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| author | Michael Niedermayer <michaelni@gmx.at> | 2006-10-11 16:11:41 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2006-10-11 16:11:41 +0000 |
| commit | b99f3cabeddf98264fd73fd6757255220651ce62 (patch) | |
| tree | d92845f057b363fda60cb80164f7c82ede014047 | |
| parent | d17faef011c99e92a88f70d22eb2bbc9d4aa1f2c (diff) | |
| download | ffmpeg-b99f3cabeddf98264fd73fd6757255220651ce62.tar.gz | |
write cabac low and range variables as early as possible to prevent stalls from reading them before they where written, the P4 is said to disslike that alot, on P3 its 2% faster (START/STOP_TIMER over decode_residual)
Originally committed as revision 6657 to svn://svn.ffmpeg.org/ffmpeg/trunk
| -rw-r--r-- | libavcodec/cabac.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/libavcodec/cabac.h b/libavcodec/cabac.h index c852aa539d..473e7cf84a 100644 --- a/libavcodec/cabac.h +++ b/libavcodec/cabac.h @@ -478,8 +478,10 @@ static int get_cabac(CABACContext *c, uint8_t * const state){ "shr $19, %%esi \n\t" "movzbl " MANGLE(ff_h264_norm_shift) "(%%esi), %%ecx \n\t" - "shll %%cl, %%ebx \n\t" "shll %%cl, %%edx \n\t" + "movl %%edx, "RANGE "(%2) \n\t" + "shll %%cl, %%ebx \n\t" + "movl %%ebx, "LOW "(%2) \n\t" "test %%bx, %%bx \n\t" " jnz 1f \n\t" @@ -500,9 +502,8 @@ static int get_cabac(CABACContext *c, uint8_t * const state){ "shll %%cl , %%esi \n\t" "addl %%esi, %%ebx \n\t" - "1: \n\t" - "movl %%edx, "RANGE "(%2) \n\t" "movl %%ebx, "LOW "(%2) \n\t" + "1: \n\t" :"=&a"(bit) :"r"(state), "r"(c) : "%ecx", "%ebx", "%edx", "%esi" |