76 lines
2.5 KiB
C
76 lines
2.5 KiB
C
/*
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* Copyright (c) 2021, Alliance for Open Media. All rights reserved
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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#include <emmintrin.h> // SSE2
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#include "config/av1_rtcd.h"
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#include "aom/aom_integer.h"
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static AOM_INLINE __m128i reduce_sum_epi64(__m128i reg) {
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__m128i reg_hi = _mm_srli_si128(reg, 8);
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reg = _mm_add_epi64(reg, reg_hi);
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return reg;
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}
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int64_t av1_block_error_lp_sse2(const int16_t *coeff, const int16_t *dqcoeff,
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intptr_t block_size) {
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assert(block_size % 16 == 0);
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assert(block_size >= 16);
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const __m128i zero = _mm_setzero_si128();
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__m128i accum_0 = zero;
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__m128i accum_1 = zero;
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for (int i = 0; i < block_size; i += 16) {
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// Load 8 elements for coeff and dqcoeff.
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const __m128i _coeff_0 = _mm_loadu_si128((const __m128i *)coeff);
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const __m128i _coeff_1 = _mm_loadu_si128((const __m128i *)(coeff + 8));
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const __m128i _dqcoeff_0 = _mm_loadu_si128((const __m128i *)dqcoeff);
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const __m128i _dqcoeff_1 = _mm_loadu_si128((const __m128i *)(dqcoeff + 8));
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// Compute the diff
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const __m128i diff_0 = _mm_sub_epi16(_dqcoeff_0, _coeff_0);
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const __m128i diff_1 = _mm_sub_epi16(_dqcoeff_1, _coeff_1);
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// Compute the error
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const __m128i error_0 = _mm_madd_epi16(diff_0, diff_0);
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const __m128i error_1 = _mm_madd_epi16(diff_1, diff_1);
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const __m128i error_lo_0 = _mm_unpacklo_epi32(error_0, zero);
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const __m128i error_lo_1 = _mm_unpacklo_epi32(error_1, zero);
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const __m128i error_hi_0 = _mm_unpackhi_epi32(error_0, zero);
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const __m128i error_hi_1 = _mm_unpackhi_epi32(error_1, zero);
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// Accumulate
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accum_0 = _mm_add_epi64(accum_0, error_lo_0);
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accum_1 = _mm_add_epi64(accum_1, error_lo_1);
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accum_0 = _mm_add_epi64(accum_0, error_hi_0);
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accum_1 = _mm_add_epi64(accum_1, error_hi_1);
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// Advance
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coeff += 16;
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dqcoeff += 16;
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}
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__m128i accum = _mm_add_epi64(accum_0, accum_1);
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// Reduce sum the register
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accum = reduce_sum_epi64(accum);
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// Store the results.
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#if ARCH_X86_64
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return _mm_cvtsi128_si64(accum);
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#else
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int64_t result;
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_mm_storel_epi64((__m128i *)&result, accum);
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return result;
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#endif // ARCH_X86_64
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}
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