On Thu, Oct 26, 2017 at 03:39:57AM +1100, Matt Oliver wrote: > On 25 October 2017 at 07:15, Dale Curtis <dalecur...@chromium.org> wrote: > > > 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 <dalecur...@chromium.org > > > LGTM
will apply thanks [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB When you are offended at any man's fault, turn to yourself and study your own failings. Then you will forget your anger. -- Epictetus
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