xref: /aosp_15_r20/external/libvpx/vpx_dsp/arm/highbd_intrapred_neon.c (revision fb1b10ab9aebc7c7068eedab379b749d7e3900be)

/*
 *  Copyright (c) 2016 The WebM project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#include <arm_neon.h>

#include "./vpx_config.h"
#include "./vpx_dsp_rtcd.h"
#include "sum_neon.h"
#include "vpx/vpx_integer.h"

//------------------------------------------------------------------------------
// DC 4x4

static INLINE uint16_t dc_sum_4(const uint16_t *ref) {
  const uint16x4_t ref_u16 = vld1_u16(ref);
  return horizontal_add_uint16x4(ref_u16);
}

static INLINE void dc_store_4x4(uint16_t *dst, ptrdiff_t stride,
                                const uint16x4_t dc) {
  int i;
  for (i = 0; i < 4; ++i, dst += stride) {
    vst1_u16(dst, dc);
  }
}

void vpx_highbd_dc_predictor_4x4_neon(uint16_t *dst, ptrdiff_t stride,
                                      const uint16_t *above,
                                      const uint16_t *left, int bd) {
  const uint16x4_t a = vld1_u16(above);
  const uint16x4_t l = vld1_u16(left);
  const uint16_t sum = horizontal_add_uint16x4(vadd_u16(a, l));
  const uint16x4_t dc = vrshr_n_u16(vdup_n_u16(sum), 3);
  (void)bd;
  dc_store_4x4(dst, stride, dc);
}

void vpx_highbd_dc_left_predictor_4x4_neon(uint16_t *dst, ptrdiff_t stride,
                                           const uint16_t *above,
                                           const uint16_t *left, int bd) {
  const uint16_t sum = dc_sum_4(left);
  const uint16x4_t dc = vrshr_n_u16(vdup_n_u16(sum), 2);
  (void)above;
  (void)bd;
  dc_store_4x4(dst, stride, dc);
}

void vpx_highbd_dc_top_predictor_4x4_neon(uint16_t *dst, ptrdiff_t stride,
                                          const uint16_t *above,
                                          const uint16_t *left, int bd) {
  const uint16_t sum = dc_sum_4(above);
  const uint16x4_t dc = vrshr_n_u16(vdup_n_u16(sum), 2);
  (void)left;
  (void)bd;
  dc_store_4x4(dst, stride, dc);
}

void vpx_highbd_dc_128_predictor_4x4_neon(uint16_t *dst, ptrdiff_t stride,
                                          const uint16_t *above,
                                          const uint16_t *left, int bd) {
  const uint16x4_t dc = vdup_n_u16(1 << (bd - 1));
  (void)above;
  (void)left;
  dc_store_4x4(dst, stride, dc);
}

//------------------------------------------------------------------------------
// DC 8x8

static INLINE uint16_t dc_sum_8(const uint16_t *ref) {
  const uint16x8_t ref_u16 = vld1q_u16(ref);
  return horizontal_add_uint16x8(ref_u16);
}

static INLINE void dc_store_8x8(uint16_t *dst, ptrdiff_t stride,
                                const uint16x8_t dc) {
  int i;
  for (i = 0; i < 8; ++i, dst += stride) {
    vst1q_u16(dst, dc);
  }
}

void vpx_highbd_dc_predictor_8x8_neon(uint16_t *dst, ptrdiff_t stride,
                                      const uint16_t *above,
                                      const uint16_t *left, int bd) {
  const uint16x8_t above_u16 = vld1q_u16(above);
  const uint16x8_t left_u16 = vld1q_u16(left);
  const uint16x8_t p0 = vaddq_u16(above_u16, left_u16);
  const uint16_t sum = horizontal_add_uint16x8(p0);
  const uint16x8_t dc = vrshrq_n_u16(vdupq_n_u16(sum), 4);
  (void)bd;
  dc_store_8x8(dst, stride, dc);
}

void vpx_highbd_dc_left_predictor_8x8_neon(uint16_t *dst, ptrdiff_t stride,
                                           const uint16_t *above,
                                           const uint16_t *left, int bd) {
  const uint16_t sum = dc_sum_8(left);
  const uint16x8_t dc = vrshrq_n_u16(vdupq_n_u16(sum), 3);
  (void)above;
  (void)bd;
  dc_store_8x8(dst, stride, dc);
}

void vpx_highbd_dc_top_predictor_8x8_neon(uint16_t *dst, ptrdiff_t stride,
                                          const uint16_t *above,
                                          const uint16_t *left, int bd) {
  const uint16_t sum = dc_sum_8(above);
  const uint16x8_t dc = vrshrq_n_u16(vdupq_n_u16(sum), 3);
  (void)left;
  (void)bd;
  dc_store_8x8(dst, stride, dc);
}

void vpx_highbd_dc_128_predictor_8x8_neon(uint16_t *dst, ptrdiff_t stride,
                                          const uint16_t *above,
                                          const uint16_t *left, int bd) {
  const uint16x8_t dc = vdupq_n_u16(1 << (bd - 1));
  (void)above;
  (void)left;
  dc_store_8x8(dst, stride, dc);
}

//------------------------------------------------------------------------------
// DC 16x16

static INLINE uint16_t dc_sum_16(const uint16_t *ref) {
  const uint16x8_t ref_u16_0 = vld1q_u16(ref + 0);
  const uint16x8_t ref_u16_1 = vld1q_u16(ref + 8);
  const uint16x8_t p0 = vaddq_u16(ref_u16_0, ref_u16_1);
  return horizontal_add_uint16x8(p0);
}

static INLINE void dc_store_16x16(uint16_t *dst, ptrdiff_t stride,
                                  const uint16x8_t dc) {
  int i;
  for (i = 0; i < 16; ++i, dst += stride) {
    vst1q_u16(dst + 0, dc);
    vst1q_u16(dst + 8, dc);
  }
}

void vpx_highbd_dc_predictor_16x16_neon(uint16_t *dst, ptrdiff_t stride,
                                        const uint16_t *above,
                                        const uint16_t *left, int bd) {
  const uint16x8_t a0 = vld1q_u16(above + 0);
  const uint16x8_t a1 = vld1q_u16(above + 8);
  const uint16x8_t l0 = vld1q_u16(left + 0);
  const uint16x8_t l1 = vld1q_u16(left + 8);
  const uint16x8_t pa = vaddq_u16(a0, a1);
  const uint16x8_t pl = vaddq_u16(l0, l1);
  const uint16x8_t pal0 = vaddq_u16(pa, pl);
  const uint32_t sum = horizontal_add_uint16x8(pal0);
  const uint16x8_t dc = vdupq_lane_u16(vrshrn_n_u32(vdupq_n_u32(sum), 5), 0);
  (void)bd;
  dc_store_16x16(dst, stride, dc);
}

void vpx_highbd_dc_left_predictor_16x16_neon(uint16_t *dst, ptrdiff_t stride,
                                             const uint16_t *above,
                                             const uint16_t *left, int bd) {
  const uint16_t sum = dc_sum_16(left);
  const uint16x8_t dc = vrshrq_n_u16(vdupq_n_u16(sum), 4);
  (void)above;
  (void)bd;
  dc_store_16x16(dst, stride, dc);
}

void vpx_highbd_dc_top_predictor_16x16_neon(uint16_t *dst, ptrdiff_t stride,
                                            const uint16_t *above,
                                            const uint16_t *left, int bd) {
  const uint16_t sum = dc_sum_16(above);
  const uint16x8_t dc = vrshrq_n_u16(vdupq_n_u16(sum), 4);
  (void)left;
  (void)bd;
  dc_store_16x16(dst, stride, dc);
}

void vpx_highbd_dc_128_predictor_16x16_neon(uint16_t *dst, ptrdiff_t stride,
                                            const uint16_t *above,
                                            const uint16_t *left, int bd) {
  const uint16x8_t dc = vdupq_n_u16(1 << (bd - 1));
  (void)above;
  (void)left;
  dc_store_16x16(dst, stride, dc);
}

//------------------------------------------------------------------------------
// DC 32x32

static INLINE uint32_t dc_sum_32(const uint16_t *ref) {
  const uint16x8_t r0 = vld1q_u16(ref + 0);
  const uint16x8_t r1 = vld1q_u16(ref + 8);
  const uint16x8_t r2 = vld1q_u16(ref + 16);
  const uint16x8_t r3 = vld1q_u16(ref + 24);
  const uint16x8_t p0 = vaddq_u16(r0, r1);
  const uint16x8_t p1 = vaddq_u16(r2, r3);
  const uint16x8_t p2 = vaddq_u16(p0, p1);
  return horizontal_add_uint16x8(p2);
}

static INLINE void dc_store_32x32(uint16_t *dst, ptrdiff_t stride,
                                  const uint16x8_t dc) {
  int i;
  for (i = 0; i < 32; ++i) {
    vst1q_u16(dst + 0, dc);
    vst1q_u16(dst + 8, dc);
    vst1q_u16(dst + 16, dc);
    vst1q_u16(dst + 24, dc);
    dst += stride;
  }
}

void vpx_highbd_dc_predictor_32x32_neon(uint16_t *dst, ptrdiff_t stride,
                                        const uint16_t *above,
                                        const uint16_t *left, int bd) {
  const uint16x8_t a0 = vld1q_u16(above + 0);
  const uint16x8_t a1 = vld1q_u16(above + 8);
  const uint16x8_t a2 = vld1q_u16(above + 16);
  const uint16x8_t a3 = vld1q_u16(above + 24);
  const uint16x8_t l0 = vld1q_u16(left + 0);
  const uint16x8_t l1 = vld1q_u16(left + 8);
  const uint16x8_t l2 = vld1q_u16(left + 16);
  const uint16x8_t l3 = vld1q_u16(left + 24);
  const uint16x8_t pa0 = vaddq_u16(a0, a1);
  const uint16x8_t pa1 = vaddq_u16(a2, a3);
  const uint16x8_t pl0 = vaddq_u16(l0, l1);
  const uint16x8_t pl1 = vaddq_u16(l2, l3);
  const uint16x8_t pa = vaddq_u16(pa0, pa1);
  const uint16x8_t pl = vaddq_u16(pl0, pl1);
  const uint16x8_t pal0 = vaddq_u16(pa, pl);
  const uint32_t sum = horizontal_add_uint16x8(pal0);
  const uint16x8_t dc = vdupq_lane_u16(vrshrn_n_u32(vdupq_n_u32(sum), 6), 0);
  (void)bd;
  dc_store_32x32(dst, stride, dc);
}

void vpx_highbd_dc_left_predictor_32x32_neon(uint16_t *dst, ptrdiff_t stride,
                                             const uint16_t *above,
                                             const uint16_t *left, int bd) {
  const uint32_t sum = dc_sum_32(left);
  const uint16x8_t dc = vdupq_lane_u16(vrshrn_n_u32(vdupq_n_u32(sum), 5), 0);
  (void)above;
  (void)bd;
  dc_store_32x32(dst, stride, dc);
}

void vpx_highbd_dc_top_predictor_32x32_neon(uint16_t *dst, ptrdiff_t stride,
                                            const uint16_t *above,
                                            const uint16_t *left, int bd) {
  const uint32_t sum = dc_sum_32(above);
  const uint16x8_t dc = vdupq_lane_u16(vrshrn_n_u32(vdupq_n_u32(sum), 5), 0);
  (void)left;
  (void)bd;
  dc_store_32x32(dst, stride, dc);
}

void vpx_highbd_dc_128_predictor_32x32_neon(uint16_t *dst, ptrdiff_t stride,
                                            const uint16_t *above,
                                            const uint16_t *left, int bd) {
  const uint16x8_t dc = vdupq_n_u16(1 << (bd - 1));
  (void)above;
  (void)left;
  dc_store_32x32(dst, stride, dc);
}

// -----------------------------------------------------------------------------

void vpx_highbd_d45_predictor_4x4_neon(uint16_t *dst, ptrdiff_t stride,
                                       const uint16_t *above,
                                       const uint16_t *left, int bd) {
  uint16x8_t a0, a1, a2, d0;
  uint16_t a7;
  (void)left;
  (void)bd;

  a0 = vld1q_u16(above);
  a7 = above[7];

  // [ above[1], ..., above[6], x, x ]
  a1 = vextq_u16(a0, a0, 1);
  // [ above[2], ..., above[7], x, x ]
  a2 = vextq_u16(a0, a0, 2);

  // d0[0] = AVG3(above[0], above[1], above[2]);
  // ...
  // d0[5] = AVG3(above[5], above[6], above[7]);
  // d0[6] = x (don't care)
  // d0[7] = x (don't care)
  d0 = vrhaddq_u16(vhaddq_u16(a0, a2), a1);

  // We want:
  // stride=0 [ d0[0], d0[1], d0[2],    d0[3] ]
  // stride=1 [ d0[1], d0[2], d0[3],    d0[4] ]
  // stride=2 [ d0[2], d0[3], d0[4],    d0[5] ]
  // stride=2 [ d0[3], d0[4], d0[5], above[7] ]
  vst1_u16(dst + 0 * stride, vget_low_u16(d0));
  vst1_u16(dst + 1 * stride, vget_low_u16(vextq_u16(d0, d0, 1)));
  vst1_u16(dst + 2 * stride, vget_low_u16(vextq_u16(d0, d0, 2)));
  vst1_u16(dst + 3 * stride, vget_low_u16(vextq_u16(d0, d0, 3)));

  // We stored d0[6] above, so fixup into above[7].
  dst[3 * stride + 3] = a7;
}

void vpx_highbd_d45_predictor_8x8_neon(uint16_t *dst, ptrdiff_t stride,
                                       const uint16_t *above,
                                       const uint16_t *left, int bd) {
  uint16x8_t ax0, a0, a1, a7, d0;
  (void)left;
  (void)bd;

  a0 = vld1q_u16(above + 0);
  a1 = vld1q_u16(above + 1);
  a7 = vld1q_dup_u16(above + 7);

  // We want to calculate the AVG3 result in lanes 1-7 inclusive so we can
  // shift in above[7] later, so shift a0 across by one to get the right
  // inputs:
  // [ x, above[0], ... , above[6] ]
  ax0 = vextq_u16(a0, a0, 7);

  // d0[0] = x (don't care)
  // d0[1] = AVG3(above[0], above[1], above[2]);
  // ...
  // d0[7] = AVG3(above[6], above[7], above[8]);
  d0 = vrhaddq_u16(vhaddq_u16(ax0, a1), a0);

  // Undo the earlier ext, incrementally shift in duplicates of above[7].
  vst1q_u16(dst + 0 * stride, vextq_u16(d0, a7, 1));
  vst1q_u16(dst + 1 * stride, vextq_u16(d0, a7, 2));
  vst1q_u16(dst + 2 * stride, vextq_u16(d0, a7, 3));
  vst1q_u16(dst + 3 * stride, vextq_u16(d0, a7, 4));
  vst1q_u16(dst + 4 * stride, vextq_u16(d0, a7, 5));
  vst1q_u16(dst + 5 * stride, vextq_u16(d0, a7, 6));
  vst1q_u16(dst + 6 * stride, vextq_u16(d0, a7, 7));
  vst1q_u16(dst + 7 * stride, a7);
}

void vpx_highbd_d45_predictor_16x16_neon(uint16_t *dst, ptrdiff_t stride,
                                         const uint16_t *above,
                                         const uint16_t *left, int bd) {
  uint16x8_t ax0, a0, a1, a7, a8, a9, a15, d0[2];
  (void)left;
  (void)bd;

  a0 = vld1q_u16(above + 0);
  a1 = vld1q_u16(above + 1);
  a7 = vld1q_u16(above + 7);
  a8 = vld1q_u16(above + 8);
  a9 = vld1q_u16(above + 9);
  a15 = vld1q_dup_u16(above + 15);

  // [ x, above[0], ... , above[6] ]
  ax0 = vextq_u16(a0, a0, 7);

  // We have one unused lane here to leave room to shift in above[15] in the
  // last lane:
  // d0[0][1] = x (don't care)
  // d0[0][1] = AVG3(above[0], above[1], above[2]);
  // ...
  // d0[0][7] = AVG3(above[6], above[7], above[8]);
  // d0[1][0] = AVG3(above[7], above[8], above[9]);
  // ...
  // d0[1][7] = AVG3(above[14], above[15], above[16]);
  d0[0] = vrhaddq_u16(vhaddq_u16(ax0, a1), a0);
  d0[1] = vrhaddq_u16(vhaddq_u16(a7, a9), a8);

  // Incrementally shift in duplicates of above[15].
  vst1q_u16(dst + 0 * stride + 0, vextq_u16(d0[0], d0[1], 1));
  vst1q_u16(dst + 0 * stride + 8, vextq_u16(d0[1], a15, 1));
  vst1q_u16(dst + 1 * stride + 0, vextq_u16(d0[0], d0[1], 2));
  vst1q_u16(dst + 1 * stride + 8, vextq_u16(d0[1], a15, 2));
  vst1q_u16(dst + 2 * stride + 0, vextq_u16(d0[0], d0[1], 3));
  vst1q_u16(dst + 2 * stride + 8, vextq_u16(d0[1], a15, 3));
  vst1q_u16(dst + 3 * stride + 0, vextq_u16(d0[0], d0[1], 4));
  vst1q_u16(dst + 3 * stride + 8, vextq_u16(d0[1], a15, 4));
  vst1q_u16(dst + 4 * stride + 0, vextq_u16(d0[0], d0[1], 5));
  vst1q_u16(dst + 4 * stride + 8, vextq_u16(d0[1], a15, 5));
  vst1q_u16(dst + 5 * stride + 0, vextq_u16(d0[0], d0[1], 6));
  vst1q_u16(dst + 5 * stride + 8, vextq_u16(d0[1], a15, 6));
  vst1q_u16(dst + 6 * stride + 0, vextq_u16(d0[0], d0[1], 7));
  vst1q_u16(dst + 6 * stride + 8, vextq_u16(d0[1], a15, 7));
  vst1q_u16(dst + 7 * stride + 0, d0[1]);
  vst1q_u16(dst + 7 * stride + 8, a15);

  vst1q_u16(dst + 8 * stride + 0, vextq_u16(d0[1], a15, 1));
  vst1q_u16(dst + 8 * stride + 8, a15);
  vst1q_u16(dst + 9 * stride + 0, vextq_u16(d0[1], a15, 2));
  vst1q_u16(dst + 9 * stride + 8, a15);
  vst1q_u16(dst + 10 * stride + 0, vextq_u16(d0[1], a15, 3));
  vst1q_u16(dst + 10 * stride + 8, a15);
  vst1q_u16(dst + 11 * stride + 0, vextq_u16(d0[1], a15, 4));
  vst1q_u16(dst + 11 * stride + 8, a15);
  vst1q_u16(dst + 12 * stride + 0, vextq_u16(d0[1], a15, 5));
  vst1q_u16(dst + 12 * stride + 8, a15);
  vst1q_u16(dst + 13 * stride + 0, vextq_u16(d0[1], a15, 6));
  vst1q_u16(dst + 13 * stride + 8, a15);
  vst1q_u16(dst + 14 * stride + 0, vextq_u16(d0[1], a15, 7));
  vst1q_u16(dst + 14 * stride + 8, a15);
  vst1q_u16(dst + 15 * stride + 0, a15);
  vst1q_u16(dst + 15 * stride + 8, a15);
}

void vpx_highbd_d45_predictor_32x32_neon(uint16_t *dst, ptrdiff_t stride,
                                         const uint16_t *above,
                                         const uint16_t *left, int bd) {
  uint16x8_t ax0, a0, a1, a7, a8, a9, a15, a16, a17, a23, a24, a25, a31, d0[4];
  int i;
  (void)left;
  (void)bd;

  a0 = vld1q_u16(above + 0);
  a1 = vld1q_u16(above + 1);
  a7 = vld1q_u16(above + 7);
  a8 = vld1q_u16(above + 8);
  a9 = vld1q_u16(above + 9);
  a15 = vld1q_u16(above + 15);
  a16 = vld1q_u16(above + 16);
  a17 = vld1q_u16(above + 17);
  a23 = vld1q_u16(above + 23);
  a24 = vld1q_u16(above + 24);
  a25 = vld1q_u16(above + 25);
  a31 = vld1q_dup_u16(above + 31);

  // [ x, above[0], ... , above[6] ]
  ax0 = vextq_u16(a0, a0, 7);

  d0[0] = vrhaddq_u16(vhaddq_u16(ax0, a1), a0);
  d0[1] = vrhaddq_u16(vhaddq_u16(a7, a9), a8);
  d0[2] = vrhaddq_u16(vhaddq_u16(a15, a17), a16);
  d0[3] = vrhaddq_u16(vhaddq_u16(a23, a25), a24);

  for (i = 0; i < 32; ++i) {
    d0[0] = vextq_u16(d0[0], d0[1], 1);
    d0[1] = vextq_u16(d0[1], d0[2], 1);
    d0[2] = vextq_u16(d0[2], d0[3], 1);
    d0[3] = vextq_u16(d0[3], a31, 1);
    vst1q_u16(dst + 0, d0[0]);
    vst1q_u16(dst + 8, d0[1]);
    vst1q_u16(dst + 16, d0[2]);
    vst1q_u16(dst + 24, d0[3]);
    dst += stride;
  }
}

// -----------------------------------------------------------------------------

void vpx_highbd_d63_predictor_4x4_neon(uint16_t *dst, ptrdiff_t stride,
                                       const uint16_t *above,
                                       const uint16_t *left, int bd) {
  uint16x4_t a0, a1, a2, a3, d0, d1, d2, d3;
  (void)left;
  (void)bd;

  a0 = vld1_u16(above + 0);
  a1 = vld1_u16(above + 1);
  a2 = vld1_u16(above + 2);
  a3 = vld1_u16(above + 3);

  d0 = vrhadd_u16(a0, a1);
  d1 = vrhadd_u16(vhadd_u16(a0, a2), a1);
  d2 = vrhadd_u16(a1, a2);
  d3 = vrhadd_u16(vhadd_u16(a1, a3), a2);

  // Note that here we are performing a full avg calculation for the final
  // elements rather than storing a duplicate of above[3], which differs
  // (correctly) from the general scheme employed by the bs={8,16,32}
  // implementations in order to match the original C implementation.
  vst1_u16(dst + 0 * stride, d0);
  vst1_u16(dst + 1 * stride, d1);
  vst1_u16(dst + 2 * stride, d2);
  vst1_u16(dst + 3 * stride, d3);
}

void vpx_highbd_d63_predictor_8x8_neon(uint16_t *dst, ptrdiff_t stride,
                                       const uint16_t *above,
                                       const uint16_t *left, int bd) {
  uint16x8_t a0, a1, a2, a7, d0, d1, d0_ext, d1_ext;
  (void)left;
  (void)bd;

  a0 = vld1q_u16(above + 0);
  a1 = vld1q_u16(above + 1);
  a2 = vld1q_u16(above + 2);
  a7 = vld1q_dup_u16(above + 7);

  d0 = vrhaddq_u16(a0, a1);
  d1 = vrhaddq_u16(vhaddq_u16(a0, a2), a1);

  // We want to store:
  // stride=0 [ d0[0], d0[1], d0[2], d0[3], d0[4], d0[5], d0[6], d0[7] ]
  // stride=1 [ d1[0], d1[1], d1[2], d1[3], d1[4], d1[5], d1[6], d1[7] ]
  // stride=2 [ d0[1], d0[2], d0[3], d0[4], d0[5], d0[6],  a[7],  a[7] ]
  // stride=3 [ d1[1], d1[2], d1[3], d1[4], d1[5], d1[6],  a[7],  a[7] ]
  // stride=4 [ d0[2], d0[3], d0[4], d0[5], d0[6],  a[7],  a[7],  a[7] ]
  // stride=5 [ d1[2], d1[3], d1[4], d1[5], d1[6],  a[7],  a[7],  a[7] ]
  // stride=6 [ d0[3], d0[4], d0[5], d0[6],  a[7],  a[7],  a[7],  a[7] ]
  // stride=7 [ d1[3], d1[4], d1[5], d1[6],  a[7],  a[7],  a[7],  a[7] ]
  // Note in particular that d0[7] and d1[7] are only ever referenced in the
  // stride=0 and stride=1 cases respectively, and in later strides are
  // replaced by a copy of above[7]. These are equivalent if for i>7,
  // above[i]==above[7], however that is not always the case.

  // Strip out d0[7] and d1[7] so that we can replace it with an additional
  // copy of above[7], the first vector here doesn't matter so just reuse
  // d0/d1.
  d0_ext = vextq_u16(d0, d0, 7);
  d1_ext = vextq_u16(d1, d1, 7);

  // Shuffle in duplicates of above[7] and store.
  vst1q_u16(dst + 0 * stride, d0);
  vst1q_u16(dst + 1 * stride, d1);
  vst1q_u16(dst + 2 * stride, vextq_u16(d0_ext, a7, 2));
  vst1q_u16(dst + 3 * stride, vextq_u16(d1_ext, a7, 2));
  vst1q_u16(dst + 4 * stride, vextq_u16(d0_ext, a7, 3));
  vst1q_u16(dst + 5 * stride, vextq_u16(d1_ext, a7, 3));
  vst1q_u16(dst + 6 * stride, vextq_u16(d0_ext, a7, 4));
  vst1q_u16(dst + 7 * stride, vextq_u16(d1_ext, a7, 4));
}

void vpx_highbd_d63_predictor_16x16_neon(uint16_t *dst, ptrdiff_t stride,
                                         const uint16_t *above,
                                         const uint16_t *left, int bd) {
  // See vpx_highbd_d63_predictor_8x8_neon for details on the implementation.
  uint16x8_t a0, a1, a2, a8, a9, a10, a15, d0[2], d1[2], d0_ext, d1_ext;
  (void)left;
  (void)bd;

  a0 = vld1q_u16(above + 0);
  a1 = vld1q_u16(above + 1);
  a2 = vld1q_u16(above + 2);
  a8 = vld1q_u16(above + 8);
  a9 = vld1q_u16(above + 9);
  a10 = vld1q_u16(above + 10);
  a15 = vld1q_dup_u16(above + 15);

  d0[0] = vrhaddq_u16(a0, a1);
  d0[1] = vrhaddq_u16(a8, a9);
  d1[0] = vrhaddq_u16(vhaddq_u16(a0, a2), a1);
  d1[1] = vrhaddq_u16(vhaddq_u16(a8, a10), a9);

  // Strip out the final element of d0/d1 so that we can replace it with an
  // additional copy of above[7], the first vector here doesn't matter so just
  // reuse the same vector.
  d0_ext = vextq_u16(d0[1], d0[1], 7);
  d1_ext = vextq_u16(d1[1], d1[1], 7);

  // Shuffle in duplicates of above[7] and store. Note that cases involving
  // {d0,d1}_ext require an extra shift to undo the shifting out of the final
  // element from above.
  vst1q_u16(dst + 0 * stride + 0, d0[0]);
  vst1q_u16(dst + 0 * stride + 8, d0[1]);
  vst1q_u16(dst + 1 * stride + 0, d1[0]);
  vst1q_u16(dst + 1 * stride + 8, d1[1]);
  vst1q_u16(dst + 2 * stride + 0, vextq_u16(d0[0], d0[1], 1));
  vst1q_u16(dst + 2 * stride + 8, vextq_u16(d0_ext, a15, 2));
  vst1q_u16(dst + 3 * stride + 0, vextq_u16(d1[0], d1[1], 1));
  vst1q_u16(dst + 3 * stride + 8, vextq_u16(d1_ext, a15, 2));
  vst1q_u16(dst + 4 * stride + 0, vextq_u16(d0[0], d0[1], 2));
  vst1q_u16(dst + 4 * stride + 8, vextq_u16(d0_ext, a15, 3));
  vst1q_u16(dst + 5 * stride + 0, vextq_u16(d1[0], d1[1], 2));
  vst1q_u16(dst + 5 * stride + 8, vextq_u16(d1_ext, a15, 3));
  vst1q_u16(dst + 6 * stride + 0, vextq_u16(d0[0], d0[1], 3));
  vst1q_u16(dst + 6 * stride + 8, vextq_u16(d0_ext, a15, 4));
  vst1q_u16(dst + 7 * stride + 0, vextq_u16(d1[0], d1[1], 3));
  vst1q_u16(dst + 7 * stride + 8, vextq_u16(d1_ext, a15, 4));
  vst1q_u16(dst + 8 * stride + 0, vextq_u16(d0[0], d0[1], 4));
  vst1q_u16(dst + 8 * stride + 8, vextq_u16(d0_ext, a15, 5));
  vst1q_u16(dst + 9 * stride + 0, vextq_u16(d1[0], d1[1], 4));
  vst1q_u16(dst + 9 * stride + 8, vextq_u16(d1_ext, a15, 5));
  vst1q_u16(dst + 10 * stride + 0, vextq_u16(d0[0], d0[1], 5));
  vst1q_u16(dst + 10 * stride + 8, vextq_u16(d0_ext, a15, 6));
  vst1q_u16(dst + 11 * stride + 0, vextq_u16(d1[0], d1[1], 5));
  vst1q_u16(dst + 11 * stride + 8, vextq_u16(d1_ext, a15, 6));
  vst1q_u16(dst + 12 * stride + 0, vextq_u16(d0[0], d0[1], 6));
  vst1q_u16(dst + 12 * stride + 8, vextq_u16(d0_ext, a15, 7));
  vst1q_u16(dst + 13 * stride + 0, vextq_u16(d1[0], d1[1], 6));
  vst1q_u16(dst + 13 * stride + 8, vextq_u16(d1_ext, a15, 7));
  vst1q_u16(dst + 14 * stride + 0, vextq_u16(d0[0], d0[1], 7));
  vst1q_u16(dst + 14 * stride + 8, a15);
  vst1q_u16(dst + 15 * stride + 0, vextq_u16(d1[0], d1[1], 7));
  vst1q_u16(dst + 15 * stride + 8, a15);
}

void vpx_highbd_d63_predictor_32x32_neon(uint16_t *dst, ptrdiff_t stride,
                                         const uint16_t *above,
                                         const uint16_t *left, int bd) {
  // See vpx_highbd_d63_predictor_8x8_neon for details on the implementation.
  uint16x8_t a0, a1, a2, a8, a9, a10, a16, a17, a18, a24, a25, a26, a31, d0[4],
      d1[4], d0_ext, d1_ext;
  (void)left;
  (void)bd;

  a0 = vld1q_u16(above + 0);
  a1 = vld1q_u16(above + 1);
  a2 = vld1q_u16(above + 2);
  a8 = vld1q_u16(above + 8);
  a9 = vld1q_u16(above + 9);
  a10 = vld1q_u16(above + 10);
  a16 = vld1q_u16(above + 16);
  a17 = vld1q_u16(above + 17);
  a18 = vld1q_u16(above + 18);
  a24 = vld1q_u16(above + 24);
  a25 = vld1q_u16(above + 25);
  a26 = vld1q_u16(above + 26);
  a31 = vld1q_dup_u16(above + 31);

  d0[0] = vrhaddq_u16(a0, a1);
  d0[1] = vrhaddq_u16(a8, a9);
  d0[2] = vrhaddq_u16(a16, a17);
  d0[3] = vrhaddq_u16(a24, a25);
  d1[0] = vrhaddq_u16(vhaddq_u16(a0, a2), a1);
  d1[1] = vrhaddq_u16(vhaddq_u16(a8, a10), a9);
  d1[2] = vrhaddq_u16(vhaddq_u16(a16, a18), a17);
  d1[3] = vrhaddq_u16(vhaddq_u16(a24, a26), a25);

  // Strip out the final element of d0/d1 so that we can replace it with an
  // additional copy of above[7], the first vector here doesn't matter so just
  // reuse the same vector.
  d0_ext = vextq_u16(d0[3], d0[3], 7);
  d1_ext = vextq_u16(d1[3], d1[3], 7);

  // Shuffle in duplicates of above[7] and store. Note that cases involving
  // {d0,d1}_ext require an extra shift to undo the shifting out of the final
  // element from above.

  vst1q_u16(dst + 0 * stride + 0, d0[0]);
  vst1q_u16(dst + 0 * stride + 8, d0[1]);
  vst1q_u16(dst + 0 * stride + 16, d0[2]);
  vst1q_u16(dst + 0 * stride + 24, d0[3]);
  vst1q_u16(dst + 1 * stride + 0, d1[0]);
  vst1q_u16(dst + 1 * stride + 8, d1[1]);
  vst1q_u16(dst + 1 * stride + 16, d1[2]);
  vst1q_u16(dst + 1 * stride + 24, d1[3]);

  vst1q_u16(dst + 2 * stride + 0, vextq_u16(d0[0], d0[1], 1));
  vst1q_u16(dst + 2 * stride + 8, vextq_u16(d0[1], d0[2], 1));
  vst1q_u16(dst + 2 * stride + 16, vextq_u16(d0[2], d0[3], 1));
  vst1q_u16(dst + 2 * stride + 24, vextq_u16(d0_ext, a31, 2));
  vst1q_u16(dst + 3 * stride + 0, vextq_u16(d1[0], d1[1], 1));
  vst1q_u16(dst + 3 * stride + 8, vextq_u16(d1[1], d1[2], 1));
  vst1q_u16(dst + 3 * stride + 16, vextq_u16(d1[2], d1[3], 1));
  vst1q_u16(dst + 3 * stride + 24, vextq_u16(d1_ext, a31, 2));

  vst1q_u16(dst + 4 * stride + 0, vextq_u16(d0[0], d0[1], 2));
  vst1q_u16(dst + 4 * stride + 8, vextq_u16(d0[1], d0[2], 2));
  vst1q_u16(dst + 4 * stride + 16, vextq_u16(d0[2], d0[3], 2));
  vst1q_u16(dst + 4 * stride + 24, vextq_u16(d0_ext, a31, 3));
  vst1q_u16(dst + 5 * stride + 0, vextq_u16(d1[0], d1[1], 2));
  vst1q_u16(dst + 5 * stride + 8, vextq_u16(d1[1], d1[2], 2));
  vst1q_u16(dst + 5 * stride + 16, vextq_u16(d1[2], d1[3], 2));
  vst1q_u16(dst + 5 * stride + 24, vextq_u16(d1_ext, a31, 3));

  vst1q_u16(dst + 6 * stride + 0, vextq_u16(d0[0], d0[1], 3));
  vst1q_u16(dst + 6 * stride + 8, vextq_u16(d0[1], d0[2], 3));
  vst1q_u16(dst + 6 * stride + 16, vextq_u16(d0[2], d0[3], 3));
  vst1q_u16(dst + 6 * stride + 24, vextq_u16(d0_ext, a31, 4));
  vst1q_u16(dst + 7 * stride + 0, vextq_u16(d1[0], d1[1], 3));
  vst1q_u16(dst + 7 * stride + 8, vextq_u16(d1[1], d1[2], 3));
  vst1q_u16(dst + 7 * stride + 16, vextq_u16(d1[2], d1[3], 3));
  vst1q_u16(dst + 7 * stride + 24, vextq_u16(d1_ext, a31, 4));

  vst1q_u16(dst + 8 * stride + 0, vextq_u16(d0[0], d0[1], 4));
  vst1q_u16(dst + 8 * stride + 8, vextq_u16(d0[1], d0[2], 4));
  vst1q_u16(dst + 8 * stride + 16, vextq_u16(d0[2], d0[3], 4));
  vst1q_u16(dst + 8 * stride + 24, vextq_u16(d0_ext, a31, 5));
  vst1q_u16(dst + 9 * stride + 0, vextq_u16(d1[0], d1[1], 4));
  vst1q_u16(dst + 9 * stride + 8, vextq_u16(d1[1], d1[2], 4));
  vst1q_u16(dst + 9 * stride + 16, vextq_u16(d1[2], d1[3], 4));
  vst1q_u16(dst + 9 * stride + 24, vextq_u16(d1_ext, a31, 5));

  vst1q_u16(dst + 10 * stride + 0, vextq_u16(d0[0], d0[1], 5));
  vst1q_u16(dst + 10 * stride + 8, vextq_u16(d0[1], d0[2], 5));
  vst1q_u16(dst + 10 * stride + 16, vextq_u16(d0[2], d0[3], 5));
  vst1q_u16(dst + 10 * stride + 24, vextq_u16(d0_ext, a31, 6));
  vst1q_u16(dst + 11 * stride + 0, vextq_u16(d1[0], d1[1], 5));
  vst1q_u16(dst + 11 * stride + 8, vextq_u16(d1[1], d1[2], 5));
  vst1q_u16(dst + 11 * stride + 16, vextq_u16(d1[2], d1[3], 5));
  vst1q_u16(dst + 11 * stride + 24, vextq_u16(d1_ext, a31, 6));

  vst1q_u16(dst + 12 * stride + 0, vextq_u16(d0[0], d0[1], 6));
  vst1q_u16(dst + 12 * stride + 8, vextq_u16(d0[1], d0[2], 6));
  vst1q_u16(dst + 12 * stride + 16, vextq_u16(d0[2], d0[3], 6));
  vst1q_u16(dst + 12 * stride + 24, vextq_u16(d0_ext, a31, 7));
  vst1q_u16(dst + 13 * stride + 0, vextq_u16(d1[0], d1[1], 6));
  vst1q_u16(dst + 13 * stride + 8, vextq_u16(d1[1], d1[2], 6));
  vst1q_u16(dst + 13 * stride + 16, vextq_u16(d1[2], d1[3], 6));
  vst1q_u16(dst + 13 * stride + 24, vextq_u16(d1_ext, a31, 7));

  vst1q_u16(dst + 14 * stride + 0, vextq_u16(d0[0], d0[1], 7));
  vst1q_u16(dst + 14 * stride + 8, vextq_u16(d0[1], d0[2], 7));
  vst1q_u16(dst + 14 * stride + 16, vextq_u16(d0[2], d0[3], 7));
  vst1q_u16(dst + 14 * stride + 24, a31);
  vst1q_u16(dst + 15 * stride + 0, vextq_u16(d1[0], d1[1], 7));
  vst1q_u16(dst + 15 * stride + 8, vextq_u16(d1[1], d1[2], 7));
  vst1q_u16(dst + 15 * stride + 16, vextq_u16(d1[2], d1[3], 7));
  vst1q_u16(dst + 15 * stride + 24, a31);

  vst1q_u16(dst + 16 * stride + 0, d0[1]);
  vst1q_u16(dst + 16 * stride + 8, d0[2]);
  vst1q_u16(dst + 16 * stride + 16, vextq_u16(d0_ext, a31, 1));
  vst1q_u16(dst + 16 * stride + 24, a31);
  vst1q_u16(dst + 17 * stride + 0, d1[1]);
  vst1q_u16(dst + 17 * stride + 8, d1[2]);
  vst1q_u16(dst + 17 * stride + 16, vextq_u16(d1_ext, a31, 1));
  vst1q_u16(dst + 17 * stride + 24, a31);

  vst1q_u16(dst + 18 * stride + 0, vextq_u16(d0[1], d0[2], 1));
  vst1q_u16(dst + 18 * stride + 8, vextq_u16(d0[2], d0[3], 1));
  vst1q_u16(dst + 18 * stride + 16, vextq_u16(d0_ext, a31, 2));
  vst1q_u16(dst + 18 * stride + 24, a31);
  vst1q_u16(dst + 19 * stride + 0, vextq_u16(d1[1], d1[2], 1));
  vst1q_u16(dst + 19 * stride + 8, vextq_u16(d1[2], d1[3], 1));
  vst1q_u16(dst + 19 * stride + 16, vextq_u16(d1_ext, a31, 2));
  vst1q_u16(dst + 19 * stride + 24, a31);

  vst1q_u16(dst + 20 * stride + 0, vextq_u16(d0[1], d0[2], 2));
  vst1q_u16(dst + 20 * stride + 8, vextq_u16(d0[2], d0[3], 2));
  vst1q_u16(dst + 20 * stride + 16, vextq_u16(d0_ext, a31, 3));
  vst1q_u16(dst + 20 * stride + 24, a31);
  vst1q_u16(dst + 21 * stride + 0, vextq_u16(d1[1], d1[2], 2));
  vst1q_u16(dst + 21 * stride + 8, vextq_u16(d1[2], d1[3], 2));
  vst1q_u16(dst + 21 * stride + 16, vextq_u16(d1_ext, a31, 3));
  vst1q_u16(dst + 21 * stride + 24, a31);

  vst1q_u16(dst + 22 * stride + 0, vextq_u16(d0[1], d0[2], 3));
  vst1q_u16(dst + 22 * stride + 8, vextq_u16(d0[2], d0[3], 3));
  vst1q_u16(dst + 22 * stride + 16, vextq_u16(d0_ext, a31, 4));
  vst1q_u16(dst + 22 * stride + 24, a31);
  vst1q_u16(dst + 23 * stride + 0, vextq_u16(d1[1], d1[2], 3));
  vst1q_u16(dst + 23 * stride + 8, vextq_u16(d1[2], d1[3], 3));
  vst1q_u16(dst + 23 * stride + 16, vextq_u16(d1_ext, a31, 4));
  vst1q_u16(dst + 23 * stride + 24, a31);

  vst1q_u16(dst + 24 * stride + 0, vextq_u16(d0[1], d0[2], 4));
  vst1q_u16(dst + 24 * stride + 8, vextq_u16(d0[2], d0[3], 4));
  vst1q_u16(dst + 24 * stride + 16, vextq_u16(d0_ext, a31, 5));
  vst1q_u16(dst + 24 * stride + 24, a31);
  vst1q_u16(dst + 25 * stride + 0, vextq_u16(d1[1], d1[2], 4));
  vst1q_u16(dst + 25 * stride + 8, vextq_u16(d1[2], d1[3], 4));
  vst1q_u16(dst + 25 * stride + 16, vextq_u16(d1_ext, a31, 5));
  vst1q_u16(dst + 25 * stride + 24, a31);

  vst1q_u16(dst + 26 * stride + 0, vextq_u16(d0[1], d0[2], 5));
  vst1q_u16(dst + 26 * stride + 8, vextq_u16(d0[2], d0[3], 5));
  vst1q_u16(dst + 26 * stride + 16, vextq_u16(d0_ext, a31, 6));
  vst1q_u16(dst + 26 * stride + 24, a31);
  vst1q_u16(dst + 27 * stride + 0, vextq_u16(d1[1], d1[2], 5));
  vst1q_u16(dst + 27 * stride + 8, vextq_u16(d1[2], d1[3], 5));
  vst1q_u16(dst + 27 * stride + 16, vextq_u16(d1_ext, a31, 6));
  vst1q_u16(dst + 27 * stride + 24, a31);

  vst1q_u16(dst + 28 * stride + 0, vextq_u16(d0[1], d0[2], 6));
  vst1q_u16(dst + 28 * stride + 8, vextq_u16(d0[2], d0[3], 6));
  vst1q_u16(dst + 28 * stride + 16, vextq_u16(d0_ext, a31, 7));
  vst1q_u16(dst + 28 * stride + 24, a31);
  vst1q_u16(dst + 29 * stride + 0, vextq_u16(d1[1], d1[2], 6));
  vst1q_u16(dst + 29 * stride + 8, vextq_u16(d1[2], d1[3], 6));
  vst1q_u16(dst + 29 * stride + 16, vextq_u16(d1_ext, a31, 7));
  vst1q_u16(dst + 29 * stride + 24, a31);

  vst1q_u16(dst + 30 * stride + 0, vextq_u16(d0[1], d0[2], 7));
  vst1q_u16(dst + 30 * stride + 8, vextq_u16(d0[2], d0[3], 7));
  vst1q_u16(dst + 30 * stride + 16, a31);
  vst1q_u16(dst + 30 * stride + 24, a31);
  vst1q_u16(dst + 31 * stride + 0, vextq_u16(d1[1], d1[2], 7));
  vst1q_u16(dst + 31 * stride + 8, vextq_u16(d1[2], d1[3], 7));
  vst1q_u16(dst + 31 * stride + 16, a31);
  vst1q_u16(dst + 31 * stride + 24, a31);
}

// -----------------------------------------------------------------------------

void vpx_highbd_d117_predictor_4x4_neon(uint16_t *dst, ptrdiff_t stride,
                                        const uint16_t *above,
                                        const uint16_t *left, int bd) {
  uint16x4_t az, a0, l0az, l0, l1, azl0, col0, col0_even, col0_odd, d0, d1;
  (void)bd;

  az = vld1_u16(above - 1);
  a0 = vld1_u16(above + 0);
  // [ left[0], above[-1], above[0], above[1] ]
  l0az = vext_u16(vld1_dup_u16(left), az, 3);

  l0 = vld1_u16(left + 0);
  // The last lane here is unused, reading left[4] could cause a buffer
  // over-read, so just fill with a duplicate of left[0] to avoid needing to
  // materialize a zero:
  // [ left[1], left[2], left[3], x ]
  l1 = vext_u16(l0, l0, 1);
  // [ above[-1], left[0], left[1], left[2] ]
  azl0 = vext_u16(vld1_dup_u16(above - 1), l0, 3);

  d0 = vrhadd_u16(az, a0);
  d1 = vrhadd_u16(vhadd_u16(l0az, a0), az);

  col0 = vrhadd_u16(vhadd_u16(azl0, l1), l0);
  col0_even = vdup_lane_u16(col0, 0);
  col0_odd = vdup_lane_u16(col0, 1);

  vst1_u16(dst + 0 * stride, d0);
  vst1_u16(dst + 1 * stride, d1);
  vst1_u16(dst + 2 * stride, vext_u16(col0_even, d0, 3));
  vst1_u16(dst + 3 * stride, vext_u16(col0_odd, d1, 3));
}

void vpx_highbd_d117_predictor_8x8_neon(uint16_t *dst, ptrdiff_t stride,
                                        const uint16_t *above,
                                        const uint16_t *left, int bd) {
  uint16x8_t az, a0, l0az, l0, l1, azl0, col0, col0_even, col0_odd, d0, d1;
  (void)bd;

  az = vld1q_u16(above - 1);
  a0 = vld1q_u16(above + 0);
  // [ left[0], above[-1], ..., left[5] ]
  l0az = vextq_u16(vld1q_dup_u16(left), az, 7);

  l0 = vld1q_u16(left + 0);
  // The last lane here is unused, reading left[8] could cause a buffer
  // over-read, so just fill with a duplicate of left[0] to avoid needing to
  // materialize a zero:
  // [ left[1], ... , left[7], x ]
  l1 = vextq_u16(l0, l0, 1);
  // [ above[-1], left[0], ..., left[6] ]
  azl0 = vextq_u16(vld1q_dup_u16(above - 1), l0, 7);

  // d0[0] = AVG2(above[-1], above[0])
  // ...
  // d0[7] = AVG2(above[6], above[7])
  d0 = vrhaddq_u16(az, a0);

  // d1[0] = AVG3(left[0], above[-1], above[0])
  // d1[1] = AVG3(above[-1], above[0], above[1])
  // ...
  // d1[7] = AVG3(above[5], above[6], above[7])
  d1 = vrhaddq_u16(vhaddq_u16(l0az, a0), az);

  // The ext instruction shifts elements in from the end of the vector rather
  // than the start, so reverse the vector to put the elements to be shifted in
  // at the end:
  // col0[7] = AVG3(above[-1], left[0], left[1])
  // col0[6] = AVG3(left[0], left[1], left[2])
  // ...
  // col0[0] = AVG3(left[6], left[7], left[8])
  col0 = vrhaddq_u16(vhaddq_u16(azl0, l1), l0);
  col0 = vrev64q_u16(vextq_u16(col0, col0, 4));

  // We don't care about the first parameter to this uzp since we only ever use
  // the high three elements, we just use col0 again since it is already
  // available:
  // col0_even = [ x, x, x, x, x, col0[3], col0[5], col0[7] ]
  // col0_odd = [ x, x, x, x, x, col0[2], col0[4], col0[6] ]
  col0_even = vuzpq_u16(col0, col0).val[1];
  col0_odd = vuzpq_u16(col0, col0).val[0];

  // Incrementally shift more elements from col0 into d0/1:
  // stride=0 [ d0[0],   d0[1],   d0[2],   d0[3], d0[4], d0[5], d0[6], d0[7] ]
  // stride=1 [ d1[0],   d1[1],   d1[2],   d1[3], d1[4], d1[5], d1[6], d1[7] ]
  // stride=2 [ col0[7], d0[0],   d0[1],   d0[2], d0[3], d0[4], d0[5], d0[6] ]
  // stride=3 [ col0[6], d1[0],   d1[1],   d1[2], d1[3], d1[4], d1[5], d1[6] ]
  // stride=4 [ col0[5], col0[7], d0[0],   d0[1], d0[2], d0[3], d0[4], d0[5] ]
  // stride=5 [ col0[4], col0[6], d1[0],   d1[1], d1[2], d1[3], d1[4], d1[5] ]
  // stride=6 [ col0[3], col0[5], col0[7], d0[0], d0[1], d0[2], d0[3], d0[4] ]
  // stride=7 [ col0[2], col0[4], col0[6], d1[0], d1[1], d1[2], d1[3], d1[4] ]
  vst1q_u16(dst + 0 * stride, d0);
  vst1q_u16(dst + 1 * stride, d1);
  vst1q_u16(dst + 2 * stride, vextq_u16(col0_even, d0, 7));
  vst1q_u16(dst + 3 * stride, vextq_u16(col0_odd, d1, 7));
  vst1q_u16(dst + 4 * stride, vextq_u16(col0_even, d0, 6));
  vst1q_u16(dst + 5 * stride, vextq_u16(col0_odd, d1, 6));
  vst1q_u16(dst + 6 * stride, vextq_u16(col0_even, d0, 5));
  vst1q_u16(dst + 7 * stride, vextq_u16(col0_odd, d1, 5));
}

void vpx_highbd_d117_predictor_16x16_neon(uint16_t *dst, ptrdiff_t stride,
                                          const uint16_t *above,
                                          const uint16_t *left, int bd) {
  uint16x8_t az, a0, a6, a7, a8, l0az, l0, l1, l7, l8, l9, azl0, col0_lo,
      col0_hi, col0_even, col0_odd, d0_lo, d0_hi, d1_lo, d1_hi;
  (void)bd;

  az = vld1q_u16(above - 1);
  a0 = vld1q_u16(above + 0);
  a6 = vld1q_u16(above + 6);
  a7 = vld1q_u16(above + 7);
  a8 = vld1q_u16(above + 8);
  // [ left[0], above[-1], ..., left[5] ]
  l0az = vextq_u16(vld1q_dup_u16(left), az, 7);

  l0 = vld1q_u16(left + 0);
  l1 = vld1q_u16(left + 1);
  l7 = vld1q_u16(left + 7);
  l8 = vld1q_u16(left + 8);
  // The last lane here is unused, reading left[16] could cause a buffer
  // over-read, so just fill with a duplicate of left[8] to avoid needing to
  // materialize a zero:
  // [ left[9], ... , left[15], x ]
  l9 = vextq_u16(l8, l8, 1);
  // [ above[-1], left[0], ..., left[6] ]
  azl0 = vextq_u16(vld1q_dup_u16(above - 1), l0, 7);

  d0_lo = vrhaddq_u16(az, a0);
  d0_hi = vrhaddq_u16(a7, a8);
  d1_lo = vrhaddq_u16(vhaddq_u16(l0az, a0), az);
  d1_hi = vrhaddq_u16(vhaddq_u16(a6, a8), a7);

  col0_lo = vrhaddq_u16(vhaddq_u16(azl0, l1), l0);
  col0_hi = vrhaddq_u16(vhaddq_u16(l7, l9), l8);

  // Reverse within each vector, then swap the array indices in the uzp to
  // complete the reversal across all 16 elements.
  col0_lo = vrev64q_u16(vextq_u16(col0_lo, col0_lo, 4));
  col0_hi = vrev64q_u16(vextq_u16(col0_hi, col0_hi, 4));
  col0_even = vuzpq_u16(col0_hi, col0_lo).val[1];
  col0_odd = vuzpq_u16(col0_hi, col0_lo).val[0];

  vst1q_u16(dst + 0 * stride + 0, d0_lo);
  vst1q_u16(dst + 0 * stride + 8, d0_hi);
  vst1q_u16(dst + 1 * stride + 0, d1_lo);
  vst1q_u16(dst + 1 * stride + 8, d1_hi);

  vst1q_u16(dst + 2 * stride + 0, vextq_u16(col0_even, d0_lo, 7));
  vst1q_u16(dst + 2 * stride + 8, vextq_u16(d0_lo, d0_hi, 7));
  vst1q_u16(dst + 3 * stride + 0, vextq_u16(col0_odd, d1_lo, 7));
  vst1q_u16(dst + 3 * stride + 8, vextq_u16(d1_lo, d1_hi, 7));

  vst1q_u16(dst + 4 * stride + 0, vextq_u16(col0_even, d0_lo, 6));
  vst1q_u16(dst + 4 * stride + 8, vextq_u16(d0_lo, d0_hi, 6));
  vst1q_u16(dst + 5 * stride + 0, vextq_u16(col0_odd, d1_lo, 6));
  vst1q_u16(dst + 5 * stride + 8, vextq_u16(d1_lo, d1_hi, 6));

  vst1q_u16(dst + 6 * stride + 0, vextq_u16(col0_even, d0_lo, 5));
  vst1q_u16(dst + 6 * stride + 8, vextq_u16(d0_lo, d0_hi, 5));
  vst1q_u16(dst + 7 * stride + 0, vextq_u16(col0_odd, d1_lo, 5));
  vst1q_u16(dst + 7 * stride + 8, vextq_u16(d1_lo, d1_hi, 5));

  vst1q_u16(dst + 8 * stride + 0, vextq_u16(col0_even, d0_lo, 4));
  vst1q_u16(dst + 8 * stride + 8, vextq_u16(d0_lo, d0_hi, 4));
  vst1q_u16(dst + 9 * stride + 0, vextq_u16(col0_odd, d1_lo, 4));
  vst1q_u16(dst + 9 * stride + 8, vextq_u16(d1_lo, d1_hi, 4));

  vst1q_u16(dst + 10 * stride + 0, vextq_u16(col0_even, d0_lo, 3));
  vst1q_u16(dst + 10 * stride + 8, vextq_u16(d0_lo, d0_hi, 3));
  vst1q_u16(dst + 11 * stride + 0, vextq_u16(col0_odd, d1_lo, 3));
  vst1q_u16(dst + 11 * stride + 8, vextq_u16(d1_lo, d1_hi, 3));

  vst1q_u16(dst + 12 * stride + 0, vextq_u16(col0_even, d0_lo, 2));
  vst1q_u16(dst + 12 * stride + 8, vextq_u16(d0_lo, d0_hi, 2));
  vst1q_u16(dst + 13 * stride + 0, vextq_u16(col0_odd, d1_lo, 2));
  vst1q_u16(dst + 13 * stride + 8, vextq_u16(d1_lo, d1_hi, 2));

  vst1q_u16(dst + 14 * stride + 0, vextq_u16(col0_even, d0_lo, 1));
  vst1q_u16(dst + 14 * stride + 8, vextq_u16(d0_lo, d0_hi, 1));
  vst1q_u16(dst + 15 * stride + 0, vextq_u16(col0_odd, d1_lo, 1));
  vst1q_u16(dst + 15 * stride + 8, vextq_u16(d1_lo, d1_hi, 1));
}

void vpx_highbd_d117_predictor_32x32_neon(uint16_t *dst, ptrdiff_t stride,
                                          const uint16_t *above,
                                          const uint16_t *left, int bd) {
  uint16x8_t az, a0, a6, a7, a8, a14, a15, a16, a22, a23, a24, l0az, l0, l1, l7,
      l8, l9, l15, l16, l17, l23, l24, l25, azl0, d0[4], d1[4], col0[4],
      col0_even[2], col0_odd[2];
  (void)bd;

  az = vld1q_u16(above - 1);
  a0 = vld1q_u16(above + 0);
  a6 = vld1q_u16(above + 6);
  a7 = vld1q_u16(above + 7);
  a8 = vld1q_u16(above + 8);
  a14 = vld1q_u16(above + 14);
  a15 = vld1q_u16(above + 15);
  a16 = vld1q_u16(above + 16);
  a22 = vld1q_u16(above + 22);
  a23 = vld1q_u16(above + 23);
  a24 = vld1q_u16(above + 24);
  // [ left[0], above[-1], ..., left[5] ]
  l0az = vextq_u16(vld1q_dup_u16(left), az, 7);

  l0 = vld1q_u16(left + 0);
  l1 = vld1q_u16(left + 1);
  l7 = vld1q_u16(left + 7);
  l8 = vld1q_u16(left + 8);
  l9 = vld1q_u16(left + 9);
  l15 = vld1q_u16(left + 15);
  l16 = vld1q_u16(left + 16);
  l17 = vld1q_u16(left + 17);
  l23 = vld1q_u16(left + 23);
  l24 = vld1q_u16(left + 24);
  l25 = vld1q_u16(left + 25);
  // The last lane here is unused, reading left[32] could cause a buffer
  // over-read, so just fill with a duplicate of left[24] to avoid needing to
  // materialize a zero:
  // [ left[25], ... , left[31], x ]
  l25 = vextq_u16(l24, l24, 1);
  // [ above[-1], left[0], ..., left[6] ]
  azl0 = vextq_u16(vld1q_dup_u16(above - 1), l0, 7);

  d0[0] = vrhaddq_u16(az, a0);
  d0[1] = vrhaddq_u16(a7, a8);
  d0[2] = vrhaddq_u16(a15, a16);
  d0[3] = vrhaddq_u16(a23, a24);
  d1[0] = vrhaddq_u16(vhaddq_u16(l0az, a0), az);
  d1[1] = vrhaddq_u16(vhaddq_u16(a6, a8), a7);
  d1[2] = vrhaddq_u16(vhaddq_u16(a14, a16), a15);
  d1[3] = vrhaddq_u16(vhaddq_u16(a22, a24), a23);

  col0[0] = vrhaddq_u16(vhaddq_u16(azl0, l1), l0);
  col0[1] = vrhaddq_u16(vhaddq_u16(l7, l9), l8);
  col0[2] = vrhaddq_u16(vhaddq_u16(l15, l17), l16);
  col0[3] = vrhaddq_u16(vhaddq_u16(l23, l25), l24);

  // Reverse within each vector, then swap the array indices in both the uzp
  // and the col0_{even,odd} assignment to complete the reversal across all
  // 32-elements.
  col0[0] = vrev64q_u16(vextq_u16(col0[0], col0[0], 4));
  col0[1] = vrev64q_u16(vextq_u16(col0[1], col0[1], 4));
  col0[2] = vrev64q_u16(vextq_u16(col0[2], col0[2], 4));
  col0[3] = vrev64q_u16(vextq_u16(col0[3], col0[3], 4));

  col0_even[1] = vuzpq_u16(col0[1], col0[0]).val[1];
  col0_even[0] = vuzpq_u16(col0[3], col0[2]).val[1];
  col0_odd[1] = vuzpq_u16(col0[1], col0[0]).val[0];
  col0_odd[0] = vuzpq_u16(col0[3], col0[2]).val[0];

  vst1q_u16(dst + 0 * stride + 0, d0[0]);
  vst1q_u16(dst + 0 * stride + 8, d0[1]);
  vst1q_u16(dst + 0 * stride + 16, d0[2]);
  vst1q_u16(dst + 0 * stride + 24, d0[3]);
  vst1q_u16(dst + 1 * stride + 0, d1[0]);
  vst1q_u16(dst + 1 * stride + 8, d1[1]);
  vst1q_u16(dst + 1 * stride + 16, d1[2]);
  vst1q_u16(dst + 1 * stride + 24, d1[3]);

  vst1q_u16(dst + 2 * stride + 0, vextq_u16(col0_even[1], d0[0], 7));
  vst1q_u16(dst + 2 * stride + 8, vextq_u16(d0[0], d0[1], 7));
  vst1q_u16(dst + 2 * stride + 16, vextq_u16(d0[1], d0[2], 7));
  vst1q_u16(dst + 2 * stride + 24, vextq_u16(d0[2], d0[3], 7));
  vst1q_u16(dst + 3 * stride + 0, vextq_u16(col0_odd[1], d1[0], 7));
  vst1q_u16(dst + 3 * stride + 8, vextq_u16(d1[0], d1[1], 7));
  vst1q_u16(dst + 3 * stride + 16, vextq_u16(d1[1], d1[2], 7));
  vst1q_u16(dst + 3 * stride + 24, vextq_u16(d1[2], d1[3], 7));

  vst1q_u16(dst + 4 * stride + 0, vextq_u16(col0_even[1], d0[0], 6));
  vst1q_u16(dst + 4 * stride + 8, vextq_u16(d0[0], d0[1], 6));
  vst1q_u16(dst + 4 * stride + 16, vextq_u16(d0[1], d0[2], 6));
  vst1q_u16(dst + 4 * stride + 24, vextq_u16(d0[2], d0[3], 6));
  vst1q_u16(dst + 5 * stride + 0, vextq_u16(col0_odd[1], d1[0], 6));
  vst1q_u16(dst + 5 * stride + 8, vextq_u16(d1[0], d1[1], 6));
  vst1q_u16(dst + 5 * stride + 16, vextq_u16(d1[1], d1[2], 6));
  vst1q_u16(dst + 5 * stride + 24, vextq_u16(d1[2], d1[3], 6));

  vst1q_u16(dst + 6 * stride + 0, vextq_u16(col0_even[1], d0[0], 5));
  vst1q_u16(dst + 6 * stride + 8, vextq_u16(d0[0], d0[1], 5));
  vst1q_u16(dst + 6 * stride + 16, vextq_u16(d0[1], d0[2], 5));
  vst1q_u16(dst + 6 * stride + 24, vextq_u16(d0[2], d0[3], 5));
  vst1q_u16(dst + 7 * stride + 0, vextq_u16(col0_odd[1], d1[0], 5));
  vst1q_u16(dst + 7 * stride + 8, vextq_u16(d1[0], d1[1], 5));
  vst1q_u16(dst + 7 * stride + 16, vextq_u16(d1[1], d1[2], 5));
  vst1q_u16(dst + 7 * stride + 24, vextq_u16(d1[2], d1[3], 5));

  vst1q_u16(dst + 8 * stride + 0, vextq_u16(col0_even[1], d0[0], 4));
  vst1q_u16(dst + 8 * stride + 8, vextq_u16(d0[0], d0[1], 4));
  vst1q_u16(dst + 8 * stride + 16, vextq_u16(d0[1], d0[2], 4));
  vst1q_u16(dst + 8 * stride + 24, vextq_u16(d0[2], d0[3], 4));
  vst1q_u16(dst + 9 * stride + 0, vextq_u16(col0_odd[1], d1[0], 4));
  vst1q_u16(dst + 9 * stride + 8, vextq_u16(d1[0], d1[1], 4));
  vst1q_u16(dst + 9 * stride + 16, vextq_u16(d1[1], d1[2], 4));
  vst1q_u16(dst + 9 * stride + 24, vextq_u16(d1[2], d1[3], 4));

  vst1q_u16(dst + 10 * stride + 0, vextq_u16(col0_even[1], d0[0], 3));
  vst1q_u16(dst + 10 * stride + 8, vextq_u16(d0[0], d0[1], 3));
  vst1q_u16(dst + 10 * stride + 16, vextq_u16(d0[1], d0[2], 3));
  vst1q_u16(dst + 10 * stride + 24, vextq_u16(d0[2], d0[3], 3));
  vst1q_u16(dst + 11 * stride + 0, vextq_u16(col0_odd[1], d1[0], 3));
  vst1q_u16(dst + 11 * stride + 8, vextq_u16(d1[0], d1[1], 3));
  vst1q_u16(dst + 11 * stride + 16, vextq_u16(d1[1], d1[2], 3));
  vst1q_u16(dst + 11 * stride + 24, vextq_u16(d1[2], d1[3], 3));

  vst1q_u16(dst + 12 * stride + 0, vextq_u16(col0_even[1], d0[0], 2));
  vst1q_u16(dst + 12 * stride + 8, vextq_u16(d0[0], d0[1], 2));
  vst1q_u16(dst + 12 * stride + 16, vextq_u16(d0[1], d0[2], 2));
  vst1q_u16(dst + 12 * stride + 24, vextq_u16(d0[2], d0[3], 2));
  vst1q_u16(dst + 13 * stride + 0, vextq_u16(col0_odd[1], d1[0], 2));
  vst1q_u16(dst + 13 * stride + 8, vextq_u16(d1[0], d1[1], 2));
  vst1q_u16(dst + 13 * stride + 16, vextq_u16(d1[1], d1[2], 2));
  vst1q_u16(dst + 13 * stride + 24, vextq_u16(d1[2], d1[3], 2));

  vst1q_u16(dst + 14 * stride + 0, vextq_u16(col0_even[1], d0[0], 1));
  vst1q_u16(dst + 14 * stride + 8, vextq_u16(d0[0], d0[1], 1));
  vst1q_u16(dst + 14 * stride + 16, vextq_u16(d0[1], d0[2], 1));
  vst1q_u16(dst + 14 * stride + 24, vextq_u16(d0[2], d0[3], 1));
  vst1q_u16(dst + 15 * stride + 0, vextq_u16(col0_odd[1], d1[0], 1));
  vst1q_u16(dst + 15 * stride + 8, vextq_u16(d1[0], d1[1], 1));
  vst1q_u16(dst + 15 * stride + 16, vextq_u16(d1[1], d1[2], 1));
  vst1q_u16(dst + 15 * stride + 24, vextq_u16(d1[2], d1[3], 1));

  vst1q_u16(dst + 16 * stride + 0, col0_even[1]);
  vst1q_u16(dst + 16 * stride + 8, d0[0]);
  vst1q_u16(dst + 16 * stride + 16, d0[1]);
  vst1q_u16(dst + 16 * stride + 24, d0[2]);
  vst1q_u16(dst + 17 * stride + 0, col0_odd[1]);
  vst1q_u16(dst + 17 * stride + 8, d1[0]);
  vst1q_u16(dst + 17 * stride + 16, d1[1]);
  vst1q_u16(dst + 17 * stride + 24, d1[2]);

  vst1q_u16(dst + 18 * stride + 0, vextq_u16(col0_even[0], col0_even[1], 7));
  vst1q_u16(dst + 18 * stride + 8, vextq_u16(col0_even[1], d0[0], 7));
  vst1q_u16(dst + 18 * stride + 16, vextq_u16(d0[0], d0[1], 7));
  vst1q_u16(dst + 18 * stride + 24, vextq_u16(d0[1], d0[2], 7));
  vst1q_u16(dst + 19 * stride + 0, vextq_u16(col0_odd[0], col0_odd[1], 7));
  vst1q_u16(dst + 19 * stride + 8, vextq_u16(col0_odd[1], d1[0], 7));
  vst1q_u16(dst + 19 * stride + 16, vextq_u16(d1[0], d1[1], 7));
  vst1q_u16(dst + 19 * stride + 24, vextq_u16(d1[1], d1[2], 7));

  vst1q_u16(dst + 20 * stride + 0, vextq_u16(col0_even[0], col0_even[1], 6));
  vst1q_u16(dst + 20 * stride + 8, vextq_u16(col0_even[1], d0[0], 6));
  vst1q_u16(dst + 20 * stride + 16, vextq_u16(d0[0], d0[1], 6));
  vst1q_u16(dst + 20 * stride + 24, vextq_u16(d0[1], d0[2], 6));
  vst1q_u16(dst + 21 * stride + 0, vextq_u16(col0_odd[0], col0_odd[1], 6));
  vst1q_u16(dst + 21 * stride + 8, vextq_u16(col0_odd[1], d1[0], 6));
  vst1q_u16(dst + 21 * stride + 16, vextq_u16(d1[0], d1[1], 6));
  vst1q_u16(dst + 21 * stride + 24, vextq_u16(d1[1], d1[2], 6));

  vst1q_u16(dst + 22 * stride + 0, vextq_u16(col0_even[0], col0_even[1], 5));
  vst1q_u16(dst + 22 * stride + 8, vextq_u16(col0_even[1], d0[0], 5));
  vst1q_u16(dst + 22 * stride + 16, vextq_u16(d0[0], d0[1], 5));
  vst1q_u16(dst + 22 * stride + 24, vextq_u16(d0[1], d0[2], 5));
  vst1q_u16(dst + 23 * stride + 0, vextq_u16(col0_odd[0], col0_odd[1], 5));
  vst1q_u16(dst + 23 * stride + 8, vextq_u16(col0_odd[1], d1[0], 5));
  vst1q_u16(dst + 23 * stride + 16, vextq_u16(d1[0], d1[1], 5));
  vst1q_u16(dst + 23 * stride + 24, vextq_u16(d1[1], d1[2], 5));

  vst1q_u16(dst + 24 * stride + 0, vextq_u16(col0_even[0], col0_even[1], 4));
  vst1q_u16(dst + 24 * stride + 8, vextq_u16(col0_even[1], d0[0], 4));
  vst1q_u16(dst + 24 * stride + 16, vextq_u16(d0[0], d0[1], 4));
  vst1q_u16(dst + 24 * stride + 24, vextq_u16(d0[1], d0[2], 4));
  vst1q_u16(dst + 25 * stride + 0, vextq_u16(col0_odd[0], col0_odd[1], 4));
  vst1q_u16(dst + 25 * stride + 8, vextq_u16(col0_odd[1], d1[0], 4));
  vst1q_u16(dst + 25 * stride + 16, vextq_u16(d1[0], d1[1], 4));
  vst1q_u16(dst + 25 * stride + 24, vextq_u16(d1[1], d1[2], 4));

  vst1q_u16(dst + 26 * stride + 0, vextq_u16(col0_even[0], col0_even[1], 3));
  vst1q_u16(dst + 26 * stride + 8, vextq_u16(col0_even[1], d0[0], 3));
  vst1q_u16(dst + 26 * stride + 16, vextq_u16(d0[0], d0[1], 3));
  vst1q_u16(dst + 26 * stride + 24, vextq_u16(d0[1], d0[2], 3));
  vst1q_u16(dst + 27 * stride + 0, vextq_u16(col0_odd[0], col0_odd[1], 3));
  vst1q_u16(dst + 27 * stride + 8, vextq_u16(col0_odd[1], d1[0], 3));
  vst1q_u16(dst + 27 * stride + 16, vextq_u16(d1[0], d1[1], 3));
  vst1q_u16(dst + 27 * stride + 24, vextq_u16(d1[1], d1[2], 3));

  vst1q_u16(dst + 28 * stride + 0, vextq_u16(col0_even[0], col0_even[1], 2));
  vst1q_u16(dst + 28 * stride + 8, vextq_u16(col0_even[1], d0[0], 2));
  vst1q_u16(dst + 28 * stride + 16, vextq_u16(d0[0], d0[1], 2));
  vst1q_u16(dst + 28 * stride + 24, vextq_u16(d0[1], d0[2], 2));
  vst1q_u16(dst + 29 * stride + 0, vextq_u16(col0_odd[0], col0_odd[1], 2));
  vst1q_u16(dst + 29 * stride + 8, vextq_u16(col0_odd[1], d1[0], 2));
  vst1q_u16(dst + 29 * stride + 16, vextq_u16(d1[0], d1[1], 2));
  vst1q_u16(dst + 29 * stride + 24, vextq_u16(d1[1], d1[2], 2));

  vst1q_u16(dst + 30 * stride + 0, vextq_u16(col0_even[0], col0_even[1], 1));
  vst1q_u16(dst + 30 * stride + 8, vextq_u16(col0_even[1], d0[0], 1));
  vst1q_u16(dst + 30 * stride + 16, vextq_u16(d0[0], d0[1], 1));
  vst1q_u16(dst + 30 * stride + 24, vextq_u16(d0[1], d0[2], 1));
  vst1q_u16(dst + 31 * stride + 0, vextq_u16(col0_odd[0], col0_odd[1], 1));
  vst1q_u16(dst + 31 * stride + 8, vextq_u16(col0_odd[1], d1[0], 1));
  vst1q_u16(dst + 31 * stride + 16, vextq_u16(d1[0], d1[1], 1));
  vst1q_u16(dst + 31 * stride + 24, vextq_u16(d1[1], d1[2], 1));
}

// -----------------------------------------------------------------------------

void vpx_highbd_d153_predictor_4x4_neon(uint16_t *dst, ptrdiff_t stride,
                                        const uint16_t *above,
                                        const uint16_t *left, int bd) {
  // See vpx_highbd_d153_predictor_8x8_neon for details on the implementation.
  uint16x4_t az, a0, l0az, l0, l1, azl0, d0, d1, d2, d20_lo, d20_hi;
  (void)bd;

  az = vld1_u16(above - 1);
  a0 = vld1_u16(above + 0);
  // [ left[0], above[-1], above[0], above[1] ]
  l0az = vext_u16(vld1_dup_u16(left), az, 3);

  l0 = vld1_u16(left);
  // The last lane here is unused, reading left[4] could cause a buffer
  // over-read, so just fill with a duplicate of left[0] to avoid needing to
  // materialize a zero:
  // [ left[1], left[2], left[3], x ]
  l1 = vext_u16(l0, l0, 1);
  // [ above[-1], left[0], left[1], left[2] ]
  azl0 = vext_u16(vld1_dup_u16(above - 1), l0, 3);

  d0 = vrhadd_u16(azl0, l0);
  d1 = vrhadd_u16(vhadd_u16(l0az, a0), az);
  d2 = vrhadd_u16(vhadd_u16(azl0, l1), l0);

  d20_lo = vzip_u16(vrev64_u16(d2), vrev64_u16(d0)).val[0];
  d20_hi = vzip_u16(vrev64_u16(d2), vrev64_u16(d0)).val[1];

  // Incrementally shift more elements from d0/d2 reversed into d1:
  // stride=0 [ d0[0], d1[0], d1[1], d1[2] ]
  // stride=1 [ d0[1], d2[0], d0[0], d1[0] ]
  // stride=2 [ d0[2], d2[1], d0[1], d2[0] ]
  // stride=3 [ d0[3], d2[2], d0[2], d2[1] ]
  vst1_u16(dst + 0 * stride, vext_u16(d20_hi, d1, 3));
  vst1_u16(dst + 1 * stride, vext_u16(d20_hi, d1, 1));
  vst1_u16(dst + 2 * stride, vext_u16(d20_lo, d20_hi, 3));
  vst1_u16(dst + 3 * stride, vext_u16(d20_lo, d20_hi, 1));
}

void vpx_highbd_d153_predictor_8x8_neon(uint16_t *dst, ptrdiff_t stride,
                                        const uint16_t *above,
                                        const uint16_t *left, int bd) {
  uint16x8_t az, a0, l0az, l0, l1, azl0, d0, d1, d2, d0_rev, d2_rev, d20_lo,
      d20_hi;
  (void)bd;

  az = vld1q_u16(above - 1);
  a0 = vld1q_u16(above + 0);
  // [ left[0], above[-1], ... , above[5] ]
  l0az = vextq_u16(vld1q_dup_u16(left), az, 7);

  l0 = vld1q_u16(left);
  // The last lane here is unused, reading left[8] could cause a buffer
  // over-read, so just fill with a duplicate of left[0] to avoid needing to
  // materialize a zero:
  // [ left[1], ... , left[7], x ]
  l1 = vextq_u16(l0, l0, 1);
  // [ above[-1], left[0], ... , left[6] ]
  azl0 = vextq_u16(vld1q_dup_u16(above - 1), l0, 7);

  // d0[0] = AVG2(above[-1], left[0])
  // d0[1] = AVG2(left[0], left[1])
  // ...
  // d0[7] = AVG2(left[6], left[7])
  d0 = vrhaddq_u16(azl0, l0);

  // d1[0] = AVG3(left[0], above[-1], above[0])
  // d1[1] = AVG3(above[-1], above[0], above[1])
  // ...
  // d1[7] = AVG3(above[5], above[6], above[7])
  d1 = vrhaddq_u16(vhaddq_u16(l0az, a0), az);

  // d2[0] = AVG3(above[-1], left[0], left[1])
  // d2[1] = AVG3(left[0], left[1], left[2])
  // ...
  // d2[7] = AVG3(left[6], left[7], left[8])
  d2 = vrhaddq_u16(vhaddq_u16(azl0, l1), l0);

  // The ext instruction shifts elements in from the end of the vector rather
  // than the start, so reverse the vectors to put the elements to be shifted
  // in at the end:
  d0_rev = vrev64q_u16(vextq_u16(d0, d0, 4));
  d2_rev = vrev64q_u16(vextq_u16(d2, d2, 4));

  d20_lo = vzipq_u16(d2_rev, d0_rev).val[0];
  d20_hi = vzipq_u16(d2_rev, d0_rev).val[1];

  // Incrementally shift more elements from d0/d2 reversed into d1:
  // stride=0 [ d0[0], d1[0], d1[1], d1[2], d1[3], d1[4], d1[5], d1[6] ]
  // stride=1 [ d0[1], d2[0], d0[0], d1[0], d1[1], d1[2], d1[3], d1[4] ]
  // stride=2 [ d0[2], d2[1], d0[1], d2[0], d0[0], d1[0], d1[1], d1[2] ]
  // stride=3 [ d0[3], d2[2], d0[2], d2[1], d0[1], d2[0], d0[0], d1[0] ]
  // stride=4 [ d0[4], d2[3], d0[3], d2[2], d0[2], d2[1], d0[1], d2[0] ]
  // stride=5 [ d0[5], d2[4], d0[4], d2[3], d0[3], d2[2], d0[2], d2[1] ]
  // stride=6 [ d0[6], d2[5], d0[5], d2[4], d0[4], d2[3], d0[3], d2[2] ]
  // stride=7 [ d0[7], d2[6], d0[6], d2[5], d0[5], d2[4], d0[4], d2[3] ]
  vst1q_u16(dst + 0 * stride, vextq_u16(d20_hi, d1, 7));
  vst1q_u16(dst + 1 * stride, vextq_u16(d20_hi, d1, 5));
  vst1q_u16(dst + 2 * stride, vextq_u16(d20_hi, d1, 3));
  vst1q_u16(dst + 3 * stride, vextq_u16(d20_hi, d1, 1));
  vst1q_u16(dst + 4 * stride, vextq_u16(d20_lo, d20_hi, 7));
  vst1q_u16(dst + 5 * stride, vextq_u16(d20_lo, d20_hi, 5));
  vst1q_u16(dst + 6 * stride, vextq_u16(d20_lo, d20_hi, 3));
  vst1q_u16(dst + 7 * stride, vextq_u16(d20_lo, d20_hi, 1));
}

void vpx_highbd_d153_predictor_16x16_neon(uint16_t *dst, ptrdiff_t stride,
                                          const uint16_t *above,
                                          const uint16_t *left, int bd) {
  // See vpx_highbd_d153_predictor_8x8_neon for details on the implementation.
  uint16x8_t az, a0, a6, a7, a8, l0az, l0, l1, l7, l8, l9, azl0, d0[2], d1[2],
      d2[2], d20[4];
  (void)bd;

  az = vld1q_u16(above - 1);
  a0 = vld1q_u16(above + 0);
  a6 = vld1q_u16(above + 6);
  a7 = vld1q_u16(above + 7);
  a8 = vld1q_u16(above + 8);
  // [ left[0], above[-1], ... , above[13] ]
  l0az = vextq_u16(vld1q_dup_u16(left), az, 7);

  l0 = vld1q_u16(left + 0);
  l1 = vld1q_u16(left + 1);
  l7 = vld1q_u16(left + 7);
  l8 = vld1q_u16(left + 8);
  // The last lane here is unused, reading left[16] could cause a buffer
  // over-read, so just fill with a duplicate of left[8] to avoid needing to
  // materialize a zero:
  // [ left[9], ... , left[15], x ]
  l9 = vextq_u16(l8, l8, 1);
  // [ above[-1], left[0], ... , left[14] ]
  azl0 = vextq_u16(vld1q_dup_u16(above - 1), l0, 7);

  d0[0] = vrhaddq_u16(azl0, l0);
  d0[1] = vrhaddq_u16(l7, l8);
  d1[0] = vrhaddq_u16(vhaddq_u16(l0az, a0), az);
  d1[1] = vrhaddq_u16(vhaddq_u16(a6, a8), a7);
  d2[0] = vrhaddq_u16(vhaddq_u16(azl0, l1), l0);
  d2[1] = vrhaddq_u16(vhaddq_u16(l7, l9), l8);

  d0[0] = vrev64q_u16(vextq_u16(d0[0], d0[0], 4));
  d0[1] = vrev64q_u16(vextq_u16(d0[1], d0[1], 4));
  d2[0] = vrev64q_u16(vextq_u16(d2[0], d2[0], 4));
  d2[1] = vrev64q_u16(vextq_u16(d2[1], d2[1], 4));

  d20[0] = vzipq_u16(d2[1], d0[1]).val[0];
  d20[1] = vzipq_u16(d2[1], d0[1]).val[1];
  d20[2] = vzipq_u16(d2[0], d0[0]).val[0];
  d20[3] = vzipq_u16(d2[0], d0[0]).val[1];

  vst1q_u16(dst + 0 * stride + 0, vextq_u16(d20[3], d1[0], 7));
  vst1q_u16(dst + 0 * stride + 8, vextq_u16(d1[0], d1[1], 7));
  vst1q_u16(dst + 1 * stride + 0, vextq_u16(d20[3], d1[0], 5));
  vst1q_u16(dst + 1 * stride + 8, vextq_u16(d1[0], d1[1], 5));
  vst1q_u16(dst + 2 * stride + 0, vextq_u16(d20[3], d1[0], 3));
  vst1q_u16(dst + 2 * stride + 8, vextq_u16(d1[0], d1[1], 3));
  vst1q_u16(dst + 3 * stride + 0, vextq_u16(d20[3], d1[0], 1));
  vst1q_u16(dst + 3 * stride + 8, vextq_u16(d1[0], d1[1], 1));

  vst1q_u16(dst + 4 * stride + 0, vextq_u16(d20[2], d20[3], 7));
  vst1q_u16(dst + 4 * stride + 8, vextq_u16(d20[3], d1[0], 7));
  vst1q_u16(dst + 5 * stride + 0, vextq_u16(d20[2], d20[3], 5));
  vst1q_u16(dst + 5 * stride + 8, vextq_u16(d20[3], d1[0], 5));
  vst1q_u16(dst + 6 * stride + 0, vextq_u16(d20[2], d20[3], 3));
  vst1q_u16(dst + 6 * stride + 8, vextq_u16(d20[3], d1[0], 3));
  vst1q_u16(dst + 7 * stride + 0, vextq_u16(d20[2], d20[3], 1));
  vst1q_u16(dst + 7 * stride + 8, vextq_u16(d20[3], d1[0], 1));

  vst1q_u16(dst + 8 * stride + 0, vextq_u16(d20[1], d20[2], 7));
  vst1q_u16(dst + 8 * stride + 8, vextq_u16(d20[2], d20[3], 7));
  vst1q_u16(dst + 9 * stride + 0, vextq_u16(d20[1], d20[2], 5));
  vst1q_u16(dst + 9 * stride + 8, vextq_u16(d20[2], d20[3], 5));
  vst1q_u16(dst + 10 * stride + 0, vextq_u16(d20[1], d20[2], 3));
  vst1q_u16(dst + 10 * stride + 8, vextq_u16(d20[2], d20[3], 3));
  vst1q_u16(dst + 11 * stride + 0, vextq_u16(d20[1], d20[2], 1));
  vst1q_u16(dst + 11 * stride + 8, vextq_u16(d20[2], d20[3], 1));

  vst1q_u16(dst + 12 * stride + 0, vextq_u16(d20[0], d20[1], 7));
  vst1q_u16(dst + 12 * stride + 8, vextq_u16(d20[1], d20[2], 7));
  vst1q_u16(dst + 13 * stride + 0, vextq_u16(d20[0], d20[1], 5));
  vst1q_u16(dst + 13 * stride + 8, vextq_u16(d20[1], d20[2], 5));
  vst1q_u16(dst + 14 * stride + 0, vextq_u16(d20[0], d20[1], 3));
  vst1q_u16(dst + 14 * stride + 8, vextq_u16(d20[1], d20[2], 3));
  vst1q_u16(dst + 15 * stride + 0, vextq_u16(d20[0], d20[1], 1));
  vst1q_u16(dst + 15 * stride + 8, vextq_u16(d20[1], d20[2], 1));
}

void vpx_highbd_d153_predictor_32x32_neon(uint16_t *dst, ptrdiff_t stride,
                                          const uint16_t *above,
                                          const uint16_t *left, int bd) {
  // See vpx_highbd_d153_predictor_8x8_neon for details on the implementation.
  uint16x8_t az, a0, a6, a7, a8, a14, a15, a16, a22, a23, a24, l0az, l0, l1, l7,
      l8, l9, l15, l16, l17, l23, l24, l25, azl0, d0[4], d1[4], d2[4], d20[8];
  (void)bd;

  az = vld1q_u16(above - 1);
  a0 = vld1q_u16(above + 0);
  a6 = vld1q_u16(above + 6);
  a7 = vld1q_u16(above + 7);
  a8 = vld1q_u16(above + 8);
  a14 = vld1q_u16(above + 14);
  a15 = vld1q_u16(above + 15);
  a16 = vld1q_u16(above + 16);
  a22 = vld1q_u16(above + 22);
  a23 = vld1q_u16(above + 23);
  a24 = vld1q_u16(above + 24);
  // [ left[0], above[-1], ... , above[13] ]
  l0az = vextq_u16(vld1q_dup_u16(left), az, 7);

  l0 = vld1q_u16(left + 0);
  l1 = vld1q_u16(left + 1);
  l7 = vld1q_u16(left + 7);
  l8 = vld1q_u16(left + 8);
  l9 = vld1q_u16(left + 9);
  l15 = vld1q_u16(left + 15);
  l16 = vld1q_u16(left + 16);
  l17 = vld1q_u16(left + 17);
  l23 = vld1q_u16(left + 23);
  l24 = vld1q_u16(left + 24);
  // The last lane here is unused, reading left[32] could cause a buffer
  // over-read, so just fill with a duplicate of left[24] to avoid needing to
  // materialize a zero:
  // [ left[25], ... , left[31], x ]
  l25 = vextq_u16(l24, l24, 1);
  // [ above[-1], left[0], ... , left[14] ]
  azl0 = vextq_u16(vld1q_dup_u16(above - 1), l0, 7);

  d0[0] = vrhaddq_u16(azl0, l0);
  d0[1] = vrhaddq_u16(l7, l8);
  d0[2] = vrhaddq_u16(l15, l16);
  d0[3] = vrhaddq_u16(l23, l24);

  d1[0] = vrhaddq_u16(vhaddq_u16(l0az, a0), az);
  d1[1] = vrhaddq_u16(vhaddq_u16(a6, a8), a7);
  d1[2] = vrhaddq_u16(vhaddq_u16(a14, a16), a15);
  d1[3] = vrhaddq_u16(vhaddq_u16(a22, a24), a23);

  d2[0] = vrhaddq_u16(vhaddq_u16(azl0, l1), l0);
  d2[1] = vrhaddq_u16(vhaddq_u16(l7, l9), l8);
  d2[2] = vrhaddq_u16(vhaddq_u16(l15, l17), l16);
  d2[3] = vrhaddq_u16(vhaddq_u16(l23, l25), l24);

  d0[0] = vrev64q_u16(vextq_u16(d0[0], d0[0], 4));
  d0[1] = vrev64q_u16(vextq_u16(d0[1], d0[1], 4));
  d0[2] = vrev64q_u16(vextq_u16(d0[2], d0[2], 4));
  d0[3] = vrev64q_u16(vextq_u16(d0[3], d0[3], 4));
  d2[0] = vrev64q_u16(vextq_u16(d2[0], d2[0], 4));
  d2[1] = vrev64q_u16(vextq_u16(d2[1], d2[1], 4));
  d2[2] = vrev64q_u16(vextq_u16(d2[2], d2[2], 4));
  d2[3] = vrev64q_u16(vextq_u16(d2[3], d2[3], 4));

  d20[0] = vzipq_u16(d2[3], d0[3]).val[0];
  d20[1] = vzipq_u16(d2[3], d0[3]).val[1];
  d20[2] = vzipq_u16(d2[2], d0[2]).val[0];
  d20[3] = vzipq_u16(d2[2], d0[2]).val[1];
  d20[4] = vzipq_u16(d2[1], d0[1]).val[0];
  d20[5] = vzipq_u16(d2[1], d0[1]).val[1];
  d20[6] = vzipq_u16(d2[0], d0[0]).val[0];
  d20[7] = vzipq_u16(d2[0], d0[0]).val[1];

  vst1q_u16(dst + 0 * stride + 0, vextq_u16(d20[7], d1[0], 7));
  vst1q_u16(dst + 0 * stride + 8, vextq_u16(d1[0], d1[1], 7));
  vst1q_u16(dst + 0 * stride + 16, vextq_u16(d1[1], d1[2], 7));
  vst1q_u16(dst + 0 * stride + 24, vextq_u16(d1[2], d1[3], 7));
  vst1q_u16(dst + 1 * stride + 0, vextq_u16(d20[7], d1[0], 5));
  vst1q_u16(dst + 1 * stride + 8, vextq_u16(d1[0], d1[1], 5));
  vst1q_u16(dst + 1 * stride + 16, vextq_u16(d1[1], d1[2], 5));
  vst1q_u16(dst + 1 * stride + 24, vextq_u16(d1[2], d1[3], 5));
  vst1q_u16(dst + 2 * stride + 0, vextq_u16(d20[7], d1[0], 3));
  vst1q_u16(dst + 2 * stride + 8, vextq_u16(d1[0], d1[1], 3));
  vst1q_u16(dst + 2 * stride + 16, vextq_u16(d1[1], d1[2], 3));
  vst1q_u16(dst + 2 * stride + 24, vextq_u16(d1[2], d1[3], 3));
  vst1q_u16(dst + 3 * stride + 0, vextq_u16(d20[7], d1[0], 1));
  vst1q_u16(dst + 3 * stride + 8, vextq_u16(d1[0], d1[1], 1));
  vst1q_u16(dst + 3 * stride + 16, vextq_u16(d1[1], d1[2], 1));
  vst1q_u16(dst + 3 * stride + 24, vextq_u16(d1[2], d1[3], 1));

  vst1q_u16(dst + 4 * stride + 0, vextq_u16(d20[6], d20[7], 7));
  vst1q_u16(dst + 4 * stride + 8, vextq_u16(d20[7], d1[0], 7));
  vst1q_u16(dst + 4 * stride + 16, vextq_u16(d1[0], d1[1], 7));
  vst1q_u16(dst + 4 * stride + 24, vextq_u16(d1[1], d1[2], 7));
  vst1q_u16(dst + 5 * stride + 0, vextq_u16(d20[6], d20[7], 5));
  vst1q_u16(dst + 5 * stride + 8, vextq_u16(d20[7], d1[0], 5));
  vst1q_u16(dst + 5 * stride + 16, vextq_u16(d1[0], d1[1], 5));
  vst1q_u16(dst + 5 * stride + 24, vextq_u16(d1[1], d1[2], 5));
  vst1q_u16(dst + 6 * stride + 0, vextq_u16(d20[6], d20[7], 3));
  vst1q_u16(dst + 6 * stride + 8, vextq_u16(d20[7], d1[0], 3));
  vst1q_u16(dst + 6 * stride + 16, vextq_u16(d1[0], d1[1], 3));
  vst1q_u16(dst + 6 * stride + 24, vextq_u16(d1[1], d1[2], 3));
  vst1q_u16(dst + 7 * stride + 0, vextq_u16(d20[6], d20[7], 1));
  vst1q_u16(dst + 7 * stride + 8, vextq_u16(d20[7], d1[0], 1));
  vst1q_u16(dst + 7 * stride + 16, vextq_u16(d1[0], d1[1], 1));
  vst1q_u16(dst + 7 * stride + 24, vextq_u16(d1[1], d1[2], 1));

  vst1q_u16(dst + 8 * stride + 0, vextq_u16(d20[5], d20[6], 7));
  vst1q_u16(dst + 8 * stride + 8, vextq_u16(d20[6], d20[7], 7));
  vst1q_u16(dst + 8 * stride + 16, vextq_u16(d20[7], d1[0], 7));
  vst1q_u16(dst + 8 * stride + 24, vextq_u16(d1[0], d1[1], 7));
  vst1q_u16(dst + 9 * stride + 0, vextq_u16(d20[5], d20[6], 5));
  vst1q_u16(dst + 9 * stride + 8, vextq_u16(d20[6], d20[7], 5));
  vst1q_u16(dst + 9 * stride + 16, vextq_u16(d20[7], d1[0], 5));
  vst1q_u16(dst + 9 * stride + 24, vextq_u16(d1[0], d1[1], 5));
  vst1q_u16(dst + 10 * stride + 0, vextq_u16(d20[5], d20[6], 3));
  vst1q_u16(dst + 10 * stride + 8, vextq_u16(d20[6], d20[7], 3));
  vst1q_u16(dst + 10 * stride + 16, vextq_u16(d20[7], d1[0], 3));
  vst1q_u16(dst + 10 * stride + 24, vextq_u16(d1[0], d1[1], 3));
  vst1q_u16(dst + 11 * stride + 0, vextq_u16(d20[5], d20[6], 1));
  vst1q_u16(dst + 11 * stride + 8, vextq_u16(d20[6], d20[7], 1));
  vst1q_u16(dst + 11 * stride + 16, vextq_u16(d20[7], d1[0], 1));
  vst1q_u16(dst + 11 * stride + 24, vextq_u16(d1[0], d1[1], 1));

  vst1q_u16(dst + 12 * stride + 0, vextq_u16(d20[4], d20[5], 7));
  vst1q_u16(dst + 12 * stride + 8, vextq_u16(d20[5], d20[6], 7));
  vst1q_u16(dst + 12 * stride + 16, vextq_u16(d20[6], d20[7], 7));
  vst1q_u16(dst + 12 * stride + 24, vextq_u16(d20[7], d1[0], 7));
  vst1q_u16(dst + 13 * stride + 0, vextq_u16(d20[4], d20[5], 5));
  vst1q_u16(dst + 13 * stride + 8, vextq_u16(d20[5], d20[6], 5));
  vst1q_u16(dst + 13 * stride + 16, vextq_u16(d20[6], d20[7], 5));
  vst1q_u16(dst + 13 * stride + 24, vextq_u16(d20[7], d1[0], 5));
  vst1q_u16(dst + 14 * stride + 0, vextq_u16(d20[4], d20[5], 3));
  vst1q_u16(dst + 14 * stride + 8, vextq_u16(d20[5], d20[6], 3));
  vst1q_u16(dst + 14 * stride + 16, vextq_u16(d20[6], d20[7], 3));
  vst1q_u16(dst + 14 * stride + 24, vextq_u16(d20[7], d1[0], 3));
  vst1q_u16(dst + 15 * stride + 0, vextq_u16(d20[4], d20[5], 1));
  vst1q_u16(dst + 15 * stride + 8, vextq_u16(d20[5], d20[6], 1));
  vst1q_u16(dst + 15 * stride + 16, vextq_u16(d20[6], d20[7], 1));
  vst1q_u16(dst + 15 * stride + 24, vextq_u16(d20[7], d1[0], 1));

  vst1q_u16(dst + 16 * stride + 0, vextq_u16(d20[3], d20[4], 7));
  vst1q_u16(dst + 16 * stride + 8, vextq_u16(d20[4], d20[5], 7));
  vst1q_u16(dst + 16 * stride + 16, vextq_u16(d20[5], d20[6], 7));
  vst1q_u16(dst + 16 * stride + 24, vextq_u16(d20[6], d20[7], 7));
  vst1q_u16(dst + 17 * stride + 0, vextq_u16(d20[3], d20[4], 5));
  vst1q_u16(dst + 17 * stride + 8, vextq_u16(d20[4], d20[5], 5));
  vst1q_u16(dst + 17 * stride + 16, vextq_u16(d20[5], d20[6], 5));
  vst1q_u16(dst + 17 * stride + 24, vextq_u16(d20[6], d20[7], 5));
  vst1q_u16(dst + 18 * stride + 0, vextq_u16(d20[3], d20[4], 3));
  vst1q_u16(dst + 18 * stride + 8, vextq_u16(d20[4], d20[5], 3));
  vst1q_u16(dst + 18 * stride + 16, vextq_u16(d20[5], d20[6], 3));
  vst1q_u16(dst + 18 * stride + 24, vextq_u16(d20[6], d20[7], 3));
  vst1q_u16(dst + 19 * stride + 0, vextq_u16(d20[3], d20[4], 1));
  vst1q_u16(dst + 19 * stride + 8, vextq_u16(d20[4], d20[5], 1));
  vst1q_u16(dst + 19 * stride + 16, vextq_u16(d20[5], d20[6], 1));
  vst1q_u16(dst + 19 * stride + 24, vextq_u16(d20[6], d20[7], 1));

  vst1q_u16(dst + 20 * stride + 0, vextq_u16(d20[2], d20[3], 7));
  vst1q_u16(dst + 20 * stride + 8, vextq_u16(d20[3], d20[4], 7));
  vst1q_u16(dst + 20 * stride + 16, vextq_u16(d20[4], d20[5], 7));
  vst1q_u16(dst + 20 * stride + 24, vextq_u16(d20[5], d20[6], 7));
  vst1q_u16(dst + 21 * stride + 0, vextq_u16(d20[2], d20[3], 5));
  vst1q_u16(dst + 21 * stride + 8, vextq_u16(d20[3], d20[4], 5));
  vst1q_u16(dst + 21 * stride + 16, vextq_u16(d20[4], d20[5], 5));
  vst1q_u16(dst + 21 * stride + 24, vextq_u16(d20[5], d20[6], 5));
  vst1q_u16(dst + 22 * stride + 0, vextq_u16(d20[2], d20[3], 3));
  vst1q_u16(dst + 22 * stride + 8, vextq_u16(d20[3], d20[4], 3));
  vst1q_u16(dst + 22 * stride + 16, vextq_u16(d20[4], d20[5], 3));
  vst1q_u16(dst + 22 * stride + 24, vextq_u16(d20[5], d20[6], 3));
  vst1q_u16(dst + 23 * stride + 0, vextq_u16(d20[2], d20[3], 1));
  vst1q_u16(dst + 23 * stride + 8, vextq_u16(d20[3], d20[4], 1));
  vst1q_u16(dst + 23 * stride + 16, vextq_u16(d20[4], d20[5], 1));
  vst1q_u16(dst + 23 * stride + 24, vextq_u16(d20[5], d20[6], 1));

  vst1q_u16(dst + 24 * stride + 0, vextq_u16(d20[1], d20[2], 7));
  vst1q_u16(dst + 24 * stride + 8, vextq_u16(d20[2], d20[3], 7));
  vst1q_u16(dst + 24 * stride + 16, vextq_u16(d20[3], d20[4], 7));
  vst1q_u16(dst + 24 * stride + 24, vextq_u16(d20[4], d20[5], 7));
  vst1q_u16(dst + 25 * stride + 0, vextq_u16(d20[1], d20[2], 5));
  vst1q_u16(dst + 25 * stride + 8, vextq_u16(d20[2], d20[3], 5));
  vst1q_u16(dst + 25 * stride + 16, vextq_u16(d20[3], d20[4], 5));
  vst1q_u16(dst + 25 * stride + 24, vextq_u16(d20[4], d20[5], 5));
  vst1q_u16(dst + 26 * stride + 0, vextq_u16(d20[1], d20[2], 3));
  vst1q_u16(dst + 26 * stride + 8, vextq_u16(d20[2], d20[3], 3));
  vst1q_u16(dst + 26 * stride + 16, vextq_u16(d20[3], d20[4], 3));
  vst1q_u16(dst + 26 * stride + 24, vextq_u16(d20[4], d20[5], 3));
  vst1q_u16(dst + 27 * stride + 0, vextq_u16(d20[1], d20[2], 1));
  vst1q_u16(dst + 27 * stride + 8, vextq_u16(d20[2], d20[3], 1));
  vst1q_u16(dst + 27 * stride + 16, vextq_u16(d20[3], d20[4], 1));
  vst1q_u16(dst + 27 * stride + 24, vextq_u16(d20[4], d20[5], 1));

  vst1q_u16(dst + 28 * stride + 0, vextq_u16(d20[0], d20[1], 7));
  vst1q_u16(dst + 28 * stride + 8, vextq_u16(d20[1], d20[2], 7));
  vst1q_u16(dst + 28 * stride + 16, vextq_u16(d20[2], d20[3], 7));
  vst1q_u16(dst + 28 * stride + 24, vextq_u16(d20[3], d20[4], 7));
  vst1q_u16(dst + 29 * stride + 0, vextq_u16(d20[0], d20[1], 5));
  vst1q_u16(dst + 29 * stride + 8, vextq_u16(d20[1], d20[2], 5));
  vst1q_u16(dst + 29 * stride + 16, vextq_u16(d20[2], d20[3], 5));
  vst1q_u16(dst + 29 * stride + 24, vextq_u16(d20[3], d20[4], 5));
  vst1q_u16(dst + 30 * stride + 0, vextq_u16(d20[0], d20[1], 3));
  vst1q_u16(dst + 30 * stride + 8, vextq_u16(d20[1], d20[2], 3));
  vst1q_u16(dst + 30 * stride + 16, vextq_u16(d20[2], d20[3], 3));
  vst1q_u16(dst + 30 * stride + 24, vextq_u16(d20[3], d20[4], 3));
  vst1q_u16(dst + 31 * stride + 0, vextq_u16(d20[0], d20[1], 1));
  vst1q_u16(dst + 31 * stride + 8, vextq_u16(d20[1], d20[2], 1));
  vst1q_u16(dst + 31 * stride + 16, vextq_u16(d20[2], d20[3], 1));
  vst1q_u16(dst + 31 * stride + 24, vextq_u16(d20[3], d20[4], 1));
}

// -----------------------------------------------------------------------------

void vpx_highbd_d135_predictor_4x4_neon(uint16_t *dst, ptrdiff_t stride,
                                        const uint16_t *above,
                                        const uint16_t *left, int bd) {
  const uint16x8_t XA0123___ = vld1q_u16(above - 1);
  const uint16x4_t L0123 = vld1_u16(left);
  const uint16x4_t L3210 = vrev64_u16(L0123);
  const uint16x8_t L____3210 = vcombine_u16(L0123, L3210);
  const uint16x8_t L3210XA012 = vcombine_u16(L3210, vget_low_u16(XA0123___));
  const uint16x8_t L210XA0123 = vextq_u16(L____3210, XA0123___, 5);
  const uint16x8_t L10XA0123_ = vextq_u16(L____3210, XA0123___, 6);
  const uint16x8_t avg1 = vhaddq_u16(L3210XA012, L10XA0123_);
  const uint16x8_t avg2 = vrhaddq_u16(avg1, L210XA0123);
  const uint16x4_t row_0 = vget_low_u16(avg2);
  const uint16x4_t row_1 = vget_high_u16(avg2);
  const uint16x4_t r0 = vext_u16(row_0, row_1, 3);
  const uint16x4_t r1 = vext_u16(row_0, row_1, 2);
  const uint16x4_t r2 = vext_u16(row_0, row_1, 1);
  (void)bd;
  vst1_u16(dst, r0);
  dst += stride;
  vst1_u16(dst, r1);
  dst += stride;
  vst1_u16(dst, r2);
  dst += stride;
  vst1_u16(dst, row_0);
}

void vpx_highbd_d135_predictor_8x8_neon(uint16_t *dst, ptrdiff_t stride,
                                        const uint16_t *above,
                                        const uint16_t *left, int bd) {
  const uint16x8_t XA0123456 = vld1q_u16(above - 1);
  const uint16x8_t A01234567 = vld1q_u16(above);
  const uint16x8_t A1234567_ = vld1q_u16(above + 1);
  const uint16x8_t L01234567 = vld1q_u16(left);
  const uint16x4_t L3210 = vrev64_u16(vget_low_u16(L01234567));
  const uint16x4_t L7654 = vrev64_u16(vget_high_u16(L01234567));
  const uint16x8_t L76543210 = vcombine_u16(L7654, L3210);
  const uint16x8_t L6543210X = vextq_u16(L76543210, XA0123456, 1);
  const uint16x8_t L543210XA0 = vextq_u16(L76543210, XA0123456, 2);
  const uint16x8_t avg_0 = vhaddq_u16(L76543210, L543210XA0);
  const uint16x8_t avg_1 = vhaddq_u16(XA0123456, A1234567_);
  const uint16x8_t row_0 = vrhaddq_u16(avg_0, L6543210X);
  const uint16x8_t row_1 = vrhaddq_u16(avg_1, A01234567);
  const uint16x8_t r0 = vextq_u16(row_0, row_1, 7);
  const uint16x8_t r1 = vextq_u16(row_0, row_1, 6);
  const uint16x8_t r2 = vextq_u16(row_0, row_1, 5);
  const uint16x8_t r3 = vextq_u16(row_0, row_1, 4);
  const uint16x8_t r4 = vextq_u16(row_0, row_1, 3);
  const uint16x8_t r5 = vextq_u16(row_0, row_1, 2);
  const uint16x8_t r6 = vextq_u16(row_0, row_1, 1);
  (void)bd;
  vst1q_u16(dst, r0);
  dst += stride;
  vst1q_u16(dst, r1);
  dst += stride;
  vst1q_u16(dst, r2);
  dst += stride;
  vst1q_u16(dst, r3);
  dst += stride;
  vst1q_u16(dst, r4);
  dst += stride;
  vst1q_u16(dst, r5);
  dst += stride;
  vst1q_u16(dst, r6);
  dst += stride;
  vst1q_u16(dst, row_0);
}

static INLINE void d135_store_16(uint16_t **dst, const ptrdiff_t stride,
                                 const uint16x8_t row_0,
                                 const uint16x8_t row_1) {
  vst1q_u16(*dst, row_0);
  *dst += 8;
  vst1q_u16(*dst, row_1);
  *dst += stride - 8;
}

void vpx_highbd_d135_predictor_16x16_neon(uint16_t *dst, ptrdiff_t stride,
                                          const uint16_t *above,
                                          const uint16_t *left, int bd) {
  const uint16x8_t L01234567 = vld1q_u16(left);
  const uint16x8_t L89abcdef = vld1q_u16(left + 8);
  const uint16x4_t L3210 = vrev64_u16(vget_low_u16(L01234567));
  const uint16x4_t L7654 = vrev64_u16(vget_high_u16(L01234567));
  const uint16x4_t Lba98 = vrev64_u16(vget_low_u16(L89abcdef));
  const uint16x4_t Lfedc = vrev64_u16(vget_high_u16(L89abcdef));
  const uint16x8_t L76543210 = vcombine_u16(L7654, L3210);
  const uint16x8_t Lfedcba98 = vcombine_u16(Lfedc, Lba98);
  const uint16x8_t Ledcba987 = vextq_u16(Lfedcba98, L76543210, 1);
  const uint16x8_t Ldcba9876 = vextq_u16(Lfedcba98, L76543210, 2);
  const uint16x8_t avg_0 = vhaddq_u16(Lfedcba98, Ldcba9876);
  const uint16x8_t row_0 = vrhaddq_u16(avg_0, Ledcba987);

  const uint16x8_t XA0123456 = vld1q_u16(above - 1);
  const uint16x8_t L6543210X = vextq_u16(L76543210, XA0123456, 1);
  const uint16x8_t L543210XA0 = vextq_u16(L76543210, XA0123456, 2);
  const uint16x8_t avg_1 = vhaddq_u16(L76543210, L543210XA0);
  const uint16x8_t row_1 = vrhaddq_u16(avg_1, L6543210X);

  const uint16x8_t A01234567 = vld1q_u16(above);
  const uint16x8_t A12345678 = vld1q_u16(above + 1);
  const uint16x8_t avg_2 = vhaddq_u16(XA0123456, A12345678);
  const uint16x8_t row_2 = vrhaddq_u16(avg_2, A01234567);

  const uint16x8_t A789abcde = vld1q_u16(above + 7);
  const uint16x8_t A89abcdef = vld1q_u16(above + 8);
  const uint16x8_t A9abcdef_ = vld1q_u16(above + 9);
  const uint16x8_t avg_3 = vhaddq_u16(A789abcde, A9abcdef_);
  const uint16x8_t row_3 = vrhaddq_u16(avg_3, A89abcdef);

  const uint16x8_t r0_0 = vextq_u16(row_1, row_2, 7);
  const uint16x8_t r0_1 = vextq_u16(row_2, row_3, 7);
  const uint16x8_t r1_0 = vextq_u16(row_1, row_2, 6);
  const uint16x8_t r1_1 = vextq_u16(row_2, row_3, 6);
  const uint16x8_t r2_0 = vextq_u16(row_1, row_2, 5);
  const uint16x8_t r2_1 = vextq_u16(row_2, row_3, 5);
  const uint16x8_t r3_0 = vextq_u16(row_1, row_2, 4);
  const uint16x8_t r3_1 = vextq_u16(row_2, row_3, 4);
  const uint16x8_t r4_0 = vextq_u16(row_1, row_2, 3);
  const uint16x8_t r4_1 = vextq_u16(row_2, row_3, 3);
  const uint16x8_t r5_0 = vextq_u16(row_1, row_2, 2);
  const uint16x8_t r5_1 = vextq_u16(row_2, row_3, 2);
  const uint16x8_t r6_0 = vextq_u16(row_1, row_2, 1);
  const uint16x8_t r6_1 = vextq_u16(row_2, row_3, 1);
  const uint16x8_t r8_0 = vextq_u16(row_0, row_1, 7);
  const uint16x8_t r9_0 = vextq_u16(row_0, row_1, 6);
  const uint16x8_t ra_0 = vextq_u16(row_0, row_1, 5);
  const uint16x8_t rb_0 = vextq_u16(row_0, row_1, 4);
  const uint16x8_t rc_0 = vextq_u16(row_0, row_1, 3);
  const uint16x8_t rd_0 = vextq_u16(row_0, row_1, 2);
  const uint16x8_t re_0 = vextq_u16(row_0, row_1, 1);
  (void)bd;

  d135_store_16(&dst, stride, r0_0, r0_1);
  d135_store_16(&dst, stride, r1_0, r1_1);
  d135_store_16(&dst, stride, r2_0, r2_1);
  d135_store_16(&dst, stride, r3_0, r3_1);
  d135_store_16(&dst, stride, r4_0, r4_1);
  d135_store_16(&dst, stride, r5_0, r5_1);
  d135_store_16(&dst, stride, r6_0, r6_1);
  d135_store_16(&dst, stride, row_1, row_2);
  d135_store_16(&dst, stride, r8_0, r0_0);
  d135_store_16(&dst, stride, r9_0, r1_0);
  d135_store_16(&dst, stride, ra_0, r2_0);
  d135_store_16(&dst, stride, rb_0, r3_0);
  d135_store_16(&dst, stride, rc_0, r4_0);
  d135_store_16(&dst, stride, rd_0, r5_0);
  d135_store_16(&dst, stride, re_0, r6_0);
  vst1q_u16(dst, row_0);
  dst += 8;
  vst1q_u16(dst, row_1);
}

void vpx_highbd_d135_predictor_32x32_neon(uint16_t *dst, ptrdiff_t stride,
                                          const uint16_t *above,
                                          const uint16_t *left, int bd) {
  const uint16x8_t LL01234567 = vld1q_u16(left + 16);
  const uint16x8_t LL89abcdef = vld1q_u16(left + 24);
  const uint16x4_t LL3210 = vrev64_u16(vget_low_u16(LL01234567));
  const uint16x4_t LL7654 = vrev64_u16(vget_high_u16(LL01234567));
  const uint16x4_t LLba98 = vrev64_u16(vget_low_u16(LL89abcdef));
  const uint16x4_t LLfedc = vrev64_u16(vget_high_u16(LL89abcdef));
  const uint16x8_t LL76543210 = vcombine_u16(LL7654, LL3210);
  const uint16x8_t LLfedcba98 = vcombine_u16(LLfedc, LLba98);
  const uint16x8_t LLedcba987 = vextq_u16(LLfedcba98, LL76543210, 1);
  const uint16x8_t LLdcba9876 = vextq_u16(LLfedcba98, LL76543210, 2);
  const uint16x8_t avg_0 = vhaddq_u16(LLfedcba98, LLdcba9876);
  uint16x8_t row_0 = vrhaddq_u16(avg_0, LLedcba987);

  const uint16x8_t LU01234567 = vld1q_u16(left);
  const uint16x8_t LU89abcdef = vld1q_u16(left + 8);
  const uint16x4_t LU3210 = vrev64_u16(vget_low_u16(LU01234567));
  const uint16x4_t LU7654 = vrev64_u16(vget_high_u16(LU01234567));
  const uint16x4_t LUba98 = vrev64_u16(vget_low_u16(LU89abcdef));
  const uint16x4_t LUfedc = vrev64_u16(vget_high_u16(LU89abcdef));
  const uint16x8_t LU76543210 = vcombine_u16(LU7654, LU3210);
  const uint16x8_t LUfedcba98 = vcombine_u16(LUfedc, LUba98);
  const uint16x8_t LL6543210Uf = vextq_u16(LL76543210, LUfedcba98, 1);
  const uint16x8_t LL543210Ufe = vextq_u16(LL76543210, LUfedcba98, 2);
  const uint16x8_t avg_1 = vhaddq_u16(LL76543210, LL543210Ufe);
  uint16x8_t row_1 = vrhaddq_u16(avg_1, LL6543210Uf);

  const uint16x8_t LUedcba987 = vextq_u16(LUfedcba98, LU76543210, 1);
  const uint16x8_t LUdcba9876 = vextq_u16(LUfedcba98, LU76543210, 2);
  const uint16x8_t avg_2 = vhaddq_u16(LUfedcba98, LUdcba9876);
  uint16x8_t row_2 = vrhaddq_u16(avg_2, LUedcba987);

  const uint16x8_t XAL0123456 = vld1q_u16(above - 1);
  const uint16x8_t LU6543210X = vextq_u16(LU76543210, XAL0123456, 1);
  const uint16x8_t LU543210XA0 = vextq_u16(LU76543210, XAL0123456, 2);
  const uint16x8_t avg_3 = vhaddq_u16(LU76543210, LU543210XA0);
  uint16x8_t row_3 = vrhaddq_u16(avg_3, LU6543210X);

  const uint16x8_t AL01234567 = vld1q_u16(above);
  const uint16x8_t AL12345678 = vld1q_u16(above + 1);
  const uint16x8_t avg_4 = vhaddq_u16(XAL0123456, AL12345678);
  uint16x8_t row_4 = vrhaddq_u16(avg_4, AL01234567);

  const uint16x8_t AL789abcde = vld1q_u16(above + 7);
  const uint16x8_t AL89abcdef = vld1q_u16(above + 8);
  const uint16x8_t AL9abcdefg = vld1q_u16(above + 9);
  const uint16x8_t avg_5 = vhaddq_u16(AL789abcde, AL9abcdefg);
  uint16x8_t row_5 = vrhaddq_u16(avg_5, AL89abcdef);

  const uint16x8_t ALfR0123456 = vld1q_u16(above + 15);
  const uint16x8_t AR01234567 = vld1q_u16(above + 16);
  const uint16x8_t AR12345678 = vld1q_u16(above + 17);
  const uint16x8_t avg_6 = vhaddq_u16(ALfR0123456, AR12345678);
  uint16x8_t row_6 = vrhaddq_u16(avg_6, AR01234567);

  const uint16x8_t AR789abcde = vld1q_u16(above + 23);
  const uint16x8_t AR89abcdef = vld1q_u16(above + 24);
  const uint16x8_t AR9abcdef_ = vld1q_u16(above + 25);
  const uint16x8_t avg_7 = vhaddq_u16(AR789abcde, AR9abcdef_);
  uint16x8_t row_7 = vrhaddq_u16(avg_7, AR89abcdef);
  int i, j;
  (void)bd;

  dst += 31 * stride;
  for (i = 0; i < 4; ++i) {
    for (j = 0; j < 8; ++j) {
      vst1q_u16(dst, row_0);
      dst += 8;
      vst1q_u16(dst, row_1);
      dst += 8;
      vst1q_u16(dst, row_2);
      dst += 8;
      vst1q_u16(dst, row_3);
      dst -= stride + 24;
      row_0 = vextq_u16(row_0, row_1, 1);
      row_1 = vextq_u16(row_1, row_2, 1);
      row_2 = vextq_u16(row_2, row_3, 1);
      row_3 = vextq_u16(row_3, row_4, 1);
      row_4 = vextq_u16(row_4, row_4, 1);
    }
    row_4 = row_5;
    row_5 = row_6;
    row_6 = row_7;
  }
}

//------------------------------------------------------------------------------

void vpx_highbd_d207_predictor_4x4_neon(uint16_t *dst, ptrdiff_t stride,
                                        const uint16_t *above,
                                        const uint16_t *left, int bd) {
  uint16x4_t l0, l1, l2, l3, c0, c1, c01_lo, c01_hi;
  (void)above;
  (void)bd;

  l0 = vld1_u16(left + 0);
  l3 = vld1_dup_u16(left + 3);

  // [ left[1], left[2], left[3], left[3] ]
  l1 = vext_u16(l0, l3, 1);
  // [ left[2], left[3], left[3], left[3] ]
  l2 = vext_u16(l0, l3, 2);

  c0 = vrhadd_u16(l0, l1);
  c1 = vrhadd_u16(vhadd_u16(l0, l2), l1);

  c01_lo = vzip_u16(c0, c1).val[0];
  c01_hi = vzip_u16(c0, c1).val[1];

  // stride=0 [ c0[0], c1[0],   c0[1],   c1[1] ]
  // stride=1 [ c0[1], c1[1],   c0[2],   c1[2] ]
  // stride=2 [ c0[2], c1[2],   c0[3],   c1[3] ]
  // stride=3 [ c0[3], c1[3], left[3], left[3] ]
  vst1_u16(dst + 0 * stride, c01_lo);
  vst1_u16(dst + 1 * stride, vext_u16(c01_lo, c01_hi, 2));
  vst1_u16(dst + 2 * stride, c01_hi);
  vst1_u16(dst + 3 * stride, vext_u16(c01_hi, l3, 2));
}

void vpx_highbd_d207_predictor_8x8_neon(uint16_t *dst, ptrdiff_t stride,
                                        const uint16_t *above,
                                        const uint16_t *left, int bd) {
  uint16x8_t l0, l1, l2, l7, c0, c1, c01_lo, c01_hi;
  (void)above;
  (void)bd;

  l0 = vld1q_u16(left + 0);
  l7 = vld1q_dup_u16(left + 7);

  // [ left[1], left[2], left[3], left[4], left[5], left[6], left[7], left[7] ]
  l1 = vextq_u16(l0, l7, 1);
  // [ left[2], left[3], left[4], left[5], left[6], left[7], left[7], left[7] ]
  l2 = vextq_u16(l0, l7, 2);

  c0 = vrhaddq_u16(l0, l1);
  c1 = vrhaddq_u16(vhaddq_u16(l0, l2), l1);

  c01_lo = vzipq_u16(c0, c1).val[0];
  c01_hi = vzipq_u16(c0, c1).val[1];

  vst1q_u16(dst + 0 * stride, c01_lo);
  vst1q_u16(dst + 1 * stride, vextq_u16(c01_lo, c01_hi, 2));
  vst1q_u16(dst + 2 * stride, vextq_u16(c01_lo, c01_hi, 4));
  vst1q_u16(dst + 3 * stride, vextq_u16(c01_lo, c01_hi, 6));
  vst1q_u16(dst + 4 * stride, c01_hi);
  vst1q_u16(dst + 5 * stride, vextq_u16(c01_hi, l7, 2));
  vst1q_u16(dst + 6 * stride, vextq_u16(c01_hi, l7, 4));
  vst1q_u16(dst + 7 * stride, vextq_u16(c01_hi, l7, 6));
}

void vpx_highbd_d207_predictor_16x16_neon(uint16_t *dst, ptrdiff_t stride,
                                          const uint16_t *above,
                                          const uint16_t *left, int bd) {
  uint16x8_t l0, l1, l2, l8, l9, l10, l15, c0[2], c1[2], c01[4];
  (void)above;
  (void)bd;

  l0 = vld1q_u16(left + 0);
  l1 = vld1q_u16(left + 1);
  l2 = vld1q_u16(left + 2);
  l8 = vld1q_u16(left + 8);
  l15 = vld1q_dup_u16(left + 15);

  l9 = vextq_u16(l8, l15, 1);
  l10 = vextq_u16(l8, l15, 2);

  c0[0] = vrhaddq_u16(l0, l1);
  c0[1] = vrhaddq_u16(l8, l9);
  c1[0] = vrhaddq_u16(vhaddq_u16(l0, l2), l1);
  c1[1] = vrhaddq_u16(vhaddq_u16(l8, l10), l9);

  c01[0] = vzipq_u16(c0[0], c1[0]).val[0];
  c01[1] = vzipq_u16(c0[0], c1[0]).val[1];
  c01[2] = vzipq_u16(c0[1], c1[1]).val[0];
  c01[3] = vzipq_u16(c0[1], c1[1]).val[1];

  vst1q_u16(dst + 0 * stride + 0, c01[0]);
  vst1q_u16(dst + 0 * stride + 8, c01[1]);
  vst1q_u16(dst + 1 * stride + 0, vextq_u16(c01[0], c01[1], 2));
  vst1q_u16(dst + 1 * stride + 8, vextq_u16(c01[1], c01[2], 2));
  vst1q_u16(dst + 2 * stride + 0, vextq_u16(c01[0], c01[1], 4));
  vst1q_u16(dst + 2 * stride + 8, vextq_u16(c01[1], c01[2], 4));
  vst1q_u16(dst + 3 * stride + 0, vextq_u16(c01[0], c01[1], 6));
  vst1q_u16(dst + 3 * stride + 8, vextq_u16(c01[1], c01[2], 6));

  vst1q_u16(dst + 4 * stride + 0, c01[1]);
  vst1q_u16(dst + 4 * stride + 8, c01[2]);
  vst1q_u16(dst + 5 * stride + 0, vextq_u16(c01[1], c01[2], 2));
  vst1q_u16(dst + 5 * stride + 8, vextq_u16(c01[2], c01[3], 2));
  vst1q_u16(dst + 6 * stride + 0, vextq_u16(c01[1], c01[2], 4));
  vst1q_u16(dst + 6 * stride + 8, vextq_u16(c01[2], c01[3], 4));
  vst1q_u16(dst + 7 * stride + 0, vextq_u16(c01[1], c01[2], 6));
  vst1q_u16(dst + 7 * stride + 8, vextq_u16(c01[2], c01[3], 6));

  vst1q_u16(dst + 8 * stride + 0, c01[2]);
  vst1q_u16(dst + 8 * stride + 8, c01[3]);
  vst1q_u16(dst + 9 * stride + 0, vextq_u16(c01[2], c01[3], 2));
  vst1q_u16(dst + 9 * stride + 8, vextq_u16(c01[3], l15, 2));
  vst1q_u16(dst + 10 * stride + 0, vextq_u16(c01[2], c01[3], 4));
  vst1q_u16(dst + 10 * stride + 8, vextq_u16(c01[3], l15, 4));
  vst1q_u16(dst + 11 * stride + 0, vextq_u16(c01[2], c01[3], 6));
  vst1q_u16(dst + 11 * stride + 8, vextq_u16(c01[3], l15, 6));

  vst1q_u16(dst + 12 * stride + 0, c01[3]);
  vst1q_u16(dst + 12 * stride + 8, l15);
  vst1q_u16(dst + 13 * stride + 0, vextq_u16(c01[3], l15, 2));
  vst1q_u16(dst + 13 * stride + 8, l15);
  vst1q_u16(dst + 14 * stride + 0, vextq_u16(c01[3], l15, 4));
  vst1q_u16(dst + 14 * stride + 8, l15);
  vst1q_u16(dst + 15 * stride + 0, vextq_u16(c01[3], l15, 6));
  vst1q_u16(dst + 15 * stride + 8, l15);
}

void vpx_highbd_d207_predictor_32x32_neon(uint16_t *dst, ptrdiff_t stride,
                                          const uint16_t *above,
                                          const uint16_t *left, int bd) {
  uint16x8_t l0, l1, l2, l8, l9, l10, l16, l17, l18, l24, l25, l26, l31, c0[4],
      c1[4], c01[8];
  (void)above;
  (void)bd;

  l0 = vld1q_u16(left + 0);
  l1 = vld1q_u16(left + 1);
  l2 = vld1q_u16(left + 2);
  l8 = vld1q_u16(left + 8);
  l9 = vld1q_u16(left + 9);
  l10 = vld1q_u16(left + 10);
  l16 = vld1q_u16(left + 16);
  l17 = vld1q_u16(left + 17);
  l18 = vld1q_u16(left + 18);
  l24 = vld1q_u16(left + 24);
  l31 = vld1q_dup_u16(left + 31);

  l25 = vextq_u16(l24, l31, 1);
  l26 = vextq_u16(l24, l31, 2);

  c0[0] = vrhaddq_u16(l0, l1);
  c0[1] = vrhaddq_u16(l8, l9);
  c0[2] = vrhaddq_u16(l16, l17);
  c0[3] = vrhaddq_u16(l24, l25);
  c1[0] = vrhaddq_u16(vhaddq_u16(l0, l2), l1);
  c1[1] = vrhaddq_u16(vhaddq_u16(l8, l10), l9);
  c1[2] = vrhaddq_u16(vhaddq_u16(l16, l18), l17);
  c1[3] = vrhaddq_u16(vhaddq_u16(l24, l26), l25);

  c01[0] = vzipq_u16(c0[0], c1[0]).val[0];
  c01[1] = vzipq_u16(c0[0], c1[0]).val[1];
  c01[2] = vzipq_u16(c0[1], c1[1]).val[0];
  c01[3] = vzipq_u16(c0[1], c1[1]).val[1];
  c01[4] = vzipq_u16(c0[2], c1[2]).val[0];
  c01[5] = vzipq_u16(c0[2], c1[2]).val[1];
  c01[6] = vzipq_u16(c0[3], c1[3]).val[0];
  c01[7] = vzipq_u16(c0[3], c1[3]).val[1];

  vst1q_u16(dst + 0 * stride + 0, c01[0]);
  vst1q_u16(dst + 0 * stride + 8, c01[1]);
  vst1q_u16(dst + 0 * stride + 16, c01[2]);
  vst1q_u16(dst + 0 * stride + 24, c01[3]);
  vst1q_u16(dst + 1 * stride + 0, vextq_u16(c01[0], c01[1], 2));
  vst1q_u16(dst + 1 * stride + 8, vextq_u16(c01[1], c01[2], 2));
  vst1q_u16(dst + 1 * stride + 16, vextq_u16(c01[2], c01[3], 2));
  vst1q_u16(dst + 1 * stride + 24, vextq_u16(c01[3], c01[4], 2));
  vst1q_u16(dst + 2 * stride + 0, vextq_u16(c01[0], c01[1], 4));
  vst1q_u16(dst + 2 * stride + 8, vextq_u16(c01[1], c01[2], 4));
  vst1q_u16(dst + 2 * stride + 16, vextq_u16(c01[2], c01[3], 4));
  vst1q_u16(dst + 2 * stride + 24, vextq_u16(c01[3], c01[4], 4));
  vst1q_u16(dst + 3 * stride + 0, vextq_u16(c01[0], c01[1], 6));
  vst1q_u16(dst + 3 * stride + 8, vextq_u16(c01[1], c01[2], 6));
  vst1q_u16(dst + 3 * stride + 16, vextq_u16(c01[2], c01[3], 6));
  vst1q_u16(dst + 3 * stride + 24, vextq_u16(c01[3], c01[4], 6));

  vst1q_u16(dst + 4 * stride + 0, c01[1]);
  vst1q_u16(dst + 4 * stride + 8, c01[2]);
  vst1q_u16(dst + 4 * stride + 16, c01[3]);
  vst1q_u16(dst + 4 * stride + 24, c01[4]);
  vst1q_u16(dst + 5 * stride + 0, vextq_u16(c01[1], c01[2], 2));
  vst1q_u16(dst + 5 * stride + 8, vextq_u16(c01[2], c01[3], 2));
  vst1q_u16(dst + 5 * stride + 16, vextq_u16(c01[3], c01[4], 2));
  vst1q_u16(dst + 5 * stride + 24, vextq_u16(c01[4], c01[5], 2));
  vst1q_u16(dst + 6 * stride + 0, vextq_u16(c01[1], c01[2], 4));
  vst1q_u16(dst + 6 * stride + 8, vextq_u16(c01[2], c01[3], 4));
  vst1q_u16(dst + 6 * stride + 16, vextq_u16(c01[3], c01[4], 4));
  vst1q_u16(dst + 6 * stride + 24, vextq_u16(c01[4], c01[5], 4));
  vst1q_u16(dst + 7 * stride + 0, vextq_u16(c01[1], c01[2], 6));
  vst1q_u16(dst + 7 * stride + 8, vextq_u16(c01[2], c01[3], 6));
  vst1q_u16(dst + 7 * stride + 16, vextq_u16(c01[3], c01[4], 6));
  vst1q_u16(dst + 7 * stride + 24, vextq_u16(c01[4], c01[5], 6));

  vst1q_u16(dst + 8 * stride + 0, c01[2]);
  vst1q_u16(dst + 8 * stride + 8, c01[3]);
  vst1q_u16(dst + 8 * stride + 16, c01[4]);
  vst1q_u16(dst + 8 * stride + 24, c01[5]);
  vst1q_u16(dst + 9 * stride + 0, vextq_u16(c01[2], c01[3], 2));
  vst1q_u16(dst + 9 * stride + 8, vextq_u16(c01[3], c01[4], 2));
  vst1q_u16(dst + 9 * stride + 16, vextq_u16(c01[4], c01[5], 2));
  vst1q_u16(dst + 9 * stride + 24, vextq_u16(c01[5], c01[6], 2));
  vst1q_u16(dst + 10 * stride + 0, vextq_u16(c01[2], c01[3], 4));
  vst1q_u16(dst + 10 * stride + 8, vextq_u16(c01[3], c01[4], 4));
  vst1q_u16(dst + 10 * stride + 16, vextq_u16(c01[4], c01[5], 4));
  vst1q_u16(dst + 10 * stride + 24, vextq_u16(c01[5], c01[6], 4));
  vst1q_u16(dst + 11 * stride + 0, vextq_u16(c01[2], c01[3], 6));
  vst1q_u16(dst + 11 * stride + 8, vextq_u16(c01[3], c01[4], 6));
  vst1q_u16(dst + 11 * stride + 16, vextq_u16(c01[4], c01[5], 6));
  vst1q_u16(dst + 11 * stride + 24, vextq_u16(c01[5], c01[6], 6));

  vst1q_u16(dst + 12 * stride + 0, c01[3]);
  vst1q_u16(dst + 12 * stride + 8, c01[4]);
  vst1q_u16(dst + 12 * stride + 16, c01[5]);
  vst1q_u16(dst + 12 * stride + 24, c01[6]);
  vst1q_u16(dst + 13 * stride + 0, vextq_u16(c01[3], c01[4], 2));
  vst1q_u16(dst + 13 * stride + 8, vextq_u16(c01[4], c01[5], 2));
  vst1q_u16(dst + 13 * stride + 16, vextq_u16(c01[5], c01[6], 2));
  vst1q_u16(dst + 13 * stride + 24, vextq_u16(c01[6], c01[7], 2));
  vst1q_u16(dst + 14 * stride + 0, vextq_u16(c01[3], c01[4], 4));
  vst1q_u16(dst + 14 * stride + 8, vextq_u16(c01[4], c01[5], 4));
  vst1q_u16(dst + 14 * stride + 16, vextq_u16(c01[5], c01[6], 4));
  vst1q_u16(dst + 14 * stride + 24, vextq_u16(c01[6], c01[7], 4));
  vst1q_u16(dst + 15 * stride + 0, vextq_u16(c01[3], c01[4], 6));
  vst1q_u16(dst + 15 * stride + 8, vextq_u16(c01[4], c01[5], 6));
  vst1q_u16(dst + 15 * stride + 16, vextq_u16(c01[5], c01[6], 6));
  vst1q_u16(dst + 15 * stride + 24, vextq_u16(c01[6], c01[7], 6));

  vst1q_u16(dst + 16 * stride + 0, c01[4]);
  vst1q_u16(dst + 16 * stride + 8, c01[5]);
  vst1q_u16(dst + 16 * stride + 16, c01[6]);
  vst1q_u16(dst + 16 * stride + 24, c01[7]);
  vst1q_u16(dst + 17 * stride + 0, vextq_u16(c01[4], c01[5], 2));
  vst1q_u16(dst + 17 * stride + 8, vextq_u16(c01[5], c01[6], 2));
  vst1q_u16(dst + 17 * stride + 16, vextq_u16(c01[6], c01[7], 2));
  vst1q_u16(dst + 17 * stride + 24, vextq_u16(c01[7], l31, 2));
  vst1q_u16(dst + 18 * stride + 0, vextq_u16(c01[4], c01[5], 4));
  vst1q_u16(dst + 18 * stride + 8, vextq_u16(c01[5], c01[6], 4));
  vst1q_u16(dst + 18 * stride + 16, vextq_u16(c01[6], c01[7], 4));
  vst1q_u16(dst + 18 * stride + 24, vextq_u16(c01[7], l31, 4));
  vst1q_u16(dst + 19 * stride + 0, vextq_u16(c01[4], c01[5], 6));
  vst1q_u16(dst + 19 * stride + 8, vextq_u16(c01[5], c01[6], 6));
  vst1q_u16(dst + 19 * stride + 16, vextq_u16(c01[6], c01[7], 6));
  vst1q_u16(dst + 19 * stride + 24, vextq_u16(c01[7], l31, 6));

  vst1q_u16(dst + 20 * stride + 0, c01[5]);
  vst1q_u16(dst + 20 * stride + 8, c01[6]);
  vst1q_u16(dst + 20 * stride + 16, c01[7]);
  vst1q_u16(dst + 20 * stride + 24, l31);
  vst1q_u16(dst + 21 * stride + 0, vextq_u16(c01[5], c01[6], 2));
  vst1q_u16(dst + 21 * stride + 8, vextq_u16(c01[6], c01[7], 2));
  vst1q_u16(dst + 21 * stride + 16, vextq_u16(c01[7], l31, 2));
  vst1q_u16(dst + 21 * stride + 24, vextq_u16(l31, l31, 2));
  vst1q_u16(dst + 22 * stride + 0, vextq_u16(c01[5], c01[6], 4));
  vst1q_u16(dst + 22 * stride + 8, vextq_u16(c01[6], c01[7], 4));
  vst1q_u16(dst + 22 * stride + 16, vextq_u16(c01[7], l31, 4));
  vst1q_u16(dst + 22 * stride + 24, vextq_u16(l31, l31, 4));
  vst1q_u16(dst + 23 * stride + 0, vextq_u16(c01[5], c01[6], 6));
  vst1q_u16(dst + 23 * stride + 8, vextq_u16(c01[6], c01[7], 6));
  vst1q_u16(dst + 23 * stride + 16, vextq_u16(c01[7], l31, 6));
  vst1q_u16(dst + 23 * stride + 24, vextq_u16(l31, l31, 6));

  vst1q_u16(dst + 24 * stride + 0, c01[6]);
  vst1q_u16(dst + 24 * stride + 8, c01[7]);
  vst1q_u16(dst + 24 * stride + 16, l31);
  vst1q_u16(dst + 24 * stride + 24, l31);
  vst1q_u16(dst + 25 * stride + 0, vextq_u16(c01[6], c01[7], 2));
  vst1q_u16(dst + 25 * stride + 8, vextq_u16(c01[7], l31, 2));
  vst1q_u16(dst + 25 * stride + 16, vextq_u16(l31, l31, 2));
  vst1q_u16(dst + 25 * stride + 24, vextq_u16(l31, l31, 2));
  vst1q_u16(dst + 26 * stride + 0, vextq_u16(c01[6], c01[7], 4));
  vst1q_u16(dst + 26 * stride + 8, vextq_u16(c01[7], l31, 4));
  vst1q_u16(dst + 26 * stride + 16, vextq_u16(l31, l31, 4));
  vst1q_u16(dst + 26 * stride + 24, vextq_u16(l31, l31, 4));
  vst1q_u16(dst + 27 * stride + 0, vextq_u16(c01[6], c01[7], 6));
  vst1q_u16(dst + 27 * stride + 8, vextq_u16(c01[7], l31, 6));
  vst1q_u16(dst + 27 * stride + 16, vextq_u16(l31, l31, 6));
  vst1q_u16(dst + 27 * stride + 24, vextq_u16(l31, l31, 6));

  vst1q_u16(dst + 28 * stride + 0, c01[7]);
  vst1q_u16(dst + 28 * stride + 8, l31);
  vst1q_u16(dst + 28 * stride + 16, l31);
  vst1q_u16(dst + 28 * stride + 24, l31);
  vst1q_u16(dst + 29 * stride + 0, vextq_u16(c01[7], l31, 2));
  vst1q_u16(dst + 29 * stride + 8, vextq_u16(l31, l31, 2));
  vst1q_u16(dst + 29 * stride + 16, vextq_u16(l31, l31, 2));
  vst1q_u16(dst + 29 * stride + 24, vextq_u16(l31, l31, 2));
  vst1q_u16(dst + 30 * stride + 0, vextq_u16(c01[7], l31, 4));
  vst1q_u16(dst + 30 * stride + 8, vextq_u16(l31, l31, 4));
  vst1q_u16(dst + 30 * stride + 16, vextq_u16(l31, l31, 4));
  vst1q_u16(dst + 30 * stride + 24, vextq_u16(l31, l31, 4));
  vst1q_u16(dst + 31 * stride + 0, vextq_u16(c01[7], l31, 6));
  vst1q_u16(dst + 31 * stride + 8, vextq_u16(l31, l31, 6));
  vst1q_u16(dst + 31 * stride + 16, vextq_u16(l31, l31, 6));
  vst1q_u16(dst + 31 * stride + 24, vextq_u16(l31, l31, 6));
}

//------------------------------------------------------------------------------

void vpx_highbd_v_predictor_4x4_neon(uint16_t *dst, ptrdiff_t stride,
                                     const uint16_t *above,
                                     const uint16_t *left, int bd) {
  const uint16x4_t row = vld1_u16(above);
  int i;
  (void)left;
  (void)bd;

  for (i = 0; i < 4; i++, dst += stride) {
    vst1_u16(dst, row);
  }
}

void vpx_highbd_v_predictor_8x8_neon(uint16_t *dst, ptrdiff_t stride,
                                     const uint16_t *above,
                                     const uint16_t *left, int bd) {
  const uint16x8_t row = vld1q_u16(above);
  int i;
  (void)left;
  (void)bd;

  for (i = 0; i < 8; i++, dst += stride) {
    vst1q_u16(dst, row);
  }
}

void vpx_highbd_v_predictor_16x16_neon(uint16_t *dst, ptrdiff_t stride,
                                       const uint16_t *above,
                                       const uint16_t *left, int bd) {
  const uint16x8_t row0 = vld1q_u16(above + 0);
  const uint16x8_t row1 = vld1q_u16(above + 8);
  int i;
  (void)left;
  (void)bd;

  for (i = 0; i < 16; i++) {
    vst1q_u16(dst + 0, row0);
    vst1q_u16(dst + 8, row1);
    dst += stride;
  }
}

void vpx_highbd_v_predictor_32x32_neon(uint16_t *dst, ptrdiff_t stride,
                                       const uint16_t *above,
                                       const uint16_t *left, int bd) {
  const uint16x8_t row0 = vld1q_u16(above + 0);
  const uint16x8_t row1 = vld1q_u16(above + 8);
  const uint16x8_t row2 = vld1q_u16(above + 16);
  const uint16x8_t row3 = vld1q_u16(above + 24);
  int i;
  (void)left;
  (void)bd;

  for (i = 0; i < 32; i++) {
    vst1q_u16(dst + 0, row0);
    vst1q_u16(dst + 8, row1);
    vst1q_u16(dst + 16, row2);
    vst1q_u16(dst + 24, row3);
    dst += stride;
  }
}

// -----------------------------------------------------------------------------

void vpx_highbd_h_predictor_4x4_neon(uint16_t *dst, ptrdiff_t stride,
                                     const uint16_t *above,
                                     const uint16_t *left, int bd) {
  const uint16x4_t left_u16 = vld1_u16(left);
  uint16x4_t row;
  (void)above;
  (void)bd;

  row = vdup_lane_u16(left_u16, 0);
  vst1_u16(dst, row);
  dst += stride;
  row = vdup_lane_u16(left_u16, 1);
  vst1_u16(dst, row);
  dst += stride;
  row = vdup_lane_u16(left_u16, 2);
  vst1_u16(dst, row);
  dst += stride;
  row = vdup_lane_u16(left_u16, 3);
  vst1_u16(dst, row);
}

void vpx_highbd_h_predictor_8x8_neon(uint16_t *dst, ptrdiff_t stride,
                                     const uint16_t *above,
                                     const uint16_t *left, int bd) {
  const uint16x8_t left_u16 = vld1q_u16(left);
  const uint16x4_t left_low = vget_low_u16(left_u16);
  const uint16x4_t left_high = vget_high_u16(left_u16);
  uint16x8_t row;
  (void)above;
  (void)bd;

  row = vdupq_lane_u16(left_low, 0);
  vst1q_u16(dst, row);
  dst += stride;
  row = vdupq_lane_u16(left_low, 1);
  vst1q_u16(dst, row);
  dst += stride;
  row = vdupq_lane_u16(left_low, 2);
  vst1q_u16(dst, row);
  dst += stride;
  row = vdupq_lane_u16(left_low, 3);
  vst1q_u16(dst, row);
  dst += stride;
  row = vdupq_lane_u16(left_high, 0);
  vst1q_u16(dst, row);
  dst += stride;
  row = vdupq_lane_u16(left_high, 1);
  vst1q_u16(dst, row);
  dst += stride;
  row = vdupq_lane_u16(left_high, 2);
  vst1q_u16(dst, row);
  dst += stride;
  row = vdupq_lane_u16(left_high, 3);
  vst1q_u16(dst, row);
}

static INLINE void h_store_16(uint16_t **dst, const ptrdiff_t stride,
                              const uint16x8_t row) {
  // Note: vst1q is faster than vst2q
  vst1q_u16(*dst, row);
  *dst += 8;
  vst1q_u16(*dst, row);
  *dst += stride - 8;
}

void vpx_highbd_h_predictor_16x16_neon(uint16_t *dst, ptrdiff_t stride,
                                       const uint16_t *above,
                                       const uint16_t *left, int bd) {
  int i;
  (void)above;
  (void)bd;

  for (i = 0; i < 2; i++, left += 8) {
    const uint16x8_t left_u16q = vld1q_u16(left);
    const uint16x4_t left_low = vget_low_u16(left_u16q);
    const uint16x4_t left_high = vget_high_u16(left_u16q);
    uint16x8_t row;

    row = vdupq_lane_u16(left_low, 0);
    h_store_16(&dst, stride, row);
    row = vdupq_lane_u16(left_low, 1);
    h_store_16(&dst, stride, row);
    row = vdupq_lane_u16(left_low, 2);
    h_store_16(&dst, stride, row);
    row = vdupq_lane_u16(left_low, 3);
    h_store_16(&dst, stride, row);
    row = vdupq_lane_u16(left_high, 0);
    h_store_16(&dst, stride, row);
    row = vdupq_lane_u16(left_high, 1);
    h_store_16(&dst, stride, row);
    row = vdupq_lane_u16(left_high, 2);
    h_store_16(&dst, stride, row);
    row = vdupq_lane_u16(left_high, 3);
    h_store_16(&dst, stride, row);
  }
}

static INLINE void h_store_32(uint16_t **dst, const ptrdiff_t stride,
                              const uint16x8_t row) {
  // Note: vst1q is faster than vst2q
  vst1q_u16(*dst, row);
  *dst += 8;
  vst1q_u16(*dst, row);
  *dst += 8;
  vst1q_u16(*dst, row);
  *dst += 8;
  vst1q_u16(*dst, row);
  *dst += stride - 24;
}

void vpx_highbd_h_predictor_32x32_neon(uint16_t *dst, ptrdiff_t stride,
                                       const uint16_t *above,
                                       const uint16_t *left, int bd) {
  int i;
  (void)above;
  (void)bd;

  for (i = 0; i < 4; i++, left += 8) {
    const uint16x8_t left_u16q = vld1q_u16(left);
    const uint16x4_t left_low = vget_low_u16(left_u16q);
    const uint16x4_t left_high = vget_high_u16(left_u16q);
    uint16x8_t row;

    row = vdupq_lane_u16(left_low, 0);
    h_store_32(&dst, stride, row);
    row = vdupq_lane_u16(left_low, 1);
    h_store_32(&dst, stride, row);
    row = vdupq_lane_u16(left_low, 2);
    h_store_32(&dst, stride, row);
    row = vdupq_lane_u16(left_low, 3);
    h_store_32(&dst, stride, row);
    row = vdupq_lane_u16(left_high, 0);
    h_store_32(&dst, stride, row);
    row = vdupq_lane_u16(left_high, 1);
    h_store_32(&dst, stride, row);
    row = vdupq_lane_u16(left_high, 2);
    h_store_32(&dst, stride, row);
    row = vdupq_lane_u16(left_high, 3);
    h_store_32(&dst, stride, row);
  }
}

// -----------------------------------------------------------------------------

void vpx_highbd_tm_predictor_4x4_neon(uint16_t *dst, ptrdiff_t stride,
                                      const uint16_t *above,
                                      const uint16_t *left, int bd) {
  const int16x8_t max = vmovq_n_s16((1 << bd) - 1);
  const int16x8_t top_left = vld1q_dup_s16((const int16_t *)(above - 1));
  const int16x4_t above_s16d = vld1_s16((const int16_t *)above);
  const int16x8_t above_s16 = vcombine_s16(above_s16d, above_s16d);
  const int16x4_t left_s16 = vld1_s16((const int16_t *)left);
  const int16x8_t sub = vsubq_s16(above_s16, top_left);
  int16x8_t sum;
  uint16x8_t row;

  sum = vcombine_s16(vdup_lane_s16(left_s16, 0), vdup_lane_s16(left_s16, 1));
  sum = vaddq_s16(sum, sub);
  sum = vminq_s16(sum, max);
  row = vqshluq_n_s16(sum, 0);
  vst1_u16(dst, vget_low_u16(row));
  dst += stride;
  vst1_u16(dst, vget_high_u16(row));
  dst += stride;

  sum = vcombine_s16(vdup_lane_s16(left_s16, 2), vdup_lane_s16(left_s16, 3));
  sum = vaddq_s16(sum, sub);
  sum = vminq_s16(sum, max);
  row = vqshluq_n_s16(sum, 0);
  vst1_u16(dst, vget_low_u16(row));
  dst += stride;
  vst1_u16(dst, vget_high_u16(row));
}

static INLINE void tm_8_kernel(uint16_t **dst, const ptrdiff_t stride,
                               const int16x8_t left_dup, const int16x8_t sub,
                               const int16x8_t max) {
  uint16x8_t row;
  int16x8_t sum = vaddq_s16(left_dup, sub);
  sum = vminq_s16(sum, max);
  row = vqshluq_n_s16(sum, 0);
  vst1q_u16(*dst, row);
  *dst += stride;
}

void vpx_highbd_tm_predictor_8x8_neon(uint16_t *dst, ptrdiff_t stride,
                                      const uint16_t *above,
                                      const uint16_t *left, int bd) {
  const int16x8_t max = vmovq_n_s16((1 << bd) - 1);
  const int16x8_t top_left = vld1q_dup_s16((const int16_t *)(above - 1));
  const int16x8_t above_s16 = vld1q_s16((const int16_t *)above);
  const int16x8_t left_s16 = vld1q_s16((const int16_t *)left);
  const int16x8_t sub = vsubq_s16(above_s16, top_left);
  int16x4_t left_s16d;
  int16x8_t left_dup;
  int i;

  left_s16d = vget_low_s16(left_s16);

  for (i = 0; i < 2; i++, left_s16d = vget_high_s16(left_s16)) {
    left_dup = vdupq_lane_s16(left_s16d, 0);
    tm_8_kernel(&dst, stride, left_dup, sub, max);

    left_dup = vdupq_lane_s16(left_s16d, 1);
    tm_8_kernel(&dst, stride, left_dup, sub, max);

    left_dup = vdupq_lane_s16(left_s16d, 2);
    tm_8_kernel(&dst, stride, left_dup, sub, max);

    left_dup = vdupq_lane_s16(left_s16d, 3);
    tm_8_kernel(&dst, stride, left_dup, sub, max);
  }
}

static INLINE void tm_16_kernel(uint16_t **dst, const ptrdiff_t stride,
                                const int16x8_t left_dup, const int16x8_t sub0,
                                const int16x8_t sub1, const int16x8_t max) {
  uint16x8_t row0, row1;
  int16x8_t sum0 = vaddq_s16(left_dup, sub0);
  int16x8_t sum1 = vaddq_s16(left_dup, sub1);
  sum0 = vminq_s16(sum0, max);
  sum1 = vminq_s16(sum1, max);
  row0 = vqshluq_n_s16(sum0, 0);
  row1 = vqshluq_n_s16(sum1, 0);
  vst1q_u16(*dst, row0);
  *dst += 8;
  vst1q_u16(*dst, row1);
  *dst += stride - 8;
}

void vpx_highbd_tm_predictor_16x16_neon(uint16_t *dst, ptrdiff_t stride,
                                        const uint16_t *above,
                                        const uint16_t *left, int bd) {
  const int16x8_t max = vmovq_n_s16((1 << bd) - 1);
  const int16x8_t top_left = vld1q_dup_s16((const int16_t *)(above - 1));
  const int16x8_t above0 = vld1q_s16((const int16_t *)above);
  const int16x8_t above1 = vld1q_s16((const int16_t *)(above + 8));
  const int16x8_t sub0 = vsubq_s16(above0, top_left);
  const int16x8_t sub1 = vsubq_s16(above1, top_left);
  int16x8_t left_dup;
  int i, j;

  for (j = 0; j < 2; j++, left += 8) {
    const int16x8_t left_s16q = vld1q_s16((const int16_t *)left);
    int16x4_t left_s16d = vget_low_s16(left_s16q);
    for (i = 0; i < 2; i++, left_s16d = vget_high_s16(left_s16q)) {
      left_dup = vdupq_lane_s16(left_s16d, 0);
      tm_16_kernel(&dst, stride, left_dup, sub0, sub1, max);

      left_dup = vdupq_lane_s16(left_s16d, 1);
      tm_16_kernel(&dst, stride, left_dup, sub0, sub1, max);

      left_dup = vdupq_lane_s16(left_s16d, 2);
      tm_16_kernel(&dst, stride, left_dup, sub0, sub1, max);

      left_dup = vdupq_lane_s16(left_s16d, 3);
      tm_16_kernel(&dst, stride, left_dup, sub0, sub1, max);
    }
  }
}

static INLINE void tm_32_kernel(uint16_t **dst, const ptrdiff_t stride,
                                const int16x8_t left_dup, const int16x8_t sub0,
                                const int16x8_t sub1, const int16x8_t sub2,
                                const int16x8_t sub3, const int16x8_t max) {
  uint16x8_t row0, row1, row2, row3;
  int16x8_t sum0 = vaddq_s16(left_dup, sub0);
  int16x8_t sum1 = vaddq_s16(left_dup, sub1);
  int16x8_t sum2 = vaddq_s16(left_dup, sub2);
  int16x8_t sum3 = vaddq_s16(left_dup, sub3);
  sum0 = vminq_s16(sum0, max);
  sum1 = vminq_s16(sum1, max);
  sum2 = vminq_s16(sum2, max);
  sum3 = vminq_s16(sum3, max);
  row0 = vqshluq_n_s16(sum0, 0);
  row1 = vqshluq_n_s16(sum1, 0);
  row2 = vqshluq_n_s16(sum2, 0);
  row3 = vqshluq_n_s16(sum3, 0);
  vst1q_u16(*dst, row0);
  *dst += 8;
  vst1q_u16(*dst, row1);
  *dst += 8;
  vst1q_u16(*dst, row2);
  *dst += 8;
  vst1q_u16(*dst, row3);
  *dst += stride - 24;
}

void vpx_highbd_tm_predictor_32x32_neon(uint16_t *dst, ptrdiff_t stride,
                                        const uint16_t *above,
                                        const uint16_t *left, int bd) {
  const int16x8_t max = vmovq_n_s16((1 << bd) - 1);
  const int16x8_t top_left = vld1q_dup_s16((const int16_t *)(above - 1));
  const int16x8_t above0 = vld1q_s16((const int16_t *)above);
  const int16x8_t above1 = vld1q_s16((const int16_t *)(above + 8));
  const int16x8_t above2 = vld1q_s16((const int16_t *)(above + 16));
  const int16x8_t above3 = vld1q_s16((const int16_t *)(above + 24));
  const int16x8_t sub0 = vsubq_s16(above0, top_left);
  const int16x8_t sub1 = vsubq_s16(above1, top_left);
  const int16x8_t sub2 = vsubq_s16(above2, top_left);
  const int16x8_t sub3 = vsubq_s16(above3, top_left);
  int16x8_t left_dup;
  int i, j;

  for (i = 0; i < 4; i++, left += 8) {
    const int16x8_t left_s16q = vld1q_s16((const int16_t *)left);
    int16x4_t left_s16d = vget_low_s16(left_s16q);
    for (j = 0; j < 2; j++, left_s16d = vget_high_s16(left_s16q)) {
      left_dup = vdupq_lane_s16(left_s16d, 0);
      tm_32_kernel(&dst, stride, left_dup, sub0, sub1, sub2, sub3, max);

      left_dup = vdupq_lane_s16(left_s16d, 1);
      tm_32_kernel(&dst, stride, left_dup, sub0, sub1, sub2, sub3, max);

      left_dup = vdupq_lane_s16(left_s16d, 2);
      tm_32_kernel(&dst, stride, left_dup, sub0, sub1, sub2, sub3, max);

      left_dup = vdupq_lane_s16(left_s16d, 3);
      tm_32_kernel(&dst, stride, left_dup, sub0, sub1, sub2, sub3, max);
    }
  }
}