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1 /* | 1 /* |
2 * Copyright 2015 Google Inc. | 2 * Copyright 2015 Google Inc. |
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 SK_ALWAYS_INLINE Sk4px Sk4px::DupPMColor(SkPMColor px) { return Sk16b(_mm_set1_e
pi32(px)); } | 8 namespace { // See Sk4px.h |
9 | 9 |
10 SK_ALWAYS_INLINE Sk4px Sk4px::Load4(const SkPMColor px[4]) { | 10 inline Sk4px Sk4px::DupPMColor(SkPMColor px) { return Sk16b(_mm_set1_epi32(px));
} |
| 11 |
| 12 inline Sk4px Sk4px::Load4(const SkPMColor px[4]) { |
11 return Sk16b(_mm_loadu_si128((const __m128i*)px)); | 13 return Sk16b(_mm_loadu_si128((const __m128i*)px)); |
12 } | 14 } |
13 SK_ALWAYS_INLINE Sk4px Sk4px::Load2(const SkPMColor px[2]) { | 15 inline Sk4px Sk4px::Load2(const SkPMColor px[2]) { |
14 return Sk16b(_mm_loadl_epi64((const __m128i*)px)); | 16 return Sk16b(_mm_loadl_epi64((const __m128i*)px)); |
15 } | 17 } |
16 SK_ALWAYS_INLINE Sk4px Sk4px::Load1(const SkPMColor px[1]) { return Sk16b(_mm_cv
tsi32_si128(*px)); } | 18 inline Sk4px Sk4px::Load1(const SkPMColor px[1]) { return Sk16b(_mm_cvtsi32_si12
8(*px)); } |
17 | 19 |
18 SK_ALWAYS_INLINE void Sk4px::store4(SkPMColor px[4]) const { | 20 inline void Sk4px::store4(SkPMColor px[4]) const { _mm_storeu_si128((__m128i*)px
, this->fVec); } |
19 _mm_storeu_si128((__m128i*)px, this->fVec); | 21 inline void Sk4px::store2(SkPMColor px[2]) const { _mm_storel_epi64((__m128i*)px
, this->fVec); } |
20 } | 22 inline void Sk4px::store1(SkPMColor px[1]) const { *px = _mm_cvtsi128_si32(this-
>fVec); } |
21 SK_ALWAYS_INLINE void Sk4px::store2(SkPMColor px[2]) const { | |
22 _mm_storel_epi64((__m128i*)px, this->fVec); | |
23 } | |
24 SK_ALWAYS_INLINE void Sk4px::store1(SkPMColor px[1]) const { | |
25 *px = _mm_cvtsi128_si32(this->fVec); | |
26 } | |
27 | 23 |
28 SK_ALWAYS_INLINE Sk4px::Wide Sk4px::widenLo() const { | 24 inline Sk4px::Wide Sk4px::widenLo() const { |
29 return Sk16h(_mm_unpacklo_epi8(this->fVec, _mm_setzero_si128()), | 25 return Sk16h(_mm_unpacklo_epi8(this->fVec, _mm_setzero_si128()), |
30 _mm_unpackhi_epi8(this->fVec, _mm_setzero_si128())); | 26 _mm_unpackhi_epi8(this->fVec, _mm_setzero_si128())); |
31 } | 27 } |
32 | 28 |
33 SK_ALWAYS_INLINE Sk4px::Wide Sk4px::widenHi() const { | 29 inline Sk4px::Wide Sk4px::widenHi() const { |
34 return Sk16h(_mm_unpacklo_epi8(_mm_setzero_si128(), this->fVec), | 30 return Sk16h(_mm_unpacklo_epi8(_mm_setzero_si128(), this->fVec), |
35 _mm_unpackhi_epi8(_mm_setzero_si128(), this->fVec)); | 31 _mm_unpackhi_epi8(_mm_setzero_si128(), this->fVec)); |
36 } | 32 } |
37 | 33 |
38 SK_ALWAYS_INLINE Sk4px::Wide Sk4px::widenLoHi() const { | 34 inline Sk4px::Wide Sk4px::widenLoHi() const { |
39 return Sk16h(_mm_unpacklo_epi8(this->fVec, this->fVec), | 35 return Sk16h(_mm_unpacklo_epi8(this->fVec, this->fVec), |
40 _mm_unpackhi_epi8(this->fVec, this->fVec)); | 36 _mm_unpackhi_epi8(this->fVec, this->fVec)); |
41 } | 37 } |
42 | 38 |
43 SK_ALWAYS_INLINE Sk4px::Wide Sk4px::mulWiden(const Sk16b& other) const { | 39 inline Sk4px::Wide Sk4px::mulWiden(const Sk16b& other) const { |
44 return this->widenLo() * Sk4px(other).widenLo(); | 40 return this->widenLo() * Sk4px(other).widenLo(); |
45 } | 41 } |
46 | 42 |
47 SK_ALWAYS_INLINE Sk4px Sk4px::Wide::addNarrowHi(const Sk16h& other) const { | 43 inline Sk4px Sk4px::Wide::addNarrowHi(const Sk16h& other) const { |
48 Sk4px::Wide r = (*this + other) >> 8; | 44 Sk4px::Wide r = (*this + other) >> 8; |
49 return Sk4px(_mm_packus_epi16(r.fLo.fVec, r.fHi.fVec)); | 45 return Sk4px(_mm_packus_epi16(r.fLo.fVec, r.fHi.fVec)); |
50 } | 46 } |
51 | 47 |
52 // Load4Alphas and Load2Alphas use possibly-unaligned loads (SkAlpha[] -> uint16
_t or uint32_t). | 48 // Load4Alphas and Load2Alphas use possibly-unaligned loads (SkAlpha[] -> uint16
_t or uint32_t). |
53 // These are safe on x86, often with no speed penalty. | 49 // These are safe on x86, often with no speed penalty. |
54 | 50 |
55 #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3 | 51 #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3 |
56 SK_ALWAYS_INLINE Sk4px Sk4px::alphas() const { | 52 inline Sk4px Sk4px::alphas() const { |
57 static_assert(SK_A32_SHIFT == 24, "Intel's always little-endian."); | 53 static_assert(SK_A32_SHIFT == 24, "Intel's always little-endian."); |
58 __m128i splat = _mm_set_epi8(15,15,15,15, 11,11,11,11, 7,7,7,7, 3,3,3,3)
; | 54 __m128i splat = _mm_set_epi8(15,15,15,15, 11,11,11,11, 7,7,7,7, 3,3,3,3)
; |
59 return Sk16b(_mm_shuffle_epi8(this->fVec, splat)); | 55 return Sk16b(_mm_shuffle_epi8(this->fVec, splat)); |
60 } | 56 } |
61 | 57 |
62 SK_ALWAYS_INLINE Sk4px Sk4px::Load4Alphas(const SkAlpha a[4]) { | 58 inline Sk4px Sk4px::Load4Alphas(const SkAlpha a[4]) { |
63 uint32_t as = *(const uint32_t*)a; | 59 uint32_t as = *(const uint32_t*)a; |
64 __m128i splat = _mm_set_epi8(3,3,3,3, 2,2,2,2, 1,1,1,1, 0,0,0,0); | 60 __m128i splat = _mm_set_epi8(3,3,3,3, 2,2,2,2, 1,1,1,1, 0,0,0,0); |
65 return Sk16b(_mm_shuffle_epi8(_mm_cvtsi32_si128(as), splat)); | 61 return Sk16b(_mm_shuffle_epi8(_mm_cvtsi32_si128(as), splat)); |
66 } | 62 } |
67 #else | 63 #else |
68 SK_ALWAYS_INLINE Sk4px Sk4px::alphas() const { | 64 inline Sk4px Sk4px::alphas() const { |
69 static_assert(SK_A32_SHIFT == 24, "Intel's always little-endian."); | 65 static_assert(SK_A32_SHIFT == 24, "Intel's always little-endian."); |
70 __m128i as = _mm_srli_epi32(this->fVec, 24); // ___3 ___2 ___1 ___0 | 66 __m128i as = _mm_srli_epi32(this->fVec, 24); // ___3 ___2 ___1 ___0 |
71 as = _mm_or_si128(as, _mm_slli_si128(as, 1)); // __33 __22 __11 __00 | 67 as = _mm_or_si128(as, _mm_slli_si128(as, 1)); // __33 __22 __11 __00 |
72 as = _mm_or_si128(as, _mm_slli_si128(as, 2)); // 3333 2222 1111 0000 | 68 as = _mm_or_si128(as, _mm_slli_si128(as, 2)); // 3333 2222 1111 0000 |
73 return Sk16b(as); | 69 return Sk16b(as); |
74 } | 70 } |
75 | 71 |
76 SK_ALWAYS_INLINE Sk4px Sk4px::Load4Alphas(const SkAlpha a[4]) { | 72 inline Sk4px Sk4px::Load4Alphas(const SkAlpha a[4]) { |
77 __m128i as = _mm_cvtsi32_si128(*(const uint32_t*)a); // ____ ____ ____
3210 | 73 __m128i as = _mm_cvtsi32_si128(*(const uint32_t*)a); // ____ ____ ____
3210 |
78 as = _mm_unpacklo_epi8 (as, _mm_setzero_si128()); // ____ ____ _3_2
_1_0 | 74 as = _mm_unpacklo_epi8 (as, _mm_setzero_si128()); // ____ ____ _3_2
_1_0 |
79 as = _mm_unpacklo_epi16(as, _mm_setzero_si128()); // ___3 ___2 ___1
___0 | 75 as = _mm_unpacklo_epi16(as, _mm_setzero_si128()); // ___3 ___2 ___1
___0 |
80 as = _mm_or_si128(as, _mm_slli_si128(as, 1)); // __33 __22 __11
__00 | 76 as = _mm_or_si128(as, _mm_slli_si128(as, 1)); // __33 __22 __11
__00 |
81 as = _mm_or_si128(as, _mm_slli_si128(as, 2)); // 3333 2222 1111
0000 | 77 as = _mm_or_si128(as, _mm_slli_si128(as, 2)); // 3333 2222 1111
0000 |
82 return Sk16b(as); | 78 return Sk16b(as); |
83 } | 79 } |
84 #endif | 80 #endif |
85 | 81 |
86 SK_ALWAYS_INLINE Sk4px Sk4px::Load2Alphas(const SkAlpha a[2]) { | 82 inline Sk4px Sk4px::Load2Alphas(const SkAlpha a[2]) { |
87 uint32_t as = *(const uint16_t*)a; // Aa -> Aa00 | 83 uint32_t as = *(const uint16_t*)a; // Aa -> Aa00 |
88 return Load4Alphas((const SkAlpha*)&as); | 84 return Load4Alphas((const SkAlpha*)&as); |
89 } | 85 } |
90 | 86 |
91 SK_ALWAYS_INLINE Sk4px Sk4px::zeroColors() const { | 87 inline Sk4px Sk4px::zeroColors() const { |
92 return Sk16b(_mm_and_si128(_mm_set1_epi32(0xFF << SK_A32_SHIFT), this->fVec)
); | 88 return Sk16b(_mm_and_si128(_mm_set1_epi32(0xFF << SK_A32_SHIFT), this->fVec)
); |
93 } | 89 } |
94 | 90 |
95 SK_ALWAYS_INLINE Sk4px Sk4px::zeroAlphas() const { | 91 inline Sk4px Sk4px::zeroAlphas() const { |
96 // andnot(a,b) == ~a & b | 92 // andnot(a,b) == ~a & b |
97 return Sk16b(_mm_andnot_si128(_mm_set1_epi32(0xFF << SK_A32_SHIFT), this->fV
ec)); | 93 return Sk16b(_mm_andnot_si128(_mm_set1_epi32(0xFF << SK_A32_SHIFT), this->fV
ec)); |
98 } | 94 } |
99 | 95 |
100 static SK_ALWAYS_INLINE __m128i widen_low_half_to_8888(__m128i v) { | 96 static inline __m128i widen_low_half_to_8888(__m128i v) { |
101 // RGB565 format: |R....|G.....|B....| | 97 // RGB565 format: |R....|G.....|B....| |
102 // Bit: 16 11 5 0 | 98 // Bit: 16 11 5 0 |
103 | 99 |
104 // First get each pixel into its own 32-bit lane. | 100 // First get each pixel into its own 32-bit lane. |
105 // v == ____ ____ ____ ____ rgb3 rgb2 rgb1 rgb0 | 101 // v == ____ ____ ____ ____ rgb3 rgb2 rgb1 rgb0 |
106 // spread == 0000 rgb3 0000 rgb2 0000 rgb1 0000 rgb0 | 102 // spread == 0000 rgb3 0000 rgb2 0000 rgb1 0000 rgb0 |
107 auto spread = _mm_unpacklo_epi16(v, _mm_setzero_si128()); | 103 auto spread = _mm_unpacklo_epi16(v, _mm_setzero_si128()); |
108 | 104 |
109 // Get each color independently, still in 565 precison but down at bit 0. | 105 // Get each color independently, still in 565 precison but down at bit 0. |
110 auto r5 = _mm_srli_epi32(spread, 11), | 106 auto r5 = _mm_srli_epi32(spread, 11), |
111 g6 = _mm_and_si128(_mm_set1_epi32(63), _mm_srli_epi32(spread, 5)), | 107 g6 = _mm_and_si128(_mm_set1_epi32(63), _mm_srli_epi32(spread, 5)), |
112 b5 = _mm_and_si128(_mm_set1_epi32(31), spread); | 108 b5 = _mm_and_si128(_mm_set1_epi32(31), spread); |
113 | 109 |
114 // Scale 565 precision up to 8-bit each, filling low 323 bits with high bits
of each component. | 110 // Scale 565 precision up to 8-bit each, filling low 323 bits with high bits
of each component. |
115 auto r8 = _mm_or_si128(_mm_slli_epi32(r5, 3), _mm_srli_epi32(r5, 2)), | 111 auto r8 = _mm_or_si128(_mm_slli_epi32(r5, 3), _mm_srli_epi32(r5, 2)), |
116 g8 = _mm_or_si128(_mm_slli_epi32(g6, 2), _mm_srli_epi32(g6, 4)), | 112 g8 = _mm_or_si128(_mm_slli_epi32(g6, 2), _mm_srli_epi32(g6, 4)), |
117 b8 = _mm_or_si128(_mm_slli_epi32(b5, 3), _mm_srli_epi32(b5, 2)); | 113 b8 = _mm_or_si128(_mm_slli_epi32(b5, 3), _mm_srli_epi32(b5, 2)); |
118 | 114 |
119 // Now put all the 8-bit components into SkPMColor order. | 115 // Now put all the 8-bit components into SkPMColor order. |
120 return _mm_or_si128(_mm_slli_epi32(r8, SK_R32_SHIFT), // TODO: one of thes
e shifts is zero... | 116 return _mm_or_si128(_mm_slli_epi32(r8, SK_R32_SHIFT), // TODO: one of thes
e shifts is zero... |
121 _mm_or_si128(_mm_slli_epi32(g8, SK_G32_SHIFT), | 117 _mm_or_si128(_mm_slli_epi32(g8, SK_G32_SHIFT), |
122 _mm_or_si128(_mm_slli_epi32(b8, SK_B32_SHIFT), | 118 _mm_or_si128(_mm_slli_epi32(b8, SK_B32_SHIFT), |
123 _mm_set1_epi32(0xFF << SK_A32_SHIFT)))); | 119 _mm_set1_epi32(0xFF << SK_A32_SHIFT)))); |
124 } | 120 } |
125 | 121 |
126 static SK_ALWAYS_INLINE __m128i narrow_to_565(__m128i w) { | 122 static inline __m128i narrow_to_565(__m128i w) { |
127 // Extract out top RGB 565 bits of each pixel, with no rounding. | 123 // Extract out top RGB 565 bits of each pixel, with no rounding. |
128 auto r5 = _mm_and_si128(_mm_set1_epi32(31), _mm_srli_epi32(w, SK_R32_SHIFT +
3)), | 124 auto r5 = _mm_and_si128(_mm_set1_epi32(31), _mm_srli_epi32(w, SK_R32_SHIFT +
3)), |
129 g6 = _mm_and_si128(_mm_set1_epi32(63), _mm_srli_epi32(w, SK_G32_SHIFT +
2)), | 125 g6 = _mm_and_si128(_mm_set1_epi32(63), _mm_srli_epi32(w, SK_G32_SHIFT +
2)), |
130 b5 = _mm_and_si128(_mm_set1_epi32(31), _mm_srli_epi32(w, SK_B32_SHIFT +
3)); | 126 b5 = _mm_and_si128(_mm_set1_epi32(31), _mm_srli_epi32(w, SK_B32_SHIFT +
3)); |
131 | 127 |
132 // Now put the bits in place in the low 16-bits of each 32-bit lane. | 128 // Now put the bits in place in the low 16-bits of each 32-bit lane. |
133 auto spread = _mm_or_si128(_mm_slli_epi32(r5, 11), | 129 auto spread = _mm_or_si128(_mm_slli_epi32(r5, 11), |
134 _mm_or_si128(_mm_slli_epi32(g6, 5), | 130 _mm_or_si128(_mm_slli_epi32(g6, 5), |
135 b5)); | 131 b5)); |
136 | 132 |
137 // We want to pack the bottom 16-bits of spread down into the low half of th
e register, v. | 133 // We want to pack the bottom 16-bits of spread down into the low half of th
e register, v. |
138 // spread == 0000 rgb3 0000 rgb2 0000 rgb1 0000 rgb0 | 134 // spread == 0000 rgb3 0000 rgb2 0000 rgb1 0000 rgb0 |
139 // v == ____ ____ ____ ____ rgb3 rgb2 rgb1 rgb0 | 135 // v == ____ ____ ____ ____ rgb3 rgb2 rgb1 rgb0 |
140 | 136 |
141 // Ideally now we'd use _mm_packus_epi32(spread, <anything>) to pack v. But
that's from SSE4. | 137 // Ideally now we'd use _mm_packus_epi32(spread, <anything>) to pack v. But
that's from SSE4. |
142 // With only SSE2, we need to use _mm_packs_epi32. That does signed saturat
ion, and | 138 // With only SSE2, we need to use _mm_packs_epi32. That does signed saturat
ion, and |
143 // we need to preserve all 16 bits. So we pretend our data is signed by sig
n-extending first. | 139 // we need to preserve all 16 bits. So we pretend our data is signed by sig
n-extending first. |
144 // TODO: is it faster to just _mm_shuffle_epi8 this when we have SSSE3? | 140 // TODO: is it faster to just _mm_shuffle_epi8 this when we have SSSE3? |
145 auto signExtended = _mm_srai_epi32(_mm_slli_epi32(spread, 16), 16); | 141 auto signExtended = _mm_srai_epi32(_mm_slli_epi32(spread, 16), 16); |
146 auto v = _mm_packs_epi32(signExtended, signExtended); | 142 auto v = _mm_packs_epi32(signExtended, signExtended); |
147 return v; | 143 return v; |
148 } | 144 } |
149 | 145 |
150 SK_ALWAYS_INLINE Sk4px Sk4px::Load4(const SkPMColor16 src[4]) { | 146 inline Sk4px Sk4px::Load4(const SkPMColor16 src[4]) { |
151 return Sk16b(widen_low_half_to_8888(_mm_loadl_epi64((const __m128i*)src))); | 147 return Sk16b(widen_low_half_to_8888(_mm_loadl_epi64((const __m128i*)src))); |
152 } | 148 } |
153 SK_ALWAYS_INLINE Sk4px Sk4px::Load2(const SkPMColor16 src[2]) { | 149 inline Sk4px Sk4px::Load2(const SkPMColor16 src[2]) { |
154 auto src2 = ((uint32_t)src[0] ) | 150 auto src2 = ((uint32_t)src[0] ) |
155 | ((uint32_t)src[1] << 16); | 151 | ((uint32_t)src[1] << 16); |
156 return Sk16b(widen_low_half_to_8888(_mm_cvtsi32_si128(src2))); | 152 return Sk16b(widen_low_half_to_8888(_mm_cvtsi32_si128(src2))); |
157 } | 153 } |
158 SK_ALWAYS_INLINE Sk4px Sk4px::Load1(const SkPMColor16 src[1]) { | 154 inline Sk4px Sk4px::Load1(const SkPMColor16 src[1]) { |
159 return Sk16b(widen_low_half_to_8888(_mm_insert_epi16(_mm_setzero_si128(), sr
c[0], 0))); | 155 return Sk16b(widen_low_half_to_8888(_mm_insert_epi16(_mm_setzero_si128(), sr
c[0], 0))); |
160 } | 156 } |
161 | 157 |
162 SK_ALWAYS_INLINE void Sk4px::store4(SkPMColor16 dst[4]) const { | 158 inline void Sk4px::store4(SkPMColor16 dst[4]) const { |
163 _mm_storel_epi64((__m128i*)dst, narrow_to_565(this->fVec)); | 159 _mm_storel_epi64((__m128i*)dst, narrow_to_565(this->fVec)); |
164 } | 160 } |
165 SK_ALWAYS_INLINE void Sk4px::store2(SkPMColor16 dst[2]) const { | 161 inline void Sk4px::store2(SkPMColor16 dst[2]) const { |
166 uint32_t dst2 = _mm_cvtsi128_si32(narrow_to_565(this->fVec)); | 162 uint32_t dst2 = _mm_cvtsi128_si32(narrow_to_565(this->fVec)); |
167 dst[0] = dst2; | 163 dst[0] = dst2; |
168 dst[1] = dst2 >> 16; | 164 dst[1] = dst2 >> 16; |
169 } | 165 } |
170 SK_ALWAYS_INLINE void Sk4px::store1(SkPMColor16 dst[1]) const { | 166 inline void Sk4px::store1(SkPMColor16 dst[1]) const { |
171 uint32_t dst2 = _mm_cvtsi128_si32(narrow_to_565(this->fVec)); | 167 uint32_t dst2 = _mm_cvtsi128_si32(narrow_to_565(this->fVec)); |
172 dst[0] = dst2; | 168 dst[0] = dst2; |
173 } | 169 } |
| 170 |
| 171 } // namespace |
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