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authorDale Curtis <dalecurtis@chromium.org>2017-10-24 13:03:59 -0700
committerMichael Niedermayer <michael@niedermayer.cc>2017-10-25 21:50:37 +0200
commit50e30d9bb71e1dff27be16c264fac90e362b9896 (patch)
tree74a3a214316ef50b591d85f4524d900f8fc67c5d /tests/ref/fate/filter-scale500
parent953d55f4439ba3a302f9dcc83f8fe9577c22b804 (diff)
downloadffmpeg-50e30d9bb71e1dff27be16c264fac90e362b9896.tar.gz
Don't use _tzcnt instrinics with clang for windows w/o BMI.
Technically _tzcnt* intrinsics are only available when the BMI instruction set is present. However the instruction encoding degrades to "rep bsf" on older processors. Clang for Windows debatably restricts the _tzcnt* instrinics behind the __BMI__ architecture define, so check for its presence or exclude the usage of these intrinics when clang is present. See also: https://ffmpeg.org/pipermail/ffmpeg-devel/2015-November/183404.html https://bugs.llvm.org/show_bug.cgi?id=30506 http://lists.llvm.org/pipermail/cfe-dev/2016-October/051034.html Signed-off-by: Dale Curtis <dalecurtis@chromium.org> Reviewed-by: Matt Oliver <protogonoi@gmail.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'tests/ref/fate/filter-scale500')
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