/*

 * Copyright (c) 2021, Alliance for Open Media. All rights reserved

 *

 * This source code is subject to the terms of the BSD 3-Clause Clear License

 * and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear

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

 * can obtain it at aomedia.org/license/software-license/bsd-3-c-c/.  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

 * aomedia.org/license/patent-license/.

 */

#include <immintrin.h>

#include "config/av2_rtcd.h"

#include "avm/avm_integer.h"

#include "avm_dsp/blend.h"

#include "avm_dsp/x86/synonyms.h"

#include "avm_dsp/x86/synonyms_avx2.h"

#include "av2/common/blockd.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(AVM_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 if (w == 128) {

    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);

  } else {

    assert(w == 256);

    do {

      const CONV_BUF_TYPE *src0_ptr = src0;

      const CONV_BUF_TYPE *src1_ptr = src1;

      for (int loop = 0; loop < 2; loop++) {

        const __m256i s0A = yy_loadu_256(src0_ptr);

        const __m256i s0B = yy_loadu_256(src0_ptr + 16);

        const __m256i s0C = yy_loadu_256(src0_ptr + 32);

        const __m256i s0D = yy_loadu_256(src0_ptr + 48);

        const __m256i s0E = yy_loadu_256(src0_ptr + 64);

        const __m256i s0F = yy_loadu_256(src0_ptr + 80);

        const __m256i s0G = yy_loadu_256(src0_ptr + 96);

        const __m256i s0H = yy_loadu_256(src0_ptr + 112);

        const __m256i s1A = yy_loadu_256(src1_ptr);

        const __m256i s1B = yy_loadu_256(src1_ptr + 16);

        const __m256i s1C = yy_loadu_256(src1_ptr + 32);

        const __m256i s1D = yy_loadu_256(src1_ptr + 48);

        const __m256i s1E = yy_loadu_256(src1_ptr + 64);

        const __m256i s1F = yy_loadu_256(src1_ptr + 80);

        const __m256i s1G = yy_loadu_256(src1_ptr + 96);

        const __m256i s1H = yy_loadu_256(src1_ptr + 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_ptr += 128;

        src1_ptr += 128;

        mask += 128;

      }

      src0 += src0_stride;

      src1 += src1_stride;

      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(AVM_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 if (w == 128) {

    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);

  } else {

    assert(w == 256);

    do {

      const CONV_BUF_TYPE *src0_ptr = src0;

      const CONV_BUF_TYPE *src1_ptr = src1;

      for (int loop = 0; loop < 2; loop++) {

        const __m256i s0A = yy_loadu_256(src0_ptr);

        const __m256i s0B = yy_loadu_256(src0_ptr + 16);

        const __m256i s0C = yy_loadu_256(src0_ptr + 32);

        const __m256i s0D = yy_loadu_256(src0_ptr + 48);

        const __m256i s0E = yy_loadu_256(src0_ptr + 64);

        const __m256i s0F = yy_loadu_256(src0_ptr + 80);

        const __m256i s0G = yy_loadu_256(src0_ptr + 96);

        const __m256i s0H = yy_loadu_256(src0_ptr + 112);

        const __m256i s1A = yy_loadu_256(src1_ptr);

        const __m256i s1B = yy_loadu_256(src1_ptr + 16);

        const __m256i s1C = yy_loadu_256(src1_ptr + 32);

        const __m256i s1D = yy_loadu_256(src1_ptr + 48);

        const __m256i s1E = yy_loadu_256(src1_ptr + 64);

        const __m256i s1F = yy_loadu_256(src1_ptr + 80);

        const __m256i s1G = yy_loadu_256(src1_ptr + 96);

        const __m256i s1H = yy_loadu_256(src1_ptr + 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_ptr += 128;

        src1_ptr += 128;

        mask += 128;

      }

      src0 += src0_stride;

      src1 += src1_stride;

      i += 1;

    } while (i < h);

  }

}

void av2_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 AVM_BLEND_A64_MAX_ALPHA as well. But

  // there is a possibility of corner case bugs.

  assert(DIFF_FACTOR_LOG2 == 4);

  assert(AVM_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);

  }

}

void av2_build_compound_diffwtd_mask_highbd_avx2(

    uint8_t *mask, DIFFWTD_MASK_TYPE mask_type, const uint16_t *ssrc0,

    int src0_stride, const uint16_t *ssrc1, int src1_stride, int h, int w,

    int bd) {

  if (w < 16) {

    av2_build_compound_diffwtd_mask_highbd_ssse3(

        mask, mask_type, ssrc0, src0_stride, ssrc1, 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 yAVM_BLEND_A64_MAX_ALPHA =

        _mm256_set1_epi16(AVM_BLEND_A64_MAX_ALPHA);

    const int mask_base = 38;

    const __m256i ymask_base = _mm256_set1_epi16(mask_base);

    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)),

                yAVM_BLEND_A64_MAX_ALPHA);

            m = _mm256_sub_epi16(yAVM_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)),

                yAVM_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)),

                yAVM_BLEND_A64_MAX_ALPHA);

            m = _mm256_sub_epi16(yAVM_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)),

                yAVM_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;

        }

      }

    }

  }

}

static const uint8_t refinemv_pad_left[14][16] = {

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },

  { 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },

  { 2, 2, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },

  { 3, 3, 3, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },

  { 4, 4, 4, 4, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },

  { 5, 5, 5, 5, 5, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },

  { 6, 6, 6, 6, 6, 6, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },

  { 7, 7, 7, 7, 7, 7, 7, 7, 8, 9, 10, 11, 12, 13, 14, 15 },

  { 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 10, 11, 12, 13, 14, 15 },

  { 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 11, 12, 13, 14, 15 },

  { 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 12, 13, 14, 15 },

  { 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 12, 13, 14, 15 },

  { 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 13, 14, 15 },

  { 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 14, 15 },

};

static const uint8_t refinemv_pad_left_bw_greater_than_15[16][16] = {

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },

  { 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },

  { 2, 2, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },

  { 3, 3, 3, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },

  { 4, 4, 4, 4, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },

  { 5, 5, 5, 5, 5, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },

  { 6, 6, 6, 6, 6, 6, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },

  { 7, 7, 7, 7, 7, 7, 7, 7, 8, 9, 10, 11, 12, 13, 14, 15 },

  { 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 10, 11, 12, 13, 14, 15 },

  { 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 11, 12, 13, 14, 15 },

  { 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 12, 13, 14, 15 },

  { 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 12, 13, 14, 15 },

  { 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 13, 14, 15 },

  { 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 14, 15 },

  { 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 15 },

  { 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15 },

};

static const uint8_t refinemv_pad_right_arr[16][16] = {

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 14 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 13, 13 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 12, 12, 12 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 11, 11, 11, 11 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 10, 10, 10, 10 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 9, 9, 9, 9, 9, 9 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 8, 8, 8, 8, 8, 8, 8 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7 },

  { 0, 1, 2, 3, 4, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6 },

  { 0, 1, 2, 3, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5 },

  { 0, 1, 2, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4 },

  { 0, 1, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 },

  { 0, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 },

  { 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 },

  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },

};

static const uint8_t refinemv_pad_right_bw_31[15][16] = {

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 13, 15 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 12, 12, 15 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 11, 11, 11, 15 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 10, 10, 10, 15 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 9, 9, 9, 9, 9, 15 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 8, 8, 8, 8, 8, 8, 15 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 15 },

  { 0, 1, 2, 3, 4, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 15 },

  { 0, 1, 2, 3, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 15 },

  { 0, 1, 2, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 15 },

  { 0, 1, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 15 },

  { 0, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 15 },

  { 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 15 },

  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 15 },

};

static const uint8_t refinemv_pad_right_bw_23[8][16] = {

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },

  { 0, 1, 2, 3, 4, 5, 5, 5, 8, 9, 10, 11, 12, 13, 13, 14 },

  { 0, 1, 2, 3, 4, 4, 4, 4, 8, 9, 10, 11, 12, 12, 12, 13 },

  { 0, 1, 2, 3, 3, 3, 3, 3, 8, 9, 10, 11, 11, 11, 11, 12 },

  { 0, 1, 2, 2, 2, 2, 2, 2, 8, 9, 10, 10, 10, 10, 10, 11 },

  { 0, 1, 1, 1, 1, 1, 1, 1, 8, 9, 9, 9, 9, 9, 9, 9 },

  { 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8 },

  { 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8 },

};

static const uint8_t refinemv_pad_left_bw_23[8][16] = {

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },

  { 1, 1, 2, 3, 4, 5, 6, 5, 9, 9, 10, 11, 12, 13, 14, 14 },

  { 2, 2, 2, 3, 4, 5, 6, 4, 10, 10, 10, 11, 12, 13, 14, 15 },

  { 3, 3, 3, 3, 4, 5, 6, 3, 11, 11, 11, 11, 12, 13, 14, 15 },

  { 4, 4, 4, 4, 4, 5, 6, 2, 12, 12, 12, 12, 12, 13, 14, 15 },

  { 5, 5, 5, 5, 5, 5, 6, 1, 13, 13, 13, 13, 13, 13, 14, 15 },

  { 6, 6, 6, 6, 6, 6, 6, 0, 14, 14, 14, 14, 14, 14, 14, 15 },

  { 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 8, 8, 8, 8 },

};

static const uint8_t refinemv_pad_right_bw_15[14][16] = {

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 13, 15 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 12, 12, 15 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 11, 11, 11, 15 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 10, 10, 10, 15 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 9, 9, 9, 9, 9, 15 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 8, 8, 8, 8, 8, 8, 15 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 15 },

  { 0, 1, 2, 3, 4, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 15 },

  { 0, 1, 2, 3, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 15 },

  { 0, 1, 2, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 15 },

  { 0, 1, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 15 },

  { 0, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 15 },

  { 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 15 },

};

static const uint8_t refinemv_pad_right_bw_11[10][16] = {

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 9, 11, 12, 13, 14, 15 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 8, 8, 8, 11, 12, 13, 14, 15 },

  { 0, 1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 11, 12, 13, 14, 15 },

  { 0, 1, 2, 3, 4, 5, 6, 6, 6, 6, 6, 11, 12, 13, 14, 15 },

  { 0, 1, 2, 3, 4, 5, 5, 5, 5, 5, 5, 11, 12, 13, 14, 15 },

  { 0, 1, 2, 3, 4, 4, 4, 4, 4, 4, 4, 11, 12, 13, 14, 15 },

  { 0, 1, 2, 3, 3, 3, 3, 3, 3, 3, 3, 11, 12, 13, 14, 15 },

  { 0, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 11, 12, 13, 14, 15 },

  { 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 11, 12, 13, 14, 15 },

};

DECLARE_ALIGNED(32, static const uint8_t, pad_mc_border_shuffle_pattern[32]) = {

  0, 8, 1, 9, 2, 10, 3, 11, 4, 12, 5, 13, 6, 14, 7, 15,

  0, 8, 1, 9, 2, 10, 3, 11, 4, 12, 5, 13, 6, 14, 7, 15

};

DECLARE_ALIGNED(32, static const uint8_t, pad_mc_border_arrange_bytes[32]) = {

  0, 2, 4, 6, 8, 10, 12, 14, 1, 3, 5, 7, 9, 11, 13, 15,

  0, 2, 4, 6, 8, 10, 12, 14, 1, 3, 5, 7, 9, 11, 13, 15

};

// AVX2 implementation for refinemv_highbd_pad_mc_border_c for b_w = 15.

void refinemv_highbd_pad_mc_border_avx2(const uint16_t *src, int src_stride,

                                        uint16_t *dst, int dst_stride, int x0,

                                        int y0, int b_w, int b_h,

                                        const ReferenceArea *ref_area) {

  if (b_w != 15 && b_w != 11 && b_w != 23 && b_w != 31) {

    refinemv_highbd_pad_mc_border_c(src, src_stride, dst, dst_stride, x0, y0,

                                    b_w, b_h, ref_area);

    return;

  }

  assert(b_w == 15 || b_w == 11 || b_w == 23 || b_w == 31);

  const int ref_x0 = ref_area->pad_block.x0;

  const int ref_y0 = ref_area->pad_block.y0;

  const int ref_x1 = ref_area->pad_block.x1;

  const int ref_y1 = ref_area->pad_block.y1;

  // Get a pointer to the start of the real data for this row.

  const uint16_t *ref_row = src - x0 - y0 * src_stride;

  if (y0 >= ref_area->pad_block.y1)

    ref_row += (ref_area->pad_block.y1 - 1) * src_stride;

  else if (y0 >= ref_area->pad_block.y0)

    ref_row += y0 * src_stride;

  else

    ref_row += ref_area->pad_block.y0 * src_stride;

  int left = x0 < ref_x0 ? ref_x0 - x0 : 0;

  if (left > b_w) left = b_w;

  int right = (x0 + b_w > ref_x1) ? (x0 + b_w - ref_x1) : 0;

  if (right > b_w) right = b_w;

  if (b_w == 23) {

    if (left < (b_w - 1) && right < (b_w - 1) && (left != 0 || right != 0)) {

      const __m256i shuffle_input_reg =

          _mm256_load_si256((__m256i *)pad_mc_border_arrange_bytes);

      const __m256i shuffle_output_reg =

          _mm256_load_si256((__m256i *)pad_mc_border_shuffle_pattern);

      if (left < 16) {

        const __m128i shuffle_left = _mm_loadu_si128(

            (__m128i *)refinemv_pad_left_bw_greater_than_15[left]);

        const __m256i shuffle_reg_left = _mm256_inserti128_si256(

            _mm256_castsi128_si256(shuffle_left), shuffle_left, 1);

        if (right > 6) {

          const uint8_t *refinemv_pad_right = refinemv_pad_right_arr[right - 7];

          const __m128i shuffle_right =

              _mm_loadu_si128((__m128i *)refinemv_pad_right);

          const __m256i shuffle_reg_right = _mm256_inserti128_si256(

              _mm256_castsi128_si256(shuffle_right), shuffle_right, 1);

          __m256i out_reg_lo;

          __m128i out_reg_hi;

          do {

            // s0 s1 s2 s3 s4 s5 s6 s7 s8 s9 s10 s11 s12 s13 s14 s15

            const __m256i src_lo =

                _mm256_loadu_si256((__m256i *)(ref_row + x0));

            const __m256i src_01 =

                _mm256_shuffle_epi8(src_lo, shuffle_input_reg);

            __m256i src_reg = _mm256_permute4x64_epi64(src_01, 0xD8);

            src_reg = _mm256_shuffle_epi8(src_reg, shuffle_reg_left);

            src_reg = _mm256_shuffle_epi8(src_reg, shuffle_reg_right);

            out_reg_lo = _mm256_shuffle_epi8(

                _mm256_permute4x64_epi64(src_reg, 0xD8), shuffle_output_reg);

            out_reg_hi = _mm_set1_epi16(ref_row[b_w + x0 - right - 1]);

            do {

              _mm256_storeu_si256((__m256i *)dst, out_reg_lo);

              _mm_storeu_si128((__m128i *)(dst + 16), out_reg_hi);

              dst += dst_stride;

              ++y0;

              --b_h;

            } while ((y0 <= ref_y0 || y0 >= ref_y1) && b_h);

            ref_row += src_stride;

          } while (b_h);

        } else {

          const uint8_t *refinemv_pad_right = refinemv_pad_right_bw_23[right];

          const __m128i shuffle_right =

              _mm_loadu_si128((__m128i *)refinemv_pad_right);

          __m256i out_reg_lo;

          __m128i out_reg_hi;

          do {

            // s0 s1 s2 s3 s4 s5 s6 s7 s8 s9 s10 s11 s12 s13 s14 s15

            const __m256i src_lo =

                _mm256_loadu_si256((__m256i *)(ref_row + x0));

            // s17 s18 s19 s20 s21 s22 x x

            const __m128i src_hi =

                _mm_loadu_si128((__m128i *)(ref_row + x0 + 16));

            const __m256i src_01 =

                _mm256_shuffle_epi8(src_lo, shuffle_input_reg);

            __m128i src_01_hi = _mm_shuffle_epi8(

                src_hi, _mm256_castsi256_si128(shuffle_input_reg));

            __m256i src_reg = _mm256_permute4x64_epi64(src_01, 0xD8);

            src_reg = _mm256_shuffle_epi8(src_reg, shuffle_reg_left);

            src_01_hi = _mm_shuffle_epi8(src_01_hi, shuffle_right);

            out_reg_lo = _mm256_shuffle_epi8(

                _mm256_permute4x64_epi64(src_reg, 0xD8), shuffle_output_reg);

            out_reg_hi = _mm_shuffle_epi8(

                src_01_hi, _mm256_castsi256_si128(shuffle_output_reg));

            do {

              _mm256_storeu_si256((__m256i *)dst, out_reg_lo);

              _mm_storeu_si128((__m128i *)(dst + 16), out_reg_hi);

              dst += dst_stride;

              ++y0;

              --b_h;

            } while ((y0 <= ref_y0 || y0 >= ref_y1) && b_h);

            ref_row += src_stride;

          } while (b_h);

        }

      } else {

        if (right > 6) {

          const uint8_t *refinemv_pad_right = refinemv_pad_right_arr[right - 7];

          const __m128i shuffle_right =

              _mm_loadu_si128((__m128i *)refinemv_pad_right);

          const __m256i shuffle_reg_right = _mm256_inserti128_si256(

              _mm256_castsi128_si256(shuffle_right), shuffle_right, 1);

          __m256i out_reg_lo;

          __m128i out_reg_hi;

          do {

            // s0

            const __m256i src_lo = _mm256_set1_epi16(ref_row[x0 + left]);

            const __m256i src_01 =

                _mm256_shuffle_epi8(src_lo, shuffle_input_reg);

            __m256i src_reg = _mm256_permute4x64_epi64(src_01, 0xD8);

            src_reg = _mm256_shuffle_epi8(src_reg, shuffle_reg_right);

            out_reg_lo = _mm256_shuffle_epi8(

                _mm256_permute4x64_epi64(src_reg, 0xD8), shuffle_output_reg);

            out_reg_hi = _mm_set1_epi16(ref_row[b_w + x0 - right - 1]);

            do {

              _mm256_storeu_si256((__m256i *)dst, out_reg_lo);

              _mm_storeu_si128((__m128i *)(dst + 16), out_reg_hi);

              dst += dst_stride;

              ++y0;

              --b_h;

            } while ((y0 <= ref_y0 || y0 >= ref_y1) && b_h);

            ref_row += src_stride;

          } while (b_h);

        } else {

          const uint8_t *refinemv_pad_right = refinemv_pad_right_bw_23[right];

          const __m128i shuffle_right =

              _mm_loadu_si128((__m128i *)refinemv_pad_right);