Remove the old code using MMX registers.

There are only 8 MMX registers, each 64-bit wide, and they alias the
x87 registers. The access to the MMX register cannot use the new
VEX-prefix instructions either.

All of the functions being replaced are either present in the
qdrawhelper_sse2.cpp and qdrawhelper_ssse3.cpp files, or the plain C++
function in qdrawhelper.cpp is vectorised when compiled with
-ftree-vectorize (enabled in -O3), if SSE2 support is enabled.

All x86-64 processors have SSE2, so this is a net improvement for
64-bit builds. For 32-bit builds, without further support this will
cause the code to use non-vector or x87 instructions, which aren't the
best. The solution will come in another commit.

Change-Id: I4a22d8a2516b79172867510202d0fd627db54807
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>

1 files changed, 2 insertions, 50 deletions

diff --git a/src/gui/painting/qdrawhelper_x86_p.h b/src/gui/painting/qdrawhelper_x86_p.h
index ada0bec0e3..93abaf4fff 100644
--- a/src/gui/painting/qdrawhelper_x86_p.h
+++ b/src/gui/painting/qdrawhelper_x86_p.h
@@ -57,54 +57,6 @@
 
 QT_BEGIN_NAMESPACE
 
-#ifdef QT_HAVE_MMX
-extern CompositionFunction qt_functionForMode_MMX[];
-extern CompositionFunctionSolid qt_functionForModeSolid_MMX[];
-void qt_blend_color_argb_mmx(int count, const QSpan *spans, void *userData);
-#endif
-
-#ifdef QT_HAVE_MMXEXT
-void qt_memfill32_mmxext(quint32 *dest, quint32 value, int count);
-void qt_bitmapblit16_mmxext(QRasterBuffer *rasterBuffer, int x, int y,
-                            quint32 color, const uchar *src,
-                            int width, int height, int stride);
-#endif
-
-#ifdef QT_HAVE_3DNOW
-#if defined(QT_HAVE_MMX) || !defined(QT_HAVE_SSE)
-extern CompositionFunction qt_functionForMode_MMX3DNOW[];
-extern CompositionFunctionSolid qt_functionForModeSolid_MMX3DNOW[];
-
-void qt_blend_color_argb_mmx3dnow(int count, const QSpan *spans,
-                                  void *userData);
-#endif // MMX
-
-#ifdef QT_HAVE_SSE
-extern CompositionFunction qt_functionForMode_SSE3DNOW[];
-extern CompositionFunctionSolid qt_functionForModeSolid_SSE3DNOW[];
-
-void qt_memfill32_sse3dnow(quint32 *dest, quint32 value, int count);
-void qt_bitmapblit16_sse3dnow(QRasterBuffer *rasterBuffer, int x, int y,
-                              quint32 color,
-                              const uchar *src, int width, int height,
-                              int stride);
-void qt_blend_color_argb_sse3dnow(int count, const QSpan *spans,
-                                  void *userData);
-#endif // SSE
-#endif // QT_HAVE_3DNOW
-
-#ifdef QT_HAVE_SSE
-void qt_memfill32_sse(quint32 *dest, quint32 value, int count);
-void qt_bitmapblit16_sse(QRasterBuffer *rasterBuffer, int x, int y,
-                         quint32 color,
-                         const uchar *src, int width, int height, int stride);
-
-void qt_blend_color_argb_sse(int count, const QSpan *spans, void *userData);
-
-extern CompositionFunction qt_functionForMode_SSE[];
-extern CompositionFunctionSolid qt_functionForModeSolid_SSE[];
-#endif // QT_HAVE_SSE
-
 #ifdef QT_HAVE_SSE2
 void qt_memfill32_sse2(quint32 *dest, quint32 value, int count);
 void qt_memfill16_sse2(quint16 *dest, quint16 value, int count);
@@ -123,8 +75,8 @@ void qt_blend_rgb32_on_rgb32_sse2(uchar *destPixels, int dbpl,
                                  int w, int h,
                                  int const_alpha);
 
-extern CompositionFunction qt_functionForMode_onlySSE2[];
-extern CompositionFunctionSolid qt_functionForModeSolid_onlySSE2[];
+extern CompositionFunction qt_functionForMode_SSE2[];
+extern CompositionFunctionSolid qt_functionForModeSolid_SSE2[];
 #endif // QT_HAVE_SSE2
 
 #ifdef QT_HAVE_IWMMXT