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/*
* Copyright (c) 2014 The WebM project authors. All rights reserved.
* 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 <arm_neon.h>
#include <assert.h>
#include <string.h>
#include "config/aom_config.h"
#include "config/aom_dsp_rtcd.h"
#include "aom/aom_integer.h"
#include "aom_dsp/aom_dsp_common.h"
#include "aom_dsp/aom_filter.h"
#include "aom_dsp/arm/aom_convolve8_neon.h"
#include "aom_dsp/arm/aom_filter.h"
#include "aom_dsp/arm/mem_neon.h"
#include "aom_dsp/arm/transpose_neon.h"
#include "aom_ports/mem.h"
static inline void convolve8_horiz_8tap_neon(const uint8_t *src,
ptrdiff_t src_stride, uint8_t *dst,
ptrdiff_t dst_stride,
const int16_t *filter_x, int w,
int h) {
// All filter values are even so halve them to reduce intermediate precision
// requirements.
const int16x8_t filter = vshrq_n_s16(vld1q_s16(filter_x), 1);
if (h == 4) {
uint8x8_t t0, t1, t2, t3;
load_u8_8x4(src, src_stride, &t0, &t1, &t2, &t3);
transpose_elems_inplace_u8_8x4(&t0, &t1, &t2, &t3);
int16x4_t s0 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t0)));
int16x4_t s1 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t1)));
int16x4_t s2 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t2)));
int16x4_t s3 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t3)));
int16x4_t s4 = vget_high_s16(vreinterpretq_s16_u16(vmovl_u8(t0)));
int16x4_t s5 = vget_high_s16(vreinterpretq_s16_u16(vmovl_u8(t1)));
int16x4_t s6 = vget_high_s16(vreinterpretq_s16_u16(vmovl_u8(t2)));
src += 7;
do {
load_u8_8x4(src, src_stride, &t0, &t1, &t2, &t3);
transpose_elems_inplace_u8_8x4(&t0, &t1, &t2, &t3);
int16x4_t s7 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t0)));
int16x4_t s8 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t1)));
int16x4_t s9 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t2)));
int16x4_t s10 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t3)));
int16x4_t d0 = convolve8_4(s0, s1, s2, s3, s4, s5, s6, s7, filter);
int16x4_t d1 = convolve8_4(s1, s2, s3, s4, s5, s6, s7, s8, filter);
int16x4_t d2 = convolve8_4(s2, s3, s4, s5, s6, s7, s8, s9, filter);
int16x4_t d3 = convolve8_4(s3, s4, s5, s6, s7, s8, s9, s10, filter);
// We halved the filter values so -1 from right shift.
uint8x8_t d01 = vqrshrun_n_s16(vcombine_s16(d0, d1), FILTER_BITS - 1);
uint8x8_t d23 = vqrshrun_n_s16(vcombine_s16(d2, d3), FILTER_BITS - 1);
transpose_elems_inplace_u8_4x4(&d01, &d23);
store_u8x4_strided_x2(dst + 0 * dst_stride, 2 * dst_stride, d01);
store_u8x4_strided_x2(dst + 1 * dst_stride, 2 * dst_stride, d23);
s0 = s4;
s1 = s5;
s2 = s6;
s3 = s7;
s4 = s8;
s5 = s9;
s6 = s10;
src += 4;
dst += 4;
w -= 4;
} while (w != 0);
} else {
if (w == 4) {
do {
uint8x8_t t0, t1, t2, t3, t4, t5, t6, t7;
load_u8_8x8(src, src_stride, &t0, &t1, &t2, &t3, &t4, &t5, &t6, &t7);
transpose_elems_inplace_u8_8x8(&t0, &t1, &t2, &t3, &t4, &t5, &t6, &t7);
int16x8_t s0 = vreinterpretq_s16_u16(vmovl_u8(t0));
int16x8_t s1 = vreinterpretq_s16_u16(vmovl_u8(t1));
int16x8_t s2 = vreinterpretq_s16_u16(vmovl_u8(t2));
int16x8_t s3 = vreinterpretq_s16_u16(vmovl_u8(t3));
int16x8_t s4 = vreinterpretq_s16_u16(vmovl_u8(t4));
int16x8_t s5 = vreinterpretq_s16_u16(vmovl_u8(t5));
int16x8_t s6 = vreinterpretq_s16_u16(vmovl_u8(t6));
load_u8_8x8(src + 7, src_stride, &t0, &t1, &t2, &t3, &t4, &t5, &t6,
&t7);
transpose_elems_u8_4x8(t0, t1, t2, t3, t4, t5, t6, t7, &t0, &t1, &t2,
&t3);
int16x8_t s7 = vreinterpretq_s16_u16(vmovl_u8(t0));
int16x8_t s8 = vreinterpretq_s16_u16(vmovl_u8(t1));
int16x8_t s9 = vreinterpretq_s16_u16(vmovl_u8(t2));
int16x8_t s10 = vreinterpretq_s16_u16(vmovl_u8(t3));
uint8x8_t d0 = convolve8_8(s0, s1, s2, s3, s4, s5, s6, s7, filter);
uint8x8_t d1 = convolve8_8(s1, s2, s3, s4, s5, s6, s7, s8, filter);
uint8x8_t d2 = convolve8_8(s2, s3, s4, s5, s6, s7, s8, s9, filter);
uint8x8_t d3 = convolve8_8(s3, s4, s5, s6, s7, s8, s9, s10, filter);
transpose_elems_inplace_u8_8x4(&d0, &d1, &d2, &d3);
store_u8x4_strided_x2(dst + 0 * dst_stride, 4 * dst_stride, d0);
store_u8x4_strided_x2(dst + 1 * dst_stride, 4 * dst_stride, d1);
store_u8x4_strided_x2(dst + 2 * dst_stride, 4 * dst_stride, d2);
store_u8x4_strided_x2(dst + 3 * dst_stride, 4 * dst_stride, d3);
src += 8 * src_stride;
dst += 8 * dst_stride;
h -= 8;
} while (h > 0);
} else {
do {
int width = w;
const uint8_t *s = src;
uint8_t *d = dst;
uint8x8_t t0, t1, t2, t3, t4, t5, t6, t7;
load_u8_8x8(s, src_stride, &t0, &t1, &t2, &t3, &t4, &t5, &t6, &t7);
transpose_elems_inplace_u8_8x8(&t0, &t1, &t2, &t3, &t4, &t5, &t6, &t7);
int16x8_t s0 = vreinterpretq_s16_u16(vmovl_u8(t0));
int16x8_t s1 = vreinterpretq_s16_u16(vmovl_u8(t1));
int16x8_t s2 = vreinterpretq_s16_u16(vmovl_u8(t2));
int16x8_t s3 = vreinterpretq_s16_u16(vmovl_u8(t3));
int16x8_t s4 = vreinterpretq_s16_u16(vmovl_u8(t4));
int16x8_t s5 = vreinterpretq_s16_u16(vmovl_u8(t5));
int16x8_t s6 = vreinterpretq_s16_u16(vmovl_u8(t6));
s += 7;
do {
load_u8_8x8(s, src_stride, &t0, &t1, &t2, &t3, &t4, &t5, &t6, &t7);
transpose_elems_inplace_u8_8x8(&t0, &t1, &t2, &t3, &t4, &t5, &t6,
&t7);
int16x8_t s7 = vreinterpretq_s16_u16(vmovl_u8(t0));
int16x8_t s8 = vreinterpretq_s16_u16(vmovl_u8(t1));
int16x8_t s9 = vreinterpretq_s16_u16(vmovl_u8(t2));
int16x8_t s10 = vreinterpretq_s16_u16(vmovl_u8(t3));
int16x8_t s11 = vreinterpretq_s16_u16(vmovl_u8(t4));
int16x8_t s12 = vreinterpretq_s16_u16(vmovl_u8(t5));
int16x8_t s13 = vreinterpretq_s16_u16(vmovl_u8(t6));
int16x8_t s14 = vreinterpretq_s16_u16(vmovl_u8(t7));
uint8x8_t d0 = convolve8_8(s0, s1, s2, s3, s4, s5, s6, s7, filter);
uint8x8_t d1 = convolve8_8(s1, s2, s3, s4, s5, s6, s7, s8, filter);
uint8x8_t d2 = convolve8_8(s2, s3, s4, s5, s6, s7, s8, s9, filter);
uint8x8_t d3 = convolve8_8(s3, s4, s5, s6, s7, s8, s9, s10, filter);
uint8x8_t d4 = convolve8_8(s4, s5, s6, s7, s8, s9, s10, s11, filter);
uint8x8_t d5 = convolve8_8(s5, s6, s7, s8, s9, s10, s11, s12, filter);
uint8x8_t d6 =
convolve8_8(s6, s7, s8, s9, s10, s11, s12, s13, filter);
uint8x8_t d7 =
convolve8_8(s7, s8, s9, s10, s11, s12, s13, s14, filter);
transpose_elems_inplace_u8_8x8(&d0, &d1, &d2, &d3, &d4, &d5, &d6,
&d7);
store_u8_8x8(d, dst_stride, d0, d1, d2, d3, d4, d5, d6, d7);
s0 = s8;
s1 = s9;
s2 = s10;
s3 = s11;
s4 = s12;
s5 = s13;
s6 = s14;
s += 8;
d += 8;
width -= 8;
} while (width != 0);
src += 8 * src_stride;
dst += 8 * dst_stride;
h -= 8;
} while (h > 0);
}
}
}
static inline void convolve8_horiz_4tap_neon(const uint8_t *src,
ptrdiff_t src_stride, uint8_t *dst,
ptrdiff_t dst_stride,
const int16_t *filter_x, int w,
int h) {
// All filter values are even, halve to reduce intermediate precision
// requirements.
const int16x4_t filter = vshr_n_s16(vld1_s16(filter_x + 2), 1);
if (w == 4) {
do {
uint8x8_t t01[4];
t01[0] = load_unaligned_u8(src + 0, (int)src_stride);
t01[1] = load_unaligned_u8(src + 1, (int)src_stride);
t01[2] = load_unaligned_u8(src + 2, (int)src_stride);
t01[3] = load_unaligned_u8(src + 3, (int)src_stride);
int16x8_t s01[4];
s01[0] = vreinterpretq_s16_u16(vmovl_u8(t01[0]));
s01[1] = vreinterpretq_s16_u16(vmovl_u8(t01[1]));
s01[2] = vreinterpretq_s16_u16(vmovl_u8(t01[2]));
s01[3] = vreinterpretq_s16_u16(vmovl_u8(t01[3]));
uint8x8_t d01 = convolve4_8(s01[0], s01[1], s01[2], s01[3], filter);
store_u8x4_strided_x2(dst + 0 * dst_stride, dst_stride, d01);
src += 2 * src_stride;
dst += 2 * dst_stride;
h -= 2;
} while (h > 0);
} else {
do {
int width = w;
const uint8_t *s = src;
uint8_t *d = dst;
do {
uint8x8_t t0[4], t1[4];
load_u8_8x4(s + 0 * src_stride, 1, &t0[0], &t0[1], &t0[2], &t0[3]);
load_u8_8x4(s + 1 * src_stride, 1, &t1[0], &t1[1], &t1[2], &t1[3]);
int16x8_t s0[4], s1[4];
s0[0] = vreinterpretq_s16_u16(vmovl_u8(t0[0]));
s0[1] = vreinterpretq_s16_u16(vmovl_u8(t0[1]));
s0[2] = vreinterpretq_s16_u16(vmovl_u8(t0[2]));
s0[3] = vreinterpretq_s16_u16(vmovl_u8(t0[3]));
s1[0] = vreinterpretq_s16_u16(vmovl_u8(t1[0]));
s1[1] = vreinterpretq_s16_u16(vmovl_u8(t1[1]));
s1[2] = vreinterpretq_s16_u16(vmovl_u8(t1[2]));
s1[3] = vreinterpretq_s16_u16(vmovl_u8(t1[3]));
uint8x8_t d0 = convolve4_8(s0[0], s0[1], s0[2], s0[3], filter);
uint8x8_t d1 = convolve4_8(s1[0], s1[1], s1[2], s1[3], filter);
store_u8_8x2(d, dst_stride, d0, d1);
s += 8;
d += 8;
width -= 8;
} while (width != 0);
src += 2 * src_stride;
dst += 2 * dst_stride;
h -= 2;
} while (h > 0);
}
}
void aom_convolve8_horiz_neon(const uint8_t *src, ptrdiff_t src_stride,
uint8_t *dst, ptrdiff_t dst_stride,
const int16_t *filter_x, int x_step_q4,
const int16_t *filter_y, int y_step_q4, int w,
int h) {
assert((intptr_t)dst % 4 == 0);
assert(dst_stride % 4 == 0);
(void)x_step_q4;
(void)filter_y;
(void)y_step_q4;
src -= ((SUBPEL_TAPS / 2) - 1);
int filter_taps = get_filter_taps_convolve8(filter_x);
if (filter_taps == 2) {
convolve8_horiz_2tap_neon(src + 3, src_stride, dst, dst_stride, filter_x, w,
h);
} else if (filter_taps == 4) {
convolve8_horiz_4tap_neon(src + 2, src_stride, dst, dst_stride, filter_x, w,
h);
} else {
convolve8_horiz_8tap_neon(src, src_stride, dst, dst_stride, filter_x, w, h);
}
}
static inline void convolve8_vert_8tap_neon(const uint8_t *src,
ptrdiff_t src_stride, uint8_t *dst,
ptrdiff_t dst_stride,
const int16_t *filter_y, int w,
int h) {
// All filter values are even so halve them to reduce intermediate precision
// requirements.
const int16x8_t filter = vshrq_n_s16(vld1q_s16(filter_y), 1);
if (w == 4) {
uint8x8_t t0, t1, t2, t3, t4, t5, t6;
load_u8_8x7(src, src_stride, &t0, &t1, &t2, &t3, &t4, &t5, &t6);
int16x4_t s0 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t0)));
int16x4_t s1 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t1)));
int16x4_t s2 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t2)));
int16x4_t s3 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t3)));
int16x4_t s4 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t4)));
int16x4_t s5 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t5)));
int16x4_t s6 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t6)));
src += 7 * src_stride;
do {
load_u8_8x4(src, src_stride, &t0, &t1, &t2, &t3);
int16x4_t s7 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t0)));
int16x4_t s8 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t1)));
int16x4_t s9 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t2)));
int16x4_t s10 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t3)));
int16x4_t d0 = convolve8_4(s0, s1, s2, s3, s4, s5, s6, s7, filter);
int16x4_t d1 = convolve8_4(s1, s2, s3, s4, s5, s6, s7, s8, filter);
int16x4_t d2 = convolve8_4(s2, s3, s4, s5, s6, s7, s8, s9, filter);
int16x4_t d3 = convolve8_4(s3, s4, s5, s6, s7, s8, s9, s10, filter);
// We halved the filter values so -1 from right shift.
uint8x8_t d01 = vqrshrun_n_s16(vcombine_s16(d0, d1), FILTER_BITS - 1);
uint8x8_t d23 = vqrshrun_n_s16(vcombine_s16(d2, d3), FILTER_BITS - 1);
store_u8x4_strided_x2(dst + 0 * dst_stride, dst_stride, d01);
store_u8x4_strided_x2(dst + 2 * dst_stride, dst_stride, d23);
s0 = s4;
s1 = s5;
s2 = s6;
s3 = s7;
s4 = s8;
s5 = s9;
s6 = s10;
src += 4 * src_stride;
dst += 4 * dst_stride;
h -= 4;
} while (h != 0);
} else {
do {
uint8x8_t t0, t1, t2, t3, t4, t5, t6;
load_u8_8x7(src, src_stride, &t0, &t1, &t2, &t3, &t4, &t5, &t6);
int16x8_t s0 = vreinterpretq_s16_u16(vmovl_u8(t0));
int16x8_t s1 = vreinterpretq_s16_u16(vmovl_u8(t1));
int16x8_t s2 = vreinterpretq_s16_u16(vmovl_u8(t2));
int16x8_t s3 = vreinterpretq_s16_u16(vmovl_u8(t3));
int16x8_t s4 = vreinterpretq_s16_u16(vmovl_u8(t4));
int16x8_t s5 = vreinterpretq_s16_u16(vmovl_u8(t5));
int16x8_t s6 = vreinterpretq_s16_u16(vmovl_u8(t6));
int height = h;
const uint8_t *s = src + 7 * src_stride;
uint8_t *d = dst;
do {
load_u8_8x4(s, src_stride, &t0, &t1, &t2, &t3);
int16x8_t s7 = vreinterpretq_s16_u16(vmovl_u8(t0));
int16x8_t s8 = vreinterpretq_s16_u16(vmovl_u8(t1));
int16x8_t s9 = vreinterpretq_s16_u16(vmovl_u8(t2));
int16x8_t s10 = vreinterpretq_s16_u16(vmovl_u8(t3));
uint8x8_t d0 = convolve8_8(s0, s1, s2, s3, s4, s5, s6, s7, filter);
uint8x8_t d1 = convolve8_8(s1, s2, s3, s4, s5, s6, s7, s8, filter);
uint8x8_t d2 = convolve8_8(s2, s3, s4, s5, s6, s7, s8, s9, filter);
uint8x8_t d3 = convolve8_8(s3, s4, s5, s6, s7, s8, s9, s10, filter);
store_u8_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 += 8;
dst += 8;
w -= 8;
} while (w != 0);
}
}
void aom_convolve8_vert_neon(const uint8_t *src, ptrdiff_t src_stride,
uint8_t *dst, ptrdiff_t dst_stride,
const int16_t *filter_x, int x_step_q4,
const int16_t *filter_y, int y_step_q4, int w,
int h) {
assert((intptr_t)dst % 4 == 0);
assert(dst_stride % 4 == 0);
(void)filter_x;
(void)x_step_q4;
(void)y_step_q4;
src -= ((SUBPEL_TAPS / 2) - 1) * src_stride;
int filter_taps = get_filter_taps_convolve8(filter_y);
if (filter_taps == 2) {
convolve8_vert_2tap_neon(src + 3 * src_stride, src_stride, dst, dst_stride,
filter_y, w, h);
} else if (filter_taps == 4) {
convolve8_vert_4tap_neon(src + 2 * src_stride, src_stride, dst, dst_stride,
filter_y, w, h);
} else {
convolve8_vert_8tap_neon(src, src_stride, dst, dst_stride, filter_y, w, h);
}
}