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Code Issues Releases Activity

h264: use struct offsets in get_cabac_bypass_sign_x86().

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This commit is contained in:
Ronald S. Bultje 2012-03-16 22:41:17 -07:00
parent 7374fac804
commit db025929f2
1 changed files with 11 additions and 8 deletions
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19
libavcodec/x86/cabac.h
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@ -105,8 +105,8 @@ static av_always_inline int get_cabac_bypass_sign_x86(CABACContext *c, int val)
{
x86_reg tmp;
__asm__ volatile(
"movl %4, %k1 \n\t"
"movl %2, %%eax \n\t"
"movl %a5(%2), %k1 \n\t"
"movl %a3(%2), %%eax \n\t"
"shl $17, %k1 \n\t"
"add %%eax, %%eax \n\t"
"sub %k1, %%eax \n\t"
@ -117,20 +117,23 @@ static av_always_inline int get_cabac_bypass_sign_x86(CABACContext *c, int val)
"sub %%edx, %%ecx \n\t"
"test %%ax, %%ax \n\t"
" jnz 1f \n\t"
"mov %3, %1 \n\t"
"mov %a4(%2), %1 \n\t"
"subl $0xFFFF, %%eax \n\t"
"movzwl (%1), %%edx \n\t"
"bswap %%edx \n\t"
"shrl $15, %%edx \n\t"
"add $2, %1 \n\t"
"addl %%edx, %%eax \n\t"
"mov %1, %3 \n\t"
"mov %1, %a4(%2) \n\t"
"1: \n\t"
"movl %%eax, %2 \n\t"
"movl %%eax, %a3(%2) \n\t"
:"+c"(val), "=&r"(tmp), "+m"(c->low), "+m"(c->bytestream)
:"m"(c->range)
: "%eax", "%edx"
: "+c"(val), "=&r"(tmp)
: "r"(c),
"i"(offsetof(CABACContext, low)),
"i"(offsetof(CABACContext, bytestream)),
"i"(offsetof(CABACContext, range))
: "%eax", "%edx", "memory"
);
return val;
}