1// Copyright 2021 Google Inc. All Rights Reserved.
2//
3// Use of this source code is governed by a BSD-style license
4// that can be found in the COPYING file in the root of the source
5// tree. An additional intellectual property rights grant can be found
6// in the file PATENTS. All contributing project authors may
7// be found in the AUTHORS file in the root of the source tree.
8// -----------------------------------------------------------------------------
9//
10// SSE41 variant of methods for lossless decoder
11
12#include "src/dsp/dsp.h"
13
14#if defined(WEBP_USE_SSE41)
15
16#include "src/dsp/common_sse41.h"
17#include "src/dsp/lossless.h"
18#include "src/dsp/lossless_common.h"
19
20//------------------------------------------------------------------------------
21// Color-space conversion functions
22
23static void TransformColorInverse_SSE41(const VP8LMultipliers* const m,
24 const uint32_t* const src,
25 int num_pixels, uint32_t* dst) {
26// sign-extended multiplying constants, pre-shifted by 5.
27#define CST(X) (((int16_t)(m->X << 8)) >> 5) // sign-extend
28 const __m128i mults_rb =
29 _mm_set1_epi32((int)((uint32_t)CST(green_to_red_) << 16 |
30 (CST(green_to_blue_) & 0xffff)));
31 const __m128i mults_b2 = _mm_set1_epi32(CST(red_to_blue_));
32#undef CST
33 const __m128i mask_ag = _mm_set1_epi32((int)0xff00ff00);
34 const __m128i perm1 = _mm_setr_epi8(-1, 1, -1, 1, -1, 5, -1, 5,
35 -1, 9, -1, 9, -1, 13, -1, 13);
36 const __m128i perm2 = _mm_setr_epi8(-1, 2, -1, -1, -1, 6, -1, -1,
37 -1, 10, -1, -1, -1, 14, -1, -1);
38 int i;
39 for (i = 0; i + 4 <= num_pixels; i += 4) {
40 const __m128i A = _mm_loadu_si128((const __m128i*)(src + i));
41 const __m128i B = _mm_shuffle_epi8(A, perm1); // argb -> g0g0
42 const __m128i C = _mm_mulhi_epi16(B, mults_rb);
43 const __m128i D = _mm_add_epi8(A, C);
44 const __m128i E = _mm_shuffle_epi8(D, perm2);
45 const __m128i F = _mm_mulhi_epi16(E, mults_b2);
46 const __m128i G = _mm_add_epi8(D, F);
47 const __m128i out = _mm_blendv_epi8(G, A, mask_ag);
48 _mm_storeu_si128((__m128i*)&dst[i], out);
49 }
50 // Fall-back to C-version for left-overs.
51 if (i != num_pixels) {
52 VP8LTransformColorInverse_C(m, src + i, num_pixels - i, dst + i);
53 }
54}
55
56//------------------------------------------------------------------------------
57
58#define ARGB_TO_RGB_SSE41 do { \
59 while (num_pixels >= 16) { \
60 const __m128i in0 = _mm_loadu_si128(in + 0); \
61 const __m128i in1 = _mm_loadu_si128(in + 1); \
62 const __m128i in2 = _mm_loadu_si128(in + 2); \
63 const __m128i in3 = _mm_loadu_si128(in + 3); \
64 const __m128i a0 = _mm_shuffle_epi8(in0, perm0); \
65 const __m128i a1 = _mm_shuffle_epi8(in1, perm1); \
66 const __m128i a2 = _mm_shuffle_epi8(in2, perm2); \
67 const __m128i a3 = _mm_shuffle_epi8(in3, perm3); \
68 const __m128i b0 = _mm_blend_epi16(a0, a1, 0xc0); \
69 const __m128i b1 = _mm_blend_epi16(a1, a2, 0xf0); \
70 const __m128i b2 = _mm_blend_epi16(a2, a3, 0xfc); \
71 _mm_storeu_si128(out + 0, b0); \
72 _mm_storeu_si128(out + 1, b1); \
73 _mm_storeu_si128(out + 2, b2); \
74 in += 4; \
75 out += 3; \
76 num_pixels -= 16; \
77 } \
78} while (0)
79
80static void ConvertBGRAToRGB_SSE41(const uint32_t* src, int num_pixels,
81 uint8_t* dst) {
82 const __m128i* in = (const __m128i*)src;
83 __m128i* out = (__m128i*)dst;
84 const __m128i perm0 = _mm_setr_epi8(2, 1, 0, 6, 5, 4, 10, 9,
85 8, 14, 13, 12, -1, -1, -1, -1);
86 const __m128i perm1 = _mm_shuffle_epi32(perm0, 0x39);
87 const __m128i perm2 = _mm_shuffle_epi32(perm0, 0x4e);
88 const __m128i perm3 = _mm_shuffle_epi32(perm0, 0x93);
89
90 ARGB_TO_RGB_SSE41;
91
92 // left-overs
93 if (num_pixels > 0) {
94 VP8LConvertBGRAToRGB_C((const uint32_t*)in, num_pixels, (uint8_t*)out);
95 }
96}
97
98static void ConvertBGRAToBGR_SSE41(const uint32_t* src,
99 int num_pixels, uint8_t* dst) {
100 const __m128i* in = (const __m128i*)src;
101 __m128i* out = (__m128i*)dst;
102 const __m128i perm0 = _mm_setr_epi8(0, 1, 2, 4, 5, 6, 8, 9, 10,
103 12, 13, 14, -1, -1, -1, -1);
104 const __m128i perm1 = _mm_shuffle_epi32(perm0, 0x39);
105 const __m128i perm2 = _mm_shuffle_epi32(perm0, 0x4e);
106 const __m128i perm3 = _mm_shuffle_epi32(perm0, 0x93);
107
108 ARGB_TO_RGB_SSE41;
109
110 // left-overs
111 if (num_pixels > 0) {
112 VP8LConvertBGRAToBGR_C((const uint32_t*)in, num_pixels, (uint8_t*)out);
113 }
114}
115
116#undef ARGB_TO_RGB_SSE41
117
118//------------------------------------------------------------------------------
119// Entry point
120
121extern void VP8LDspInitSSE41(void);
122
123WEBP_TSAN_IGNORE_FUNCTION void VP8LDspInitSSE41(void) {
124 VP8LTransformColorInverse = TransformColorInverse_SSE41;
125 VP8LConvertBGRAToRGB = ConvertBGRAToRGB_SSE41;
126 VP8LConvertBGRAToBGR = ConvertBGRAToBGR_SSE41;
127}
128
129#else // !WEBP_USE_SSE41
130
131WEBP_DSP_INIT_STUB(VP8LDspInitSSE41)
132
133#endif // WEBP_USE_SSE41
134