masked_variance_intrin_ssse3.h

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/*

 * Copyright (c) 2018, Alliance for Open Media. All rights reserved.

 * This source code is subject to the terms of the BSD 2 Clause License and

 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License

 * was not distributed with this source code in the LICENSE file, you can

 * obtain it at www.aomedia.org/license/software. If the Alliance for Open

 * Media Patent License 1.0 was not distributed with this source code in the

 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.

*/

#ifndef AOM_AOM_DSP_X86_MASKED_VARIANCE_INTRIN_SSSE3_H_

#define AOM_AOM_DSP_X86_MASKED_VARIANCE_INTRIN_SSSE3_H_

#include <stdlib.h>

#include <string.h>

#include <tmmintrin.h>

#include "config/aom_config.h"

#include "config/aom_dsp_rtcd.h"

#include "aom_dsp/blend.h"

static inline void comp_mask_pred_16_ssse3(const uint8_t *src0,

                                           const uint8_t *src1,

                                           const uint8_t *mask, uint8_t *dst) {

  const __m128i alpha_max = _mm_set1_epi8(AOM_BLEND_A64_MAX_ALPHA);

  const __m128i round_offset =

      _mm_set1_epi16(1 << (15 - AOM_BLEND_A64_ROUND_BITS));

  const __m128i sA0 = _mm_lddqu_si128((const __m128i *)(src0));

  const __m128i sA1 = _mm_lddqu_si128((const __m128i *)(src1));

  const __m128i aA = _mm_load_si128((const __m128i *)(mask));

  const __m128i maA = _mm_sub_epi8(alpha_max, aA);

  const __m128i ssAL = _mm_unpacklo_epi8(sA0, sA1);

  const __m128i aaAL = _mm_unpacklo_epi8(aA, maA);

  const __m128i ssAH = _mm_unpackhi_epi8(sA0, sA1);

  const __m128i aaAH = _mm_unpackhi_epi8(aA, maA);

  const __m128i blendAL = _mm_maddubs_epi16(ssAL, aaAL);

  const __m128i blendAH = _mm_maddubs_epi16(ssAH, aaAH);

  const __m128i roundAL = _mm_mulhrs_epi16(blendAL, round_offset);

  const __m128i roundAH = _mm_mulhrs_epi16(blendAH, round_offset);

  _mm_store_si128((__m128i *)dst, _mm_packus_epi16(roundAL, roundAH));

static inline void comp_mask_pred_8_ssse3(uint8_t *comp_pred, int height,

                                          const uint8_t *src0, int stride0,

                                          const uint8_t *src1, int stride1,

                                          const uint8_t *mask,

                                          int mask_stride) {

  int i = 0;

  const __m128i alpha_max = _mm_set1_epi8(AOM_BLEND_A64_MAX_ALPHA);

  const __m128i round_offset =

      _mm_set1_epi16(1 << (15 - AOM_BLEND_A64_ROUND_BITS));

  do {

    // odd line A

    const __m128i sA0 = _mm_loadl_epi64((const __m128i *)(src0));

    const __m128i sA1 = _mm_loadl_epi64((const __m128i *)(src1));

    const __m128i aA = _mm_loadl_epi64((const __m128i *)(mask));

    // even line B

    const __m128i sB0 = _mm_loadl_epi64((const __m128i *)(src0 + stride0));

    const __m128i sB1 = _mm_loadl_epi64((const __m128i *)(src1 + stride1));

    const __m128i a = _mm_castps_si128(_mm_loadh_pi(

        _mm_castsi128_ps(aA), (const __m64 *)(mask + mask_stride)));

    const __m128i ssA = _mm_unpacklo_epi8(sA0, sA1);

    const __m128i ssB = _mm_unpacklo_epi8(sB0, sB1);

    const __m128i ma = _mm_sub_epi8(alpha_max, a);

    const __m128i aaA = _mm_unpacklo_epi8(a, ma);

    const __m128i aaB = _mm_unpackhi_epi8(a, ma);

    const __m128i blendA = _mm_maddubs_epi16(ssA, aaA);

    const __m128i blendB = _mm_maddubs_epi16(ssB, aaB);

    const __m128i roundA = _mm_mulhrs_epi16(blendA, round_offset);

    const __m128i roundB = _mm_mulhrs_epi16(blendB, round_offset);

    const __m128i round = _mm_packus_epi16(roundA, roundB);

    // comp_pred's stride == width == 8

    _mm_store_si128((__m128i *)(comp_pred), round);

    comp_pred += (8 << 1);

    src0 += (stride0 << 1);

    src1 += (stride1 << 1);

    mask += (mask_stride << 1);

    i += 2;

  } while (i < height);

#endif  // AOM_AOM_DSP_X86_MASKED_VARIANCE_INTRIN_SSSE3_H_