[x264-devel] commit: Fix x264_clz on inputs > 1<<31 (Loren Merritt )
git version control
git at videolan.org
Thu Jan 14 04:05:52 CET 2010
x264 | branch: master | Loren Merritt <pengvado at akuvian.org> | Thu Jan 14 03:07:30 2010 +0000| [b9823cafed9e0cbc887e5fbc27b78a892cb43de1] | committer: Loren Merritt
Fix x264_clz on inputs > 1<<31
(though x264 never generates such inputs)
> http://git.videolan.org/gitweb.cgi/x264.git/?a=commit;h=b9823cafed9e0cbc887e5fbc27b78a892cb43de1
---
common/osdep.h | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/common/osdep.h b/common/osdep.h
index 14f06a8..0c8623e 100644
--- a/common/osdep.h
+++ b/common/osdep.h
@@ -203,7 +203,7 @@ static ALWAYS_INLINE uint16_t endian_fix16( uint16_t x )
static int ALWAYS_INLINE x264_clz( uint32_t x )
{
static uint8_t lut[16] = {4,3,2,2,1,1,1,1,0,0,0,0,0,0,0,0};
- int y, z = ((x - 0x10000) >> 27) & 16;
+ int y, z = (((x >> 16) - 1) >> 27) & 16;
x >>= z^16;
z += y = ((x - 0x100) >> 28) & 8;
x >>= y^8;
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