This check will always disable AVX-512 on macOS, because they implemented on-demand support: https://github.com/apple/darwin-xnu/blob/0a798f6738bc1db01281fc08ae024145e84df927/osfmk/i386/fpu.c#L176
(I'm not against this change, just for information). 2018-03-29 16:05 GMT+03:00 Uros Bizjak <ubiz...@gmail.com>: > On Thu, Mar 29, 2018 at 2:43 PM, H.J. Lu <hongjiu...@intel.com> wrote: >> Enable AVX and AVX512 features only if their states are supported by >> OSXSAVE. -- Ilya
