/*
 *  Copyright (c) 2023, Alliance for Open Media. 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.
 */

#ifndef AOM_AV1_COMMON_ARM_HIGHBD_CONVOLVE_NEON_H_
#define AOM_AV1_COMMON_ARM_HIGHBD_CONVOLVE_NEON_H_

#include <arm_neon.h>

static INLINE int32x4_t highbd_convolve8_4_s32(
    const int16x4_t s0, const int16x4_t s1, const int16x4_t s2,
    const int16x4_t s3, const int16x4_t s4, const int16x4_t s5,
    const int16x4_t s6, const int16x4_t s7, const int16x8_t y_filter) {
  const int16x4_t y_filter_lo = vget_low_s16(y_filter);
  const int16x4_t y_filter_hi = vget_high_s16(y_filter);

  int32x4_t sum = vmull_lane_s16(s0, y_filter_lo, 0);
  sum = vmlal_lane_s16(sum, s1, y_filter_lo, 1);
  sum = vmlal_lane_s16(sum, s2, y_filter_lo, 2);
  sum = vmlal_lane_s16(sum, s3, y_filter_lo, 3);
  sum = vmlal_lane_s16(sum, s4, y_filter_hi, 0);
  sum = vmlal_lane_s16(sum, s5, y_filter_hi, 1);
  sum = vmlal_lane_s16(sum, s6, y_filter_hi, 2);
  sum = vmlal_lane_s16(sum, s7, y_filter_hi, 3);

  return sum;
}

static INLINE uint16x4_t highbd_convolve8_4_s32_s16(
    const int16x4_t s0, const int16x4_t s1, const int16x4_t s2,
    const int16x4_t s3, const int16x4_t s4, const int16x4_t s5,
    const int16x4_t s6, const int16x4_t s7, const int16x8_t y_filter) {
  int32x4_t sum =
      highbd_convolve8_4_s32(s0, s1, s2, s3, s4, s5, s6, s7, y_filter);

  return vqrshrun_n_s32(sum, COMPOUND_ROUND1_BITS);
}

static INLINE void highbd_convolve8_8_s32(
    const int16x8_t s0, const int16x8_t s1, const int16x8_t s2,
    const int16x8_t s3, const int16x8_t s4, const int16x8_t s5,
    const int16x8_t s6, const int16x8_t s7, const int16x8_t y_filter,
    int32x4_t *sum0, int32x4_t *sum1) {
  const int16x4_t y_filter_lo = vget_low_s16(y_filter);
  const int16x4_t y_filter_hi = vget_high_s16(y_filter);

  *sum0 = vmull_lane_s16(vget_low_s16(s0), y_filter_lo, 0);
  *sum0 = vmlal_lane_s16(*sum0, vget_low_s16(s1), y_filter_lo, 1);
  *sum0 = vmlal_lane_s16(*sum0, vget_low_s16(s2), y_filter_lo, 2);
  *sum0 = vmlal_lane_s16(*sum0, vget_low_s16(s3), y_filter_lo, 3);
  *sum0 = vmlal_lane_s16(*sum0, vget_low_s16(s4), y_filter_hi, 0);
  *sum0 = vmlal_lane_s16(*sum0, vget_low_s16(s5), y_filter_hi, 1);
  *sum0 = vmlal_lane_s16(*sum0, vget_low_s16(s6), y_filter_hi, 2);
  *sum0 = vmlal_lane_s16(*sum0, vget_low_s16(s7), y_filter_hi, 3);

  *sum1 = vmull_lane_s16(vget_high_s16(s0), y_filter_lo, 0);
  *sum1 = vmlal_lane_s16(*sum1, vget_high_s16(s1), y_filter_lo, 1);
  *sum1 = vmlal_lane_s16(*sum1, vget_high_s16(s2), y_filter_lo, 2);
  *sum1 = vmlal_lane_s16(*sum1, vget_high_s16(s3), y_filter_lo, 3);
  *sum1 = vmlal_lane_s16(*sum1, vget_high_s16(s4), y_filter_hi, 0);
  *sum1 = vmlal_lane_s16(*sum1, vget_high_s16(s5), y_filter_hi, 1);
  *sum1 = vmlal_lane_s16(*sum1, vget_high_s16(s6), y_filter_hi, 2);
  *sum1 = vmlal_lane_s16(*sum1, vget_high_s16(s7), y_filter_hi, 3);
}

static INLINE uint16x8_t highbd_convolve8_8_s32_s16(
    const int16x8_t s0, const int16x8_t s1, const int16x8_t s2,
    const int16x8_t s3, const int16x8_t s4, const int16x8_t s5,
    const int16x8_t s6, const int16x8_t s7, const int16x8_t y_filter) {
  int32x4_t sum0;
  int32x4_t sum1;
  highbd_convolve8_8_s32(s0, s1, s2, s3, s4, s5, s6, s7, y_filter, &sum0,
                         &sum1);

  return vcombine_u16(vqrshrun_n_s32(sum0, COMPOUND_ROUND1_BITS),
                      vqrshrun_n_s32(sum1, COMPOUND_ROUND1_BITS));
}

#endif  // AOM_AV1_COMMON_ARM_HIGHBD_CONVOLVE_NEON_H_