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| author | Michael Niedermayer <michaelni@gmx.at> | 2006-10-11 17:59:40 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2006-10-11 17:59:40 +0000 |
| commit | 1f4d5e9f69e84f4d6cd78e31909f547d4d698ed8 (patch) | |
| tree | 2f7086297cb4efde3b1a81f89e0ef05198d31cf3 /libavcodec/cabac.h | |
| parent | f3239539b997e9c6fbd9182f4109fa0941b7d7d1 (diff) | |
| download | ffmpeg-1f4d5e9f69e84f4d6cd78e31909f547d4d698ed8.tar.gz | |
slightly faster on P3 slightly slower on athlon and probably faster on P4
Originally committed as revision 6663 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/cabac.h')
| -rw-r--r-- | libavcodec/cabac.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/libavcodec/cabac.h b/libavcodec/cabac.h index ba2799311c..372123086a 100644 --- a/libavcodec/cabac.h +++ b/libavcodec/cabac.h @@ -382,10 +382,20 @@ static int get_cabac(CABACContext *c, uint8_t * const state){ "subl %%esi, %%edx \n\t" "cmpl %%edx, %%ebx \n\t" " ja 1f \n\t" + +#if 1 + //athlon:4067 P3:4110 + "lea -0x2000000(%%edx), %%ecx \n\t" + "shr $31, %%ecx \n\t" + "shl %%cl, %%edx \n\t" + "shl %%cl, %%ebx \n\t" +#else + //athlon:4057 P3:4130 "cmp $0x2000000, %%edx \n\t" //FIXME avoidable "setb %%cl \n\t" "shl %%cl, %%edx \n\t" "shl %%cl, %%ebx \n\t" +#endif "movzbl "MANGLE(ff_h264_mps_state)"(%%eax), %%ecx \n\t" "movb %%cl, (%1) \n\t" //eax:state ebx:low, edx:range, esi:RangeLPS |