/*
 * Copyright (c) 2024, 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 <arm_neon.h>
#include <assert.h>

#include "common_dsp_rtcd.h"
#include "convolve.h"
#include "definitions.h"
#include "mem_neon.h"

static inline uint16x4_t highbd_convolve6_4_y(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 int16x8_t y_filter, const uint16x4_t max) {
    // Values at indices 0 and 7 of y_filter are zero.
    const int16x4_t y_filter_0_3 = vget_low_s16(y_filter);
    const int16x4_t y_filter_4_7 = vget_high_s16(y_filter);

    int32x4_t sum = vmull_lane_s16(s0, y_filter_0_3, 1);
    sum           = vmlal_lane_s16(sum, s1, y_filter_0_3, 2);
    sum           = vmlal_lane_s16(sum, s2, y_filter_0_3, 3);
    sum           = vmlal_lane_s16(sum, s3, y_filter_4_7, 0);
    sum           = vmlal_lane_s16(sum, s4, y_filter_4_7, 1);
    sum           = vmlal_lane_s16(sum, s5, y_filter_4_7, 2);

    uint16x4_t res = vqrshrun_n_s32(sum, COMPOUND_ROUND1_BITS);
    return vmin_u16(res, max);
}

static inline uint16x8_t highbd_convolve6_8_y(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 y_filter, const uint16x8_t max) {
    // Values at indices 0 and 7 of y_filter are zero.
    const int16x4_t y_filter_0_3 = vget_low_s16(y_filter);
    const int16x4_t y_filter_4_7 = vget_high_s16(y_filter);

    int32x4_t sum0 = vmull_lane_s16(vget_low_s16(s0), y_filter_0_3, 1);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s1), y_filter_0_3, 2);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s2), y_filter_0_3, 3);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s3), y_filter_4_7, 0);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s4), y_filter_4_7, 1);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s5), y_filter_4_7, 2);

    int32x4_t sum1 = vmull_lane_s16(vget_high_s16(s0), y_filter_0_3, 1);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s1), y_filter_0_3, 2);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s2), y_filter_0_3, 3);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s3), y_filter_4_7, 0);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s4), y_filter_4_7, 1);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s5), y_filter_4_7, 2);

    uint16x8_t res = vcombine_u16(vqrshrun_n_s32(sum0, COMPOUND_ROUND1_BITS),
                                  vqrshrun_n_s32(sum1, COMPOUND_ROUND1_BITS));
    return vminq_u16(res, max);
}

static inline void highbd_convolve_y_sr_6tap_neon(const uint16_t *src_ptr, int src_stride, uint16_t *dst_ptr,
                                                  int dst_stride, int w, int h, const int16_t *y_filter_ptr,
                                                  const int bd) {
    const int16x8_t y_filter_0_7 = vld1q_s16(y_filter_ptr);

    if (w == 4) {
        const uint16x4_t max = vdup_n_u16((1 << bd) - 1);
        const int16_t   *s   = (const int16_t *)(src_ptr + src_stride);
        uint16_t        *d   = dst_ptr;

        int16x4_t s0, s1, s2, s3, s4;
        load_s16_4x5(s, src_stride, &s0, &s1, &s2, &s3, &s4);
        s += 5 * src_stride;

        do {
            int16x4_t s5, s6, s7, s8;
            load_s16_4x4(s, src_stride, &s5, &s6, &s7, &s8);

            uint16x4_t d0 = highbd_convolve6_4_y(s0, s1, s2, s3, s4, s5, y_filter_0_7, max);
            uint16x4_t d1 = highbd_convolve6_4_y(s1, s2, s3, s4, s5, s6, y_filter_0_7, max);
            uint16x4_t d2 = highbd_convolve6_4_y(s2, s3, s4, s5, s6, s7, y_filter_0_7, max);
            uint16x4_t d3 = highbd_convolve6_4_y(s3, s4, s5, s6, s7, s8, y_filter_0_7, max);

            store_u16_4x4(d, dst_stride, d0, d1, d2, d3);

            s0 = s4;
            s1 = s5;
            s2 = s6;
            s3 = s7;
            s4 = s8;
            s += 4 * src_stride;
            d += 4 * dst_stride;
            h -= 4;
        } while (h != 0);
    } else {
        const uint16x8_t max = vdupq_n_u16((1 << bd) - 1);
        // Width is a multiple of 8 and height is a multiple of 4.
        do {
            int            height = h;
            const int16_t *s      = (const int16_t *)(src_ptr + src_stride);
            uint16_t      *d      = dst_ptr;

            int16x8_t s0, s1, s2, s3, s4;
            load_s16_8x5(s, src_stride, &s0, &s1, &s2, &s3, &s4);
            s += 5 * src_stride;

            do {
                int16x8_t s5, s6, s7, s8;
                load_s16_8x4(s, src_stride, &s5, &s6, &s7, &s8);

                uint16x8_t d0 = highbd_convolve6_8_y(s0, s1, s2, s3, s4, s5, y_filter_0_7, max);
                uint16x8_t d1 = highbd_convolve6_8_y(s1, s2, s3, s4, s5, s6, y_filter_0_7, max);
                uint16x8_t d2 = highbd_convolve6_8_y(s2, s3, s4, s5, s6, s7, y_filter_0_7, max);
                uint16x8_t d3 = highbd_convolve6_8_y(s3, s4, s5, s6, s7, s8, y_filter_0_7, max);

                store_u16_8x4(d, dst_stride, d0, d1, d2, d3);

                s0 = s4;
                s1 = s5;
                s2 = s6;
                s3 = s7;
                s4 = s8;
                s += 4 * src_stride;
                d += 4 * dst_stride;
                height -= 4;
            } while (height != 0);

            src_ptr += 8;
            dst_ptr += 8;
            w -= 8;
        } while (w != 0);
    }
}

static inline uint16x4_t highbd_convolve8_4_y(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 uint16x4_t max) {
    const int16x4_t y_filter_0_3 = vget_low_s16(y_filter);
    const int16x4_t y_filter_4_7 = vget_high_s16(y_filter);

    int32x4_t sum = vmull_lane_s16(s0, y_filter_0_3, 0);
    sum           = vmlal_lane_s16(sum, s1, y_filter_0_3, 1);
    sum           = vmlal_lane_s16(sum, s2, y_filter_0_3, 2);
    sum           = vmlal_lane_s16(sum, s3, y_filter_0_3, 3);
    sum           = vmlal_lane_s16(sum, s4, y_filter_4_7, 0);
    sum           = vmlal_lane_s16(sum, s5, y_filter_4_7, 1);
    sum           = vmlal_lane_s16(sum, s6, y_filter_4_7, 2);
    sum           = vmlal_lane_s16(sum, s7, y_filter_4_7, 3);

    uint16x4_t res = vqrshrun_n_s32(sum, COMPOUND_ROUND1_BITS);
    return vmin_u16(res, max);
}

static inline uint16x8_t highbd_convolve8_8_y(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,
                                              const uint16x8_t max) {
    const int16x4_t y_filter_0_3 = vget_low_s16(y_filter);
    const int16x4_t y_filter_4_7 = vget_high_s16(y_filter);

    int32x4_t sum0 = vmull_lane_s16(vget_low_s16(s0), y_filter_0_3, 0);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s1), y_filter_0_3, 1);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s2), y_filter_0_3, 2);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s3), y_filter_0_3, 3);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s4), y_filter_4_7, 0);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s5), y_filter_4_7, 1);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s6), y_filter_4_7, 2);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s7), y_filter_4_7, 3);

    int32x4_t sum1 = vmull_lane_s16(vget_high_s16(s0), y_filter_0_3, 0);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s1), y_filter_0_3, 1);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s2), y_filter_0_3, 2);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s3), y_filter_0_3, 3);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s4), y_filter_4_7, 0);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s5), y_filter_4_7, 1);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s6), y_filter_4_7, 2);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s7), y_filter_4_7, 3);

    uint16x8_t res = vcombine_u16(vqrshrun_n_s32(sum0, COMPOUND_ROUND1_BITS),
                                  vqrshrun_n_s32(sum1, COMPOUND_ROUND1_BITS));
    return vminq_u16(res, max);
}

static inline void highbd_convolve_y_sr_8tap_neon(const uint16_t *src_ptr, int src_stride, uint16_t *dst_ptr,
                                                  int dst_stride, int w, int h, const int16_t *y_filter_ptr, int bd) {
    const int16x8_t y_filter = vld1q_s16(y_filter_ptr);

    if (w == 4) {
        const uint16x4_t max = vdup_n_u16((1 << bd) - 1);
        const int16_t   *s   = (const int16_t *)src_ptr;
        uint16_t        *d   = dst_ptr;

        int16x4_t s0, s1, s2, s3, s4, s5, s6;
        load_s16_4x7(s, src_stride, &s0, &s1, &s2, &s3, &s4, &s5, &s6);
        s += 7 * src_stride;

        do {
            int16x4_t s7, s8, s9, s10;
            load_s16_4x4(s, src_stride, &s7, &s8, &s9, &s10);

            uint16x4_t d0 = highbd_convolve8_4_y(s0, s1, s2, s3, s4, s5, s6, s7, y_filter, max);
            uint16x4_t d1 = highbd_convolve8_4_y(s1, s2, s3, s4, s5, s6, s7, s8, y_filter, max);
            uint16x4_t d2 = highbd_convolve8_4_y(s2, s3, s4, s5, s6, s7, s8, s9, y_filter, max);
            uint16x4_t d3 = highbd_convolve8_4_y(s3, s4, s5, s6, s7, s8, s9, s10, y_filter, max);

            store_u16_4x4(d, dst_stride, d0, d1, d2, d3);

            s0 = s4;
            s1 = s5;
            s2 = s6;
            s3 = s7;
            s4 = s8;
            s5 = s9;
            s6 = s10;
            s += 4 * src_stride;
            d += 4 * dst_stride;
            h -= 4;
        } while (h != 0);
    } else {
        const uint16x8_t max = vdupq_n_u16((1 << bd) - 1);

        do {
            int            height = h;
            const int16_t *s      = (const int16_t *)src_ptr;
            uint16_t      *d      = dst_ptr;

            int16x8_t s0, s1, s2, s3, s4, s5, s6;
            load_s16_8x7(s, src_stride, &s0, &s1, &s2, &s3, &s4, &s5, &s6);
            s += 7 * src_stride;

            do {
                int16x8_t s7, s8, s9, s10;
                load_s16_8x4(s, src_stride, &s7, &s8, &s9, &s10);

                uint16x8_t d0 = highbd_convolve8_8_y(s0, s1, s2, s3, s4, s5, s6, s7, y_filter, max);
                uint16x8_t d1 = highbd_convolve8_8_y(s1, s2, s3, s4, s5, s6, s7, s8, y_filter, max);
                uint16x8_t d2 = highbd_convolve8_8_y(s2, s3, s4, s5, s6, s7, s8, s9, y_filter, max);
                uint16x8_t d3 = highbd_convolve8_8_y(s3, s4, s5, s6, s7, s8, s9, s10, y_filter, max);

                store_u16_8x4(d, dst_stride, d0, d1, d2, d3);

                s0 = s4;
                s1 = s5;
                s2 = s6;
                s3 = s7;
                s4 = s8;
                s5 = s9;
                s6 = s10;
                s += 4 * src_stride;
                d += 4 * dst_stride;
                height -= 4;
            } while (height != 0);
            src_ptr += 8;
            dst_ptr += 8;
            w -= 8;
        } while (w != 0);
    }
}

void svt_av1_highbd_convolve_y_sr_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 subpel_y_qn, ConvolveParams *conv_params, int bd) {
    if (w == 2 || h == 2) {
        svt_av1_highbd_convolve_y_sr_c(src,
                                       src_stride,
                                       dst,
                                       dst_stride,
                                       w,
                                       h,
                                       filter_params_x,
                                       filter_params_y,
                                       subpel_x_qn,
                                       subpel_y_qn,
                                       conv_params,
                                       bd);
        return;
    }
    const int      y_filter_taps = get_filter_tap(filter_params_y, subpel_y_qn);
    const int      vert_offset   = filter_params_y->taps / 2 - 1;
    const int16_t *y_filter_ptr  = av1_get_interp_filter_subpel_kernel(*filter_params_y, subpel_y_qn & SUBPEL_MASK);

    src -= vert_offset * src_stride;

    if (y_filter_taps < 8) {
        highbd_convolve_y_sr_6tap_neon(src, src_stride, dst, dst_stride, w, h, y_filter_ptr, bd);
        return;
    }

    highbd_convolve_y_sr_8tap_neon(src, src_stride, dst, dst_stride, w, h, y_filter_ptr, bd);
}

static inline uint16x8_t highbd_convolve6_8_x(const int16x8_t s[6], const int16x8_t x_filter, const uint16x8_t max) {
    // Values at indices 0 and 7 of y_filter are zero.
    const int16x4_t x_filter_0_3 = vget_low_s16(x_filter);
    const int16x4_t x_filter_4_7 = vget_high_s16(x_filter);

    // This shim allows us to do only one rounding shift instead of two.
    int32x4_t sum0 = vdupq_n_s32(1 << (ROUND0_BITS - 1));
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[0]), x_filter_0_3, 1);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[1]), x_filter_0_3, 2);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[2]), x_filter_0_3, 3);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[3]), x_filter_4_7, 0);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[4]), x_filter_4_7, 1);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[5]), x_filter_4_7, 2);

    // This shim allows us to do only one rounding shift instead of two.
    int32x4_t sum1 = vdupq_n_s32(1 << (ROUND0_BITS - 1));
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[0]), x_filter_0_3, 1);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[1]), x_filter_0_3, 2);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[2]), x_filter_0_3, 3);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[3]), x_filter_4_7, 0);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[4]), x_filter_4_7, 1);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[5]), x_filter_4_7, 2);

    uint16x8_t res = vcombine_u16(vqrshrun_n_s32(sum0, FILTER_BITS), vqrshrun_n_s32(sum1, FILTER_BITS));
    return vminq_u16(res, max);
}

static inline void highbd_convolve_x_sr_6tap_neon(const uint16_t *src_ptr, int src_stride, uint16_t *dst_ptr,
                                                  int dst_stride, int w, int h, const int16_t *x_filter_ptr, int bd) {
    const int16x8_t  x_filter = vld1q_s16(x_filter_ptr);
    const uint16x8_t max      = vdupq_n_u16((1 << bd) - 1);

    int height = h;

    do {
        int            width = w;
        const int16_t *s     = (const int16_t *)src_ptr;
        uint16_t      *d     = dst_ptr;

        do {
            int16x8_t s0[6], s1[6], s2[6], s3[6];
            load_s16_8x6(s + 0 * src_stride, 1, &s0[0], &s0[1], &s0[2], &s0[3], &s0[4], &s0[5]);
            load_s16_8x6(s + 1 * src_stride, 1, &s1[0], &s1[1], &s1[2], &s1[3], &s1[4], &s1[5]);
            load_s16_8x6(s + 2 * src_stride, 1, &s2[0], &s2[1], &s2[2], &s2[3], &s2[4], &s2[5]);
            load_s16_8x6(s + 3 * src_stride, 1, &s3[0], &s3[1], &s3[2], &s3[3], &s3[4], &s3[5]);

            uint16x8_t d0 = highbd_convolve6_8_x(s0, x_filter, max);
            uint16x8_t d1 = highbd_convolve6_8_x(s1, x_filter, max);
            uint16x8_t d2 = highbd_convolve6_8_x(s2, x_filter, max);
            uint16x8_t d3 = highbd_convolve6_8_x(s3, x_filter, max);

            store_u16_8x4(d, dst_stride, d0, d1, d2, d3);

            s += 8;
            d += 8;
            width -= 8;
        } while (width != 0);

        src_ptr += 4 * src_stride;
        dst_ptr += 4 * dst_stride;
        height -= 4;
    } while (height != 0);
}

static inline uint16x4_t highbd_convolve4_4_x(const int16x4_t s[4], const int16x4_t x_filter, const uint16x4_t max) {
    // This shim allows us to do only one rounding shift instead of two.
    int32x4_t sum = vdupq_n_s32(1 << (ROUND0_BITS - 1));
    sum           = vmlal_lane_s16(sum, s[0], x_filter, 0);
    sum           = vmlal_lane_s16(sum, s[1], x_filter, 1);
    sum           = vmlal_lane_s16(sum, s[2], x_filter, 2);
    sum           = vmlal_lane_s16(sum, s[3], x_filter, 3);

    uint16x4_t res = vqrshrun_n_s32(sum, FILTER_BITS);
    return vmin_u16(res, max);
}

static inline uint16x8_t highbd_convolve8_8_x(const int16x8_t s[8], const int16x8_t x_filter, const uint16x8_t max) {
    const int16x4_t x_filter_0_3 = vget_low_s16(x_filter);
    const int16x4_t x_filter_4_7 = vget_high_s16(x_filter);

    // This shim allows us to do only one rounding shift instead of two.
    int32x4_t sum0 = vdupq_n_s32(1 << (ROUND0_BITS - 1));
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[0]), x_filter_0_3, 0);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[1]), x_filter_0_3, 1);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[2]), x_filter_0_3, 2);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[3]), x_filter_0_3, 3);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[4]), x_filter_4_7, 0);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[5]), x_filter_4_7, 1);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[6]), x_filter_4_7, 2);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[7]), x_filter_4_7, 3);

    // This shim allows us to do only one rounding shift instead of two.
    int32x4_t sum1 = vdupq_n_s32(1 << (ROUND0_BITS - 1));
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[0]), x_filter_0_3, 0);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[1]), x_filter_0_3, 1);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[2]), x_filter_0_3, 2);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[3]), x_filter_0_3, 3);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[4]), x_filter_4_7, 0);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[5]), x_filter_4_7, 1);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[6]), x_filter_4_7, 2);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[7]), x_filter_4_7, 3);

    uint16x8_t res = vcombine_u16(vqrshrun_n_s32(sum0, FILTER_BITS), vqrshrun_n_s32(sum1, FILTER_BITS));
    return vminq_u16(res, max);
}

static inline void highbd_convolve_x_sr_neon(const uint16_t *src_ptr, int src_stride, uint16_t *dst_ptr, int dst_stride,
                                             int w, int h, const int16_t *x_filter_ptr, int bd) {
    if (w == 4) {
        const uint16x4_t max = vdup_n_u16((1 << bd) - 1);
        // 4-tap filters are used for blocks having width == 4.
        const int16x4_t x_filter = vld1_s16(x_filter_ptr + 2);
        const int16_t  *s        = (const int16_t *)(src_ptr + 2);
        uint16_t       *d        = dst_ptr;

        do {
            int16x4_t s0[4], s1[4], s2[4], s3[4];
            load_s16_4x4(s + 0 * src_stride, 1, &s0[0], &s0[1], &s0[2], &s0[3]);
            load_s16_4x4(s + 1 * src_stride, 1, &s1[0], &s1[1], &s1[2], &s1[3]);
            load_s16_4x4(s + 2 * src_stride, 1, &s2[0], &s2[1], &s2[2], &s2[3]);
            load_s16_4x4(s + 3 * src_stride, 1, &s3[0], &s3[1], &s3[2], &s3[3]);

            uint16x4_t d0 = highbd_convolve4_4_x(s0, x_filter, max);
            uint16x4_t d1 = highbd_convolve4_4_x(s1, x_filter, max);
            uint16x4_t d2 = highbd_convolve4_4_x(s2, x_filter, max);
            uint16x4_t d3 = highbd_convolve4_4_x(s3, x_filter, max);

            store_u16_4x4(d, dst_stride, d0, d1, d2, d3);

            s += 4 * src_stride;
            d += 4 * dst_stride;
            h -= 4;
        } while (h != 0);
    } else {
        const uint16x8_t max      = vdupq_n_u16((1 << bd) - 1);
        const int16x8_t  x_filter = vld1q_s16(x_filter_ptr);
        int              height   = h;

        do {
            int            width = w;
            const int16_t *s     = (const int16_t *)src_ptr;
            uint16_t      *d     = dst_ptr;

            do {
                int16x8_t s0[8], s1[8], s2[8], s3[8];
                load_s16_8x8(s + 0 * src_stride, 1, &s0[0], &s0[1], &s0[2], &s0[3], &s0[4], &s0[5], &s0[6], &s0[7]);
                load_s16_8x8(s + 1 * src_stride, 1, &s1[0], &s1[1], &s1[2], &s1[3], &s1[4], &s1[5], &s1[6], &s1[7]);
                load_s16_8x8(s + 2 * src_stride, 1, &s2[0], &s2[1], &s2[2], &s2[3], &s2[4], &s2[5], &s2[6], &s2[7]);
                load_s16_8x8(s + 3 * src_stride, 1, &s3[0], &s3[1], &s3[2], &s3[3], &s3[4], &s3[5], &s3[6], &s3[7]);

                uint16x8_t d0 = highbd_convolve8_8_x(s0, x_filter, max);
                uint16x8_t d1 = highbd_convolve8_8_x(s1, x_filter, max);
                uint16x8_t d2 = highbd_convolve8_8_x(s2, x_filter, max);
                uint16x8_t d3 = highbd_convolve8_8_x(s3, x_filter, max);

                store_u16_8x4(d, dst_stride, d0, d1, d2, d3);

                s += 8;
                d += 8;
                width -= 8;
            } while (width != 0);
            src_ptr += 4 * src_stride;
            dst_ptr += 4 * dst_stride;
            height -= 4;
        } while (height != 0);
    }
}

void svt_av1_highbd_convolve_x_sr_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 subpel_y_qn, ConvolveParams *conv_params, int bd) {
    (void)filter_params_y;
    (void)subpel_y_qn;
    if (w == 2 || h == 2) {
        svt_av1_highbd_convolve_x_sr_c(src,
                                       src_stride,
                                       dst,
                                       dst_stride,
                                       w,
                                       h,
                                       filter_params_x,
                                       filter_params_y,
                                       subpel_x_qn,
                                       subpel_y_qn,
                                       conv_params,
                                       bd);
        return;
    }
    const int      x_filter_taps = get_filter_tap(filter_params_x, subpel_x_qn);
    const int      horiz_offset  = filter_params_x->taps / 2 - 1;
    const int16_t *x_filter_ptr  = av1_get_interp_filter_subpel_kernel(*filter_params_x, subpel_x_qn & SUBPEL_MASK);

    src -= horiz_offset;

    if (x_filter_taps <= 6 && w != 4) {
        highbd_convolve_x_sr_6tap_neon(src + 1, src_stride, dst, dst_stride, w, h, x_filter_ptr, bd);
        return;
    }

    highbd_convolve_x_sr_neon(src, src_stride, dst, dst_stride, w, h, x_filter_ptr, bd);
}

static inline uint16x4_t highbd_convolve6_4_2d_v(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 int16x8_t y_filter, const int32x4_t offset,
                                                 const uint16x4_t max) {
    // Values at indices 0 and 7 of y_filter are zero.
    const int16x4_t y_filter_0_3 = vget_low_s16(y_filter);
    const int16x4_t y_filter_4_7 = vget_high_s16(y_filter);

    int32x4_t sum = vmlal_lane_s16(offset, s0, y_filter_0_3, 1);
    sum           = vmlal_lane_s16(sum, s1, y_filter_0_3, 2);
    sum           = vmlal_lane_s16(sum, s2, y_filter_0_3, 3);
    sum           = vmlal_lane_s16(sum, s3, y_filter_4_7, 0);
    sum           = vmlal_lane_s16(sum, s4, y_filter_4_7, 1);
    sum           = vmlal_lane_s16(sum, s5, y_filter_4_7, 2);

    uint16x4_t res = vqshrun_n_s32(sum, 2 * FILTER_BITS - ROUND0_BITS);
    return vmin_u16(res, max);
}

static inline uint16x8_t highbd_convolve6_8_2d_v(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 y_filter, const int32x4_t offset,
                                                 const uint16x8_t max) {
    // Values at indices 0 and 7 of y_filter are zero.
    const int16x4_t y_filter_0_3 = vget_low_s16(y_filter);
    const int16x4_t y_filter_4_7 = vget_high_s16(y_filter);

    int32x4_t sum0 = vmlal_lane_s16(offset, vget_low_s16(s0), y_filter_0_3, 1);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s1), y_filter_0_3, 2);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s2), y_filter_0_3, 3);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s3), y_filter_4_7, 0);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s4), y_filter_4_7, 1);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s5), y_filter_4_7, 2);

    int32x4_t sum1 = vmlal_lane_s16(offset, vget_high_s16(s0), y_filter_0_3, 1);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s1), y_filter_0_3, 2);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s2), y_filter_0_3, 3);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s3), y_filter_4_7, 0);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s4), y_filter_4_7, 1);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s5), y_filter_4_7, 2);

    uint16x4_t res0 = vqshrun_n_s32(sum0, 2 * FILTER_BITS - ROUND0_BITS);
    uint16x4_t res1 = vqshrun_n_s32(sum1, 2 * FILTER_BITS - ROUND0_BITS);

    uint16x8_t res = vcombine_u16(res0, res1);
    return vminq_u16(res, max);
}

static inline void highbd_convolve_2d_sr_vert_6tap_neon(const uint16_t *src_ptr, int src_stride, uint16_t *dst_ptr,
                                                        int dst_stride, int w, int h, const int16_t *y_filter_ptr,
                                                        int bd, const int offset) {
    const int16x8_t y_filter   = vld1q_s16(y_filter_ptr);
    const int32x4_t offset_s32 = vdupq_n_s32(offset);

    if (w == 4) {
        const uint16x4_t max = vdup_n_u16((1 << bd) - 1);
        const int16_t   *s   = (const int16_t *)src_ptr;
        uint16_t        *d   = dst_ptr;
        int16x4_t        s0, s1, s2, s3, s4;
        load_s16_4x5(s, src_stride, &s0, &s1, &s2, &s3, &s4);
        s += 5 * src_stride;

        do {
            int16x4_t s5, s6, s7, s8;
            load_s16_4x4(s, src_stride, &s5, &s6, &s7, &s8);

            uint16x4_t d0 = highbd_convolve6_4_2d_v(s0, s1, s2, s3, s4, s5, y_filter, offset_s32, max);
            uint16x4_t d1 = highbd_convolve6_4_2d_v(s1, s2, s3, s4, s5, s6, y_filter, offset_s32, max);
            uint16x4_t d2 = highbd_convolve6_4_2d_v(s2, s3, s4, s5, s6, s7, y_filter, offset_s32, max);
            uint16x4_t d3 = highbd_convolve6_4_2d_v(s3, s4, s5, s6, s7, s8, y_filter, offset_s32, max);

            store_u16_4x4(d, dst_stride, d0, d1, d2, d3);

            s0 = s4;
            s1 = s5;
            s2 = s6;
            s3 = s7;
            s4 = s8;
            s += 4 * src_stride;
            d += 4 * dst_stride;
            h -= 4;
        } while (h != 0);
    } else {
        const uint16x8_t max = vdupq_n_u16((1 << bd) - 1);

        do {
            int            height = h;
            const int16_t *s      = (const int16_t *)src_ptr;
            uint16_t      *d      = dst_ptr;
            int16x8_t      s0, s1, s2, s3, s4;
            load_s16_8x5(s, src_stride, &s0, &s1, &s2, &s3, &s4);
            s += 5 * src_stride;

            do {
                int16x8_t s5, s6, s7, s8;
                load_s16_8x4(s, src_stride, &s5, &s6, &s7, &s8);

                uint16x8_t d0 = highbd_convolve6_8_2d_v(s0, s1, s2, s3, s4, s5, y_filter, offset_s32, max);
                uint16x8_t d1 = highbd_convolve6_8_2d_v(s1, s2, s3, s4, s5, s6, y_filter, offset_s32, max);
                uint16x8_t d2 = highbd_convolve6_8_2d_v(s2, s3, s4, s5, s6, s7, y_filter, offset_s32, max);
                uint16x8_t d3 = highbd_convolve6_8_2d_v(s3, s4, s5, s6, s7, s8, y_filter, offset_s32, max);

                store_u16_8x4(d, dst_stride, d0, d1, d2, d3);

                s0 = s4;
                s1 = s5;
                s2 = s6;
                s3 = s7;
                s4 = s8;
                s += 4 * src_stride;
                d += 4 * dst_stride;
                height -= 4;
            } while (height != 0);
            src_ptr += 8;
            dst_ptr += 8;
            w -= 8;
        } while (w != 0);
    }
}

static inline uint16x4_t highbd_convolve8_4_2d_v(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 int32x4_t offset, const uint16x4_t max) {
    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 = vmlal_lane_s16(offset, 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);

    uint16x4_t res = vqshrun_n_s32(sum, 2 * FILTER_BITS - ROUND0_BITS);
    return vmin_u16(res, max);
}

static inline uint16x8_t highbd_convolve8_8_2d_v(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,
                                                 const int32x4_t offset, const uint16x8_t max) {
    const int16x4_t y_filter_lo = vget_low_s16(y_filter);
    const int16x4_t y_filter_hi = vget_high_s16(y_filter);

    int32x4_t sum0 = vmlal_lane_s16(offset, 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);

    int32x4_t sum1 = vmlal_lane_s16(offset, 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);

    uint16x4_t res0 = vqshrun_n_s32(sum0, 2 * FILTER_BITS - ROUND0_BITS);
    uint16x4_t res1 = vqshrun_n_s32(sum1, 2 * FILTER_BITS - ROUND0_BITS);

    uint16x8_t res = vcombine_u16(res0, res1);
    return vminq_u16(res, max);
}

static inline void highbd_convolve_2d_sr_vert_8tap_neon(const uint16_t *src_ptr, int src_stride, uint16_t *dst_ptr,
                                                        int dst_stride, int w, int h, const int16_t *y_filter_ptr,
                                                        int bd, const int offset) {
    const int16x8_t y_filter   = vld1q_s16(y_filter_ptr);
    const int32x4_t offset_s32 = vdupq_n_s32(offset);

    if (w == 4) {
        const uint16x4_t max = vdup_n_u16((1 << bd) - 1);
        const int16_t   *s   = (const int16_t *)src_ptr;
        uint16_t        *d   = dst_ptr;

        int16x4_t s0, s1, s2, s3, s4, s5, s6;
        load_s16_4x7(s, src_stride, &s0, &s1, &s2, &s3, &s4, &s5, &s6);
        s += 7 * src_stride;

        do {
            int16x4_t s7, s8, s9, s10;
            load_s16_4x4(s, src_stride, &s7, &s8, &s9, &s10);

            uint16x4_t d0 = highbd_convolve8_4_2d_v(s0, s1, s2, s3, s4, s5, s6, s7, y_filter, offset_s32, max);
            uint16x4_t d1 = highbd_convolve8_4_2d_v(s1, s2, s3, s4, s5, s6, s7, s8, y_filter, offset_s32, max);
            uint16x4_t d2 = highbd_convolve8_4_2d_v(s2, s3, s4, s5, s6, s7, s8, s9, y_filter, offset_s32, max);
            uint16x4_t d3 = highbd_convolve8_4_2d_v(s3, s4, s5, s6, s7, s8, s9, s10, y_filter, offset_s32, max);

            store_u16_4x4(d, dst_stride, d0, d1, d2, d3);

            s0 = s4;
            s1 = s5;
            s2 = s6;
            s3 = s7;
            s4 = s8;
            s5 = s9;
            s6 = s10;
            s += 4 * src_stride;
            d += 4 * dst_stride;
            h -= 4;
        } while (h != 0);
    } else {
        const uint16x8_t max = vdupq_n_u16((1 << bd) - 1);

        do {
            int            height = h;
            const int16_t *s      = (const int16_t *)src_ptr;
            uint16_t      *d      = dst_ptr;

            int16x8_t s0, s1, s2, s3, s4, s5, s6;
            load_s16_8x7(s, src_stride, &s0, &s1, &s2, &s3, &s4, &s5, &s6);
            s += 7 * src_stride;

            do {
                int16x8_t s7, s8, s9, s10;
                load_s16_8x4(s, src_stride, &s7, &s8, &s9, &s10);

                uint16x8_t d0 = highbd_convolve8_8_2d_v(s0, s1, s2, s3, s4, s5, s6, s7, y_filter, offset_s32, max);
                uint16x8_t d1 = highbd_convolve8_8_2d_v(s1, s2, s3, s4, s5, s6, s7, s8, y_filter, offset_s32, max);
                uint16x8_t d2 = highbd_convolve8_8_2d_v(s2, s3, s4, s5, s6, s7, s8, s9, y_filter, offset_s32, max);
                uint16x8_t d3 = highbd_convolve8_8_2d_v(s3, s4, s5, s6, s7, s8, s9, s10, y_filter, offset_s32, max);

                store_u16_8x4(d, dst_stride, d0, d1, d2, d3);

                s0 = s4;
                s1 = s5;
                s2 = s6;
                s3 = s7;
                s4 = s8;
                s5 = s9;
                s6 = s10;
                s += 4 * src_stride;
                d += 4 * dst_stride;
                height -= 4;
            } while (height != 0);
            src_ptr += 8;
            dst_ptr += 8;
            w -= 8;
        } while (w != 0);
    }
}

static inline uint16x8_t highbd_convolve6_8_2d_h(const int16x8_t s[6], const int16x8_t x_filter,
                                                 const int32x4_t offset) {
    // Values at indices 0 and 7 of y_filter are zero.
    const int16x4_t x_filter_0_3 = vget_low_s16(x_filter);
    const int16x4_t x_filter_4_7 = vget_high_s16(x_filter);

    int32x4_t sum0 = vmlal_lane_s16(offset, vget_low_s16(s[0]), x_filter_0_3, 1);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[1]), x_filter_0_3, 2);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[2]), x_filter_0_3, 3);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[3]), x_filter_4_7, 0);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[4]), x_filter_4_7, 1);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[5]), x_filter_4_7, 2);

    int32x4_t sum1 = vmlal_lane_s16(offset, vget_high_s16(s[0]), x_filter_0_3, 1);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[1]), x_filter_0_3, 2);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[2]), x_filter_0_3, 3);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[3]), x_filter_4_7, 0);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[4]), x_filter_4_7, 1);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[5]), x_filter_4_7, 2);

    uint16x4_t res0 = vqrshrun_n_s32(sum0, ROUND0_BITS);
    uint16x4_t res1 = vqrshrun_n_s32(sum1, ROUND0_BITS);

    return vcombine_u16(res0, res1);
}

static inline void highbd_convolve_2d_sr_horiz_6tap_neon(const uint16_t *src_ptr, int src_stride, uint16_t *dst_ptr,
                                                         int dst_stride, int w, int h, const int16_t *x_filter_ptr,
                                                         const int offset) {
    // The smallest block height processed by the SIMD functions is 4, and the
    // horizontal convolution needs to process an extra (filter_taps/2 - 1) lines
    // for the vertical convolution.
    assert(h >= 5);
    const int32x4_t offset_s32 = vdupq_n_s32(offset);

    const int16x8_t x_filter = vld1q_s16(x_filter_ptr);
    int             height   = h;

    do {
        int            width = w;
        const int16_t *s     = (const int16_t *)src_ptr;
        uint16_t      *d     = dst_ptr;

        do {
            int16x8_t s0[6], s1[6], s2[6], s3[6];
            load_s16_8x6(s + 0 * src_stride, 1, &s0[0], &s0[1], &s0[2], &s0[3], &s0[4], &s0[5]);
            load_s16_8x6(s + 1 * src_stride, 1, &s1[0], &s1[1], &s1[2], &s1[3], &s1[4], &s1[5]);
            load_s16_8x6(s + 2 * src_stride, 1, &s2[0], &s2[1], &s2[2], &s2[3], &s2[4], &s2[5]);
            load_s16_8x6(s + 3 * src_stride, 1, &s3[0], &s3[1], &s3[2], &s3[3], &s3[4], &s3[5]);

            uint16x8_t d0 = highbd_convolve6_8_2d_h(s0, x_filter, offset_s32);
            uint16x8_t d1 = highbd_convolve6_8_2d_h(s1, x_filter, offset_s32);
            uint16x8_t d2 = highbd_convolve6_8_2d_h(s2, x_filter, offset_s32);
            uint16x8_t d3 = highbd_convolve6_8_2d_h(s3, x_filter, offset_s32);

            store_u16_8x4(d, dst_stride, d0, d1, d2, d3);

            s += 8;
            d += 8;
            width -= 8;
        } while (width != 0);
        src_ptr += 4 * src_stride;
        dst_ptr += 4 * dst_stride;
        height -= 4;
    } while (height > 4);
    do {
        int            width = w;
        const int16_t *s     = (const int16_t *)src_ptr;
        uint16_t      *d     = dst_ptr;

        do {
            int16x8_t s0[6];
            load_s16_8x6(s, 1, &s0[0], &s0[1], &s0[2], &s0[3], &s0[4], &s0[5]);

            uint16x8_t d0 = highbd_convolve6_8_2d_h(s0, x_filter, offset_s32);
            vst1q_u16(d, d0);

            s += 8;
            d += 8;
            width -= 8;
        } while (width != 0);
        src_ptr += src_stride;
        dst_ptr += dst_stride;
    } while (--height != 0);
}

static inline uint16x4_t highbd_convolve4_4_2d_h(const int16x4_t s[4], const int16x4_t x_filter,
                                                 const int32x4_t offset) {
    int32x4_t sum = vmlal_lane_s16(offset, s[0], x_filter, 0);
    sum           = vmlal_lane_s16(sum, s[1], x_filter, 1);
    sum           = vmlal_lane_s16(sum, s[2], x_filter, 2);
    sum           = vmlal_lane_s16(sum, s[3], x_filter, 3);

    return vqrshrun_n_s32(sum, ROUND0_BITS);
}

static inline uint16x8_t highbd_convolve8_8_2d_h(const int16x8_t s[8], const int16x8_t x_filter,
                                                 const int32x4_t offset) {
    const int16x4_t x_filter_0_3 = vget_low_s16(x_filter);
    const int16x4_t x_filter_4_7 = vget_high_s16(x_filter);

    int32x4_t sum0 = vmlal_lane_s16(offset, vget_low_s16(s[0]), x_filter_0_3, 0);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[1]), x_filter_0_3, 1);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[2]), x_filter_0_3, 2);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[3]), x_filter_0_3, 3);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[4]), x_filter_4_7, 0);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[5]), x_filter_4_7, 1);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[6]), x_filter_4_7, 2);
    sum0           = vmlal_lane_s16(sum0, vget_low_s16(s[7]), x_filter_4_7, 3);

    int32x4_t sum1 = vmlal_lane_s16(offset, vget_high_s16(s[0]), x_filter_0_3, 0);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[1]), x_filter_0_3, 1);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[2]), x_filter_0_3, 2);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[3]), x_filter_0_3, 3);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[4]), x_filter_4_7, 0);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[5]), x_filter_4_7, 1);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[6]), x_filter_4_7, 2);
    sum1           = vmlal_lane_s16(sum1, vget_high_s16(s[7]), x_filter_4_7, 3);

    uint16x4_t res0 = vqrshrun_n_s32(sum0, ROUND0_BITS);
    uint16x4_t res1 = vqrshrun_n_s32(sum1, ROUND0_BITS);

    return vcombine_u16(res0, res1);
}

static inline void highbd_convolve_2d_sr_horiz_neon(const uint16_t *src_ptr, int src_stride, uint16_t *dst_ptr,
                                                    int dst_stride, int w, int h, const int16_t *x_filter_ptr,
                                                    const int offset) {
    // The smallest block height processed by the SIMD functions is 4, and the
    // horizontal convolution needs to process an extra (filter_taps/2 - 1) lines
    // for the vertical convolution.
    assert(h >= 5);
    const int32x4_t offset_s32 = vdupq_n_s32(offset);

    if (w == 4) {
        // 4-tap filters are used for blocks having width <= 4.
        const int16x4_t x_filter = vld1_s16(x_filter_ptr + 2);
        const int16_t  *s        = (const int16_t *)(src_ptr + 1);
        uint16_t       *d        = dst_ptr;

        do {
            int16x4_t s0[4], s1[4], s2[4], s3[4];
            load_s16_4x4(s + 0 * src_stride, 1, &s0[0], &s0[1], &s0[2], &s0[3]);
            load_s16_4x4(s + 1 * src_stride, 1, &s1[0], &s1[1], &s1[2], &s1[3]);
            load_s16_4x4(s + 2 * src_stride, 1, &s2[0], &s2[1], &s2[2], &s2[3]);
            load_s16_4x4(s + 3 * src_stride, 1, &s3[0], &s3[1], &s3[2], &s3[3]);

            uint16x4_t d0 = highbd_convolve4_4_2d_h(s0, x_filter, offset_s32);
            uint16x4_t d1 = highbd_convolve4_4_2d_h(s1, x_filter, offset_s32);
            uint16x4_t d2 = highbd_convolve4_4_2d_h(s2, x_filter, offset_s32);
            uint16x4_t d3 = highbd_convolve4_4_2d_h(s3, x_filter, offset_s32);

            store_u16_4x4(d, dst_stride, d0, d1, d2, d3);

            s += 4 * src_stride;
            d += 4 * dst_stride;
            h -= 4;
        } while (h > 4);

        do {
            int16x4_t s0[4];
            load_s16_4x4(s, 1, &s0[0], &s0[1], &s0[2], &s0[3]);

            uint16x4_t d0 = highbd_convolve4_4_2d_h(s0, x_filter, offset_s32);

            vst1_u16(d, d0);

            s += src_stride;
            d += dst_stride;
        } while (--h != 0);
    } else {
        const int16x8_t x_filter = vld1q_s16(x_filter_ptr);
        int             height   = h;

        do {
            int            width = w;
            const int16_t *s     = (const int16_t *)src_ptr;
            uint16_t      *d     = dst_ptr;

            do {
                int16x8_t s0[8], s1[8], s2[8], s3[8];
                load_s16_8x8(s + 0 * src_stride, 1, &s0[0], &s0[1], &s0[2], &s0[3], &s0[4], &s0[5], &s0[6], &s0[7]);
                load_s16_8x8(s + 1 * src_stride, 1, &s1[0], &s1[1], &s1[2], &s1[3], &s1[4], &s1[5], &s1[6], &s1[7]);
                load_s16_8x8(s + 2 * src_stride, 1, &s2[0], &s2[1], &s2[2], &s2[3], &s2[4], &s2[5], &s2[6], &s2[7]);
                load_s16_8x8(s + 3 * src_stride, 1, &s3[0], &s3[1], &s3[2], &s3[3], &s3[4], &s3[5], &s3[6], &s3[7]);

                uint16x8_t d0 = highbd_convolve8_8_2d_h(s0, x_filter, offset_s32);
                uint16x8_t d1 = highbd_convolve8_8_2d_h(s1, x_filter, offset_s32);
                uint16x8_t d2 = highbd_convolve8_8_2d_h(s2, x_filter, offset_s32);
                uint16x8_t d3 = highbd_convolve8_8_2d_h(s3, x_filter, offset_s32);

                store_u16_8x4(d, dst_stride, d0, d1, d2, d3);

                s += 8;
                d += 8;
                width -= 8;
            } while (width != 0);
            src_ptr += 4 * src_stride;
            dst_ptr += 4 * dst_stride;
            height -= 4;
        } while (height > 4);

        do {
            int            width = w;
            const int16_t *s     = (const int16_t *)src_ptr;
            uint16_t      *d     = dst_ptr;

            do {
                int16x8_t s0[8];
                load_s16_8x8(s + 0 * src_stride, 1, &s0[0], &s0[1], &s0[2], &s0[3], &s0[4], &s0[5], &s0[6], &s0[7]);

                uint16x8_t d0 = highbd_convolve8_8_2d_h(s0, x_filter, offset_s32);
                vst1q_u16(d, d0);

                s += 8;
                d += 8;
                width -= 8;
            } while (width != 0);
            src_ptr += src_stride;
            dst_ptr += dst_stride;
        } while (--height != 0);
    }
}

void svt_av1_highbd_convolve_2d_sr_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 subpel_y_qn, ConvolveParams *conv_params, int bd) {
    if (w == 2 || h == 2) {
        svt_av1_highbd_convolve_2d_sr_c(src,
                                        src_stride,
                                        dst,
                                        dst_stride,
                                        w,
                                        h,
                                        filter_params_x,
                                        filter_params_y,
                                        subpel_x_qn,
                                        subpel_y_qn,
                                        conv_params,
                                        bd);
        return;
    }
    DECLARE_ALIGNED(16, uint16_t, im_block[(MAX_SB_SIZE + MAX_FILTER_TAP) * MAX_SB_SIZE]);
    const int x_filter_taps  = get_filter_tap(filter_params_x, subpel_x_qn);
    const int clamped_x_taps = x_filter_taps < 6 ? 6 : x_filter_taps;

    const int y_filter_taps    = get_filter_tap(filter_params_y, subpel_y_qn);
    const int clamped_y_taps   = y_filter_taps < 6 ? 6 : y_filter_taps;
    const int im_h             = h + clamped_y_taps - 1;
    const int im_stride        = MAX_SB_SIZE;
    const int vert_offset      = clamped_y_taps / 2 - 1;
    const int horiz_offset     = clamped_x_taps / 2 - 1;
    const int x_offset_initial = (1 << (bd + FILTER_BITS - 1));
    const int y_offset_bits    = bd + 2 * FILTER_BITS - ROUND0_BITS;
    // The extra shim of (1 << (conv_params->round_1 - 1)) allows us to do a
    // simple shift left instead of a rounding saturating shift left.
    const int y_offset = (1 << (2 * FILTER_BITS - ROUND0_BITS - 1)) - (1 << (y_offset_bits - 1));

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

    const int16_t *x_filter_ptr = av1_get_interp_filter_subpel_kernel(*filter_params_x, subpel_x_qn & SUBPEL_MASK);
    const int16_t *y_filter_ptr = av1_get_interp_filter_subpel_kernel(*filter_params_y, subpel_y_qn & SUBPEL_MASK);

    if (x_filter_taps <= 6 && w != 4) {
        highbd_convolve_2d_sr_horiz_6tap_neon(
            src_ptr, src_stride, im_block, im_stride, w, im_h, x_filter_ptr, x_offset_initial);
    } else {
        highbd_convolve_2d_sr_horiz_neon(
            src_ptr, src_stride, im_block, im_stride, w, im_h, x_filter_ptr, x_offset_initial);
    }

    if (y_filter_taps <= 6) {
        highbd_convolve_2d_sr_vert_6tap_neon(im_block, im_stride, dst, dst_stride, w, h, y_filter_ptr, bd, y_offset);
    } else {
        highbd_convolve_2d_sr_vert_8tap_neon(im_block, im_stride, dst, dst_stride, w, h, y_filter_ptr, bd, y_offset);
    }
}

void svt_av1_highbd_convolve_2d_copy_sr_neon(const uint16_t *src, int32_t src_stride, uint16_t *dst, int32_t dst_stride,
                                             int32_t w, int32_t h, const InterpFilterParams *filter_params_x,
                                             const InterpFilterParams *filter_params_y, const int32_t subpel_x_q4,
                                             const int32_t subpel_y_q4, ConvolveParams *conv_params, int32_t bd) {
    (void)filter_params_x;
    (void)filter_params_y;
    (void)subpel_x_q4;
    (void)subpel_y_q4;
    (void)conv_params;
    (void)bd;

    if (w == 2 || h == 2) {
        svt_av1_highbd_convolve_2d_copy_sr_c(src,
                                             src_stride,
                                             dst,
                                             dst_stride,
                                             w,
                                             h,
                                             filter_params_x,
                                             filter_params_y,
                                             subpel_x_q4,
                                             subpel_y_q4,
                                             conv_params,
                                             bd);
        return;
    }

    if (w <= 4) {
        do {
            vst1_u16(dst, vld1_u16(src));

            src += src_stride;
            dst += dst_stride;
        } while (--h != 0);
    } else if (w == 8) {
        do {
            vst1q_u16(dst, vld1q_u16(src));

            src += src_stride;
            dst += dst_stride;
        } while (--h != 0);
    } else {
        assert(w % 16 == 0);
        do {
            int             width   = w;
            const uint16_t *src_ptr = src;
            uint16_t       *dst_ptr = dst;

            do {
                uint16x8_t s0, s1;
                load_u16_8x2(src_ptr, 8, &s0, &s1);
                store_u16_8x2(dst_ptr, 8, s0, s1);

                src_ptr += 16;
                dst_ptr += 16;
                width -= 16;
            } while (width != 0);
            src += src_stride;
            dst += dst_stride;
        } while (--h != 0);
    }
}
