Implement the general blending of ARGB32_pm with SSSE3

SSSE3 provides two tools to improve the blending speed over SSE2:
-palignr
-byte permutation

The alignement is enforced on src and dst with palignr to always make
aligned access.
The extraction of the alpha mask is done with a byte permutation in
order to save two instructions per cycle.

On Atom, this patch gives between 0% (aligned src) to 10% of
improvement (unaligned 4 and 12 bytes).

On Core 2, this patch gives consistently 8% to 10% of improvement
for every miss-alignment.

Reviewed-by: Samuel Rødal

1 files changed, 1 insertions, 0 deletions

diff --git a/src/gui/painting/painting.pri b/src/gui/painting/painting.pri
index dfa4a48..793d380 100644
--- a/src/gui/painting/painting.pri
+++ b/src/gui/painting/painting.pri
@@ -212,6 +212,7 @@ if(mmx|3dnow|sse|sse2|iwmmxt) {
     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
 }