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| author | Allan Sandfeld Jensen <allan.jensen@theqtcompany.com> | 2015-02-23 14:34:11 +0100 |
|---|---|---|
| committer | Allan Sandfeld Jensen <allan.jensen@theqtcompany.com> | 2015-02-26 09:56:22 +0000 |
| commit | d49b2f700fe1e8ba9185f683280cc916e2249baf (patch) | |
| tree | 333f1de4e4c966a74c059b2e289f7facf8a62c6b /src/gui/painting/qdrawingprimitive_sse2_p.h | |
| parent | a09e67c2f7a796ec66c217fc25b2b8cd45812591 (diff) | |
Minor optimization in SSE4 unpremultiply
Use a more direct conversion to desired unpacked format.
Change-Id: I47e4a31c580f294c4e717850c4a420e16214e0a9
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'src/gui/painting/qdrawingprimitive_sse2_p.h')
| -rw-r--r-- | src/gui/painting/qdrawingprimitive_sse2_p.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/src/gui/painting/qdrawingprimitive_sse2_p.h b/src/gui/painting/qdrawingprimitive_sse2_p.h index 22d1205074..aded999cdd 100644 --- a/src/gui/painting/qdrawingprimitive_sse2_p.h +++ b/src/gui/painting/qdrawingprimitive_sse2_p.h @@ -245,8 +245,7 @@ inline QRgb qUnpremultiply_sse4(QRgb 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_unpacklo_epi8(_mm_cvtsi32_si128(p), _mm_setzero_si128()); - vl = _mm_unpacklo_epi16(vl, _mm_setzero_si128()); + __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); |