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1 /* | 1 /* |
2 * Copyright 2014 The Android Open Source Project | 2 * Copyright 2014 The Android Open Source Project |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef SkColor_opts_SSE2_DEFINED | 8 #ifndef SkColor_opts_SSE2_DEFINED |
9 #define SkColor_opts_SSE2_DEFINED | 9 #define SkColor_opts_SSE2_DEFINED |
10 | 10 |
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35 static inline __m128i SkAlphaMulAlpha_SSE2(const __m128i& a, | 35 static inline __m128i SkAlphaMulAlpha_SSE2(const __m128i& a, |
36 const __m128i& b) { | 36 const __m128i& b) { |
37 __m128i prod = _mm_mullo_epi16(a, b); | 37 __m128i prod = _mm_mullo_epi16(a, b); |
38 prod = _mm_add_epi32(prod, _mm_set1_epi32(128)); | 38 prod = _mm_add_epi32(prod, _mm_set1_epi32(128)); |
39 prod = _mm_add_epi32(prod, _mm_srli_epi32(prod, 8)); | 39 prod = _mm_add_epi32(prod, _mm_srli_epi32(prod, 8)); |
40 prod = _mm_srli_epi32(prod, 8); | 40 prod = _mm_srli_epi32(prod, 8); |
41 | 41 |
42 return prod; | 42 return prod; |
43 } | 43 } |
44 | 44 |
45 static const __m128i rb_mask = _mm_set1_epi32(0x00FF00FF); | |
46 static const __m128i ag_mask = _mm_set1_epi32(0xFF00FF00); | |
47 | |
48 // Portable version SkAlphaMulQ is in SkColorPriv.h. | 45 // Portable version SkAlphaMulQ is in SkColorPriv.h. |
49 static inline __m128i SkAlphaMulQ_SSE2(const __m128i& c, const __m128i& scale) { | 46 static inline __m128i SkAlphaMulQ_SSE2(const __m128i& c, const __m128i& scale) { |
| 47 const __m128i mask = _mm_set1_epi32(0xFF00FF); |
50 __m128i s = _mm_or_si128(_mm_slli_epi32(scale, 16), scale); | 48 __m128i s = _mm_or_si128(_mm_slli_epi32(scale, 16), scale); |
51 | 49 |
52 // uint32_t rb = ((c & mask) * scale) >> 8 | 50 // uint32_t rb = ((c & mask) * scale) >> 8 |
53 __m128i rb = _mm_and_si128(rb_mask, c); | 51 __m128i rb = _mm_and_si128(mask, c); |
54 rb = _mm_mullo_epi16(rb, s); | 52 rb = _mm_mullo_epi16(rb, s); |
55 rb = _mm_srli_epi16(rb, 8); | 53 rb = _mm_srli_epi16(rb, 8); |
56 | 54 |
57 // uint32_t ag = ((c >> 8) & mask) * scale | 55 // uint32_t ag = ((c >> 8) & mask) * scale |
58 __m128i ag = _mm_srli_epi16(c, 8); | 56 __m128i ag = _mm_srli_epi16(c, 8); |
59 ASSERT_EQ(ag, _mm_and_si128(rb_mask, ag)); // ag = _mm_srli_epi16(c, 8) did
this for us. | 57 ASSERT_EQ(ag, _mm_and_si128(mask, ag)); // ag = _mm_srli_epi16(c, 8) did th
is for us. |
60 ag = _mm_mullo_epi16(ag, s); | 58 ag = _mm_mullo_epi16(ag, s); |
61 | 59 |
62 // (rb & mask) | (ag & ~mask) | 60 // (rb & mask) | (ag & ~mask) |
63 ASSERT_EQ(rb, _mm_and_si128(rb_mask, rb)); // rb = _mm_srli_epi16(rb, 8) di
d this for us. | 61 ASSERT_EQ(rb, _mm_and_si128(mask, rb)); // rb = _mm_srli_epi16(rb, 8) did t
his for us. |
64 ag = _mm_and_si128(ag_mask, ag); | 62 ag = _mm_andnot_si128(mask, ag); |
65 return _mm_or_si128(rb, ag); | 63 return _mm_or_si128(rb, ag); |
66 } | 64 } |
67 | 65 |
68 // Fast path for SkAlphaMulQ_SSE2 with a constant scale factor. | 66 // Fast path for SkAlphaMulQ_SSE2 with a constant scale factor. |
69 static inline __m128i SkAlphaMulQ_SSE2(const __m128i& c, const unsigned scale) { | 67 static inline __m128i SkAlphaMulQ_SSE2(const __m128i& c, const unsigned scale) { |
| 68 const __m128i mask = _mm_set1_epi32(0xFF00FF); |
70 __m128i s = _mm_set1_epi16(scale << 8); // Move scale factor to upper byte o
f word. | 69 __m128i s = _mm_set1_epi16(scale << 8); // Move scale factor to upper byte o
f word. |
71 | 70 |
72 // With mulhi, red and blue values are already in the right place and | 71 // With mulhi, red and blue values are already in the right place and |
73 // don't need to be divided by 256. | 72 // don't need to be divided by 256. |
74 __m128i rb = _mm_and_si128(rb_mask, c); | 73 __m128i rb = _mm_and_si128(mask, c); |
75 rb = _mm_mulhi_epu16(rb, s); | 74 rb = _mm_mulhi_epu16(rb, s); |
76 | 75 |
77 __m128i ag = _mm_and_si128(ag_mask, c); | 76 __m128i ag = _mm_andnot_si128(mask, c); |
78 ag = _mm_mulhi_epu16(ag, s); // Alpha and green values are in the higher
byte of each word. | 77 ag = _mm_mulhi_epu16(ag, s); // Alpha and green values are in the higher
byte of each word. |
79 ag = _mm_and_si128(ag_mask, ag); | 78 ag = _mm_andnot_si128(mask, ag); |
80 | 79 |
81 return _mm_or_si128(rb, ag); | 80 return _mm_or_si128(rb, ag); |
82 } | 81 } |
83 | 82 |
84 static inline __m128i SkGetPackedA32_SSE2(const __m128i& src) { | 83 static inline __m128i SkGetPackedA32_SSE2(const __m128i& src) { |
85 __m128i a = _mm_slli_epi32(src, (24 - SK_A32_SHIFT)); | 84 __m128i a = _mm_slli_epi32(src, (24 - SK_A32_SHIFT)); |
86 return _mm_srli_epi32(a, 24); | 85 return _mm_srli_epi32(a, 24); |
87 } | 86 } |
88 | 87 |
89 static inline __m128i SkGetPackedR32_SSE2(const __m128i& src) { | 88 static inline __m128i SkGetPackedR32_SSE2(const __m128i& src) { |
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227 dst_scale = _mm_mullo_epi16(dst_scale, src_scale); | 226 dst_scale = _mm_mullo_epi16(dst_scale, src_scale); |
228 dst_scale = _mm_srli_epi16(dst_scale, 8); | 227 dst_scale = _mm_srli_epi16(dst_scale, 8); |
229 dst_scale = _mm_sub_epi32(_mm_set1_epi32(256), dst_scale); | 228 dst_scale = _mm_sub_epi32(_mm_set1_epi32(256), dst_scale); |
230 | 229 |
231 __m128i result = SkAlphaMulQ_SSE2(src, alpha); | 230 __m128i result = SkAlphaMulQ_SSE2(src, alpha); |
232 return _mm_add_epi8(result, SkAlphaMulQ_SSE2(dst, dst_scale)); | 231 return _mm_add_epi8(result, SkAlphaMulQ_SSE2(dst, dst_scale)); |
233 } | 232 } |
234 | 233 |
235 #undef ASSERT_EQ | 234 #undef ASSERT_EQ |
236 #endif // SkColor_opts_SSE2_DEFINED | 235 #endif // SkColor_opts_SSE2_DEFINED |
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