diff options
| author | Allan Sandfeld Jensen <allan.jensen@qt.io> | 2019-05-06 12:35:05 +0200 |
|---|---|---|
| committer | Allan Sandfeld Jensen <allan.jensen@qt.io> | 2019-05-10 19:35:10 +0000 |
| commit | 4d2ee7f358a5cea64e7093aa0ab54e6422f8915e (patch) | |
| tree | a9fcab0f205f8854f69da3d7a73fdfa17f6f1626 /src/gui | |
| parent | 2a1651cc164b270dac81f4caa1fb8ded4fab6e4b (diff) | |
Add unvectorized fallback in case FP exceptions are not masked
If an application enables FP exceptions our FP-based unpremul will
raise the INVALID exception. Since disabling them locally might be slow
just take a slow path when detected.
Fixes: QTBUG-75592
Change-Id: Ie22a032a4f62229f68ad21ede359c62291adc9bf
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'src/gui')
| -rw-r--r-- | src/gui/painting/qdrawhelper_sse4.cpp | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/gui/painting/qdrawhelper_sse4.cpp b/src/gui/painting/qdrawhelper_sse4.cpp index f6c2f11eaf..9daaaecc98 100644 --- a/src/gui/painting/qdrawhelper_sse4.cpp +++ b/src/gui/painting/qdrawhelper_sse4.cpp @@ -107,6 +107,17 @@ template<bool RGBA, bool RGBx> static inline void convertARGBFromARGB32PM_sse4(uint *buffer, const uint *src, int count) { int i = 0; + if ((_MM_GET_EXCEPTION_MASK() & _MM_MASK_INVALID) == 0) { + for (; i < count; ++i) { + uint v = qUnpremultiply(src[i]); + if (RGBx) + v = 0xff000000 | v; + if (RGBA) + v = ARGB2RGBA(v); + buffer[i] = v; + } + return; + } const __m128i alphaMask = _mm_set1_epi32(0xff000000); const __m128i rgbaMask = _mm_setr_epi8(2, 1, 0, 3, 6, 5, 4, 7, 10, 9, 8, 11, 14, 13, 12, 15); const __m128i zero = _mm_setzero_si128(); @@ -174,6 +185,13 @@ template<bool RGBA> static inline void convertARGBFromRGBA64PM_sse4(uint *buffer, const QRgba64 *src, int count) { int i = 0; + if ((_MM_GET_EXCEPTION_MASK() & _MM_MASK_INVALID) == 0) { + for (; i < count; ++i) { + const QRgba64 v = src[i].unpremultiplied(); + buffer[i] = RGBA ? toRgba8888(v) : toArgb32(v); + } + return; + } const __m128i alphaMask = _mm_set1_epi64x(qint64(Q_UINT64_C(0xffff) << 48)); const __m128i alphaMask32 = _mm_set1_epi32(0xff000000); const __m128i rgbaMask = _mm_setr_epi8(2, 1, 0, 3, 6, 5, 4, 7, 10, 9, 8, 11, 14, 13, 12, 15); |