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| author | Jason Garrett-Glaser <darkshikari@gmail.com> | 2010-06-30 23:18:47 +0000 |
|---|---|---|
| committer | Jason Garrett-Glaser <darkshikari@gmail.com> | 2010-06-30 23:18:47 +0000 |
| commit | 36d6b545a1a5309b3d9223b0db40ad2879817af5 (patch) | |
| tree | 8ab9a00c790b8f413431e923be1a27beb4fa815c /doc | |
| parent | 2e6ed48d6e7525fceba5469e1512b20c7c5c3198 (diff) | |
| download | ffmpeg-36d6b545a1a5309b3d9223b0db40ad2879817af5.tar.gz | |
CMOV-ify vp56 arithcoder
This incantation causes gcc 4.3 to generate cmov on x86, a vastly better option
than a completely unpredictable branch.
Hopefully this carries over to newer versions and other CPUs with conditionals.
~5 cycles saved per call on a Core i7.
Originally committed as revision 23921 to svn://svn.ffmpeg.org/ffmpeg/trunk
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