diff options
Diffstat (limited to 'src/opts/SkColor_opts_SSE2.h')
-rw-r--r-- | src/opts/SkColor_opts_SSE2.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/opts/SkColor_opts_SSE2.h b/src/opts/SkColor_opts_SSE2.h index 24ab6f73c8..960c48a023 100644 --- a/src/opts/SkColor_opts_SSE2.h +++ b/src/opts/SkColor_opts_SSE2.h @@ -10,6 +10,10 @@ #include <emmintrin.h> +static inline __m128i SkAlpha255To256_SSE2(const __m128i& alpha) { + return _mm_add_epi32(alpha, _mm_set1_epi32(1)); +} + // See #define SkAlphaMulAlpha(a, b) SkMulDiv255Round(a, b) in SkXfermode.cpp. static inline __m128i SkAlphaMulAlpha_SSE2(const __m128i& a, const __m128i& b) { @@ -21,6 +25,27 @@ static inline __m128i SkAlphaMulAlpha_SSE2(const __m128i& a, return prod; } +// Portable version SkAlphaMulQ is in SkColorPriv.h. +static inline __m128i SkAlphaMulQ_SSE2(const __m128i& c, const __m128i& scale) { + __m128i mask = _mm_set1_epi32(gMask_00FF00FF); + __m128i s = _mm_or_si128(_mm_slli_epi32(scale, 16), scale); + + // uint32_t rb = ((c & mask) * scale) >> 8 + __m128i rb = _mm_and_si128(mask, c); + rb = _mm_mullo_epi16(rb, s); + rb = _mm_srli_epi16(rb, 8); + + // uint32_t ag = ((c >> 8) & mask) * scale + __m128i ag = _mm_srli_epi16(c, 8); + ag = _mm_and_si128(ag, mask); + ag = _mm_mullo_epi16(ag, s); + + // (rb & mask) | (ag & ~mask) + rb = _mm_and_si128(mask, rb); + ag = _mm_andnot_si128(mask, ag); + return _mm_or_si128(rb, ag); +} + static inline __m128i SkGetPackedA32_SSE2(const __m128i& src) { __m128i a = _mm_slli_epi32(src, (24 - SK_A32_SHIFT)); return _mm_srli_epi32(a, 24); |