2 * Copyright 2014 The Android Open Source Project
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
8 #ifndef SkColor_opts_SSE2_DEFINED
9 #define SkColor_opts_SSE2_DEFINED
11 #include <emmintrin.h>
13 // Because no _mm_mul_epi32() in SSE2, we emulate it here.
14 // Multiplies 4 32-bit integers from a by 4 32-bit intergers from b.
15 // The 4 multiplication results should be represented within 32-bit
16 // integers, otherwise they would be overflow.
17 static inline __m128i Multiply32_SSE2(const __m128i& a, const __m128i& b) {
18 // Calculate results of a0 * b0 and a2 * b2.
19 __m128i r1 = _mm_mul_epu32(a, b);
20 // Calculate results of a1 * b1 and a3 * b3.
21 __m128i r2 = _mm_mul_epu32(_mm_srli_si128(a, 4), _mm_srli_si128(b, 4));
22 // Shuffle results to [63..0] and interleave the results.
23 __m128i r = _mm_unpacklo_epi32(_mm_shuffle_epi32(r1, _MM_SHUFFLE(0,0,2,0)),
24 _mm_shuffle_epi32(r2, _MM_SHUFFLE(0,0,2,0)));
28 static inline __m128i SkAlpha255To256_SSE2(const __m128i& alpha) {
29 return _mm_add_epi32(alpha, _mm_set1_epi32(1));
32 // See #define SkAlphaMulAlpha(a, b) SkMulDiv255Round(a, b) in SkXfermode.cpp.
33 static inline __m128i SkAlphaMulAlpha_SSE2(const __m128i& a,
35 __m128i prod = _mm_mullo_epi16(a, b);
36 prod = _mm_add_epi32(prod, _mm_set1_epi32(128));
37 prod = _mm_add_epi32(prod, _mm_srli_epi32(prod, 8));
38 prod = _mm_srli_epi32(prod, 8);
43 // Portable version SkAlphaMulQ is in SkColorPriv.h.
44 static inline __m128i SkAlphaMulQ_SSE2(const __m128i& c, const __m128i& scale) {
45 __m128i mask = _mm_set1_epi32(gMask_00FF00FF);
46 __m128i s = _mm_or_si128(_mm_slli_epi32(scale, 16), scale);
48 // uint32_t rb = ((c & mask) * scale) >> 8
49 __m128i rb = _mm_and_si128(mask, c);
50 rb = _mm_mullo_epi16(rb, s);
51 rb = _mm_srli_epi16(rb, 8);
53 // uint32_t ag = ((c >> 8) & mask) * scale
54 __m128i ag = _mm_srli_epi16(c, 8);
55 ag = _mm_and_si128(ag, mask);
56 ag = _mm_mullo_epi16(ag, s);
58 // (rb & mask) | (ag & ~mask)
59 rb = _mm_and_si128(mask, rb);
60 ag = _mm_andnot_si128(mask, ag);
61 return _mm_or_si128(rb, ag);
64 static inline __m128i SkGetPackedA32_SSE2(const __m128i& src) {
65 __m128i a = _mm_slli_epi32(src, (24 - SK_A32_SHIFT));
66 return _mm_srli_epi32(a, 24);
69 static inline __m128i SkGetPackedR32_SSE2(const __m128i& src) {
70 __m128i r = _mm_slli_epi32(src, (24 - SK_R32_SHIFT));
71 return _mm_srli_epi32(r, 24);
74 static inline __m128i SkGetPackedG32_SSE2(const __m128i& src) {
75 __m128i g = _mm_slli_epi32(src, (24 - SK_G32_SHIFT));
76 return _mm_srli_epi32(g, 24);
79 static inline __m128i SkGetPackedB32_SSE2(const __m128i& src) {
80 __m128i b = _mm_slli_epi32(src, (24 - SK_B32_SHIFT));
81 return _mm_srli_epi32(b, 24);
84 static inline __m128i SkMul16ShiftRound_SSE2(const __m128i& a,
85 const __m128i& b, int shift) {
86 __m128i prod = _mm_mullo_epi16(a, b);
87 prod = _mm_add_epi16(prod, _mm_set1_epi16(1 << (shift - 1)));
88 prod = _mm_add_epi16(prod, _mm_srli_epi16(prod, shift));
89 prod = _mm_srli_epi16(prod, shift);
94 static inline __m128i SkPackRGB16_SSE2(const __m128i& r,
95 const __m128i& g, const __m128i& b) {
96 __m128i dr = _mm_slli_epi16(r, SK_R16_SHIFT);
97 __m128i dg = _mm_slli_epi16(g, SK_G16_SHIFT);
98 __m128i db = _mm_slli_epi16(b, SK_B16_SHIFT);
100 __m128i c = _mm_or_si128(dr, dg);
101 return _mm_or_si128(c, db);
104 static inline __m128i SkPackARGB32_SSE2(const __m128i& a, const __m128i& r,
105 const __m128i& g, const __m128i& b) {
106 __m128i da = _mm_slli_epi32(a, SK_A32_SHIFT);
107 __m128i dr = _mm_slli_epi32(r, SK_R32_SHIFT);
108 __m128i dg = _mm_slli_epi32(g, SK_G32_SHIFT);
109 __m128i db = _mm_slli_epi32(b, SK_B32_SHIFT);
111 __m128i c = _mm_or_si128(da, dr);
112 c = _mm_or_si128(c, dg);
113 return _mm_or_si128(c, db);
116 static inline __m128i SkPacked16ToR32_SSE2(const __m128i& src) {
117 __m128i r = _mm_srli_epi32(src, SK_R16_SHIFT);
118 r = _mm_and_si128(r, _mm_set1_epi32(SK_R16_MASK));
119 r = _mm_or_si128(_mm_slli_epi32(r, (8 - SK_R16_BITS)),
120 _mm_srli_epi32(r, (2 * SK_R16_BITS - 8)));
125 static inline __m128i SkPacked16ToG32_SSE2(const __m128i& src) {
126 __m128i g = _mm_srli_epi32(src, SK_G16_SHIFT);
127 g = _mm_and_si128(g, _mm_set1_epi32(SK_G16_MASK));
128 g = _mm_or_si128(_mm_slli_epi32(g, (8 - SK_G16_BITS)),
129 _mm_srli_epi32(g, (2 * SK_G16_BITS - 8)));
134 static inline __m128i SkPacked16ToB32_SSE2(const __m128i& src) {
135 __m128i b = _mm_srli_epi32(src, SK_B16_SHIFT);
136 b = _mm_and_si128(b, _mm_set1_epi32(SK_B16_MASK));
137 b = _mm_or_si128(_mm_slli_epi32(b, (8 - SK_B16_BITS)),
138 _mm_srli_epi32(b, (2 * SK_B16_BITS - 8)));
143 static inline __m128i SkPixel16ToPixel32_SSE2(const __m128i& src) {
144 __m128i r = SkPacked16ToR32_SSE2(src);
145 __m128i g = SkPacked16ToG32_SSE2(src);
146 __m128i b = SkPacked16ToB32_SSE2(src);
148 return SkPackARGB32_SSE2(_mm_set1_epi32(0xFF), r, g, b);
151 static inline __m128i SkPixel32ToPixel16_ToU16_SSE2(const __m128i& src_pixel1,
152 const __m128i& src_pixel2) {
153 // Calculate result r.
154 __m128i r1 = _mm_srli_epi32(src_pixel1,
155 SK_R32_SHIFT + (8 - SK_R16_BITS));
156 r1 = _mm_and_si128(r1, _mm_set1_epi32(SK_R16_MASK));
157 __m128i r2 = _mm_srli_epi32(src_pixel2,
158 SK_R32_SHIFT + (8 - SK_R16_BITS));
159 r2 = _mm_and_si128(r2, _mm_set1_epi32(SK_R16_MASK));
160 __m128i r = _mm_packs_epi32(r1, r2);
162 // Calculate result g.
163 __m128i g1 = _mm_srli_epi32(src_pixel1,
164 SK_G32_SHIFT + (8 - SK_G16_BITS));
165 g1 = _mm_and_si128(g1, _mm_set1_epi32(SK_G16_MASK));
166 __m128i g2 = _mm_srli_epi32(src_pixel2,
167 SK_G32_SHIFT + (8 - SK_G16_BITS));
168 g2 = _mm_and_si128(g2, _mm_set1_epi32(SK_G16_MASK));
169 __m128i g = _mm_packs_epi32(g1, g2);
171 // Calculate result b.
172 __m128i b1 = _mm_srli_epi32(src_pixel1,
173 SK_B32_SHIFT + (8 - SK_B16_BITS));
174 b1 = _mm_and_si128(b1, _mm_set1_epi32(SK_B16_MASK));
175 __m128i b2 = _mm_srli_epi32(src_pixel2,
176 SK_B32_SHIFT + (8 - SK_B16_BITS));
177 b2 = _mm_and_si128(b2, _mm_set1_epi32(SK_B16_MASK));
178 __m128i b = _mm_packs_epi32(b1, b2);
180 // Store 8 16-bit colors in dst.
181 __m128i d_pixel = SkPackRGB16_SSE2(r, g, b);
186 #endif // SkColor_opts_SSE2_DEFINED