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| author | Michael Niedermayer <michael@niedermayer.cc> | 2015-11-08 13:59:21 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2015-11-11 23:32:54 +0100 |
| commit | acd203fc0d31d65d2aeac00a3f35cb06bb3bac57 (patch) | |
| tree | 5300aacb4045f765bce38ca12fb459a499b978e8 | |
| parent | 402c4a9f81de2c2329b6de4a0fb991253e098cbc (diff) | |
| download | ffmpeg-acd203fc0d31d65d2aeac00a3f35cb06bb3bac57.tar.gz | |
avutil/softfloat: Fix exponent underflow in av_div_sf()
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 046218b212a076b92ed88a280457db871dafd377)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavutil/softfloat.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/libavutil/softfloat.h b/libavutil/softfloat.h index e47420e999..e5bfbbdfc6 100644 --- a/libavutil/softfloat.h +++ b/libavutil/softfloat.h @@ -111,7 +111,10 @@ static inline av_const SoftFloat av_mul_sf(SoftFloat a, SoftFloat b){ static inline av_const SoftFloat av_div_sf(SoftFloat a, SoftFloat b){ a.exp -= b.exp; a.mant = ((int64_t)a.mant<<(ONE_BITS+1)) / b.mant; - return av_normalize1_sf(a); + a = av_normalize1_sf(a); + if (!a.mant || a.exp < MIN_EXP) + return FLOAT_0; + return a; } static inline av_const int av_cmp_sf(SoftFloat a, SoftFloat b){ |