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| author | Ronald S. Bultje <rsbultje@gmail.com> | 2016-10-14 13:01:27 -0400 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2016-12-04 20:25:15 +0100 |
| commit | 642cd5de4de6c94877601078fad5474a45d36630 (patch) | |
| tree | 88466593c2199b739ab0e2ca8925c21d09a3e1b6 /libavcodec/mpeg12data.h | |
| parent | d54aa2de176119f49d3491be8b8fe7ad7848577f (diff) | |
| download | ffmpeg-642cd5de4de6c94877601078fad5474a45d36630.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/mpeg12data.h')
0 files changed, 0 insertions, 0 deletions