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Diffstat (limited to 'src/opts/SkPx_sse.h')
-rw-r--r-- | src/opts/SkPx_sse.h | 155 |
1 files changed, 0 insertions, 155 deletions
diff --git a/src/opts/SkPx_sse.h b/src/opts/SkPx_sse.h deleted file mode 100644 index 2560946edb..0000000000 --- a/src/opts/SkPx_sse.h +++ /dev/null @@ -1,155 +0,0 @@ -/* - * Copyright 2015 Google Inc. - * - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - */ - -#ifndef SkPx_sse_DEFINED -#define SkPx_sse_DEFINED - -// sse::SkPx's sweet spot is to work with 4 pixels at a time, -// stored interlaced, just as they sit in memory: rgba rgba rgba rgba. - -// sse::SkPx's best way to work with alphas is similar, -// replicating the 4 alphas 4 times each across the pixel: aaaa aaaa aaaa aaaa. - -// When working with fewer than 4 pixels, we load the pixels in the low lanes, -// usually filling the top lanes with zeros (but who cares, might be junk). - -namespace sse { - -struct SkPx { - static const int N = 4; - - __m128i fVec; - SkPx(__m128i vec) : fVec(vec) {} - - static SkPx Dup(uint32_t px) { return _mm_set1_epi32(px); } - static SkPx Load(const uint32_t* px) { return _mm_loadu_si128((const __m128i*)px); } - static SkPx Load(const uint32_t* px, int n) { - SkASSERT(n > 0 && n < 4); - switch (n) { - case 1: return _mm_cvtsi32_si128(px[0]); - case 2: return _mm_loadl_epi64((const __m128i*)px); - case 3: return _mm_or_si128(_mm_loadl_epi64((const __m128i*)px), - _mm_slli_si128(_mm_cvtsi32_si128(px[2]), 8)); - } - return _mm_setzero_si128(); // Not actually reachable. - } - - void store(uint32_t* px) const { _mm_storeu_si128((__m128i*)px, fVec); } - void store(uint32_t* px, int n) const { - SkASSERT(n > 0 && n < 4); - __m128i v = fVec; - if (n & 1) { - *px++ = _mm_cvtsi128_si32(v); - v = _mm_srli_si128(v, 4); - } - if (n & 2) { - _mm_storel_epi64((__m128i*)px, v); - } - } - - struct Alpha { - __m128i fVec; - Alpha(__m128i vec) : fVec(vec) {} - - static Alpha Dup(uint8_t a) { return _mm_set1_epi8(a); } - static Alpha Load(const uint8_t* a) { - __m128i as = _mm_cvtsi32_si128(*(const uint32_t*)a); // ____ ____ ____ 3210 - #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3 - return _mm_shuffle_epi8(as, _mm_set_epi8(3,3,3,3, 2,2,2,2, 1,1,1,1, 0,0,0,0)); - #else - as = _mm_unpacklo_epi8 (as, as); // ____ ____ 3322 1100 - as = _mm_unpacklo_epi16(as, as); // 3333 2222 1111 0000 - return as; - #endif - } - static Alpha Load(const uint8_t* a, int n) { - SkASSERT(n > 0 && n < 4); - uint8_t a4[] = { 0,0,0,0 }; - switch (n) { - case 3: a4[2] = a[2]; // fall through - case 2: a4[1] = a[1]; // fall through - case 1: a4[0] = a[0]; - } - return Load(a4); - } - - Alpha inv() const { return _mm_sub_epi8(_mm_set1_epi8(~0), fVec); } - }; - - struct Wide { - __m128i fLo, fHi; - Wide(__m128i lo, __m128i hi) : fLo(lo), fHi(hi) {} - - Wide operator+(const Wide& o) const { - return Wide(_mm_add_epi16(fLo, o.fLo), _mm_add_epi16(fHi, o.fHi)); - } - Wide operator-(const Wide& o) const { - return Wide(_mm_sub_epi16(fLo, o.fLo), _mm_sub_epi16(fHi, o.fHi)); - } - template <int bits> Wide shl() const { - return Wide(_mm_slli_epi16(fLo, bits), _mm_slli_epi16(fHi, bits)); - } - template <int bits> Wide shr() const { - return Wide(_mm_srli_epi16(fLo, bits), _mm_srli_epi16(fHi, bits)); - } - - SkPx addNarrowHi(const SkPx& o) const { - Wide sum = (*this + o.widenLo()).shr<8>(); - return _mm_packus_epi16(sum.fLo, sum.fHi); - } - }; - - Alpha alpha() const { - #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3 - return _mm_shuffle_epi8(fVec, _mm_set_epi8(15,15,15,15, 11,11,11,11, 7,7,7,7, 3,3,3,3)); - #else - // 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 as; - #endif - } - - Wide widenLo() const { - return Wide(_mm_unpacklo_epi8(fVec, _mm_setzero_si128()), - _mm_unpackhi_epi8(fVec, _mm_setzero_si128())); - } - Wide widenHi() const { - return Wide(_mm_unpacklo_epi8(_mm_setzero_si128(), fVec), - _mm_unpackhi_epi8(_mm_setzero_si128(), fVec)); - } - Wide widenLoHi() const { - return Wide(_mm_unpacklo_epi8(fVec, fVec), - _mm_unpackhi_epi8(fVec, fVec)); - } - - SkPx operator+(const SkPx& o) const { return _mm_add_epi8(fVec, o.fVec); } - SkPx operator-(const SkPx& o) const { return _mm_sub_epi8(fVec, o.fVec); } - SkPx saturatedAdd(const SkPx& o) const { return _mm_adds_epi8(fVec, o.fVec); } - - Wide operator*(const Alpha& a) const { - __m128i pLo = _mm_unpacklo_epi8( fVec, _mm_setzero_si128()), - aLo = _mm_unpacklo_epi8(a.fVec, _mm_setzero_si128()), - pHi = _mm_unpackhi_epi8( fVec, _mm_setzero_si128()), - aHi = _mm_unpackhi_epi8(a.fVec, _mm_setzero_si128()); - return Wide(_mm_mullo_epi16(pLo, aLo), _mm_mullo_epi16(pHi, aHi)); - } - SkPx approxMulDiv255(const Alpha& a) const { - return (*this * a).addNarrowHi(*this); - } - - SkPx addAlpha(const Alpha& a) const { - return _mm_add_epi8(fVec, _mm_and_si128(a.fVec, _mm_set1_epi32(0xFF000000))); - } -}; - -} // namespace sse - -typedef sse::SkPx SkPx; - -#endif//SkPx_sse_DEFINED |