[FFmpeg-cvslog] cpu detection: avoid a signed overflow
Sean McGovern
git at videolan.org
Sun Dec 25 01:35:59 CET 2011
ffmpeg | branch: release/0.6 | Sean McGovern <gseanmcg at gmail.com> | Mon Jul 25 18:51:02 2011 -0400| [4ccb8f5b7b99ebaab5032f0d1b2b42906e3a14c5] | committer: Reinhard Tartler
cpu detection: avoid a signed overflow
1<<31 overflows because 1 is signed, so force it to unsigned.
Signed-off-by: Ronald S. Bultje <rsbultje at gmail.com>
(cherry picked from commit 5938e02185430ca711106aaec9b5622dbf588af3)
Signed-off-by: Anton Khirnov <anton at khirnov.net>
Signed-off-by: Reinhard Tartler <siretart at tauware.de>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4ccb8f5b7b99ebaab5032f0d1b2b42906e3a14c5
---
libavcodec/x86/cpuid.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/libavcodec/x86/cpuid.c b/libavcodec/x86/cpuid.c
index 1ed4d2e..832b990 100644
--- a/libavcodec/x86/cpuid.c
+++ b/libavcodec/x86/cpuid.c
@@ -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;
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