Chiebot-Mirror
/
FFmpeg
mirror of https://github.com/FFmpeg/FFmpeg.git
8
0
Fork 0
Code Issues Projects Releases Wiki Activity

reordering instructions a little in decode_significance_x86() -> 2 instructions less / 1% faster decode_residual on P3

Browse Source 
Originally committed as revision 6741 to svn://svn.ffmpeg.org/ffmpeg/trunk
pull/126/head
Michael Niedermayer 19 years ago
parent 13404b2e98
commit a616db285a
1 changed files with 5 additions and 7 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Unified View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 12
      libavcodec/cabac.h

12
libavcodec/cabac.h
Unescape View File

@ -684,11 +684,13 @@ static int decode_significance_x86(CABACContext *c, int max_coeff, uint8_t *sign
"2: \n\t" "2: \n\t"
BRANCHLESS_GET_CABAC("%0", "%3", "(%1)", "%%ebx", "%%bx", "%%esi", "%%edx", "%%dl") BRANCHLESS_GET_CABAC("%%edx", "%3", "(%1)", "%%ebx", "%%bx", "%%esi", "%%eax", "%%al")
"test $1, %0 \n\t" "test $1, %%edx \n\t"
" jz 3f \n\t" " jz 3f \n\t"
BRANCHLESS_GET_CABAC("%%edx", "%3", "61(%1)", "%%ebx", "%%bx", "%%esi", "%%eax", "%%al")
"movl %2, %%eax \n\t" "movl %2, %%eax \n\t"
"movl %4, %%ecx \n\t" "movl %4, %%ecx \n\t"
"addl %1, %%ecx \n\t" "addl %1, %%ecx \n\t"
@ -696,9 +698,7 @@ static int decode_significance_x86(CABACContext *c, int max_coeff, uint8_t *sign
"addl $4, %%eax \n\t" "addl $4, %%eax \n\t"
"movl %%eax, %2 \n\t" "movl %%eax, %2 \n\t"
BRANCHLESS_GET_CABAC("%0", "%3", "61(%1)", "%%ebx", "%%bx", "%%esi", "%%edx", "%%dl") "test $1, %%edx \n\t"
"test $1, %%eax \n\t"
" jnz 4f \n\t" " jnz 4f \n\t"
"3: \n\t" "3: \n\t"
@ -710,9 +710,7 @@ static int decode_significance_x86(CABACContext *c, int max_coeff, uint8_t *sign
"addl %1, %%ecx \n\t" "addl %1, %%ecx \n\t"
"movl %%ecx, (%%eax) \n\t" "movl %%ecx, (%%eax) \n\t"
"addl $4, %%eax \n\t" "addl $4, %%eax \n\t"
"movl %%eax, %2 \n\t"
"4: \n\t" "4: \n\t"
"movl %2, %%eax \n\t"
"addl %6, %%eax \n\t" "addl %6, %%eax \n\t"
"shr $2, %%eax \n\t" "shr $2, %%eax \n\t"

Write Preview
Loading…
Cancel
Save