ref: 3cf5c213f1dcca17c8d3e8f62fd3dbf0cba1a808
dir: /vpx_dsp/arm/highbd_vpx_convolve_avg_neon.c/
/*
* Copyright (c) 2016 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include <arm_neon.h>
#include "./vpx_dsp_rtcd.h"
#include "vpx/vpx_integer.h"
void vpx_highbd_convolve_avg_neon(const uint8_t *src8, ptrdiff_t src_stride,
uint8_t *dst8, ptrdiff_t dst_stride,
const int16_t *filter_x, int filter_x_stride,
const int16_t *filter_y, int filter_y_stride,
int w, int h, int bd) {
const uint16_t *src = CONVERT_TO_SHORTPTR(src8);
uint16_t *dst = CONVERT_TO_SHORTPTR(dst8);
(void)filter_x;
(void)filter_x_stride;
(void)filter_y;
(void)filter_y_stride;
(void)bd;
if (w < 8) { // avg4
uint16x4_t s0, s1, d0, d1;
uint16x8_t s01, d01;
do {
s0 = vld1_u16(src);
d0 = vld1_u16(dst);
src += src_stride;
s1 = vld1_u16(src);
d1 = vld1_u16(dst + dst_stride);
src += src_stride;
s01 = vcombine_u16(s0, s1);
d01 = vcombine_u16(d0, d1);
d01 = vrhaddq_u16(s01, d01);
vst1_u16(dst, vget_low_u16(d01));
dst += dst_stride;
vst1_u16(dst, vget_high_u16(d01));
dst += dst_stride;
h -= 2;
} while (h > 0);
} else if (w == 8) { // avg8
uint16x8_t s0, s1, d0, d1;
do {
s0 = vld1q_u16(src);
d0 = vld1q_u16(dst);
src += src_stride;
s1 = vld1q_u16(src);
d1 = vld1q_u16(dst + dst_stride);
src += src_stride;
d0 = vrhaddq_u16(s0, d0);
d1 = vrhaddq_u16(s1, d1);
vst1q_u16(dst, d0);
dst += dst_stride;
vst1q_u16(dst, d1);
dst += dst_stride;
h -= 2;
} while (h > 0);
} else if (w < 32) { // avg16
uint16x8_t s0l, s0h, s1l, s1h, d0l, d0h, d1l, d1h;
do {
s0l = vld1q_u16(src);
s0h = vld1q_u16(src + 8);
d0l = vld1q_u16(dst);
d0h = vld1q_u16(dst + 8);
src += src_stride;
s1l = vld1q_u16(src);
s1h = vld1q_u16(src + 8);
d1l = vld1q_u16(dst + dst_stride);
d1h = vld1q_u16(dst + dst_stride + 8);
src += src_stride;
d0l = vrhaddq_u16(s0l, d0l);
d0h = vrhaddq_u16(s0h, d0h);
d1l = vrhaddq_u16(s1l, d1l);
d1h = vrhaddq_u16(s1h, d1h);
vst1q_u16(dst, d0l);
vst1q_u16(dst + 8, d0h);
dst += dst_stride;
vst1q_u16(dst, d1l);
vst1q_u16(dst + 8, d1h);
dst += dst_stride;
h -= 2;
} while (h > 0);
} else if (w == 32) { // avg32
uint16x8_t s0, s1, s2, s3, d0, d1, d2, d3;
do {
s0 = vld1q_u16(src);
s1 = vld1q_u16(src + 8);
s2 = vld1q_u16(src + 16);
s3 = vld1q_u16(src + 24);
d0 = vld1q_u16(dst);
d1 = vld1q_u16(dst + 8);
d2 = vld1q_u16(dst + 16);
d3 = vld1q_u16(dst + 24);
src += src_stride;
d0 = vrhaddq_u16(s0, d0);
d1 = vrhaddq_u16(s1, d1);
d2 = vrhaddq_u16(s2, d2);
d3 = vrhaddq_u16(s3, d3);
vst1q_u16(dst, d0);
vst1q_u16(dst + 8, d1);
vst1q_u16(dst + 16, d2);
vst1q_u16(dst + 24, d3);
dst += dst_stride;
s0 = vld1q_u16(src);
s1 = vld1q_u16(src + 8);
s2 = vld1q_u16(src + 16);
s3 = vld1q_u16(src + 24);
d0 = vld1q_u16(dst);
d1 = vld1q_u16(dst + 8);
d2 = vld1q_u16(dst + 16);
d3 = vld1q_u16(dst + 24);
src += src_stride;
d0 = vrhaddq_u16(s0, d0);
d1 = vrhaddq_u16(s1, d1);
d2 = vrhaddq_u16(s2, d2);
d3 = vrhaddq_u16(s3, d3);
vst1q_u16(dst, d0);
vst1q_u16(dst + 8, d1);
vst1q_u16(dst + 16, d2);
vst1q_u16(dst + 24, d3);
dst += dst_stride;
h -= 2;
} while (h > 0);
} else { // avg64
uint16x8_t s0, s1, s2, s3, d0, d1, d2, d3;
do {
s0 = vld1q_u16(src);
s1 = vld1q_u16(src + 8);
s2 = vld1q_u16(src + 16);
s3 = vld1q_u16(src + 24);
d0 = vld1q_u16(dst);
d1 = vld1q_u16(dst + 8);
d2 = vld1q_u16(dst + 16);
d3 = vld1q_u16(dst + 24);
d0 = vrhaddq_u16(s0, d0);
d1 = vrhaddq_u16(s1, d1);
d2 = vrhaddq_u16(s2, d2);
d3 = vrhaddq_u16(s3, d3);
vst1q_u16(dst, d0);
vst1q_u16(dst + 8, d1);
vst1q_u16(dst + 16, d2);
vst1q_u16(dst + 24, d3);
s0 = vld1q_u16(src + 32);
s1 = vld1q_u16(src + 40);
s2 = vld1q_u16(src + 48);
s3 = vld1q_u16(src + 56);
d0 = vld1q_u16(dst + 32);
d1 = vld1q_u16(dst + 40);
d2 = vld1q_u16(dst + 48);
d3 = vld1q_u16(dst + 56);
d0 = vrhaddq_u16(s0, d0);
d1 = vrhaddq_u16(s1, d1);
d2 = vrhaddq_u16(s2, d2);
d3 = vrhaddq_u16(s3, d3);
vst1q_u16(dst + 32, d0);
vst1q_u16(dst + 40, d1);
vst1q_u16(dst + 48, d2);
vst1q_u16(dst + 56, d3);
src += src_stride;
dst += dst_stride;
} while (--h);
}
}