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another instruction less in decode_significance_x86() -> 1% faster ion P3 

Originally committed as revision 6745 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2006-10-20 10:00:28 +00:00
parent 942f3bb528
commit 849a50041c
1 changed files with 2 additions and 3 deletions
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5
libavcodec/cabac.h
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@ -676,7 +676,7 @@ static always_inline int get_cabac_bypass_sign(CABACContext *c, int val){
static int decode_significance_x86(CABACContext *c, int max_coeff, uint8_t *significant_coeff_ctx_base, int *index){
void *end= significant_coeff_ctx_base + max_coeff - 1;
int minusstart= -(int)significant_coeff_ctx_base;
int minusindex= -(int)index;
int minusindex= 4-(int)index;
int coeff_count;
asm volatile(
"movl "RANGE "(%3), %%esi \n\t"
@ -695,11 +695,11 @@ static int decode_significance_x86(CABACContext *c, int max_coeff, uint8_t *sign
"movl %4, %%ecx \n\t"
"addl %1, %%ecx \n\t"
"movl %%ecx, (%%eax) \n\t"
"addl $4, %%eax \n\t"
"test $1, %%edx \n\t"
" jnz 4f \n\t"
"addl $4, %%eax \n\t"
"movl %%eax, %2 \n\t"
"3: \n\t"
@ -710,7 +710,6 @@ static int decode_significance_x86(CABACContext *c, int max_coeff, uint8_t *sign
"movl %4, %%ecx \n\t"
"addl %1, %%ecx \n\t"
"movl %%ecx, (%%eax) \n\t"
"addl $4, %%eax \n\t"
"4: \n\t"
"addl %6, %%eax \n\t"
"shr $2, %%eax \n\t"