256_unpacklo_epi32(in[5], in[4]);
u3 = _mm256_unpackhi_epi32(in[5], in[4]);
u4 = _mm256_unpacklo_epi32(in[3], in[2]);
u5 = _mm256_unpackhi_epi32(in[3], in[2]);
u6 = _mm256_unpacklo_epi32(in[1], in[0]);
u7 = _mm256_unpackhi_epi32(in[1], in[0]);
x0 = _mm256_unpacklo_epi64(u0, u2);
x1 = _mm256_unpacklo_epi64(u4, u6);
out[0] = _mm256_permute2f128_si256(x0, x1, 0x20);
out[4] = _mm256_permute2f128_si256(x0, x1, 0x31);
x0 = _mm256_unpackhi_epi64(u0, u2);
x1 = _mm256_unpackhi_epi64(u4, u6);
out[1] = _mm256_permute2f128_si256(x0, x1, 0x20);
out[5] = _mm256_permute2f128_si256(x0, x1, 0x31);
x0 = _mm256_unpacklo_epi64(u1, u3);
x1 = _mm256_unpacklo_epi64(u5, u7);
out[2] = _mm256_permute2f128_si256(x0, x1, 0x20);
out[6] = _mm256_permute2f128_si256(x0, x1, 0x31);
x0 = _mm256_unpackhi_epi64(u1, u3);
x1 = _mm256_unpackhi_epi64(u5, u7);
out[3] = _mm256_permute2f128_si256(x0, x1, 0x20);
out[7] = _mm256_permute2f128_si256(x0, x1, 0x31);
}
static void load_buffer_32x32(const int32_t *coeff, __m256i *in,
int input_stiride, int size) {
int i;
for (i = 0; i < size; ++i) {
in[i] = _mm256_loadu_si256((const __m256i *)(coeff + i * input_stiride));
}
}
static INLINE __m256i half_btf_0_avx2(const __m256i *w0, const __m256i *n0,
const __m256i *rounding, int bit) {
__m256i x;
x = _mm256_mullo_epi32(*w0, *n0);
x = _mm256_add_epi32(x, *rounding);
x = _mm256_srai_epi32(x, bit);
return x;
}
static INLINE __m256i half_btf_avx2(const __m256i *w0, const __m256i *n0,
const __m256i *w1, const __m256i *n1,
const __m256i *rounding, int bit) {
__m256i x, y;
x = _mm256_mullo_epi32(*w0, *n0);
y = _mm256_mullo_epi32(*w1, *n1);
x = _mm256_add_epi32(x, y);
x = _mm256_add_epi32(x, *rounding);
x = _mm256_srai_epi32(x, bit);
return x;
}
static void addsub_avx2(const __m256i in0, const __m256i in1, __m256i *out0,
__m256i *out1, const __m256i *clamp_lo,
const __m256i *clamp_hi) {
__m256i a0 = _mm256_add_epi32(in0, in1);
__m256i a1 = _mm256_sub_epi32(in0, in1);
a0 = _mm256_max_epi32(a0, *clamp_lo);
a0 = _mm256_min_epi32(a0, *clamp_hi);
a1 = _mm256_max_epi32(a1, *clamp_lo);
a1 = _mm256_min_epi32(a1, *clamp_hi);
*out0 = a0;
*out1 = a1;
}
static INLINE void idct32_stage4_avx2(
__m256i *bf1, const __m256i *cospim8, const __m256i *cospi56,
const __m256i *cospi8, const __m256i *cospim56, const __m256i *cospim40,
const __m256i *cospi24, const __m256i *cospi40, const __m256i *cospim24,
const __m256i *rounding, int bit) {
__m256i temp1, temp2;
temp1 = half_btf_avx2(cospim8, &bf1[17], cospi56, &bf1[30], rounding, bit);
bf1[30] = half_btf_avx2(cospi56, &bf1[17], cospi8, &bf1[30], rounding, bit);
bf1[17] = temp1;
temp2 = half_btf_avx2(cospim56, &bf1[18], cospim8, &bf1[29], rounding, bit);
bf1[29] = half_btf_avx2(cospim8, &bf1[18], cospi56, &bf1[29], rounding, bit);
bf1[18] = temp2;
temp1 = half_btf_avx2(cospim40, &bf1[21], cospi24, &bf1[26], rounding, bit);
bf1[26] = half_btf_avx2(cospi24, &bf1[21], cospi40, &bf1[26], rounding, bit);
bf1[21] = temp1;
temp2 = half_btf_avx2(cospim24, &bf1[22], cospim40, &bf1[25], rounding, bit);
bf1[25] = half_btf_avx2(cospim40, &bf1[22], cospi24, &bf1[25], rounding, bit);
bf1[22] = temp2;
}
static INLINE void idct32_stage5_avx2(
__m256i *bf1, const __m256i *cospim16, const __m256i *cospi48,
const __m256i *cospi16, const __m256i *cospim48, const __m256i *clamp_lo,
const __m256i *clamp_hi, const __m256i *rounding, int bit) {
__m256i temp1, temp2;
temp1 = half_btf_avx2(cospim16, &bf1[9], cospi48, &bf1[14], rounding, bit);
bf1[14] = half_btf_avx2(cospi48, &bf1[9], cospi16, &bf1[14], rounding, bit);
bf1[9] = temp1;
temp2 = half_btf_avx2(cospim48, &bf1[10], cospim16, &bf1[13], rounding, bit);
bf1[13] = half_btf_avx2(cospim16, &bf1[10], cospi48, &bf1[13], rounding, bit);
bf1[10] = temp2;
addsub_avx2(bf1[16], bf1[19], bf1 + 16, bf1 + 19, clamp_lo, clamp_hi);
addsub_avx2(bf1[17], bf1[18], bf1 + 17, bf1 + 18, clamp_lo, clamp_hi);
addsub_avx2(bf1[23], bf1[20], bf1 + 23, bf1 + 20, clamp_lo, clamp_hi);
addsub_avx2(bf1[22], bf1[21], bf1 + 22, bf1 + 21, clamp_lo, clamp_hi);
addsub_avx2(bf1[24], bf1[27], bf1 + 24, bf1 + 27, clamp_lo, clamp_hi);
addsub_avx2(bf1[25], bf1[26], bf1 + 25, bf1 + 26, clamp_lo, clamp_hi);
addsub_avx2(bf1[31], bf1[28], bf1 + 31, bf1 + 28, clamp_lo, clamp_hi);
addsub_avx2(bf1[30], bf1[29], bf1 + 30, bf1 + 29, clamp_lo, clamp_hi);
}
static INLINE void idct32_stage6_avx2(
__m256i *bf1, const __m256i *cospim32, const __m256i *cospi32,
const __m256i *cospim16, const __m256i *cospi48, const __m256i *cospi16,
const __m256i *cospim48, const __m256i *clamp_lo, const __m256i *clamp_hi,
const __m256i *rounding, int bit) {
__m256i temp1, temp2;
temp1 = half_btf_avx2(cospim32, &bf1[5], cospi32, &bf1[6], rounding, bit);
bf1[6] = half_btf_avx2(cospi32, &bf1[5], cospi32, &bf1[6], rounding, bit);
bf1[5] = temp1;
addsub_avx2(bf1[8], bf1[11], bf1 + 8, bf1 + 11, clamp_lo, clamp_hi);
addsub_avx2(bf1[9], bf1[10], bf1 + 9, bf1 + 10, clamp_lo, clamp_hi);
addsub_avx2(bf1[15], bf1[12], bf1 + 15, bf1 + 12, clamp_lo, clamp_hi);
addsub_avx2(bf1[14], bf1[13], bf1 + 14, bf1 + 13, clamp_lo, clamp_hi);
temp1 = half_btf_avx2(cospim16, &bf1[18], cospi48, &bf1[29], rounding, bit);
bf1[29] = half_btf_avx2(cospi48, &bf1[18], cospi16, &bf1[29], rounding, bit);
bf1[18] = temp1;
temp2 = half_btf_avx2(cospim16, &bf1[19], cospi48, &bf1[28], rounding, bit);
bf1[28] = half_btf_avx2(cospi48, &bf1[19], cospi16, &bf1[28], rounding, bit);
bf1[19] = temp2;
temp1 = half_btf_avx2(cospim48, &bf1[20], cospim16, &bf1[27], rounding, bit);
bf1[27] = half_btf_avx2(cospim16, &bf1[20], cospi48, &bf1[27], rounding, bit);
bf1[20] = temp1;
temp2 = half_btf_avx2(cospim48, &bf1[21], cospim16, &bf1[26], rounding, bit);
bf1[26] = half_btf_avx2(cospim16, &bf1[21], cospi48, &bf1[26], rounding, bit);
bf1[21] = temp2;
}
static INLINE void idct32_stage7_avx2(__m256i *bf1, const __m256i *cospim32,
const __m256i *cospi32,
const __m256i *clamp_lo,
const __m256i *clamp_hi,
const __m256i *rounding, int bit) {
__m256i temp1, temp2;
addsub_avx2(bf1[0], bf1[7], bf1 + 0, bf1 + 7, clamp_lo, clamp_hi);
addsub_avx2(bf1[1], bf1[6], bf1 + 1, bf1 + 6, clamp_lo, clamp_hi);
addsub_avx2(bf1[2], bf1[5], bf1 + 2, bf1 + 5, clamp_lo, clamp_hi);
addsub_avx2(bf1[3], bf1[4], bf1 + 3, bf1 + 4, clamp_lo, clamp_hi);
temp1 = half_btf_avx2(cospim32, &bf1[10], cospi32, &bf1[13], rounding, bit);
bf1[13] = half_btf_avx2(cospi32, &bf1[10], cospi32, &bf1[13], rounding, bit);
bf1[10] = temp1;
temp2 = half_btf_avx2(cospim32, &bf1[11], cospi32, &bf1[12], rounding, bit);
bf1[12] = half_btf_avx2(cospi32, &bf1[11], cospi32, &bf1[12], rounding, bit);
bf1[11] = temp2;
addsub_avx2(bf1[16], bf1[23], bf1 + 16, bf1 + 23, clamp_lo, clamp_hi);
addsub_avx2(bf1[17], bf1[22], bf1 + 17, bf1 + 22, clamp_lo, clamp_hi);
addsub_avx2(bf1[18], bf1[21], bf1 + 18, bf1 + 21, clamp_lo, clamp_hi);
addsub_avx2(bf1[19], bf1[20], bf1 + 19, bf1 + 20, clamp_lo, clamp_hi);
addsub_avx2(bf1[31], bf1[24], bf1 + 31, bf1 + 24, clamp_lo, clamp_hi);
addsub_avx2(bf1[30], bf1[25], bf1 + 30, bf1 + 25, clamp_lo, clamp_hi);
addsub_avx2(bf1[29], bf1[26], bf1 + 29, bf1 + 26, clamp_lo, clamp_hi);
addsub_avx2(bf1[28], bf1[27], bf1 + 28, bf1 + 27, clamp_lo, clamp_hi);
}
static INLINE void idct32_stage8_avx2(__m256i *bf1, const __m256i *cospim32,
const __m256i *cospi32,
const __m256i *clamp_lo,
const __m256i *clamp_hi,
const __m256i *rounding, int bit) {
__m256i temp1, temp2;
addsub_avx2(bf1[0], bf1[15], bf1 + 0, bf1 + 15, clamp_lo, clamp_hi);
addsub_avx2(bf1[1], bf1[14], bf1 + 1, bf1 + 14, clamp_lo, clamp_hi);
addsub_avx2(bf1[2], bf1[13], bf1 + 2, bf1 + 13, clamp_lo, clamp_hi);
addsub_avx2(bf1[3], bf1[12], bf1 + 3, bf1 + 12, clamp_lo, clamp_hi);
addsub_avx2(bf1[4], bf1[11], bf1 + 4, bf1 + 11, clamp_lo, clamp_hi);
addsub_avx2(bf1[5], bf1[10], bf1 + 5, bf1 + 10, clamp_lo, clamp_hi);
addsub_avx2(bf1[6], bf1[9], bf1 + 6, bf1 + 9, clamp_lo, clamp_hi);
addsub_avx2(bf1[7], bf1[8], bf1 + 7, bf1 + 8, clamp_lo, clamp_hi);
temp1 = half_btf_avx2(cospim32, &bf1[20], cospi32, &bf1[27], rounding, bit);
bf1[27] = half_btf_avx2(cospi32, &bf1[20], cospi32, &bf1[27], rounding, bit);
bf1[20] = temp1;
temp2 = half_btf_avx2(cospim32, &bf1[21], cospi32, &bf1[26], rounding, bit);
bf1[26] = half_btf_avx2(cospi32, &bf1[21], cospi32, &bf1[26], rounding, bit);
bf1[21] = temp2;
temp1 = half_btf_avx2(cospim32, &bf1[22], cospi32, &bf1[25], rounding, bit);
bf1[25] = half_btf_avx2(cospi32, &bf1[22], cospi32, &bf1[25], rounding, bit);
bf1[22] = temp1;
temp2 = half_btf_avx2(cospim32, &bf1[23], cospi32, &bf1[24], rounding, bit);
bf1[24] = half_btf_avx2(cospi32, &bf1[23], cospi32, &bf1[24], rounding, bit);
bf1[23] = temp2;
}
static INLINE void idct32_stage9_avx2(__m256i *bf1, __m256i *out,
const int do_cols, const int bd,
const int out_shift,
const __m256i *clamp_lo,
const __m256i *clamp_hi) {
addsub_avx2(bf1[0], bf1[31], out + 0, out + 31, clamp_lo, clamp_hi);
addsub_avx2(bf1[1], bf1[30], out + 1, out + 30, clamp_lo, clamp_hi);
addsub_avx2(bf1[2], bf1[29], out + 2, out + 29, clamp_lo, clamp_hi);
addsub_avx2(bf1[3], bf1[28], out + 3, out + 28, clamp_lo, clamp_hi);
addsub_avx2(bf1[4], bf1[27], out + 4, out + 27, clamp_lo, clamp_hi);
addsub_avx2(bf1[5], bf1[26], out + 5, out + 26, clamp_lo, clamp_hi);
addsub_avx2(bf1[6], bf1[25], out + 6, out + 25, clamp_lo, clamp_hi);
addsub_avx2(bf1[7], bf1[24], out + 7, out + 24, clamp_lo, clamp_hi);
addsub_avx2(bf1[8], bf1[23], out + 8, out + 23, clamp_lo, clamp_hi);
addsub_avx2(bf1[9], bf1[22], out + 9, out + 22, clamp_lo, clamp_hi);
addsub_avx2(bf1[10], bf1[21], out + 10, out + 21, clamp_lo, clamp_hi);
addsub_avx2(bf1[11], bf1[20], out + 11, out + 20, clamp_lo, clamp_hi);
addsub_avx2(bf1[12], bf1[19], out + 12, out + 19, clamp_lo, clamp_hi);
addsub_avx2(bf1[13], bf1[18], out + 13, out + 18, clamp_lo, clamp_hi);
addsub_avx2(bf1[14], bf1[17], out + 14, out + 17, clamp_lo, clamp_hi);
addsub_avx2(bf1[15], bf1[16], out + 15, out + 16, clamp_lo, clamp_hi);
if (!do_cols) {
const int log_range_out = AOMMAX(16, bd + 6);
const __m256i clamp_lo_out = _mm256_set1_epi32(-(1 << (log_range_out - 1)));
const __m256i clamp_hi_out =
_mm256_set1_epi32((1 << (log_range_out - 1)) - 1);
round_shift_8x8_avx2(out, out_shift);
round_shift_8x8_avx2(out + 16, out_shift);
highbd_clamp_epi32_avx2(out, out, &clamp_lo_out, &clamp_hi_out, 32);
}
}
static void idct32_low1_avx2(__m256i *in, __m256i *out, int bit, int do_cols,
int bd, int out_shift) {
const int32_t *cospi = cospi_arr(bit);
const __m256i cospi32 = _mm256_set1_epi32(cospi[32]);
const __m256i rounding = _mm256_set1_epi32(1 << (bit - 1));
const int log_range = AOMMAX(16, bd + (do_cols ? 6 : 8));
__m256i clamp_lo = _mm256_set1_epi32(-(1 << (log_range - 1)));
__m256i clamp_hi = _mm256_set1_epi32((1 << (log_range - 1)) - 1);
__m256i x;
// stage 0
// stage 1
// stage 2
// stage 3
// stage 4
// stage 5
x = _mm256_mullo_epi32(in[0], cospi32);
x = _mm256_add_epi32(x, rounding);
x = _mm256_srai_epi32(x, bit);
// stage 6
// stage 7
// stage 8
// stage 9
if (!do_cols) {
const int log_range_out = AOMMAX(16, bd + 6);
__m256i offset = _mm256_set1_epi32((1 << out_shift) >> 1);
clamp_lo = _mm256_set1_epi32(-(1 << (log_range_out - 1)));
clamp_hi = _mm256_set1_epi32((1 << (log_range_out - 1)) - 1);
x = _mm256_add_epi32(offset, x);
x = _mm256_sra_epi32(x, _mm_cvtsi32_si128(out_shift));
}
x = _mm256_max_epi32(x, clamp_lo);
x = _mm256_min_epi32(x, clamp_hi);
out[0] = x;
out[1] = x;
out[2] = x;
out[3] = x;
out[4] = x;
out[5] = x;
out[6] = x;
out[7] = x;
out[8] = x;
out[9] = x;
out[10] = x;
out[11] = x;
out[12] = x;
out[13] = x;
out[14] = x;
out[15] = x;
out[16] = x;
out[17] = x;
out[18] = x;
out[19] = x;
out[20] = x;
out[21] = x;
out[22] = x;
out[23] = x;
out[24] = x;
out[25] = x;
out[26] = x;
out[27] = x;
out[28] = x;
out[29] = x;
out[30] = x;
out[31] = x;
}
static void idct32_low8_avx2(__m256i *in, __m256i *out, int bit, int do_cols,
int bd, int out_shift) {
const int32_t *cospi = cospi_arr(bit);
const __m256i cospi62 = _mm256_set1_epi32(cospi[62]);
const __m256i cospi14 = _mm256_set1_epi32(cospi[14]);
const __m256i cospi54 = _mm256_set1_epi32(cospi[54]);
const __m256i cospi6 = _mm256_set1_epi32(cospi[6]);
const __m256i cospi10 = _mm256_set1_epi32(cospi[10]);
const __m256i cospi2 = _mm256_set1_epi32(cospi[2]);
const __m256i cospim58 = _mm256_set1_epi32(-cospi[58]);
const __m256i cospim50 = _mm256_set1_epi32(-cospi[50]);
const __m256i cospi60 = _mm256_set1_epi32(cospi[60]);
const __m256i cospi12 = _mm256_set1_epi32(cospi[12]);
const __m256i cospi4 = _mm256_set1_epi32(cospi[4]);
const __m256i cospim52 = _mm256_set1_epi32(-cospi[52]);
const __m256i cospi56 = _mm256_set1_epi32(cospi[56]);
const __m256i cospi24 = _mm256_set1_epi32(cospi[24]);
const __m256i cospi40 = _mm256_set1_epi32(cospi[40]);
const __m256i cospi8 = _mm256_set1_epi32(cospi[8]);
const __m256i cospim40 = _mm256_set1_epi32(-cospi[40]);
const __m256i cospim8 = _mm256_set1_epi32(-cospi[8]);
const __m256i cospim56 = _mm256_set1_epi32(-cospi[56]);
const __m256i cospim24 = _mm256_set1_epi32(-cospi[24]);
const __m256i cospi32 = _mm256_set1_epi32(cospi[32]);
const __m256i cospim32 = _mm256_set1_epi32(-cospi[32]);
const __m256i cospi48 = _mm256_set1_epi32(cospi[48]);
const __m256i cospim48 = _mm256_set1_epi32(-cospi[48]);
const __m256i cospi16 = _mm256_set1_epi32(cospi[16]);
const __m256i cospim16 = _mm256_set1_epi32(-cospi[16]);
const __m256i rounding = _mm256_set1_epi32(1 << (bit - 1));
const int log_range = AOMMAX(16, bd + (do_cols ? 6 : 8));
const __m256i clamp_lo = _mm256_set1_epi32(-(1 << (log_range - 1)));
const __m256i clamp_hi = _mm256_set1_epi32((1 << (log_range - 1)) - 1);
__m256i bf1[32];
{
// stage 0
// stage 1
bf1[0] = in[0];
bf1[4] = in[4];
bf1[8] = in[2];
bf1[12] = in[6];
bf1[16] = in[1];
bf1[20] = in[5];
bf1[24] = in[3];
bf1[28] = in[7];
// stage 2
bf1[31] = half_btf_0_avx2(&cospi2, &bf1[16], &rounding, bit);
bf1[16] = half_btf_0_avx2(&cospi62, &bf1[16], &rounding, bit);
bf1[19] = half_btf_0_avx2(&cospim50, &bf1[28], &rounding, bit);
bf1[28] = half_btf_0_avx2(&cospi14, &bf1[28], &rounding, bit);
bf1[27] = half_btf_0_avx2(&cospi10, &bf1[20], &rounding, bit);
bf1[20] = half_btf_0_avx2(&cospi54, &bf1[20], &rounding, bit);
bf1[23] = half_btf_0_avx2(&cospim58, &bf1[24], &rounding, bit);
bf1[24] = half_btf_0_avx2(&cospi6, &bf1[24], &rounding, bit);
// stage 3
bf1[15] = half_btf_0_avx2(&cospi4, &bf1[8], &rounding, bit);
bf1[8] = half_btf_0_avx2(&cospi60, &bf1[8], &rounding, bit);
bf1[11] = half_btf_0_avx2(&cospim52, &bf1[12], &rounding, bit);
bf1[12] = half_btf_0_avx2(&cospi12, &bf1[12], &rounding, bit);
bf1[17] = bf1[16];
bf1[18] = bf1[19];
bf1[21] = bf1[20];
bf1[22] = bf1[23];
bf1[25] = bf1[24];
bf1[26] = bf1[27];
bf1[29] = bf1[28];
bf1[30] = bf1[31];
// stage 4
bf1[7] = half_btf_0_avx2(&cospi8, &bf1[4], &rounding, bit);
bf1[4] = half_btf_0_avx2(&cospi56, &bf1[4], &rounding, bit);
bf1[9] = bf1[8];
bf1[10] = bf1[11];
bf1[13] = bf1[12];
bf1[14] = bf1[15];
idct32_stage4_avx2(bf1, &cospim8, &cospi56, &cospi8, &cospim56, &cospim40,
&cospi24, &cospi40, &cospim24, &rounding, bit);
// stage 5
bf1[0] = half_btf_0_avx2(&cospi32, &bf1[0], &rounding, bit);
bf1[1] = bf1[0];
bf1[5] = bf1[4];
bf1[6] = bf1[7];
idct32_stage5_avx2(bf1, &cospim16, &cospi48, &cospi16, &cospim48, &clamp_lo,
&clamp_hi, &rounding, bit);
// stage 6
bf1[3] = bf1[0];
bf1[2] = bf1[1];
idct32_stage6_avx2(bf1, &cospim32, &cospi32, &cospim16, &cospi48, &cospi16,
&cospim48, &clamp_lo, &clamp_hi, &rounding, bit);
// stage 7
idct32_stage7_avx2(bf1, &cospim32, &cospi32, &clamp_lo, &clamp_hi,
&rounding, bit);
// stage 8
idct32_stage8_avx2(bf1, &cospim32, &cospi32, &clamp_lo, &clamp_hi,
&rounding, bit);
// stage 9
idct32_stage9_avx2(bf1, out, do_cols, bd, out_shift, &clamp_lo, &clamp_hi);
}
}
static void idct32_low16_avx2(__m256i *in, __m256i *out, int bit, int do_cols,
int bd, int out_shift) {
const int32_t *cospi = cospi_arr(bit);
const __m256i cospi62 = _mm256_set1_epi32(cospi[62]);
const __m256i cospi30 = _mm256_set1_epi32(cospi[30]);
const __m256i cospi46 = _mm256_set1_epi32(cospi[46]);
const __m256i cospi14 = _mm256_set1_epi32(cospi[14]);
const __m256i cospi54 = _mm256_set1_epi32(cospi[54]);
const __m256i cospi22 = _mm256_set1_epi32(cospi[22]);
const __m256i cospi38 = _mm256_set1_epi32(cospi[38]);
const __m256i cospi6 = _mm256_set1_epi32(cospi[6]);
const __m256i cospi26 = _mm256_set1_epi32(cospi[26]);
const __m256i cospi10 = _mm256_set1_epi32(cospi[10]);
const __m256i cospi18 = _mm256_set1_epi32(cospi[18]);
const __m256i cospi2 = _mm256_set1_epi32(cospi[2]);
const __m256i cospim58 = _mm256_set1_epi32(-cospi[58]);
const __m256i cospim42 = _mm256_set1_epi32(-cospi[42]);
const __m256i cospim50 = _mm256_set1_epi32(-cospi[50]);
const __m256i cospim34 = _mm256_set1_epi32(-cospi[34]);
const __m256i cospi60 = _mm256_set1_epi32(cospi[60]);
const __m256i cospi28 = _mm256_set1_epi32(cospi[28]);
const __m256i cospi44 = _mm256_set1_epi32(cospi[44]);
const __m256i cospi12 = _mm256_set1_epi32(cospi[12]);
const __m256i cospi20 = _mm256_set1_epi32(cospi[20]);
const __m256i cospi4 = _mm256_set1_epi32(cospi[4]);
const __m256i cospim52 = _mm256_set1_epi32(-cospi[52]);
const __m256i cospim36 = _mm256_set1_epi32(-cospi[36]);
const __m256i cospi56 = _mm256_set1_epi32(cospi[56]);
const __m256i cospi24 = _mm256_set1_epi32(cospi[24]);
const __m256i cospi40 = _mm256_set1_epi32(cospi[40]);
const __m256i cospi8 = _mm256_set1_epi32(cospi[8]);
const __m256i cospim40 = _mm256_set1_epi32(-cospi[40]);
const __m256i cospim8 = _mm256_set1_epi32(-cospi[8]);
const __m256i cospim56 = _mm256_set1_epi32(-cospi[56]);
const __m256i cospim24 = _mm256_set1_epi32(-cospi[24]);
const __m256i cospi32 = _mm256_set1_epi32(cospi[32]);
const __m256i cospim32 = _mm256_set1_epi32(-cospi[32]);
const __m256i cospi48 = _mm256_set1_epi32(cospi[48]);
const __m256i cospim48 = _mm256_set1_epi32(-cospi[48]);
const __m256i cospi16 = _mm256_set1_epi32(cospi[16]);
const __m256i cospim16 = _mm256_set1_epi32(-cospi[16]);
const __m256i rounding = _mm256_set1_epi32(1 << (bit - 1));
const int log_range = AOMMAX(16, bd + (do_cols ? 6 : 8));
const __m256i clamp_lo = _mm256_set1_epi32(-(1 << (log_range - 1)));
const __m256i clamp_hi = _mm256_set1_epi32((1 << (log_range - 1)) - 1);
__m256i bf1[32];
{
// stage 0
// stage 1
bf1[0] = in[0];
bf1[2] = in[8];
bf1[4] = in[4];
bf1[6] = in[12];
bf1[8] = in[2];
bf1[10] = in[10];
bf1[12] = in[6];
bf1[14] = in[14];
bf1[16] = in[1];
bf1[18] = in[9];
bf1[20] = in[5];
bf1[22] = in[13];
bf1[24] = in[3];
bf1[26] = in[11];
bf1[28] = in[7];
bf1[30] = in[15];
// stage 2
bf1[31] = half_btf_0_avx2(&cospi2, &bf1[16], &rounding, bit);
bf1[16] = half_btf_0_avx2(&cospi62, &bf1[16], &rounding, bit);
bf1[17] = half_btf_0_avx2(&cospim34, &bf1[30], &rounding, bit);
bf1[30] = half_btf_0_avx2(&cospi30, &bf1[30], &rounding, bit);
bf1[29] = half_btf_0_avx2(&cospi18, &bf1[18], &rounding, bit);
bf1[18] = half_btf_0_avx2(&cospi46, &bf1[18], &rounding, bit);
bf1[19] = half_btf_0_avx2(&cospim50, &bf1[28], &rounding, bit);
bf1[28] = half_btf_0_avx2(&cospi14, &bf1[28], &rounding, bit);
bf1[27] = half_btf_0_avx2(&cospi10, &bf1[20], &rounding, bit);
bf1[20] = half_btf_0_avx2(&cospi54, &bf1[20], &rounding, bit);
bf1[21] = half_btf_0_avx2(&cospim42, &bf1[26], &rounding, bit);
bf1[26] = half_btf_0_avx2(&cospi22, &bf1[26], &rounding, bit);
bf1[25] = half_btf_0_avx2(&cospi26, &bf1[22], &rounding, bit);
bf1[22] = half_btf_0_avx2(&cospi38, &bf1[22], &rounding, bit);
bf1[23] = half_btf_0_avx2(&cospim58, &bf1[24], &rounding, bit);
bf1[24] = half_btf_0_avx2(&cospi6, &bf1[24], &rounding, bit);
// stage 3
bf1[15] = half_btf_0_avx2(&cospi4, &bf1[8], &rounding, bit);
bf1[8] = half_btf_0_avx2(&cospi60, &bf1[8], &rounding, bit);
bf1[9] = half_btf_0_avx2(&cospim36, &bf1[14], &rounding, bit);
bf1[14] = half_btf_0_avx2(&cospi28, &bf1[14], &rounding, bit);
bf1[13] = half_btf_0_avx2(&cospi20, &bf1[10], &rounding, bit);
bf1[10] = half_btf_0_avx2(&cospi44, &bf1[10], &rounding, bit);
bf1[11] = half_btf_0_avx2(&cospim52, &bf1[12], &rounding, bit);
bf1[12] = half_btf_0_avx2(&cospi12, &bf1[12], &rounding, bit);
addsub_avx2(bf1[16], bf1[17], bf1 + 16, bf1 + 17, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[19], bf1[18], bf1 + 19, bf1 + 18, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[20], bf1[21], bf1 + 20, bf1 + 21, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[23], bf1[22], bf1 + 23, bf1 + 22, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[24], bf1[25], bf1 + 24, bf1 + 25, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[27], bf1[26], bf1 + 27, bf1 + 26, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[28], bf1[29], bf1 + 28, bf1 + 29, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[31], bf1[30], bf1 + 31, bf1 + 30, &clamp_lo, &clamp_hi);
// stage 4
bf1[7] = half_btf_0_avx2(&cospi8, &bf1[4], &rounding, bit);
bf1[4] = half_btf_0_avx2(&cospi56, &bf1[4], &rounding, bit);
bf1[5] = half_btf_0_avx2(&cospim40, &bf1[6], &rounding, bit);
bf1[6] = half_btf_0_avx2(&cospi24, &bf1[6], &rounding, bit);
addsub_avx2(bf1[8], bf1[9], bf1 + 8, bf1 + 9, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[11], bf1[10], bf1 + 11, bf1 + 10, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[12], bf1[13], bf1 + 12, bf1 + 13, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[15], bf1[14], bf1 + 15, bf1 + 14, &clamp_lo, &clamp_hi);
idct32_stage4_avx2(bf1, &cospim8, &cospi56, &cospi8, &cospim56, &cospim40,
&cospi24, &cospi40, &cospim24, &rounding, bit);
// stage 5
bf1[0] = half_btf_0_avx2(&cospi32, &bf1[0], &rounding, bit);
bf1[1] = bf1[0];
bf1[3] = half_btf_0_avx2(&cospi16, &bf1[2], &rounding, bit);
bf1[2] = half_btf_0_avx2(&cospi48, &bf1[2], &rounding, bit);
addsub_avx2(bf1[4], bf1[5], bf1 + 4, bf1 + 5, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[7], bf1[6], bf1 + 7, bf1 + 6, &clamp_lo, &clamp_hi);
idct32_stage5_avx2(bf1, &cospim16, &cospi48, &cospi16, &cospim48, &clamp_lo,
&clamp_hi, &rounding, bit);
// stage 6
addsub_avx2(bf1[0], bf1[3], bf1 + 0, bf1 + 3, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[1], bf1[2], bf1 + 1, bf1 + 2, &clamp_lo, &clamp_hi);
idct32_stage6_avx2(bf1, &cospim32, &cospi32, &cospim16, &cospi48, &cospi16,
&cospim48, &clamp_lo, &clamp_hi, &rounding, bit);
// stage 7
idct32_stage7_avx2(bf1, &cospim32, &cospi32, &clamp_lo, &clamp_hi,
&rounding, bit);
// stage 8
idct32_stage8_avx2(bf1, &cospim32, &cospi32, &clamp_lo, &clamp_hi,
&rounding, bit);
// stage 9
idct32_stage9_avx2(bf1, out, do_cols, bd, out_shift, &clamp_lo, &clamp_hi);
}
}
static void idct32_avx2(__m256i *in, __m256i *out, int bit, int do_cols, int bd,
int out_shift) {
const int32_t *cospi = cospi_arr(bit);
const __m256i cospi62 = _mm256_set1_epi32(cospi[62]);
const __m256i cospi30 = _mm256_set1_epi32(cospi[30]);
const __m256i cospi46 = _mm256_set1_epi32(cospi[46]);
const __m256i cospi14 = _mm256_set1_epi32(cospi[14]);
const __m256i cospi54 = _mm256_set1_epi32(cospi[54]);
const __m256i cospi22 = _mm256_set1_epi32(cospi[22]);
const __m256i cospi38 = _mm256_set1_epi32(cospi[38]);
const __m256i cospi6 = _mm256_set1_epi32(cospi[6]);
const __m256i cospi58 = _mm256_set1_epi32(cospi[58]);
const __m256i cospi26 = _mm256_set1_epi32(cospi[26]);
const __m256i cospi42 = _mm256_set1_epi32(cospi[42]);
const __m256i cospi10 = _mm256_set1_epi32(cospi[10]);
const __m256i cospi50 = _mm256_set1_epi32(cospi[50]);
const __m256i cospi18 = _mm256_set1_epi32(cospi[18]);
const __m256i cospi34 = _mm256_set1_epi32(cospi[34]);
const __m256i cospi2 = _mm256_set1_epi32(cospi[2]);
const __m256i cospim58 = _mm256_set1_epi32(-cospi[58]);
const __m256i cospim26 = _mm256_set1_epi32(-cospi[26]);
const __m256i cospim42 = _mm256_set1_epi32(-cospi[42]);
const __m256i cospim10 = _mm256_set1_epi32(-cospi[10]);
const __m256i cospim50 = _mm256_set1_epi32(-cospi[50]);
const __m256i cospim18 = _mm256_set1_epi32(-cospi[18]);
const __m256i cospim34 = _mm256_set1_epi32(-cospi[34]);
const __m256i cospim2 = _mm256_set1_epi32(-cospi[2]);
const __m256i cospi60 = _mm256_set1_epi32(cospi[60]);
const __m256i cospi28 = _mm256_set1_epi32(cospi[28]);
const __m256i cospi44 = _mm256_set1_epi32(cospi[44]);
const __m256i cospi12 = _mm256_set1_epi32(cospi[12]);
const __m256i cospi52 = _mm256_set1_epi32(cospi[52]);
const __m256i cospi20 = _mm256_set1_epi32(cospi[20]);
const __m256i cospi36 = _mm256_set1_epi32(cospi[36]);
const __m256i cospi4 = _mm256_set1_epi32(cospi[4]);
const __m256i cospim52 = _mm256_set1_epi32(-cospi[52]);
const __m256i cospim20 = _mm256_set1_epi32(-cospi[20]);
const __m256i cospim36 = _mm256_set1_epi32(-cospi[36]);
const __m256i cospim4 = _mm256_set1_epi32(-cospi[4]);
const __m256i cospi56 = _mm256_set1_epi32(cospi[56]);
const __m256i cospi24 = _mm256_set1_epi32(cospi[24]);
const __m256i cospi40 = _mm256_set1_epi32(cospi[40]);
const __m256i cospi8 = _mm256_set1_epi32(cospi[8]);
const __m256i cospim40 = _mm256_set1_epi32(-cospi[40]);
const __m256i cospim8 = _mm256_set1_epi32(-cospi[8]);
const __m256i cospim56 = _mm256_set1_epi32(-cospi[56]);
const __m256i cospim24 = _mm256_set1_epi32(-cospi[24]);
const __m256i cospi32 = _mm256_set1_epi32(cospi[32]);
const __m256i cospim32 = _mm256_set1_epi32(-cospi[32]);
const __m256i cospi48 = _mm256_set1_epi32(cospi[48]);
const __m256i cospim48 = _mm256_set1_epi32(-cospi[48]);
const __m256i cospi16 = _mm256_set1_epi32(cospi[16]);
const __m256i cospim16 = _mm256_set1_epi32(-cospi[16]);
const __m256i rounding = _mm256_set1_epi32(1 << (bit - 1));
const int log_range = AOMMAX(16, bd + (do_cols ? 6 : 8));
const __m256i clamp_lo = _mm256_set1_epi32(-(1 << (log_range - 1)));
const __m256i clamp_hi = _mm256_set1_epi32((1 << (log_range - 1)) - 1);
__m256i bf1[32], bf0[32];
{
// stage 0
// stage 1
bf1[0] = in[0];
bf1[1] = in[16];
bf1[2] = in[8];
bf1[3] = in[24];
bf1[4] = in[4];
bf1[5] = in[20];
bf1[6] = in[12];
bf1[7] = in[28];
bf1[8] = in[2];
bf1[9] = in[18];
bf1[10] = in[10];
bf1[11] = in[26];
bf1[12] = in[6];
bf1[13] = in[22];
bf1[14] = in[14];
bf1[15] = in[30];
bf1[16] = in[1];
bf1[17] = in[17];
bf1[18] = in[9];
bf1[19] = in[25];
bf1[20] = in[5];
bf1[21] = in[21];
bf1[22] = in[13];
bf1[23] = in[29];
bf1[24] = in[3];
bf1[25] = in[19];
bf1[26] = in[11];
bf1[27] = in[27];
bf1[28] = in[7];
bf1[29] = in[23];
bf1[30] = in[15];
bf1[31] = in[31];
// stage 2
bf0[0] = bf1[0];
bf0[1] = bf1[1];
bf0[2] = bf1[2];
bf0[3] = bf1[3];
bf0[4] = bf1[4];
bf0[5] = bf1[5];
bf0[6] = bf1[6];
bf0[7] = bf1[7];
bf0[8] = bf1[8];
bf0[9] = bf1[9];
bf0[10] = bf1[10];
bf0[11] = bf1[11];
bf0[12] = bf1[12];
bf0[13] = bf1[13];
bf0[14] = bf1[14];
bf0[15] = bf1[15];
bf0[16] =
half_btf_avx2(&cospi62, &bf1[16], &cospim2, &bf1[31], &rounding, bit);
bf0[17] =
half_btf_avx2(&cospi30, &bf1[17], &cospim34, &bf1[30], &rounding, bit);
bf0[18] =
half_btf_avx2(&cospi46, &bf1[18], &cospim18, &bf1[29], &rounding, bit);
bf0[19] =
half_btf_avx2(&cospi14, &bf1[19], &cospim50, &bf1[28], &rounding, bit);
bf0[20] =
half_btf_avx2(&cospi54, &bf1[20], &cospim10, &bf1[27], &rounding, bit);
bf0[21] =
half_btf_avx2(&cospi22, &bf1[21], &cospim42, &bf1[26], &rounding, bit);
bf0[22] =
half_btf_avx2(&cospi38, &bf1[22], &cospim26, &bf1[25], &rounding, bit);
bf0[23] =
half_btf_avx2(&cospi6, &bf1[23], &cospim58, &bf1[24], &rounding, bit);
bf0[24] =
half_btf_avx2(&cospi58, &bf1[23], &cospi6, &bf1[24], &rounding, bit);
bf0[25] =
half_btf_avx2(&cospi26, &bf1[22], &cospi38, &bf1[25], &rounding, bit);
bf0[26] =
half_btf_avx2(&cospi42, &bf1[21], &cospi22, &bf1[26], &rounding, bit);
bf0[27] =
half_btf_avx2(&cospi10, &bf1[20], &cospi54, &bf1[27], &rounding, bit);
bf0[28] =
half_btf_avx2(&cospi50, &bf1[19], &cospi14, &bf1[28], &rounding, bit);
bf0[29] =
half_btf_avx2(&cospi18, &bf1[18], &cospi46, &bf1[29], &rounding, bit);
bf0[30] =
half_btf_avx2(&cospi34, &bf1[17], &cospi30, &bf1[30], &rounding, bit);
bf0[31] =
half_btf_avx2(&cospi2, &bf1[16], &cospi62, &bf1[31], &rounding, bit);
// stage 3
bf1[0] = bf0[0];
bf1[1] = bf0[1];
bf1[2] = bf0[2];
bf1[3] = bf0[3];
bf1[4] = bf0[4];
bf1[5] = bf0[5];
bf1[6] = bf0[6];
bf1[7] = bf0[7];
bf1[8] =
half_btf_avx2(&cospi60, &bf0[8], &cospim4, &bf0[15], &rounding, bit);
bf1[9] =
half_btf_avx2(&cospi28, &bf0[9], &cospim36, &bf0[14], &rounding, bit);
bf1[10] =
half_btf_avx2(&cospi44, &bf0[10], &cospim20, &bf0[13], &rounding, bit);
bf1[11] =
half_btf_avx2(&cospi12, &bf0[11], &cospim52, &bf0[12], &rounding, bit);
bf1[12] =
half_btf_avx2(&cospi52, &bf0[11], &cospi12, &bf0[12], &rounding, bit);
bf1[13] =
half_btf_avx2(&cospi20, &bf0[10], &cospi44, &bf0[13], &rounding, bit);
bf1[14] =
half_btf_avx2(&cospi36, &bf0[9], &cospi28, &bf0[14], &rounding, bit);
bf1[15] =
half_btf_avx2(&cospi4, &bf0[8], &cospi60, &bf0[15], &rounding, bit);
addsub_avx2(bf0[16], bf0[17], bf1 + 16, bf1 + 17, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[19], bf0[18], bf1 + 19, bf1 + 18, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[20], bf0[21], bf1 + 20, bf1 + 21, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[23], bf0[22], bf1 + 23, bf1 + 22, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[24], bf0[25], bf1 + 24, bf1 + 25, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[27], bf0[26], bf1 + 27, bf1 + 26, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[28], bf0[29], bf1 + 28, bf1 + 29, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[31], bf0[30], bf1 + 31, bf1 + 30, &clamp_lo, &clamp_hi);
// stage 4
bf0[0] = bf1[0];
bf0[1] = bf1[1];
bf0[2] = bf1[2];
bf0[3] = bf1[3];
bf0[4] =
half_btf_avx2(&cospi56, &bf1[4], &cospim8, &bf1[7], &rounding, bit);
bf0[5] =
half_btf_avx2(&cospi24, &bf1[5], &cospim40, &bf1[6], &rounding, bit);
bf0[6] =
half_btf_avx2(&cospi40, &bf1[5], &cospi24, &bf1[6], &rounding, bit);
bf0[7] = half_btf_avx2(&cospi8, &bf1[4], &cospi56, &bf1[7], &rounding, bit);
addsub_avx2(bf1[8], bf1[9], bf0 + 8, bf0 + 9, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[11], bf1[10], bf0 + 11, bf0 + 10, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[12], bf1[13], bf0 + 12, bf0 + 13, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[15], bf1[14], bf0 + 15, bf0 + 14, &clamp_lo, &clamp_hi);
bf0[16] = bf1[16];
bf0[17] =
half_btf_avx2(&cospim8, &bf1[17], &cospi56, &bf1[30], &rounding, bit);
bf0[18] =
half_btf_avx2(&cospim56, &bf1[18], &cospim8, &bf1[29], &rounding, bit);
bf0[19] = bf1[19];
bf0[20] = bf1[20];
bf0[21] =
half_btf_avx2(&cospim40, &bf1[21], &cospi24, &bf1[26], &rounding, bit);
bf0[22] =
half_btf_avx2(&cospim24, &bf1[22], &cospim40, &bf1[25], &rounding, bit);
bf0[23] = bf1[23];
bf0[24] = bf1[24];
bf0[25] =
half_btf_avx2(&cospim40, &bf1[22], &cospi24, &bf1[25], &rounding, bit);
bf0[26] =
half_btf_avx2(&cospi24, &bf1[21], &cospi40, &bf1[26], &rounding, bit);
bf0[27] = bf1[27];
bf0[28] = bf1[28];
bf0[29] =
half_btf_avx2(&cospim8, &bf1[18], &cospi56, &bf1[29], &rounding, bit);
bf0[30] =
half_btf_avx2(&cospi56, &bf1[17], &cospi8, &bf1[30], &rounding, bit);
bf0[31] = bf1[31];
// stage 5
bf1[0] =
half_btf_avx2(&cospi32, &bf0[0], &cospi32, &bf0[1], &rounding, bit);
bf1[1] =
half_btf_avx2(&cospi32, &bf0[0], &cospim32, &bf0[1], &rounding, bit);
bf1[2] =
half_btf_avx2(&cospi48, &bf0[2], &cospim16, &bf0[3], &rounding, bit);
bf1[3] =
half_btf_avx2(&cospi16, &bf0[2], &cospi48, &bf0[3], &rounding, bit);
addsub_avx2(bf0[4], bf0[5], bf1 + 4, bf1 + 5, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[7], bf0[6], bf1 + 7, bf1 + 6, &clamp_lo, &clamp_hi);
bf1[8] = bf0[8];
bf1[9] =
half_btf_avx2(&cospim16, &bf0[9], &cospi48, &bf0[14], &rounding, bit);
bf1[10] =
half_btf_avx2(&cospim48, &bf0[10], &cospim16, &bf0[13], &rounding, bit);
bf1[11] = bf0[11];
bf1[12] = bf0[12];
bf1[13] =
half_btf_avx2(&cospim16, &bf0[10], &cospi48, &bf0[13], &rounding, bit);
bf1[14] =
half_btf_avx2(&cospi48, &bf0[9], &cospi16, &bf0[14], &rounding, bit);
bf1[15] = bf0[15];
addsub_avx2(bf0[16], bf0[19], bf1 + 16, bf1 + 19, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[17], bf0[18], bf1 + 17, bf1 + 18, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[23], bf0[20], bf1 + 23, bf1 + 20, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[22], bf0[21], bf1 + 22, bf1 + 21, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[24], bf0[27], bf1 + 24, bf1 + 27, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[25], bf0[26], bf1 + 25, bf1 + 26, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[31], bf0[28], bf1 + 31, bf1 + 28, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[30], bf0[29], bf1 + 30, bf1 + 29, &clamp_lo, &clamp_hi);
// stage 6
addsub_avx2(bf1[0], bf1[3], bf0 + 0, bf0 + 3, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[1], bf1[2], bf0 + 1, bf0 + 2, &clamp_lo, &clamp_hi);
bf0[4] = bf1[4];
bf0[5] =
half_btf_avx2(&cospim32, &bf1[5], &cospi32, &bf1[6], &rounding, bit);
bf0[6] =
half_btf_avx2(&cospi32, &bf1[5], &cospi32, &bf1[6], &rounding, bit);
bf0[7] = bf1[7];
addsub_avx2(bf1[8], bf1[11], bf0 + 8, bf0 + 11, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[9], bf1[10], bf0 + 9, bf0 + 10, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[15], bf1[12], bf0 + 15, bf0 + 12, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[14], bf1[13], bf0 + 14, bf0 + 13, &clamp_lo, &clamp_hi);
bf0[16] = bf1[16];
bf0[17] = bf1[17];
bf0[18] =
half_btf_avx2(&cospim16, &bf1[18], &cospi48, &bf1[29], &rounding, bit);
bf0[19] =
half_btf_avx2(&cospim16, &bf1[19], &cospi48, &bf1[28], &rounding, bit);
bf0[20] =
half_btf_avx2(&cospim48, &bf1[20], &cospim16, &bf1[27], &rounding, bit);
bf0[21] =
half_btf_avx2(&cospim48, &bf1[21], &cospim16, &bf1[26], &rounding, bit);
bf0[22] = bf1[22];
bf0[23] = bf1[23];
bf0[24] = bf1[24];
bf0[25] = bf1[25];
bf0[26] =
half_btf_avx2(&cospim16, &bf1[21], &cospi48, &bf1[26], &rounding, bit);
bf0[27] =
half_btf_avx2(&cospim16, &bf1[20], &cospi48, &bf1[27], &rounding, bit);
bf0[28] =
half_btf_avx2(&cospi48, &bf1[19], &cospi16, &bf1[28], &rounding, bit);
bf0[29] =
half_btf_avx2(&cospi48, &bf1[18], &cospi16, &bf1[29], &rounding, bit);
bf0[30] = bf1[30];
bf0[31] = bf1[31];
// stage 7
addsub_avx2(bf0[0], bf0[7], bf1 + 0, bf1 + 7, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[1], bf0[6], bf1 + 1, bf1 + 6, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[2], bf0[5], bf1 + 2, bf1 + 5, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[3], bf0[4], bf1 + 3, bf1 + 4, &clamp_lo, &clamp_hi);
bf1[8] = bf0[8];
bf1[9] = bf0[9];
bf1[10] =
half_btf_avx2(&cospim32, &bf0[10], &cospi32, &bf0[13], &rounding, bit);
bf1[11] =
half_btf_avx2(&cospim32, &bf0[11], &cospi32, &bf0[12], &rounding, bit);
bf1[12] =
half_btf_avx2(&cospi32, &bf0[11], &cospi32, &bf0[12], &rounding, bit);
bf1[13] =
half_btf_avx2(&cospi32, &bf0[10], &cospi32, &bf0[13], &rounding, bit);
bf1[14] = bf0[14];
bf1[15] = bf0[15];
addsub_avx2(bf0[16], bf0[23], bf1 + 16, bf1 + 23, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[17], bf0[22], bf1 + 17, bf1 + 22, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[18], bf0[21], bf1 + 18, bf1 + 21, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[19], bf0[20], bf1 + 19, bf1 + 20, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[31], bf0[24], bf1 + 31, bf1 + 24, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[30], bf0[25], bf1 + 30, bf1 + 25, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[29], bf0[26], bf1 + 29, bf1 + 26, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[28], bf0[27], bf1 + 28, bf1 + 27, &clamp_lo, &clamp_hi);
// stage 8
addsub_avx2(bf1[0], bf1[15], bf0 + 0, bf0 + 15, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[1], bf1[14], bf0 + 1, bf0 + 14, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[2], bf1[13], bf0 + 2, bf0 + 13, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[3], bf1[12], bf0 + 3, bf0 + 12, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[4], bf1[11], bf0 + 4, bf0 + 11, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[5], bf1[10], bf0 + 5, bf0 + 10, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[6], bf1[9], bf0 + 6, bf0 + 9, &clamp_lo, &clamp_hi);
addsub_avx2(bf1[7], bf1[8], bf0 + 7, bf0 + 8, &clamp_lo, &clamp_hi);
bf0[16] = bf1[16];
bf0[17] = bf1[17];
bf0[18] = bf1[18];
bf0[19] = bf1[19];
bf0[20] =
half_btf_avx2(&cospim32, &bf1[20], &cospi32, &bf1[27], &rounding, bit);
bf0[21] =
half_btf_avx2(&cospim32, &bf1[21], &cospi32, &bf1[26], &rounding, bit);
bf0[22] =
half_btf_avx2(&cospim32, &bf1[22], &cospi32, &bf1[25], &rounding, bit);
bf0[23] =
half_btf_avx2(&cospim32, &bf1[23], &cospi32, &bf1[24], &rounding, bit);
bf0[24] =
half_btf_avx2(&cospi32, &bf1[23], &cospi32, &bf1[24], &rounding, bit);
bf0[25] =
half_btf_avx2(&cospi32, &bf1[22], &cospi32, &bf1[25], &rounding, bit);
bf0[26] =
half_btf_avx2(&cospi32, &bf1[21], &cospi32, &bf1[26], &rounding, bit);
bf0[27] =
half_btf_avx2(&cospi32, &bf1[20], &cospi32, &bf1[27], &rounding, bit);
bf0[28] = bf1[28];
bf0[29] = bf1[29];
bf0[30] = bf1[30];
bf0[31] = bf1[31];
// stage 9
addsub_avx2(bf0[0], bf0[31], out + 0, out + 31, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[1], bf0[30], out + 1, out + 30, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[2], bf0[29], out + 2, out + 29, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[3], bf0[28], out + 3, out + 28, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[4], bf0[27], out + 4, out + 27, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[5], bf0[26], out + 5, out + 26, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[6], bf0[25], out + 6, out + 25, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[7], bf0[24], out + 7, out + 24, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[8], bf0[23], out + 8, out + 23, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[9], bf0[22], out + 9, out + 22, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[10], bf0[21], out + 10, out + 21, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[11], bf0[20], out + 11, out + 20, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[12], bf0[19], out + 12, out + 19, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[13], bf0[18], out + 13, out + 18, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[14], bf0[17], out + 14, out + 17, &clamp_lo, &clamp_hi);
addsub_avx2(bf0[15], bf0[16], out + 15, out + 16, &clamp_lo, &clamp_hi);
if (!do_cols) {
const int log_range_out = AOMMAX(16, bd + 6);
const __m256i clamp_lo_out =
_mm256_set1_epi32(-(1 << (log_range_out - 1)));
const __m256i clamp_hi_out =
_mm256_set1_epi32((1 << (log_range_out - 1)) - 1);
round_shift_8x8_avx2(out, out_shift);
round_shift_8x8_avx2(out + 16, out_shift);
highbd_clamp_epi32_avx2(out, out, &clamp_lo_out, &clamp_hi_out, 32);
}
}
}
static void idct16_low1_avx2(__m256i *in, __m256i *out, int bit, int do_cols,
int bd, int out_shift) {
const int32_t *cospi = cospi_arr(bit);
const __m256i cospi32 = _mm256_set1_epi32(cospi[32]);
const __m256i rnding = _mm256_set1_epi32(1 << (bit - 1));
const int log_range = AOMMAX(16, bd + (do_cols ? 6 : 8));
__m256i clamp_lo = _mm256_set1_epi32(-(1 << (log_range - 1)));
__m256i clamp_hi = _mm256_set1_epi32((1 << (log_range - 1)) - 1);
{
// stage 0
// stage 1
// stage 2
// stage 3
// stage 4
in[0] = _mm256_mullo_epi32(in[0], cospi32);
in[0] = _mm256_add_epi32(in[0], rnding);
in[0] = _mm256_srai_epi32(in[0], bit);
// stage 5
// stage 6
// stage 7
if (!do_cols) {
const int log_range_out = AOMMAX(16, bd + 6);
clamp_lo = _mm256_set1_epi32(-(1 << (log_range_out - 1)));
clamp_hi = _mm256_set1_epi32((1 << (log_range_out - 1)) - 1);
__m256i offset = _mm256_set1_epi32((1 << out_shift) >> 1);
in[0] = _mm256_add_epi32(in[0], offset);
in[0] = _mm256_sra_epi32(in[0], _mm_cvtsi32_si128(out_shift));
}
in[0] = _mm256_max_epi32(in[0], clamp_lo);
in[0] = _mm256_min_epi32(in[0], clamp_hi);
out[0] = in[0];
out[1] = in[0];
out[2] = in[0];
out[3] = in[0];
out[4] = in[0];
out[5] = in[0];
out[6] = in[0];
out[7] = in[0];
out[8] = in[0];
out[9] = in[0];
out[10] = in[0];
out[11] = in[0];
out[12] = in[0];
out[13] = in[0];
out[14] = in[0];
out[15] = in[0];
}
}
static void idct16_low8_avx2(__m256i *in, __m256i *out, int bit, int do_cols,
int bd, int out_shift) {
const int32_t *cospi = cospi_arr(bit);
const __m256i cospi60 = _mm256_set1_epi32(cospi[60]);
const __m256i cospi28 = _mm256_set1_epi32(cospi[28]);
const __m256i cospi44 = _mm256_set1_epi32(cospi[44]);
const __m256i cospi20 = _mm256_set1_epi32(cospi[20]);
const __m256i cospi12 = _mm256_set1_epi32(cospi[12]);
const __m256i cospi4 = _mm256_set1_epi32(cospi[4]);
const __m256i cospi56 = _mm256_set1_epi32(cospi[56]);
const __m256i cospi24 = _mm256_set1_epi32(cospi[24]);
const __m256i cospim40 = _mm256_set1_epi32(-cospi[40]);
const __m256i cospi8 = _mm256_set1_epi32(cospi[8]);
const __m256i cospi32 = _mm256_set1_epi32(cospi[32]);
const __m256i cospi48 = _mm256_set1_epi32(cospi[48]);
const __m256i cospi16 = _mm256_set1_epi32(cospi[16]);
const __m256i cospim16 = _mm256_set1_epi32(-cospi[16]);
const __m256i cospim48 = _mm256_set1_epi32(-cospi[48]);
const __m256i cospim36 = _mm256_set1_epi32(-cospi[36]);
const __m256i cospim52 = _mm256_set1_epi32(-cospi[52]);
const __m256i rnding = _mm256_set1_epi32(1 << (bit - 1));
const int log_range = AOMMAX(16, bd + (do_cols ? 6 : 8));
const __m256i clamp_lo = _mm256_set1_epi32(-(1 << (log_range - 1)));
const __m256i clamp_hi = _mm256_set1_epi32((1 << (log_range - 1)) - 1);
__m256i u[16], x, y;
{
// stage 0
// stage 1
u[0] = in[0];
u[2] = in[4];
u[4] = in[2];
u[6] = in[6];
u[8] = in[1];
u[10] = in[5];
u[12] = in[3];
u[14] = in[7];
// stage 2
u[15] = half_btf_0_avx2(&cospi4, &u[8], &rnding, bit);
u[8] = half_btf_0_avx2(&cospi60, &u[8], &rnding, bit);
u[9] = half_btf_0_avx2(&cospim36, &u[14], &rnding, bit);
u[14] = half_btf_0_avx2(&cospi28, &u[14], &rnding, bit);
u[13] = half_btf_0_avx2(&cospi20, &u[10], &rnding, bit);
u[10] = half_btf_0_avx2(&cospi44, &u[10], &rnding, bit);
u[11] = half_btf_0_avx2(&cospim52, &u[12], &rnding, bit);
u[12] = half_btf_0_avx2(&cospi12, &u[12], &rnding, bit);
// stage 3
u[7] = half_btf_0_avx2(&cospi8, &u[4], &rnding, bit);
u[4] = half_btf_0_avx2(&cospi56, &u[4], &rnding, bit);
u[5] = half_btf_0_avx2(&cospim40, &u[6], &rnding, bit);
u[6] = half_btf_0_avx2(&cospi24, &u[6], &rnding, bit);
addsub_avx2(u[8], u[9], &u[8], &u[9], &clamp_lo, &clamp_hi);
addsub_avx2(u[11], u[10], &u[11], &u[10], &clamp_lo, &clamp_hi);
addsub_avx2(u[12], u[13], &u[12], &u[13], &clamp_lo, &clamp_hi);
addsub_avx2(u[15], u[14], &u[15], &u[14], &clamp_lo, &clamp_hi);
// stage 4
x = _mm256_mullo_epi32(u[0], cospi32);
u[0] = _mm256_add_epi32(x, rnding);
u[0] = _mm256_srai_epi32(u[0], bit);
u[1] = u[0];
u[3] = half_btf_0_avx2(&cospi16, &u[2], &rnding, bit);
u[2] = half_btf_0_avx2(&cospi48, &u[2], &rnding, bit);
addsub_avx2(u[4], u[5], &u[4], &u[5], &clamp_lo, &clamp_hi);
addsub_avx2(u[7], u[6], &u[7], &u[6], &clamp_lo, &clamp_hi);
x = half_btf_avx2(&cospim16, &u[9], &cospi48, &u[14], &rnding, bit);
u[14] = half_btf_avx2(&cospi48, &u[9], &cospi16, &u[14], &rnding, bit);
u[9] = x;
y = half_btf_avx2(&cospim48, &u[10], &cospim16, &u[13], &rnding, bit);
u[13] = half_btf_avx2(&cospim16, &u[10], &cospi48, &u[13], &rnding, bit);
u[10] = y;
// stage 5
addsub_avx2(u[0], u[3], &u[0], &u[3], &clamp_lo, &clamp_hi);
addsub_avx2(u[1], u[2], &u[1], &u[2], &clamp_lo, &clamp_hi);
x = _mm256_mullo_epi32(u[5], cospi32);
y = _mm256_mullo_epi32(u[6], cospi32);
u[5] = _mm256_sub_epi32(y, x);
u[5] = _mm256_add_epi32(u[5], rnding);
u[5] = _mm256_srai_epi32(u[5], bit);
u[6] = _mm256_add_epi32(y, x);
u[6] = _mm256_add_epi32(u[6], rnding);
u[6] = _mm256_srai_epi32(u[6], bit);
addsub_avx2(u[8], u[11], &u[8], &u[11], &clamp_lo, &clamp_hi);
addsub_avx2(u[9], u[10], &u[9], &u[10], &clamp_lo, &clamp_hi);
addsub_avx2(u[15], u[12], &u[15], &u[12], &clamp_lo, &clamp_hi);
addsub_avx2(u[14], u[13], &u[14], &u[13], &clamp_lo, &clamp_hi);
// stage 6
addsub_avx2(u[0], u[7], &u[0], &u[7], &clamp_lo, &clamp_hi);
addsub_avx2(u[1], u[6], &u[1], &u[6], &clamp_lo, &clamp_hi);
addsub_avx2(u[2], u[5], &u[2], &u[5], &clamp_lo, &clamp_hi);
addsub_avx2(u[3], u[4], &u[3], &u[4], &clamp_lo, &clamp_hi);
x = _mm256_mullo_epi32(u[10], cospi32);
y = _mm256_mullo_epi32(u[13], cospi32);
u[10] = _mm256_sub_epi32(y, x);
u[10] = _mm256_add_epi32(u[10], rnding);
u[10] = _mm256_srai_epi32(u[10], bit);
u[13] = _mm256_add_epi32(x, y);
u[13] = _mm256_add_epi32(u[13], rnding);
u[13] = _mm256_srai_epi32(u[13], bit);
x = _mm256_mullo_epi32(u[11], cospi32);
y = _mm256_mullo_epi32(u[12], cospi32);
u[11] = _mm256_sub_epi32(y, x);
u[11] = _mm256_add_epi32(u[11], rnding);
u[11] = _mm256_srai_epi32(u[11], bit);
u[12] = _mm256_add_epi32(x, y);
u[12] = _mm256_add_epi32(u[12], rnding);
u[12] = _mm256_srai_epi32(u[12], bit);
// stage 7
addsub_avx2(u[0], u[15], out + 0, out + 15, &clamp_lo, &clamp_hi);
addsub_avx2(u[1], u[14], out + 1, out + 14, &clamp_lo, &clamp_hi);
addsub_avx2(u[2], u[13], out + 2, out + 13, &clamp_lo, &clamp_hi);
addsub_avx2(u[3], u[12], out + 3, out + 12, &clamp_lo, &clamp_hi);
addsub_avx2(u[4], u[11], out + 4, out + 11, &clamp_lo, &clamp_hi);
addsub_avx2(u[5], u[10], out + 5, out + 10, &clamp_lo, &clamp_hi);
addsub_avx2(u[6], u[9], out + 6, out + 9, &clamp_lo, &clamp_hi);
addsub_avx2(u[7], u[8], out + 7, out + 8, &clamp_lo, &clamp_hi);
if (!do_cols) {
const int log_range_out = AOMMAX(16, bd + 6);
const __m256i clamp_lo_out =
_mm256_set1_epi32(-(1 << (log_range_out - 1)));
const __m256i clamp_hi_out =
_mm256_set1_epi32((1 << (log_range_out - 1)) - 1);
round_shift_8x8_avx2(out, out_shift);
highbd_clamp_epi32_avx2(out, out, &clamp_lo_out, &clamp_hi_out, 16);
}
}
}
static void idct16_avx2(__m256i *in, __m256i *out, int bit, int do_cols, int bd,
int out_shift) {
const int32_t *cospi = cospi_arr(bit);
const __m256i cospi60 = _mm256_set1_epi32(cospi[60]);
const __m256i cospim4 = _mm256_set1_epi32(-cospi[4]);
const __m256i cospi28 = _mm256_set1_epi32(cospi[28]);
const __m256i cospim36 = _mm256_set1_epi32(-cospi[36]);
const __m256i cospi44 = _mm256_set1_epi32(cospi[44]);
const __m256i cospi20 = _mm256_set1_epi32(cospi[20]);
const __m256i cospim20 = _mm256_set1_epi32(-cospi[20]);
const __m256i cospi12 = _mm256_set1_epi32(cospi[12]);
const __m256i cospim52 = _mm256_set1_epi32(-cospi[52]);
const __m256i cospi52 = _mm256_set1_epi32(cospi[52]);
const __m256i cospi36 = _mm256_set1_epi32(cospi[36]);
const __m256i cospi4 = _mm256_set1_epi32(cospi[4]);
const __m256i cospi56 = _mm256_set1_epi32(cospi[56]);
const __m256i cospim8 = _mm256_set1_epi32(-cospi[8]);
const __m256i cospi24 = _mm256_set1_epi32(cospi[24]);
const __m256i cospim40 = _mm256_set1_epi32(-cospi[40]);
const __m256i cospi40 = _mm256_set1_epi32(cospi[40]);
const __m256i cospi8 = _mm256_set1_epi32(cospi[8]);
const __m256i cospi32 = _mm256_set1_epi32(cospi[32]);
const __m256i cospi48 = _mm256_set1_epi32(cospi[48]);
const __m256i cospi16 = _mm256_set1_epi32(cospi[16]);
const __m256i cospim16 = _mm256_set1_epi32(-cospi[16]);
const __m256i cospim48 = _mm256_set1_epi32(-cospi[48]);
const __m256i rnding = _mm256_set1_epi32(1 << (bit - 1));
const int log_range = AOMMAX(16, bd + (do_cols ? 6 : 8));
const __m256i clamp_lo = _mm256_set1_epi32(-(1 << (log_range - 1)));
const __m256i clamp_hi = _mm256_set1_epi32((1 << (log_range - 1)) - 1);
__m256i u[16], v[16], x, y;
{
// stage 0
// stage 1
u[0] = in[0];
u[1] = in[8];
u[2] = in[4];
u[3] = in[12];
u[4] = in[2];
u[5] = in[10];
u[6] = in[6];
u[7] = in[14];
u[8] = in[1];
u[9] = in[9];
u[10] = in[5];
u[11] = in[13];
u[12] = in[3];
u[13] = in[11];
u[14] = in[7];
u[15] = in[15];
// stage 2
v[0] = u[0];
v[1] = u[1];
v[2] = u[2];
v[3] = u[3];
v[4] = u[4];
v[5] = u[5];
v[6] = u[6];
v[7] = u[7];
v[8] = half_btf_avx2(&cospi60, &u[8], &cospim4, &u[15], &rnding, bit);
v[9] = half_btf_avx2(&cospi28, &u[9], &cospim36, &u[14], &rnding, bit);
v[10] = half_btf_avx2(&cospi44, &u[10], &cospim20, &u[13], &rnding, bit);
v[11] = half_btf_avx2(&cospi12, &u[11], &cospim52, &u[12], &rnding, bit);
v[12] = half_btf_avx2(&cospi52, &u[11], &cospi12, &u[12], &rnding, bit);
v[13] = half_btf_avx2(&cospi20, &u[10], &cospi44, &u[13], &rnding, bit);
v[14] = half_btf_avx2(&cospi36, &u[9], &cospi28, &u[14], &rnding, bit);
v[15] = half_btf_avx2(&cospi4, &u[8], &cospi60, &u[15], &rnding, bit);
// stage 3
u[0] = v[0];
u[1] = v[1];
u[2] = v[2];
u[3] = v[3];
u[4] = half_btf_avx2(&cospi56, &v[4], &cospim8, &v[7], &rnding, bit);
u[5] = half_btf_avx2(&cospi24, &v[5], &cospim40, &v[6], &rnding, bit);
u[6] = half_btf_avx2(&cospi40, &v[5], &cospi24, &v[6], &rnding, bit);
u[7] = half_btf_avx2(&cospi8, &v[4], &cospi56, &v[7], &rnding, bit);
addsub_avx2(v[8], v[9], &u[8], &u[9], &clamp_lo, &clamp_hi);
addsub_avx2(v[11], v[10], &u[11], &u[10], &clamp_lo, &clamp_hi);
addsub_avx2(v[12], v[13], &u[12], &u[13], &clamp_lo, &clamp_hi);
addsub_avx2(v[15], v[14], &u[15], &u[14], &clamp_lo, &clamp_hi);
// stage 4
x = _mm256_mullo_epi32(u[0], cospi32);
y = _mm256_mullo_epi32(u[1], cospi32);
v[0] = _mm256_add_epi32(x, y);
v[0] = _mm256_add_epi32(v[0], rnding);
v[0] = _mm256_srai_epi32(v[0], bit);
v[1] = _mm256_sub_epi32(x, y);
v[1] = _mm256_add_epi32(v[1], rnding);
v[1] = _mm256_srai_epi32(v[1], bit);
v[2] = half_btf_avx2(&cospi48, &u[2], &cospim16, &u[3], &rnding, bit);
v[3] = half_btf_avx2(&cospi16, &u[2], &cospi48, &u[3], &rnding, bit);
addsub_avx2(u[4], u[5], &v[4], &v[5], &clamp_lo, &clamp_hi);
addsub_avx2(u[7], u[6], &v[7], &v[6], &clamp_lo, &clamp_hi);
v[8] = u[8];
v[9] = half_btf_avx2(&cospim16, &u[9], &cospi48, &u[14], &rnding, bit);
v[10] = half_btf_avx2(&cospim48, &u[10], &cospim16, &u[13], &rnding, bit);
v[11] = u[11];
v[12] = u[12];
v[13] = half_btf_avx2(&cospim16, &u[10], &cospi48, &u[13], &rnding, bit);
v[14] = half_btf_avx2(&cospi48, &u[9], &cospi16, &u[14], &rnding, bit);
v[15] = u[15];
// stage 5
addsub_avx2(v[0], v[3], &u[0], &u[3], &clamp_lo, &clamp_hi);
addsub_avx2(v[1], v[2], &u[1], &u[2], &clamp_lo, &clamp_hi);
u[4] = v[4];
x = _mm256_mullo_epi32(v[5], cospi32);
y = _mm256_mullo_epi32(v[6], cospi32);
u[5] = _mm256_sub_epi32(y, x);
u[5] = _mm256_add_epi32(u[5], rnding);
u[5] = _mm256_srai_epi32(u[5], bit);
u[6] = _mm256_add_epi32(y, x);
u[6] = _mm256_add_epi32(u[6], rnding);
u[6] = _mm256_srai_epi32(u[6], bit);
u[7] = v[7];
addsub_avx2(v[8], v[11], &u[8], &u[11], &clamp_lo, &clamp_hi);
addsub_avx2(v[9], v[10], &u[9], &u[10], &clamp_lo, &clamp_hi);
addsub_avx2(v[15], v[12], &u[15], &u[12], &clamp_lo, &clamp_hi);
addsub_avx2(v[14], v[13], &u[14], &u[13], &clamp_lo, &clamp_hi);
// stage 6
addsub_avx2(u[0], u[7], &v[0], &v[7], &clamp_lo, &clamp_hi);
addsub_avx2(u[1], u[6], &v[1], &v[6], &clamp_lo, &clamp_hi);
addsub_avx2(u[2], u[5], &v[2], &v[5], &clamp_lo, &clamp_hi);
addsub_avx2(u[3], u[4], &v[3], &v[4], &clamp_lo, &clamp_hi);
v[8] = u[8];
v[9] = u[9];
x = _mm256_mullo_epi32(u[10], cospi32);
y = _mm256_mullo_epi32(u[13], cospi32);
v[10] = _mm256_sub_epi32(y, x);
v[10] = _mm256_add_epi32(v[10], rnding);
v[10] = _mm256_srai_epi32(v[10], bit);
v[13] = _mm256_add_epi32(x, y);
v[13] = _mm256_add_epi32(v[13], rnding);
v[13] = _mm256_srai_epi32(v[13], bit);
x = _mm256_mullo_epi32(u[11], cospi32);
y = _mm256_mullo_epi32(u[12], cospi32);
v[11] = _mm256_sub_epi32(y, x);
v[11] = _mm256_add_epi32(v[11], rnding);
v[11] = _mm256_srai_epi32(v[11], bit);
v[12] = _mm256_add_epi32(x, y);
v[12] = _mm256_add_epi32(v[12], rnding);
v[12] = _mm256_srai_epi32(v[12], bit);
v[14] = u[14];
v[15] = u[15];
// stage 7
addsub_avx2(v[0], v[15], out + 0, out + 15, &clamp_lo, &clamp_hi);
addsub_avx2(v[1], v[14], out + 1, out + 14, &clamp_lo, &clamp_hi);
addsub_avx2(v[2], v[13], out + 2, out + 13, &clamp_lo, &clamp_hi);
addsub_avx2(v[3], v[12], out + 3, out + 12, &clamp_lo, &clamp_hi);
addsub_avx2(v[4], v[11], out + 4, out + 11, &clamp_lo, &clamp_hi);
addsub_avx2(v[5], v[10], out + 5, out + 10, &clamp_lo, &clamp_hi);
addsub_avx2(v[6], v[9], out + 6, out + 9, &clamp_lo, &clamp_hi);
addsub_avx2(v[7], v[8], out + 7, out + 8, &clamp_lo, &clamp_hi);
if (!do_cols) {
const int log_range_out = AOMMAX(16, bd + 6);
const __m256i clamp_lo_out =
_mm256_set1_epi32(-(1 << (log_range_out - 1)));
const __m256i clamp_hi_out =
_mm256_set1_epi32((1 << (log_range_out - 1)) - 1);
round_shift_8x8_avx2(out, out_shift);
highbd_clamp_epi32_avx2(out, out, &clamp_lo_out, &clamp_hi_out, 16);
}
}
}
static void iadst16_low1_avx2(__m256i *in, __m256i *out, int bit, int do_cols,
int bd, int out_shift) {
const int32_t *cospi = cospi_arr(bit);
const __m256i cospi2 = _mm256_set1_epi32(cospi[2]);
const __m256i cospi62 = _mm256_set1_epi32(cospi[62]);
const __m256i cospi8 = _mm256_set1_epi32(cospi[8]);
const __m256i cospi56 = _mm256_set1_epi32(cospi[56]);
const __m256i cospi48 = _mm256_set1_epi32(cospi[48]);
const __m256i cospi16 = _mm256_set1_epi32(cospi[16]);
const __m256i cospi32 = _mm256_set1_epi32(cospi[32]);
const __m256i rnding = _mm256_set1_epi32(1 << (bit - 1));
const __m256i zero = _mm256_setzero_si256();
__m256i v[16], x, y, temp1, temp2;
// Calculate the column 0, 1, 2, 3
{
// stage 0
// stage 1
// stage 2
x = _mm256_mullo_epi32(in[0], cospi62);
v[0] = _mm256_add_epi32(x, rnding);
v[0] = _mm256_srai_epi32(v[0], bit);
x = _mm256_mullo_epi32(in[0], cospi2);
v[1] = _mm256_sub_epi32(zero, x);
v[1] = _mm256_add_epi32(v[1], rnding);
v[1] = _mm256_srai_epi32(v[1], bit);
// stage 3
v[8] = v[0];
v[9] = v[1];
// stage 4
temp1 = _mm256_mullo_epi32(v[8], cospi8);
x = _mm256_mullo_epi32(v[9], cospi56);
temp1 = _mm256_add_epi32(temp1, x);
temp1 = _mm256_add_epi32(temp1, rnding);
temp1 = _mm256_srai_epi32(temp1, bit);
temp2 = _mm256_mullo_epi32(v[8], cospi56);
x = _mm256_mullo_epi32(v[9], cospi8);
temp2 = _mm256_sub_epi32(temp2, x);
temp2 = _mm256_add_epi32(temp2, rnding);
temp2 = _mm256_srai_epi32(temp2, bit);
v[8] = temp1;
v[9] = temp2;
// stage 5
v[4] = v[0];
v[5] = v[1];
v[12] = v[8];
v[13] = v[9];
// stage 6
temp1 = _mm256_mullo_epi32(v[4], cospi16);
x = _mm256_mullo_epi32(v[5], cospi48);
temp1 = _mm256_add_epi32(temp1, x);
temp1 = _mm256_add_epi32(temp1, rnding);
temp1 = _mm256_srai_epi32(temp1, bit);
temp2 = _mm256_mullo_epi32(v[4], cospi48);
x = _mm256_mullo_epi32(v[5], cospi16);
temp2 = _mm256_sub_epi32(temp2, x);
temp2 = _mm256_add_epi32(temp2, rnding);
temp2 = _mm256_srai_epi32(temp2, bit);
v[4] = temp1;
v[5] = temp2;
temp1 = _mm256_mullo_epi32(v[12], cospi16);
x = _mm256_mullo_epi32(v[13], cospi48);
temp1 = _mm256_add_epi32(temp1, x);
temp1 = _mm256_add_epi32(temp1, rnding);
temp1 = _mm256_srai_epi32(temp1, bit);
temp2 = _mm256_mullo_epi32(v[12], cospi48);
x = _mm256_mullo_epi32(v[13], cospi16);
temp2 = _mm256_sub_epi32(temp2, x);
temp2 = _mm256_add_epi32(temp2, rnding);
temp2 = _mm256_srai_epi32(temp2, bit);
v[12] = temp1;
v[13] = temp2;
// stage 7
v[2] = v[0];
v[3] = v[1];
v[6] = v[4];
v[7] = v[5];
v[10] = v[8];
v[11] = v[9];
v[14] = v[12];
v[15] = v[13];
// stage 8
y = _mm256_mullo_epi32(v[2], cospi32);
x = _mm256_mullo_epi32(v[3], cospi32);
v[2] = _mm256_add_epi32(y, x);
v[2] = _mm256_add_epi32(v[2], rnding);
v[2] = _mm256_srai_epi32(v[2], bit);
v[3] = _mm256_sub_epi32(y, x);
v[3] = _mm256_add_epi32(v[3], rnding);
v[3] = _mm256_srai_epi32(v[3], bit);
y = _mm256_mullo_epi32(v[6], cospi32);
x = _mm256_mullo_epi32(v[7], cospi32);
v[6] = _mm256_add_epi32(y, x);
v[6] = _mm256_add_epi32(v[6], rnding);
v[6] = _mm256_srai_epi32(v[6], bit);
v[7] = _mm256_sub_epi32(y, x);
v[7] = _mm256_add_epi32(v[7], rnding);
v[7] = _mm256_srai_epi32(v[7], bit);
y = _mm256_mullo_epi32(v[10], cospi32);
x = _mm256_mullo_epi32(v[11], cospi32);
v[10] = _mm256_add_epi32(y, x);
v[10] = _mm256_add_epi32(v[10], rnding);
v[10] = _mm256_srai_epi32(v[10], bit);
v[11] = _mm256_sub_epi32(y, x);
v[11] = _mm256_add_epi32(v[11], rnding);
v[11] = _mm256_srai_epi32(v[11], bit);
y = _mm256_mullo_epi32(v[14], cospi32);
x = _mm256_mullo_epi32(v[15], cospi32);
v[14] = _mm256_add_epi32(y, x);
v[14] = _mm256_add_epi32(v[14], rnding);
v[14] = _mm256_srai_epi32(v[14], bit);
v[15] = _mm256_sub_epi32(y, x);
v[15] = _mm256_add_epi32(v[15], rnding);
v[15] = _mm256_srai_epi32(v[15], bit);
// stage 9
if (do_cols) {
out[0] = v[0];
out[1] = _mm256_sub_epi32(_mm256_setzero_si256(), v[8]);
out[2] = v[12];
out[3] = _mm256_sub_epi32(_mm256_setzero_si256(), v[4]);
out[4] = v[6];
out[5] = _mm256_sub_epi32(_mm256_setzero_si256(), v[14]);
out[6] = v[10];
out[7] = _mm256_sub_epi32(_mm256_setzero_si256(), v[2]);
out[8] = v[3];
out[9] = _mm256_sub_epi32(_mm256_setzero_si256(), v[11]);
out[10] = v[15];
out[11] = _mm256_sub_epi32(_mm256_setzero_si256(), v[7]);
out[12] = v[5];
out[13] = _mm256_sub_epi32(_mm256_setzero_si256(), v[13]);
out[14] = v[9];
out[15] = _mm256_sub_epi32(_mm256_setzero_si256(), v[1]);
} else {
const int log_range_out = AOMMAX(16, bd + 6);
const __m256i clamp_lo_out =
_mm256_set1_epi32(-(1 << (log_range_out - 1)));
const __m256i clamp_hi_out =
_mm256_set1_epi32((1 << (log_range_out - 1)) - 1);
neg_shift_avx2(v[0], v[8], out + 0, out + 1, &clamp_lo_out, &clamp_hi_out,
out_shift);
neg_shift_avx2(v[12], v[4], out + 2, out + 3, &clamp_lo_out,
&clamp_hi_out, out_shift);
neg_shift_avx2(v[6], v[14], out + 4, out + 5, &clamp_lo_out,
&clamp_hi_out, out_shift);
neg_shift_avx2(v[10], v[2], out + 6, out + 7, &clamp_lo_out,
&clamp_hi_out, out_shift);
neg_shift_avx2(v[3], v[11], out + 8, out + 9, &clamp_lo_out,
&clamp_hi_out, out_shift);
neg_shift_avx2(v[15], v[7], out + 10, out + 11, &clamp_lo_out,
&clamp_hi_out, out_shift);
neg_shift_avx2(v[5], v[13], out + 12, out + 13, &clamp_lo_out,
&clamp_hi_out, out_shift);
neg_shift_avx2(v[9], v[1], out + 14, out + 15, &clamp_lo_out,
&clamp_hi_out, out_shift);
}
}
}
static void iadst16_low8_avx2(__m256i *in, __m256i *out, int bit, int do_cols,
int bd, int out_shift) {
const int32_t *cospi = cospi_arr(bit);
const __m256i cospi2 = _mm256_set1_epi32(cospi[2]);
const __m256i cospi62 = _mm256_set1_epi32(cospi[62]);
const __m256i cospi10 = _mm256_set1_epi32(cospi[10]);
const __m256i cospi54 = _mm256_set1_epi32(cospi[54]);
const __m256i cospi18 = _mm256_set1_epi32(cospi[18]);
const __m256i cospi46 = _mm256_set1_epi32(cospi[46]);
const __m256i cospi26 = _mm256_set1_epi32(cospi[26]);
const __m256i cospi38 = _mm256_set1_epi32(cospi[38]);
const __m256i cospi34 = _mm256_set1_epi32(cospi[34]);
const __m256i cospi30 = _mm256_set1_epi32(cospi[30]);
const __m256i cospi42 = _mm256_set1_epi32(cospi[42]);
const __m256i cospi22 = _mm256_set1_epi32(cospi[22]);
const __m256i cospi50 = _mm256_set1_epi32(cospi[50]);
const __m256i cospi14 = _mm256_set1_epi32(cospi[14]);
const __m256i cospi58 = _mm256_set1_epi32(cospi[58]);
const __m256i cospi6 = _mm256_set1_epi32(cospi[6]);
const __m256i cospi8 = _mm256_set1_epi32(cospi[8]);
const __m256i cospi56 = _mm256_set1_epi32(cospi[56]);
const __m256i cospi40 = _mm256_set1_epi32(cospi[40]);
const __m256i cospi24 = _mm256_set1_epi32(cospi[24]);
const __m256i cospim56 = _mm256_set1_epi32(-cospi[56]);
const __m256i cospim24 = _mm256_set1_epi32(-cospi[24]);
const __m256i cospi48 = _mm256_set1_epi32(cospi[48]);
const __m256i cospi16 = _mm256_set1_epi32(cospi[16]);
const __m256i cospim48 = _mm256_set1_epi32(-cospi[48]);
const __m256i cospi32 = _mm256_set1_epi32(cospi[32]);
const __m256i rnding = _mm256_set1_epi32(1 << (bit - 1));
const int log_range = AOMMAX(16, bd + (do_cols ? 6 : 8));
const __m256i clamp_lo = _mm256_set1_epi32(-(1 << (log_range - 1)));
const __m256i clamp_hi = _mm256_set1_epi32((1 << (log_range - 1)) - 1);
__m256i u[16], x, y;
{
// stage 0
// stage 1
// stage 2
__m256i zero = _mm256_setzero_si256();
x = _mm256_mullo_epi32(in[0], cospi62);
u[0] = _mm256_add_epi32(x, rnding);
u[0] = _mm256_srai_epi32(u[0], bit);
x = _mm256_mullo_epi32(in[0], cospi2);
u[1] = _mm256_sub_epi32(zero, x);
u[1] = _mm256_add_epi32(u[1], rnding);
u[1] = _mm256_srai_epi32(u[1], bit);
x = _mm256_mullo_epi32(in[2], cospi54);
u[2] = _mm256_add_epi32(x, rnding);
u[2] = _mm256_srai_epi32(u[2], bit);
x = _mm256_mullo_epi32(in[2], cospi10);
u[3] = _mm256_sub_epi32(zero, x);
u[3] = _mm256_add_epi32(u[3], rnding);
u[3] = _mm256_srai_epi32(u[3], bit);
x = _mm256_mullo_epi32(in[4], cospi46);
u[4] = _mm256_add_epi32(x, rnding);
u[4] = _mm256_srai_epi32(u[4], bit);
x = _mm256_mullo_epi32(in[4], cospi18);
u[5] = _mm256_sub_epi32(zero, x);
u[5] = _mm256_add_epi32(u[5], rnding);
u[5] = _mm256_srai_epi32(u[5], bit);
x = _mm256_mullo_epi32(in[6], cospi38);
u[6] = _mm256_add_epi32(x, rnding);
u[6] = _mm256_srai_epi32(u[6], bit);
x = _mm256_mullo_epi32(in[6], cospi26);
u[7] = _mm256_sub_epi32(zero, x);
u[7] = _mm256_add_epi32(u[7], rnding);
u[7] = _mm256_srai_epi32(u[7], bit);
u[8] = _mm256_mullo_epi32(in[7], cospi34);
u[8] = _mm256_add_epi32(u[8], rnding);
u[8] = _mm256_srai_epi32(u[8], bit);
u[9] = _mm256_mullo_epi32(in[7], cospi30);
u[9] = _mm256_add_epi32(u[9], rnding);
u[9] = _mm256_srai_epi32(u[9], bit);
u[10] = _mm256_mullo_epi32(in[5], cospi42);
u[10] = _mm256_add_epi32(u[10], rnding);
u[10] = _mm256_srai_epi32(u[10], bit);
u[11] = _mm256_mullo_epi32(in[5], cospi22);
u[11] = _mm256_add_epi32(u[11], rnding);
u[11] = _mm256_srai_epi32(u[11], bit);
u[12] = _mm256_mullo_epi32(in[3], cospi50);
u[12] = _mm256_add_epi32(u[12], rnding);
u[12] = _mm256_srai_epi32(u[12], bit);
u[13] = _mm256_mullo_epi32(in[3], cospi14);
u[13] = _mm256_add_epi32(u[13], rnding);
u[13] = _mm256_srai_epi32(u[13], bit);
u[14] = _mm256_mullo_epi32(in[1], cospi58);
u[14] = _mm256_add_epi32(u[14], rnding);
u[14] = _mm256_srai_epi32(u[14], bit);
u[15] = _mm256_mullo_epi32(in[1], cospi6);
u[15] = _mm256_add_epi32(u[15], rnding);
u[15] = _mm256_srai_epi32(u[15], bit);
// stage 3
addsub_avx2(u[0], u[8], &u[0], &u[8], &clamp_lo, &clamp_hi);
addsub_avx2(u[1], u[9], &u[1], &u[9], &clamp_lo, &clamp_hi);
addsub_avx2(u[2], u[10], &u[2], &u[10], &clamp_lo, &clamp_hi);
addsub_avx2(u[3], u[11], &u[3], &u[11], &clamp_lo, &clamp_hi);
addsub_avx2(u[4], u[12], &u[4], &u[12], &clamp_lo, &clamp_hi);
addsub_avx2(u[5], u[13], &u[5], &u[13], &clamp_lo, &clamp_hi);
addsub_avx2(u[6], u[14], &u[6], &u[14], &clamp_lo, &clamp_hi);
addsub_avx2(u[7], u[15], &u[7], &u[15], &clamp_lo, &clamp_hi);
// stage 4
y = _mm256_mullo_epi32(u[8], cospi56);
x = _mm256_mullo_epi32(u[9], cospi56);
u[8] = _mm256_mullo_epi32(u[8], cospi8);
u[8] = _mm256_add_epi32(u[8], x);
u[8] = _mm256_add_epi32(u[8], rnding);
u[8] = _mm256_srai_epi32(u[8], bit);
x = _mm256_mullo_epi32(u[9], cospi8);
u[9] = _mm256_sub_epi32(y, x);
u[9] = _mm256_add_epi32(u[9], rnding);
u[9] = _mm256_srai_epi32(u[9], bit);
x = _mm256_mullo_epi32(u[11], cospi24);
y = _mm256_mullo_epi32(u[10], cospi24);
u[10] = _mm256_mullo_epi32(u[10], cospi40);
u[10] = _mm256_add_epi32(u[10], x);
u[10] = _mm256_add_epi32(u[10], rnding);
u[10] = _mm256_srai_epi32(u[10], bit);
x = _mm256_mullo_epi32(u[11], cospi40);
u[11] = _mm256_sub_epi32(y, x);
u[11] = _mm256_add_epi32(u[11], rnding);
u[11] = _mm256_srai_epi32(u[11], bit);
x = _mm256_mullo_epi32(u[13], cospi8);
y = _mm256_mullo_epi32(u[12], cospi8);
u[12] = _mm256_mullo_epi32(u[12], cospim56);
u[12] = _mm256_add_epi32(u[12], x);
u[12] = _mm256_add_epi32(u[12], rnding);
u[12] = _mm256_srai_epi32(u[12], bit);
x = _mm256_mullo_epi32(u[13], cospim56);
u[13] = _mm256_sub_epi32(y, x);
u[13] = _mm256_add_epi32(u[13], rnding);
u[13] = _mm256_srai_epi32(u[13], bit);
x = _mm256_mullo_epi32(u[15], cospi40);
y = _mm256_mullo_epi32(u[14], cospi40);
u[14] = _mm256_mullo_epi32(u[14], cospim24);
u[14] = _mm256_add_epi32(u[14], x);
u[14] = _mm256_add_epi32(u[14], rnding);
u[14] = _mm256_srai_epi32(u[14], bit);
x = _mm256_mullo_epi32(u[15], cospim24);
u[15] = _mm256_sub_epi32(y, x);
u[15] = _mm256_add_epi32(u[15], rnding);
u[15] = _mm256_srai_epi32(u[15], bit);
// stage 5
addsub_avx2(u[0], u[4], &u[0], &u[4], &clamp_lo, &clamp_hi);
addsub_avx2(u[1], u[5], &u[1], &u[5], &clamp_lo, &clamp_hi);
addsub_avx2(u[2], u[6], &u[2], &u[6], &clamp_lo, &clamp_hi);
addsub_avx2(u[3], u[7], &u[3], &u[7], &clamp_lo, &clamp_hi);
addsub_avx2(u[8], u[12], &u[8], &u[12], &clamp_lo, &clamp_hi);
addsub_avx2(u[9], u[13], &u[9], &u[13], &clamp_lo, &clamp_hi);
addsub_avx2(u[10], u[14], &u[10], &u[14], &clamp_lo, &clamp_hi);
addsub_avx2(u[11], u[15], &u[11], &u[15], &clamp_lo, &clamp_hi);
// stage 6
x = _mm256_mullo_epi32(u[5], cospi48);
y = _mm256_mullo_epi32(u[4], cospi48);
u[4] = _mm256_mullo_epi32(u[4], cospi16);
u[4] = _mm256_add_epi32(u[4], x);
u[4] = _mm256_add_epi32(u[4], rnding);
u[4] = _mm256_srai_epi32(u[4], bit);
x = _mm256_mullo_epi32(u[5], cospi16);
u[5] = _mm256_sub_epi32(y, x);
u[5] = _mm256_add_epi32(u[5], rnding);
u[5] = _mm256_srai_epi32(u[5], bit);
x = _mm256_mullo_epi32(u[7], cospi16);
y = _mm256_mullo_epi32(u[6], cospi16);
u[6] = _mm256_mullo_epi32(u[6], cospim48);
u[6] = _mm256_add_epi32(u[6], x);
u[6] = _mm256_add_epi32(u[6], rnding);
u[6] = _mm256_srai_epi32(u[6], bit);
x = _mm256_mullo_epi32(u[7], cospim48);
u[7] = _mm256_sub_epi32(y, x);
u[7] = _mm256_add_epi32(u[7], rnding);
u[7] = _mm256_srai_epi32(u[7], bit);
x = _mm256_mullo_epi32(u[13], cospi48);
y = _mm256_mullo_epi32(u[12], cospi48);
u[12] = _mm256_mullo_epi32(u[12], cospi16);
u[12] = _mm256_add_epi32(u[12], x);
u[12] = _mm256_add_epi32(u[12], rnding);
u[12] = _mm256_srai_epi32(u[12], bit);
x = _mm256_mullo_epi32(u[13], cospi16);
u[13] = _mm256_sub_epi32(y, x);
u[13] = _mm256_add_epi32(u[13], rnding);
u[13] = _mm256_srai_epi32(u[13], bit);
x = _mm256_mullo_epi32(u[15], cospi16);
y = _mm256_mullo_epi32(u[14], cospi16);
u[14] = _mm256_mullo_epi32(u[14], cospim48);
u[14] = _mm256_add_epi32(u[14], x);
u[14] = _mm256_add_epi32(u[14], rnding);
u[14] = _mm256_srai_epi32(u[14], bit);
x = _mm256_mullo_epi32(u[15], cospim48);
u[15] = _mm256_sub_epi32(y, x);
u[15] = _mm256_add_epi32(u[15], rnding);
u[15] = _mm256_srai_epi32(u[15], bit);
// stage 7
addsub_avx2(u[0], u[2], &u[0], &u[2], &clamp_lo, &clamp_hi);
addsub_avx2(u[1], u[3], &u[1], &u[3], &clamp_lo, &clamp_hi);
addsub_avx2(u[4], u[6], &u[4], &u[6], &clamp_lo, &clamp_hi);
addsub_avx2(u[5], u[7], &u[5], &u[7], &clamp_lo, &clamp_hi);
addsub_avx2(u[8], u[10], &u[8], &u[10], &clamp_lo, &clamp_hi);
addsub_avx2(u[9], u[11], &u[9], &u[11], &clamp_lo, &clamp_hi);
addsub_avx2(u[12], u[14], &u[12], &u[14], &clamp_lo, &clamp_hi);
addsub_avx2(u[13], u[15], &u[13], &u[15], &clamp_lo, &clamp_hi);
// stage 8
y = _mm256_mullo_epi32(u[2], cospi32);
x = _mm256_mullo_epi32(u[3], cospi32);
u[2] = _mm256_add_epi32(y, x);
u[2] = _mm256_add_epi32(u[2], rnding);
u[2] = _mm256_srai_epi32(u[2], bit);
u[3] = _mm256_sub_epi32(y, x);
u[3] = _mm256_add_epi32(u[3], rnding);
u[3] = _mm256_srai_epi32(u[3], bit);
y = _mm256_mullo_epi32(u[6], cospi32);
x = _mm256_mullo_epi32(u[7], cospi32);
u[6] = _mm256_add_epi32(y, x);
u[6] = _mm256_add_epi32(u[6], rnding);
u[6] = _mm256_srai_epi32(u[6], bit);
u[7] = _mm256_sub_epi32(y, x);
u[7] = _mm256_add_epi32(u[7], rnding);
u[7] = _mm256_srai_epi32(u[7], bit);
y = _mm256_mullo_epi32(u[10], cospi32);
x = _mm256_mullo_epi32(u[11], cospi32);
u[10] = _mm256_add_epi32(y, x);
u[10] = _mm256_add_epi32(u[10], rnding);
u[10] = _mm256_srai_epi32(u[10], bit);
u[11] = _mm256_sub_epi32(y, x);