/*

 * 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.

 */

#include <immintrin.h>

#include "config/av1_rtcd.h"

#include "aom/aom_integer.h"

#include "aom_dsp/blend.h"

#include "aom_dsp/x86/synonyms.h"

#include "aom_dsp/x86/synonyms_avx2.h"

#include "av1/common/blockd.h"

static INLINE __m256i calc_mask_avx2(const __m256i mask_base, const __m256i s0,

                                     const __m256i s1) {

  const __m256i diff = _mm256_abs_epi16(_mm256_sub_epi16(s0, s1));

  return _mm256_abs_epi16(

      _mm256_add_epi16(mask_base, _mm256_srli_epi16(diff, 4)));

  // clamp(diff, 0, 64) can be skiped for diff is always in the range ( 38, 54)

}

void av1_build_compound_diffwtd_mask_avx2(uint8_t *mask,

                                          DIFFWTD_MASK_TYPE mask_type,

                                          const uint8_t *src0, int src0_stride,

                                          const uint8_t *src1, int src1_stride,

                                          int h, int w) {

  const int mb = (mask_type == DIFFWTD_38_INV) ? AOM_BLEND_A64_MAX_ALPHA : 0;

  const __m256i y_mask_base = _mm256_set1_epi16(38 - mb);

  int i = 0;

  if (4 == w) {

    do {

      const __m128i s0A = xx_loadl_32(src0);

      const __m128i s0B = xx_loadl_32(src0 + src0_stride);

      const __m128i s0C = xx_loadl_32(src0 + src0_stride * 2);

      const __m128i s0D = xx_loadl_32(src0 + src0_stride * 3);

      const __m128i s0AB = _mm_unpacklo_epi32(s0A, s0B);

      const __m128i s0CD = _mm_unpacklo_epi32(s0C, s0D);

      const __m128i s0ABCD = _mm_unpacklo_epi64(s0AB, s0CD);

      const __m256i s0ABCD_w = _mm256_cvtepu8_epi16(s0ABCD);

      const __m128i s1A = xx_loadl_32(src1);

      const __m128i s1B = xx_loadl_32(src1 + src1_stride);

      const __m128i s1C = xx_loadl_32(src1 + src1_stride * 2);

      const __m128i s1D = xx_loadl_32(src1 + src1_stride * 3);

      const __m128i s1AB = _mm_unpacklo_epi32(s1A, s1B);

      const __m128i s1CD = _mm_unpacklo_epi32(s1C, s1D);

      const __m128i s1ABCD = _mm_unpacklo_epi64(s1AB, s1CD);

      const __m256i s1ABCD_w = _mm256_cvtepu8_epi16(s1ABCD);

      const __m256i m16 = calc_mask_avx2(y_mask_base, s0ABCD_w, s1ABCD_w);

      const __m256i m8 = _mm256_packus_epi16(m16, _mm256_setzero_si256());

      const __m128i x_m8 =

          _mm256_castsi256_si128(_mm256_permute4x64_epi64(m8, 0xd8));

      xx_storeu_128(mask, x_m8);

      src0 += (src0_stride << 2);

      src1 += (src1_stride << 2);

      mask += 16;

      i += 4;

    } while (i < h);

  } else if (8 == w) {

    do {

      const __m128i s0A = xx_loadl_64(src0);

      const __m128i s0B = xx_loadl_64(src0 + src0_stride);

      const __m128i s0C = xx_loadl_64(src0 + src0_stride * 2);

      const __m128i s0D = xx_loadl_64(src0 + src0_stride * 3);

      const __m256i s0AC_w = _mm256_cvtepu8_epi16(_mm_unpacklo_epi64(s0A, s0C));

      const __m256i s0BD_w = _mm256_cvtepu8_epi16(_mm_unpacklo_epi64(s0B, s0D));

      const __m128i s1A = xx_loadl_64(src1);

      const __m128i s1B = xx_loadl_64(src1 + src1_stride);

      const __m128i s1C = xx_loadl_64(src1 + src1_stride * 2);

      const __m128i s1D = xx_loadl_64(src1 + src1_stride * 3);

      const __m256i s1AB_w = _mm256_cvtepu8_epi16(_mm_unpacklo_epi64(s1A, s1C));

      const __m256i s1CD_w = _mm256_cvtepu8_epi16(_mm_unpacklo_epi64(s1B, s1D));

      const __m256i m16AC = calc_mask_avx2(y_mask_base, s0AC_w, s1AB_w);

      const __m256i m16BD = calc_mask_avx2(y_mask_base, s0BD_w, s1CD_w);

      const __m256i m8 = _mm256_packus_epi16(m16AC, m16BD);

      yy_storeu_256(mask, m8);

      src0 += src0_stride << 2;

      src1 += src1_stride << 2;

      mask += 32;

      i += 4;

    } while (i < h);

  } else if (16 == w) {

    do {

      const __m128i s0A = xx_load_128(src0);

      const __m128i s0B = xx_load_128(src0 + src0_stride);

      const __m128i s1A = xx_load_128(src1);

      const __m128i s1B = xx_load_128(src1 + src1_stride);

      const __m256i s0AL = _mm256_cvtepu8_epi16(s0A);

      const __m256i s0BL = _mm256_cvtepu8_epi16(s0B);

      const __m256i s1AL = _mm256_cvtepu8_epi16(s1A);

      const __m256i s1BL = _mm256_cvtepu8_epi16(s1B);

      const __m256i m16AL = calc_mask_avx2(y_mask_base, s0AL, s1AL);

      const __m256i m16BL = calc_mask_avx2(y_mask_base, s0BL, s1BL);

      const __m256i m8 =

          _mm256_permute4x64_epi64(_mm256_packus_epi16(m16AL, m16BL), 0xd8);

      yy_storeu_256(mask, m8);

      src0 += src0_stride << 1;

      src1 += src1_stride << 1;

      mask += 32;

      i += 2;

    } while (i < h);

  } else {

    do {

      int j = 0;

      do {

        const __m256i s0 = yy_loadu_256(src0 + j);

        const __m256i s1 = yy_loadu_256(src1 + j);

        const __m256i s0L = _mm256_cvtepu8_epi16(_mm256_castsi256_si128(s0));

        const __m256i s1L = _mm256_cvtepu8_epi16(_mm256_castsi256_si128(s1));

        const __m256i s0H =

            _mm256_cvtepu8_epi16(_mm256_extracti128_si256(s0, 1));

        const __m256i s1H =

            _mm256_cvtepu8_epi16(_mm256_extracti128_si256(s1, 1));

        const __m256i m16L = calc_mask_avx2(y_mask_base, s0L, s1L);

        const __m256i m16H = calc_mask_avx2(y_mask_base, s0H, s1H);

        const __m256i m8 =

            _mm256_permute4x64_epi64(_mm256_packus_epi16(m16L, m16H), 0xd8);

        yy_storeu_256(mask + j, m8);

        j += 32;

      } while (j < w);

      src0 += src0_stride;

      src1 += src1_stride;

      mask += w;

      i += 1;

    } while (i < h);

  }

}

static INLINE __m256i calc_mask_d16_avx2(const __m256i *data_src0,

                                         const __m256i *data_src1,

                                         const __m256i *round_const,

                                         const __m256i *mask_base_16,

                                         const __m256i *clip_diff, int round) {

  const __m256i diffa = _mm256_subs_epu16(*data_src0, *data_src1);

  const __m256i diffb = _mm256_subs_epu16(*data_src1, *data_src0);

  const __m256i diff = _mm256_max_epu16(diffa, diffb);

  const __m256i diff_round =

      _mm256_srli_epi16(_mm256_adds_epu16(diff, *round_const), round);

  const __m256i diff_factor = _mm256_srli_epi16(diff_round, DIFF_FACTOR_LOG2);

  const __m256i diff_mask = _mm256_adds_epi16(diff_factor, *mask_base_16);

  const __m256i diff_clamp = _mm256_min_epi16(diff_mask, *clip_diff);

  return diff_clamp;

}

static INLINE __m256i calc_mask_d16_inv_avx2(const __m256i *data_src0,

                                             const __m256i *data_src1,

                                             const __m256i *round_const,

                                             const __m256i *mask_base_16,

                                             const __m256i *clip_diff,

                                             int round) {

  const __m256i diffa = _mm256_subs_epu16(*data_src0, *data_src1);

  const __m256i diffb = _mm256_subs_epu16(*data_src1, *data_src0);

  const __m256i diff = _mm256_max_epu16(diffa, diffb);

  const __m256i diff_round =

      _mm256_srli_epi16(_mm256_adds_epu16(diff, *round_const), round);

  const __m256i diff_factor = _mm256_srli_epi16(diff_round, DIFF_FACTOR_LOG2);

  const __m256i diff_mask = _mm256_adds_epi16(diff_factor, *mask_base_16);

  const __m256i diff_clamp = _mm256_min_epi16(diff_mask, *clip_diff);

  const __m256i diff_const_16 = _mm256_sub_epi16(*clip_diff, diff_clamp);

  return diff_const_16;

}

static INLINE void build_compound_diffwtd_mask_d16_avx2(

    uint8_t *mask, const CONV_BUF_TYPE *src0, int src0_stride,

    const CONV_BUF_TYPE *src1, int src1_stride, int h, int w, int shift) {

  const int mask_base = 38;

  const __m256i _r = _mm256_set1_epi16((1 << shift) >> 1);

  const __m256i y38 = _mm256_set1_epi16(mask_base);

  const __m256i y64 = _mm256_set1_epi16(AOM_BLEND_A64_MAX_ALPHA);

  int i = 0;

  if (w == 4) {

    do {

      const __m128i s0A = xx_loadl_64(src0);

      const __m128i s0B = xx_loadl_64(src0 + src0_stride);

      const __m128i s0C = xx_loadl_64(src0 + src0_stride * 2);

      const __m128i s0D = xx_loadl_64(src0 + src0_stride * 3);

      const __m128i s1A = xx_loadl_64(src1);

      const __m128i s1B = xx_loadl_64(src1 + src1_stride);

      const __m128i s1C = xx_loadl_64(src1 + src1_stride * 2);

      const __m128i s1D = xx_loadl_64(src1 + src1_stride * 3);

      const __m256i s0 = yy_set_m128i(_mm_unpacklo_epi64(s0C, s0D),

                                      _mm_unpacklo_epi64(s0A, s0B));

      const __m256i s1 = yy_set_m128i(_mm_unpacklo_epi64(s1C, s1D),

                                      _mm_unpacklo_epi64(s1A, s1B));

      const __m256i m16 = calc_mask_d16_avx2(&s0, &s1, &_r, &y38, &y64, shift);

      const __m256i m8 = _mm256_packus_epi16(m16, _mm256_setzero_si256());

      xx_storeu_128(mask,

                    _mm256_castsi256_si128(_mm256_permute4x64_epi64(m8, 0xd8)));

      src0 += src0_stride << 2;

      src1 += src1_stride << 2;

      mask += 16;

      i += 4;

    } while (i < h);

  } else if (w == 8) {

    do {

      const __m256i s0AB = yy_loadu2_128(src0 + src0_stride, src0);

      const __m256i s0CD =

          yy_loadu2_128(src0 + src0_stride * 3, src0 + src0_stride * 2);

      const __m256i s1AB = yy_loadu2_128(src1 + src1_stride, src1);

      const __m256i s1CD =

          yy_loadu2_128(src1 + src1_stride * 3, src1 + src1_stride * 2);

      const __m256i m16AB =

          calc_mask_d16_avx2(&s0AB, &s1AB, &_r, &y38, &y64, shift);

      const __m256i m16CD =

          calc_mask_d16_avx2(&s0CD, &s1CD, &_r, &y38, &y64, shift);

      const __m256i m8 = _mm256_packus_epi16(m16AB, m16CD);

      yy_storeu_256(mask, _mm256_permute4x64_epi64(m8, 0xd8));

      src0 += src0_stride << 2;

      src1 += src1_stride << 2;

      mask += 32;

      i += 4;

    } while (i < h);

  } else if (w == 16) {

    do {

      const __m256i s0A = yy_loadu_256(src0);

      const __m256i s0B = yy_loadu_256(src0 + src0_stride);

      const __m256i s1A = yy_loadu_256(src1);

      const __m256i s1B = yy_loadu_256(src1 + src1_stride);

      const __m256i m16A =

          calc_mask_d16_avx2(&s0A, &s1A, &_r, &y38, &y64, shift);

      const __m256i m16B =

          calc_mask_d16_avx2(&s0B, &s1B, &_r, &y38, &y64, shift);

      const __m256i m8 = _mm256_packus_epi16(m16A, m16B);

      yy_storeu_256(mask, _mm256_permute4x64_epi64(m8, 0xd8));

      src0 += src0_stride << 1;

      src1 += src1_stride << 1;

      mask += 32;

      i += 2;

    } while (i < h);

  } else if (w == 32) {

    do {

      const __m256i s0A = yy_loadu_256(src0);

      const __m256i s0B = yy_loadu_256(src0 + 16);

      const __m256i s1A = yy_loadu_256(src1);

      const __m256i s1B = yy_loadu_256(src1 + 16);

      const __m256i m16A =

          calc_mask_d16_avx2(&s0A, &s1A, &_r, &y38, &y64, shift);

      const __m256i m16B =

          calc_mask_d16_avx2(&s0B, &s1B, &_r, &y38, &y64, shift);

      const __m256i m8 = _mm256_packus_epi16(m16A, m16B);

      yy_storeu_256(mask, _mm256_permute4x64_epi64(m8, 0xd8));

      src0 += src0_stride;

      src1 += src1_stride;

      mask += 32;

      i += 1;

    } while (i < h);

  } else if (w == 64) {

    do {

      const __m256i s0A = yy_loadu_256(src0);

      const __m256i s0B = yy_loadu_256(src0 + 16);

      const __m256i s0C = yy_loadu_256(src0 + 32);

      const __m256i s0D = yy_loadu_256(src0 + 48);

      const __m256i s1A = yy_loadu_256(src1);

      const __m256i s1B = yy_loadu_256(src1 + 16);

      const __m256i s1C = yy_loadu_256(src1 + 32);

      const __m256i s1D = yy_loadu_256(src1 + 48);

      const __m256i m16A =

          calc_mask_d16_avx2(&s0A, &s1A, &_r, &y38, &y64, shift);

      const __m256i m16B =

          calc_mask_d16_avx2(&s0B, &s1B, &_r, &y38, &y64, shift);

      const __m256i m16C =

          calc_mask_d16_avx2(&s0C, &s1C, &_r, &y38, &y64, shift);

      const __m256i m16D =

          calc_mask_d16_avx2(&s0D, &s1D, &_r, &y38, &y64, shift);

      const __m256i m8AB = _mm256_packus_epi16(m16A, m16B);

      const __m256i m8CD = _mm256_packus_epi16(m16C, m16D);

      yy_storeu_256(mask, _mm256_permute4x64_epi64(m8AB, 0xd8));

      yy_storeu_256(mask + 32, _mm256_permute4x64_epi64(m8CD, 0xd8));

      src0 += src0_stride;

      src1 += src1_stride;

      mask += 64;

      i += 1;

    } while (i < h);

  } else {

    do {

      const __m256i s0A = yy_loadu_256(src0);

      const __m256i s0B = yy_loadu_256(src0 + 16);

      const __m256i s0C = yy_loadu_256(src0 + 32);

      const __m256i s0D = yy_loadu_256(src0 + 48);

      const __m256i s0E = yy_loadu_256(src0 + 64);

      const __m256i s0F = yy_loadu_256(src0 + 80);

      const __m256i s0G = yy_loadu_256(src0 + 96);

      const __m256i s0H = yy_loadu_256(src0 + 112);

      const __m256i s1A = yy_loadu_256(src1);

      const __m256i s1B = yy_loadu_256(src1 + 16);

      const __m256i s1C = yy_loadu_256(src1 + 32);

      const __m256i s1D = yy_loadu_256(src1 + 48);

      const __m256i s1E = yy_loadu_256(src1 + 64);

      const __m256i s1F = yy_loadu_256(src1 + 80);

      const __m256i s1G = yy_loadu_256(src1 + 96);

      const __m256i s1H = yy_loadu_256(src1 + 112);

      const __m256i m16A =

          calc_mask_d16_avx2(&s0A, &s1A, &_r, &y38, &y64, shift);

      const __m256i m16B =

          calc_mask_d16_avx2(&s0B, &s1B, &_r, &y38, &y64, shift);

      const __m256i m16C =

          calc_mask_d16_avx2(&s0C, &s1C, &_r, &y38, &y64, shift);

      const __m256i m16D =

          calc_mask_d16_avx2(&s0D, &s1D, &_r, &y38, &y64, shift);

      const __m256i m16E =

          calc_mask_d16_avx2(&s0E, &s1E, &_r, &y38, &y64, shift);

      const __m256i m16F =

          calc_mask_d16_avx2(&s0F, &s1F, &_r, &y38, &y64, shift);

      const __m256i m16G =

          calc_mask_d16_avx2(&s0G, &s1G, &_r, &y38, &y64, shift);

      const __m256i m16H =

          calc_mask_d16_avx2(&s0H, &s1H, &_r, &y38, &y64, shift);

      const __m256i m8AB = _mm256_packus_epi16(m16A, m16B);

      const __m256i m8CD = _mm256_packus_epi16(m16C, m16D);

      const __m256i m8EF = _mm256_packus_epi16(m16E, m16F);

      const __m256i m8GH = _mm256_packus_epi16(m16G, m16H);

      yy_storeu_256(mask, _mm256_permute4x64_epi64(m8AB, 0xd8));

      yy_storeu_256(mask + 32, _mm256_permute4x64_epi64(m8CD, 0xd8));

      yy_storeu_256(mask + 64, _mm256_permute4x64_epi64(m8EF, 0xd8));

      yy_storeu_256(mask + 96, _mm256_permute4x64_epi64(m8GH, 0xd8));

      src0 += src0_stride;

      src1 += src1_stride;

      mask += 128;

      i += 1;

    } while (i < h);

  }

}

static INLINE void build_compound_diffwtd_mask_d16_inv_avx2(

    uint8_t *mask, const CONV_BUF_TYPE *src0, int src0_stride,

    const CONV_BUF_TYPE *src1, int src1_stride, int h, int w, int shift) {

  const int mask_base = 38;

  const __m256i _r = _mm256_set1_epi16((1 << shift) >> 1);

  const __m256i y38 = _mm256_set1_epi16(mask_base);

  const __m256i y64 = _mm256_set1_epi16(AOM_BLEND_A64_MAX_ALPHA);

  int i = 0;

  if (w == 4) {

    do {

      const __m128i s0A = xx_loadl_64(src0);

      const __m128i s0B = xx_loadl_64(src0 + src0_stride);

      const __m128i s0C = xx_loadl_64(src0 + src0_stride * 2);

      const __m128i s0D = xx_loadl_64(src0 + src0_stride * 3);

      const __m128i s1A = xx_loadl_64(src1);

      const __m128i s1B = xx_loadl_64(src1 + src1_stride);

      const __m128i s1C = xx_loadl_64(src1 + src1_stride * 2);

      const __m128i s1D = xx_loadl_64(src1 + src1_stride * 3);

      const __m256i s0 = yy_set_m128i(_mm_unpacklo_epi64(s0C, s0D),

                                      _mm_unpacklo_epi64(s0A, s0B));

      const __m256i s1 = yy_set_m128i(_mm_unpacklo_epi64(s1C, s1D),

                                      _mm_unpacklo_epi64(s1A, s1B));

      const __m256i m16 =

          calc_mask_d16_inv_avx2(&s0, &s1, &_r, &y38, &y64, shift);

      const __m256i m8 = _mm256_packus_epi16(m16, _mm256_setzero_si256());

      xx_storeu_128(mask,

                    _mm256_castsi256_si128(_mm256_permute4x64_epi64(m8, 0xd8)));

      src0 += src0_stride << 2;

      src1 += src1_stride << 2;

      mask += 16;

      i += 4;

    } while (i < h);

  } else if (w == 8) {

    do {

      const __m256i s0AB = yy_loadu2_128(src0 + src0_stride, src0);

      const __m256i s0CD =

          yy_loadu2_128(src0 + src0_stride * 3, src0 + src0_stride * 2);

      const __m256i s1AB = yy_loadu2_128(src1 + src1_stride, src1);

      const __m256i s1CD =

          yy_loadu2_128(src1 + src1_stride * 3, src1 + src1_stride * 2);

      const __m256i m16AB =

          calc_mask_d16_inv_avx2(&s0AB, &s1AB, &_r, &y38, &y64, shift);

      const __m256i m16CD =

          calc_mask_d16_inv_avx2(&s0CD, &s1CD, &_r, &y38, &y64, shift);

      const __m256i m8 = _mm256_packus_epi16(m16AB, m16CD);

      yy_storeu_256(mask, _mm256_permute4x64_epi64(m8, 0xd8));

      src0 += src0_stride << 2;

      src1 += src1_stride << 2;

      mask += 32;

      i += 4;

    } while (i < h);

  } else if (w == 16) {

    do {

      const __m256i s0A = yy_loadu_256(src0);

      const __m256i s0B = yy_loadu_256(src0 + src0_stride);

      const __m256i s1A = yy_loadu_256(src1);

      const __m256i s1B = yy_loadu_256(src1 + src1_stride);

      const __m256i m16A =

          calc_mask_d16_inv_avx2(&s0A, &s1A, &_r, &y38, &y64, shift);

      const __m256i m16B =

          calc_mask_d16_inv_avx2(&s0B, &s1B, &_r, &y38, &y64, shift);

      const __m256i m8 = _mm256_packus_epi16(m16A, m16B);

      yy_storeu_256(mask, _mm256_permute4x64_epi64(m8, 0xd8));

      src0 += src0_stride << 1;

      src1 += src1_stride << 1;

      mask += 32;

      i += 2;

    } while (i < h);

  } else if (w == 32) {

    do {

      const __m256i s0A = yy_loadu_256(src0);

      const __m256i s0B = yy_loadu_256(src0 + 16);

      const __m256i s1A = yy_loadu_256(src1);

      const __m256i s1B = yy_loadu_256(src1 + 16);

      const __m256i m16A =

          calc_mask_d16_inv_avx2(&s0A, &s1A, &_r, &y38, &y64, shift);

      const __m256i m16B =

          calc_mask_d16_inv_avx2(&s0B, &s1B, &_r, &y38, &y64, shift);

      const __m256i m8 = _mm256_packus_epi16(m16A, m16B);

      yy_storeu_256(mask, _mm256_permute4x64_epi64(m8, 0xd8));

      src0 += src0_stride;

      src1 += src1_stride;

      mask += 32;

      i += 1;

    } while (i < h);

  } else if (w == 64) {

    do {

      const __m256i s0A = yy_loadu_256(src0);

      const __m256i s0B = yy_loadu_256(src0 + 16);

      const __m256i s0C = yy_loadu_256(src0 + 32);

      const __m256i s0D = yy_loadu_256(src0 + 48);

      const __m256i s1A = yy_loadu_256(src1);

      const __m256i s1B = yy_loadu_256(src1 + 16);

      const __m256i s1C = yy_loadu_256(src1 + 32);

      const __m256i s1D = yy_loadu_256(src1 + 48);

      const __m256i m16A =

          calc_mask_d16_inv_avx2(&s0A, &s1A, &_r, &y38, &y64, shift);

      const __m256i m16B =

          calc_mask_d16_inv_avx2(&s0B, &s1B, &_r, &y38, &y64, shift);

      const __m256i m16C =

          calc_mask_d16_inv_avx2(&s0C, &s1C, &_r, &y38, &y64, shift);

      const __m256i m16D =

          calc_mask_d16_inv_avx2(&s0D, &s1D, &_r, &y38, &y64, shift);

      const __m256i m8AB = _mm256_packus_epi16(m16A, m16B);

      const __m256i m8CD = _mm256_packus_epi16(m16C, m16D);

      yy_storeu_256(mask, _mm256_permute4x64_epi64(m8AB, 0xd8));

      yy_storeu_256(mask + 32, _mm256_permute4x64_epi64(m8CD, 0xd8));

      src0 += src0_stride;

      src1 += src1_stride;

      mask += 64;

      i += 1;

    } while (i < h);

  } else {

    do {

      const __m256i s0A = yy_loadu_256(src0);

      const __m256i s0B = yy_loadu_256(src0 + 16);

      const __m256i s0C = yy_loadu_256(src0 + 32);

      const __m256i s0D = yy_loadu_256(src0 + 48);

      const __m256i s0E = yy_loadu_256(src0 + 64);

      const __m256i s0F = yy_loadu_256(src0 + 80);

      const __m256i s0G = yy_loadu_256(src0 + 96);

      const __m256i s0H = yy_loadu_256(src0 + 112);

      const __m256i s1A = yy_loadu_256(src1);

      const __m256i s1B = yy_loadu_256(src1 + 16);

      const __m256i s1C = yy_loadu_256(src1 + 32);

      const __m256i s1D = yy_loadu_256(src1 + 48);

      const __m256i s1E = yy_loadu_256(src1 + 64);

      const __m256i s1F = yy_loadu_256(src1 + 80);

      const __m256i s1G = yy_loadu_256(src1 + 96);

      const __m256i s1H = yy_loadu_256(src1 + 112);

      const __m256i m16A =

          calc_mask_d16_inv_avx2(&s0A, &s1A, &_r, &y38, &y64, shift);

      const __m256i m16B =

          calc_mask_d16_inv_avx2(&s0B, &s1B, &_r, &y38, &y64, shift);

      const __m256i m16C =

          calc_mask_d16_inv_avx2(&s0C, &s1C, &_r, &y38, &y64, shift);

      const __m256i m16D =

          calc_mask_d16_inv_avx2(&s0D, &s1D, &_r, &y38, &y64, shift);

      const __m256i m16E =

          calc_mask_d16_inv_avx2(&s0E, &s1E, &_r, &y38, &y64, shift);

      const __m256i m16F =

          calc_mask_d16_inv_avx2(&s0F, &s1F, &_r, &y38, &y64, shift);

      const __m256i m16G =

          calc_mask_d16_inv_avx2(&s0G, &s1G, &_r, &y38, &y64, shift);

      const __m256i m16H =

          calc_mask_d16_inv_avx2(&s0H, &s1H, &_r, &y38, &y64, shift);

      const __m256i m8AB = _mm256_packus_epi16(m16A, m16B);

      const __m256i m8CD = _mm256_packus_epi16(m16C, m16D);

      const __m256i m8EF = _mm256_packus_epi16(m16E, m16F);

      const __m256i m8GH = _mm256_packus_epi16(m16G, m16H);

      yy_storeu_256(mask, _mm256_permute4x64_epi64(m8AB, 0xd8));

      yy_storeu_256(mask + 32, _mm256_permute4x64_epi64(m8CD, 0xd8));

      yy_storeu_256(mask + 64, _mm256_permute4x64_epi64(m8EF, 0xd8));

      yy_storeu_256(mask + 96, _mm256_permute4x64_epi64(m8GH, 0xd8));

      src0 += src0_stride;

      src1 += src1_stride;

      mask += 128;

      i += 1;

    } while (i < h);

  }

}

void av1_build_compound_diffwtd_mask_d16_avx2(

    uint8_t *mask, DIFFWTD_MASK_TYPE mask_type, const CONV_BUF_TYPE *src0,

    int src0_stride, const CONV_BUF_TYPE *src1, int src1_stride, int h, int w,

    ConvolveParams *conv_params, int bd) {

  const int shift =

      2 * FILTER_BITS - conv_params->round_0 - conv_params->round_1 + (bd - 8);

  // When rounding constant is added, there is a possibility of overflow.

  // However that much precision is not required. Code should very well work for

  // other values of DIFF_FACTOR_LOG2 and AOM_BLEND_A64_MAX_ALPHA as well. But

  // there is a possibility of corner case bugs.

  assert(DIFF_FACTOR_LOG2 == 4);

  assert(AOM_BLEND_A64_MAX_ALPHA == 64);

  if (mask_type == DIFFWTD_38) {

    build_compound_diffwtd_mask_d16_avx2(mask, src0, src0_stride, src1,

                                         src1_stride, h, w, shift);

  } else {

    build_compound_diffwtd_mask_d16_inv_avx2(mask, src0, src0_stride, src1,

                                             src1_stride, h, w, shift);

  }

}

#if CONFIG_AV1_HIGHBITDEPTH

void av1_build_compound_diffwtd_mask_highbd_avx2(

    uint8_t *mask, DIFFWTD_MASK_TYPE mask_type, const uint8_t *src0,

    int src0_stride, const uint8_t *src1, int src1_stride, int h, int w,

    int bd) {

  if (w < 16) {

    av1_build_compound_diffwtd_mask_highbd_ssse3(

        mask, mask_type, src0, src0_stride, src1, src1_stride, h, w, bd);

  } else {

    assert(mask_type == DIFFWTD_38 || mask_type == DIFFWTD_38_INV);

    assert(bd >= 8);

    assert((w % 16) == 0);

    const __m256i y0 = _mm256_setzero_si256();

    const __m256i yAOM_BLEND_A64_MAX_ALPHA =

        _mm256_set1_epi16(AOM_BLEND_A64_MAX_ALPHA);

    const int mask_base = 38;

    const __m256i ymask_base = _mm256_set1_epi16(mask_base);

    const uint16_t *ssrc0 = CONVERT_TO_SHORTPTR(src0);

    const uint16_t *ssrc1 = CONVERT_TO_SHORTPTR(src1);

    if (bd == 8) {

      if (mask_type == DIFFWTD_38_INV) {

        for (int i = 0; i < h; ++i) {

          for (int j = 0; j < w; j += 16) {

            __m256i s0 = _mm256_loadu_si256((const __m256i *)&ssrc0[j]);

            __m256i s1 = _mm256_loadu_si256((const __m256i *)&ssrc1[j]);

            __m256i diff = _mm256_srai_epi16(

                _mm256_abs_epi16(_mm256_sub_epi16(s0, s1)), DIFF_FACTOR_LOG2);

            __m256i m = _mm256_min_epi16(

                _mm256_max_epi16(y0, _mm256_add_epi16(diff, ymask_base)),

                yAOM_BLEND_A64_MAX_ALPHA);

            m = _mm256_sub_epi16(yAOM_BLEND_A64_MAX_ALPHA, m);

            m = _mm256_packus_epi16(m, m);

            m = _mm256_permute4x64_epi64(m, _MM_SHUFFLE(0, 0, 2, 0));

            __m128i m0 = _mm256_castsi256_si128(m);

            _mm_storeu_si128((__m128i *)&mask[j], m0);

          }

          ssrc0 += src0_stride;

          ssrc1 += src1_stride;

          mask += w;

        }

      } else {

        for (int i = 0; i < h; ++i) {

          for (int j = 0; j < w; j += 16) {

            __m256i s0 = _mm256_loadu_si256((const __m256i *)&ssrc0[j]);

            __m256i s1 = _mm256_loadu_si256((const __m256i *)&ssrc1[j]);

            __m256i diff = _mm256_srai_epi16(

                _mm256_abs_epi16(_mm256_sub_epi16(s0, s1)), DIFF_FACTOR_LOG2);

            __m256i m = _mm256_min_epi16(

                _mm256_max_epi16(y0, _mm256_add_epi16(diff, ymask_base)),

                yAOM_BLEND_A64_MAX_ALPHA);

            m = _mm256_packus_epi16(m, m);

            m = _mm256_permute4x64_epi64(m, _MM_SHUFFLE(0, 0, 2, 0));

            __m128i m0 = _mm256_castsi256_si128(m);

            _mm_storeu_si128((__m128i *)&mask[j], m0);

          }

          ssrc0 += src0_stride;

          ssrc1 += src1_stride;

          mask += w;

        }

      }

    } else {

      const __m128i xshift = xx_set1_64_from_32i(bd - 8 + DIFF_FACTOR_LOG2);

      if (mask_type == DIFFWTD_38_INV) {

        for (int i = 0; i < h; ++i) {

          for (int j = 0; j < w; j += 16) {

            __m256i s0 = _mm256_loadu_si256((const __m256i *)&ssrc0[j]);

            __m256i s1 = _mm256_loadu_si256((const __m256i *)&ssrc1[j]);

            __m256i diff = _mm256_sra_epi16(

                _mm256_abs_epi16(_mm256_sub_epi16(s0, s1)), xshift);

            __m256i m = _mm256_min_epi16(

                _mm256_max_epi16(y0, _mm256_add_epi16(diff, ymask_base)),

                yAOM_BLEND_A64_MAX_ALPHA);

            m = _mm256_sub_epi16(yAOM_BLEND_A64_MAX_ALPHA, m);

            m = _mm256_packus_epi16(m, m);

            m = _mm256_permute4x64_epi64(m, _MM_SHUFFLE(0, 0, 2, 0));

            __m128i m0 = _mm256_castsi256_si128(m);

            _mm_storeu_si128((__m128i *)&mask[j], m0);

          }

          ssrc0 += src0_stride;

          ssrc1 += src1_stride;

          mask += w;

        }

      } else {

        for (int i = 0; i < h; ++i) {

          for (int j = 0; j < w; j += 16) {

            __m256i s0 = _mm256_loadu_si256((const __m256i *)&ssrc0[j]);

            __m256i s1 = _mm256_loadu_si256((const __m256i *)&ssrc1[j]);

            __m256i diff = _mm256_sra_epi16(

                _mm256_abs_epi16(_mm256_sub_epi16(s0, s1)), xshift);

            __m256i m = _mm256_min_epi16(

                _mm256_max_epi16(y0, _mm256_add_epi16(diff, ymask_base)),

                yAOM_BLEND_A64_MAX_ALPHA);

            m = _mm256_packus_epi16(m, m);

            m = _mm256_permute4x64_epi64(m, _MM_SHUFFLE(0, 0, 2, 0));

            __m128i m0 = _mm256_castsi256_si128(m);

            _mm_storeu_si128((__m128i *)&mask[j], m0);

          }

          ssrc0 += src0_stride;

          ssrc1 += src1_stride;

          mask += w;

        }

      }

    }

  }

}

#endif  // CONFIG_AV1_HIGHBITDEPTH