| /* |
| * 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> // AVX512 |
| #include "./vpx_dsp_rtcd.h" |
| #include "vpx/vpx_integer.h" |
| |
| void vpx_sad64x64x4d_avx512(const uint8_t *src_ptr, int src_stride, |
| const uint8_t *const ref_array[4], int ref_stride, |
| uint32_t res[4]) { |
| __m512i src_reg, ref0_reg, ref1_reg, ref2_reg, ref3_reg; |
| __m512i sum_ref0, sum_ref1, sum_ref2, sum_ref3; |
| __m512i sum_mlow, sum_mhigh; |
| int i; |
| const uint8_t *ref0, *ref1, *ref2, *ref3; |
| |
| ref0 = ref_array[0]; |
| ref1 = ref_array[1]; |
| ref2 = ref_array[2]; |
| ref3 = ref_array[3]; |
| sum_ref0 = _mm512_set1_epi16(0); |
| sum_ref1 = _mm512_set1_epi16(0); |
| sum_ref2 = _mm512_set1_epi16(0); |
| sum_ref3 = _mm512_set1_epi16(0); |
| for (i = 0; i < 64; i++) { |
| // load src and all ref[] |
| src_reg = _mm512_loadu_si512((const __m512i *)src_ptr); |
| ref0_reg = _mm512_loadu_si512((const __m512i *)ref0); |
| ref1_reg = _mm512_loadu_si512((const __m512i *)ref1); |
| ref2_reg = _mm512_loadu_si512((const __m512i *)ref2); |
| ref3_reg = _mm512_loadu_si512((const __m512i *)ref3); |
| // sum of the absolute differences between every ref[] to src |
| ref0_reg = _mm512_sad_epu8(ref0_reg, src_reg); |
| ref1_reg = _mm512_sad_epu8(ref1_reg, src_reg); |
| ref2_reg = _mm512_sad_epu8(ref2_reg, src_reg); |
| ref3_reg = _mm512_sad_epu8(ref3_reg, src_reg); |
| // sum every ref[] |
| sum_ref0 = _mm512_add_epi32(sum_ref0, ref0_reg); |
| sum_ref1 = _mm512_add_epi32(sum_ref1, ref1_reg); |
| sum_ref2 = _mm512_add_epi32(sum_ref2, ref2_reg); |
| sum_ref3 = _mm512_add_epi32(sum_ref3, ref3_reg); |
| |
| src_ptr += src_stride; |
| ref0 += ref_stride; |
| ref1 += ref_stride; |
| ref2 += ref_stride; |
| ref3 += ref_stride; |
| } |
| { |
| __m256i sum256; |
| __m128i sum128; |
| // in sum_ref[] the result is saved in the first 4 bytes |
| // the other 4 bytes are zeroed. |
| // sum_ref1 and sum_ref3 are shifted left by 4 bytes |
| sum_ref1 = _mm512_bslli_epi128(sum_ref1, 4); |
| sum_ref3 = _mm512_bslli_epi128(sum_ref3, 4); |
| |
| // merge sum_ref0 and sum_ref1 also sum_ref2 and sum_ref3 |
| sum_ref0 = _mm512_or_si512(sum_ref0, sum_ref1); |
| sum_ref2 = _mm512_or_si512(sum_ref2, sum_ref3); |
| |
| // merge every 64 bit from each sum_ref[] |
| sum_mlow = _mm512_unpacklo_epi64(sum_ref0, sum_ref2); |
| sum_mhigh = _mm512_unpackhi_epi64(sum_ref0, sum_ref2); |
| |
| // add the low 64 bit to the high 64 bit |
| sum_mlow = _mm512_add_epi32(sum_mlow, sum_mhigh); |
| |
| // add the low 128 bit to the high 128 bit |
| sum256 = _mm256_add_epi32(_mm512_castsi512_si256(sum_mlow), |
| _mm512_extracti32x8_epi32(sum_mlow, 1)); |
| sum128 = _mm_add_epi32(_mm256_castsi256_si128(sum256), |
| _mm256_extractf128_si256(sum256, 1)); |
| |
| _mm_storeu_si128((__m128i *)(res), sum128); |
| } |
| } |