Allow Windows x64 to use SSE2 to speed up blending

Windows 64 does not support MMX with MSVC. This is a problem
with the way SSE is currently used because it rely on previous
vector instructions being available.
This patches fixes that by using the intended functions for
SSE2 on Windows.

Merge-request: 792
Reviewed-by: Benjamin Poulain <benjamin.poulain@nokia.com>

4 files changed, 229 insertions, 105 deletions

diff --git a/src/gui/painting/qdrawhelper.cpp b/src/gui/painting/qdrawhelper.cpp
index cf487b5..03ed597 100644
--- a/src/gui/painting/qdrawhelper.cpp
+++ b/src/gui/painting/qdrawhelper.cpp
@@ -1485,7 +1485,7 @@ static const uint L2CacheLineLengthInInts = L2CacheLineLength/sizeof(uint);
     }\
 }
 
-static void QT_FASTCALL comp_func_solid_Clear(uint *dest, int length, uint, uint const_alpha)
+void QT_FASTCALL comp_func_solid_Clear(uint *dest, int length, uint, uint const_alpha)
 {
     comp_func_Clear_impl(dest, length, const_alpha);
 }
@@ -1499,7 +1499,7 @@ void QT_FASTCALL comp_func_Clear(uint *dest, const uint *, int length, uint cons
   result = s
   dest = s * ca + d * cia
 */
-static void QT_FASTCALL comp_func_solid_Source(uint *dest, int length, uint color, uint const_alpha)
+void QT_FASTCALL comp_func_solid_Source(uint *dest, int length, uint color, uint const_alpha)
 {
     if (const_alpha == 255) {
         QT_MEMFILL_UINT(dest, length, color);
@@ -1528,7 +1528,7 @@ void QT_FASTCALL comp_func_Source(uint *dest, const uint *src, int length, uint
     }
 }
 
-static void QT_FASTCALL comp_func_solid_Destination(uint *, int, uint, uint)
+void QT_FASTCALL comp_func_solid_Destination(uint *, int, uint, uint)
 {
 }
 
@@ -1542,7 +1542,7 @@ void QT_FASTCALL comp_func_Destination(uint *, const uint *, int, uint)
        = s * ca + d * (sia * ca + cia)
        = s * ca + d * (1 - sa*ca)
 */
-static void QT_FASTCALL comp_func_solid_SourceOver(uint *dest, int length, uint color, uint const_alpha)
+void QT_FASTCALL comp_func_solid_SourceOver(uint *dest, int length, uint color, uint const_alpha)
 {
     if ((const_alpha & qAlpha(color)) == 255) {
         QT_MEMFILL_UINT(dest, length, color);
@@ -1583,7 +1583,7 @@ void QT_FASTCALL comp_func_SourceOver(uint *dest, const uint *src, int length, u
   dest = (d + s * dia) * ca + d * cia
        = d + s * dia * ca
 */
-static void QT_FASTCALL comp_func_solid_DestinationOver(uint *dest, int length, uint color, uint const_alpha)
+void QT_FASTCALL comp_func_solid_DestinationOver(uint *dest, int length, uint color, uint const_alpha)
 {
     if (const_alpha != 255)
         color = BYTE_MUL(color, const_alpha);
@@ -1618,7 +1618,7 @@ void QT_FASTCALL comp_func_DestinationOver(uint *dest, const uint *src, int leng
   result = s * da
   dest = s * da * ca + d * cia
 */
-static void QT_FASTCALL comp_func_solid_SourceIn(uint *dest, int length, uint color, uint const_alpha)
+void QT_FASTCALL comp_func_solid_SourceIn(uint *dest, int length, uint color, uint const_alpha)
 {
     PRELOAD_INIT(dest)
     if (const_alpha == 255) {
@@ -1661,7 +1661,7 @@ void QT_FASTCALL comp_func_SourceIn(uint *dest, const uint *src, int length, uin
   dest = d * sa * ca + d * cia
        = d * (sa * ca + cia)
 */
-static void QT_FASTCALL comp_func_solid_DestinationIn(uint *dest, int length, uint color, uint const_alpha)
+void QT_FASTCALL comp_func_solid_DestinationIn(uint *dest, int length, uint color, uint const_alpha)
 {
     uint a = qAlpha(color);
     if (const_alpha != 255) {
@@ -1697,7 +1697,7 @@ void QT_FASTCALL comp_func_DestinationIn(uint *dest, const uint *src, int length
   dest = s * dia * ca + d * cia
 */
 
-static void QT_FASTCALL comp_func_solid_SourceOut(uint *dest, int length, uint color, uint const_alpha)
+void QT_FASTCALL comp_func_solid_SourceOut(uint *dest, int length, uint color, uint const_alpha)
 {
     PRELOAD_INIT(dest)
     if (const_alpha == 255) {
@@ -1740,7 +1740,7 @@ void QT_FASTCALL comp_func_SourceOut(uint *dest, const uint *src, int length, ui
   dest = d * sia * ca + d * cia
        = d * (sia * ca + cia)
 */
-static void QT_FASTCALL comp_func_solid_DestinationOut(uint *dest, int length, uint color, uint const_alpha)
+void QT_FASTCALL comp_func_solid_DestinationOut(uint *dest, int length, uint color, uint const_alpha)
 {
     uint a = qAlpha(~color);
     if (const_alpha != 255)
@@ -1776,7 +1776,7 @@ void QT_FASTCALL comp_func_DestinationOut(uint *dest, const uint *src, int lengt
        = s*ca * da + d * (sia*ca + cia)
        = s*ca * da + d * (1 - sa*ca)
 */
-static void QT_FASTCALL comp_func_solid_SourceAtop(uint *dest, int length, uint color, uint const_alpha)
+void QT_FASTCALL comp_func_solid_SourceAtop(uint *dest, int length, uint color, uint const_alpha)
 {
     if (const_alpha != 255) {
         color = BYTE_MUL(color, const_alpha);
@@ -1814,7 +1814,7 @@ void QT_FASTCALL comp_func_SourceAtop(uint *dest, const uint *src, int length, u
   dest = d*sa*ca + s*dia*ca + d *cia
        = s*ca * dia + d * (sa*ca + cia)
 */
-static void QT_FASTCALL comp_func_solid_DestinationAtop(uint *dest, int length, uint color, uint const_alpha)
+void QT_FASTCALL comp_func_solid_DestinationAtop(uint *dest, int length, uint color, uint const_alpha)
 {
     uint a = qAlpha(color);
     if (const_alpha != 255) {
@@ -1857,7 +1857,7 @@ void QT_FASTCALL comp_func_DestinationAtop(uint *dest, const uint *src, int leng
        = s*ca * dia + d * (sia*ca + cia)
        = s*ca * dia + d * (1 - sa*ca)
 */
-static void QT_FASTCALL comp_func_solid_XOR(uint *dest, int length, uint color, uint const_alpha)
+void QT_FASTCALL comp_func_solid_XOR(uint *dest, int length, uint color, uint const_alpha)
 {
     if (const_alpha != 255)
         color = BYTE_MUL(color, const_alpha);
@@ -1938,7 +1938,7 @@ Q_STATIC_TEMPLATE_FUNCTION inline void comp_func_solid_Plus_impl(uint *dest, int
     }
 }
 
-static void QT_FASTCALL comp_func_solid_Plus(uint *dest, int length, uint color, uint const_alpha)
+void QT_FASTCALL comp_func_solid_Plus(uint *dest, int length, uint color, uint const_alpha)
 {
     if (const_alpha == 255)
         comp_func_solid_Plus_impl(dest, length, color, QFullCoverage());
@@ -2002,7 +2002,7 @@ Q_STATIC_TEMPLATE_FUNCTION inline void comp_func_solid_Multiply_impl(uint *dest,
     }
 }
 
-static void QT_FASTCALL comp_func_solid_Multiply(uint *dest, int length, uint color, uint const_alpha)
+void QT_FASTCALL comp_func_solid_Multiply(uint *dest, int length, uint color, uint const_alpha)
 {
     if (const_alpha == 255)
         comp_func_solid_Multiply_impl(dest, length, color, QFullCoverage());
@@ -2070,7 +2070,7 @@ Q_STATIC_TEMPLATE_FUNCTION inline void comp_func_solid_Screen_impl(uint *dest, i
     }
 }
 
-static void QT_FASTCALL comp_func_solid_Screen(uint *dest, int length, uint color, uint const_alpha)
+void QT_FASTCALL comp_func_solid_Screen(uint *dest, int length, uint color, uint const_alpha)
 {
     if (const_alpha == 255)
         comp_func_solid_Screen_impl(dest, length, color, QFullCoverage());
@@ -2149,7 +2149,7 @@ Q_STATIC_TEMPLATE_FUNCTION inline void comp_func_solid_Overlay_impl(uint *dest,
     }
 }
 
-static void QT_FASTCALL comp_func_solid_Overlay(uint *dest, int length, uint color, uint const_alpha)
+void QT_FASTCALL comp_func_solid_Overlay(uint *dest, int length, uint color, uint const_alpha)
 {
     if (const_alpha == 255)
         comp_func_solid_Overlay_impl(dest, length, color, QFullCoverage());
@@ -2222,7 +2222,7 @@ Q_STATIC_TEMPLATE_FUNCTION inline void comp_func_solid_Darken_impl(uint *dest, i
     }
 }
 
-static void QT_FASTCALL comp_func_solid_Darken(uint *dest, int length, uint color, uint const_alpha)
+void QT_FASTCALL comp_func_solid_Darken(uint *dest, int length, uint color, uint const_alpha)
 {
     if (const_alpha == 255)
         comp_func_solid_Darken_impl(dest, length, color, QFullCoverage());
@@ -2295,7 +2295,7 @@ Q_STATIC_TEMPLATE_FUNCTION inline void comp_func_solid_Lighten_impl(uint *dest,
     }
 }
 
-static void QT_FASTCALL comp_func_solid_Lighten(uint *dest, int length, uint color, uint const_alpha)
+void QT_FASTCALL comp_func_solid_Lighten(uint *dest, int length, uint color, uint const_alpha)
 {
     if (const_alpha == 255)
         comp_func_solid_Lighten_impl(dest, length, color, QFullCoverage());
@@ -2378,7 +2378,7 @@ Q_STATIC_TEMPLATE_FUNCTION inline void comp_func_solid_ColorDodge_impl(uint *des
     }
 }
 
-static void QT_FASTCALL comp_func_solid_ColorDodge(uint *dest, int length, uint color, uint const_alpha)
+void QT_FASTCALL comp_func_solid_ColorDodge(uint *dest, int length, uint color, uint const_alpha)
 {
     if (const_alpha == 255)
         comp_func_solid_ColorDodge_impl(dest, length, color, QFullCoverage());
@@ -2461,7 +2461,7 @@ Q_STATIC_TEMPLATE_FUNCTION inline void comp_func_solid_ColorBurn_impl(uint *dest
     }
 }
 
-static void QT_FASTCALL comp_func_solid_ColorBurn(uint *dest, int length, uint color, uint const_alpha)
+void QT_FASTCALL comp_func_solid_ColorBurn(uint *dest, int length, uint color, uint const_alpha)
 {
     if (const_alpha == 255)
         comp_func_solid_ColorBurn_impl(dest, length, color, QFullCoverage());
@@ -2541,7 +2541,7 @@ Q_STATIC_TEMPLATE_FUNCTION inline void comp_func_solid_HardLight_impl(uint *dest
     }
 }
 
-static void QT_FASTCALL comp_func_solid_HardLight(uint *dest, int length, uint color, uint const_alpha)
+void QT_FASTCALL comp_func_solid_HardLight(uint *dest, int length, uint color, uint const_alpha)
 {
     if (const_alpha == 255)
         comp_func_solid_HardLight_impl(dest, length, color, QFullCoverage());
@@ -2632,7 +2632,7 @@ Q_STATIC_TEMPLATE_FUNCTION inline void comp_func_solid_SoftLight_impl(uint *dest
     }
 }
 
-static void QT_FASTCALL comp_func_solid_SoftLight(uint *dest, int length, uint color, uint const_alpha)
+void QT_FASTCALL comp_func_solid_SoftLight(uint *dest, int length, uint color, uint const_alpha)
 {
     if (const_alpha == 255)
         comp_func_solid_SoftLight_impl(dest, length, color, QFullCoverage());
@@ -2705,7 +2705,7 @@ Q_STATIC_TEMPLATE_FUNCTION inline void comp_func_solid_Difference_impl(uint *des
     }
 }
 
-static void QT_FASTCALL comp_func_solid_Difference(uint *dest, int length, uint color, uint const_alpha)
+void QT_FASTCALL comp_func_solid_Difference(uint *dest, int length, uint color, uint const_alpha)
 {
     if (const_alpha == 255)
         comp_func_solid_Difference_impl(dest, length, color, QFullCoverage());
@@ -2772,7 +2772,7 @@ Q_STATIC_TEMPLATE_FUNCTION inline void QT_FASTCALL comp_func_solid_Exclusion_imp
     }
 }
 
-static void QT_FASTCALL comp_func_solid_Exclusion(uint *dest, int length, uint color, uint const_alpha)
+void QT_FASTCALL comp_func_solid_Exclusion(uint *dest, int length, uint color, uint const_alpha)
 {
     if (const_alpha == 255)
         comp_func_solid_Exclusion_impl(dest, length, color, QFullCoverage());
@@ -2816,10 +2816,10 @@ void QT_FASTCALL comp_func_Exclusion(uint *dest, const uint *src, int length, ui
 #  pragma pop
 #endif
 
-static void QT_FASTCALL rasterop_solid_SourceOrDestination(uint *dest,
-                                                           int length,
-                                                           uint color,
-                                                           uint const_alpha)
+void QT_FASTCALL rasterop_solid_SourceOrDestination(uint *dest,
+                                                    int length,
+                                                    uint color,
+                                                    uint const_alpha)
 {
     Q_UNUSED(const_alpha);
     while (length--)
@@ -2836,10 +2836,10 @@ void QT_FASTCALL rasterop_SourceOrDestination(uint *dest,
         *dest++ |= *src++;
 }
 
-static void QT_FASTCALL rasterop_solid_SourceAndDestination(uint *dest,
-                                                            int length,
-                                                            uint color,
-                                                            uint const_alpha)
+void QT_FASTCALL rasterop_solid_SourceAndDestination(uint *dest,
+                                                     int length,
+                                                     uint color,
+                                                     uint const_alpha)
 {
     Q_UNUSED(const_alpha);
     color |= 0xff000000;
@@ -2859,10 +2859,10 @@ void QT_FASTCALL rasterop_SourceAndDestination(uint *dest,
     }
 }
 
-static void QT_FASTCALL rasterop_solid_SourceXorDestination(uint *dest,
-                                                            int length,
-                                                            uint color,
-                                                            uint const_alpha)
+void QT_FASTCALL rasterop_solid_SourceXorDestination(uint *dest,
+                                                     int length,
+                                                     uint color,
+                                                     uint const_alpha)
 {
     Q_UNUSED(const_alpha);
     color &= 0x00ffffff;
@@ -2882,10 +2882,10 @@ void QT_FASTCALL rasterop_SourceXorDestination(uint *dest,
     }
 }
 
-static void QT_FASTCALL rasterop_solid_NotSourceAndNotDestination(uint *dest,
-                                                                  int length,
-                                                                  uint color,
-                                                                  uint const_alpha)
+void QT_FASTCALL rasterop_solid_NotSourceAndNotDestination(uint *dest,
+                                                           int length,
+                                                           uint color,
+                                                           uint const_alpha)
 {
     Q_UNUSED(const_alpha);
     color = ~color;
@@ -2907,10 +2907,10 @@ void QT_FASTCALL rasterop_NotSourceAndNotDestination(uint *dest,
     }
 }
 
-static void QT_FASTCALL rasterop_solid_NotSourceOrNotDestination(uint *dest,
-                                                                 int length,
-                                                                 uint color,
-                                                                 uint const_alpha)
+void QT_FASTCALL rasterop_solid_NotSourceOrNotDestination(uint *dest,
+                                                          int length,
+                                                          uint color,
+                                                          uint const_alpha)
 {
     Q_UNUSED(const_alpha);
     color = ~color | 0xff000000;
@@ -2932,10 +2932,10 @@ void QT_FASTCALL rasterop_NotSourceOrNotDestination(uint *dest,
     }
 }
 
-static void QT_FASTCALL rasterop_solid_NotSourceXorDestination(uint *dest,
-                                                               int length,
-                                                               uint color,
-                                                               uint const_alpha)
+void QT_FASTCALL rasterop_solid_NotSourceXorDestination(uint *dest,
+                                                        int length,
+                                                        uint color,
+                                                        uint const_alpha)
 {
     Q_UNUSED(const_alpha);
     color = ~color & 0x00ffffff;
@@ -2957,8 +2957,8 @@ void QT_FASTCALL rasterop_NotSourceXorDestination(uint *dest,
     }
 }
 
-static void QT_FASTCALL rasterop_solid_NotSource(uint *dest, int length,
-                                                 uint color, uint const_alpha)
+void QT_FASTCALL rasterop_solid_NotSource(uint *dest, int length,
+                                          uint color, uint const_alpha)
 {
     Q_UNUSED(const_alpha);
     qt_memfill(dest, ~color | 0xff000000, length);
@@ -2972,10 +2972,10 @@ void QT_FASTCALL rasterop_NotSource(uint *dest, const uint *src,
         *dest++ = ~(*src++) | 0xff000000;
 }
 
-static void QT_FASTCALL rasterop_solid_NotSourceAndDestination(uint *dest,
-                                                               int length,
-                                                               uint color,
-                                                               uint const_alpha)
+void QT_FASTCALL rasterop_solid_NotSourceAndDestination(uint *dest,
+                                                        int length,
+                                                        uint color,
+                                                        uint const_alpha)
 {
     Q_UNUSED(const_alpha);
     color = ~color | 0xff000000;
@@ -2997,10 +2997,10 @@ void QT_FASTCALL rasterop_NotSourceAndDestination(uint *dest,
     }
 }
 
-static void QT_FASTCALL rasterop_solid_SourceAndNotDestination(uint *dest,
-                                                               int length,
-                                                               uint color,
-                                                               uint const_alpha)
+void QT_FASTCALL rasterop_solid_SourceAndNotDestination(uint *dest,
+                                                        int length,
+                                                        uint color,
+                                                        uint const_alpha)
 {
     Q_UNUSED(const_alpha);
     while (length--) {
@@ -7739,6 +7739,55 @@ void qInitDrawhelperAsm()
 
 #ifdef QT_HAVE_SSE
     if (features & SSE) {
+        extern void qt_blend_rgb32_on_rgb32_sse(uchar *destPixels, int dbpl,
+                                                const uchar *srcPixels, int sbpl,
+                                                int w, int h,
+                                                int const_alpha);
+        extern void qt_blend_argb32_on_argb32_sse(uchar *destPixels, int dbpl,
+                                                  const uchar *srcPixels, int sbpl,
+                                                  int w, int h,
+                                                  int const_alpha);
+
+        qBlendFunctions[QImage::Format_RGB32][QImage::Format_RGB32] = qt_blend_rgb32_on_rgb32_sse;
+        qBlendFunctions[QImage::Format_ARGB32_Premultiplied][QImage::Format_RGB32] = qt_blend_rgb32_on_rgb32_sse;
+        qBlendFunctions[QImage::Format_RGB32][QImage::Format_ARGB32_Premultiplied] = qt_blend_argb32_on_argb32_sse;
+        qBlendFunctions[QImage::Format_ARGB32_Premultiplied][QImage::Format_ARGB32_Premultiplied] = qt_blend_argb32_on_argb32_sse;
+    }
+#endif // SSE
+
+#ifdef QT_HAVE_SSE2
+    if (features & SSE2) {
+        extern void qt_blend_rgb32_on_rgb32_sse2(uchar *destPixels, int dbpl,
+                                                 const uchar *srcPixels, int sbpl,
+                                                 int w, int h,
+                                                 int const_alpha);
+        extern void qt_blend_argb32_on_argb32_sse2(uchar *destPixels, int dbpl,
+                                                   const uchar *srcPixels, int sbpl,
+                                                   int w, int h,
+                                                   int const_alpha);
+
+        qBlendFunctions[QImage::Format_RGB32][QImage::Format_RGB32] = qt_blend_rgb32_on_rgb32_sse2;
+        qBlendFunctions[QImage::Format_ARGB32_Premultiplied][QImage::Format_RGB32] = qt_blend_rgb32_on_rgb32_sse2;
+        qBlendFunctions[QImage::Format_RGB32][QImage::Format_ARGB32_Premultiplied] = qt_blend_argb32_on_argb32_sse2;
+        qBlendFunctions[QImage::Format_ARGB32_Premultiplied][QImage::Format_ARGB32_Premultiplied] = qt_blend_argb32_on_argb32_sse2;
+    }
+
+#ifdef QT_HAVE_SSSE3
+    if (features & SSSE3) {
+        extern void qt_blend_argb32_on_argb32_ssse3(uchar *destPixels, int dbpl,
+                                                    const uchar *srcPixels, int sbpl,
+                                                    int w, int h,
+                                                    int const_alpha);
+
+        qBlendFunctions[QImage::Format_RGB32][QImage::Format_ARGB32_Premultiplied] = qt_blend_argb32_on_argb32_ssse3;
+        qBlendFunctions[QImage::Format_ARGB32_Premultiplied][QImage::Format_ARGB32_Premultiplied] = qt_blend_argb32_on_argb32_ssse3;
+    }
+#endif // SSSE3
+
+#endif // SSE2
+
+#ifdef QT_HAVE_SSE
+    if (features & SSE) {
         functionForModeAsm = qt_functionForMode_SSE;
         functionForModeSolidAsm = qt_functionForModeSolid_SSE;
         qDrawHelper[QImage::Format_ARGB32_Premultiplied].blendColor = qt_blend_color_argb_sse;
@@ -7754,9 +7803,9 @@ void qInitDrawhelperAsm()
 #ifdef QT_HAVE_SSE2
         if (features & SSE2) {
             extern void QT_FASTCALL comp_func_SourceOver_sse2(uint *destPixels,
-                                                  const uint *srcPixels,
-                                                  int length,
-                                                  uint const_alpha);
+                                                              const uint *srcPixels,
+                                                              int length,
+                                                              uint const_alpha);
             extern void QT_FASTCALL comp_func_solid_SourceOver_sse2(uint *destPixels, int length, uint color, uint const_alpha);
             extern void QT_FASTCALL comp_func_Plus_sse2(uint *dst, const uint *src, int length, uint const_alpha);
             extern void QT_FASTCALL comp_func_Source_sse2(uint *dst, const uint *src, int length, uint const_alpha);
@@ -7765,51 +7814,16 @@ void qInitDrawhelperAsm()
             functionForModeAsm[QPainter::CompositionMode_Source] = comp_func_Source_sse2;
             functionForModeAsm[QPainter::CompositionMode_Plus] = comp_func_Plus_sse2;
             functionForModeSolidAsm[0] = comp_func_solid_SourceOver_sse2;
-
-            extern void qt_blend_rgb32_on_rgb32_sse2(uchar *destPixels, int dbpl,
-                                                     const uchar *srcPixels, int sbpl,
-                                                     int w, int h,
-                                                     int const_alpha);
-            extern void qt_blend_argb32_on_argb32_sse2(uchar *destPixels, int dbpl,
-                                                       const uchar *srcPixels, int sbpl,
-                                                       int w, int h,
-                                                       int const_alpha);
-
-            qBlendFunctions[QImage::Format_RGB32][QImage::Format_RGB32] = qt_blend_rgb32_on_rgb32_sse2;
-            qBlendFunctions[QImage::Format_ARGB32_Premultiplied][QImage::Format_RGB32] = qt_blend_rgb32_on_rgb32_sse2;
-            qBlendFunctions[QImage::Format_RGB32][QImage::Format_ARGB32_Premultiplied] = qt_blend_argb32_on_argb32_sse2;
-            qBlendFunctions[QImage::Format_ARGB32_Premultiplied][QImage::Format_ARGB32_Premultiplied] = qt_blend_argb32_on_argb32_sse2;
-
-#if defined(QT_HAVE_SSSE3)
-            if (features & SSSE3) {
-                extern void qt_blend_argb32_on_argb32_ssse3(uchar *destPixels, int dbpl,
-                                                            const uchar *srcPixels, int sbpl,
-                                                            int w, int h,
-                                                            int const_alpha);
-                qBlendFunctions[QImage::Format_RGB32][QImage::Format_ARGB32_Premultiplied] = qt_blend_argb32_on_argb32_ssse3;
-                qBlendFunctions[QImage::Format_ARGB32_Premultiplied][QImage::Format_ARGB32_Premultiplied] = qt_blend_argb32_on_argb32_ssse3;
-            }
-#endif // QT_HAVE_SSSE3
-        } else
-#endif
-        {
-            extern void qt_blend_rgb32_on_rgb32_sse(uchar *destPixels, int dbpl,
-                                                    const uchar *srcPixels, int sbpl,
-                                                    int w, int h,
-                                                    int const_alpha);
-            extern void qt_blend_argb32_on_argb32_sse(uchar *destPixels, int dbpl,
-                                                      const uchar *srcPixels, int sbpl,
-                                                      int w, int h,
-                                                      int const_alpha);
-
-
-            qBlendFunctions[QImage::Format_RGB32][QImage::Format_RGB32] = qt_blend_rgb32_on_rgb32_sse;
-            qBlendFunctions[QImage::Format_ARGB32_Premultiplied][QImage::Format_RGB32] = qt_blend_rgb32_on_rgb32_sse;
-            qBlendFunctions[QImage::Format_RGB32][QImage::Format_ARGB32_Premultiplied] = qt_blend_argb32_on_argb32_sse;
-            qBlendFunctions[QImage::Format_ARGB32_Premultiplied][QImage::Format_ARGB32_Premultiplied] = qt_blend_argb32_on_argb32_sse;
         }
-}
-#endif // SSE
+#endif
+    }
+#elif defined(QT_HAVE_SSE2)
+    // this is the special case when SSE2 is usable but MMX/SSE is not usable (e.g.: Windows x64 + visual studio)
+    if (features & SSE2) {
+        functionForModeAsm = qt_functionForMode_onlySSE2;
+        functionForModeSolidAsm = qt_functionForModeSolid_onlySSE2;
+    }
+#endif
 
 #ifdef QT_HAVE_IWMMXT
     if (features & IWMMXT) {
diff --git a/src/gui/painting/qdrawhelper_p.h b/src/gui/painting/qdrawhelper_p.h
index 5747da5..0cc2e40 100644
--- a/src/gui/painting/qdrawhelper_p.h
+++ b/src/gui/painting/qdrawhelper_p.h
@@ -1997,6 +1997,41 @@ void QT_FASTCALL rasterop_NotSource(uint *dest, const uint *src, int length, uin
 void QT_FASTCALL rasterop_NotSourceAndDestination(uint *dest, const uint *src, int length, uint const_alpha);
 void QT_FASTCALL rasterop_SourceAndNotDestination(uint *dest, const uint *src, int length, uint const_alpha);
 
+// prototypes of all the solid composition functions
+void QT_FASTCALL comp_func_solid_SourceOver(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL comp_func_solid_DestinationOver(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL comp_func_solid_Clear(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL comp_func_solid_Source(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL comp_func_solid_Destination(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL comp_func_solid_SourceIn(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL comp_func_solid_DestinationIn(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL comp_func_solid_SourceOut(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL comp_func_solid_DestinationOut(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL comp_func_solid_SourceAtop(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL comp_func_solid_DestinationAtop(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL comp_func_solid_XOR(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL comp_func_solid_Plus(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL comp_func_solid_Multiply(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL comp_func_solid_Screen(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL comp_func_solid_Overlay(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL comp_func_solid_Darken(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL comp_func_solid_Lighten(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL comp_func_solid_ColorDodge(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL comp_func_solid_ColorBurn(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL comp_func_solid_HardLight(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL comp_func_solid_SoftLight(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL comp_func_solid_Difference(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL comp_func_solid_Exclusion(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL rasterop_solid_SourceOrDestination(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL rasterop_solid_SourceAndDestination(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL rasterop_solid_SourceXorDestination(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL rasterop_solid_NotSourceAndNotDestination(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL rasterop_solid_NotSourceOrNotDestination(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL rasterop_solid_NotSourceXorDestination(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL rasterop_solid_NotSource(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL rasterop_solid_NotSourceAndDestination(uint *dest, int length, uint color, uint const_alpha);
+void QT_FASTCALL rasterop_solid_SourceAndNotDestination(uint *dest, int length, uint color, uint const_alpha);
+
 QT_END_NAMESPACE
 
 #endif // QDRAWHELPER_P_H
diff --git a/src/gui/painting/qdrawhelper_sse2.cpp b/src/gui/painting/qdrawhelper_sse2.cpp
index 5b674b5..ba2ba32 100644
--- a/src/gui/painting/qdrawhelper_sse2.cpp
+++ b/src/gui/painting/qdrawhelper_sse2.cpp
@@ -311,6 +311,78 @@ void QT_FASTCALL comp_func_solid_SourceOver_sse2(uint *destPixels, int length, u
     }
 }
 
+CompositionFunctionSolid qt_functionForModeSolid_onlySSE2[numCompositionFunctions] = {
+    comp_func_solid_SourceOver_sse2,
+    comp_func_solid_DestinationOver,
+    comp_func_solid_Clear,
+    comp_func_solid_Source,
+    comp_func_solid_Destination,
+    comp_func_solid_SourceIn,
+    comp_func_solid_DestinationIn,
+    comp_func_solid_SourceOut,
+    comp_func_solid_DestinationOut,
+    comp_func_solid_SourceAtop,
+    comp_func_solid_DestinationAtop,
+    comp_func_solid_XOR,
+    comp_func_solid_Plus,
+    comp_func_solid_Multiply,
+    comp_func_solid_Screen,
+    comp_func_solid_Overlay,
+    comp_func_solid_Darken,
+    comp_func_solid_Lighten,
+    comp_func_solid_ColorDodge,
+    comp_func_solid_ColorBurn,
+    comp_func_solid_HardLight,
+    comp_func_solid_SoftLight,
+    comp_func_solid_Difference,
+    comp_func_solid_Exclusion,
+    rasterop_solid_SourceOrDestination,
+    rasterop_solid_SourceAndDestination,
+    rasterop_solid_SourceXorDestination,
+    rasterop_solid_NotSourceAndNotDestination,
+    rasterop_solid_NotSourceOrNotDestination,
+    rasterop_solid_NotSourceXorDestination,
+    rasterop_solid_NotSource,
+    rasterop_solid_NotSourceAndDestination,
+    rasterop_solid_SourceAndNotDestination
+};
+
+CompositionFunction qt_functionForMode_onlySSE2[numCompositionFunctions] = {
+    comp_func_SourceOver_sse2,
+    comp_func_DestinationOver,
+    comp_func_Clear,
+    comp_func_Source_sse2,
+    comp_func_Destination,
+    comp_func_SourceIn,
+    comp_func_DestinationIn,
+    comp_func_SourceOut,
+    comp_func_DestinationOut,
+    comp_func_SourceAtop,
+    comp_func_DestinationAtop,
+    comp_func_XOR,
+    comp_func_Plus_sse2,
+    comp_func_Multiply,
+    comp_func_Screen,
+    comp_func_Overlay,
+    comp_func_Darken,
+    comp_func_Lighten,
+    comp_func_ColorDodge,
+    comp_func_ColorBurn,
+    comp_func_HardLight,
+    comp_func_SoftLight,
+    comp_func_Difference,
+    comp_func_Exclusion,
+    rasterop_SourceOrDestination,
+    rasterop_SourceAndDestination,
+    rasterop_SourceXorDestination,
+    rasterop_NotSourceAndNotDestination,
+    rasterop_NotSourceOrNotDestination,
+    rasterop_NotSourceXorDestination,
+    rasterop_NotSource,
+    rasterop_NotSourceAndDestination,
+    rasterop_SourceAndNotDestination
+};
+
 void qt_memfill16_sse2(quint16 *dest, quint16 value, int count)
 {
     if (count < 3) {
diff --git a/src/gui/painting/qdrawhelper_x86_p.h b/src/gui/painting/qdrawhelper_x86_p.h
index d7282a7..09ccd77 100644
--- a/src/gui/painting/qdrawhelper_x86_p.h
+++ b/src/gui/painting/qdrawhelper_x86_p.h
@@ -122,6 +122,9 @@ void qt_blend_rgb32_on_rgb32_sse2(uchar *destPixels, int dbpl,
                                  const uchar *srcPixels, int sbpl,
                                  int w, int h,
                                  int const_alpha);
+
+extern CompositionFunction qt_functionForMode_onlySSE2[];
+extern CompositionFunctionSolid qt_functionForModeSolid_onlySSE2[];
 #endif // QT_HAVE_SSE2
 
 #ifdef QT_HAVE_IWMMXT