1 /*
2 * Copyright (c) 2018, Alliance for Open Media. All rights reserved.
3 *
4 * This source code is subject to the terms of the BSD 2 Clause License and
5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
6 * was not distributed with this source code in the LICENSE file, you can
7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
8 * Media Patent License 1.0 was not distributed with this source code in the
9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
10 */
11
12 #include <tmmintrin.h>
13
14 #include "config/aom_config.h"
15 #include "config/aom_dsp_rtcd.h"
16
17 #include "aom_dsp/x86/synonyms.h"
18 #include "aom_dsp/x86/variance_impl_ssse3.h"
19
aom_var_filter_block2d_bil_first_pass_ssse3(const uint8_t * a,uint16_t * b,unsigned int src_pixels_per_line,unsigned int pixel_step,unsigned int output_height,unsigned int output_width,const uint8_t * filter)20 void aom_var_filter_block2d_bil_first_pass_ssse3(
21 const uint8_t *a, uint16_t *b, unsigned int src_pixels_per_line,
22 unsigned int pixel_step, unsigned int output_height,
23 unsigned int output_width, const uint8_t *filter) {
24 // Note: filter[0], filter[1] could be {128, 0}, where 128 will overflow
25 // in computation using _mm_maddubs_epi16.
26 // Change {128, 0} to {64, 0} and reduce FILTER_BITS by 1 to avoid overflow.
27 const int16_t round = (1 << (FILTER_BITS - 1)) >> 1;
28 const __m128i r = _mm_set1_epi16(round);
29 const int8_t f0 = (int8_t)(filter[0] >> 1);
30 const int8_t f1 = (int8_t)(filter[1] >> 1);
31 const __m128i filters = _mm_setr_epi8(f0, f1, f0, f1, f0, f1, f0, f1, f0, f1,
32 f0, f1, f0, f1, f0, f1);
33 unsigned int i, j;
34 (void)pixel_step;
35
36 if (output_width >= 8) {
37 for (i = 0; i < output_height; ++i) {
38 for (j = 0; j < output_width; j += 8) {
39 // load source
40 __m128i source_low = xx_loadl_64(a);
41 __m128i source_hi = xx_loadl_64(a + 1);
42
43 // unpack to:
44 // { a[0], a[1], a[1], a[2], a[2], a[3], a[3], a[4],
45 // a[4], a[5], a[5], a[6], a[6], a[7], a[7], a[8] }
46 __m128i source = _mm_unpacklo_epi8(source_low, source_hi);
47
48 // b[i] = a[i] * filter[0] + a[i + 1] * filter[1]
49 __m128i res = _mm_maddubs_epi16(source, filters);
50
51 // round
52 res = _mm_srai_epi16(_mm_add_epi16(res, r), FILTER_BITS - 1);
53
54 xx_storeu_128(b, res);
55
56 a += 8;
57 b += 8;
58 }
59
60 a += src_pixels_per_line - output_width;
61 }
62 } else {
63 const __m128i shuffle_mask =
64 _mm_setr_epi8(0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8);
65 for (i = 0; i < output_height; ++i) {
66 // load source, only first 5 values are meaningful:
67 // { a[0], a[1], a[2], a[3], a[4], xxxx }
68 __m128i source = xx_loadl_64(a);
69
70 // shuffle, up to the first 8 are useful
71 // { a[0], a[1], a[1], a[2], a[2], a[3], a[3], a[4],
72 // a[4], a[5], a[5], a[6], a[6], a[7], a[7], a[8] }
73 __m128i source_shuffle = _mm_shuffle_epi8(source, shuffle_mask);
74
75 __m128i res = _mm_maddubs_epi16(source_shuffle, filters);
76 res = _mm_srai_epi16(_mm_add_epi16(res, r), FILTER_BITS - 1);
77
78 xx_storel_64(b, res);
79
80 a += src_pixels_per_line;
81 b += output_width;
82 }
83 }
84 }
85
aom_var_filter_block2d_bil_second_pass_ssse3(const uint16_t * a,uint8_t * b,unsigned int src_pixels_per_line,unsigned int pixel_step,unsigned int output_height,unsigned int output_width,const uint8_t * filter)86 void aom_var_filter_block2d_bil_second_pass_ssse3(
87 const uint16_t *a, uint8_t *b, unsigned int src_pixels_per_line,
88 unsigned int pixel_step, unsigned int output_height,
89 unsigned int output_width, const uint8_t *filter) {
90 const int16_t round = (1 << FILTER_BITS) >> 1;
91 const __m128i r = _mm_set1_epi32(round);
92 const __m128i filters =
93 _mm_setr_epi16(filter[0], filter[1], filter[0], filter[1], filter[0],
94 filter[1], filter[0], filter[1]);
95 const __m128i shuffle_mask =
96 _mm_setr_epi8(0, 1, 8, 9, 2, 3, 10, 11, 4, 5, 12, 13, 6, 7, 14, 15);
97 const __m128i mask =
98 _mm_setr_epi8(0, 4, 8, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1);
99 unsigned int i, j;
100
101 for (i = 0; i < output_height; ++i) {
102 for (j = 0; j < output_width; j += 4) {
103 // load source as:
104 // { a[0], a[1], a[2], a[3], a[w], a[w+1], a[w+2], a[w+3] }
105 __m128i source1 = xx_loadl_64(a);
106 __m128i source2 = xx_loadl_64(a + pixel_step);
107 __m128i source = _mm_unpacklo_epi64(source1, source2);
108
109 // shuffle source to:
110 // { a[0], a[w], a[1], a[w+1], a[2], a[w+2], a[3], a[w+3] }
111 __m128i source_shuffle = _mm_shuffle_epi8(source, shuffle_mask);
112
113 // b[i] = a[i] * filter[0] + a[w + i] * filter[1]
114 __m128i res = _mm_madd_epi16(source_shuffle, filters);
115
116 // round
117 res = _mm_srai_epi32(_mm_add_epi32(res, r), FILTER_BITS);
118
119 // shuffle to get each lower 8 bit of every 32 bit
120 res = _mm_shuffle_epi8(res, mask);
121
122 xx_storel_32(b, res);
123
124 a += 4;
125 b += 4;
126 }
127
128 a += src_pixels_per_line - output_width;
129 }
130 }
131