зеркало из https://github.com/mozilla/gecko-dev.git
59 строки
2.1 KiB
C
59 строки
2.1 KiB
C
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/*
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* Copyright (c) 2018, 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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#ifndef AOM_AOM_DSP_X86_OBMC_INTRINSIC_SSE4_H_
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#define AOM_AOM_DSP_X86_OBMC_INTRINSIC_SSE4_H_
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#include <smmintrin.h>
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#include "aom_dsp/x86/obmc_intrinsic_ssse3.h"
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static INLINE void obmc_variance_w4(const uint8_t *pre, const int pre_stride,
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const int32_t *wsrc, const int32_t *mask,
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unsigned int *const sse, int *const sum,
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const int h) {
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const int pre_step = pre_stride - 4;
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int n = 0;
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__m128i v_sum_d = _mm_setzero_si128();
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__m128i v_sse_d = _mm_setzero_si128();
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assert(IS_POWER_OF_TWO(h));
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do {
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const __m128i v_p_b = _mm_cvtsi32_si128(*(const uint32_t *)(pre + n));
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const __m128i v_m_d = _mm_load_si128((const __m128i *)(mask + n));
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const __m128i v_w_d = _mm_load_si128((const __m128i *)(wsrc + n));
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const __m128i v_p_d = _mm_cvtepu8_epi32(v_p_b);
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// Values in both pre and mask fit in 15 bits, and are packed at 32 bit
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// boundaries. We use pmaddwd, as it has lower latency on Haswell
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// than pmulld but produces the same result with these inputs.
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const __m128i v_pm_d = _mm_madd_epi16(v_p_d, v_m_d);
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const __m128i v_diff_d = _mm_sub_epi32(v_w_d, v_pm_d);
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const __m128i v_rdiff_d = xx_roundn_epi32(v_diff_d, 12);
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const __m128i v_sqrdiff_d = _mm_mullo_epi32(v_rdiff_d, v_rdiff_d);
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v_sum_d = _mm_add_epi32(v_sum_d, v_rdiff_d);
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v_sse_d = _mm_add_epi32(v_sse_d, v_sqrdiff_d);
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n += 4;
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if (n % 4 == 0) pre += pre_step;
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} while (n < 4 * h);
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*sum = xx_hsum_epi32_si32(v_sum_d);
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*sse = xx_hsum_epi32_si32(v_sse_d);
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}
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#endif // AOM_AOM_DSP_X86_OBMC_INTRINSIC_SSE4_H_
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