Merge remote-tracking branch 'origin/5.5' into dev

Conflicts:
	src/tools/qdoc/tree.cpp
	tests/auto/gui/painting/qcolor/tst_qcolor.cpp

Change-Id: Iaa78f601a63191fa643aabf853520f913f2f0fdc

1 files changed, 19 insertions, 0 deletions

diff --git a/tests/auto/gui/painting/qcolor/tst_qcolor.cpp b/tests/auto/gui/painting/qcolor/tst_qcolor.cpp
index ca9f6cb9f4..cf0d82f3f7 100644
--- a/tests/auto/gui/painting/qcolor/tst_qcolor.cpp
+++ b/tests/auto/gui/painting/qcolor/tst_qcolor.cpp
@@ -38,6 +38,7 @@
 
 #include <qcolor.h>
 #include <qdebug.h>
+#include <private/qdrawingprimitive_sse2_p.h>
 #include <qrgba64.h>
 
 class tst_QColor : public QObject
@@ -104,6 +105,7 @@ private slots:
     void achromaticHslHue();
 
     void premultiply();
+    void unpremultiply_sse4();
     void qrgba64();
     void qrgba64Premultiply();
     void qrgba64Equivalence();
@@ -1449,6 +1451,23 @@ void tst_QColor::premultiply()
     }
 }
 
+void tst_QColor::unpremultiply_sse4()
+{
+    // Tests that qUnpremultiply_sse4 returns the same as qUnpremultiply.
+#if QT_COMPILER_SUPPORTS_HERE(SSE4_1)
+    if (qCpuHasFeature(SSE4_1)) {
+        for (uint a = 0; a < 256; a++) {
+            for (uint c = 0; c <= a; c++) {
+                QRgb p = qRgba(c, a-c, c, a);
+                QCOMPARE(qUnpremultiply(p), qUnpremultiply_sse4(p));
+            }
+        }
+        return;
+    }
+#endif
+    QSKIP("SSE4 not supported on this CPU.");
+}
+
 void tst_QColor::qrgba64()
 {
     QRgba64 rgb64 = QRgba64::fromRgba(0x22, 0x33, 0x44, 0xff);