108 lines
4.4 KiB
C
108 lines
4.4 KiB
C
/*
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* Copyright (c) 2014 The WebM project authors. All Rights Reserved.
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*
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* Usee of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <assert.h>
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#include <immintrin.h>
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#include "./vp9_rtcd.h"
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#include "vpx/vpx_integer.h"
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#include "vpx_dsp/vpx_dsp_common.h"
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#include "vpx_dsp/x86/bitdepth_conversion_avx2.h"
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int64_t vp9_block_error_avx2(const tran_low_t *coeff, const tran_low_t *dqcoeff,
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intptr_t block_size, int64_t *ssz) {
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__m256i sse_256, ssz_256;
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__m256i exp_dqcoeff_lo, exp_dqcoeff_hi, exp_coeff_lo, exp_coeff_hi;
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__m256i sse_hi, ssz_hi;
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__m128i sse_128, ssz_128;
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int64_t sse;
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const __m256i zero = _mm256_setzero_si256();
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// If the block size is 16 then the results will fit in 32 bits.
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if (block_size == 16) {
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__m256i coeff_256, dqcoeff_256, coeff_hi, dqcoeff_hi;
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// Load 16 elements for coeff and dqcoeff.
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coeff_256 = load_tran_low(coeff);
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dqcoeff_256 = load_tran_low(dqcoeff);
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// dqcoeff - coeff
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dqcoeff_256 = _mm256_sub_epi16(dqcoeff_256, coeff_256);
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// madd (dqcoeff - coeff)
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dqcoeff_256 = _mm256_madd_epi16(dqcoeff_256, dqcoeff_256);
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// madd coeff
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coeff_256 = _mm256_madd_epi16(coeff_256, coeff_256);
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// Save the higher 64 bit of each 128 bit lane.
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dqcoeff_hi = _mm256_srli_si256(dqcoeff_256, 8);
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coeff_hi = _mm256_srli_si256(coeff_256, 8);
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// Add the higher 64 bit to the low 64 bit.
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dqcoeff_256 = _mm256_add_epi32(dqcoeff_256, dqcoeff_hi);
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coeff_256 = _mm256_add_epi32(coeff_256, coeff_hi);
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// Expand each double word in the lower 64 bits to quad word.
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sse_256 = _mm256_unpacklo_epi32(dqcoeff_256, zero);
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ssz_256 = _mm256_unpacklo_epi32(coeff_256, zero);
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} else {
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int i;
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assert(block_size % 32 == 0);
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sse_256 = zero;
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ssz_256 = zero;
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for (i = 0; i < block_size; i += 32) {
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__m256i coeff_0, coeff_1, dqcoeff_0, dqcoeff_1;
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// Load 32 elements for coeff and dqcoeff.
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coeff_0 = load_tran_low(coeff + i);
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dqcoeff_0 = load_tran_low(dqcoeff + i);
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coeff_1 = load_tran_low(coeff + i + 16);
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dqcoeff_1 = load_tran_low(dqcoeff + i + 16);
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// dqcoeff - coeff
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dqcoeff_0 = _mm256_sub_epi16(dqcoeff_0, coeff_0);
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dqcoeff_1 = _mm256_sub_epi16(dqcoeff_1, coeff_1);
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// madd (dqcoeff - coeff)
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dqcoeff_0 = _mm256_madd_epi16(dqcoeff_0, dqcoeff_0);
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dqcoeff_1 = _mm256_madd_epi16(dqcoeff_1, dqcoeff_1);
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// madd coeff
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coeff_0 = _mm256_madd_epi16(coeff_0, coeff_0);
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coeff_1 = _mm256_madd_epi16(coeff_1, coeff_1);
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// Add the first madd (dqcoeff - coeff) with the second.
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dqcoeff_0 = _mm256_add_epi32(dqcoeff_0, dqcoeff_1);
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// Add the first madd (coeff) with the second.
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coeff_0 = _mm256_add_epi32(coeff_0, coeff_1);
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// Expand each double word of madd (dqcoeff - coeff) to quad word.
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exp_dqcoeff_lo = _mm256_unpacklo_epi32(dqcoeff_0, zero);
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exp_dqcoeff_hi = _mm256_unpackhi_epi32(dqcoeff_0, zero);
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// expand each double word of madd (coeff) to quad word
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exp_coeff_lo = _mm256_unpacklo_epi32(coeff_0, zero);
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exp_coeff_hi = _mm256_unpackhi_epi32(coeff_0, zero);
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// Add each quad word of madd (dqcoeff - coeff) and madd (coeff).
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sse_256 = _mm256_add_epi64(sse_256, exp_dqcoeff_lo);
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ssz_256 = _mm256_add_epi64(ssz_256, exp_coeff_lo);
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sse_256 = _mm256_add_epi64(sse_256, exp_dqcoeff_hi);
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ssz_256 = _mm256_add_epi64(ssz_256, exp_coeff_hi);
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}
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}
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// Save the higher 64 bit of each 128 bit lane.
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sse_hi = _mm256_srli_si256(sse_256, 8);
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ssz_hi = _mm256_srli_si256(ssz_256, 8);
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// Add the higher 64 bit to the low 64 bit.
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sse_256 = _mm256_add_epi64(sse_256, sse_hi);
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ssz_256 = _mm256_add_epi64(ssz_256, ssz_hi);
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// Add each 64 bit from each of the 128 bit lane of the 256 bit.
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sse_128 = _mm_add_epi64(_mm256_castsi256_si128(sse_256),
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_mm256_extractf128_si256(sse_256, 1));
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ssz_128 = _mm_add_epi64(_mm256_castsi256_si128(ssz_256),
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_mm256_extractf128_si256(ssz_256, 1));
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// Store the results.
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_mm_storel_epi64((__m128i *)(&sse), sse_128);
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_mm_storel_epi64((__m128i *)(ssz), ssz_128);
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return sse;
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}
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