cpu detection: avoid a signed overflow
authorSean McGovern <gseanmcg@gmail.com>
Mon, 25 Jul 2011 22:51:02 +0000 (18:51 -0400)
committerReinhard Tartler <siretart@tauware.de>
Sat, 24 Dec 2011 11:20:32 +0000 (12:20 +0100)
1<<31 overflows because 1 is signed, so force it to unsigned.

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
(cherry picked from commit 5938e02185430ca711106aaec9b5622dbf588af3)

Signed-off-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: Reinhard Tartler <siretart@tauware.de>
libavcodec/x86/cpuid.c

index 1ed4d2e..832b990 100644 (file)
@@ -98,7 +98,7 @@ int mm_support(void)
 
     if(max_ext_level >= 0x80000001){
         cpuid(0x80000001, eax, ebx, ecx, ext_caps);
-        if (ext_caps & (1<<31))
+        if (ext_caps & (1U<<31))
             rval |= FF_MM_3DNOW;
         if (ext_caps & (1<<30))
             rval |= FF_MM_3DNOWEXT;