diff options
Diffstat (limited to 'src/jumper/SkJumper_stages_lowp.cpp')
| -rw-r--r-- | src/jumper/SkJumper_stages_lowp.cpp | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/src/jumper/SkJumper_stages_lowp.cpp b/src/jumper/SkJumper_stages_lowp.cpp index 81520f16ab..4d0df94af6 100644 --- a/src/jumper/SkJumper_stages_lowp.cpp +++ b/src/jumper/SkJumper_stages_lowp.cpp @@ -121,14 +121,13 @@ SI void from_8888(U32 rgba, F* r, F* g, F* b, F* a) { U16 lo = unaligned_load<U16>((const uint32_t*)&rgba + 0), hi = unaligned_load<U16>((const uint32_t*)&rgba + 4); - U16 _0415 = _mm_unpacklo_epi8(lo, hi), // r0 r4 g0 g4 b0 b4 a0 a4 r1 r5 g1 g5 b1 b5 a1 a5 - _2637 = _mm_unpackhi_epi8(lo, hi); + // Shuffle so that the 4 bytes of each color channel are contiguous... + lo = _mm_shuffle_epi8(lo, _mm_setr_epi8(0,4,8,12, 1,5,9,13, 2,6,10,14, 3,7,11,15)); + hi = _mm_shuffle_epi8(hi, _mm_setr_epi8(0,4,8,12, 1,5,9,13, 2,6,10,14, 3,7,11,15)); - U16 even = _mm_unpacklo_epi8(_0415, _2637), // r0 r2 r4 r6 g0 g2 g4 g6 b0 b2 b4 b6 a0 a2 a4 a6 - odd = _mm_unpackhi_epi8(_0415, _2637); - - U16 rg = _mm_unpacklo_epi8(even, odd), // r0 r1 r2 r3 r4 r5 r6 r7 g0 g1 g2 g3 g4 g5 g6 g7 - ba = _mm_unpackhi_epi8(even, odd); + // ...then get all 8 bytes of each color channel together into a single register. + U16 rg = _mm_unpacklo_epi32(lo,hi), + ba = _mm_unpackhi_epi32(lo,hi); // Unpack as 16-bit values into the high half of each 16-bit lane, to get a free *256. U16 R = _mm_unpacklo_epi8(U16(0), rg), |