1 files changed, 9 insertions, 0 deletions
diff --git a/src/gui/painting/qpixellayout.cpp b/src/gui/painting/qpixellayout.cpp
index acaee9f289..8dd62b0c00 100644
--- a/src/gui/painting/qpixellayout.cpp
+++ b/src/gui/painting/qpixellayout.cpp
@@ -1045,8 +1045,17 @@ static const QRgba64 *QT_FASTCALL fetchRGBA64ToRGBA64PM(QRgba64 *buffer, const u
                                                         const QList<QRgb> *, QDitherInfo *)
 {
     const QRgba64 *s = reinterpret_cast<const QRgba64 *>(src) + index;
+#ifdef __SSE2__
+    for (int i = 0; i < count; ++i) {
+        __m128i vs = _mm_loadl_epi64((const __m128i *)(s + i));
+        __m128i va = _mm_shufflelo_epi16(vs, _MM_SHUFFLE(3, 3, 3, 3));
+        vs = multiplyAlpha65535(vs, va);
+        _mm_storel_epi64((__m128i *)(buffer + i), vs);
+    }
+#else
     for (int i = 0; i < count; ++i)
         buffer[i] = QRgba64::fromRgba64(s[i]).premultiplied();
+#endif
     return buffer;
 }