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, 0 insertions, 6 deletions

diff --git a/src/gui/painting/painting.pri b/src/gui/painting/painting.pri
index 3ce2e5b258..0792343ce1 100644
--- a/src/gui/painting/painting.pri
+++ b/src/gui/painting/painting.pri
@@ -93,13 +93,7 @@ SOURCES += \
 
 if(mmx|3dnow|sse|sse2|iwmmxt) {
     HEADERS += painting/qdrawhelper_x86_p.h \
-               painting/qdrawhelper_mmx_p.h \
-               painting/qdrawhelper_sse_p.h \
                painting/qdrawingprimitive_sse2_p.h
-    MMX_SOURCES += painting/qdrawhelper_mmx.cpp
-    MMX3DNOW_SOURCES += painting/qdrawhelper_mmx3dnow.cpp
-    SSE3DNOW_SOURCES += painting/qdrawhelper_sse3dnow.cpp
-    SSE_SOURCES += painting/qdrawhelper_sse.cpp
     SSE2_SOURCES += painting/qdrawhelper_sse2.cpp
     SSSE3_SOURCES += painting/qdrawhelper_ssse3.cpp
     IWMMXT_SOURCES += painting/qdrawhelper_iwmmxt.cpp