av1/common/arm/highbd_convolve_scale_neon.c - aom - Git at Google

 /*
  * Copyright (c) 2023, Alliance for Open Media. All rights reserved.
  *
  * This source code is subject to the terms of the BSD 2 Clause License and
  * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
  * was not distributed with this source code in the LICENSE file, you can
  * obtain it at www.aomedia.org/license/software. If the Alliance for Open
  * Media Patent License 1.0 was not distributed with this source code in the
  * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
  */

 #include <assert.h>
 #include <arm_neon.h>

 #include "config/aom_config.h"
 #include "config/av1_rtcd.h"

 #include "aom_dsp/aom_dsp_common.h"
 #include "aom_dsp/arm/mem_neon.h"
 #include "aom_dsp/arm/transpose_neon.h"
 #include "aom_ports/mem.h"
 #include "av1/common/convolve.h"
 #include "av1/common/filter.h"
 #include "av1/common/arm/highbd_convolve_neon.h"

 static inline void highbd_dist_wtd_comp_avg_neon(
     const uint16_t *src_ptr, int src_stride, uint16_t *dst_ptr, int dst_stride,
     int w, int h, ConvolveParams *conv_params, const int round_bits,
     const int offset, const int bd) {
   CONV_BUF_TYPE *ref_ptr = conv_params->dst;
   const int ref_stride = conv_params->dst_stride;
   const int32x4_t round_shift = vdupq_n_s32(-round_bits);
   const uint32x4_t offset_vec = vdupq_n_u32(offset);
   const uint16x8_t max = vdupq_n_u16((1 << bd) - 1);
   uint16x4_t fwd_offset = vdup_n_u16(conv_params->fwd_offset);
   uint16x4_t bck_offset = vdup_n_u16(conv_params->bck_offset);

   // Weighted averaging
   if (w <= 4) {
     do {
       const uint16x4_t src = vld1_u16(src_ptr);
       const uint16x4_t ref = vld1_u16(ref_ptr);

       uint32x4_t wtd_avg = vmull_u16(ref, fwd_offset);
       wtd_avg = vmlal_u16(wtd_avg, src, bck_offset);
       wtd_avg = vshrq_n_u32(wtd_avg, DIST_PRECISION_BITS);
       int32x4_t d0 = vreinterpretq_s32_u32(vsubq_u32(wtd_avg, offset_vec));
       d0 = vqrshlq_s32(d0, round_shift);

       uint16x4_t d0_u16 = vqmovun_s32(d0);
       d0_u16 = vmin_u16(d0_u16, vget_low_u16(max));

       if (w == 2) {
         store_u16_2x1(dst_ptr, d0_u16);
       } else {
         vst1_u16(dst_ptr, d0_u16);
       }

       src_ptr += src_stride;
       dst_ptr += dst_stride;
       ref_ptr += ref_stride;
     } while (--h != 0);
   } else {
     do {
       int width = w;
       const uint16_t *src = src_ptr;
       const uint16_t *ref = ref_ptr;
       uint16_t *dst = dst_ptr;
       do {
         const uint16x8_t s = vld1q_u16(src);
         const uint16x8_t r = vld1q_u16(ref);

         uint32x4_t wtd_avg0 = vmull_u16(vget_low_u16(r), fwd_offset);
         wtd_avg0 = vmlal_u16(wtd_avg0, vget_low_u16(s), bck_offset);
         wtd_avg0 = vshrq_n_u32(wtd_avg0, DIST_PRECISION_BITS);
         int32x4_t d0 = vreinterpretq_s32_u32(vsubq_u32(wtd_avg0, offset_vec));
         d0 = vqrshlq_s32(d0, round_shift);

         uint32x4_t wtd_avg1 = vmull_u16(vget_high_u16(r), fwd_offset);
         wtd_avg1 = vmlal_u16(wtd_avg1, vget_high_u16(s), bck_offset);
         wtd_avg1 = vshrq_n_u32(wtd_avg1, DIST_PRECISION_BITS);
         int32x4_t d1 = vreinterpretq_s32_u32(vsubq_u32(wtd_avg1, offset_vec));
         d1 = vqrshlq_s32(d1, round_shift);

         uint16x8_t d01 = vcombine_u16(vqmovun_s32(d0), vqmovun_s32(d1));
         d01 = vminq_u16(d01, max);
         vst1q_u16(dst, d01);

         src += 8;
         ref += 8;
         dst += 8;
         width -= 8;
       } while (width != 0);
       src_ptr += src_stride;
       dst_ptr += dst_stride;
       ref_ptr += ref_stride;
     } while (--h != 0);
   }
 }

 static inline void highbd_comp_avg_neon(const uint16_t *src_ptr, int src_stride,
                                         uint16_t *dst_ptr, int dst_stride,
                                         int w, int h,
                                         ConvolveParams *conv_params,
                                         const int round_bits, const int offset,
                                         const int bd) {
   CONV_BUF_TYPE *ref_ptr = conv_params->dst;
   const int ref_stride = conv_params->dst_stride;
   const int32x4_t round_shift = vdupq_n_s32(-round_bits);
   const uint16x4_t offset_vec = vdup_n_u16(offset);
   const uint16x8_t max = vdupq_n_u16((1 << bd) - 1);

   if (w <= 4) {
     do {
       const uint16x4_t src = vld1_u16(src_ptr);
       const uint16x4_t ref = vld1_u16(ref_ptr);

       uint16x4_t avg = vhadd_u16(src, ref);
       int32x4_t d0 = vreinterpretq_s32_u32(vsubl_u16(avg, offset_vec));
       d0 = vqrshlq_s32(d0, round_shift);

       uint16x4_t d0_u16 = vqmovun_s32(d0);
       d0_u16 = vmin_u16(d0_u16, vget_low_u16(max));

       if (w == 2) {
         store_u16_2x1(dst_ptr, d0_u16);
       } else {
         vst1_u16(dst_ptr, d0_u16);
       }

       src_ptr += src_stride;
       ref_ptr += ref_stride;
       dst_ptr += dst_stride;
     } while (--h != 0);
   } else {
     do {
       int width = w;
       const uint16_t *src = src_ptr;
       const uint16_t *ref = ref_ptr;
       uint16_t *dst = dst_ptr;
       do {
         const uint16x8_t s = vld1q_u16(src);
         const uint16x8_t r = vld1q_u16(ref);

         uint16x8_t avg = vhaddq_u16(s, r);
         int32x4_t d0_lo =
             vreinterpretq_s32_u32(vsubl_u16(vget_low_u16(avg), offset_vec));
         int32x4_t d0_hi =
             vreinterpretq_s32_u32(vsubl_u16(vget_high_u16(avg), offset_vec));
         d0_lo = vqrshlq_s32(d0_lo, round_shift);
         d0_hi = vqrshlq_s32(d0_hi, round_shift);

         uint16x8_t d0 = vcombine_u16(vqmovun_s32(d0_lo), vqmovun_s32(d0_hi));
         d0 = vminq_u16(d0, max);
         vst1q_u16(dst, d0);

         src += 8;
         ref += 8;
         dst += 8;
         width -= 8;
       } while (width != 0);

       src_ptr += src_stride;
       ref_ptr += ref_stride;
       dst_ptr += dst_stride;
     } while (--h != 0);
   }
 }

 static inline void highbd_convolve_2d_x_scale_8tap_neon(
     const uint16_t *src_ptr, int src_stride, uint16_t *dst_ptr, int dst_stride,
     int w, int h, const int subpel_x_qn, const int x_step_qn,
     const InterpFilterParams *filter_params, ConvolveParams *conv_params,
     const int offset) {
   static const uint32_t kIdx[4] = { 0, 1, 2, 3 };
   const uint32x4_t idx = vld1q_u32(kIdx);
   const uint32x4_t subpel_mask = vdupq_n_u32(SCALE_SUBPEL_MASK);
   const int32x4_t shift_s32 = vdupq_n_s32(-conv_params->round_0);
   const int32x4_t offset_s32 = vdupq_n_s32(offset);

   if (w <= 4) {
     int height = h;
     uint16_t *d = dst_ptr;

     do {
       int x_qn = subpel_x_qn;

       // Load 4 src vectors at a time, they might be the same, but we have to
       // calculate the indices anyway. Doing it in SIMD and then storing the
       // indices is faster than having to calculate the expression
       // &src_ptr[((x_qn + 0*x_step_qn) >> SCALE_SUBPEL_BITS)] 4 times
       // Ideally this should be a gather using the indices, but NEON does not
       // have that, so have to emulate
       const uint32x4_t xqn_idx = vmlaq_n_u32(vdupq_n_u32(x_qn), idx, x_step_qn);
       // We have to multiply x2 to get the actual pointer as sizeof(uint16_t) =
       // 2
       const uint32x4_t src_idx_u32 =
           vshlq_n_u32(vshrq_n_u32(xqn_idx, SCALE_SUBPEL_BITS), 1);
 #if AOM_ARCH_AARCH64
       uint64x2_t src4[2];
       src4[0] = vaddw_u32(vdupq_n_u64((const uint64_t)src_ptr),
                           vget_low_u32(src_idx_u32));
       src4[1] = vaddw_u32(vdupq_n_u64((const uint64_t)src_ptr),
                           vget_high_u32(src_idx_u32));
       int16_t *src4_ptr[4];
       uint64_t *tmp_ptr = (uint64_t *)&src4_ptr;
       vst1q_u64(tmp_ptr, src4[0]);
       vst1q_u64(tmp_ptr + 2, src4[1]);
 #else
       uint32x4_t src4;
       src4 = vaddq_u32(vdupq_n_u32((const uint32_t)src_ptr), src_idx_u32);
       int16_t *src4_ptr[4];
       uint32_t *tmp_ptr = (uint32_t *)&src4_ptr;
       vst1q_u32(tmp_ptr, src4);
 #endif  // AOM_ARCH_AARCH64
       // Same for the filter vectors
       const int32x4_t filter_idx_s32 = vreinterpretq_s32_u32(
           vshrq_n_u32(vandq_u32(xqn_idx, subpel_mask), SCALE_EXTRA_BITS));
       int32_t x_filter4_idx[4];
       vst1q_s32(x_filter4_idx, filter_idx_s32);
       const int16_t *x_filter4_ptr[4];

       // Load source
       int16x8_t s0 = vld1q_s16(src4_ptr[0]);
       int16x8_t s1 = vld1q_s16(src4_ptr[1]);
       int16x8_t s2 = vld1q_s16(src4_ptr[2]);
       int16x8_t s3 = vld1q_s16(src4_ptr[3]);

       // We could easily do this using SIMD as well instead of calling the
       // inline function 4 times.
       x_filter4_ptr[0] =
           av1_get_interp_filter_subpel_kernel(filter_params, x_filter4_idx[0]);
       x_filter4_ptr[1] =
           av1_get_interp_filter_subpel_kernel(filter_params, x_filter4_idx[1]);
       x_filter4_ptr[2] =
           av1_get_interp_filter_subpel_kernel(filter_params, x_filter4_idx[2]);
       x_filter4_ptr[3] =
           av1_get_interp_filter_subpel_kernel(filter_params, x_filter4_idx[3]);

       // Actually load the filters
       const int16x8_t x_filter0 = vld1q_s16(x_filter4_ptr[0]);
       const int16x8_t x_filter1 = vld1q_s16(x_filter4_ptr[1]);
       const int16x8_t x_filter2 = vld1q_s16(x_filter4_ptr[2]);
       const int16x8_t x_filter3 = vld1q_s16(x_filter4_ptr[3]);

       // Group low and high parts and transpose
       int16x4_t filters_lo[] = { vget_low_s16(x_filter0),
                                  vget_low_s16(x_filter1),
                                  vget_low_s16(x_filter2),
                                  vget_low_s16(x_filter3) };
       int16x4_t filters_hi[] = { vget_high_s16(x_filter0),
                                  vget_high_s16(x_filter1),
                                  vget_high_s16(x_filter2),
                                  vget_high_s16(x_filter3) };
       transpose_array_inplace_u16_4x4((uint16x4_t *)filters_lo);
       transpose_array_inplace_u16_4x4((uint16x4_t *)filters_hi);

       // Run the 2D Scale convolution
       uint16x4_t d0 = highbd_convolve8_2d_scale_horiz4x8_s32_s16(
           s0, s1, s2, s3, filters_lo, filters_hi, shift_s32, offset_s32);

       if (w == 2) {
         store_u16_2x1(d, d0);
       } else {
         vst1_u16(d, d0);
       }

       src_ptr += src_stride;
       d += dst_stride;
       height--;
     } while (height > 0);
   } else {
     int height = h;

     do {
       int width = w;
       int x_qn = subpel_x_qn;
       uint16_t *d = dst_ptr;
       const uint16_t *s = src_ptr;

       do {
         // Load 4 src vectors at a time, they might be the same, but we have to
         // calculate the indices anyway. Doing it in SIMD and then storing the
         // indices is faster than having to calculate the expression
         // &src_ptr[((x_qn + 0*x_step_qn) >> SCALE_SUBPEL_BITS)] 4 times
         // Ideally this should be a gather using the indices, but NEON does not
         // have that, so have to emulate
         const uint32x4_t xqn_idx =
             vmlaq_n_u32(vdupq_n_u32(x_qn), idx, x_step_qn);
         // We have to multiply x2 to get the actual pointer as sizeof(uint16_t)
         // = 2
         const uint32x4_t src_idx_u32 =
             vshlq_n_u32(vshrq_n_u32(xqn_idx, SCALE_SUBPEL_BITS), 1);
 #if AOM_ARCH_AARCH64
         uint64x2_t src4[2];
         src4[0] = vaddw_u32(vdupq_n_u64((const uint64_t)s),
                             vget_low_u32(src_idx_u32));
         src4[1] = vaddw_u32(vdupq_n_u64((const uint64_t)s),
                             vget_high_u32(src_idx_u32));
         int16_t *src4_ptr[4];
         uint64_t *tmp_ptr = (uint64_t *)&src4_ptr;
         vst1q_u64(tmp_ptr, src4[0]);
         vst1q_u64(tmp_ptr + 2, src4[1]);
 #else
         uint32x4_t src4;
         src4 = vaddq_u32(vdupq_n_u32((const uint32_t)s), src_idx_u32);
         int16_t *src4_ptr[4];
         uint32_t *tmp_ptr = (uint32_t *)&src4_ptr;
         vst1q_u32(tmp_ptr, src4);
 #endif  // AOM_ARCH_AARCH64
         // Same for the filter vectors
         const int32x4_t filter_idx_s32 = vreinterpretq_s32_u32(
             vshrq_n_u32(vandq_u32(xqn_idx, subpel_mask), SCALE_EXTRA_BITS));
         int32_t x_filter4_idx[4];
         vst1q_s32(x_filter4_idx, filter_idx_s32);
         const int16_t *x_filter4_ptr[4];

         // Load source
         int16x8_t s0 = vld1q_s16(src4_ptr[0]);
         int16x8_t s1 = vld1q_s16(src4_ptr[1]);
         int16x8_t s2 = vld1q_s16(src4_ptr[2]);
         int16x8_t s3 = vld1q_s16(src4_ptr[3]);

         // We could easily do this using SIMD as well instead of calling the
         // inline function 4 times.
         x_filter4_ptr[0] = av1_get_interp_filter_subpel_kernel(
             filter_params, x_filter4_idx[0]);
         x_filter4_ptr[1] = av1_get_interp_filter_subpel_kernel(
             filter_params, x_filter4_idx[1]);
         x_filter4_ptr[2] = av1_get_interp_filter_subpel_kernel(
             filter_params, x_filter4_idx[2]);
         x_filter4_ptr[3] = av1_get_interp_filter_subpel_kernel(
             filter_params, x_filter4_idx[3]);

         // Actually load the filters
         const int16x8_t x_filter0 = vld1q_s16(x_filter4_ptr[0]);
         const int16x8_t x_filter1 = vld1q_s16(x_filter4_ptr[1]);
         const int16x8_t x_filter2 = vld1q_s16(x_filter4_ptr[2]);
         const int16x8_t x_filter3 = vld1q_s16(x_filter4_ptr[3]);

         // Group low and high parts and transpose
         int16x4_t filters_lo[] = { vget_low_s16(x_filter0),
                                    vget_low_s16(x_filter1),
                                    vget_low_s16(x_filter2),
                                    vget_low_s16(x_filter3) };
         int16x4_t filters_hi[] = { vget_high_s16(x_filter0),
                                    vget_high_s16(x_filter1),
                                    vget_high_s16(x_filter2),
                                    vget_high_s16(x_filter3) };
         transpose_array_inplace_u16_4x4((uint16x4_t *)filters_lo);
         transpose_array_inplace_u16_4x4((uint16x4_t *)filters_hi);

         // Run the 2D Scale X convolution
         uint16x4_t d0 = highbd_convolve8_2d_scale_horiz4x8_s32_s16(
             s0, s1, s2, s3, filters_lo, filters_hi, shift_s32, offset_s32);

         vst1_u16(d, d0);

         x_qn += 4 * x_step_qn;
         d += 4;
         width -= 4;
       } while (width > 0);

       src_ptr += src_stride;
       dst_ptr += dst_stride;
       height--;
     } while (height > 0);
   }
 }

 static inline void highbd_convolve_2d_y_scale_8tap_neon(
     const uint16_t *src_ptr, int src_stride, uint16_t *dst_ptr, int dst_stride,
     int w, int h, const int subpel_y_qn, const int y_step_qn,
     const InterpFilterParams *filter_params, const int round1_bits,
     const int offset) {
   const int32x4_t offset_s32 = vdupq_n_s32(1 << offset);

   const int32x4_t round1_shift_s32 = vdupq_n_s32(-round1_bits);
   if (w <= 4) {
     int height = h;
     uint16_t *d = dst_ptr;
     int y_qn = subpel_y_qn;

     do {
       const int16_t *s =
           (const int16_t *)&src_ptr[(y_qn >> SCALE_SUBPEL_BITS) * src_stride];

       int16x4_t s0, s1, s2, s3, s4, s5, s6, s7;
       load_s16_4x8(s, src_stride, &s0, &s1, &s2, &s3, &s4, &s5, &s6, &s7);

       const int y_filter_idx = (y_qn & SCALE_SUBPEL_MASK) >> SCALE_EXTRA_BITS;
       const int16_t *y_filter_ptr =
           av1_get_interp_filter_subpel_kernel(filter_params, y_filter_idx);
       const int16x8_t y_filter = vld1q_s16(y_filter_ptr);

       uint16x4_t d0 = highbd_convolve8_4_srsub_s32_s16(
           s0, s1, s2, s3, s4, s5, s6, s7, y_filter, round1_shift_s32,
           offset_s32, vdupq_n_s32(0));

       if (w == 2) {
         store_u16_2x1(d, d0);
       } else {
         vst1_u16(d, d0);
       }

       y_qn += y_step_qn;
       d += dst_stride;
       height--;
     } while (height > 0);
   } else {
     int width = w;

     do {
       int height = h;
       int y_qn = subpel_y_qn;

       uint16_t *d = dst_ptr;

       do {
         const int16_t *s =
             (const int16_t *)&src_ptr[(y_qn >> SCALE_SUBPEL_BITS) * src_stride];
         int16x8_t s0, s1, s2, s3, s4, s5, s6, s7;
         load_s16_8x8(s, src_stride, &s0, &s1, &s2, &s3, &s4, &s5, &s6, &s7);

         const int y_filter_idx = (y_qn & SCALE_SUBPEL_MASK) >> SCALE_EXTRA_BITS;
         const int16_t *y_filter_ptr =
             av1_get_interp_filter_subpel_kernel(filter_params, y_filter_idx);
         const int16x8_t y_filter = vld1q_s16(y_filter_ptr);

         uint16x8_t d0 = highbd_convolve8_8_srsub_s32_s16(
             s0, s1, s2, s3, s4, s5, s6, s7, y_filter, round1_shift_s32,
             offset_s32, vdupq_n_s32(0));
         vst1q_u16(d, d0);

         y_qn += y_step_qn;
         d += dst_stride;
         height--;
       } while (height > 0);
       src_ptr += 8;
       dst_ptr += 8;
       width -= 8;
     } while (width > 0);
   }
 }

 static inline void highbd_convolve_correct_offset_neon(
     const uint16_t *src_ptr, int src_stride, uint16_t *dst_ptr, int dst_stride,
     int w, int h, const int round_bits, const int offset, const int bd) {
   const int32x4_t round_shift_s32 = vdupq_n_s32(-round_bits);
   const int16x4_t offset_s16 = vdup_n_s16(offset);
   const uint16x8_t max = vdupq_n_u16((1 << bd) - 1);

   if (w <= 4) {
     for (int y = 0; y < h; ++y) {
       const int16x4_t s = vld1_s16((const int16_t *)src_ptr + y * src_stride);
       const int32x4_t d0 =
           vqrshlq_s32(vsubl_s16(s, offset_s16), round_shift_s32);
       uint16x4_t d = vqmovun_s32(d0);
       d = vmin_u16(d, vget_low_u16(max));
       if (w == 2) {
         store_u16_2x1(dst_ptr + y * dst_stride, d);
       } else {
         vst1_u16(dst_ptr + y * dst_stride, d);
       }
     }
   } else {
     for (int y = 0; y < h; ++y) {
       for (int x = 0; x < w; x += 8) {
         // Subtract round offset and convolve round
         const int16x8_t s =
             vld1q_s16((const int16_t *)src_ptr + y * src_stride + x);
         const int32x4_t d0 = vqrshlq_s32(vsubl_s16(vget_low_s16(s), offset_s16),
                                          round_shift_s32);
         const int32x4_t d1 = vqrshlq_s32(
             vsubl_s16(vget_high_s16(s), offset_s16), round_shift_s32);
         uint16x8_t d01 = vcombine_u16(vqmovun_s32(d0), vqmovun_s32(d1));
         d01 = vminq_u16(d01, max);
         vst1q_u16(dst_ptr + y * dst_stride + x, d01);
       }
     }
   }
 }

 void av1_highbd_convolve_2d_scale_neon(
     const uint16_t *src, int src_stride, uint16_t *dst, int dst_stride, int w,
     int h, const InterpFilterParams *filter_params_x,
     const InterpFilterParams *filter_params_y, const int subpel_x_qn,
     const int x_step_qn, const int subpel_y_qn, const int y_step_qn,
     ConvolveParams *conv_params, int bd) {
   uint16_t *im_block = (uint16_t *)aom_memalign(
       16, 2 * sizeof(uint16_t) * MAX_SB_SIZE * (MAX_SB_SIZE + MAX_FILTER_TAP));
   if (!im_block) return;
   uint16_t *im_block2 = (uint16_t *)aom_memalign(
       16, 2 * sizeof(uint16_t) * MAX_SB_SIZE * (MAX_SB_SIZE + MAX_FILTER_TAP));
   if (!im_block2) {
     aom_free(im_block);  // free the first block and return.
     return;
   }

   int im_h = (((h - 1) * y_step_qn + subpel_y_qn) >> SCALE_SUBPEL_BITS) +
              filter_params_y->taps;
   const int im_stride = MAX_SB_SIZE;
   const int bits =
       FILTER_BITS * 2 - conv_params->round_0 - conv_params->round_1;
   assert(bits >= 0);

   const int vert_offset = filter_params_y->taps / 2 - 1;
   const int horiz_offset = filter_params_x->taps / 2 - 1;
   const int x_offset_bits = (1 << (bd + FILTER_BITS - 1));
   const int y_offset_bits = bd + 2 * FILTER_BITS - conv_params->round_0;
   const int y_offset_correction =
       ((1 << (y_offset_bits - conv_params->round_1)) +
        (1 << (y_offset_bits - conv_params->round_1 - 1)));

   CONV_BUF_TYPE *dst16 = conv_params->dst;
   const int dst16_stride = conv_params->dst_stride;

   const uint16_t *src_ptr = src - vert_offset * src_stride - horiz_offset;

   highbd_convolve_2d_x_scale_8tap_neon(
       src_ptr, src_stride, im_block, im_stride, w, im_h, subpel_x_qn, x_step_qn,
       filter_params_x, conv_params, x_offset_bits);
   if (conv_params->is_compound && !conv_params->do_average) {
     highbd_convolve_2d_y_scale_8tap_neon(
         im_block, im_stride, dst16, dst16_stride, w, h, subpel_y_qn, y_step_qn,
         filter_params_y, conv_params->round_1, y_offset_bits);
   } else {
     highbd_convolve_2d_y_scale_8tap_neon(
         im_block, im_stride, im_block2, im_stride, w, h, subpel_y_qn, y_step_qn,
         filter_params_y, conv_params->round_1, y_offset_bits);
   }

   // Do the compound averaging outside the loop, avoids branching within the
   // main loop
   if (conv_params->is_compound) {
     if (conv_params->do_average) {
       if (conv_params->use_dist_wtd_comp_avg) {
         highbd_dist_wtd_comp_avg_neon(im_block2, im_stride, dst, dst_stride, w,
                                       h, conv_params, bits, y_offset_correction,
                                       bd);
       } else {
         highbd_comp_avg_neon(im_block2, im_stride, dst, dst_stride, w, h,
                              conv_params, bits, y_offset_correction, bd);
       }
     }
   } else {
     highbd_convolve_correct_offset_neon(im_block2, im_stride, dst, dst_stride,
                                         w, h, bits, y_offset_correction, bd);
   }
   aom_free(im_block);
   aom_free(im_block2);
 }
	/*
	* Copyright (c) 2023, Alliance for Open Media. All rights reserved.
	*
	* This source code is subject to the terms of the BSD 2 Clause License and
	* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
	* was not distributed with this source code in the LICENSE file, you can
	* obtain it at www.aomedia.org/license/software. If the Alliance for Open
	* Media Patent License 1.0 was not distributed with this source code in the
	* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
	*/

	#include <assert.h>
	#include <arm_neon.h>

	#include "config/aom_config.h"
	#include "config/av1_rtcd.h"

	#include "aom_dsp/aom_dsp_common.h"
	#include "aom_dsp/arm/mem_neon.h"
	#include "aom_dsp/arm/transpose_neon.h"
	#include "aom_ports/mem.h"
	#include "av1/common/convolve.h"
	#include "av1/common/filter.h"
	#include "av1/common/arm/highbd_convolve_neon.h"

	static inline void highbd_dist_wtd_comp_avg_neon(
	const uint16_t src_ptr, int src_stride, uint16_t dst_ptr, int dst_stride,
	int w, int h, ConvolveParams *conv_params, const int round_bits,
	const int offset, const int bd) {
	CONV_BUF_TYPE *ref_ptr = conv_params->dst;
	const int ref_stride = conv_params->dst_stride;
	const int32x4_t round_shift = vdupq_n_s32(-round_bits);
	const uint32x4_t offset_vec = vdupq_n_u32(offset);
	const uint16x8_t max = vdupq_n_u16((1 << bd) - 1);
	uint16x4_t fwd_offset = vdup_n_u16(conv_params->fwd_offset);
	uint16x4_t bck_offset = vdup_n_u16(conv_params->bck_offset);

	// Weighted averaging
	if (w <= 4) {
	do {
	const uint16x4_t src = vld1_u16(src_ptr);
	const uint16x4_t ref = vld1_u16(ref_ptr);

	uint32x4_t wtd_avg = vmull_u16(ref, fwd_offset);
	wtd_avg = vmlal_u16(wtd_avg, src, bck_offset);
	wtd_avg = vshrq_n_u32(wtd_avg, DIST_PRECISION_BITS);
	int32x4_t d0 = vreinterpretq_s32_u32(vsubq_u32(wtd_avg, offset_vec));
	d0 = vqrshlq_s32(d0, round_shift);

	uint16x4_t d0_u16 = vqmovun_s32(d0);
	d0_u16 = vmin_u16(d0_u16, vget_low_u16(max));

	if (w == 2) {
	store_u16_2x1(dst_ptr, d0_u16);
	} else {
	vst1_u16(dst_ptr, d0_u16);
	}

	src_ptr += src_stride;
	dst_ptr += dst_stride;
	ref_ptr += ref_stride;
	} while (--h != 0);
	} else {
	do {
	int width = w;
	const uint16_t *src = src_ptr;
	const uint16_t *ref = ref_ptr;
	uint16_t *dst = dst_ptr;
	do {
	const uint16x8_t s = vld1q_u16(src);
	const uint16x8_t r = vld1q_u16(ref);

	uint32x4_t wtd_avg0 = vmull_u16(vget_low_u16(r), fwd_offset);
	wtd_avg0 = vmlal_u16(wtd_avg0, vget_low_u16(s), bck_offset);
	wtd_avg0 = vshrq_n_u32(wtd_avg0, DIST_PRECISION_BITS);
	int32x4_t d0 = vreinterpretq_s32_u32(vsubq_u32(wtd_avg0, offset_vec));
	d0 = vqrshlq_s32(d0, round_shift);

	uint32x4_t wtd_avg1 = vmull_u16(vget_high_u16(r), fwd_offset);
	wtd_avg1 = vmlal_u16(wtd_avg1, vget_high_u16(s), bck_offset);
	wtd_avg1 = vshrq_n_u32(wtd_avg1, DIST_PRECISION_BITS);
	int32x4_t d1 = vreinterpretq_s32_u32(vsubq_u32(wtd_avg1, offset_vec));
	d1 = vqrshlq_s32(d1, round_shift);

	uint16x8_t d01 = vcombine_u16(vqmovun_s32(d0), vqmovun_s32(d1));
	d01 = vminq_u16(d01, max);
	vst1q_u16(dst, d01);

	src += 8;
	ref += 8;
	dst += 8;
	width -= 8;
	} while (width != 0);
	src_ptr += src_stride;
	dst_ptr += dst_stride;
	ref_ptr += ref_stride;
	} while (--h != 0);
	}
	}

	static inline void highbd_comp_avg_neon(const uint16_t *src_ptr, int src_stride,
	uint16_t *dst_ptr, int dst_stride,
	int w, int h,
	ConvolveParams *conv_params,
	const int round_bits, const int offset,
	const int bd) {
	CONV_BUF_TYPE *ref_ptr = conv_params->dst;
	const int ref_stride = conv_params->dst_stride;
	const int32x4_t round_shift = vdupq_n_s32(-round_bits);
	const uint16x4_t offset_vec = vdup_n_u16(offset);
	const uint16x8_t max = vdupq_n_u16((1 << bd) - 1);

	if (w <= 4) {
	do {
	const uint16x4_t src = vld1_u16(src_ptr);
	const uint16x4_t ref = vld1_u16(ref_ptr);

	uint16x4_t avg = vhadd_u16(src, ref);
	int32x4_t d0 = vreinterpretq_s32_u32(vsubl_u16(avg, offset_vec));
	d0 = vqrshlq_s32(d0, round_shift);

	uint16x4_t d0_u16 = vqmovun_s32(d0);
	d0_u16 = vmin_u16(d0_u16, vget_low_u16(max));

	if (w == 2) {
	store_u16_2x1(dst_ptr, d0_u16);
	} else {
	vst1_u16(dst_ptr, d0_u16);
	}

	src_ptr += src_stride;
	ref_ptr += ref_stride;
	dst_ptr += dst_stride;
	} while (--h != 0);
	} else {
	do {
	int width = w;
	const uint16_t *src = src_ptr;
	const uint16_t *ref = ref_ptr;
	uint16_t *dst = dst_ptr;
	do {
	const uint16x8_t s = vld1q_u16(src);
	const uint16x8_t r = vld1q_u16(ref);

	uint16x8_t avg = vhaddq_u16(s, r);
	int32x4_t d0_lo =
	vreinterpretq_s32_u32(vsubl_u16(vget_low_u16(avg), offset_vec));
	int32x4_t d0_hi =
	vreinterpretq_s32_u32(vsubl_u16(vget_high_u16(avg), offset_vec));
	d0_lo = vqrshlq_s32(d0_lo, round_shift);
	d0_hi = vqrshlq_s32(d0_hi, round_shift);

	uint16x8_t d0 = vcombine_u16(vqmovun_s32(d0_lo), vqmovun_s32(d0_hi));
	d0 = vminq_u16(d0, max);
	vst1q_u16(dst, d0);

	src += 8;
	ref += 8;
	dst += 8;
	width -= 8;
	} while (width != 0);

	src_ptr += src_stride;
	ref_ptr += ref_stride;
	dst_ptr += dst_stride;
	} while (--h != 0);
	}
	}

	static inline void highbd_convolve_2d_x_scale_8tap_neon(
	const uint16_t src_ptr, int src_stride, uint16_t dst_ptr, int dst_stride,
	int w, int h, const int subpel_x_qn, const int x_step_qn,
	const InterpFilterParams filter_params, ConvolveParams conv_params,
	const int offset) {
	static const uint32_t kIdx[4] = { 0, 1, 2, 3 };
	const uint32x4_t idx = vld1q_u32(kIdx);
	const uint32x4_t subpel_mask = vdupq_n_u32(SCALE_SUBPEL_MASK);
	const int32x4_t shift_s32 = vdupq_n_s32(-conv_params->round_0);
	const int32x4_t offset_s32 = vdupq_n_s32(offset);

	if (w <= 4) {
	int height = h;
	uint16_t *d = dst_ptr;

	do {
	int x_qn = subpel_x_qn;

	// Load 4 src vectors at a time, they might be the same, but we have to
	// calculate the indices anyway. Doing it in SIMD and then storing the
	// indices is faster than having to calculate the expression
	// &src_ptr[((x_qn + 0*x_step_qn) >> SCALE_SUBPEL_BITS)] 4 times
	// Ideally this should be a gather using the indices, but NEON does not
	// have that, so have to emulate
	const uint32x4_t xqn_idx = vmlaq_n_u32(vdupq_n_u32(x_qn), idx, x_step_qn);
	// We have to multiply x2 to get the actual pointer as sizeof(uint16_t) =
	// 2
	const uint32x4_t src_idx_u32 =
	vshlq_n_u32(vshrq_n_u32(xqn_idx, SCALE_SUBPEL_BITS), 1);
	#if AOM_ARCH_AARCH64
	uint64x2_t src4[2];
	src4[0] = vaddw_u32(vdupq_n_u64((const uint64_t)src_ptr),
	vget_low_u32(src_idx_u32));
	src4[1] = vaddw_u32(vdupq_n_u64((const uint64_t)src_ptr),
	vget_high_u32(src_idx_u32));
	int16_t *src4_ptr[4];
	uint64_t tmp_ptr = (uint64_t )&src4_ptr;
	vst1q_u64(tmp_ptr, src4[0]);
	vst1q_u64(tmp_ptr + 2, src4[1]);
	#else
	uint32x4_t src4;
	src4 = vaddq_u32(vdupq_n_u32((const uint32_t)src_ptr), src_idx_u32);
	int16_t *src4_ptr[4];
	uint32_t tmp_ptr = (uint32_t )&src4_ptr;
	vst1q_u32(tmp_ptr, src4);
	#endif // AOM_ARCH_AARCH64
	// Same for the filter vectors
	const int32x4_t filter_idx_s32 = vreinterpretq_s32_u32(
	vshrq_n_u32(vandq_u32(xqn_idx, subpel_mask), SCALE_EXTRA_BITS));
	int32_t x_filter4_idx[4];
	vst1q_s32(x_filter4_idx, filter_idx_s32);
	const int16_t *x_filter4_ptr[4];

	// Load source
	int16x8_t s0 = vld1q_s16(src4_ptr[0]);
	int16x8_t s1 = vld1q_s16(src4_ptr[1]);
	int16x8_t s2 = vld1q_s16(src4_ptr[2]);
	int16x8_t s3 = vld1q_s16(src4_ptr[3]);

	// We could easily do this using SIMD as well instead of calling the
	// inline function 4 times.
	x_filter4_ptr[0] =
	av1_get_interp_filter_subpel_kernel(filter_params, x_filter4_idx[0]);
	x_filter4_ptr[1] =
	av1_get_interp_filter_subpel_kernel(filter_params, x_filter4_idx[1]);
	x_filter4_ptr[2] =
	av1_get_interp_filter_subpel_kernel(filter_params, x_filter4_idx[2]);
	x_filter4_ptr[3] =
	av1_get_interp_filter_subpel_kernel(filter_params, x_filter4_idx[3]);

	// Actually load the filters
	const int16x8_t x_filter0 = vld1q_s16(x_filter4_ptr[0]);
	const int16x8_t x_filter1 = vld1q_s16(x_filter4_ptr[1]);
	const int16x8_t x_filter2 = vld1q_s16(x_filter4_ptr[2]);
	const int16x8_t x_filter3 = vld1q_s16(x_filter4_ptr[3]);

	// Group low and high parts and transpose
	int16x4_t filters_lo[] = { vget_low_s16(x_filter0),
	vget_low_s16(x_filter1),
	vget_low_s16(x_filter2),
	vget_low_s16(x_filter3) };
	int16x4_t filters_hi[] = { vget_high_s16(x_filter0),
	vget_high_s16(x_filter1),
	vget_high_s16(x_filter2),
	vget_high_s16(x_filter3) };
	transpose_array_inplace_u16_4x4((uint16x4_t *)filters_lo);
	transpose_array_inplace_u16_4x4((uint16x4_t *)filters_hi);

	// Run the 2D Scale convolution
	uint16x4_t d0 = highbd_convolve8_2d_scale_horiz4x8_s32_s16(
	s0, s1, s2, s3, filters_lo, filters_hi, shift_s32, offset_s32);

	if (w == 2) {
	store_u16_2x1(d, d0);
	} else {
	vst1_u16(d, d0);
	}

	src_ptr += src_stride;
	d += dst_stride;
	height--;
	} while (height > 0);
	} else {
	int height = h;

	do {
	int width = w;
	int x_qn = subpel_x_qn;
	uint16_t *d = dst_ptr;
	const uint16_t *s = src_ptr;

	do {
	// Load 4 src vectors at a time, they might be the same, but we have to
	// calculate the indices anyway. Doing it in SIMD and then storing the
	// indices is faster than having to calculate the expression
	// &src_ptr[((x_qn + 0*x_step_qn) >> SCALE_SUBPEL_BITS)] 4 times
	// Ideally this should be a gather using the indices, but NEON does not
	// have that, so have to emulate
	const uint32x4_t xqn_idx =
	vmlaq_n_u32(vdupq_n_u32(x_qn), idx, x_step_qn);
	// We have to multiply x2 to get the actual pointer as sizeof(uint16_t)
	// = 2
	const uint32x4_t src_idx_u32 =
	vshlq_n_u32(vshrq_n_u32(xqn_idx, SCALE_SUBPEL_BITS), 1);
	#if AOM_ARCH_AARCH64
	uint64x2_t src4[2];
	src4[0] = vaddw_u32(vdupq_n_u64((const uint64_t)s),
	vget_low_u32(src_idx_u32));
	src4[1] = vaddw_u32(vdupq_n_u64((const uint64_t)s),
	vget_high_u32(src_idx_u32));
	int16_t *src4_ptr[4];
	uint64_t tmp_ptr = (uint64_t )&src4_ptr;
	vst1q_u64(tmp_ptr, src4[0]);
	vst1q_u64(tmp_ptr + 2, src4[1]);
	#else
	uint32x4_t src4;
	src4 = vaddq_u32(vdupq_n_u32((const uint32_t)s), src_idx_u32);
	int16_t *src4_ptr[4];
	uint32_t tmp_ptr = (uint32_t )&src4_ptr;
	vst1q_u32(tmp_ptr, src4);
	#endif // AOM_ARCH_AARCH64
	// Same for the filter vectors
	const int32x4_t filter_idx_s32 = vreinterpretq_s32_u32(
	vshrq_n_u32(vandq_u32(xqn_idx, subpel_mask), SCALE_EXTRA_BITS));
	int32_t x_filter4_idx[4];
	vst1q_s32(x_filter4_idx, filter_idx_s32);
	const int16_t *x_filter4_ptr[4];

	// Load source
	int16x8_t s0 = vld1q_s16(src4_ptr[0]);
	int16x8_t s1 = vld1q_s16(src4_ptr[1]);
	int16x8_t s2 = vld1q_s16(src4_ptr[2]);
	int16x8_t s3 = vld1q_s16(src4_ptr[3]);

	// We could easily do this using SIMD as well instead of calling the
	// inline function 4 times.
	x_filter4_ptr[0] = av1_get_interp_filter_subpel_kernel(
	filter_params, x_filter4_idx[0]);
	x_filter4_ptr[1] = av1_get_interp_filter_subpel_kernel(
	filter_params, x_filter4_idx[1]);
	x_filter4_ptr[2] = av1_get_interp_filter_subpel_kernel(
	filter_params, x_filter4_idx[2]);
	x_filter4_ptr[3] = av1_get_interp_filter_subpel_kernel(
	filter_params, x_filter4_idx[3]);

	// Actually load the filters
	const int16x8_t x_filter0 = vld1q_s16(x_filter4_ptr[0]);
	const int16x8_t x_filter1 = vld1q_s16(x_filter4_ptr[1]);
	const int16x8_t x_filter2 = vld1q_s16(x_filter4_ptr[2]);
	const int16x8_t x_filter3 = vld1q_s16(x_filter4_ptr[3]);

	// Group low and high parts and transpose
	int16x4_t filters_lo[] = { vget_low_s16(x_filter0),
	vget_low_s16(x_filter1),
	vget_low_s16(x_filter2),
	vget_low_s16(x_filter3) };
	int16x4_t filters_hi[] = { vget_high_s16(x_filter0),
	vget_high_s16(x_filter1),
	vget_high_s16(x_filter2),
	vget_high_s16(x_filter3) };
	transpose_array_inplace_u16_4x4((uint16x4_t *)filters_lo);
	transpose_array_inplace_u16_4x4((uint16x4_t *)filters_hi);

	// Run the 2D Scale X convolution
	uint16x4_t d0 = highbd_convolve8_2d_scale_horiz4x8_s32_s16(
	s0, s1, s2, s3, filters_lo, filters_hi, shift_s32, offset_s32);

	vst1_u16(d, d0);

	x_qn += 4 * x_step_qn;
	d += 4;
	width -= 4;
	} while (width > 0);

	src_ptr += src_stride;
	dst_ptr += dst_stride;
	height--;
	} while (height > 0);
	}
	}

	static inline void highbd_convolve_2d_y_scale_8tap_neon(
	const uint16_t src_ptr, int src_stride, uint16_t dst_ptr, int dst_stride,
	int w, int h, const int subpel_y_qn, const int y_step_qn,
	const InterpFilterParams *filter_params, const int round1_bits,
	const int offset) {
	const int32x4_t offset_s32 = vdupq_n_s32(1 << offset);

	const int32x4_t round1_shift_s32 = vdupq_n_s32(-round1_bits);
	if (w <= 4) {
	int height = h;
	uint16_t *d = dst_ptr;
	int y_qn = subpel_y_qn;

	do {
	const int16_t *s =
	(const int16_t )&src_ptr[(y_qn >> SCALE_SUBPEL_BITS) src_stride];

	int16x4_t s0, s1, s2, s3, s4, s5, s6, s7;
	load_s16_4x8(s, src_stride, &s0, &s1, &s2, &s3, &s4, &s5, &s6, &s7);

	const int y_filter_idx = (y_qn & SCALE_SUBPEL_MASK) >> SCALE_EXTRA_BITS;
	const int16_t *y_filter_ptr =
	av1_get_interp_filter_subpel_kernel(filter_params, y_filter_idx);
	const int16x8_t y_filter = vld1q_s16(y_filter_ptr);

	uint16x4_t d0 = highbd_convolve8_4_srsub_s32_s16(
	s0, s1, s2, s3, s4, s5, s6, s7, y_filter, round1_shift_s32,
	offset_s32, vdupq_n_s32(0));

	if (w == 2) {
	store_u16_2x1(d, d0);
	} else {
	vst1_u16(d, d0);
	}

	y_qn += y_step_qn;
	d += dst_stride;
	height--;
	} while (height > 0);
	} else {
	int width = w;

	do {
	int height = h;
	int y_qn = subpel_y_qn;

	uint16_t *d = dst_ptr;

	do {
	const int16_t *s =
	(const int16_t )&src_ptr[(y_qn >> SCALE_SUBPEL_BITS) src_stride];
	int16x8_t s0, s1, s2, s3, s4, s5, s6, s7;
	load_s16_8x8(s, src_stride, &s0, &s1, &s2, &s3, &s4, &s5, &s6, &s7);

	const int y_filter_idx = (y_qn & SCALE_SUBPEL_MASK) >> SCALE_EXTRA_BITS;
	const int16_t *y_filter_ptr =
	av1_get_interp_filter_subpel_kernel(filter_params, y_filter_idx);
	const int16x8_t y_filter = vld1q_s16(y_filter_ptr);

	uint16x8_t d0 = highbd_convolve8_8_srsub_s32_s16(
	s0, s1, s2, s3, s4, s5, s6, s7, y_filter, round1_shift_s32,
	offset_s32, vdupq_n_s32(0));
	vst1q_u16(d, d0);

	y_qn += y_step_qn;
	d += dst_stride;
	height--;
	} while (height > 0);
	src_ptr += 8;
	dst_ptr += 8;
	width -= 8;
	} while (width > 0);
	}
	}

	static inline void highbd_convolve_correct_offset_neon(
	const uint16_t src_ptr, int src_stride, uint16_t dst_ptr, int dst_stride,
	int w, int h, const int round_bits, const int offset, const int bd) {
	const int32x4_t round_shift_s32 = vdupq_n_s32(-round_bits);
	const int16x4_t offset_s16 = vdup_n_s16(offset);
	const uint16x8_t max = vdupq_n_u16((1 << bd) - 1);

	if (w <= 4) {
	for (int y = 0; y < h; ++y) {
	const int16x4_t s = vld1_s16((const int16_t )src_ptr + y src_stride);
	const int32x4_t d0 =
	vqrshlq_s32(vsubl_s16(s, offset_s16), round_shift_s32);
	uint16x4_t d = vqmovun_s32(d0);
	d = vmin_u16(d, vget_low_u16(max));
	if (w == 2) {
	store_u16_2x1(dst_ptr + y * dst_stride, d);
	} else {
	vst1_u16(dst_ptr + y * dst_stride, d);
	}
	}
	} else {
	for (int y = 0; y < h; ++y) {
	for (int x = 0; x < w; x += 8) {
	// Subtract round offset and convolve round
	const int16x8_t s =
	vld1q_s16((const int16_t )src_ptr + y src_stride + x);
	const int32x4_t d0 = vqrshlq_s32(vsubl_s16(vget_low_s16(s), offset_s16),
	round_shift_s32);
	const int32x4_t d1 = vqrshlq_s32(
	vsubl_s16(vget_high_s16(s), offset_s16), round_shift_s32);
	uint16x8_t d01 = vcombine_u16(vqmovun_s32(d0), vqmovun_s32(d1));
	d01 = vminq_u16(d01, max);
	vst1q_u16(dst_ptr + y * dst_stride + x, d01);
	}
	}
	}
	}

	void av1_highbd_convolve_2d_scale_neon(
	const uint16_t src, int src_stride, uint16_t dst, int dst_stride, int w,
	int h, const InterpFilterParams *filter_params_x,
	const InterpFilterParams *filter_params_y, const int subpel_x_qn,
	const int x_step_qn, const int subpel_y_qn, const int y_step_qn,
	ConvolveParams *conv_params, int bd) {
	uint16_t im_block = (uint16_t )aom_memalign(
	16, 2 * sizeof(uint16_t) * MAX_SB_SIZE * (MAX_SB_SIZE + MAX_FILTER_TAP));
	if (!im_block) return;
	uint16_t im_block2 = (uint16_t )aom_memalign(
	16, 2 * sizeof(uint16_t) * MAX_SB_SIZE * (MAX_SB_SIZE + MAX_FILTER_TAP));
	if (!im_block2) {
	aom_free(im_block); // free the first block and return.
	return;
	}

	int im_h = (((h - 1) * y_step_qn + subpel_y_qn) >> SCALE_SUBPEL_BITS) +
	filter_params_y->taps;
	const int im_stride = MAX_SB_SIZE;
	const int bits =
	FILTER_BITS * 2 - conv_params->round_0 - conv_params->round_1;
	assert(bits >= 0);

	const int vert_offset = filter_params_y->taps / 2 - 1;
	const int horiz_offset = filter_params_x->taps / 2 - 1;
	const int x_offset_bits = (1 << (bd + FILTER_BITS - 1));
	const int y_offset_bits = bd + 2 * FILTER_BITS - conv_params->round_0;
	const int y_offset_correction =
	((1 << (y_offset_bits - conv_params->round_1)) +
	(1 << (y_offset_bits - conv_params->round_1 - 1)));

	CONV_BUF_TYPE *dst16 = conv_params->dst;
	const int dst16_stride = conv_params->dst_stride;

	const uint16_t src_ptr = src - vert_offset src_stride - horiz_offset;

	highbd_convolve_2d_x_scale_8tap_neon(
	src_ptr, src_stride, im_block, im_stride, w, im_h, subpel_x_qn, x_step_qn,
	filter_params_x, conv_params, x_offset_bits);
	if (conv_params->is_compound && !conv_params->do_average) {
	highbd_convolve_2d_y_scale_8tap_neon(
	im_block, im_stride, dst16, dst16_stride, w, h, subpel_y_qn, y_step_qn,
	filter_params_y, conv_params->round_1, y_offset_bits);
	} else {
	highbd_convolve_2d_y_scale_8tap_neon(
	im_block, im_stride, im_block2, im_stride, w, h, subpel_y_qn, y_step_qn,
	filter_params_y, conv_params->round_1, y_offset_bits);
	}

	// Do the compound averaging outside the loop, avoids branching within the
	// main loop
	if (conv_params->is_compound) {
	if (conv_params->do_average) {
	if (conv_params->use_dist_wtd_comp_avg) {
	highbd_dist_wtd_comp_avg_neon(im_block2, im_stride, dst, dst_stride, w,
	h, conv_params, bits, y_offset_correction,
	bd);
	} else {
	highbd_comp_avg_neon(im_block2, im_stride, dst, dst_stride, w, h,
	conv_params, bits, y_offset_correction, bd);
	}
	}
	} else {
	highbd_convolve_correct_offset_neon(im_block2, im_stride, dst, dst_stride,
	w, h, bits, y_offset_correction, bd);
	}
	aom_free(im_block);
	aom_free(im_block2);
	}