[SCM] libav/experimental: simplify asm mid_pred, as suggested by michaelni.
siretart at users.alioth.debian.org
siretart at users.alioth.debian.org
Sun Jun 30 15:50:58 UTC 2013
The following commit has been merged in the experimental branch:
commit 7e611a0e8ce978f8481531eb4f6988b19fabf5c5
Author: Loren Merritt <lorenm at u.washington.edu>
Date: Thu Sep 21 17:48:45 2006 +0000
simplify asm mid_pred, as suggested by michaelni.
Originally committed as revision 6314 to svn://svn.ffmpeg.org/ffmpeg/trunk
diff --git a/libavutil/common.h b/libavutil/common.h
index c9bdd56..31142b9 100644
--- a/libavutil/common.h
+++ b/libavutil/common.h
@@ -236,18 +236,17 @@ static inline int av_log2_16bit(unsigned int v)
static inline int mid_pred(int a, int b, int c)
{
#if (defined(ARCH_X86) && __CPU__ >= 686 || defined(ARCH_X86_64)) && !defined(RUNTIME_CPUDETECT)
- int i=a, j=a;
+ int i=b;
asm volatile(
- "cmp %4, %2 \n\t"
- "cmovg %4, %0 \n\t"
- "cmovl %4, %1 \n\t"
- "cmp %4, %3 \n\t"
- "cmovg %3, %0 \n\t"
+ "cmp %2, %1 \n\t"
+ "cmovg %1, %0 \n\t"
+ "cmovg %2, %1 \n\t"
+ "cmp %3, %1 \n\t"
"cmovl %3, %1 \n\t"
- "cmp %3, %2 \n\t"
- "cmovl %1, %0 \n\t"
- :"+&r"(i), "+&r"(j)
- :"r"(a), "r"(b), "r"(c)
+ "cmp %1, %0 \n\t"
+ "cmovg %1, %0 \n\t"
+ :"+&r"(i), "+&r"(a)
+ :"r"(b), "r"(c)
);
return i;
#elif 0
--
Libav/FFmpeg packaging
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