1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
/*
* Copyright (c) 2016, 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 "config/aom_config.h"
#include "aom/aom_integer.h"
void aom_subtract_block_neon(int rows, int cols, int16_t *diff,
ptrdiff_t diff_stride, const uint8_t *src,
ptrdiff_t src_stride, const uint8_t *pred,
ptrdiff_t pred_stride) {
int r, c;
if (cols > 16) {
for (r = 0; r < rows; ++r) {
for (c = 0; c < cols; c += 32) {
const uint8x16_t v_src_00 = vld1q_u8(&src[c + 0]);
const uint8x16_t v_src_16 = vld1q_u8(&src[c + 16]);
const uint8x16_t v_pred_00 = vld1q_u8(&pred[c + 0]);
const uint8x16_t v_pred_16 = vld1q_u8(&pred[c + 16]);
const uint16x8_t v_diff_lo_00 =
vsubl_u8(vget_low_u8(v_src_00), vget_low_u8(v_pred_00));
const uint16x8_t v_diff_hi_00 =
vsubl_u8(vget_high_u8(v_src_00), vget_high_u8(v_pred_00));
const uint16x8_t v_diff_lo_16 =
vsubl_u8(vget_low_u8(v_src_16), vget_low_u8(v_pred_16));
const uint16x8_t v_diff_hi_16 =
vsubl_u8(vget_high_u8(v_src_16), vget_high_u8(v_pred_16));
vst1q_s16(&diff[c + 0], vreinterpretq_s16_u16(v_diff_lo_00));
vst1q_s16(&diff[c + 8], vreinterpretq_s16_u16(v_diff_hi_00));
vst1q_s16(&diff[c + 16], vreinterpretq_s16_u16(v_diff_lo_16));
vst1q_s16(&diff[c + 24], vreinterpretq_s16_u16(v_diff_hi_16));
}
diff += diff_stride;
pred += pred_stride;
src += src_stride;
}
} else if (cols > 8) {
for (r = 0; r < rows; ++r) {
const uint8x16_t v_src = vld1q_u8(&src[0]);
const uint8x16_t v_pred = vld1q_u8(&pred[0]);
const uint16x8_t v_diff_lo =
vsubl_u8(vget_low_u8(v_src), vget_low_u8(v_pred));
const uint16x8_t v_diff_hi =
vsubl_u8(vget_high_u8(v_src), vget_high_u8(v_pred));
vst1q_s16(&diff[0], vreinterpretq_s16_u16(v_diff_lo));
vst1q_s16(&diff[8], vreinterpretq_s16_u16(v_diff_hi));
diff += diff_stride;
pred += pred_stride;
src += src_stride;
}
} else if (cols > 4) {
for (r = 0; r < rows; ++r) {
const uint8x8_t v_src = vld1_u8(&src[0]);
const uint8x8_t v_pred = vld1_u8(&pred[0]);
const uint16x8_t v_diff = vsubl_u8(v_src, v_pred);
vst1q_s16(&diff[0], vreinterpretq_s16_u16(v_diff));
diff += diff_stride;
pred += pred_stride;
src += src_stride;
}
} else {
for (r = 0; r < rows; ++r) {
for (c = 0; c < cols; ++c) diff[c] = src[c] - pred[c];
diff += diff_stride;
pred += pred_stride;
src += src_stride;
}
}
}
|
