[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



More information about the pkg-multimedia-commits mailing list