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| author | Ronald S. Bultje <rsbultje@gmail.com> | 2016-10-14 13:01:27 -0400 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2016-12-05 18:29:12 +0100 |
| commit | 2dcc0bce3924ebc96ed7f4956b007d4b84a99750 (patch) | |
| tree | 510ecc59c3f69e910e4923ee45198dc2c1dc2368 /libavcodec/dxva2_mpeg2.c | |
| parent | 0e3dc45ce81f9c9db5a6a6e2df96670164e82dec (diff) | |
| download | ffmpeg-2dcc0bce3924ebc96ed7f4956b007d4b84a99750.tar.gz | |
vp9: change order of operations in adapt_prob().
This is intended to workaround bug "665 Integer Divide Instruction May
Cause Unpredictable Behavior" on some early AMD CPUs, which causes a
div-by-zero in this codepath, such as reported in Mozilla bug #1293996.
Note that this isn't guaranteed to fix the bug, since a compiler is free
to reorder instructions that don't depend on each other. However, it
appears to fix the bug in Firefox, and a similar patch was applied to
libvpx also (see Chrome bug #599899).
(cherry picked from commit be885da3427c5d9a6fa68229d16318afffe67193)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/dxva2_mpeg2.c')
0 files changed, 0 insertions, 0 deletions