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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> |
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| .. | ||
| asm.h | ||
| bswap.h | ||
| cpu.c | ||
| cpu.h | ||
| cpuid.asm | ||
| emms.asm | ||
| emms.h | ||
| fixed_dsp.asm | ||
| fixed_dsp_init.c | ||
| float_dsp.asm | ||
| float_dsp_init.c | ||
| imgutils.asm | ||
| imgutils_init.c | ||
| intmath.h | ||
| intreadwrite.h | ||
| lls.asm | ||
| lls_init.c | ||
| Makefile | ||
| pixelutils.asm | ||
| pixelutils.h | ||
| pixelutils_init.c | ||
| timer.h | ||
| w64xmmtest.h | ||
| x86inc.asm | ||
| x86util.asm | ||