diff options
Diffstat (limited to 'src/gui/painting/qdrawingprimitive_sse2_p.h')
| -rw-r--r-- | src/gui/painting/qdrawingprimitive_sse2_p.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/gui/painting/qdrawingprimitive_sse2_p.h b/src/gui/painting/qdrawingprimitive_sse2_p.h index fbee06e157..4d0790a502 100644 --- a/src/gui/painting/qdrawingprimitive_sse2_p.h +++ b/src/gui/painting/qdrawingprimitive_sse2_p.h @@ -236,4 +236,25 @@ QT_END_NAMESPACE #endif // __SSE2__ +QT_BEGIN_NAMESPACE +#if QT_COMPILER_SUPPORTS_HERE(SSE4_1) +QT_FUNCTION_TARGET(SSE4_1) +inline QRgb qUnpremultiply_sse4(QRgb p) +{ + const uint alpha = qAlpha(p); + const uint invAlpha = qt_inv_premul_factor[alpha]; + const __m128i via = _mm_set1_epi32(invAlpha); + const __m128i vr = _mm_set1_epi32(0x8000); + __m128i vl = _mm_cvtepu8_epi32(_mm_cvtsi32_si128(p)); + vl = _mm_mullo_epi32(vl, via); + vl = _mm_add_epi32(vl, vr); + vl = _mm_srai_epi32(vl, 16); + vl = _mm_insert_epi32(vl, alpha, 3); + vl = _mm_packus_epi32(vl, _mm_setzero_si128()); + vl = _mm_packus_epi16(vl, _mm_setzero_si128()); + return _mm_cvtsi128_si32(vl); +} +#endif +QT_END_NAMESPACE + #endif // QDRAWINGPRIMITIVE_SSE2_P_H |