diff options
Diffstat (limited to 'gfx/skia/skia/src/opts/Sk4px_SSE2.h')
| -rw-r--r-- | gfx/skia/skia/src/opts/Sk4px_SSE2.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/gfx/skia/skia/src/opts/Sk4px_SSE2.h b/gfx/skia/skia/src/opts/Sk4px_SSE2.h new file mode 100644 index 000000000..dc0c8ace7 --- /dev/null +++ b/gfx/skia/skia/src/opts/Sk4px_SSE2.h @@ -0,0 +1,104 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +namespace { // See Sk4px.h + +inline Sk4px Sk4px::DupPMColor(SkPMColor px) { return Sk16b(_mm_set1_epi32(px)); } + +inline Sk4px Sk4px::Load4(const SkPMColor px[4]) { + return Sk16b(_mm_loadu_si128((const __m128i*)px)); +} +inline Sk4px Sk4px::Load2(const SkPMColor px[2]) { + return Sk16b(_mm_loadl_epi64((const __m128i*)px)); +} +inline Sk4px Sk4px::Load1(const SkPMColor px[1]) { return Sk16b(_mm_cvtsi32_si128(*px)); } + +inline void Sk4px::store4(SkPMColor px[4]) const { _mm_storeu_si128((__m128i*)px, this->fVec); } +inline void Sk4px::store2(SkPMColor px[2]) const { _mm_storel_epi64((__m128i*)px, this->fVec); } +inline void Sk4px::store1(SkPMColor px[1]) const { *px = _mm_cvtsi128_si32(this->fVec); } + +inline Sk4px::Wide Sk4px::widenLo() const { + return Sk16h(_mm_unpacklo_epi8(this->fVec, _mm_setzero_si128()), + _mm_unpackhi_epi8(this->fVec, _mm_setzero_si128())); +} + +inline Sk4px::Wide Sk4px::widenHi() const { + return Sk16h(_mm_unpacklo_epi8(_mm_setzero_si128(), this->fVec), + _mm_unpackhi_epi8(_mm_setzero_si128(), this->fVec)); +} + +inline Sk4px::Wide Sk4px::widenLoHi() const { + return Sk16h(_mm_unpacklo_epi8(this->fVec, this->fVec), + _mm_unpackhi_epi8(this->fVec, this->fVec)); +} + +inline Sk4px::Wide Sk4px::mulWiden(const Sk16b& other) const { + return this->widenLo() * Sk4px(other).widenLo(); +} + +inline Sk4px Sk4px::Wide::addNarrowHi(const Sk16h& other) const { + Sk4px::Wide r = (*this + other) >> 8; + return Sk4px(_mm_packus_epi16(r.fLo.fVec, r.fHi.fVec)); +} + +inline Sk4px Sk4px::Wide::div255() const { + // (x + 127) / 255 == ((x+128) * 257)>>16, + // and _mm_mulhi_epu16 makes the (_ * 257)>>16 part very convenient. + const __m128i _128 = _mm_set1_epi16(128), + _257 = _mm_set1_epi16(257); + return Sk4px(_mm_packus_epi16(_mm_mulhi_epu16(_mm_add_epi16(fLo.fVec, _128), _257), + _mm_mulhi_epu16(_mm_add_epi16(fHi.fVec, _128), _257))); +} + +// Load4Alphas and Load2Alphas use possibly-unaligned loads (SkAlpha[] -> uint16_t or uint32_t). +// These are safe on x86, often with no speed penalty. + +#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3 + inline Sk4px Sk4px::alphas() const { + static_assert(SK_A32_SHIFT == 24, "Intel's always little-endian."); + __m128i splat = _mm_set_epi8(15,15,15,15, 11,11,11,11, 7,7,7,7, 3,3,3,3); + return Sk16b(_mm_shuffle_epi8(this->fVec, splat)); + } + + inline Sk4px Sk4px::Load4Alphas(const SkAlpha a[4]) { + uint32_t as = *(const uint32_t*)a; + __m128i splat = _mm_set_epi8(3,3,3,3, 2,2,2,2, 1,1,1,1, 0,0,0,0); + return Sk16b(_mm_shuffle_epi8(_mm_cvtsi32_si128(as), splat)); + } +#else + inline Sk4px Sk4px::alphas() const { + static_assert(SK_A32_SHIFT == 24, "Intel's always little-endian."); + // We exploit that A >= rgb for any premul pixel. + __m128i as = fVec; // 3xxx 2xxx 1xxx 0xxx + as = _mm_max_epu8(as, _mm_srli_epi32(as, 8)); // 33xx 22xx 11xx 00xx + as = _mm_max_epu8(as, _mm_srli_epi32(as, 16)); // 3333 2222 1111 0000 + return Sk16b(as); + } + + inline Sk4px Sk4px::Load4Alphas(const SkAlpha a[4]) { + __m128i as = _mm_cvtsi32_si128(*(const uint32_t*)a); // ____ ____ ____ 3210 + as = _mm_unpacklo_epi8 (as, as); // ____ ____ 3322 1100 + as = _mm_unpacklo_epi16(as, as); // 3333 2222 1111 0000 + return Sk16b(as); + } +#endif + +inline Sk4px Sk4px::Load2Alphas(const SkAlpha a[2]) { + uint32_t as = *(const uint16_t*)a; // Aa -> Aa00 + return Load4Alphas((const SkAlpha*)&as); +} + +inline Sk4px Sk4px::zeroColors() const { + return Sk16b(_mm_and_si128(_mm_set1_epi32(0xFF << SK_A32_SHIFT), this->fVec)); +} + +inline Sk4px Sk4px::zeroAlphas() const { + // andnot(a,b) == ~a & b + return Sk16b(_mm_andnot_si128(_mm_set1_epi32(0xFF << SK_A32_SHIFT), this->fVec)); +} + +} // namespace |