text: /*
   * Copyright (c) 2017, 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/aom_dsp_rtcd.h"
  #include "aom_dsp/x86/lpf_common_sse2.h"
  
  static INLINE __m256i dc_sum_64(const uint8_t *ref) {
    const __m256i x0 = _mm256_loadu_si256((const __m256i *)ref);
    const __m256i x1 = _mm256_loadu_si256((const __m256i *)(ref + 32));
    const __m256i zero = _mm256_setzero_si256();
    __m256i y0 = _mm256_sad_epu8(x0, zero);
    __m256i y1 = _mm256_sad_epu8(x1, zero);
    y0 = _mm256_add_epi64(y0, y1);
    __m256i u0 = _mm256_permute2x128_si256(y0, y0, 1);
    y0 = _mm256_add_epi64(u0, y0);
    u0 = _mm256_unpackhi_epi64(y0, y0);
    return _mm256_add_epi16(y0, u0);
  }
  
  static INLINE __m256i dc_sum_32(const uint8_t *ref) {
    const __m256i x = _mm256_loadu_si256((const __m256i *)ref);
    const __m256i zero = _mm256_setzero_si256();
    __m256i y = _mm256_sad_epu8(x, zero);
    __m256i u = _mm256_permute2x128_si256(y, y, 1);
    y = _mm256_add_epi64(u, y);
    u = _mm256_unpackhi_epi64(y, y);
    return _mm256_add_epi16(y, u);
  }
  
  static INLINE void row_store_32xh(const __m256i *r, int height, uint8_t *dst,
                                    ptrdiff_t stride) {
    for (int i = 0; i < height; ++i) {
      _mm256_storeu_si256((__m256i *)dst, *r);
      dst += stride;
    }
  }
  
  static INLINE void row_store_32x2xh(const __m256i *r0, const __m256i *r1,
                                      int height, uint8_t *dst,
                                      ptrdiff_t stride) {
    for (int i = 0; i < height; ++i) {
      _mm256_storeu_si256((__m256i *)dst, *r0);
      _mm256_storeu_si256((__m256i *)(dst + 32), *r1);
      dst += stride;
    }
  }
  
  static INLINE void row_store_64xh(const __m256i *r, int height, uint8_t *dst,
                                    ptrdiff_t stride) {
    for (int i = 0; i < height; ++i) {
      _mm256_storeu_si256((__m256i *)dst, *r);
      _mm256_storeu_si256((__m256i *)(dst + 32), *r);
      dst += stride;
    }
  }
  
  static DECLARE_ALIGNED(16, uint8_t, HighbdLoadMaskx[8][16]) = {
    { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
    { 0, 1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 },
    { 0, 1, 0, 1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 },
    { 0, 1, 0, 1, 0, 1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
    { 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 2, 3, 4, 5, 6, 7 },
    { 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 2, 3, 4, 5 },
    { 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 2, 3 },
    { 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1 },
  };
  
  static DECLARE_ALIGNED(16, uint8_t, HighbdEvenOddMaskx4[4][16]) = {
    { 0, 1, 4, 5, 8, 9, 12, 13, 2, 3, 6, 7, 10, 11, 14, 15 },
    { 0, 1, 2, 3, 6, 7, 10, 11, 14, 15, 4, 5, 8, 9, 12, 13 },
    { 0, 1, 0, 1, 4, 5, 8, 9, 12, 13, 0, 1, 6, 7, 10, 11 },
    { 0, 1, 0, 1, 0, 1, 6, 7, 10, 11, 14, 15, 0, 1, 8, 9 }
  };
  
  static DECLARE_ALIGNED(16, uint8_t, HighbdEvenOddMaskx[8][32]) = {
    { 0, 1, 4, 5, 8,  9,  12, 13, 16, 17, 20, 21, 24, 25, 28, 29,
      2, 3, 6, 7, 10, 11, 14, 15, 18, 19, 22, 23, 26, 27, 30, 31 },
    { 0, 1, 2, 3, 6, 7, 10, 11, 14, 15, 18, 19, 22, 23, 26, 27,
      0, 1, 4, 5, 8, 9, 12, 13, 16, 17, 20, 21, 24, 25, 28, 29 },
    { 0, 1, 0, 1, 4, 5, 8,  9,  12, 13, 16, 17, 20, 21, 24, 25,
      0, 1, 0, 1, 6, 7, 10, 11, 14, 15, 18, 19, 22, 23, 26, 27 },
    { 0, 1, 0, 1, 0, 1, 6, 7, 10, 11, 14, 15, 18, 19, 22, 23,
      0, 1, 0, 1, 0, 1, 8, 9, 12, 13, 16, 17, 20, 21, 24, 25 },
    { 0, 1, 0, 1, 0, 1, 0, 1, 8,  9,  12, 13, 16, 17, 20, 21,
      0, 1, 0, 1, 0, 1, 0, 1, 10, 11, 14, 15, 18, 19, 22, 23 },
    { 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 10, 11, 14, 15, 18, 19,
      0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 12, 13, 16, 17, 20, 21 },
    { 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 12, 13, 16, 17,
      0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 14, 15, 18, 19 },
    { 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 14, 15,
      0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 16, 17 }
  };
  
  static DECLARE_ALIGNED(32, uint16_t, HighbdBaseMask[17][16]) = {
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
    { 0xffff, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
    { 0xffff, 0xffff, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
    { 0xffff, 0xffff, 0xffff, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
    { 0xffff, 0xffff, 0xffff, 0xffff, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
    { 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
    { 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0 },
    { 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0, 0, 0, 0, 0, 0, 0,
      0, 0 },
    { 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0, 0, 0, 0,
      0, 0, 0, 0 },
    { 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0,
      0, 0, 0, 0, 0, 0 },
    { 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
      0xffff, 0, 0, 0, 0, 0, 0 },
    { 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
      0xffff, 0xffff, 0, 0, 0, 0, 0 },
    { 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
      0xffff, 0xffff, 0xffff, 0, 0, 0, 0 },
    { 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
      0xffff, 0xffff, 0xffff, 0xffff, 0, 0, 0 },
    { 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
      0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0, 0 },
    { 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
      0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0 },
    { 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
      0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff }
  };
  
  static INLINE void highbd_transpose16x4_8x8_sse2(__m128i *x, __m128i *d) {
    __m128i r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, r14, r15;
  
    r0 = _mm_unpacklo_epi16(x[0], x[1]);
    r1 = _mm_unpacklo_epi16(x[2], x[3]);
    r2 = _mm_unpacklo_epi16(x[4], x[5]);
    r3 = _mm_unpacklo_epi16(x[6], x[7]);
  
    r4 = _mm_unpacklo_epi16(x[8], x[9]);
    r5 = _mm_unpacklo_epi16(x[10], x[11]);
    r6 = _mm_unpacklo_epi16(x[12], x[13]);
    r7 = _mm_unpacklo_epi16(x[14], x[15]);
  
    r8 = _mm_unpacklo_epi32(r0, r1);
    r9 = _mm_unpackhi_epi32(r0, r1);
    r10 = _mm_unpacklo_epi32(r2, r3);
    r11 = _mm_unpackhi_epi32(r2, r3);
  
    r12 = _mm_unpacklo_epi32(r4, r5);
    r13 = _mm_unpackhi_epi32(r4, r5);
    r14 = _mm_unpacklo_epi32(r6, r7);
    r15 = _mm_unpackhi_epi32(r6, r7);
  
    r0 = _mm_unpacklo_epi64(r8, r9);
    r1 = _mm_unpackhi_epi64(r8, r9);
    r2 = _mm_unpacklo_epi64(r10, r11);
    r3 = _mm_unpackhi_epi64(r10, r11);
  
    r4 = _mm_unpacklo_epi64(r12, r13);
    r5 = _mm_unpackhi_epi64(r12, r13);
    r6 = _mm_unpacklo_epi64(r14, r15);
    r7 = _mm_unpackhi_epi64(r14, r15);
  
    d[0] = _mm_unpacklo_epi64(r0, r2);
    d[1] = _mm_unpacklo_epi64(r4, r6);
    d[2] = _mm_unpacklo_epi64(r1, r3);
    d[3] = _mm_unpacklo_epi64(r5, r7);
  
    d[4] = _mm_unpackhi_epi64(r0, r2);
    d[5] = _mm_unpackhi_epi64(r4, r6);
    d[6] = _mm_unpackhi_epi64(r1, r3);
    d[7] = _mm_unpackhi_epi64(r5, r7);
  }
  
  static INLINE void highbd_transpose4x16_avx2(__m256i *x, __m256i *d) {
    __m256i w0, w1, w2, w3, ww0, ww1;
  
    w0 = _mm256_unpacklo_epi16(x[0], x[1]);  // 00 10 01 11 02 12 03 13
    w1 = _mm256_unpacklo_epi16(x[2], x[3]);  // 20 30 21 31 22 32 23 33
    w2 = _mm256_unpackhi_epi16(x[0], x[1]);  // 40 50 41 51 42 52 43 53
    w3 = _mm256_unpackhi_epi16(x[2], x[3]);  // 60 70 61 71 62 72 63 73
  
    ww0 = _mm256_unpacklo_epi32(w0, w1);  // 00 10 20 30 01 11 21 31
    ww1 = _mm256_unpacklo_epi32(w2, w3);  // 40 50 60 70 41 51 61 71
  
    d[0] = _mm256_unpacklo_epi64(ww0, ww1);  // 00 10 20 30 40 50 60 70
    d[1] = _mm256_unpackhi_epi64(ww0, ww1);  // 01 11 21 31 41 51 61 71
  
    ww0 = _mm256_unpackhi_epi32(w0, w1);  // 02 12 22 32 03 13 23 33
    ww1 = _mm256_unpackhi_epi32(w2, w3);  // 42 52 62 72 43 53 63 73
  
    d[2] = _mm256_unpacklo_epi64(ww0, ww1);  // 02 12 22 32 42 52 62 72
    d[3] = _mm256_unpackhi_epi64(ww0, ww1);  // 03 13 23 33 43 53 63 73
  }
  
  static INLINE void highbd_transpose8x16_16x8_avx2(__m256i *x, __m256i *d) {
    __m256i w0, w1, w2, w3, ww0, ww1;
  
    w0 = _mm256_unpacklo_epi16(x[0], x[1]);  // 00 10 01 11 02 12 03 13
    w1 = _mm256_unpacklo_epi16(x[2], x[3]);  // 20 30 21 31 22 32 23 33
    w2 = _mm256_unpacklo_epi16(x[4], x[5]);  // 40 50 41 51 42 52 43 53
    w3 = _mm256_unpacklo_epi16(x[6], x[7]);  // 60 70 61 71 62 72 63 73
  
    ww0 = _mm256_unpacklo_epi32(w0, w1);  // 00 10 20 30 01 11 21 31
    ww1 = _mm256_unpacklo_epi32(w2, w3);  // 40 50 60 70 41 51 61 71
  
    d[0] = _mm256_unpacklo_epi64(ww0, ww1);  // 00 10 20 30 40 50 60 70
    d[1] = _mm256_unpackhi_epi64(ww0, ww1);  // 01 11 21 31 41 51 61 71
  
    ww0 = _mm256_unpackhi_epi32(w0, w1);  // 02 12 22 32 03 13 23 33
    ww1 = _mm256_unpackhi_epi32(w2, w3);  // 42 52 62 72 43 53 63 73
  
    d[2] = _mm256_unpacklo_epi64(ww0, ww1);  // 02 12 22 32 42 52 62 72
    d[3] = _mm256_unpackhi_epi64(ww0, ww1);  // 03 13 23 33 43 53 63 73
  
    w0 = _mm256_unpackhi_epi16(x[0], x[1]);  // 04 14 05 15 06 16 07 17
    w1 = _mm256_unpackhi_epi16(x[2], x[3]);  // 24 34 25 35 26 36 27 37
    w2 = _mm256_unpackhi_epi16(x[4], x[5]);  // 44 54 45 55 46 56 47 57
    w3 = _mm256_unpackhi_epi16(x[6], x[7]);  // 64 74 65 75 66 76 67 77
  
    ww0 = _mm256_unpacklo_epi32(w0, w1);  // 04 14 24 34 05 15 25 35
    ww1 = _mm256_unpacklo_epi32(w2, w3);  // 44 54 64 74 45 55 65 75
  
    d[4] = _mm256_unpacklo_epi64(ww0, ww1);  // 04 14 24 34 44 54 64 74
    d[5] = _mm256_unpackhi_epi64(ww0, ww1);  // 05 15 25 35 45 55 65 75
  
    ww0 = _mm256_unpackhi_epi32(w0, w1);  // 06 16 26 36 07 17 27 37
    ww1 = _mm256_unpackhi_epi32(w2, w3);  // 46 56 66 76 47 57 67 77
  
    d[6] = _mm256_unpacklo_epi64(ww0, ww1);  // 06 16 26 36 46 56 66 76
    d[7] = _mm256_unpackhi_epi64(ww0, ww1);  // 07 17 27 37 47 57 67 77
  }
  
  static INLINE void highbd_transpose16x16_avx2(__m256i *x, __m256i *d) {
    __m256i w0, w1, w2, w3, ww0, ww1;
    __m256i dd[16];
    w0 = _mm256_unpacklo_epi16(x[0], x[1]);
    w1 = _mm256_unpacklo_epi16(x[2], x[3]);
    w2 = _mm256_unpacklo_epi16(x[4], x[5]);
    w3 = _mm256_unpacklo_epi16(x[6], x[7]);
  
    ww0 = _mm256_unpacklo_epi32(w0, w1);  //
    ww1 = _mm256_unpacklo_epi32(w2, w3);  //
  
    dd[0] = _mm256_unpacklo_epi64(ww0, ww1);
    dd[1] = _mm256_unpackhi_epi64(ww0, ww1);
  
    ww0 = _mm256_unpackhi_epi32(w0, w1);  //
    ww1 = _mm256_unpackhi_epi32(w2, w3);  //
  
    dd[2] = _mm256_unpacklo_epi64(ww0, ww1);
    dd[3] = _mm256_unpackhi_epi64(ww0, ww1);
  
    w0 = _mm256_unpackhi_epi16(x[0], x[1]);
    w1 = _mm256_unpackhi_epi16(x[2], x[3]);
    w2 = _mm256_unpackhi_epi16(x[4], x[5]);
    w3 = _mm256_unpackhi_epi16(x[6], x[7]);
  
    ww0 = _mm256_unpacklo_epi32(w0, w1);  //
    ww1 = _mm256_unpacklo_epi32(w2, w3);  //
  
    dd[4] = _mm256_unpacklo_epi64(ww0, ww1);
    dd[5] = _mm256_unpackhi_epi64(ww0, ww1);
  
    ww0 = _mm256_unpackhi_epi32(w0, w1);  //
    ww1 = _mm256_unpackhi_epi32(w2, w3);  //
  
    dd[6] = _mm256_unpacklo_epi64(ww0, ww1);
    dd[7] = _mm256_unpackhi_epi64(ww0, ww1);
  
    w0 = _mm256_unpacklo_epi16(x[8], x[9]);
    w1 = _mm256_unpacklo_epi16(x[10], x[11]);
    w2 = _mm256_unpacklo_epi16(x[12], x[13]);
    w3 = _mm256_unpacklo_epi16(x[14], x[15]);
  
    ww0 = _mm256_unpacklo_epi32(w0, w1);
    ww1 = _mm256_unpacklo_epi32(w2, w3);
  
    dd[8] = _mm256_unpacklo_epi64(ww0, ww1);
    dd[9] = _mm256_unpackhi_epi64(ww0, ww1);
  
    ww0 = _mm256_unpackhi_epi32(w0, w1);
    ww1 = _mm256_unpackhi_epi32(w2, w3);
  
    dd[10] = _mm256_unpacklo_epi64(ww0, ww1);
    dd[11] = _mm256_unpackhi_epi64(ww0, ww1);
  
    w0 = _mm256_unpackhi_epi16(x[8], x[9]);
    w1 = _mm256_unpackhi_epi16(x[10], x[11]);
    w2 = _mm256_unpackhi_epi16(x[12], x[13]);
    w3 = _mm256_unpackhi_epi16(x[14], x[15]);
  
    ww0 = _mm256_unpacklo_epi32(w0, w1);
    ww1 = _mm256_unpacklo_epi32(w2, w3);
  
    dd[12] = _mm256_unpacklo_epi64(ww0, ww1);
    dd[13] = _mm256_unpackhi_epi64(ww0, ww1);
  
    ww0 = _mm256_unpackhi_epi32(w0, w1);
    ww1 = _mm256_unpackhi_epi32(w2, w3);
  
    dd[14] = _mm256_unpacklo_epi64(ww0, ww1);
    dd[15] = _mm256_unpackhi_epi64(ww0, ww1);
  
    for (int i = 0; i < 8; i++) {
      d[i] = _mm256_insertf128_si256(dd[i], _mm256_castsi256_si128(dd[i + 8]), 1);
      d[i + 8] = _mm256_insertf128_si256(dd[i + 8],
                                         _mm256_extracti128_si256(dd[i], 1), 0);
    }
  }
  
  void aom_dc_predictor_32x32_avx2(uint8_t *dst, ptrdiff_t stride,
                                   const uint8_t *above, const uint8_t *left) {
    const __m256i sum_above = dc_sum_32(above);
    __m256i sum_left = dc_sum_32(left);
    sum_left = _mm256_add_epi16(sum_left, sum_above);
    const __m256i thirtytwo = _mm256_set1_epi16(32);
    sum_left = _mm256_add_epi16(sum_left, thirtytwo);
    sum_left = _mm256_srai_epi16(sum_left, 6);
    const __m256i zero = _mm256_setzero_si256();
    __m256i row = _mm256_shuffle_epi8(sum_left, zero);
    row_store_32xh(&row, 32, dst, stride);
  }
  
  void aom_dc_top_predictor_32x32_avx2(uint8_t *dst, ptrdiff_t stride,
                                       const uint8_t *above,
                                       const uint8_t *left) {
    __m256i sum = dc_sum_32(above);
    (void)left;
  
    const __m256i sixteen = _mm256_set1_epi16(16);
    sum = _mm256_add_epi16(sum, sixteen);
    sum = _mm256_srai_epi16(sum, 5);
    const __m256i zero = _mm256_setzero_si256();
    __m256i row = _mm256_shuffle_epi8(sum, zero);
    row_store_32xh(&row, 32, dst, stride);
  }
  
  void aom_dc_left_predictor_32x32_avx2(uint8_t *dst, ptrdiff_t stride,
                                        const uint8_t *above,
                                        const uint8_t *left) {
    __m256i sum = dc_sum_32(left);
    (void)above;
  
    const __m256i sixteen = _mm256_set1_epi16(16);
    sum = _mm256_add_epi16(sum, sixteen);
    sum = _mm256_srai_epi16(sum, 5);
    const __m256i zero = _mm256_setzero_si256();
    __m256i row = _mm256_shuffle_epi8(sum, zero);
    row_store_32xh(&row, 32, dst, stride);
  }
  
  void aom_dc_128_predictor_32x32_avx2(uint8_t *dst, ptrdiff_t stride,
                                       const uint8_t *above,
                                       const uint8_t *left) {
    (void)above;
    (void)left;
    const __m256i row = _mm256_set1_epi8((uint8_t)0x80);
    row_store_32xh(&row, 32, dst, stride);
  }
  
  void aom_v_predictor_32x32_avx2(uint8_t *dst, ptrdiff_t stride,
                                  const uint8_t *above, const uint8_t *left) {
    const __m256i row = _mm256_loadu_si256((const __m256i *)above);
    (void)left;
    row_store_32xh(&row, 32, dst, stride);
  }
  
  // There are 32 rows togeter. This function does line:
  // 0,1,2,3, and 16,17,18,19. The next call would do
  // 4,5,6,7, and 20,21,22,23. So 4 times of calling
  // would finish 32 rows.
  static INLINE void h_predictor_32x8line(const __m256i *row, uint8_t *dst,
                                          ptrdiff_t stride) {
    __m256i t[4];
    __m256i m = _mm256_setzero_si256();
    const __m256i inc = _mm256_set1_epi8(4);
    int i;
  
    for (i = 0; i < 4; i++) {
      t[i] = _mm256_shuffle_epi8(*row, m);
      __m256i r0 = _mm256_permute2x128_si256(t[i], t[i], 0);
      __m256i r1 = _mm256_permute2x128_si256(t[i], t[i], 0x11);
      _mm256_storeu_si256((__m256i *)dst, r0);
      _mm256_storeu_si256((__m256i *)(dst + (stride << 4)), r1);
      dst += stride;
      m = _mm256_add_epi8(m, inc);
    }
  }
  
  void aom_h_predictor_32x32_avx2(uint8_t *dst, ptrdiff_t stride,
                                  const uint8_t *above, const uint8_t *left) {
    (void)above;
    const __m256i left_col = _mm256_loadu_si256((__m256i const *)left);
  
    __m256i u = _mm256_unpacklo_epi8(left_col, left_col);
  
    __m256i v = _mm256_unpacklo_epi8(u, u);
    h_predictor_32x8line(&v, dst, stride);
    dst += stride << 2;
  
    v = _mm256_unpackhi_epi8(u, u);
    h_predictor_32x8line(&v, dst, stride);
    dst += stride << 2;
  
    u = _mm256_unpackhi_epi8(left_col, left_col);
  
    v = _mm256_unpacklo_epi8(u, u);
    h_predictor_32x8line(&v, dst, stride);
    dst += stride << 2;
  
    v = _mm256_unpackhi_epi8(u, u);
    h_predictor_32x8line(&v, dst, stride);
  }
  
  // -----------------------------------------------------------------------------
  // Rectangle
  
  // TODO(luoyi) The following two functions are shared with intrapred_sse2.c.
  // Use a header file, intrapred_common_x86.h
  static INLINE __m128i dc_sum_16_sse2(const uint8_t *ref) {
    __m128i x = _mm_load_si128((__m128i const *)ref);
    const __m128i zero = _mm_setzero_si128();
    x = _mm_sad_epu8(x, zero);
    const __m128i high = _mm_unpackhi_epi64(x, x);
    return _mm_add_epi16(x, high);
  }
  
  static INLINE __m128i dc_sum_32_sse2(const uint8_t *ref) {
    __m128i x0 = _mm_load_si128((__m128i const *)ref);
    __m128i x1 = _mm_load_si128((__m128i const *)(ref + 16));
    const __m128i zero = _mm_setzero_si128();
    x0 = _mm_sad_epu8(x0, zero);
    x1 = _mm_sad_epu8(x1, zero);
    x0 = _mm_add_epi16(x0, x1);
    const __m128i high = _mm_unpackhi_epi64(x0, x0);
    return _mm_add_epi16(x0, high);
  }
  
  void aom_dc_predictor_32x16_avx2(uint8_t *dst, ptrdiff_t stride,
                                   const uint8_t *above, const uint8_t *left) {
    const __m128i top_sum = dc_sum_32_sse2(above);
    __m128i left_sum = dc_sum_16_sse2(left);
    left_sum = _mm_add_epi16(top_sum, left_sum);
    uint16_t sum = _mm_cvtsi128_si32(left_sum);
    sum += 24;
    sum /= 48;
    const __m256i row = _mm256_set1_epi8((uint8_t)sum);
    row_store_32xh(&row, 16, dst, stride);
  }
  
  void aom_dc_predictor_32x64_avx2(uint8_t *dst, ptrdiff_t stride,
                                   const uint8_t *above, const uint8_t *left) {
    const __m256i sum_above = dc_sum_32(above);
    __m256i sum_left = dc_sum_64(left);
    sum_left = _mm256_add_epi16(sum_left, sum_above);
    uint16_t sum = _mm_cvtsi128_si32(_mm256_castsi256_si128(sum_left));
    sum += 48;
    sum /= 96;
    const __m256i row = _mm256_set1_epi8((uint8_t)sum);
    row_store_32xh(&row, 64, dst, stride);
  }
  
  void aom_dc_predictor_64x64_avx2(uint8_t *dst, ptrdiff_t stride,
                                   const uint8_t *above, const uint8_t *left) {
    const __m256i sum_above = dc_sum_64(above);
    __m256i sum_left = dc_sum_64(left);
    sum_left = _mm256_add_epi16(sum_left, sum_above);
    uint16_t sum = _mm_cvtsi128_si32(_mm256_castsi256_si128(sum_left));
    sum += 64;
    sum /= 128;
    const __m256i row = _mm256_set1_epi8((uint8_t)sum);
    row_store_64xh(&row, 64, dst, stride);
  }
  
  void aom_dc_predictor_64x32_avx2(uint8_t *dst, ptrdiff_t stride,
                                   const uint8_t *above, const uint8_t *left) {
    const __m256i sum_above = dc_sum_64(above);
    __m256i sum_left = dc_sum_32(left);
    sum_left = _mm256_add_epi16(sum_left, sum_above);
    uint16_t sum = _mm_cvtsi128_si32(_mm256_castsi256_si128(sum_left));
    sum += 48;
    sum /= 96;
    const __m256i row = _mm256_set1_epi8((uint8_t)sum);
    row_store_64xh(&row, 32, dst, stride);
  }
  
  void aom_dc_predictor_64x16_avx2(uint8_t *dst, ptrdiff_t stride,
                                   const uint8_t *above, const uint8_t *left) {
    const __m256i sum_above = dc_sum_64(above);
    __m256i sum_left = _mm256_castsi128_si256(dc_sum_16_sse2(left));
    sum_left = _mm256_add_epi16(sum_left, sum_above);
    uint16_t sum = _mm_cvtsi128_si32(_mm256_castsi256_si128(sum_left));
    sum += 40;
    sum /= 80;
    const __m256i row = _mm256_set1_epi8((uint8_t)sum);
    row_store_64xh(&row, 16, dst, stride);
  }
  
  void aom_dc_top_predictor_32x16_avx2(uint8_t *dst, ptrdiff_t stride,
                                       const uint8_t *above,
                                       const uint8_t *left) {
    __m256i sum = dc_sum_32(above);
    (void)left;
  
    const __m256i sixteen = _mm256_set1_epi16(16);
    sum = _mm256_add_epi16(sum, sixteen);
    sum = _mm256_srai_epi16(sum, 5);
    const __m256i zero = _mm256_setzero_si256();
    __m256i row = _mm256_shuffle_epi8(sum, zero);
    row_store_32xh(&row, 16, dst, stride);
  }
  
  void aom_dc_top_predictor_32x64_avx2(uint8_t *dst, ptrdiff_t stride,
                                       const uint8_t *above,
                                       const uint8_t *left) {
    __m256i sum = dc_sum_32(above);
    (void)left;
  
    const __m256i sixteen = _mm256_set1_epi16(16);
    sum = _mm256_add_epi16(sum, sixteen);
    sum = _mm256_srai_epi16(sum, 5);
    const __m256i zero = _mm256_setzero_si256();
    __m256i row = _mm256_shuffle_epi8(sum, zero);
    row_store_32xh(&row, 64, dst, stride);
  }
  
  void aom_dc_top_predictor_64x64_avx2(uint8_t *dst, ptrdiff_t stride,
                                       const uint8_t *above,
                                       const uint8_t *left) {
    __m256i sum = dc_sum_64(above);
    (void)left;
  
    const __m256i thirtytwo = _mm256_set1_epi16(32);
    sum = _mm256_add_epi16(sum, thirtytwo);
    sum = _mm256_srai_epi16(sum, 6);
    const __m256i zero = _mm256_setzero_si256();
    __m256i row = _mm256_shuffle_epi8(sum, zero);
    row_store_64xh(&row, 64, dst, stride);
  }
  
  void aom_dc_top_predictor_64x32_avx2(uint8_t *dst, ptrdiff_t stride,
                                       const uint8_t *above,
                                       const uint8_t *left) {
    __m256i sum = dc_sum_64(above);
    (void)left;
  
    const __m256i thirtytwo = _mm256_set1_epi16(32);
    sum = _mm256_add_epi16(sum, thirtytwo);
    sum = _mm256_srai_epi16(sum, 6);
    const __m256i zero = _mm256_setzero_si256();
    __m256i row = _mm256_shuffle_epi8(sum, zero);
    row_store_64xh(&row, 32, dst, stride);
  }
  
  void aom_dc_top_predictor_64x16_avx2(uint8_t *dst, ptrdiff_t stride,
                                       const uint8_t *above,
                                       const uint8_t *left) {
    __m256i sum = dc_sum_64(above);
    (void)left;
  
    const __m256i thirtytwo = _mm256_set1_epi16(32);
    sum = _mm256_add_epi16(sum, thirtytwo);
    sum = _mm256_srai_epi16(sum, 6);
    const __m256i zero = _mm256_setzero_si256();
    __m256i row = _mm256_shuffle_epi8(sum, zero);
    row_store_64xh(&row, 16, dst, stride);
  }
  
  void aom_dc_left_predictor_32x16_avx2(uint8_t *dst, ptrdiff_t stride,
                                        const uint8_t *above,
                                        const uint8_t *left) {
    __m128i sum = dc_sum_16_sse2(left);
    (void)above;
  
    const __m128i eight = _mm_set1_epi16(8);
    sum = _mm_add_epi16(sum, eight);
    sum = _mm_srai_epi16(sum, 4);
    const __m128i zero = _mm_setzero_si128();
    const __m128i r = _mm_shuffle_epi8(sum, zero);
    const __m256i row = _mm256_inserti128_si256(_mm256_castsi128_si256(r), r, 1);
    row_store_32xh(&row, 16, dst, stride);
  }
  
  void aom_dc_left_predictor_32x64_avx2(uint8_t *dst, ptrdiff_t stride,
                                        const uint8_t *above,
                                        const uint8_t *left) {
    __m256i sum = dc_sum_64(left);
    (void)above;
  
    const __m256i thirtytwo = _mm256_set1_epi16(32);
    sum = _mm256_add_epi16(sum, thirtytwo);
    sum = _mm256_srai_epi16(sum, 6);
    const __m256i zero = _mm256_setzero_si256();
    __m256i row = _mm256_shuffle_epi8(sum, zero);
    row_store_32xh(&row, 64, dst, stride);
  }
  
  void aom_dc_left_predictor_64x64_avx2(uint8_t *dst, ptrdiff_t stride,
                                        const uint8_t *above,
                                        const uint8_t *left) {
    __m256i sum = dc_sum_64(left);
    (void)above;
  
    const __m256i thirtytwo = _mm256_set1_epi16(32);
    sum = _mm256_add_epi16(sum, thirtytwo);
    sum = _mm256_srai_epi16(sum, 6);
    const __m256i zero = _mm256_setzero_si256();
    __m256i row = _mm256_shuffle_epi8(sum, zero);
    row_store_64xh(&row, 64, dst, stride);
  }
  
  void aom_dc_left_predictor_64x32_avx2(uint8_t *dst, ptrdiff_t stride,
                                        const uint8_t *above,
                                        const uint8_t *left) {
    __m256i sum = dc_sum_32(left);
    (void)above;
  
    const __m256i sixteen = _mm256_set1_epi16(16);
    sum = _mm256_add_epi16(sum, sixteen);
    sum = _mm256_srai_epi16(sum, 5);
    const __m256i zero = _mm256_setzero_si256();
    __m256i row = _mm256_shuffle_epi8(sum, zero);
    row_store_64xh(&row, 32, dst, stride);
  }
  
  void aom_dc_left_predictor_64x16_avx2(uint8_t *dst, ptrdiff_t stride,
                                        const uint8_t *above,
                                        const uint8_t *left) {
    __m128i sum = dc_sum_16_sse2(left);
    (void)above;
  
    const __m128i eight = _mm_set1_epi16(8);
    sum = _mm_add_epi16(sum, eight);
    sum = _mm_srai_epi16(sum, 4);
    const __m128i zero = _mm_setzero_si128();
    const __m128i r = _mm_shuffle_epi8(sum, zero);
    const __m256i row = _mm256_inserti128_si256(_mm256_castsi128_si256(r), r, 1);
    row_store_64xh(&row, 16, dst, stride);
  }
  
  void aom_dc_128_predictor_32x16_avx2(uint8_t *dst, ptrdiff_t stride,
                                       const uint8_t *above,
                                       const uint8_t *left) {
    (void)above;
    (void)left;
    const __m256i row = _mm256_set1_epi8((uint8_t)0x80);
    row_store_32xh(&row, 16, dst, stride);
  }
  
  void aom_dc_128_predictor_32x64_avx2(uint8_t *dst, ptrdiff_t stride,
                                       const uint8_t *above,
                                       const uint8_t *left) {
    (void)above;
    (void)left;
    const __m256i row = _mm256_set1_epi8((uint8_t)0x80);
    row_store_32xh(&row, 64, dst, stride);
  }
  
  void aom_dc_128_predictor_64x64_avx2(uint8_t *dst, ptrdiff_t stride,
                                       const uint8_t *above,
                                       const uint8_t *left) {
    (void)above;
    (void)left;
    const __m256i row = _mm256_set1_epi8((uint8_t)0x80);
    row_store_64xh(&row, 64, dst, stride);
  }
  
  void aom_dc_128_predictor_64x32_avx2(uint8_t *dst, ptrdiff_t stride,
                                       const uint8_t *above,
                                       const uint8_t *left) {
    (void)above;
    (void)left;
    const __m256i row = _mm256_set1_epi8((uint8_t)0x80);
    row_store_64xh(&row, 32, dst, stride);
  }
  
  void aom_dc_128_predictor_64x16_avx2(uint8_t *dst, ptrdiff_t stride,
                                       const uint8_t *above,
                                       const uint8_t *left) {
    (void)above;
    (void)left;
    const __m256i row = _mm256_set1_epi8((uint8_t)0x80);
    row_store_64xh(&row, 16, dst, stride);
  }
  
  void aom_v_predictor_32x16_avx2(uint8_t *dst, ptrdiff_t stride,
                                  const uint8_t *above, const uint8_t *left) {
    const __m256i row = _mm256_loadu_si256((const __m256i *)above);
    (void)left;
    row_store_32xh(&row, 16, dst, stride);
  }
  
  void aom_v_predictor_32x64_avx2(uint8_t *dst, ptrdiff_t stride,
                                  const uint8_t *above, const uint8_t *left) {
    const __m256i row = _mm256_loadu_si256((const __m256i *)above);
    (void)left;
    row_store_32xh(&row, 64, dst, stride);
  }
  
  void aom_v_predictor_64x64_avx2(uint8_t *dst, ptrdiff_t stride,
                                  const uint8_t *above, const uint8_t *left) {
    const __m256i row0 = _mm256_loadu_si256((const __m256i *)above);
    const __m256i row1 = _mm256_loadu_si256((const __m256i *)(above + 32));
    (void)left;
    row_store_32x2xh(&row0, &row1, 64, dst, stride);
  }
  
  void aom_v_predictor_64x32_avx2(uint8_t *dst, ptrdiff_t stride,
                                  const uint8_t *above, const uint8_t *left) {
    const __m256i row0 = _mm256_loadu_si256((const __m256i *)above);
    const __m256i row1 = _mm256_loadu_si256((const __m256i *)(above + 32));
    (void)left;
    row_store_32x2xh(&row0, &row1, 32, dst, stride);
  }
  
  void aom_v_predictor_64x16_avx2(uint8_t *dst, ptrdiff_t stride,
                                  const uint8_t *above, const uint8_t *left) {
    const __m256i row0 = _mm256_loadu_si256((const __m256i *)above);
    const __m256i row1 = _mm256_loadu_si256((const __m256i *)(above + 32));
    (void)left;
    row_store_32x2xh(&row0, &row1, 16, dst, stride);
  }
  
  // -----------------------------------------------------------------------------
  // PAETH_PRED
  
  // Return 16 16-bit pixels in one row (__m256i)
  static INLINE __m256i paeth_pred(const __m256i *left, const __m256i *top,
                                   const __m256i *topleft) {
    const __m256i base =
        _mm256_sub_epi16(_mm256_add_epi16(*top, *left), *topleft);
  
    __m256i pl = _mm256_abs_epi16(_mm256_sub_epi16(base, *left));
    __m256i pt = _mm256_abs_epi16(_mm256_sub_epi16(base, *top));
    __m256i ptl = _mm256_abs_epi16(_mm256_sub_epi16(base, *topleft));
  
    __m256i mask1 = _mm256_cmpgt_epi16(pl, pt);
    mask1 = _mm256_or_si256(mask1, _mm256_cmpgt_epi16(pl, ptl));
    __m256i mask2 = _mm256_cmpgt_epi16(pt, ptl);
  
    pl = _mm256_andnot_si256(mask1, *left);
  
    ptl = _mm256_and_si256(mask2, *topleft);
    pt = _mm256_andnot_si256(mask2, *top);
    pt = _mm256_or_si256(pt, ptl);
    pt = _mm256_and_si256(mask1, pt);
  
    return _mm256_or_si256(pt, pl);
  }
  
  // Return 16 8-bit pixels in one row (__m128i)
  static INLINE __m128i paeth_16x1_pred(const __m256i *left, const __m256i *top,
                                        const __m256i *topleft) {
    const __m256i p0 = paeth_pred(left, top, topleft);
    const __m256i p1 = _mm256_permute4x64_epi64(p0, 0xe);
    const __m256i p = _mm256_packus_epi16(p0, p1);
    return _mm256_castsi256_si128(p);
  }
  
  static INLINE __m256i get_top_vector(const uint8_t *above) {
    const __m128i x = _mm_load_si128((const __m128i *)above);
    const __m128i zero = _mm_setzero_si128();
    const __m128i t0 = _mm_unpacklo_epi8(x, zero);
    const __m128i t1 = _mm_unpackhi_epi8(x, zero);
    return _mm256_inserti128_si256(_mm256_castsi128_si256(t0), t1, 1);
  }
  
  void aom_paeth_predictor_16x8_avx2(uint8_t *dst, ptrdiff_t stride,
                                     const uint8_t *above, const uint8_t *left) {
    __m128i x = _mm_loadl_epi64((const __m128i *)left);
    const __m256i l = _mm256_inserti128_si256(_mm256_castsi128_si256(x), x, 1);
    const __m256i tl16 = _mm256_set1_epi16((uint16_t)above[-1]);
    __m256i rep = _mm256_set1_epi16((short)0x8000);
    const __m256i one = _mm256_set1_epi16(1);
    const __m256i top = get_top_vector(above);
  
    int i;
    for (i = 0; i < 8; ++i) {
      const __m256i l16 = _mm256_shuffle_epi8(l, rep);
      const __m128i row = paeth_16x1_pred(&l16, &top, &tl16);
  
      _mm_store_si128((__m128i *)dst, row);
      dst += stride;
      rep = _mm256_add_epi16(rep, one);
    }
  }
  
  static INLINE __m256i get_left_vector(const uint8_t *left) {
    const __m128i x = _mm_load_si128((const __m128i *)left);
    return _mm256_inserti128_si256(_mm256_castsi128_si256(x), x, 1);
  }
  
  void aom_paeth_predictor_16x16_avx2(uint8_t *dst, ptrdiff_t stride,
                                      const uint8_t *above, const uint8_t *left) {
    const __m256i l = get_left_vector(left);
    const __m256i tl16 = _mm256_set1_epi16((uint16_t)above[-1]);
    __m256i rep = _mm256_set1_epi16((short)0x8000);
    const __m256i one = _mm256_set1_epi16(1);
    const __m256i top = get_top_vector(above);
  
    int i;
    for (i = 0; i < 16; ++i) {
      const __m256i l16 = _mm256_shuffle_epi8(l, rep);
      const __m128i row = paeth_16x1_pred(&l16, &top, &tl16);
  
      _mm_store_si128((__m128i *)dst, row);
      dst += stride;
      rep = _mm256_add_epi16(rep, one);
    }
  }
  
  void aom_paeth_predictor_16x32_avx2(uint8_t *dst, ptrdiff_t stride,
                                      const uint8_t *above, const uint8_t *left) {
    __m256i l = get_left_vector(left);
    const __m256i tl16 = _mm256_set1_epi16((uint16_t)above[-1]);
    __m256i rep = _mm256_set1_epi16((short)0x8000);
    const __m256i one = _mm256_set1_epi16(1);
    const __m256i top = get_top_vector(above);
  
    int i;
    for (i = 0; i < 16; ++i) {
      const __m256i l16 = _mm256_shuffle_epi8(l, rep);
      const __m128i row = paeth_16x1_pred(&l16, &top, &tl16);
  
      _mm_store_si128((__m128i *)dst, row);
      dst += stride;
      rep = _mm256_add_epi16(rep, one);
    }
  
    l = get_left_vector(left + 16);
    rep = _mm256_set1_epi16((short)0x8000);
    for (i = 0; i < 16; ++i) {
      const __m256i l16 = _mm256_shuffle_epi8(l, rep);
      const __m128i row = paeth_16x1_pred(&l16, &top, &tl16);
  
      _mm_store_si128((__m128i *)dst, row);
      dst += stride;
      rep = _mm256_add_epi16(rep, one);
    }
  }
  
  void aom_paeth_predictor_16x64_avx2(uint8_t *dst, ptrdiff_t stride,
                                      const uint8_t *above, const uint8_t *left) {
    const __m256i tl16 = _mm256_set1_epi16((uint16_t)above[-1]);
    const __m256i one = _mm256_set1_epi16(1);
    const __m256i top = get_top_vector(above);
  
    for (int j = 0; j < 4; ++j) {
      const __m256i l = get_left_vector(left + j * 16);
      __m256i rep = _mm256_set1_epi16((short)0x8000);
      for (int i = 0; i < 16; ++i) {
        const __m256i l16 = _mm256_shuffle_epi8(l, rep);
        const __m128i row = paeth_16x1_pred(&l16, &top, &tl16);
  
        _mm_store_si128((__m128i *)dst, row);
        dst += stride;
        rep = _mm256_add_epi16(rep, one);
      }
    }
  }
  
  // Return 32 8-bit pixels in one row (__m256i)
  static INLINE __m256i paeth_32x1_pred(const __m256i *left, const __m256i *top0,
                                        const __m256i *top1,
                                        const __m256i *topleft) {
    __m256i p0 = paeth_pred(left, top0, topleft);
    __m256i p1 = _mm256_permute4x64_epi64(p0, 0xe);
    const __m256i x0 = _mm256_packus_epi16(p0, p1);
  
    p0 = paeth_pred(left, top1, topleft);
    p1 = _mm256_permute4x64_epi64(p0, 0xe);
    const __m256i x1 = _mm256_packus_epi16(p0, p1);
  
    return _mm256_permute2x128_si256(x0, x1, 0x20);
  }
  
  void aom_paeth_predictor_32x16_avx2(uint8_t *dst, ptrdiff_t stride,
                                      const uint8_t *above, const uint8_t *left) {
    const __m256i l = get_left_vector(left);
    const __m256i t0 = get_top_vector(above);
    const __m256i t1 = get_top_vector(above + 16);
    const __m256i tl = _mm256_set1_epi16((uint16_t)above[-1]);
    __m256i rep = _mm256_set1_epi16((short)0x8000);
    const __m256i one = _mm256_set1_epi16(1);
  
    int i;
    for (i = 0; i < 16; ++i) {
      const __m256i l16 = _mm256_shuffle_epi8(l, rep);
  
      const __m256i r = paeth_32x1_pred(&l16, &t0, &t1, &tl);
  
      _mm256_storeu_si256((__m256i *)dst, r);
  
      dst += stride;
      rep = _mm256_add_epi16(rep, one);
    }
  }
  
  void aom_paeth_predictor_32x32_avx2(uint8_t *dst, ptrdiff_t stride,
                                      const uint8_t *above, const uint8_t *left) {
    __m256i l = get_left_vector(left);
    const __m256i t0 = get_top_vector(above);
    const __m256i t1 = get_top_vector(above + 16);
    const __m256i tl = _mm256_set1_epi16((uint16_t)above[-1]);
    __m256i rep = _mm256_set1_epi16((short)0x8000);
    const __m256i one = _mm256_set1_epi16(1);
  
    int i;
    for (i = 0; i < 16; ++i) {
      const __m256i l16 = _mm256_shuffle_epi8(l, rep);
  
      const __m128i r0 = paeth_16x1_pred(&l16, &t0, &tl);
      const __m128i r1 = paeth_16x1_pred(&l16, &t1, &tl);
  
      _mm_store_si128((__m128i *)dst, r0);
      _mm_store_si128((__m128i *)(dst + 16), r1);
  
      dst += stride;
      rep = _mm256_add_epi16(rep, one);
    }
  
    l = get_left_vector(left + 16);
    rep = _mm256_set1_epi16((short)0x8000);
    for (i = 0; i < 16; ++i) {
      const __m256i l16 = _mm256_shuffle_epi8(l, rep);
  
      const __m128i r0 = paeth_16x1_pred(&l16, &t0, &tl);
      const __m128i r1 = paeth_16x1_pred(&l16, &t1, &tl);
  
      _mm_store_si128((__m128i *)dst, r0);
      _mm_store_si128((__m128i *)(dst + 16), r1);
  
      dst += stride;
      rep = _mm256_add_epi16(rep, one);
    }
  }
  
  void aom_paeth_predictor_32x64_avx2(uint8_t *dst, ptrdiff_t stride,
                                      const uint8_t *above, const uint8_t *left) {
    const __m256i t0 = get_top_vector(above);
    const __m256i t1 = get_top_vector(above + 16);
    const __m256i tl = _mm256_set1_epi16((uint16_t)above[-1]);
    const __m256i one = _mm256_set1_epi16(1);
  
    int i, j;
    for (j = 0; j < 4; ++j) {
      const __m256i l = get_left_vector(left + j * 16);
      __m256i rep = _mm256_set1_epi16((short)0x8000);
      for (i = 0; i < 16; ++i) {
        const __m256i l16 = _mm256_shuffle_epi8(l, rep);
  
        const __m128i r0 = paeth_16x1_pred(&l16, &t0, &tl);
        const __m128i r1 = paeth_16x1_pred(&l16, &t1, &tl);
  
        _mm_store_si128((__m128i *)dst, r0);
        _mm_store_si128((__m128i *)(dst + 16), r1);
  
        dst += stride;
        rep = _mm256_add_epi16(rep, one);
      }
    }
  }
  
  void aom_paeth_predictor_64x32_avx2(uint8_t *dst, ptrdiff_t stride,
                                      const uint8_t *above, const uint8_t *left) {
    const __m256i t0 = get_top_vector(above);
    const __m256i t1 = get_top_vector(above + 16);
    const __m256i t2 = get_top_vector(above + 32);
    const __m256i t3 = get_top_vector(above + 48);
    const __m256i tl = _mm256_set1_epi16((uint16_t)above[-1]);
    const __m256i one = _mm256_set1_epi16(1);
  
    int i, j;
    for (j = 0; j < 2; ++j) {
      const __m256i l = get_left_vector(left + j * 16);
      __m256i rep = _mm256_set1_epi16((short)0x8000);
      for (i = 0; i < 16; ++i) {
        const __m256i l16 = _mm256_shuffle_epi8(l, rep);
  
        const __m128i r0 = paeth_16x1_pred(&l16, &t0, &tl);
        const __m128i r1 = paeth_16x1_pred(&l16, &t1, &tl);
        const __m128i r2 = paeth_16x1_pred(&l16, &t2, &tl);
        const __m128i r3 = paeth_16x1_pred(&l16, &t3, &tl);
  
        _mm_store_si128((__m128i *)dst, r0);
        _mm_store_si128((__m128i *)(dst + 16), r1);
        _mm_store_si128((__m128i *)(dst + 32), r2);
        _mm_store_si128((__m128i *)(dst + 48), r3);
  
        dst += stride;
        rep = _mm256_add_epi16(rep, one);
      }
    }
  }
  
  void aom_paeth_predictor_64x64_avx2(uint8_t *dst, ptrdiff_t stride,
                                      const uint8_t *above, const uint8_t *left) {
    const __m256i t0 = get_top_vector(above);
    const __m256i t1 = get_top_vector(above + 16);
    const __m256i t2 = get_top_vector(above + 32);
    const __m256i t3 = get_top_vector(above + 48);
    const __m256i tl = _mm256_set1_epi16((uint16_t)above[-1]);
    const __m256i one = _mm256_set1_epi16(1);
  
    int i, j;
    for (j = 0; j < 4; ++j) {
      const __m256i l = get_left_vector(left + j * 16);
      __m256i rep = _mm256_set1_epi16((short)0x8000);
      for (i = 0; i < 16; ++i) {
        const __m256i l16 = _mm256_shuffle_epi8(l, rep);
  
        const __m128i r0 = paeth_16x1_pred(&l16, &t0, &tl);
        const __m128i r1 = paeth_16x1_pred(&l16, &t1, &tl);
        const __m128i r2 = paeth_16x1_pred(&l16, &t2, &tl);
        const __m128i r3 = paeth_16x1_pred(&l16, &t3, &tl);
  
        _mm_store_si128((__m128i *)dst, r0);
        _mm_store_si128((__m128i *)(dst + 16), r1);
        _mm_store_si128((__m128i *)(dst + 32), r2);
        _mm_store_si128((__m128i *)(dst + 48), r3);
  
        dst += stride;
        rep = _mm256_add_epi16(rep, one);
      }
    }
  }
  
  void aom_paeth_predictor_64x16_avx2(uint8_t *dst, ptrdiff_t stride,
                                      const uint8_t *above, const uint8_t *left) {
    const __m256i t0 = get_top_vector(above);
    const __m256i t1 = get_top_vector(above + 16);
    const __m256i t2 = get_top_vector(above + 32);
    const __m256i t3 = get_top_vector(above + 48);
    const __m256i tl = _mm256_set1_epi16((uint16_t)above[-1]);
    const __m256i one = _mm256_set1_epi16(1);
  
    int i;
    const __m256i l = get_left_vector(left);
    __m256i rep = _mm256_set1_epi16((short)0x8000);
    for (i = 0; i < 16; ++i) {
      const __m256i l16 = _mm256_shuffle_epi8(l, rep);
  
      const __m128i r0 = paeth_16x1_pred(&l16, &t0, &tl);
      const __m128i r1 = paeth_16x1_pred(&l16, &t1, &tl);
      const __m128i r2 = paeth_16x1_pred(&l16, &t2, &tl);
      const __m128i r3 = paeth_16x1_pred(&l16, &t3, &tl);
  
      _mm_store_si128((__m128i *)dst, r0);
      _mm_store_si128((__m128i *)(dst + 16), r1);
      _mm_store_si128((__m128i *)(dst + 32), r2);
      _mm_store_si128((__m128i *)(dst + 48), r3);
  
      dst += stride;
      rep = _mm256_add_epi16(rep, one);
    }
  }
  
  #define PERM4x64(c0, c1, c2, c3) c0 + (c1 << 2) + (c2 << 4) + (c3 << 6)
  #define PERM2x128(c0, c1) c0 + (c1 << 4)
  
  static AOM_FORCE_INLINE void highbd_dr_prediction_z1_4xN_internal_avx2(
      int N, __m128i *dst, const uint16_t *above, int upsample_above, int dx) {
    const int frac_bits = 6 - upsample_above;
    const int max_base_x = ((N + 4) - 1) << upsample_above;
  
    assert(dx > 0);
    // pre-filter above pixels
    // store in temp buffers:
    //   above[x] * 32 + 16
    //   above[x+1] - above[x]
    // final pixels will be calculated as:
    //   (above[x] * 32 + 16 + (above[x+1] - above[x]) * shift) >> 5
    __m256i a0, a1, a32, a16;
    __m256i diff, c3f;
    __m128i a_mbase_x, max_base_x128, base_inc128, mask128;
    __m128i a0_128, a1_128;
    a16 = _mm256_set1_epi16(16);
    a_mbase_x = _mm_set1_epi16(above[max_base_x]);
    max_base_x128 = _mm_set1_epi16(max_base_x);
    c3f = _mm256_set1_epi16(0x3f);
  
    int x = dx;
    for (int r = 0; r < N; r++) {
      __m256i b, res, shift;
      __m128i res1;
  
      int base = x >> frac_bits;
      if (base >= max_base_x) {
        for (int i = r; i < N; ++i) {
          dst[i] = a_mbase_x;  // save 4 values
        }
        return;
      }
  
      a0_128 = _mm_loadu_si128((__m128i *)(above + base));
      a1_128 = _mm_loadu_si128((__m128i *)(above + base + 1));
  
      if (upsample_above) {
        a0_128 = _mm_shuffle_epi8(a0_128, *(__m128i *)HighbdEvenOddMaskx4[0]);
        a1_128 = _mm_srli_si128(a0_128, 8);
  
        base_inc128 = _mm_setr_epi16(base, base + 2, base + 4, base + 6, base + 8,
                                     base + 10, base + 12, base + 14);
        shift = _mm256_srli_epi16(
            _mm256_and_si256(
                _mm256_slli_epi16(_mm256_set1_epi16(x), upsample_above),
                _mm256_set1_epi16(0x3f)),
            1);
      } else {
        base_inc128 = _mm_setr_epi16(base, base + 1, base + 2, base + 3, base + 4,
                                     base + 5, base + 6, base + 7);
        shift = _mm256_srli_epi16(_mm256_and_si256(_mm256_set1_epi16(x), c3f), 1);
      }
      a0 = _mm256_castsi128_si256(a0_128);
      a1 = _mm256_castsi128_si256(a1_128);
      diff = _mm256_sub_epi16(a1, a0);   // a[x+1] - a[x]
      a32 = _mm256_slli_epi16(a0, 5);    // a[x] * 32
      a32 = _mm256_add_epi16(a32, a16);  // a[x] * 32 + 16
  
      b = _mm256_mullo_epi16(diff, shift);
      res = _mm256_add_epi16(a32, b);
      res = _mm256_srli_epi16(res, 5);
      res1 = _mm256_castsi256_si128(res);
  
      mask128 = _mm_cmpgt_epi16(max_base_x128, base_inc128);
      dst[r] = _mm_blendv_epi8(a_mbase_x, res1, mask128);
      x += dx;
    }
  }
  
  static AOM_FORCE_INLINE void highbd_dr_prediction_32bit_z1_4xN_internal_avx2(
      int N, __m128i *dst, const uint16_t *above, int upsample_above, int dx) {
    const int frac_bits = 6 - upsample_above;
    const int max_base_x = ((N + 4) - 1) << upsample_above;
  
    assert(dx > 0);
    // pre-filter above pixels
    // store in temp buffers:
    //   above[x] * 32 + 16
    //   above[x+1] - above[x]
    // final pixels will be calculated as:
    //   (above[x] * 32 + 16 + (above[x+1] - above[x]) * shift) >> 5
    __m256i a0, a1, a32, a16;
    __m256i diff;
    __m128i a_mbase_x, max_base_x128, base_inc128, mask128;
  
    a16 = _mm256_set1_epi32(16);
    a_mbase_x = _mm_set1_epi16(above[max_base_x]);
    max_base_x128 = _mm_set1_epi32(max_base_x);
  
    int x = dx;
    for (int r = 0; r < N; r++) {
      __m256i b, res, shift;
      __m128i res1;
  
      int base = x >> frac_bits;
      if (base >= max_base_x) {
        for (int i = r; i < N; ++i) {
          dst[i] = a_mbase_x;  // save 4 values
        }
        return;
      }
  
      a0 = _mm256_cvtepu16_epi32(_mm_loadu_si128((__m128i *)(above + base)));
      a1 = _mm256_cvtepu16_epi32(_mm_loadu_si128((__m128i *)(above + base + 1)));
  
      if (upsample_above) {
        a0 = _mm256_permutevar8x32_epi32(
            a0, _mm256_set_epi32(7, 5, 3, 1, 6, 4, 2, 0));
        a1 = _mm256_castsi128_si256(_mm256_extracti128_si256(a0, 1));
        base_inc128 = _mm_setr_epi32(base, base + 2, base + 4, base + 6);
        shift = _mm256_srli_epi32(
            _mm256_and_si256(
                _mm256_slli_epi32(_mm256_set1_epi32(x), upsample_above),
                _mm256_set1_epi32(0x3f)),
            1);
      } else {
        base_inc128 = _mm_setr_epi32(base, base + 1, base + 2, base + 3);
        shift = _mm256_srli_epi32(
            _mm256_and_si256(_mm256_set1_epi32(x), _mm256_set1_epi32(0x3f)), 1);
      }
  
      diff = _mm256_sub_epi32(a1, a0);   // a[x+1] - a[x]
      a32 = _mm256_slli_epi32(a0, 5);    // a[x] * 32
      a32 = _mm256_add_epi32(a32, a16);  // a[x] * 32 + 16
  
      b = _mm256_mullo_epi32(diff, shift);
      res = _mm256_add_epi32(a32, b);
      res = _mm256_srli_epi32(res, 5);
  
      res1 = _mm256_castsi256_si128(res);
      res1 = _mm_packus_epi32(res1, res1);
  
      mask128 = _mm_cmpgt_epi32(max_base_x128, base_inc128);
      mask128 = _mm_packs_epi32(mask128, mask128);  // goto 16 bit
      dst[r] = _mm_blendv_epi8(a_mbase_x, res1, mask128);
      x += dx;
    }
  }
  
  static void highbd_dr_prediction_z1_4xN_avx2(int N, uint16_t *dst,
                                               ptrdiff_t stride,
                                               const uint16_t *above,
                                               int upsample_above, int dx,
                                               int bd) {
    __m128i dstvec[16];
    if (bd < 12) {
      highbd_dr_prediction_z1_4xN_internal_avx2(N, dstvec, above, upsample_above,
                                                dx);
    } else {
      highbd_dr_prediction_32bit_z1_4xN_internal_avx2(N, dstvec, above,
                                                      upsample_above, dx);
    }
    for (int i = 0; i < N; i++) {
      _mm_storel_epi64((__m128i *)(dst + stride * i), dstvec[i]);
    }
  }
  
  static AOM_FORCE_INLINE void highbd_dr_prediction_32bit_z1_8xN_internal_avx2(
      int N, __m128i *dst, const uint16_t *above, int upsample_above, int dx) {
    const int frac_bits = 6 - upsample_above;
    const int max_base_x = ((8 + N) - 1) << upsample_above;
  
    assert(dx > 0);
    // pre-filter above pixels
    // store in temp buffers:
    //   above[x] * 32 + 16
    //   above[x+1] - above[x]
    // final pixels will be calculated as:
    //   (above[x] * 32 + 16 + (above[x+1] - above[x]) * shift) >> 5
    __m256i a0, a1, a0_1, a1_1, a32, a16;
    __m256i a_mbase_x, diff, max_base_x256, base_inc256, mask256;
  
    a16 = _mm256_set1_epi32(16);
    a_mbase_x = _mm256_set1_epi16(above[max_base_x]);
    max_base_x256 = _mm256_set1_epi32(max_base_x);
  
    int x = dx;
    for (int r = 0; r < N; r++) {
      __m256i b, res, res1, shift;
  
      int base = x >> frac_bits;
      if (base >= max_base_x) {
        for (int i = r; i < N; ++i) {
          dst[i] = _mm256_castsi256_si128(a_mbase_x);  // save 8 values
        }
        return;
      }
  
      a0 = _mm256_cvtepu16_epi32(_mm_loadu_si128((__m128i *)(above + base)));
      a1 = _mm256_cvtepu16_epi32(_mm_loadu_si128((__m128i *)(above + base + 1)));
  
      if (upsample_above) {
        a0 = _mm256_permutevar8x32_epi32(
            a0, _mm256_set_epi32(7, 5, 3, 1, 6, 4, 2, 0));
        a1 = _mm256_castsi128_si256(_mm256_extracti128_si256(a0, 1));
  
        a0_1 =
            _mm256_cvtepu16_epi32(_mm_loadu_si128((__m128i *)(above + base + 8)));
        a0_1 = _mm256_permutevar8x32_epi32(
            a0_1, _mm256_set_epi32(7, 5, 3, 1, 6, 4, 2, 0));
        a1_1 = _mm256_castsi128_si256(_mm256_extracti128_si256(a0_1, 1));
  
        a0 = _mm256_inserti128_si256(a0, _mm256_castsi256_si128(a0_1), 1);
        a1 = _mm256_inserti128_si256(a1, _mm256_castsi256_si128(a1_1), 1);
        base_inc256 =
            _mm256_setr_epi32(base, base + 2, base + 4, base + 6, base + 8,
                              base + 10, base + 12, base + 14);
        shift = _mm256_srli_epi32(
            _mm256_and_si256(
                _mm256_slli_epi32(_mm256_set1_epi32(x), upsample_above),
                _mm256_set1_epi32(0x3f)),
            1);
      } else {
        base_inc256 = _mm256_setr_epi32(base, base + 1, base + 2, base + 3,
                                        base + 4, base + 5, base + 6, base + 7);
        shift = _mm256_srli_epi32(
            _mm256_and_si256(_mm256_set1_epi32(x), _mm256_set1_epi32(0x3f)), 1);
      }
  
      diff = _mm256_sub_epi32(a1, a0);   // a[x+1] - a[x]
      a32 = _mm256_slli_epi32(a0, 5);    // a[x] * 32
      a32 = _mm256_add_epi32(a32, a16);  // a[x] * 32 + 16
  
      b = _mm256_mullo_epi32(diff, shift);
      res = _mm256_add_epi32(a32, b);
      res = _mm256_srli_epi32(res, 5);
  
      res1 = _mm256_packus_epi32(
          res, _mm256_castsi128_si256(_mm256_extracti128_si256(res, 1)));
  
      mask256 = _mm256_cmpgt_epi32(max_base_x256, base_inc256);
      mask256 = _mm256_packs_epi32(
          mask256, _mm256_castsi128_si256(
                       _mm256_extracti128_si256(mask256, 1)));  // goto 16 bit
      res1 = _mm256_blendv_epi8(a_mbase_x, res1, mask256);
      dst[r] = _mm256_castsi256_si128(res1);
      x += dx;
    }
  }
  
  static AOM_FORCE_INLINE void highbd_dr_prediction_z1_8xN_internal_avx2(
      int N, __m128i *dst, const uint16_t *above, int upsample_above, int dx) {
    const int frac_bits = 6 - upsample_above;
    const int max_base_x = ((8 + N) - 1) << upsample_above;
  
    assert(dx > 0);
    // pre-filter above pixels
    // store in temp buffers:
    //   above[x] * 32 + 16
    //   above[x+1] - above[x]
    // final pixels will be calculated as:
    //   (above[x] * 32 + 16 + (above[x+1] - above[x]) * shift) >> 5
    __m256i a0, a1, a32, a16, c3f;
    __m256i a_mbase_x, diff, max_base_x256, base_inc256, mask256;
    __m128i a0_x128, a1_x128;
  
    a16 = _mm256_set1_epi16(16);
    a_mbase_x = _mm256_set1_epi16(above[max_base_x]);
    max_base_x256 = _mm256_set1_epi16(max_base_x);
    c3f = _mm256_set1_epi16(0x3f);
  
    int x = dx;
    for (int r = 0; r < N; r++) {
      __m256i b, res, res1, shift;
  
      int base = x >> frac_bits;
      if (base >= max_base_x) {
        for (int i = r; i < N; ++i) {
          dst[i] = _mm256_castsi256_si128(a_mbase_x);  // save 8 values
        }
        return;
      }
  
      a0_x128 = _mm_loadu_si128((__m128i *)(above + base));
      if (upsample_above) {
        __m128i mask, atmp0, atmp1, atmp2, atmp3;
        a1_x128 = _mm_loadu_si128((__m128i *)(above + base + 8));
        atmp0 = _mm_shuffle_epi8(a0_x128, *(__m128i *)HighbdEvenOddMaskx[0]);
        atmp1 = _mm_shuffle_epi8(a1_x128, *(__m128i *)HighbdEvenOddMaskx[0]);
        atmp2 =
            _mm_shuffle_epi8(a0_x128, *(__m128i *)(HighbdEvenOddMaskx[0] + 16));
        atmp3 =
            _mm_shuffle_epi8(a1_x128, *(__m128i *)(HighbdEvenOddMaskx[0] + 16));
        mask =
            _mm_cmpgt_epi8(*(__m128i *)HighbdEvenOddMaskx[0], _mm_set1_epi8(15));
        a0_x128 = _mm_blendv_epi8(atmp0, atmp1, mask);
        mask = _mm_cmpgt_epi8(*(__m128i *)(HighbdEvenOddMaskx[0] + 16),
                              _mm_set1_epi8(15));
        a1_x128 = _mm_blendv_epi8(atmp2, atmp3, mask);
  
        base_inc256 = _mm256_setr_epi16(base, base + 2, base + 4, base + 6,
                                        base + 8, base + 10, base + 12, base + 14,
                                        0, 0, 0, 0, 0, 0, 0, 0);
        shift = _mm256_srli_epi16(
            _mm256_and_si256(
                _mm256_slli_epi16(_mm256_set1_epi16(x), upsample_above), c3f),
            1);
      } else {
        a1_x128 = _mm_loadu_si128((__m128i *)(above + base + 1));
        base_inc256 = _mm256_setr_epi16(base, base + 1, base + 2, base + 3,
                                        base + 4, base + 5, base + 6, base + 7, 0,
                                        0, 0, 0, 0, 0, 0, 0);
        shift = _mm256_srli_epi16(_mm256_and_si256(_mm256_set1_epi16(x), c3f), 1);
      }
      a0 = _mm256_castsi128_si256(a0_x128);
      a1 = _mm256_castsi128_si256(a1_x128);
  
      diff = _mm256_sub_epi16(a1, a0);   // a[x+1] - a[x]
      a32 = _mm256_slli_epi16(a0, 5);    // a[x] * 32
      a32 = _mm256_add_epi16(a32, a16);  // a[x] * 32 + 16
  
      b = _mm256_mullo_epi16(diff, shift);
      res = _mm256_add_epi16(a32, b);
      res = _mm256_srli_epi16(res, 5);
  
      mask256 = _mm256_cmpgt_epi16(max_base_x256, base_inc256);
      res1 = _mm256_blendv_epi8(a_mbase_x, res, mask256);
      dst[r] = _mm256_castsi256_si128(res1);
      x += dx;
    }
  }
  
  static void highbd_dr_prediction_z1_8xN_avx2(int N, uint16_t *dst,
                                               ptrdiff_t stride,
                                               const uint16_t *above,
                                               int upsample_above, int dx,
                                               int bd) {
    __m128i dstvec[32];
    if (bd < 12) {
      highbd_dr_prediction_z1_8xN_internal_avx2(N, dstvec, above, upsample_above,
                                                dx);
    } else {
      highbd_dr_prediction_32bit_z1_8xN_internal_avx2(N, dstvec, above,
                                                      upsample_above, dx);
    }
    for (int i = 0; i < N; i++) {
      _mm_storeu_si128((__m128i *)(dst + stride * i), dstvec[i]);
    }
  }
  
  static AOM_FORCE_INLINE void highbd_dr_prediction_32bit_z1_16xN_internal_avx2(
      int N, __m256i *dstvec, const uint16_t *above, int upsample_above, int dx) {
    // here upsample_above is 0 by design of av1_use_intra_edge_upsample
    (void)upsample_above;
    const int frac_bits = 6;
    const int max_base_x = ((16 + N) - 1);
  
    // pre-filter above pixels
    // store in temp buffers:
    //   above[x] * 32 + 16
    //   above[x+1] - above[x]
    // final pixels will be calculated as:
    //   (above[x] * 32 + 16 + (above[x+1] - above[x]) * shift) >> 5
    __m256i a0, a0_1, a1, a1_1, a32, a16;
    __m256i a_mbase_x, diff, max_base_x256, base_inc256, mask256;
  
    a16 = _mm256_set1_epi32(16);
    a_mbase_x = _mm256_set1_epi16(above[max_base_x]);
    max_base_x256 = _mm256_set1_epi16(max_base_x);
  
    int x = dx;
    for (int r = 0; r < N; r++) {
      __m256i b, res[2], res1;
  
      int base = x >> frac_bits;
      if (base >= max_base_x) {
        for (int i = r; i < N; ++i) {
          dstvec[i] = a_mbase_x;  // save 16 values
        }
        return;
      }
      __m256i shift = _mm256_srli_epi32(
          _mm256_and_si256(_mm256_set1_epi32(x), _mm256_set1_epi32(0x3f)), 1);
  
      a0 = _mm256_cvtepu16_epi32(_mm_loadu_si128((__m128i *)(above + base)));
      a1 = _mm256_cvtepu16_epi32(_mm_loadu_si128((__m128i *)(above + base + 1)));
  
      diff = _mm256_sub_epi32(a1, a0);   // a[x+1] - a[x]
      a32 = _mm256_slli_epi32(a0, 5);    // a[x] * 32
      a32 = _mm256_add_epi32(a32, a16);  // a[x] * 32 + 16
      b = _mm256_mullo_epi32(diff, shift);
  
      res[0] = _mm256_add_epi32(a32, b);
      res[0] = _mm256_srli_epi32(res[0], 5);
      res[0] = _mm256_packus_epi32(
          res[0], _mm256_castsi128_si256(_mm256_extracti128_si256(res[0], 1)));
  
      int mdif = max_base_x - base;
      if (mdif > 8) {
        a0_1 =
            _mm256_cvtepu16_epi32(_mm_loadu_si128((__m128i *)(above + base + 8)));
        a1_1 =
            _mm256_cvtepu16_epi32(_mm_loadu_si128((__m128i *)(above + base + 9)));
  
        diff = _mm256_sub_epi32(a1_1, a0_1);  // a[x+1] - a[x]
        a32 = _mm256_slli_epi32(a0_1, 5);     // a[x] * 32
        a32 = _mm256_add_epi32(a32, a16);     // a[x] * 32 + 16
        b = _mm256_mullo_epi32(diff, shift);
  
        res[1] = _mm256_add_epi32(a32, b);
        res[1] = _mm256_srli_epi32(res[1], 5);
        res[1] = _mm256_packus_epi32(
            res[1], _mm256_castsi128_si256(_mm256_extracti128_si256(res[1], 1)));
      } else {
        res[1] = a_mbase_x;
      }
      res1 = _mm256_inserti128_si256(res[0], _mm256_castsi256_si128(res[1]),
                                     1);  // 16 16bit values
  
      base_inc256 = _mm256_setr_epi16(base, base + 1, base + 2, base + 3,
                                      base + 4, base + 5, base + 6, base + 7,
                                      base + 8, base + 9, base + 10, base + 11,
                                      base + 12, base + 13, base + 14, base + 15);
      mask256 = _mm256_cmpgt_epi16(max_base_x256, base_inc256);
      dstvec[r] = _mm256_blendv_epi8(a_mbase_x, res1, mask256);
      x += dx;
    }
  }
  
  static AOM_FORCE_INLINE void highbd_dr_prediction_z1_16xN_internal_avx2(
      int N, __m256i *dstvec, const uint16_t *above, int upsample_above, int dx) {
    // here upsample_above is 0 by design of av1_use_intra_edge_upsample
    (void)upsample_above;
    const int frac_bits = 6;
    const int max_base_x = ((16 + N) - 1);
  
    // pre-filter above pixels
    // store in temp buffers:
    //   above[x] * 32 + 16
    //   above[x+1] - above[x]
    // final pixels will be calculated as:
    //   (above[x] * 32 + 16 + (above[x+1] - above[x]) * shift) >> 5
    __m256i a0, a1, a32, a16, c3f;
    __m256i a_mbase_x, diff, max_base_x256, base_inc256, mask256;
  
    a16 = _mm256_set1_epi16(16);
    a_mbase_x = _mm256_set1_epi16(above[max_base_x]);
    max_base_x256 = _mm256_set1_epi16(max_base_x);
    c3f = _mm256_set1_epi16(0x3f);
  
    int x = dx;
    for (int r = 0; r < N; r++) {
      __m256i b, res;
  
      int base = x >> frac_bits;
      if (base >= max_base_x) {
        for (int i = r; i < N; ++i) {
          dstvec[i] = a_mbase_x;  // save 16 values
        }
        return;
      }
      __m256i shift =
          _mm256_srli_epi16(_mm256_and_si256(_mm256_set1_epi16(x), c3f), 1);
  
      a0 = _mm256_loadu_si256((__m256i *)(above + base));
      a1 = _mm256_loadu_si256((__m256i *)(above + base + 1));
  
      diff = _mm256_sub_epi16(a1, a0);   // a[x+1] - a[x]
      a32 = _mm256_slli_epi16(a0, 5);    // a[x] * 32
      a32 = _mm256_add_epi16(a32, a16);  // a[x] * 32 + 16
      b = _mm256_mullo_epi16(diff, shift);
  
      res = _mm256_add_epi16(a32, b);
      res = _mm256_srli_epi16(res, 5);  // 16 16bit values
  
      base_inc256 = _mm256_setr_epi16(base, base + 1, base + 2, base + 3,
                                      base + 4, base + 5, base + 6, base + 7,
                                      base + 8, base + 9, base + 10, base + 11,
                                      base + 12, base + 13, base + 14, base + 15);
      mask256 = _mm256_cmpgt_epi16(max_base_x256, base_inc256);
      dstvec[r] = _mm256_blendv_epi8(a_mbase_x, res, mask256);
      x += dx;
    }
  }
  
  static void highbd_dr_prediction_z1_16xN_avx2(int N, uint16_t *dst,
                                                ptrdiff_t stride,
                                                const uint16_t *above,
                                                int upsample_above, int dx,
                                                int bd) {
    __m256i dstvec[64];
    if (bd < 12) {
      highbd_dr_prediction_z1_16xN_internal_avx2(N, dstvec, above, upsample_above,
                                                 dx);
    } else {
      highbd_dr_prediction_32bit_z1_16xN_internal_avx2(N, dstvec, above,
                                                       upsample_above, dx);
    }
    for (int i = 0; i < N; i++) {
      _mm256_storeu_si256((__m256i *)(dst + stride * i), dstvec[i]);
    }
  }
  
  static AOM_FORCE_INLINE void highbd_dr_prediction_32bit_z1_32xN_internal_avx2(
      int N, __m256i *dstvec, const uint16_t *above, int upsample_above, int dx) {
    // here upsample_above is 0 by design of av1_use_intra_edge_upsample
    (void)upsample_above;
    const int frac_bits = 6;
    const int max_base_x = ((32 + N) - 1);
  
    // pre-filter above pixels
    // store in temp buffers:
    //   above[x] * 32 + 16
    //   above[x+1] - above[x]
    // final pixels will be calculated as:
    //   (above[x] * 32 + 16 + (above[x+1] - above[x]) * shift) >> 5
    __m256i a0, a0_1, a1, a1_1, a32, a16, c3f;
    __m256i a_mbase_x, diff, max_base_x256, base_inc256, mask256;
  
    a16 = _mm256_set1_epi32(16);
    a_mbase_x = _mm256_set1_epi16(above[max_base_x]);
    max_base_x256 = _mm256_set1_epi16(max_base_x);
    c3f = _mm256_set1_epi16(0x3f);
  
    int x = dx;
    for (int r = 0; r < N; r++) {
      __m256i b, res[2], res1;
  
      int base = x >> frac_bits;
      if (base >= max_base_x) {
        for (int i = r; i < N; ++i) {
          dstvec[i] = a_mbase_x;  // save 32 values
          dstvec[i + N] = a_mbase_x;
        }
        return;
      }
  
      __m256i shift =
          _mm256_srli_epi32(_mm256_and_si256(_mm256_set1_epi32(x), c3f), 1);
  
      for (int j = 0; j < 32; j += 16) {
        int mdif = max_base_x - (base + j);
        if (mdif <= 0) {
          res1 = a_mbase_x;
        } else {
          a0 = _mm256_cvtepu16_epi32(
              _mm_loadu_si128((__m128i *)(above + base + j)));
          a1 = _mm256_cvtepu16_epi32(
              _mm_loadu_si128((__m128i *)(above + base + 1 + j)));
  
          diff = _mm256_sub_epi32(a1, a0);   // a[x+1] - a[x]
          a32 = _mm256_slli_epi32(a0, 5);    // a[x] * 32
          a32 = _mm256_add_epi32(a32, a16);  // a[x] * 32 + 16
          b = _mm256_mullo_epi32(diff, shift);
  
          res[0] = _mm256_add_epi32(a32, b);
          res[0] = _mm256_srli_epi32(res[0], 5);
          res[0] = _mm256_packus_epi32(
              res[0],
              _mm256_castsi128_si256(_mm256_extracti128_si256(res[0], 1)));
          if (mdif > 8) {
            a0_1 = _mm256_cvtepu16_epi32(
                _mm_loadu_si128((__m128i *)(above + base + 8 + j)));
            a1_1 = _mm256_cvtepu16_epi32(
                _mm_loadu_si128((__m128i *)(above + base + 9 + j)));
  
            diff = _mm256_sub_epi32(a1_1, a0_1);  // a[x+1] - a[x]
            a32 = _mm256_slli_epi32(a0_1, 5);     // a[x] * 32
            a32 = _mm256_add_epi32(a32, a16);     // a[x] * 32 + 16
            b = _mm256_mullo_epi32(diff, shift);
  
            res[1] = _mm256_add_epi32(a32, b);
            res[1] = _mm256_srli_epi32(res[1], 5);
            res[1] = _mm256_packus_epi32(
                res[1],
                _mm256_castsi128_si256(_mm256_extracti128_si256(res[1], 1)));
          } else {
            res[1] = a_mbase_x;
          }
          res1 = _mm256_inserti128_si256(res[0], _mm256_castsi256_si128(res[1]),
                                         1);  // 16 16bit values
          base_inc256 = _mm256_setr_epi16(
              base + j, base + j + 1, base + j + 2, base + j + 3, base + j + 4,
              base + j + 5, base + j + 6, base + j + 7, base + j + 8,
              base + j + 9, base + j + 10, base + j + 11, base + j + 12,
              base + j + 13, base + j + 14, base + j + 15);
  
          mask256 = _mm256_cmpgt_epi16(max_base_x256, base_inc256);
          res1 = _mm256_blendv_epi8(a_mbase_x, res1, mask256);
        }
        if (!j) {
          dstvec[r] = res1;
        } else {
          dstvec[r + N] = res1;
        }
      }
      x += dx;
    }
  }
  
  static AOM_FORCE_INLINE void highbd_dr_prediction_z1_32xN_internal_avx2(
      int N, __m256i *dstvec, const uint16_t *above, int upsample_above, int dx) {
    // here upsample_above is 0 by design of av1_use_intra_edge_upsample
    (void)upsample_above;
    const int frac_bits = 6;
    const int max_base_x = ((32 + N) - 1);
  
    // pre-filter above pixels
    // store in temp buffers:
    //   above[x] * 32 + 16
    //   above[x+1] - above[x]
    // final pixels will be calculated as:
    //   (above[x] * 32 + 16 + (above[x+1] - above[x]) * shift) >> 5
    __m256i a0, a1, a32, a16, c3f;
    __m256i a_mbase_x, diff, max_base_x256, base_inc256, mask256;
  
    a16 = _mm256_set1_epi16(16);
    a_mbase_x = _mm256_set1_epi16(above[max_base_x]);
    max_base_x256 = _mm256_set1_epi16(max_base_x);
    c3f = _mm256_set1_epi16(0x3f);
  
    int x = dx;
    for (int r = 0; r < N; r++) {
      __m256i b, res;
  
      int base = x >> frac_bits;
      if (base >= max_base_x) {
        for (int i = r; i < N; ++i) {
          dstvec[i] = a_mbase_x;  // save 32 values
          dstvec[i + N] = a_mbase_x;
        }
        return;
      }
  
      __m256i shift =
          _mm256_srli_epi16(_mm256_and_si256(_mm256_set1_epi16(x), c3f), 1);
  
      for (int j = 0; j < 32; j += 16) {
        int mdif = max_base_x - (base + j);
        if (mdif <= 0) {
          res = a_mbase_x;
        } else {
          a0 = _mm256_loadu_si256((__m256i *)(above + base + j));
          a1 = _mm256_loadu_si256((__m256i *)(above + base + 1 + j));
  
          diff = _mm256_sub_epi16(a1, a0);   // a[x+1] - a[x]
          a32 = _mm256_slli_epi16(a0, 5);    // a[x] * 32
          a32 = _mm256_add_epi16(a32, a16);  // a[x] * 32 + 16
          b = _mm256_mullo_epi16(diff, shift);
  
          res = _mm256_add_epi16(a32, b);
          res = _mm256_srli_epi16(res, 5);
  
          base_inc256 = _mm256_setr_epi16(
              base + j, base + j + 1, base + j + 2, base + j + 3, base + j + 4,
              base + j + 5, base + j + 6, base + j + 7, base + j + 8,
              base + j + 9, base + j + 10, base + j + 11, base + j + 12,
              base + j + 13, base + j + 14, base + j + 15);
  
          mask256 = _mm256_cmpgt_epi16(max_base_x256, base_inc256);
          res = _mm256_blendv_epi8(a_mbase_x, res, mask256);
        }
        if (!j) {
          dstvec[r] = res;
        } else {
          dstvec[r + N] = res;
        }
      }
      x += dx;
    }
  }
  
  static void highbd_dr_prediction_z1_32xN_avx2(int N, uint16_t *dst,
                                                ptrdiff_t stride,
                                                const uint16_t *above,
                                                int upsample_above, int dx,
                                                int bd) {
    __m256i dstvec[128];
    if (bd < 12) {
      highbd_dr_prediction_z1_32xN_internal_avx2(N, dstvec, above, upsample_above,
                                                 dx);
    } else {
      highbd_dr_prediction_32bit_z1_32xN_internal_avx2(N, dstvec, above,
                                                       upsample_above, dx);
    }
    for (int i = 0; i < N; i++) {
      _mm256_storeu_si256((__m256i *)(dst + stride * i), dstvec[i]);
      _mm256_storeu_si256((__m256i *)(dst + stride * i + 16), dstvec[i + N]);
    }
  }
  
  static void highbd_dr_prediction_32bit_z1_64xN_avx2(int N, uint16_t *dst,
                                                      ptrdiff_t stride,
                                                      const uint16_t *above,
                                                      int upsample_above,
                                                      int dx) {
    // here upsample_above is 0 by design of av1_use_intra_edge_upsample
    (void)upsample_above;
    const int frac_bits = 6;
    const int max_base_x = ((64 + N) - 1);
  
    // pre-filter above pixels
    // store in temp buffers:
    //   above[x] * 32 + 16
    //   above[x+1] - above[x]
    // final pixels will be calculated as:
    //   (above[x] * 32 + 16 + (above[x+1] - above[x]) * shift) >> 5
    __m256i a0, a0_1, a1, a1_1, a32, a16;
    __m256i a_mbase_x, diff, max_base_x256, base_inc256, mask256;
  
    a16 = _mm256_set1_epi32(16);
    a_mbase_x = _mm256_set1_epi16(above[max_base_x]);
    max_base_x256 = _mm256_set1_epi16(max_base_x);
  
    int x = dx;
    for (int r = 0; r < N; r++, dst += stride) {
      __m256i b, res[2], res1;
  
      int base = x >> frac_bits;
      if (base >= max_base_x) {
        for (int i = r; i < N; ++i) {
          _mm256_storeu_si256((__m256i *)dst, a_mbase_x);  // save 32 values
          _mm256_storeu_si256((__m256i *)(dst + 16), a_mbase_x);
          _mm256_storeu_si256((__m256i *)(dst + 32), a_mbase_x);
          _mm256_storeu_si256((__m256i *)(dst + 48), a_mbase_x);
          dst += stride;
        }
        return;
      }
  
      __m256i shift = _mm256_srli_epi32(
          _mm256_and_si256(_mm256_set1_epi32(x), _mm256_set1_epi32(0x3f)), 1);
  
      __m128i a0_128, a0_1_128, a1_128, a1_1_128;
      for (int j = 0; j < 64; j += 16) {
        int mdif = max_base_x - (base + j);
        if (mdif <= 0) {
          _mm256_storeu_si256((__m256i *)(dst + j), a_mbase_x);
        } else {
          a0_128 = _mm_loadu_si128((__m128i *)(above + base + j));
          a1_128 = _mm_loadu_si128((__m128i *)(above + base + 1 + j));
          a0 = _mm256_cvtepu16_epi32(a0_128);
          a1 = _mm256_cvtepu16_epi32(a1_128);
  
          diff = _mm256_sub_epi32(a1, a0);   // a[x+1] - a[x]
          a32 = _mm256_slli_epi32(a0, 5);    // a[x] * 32
          a32 = _mm256_add_epi32(a32, a16);  // a[x] * 32 + 16
          b = _mm256_mullo_epi32(diff, shift);
  
          res[0] = _mm256_add_epi32(a32, b);
          res[0] = _mm256_srli_epi32(res[0], 5);
          res[0] = _mm256_packus_epi32(
              res[0],
              _mm256_castsi128_si256(_mm256_extracti128_si256(res[0], 1)));
          if (mdif > 8) {
            a0_1_128 = _mm_loadu_si128((__m128i *)(above + base + 8 + j));
            a1_1_128 = _mm_loadu_si128((__m128i *)(above + base + 9 + j));
            a0_1 = _mm256_cvtepu16_epi32(a0_1_128);
            a1_1 = _mm256_cvtepu16_epi32(a1_1_128);
  
            diff = _mm256_sub_epi32(a1_1, a0_1);  // a[x+1] - a[x]
            a32 = _mm256_slli_epi32(a0_1, 5);     // a[x] * 32
            a32 = _mm256_add_epi32(a32, a16);     // a[x] * 32 + 16
            b = _mm256_mullo_epi32(diff, shift);
  
            res[1] = _mm256_add_epi32(a32, b);
            res[1] = _mm256_srli_epi32(res[1], 5);
            res[1] = _mm256_packus_epi32(
                res[1],
                _mm256_castsi128_si256(_mm256_extracti128_si256(res[1], 1)));
          } else {
            res[1] = a_mbase_x;
          }
          res1 = _mm256_inserti128_si256(res[0], _mm256_castsi256_si128(res[1]),
                                         1);  // 16 16bit values
          base_inc256 = _mm256_setr_epi16(
              base + j, base + j + 1, base + j + 2, base + j + 3, base + j + 4,
              base + j + 5, base + j + 6, base + j + 7, base + j + 8,
              base + j + 9, base + j + 10, base + j + 11, base + j + 12,
              base + j + 13, base + j + 14, base + j + 15);
  
          mask256 = _mm256_cmpgt_epi16(max_base_x256, base_inc256);
          res1 = _mm256_blendv_epi8(a_mbase_x, res1, mask256);
          _mm256_storeu_si256((__m256i *)(dst + j), res1);
        }
      }
      x += dx;
    }
  }
  
  static void highbd_dr_prediction_z1_64xN_avx2(int N, uint16_t *dst,
                                                ptrdiff_t stride,
                                                const uint16_t *above,
                                                int upsample_above, int dx) {
    // here upsample_above is 0 by design of av1_use_intra_edge_upsample
    (void)upsample_above;
    const int frac_bits = 6;
    const int max_base_x = ((64 + N) - 1);
  
    // pre-filter above pixels
    // store in temp buffers:
    //   above[x] * 32 + 16
    //   above[x+1] - above[x]
    // final pixels will be calculated as:
    //   (above[x] * 32 + 16 + (above[x+1] - above[x]) * shift) >> 5
    __m256i a0, a1, a32, a16, c3f;
    __m256i a_mbase_x, diff, max_base_x256, base_inc256, mask256;
  
    a16 = _mm256_set1_epi16(16);
    a_mbase_x = _mm256_set1_epi16(above[max_base_x]);
    max_base_x256 = _mm256_set1_epi16(max_base_x);
    c3f = _mm256_set1_epi16(0x3f);
  
    int x = dx;
    for (int r = 0; r < N; r++, dst += stride) {
      __m256i b, res;
  
      int base = x >> frac_bits;
      if (base >= max_base_x) {
        for (int i = r; i < N; ++i) {
          _mm256_storeu_si256((__m256i *)dst, a_mbase_x);  // save 32 values
          _mm256_storeu_si256((__m256i *)(dst + 16), a_mbase_x);
          _mm256_storeu_si256((__m256i *)(dst + 32), a_mbase_x);
          _mm256_storeu_si256((__m256i *)(dst + 48), a_mbase_x);
          dst += stride;
        }
        return;
      }
  
      __m256i shift =
          _mm256_srli_epi16(_mm256_and_si256(_mm256_set1_epi16(x), c3f), 1);
  
      for (int j = 0; j < 64; j += 16) {
        int mdif = max_base_x - (base + j);
        if (mdif <= 0) {
          _mm256_storeu_si256((__m256i *)(dst + j), a_mbase_x);
        } else {
          a0 = _mm256_loadu_si256((__m256i *)(above + base + j));
          a1 = _mm256_loadu_si256((__m256i *)(above + base + 1 + j));
  
          diff = _mm256_sub_epi16(a1, a0);   // a[x+1] - a[x]
          a32 = _mm256_slli_epi16(a0, 5);    // a[x] * 32
          a32 = _mm256_add_epi16(a32, a16);  // a[x] * 32 + 16
          b = _mm256_mullo_epi16(diff, shift);
  
          res = _mm256_add_epi16(a32, b);
          res = _mm256_srli_epi16(res, 5);
  
          base_inc256 = _mm256_setr_epi16(
              base + j, base + j + 1, base + j + 2, base + j + 3, base + j + 4,
              base + j + 5, base + j + 6, base + j + 7, base + j + 8,
              base + j + 9, base + j + 10, base + j + 11, base + j + 12,
              base + j + 13, base + j + 14, base + j + 15);
  
          mask256 = _mm256_cmpgt_epi16(max_base_x256, base_inc256);
          res = _mm256_blendv_epi8(a_mbase_x, res, mask256);
          _mm256_storeu_si256((__m256i *)(dst + j), res);  // 16 16bit values
        }
      }
      x += dx;
    }
  }
  
  // Directional prediction, zone 1: 0 < angle < 90
  void av1_highbd_dr_prediction_z1_avx2(uint16_t *dst, ptrdiff_t stride, int bw,
                                        int bh, const uint16_t *above,
                                        const uint16_t *left, int upsample_above,
                                        int dx, int dy, int bd) {
    (void)left;
    (void)dy;
  
    switch (bw) {
      case 4:
        highbd_dr_prediction_z1_4xN_avx2(bh, dst, stride, above, upsample_above,
                                         dx, bd);
        break;
      case 8:
        highbd_dr_prediction_z1_8xN_avx2(bh, dst, stride, above, upsample_above,
                                         dx, bd);
        break;
      case 16:
        highbd_dr_prediction_z1_16xN_avx2(bh, dst, stride, above, upsample_above,
                                          dx, bd);
        break;
      case 32:
        highbd_dr_prediction_z1_32xN_avx2(bh, dst, stride, above, upsample_above,
                                          dx, bd);
        break;
      case 64:
        if (bd < 12) {
          highbd_dr_prediction_z1_64xN_avx2(bh, dst, stride, above,
                                            upsample_above, dx);
        } else {
          highbd_dr_prediction_32bit_z1_64xN_avx2(bh, dst, stride, above,
                                                  upsample_above, dx);
        }
        break;
      default: break;
    }
    return;
  }
  
  static void highbd_transpose_TX_16X16(const uint16_t *src, ptrdiff_t pitchSrc,
                                        uint16_t *dst, ptrdiff_t pitchDst) {
    __m256i r[16];
    __m256i d[16];
    for (int j = 0; j < 16; j++) {
      r[j] = _mm256_loadu_si256((__m256i *)(src + j * pitchSrc));
    }
    highbd_transpose16x16_avx2(r, d);
    for (int j = 0; j < 16; j++) {
      _mm256_storeu_si256((__m256i *)(dst + j * pitchDst), d[j]);
    }
  }
  
  static void highbd_transpose(const uint16_t *src, ptrdiff_t pitchSrc,
                               uint16_t *dst, ptrdiff_t pitchDst, int width,
                               int height) {
    for (int j = 0; j < height; j += 16)
      for (int i = 0; i < width; i += 16)
        highbd_transpose_TX_16X16(src + i * pitchSrc + j, pitchSrc,
                                  dst + j * pitchDst + i, pitchDst);
  }
  
  static void highbd_dr_prediction_32bit_z2_Nx4_avx2(
      int N, uint16_t *dst, ptrdiff_t stride, const uint16_t *above,
      const uint16_t *left, int upsample_above, int upsample_left, int dx,
      int dy) {
    const int min_base_x = -(1 << upsample_above);
    const int min_base_y = -(1 << upsample_left);
    const int frac_bits_x = 6 - upsample_above;
    const int frac_bits_y = 6 - upsample_left;
  
    assert(dx > 0);
    // pre-filter above pixels
    // store in temp buffers:
    //   above[x] * 32 + 16
    //   above[x+1] - above[x]
    // final pixels will be calculated as:
    //   (above[x] * 32 + 16 + (above[x+1] - above[x]) * shift) >> 5
    __m256i a0_x, a1_x, a32, a16;
    __m256i diff;
    __m128i c3f, min_base_y128;
  
    a16 = _mm256_set1_epi32(16);
    c3f = _mm_set1_epi32(0x3f);
    min_base_y128 = _mm_set1_epi32(min_base_y);
  
    for (int r = 0; r < N; r++) {
      __m256i b, res, shift;
      __m128i resx, resy, resxy;
      __m128i a0_x128, a1_x128;
      int y = r + 1;
      int base_x = (-y * dx) >> frac_bits_x;
      int base_shift = 0;
      if (base_x < (min_base_x - 1)) {
        base_shift = (min_base_x - base_x - 1) >> upsample_above;
      }
      int base_min_diff =
          (min_base_x - base_x + upsample_above) >> upsample_above;
      if (base_min_diff > 4) {
        base_min_diff = 4;
      } else {
        if (base_min_diff < 0) base_min_diff = 0;
      }
  
      if (base_shift > 3) {
        a0_x = _mm256_setzero_si256();
        a1_x = _mm256_setzero_si256();
        shift = _mm256_setzero_si256();
      } else {
        a0_x128 = _mm_loadu_si128((__m128i *)(above + base_x + base_shift));
        if (upsample_above) {
          a0_x128 = _mm_shuffle_epi8(a0_x128,
                                     *(__m128i *)HighbdEvenOddMaskx4[base_shift]);
          a1_x128 = _mm_srli_si128(a0_x128, 8);
  
          shift = _mm256_castsi128_si256(_mm_srli_epi32(
              _mm_and_si128(
                  _mm_slli_epi32(
                      _mm_setr_epi32(-y * dx, (1 << 6) - y * dx,
                                     (2 << 6) - y * dx, (3 << 6) - y * dx),
                      upsample_above),
                  c3f),
              1));
        } else {
          a0_x128 =
              _mm_shuffle_epi8(a0_x128, *(__m128i *)HighbdLoadMaskx[base_shift]);
          a1_x128 = _mm_srli_si128(a0_x128, 2);
  
          shift = _mm256_castsi128_si256(_mm_srli_epi32(
              _mm_and_si128(_mm_setr_epi32(-y * dx, (1 << 6) - y * dx,
                                           (2 << 6) - y * dx, (3 << 6) - y * dx),
                            c3f),
              1));
        }
        a0_x = _mm256_cvtepu16_epi32(a0_x128);
        a1_x = _mm256_cvtepu16_epi32(a1_x128);
      }
      // y calc
      __m128i a0_y, a1_y, shifty;
      if (base_x < min_base_x) {
        __m128i r6, c1234, dy128, y_c128, base_y_c128, mask128;
        DECLARE_ALIGNED(32, int, base_y_c[4]);
        r6 = _mm_set1_epi32(r << 6);
        dy128 = _mm_set1_epi32(dy);
        c1234 = _mm_setr_epi32(1, 2, 3, 4);
        y_c128 = _mm_sub_epi32(r6, _mm_mullo_epi32(c1234, dy128));
        base_y_c128 = _mm_srai_epi32(y_c128, frac_bits_y);
        mask128 = _mm_cmpgt_epi32(min_base_y128, base_y_c128);
        base_y_c128 = _mm_andnot_si128(mask128, base_y_c128);
        _mm_store_si128((__m128i *)base_y_c, base_y_c128);
  
        a0_y = _mm_setr_epi32(left[base_y_c[0]], left[base_y_c[1]],
                              left[base_y_c[2]], left[base_y_c[3]]);
        a1_y = _mm_setr_epi32(left[base_y_c[0] + 1], left[base_y_c[1] + 1],
                              left[base_y_c[2] + 1], left[base_y_c[3] + 1]);
  
        if (upsample_left) {
          shifty = _mm_srli_epi32(
              _mm_and_si128(_mm_slli_epi32(y_c128, upsample_left), c3f), 1);
        } else {
          shifty = _mm_srli_epi32(_mm_and_si128(y_c128, c3f), 1);
        }
        a0_x = _mm256_inserti128_si256(a0_x, a0_y, 1);
        a1_x = _mm256_inserti128_si256(a1_x, a1_y, 1);
        shift = _mm256_inserti128_si256(shift, shifty, 1);
      }
  
      diff = _mm256_sub_epi32(a1_x, a0_x);  // a[x+1] - a[x]
      a32 = _mm256_slli_epi32(a0_x, 5);     // a[x] * 32
      a32 = _mm256_add_epi32(a32, a16);     // a[x] * 32 + 16
  
      b = _mm256_mullo_epi32(diff, shift);
      res = _mm256_add_epi32(a32, b);
      res = _mm256_srli_epi32(res, 5);
  
      resx = _mm256_castsi256_si128(res);
      resx = _mm_packus_epi32(resx, resx);
  
      resy = _mm256_extracti128_si256(res, 1);
      resy = _mm_packus_epi32(resy, resy);
  
      resxy =
          _mm_blendv_epi8(resx, resy, *(__m128i *)HighbdBaseMask[base_min_diff]);
      _mm_storel_epi64((__m128i *)(dst), resxy);
      dst += stride;
    }
  }
  
  static void highbd_dr_prediction_z2_Nx4_avx2(
      int N, uint16_t *dst, ptrdiff_t stride, const uint16_t *above,
      const uint16_t *left, int upsample_above, int upsample_left, int dx,
      int dy) {
    const int min_base_x = -(1 << upsample_above);
    const int min_base_y = -(1 << upsample_left);
    const int frac_bits_x = 6 - upsample_above;
    const int frac_bits_y = 6 - upsample_left;
  
    assert(dx > 0);
    // pre-filter above pixels
    // store in temp buffers:
    //   above[x] * 32 + 16
    //   above[x+1] - above[x]
    // final pixels will be calculated as:
    //   (above[x] * 32 + 16 + (above[x+1] - above[x]) * shift) >> 5
    __m256i a0_x, a1_x, a32, a16;
    __m256i diff;
    __m128i c3f, min_base_y128;
  
    a16 = _mm256_set1_epi16(16);
    c3f = _mm_set1_epi16(0x3f);
    min_base_y128 = _mm_set1_epi16(min_base_y);
  
    for (int r = 0; r < N; r++) {
      __m256i b, res, shift;
      __m128i resx, resy, resxy;
      __m128i a0_x128, a1_x128;
      int y = r + 1;
      int base_x = (-y * dx) >> frac_bits_x;
      int base_shift = 0;
      if (base_x < (min_base_x - 1)) {
        base_shift = (min_base_x - base_x - 1) >> upsample_above;
      }
      int base_min_diff =
          (min_base_x - base_x + upsample_above) >> upsample_above;
      if (base_min_diff > 4) {
        base_min_diff = 4;
      } else {
        if (base_min_diff < 0) base_min_diff = 0;
      }
  
      if (base_shift > 3) {
        a0_x = _mm256_setzero_si256();
        a1_x = _mm256_setzero_si256();
        shift = _mm256_setzero_si256();
      } else {
        a0_x128 = _mm_loadu_si128((__m128i *)(above + base_x + base_shift));
        if (upsample_above) {
          a0_x128 = _mm_shuffle_epi8(a0_x128,
                                     *(__m128i *)HighbdEvenOddMaskx4[base_shift]);
          a1_x128 = _mm_srli_si128(a0_x128, 8);
  
          shift = _mm256_castsi128_si256(_mm_srli_epi16(
              _mm_and_si128(
                  _mm_slli_epi16(_mm_setr_epi16(-y * dx, (1 << 6) - y * dx,
                                                (2 << 6) - y * dx,
                                                (3 << 6) - y * dx, 0, 0, 0, 0),
                                 upsample_above),
                  c3f),
              1));
        } else {
          a0_x128 =
              _mm_shuffle_epi8(a0_x128, *(__m128i *)HighbdLoadMaskx[base_shift]);
          a1_x128 = _mm_srli_si128(a0_x128, 2);
  
          shift = _mm256_castsi128_si256(_mm_srli_epi16(
              _mm_and_si128(
                  _mm_setr_epi16(-y * dx, (1 << 6) - y * dx, (2 << 6) - y * dx,
                                 (3 << 6) - y * dx, 0, 0, 0, 0),
                  c3f),
              1));
        }
        a0_x = _mm256_castsi128_si256(a0_x128);
        a1_x = _mm256_castsi128_si256(a1_x128);
      }
      // y calc
      __m128i a0_y, a1_y, shifty;
      if (base_x < min_base_x) {
        __m128i r6, c1234, dy128, y_c128, base_y_c128, mask128;
        DECLARE_ALIGNED(32, int16_t, base_y_c[8]);
        r6 = _mm_set1_epi16(r << 6);
        dy128 = _mm_set1_epi16(dy);
        c1234 = _mm_setr_epi16(1, 2, 3, 4, 0, 0, 0, 0);
        y_c128 = _mm_sub_epi16(r6, _mm_mullo_epi16(c1234, dy128));
        base_y_c128 = _mm_srai_epi16(y_c128, frac_bits_y);
        mask128 = _mm_cmpgt_epi16(min_base_y128, base_y_c128);
        base_y_c128 = _mm_andnot_si128(mask128, base_y_c128);
        _mm_store_si128((__m128i *)base_y_c, base_y_c128);
  
        a0_y = _mm_setr_epi16(left[base_y_c[0]], left[base_y_c[1]],
                              left[base_y_c[2]], left[base_y_c[3]], 0, 0, 0, 0);
        a1_y = _mm_setr_epi16(left[base_y_c[0] + 1], left[base_y_c[1] + 1],
                              left[base_y_c[2] + 1], left[base_y_c[3] + 1], 0, 0,
                              0, 0);
  
        if (upsample_left) {
          shifty = _mm_srli_epi16(
              _mm_and_si128(_mm_slli_epi16(y_c128, upsample_left), c3f), 1);
        } else {
          shifty = _mm_srli_epi16(_mm_and_si128(y_c128, c3f), 1);
        }
        a0_x = _mm256_inserti128_si256(a0_x, a0_y, 1);
        a1_x = _mm256_inserti128_si256(a1_x, a1_y, 1);
        shift = _mm256_inserti128_si256(shift, shifty, 1);
      }
  
      diff = _mm256_sub_epi16(a1_x, a0_x);  // a[x+1] - a[x]
      a32 = _mm256_slli_epi16(a0_x, 5);     // a[x] * 32
      a32 = _mm256_add_epi16(a32, a16);     // a[x] * 32 + 16
  
      b = _mm256_mullo_epi16(diff, shift);
      res = _mm256_add_epi16(a32, b);
      res = _mm256_srli_epi16(res, 5);
  
      resx = _mm256_castsi256_si128(res);
      resy = _mm256_extracti128_si256(res, 1);
      resxy =
          _mm_blendv_epi8(resx, resy, *(__m128i *)HighbdBaseMask[base_min_diff]);
      _mm_storel_epi64((__m128i *)(dst), resxy);
      dst += stride;
    }
  }
  
  static void highbd_dr_prediction_32bit_z2_Nx8_avx2(
      int N, uint16_t *dst, ptrdiff_t stride, const uint16_t *above,
      const uint16_t *left, int upsample_above, int upsample_left, int dx,
      int dy) {
    const int min_base_x = -(1 << upsample_above);
    const int min_base_y = -(1 << upsample_left);
    const int frac_bits_x = 6 - upsample_above;
    const int frac_bits_y = 6 - upsample_left;
  
    // pre-filter above pixels
    // store in temp buffers:
    //   above[x] * 32 + 16
    //   above[x+1] - above[x]
    // final pixels will be calculated as:
    //   (above[x] * 32 + 16 + (above[x+1] - above[x]) * shift) >> 5
    __m256i a0_x, a1_x, a0_y, a1_y, a32, a16, c3f, min_base_y256;
    __m256i diff;
    __m128i a0_x128, a1_x128;
  
    a16 = _mm256_set1_epi32(16);
    c3f = _mm256_set1_epi32(0x3f);
    min_base_y256 = _mm256_set1_epi32(min_base_y);
  
    for (int r = 0; r < N; r++) {
      __m256i b, res, shift;
      __m128i resx, resy, resxy;
      int y = r + 1;
      int base_x = (-y * dx) >> frac_bits_x;
      int base_shift = 0;
      if (base_x < (min_base_x - 1)) {
        base_shift = (min_base_x - base_x - 1) >> upsample_above;
      }
      int base_min_diff =
          (min_base_x - base_x + upsample_above) >> upsample_above;
      if (base_min_diff > 8) {
        base_min_diff = 8;
      } else {
        if (base_min_diff < 0) base_min_diff = 0;
      }
  
      if (base_shift > 7) {
        resx = _mm_setzero_si128();
      } else {
        a0_x128 = _mm_loadu_si128((__m128i *)(above + base_x + base_shift));
        if (upsample_above) {
          __m128i mask, atmp0, atmp1, atmp2, atmp3;
          a1_x128 = _mm_loadu_si128((__m128i *)(above + base_x + 8 + base_shift));
          atmp0 = _mm_shuffle_epi8(a0_x128,
                                   *(__m128i *)HighbdEvenOddMaskx[base_shift]);
          atmp1 = _mm_shuffle_epi8(a1_x128,
                                   *(__m128i *)HighbdEvenOddMaskx[base_shift]);
          atmp2 = _mm_shuffle_epi8(
              a0_x128, *(__m128i *)(HighbdEvenOddMaskx[base_shift] + 16));
          atmp3 = _mm_shuffle_epi8(
              a1_x128, *(__m128i *)(HighbdEvenOddMaskx[base_shift] + 16));
          mask = _mm_cmpgt_epi8(*(__m128i *)HighbdEvenOddMaskx[base_shift],
                                _mm_set1_epi8(15));
          a0_x128 = _mm_blendv_epi8(atmp0, atmp1, mask);
          mask = _mm_cmpgt_epi8(*(__m128i *)(HighbdEvenOddMaskx[base_shift] + 16),
                                _mm_set1_epi8(15));
          a1_x128 = _mm_blendv_epi8(atmp2, atmp3, mask);
          shift = _mm256_srli_epi32(
              _mm256_and_si256(
                  _mm256_slli_epi32(
                      _mm256_setr_epi32(-y * dx, (1 << 6) - y * dx,
                                        (2 << 6) - y * dx, (3 << 6) - y * dx,
                                        (4 << 6) - y * dx, (5 << 6) - y * dx,
                                        (6 << 6) - y * dx, (7 << 6) - y * dx),
                      upsample_above),
                  c3f),
              1);
        } else {
          a1_x128 = _mm_loadu_si128((__m128i *)(above + base_x + 1 + base_shift));
          a0_x128 =
              _mm_shuffle_epi8(a0_x128, *(__m128i *)HighbdLoadMaskx[base_shift]);
          a1_x128 =
              _mm_shuffle_epi8(a1_x128, *(__m128i *)HighbdLoadMaskx[base_shift]);
  
          shift = _mm256_srli_epi32(
              _mm256_and_si256(
                  _mm256_setr_epi32(-y * dx, (1 << 6) - y * dx, (2 << 6) - y * dx,
                                    (3 << 6) - y * dx, (4 << 6) - y * dx,
                                    (5 << 6) - y * dx, (6 << 6) - y * dx,
                                    (7 << 6) - y * dx),
                  c3f),
              1);
        }
        a0_x = _mm256_cvtepu16_epi32(a0_x128);
        a1_x = _mm256_cvtepu16_epi32(a1_x128);
  
        diff = _mm256_sub_epi32(a1_x, a0_x);  // a[x+1] - a[x]
        a32 = _mm256_slli_epi32(a0_x, 5);     // a[x] * 32
        a32 = _mm256_add_epi32(a32, a16);     // a[x] * 32 + 16
  
        b = _mm256_mullo_epi32(diff, shift);
        res = _mm256_add_epi32(a32, b);
        res = _mm256_srli_epi32(res, 5);
  
        resx = _mm256_castsi256_si128(_mm256_packus_epi32(
            res, _mm256_castsi128_si256(_mm256_extracti128_si256(res, 1))));
      }
      // y calc
      if (base_x < min_base_x) {
        DECLARE_ALIGNED(32, int, base_y_c[8]);
        __m256i r6, c256, dy256, y_c256, base_y_c256, mask256;
        r6 = _mm256_set1_epi32(r << 6);
        dy256 = _mm256_set1_epi32(dy);
        c256 = _mm256_setr_epi32(1, 2, 3, 4, 5, 6, 7, 8);
        y_c256 = _mm256_sub_epi32(r6, _mm256_mullo_epi32(c256, dy256));
        base_y_c256 = _mm256_srai_epi32(y_c256, frac_bits_y);
        mask256 = _mm256_cmpgt_epi32(min_base_y256, base_y_c256);
        base_y_c256 = _mm256_andnot_si256(mask256, base_y_c256);
        _mm256_store_si256((__m256i *)base_y_c, base_y_c256);
  
        a0_y = _mm256_cvtepu16_epi32(_mm_setr_epi16(
            left[base_y_c[0]], left[base_y_c[1]], left[base_y_c[2]],
            left[base_y_c[3]], left[base_y_c[4]], left[base_y_c[5]],
            left[base_y_c[6]], left[base_y_c[7]]));
        a1_y = _mm256_cvtepu16_epi32(_mm_setr_epi16(
            left[base_y_c[0] + 1], left[base_y_c[1] + 1], left[base_y_c[2] + 1],
            left[base_y_c[3] + 1], left[base_y_c[4] + 1], left[base_y_c[5] + 1],
            left[base_y_c[6] + 1], left[base_y_c[7] + 1]));
  
        if (upsample_left) {
          shift = _mm256_srli_epi32(
              _mm256_and_si256(_mm256_slli_epi32((y_c256), upsample_left), c3f),
              1);
        } else {
          shift = _mm256_srli_epi32(_mm256_and_si256(y_c256, c3f), 1);
        }
        diff = _mm256_sub_epi32(a1_y, a0_y);  // a[x+1] - a[x]
        a32 = _mm256_slli_epi32(a0_y, 5);     // a[x] * 32
        a32 = _mm256_add_epi32(a32, a16);     // a[x] * 32 + 16
  
        b = _mm256_mullo_epi32(diff, shift);
        res = _mm256_add_epi32(a32, b);
        res = _mm256_srli_epi32(res, 5);
  
        resy = _mm256_castsi256_si128(_mm256_packus_epi32(
            res, _mm256_castsi128_si256(_mm256_extracti128_si256(res, 1))));
      } else {
        resy = resx;
      }
      resxy =
          _mm_blendv_epi8(resx, resy, *(__m128i *)HighbdBaseMask[base_min_diff]);
      _mm_storeu_si128((__m128i *)(dst), resxy);
      dst += stride;
    }
  }
  
  static void highbd_dr_prediction_z2_Nx8_avx2(
      int N, uint16_t *dst, ptrdiff_t stride, const uint16_t *above,
      const uint16_t *left, int upsample_above, int upsample_left, int dx,
      int dy) {
    const int min_base_x = -(1 << upsample_above);
    const int min_base_y = -(1 << upsample_left);
    const int frac_bits_x = 6 - upsample_above;
    const int frac_bits_y = 6 - upsample_left;
  
    // pre-filter above pixels
    // store in temp buffers:
    //   above[x] * 32 + 16
    //   above[x+1] - above[x]
    // final pixels will be calculated as:
    //   (above[x] * 32 + 16 + (above[x+1] - above[x]) * shift) >> 5
    __m128i c3f, min_base_y128;
    __m256i a0_x, a1_x, diff, a32, a16;
    __m128i a0_x128, a1_x128;
  
    a16 = _mm256_set1_epi16(16);
    c3f = _mm_set1_epi16(0x3f);
    min_base_y128 = _mm_set1_epi16(min_base_y);
  
    for (int r = 0; r < N; r++) {
      __m256i b, res, shift;
      __m128i resx, resy, resxy;
      int y = r + 1;
      int base_x = (-y * dx) >> frac_bits_x;
      int base_shift = 0;
      if (base_x < (min_base_x - 1)) {
        base_shift = (min_base_x - base_x - 1) >> upsample_above;
      }
      int base_min_diff =
          (min_base_x - base_x + upsample_above) >> upsample_above;
      if (base_min_diff > 8) {
        base_min_diff = 8;
      } else {
        if (base_min_diff < 0) base_min_diff = 0;
      }
  
      if (base_shift > 7) {
        a0_x = _mm256_setzero_si256();
        a1_x = _mm256_setzero_si256();
        shift = _mm256_setzero_si256();
      } else {
        a0_x128 = _mm_loadu_si128((__m128i *)(above + base_x + base_shift));
        if (upsample_above) {
          __m128i mask, atmp0, atmp1, atmp2, atmp3;
          a1_x128 = _mm_loadu_si128((__m128i *)(above + base_x + 8 + base_shift));
          atmp0 = _mm_shuffle_epi8(a0_x128,
                                   *(__m128i *)HighbdEvenOddMaskx[base_shift]);
          atmp1 = _mm_shuffle_epi8(a1_x128,
                                   *(__m128i *)HighbdEvenOddMaskx[base_shift]);
          atmp2 = _mm_shuffle_epi8(
              a0_x128, *(__m128i *)(HighbdEvenOddMaskx[base_shift] + 16));
          atmp3 = _mm_shuffle_epi8(
              a1_x128, *(__m128i *)(HighbdEvenOddMaskx[base_shift] + 16));
          mask = _mm_cmpgt_epi8(*(__m128i *)HighbdEvenOddMaskx[base_shift],
                                _mm_set1_epi8(15));
          a0_x128 = _mm_blendv_epi8(atmp0, atmp1, mask);
          mask = _mm_cmpgt_epi8(*(__m128i *)(HighbdEvenOddMaskx[base_shift] + 16),
                                _mm_set1_epi8(15));
          a1_x128 = _mm_blendv_epi8(atmp2, atmp3, mask);
  
          shift = _mm256_castsi128_si256(_mm_srli_epi16(
              _mm_and_si128(
                  _mm_slli_epi16(
                      _mm_setr_epi16(-y * dx, (1 << 6) - y * dx,
                                     (2 << 6) - y * dx, (3 << 6) - y * dx,
                                     (4 << 6) - y * dx, (5 << 6) - y * dx,
                                     (6 << 6) - y * dx, (7 << 6) - y * dx),
                      upsample_above),
                  c3f),
              1));
        } else {
          a1_x128 = _mm_loadu_si128((__m128i *)(above + base_x + 1 + base_shift));
          a0_x128 =
              _mm_shuffle_epi8(a0_x128, *(__m128i *)HighbdLoadMaskx[base_shift]);
          a1_x128 =
              _mm_shuffle_epi8(a1_x128, *(__m128i *)HighbdLoadMaskx[base_shift]);
  
          shift = _mm256_castsi128_si256(_mm_srli_epi16(
              _mm_and_si128(_mm_setr_epi16(-y * dx, (1 << 6) - y * dx,
                                           (2 << 6) - y * dx, (3 << 6) - y * dx,
                                           (4 << 6) - y * dx, (5 << 6) - y * dx,
                                           (6 << 6) - y * dx, (7 << 6) - y * dx),
                            c3f),
              1));
        }
        a0_x = _mm256_castsi128_si256(a0_x128);
        a1_x = _mm256_castsi128_si256(a1_x128);
      }
  
      // y calc
      __m128i a0_y, a1_y, shifty;
      if (base_x < min_base_x) {
        DECLARE_ALIGNED(32, int16_t, base_y_c[8]);
        __m128i r6, c1234, dy128, y_c128, base_y_c128, mask128;
        r6 = _mm_set1_epi16(r << 6);
        dy128 = _mm_set1_epi16(dy);
        c1234 = _mm_setr_epi16(1, 2, 3, 4, 5, 6, 7, 8);
        y_c128 = _mm_sub_epi16(r6, _mm_mullo_epi16(c1234, dy128));
        base_y_c128 = _mm_srai_epi16(y_c128, frac_bits_y);
        mask128 = _mm_cmpgt_epi16(min_base_y128, base_y_c128);
        base_y_c128 = _mm_andnot_si128(mask128, base_y_c128);
        _mm_store_si128((__m128i *)base_y_c, base_y_c128);
  
        a0_y = _mm_setr_epi16(left[base_y_c[0]], left[base_y_c[1]],
                              left[base_y_c[2]], left[base_y_c[3]],
                              left[base_y_c[4]], left[base_y_c[5]],
                              left[base_y_c[6]], left[base_y_c[7]]);
        a1_y = _mm_setr_epi16(left[base_y_c[0] + 1], left[base_y_c[1] + 1],
                              left[base_y_c[2] + 1], left[base_y_c[3] + 1],
                              left[base_y_c[4] + 1], left[base_y_c[5] + 1],
                              left[base_y_c[6] + 1], left[base_y_c[7] + 1]);
  
        if (upsample_left) {
          shifty = _mm_srli_epi16(
              _mm_and_si128(_mm_slli_epi16((y_c128), upsample_left), c3f), 1);
        } else {
          shifty = _mm_srli_epi16(_mm_and_si128(y_c128, c3f), 1);
        }
        a0_x = _mm256_inserti128_si256(a0_x, a0_y, 1);
        a1_x = _mm256_inserti128_si256(a1_x, a1_y, 1);
        shift = _mm256_inserti128_si256(shift, shifty, 1);
      }
  
      diff = _mm256_sub_epi16(a1_x, a0_x);  // a[x+1] - a[x]
      a32 = _mm256_slli_epi16(a0_x, 5);     // a[x] * 32
      a32 = _mm256_add_epi16(a32, a16);     // a[x] * 32 + 16
  
      b = _mm256_mullo_epi16(diff, shift);
      res = _mm256_add_epi16(a32, b);
      res = _mm256_srli_epi16(res, 5);
  
      resx = _mm256_castsi256_si128(res);
      resy = _mm256_extracti128_si256(res, 1);
  
      resxy =
          _mm_blendv_epi8(resx, resy, *(__m128i *)HighbdBaseMask[base_min_diff]);
      _mm_storeu_si128((__m128i *)(dst), resxy);
      dst += stride;
    }
  }
  
  static void highbd_dr_prediction_32bit_z2_HxW_avx2(
      int H, int W, uint16_t *dst, ptrdiff_t stride, const uint16_t *above,
      const uint16_t *left, int upsample_above, int upsample_left, int dx,
      int dy) {
    // here upsample_above and upsample_left are 0 by design of
    // av1_use_intra_edge_upsample
    const int min_base_x = -1;
    const int min_base_y = -1;
    (void)upsample_above;
    (void)upsample_left;
    const int frac_bits_x = 6;
    const int frac_bits_y = 6;
  
    // pre-filter above pixels
    // store in temp buffers:
    //   above[x] * 32 + 16
    //   above[x+1] - above[x]
    // final pixels will be calculated as:
    //   (above[x] * 32 + 16 + (above[x+1] - above[x]) * shift) >> 5
    __m256i a0_x, a1_x, a0_y, a1_y, a32, a0_1_x, a1_1_x, a16, c1;
    __m256i diff, min_base_y256, c3f, dy256, c1234, c0123, c8;
    __m128i a0_x128, a1_x128, a0_1_x128, a1_1_x128;
    DECLARE_ALIGNED(32, int, base_y_c[16]);
  
    a16 = _mm256_set1_epi32(16);
    c1 = _mm256_srli_epi32(a16, 4);
    c8 = _mm256_srli_epi32(a16, 1);
    min_base_y256 = _mm256_set1_epi16(min_base_y);
    c3f = _mm256_set1_epi32(0x3f);
    dy256 = _mm256_set1_epi32(dy);
    c0123 = _mm256_setr_epi32(0, 1, 2, 3, 4, 5, 6, 7);
    c1234 = _mm256_add_epi32(c0123, c1);
  
    for (int r = 0; r < H; r++) {
      __m256i b, res, shift, ydx;
      __m256i resx[2], resy[2];
      __m256i resxy, j256, r6;
      for (int j = 0; j < W; j += 16) {
        j256 = _mm256_set1_epi32(j);
        int y = r + 1;
        ydx = _mm256_set1_epi32(y * dx);
  
        int base_x = (-y * dx) >> frac_bits_x;
        int base_shift = 0;
        if ((base_x + j) < (min_base_x - 1)) {
          base_shift = (min_base_x - (base_x + j) - 1);
        }
        int base_min_diff = (min_base_x - base_x - j);
        if (base_min_diff > 16) {
          base_min_diff = 16;
        } else {
          if (base_min_diff < 0) base_min_diff = 0;
        }
  
        if (base_shift > 7) {
          resx[0] = _mm256_setzero_si256();
        } else {
          a0_x128 = _mm_loadu_si128((__m128i *)(above + base_x + base_shift + j));
          a1_x128 =
              _mm_loadu_si128((__m128i *)(above + base_x + base_shift + 1 + j));
          a0_x128 =
              _mm_shuffle_epi8(a0_x128, *(__m128i *)HighbdLoadMaskx[base_shift]);
          a1_x128 =
              _mm_shuffle_epi8(a1_x128, *(__m128i *)HighbdLoadMaskx[base_shift]);
  
          a0_x = _mm256_cvtepu16_epi32(a0_x128);
          a1_x = _mm256_cvtepu16_epi32(a1_x128);
  
          r6 = _mm256_slli_epi32(_mm256_add_epi32(c0123, j256), 6);
          shift = _mm256_srli_epi32(
              _mm256_and_si256(_mm256_sub_epi32(r6, ydx), c3f), 1);
  
          diff = _mm256_sub_epi32(a1_x, a0_x);  // a[x+1] - a[x]
          a32 = _mm256_slli_epi32(a0_x, 5);     // a[x] * 32
          a32 = _mm256_add_epi32(a32, a16);     // a[x] * 32 + 16
  
          b = _mm256_mullo_epi32(diff, shift);
          res = _mm256_add_epi32(a32, b);
          res = _mm256_srli_epi32(res, 5);
  
          resx[0] = _mm256_packus_epi32(
              res, _mm256_castsi128_si256(_mm256_extracti128_si256(res, 1)));
        }
        int base_shift8 = 0;
        if ((base_x + j + 8) < (min_base_x - 1)) {
          base_shift8 = (min_base_x - (base_x + j + 8) - 1);
        }
        if (base_shift8 > 7) {
          resx[1] = _mm256_setzero_si256();
        } else {
          a0_1_x128 =
              _mm_loadu_si128((__m128i *)(above + base_x + base_shift8 + 8 + j));
          a1_1_x128 =
              _mm_loadu_si128((__m128i *)(above + base_x + base_shift8 + 9 + j));
          a0_1_x128 = _mm_shuffle_epi8(a0_1_x128,
                                       *(__m128i *)HighbdLoadMaskx[base_shift8]);
          a1_1_x128 = _mm_shuffle_epi8(a1_1_x128,
                                       *(__m128i *)HighbdLoadMaskx[base_shift8]);
  
          a0_1_x = _mm256_cvtepu16_epi32(a0_1_x128);
          a1_1_x = _mm256_cvtepu16_epi32(a1_1_x128);
  
          r6 = _mm256_slli_epi32(
              _mm256_add_epi32(c0123, _mm256_add_epi32(j256, c8)), 6);
          shift = _mm256_srli_epi32(
              _mm256_and_si256(_mm256_sub_epi32(r6, ydx), c3f), 1);
  
          diff = _mm256_sub_epi32(a1_1_x, a0_1_x);  // a[x+1] - a[x]
          a32 = _mm256_slli_epi32(a0_1_x, 5);       // a[x] * 32
          a32 = _mm256_add_epi32(a32, a16);         // a[x] * 32 + 16
          b = _mm256_mullo_epi32(diff, shift);
  
          resx[1] = _mm256_add_epi32(a32, b);
          resx[1] = _mm256_srli_epi32(resx[1], 5);
          resx[1] = _mm256_packus_epi32(
              resx[1],
              _mm256_castsi128_si256(_mm256_extracti128_si256(resx[1], 1)));
        }
        resx[0] =
            _mm256_inserti128_si256(resx[0], _mm256_castsi256_si128(resx[1]),
                                    1);  // 16 16bit values
  
        // y calc
        resy[0] = _mm256_setzero_si256();
        if ((base_x < min_base_x)) {
          __m256i c256, y_c256, y_c_1_256, base_y_c256, mask256;
          r6 = _mm256_set1_epi32(r << 6);
          c256 = _mm256_add_epi32(j256, c1234);
          y_c256 = _mm256_sub_epi32(r6, _mm256_mullo_epi32(c256, dy256));
          base_y_c256 = _mm256_srai_epi32(y_c256, frac_bits_y);
          mask256 = _mm256_cmpgt_epi32(min_base_y256, base_y_c256);
          base_y_c256 = _mm256_andnot_si256(mask256, base_y_c256);
          _mm256_store_si256((__m256i *)base_y_c, base_y_c256);
          c256 = _mm256_add_epi32(c256, c8);
          y_c_1_256 = _mm256_sub_epi32(r6, _mm256_mullo_epi32(c256, dy256));
          base_y_c256 = _mm256_srai_epi32(y_c_1_256, frac_bits_y);
          mask256 = _mm256_cmpgt_epi32(min_base_y256, base_y_c256);
          base_y_c256 = _mm256_andnot_si256(mask256, base_y_c256);
          _mm256_store_si256((__m256i *)(base_y_c + 8), base_y_c256);
  
          a0_y = _mm256_cvtepu16_epi32(_mm_setr_epi16(
              left[base_y_c[0]], left[base_y_c[1]], left[base_y_c[2]],
              left[base_y_c[3]], left[base_y_c[4]], left[base_y_c[5]],
              left[base_y_c[6]], left[base_y_c[7]]));
          a1_y = _mm256_cvtepu16_epi32(_mm_setr_epi16(
              left[base_y_c[0] + 1], left[base_y_c[1] + 1], left[base_y_c[2] + 1],
              left[base_y_c[3] + 1], left[base_y_c[4] + 1], left[base_y_c[5] + 1],
              left[base_y_c[6] + 1], left[base_y_c[7] + 1]));
  
          shift = _mm256_srli_epi32(_mm256_and_si256(y_c256, c3f), 1);
  
          diff = _mm256_sub_epi32(a1_y, a0_y);  // a[x+1] - a[x]
          a32 = _mm256_slli_epi32(a0_y, 5);     // a[x] * 32
          a32 = _mm256_add_epi32(a32, a16);     // a[x] * 32 + 16
  
          b = _mm256_mullo_epi32(diff, shift);
          res = _mm256_add_epi32(a32, b);
          res = _mm256_srli_epi32(res, 5);
  
          resy[0] = _mm256_packus_epi32(
              res, _mm256_castsi128_si256(_mm256_extracti128_si256(res, 1)));
  
          a0_y = _mm256_cvtepu16_epi32(_mm_setr_epi16(
              left[base_y_c[8]], left[base_y_c[9]], left[base_y_c[10]],
              left[base_y_c[11]], left[base_y_c[12]], left[base_y_c[13]],
              left[base_y_c[14]], left[base_y_c[15]]));
          a1_y = _mm256_cvtepu16_epi32(
              _mm_setr_epi16(left[base_y_c[8] + 1], left[base_y_c[9] + 1],
                             left[base_y_c[10] + 1], left[base_y_c[11] + 1],
                             left[base_y_c[12] + 1], left[base_y_c[13] + 1],
                             left[base_y_c[14] + 1], left[base_y_c[15] + 1]));
          shift = _mm256_srli_epi32(_mm256_and_si256(y_c_1_256, c3f), 1);
  
          diff = _mm256_sub_epi32(a1_y, a0_y);  // a[x+1] - a[x]
          a32 = _mm256_slli_epi32(a0_y, 5);     // a[x] * 32
          a32 = _mm256_add_epi32(a32, a16);     // a[x] * 32 + 16
  
          b = _mm256_mullo_epi32(diff, shift);
          res = _mm256_add_epi32(a32, b);
          res = _mm256_srli_epi32(res, 5);
  
          resy[1] = _mm256_packus_epi32(
              res, _mm256_castsi128_si256(_mm256_extracti128_si256(res, 1)));
  
          resy[0] =
              _mm256_inserti128_si256(resy[0], _mm256_castsi256_si128(resy[1]),
                                      1);  // 16 16bit values
        }
  
        resxy = _mm256_blendv_epi8(resx[0], resy[0],
                                   *(__m256i *)HighbdBaseMask[base_min_diff]);
        _mm256_storeu_si256((__m256i *)(dst + j), resxy);
      }  // for j
      dst += stride;
    }
  }
  
  static void highbd_dr_prediction_z2_HxW_avx2(
      int H, int W, uint16_t *dst, ptrdiff_t stride, const uint16_t *above,
      const uint16_t *left, int upsample_above, int upsample_left, int dx,
      int dy) {
    // here upsample_above and upsample_left are 0 by design of
    // av1_use_intra_edge_upsample
    const int min_base_x = -1;
    const int min_base_y = -1;
    (void)upsample_above;
    (void)upsample_left;
    const int frac_bits_x = 6;
    const int frac_bits_y = 6;
  
    // pre-filter above pixels
    // store in temp buffers:
    //   above[x] * 32 + 16
    //   above[x+1] - above[x]
    // final pixels will be calculated as:
    //   (above[x] * 32 + 16 + (above[x+1] - above[x]) * shift) >> 5
    __m256i a0_x, a1_x, a32, a16, c3f, c1;
    __m256i diff, min_base_y256, dy256, c1234, c0123;
    DECLARE_ALIGNED(32, int16_t, base_y_c[16]);
  
    a16 = _mm256_set1_epi16(16);
    c1 = _mm256_srli_epi16(a16, 4);
    min_base_y256 = _mm256_set1_epi16(min_base_y);
    c3f = _mm256_set1_epi16(0x3f);
    dy256 = _mm256_set1_epi16(dy);
    c0123 =
        _mm256_setr_epi16(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15);
    c1234 = _mm256_add_epi16(c0123, c1);
  
    for (int r = 0; r < H; r++) {
      __m256i b, res, shift;
      __m256i resx, resy, ydx;
      __m256i resxy, j256, r6;
      __m128i a0_x128, a1_x128, a0_1_x128, a1_1_x128;
      int y = r + 1;
      ydx = _mm256_set1_epi16(y * dx);
  
      for (int j = 0; j < W; j += 16) {
        j256 = _mm256_set1_epi16(j);
        int base_x = (-y * dx) >> frac_bits_x;
        int base_shift = 0;
        if ((base_x + j) < (min_base_x - 1)) {
          base_shift = (min_base_x - (base_x + j) - 1);
        }
        int base_min_diff = (min_base_x - base_x - j);
        if (base_min_diff > 16) {
          base_min_diff = 16;
        } else {
          if (base_min_diff < 0) base_min_diff = 0;
        }
  
        if (base_shift < 8) {
          a0_x128 = _mm_loadu_si128((__m128i *)(above + base_x + base_shift + j));
          a1_x128 =
              _mm_loadu_si128((__m128i *)(above + base_x + base_shift + 1 + j));
          a0_x128 =
              _mm_shuffle_epi8(a0_x128, *(__m128i *)HighbdLoadMaskx[base_shift]);
          a1_x128 =
              _mm_shuffle_epi8(a1_x128, *(__m128i *)HighbdLoadMaskx[base_shift]);
  
          a0_x = _mm256_castsi128_si256(a0_x128);
          a1_x = _mm256_castsi128_si256(a1_x128);
        } else {
          a0_x = _mm256_setzero_si256();
          a1_x = _mm256_setzero_si256();
        }
  
        int base_shift1 = 0;
        if (base_shift > 8) {
          base_shift1 = base_shift - 8;
        }
        if (base_shift1 < 8) {
          a0_1_x128 =
              _mm_loadu_si128((__m128i *)(above + base_x + base_shift1 + 8 + j));
          a1_1_x128 =
              _mm_loadu_si128((__m128i *)(above + base_x + base_shift1 + 9 + j));
          a0_1_x128 = _mm_shuffle_epi8(a0_1_x128,
                                       *(__m128i *)HighbdLoadMaskx[base_shift1]);
          a1_1_x128 = _mm_shuffle_epi8(a1_1_x128,
                                       *(__m128i *)HighbdLoadMaskx[base_shift1]);
  
          a0_x = _mm256_inserti128_si256(a0_x, a0_1_x128, 1);
          a1_x = _mm256_inserti128_si256(a1_x, a1_1_x128, 1);
        }
        r6 = _mm256_slli_epi16(_mm256_add_epi16(c0123, j256), 6);
        shift = _mm256_srli_epi16(
            _mm256_and_si256(_mm256_sub_epi16(r6, ydx), c3f), 1);
  
        diff = _mm256_sub_epi16(a1_x, a0_x);  // a[x+1] - a[x]
        a32 = _mm256_slli_epi16(a0_x, 5);     // a[x] * 32
        a32 = _mm256_add_epi16(a32, a16);     // a[x] * 32 + 16
  
        b = _mm256_mullo_epi16(diff, shift);
        res = _mm256_add_epi16(a32, b);
        resx = _mm256_srli_epi16(res, 5);  // 16 16-bit values
  
        // y calc
        resy = _mm256_setzero_si256();
        __m256i a0_y, a1_y, shifty;
        if ((base_x < min_base_x)) {
          __m256i c256, y_c256, base_y_c256, mask256, mul16;
          r6 = _mm256_set1_epi16(r << 6);
          c256 = _mm256_add_epi16(j256, c1234);
          mul16 = _mm256_min_epu16(_mm256_mullo_epi16(c256, dy256),
                                   _mm256_srli_epi16(min_base_y256, 1));
          y_c256 = _mm256_sub_epi16(r6, mul16);
          base_y_c256 = _mm256_srai_epi16(y_c256, frac_bits_y);
          mask256 = _mm256_cmpgt_epi16(min_base_y256, base_y_c256);
          base_y_c256 = _mm256_andnot_si256(mask256, base_y_c256);
          _mm256_store_si256((__m256i *)base_y_c, base_y_c256);
  
          a0_y = _mm256_setr_epi16(
              left[base_y_c[0]], left[base_y_c[1]], left[base_y_c[2]],
              left[base_y_c[3]], left[base_y_c[4]], left[base_y_c[5]],
              left[base_y_c[6]], left[base_y_c[7]], left[base_y_c[8]],
              left[base_y_c[9]], left[base_y_c[10]], left[base_y_c[11]],
              left[base_y_c[12]], left[base_y_c[13]], left[base_y_c[14]],
              left[base_y_c[15]]);
          base_y_c256 = _mm256_add_epi16(base_y_c256, c1);
          _mm256_store_si256((__m256i *)base_y_c, base_y_c256);
  
          a1_y = _mm256_setr_epi16(
              left[base_y_c[0]], left[base_y_c[1]], left[base_y_c[2]],
              left[base_y_c[3]], left[base_y_c[4]], left[base_y_c[5]],
              left[base_y_c[6]], left[base_y_c[7]], left[base_y_c[8]],
              left[base_y_c[9]], left[base_y_c[10]], left[base_y_c[11]],
              left[base_y_c[12]], left[base_y_c[13]], left[base_y_c[14]],
              left[base_y_c[15]]);
  
          shifty = _mm256_srli_epi16(_mm256_and_si256(y_c256, c3f), 1);
  
          diff = _mm256_sub_epi16(a1_y, a0_y);  // a[x+1] - a[x]
          a32 = _mm256_slli_epi16(a0_y, 5);     // a[x] * 32
          a32 = _mm256_add_epi16(a32, a16);     // a[x] * 32 + 16
  
          b = _mm256_mullo_epi16(diff, shifty);
          res = _mm256_add_epi16(a32, b);
          resy = _mm256_srli_epi16(res, 5);
        }
  
        resxy = _mm256_blendv_epi8(resx, resy,
                                   *(__m256i *)HighbdBaseMask[base_min_diff]);
        _mm256_storeu_si256((__m256i *)(dst + j), resxy);
      }  // for j
      dst += stride;
    }
  }
  
  // Directional prediction, zone 2: 90 < angle < 180
  void av1_highbd_dr_prediction_z2_avx2(uint16_t *dst, ptrdiff_t stride, int bw,
                                        int bh, const uint16_t *above,
                                        const uint16_t *left, int upsample_above,
                                        int upsample_left, int dx, int dy,
                                        int bd) {
    (void)bd;
    assert(dx > 0);
    assert(dy > 0);
    switch (bw) {
      case 4:
        if (bd < 12) {
          highbd_dr_prediction_z2_Nx4_avx2(bh, dst, stride, above, left,
                                           upsample_above, upsample_left, dx, dy);
        } else {
          highbd_dr_prediction_32bit_z2_Nx4_avx2(bh, dst, stride, above, left,
                                                 upsample_above, upsample_left,
                                                 dx, dy);
        }
        break;
      case 8:
        if (bd < 12) {
          highbd_dr_prediction_z2_Nx8_avx2(bh, dst, stride, above, left,
                                           upsample_above, upsample_left, dx, dy);
        } else {
          highbd_dr_prediction_32bit_z2_Nx8_avx2(bh, dst, stride, above, left,
                                                 upsample_above, upsample_left,
                                                 dx, dy);
        }
        break;
      default:
        if (bd < 12) {
          highbd_dr_prediction_z2_HxW_avx2(bh, bw, dst, stride, above, left,
                                           upsample_above, upsample_left, dx, dy);
        } else {
          highbd_dr_prediction_32bit_z2_HxW_avx2(bh, bw, dst, stride, above, left,
                                                 upsample_above, upsample_left,
                                                 dx, dy);
        }
        break;
    }
  }
  
  //  Directional prediction, zone 3 functions
  static void highbd_dr_prediction_z3_4x4_avx2(uint16_t *dst, ptrdiff_t stride,
                                               const uint16_t *left,
                                               int upsample_left, int dy,
                                               int bd) {
    __m128i dstvec[4], d[4];
    if (bd < 12) {
      highbd_dr_prediction_z1_4xN_internal_avx2(4, dstvec, left, upsample_left,
                                                dy);
    } else {
      highbd_dr_prediction_32bit_z1_4xN_internal_avx2(4, dstvec, left,
                                                      upsample_left, dy);
    }
    highbd_transpose4x8_8x4_low_sse2(&dstvec[0], &dstvec[1], &dstvec[2],
                                     &dstvec[3], &d[0], &d[1], &d[2], &d[3]);
    _mm_storel_epi64((__m128i *)(dst + 0 * stride), d[0]);
    _mm_storel_epi64((__m128i *)(dst + 1 * stride), d[1]);
    _mm_storel_epi64((__m128i *)(dst + 2 * stride), d[2]);
    _mm_storel_epi64((__m128i *)(dst + 3 * stride), d[3]);
    return;
  }
  
  static void highbd_dr_prediction_z3_8x8_avx2(uint16_t *dst, ptrdiff_t stride,
                                               const uint16_t *left,
                                               int upsample_left, int dy,
                                               int bd) {
    __m128i dstvec[8], d[8];
    if (bd < 12) {
      highbd_dr_prediction_z1_8xN_internal_avx2(8, dstvec, left, upsample_left,
                                                dy);
    } else {
      highbd_dr_prediction_32bit_z1_8xN_internal_avx2(8, dstvec, left,
                                                      upsample_left, dy);
    }
    highbd_transpose8x8_sse2(&dstvec[0], &dstvec[1], &dstvec[2], &dstvec[3],
                             &dstvec[4], &dstvec[5], &dstvec[6], &dstvec[7],
                             &d[0], &d[1], &d[2], &d[3], &d[4], &d[5], &d[6],
                             &d[7]);
    for (int i = 0; i < 8; i++) {
      _mm_storeu_si128((__m128i *)(dst + i * stride), d[i]);
    }
  }
  
  static void highbd_dr_prediction_z3_4x8_avx2(uint16_t *dst, ptrdiff_t stride,
                                               const uint16_t *left,
                                               int upsample_left, int dy,
                                               int bd) {
    __m128i dstvec[4], d[8];
    if (bd < 12) {
      highbd_dr_prediction_z1_8xN_internal_avx2(4, dstvec, left, upsample_left,
                                                dy);
    } else {
      highbd_dr_prediction_32bit_z1_8xN_internal_avx2(4, dstvec, left,
                                                      upsample_left, dy);
    }
  
    highbd_transpose4x8_8x4_sse2(&dstvec[0], &dstvec[1], &dstvec[2], &dstvec[3],
                                 &d[0], &d[1], &d[2], &d[3], &d[4], &d[5], &d[6],
                                 &d[7]);
    for (int i = 0; i < 8; i++) {
      _mm_storel_epi64((__m128i *)(dst + i * stride), d[i]);
    }
  }
  
  static void highbd_dr_prediction_z3_8x4_avx2(uint16_t *dst, ptrdiff_t stride,
                                               const uint16_t *left,
                                               int upsample_left, int dy,
                                               int bd) {
    __m128i dstvec[8], d[4];
    if (bd < 12) {
      highbd_dr_prediction_z1_4xN_internal_avx2(8, dstvec, left, upsample_left,
                                                dy);
    } else {
      highbd_dr_prediction_32bit_z1_4xN_internal_avx2(8, dstvec, left,
                                                      upsample_left, dy);
    }
  
    highbd_transpose8x8_low_sse2(&dstvec[0], &dstvec[1], &dstvec[2], &dstvec[3],
                                 &dstvec[4], &dstvec[5], &dstvec[6], &dstvec[7],
                                 &d[0], &d[1], &d[2], &d[3]);
    _mm_storeu_si128((__m128i *)(dst + 0 * stride), d[0]);
    _mm_storeu_si128((__m128i *)(dst + 1 * stride), d[1]);
    _mm_storeu_si128((__m128i *)(dst + 2 * stride), d[2]);
    _mm_storeu_si128((__m128i *)(dst + 3 * stride), d[3]);
  }
  
  static void highbd_dr_prediction_z3_8x16_avx2(uint16_t *dst, ptrdiff_t stride,
                                                const uint16_t *left,
                                                int upsample_left, int dy,
                                                int bd) {
    __m256i dstvec[8], d[8];
    if (bd < 12) {
      highbd_dr_prediction_z1_16xN_internal_avx2(8, dstvec, left, upsample_left,
                                                 dy);
    } else {
      highbd_dr_prediction_32bit_z1_16xN_internal_avx2(8, dstvec, left,
                                                       upsample_left, dy);
    }
    highbd_transpose8x16_16x8_avx2(dstvec, d);
    for (int i = 0; i < 8; i++) {
      _mm_storeu_si128((__m128i *)(dst + i * stride),
                       _mm256_castsi256_si128(d[i]));
    }
    for (int i = 8; i < 16; i++) {
      _mm_storeu_si128((__m128i *)(dst + i * stride),
                       _mm256_extracti128_si256(d[i - 8], 1));
    }
  }
  
  static void highbd_dr_prediction_z3_16x8_avx2(uint16_t *dst, ptrdiff_t stride,
                                                const uint16_t *left,
                                                int upsample_left, int dy,
                                                int bd) {
    __m128i dstvec[16], d[16];
    if (bd < 12) {
      highbd_dr_prediction_z1_8xN_internal_avx2(16, dstvec, left, upsample_left,
                                                dy);
    } else {
      highbd_dr_prediction_32bit_z1_8xN_internal_avx2(16, dstvec, left,
                                                      upsample_left, dy);
    }
    for (int i = 0; i < 16; i += 8) {
      highbd_transpose8x8_sse2(&dstvec[0 + i], &dstvec[1 + i], &dstvec[2 + i],
                               &dstvec[3 + i], &dstvec[4 + i], &dstvec[5 + i],
                               &dstvec[6 + i], &dstvec[7 + i], &d[0 + i],
                               &d[1 + i], &d[2 + i], &d[3 + i], &d[4 + i],
                               &d[5 + i], &d[6 + i], &d[7 + i]);
    }
    for (int i = 0; i < 8; i++) {
      _mm_storeu_si128((__m128i *)(dst + i * stride), d[i]);
      _mm_storeu_si128((__m128i *)(dst + i * stride + 8), d[i + 8]);
    }
  }
  
  static void highbd_dr_prediction_z3_4x16_avx2(uint16_t *dst, ptrdiff_t stride,
                                                const uint16_t *left,
                                                int upsample_left, int dy,
                                                int bd) {
    __m256i dstvec[4], d[4], d1;
    if (bd < 12) {
      highbd_dr_prediction_z1_16xN_internal_avx2(4, dstvec, left, upsample_left,
                                                 dy);
    } else {
      highbd_dr_prediction_32bit_z1_16xN_internal_avx2(4, dstvec, left,
                                                       upsample_left, dy);
    }
    highbd_transpose4x16_avx2(dstvec, d);
    for (int i = 0; i < 4; i++) {
      _mm_storel_epi64((__m128i *)(dst + i * stride),
                       _mm256_castsi256_si128(d[i]));
      d1 = _mm256_bsrli_epi128(d[i], 8);
      _mm_storel_epi64((__m128i *)(dst + (i + 4) * stride),
                       _mm256_castsi256_si128(d1));
      _mm_storel_epi64((__m128i *)(dst + (i + 8) * stride),
                       _mm256_extracti128_si256(d[i], 1));
      _mm_storel_epi64((__m128i *)(dst + (i + 12) * stride),
                       _mm256_extracti128_si256(d1, 1));
    }
  }
  
  static void highbd_dr_prediction_z3_16x4_avx2(uint16_t *dst, ptrdiff_t stride,
                                                const uint16_t *left,
                                                int upsample_left, int dy,
                                                int bd) {
    __m128i dstvec[16], d[8];
    if (bd < 12) {
      highbd_dr_prediction_z1_4xN_internal_avx2(16, dstvec, left, upsample_left,
                                                dy);
    } else {
      highbd_dr_prediction_32bit_z1_4xN_internal_avx2(16, dstvec, left,
                                                      upsample_left, dy);
    }
    highbd_transpose16x4_8x8_sse2(dstvec, d);
  
    _mm_storeu_si128((__m128i *)(dst + 0 * stride), d[0]);
    _mm_storeu_si128((__m128i *)(dst + 0 * stride + 8), d[1]);
    _mm_storeu_si128((__m128i *)(dst + 1 * stride), d[2]);
    _mm_storeu_si128((__m128i *)(dst + 1 * stride + 8), d[3]);
    _mm_storeu_si128((__m128i *)(dst + 2 * stride), d[4]);
    _mm_storeu_si128((__m128i *)(dst + 2 * stride + 8), d[5]);
    _mm_storeu_si128((__m128i *)(dst + 3 * stride), d[6]);
    _mm_storeu_si128((__m128i *)(dst + 3 * stride + 8), d[7]);
  }
  
  static void highbd_dr_prediction_z3_8x32_avx2(uint16_t *dst, ptrdiff_t stride,
                                                const uint16_t *left,
                                                int upsample_left, int dy,
                                                int bd) {
    __m256i dstvec[16], d[16];
    if (bd < 12) {
      highbd_dr_prediction_z1_32xN_internal_avx2(8, dstvec, left, upsample_left,
                                                 dy);
    } else {
      highbd_dr_prediction_32bit_z1_32xN_internal_avx2(8, dstvec, left,
                                                       upsample_left, dy);
    }
  
    for (int i = 0; i < 16; i += 8) {
      highbd_transpose8x16_16x8_avx2(dstvec + i, d + i);
    }
  
    for (int i = 0; i < 8; i++) {
      _mm_storeu_si128((__m128i *)(dst + i * stride),
                       _mm256_castsi256_si128(d[i]));
    }
    for (int i = 0; i < 8; i++) {
      _mm_storeu_si128((__m128i *)(dst + (i + 8) * stride),
                       _mm256_extracti128_si256(d[i], 1));
    }
    for (int i = 8; i < 16; i++) {
      _mm_storeu_si128((__m128i *)(dst + (i + 8) * stride),
                       _mm256_castsi256_si128(d[i]));
    }
    for (int i = 8; i < 16; i++) {
      _mm_storeu_si128((__m128i *)(dst + (i + 16) * stride),
                       _mm256_extracti128_si256(d[i], 1));
    }
  }
  
  static void highbd_dr_prediction_z3_32x8_avx2(uint16_t *dst, ptrdiff_t stride,
                                                const uint16_t *left,
                                                int upsample_left, int dy,
                                                int bd) {
    __m128i dstvec[32], d[32];
    if (bd < 12) {
      highbd_dr_prediction_z1_8xN_internal_avx2(32, dstvec, left, upsample_left,
                                                dy);
    } else {
      highbd_dr_prediction_32bit_z1_8xN_internal_avx2(32, dstvec, left,
                                                      upsample_left, dy);
    }
  
    for (int i = 0; i < 32; i += 8) {
      highbd_transpose8x8_sse2(&dstvec[0 + i], &dstvec[1 + i], &dstvec[2 + i],
                               &dstvec[3 + i], &dstvec[4 + i], &dstvec[5 + i],
                               &dstvec[6 + i], &dstvec[7 + i], &d[0 + i],
                               &d[1 + i], &d[2 + i], &d[3 + i], &d[4 + i],
                               &d[5 + i], &d[6 + i], &d[7 + i]);
    }
    for (int i = 0; i < 8; i++) {
      _mm_storeu_si128((__m128i *)(dst + i * stride), d[i]);
      _mm_storeu_si128((__m128i *)(dst + i * stride + 8), d[i + 8]);
      _mm_storeu_si128((__m128i *)(dst + i * stride + 16), d[i + 16]);
      _mm_storeu_si128((__m128i *)(dst + i * stride + 24), d[i + 24]);
    }
  }
  
  static void highbd_dr_prediction_z3_16x16_avx2(uint16_t *dst, ptrdiff_t stride,
                                                 const uint16_t *left,
                                                 int upsample_left, int dy,
                                                 int bd) {
    __m256i dstvec[16], d[16];
    if (bd < 12) {
      highbd_dr_prediction_z1_16xN_internal_avx2(16, dstvec, left, upsample_left,
                                                 dy);
    } else {
      highbd_dr_prediction_32bit_z1_16xN_internal_avx2(16, dstvec, left,
                                                       upsample_left, dy);
    }
  
    highbd_transpose16x16_avx2(dstvec, d);
  
    for (int i = 0; i < 16; i++) {
      _mm256_storeu_si256((__m256i *)(dst + i * stride), d[i]);
    }
  }
  
  static void highbd_dr_prediction_z3_32x32_avx2(uint16_t *dst, ptrdiff_t stride,
                                                 const uint16_t *left,
                                                 int upsample_left, int dy,
                                                 int bd) {
    __m256i dstvec[64], d[16];
    if (bd < 12) {
      highbd_dr_prediction_z1_32xN_internal_avx2(32, dstvec, left, upsample_left,
                                                 dy);
    } else {
      highbd_dr_prediction_32bit_z1_32xN_internal_avx2(32, dstvec, left,
                                                       upsample_left, dy);
    }
    highbd_transpose16x16_avx2(dstvec, d);
    for (int j = 0; j < 16; j++) {
      _mm256_storeu_si256((__m256i *)(dst + j * stride), d[j]);
    }
    highbd_transpose16x16_avx2(dstvec + 16, d);
    for (int j = 0; j < 16; j++) {
      _mm256_storeu_si256((__m256i *)(dst + j * stride + 16), d[j]);
    }
    highbd_transpose16x16_avx2(dstvec + 32, d);
    for (int j = 0; j < 16; j++) {
      _mm256_storeu_si256((__m256i *)(dst + (j + 16) * stride), d[j]);
    }
    highbd_transpose16x16_avx2(dstvec + 48, d);
    for (int j = 0; j < 16; j++) {
      _mm256_storeu_si256((__m256i *)(dst + (j + 16) * stride + 16), d[j]);
    }
  }
  
  static void highbd_dr_prediction_z3_64x64_avx2(uint16_t *dst, ptrdiff_t stride,
                                                 const uint16_t *left,
                                                 int upsample_left, int dy,
                                                 int bd) {
    DECLARE_ALIGNED(16, uint16_t, dstT[64 * 64]);
    if (bd < 12) {
      highbd_dr_prediction_z1_64xN_avx2(64, dstT, 64, left, upsample_left, dy);
    } else {
      highbd_dr_prediction_32bit_z1_64xN_avx2(64, dstT, 64, left, upsample_left,
                                              dy);
    }
    highbd_transpose(dstT, 64, dst, stride, 64, 64);
  }
  
  static void highbd_dr_prediction_z3_16x32_avx2(uint16_t *dst, ptrdiff_t stride,
                                                 const uint16_t *left,
                                                 int upsample_left, int dy,
                                                 int bd) {
    __m256i dstvec[32], d[32];
    if (bd < 12) {
      highbd_dr_prediction_z1_32xN_internal_avx2(16, dstvec, left, upsample_left,
                                                 dy);
    } else {
      highbd_dr_prediction_32bit_z1_32xN_internal_avx2(16, dstvec, left,
                                                       upsample_left, dy);
    }
    for (int i = 0; i < 32; i += 8) {
      highbd_transpose8x16_16x8_avx2(dstvec + i, d + i);
    }
    // store
    for (int j = 0; j < 32; j += 16) {
      for (int i = 0; i < 8; i++) {
        _mm_storeu_si128((__m128i *)(dst + (i + j) * stride),
                         _mm256_castsi256_si128(d[(i + j)]));
      }
      for (int i = 0; i < 8; i++) {
        _mm_storeu_si128((__m128i *)(dst + (i + j) * stride + 8),
                         _mm256_castsi256_si128(d[(i + j) + 8]));
      }
      for (int i = 8; i < 16; i++) {
        _mm256_storeu_si256(
            (__m256i *)(dst + (i + j) * stride),
            _mm256_inserti128_si256(
                d[(i + j)], _mm256_extracti128_si256(d[(i + j) - 8], 1), 0));
      }
    }
  }
  
  static void highbd_dr_prediction_z3_32x16_avx2(uint16_t *dst, ptrdiff_t stride,
                                                 const uint16_t *left,
                                                 int upsample_left, int dy,
                                                 int bd) {
    __m256i dstvec[32], d[16];
    if (bd < 12) {
      highbd_dr_prediction_z1_16xN_internal_avx2(32, dstvec, left, upsample_left,
                                                 dy);
    } else {
      highbd_dr_prediction_32bit_z1_16xN_internal_avx2(32, dstvec, left,
                                                       upsample_left, dy);
    }
    for (int i = 0; i < 32; i += 16) {
      highbd_transpose16x16_avx2((dstvec + i), d);
      for (int j = 0; j < 16; j++) {
        _mm256_storeu_si256((__m256i *)(dst + j * stride + i), d[j]);
      }
    }
  }
  
  static void highbd_dr_prediction_z3_32x64_avx2(uint16_t *dst, ptrdiff_t stride,
                                                 const uint16_t *left,
                                                 int upsample_left, int dy,
                                                 int bd) {
    uint16_t dstT[64 * 32];
    if (bd < 12) {
      highbd_dr_prediction_z1_64xN_avx2(32, dstT, 64, left, upsample_left, dy);
    } else {
      highbd_dr_prediction_32bit_z1_64xN_avx2(32, dstT, 64, left, upsample_left,
                                              dy);
    }
    highbd_transpose(dstT, 64, dst, stride, 32, 64);
  }
  
  static void highbd_dr_prediction_z3_64x32_avx2(uint16_t *dst, ptrdiff_t stride,
                                                 const uint16_t *left,
                                                 int upsample_left, int dy,
                                                 int bd) {
    DECLARE_ALIGNED(16, uint16_t, dstT[32 * 64]);
    highbd_dr_prediction_z1_32xN_avx2(64, dstT, 32, left, upsample_left, dy, bd);
    highbd_transpose(dstT, 32, dst, stride, 64, 32);
    return;
  }
  
  static void highbd_dr_prediction_z3_16x64_avx2(uint16_t *dst, ptrdiff_t stride,
                                                 const uint16_t *left,
                                                 int upsample_left, int dy,
                                                 int bd) {
    DECLARE_ALIGNED(16, uint16_t, dstT[64 * 16]);
    if (bd < 12) {
      highbd_dr_prediction_z1_64xN_avx2(16, dstT, 64, left, upsample_left, dy);
    } else {
      highbd_dr_prediction_32bit_z1_64xN_avx2(16, dstT, 64, left, upsample_left,
                                              dy);
    }
    highbd_transpose(dstT, 64, dst, stride, 16, 64);
  }
  
  static void highbd_dr_prediction_z3_64x16_avx2(uint16_t *dst, ptrdiff_t stride,
                                                 const uint16_t *left,
                                                 int upsample_left, int dy,
                                                 int bd) {
    __m256i dstvec[64], d[16];
    if (bd < 12) {
      highbd_dr_prediction_z1_16xN_internal_avx2(64, dstvec, left, upsample_left,
                                                 dy);
    } else {
      highbd_dr_prediction_32bit_z1_16xN_internal_avx2(64, dstvec, left,
                                                       upsample_left, dy);
    }
    for (int i = 0; i < 64; i += 16) {
      highbd_transpose16x16_avx2((dstvec + i), d);
      for (int j = 0; j < 16; j++) {
        _mm256_storeu_si256((__m256i *)(dst + j * stride + i), d[j]);
      }
    }
  }
  
  void av1_highbd_dr_prediction_z3_avx2(uint16_t *dst, ptrdiff_t stride, int bw,
                                        int bh, const uint16_t *above,
                                        const uint16_t *left, int upsample_left,
                                        int dx, int dy, int bd) {
    (void)above;
    (void)dx;
  
    assert(dx == 1);
    assert(dy > 0);
    if (bw == bh) {
      switch (bw) {
        case 4:
          highbd_dr_prediction_z3_4x4_avx2(dst, stride, left, upsample_left, dy,
                                           bd);
          break;
        case 8:
          highbd_dr_prediction_z3_8x8_avx2(dst, stride, left, upsample_left, dy,
                                           bd);
          break;
        case 16:
          highbd_dr_prediction_z3_16x16_avx2(dst, stride, left, upsample_left, dy,
                                             bd);
          break;
        case 32:
          highbd_dr_prediction_z3_32x32_avx2(dst, stride, left, upsample_left, dy,
                                             bd);
          break;
        case 64:
          highbd_dr_prediction_z3_64x64_avx2(dst, stride, left, upsample_left, dy,
                                             bd);
          break;
      }
    } else {
      if (bw < bh) {
        if (bw + bw == bh) {
          switch (bw) {
            case 4:
              highbd_dr_prediction_z3_4x8_avx2(dst, stride, left, upsample_left,
                                               dy, bd);
              break;
            case 8:
              highbd_dr_prediction_z3_8x16_avx2(dst, stride, left, upsample_left,
                                                dy, bd);
              break;
            case 16:
              highbd_dr_prediction_z3_16x32_avx2(dst, stride, left, upsample_left,
                                                 dy, bd);
              break;
            case 32:
              highbd_dr_prediction_z3_32x64_avx2(dst, stride, left, upsample_left,
                                                 dy, bd);
              break;
          }
        } else {
          switch (bw) {
            case 4:
              highbd_dr_prediction_z3_4x16_avx2(dst, stride, left, upsample_left,
                                                dy, bd);
              break;
            case 8:
              highbd_dr_prediction_z3_8x32_avx2(dst, stride, left, upsample_left,
                                                dy, bd);
              break;
            case 16:
              highbd_dr_prediction_z3_16x64_avx2(dst, stride, left, upsample_left,
                                                 dy, bd);
              break;
          }
        }
      } else {
        if (bh + bh == bw) {
          switch (bh) {
            case 4:
              highbd_dr_prediction_z3_8x4_avx2(dst, stride, left, upsample_left,
                                               dy, bd);
              break;
            case 8:
              highbd_dr_prediction_z3_16x8_avx2(dst, stride, left, upsample_left,
                                                dy, bd);
              break;
            case 16:
              highbd_dr_prediction_z3_32x16_avx2(dst, stride, left, upsample_left,
                                                 dy, bd);
              break;
            case 32:
              highbd_dr_prediction_z3_64x32_avx2(dst, stride, left, upsample_left,
                                                 dy, bd);
              break;
          }
        } else {
          switch (bh) {
            case 4:
              highbd_dr_prediction_z3_16x4_avx2(dst, stride, left, upsample_left,
                                                dy, bd);
              break;
            case 8:
              highbd_dr_prediction_z3_32x8_avx2(dst, stride, left, upsample_left,
                                                dy, bd);
              break;
            case 16:
              highbd_dr_prediction_z3_64x16_avx2(dst, stride, left, upsample_left,
                                                 dy, bd);
              break;
          }
        }
      }
    }
    return;
  }
  
  // Low bit depth functions
  static DECLARE_ALIGNED(32, uint8_t, BaseMask[33][32]) = {
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
    { 0xff, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0,    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
    { 0xff, 0xff, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0,    0,    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
    { 0xff, 0xff, 0xff, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0,    0,    0,    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
    { 0xff, 0xff, 0xff, 0xff, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0,    0,    0,    0,    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0,    0,    0,    0,    0,    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0, 0, 0, 0, 0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, 0, 0, 0, 0, 0, 0,
      0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0, 0, 0, 0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, 0, 0, 0, 0, 0,
      0,    0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0, 0, 0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
      0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
      0,    0,    0,    0,    0,    0,    0,    0,    0,    0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
      0,    0,    0,    0,    0,    0,    0,    0,    0,    0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
      0,    0,    0,    0,    0,    0,    0,    0,    0,    0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0,    0,    0,    0,    0,    0,    0,    0,    0,
      0,    0,    0,    0,    0,    0,    0,    0,    0,    0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0,    0,    0,    0,    0,    0,    0,    0,
      0,    0,    0,    0,    0,    0,    0,    0,    0,    0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0,    0,    0,    0,    0,    0,    0,
      0,    0,    0,    0,    0,    0,    0,    0,    0,    0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0xff, 0,    0,    0,    0,    0,    0,
      0,    0,    0,    0,    0,    0,    0,    0,    0,    0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,    0,    0,    0,    0,
      0,    0,    0,    0,    0,    0,    0,    0,    0,    0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,    0,    0,    0,
      0,    0,    0,    0,    0,    0,    0,    0,    0,    0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,    0,    0,
      0,    0,    0,    0,    0,    0,    0,    0,    0,    0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,    0,
      0,    0,    0,    0,    0,    0,    0,    0,    0,    0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
      0,    0,    0,    0,    0,    0,    0,    0,    0,    0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0,    0,    0,    0,    0,    0,    0,    0,    0,    0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0,    0,    0,    0,    0,    0,    0,    0,    0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0,    0,    0,    0,    0,    0,    0,    0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0,    0,    0,    0,    0,    0,    0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0,    0,    0,    0,    0,    0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0xff, 0,    0,    0,    0,    0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,    0,    0,    0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,    0,    0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,    0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0 },
    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
      0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff },
  };
  
  static DECLARE_ALIGNED(16, uint8_t, LoadMaskx[16][16]) = {
    { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
    { 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 },
    { 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 },
    { 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 },
    { 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 },
    { 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 },
    { 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
    { 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8 },
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7 },
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6 },
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5 },
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4 },
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3 },
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2 },
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
  };
  
  static DECLARE_ALIGNED(16, uint8_t, EvenOddMaskx[8][16]) = {
    { 0, 2, 4, 6, 8, 10, 12, 14, 1, 3, 5, 7, 9, 11, 13, 15 },
    { 0, 1, 3, 5, 7, 9, 11, 13, 0, 2, 4, 6, 8, 10, 12, 14 },
    { 0, 0, 2, 4, 6, 8, 10, 12, 0, 0, 3, 5, 7, 9, 11, 13 },
    { 0, 0, 0, 3, 5, 7, 9, 11, 0, 0, 0, 4, 6, 8, 10, 12 },
    { 0, 0, 0, 0, 4, 6, 8, 10, 0, 0, 0, 0, 5, 7, 9, 11 },
    { 0, 0, 0, 0, 0, 5, 7, 9, 0, 0, 0, 0, 0, 6, 8, 10 },
    { 0, 0, 0, 0, 0, 0, 6, 8, 0, 0, 0, 0, 0, 0, 7, 9 },
    { 0, 0, 0, 0, 0, 0, 0, 7, 0, 0, 0, 0, 0, 0, 0, 8 }
  };
  
  static AOM_FORCE_INLINE void dr_prediction_z1_HxW_internal_avx2(
      int H, int W, __m128i *dst, const uint8_t *above, int upsample_above,
      int dx) {
    const int frac_bits = 6 - upsample_above;
    const int max_base_x = ((W + H) - 1) << upsample_above;
  
    assert(dx > 0);
    // pre-filter above pixels
    // store in temp buffers:
    //   above[x] * 32 + 16
    //   above[x+1] - above[x]
    // final pixels will be calculated as:
    //   (above[x] * 32 + 16 + (above[x+1] - above[x]) * shift) >> 5
    __m256i a0, a1, a32, a16;
    __m256i diff, c3f;
    __m128i a_mbase_x;
  
    a16 = _mm256_set1_epi16(16);
    a_mbase_x = _mm_set1_epi8(above[max_base_x]);
    c3f = _mm256_set1_epi16(0x3f);
  
    int x = dx;
    for (int r = 0; r < W; r++) {
      __m256i b, res, shift;
      __m128i res1, a0_128, a1_128;
  
      int base = x >> frac_bits;
      int base_max_diff = (max_base_x - base) >> upsample_above;
      if (base_max_diff <= 0) {
        for (int i = r; i < W; ++i) {
          dst[i] = a_mbase_x;  // save 4 values
        }
        return;
      }
      if (base_max_diff > H) base_max_diff = H;
      a0_128 = _mm_loadu_si128((__m128i *)(above + base));
      a1_128 = _mm_loadu_si128((__m128i *)(above + base + 1));
  
      if (upsample_above) {
        a0_128 = _mm_shuffle_epi8(a0_128, *(__m128i *)EvenOddMaskx[0]);
        a1_128 = _mm_srli_si128(a0_128, 8);
  
        shift = _mm256_srli_epi16(
            _mm256_and_si256(
                _mm256_slli_epi16(_mm256_set1_epi16(x), upsample_above), c3f),
            1);
      } else {
        shift = _mm256_srli_epi16(_mm256_and_si256(_mm256_set1_epi16(x), c3f), 1);
      }
      a0 = _mm256_cvtepu8_epi16(a0_128);
      a1 = _mm256_cvtepu8_epi16(a1_128);
  
      diff = _mm256_sub_epi16(a1, a0);   // a[x+1] - a[x]
      a32 = _mm256_slli_epi16(a0, 5);    // a[x] * 32
      a32 = _mm256_add_epi16(a32, a16);  // a[x] * 32 + 16
  
      b = _mm256_mullo_epi16(diff, shift);
      res = _mm256_add_epi16(a32, b);
      res = _mm256_srli_epi16(res, 5);
  
      res = _mm256_packus_epi16(
          res, _mm256_castsi128_si256(
                   _mm256_extracti128_si256(res, 1)));  // goto 8 bit
      res1 = _mm256_castsi256_si128(res);               // 16 8bit values
  
      dst[r] =
          _mm_blendv_epi8(a_mbase_x, res1, *(__m128i *)BaseMask[base_max_diff]);
      x += dx;
    }
  }
  
  static void dr_prediction_z1_4xN_avx2(int N, uint8_t *dst, ptrdiff_t stride,
                                        const uint8_t *above, int upsample_above,
                                        int dx) {
    __m128i dstvec[16];
  
    dr_prediction_z1_HxW_internal_avx2(4, N, dstvec, above, upsample_above, dx);
    for (int i = 0; i < N; i++) {
      *(uint32_t *)(dst + stride * i) = _mm_cvtsi128_si32(dstvec[i]);
    }
  }
  
  static void dr_prediction_z1_8xN_avx2(int N, uint8_t *dst, ptrdiff_t stride,
                                        const uint8_t *above, int upsample_above,
                                        int dx) {
    __m128i dstvec[32];
  
    dr_prediction_z1_HxW_internal_avx2(8, N, dstvec, above, upsample_above, dx);
    for (int i = 0; i < N; i++) {
      _mm_storel_epi64((__m128i *)(dst + stride * i), dstvec[i]);
    }
  }
  
  static void dr_prediction_z1_16xN_avx2(int N, uint8_t *dst, ptrdiff_t stride,
                                         const uint8_t *above, int upsample_above,
                                         int dx) {
    __m128i dstvec[64];
  
    dr_prediction_z1_HxW_internal_avx2(16, N, dstvec, above, upsample_above, dx);
    for (int i = 0; i < N; i++) {
      _mm_storeu_si128((__m128i *)(dst + stride * i), dstvec[i]);
    }
  }
  
  static AOM_FORCE_INLINE void dr_prediction_z1_32xN_internal_avx2(
      int N, __m256i *dstvec, const uint8_t *above, int upsample_above, int dx) {
    // here upsample_above is 0 by design of av1_use_intra_edge_upsample
    (void)upsample_above;
    const int frac_bits = 6;
    const int max_base_x = ((32 + N) - 1);
  
    // pre-filter above pixels
    // store in temp buffers:
    //   above[x] * 32 + 16
    //   above[x+1] - above[x]
    // final pixels will be calculated as:
    //   (above[x] * 32 + 16 + (above[x+1] - above[x]) * shift) >> 5
    __m256i a0, a1, a32, a16;
    __m256i a_mbase_x, diff, c3f;
  
    a16 = _mm256_set1_epi16(16);
    a_mbase_x = _mm256_set1_epi8(above[max_base_x]);
    c3f = _mm256_set1_epi16(0x3f);
  
    int x = dx;
    for (int r = 0; r < N; r++) {
      __m256i b, res, res16[2];
      __m128i a0_128, a1_128;
  
      int base = x >> frac_bits;
      int base_max_diff = (max_base_x - base);
      if (base_max_diff <= 0) {
        for (int i = r; i < N; ++i) {
          dstvec[i] = a_mbase_x;  // save 32 values
        }
        return;
      }
      if (base_max_diff > 32) base_max_diff = 32;
      __m256i shift =
          _mm256_srli_epi16(_mm256_and_si256(_mm256_set1_epi16(x), c3f), 1);
  
      for (int j = 0, jj = 0; j < 32; j += 16, jj++) {
        int mdiff = base_max_diff - j;
        if (mdiff <= 0) {
          res16[jj] = a_mbase_x;
        } else {
          a0_128 = _mm_loadu_si128((__m128i *)(above + base + j));
          a1_128 = _mm_loadu_si128((__m128i *)(above + base + j + 1));
          a0 = _mm256_cvtepu8_epi16(a0_128);
          a1 = _mm256_cvtepu8_epi16(a1_128);
  
          diff = _mm256_sub_epi16(a1, a0);   // a[x+1] - a[x]
          a32 = _mm256_slli_epi16(a0, 5);    // a[x] * 32
          a32 = _mm256_add_epi16(a32, a16);  // a[x] * 32 + 16
          b = _mm256_mullo_epi16(diff, shift);
  
          res = _mm256_add_epi16(a32, b);
          res = _mm256_srli_epi16(res, 5);
          res16[jj] = _mm256_packus_epi16(
              res, _mm256_castsi128_si256(
                       _mm256_extracti128_si256(res, 1)));  // 16 8bit values
        }
      }
      res16[1] =
          _mm256_inserti128_si256(res16[0], _mm256_castsi256_si128(res16[1]),
                                  1);  // 32 8bit values
  
      dstvec[r] = _mm256_blendv_epi8(
          a_mbase_x, res16[1],
          *(__m256i *)BaseMask[base_max_diff]);  // 32 8bit values
      x += dx;
    }
  }
  
  static void dr_prediction_z1_32xN_avx2(int N, uint8_t *dst, ptrdiff_t stride,
                                         const uint8_t *above, int upsample_above,
                                         int dx) {
    __m256i dstvec[64];
    dr_prediction_z1_32xN_internal_avx2(N, dstvec, above, upsample_above, dx);
    for (int i = 0; i < N; i++) {
      _mm256_storeu_si256((__m256i *)(dst + stride * i), dstvec[i]);
    }
  }
  
  static void dr_prediction_z1_64xN_avx2(int N, uint8_t *dst, ptrdiff_t stride,
                                         const uint8_t *above, int upsample_above,
                                         int dx) {
    // here upsample_above is 0 by design of av1_use_intra_edge_upsample
    (void)upsample_above;
    const int frac_bits = 6;
    const int max_base_x = ((64 + N) - 1);
  
    // pre-filter above pixels
    // store in temp buffers:
    //   above[x] * 32 + 16
    //   above[x+1] - above[x]
    // final pixels will be calculated as:
    //   (above[x] * 32 + 16 + (above[x+1] - above[x]) * shift) >> 5
    __m256i a0, a1, a32, a16;
    __m256i a_mbase_x, diff, c3f;
    __m128i max_base_x128, base_inc128, mask128;
  
    a16 = _mm256_set1_epi16(16);
    a_mbase_x = _mm256_set1_epi8(above[max_base_x]);
    max_base_x128 = _mm_set1_epi8(max_base_x);
    c3f = _mm256_set1_epi16(0x3f);
  
    int x = dx;
    for (int r = 0; r < N; r++, dst += stride) {
      __m256i b, res;
      int base = x >> frac_bits;
      if (base >= max_base_x) {
        for (int i = r; i < N; ++i) {
          _mm256_storeu_si256((__m256i *)dst, a_mbase_x);  // save 32 values
          _mm256_storeu_si256((__m256i *)(dst + 32), a_mbase_x);
          dst += stride;
        }
        return;
      }
  
      __m256i shift =
          _mm256_srli_epi16(_mm256_and_si256(_mm256_set1_epi16(x), c3f), 1);
  
      __m128i a0_128, a1_128, res128;
      for (int j = 0; j < 64; j += 16) {
        int mdif = max_base_x - (base + j);
        if (mdif <= 0) {
          _mm_storeu_si128((__m128i *)(dst + j),
                           _mm256_castsi256_si128(a_mbase_x));
        } else {
          a0_128 = _mm_loadu_si128((__m128i *)(above + base + j));
          a1_128 = _mm_loadu_si128((__m128i *)(above + base + 1 + j));
          a0 = _mm256_cvtepu8_epi16(a0_128);
          a1 = _mm256_cvtepu8_epi16(a1_128);
  
          diff = _mm256_sub_epi16(a1, a0);   // a[x+1] - a[x]
          a32 = _mm256_slli_epi16(a0, 5);    // a[x] * 32
          a32 = _mm256_add_epi16(a32, a16);  // a[x] * 32 + 16
          b = _mm256_mullo_epi16(diff, shift);
  
          res = _mm256_add_epi16(a32, b);
          res = _mm256_srli_epi16(res, 5);
          res = _mm256_packus_epi16(
              res, _mm256_castsi128_si256(
                       _mm256_extracti128_si256(res, 1)));  // 16 8bit values
  
          base_inc128 =
              _mm_setr_epi8((uint8_t)(base + j), (uint8_t)(base + j + 1),
                            (uint8_t)(base + j + 2), (uint8_t)(base + j + 3),
                            (uint8_t)(base + j + 4), (uint8_t)(base + j + 5),
                            (uint8_t)(base + j + 6), (uint8_t)(base + j + 7),
                            (uint8_t)(base + j + 8), (uint8_t)(base + j + 9),
                            (uint8_t)(base + j + 10), (uint8_t)(base + j + 11),
                            (uint8_t)(base + j + 12), (uint8_t)(base + j + 13),
                            (uint8_t)(base + j + 14), (uint8_t)(base + j + 15));
  
          mask128 = _mm_cmpgt_epi8(_mm_subs_epu8(max_base_x128, base_inc128),
                                   _mm_setzero_si128());
          res128 = _mm_blendv_epi8(_mm256_castsi256_si128(a_mbase_x),
                                   _mm256_castsi256_si128(res), mask128);
          _mm_storeu_si128((__m128i *)(dst + j), res128);
        }
      }
      x += dx;
    }
  }
  
  // Directional prediction, zone 1: 0 < angle < 90
  void av1_dr_prediction_z1_avx2(uint8_t *dst, ptrdiff_t stride, int bw, int bh,
                                 const uint8_t *above, const uint8_t *left,
                                 int upsample_above, int dx, int dy) {
    (void)left;
    (void)dy;
    switch (bw) {
      case 4:
        dr_prediction_z1_4xN_avx2(bh, dst, stride, above, upsample_above, dx);
        break;
      case 8:
        dr_prediction_z1_8xN_avx2(bh, dst, stride, above, upsample_above, dx);
        break;
      case 16:
        dr_prediction_z1_16xN_avx2(bh, dst, stride, above, upsample_above, dx);
        break;
      case 32:
        dr_prediction_z1_32xN_avx2(bh, dst, stride, above, upsample_above, dx);
        break;
      case 64:
        dr_prediction_z1_64xN_avx2(bh, dst, stride, above, upsample_above, dx);
        break;
      default: break;
    }
    return;
  }
  
  static void dr_prediction_z2_Nx4_avx2(int N, uint8_t *dst, ptrdiff_t stride,
                                        const uint8_t *above, const uint8_t *left,
                                        int upsample_above, int upsample_left,
                                        int dx, int dy) {
    const int min_base_x = -(1 << upsample_above);
    const int min_base_y = -(1 << upsample_left);
    const int frac_bits_x = 6 - upsample_above;
    const int frac_bits_y = 6 - upsample_left;
  
    assert(dx > 0);
    // pre-filter above pixels
    // store in temp buffers:
    //   above[x] * 32 + 16
    //   above[x+1] - above[x]
    // final pixels will be calculated as:
    //   (above[x] * 32 + 16 + (above[x+1] - above[x]) * shift) >> 5
    __m128i a0_x, a1_x, a32, a16, diff;
    __m128i c3f, min_base_y128, c1234, dy128;
  
    a16 = _mm_set1_epi16(16);
    c3f = _mm_set1_epi16(0x3f);
    min_base_y128 = _mm_set1_epi16(min_base_y);
    c1234 = _mm_setr_epi16(0, 1, 2, 3, 4, 0, 0, 0);
    dy128 = _mm_set1_epi16(dy);
  
    for (int r = 0; r < N; r++) {
      __m128i b, res, shift, r6, ydx;
      __m128i resx, resy, resxy;
      __m128i a0_x128, a1_x128;
      int y = r + 1;
      int base_x = (-y * dx) >> frac_bits_x;
      int base_shift = 0;
      if (base_x < (min_base_x - 1)) {
        base_shift = (min_base_x - base_x - 1) >> upsample_above;
      }
      int base_min_diff =
          (min_base_x - base_x + upsample_above) >> upsample_above;
      if (base_min_diff > 4) {
        base_min_diff = 4;
      } else {
        if (base_min_diff < 0) base_min_diff = 0;
      }
  
      if (base_shift > 3) {
        a0_x = _mm_setzero_si128();
        a1_x = _mm_setzero_si128();
        shift = _mm_setzero_si128();
      } else {
        a0_x128 = _mm_loadu_si128((__m128i *)(above + base_x + base_shift));
        ydx = _mm_set1_epi16(y * dx);
        r6 = _mm_slli_epi16(c1234, 6);
  
        if (upsample_above) {
          a0_x128 =
              _mm_shuffle_epi8(a0_x128, *(__m128i *)EvenOddMaskx[base_shift]);
          a1_x128 = _mm_srli_si128(a0_x128, 8);
  
          shift = _mm_srli_epi16(
              _mm_and_si128(
                  _mm_slli_epi16(_mm_sub_epi16(r6, ydx), upsample_above), c3f),
              1);
        } else {
          a0_x128 = _mm_shuffle_epi8(a0_x128, *(__m128i *)LoadMaskx[base_shift]);
          a1_x128 = _mm_srli_si128(a0_x128, 1);
  
          shift = _mm_srli_epi16(_mm_and_si128(_mm_sub_epi16(r6, ydx), c3f), 1);
        }
        a0_x = _mm_cvtepu8_epi16(a0_x128);
        a1_x = _mm_cvtepu8_epi16(a1_x128);
      }
      // y calc
      __m128i a0_y, a1_y, shifty;
      if (base_x < min_base_x) {
        DECLARE_ALIGNED(32, int16_t, base_y_c[8]);
        __m128i y_c128, base_y_c128, mask128, c1234_;
        c1234_ = _mm_srli_si128(c1234, 2);
        r6 = _mm_set1_epi16(r << 6);
        y_c128 = _mm_sub_epi16(r6, _mm_mullo_epi16(c1234_, dy128));
        base_y_c128 = _mm_srai_epi16(y_c128, frac_bits_y);
        mask128 = _mm_cmpgt_epi16(min_base_y128, base_y_c128);
        base_y_c128 = _mm_andnot_si128(mask128, base_y_c128);
        _mm_store_si128((__m128i *)base_y_c, base_y_c128);
  
        a0_y = _mm_setr_epi16(left[base_y_c[0]], left[base_y_c[1]],
                              left[base_y_c[2]], left[base_y_c[3]], 0, 0, 0, 0);
        base_y_c128 = _mm_add_epi16(base_y_c128, _mm_srli_epi16(a16, 4));
        _mm_store_si128((__m128i *)base_y_c, base_y_c128);
        a1_y = _mm_setr_epi16(left[base_y_c[0]], left[base_y_c[1]],
                              left[base_y_c[2]], left[base_y_c[3]], 0, 0, 0, 0);
  
        if (upsample_left) {
          shifty = _mm_srli_epi16(
              _mm_and_si128(_mm_slli_epi16(y_c128, upsample_left), c3f), 1);
        } else {
          shifty = _mm_srli_epi16(_mm_and_si128(y_c128, c3f), 1);
        }
        a0_x = _mm_unpacklo_epi64(a0_x, a0_y);
        a1_x = _mm_unpacklo_epi64(a1_x, a1_y);
        shift = _mm_unpacklo_epi64(shift, shifty);
      }
  
      diff = _mm_sub_epi16(a1_x, a0_x);  // a[x+1] - a[x]
      a32 = _mm_slli_epi16(a0_x, 5);     // a[x] * 32
      a32 = _mm_add_epi16(a32, a16);     // a[x] * 32 + 16
  
      b = _mm_mullo_epi16(diff, shift);
      res = _mm_add_epi16(a32, b);
      res = _mm_srli_epi16(res, 5);
  
      resx = _mm_packus_epi16(res, res);
      resy = _mm_srli_si128(resx, 4);
  
      resxy = _mm_blendv_epi8(resx, resy, *(__m128i *)BaseMask[base_min_diff]);
      *(uint32_t *)(dst) = _mm_cvtsi128_si32(resxy);
      dst += stride;
    }
  }
  
  static void dr_prediction_z2_Nx8_avx2(int N, uint8_t *dst, ptrdiff_t stride,
                                        const uint8_t *above, const uint8_t *left,
                                        int upsample_above, int upsample_left,
                                        int dx, int dy) {
    const int min_base_x = -(1 << upsample_above);
    const int min_base_y = -(1 << upsample_left);
    const int frac_bits_x = 6 - upsample_above;
    const int frac_bits_y = 6 - upsample_left;
  
    // pre-filter above pixels
    // store in temp buffers:
    //   above[x] * 32 + 16
    //   above[x+1] - above[x]
    // final pixels will be calculated as:
    //   (above[x] * 32 + 16 + (above[x+1] - above[x]) * shift) >> 5
    __m256i diff, a32, a16;
    __m256i a0_x, a1_x;
    __m128i a0_x128, a1_x128, min_base_y128, c3f;
    __m128i c1234, dy128;
  
    a16 = _mm256_set1_epi16(16);
    c3f = _mm_set1_epi16(0x3f);
    min_base_y128 = _mm_set1_epi16(min_base_y);
    dy128 = _mm_set1_epi16(dy);
    c1234 = _mm_setr_epi16(1, 2, 3, 4, 5, 6, 7, 8);
  
    for (int r = 0; r < N; r++) {
      __m256i b, res, shift;
      __m128i resx, resy, resxy, r6, ydx;
  
      int y = r + 1;
      int base_x = (-y * dx) >> frac_bits_x;
      int base_shift = 0;
      if (base_x < (min_base_x - 1)) {
        base_shift = (min_base_x - base_x - 1) >> upsample_above;
      }
      int base_min_diff =
          (min_base_x - base_x + upsample_above) >> upsample_above;
      if (base_min_diff > 8) {
        base_min_diff = 8;
      } else {
        if (base_min_diff < 0) base_min_diff = 0;
      }
  
      if (base_shift > 7) {
        a0_x = _mm256_setzero_si256();
        a1_x = _mm256_setzero_si256();
        shift = _mm256_setzero_si256();
      } else {
        a0_x128 = _mm_loadu_si128((__m128i *)(above + base_x + base_shift));
        ydx = _mm_set1_epi16(y * dx);
        r6 = _mm_slli_epi16(_mm_srli_si128(c1234, 2), 6);
        if (upsample_above) {
          a0_x128 =
              _mm_shuffle_epi8(a0_x128, *(__m128i *)EvenOddMaskx[base_shift]);
          a1_x128 = _mm_srli_si128(a0_x128, 8);
  
          shift = _mm256_castsi128_si256(_mm_srli_epi16(
              _mm_and_si128(
                  _mm_slli_epi16(_mm_sub_epi16(r6, ydx), upsample_above), c3f),
              1));
        } else {
          a1_x128 = _mm_srli_si128(a0_x128, 1);
          a0_x128 = _mm_shuffle_epi8(a0_x128, *(__m128i *)LoadMaskx[base_shift]);
          a1_x128 = _mm_shuffle_epi8(a1_x128, *(__m128i *)LoadMaskx[base_shift]);
  
          shift = _mm256_castsi128_si256(
              _mm_srli_epi16(_mm_and_si128(_mm_sub_epi16(r6, ydx), c3f), 1));
        }
        a0_x = _mm256_castsi128_si256(_mm_cvtepu8_epi16(a0_x128));
        a1_x = _mm256_castsi128_si256(_mm_cvtepu8_epi16(a1_x128));
      }
  
      // y calc
      __m128i a0_y, a1_y, shifty;
      if (base_x < min_base_x) {
        DECLARE_ALIGNED(32, int16_t, base_y_c[16]);
        __m128i y_c128, base_y_c128, mask128;
        r6 = _mm_set1_epi16(r << 6);
        y_c128 = _mm_sub_epi16(r6, _mm_mullo_epi16(c1234, dy128));
        base_y_c128 = _mm_srai_epi16(y_c128, frac_bits_y);
        mask128 = _mm_cmpgt_epi16(min_base_y128, base_y_c128);
        base_y_c128 = _mm_andnot_si128(mask128, base_y_c128);
        _mm_store_si128((__m128i *)base_y_c, base_y_c128);
  
        a0_y = _mm_setr_epi16(left[base_y_c[0]], left[base_y_c[1]],
                              left[base_y_c[2]], left[base_y_c[3]],
                              left[base_y_c[4]], left[base_y_c[5]],
                              left[base_y_c[6]], left[base_y_c[7]]);
        base_y_c128 = _mm_add_epi16(
            base_y_c128, _mm_srli_epi16(_mm256_castsi256_si128(a16), 4));
        _mm_store_si128((__m128i *)base_y_c, base_y_c128);
  
        a1_y = _mm_setr_epi16(left[base_y_c[0]], left[base_y_c[1]],
                              left[base_y_c[2]], left[base_y_c[3]],
                              left[base_y_c[4]], left[base_y_c[5]],
                              left[base_y_c[6]], left[base_y_c[7]]);
  
        if (upsample_left) {
          shifty = _mm_srli_epi16(
              _mm_and_si128(_mm_slli_epi16(y_c128, upsample_left), c3f), 1);
        } else {
          shifty = _mm_srli_epi16(_mm_and_si128(y_c128, c3f), 1);
        }
  
        a0_x = _mm256_inserti128_si256(a0_x, a0_y, 1);
        a1_x = _mm256_inserti128_si256(a1_x, a1_y, 1);
        shift = _mm256_inserti128_si256(shift, shifty, 1);
      }
  
      diff = _mm256_sub_epi16(a1_x, a0_x);  // a[x+1] - a[x]
      a32 = _mm256_slli_epi16(a0_x, 5);     // a[x] * 32
      a32 = _mm256_add_epi16(a32, a16);     // a[x] * 32 + 16
  
      b = _mm256_mullo_epi16(diff, shift);
      res = _mm256_add_epi16(a32, b);
      res = _mm256_srli_epi16(res, 5);
  
      resx = _mm_packus_epi16(_mm256_castsi256_si128(res),
                              _mm256_castsi256_si128(res));
      resy = _mm256_extracti128_si256(res, 1);
      resy = _mm_packus_epi16(resy, resy);
  
      resxy = _mm_blendv_epi8(resx, resy, *(__m128i *)BaseMask[base_min_diff]);
      _mm_storel_epi64((__m128i *)(dst), resxy);
      dst += stride;
    }
  }
  
  static void dr_prediction_z2_HxW_avx2(int H, int W, uint8_t *dst,
                                        ptrdiff_t stride, const uint8_t *above,
                                        const uint8_t *left, int upsample_above,
                                        int upsample_left, int dx, int dy) {
    // here upsample_above and upsample_left are 0 by design of
    // av1_use_intra_edge_upsample
    const int min_base_x = -1;
    const int min_base_y = -1;
    (void)upsample_above;
    (void)upsample_left;
    const int frac_bits_x = 6;
    const int frac_bits_y = 6;
  
    __m256i a0_x, a1_x, a0_y, a1_y, a32, a16, c1234, c0123;
    __m256i diff, min_base_y256, c3f, shifty, dy256, c1;
    __m128i a0_x128, a1_x128;
  
    DECLARE_ALIGNED(32, int16_t, base_y_c[16]);
    a16 = _mm256_set1_epi16(16);
    c1 = _mm256_srli_epi16(a16, 4);
    min_base_y256 = _mm256_set1_epi16(min_base_y);
    c3f = _mm256_set1_epi16(0x3f);
    dy256 = _mm256_set1_epi16(dy);
    c0123 =
        _mm256_setr_epi16(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15);
    c1234 = _mm256_add_epi16(c0123, c1);
  
    for (int r = 0; r < H; r++) {
      __m256i b, res, shift, j256, r6, ydx;
      __m128i resx, resy;
      __m128i resxy;
      int y = r + 1;
      ydx = _mm256_set1_epi16((uint16_t)(y * dx));
  
      int base_x = (-y * dx) >> frac_bits_x;
      for (int j = 0; j < W; j += 16) {
        j256 = _mm256_set1_epi16(j);
        int base_shift = 0;
        if ((base_x + j) < (min_base_x - 1)) {
          base_shift = (min_base_x - (base_x + j) - 1);
        }
        int base_min_diff = (min_base_x - base_x - j);
        if (base_min_diff > 16) {
          base_min_diff = 16;
        } else {
          if (base_min_diff < 0) base_min_diff = 0;
        }
  
        if (base_shift < 16) {
          a0_x128 = _mm_loadu_si128((__m128i *)(above + base_x + base_shift + j));
          a1_x128 =
              _mm_loadu_si128((__m128i *)(above + base_x + base_shift + 1 + j));
          a0_x128 = _mm_shuffle_epi8(a0_x128, *(__m128i *)LoadMaskx[base_shift]);
          a1_x128 = _mm_shuffle_epi8(a1_x128, *(__m128i *)LoadMaskx[base_shift]);
  
          a0_x = _mm256_cvtepu8_epi16(a0_x128);
          a1_x = _mm256_cvtepu8_epi16(a1_x128);
  
          r6 = _mm256_slli_epi16(_mm256_add_epi16(c0123, j256), 6);
          shift = _mm256_srli_epi16(
              _mm256_and_si256(_mm256_sub_epi16(r6, ydx), c3f), 1);
  
          diff = _mm256_sub_epi16(a1_x, a0_x);  // a[x+1] - a[x]
          a32 = _mm256_slli_epi16(a0_x, 5);     // a[x] * 32
          a32 = _mm256_add_epi16(a32, a16);     // a[x] * 32 + 16
  
          b = _mm256_mullo_epi16(diff, shift);
          res = _mm256_add_epi16(a32, b);
          res = _mm256_srli_epi16(res, 5);  // 16 16-bit values
          resx = _mm256_castsi256_si128(_mm256_packus_epi16(
              res, _mm256_castsi128_si256(_mm256_extracti128_si256(res, 1))));
        } else {
          resx = _mm_setzero_si128();
        }
  
        // y calc
        if (base_x < min_base_x) {
          __m256i c256, y_c256, base_y_c256, mask256, mul16;
          r6 = _mm256_set1_epi16(r << 6);
          c256 = _mm256_add_epi16(j256, c1234);
          mul16 = _mm256_min_epu16(_mm256_mullo_epi16(c256, dy256),
                                   _mm256_srli_epi16(min_base_y256, 1));
          y_c256 = _mm256_sub_epi16(r6, mul16);
  
          base_y_c256 = _mm256_srai_epi16(y_c256, frac_bits_y);
          mask256 = _mm256_cmpgt_epi16(min_base_y256, base_y_c256);
          base_y_c256 = _mm256_andnot_si256(mask256, base_y_c256);
          _mm256_store_si256((__m256i *)base_y_c, base_y_c256); /**/
  
          a0_y = _mm256_setr_epi16(
              left[base_y_c[0]], left[base_y_c[1]], left[base_y_c[2]],
              left[base_y_c[3]], left[base_y_c[4]], left[base_y_c[5]],
              left[base_y_c[6]], left[base_y_c[7]], left[base_y_c[8]],
              left[base_y_c[9]], left[base_y_c[10]], left[base_y_c[11]],
              left[base_y_c[12]], left[base_y_c[13]], left[base_y_c[14]],
              left[base_y_c[15]]);
          base_y_c256 = _mm256_add_epi16(base_y_c256, c1);
          _mm256_store_si256((__m256i *)base_y_c, base_y_c256);
  
          a1_y = _mm256_setr_epi16(
              left[base_y_c[0]], left[base_y_c[1]], left[base_y_c[2]],
              left[base_y_c[3]], left[base_y_c[4]], left[base_y_c[5]],
              left[base_y_c[6]], left[base_y_c[7]], left[base_y_c[8]],
              left[base_y_c[9]], left[base_y_c[10]], left[base_y_c[11]],
              left[base_y_c[12]], left[base_y_c[13]], left[base_y_c[14]],
              left[base_y_c[15]]);
  
          shifty = _mm256_srli_epi16(_mm256_and_si256(y_c256, c3f), 1);
  
          diff = _mm256_sub_epi16(a1_y, a0_y);  // a[x+1] - a[x]
          a32 = _mm256_slli_epi16(a0_y, 5);     // a[x] * 32
          a32 = _mm256_add_epi16(a32, a16);     // a[x] * 32 + 16
  
          b = _mm256_mullo_epi16(diff, shifty);
          res = _mm256_add_epi16(a32, b);
          res = _mm256_srli_epi16(res, 5);  // 16 16-bit values
          resy = _mm256_castsi256_si128(_mm256_packus_epi16(
              res, _mm256_castsi128_si256(_mm256_extracti128_si256(res, 1))));
        } else {
          resy = _mm_setzero_si128();
        }
        resxy = _mm_blendv_epi8(resx, resy, *(__m128i *)BaseMask[base_min_diff]);
        _mm_storeu_si128((__m128i *)(dst + j), resxy);
      }  // for j
      dst += stride;
    }
  }
  
  // Directional prediction, zone 2: 90 < angle < 180
  void av1_dr_prediction_z2_avx2(uint8_t *dst, ptrdiff_t stride, int bw, int bh,
                                 const uint8_t *above, const uint8_t *left,
                                 int upsample_above, int upsample_left, int dx,
                                 int dy) {
    assert(dx > 0);
    assert(dy > 0);
    switch (bw) {
      case 4:
        dr_prediction_z2_Nx4_avx2(bh, dst, stride, above, left, upsample_above,
                                  upsample_left, dx, dy);
        break;
      case 8:
        dr_prediction_z2_Nx8_avx2(bh, dst, stride, above, left, upsample_above,
                                  upsample_left, dx, dy);
        break;
      default:
        dr_prediction_z2_HxW_avx2(bh, bw, dst, stride, above, left,
                                  upsample_above, upsample_left, dx, dy);
        break;
    }
    return;
  }
  
  // z3 functions
  static INLINE void transpose4x16_sse2(__m128i *x, __m128i *d) {
    __m128i w0, w1, w2, w3, ww0, ww1, ww2, ww3;
    w0 = _mm_unpacklo_epi8(x[0], x[1]);
    w1 = _mm_unpacklo_epi8(x[2], x[3]);
    w2 = _mm_unpackhi_epi8(x[0], x[1]);
    w3 = _mm_unpackhi_epi8(x[2], x[3]);
  
    ww0 = _mm_unpacklo_epi16(w0, w1);
    ww1 = _mm_unpacklo_epi16(w2, w3);
    ww2 = _mm_unpackhi_epi16(w0, w1);
    ww3 = _mm_unpackhi_epi16(w2, w3);
  
    w0 = _mm_unpacklo_epi32(ww0, ww1);
    w2 = _mm_unpacklo_epi32(ww2, ww3);
    w1 = _mm_unpackhi_epi32(ww0, ww1);
    w3 = _mm_unpackhi_epi32(ww2, ww3);
  
    d[0] = _mm_unpacklo_epi64(w0, w2);
    d[1] = _mm_unpackhi_epi64(w0, w2);
    d[2] = _mm_unpacklo_epi64(w1, w3);
    d[3] = _mm_unpackhi_epi64(w1, w3);
  
    d[4] = _mm_srli_si128(d[0], 8);
    d[5] = _mm_srli_si128(d[1], 8);
    d[6] = _mm_srli_si128(d[2], 8);
    d[7] = _mm_srli_si128(d[3], 8);
  
    d[8] = _mm_srli_si128(d[0], 4);
    d[9] = _mm_srli_si128(d[1], 4);
    d[10] = _mm_srli_si128(d[2], 4);
    d[11] = _mm_srli_si128(d[3], 4);
  
    d[12] = _mm_srli_si128(d[0], 12);
    d[13] = _mm_srli_si128(d[1], 12);
    d[14] = _mm_srli_si128(d[2], 12);
    d[15] = _mm_srli_si128(d[3], 12);
  }
  
  static INLINE void transpose16x32_avx2(__m256i *x, __m256i *d) {
    __m256i w0, w1, w2, w3, w4, w5, w6, w7, w8, w9;
    __m256i w10, w11, w12, w13, w14, w15;
  
    w0 = _mm256_unpacklo_epi8(x[0], x[1]);
    w1 = _mm256_unpacklo_epi8(x[2], x[3]);
    w2 = _mm256_unpacklo_epi8(x[4], x[5]);
    w3 = _mm256_unpacklo_epi8(x[6], x[7]);
  
    w8 = _mm256_unpacklo_epi8(x[8], x[9]);
    w9 = _mm256_unpacklo_epi8(x[10], x[11]);
    w10 = _mm256_unpacklo_epi8(x[12], x[13]);
    w11 = _mm256_unpacklo_epi8(x[14], x[15]);
  
    w4 = _mm256_unpacklo_epi16(w0, w1);
    w5 = _mm256_unpacklo_epi16(w2, w3);
    w12 = _mm256_unpacklo_epi16(w8, w9);
    w13 = _mm256_unpacklo_epi16(w10, w11);
  
    w6 = _mm256_unpacklo_epi32(w4, w5);
    w7 = _mm256_unpackhi_epi32(w4, w5);
    w14 = _mm256_unpacklo_epi32(w12, w13);
    w15 = _mm256_unpackhi_epi32(w12, w13);
  
    // Store first 4-line result
    d[0] = _mm256_unpacklo_epi64(w6, w14);
    d[1] = _mm256_unpackhi_epi64(w6, w14);
    d[2] = _mm256_unpacklo_epi64(w7, w15);
    d[3] = _mm256_unpackhi_epi64(w7, w15);
  
    w4 = _mm256_unpackhi_epi16(w0, w1);
    w5 = _mm256_unpackhi_epi16(w2, w3);
    w12 = _mm256_unpackhi_epi16(w8, w9);
    w13 = _mm256_unpackhi_epi16(w10, w11);
  
    w6 = _mm256_unpacklo_epi32(w4, w5);
    w7 = _mm256_unpackhi_epi32(w4, w5);
    w14 = _mm256_unpacklo_epi32(w12, w13);
    w15 = _mm256_unpackhi_epi32(w12, w13);
  
    // Store second 4-line result
    d[4] = _mm256_unpacklo_epi64(w6, w14);
    d[5] = _mm256_unpackhi_epi64(w6, w14);
    d[6] = _mm256_unpacklo_epi64(w7, w15);
    d[7] = _mm256_unpackhi_epi64(w7, w15);
  
    // upper half
    w0 = _mm256_unpackhi_epi8(x[0], x[1]);
    w1 = _mm256_unpackhi_epi8(x[2], x[3]);
    w2 = _mm256_unpackhi_epi8(x[4], x[5]);
    w3 = _mm256_unpackhi_epi8(x[6], x[7]);
  
    w8 = _mm256_unpackhi_epi8(x[8], x[9]);
    w9 = _mm256_unpackhi_epi8(x[10], x[11]);
    w10 = _mm256_unpackhi_epi8(x[12], x[13]);
    w11 = _mm256_unpackhi_epi8(x[14], x[15]);
  
    w4 = _mm256_unpacklo_epi16(w0, w1);
    w5 = _mm256_unpacklo_epi16(w2, w3);
    w12 = _mm256_unpacklo_epi16(w8, w9);
    w13 = _mm256_unpacklo_epi16(w10, w11);
  
    w6 = _mm256_unpacklo_epi32(w4, w5);
    w7 = _mm256_unpackhi_epi32(w4, w5);
    w14 = _mm256_unpacklo_epi32(w12, w13);
    w15 = _mm256_unpackhi_epi32(w12, w13);
  
    // Store first 4-line result
    d[8] = _mm256_unpacklo_epi64(w6, w14);
    d[9] = _mm256_unpackhi_epi64(w6, w14);
    d[10] = _mm256_unpacklo_epi64(w7, w15);
    d[11] = _mm256_unpackhi_epi64(w7, w15);
  
    w4 = _mm256_unpackhi_epi16(w0, w1);
    w5 = _mm256_unpackhi_epi16(w2, w3);
    w12 = _mm256_unpackhi_epi16(w8, w9);
    w13 = _mm256_unpackhi_epi16(w10, w11);
  
    w6 = _mm256_unpacklo_epi32(w4, w5);
    w7 = _mm256_unpackhi_epi32(w4, w5);
    w14 = _mm256_unpacklo_epi32(w12, w13);
    w15 = _mm256_unpackhi_epi32(w12, w13);
  
    // Store second 4-line result
    d[12] = _mm256_unpacklo_epi64(w6, w14);
    d[13] = _mm256_unpackhi_epi64(w6, w14);
    d[14] = _mm256_unpacklo_epi64(w7, w15);
    d[15] = _mm256_unpackhi_epi64(w7, w15);
  }
  
  static INLINE void transpose16x16_sse2(__m128i *x, __m128i *d) {
    __m128i w0, w1, w2, w3, w4, w5, w6, w7, w8, w9;
    __m128i w10, w11, w12, w13, w14, w15;
  
    w0 = _mm_unpacklo_epi8(x[0], x[1]);
    w1 = _mm_unpacklo_epi8(x[2], x[3]);
    w2 = _mm_unpacklo_epi8(x[4], x[5]);
    w3 = _mm_unpacklo_epi8(x[6], x[7]);
  
    w8 = _mm_unpacklo_epi8(x[8], x[9]);
    w9 = _mm_unpacklo_epi8(x[10], x[11]);
    w10 = _mm_unpacklo_epi8(x[12], x[13]);
    w11 = _mm_unpacklo_epi8(x[14], x[15]);
  
    w4 = _mm_unpacklo_epi16(w0, w1);
    w5 = _mm_unpacklo_epi16(w2, w3);
    w12 = _mm_unpacklo_epi16(w8, w9);
    w13 = _mm_unpacklo_epi16(w10, w11);
  
    w6 = _mm_unpacklo_epi32(w4, w5);
    w7 = _mm_unpackhi_epi32(w4, w5);
    w14 = _mm_unpacklo_epi32(w12, w13);
    w15 = _mm_unpackhi_epi32(w12, w13);
  
    // Store first 4-line result
    d[0] = _mm_unpacklo_epi64(w6, w14);
    d[1] = _mm_unpackhi_epi64(w6, w14);
    d[2] = _mm_unpacklo_epi64(w7, w15);
    d[3] = _mm_unpackhi_epi64(w7, w15);
  
    w4 = _mm_unpackhi_epi16(w0, w1);
    w5 = _mm_unpackhi_epi16(w2, w3);
    w12 = _mm_unpackhi_epi16(w8, w9);
    w13 = _mm_unpackhi_epi16(w10, w11);
  
    w6 = _mm_unpacklo_epi32(w4, w5);
    w7 = _mm_unpackhi_epi32(w4, w5);
    w14 = _mm_unpacklo_epi32(w12, w13);
    w15 = _mm_unpackhi_epi32(w12, w13);
  
    // Store second 4-line result
    d[4] = _mm_unpacklo_epi64(w6, w14);
    d[5] = _mm_unpackhi_epi64(w6, w14);
    d[6] = _mm_unpacklo_epi64(w7, w15);
    d[7] = _mm_unpackhi_epi64(w7, w15);
  
    // upper half
    w0 = _mm_unpackhi_epi8(x[0], x[1]);
    w1 = _mm_unpackhi_epi8(x[2], x[3]);
    w2 = _mm_unpackhi_epi8(x[4], x[5]);
    w3 = _mm_unpackhi_epi8(x[6], x[7]);
  
    w8 = _mm_unpackhi_epi8(x[8], x[9]);
    w9 = _mm_unpackhi_epi8(x[10], x[11]);
    w10 = _mm_unpackhi_epi8(x[12], x[13]);
    w11 = _mm_unpackhi_epi8(x[14], x[15]);
  
    w4 = _mm_unpacklo_epi16(w0, w1);
    w5 = _mm_unpacklo_epi16(w2, w3);
    w12 = _mm_unpacklo_epi16(w8, w9);
    w13 = _mm_unpacklo_epi16(w10, w11);
  
    w6 = _mm_unpacklo_epi32(w4, w5);
    w7 = _mm_unpackhi_epi32(w4, w5);
    w14 = _mm_unpacklo_epi32(w12, w13);
    w15 = _mm_unpackhi_epi32(w12, w13);
  
    // Store first 4-line result
    d[8] = _mm_unpacklo_epi64(w6, w14);
    d[9] = _mm_unpackhi_epi64(w6, w14);
    d[10] = _mm_unpacklo_epi64(w7, w15);
    d[11] = _mm_unpackhi_epi64(w7, w15);
  
    w4 = _mm_unpackhi_epi16(w0, w1);
    w5 = _mm_unpackhi_epi16(w2, w3);
    w12 = _mm_unpackhi_epi16(w8, w9);
    w13 = _mm_unpackhi_epi16(w10, w11);
  
    w6 = _mm_unpacklo_epi32(w4, w5);
    w7 = _mm_unpackhi_epi32(w4, w5);
    w14 = _mm_unpacklo_epi32(w12, w13);
    w15 = _mm_unpackhi_epi32(w12, w13);
  
    // Store second 4-line result
    d[12] = _mm_unpacklo_epi64(w6, w14);
    d[13] = _mm_unpackhi_epi64(w6, w14);
    d[14] = _mm_unpacklo_epi64(w7, w15);
    d[15] = _mm_unpackhi_epi64(w7, w15);
  }
  
  static void transpose_TX_16X16(const uint8_t *src, ptrdiff_t pitchSrc,
                                 uint8_t *dst, ptrdiff_t pitchDst) {
    __m128i r[16];
    __m128i d[16];
    for (int j = 0; j < 16; j++) {
      r[j] = _mm_loadu_si128((__m128i *)(src + j * pitchSrc));
    }
    transpose16x16_sse2(r, d);
    for (int j = 0; j < 16; j++) {
      _mm_storeu_si128((__m128i *)(dst + j * pitchDst), d[j]);
    }
  }
  
  static void transpose(const uint8_t *src, ptrdiff_t pitchSrc, uint8_t *dst,
                        ptrdiff_t pitchDst, int width, int height) {
    for (int j = 0; j < height; j += 16)
      for (int i = 0; i < width; i += 16)
        transpose_TX_16X16(src + i * pitchSrc + j, pitchSrc,
                           dst + j * pitchDst + i, pitchDst);
  }
  
  static void dr_prediction_z3_4x4_avx2(uint8_t *dst, ptrdiff_t stride,
                                        const uint8_t *left, int upsample_left,
                                        int dy) {
    __m128i dstvec[4], d[4];
  
    dr_prediction_z1_HxW_internal_avx2(4, 4, dstvec, left, upsample_left, dy);
    transpose4x8_8x4_low_sse2(&dstvec[0], &dstvec[1], &dstvec[2], &dstvec[3],
                              &d[0], &d[1], &d[2], &d[3]);
  
    *(uint32_t *)(dst + stride * 0) = _mm_cvtsi128_si32(d[0]);
    *(uint32_t *)(dst + stride * 1) = _mm_cvtsi128_si32(d[1]);
    *(uint32_t *)(dst + stride * 2) = _mm_cvtsi128_si32(d[2]);
    *(uint32_t *)(dst + stride * 3) = _mm_cvtsi128_si32(d[3]);
    return;
  }
  
  static void dr_prediction_z3_8x8_avx2(uint8_t *dst, ptrdiff_t stride,
                                        const uint8_t *left, int upsample_left,
                                        int dy) {
    __m128i dstvec[8], d[8];
  
    dr_prediction_z1_HxW_internal_avx2(8, 8, dstvec, left, upsample_left, dy);
    transpose8x8_sse2(&dstvec[0], &dstvec[1], &dstvec[2], &dstvec[3], &dstvec[4],
                      &dstvec[5], &dstvec[6], &dstvec[7], &d[0], &d[1], &d[2],
                      &d[3]);
  
    _mm_storel_epi64((__m128i *)(dst + 0 * stride), d[0]);
    _mm_storel_epi64((__m128i *)(dst + 1 * stride), _mm_srli_si128(d[0], 8));
    _mm_storel_epi64((__m128i *)(dst + 2 * stride), d[1]);
    _mm_storel_epi64((__m128i *)(dst + 3 * stride), _mm_srli_si128(d[1], 8));
    _mm_storel_epi64((__m128i *)(dst + 4 * stride), d[2]);
    _mm_storel_epi64((__m128i *)(dst + 5 * stride), _mm_srli_si128(d[2], 8));
    _mm_storel_epi64((__m128i *)(dst + 6 * stride), d[3]);
    _mm_storel_epi64((__m128i *)(dst + 7 * stride), _mm_srli_si128(d[3], 8));
  }
  
  static void dr_prediction_z3_4x8_avx2(uint8_t *dst, ptrdiff_t stride,
                                        const uint8_t *left, int upsample_left,
                                        int dy) {
    __m128i dstvec[4], d[8];
  
    dr_prediction_z1_HxW_internal_avx2(8, 4, dstvec, left, upsample_left, dy);
    transpose4x8_8x4_sse2(&dstvec[0], &dstvec[1], &dstvec[2], &dstvec[3], &d[0],
                          &d[1], &d[2], &d[3], &d[4], &d[5], &d[6], &d[7]);
    for (int i = 0; i < 8; i++) {
      *(uint32_t *)(dst + stride * i) = _mm_cvtsi128_si32(d[i]);
    }
  }
  
  static void dr_prediction_z3_8x4_avx2(uint8_t *dst, ptrdiff_t stride,
                                        const uint8_t *left, int upsample_left,
                                        int dy) {
    __m128i dstvec[8], d[4];
  
    dr_prediction_z1_HxW_internal_avx2(4, 8, dstvec, left, upsample_left, dy);
    transpose8x8_low_sse2(&dstvec[0], &dstvec[1], &dstvec[2], &dstvec[3],
                          &dstvec[4], &dstvec[5], &dstvec[6], &dstvec[7], &d[0],
                          &d[1], &d[2], &d[3]);
    _mm_storel_epi64((__m128i *)(dst + 0 * stride), d[0]);
    _mm_storel_epi64((__m128i *)(dst + 1 * stride), d[1]);
    _mm_storel_epi64((__m128i *)(dst + 2 * stride), d[2]);
    _mm_storel_epi64((__m128i *)(dst + 3 * stride), d[3]);
  }
  
  static void dr_prediction_z3_8x16_avx2(uint8_t *dst, ptrdiff_t stride,
                                         const uint8_t *left, int upsample_left,
                                         int dy) {
    __m128i dstvec[8], d[8];
  
    dr_prediction_z1_HxW_internal_avx2(16, 8, dstvec, left, upsample_left, dy);
    transpose8x16_16x8_sse2(dstvec, dstvec + 1, dstvec + 2, dstvec + 3,
                            dstvec + 4, dstvec + 5, dstvec + 6, dstvec + 7, d,
                            d + 1, d + 2, d + 3, d + 4, d + 5, d + 6, d + 7);
    for (int i = 0; i < 8; i++) {
      _mm_storel_epi64((__m128i *)(dst + i * stride), d[i]);
      _mm_storel_epi64((__m128i *)(dst + (i + 8) * stride),
                       _mm_srli_si128(d[i], 8));
    }
  }
  
  static void dr_prediction_z3_16x8_avx2(uint8_t *dst, ptrdiff_t stride,
                                         const uint8_t *left, int upsample_left,
                                         int dy) {
    __m128i dstvec[16], d[16];
  
    dr_prediction_z1_HxW_internal_avx2(8, 16, dstvec, left, upsample_left, dy);
    transpose16x8_8x16_sse2(
        &dstvec[0], &dstvec[1], &dstvec[2], &dstvec[3], &dstvec[4], &dstvec[5],
        &dstvec[6], &dstvec[7], &dstvec[8], &dstvec[9], &dstvec[10], &dstvec[11],
        &dstvec[12], &dstvec[13], &dstvec[14], &dstvec[15], &d[0], &d[1], &d[2],
        &d[3], &d[4], &d[5], &d[6], &d[7]);
  
    for (int i = 0; i < 8; i++) {
      _mm_storeu_si128((__m128i *)(dst + i * stride), d[i]);
    }
  }
  
  static void dr_prediction_z3_4x16_avx2(uint8_t *dst, ptrdiff_t stride,
                                         const uint8_t *left, int upsample_left,
                                         int dy) {
    __m128i dstvec[4], d[16];
  
    dr_prediction_z1_HxW_internal_avx2(16, 4, dstvec, left, upsample_left, dy);
    transpose4x16_sse2(dstvec, d);
    for (int i = 0; i < 16; i++) {
      *(uint32_t *)(dst + stride * i) = _mm_cvtsi128_si32(d[i]);
    }
  }
  
  static void dr_prediction_z3_16x4_avx2(uint8_t *dst, ptrdiff_t stride,
                                         const uint8_t *left, int upsample_left,
                                         int dy) {
    __m128i dstvec[16], d[8];
  
    dr_prediction_z1_HxW_internal_avx2(4, 16, dstvec, left, upsample_left, dy);
    for (int i = 4; i < 8; i++) {
      d[i] = _mm_setzero_si128();
    }
    transpose16x8_8x16_sse2(
        &dstvec[0], &dstvec[1], &dstvec[2], &dstvec[3], &dstvec[4], &dstvec[5],
        &dstvec[6], &dstvec[7], &dstvec[8], &dstvec[9], &dstvec[10], &dstvec[11],
        &dstvec[12], &dstvec[13], &dstvec[14], &dstvec[15], &d[0], &d[1], &d[2],
        &d[3], &d[4], &d[5], &d[6], &d[7]);
  
    for (int i = 0; i < 4; i++) {
      _mm_storeu_si128((__m128i *)(dst + i * stride), d[i]);
    }
  }
  
  static void dr_prediction_z3_8x32_avx2(uint8_t *dst, ptrdiff_t stride,
                                         const uint8_t *left, int upsample_left,
                                         int dy) {
    __m256i dstvec[16], d[16];
  
    dr_prediction_z1_32xN_internal_avx2(8, dstvec, left, upsample_left, dy);
    for (int i = 8; i < 16; i++) {
      dstvec[i] = _mm256_setzero_si256();
    }
    transpose16x32_avx2(dstvec, d);
  
    for (int i = 0; i < 16; i++) {
      _mm_storel_epi64((__m128i *)(dst + i * stride),
                       _mm256_castsi256_si128(d[i]));
    }
    for (int i = 0; i < 16; i++) {
      _mm_storel_epi64((__m128i *)(dst + (i + 16) * stride),
                       _mm256_extracti128_si256(d[i], 1));
    }
  }
  
  static void dr_prediction_z3_32x8_avx2(uint8_t *dst, ptrdiff_t stride,
                                         const uint8_t *left, int upsample_left,
                                         int dy) {
    __m128i dstvec[32], d[16];
  
    dr_prediction_z1_HxW_internal_avx2(8, 32, dstvec, left, upsample_left, dy);
  
    transpose16x8_8x16_sse2(
        &dstvec[0], &dstvec[1], &dstvec[2], &dstvec[3], &dstvec[4], &dstvec[5],
        &dstvec[6], &dstvec[7], &dstvec[8], &dstvec[9], &dstvec[10], &dstvec[11],
        &dstvec[12], &dstvec[13], &dstvec[14], &dstvec[15], &d[0], &d[1], &d[2],
        &d[3], &d[4], &d[5], &d[6], &d[7]);
    transpose16x8_8x16_sse2(
        &dstvec[0 + 16], &dstvec[1 + 16], &dstvec[2 + 16], &dstvec[3 + 16],
        &dstvec[4 + 16], &dstvec[5 + 16], &dstvec[6 + 16], &dstvec[7 + 16],
        &dstvec[8 + 16], &dstvec[9 + 16], &dstvec[10 + 16], &dstvec[11 + 16],
        &dstvec[12 + 16], &dstvec[13 + 16], &dstvec[14 + 16], &dstvec[15 + 16],
        &d[0 + 8], &d[1 + 8], &d[2 + 8], &d[3 + 8], &d[4 + 8], &d[5 + 8],
        &d[6 + 8], &d[7 + 8]);
  
    for (int i = 0; i < 8; i++) {
      _mm_storeu_si128((__m128i *)(dst + i * stride), d[i]);
      _mm_storeu_si128((__m128i *)(dst + i * stride + 16), d[i + 8]);
    }
  }
  
  static void dr_prediction_z3_16x16_avx2(uint8_t *dst, ptrdiff_t stride,
                                          const uint8_t *left, int upsample_left,
                                          int dy) {
    __m128i dstvec[16], d[16];
  
    dr_prediction_z1_HxW_internal_avx2(16, 16, dstvec, left, upsample_left, dy);
    transpose16x16_sse2(dstvec, d);
  
    for (int i = 0; i < 16; i++) {
      _mm_storeu_si128((__m128i *)(dst + i * stride), d[i]);
    }
  }
  
  static void dr_prediction_z3_32x32_avx2(uint8_t *dst, ptrdiff_t stride,
                                          const uint8_t *left, int upsample_left,
                                          int dy) {
    __m256i dstvec[32], d[32];
  
    dr_prediction_z1_32xN_internal_avx2(32, dstvec, left, upsample_left, dy);
    transpose16x32_avx2(dstvec, d);
    transpose16x32_avx2(dstvec + 16, d + 16);
    for (int j = 0; j < 16; j++) {
      _mm_storeu_si128((__m128i *)(dst + j * stride),
                       _mm256_castsi256_si128(d[j]));
      _mm_storeu_si128((__m128i *)(dst + j * stride + 16),
                       _mm256_castsi256_si128(d[j + 16]));
    }
    for (int j = 0; j < 16; j++) {
      _mm_storeu_si128((__m128i *)(dst + (j + 16) * stride),
                       _mm256_extracti128_si256(d[j], 1));
      _mm_storeu_si128((__m128i *)(dst + (j + 16) * stride + 16),
                       _mm256_extracti128_si256(d[j + 16], 1));
    }
  }
  
  static void dr_prediction_z3_64x64_avx2(uint8_t *dst, ptrdiff_t stride,
                                          const uint8_t *left, int upsample_left,
                                          int dy) {
    DECLARE_ALIGNED(16, uint8_t, dstT[64 * 64]);
    dr_prediction_z1_64xN_avx2(64, dstT, 64, left, upsample_left, dy);
    transpose(dstT, 64, dst, stride, 64, 64);
  }
  
  static void dr_prediction_z3_16x32_avx2(uint8_t *dst, ptrdiff_t stride,
                                          const uint8_t *left, int upsample_left,
                                          int dy) {
    __m256i dstvec[16], d[16];
  
    dr_prediction_z1_32xN_internal_avx2(16, dstvec, left, upsample_left, dy);
    transpose16x32_avx2(dstvec, d);
    // store
    for (int j = 0; j < 16; j++) {
      _mm_storeu_si128((__m128i *)(dst + j * stride),
                       _mm256_castsi256_si128(d[j]));
      _mm_storeu_si128((__m128i *)(dst + (j + 16) * stride),
                       _mm256_extracti128_si256(d[j], 1));
    }
  }
  
  static void dr_prediction_z3_32x16_avx2(uint8_t *dst, ptrdiff_t stride,
                                          const uint8_t *left, int upsample_left,
                                          int dy) {
    __m128i dstvec[32], d[16];
  
    dr_prediction_z1_HxW_internal_avx2(16, 32, dstvec, left, upsample_left, dy);
    for (int i = 0; i < 32; i += 16) {
      transpose16x16_sse2((dstvec + i), d);
      for (int j = 0; j < 16; j++) {
        _mm_storeu_si128((__m128i *)(dst + j * stride + i), d[j]);
      }
    }
  }
  
  static void dr_prediction_z3_32x64_avx2(uint8_t *dst, ptrdiff_t stride,
                                          const uint8_t *left, int upsample_left,
                                          int dy) {
    uint8_t dstT[64 * 32];
    dr_prediction_z1_64xN_avx2(32, dstT, 64, left, upsample_left, dy);
    transpose(dstT, 64, dst, stride, 32, 64);
  }
  
  static void dr_prediction_z3_64x32_avx2(uint8_t *dst, ptrdiff_t stride,
                                          const uint8_t *left, int upsample_left,
                                          int dy) {
    uint8_t dstT[32 * 64];
    dr_prediction_z1_32xN_avx2(64, dstT, 32, left, upsample_left, dy);
    transpose(dstT, 32, dst, stride, 64, 32);
    return;
  }
  
  static void dr_prediction_z3_16x64_avx2(uint8_t *dst, ptrdiff_t stride,
                                          const uint8_t *left, int upsample_left,
                                          int dy) {
    uint8_t dstT[64 * 16];
    dr_prediction_z1_64xN_avx2(16, dstT, 64, left, upsample_left, dy);
    transpose(dstT, 64, dst, stride, 16, 64);
  }
  
  static void dr_prediction_z3_64x16_avx2(uint8_t *dst, ptrdiff_t stride,
                                          const uint8_t *left, int upsample_left,
                                          int dy) {
    __m128i dstvec[64], d[16];
  
    dr_prediction_z1_HxW_internal_avx2(16, 64, dstvec, left, upsample_left, dy);
    for (int i = 0; i < 64; i += 16) {
      transpose16x16_sse2((dstvec + i), d);
      for (int j = 0; j < 16; j++) {
        _mm_storeu_si128((__m128i *)(dst + j * stride + i), d[j]);
      }
    }
  }
  
  void av1_dr_prediction_z3_avx2(uint8_t *dst, ptrdiff_t stride, int bw, int bh,
                                 const uint8_t *above, const uint8_t *left,
                                 int upsample_left, int dx, int dy) {
    (void)above;
    (void)dx;
    assert(dx == 1);
    assert(dy > 0);
  
    if (bw == bh) {
      switch (bw) {
        case 4:
          dr_prediction_z3_4x4_avx2(dst, stride, left, upsample_left, dy);
          break;
        case 8:
          dr_prediction_z3_8x8_avx2(dst, stride, left, upsample_left, dy);
          break;
        case 16:
          dr_prediction_z3_16x16_avx2(dst, stride, left, upsample_left, dy);
          break;
        case 32:
          dr_prediction_z3_32x32_avx2(dst, stride, left, upsample_left, dy);
          break;
        case 64:
          dr_prediction_z3_64x64_avx2(dst, stride, left, upsample_left, dy);
          break;
      }
    } else {
      if (bw < bh) {
        if (bw + bw == bh) {
          switch (bw) {
            case 4:
              dr_prediction_z3_4x8_avx2(dst, stride, left, upsample_left, dy);
              break;
            case 8:
              dr_prediction_z3_8x16_avx2(dst, stride, left, upsample_left, dy);
              break;
            case 16:
              dr_prediction_z3_16x32_avx2(dst, stride, left, upsample_left, dy);
              break;
            case 32:
              dr_prediction_z3_32x64_avx2(dst, stride, left, upsample_left, dy);
              break;
          }
        } else {
          switch (bw) {
            case 4:
              dr_prediction_z3_4x16_avx2(dst, stride, left, upsample_left, dy);
              break;
            case 8:
              dr_prediction_z3_8x32_avx2(dst, stride, left, upsample_left, dy);
              break;
            case 16:
              dr_prediction_z3_16x64_avx2(dst, stride, left, upsample_left, dy);
              break;
          }
        }
      } else {
        if (bh + bh == bw) {
          switch (bh) {
            case 4:
              dr_prediction_z3_8x4_avx2(dst, stride, left, upsample_left, dy);
              break;
            case 8:
              dr_prediction_z3_16x8_avx2(dst, stride, left, upsample_left, dy);
              break;
            case 16:
              dr_prediction_z3_32x16_avx2(dst, stride, left, upsample_left, dy);
              break;
            case 32:
              dr_prediction_z3_64x32_avx2(dst, stride, left, upsample_left, dy);
              break;
          }
        } else {
          switch (bh) {
            case 4:
              dr_prediction_z3_16x4_avx2(dst, stride, left, upsample_left, dy);
              break;
            case 8:
              dr_prediction_z3_32x8_avx2(dst, stride, left, upsample_left, dy);
              break;
            case 16:
              dr_prediction_z3_64x16_avx2(dst, stride, left, upsample_left, dy);
              break;
          }
        }
      }
    }
  }
  