[Ffmpeg-cvslog] r6657 - trunk/libavcodec/cabac.h

[michael]

Author: michael
Date: Wed Oct 11 18:11:41 2006
New Revision: 6657

Modified:
   trunk/libavcodec/cabac.h

Log:
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)


Modified: trunk/libavcodec/cabac.h
==============================================================================
--- trunk/libavcodec/cabac.h	(original)
+++ trunk/libavcodec/cabac.h	Wed Oct 11 18:11:41 2006
@@ -478,8 +478,10 @@
 
         "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 @@
 
         "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"