path: root/tools
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authorThiago Macieira <>2011-12-29 18:09:46 -0200
committerQt by Nokia <>2012-03-28 14:54:12 +0200
commitd43fe0b672a665fc366f7d4a91a522959801165d (patch)
tree07ef87adf783aea20725597f8732c2bc0b037f65 /tools
parentd2b1c2ef1f1fea3200d8dee5c58fe79649fd13bb (diff)
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 <>
Diffstat (limited to 'tools')
0 files changed, 0 insertions, 0 deletions