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avutil/intmath: fix undefined behavior in ff_ctzll_c()

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2015-10-22 14:10:10 +02:00
parent cdfc61de4e
commit 00efaa7983
1 changed files with 1 additions and 1 deletions
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libavutil/intmath.h
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@ -131,7 +131,7 @@ static av_always_inline av_const int ff_ctzll_c(long long v)
63, 52, 6, 26, 37, 40, 33, 47, 61, 45, 43, 21, 23, 58, 17, 10, 63, 52, 6, 26, 37, 40, 33, 47, 61, 45, 43, 21, 23, 58, 17, 10,
51, 25, 36, 32, 60, 20, 57, 16, 50, 31, 19, 15, 30, 14, 13, 12 51, 25, 36, 32, 60, 20, 57, 16, 50, 31, 19, 15, 30, 14, 13, 12
}; };
return debruijn_ctz64[(uint64_t)((v & -v) * 0x022FDD63CC95386D) >> 58]; return debruijn_ctz64[(uint64_t)((v & -v) * 0x022FDD63CC95386DU) >> 58];
} }
#endif #endif