ref: 4906cea0276c17a089f3b7616a43511cbc5ff069
dir: /vpx_dsp/x86/avg_intrin_avx2.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 <immintrin.h>
#include "./vpx_dsp_rtcd.h"
#include "vpx/vpx_integer.h"
#include "vpx_dsp/x86/bitdepth_conversion_avx2.h"
#include "vpx_ports/mem.h"
static void hadamard_col8x2_avx2(__m256i *in, int iter) {
__m256i a0 = in[0];
__m256i a1 = in[1];
__m256i a2 = in[2];
__m256i a3 = in[3];
__m256i a4 = in[4];
__m256i a5 = in[5];
__m256i a6 = in[6];
__m256i a7 = in[7];
__m256i b0 = _mm256_add_epi16(a0, a1);
__m256i b1 = _mm256_sub_epi16(a0, a1);
__m256i b2 = _mm256_add_epi16(a2, a3);
__m256i b3 = _mm256_sub_epi16(a2, a3);
__m256i b4 = _mm256_add_epi16(a4, a5);
__m256i b5 = _mm256_sub_epi16(a4, a5);
__m256i b6 = _mm256_add_epi16(a6, a7);
__m256i b7 = _mm256_sub_epi16(a6, a7);
a0 = _mm256_add_epi16(b0, b2);
a1 = _mm256_add_epi16(b1, b3);
a2 = _mm256_sub_epi16(b0, b2);
a3 = _mm256_sub_epi16(b1, b3);
a4 = _mm256_add_epi16(b4, b6);
a5 = _mm256_add_epi16(b5, b7);
a6 = _mm256_sub_epi16(b4, b6);
a7 = _mm256_sub_epi16(b5, b7);
if (iter == 0) {
b0 = _mm256_add_epi16(a0, a4);
b7 = _mm256_add_epi16(a1, a5);
b3 = _mm256_add_epi16(a2, a6);
b4 = _mm256_add_epi16(a3, a7);
b2 = _mm256_sub_epi16(a0, a4);
b6 = _mm256_sub_epi16(a1, a5);
b1 = _mm256_sub_epi16(a2, a6);
b5 = _mm256_sub_epi16(a3, a7);
a0 = _mm256_unpacklo_epi16(b0, b1);
a1 = _mm256_unpacklo_epi16(b2, b3);
a2 = _mm256_unpackhi_epi16(b0, b1);
a3 = _mm256_unpackhi_epi16(b2, b3);
a4 = _mm256_unpacklo_epi16(b4, b5);
a5 = _mm256_unpacklo_epi16(b6, b7);
a6 = _mm256_unpackhi_epi16(b4, b5);
a7 = _mm256_unpackhi_epi16(b6, b7);
b0 = _mm256_unpacklo_epi32(a0, a1);
b1 = _mm256_unpacklo_epi32(a4, a5);
b2 = _mm256_unpackhi_epi32(a0, a1);
b3 = _mm256_unpackhi_epi32(a4, a5);
b4 = _mm256_unpacklo_epi32(a2, a3);
b5 = _mm256_unpacklo_epi32(a6, a7);
b6 = _mm256_unpackhi_epi32(a2, a3);
b7 = _mm256_unpackhi_epi32(a6, a7);
in[0] = _mm256_unpacklo_epi64(b0, b1);
in[1] = _mm256_unpackhi_epi64(b0, b1);
in[2] = _mm256_unpacklo_epi64(b2, b3);
in[3] = _mm256_unpackhi_epi64(b2, b3);
in[4] = _mm256_unpacklo_epi64(b4, b5);
in[5] = _mm256_unpackhi_epi64(b4, b5);
in[6] = _mm256_unpacklo_epi64(b6, b7);
in[7] = _mm256_unpackhi_epi64(b6, b7);
} else {
in[0] = _mm256_add_epi16(a0, a4);
in[7] = _mm256_add_epi16(a1, a5);
in[3] = _mm256_add_epi16(a2, a6);
in[4] = _mm256_add_epi16(a3, a7);
in[2] = _mm256_sub_epi16(a0, a4);
in[6] = _mm256_sub_epi16(a1, a5);
in[1] = _mm256_sub_epi16(a2, a6);
in[5] = _mm256_sub_epi16(a3, a7);
}
}
static void hadamard_8x8x2_avx2(int16_t const *src_diff, int src_stride,
tran_low_t *coeff) {
__m256i src[8];
src[0] = _mm256_loadu_si256((const __m256i *)src_diff);
src[1] = _mm256_loadu_si256((const __m256i *)(src_diff += src_stride));
src[2] = _mm256_loadu_si256((const __m256i *)(src_diff += src_stride));
src[3] = _mm256_loadu_si256((const __m256i *)(src_diff += src_stride));
src[4] = _mm256_loadu_si256((const __m256i *)(src_diff += src_stride));
src[5] = _mm256_loadu_si256((const __m256i *)(src_diff += src_stride));
src[6] = _mm256_loadu_si256((const __m256i *)(src_diff += src_stride));
src[7] = _mm256_loadu_si256((const __m256i *)(src_diff += src_stride));
hadamard_col8x2_avx2(src, 0);
hadamard_col8x2_avx2(src, 1);
// TODO(slavarnway): FIXME: For high bitdepths, it is unnecessary to
// mult/unpack/store here and load/pack the same memory in the next stage.
// Try using an intermediate buffer and store_tran_low() in the last stage.
store_tran_low(_mm256_permute2x128_si256(src[0], src[1], 0x20), coeff);
coeff += 16;
store_tran_low(_mm256_permute2x128_si256(src[2], src[3], 0x20), coeff);
coeff += 16;
store_tran_low(_mm256_permute2x128_si256(src[4], src[5], 0x20), coeff);
coeff += 16;
store_tran_low(_mm256_permute2x128_si256(src[6], src[7], 0x20), coeff);
coeff += 16;
store_tran_low(_mm256_permute2x128_si256(src[0], src[1], 0x31), coeff);
coeff += 16;
store_tran_low(_mm256_permute2x128_si256(src[2], src[3], 0x31), coeff);
coeff += 16;
store_tran_low(_mm256_permute2x128_si256(src[4], src[5], 0x31), coeff);
coeff += 16;
store_tran_low(_mm256_permute2x128_si256(src[6], src[7], 0x31), coeff);
}
void vpx_hadamard_16x16_avx2(int16_t const *src_diff, int src_stride,
tran_low_t *coeff) {
int idx;
for (idx = 0; idx < 2; ++idx) {
int16_t const *src_ptr = src_diff + idx * 8 * src_stride;
hadamard_8x8x2_avx2(src_ptr, src_stride, coeff + (idx * 64 * 2));
}
for (idx = 0; idx < 64; idx += 16) {
const __m256i coeff0 = load_tran_low(coeff);
const __m256i coeff1 = load_tran_low(coeff + 64);
const __m256i coeff2 = load_tran_low(coeff + 128);
const __m256i coeff3 = load_tran_low(coeff + 192);
__m256i b0 = _mm256_add_epi16(coeff0, coeff1);
__m256i b1 = _mm256_sub_epi16(coeff0, coeff1);
__m256i b2 = _mm256_add_epi16(coeff2, coeff3);
__m256i b3 = _mm256_sub_epi16(coeff2, coeff3);
b0 = _mm256_srai_epi16(b0, 1);
b1 = _mm256_srai_epi16(b1, 1);
b2 = _mm256_srai_epi16(b2, 1);
b3 = _mm256_srai_epi16(b3, 1);
store_tran_low(_mm256_add_epi16(b0, b2), coeff);
store_tran_low(_mm256_add_epi16(b1, b3), coeff + 64);
store_tran_low(_mm256_sub_epi16(b0, b2), coeff + 128);
store_tran_low(_mm256_sub_epi16(b1, b3), coeff + 192);
coeff += 16;
}
}