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simplify asm mid_pred, as suggested by michaelni.

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Originally committed as revision 6314 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Loren Merritt 2006-09-21 17:48:45 +00:00
parent a4eb118a41
commit 7e611a0e8c
1 changed files with 9 additions and 10 deletions
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19
libavutil/common.h
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@ -236,18 +236,17 @@ static inline int av_log2_16bit(unsigned int v)
static inline int mid_pred(int a, int b, int c) static inline int mid_pred(int a, int b, int c)
{ {
#if (defined(ARCH_X86) && __CPU__ >= 686 || defined(ARCH_X86_64)) && !defined(RUNTIME_CPUDETECT) #if (defined(ARCH_X86) && __CPU__ >= 686 || defined(ARCH_X86_64)) && !defined(RUNTIME_CPUDETECT)
int i=a, j=a; int i=b;
asm volatile( asm volatile(
"cmp %4, %2 \n\t" "cmp %2, %1 \n\t"
"cmovg %4, %0 \n\t" "cmovg %1, %0 \n\t"
"cmovl %4, %1 \n\t" "cmovg %2, %1 \n\t"
"cmp %4, %3 \n\t" "cmp %3, %1 \n\t"
"cmovg %3, %0 \n\t"
"cmovl %3, %1 \n\t" "cmovl %3, %1 \n\t"
"cmp %3, %2 \n\t" "cmp %1, %0 \n\t"
"cmovl %1, %0 \n\t" "cmovg %1, %0 \n\t"
:"+&r"(i), "+&r"(j) :"+&r"(i), "+&r"(a)
:"r"(a), "r"(b), "r"(c) :"r"(b), "r"(c)
); );
return i; return i;
#elif 0 #elif 0