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/*
* Copyright (c) 2014 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_convolve_avg_neon(const uint8_t *src, ptrdiff_t src_stride,
uint8_t *dst, ptrdiff_t dst_stride,
const InterpKernel *filter, int x0_q4, int x_step_q4,
int y0_q4, int y_step_q4, int w, int h) {
(void)filter;
(void)x0_q4;
(void)x_step_q4;
(void)y0_q4;
(void)y_step_q4;
if (w < 8) { // avg4
uint8x8_t s0, s1;
uint8x8_t dd0 = vdup_n_u8(0);
uint32x2x2_t s01;
do {
s0 = vld1_u8(src);
src += src_stride;
s1 = vld1_u8(src);
src += src_stride;
s01 = vzip_u32(vreinterpret_u32_u8(s0), vreinterpret_u32_u8(s1));
dd0 = vreinterpret_u8_u32(
vld1_lane_u32((const uint32_t *)dst, vreinterpret_u32_u8(dd0), 0));
dd0 = vreinterpret_u8_u32(vld1_lane_u32(
(const uint32_t *)(dst + dst_stride), vreinterpret_u32_u8(dd0), 1));
dd0 = vrhadd_u8(vreinterpret_u8_u32(s01.val[0]), dd0);
vst1_lane_u32((uint32_t *)dst, vreinterpret_u32_u8(dd0), 0);
dst += dst_stride;
vst1_lane_u32((uint32_t *)dst, vreinterpret_u32_u8(dd0), 1);
dst += dst_stride;
h -= 2;
} while (h != 0);
} else if (w == 8) { // avg8
uint8x8_t s0, s1, d0, d1;
uint8x16_t s01, d01;
do {
s0 = vld1_u8(src);
src += src_stride;
s1 = vld1_u8(src);
src += src_stride;
d0 = vld1_u8(dst);
d1 = vld1_u8(dst + dst_stride);
s01 = vcombine_u8(s0, s1);
d01 = vcombine_u8(d0, d1);
d01 = vrhaddq_u8(s01, d01);
vst1_u8(dst, vget_low_u8(d01));
dst += dst_stride;
vst1_u8(dst, vget_high_u8(d01));
dst += dst_stride;
h -= 2;
} while (h != 0);
} else if (w < 32) { // avg16
uint8x16_t s0, s1, d0, d1;
do {
s0 = vld1q_u8(src);
src += src_stride;
s1 = vld1q_u8(src);
src += src_stride;
d0 = vld1q_u8(dst);
d1 = vld1q_u8(dst + dst_stride);
d0 = vrhaddq_u8(s0, d0);
d1 = vrhaddq_u8(s1, d1);
vst1q_u8(dst, d0);
dst += dst_stride;
vst1q_u8(dst, d1);
dst += dst_stride;
h -= 2;
} while (h != 0);
} else if (w == 32) { // avg32
uint8x16_t s0, s1, s2, s3, d0, d1, d2, d3;
do {
s0 = vld1q_u8(src);
s1 = vld1q_u8(src + 16);
src += src_stride;
s2 = vld1q_u8(src);
s3 = vld1q_u8(src + 16);
src += src_stride;
d0 = vld1q_u8(dst);
d1 = vld1q_u8(dst + 16);
d2 = vld1q_u8(dst + dst_stride);
d3 = vld1q_u8(dst + dst_stride + 16);
d0 = vrhaddq_u8(s0, d0);
d1 = vrhaddq_u8(s1, d1);
d2 = vrhaddq_u8(s2, d2);
d3 = vrhaddq_u8(s3, d3);
vst1q_u8(dst, d0);
vst1q_u8(dst + 16, d1);
dst += dst_stride;
vst1q_u8(dst, d2);
vst1q_u8(dst + 16, d3);
dst += dst_stride;
h -= 2;
} while (h != 0);
} else { // avg64
uint8x16_t s0, s1, s2, s3, d0, d1, d2, d3;
do {
s0 = vld1q_u8(src);
s1 = vld1q_u8(src + 16);
s2 = vld1q_u8(src + 32);
s3 = vld1q_u8(src + 48);
src += src_stride;
d0 = vld1q_u8(dst);
d1 = vld1q_u8(dst + 16);
d2 = vld1q_u8(dst + 32);
d3 = vld1q_u8(dst + 48);
d0 = vrhaddq_u8(s0, d0);
d1 = vrhaddq_u8(s1, d1);
d2 = vrhaddq_u8(s2, d2);
d3 = vrhaddq_u8(s3, d3);
vst1q_u8(dst, d0);
vst1q_u8(dst + 16, d1);
vst1q_u8(dst + 32, d2);
vst1q_u8(dst + 48, d3);
dst += dst_stride;
} while (--h);
}
}
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