On Tue, Jul 23, 2019 at 07:52:09AM -0700, Andrew Lutomirski wrote: > Things like CMPXCHG16B that change the set of things that can be done on > the CPU. I could easily imagine programs that use algorithms that > fundamentally depend on CMPXCHG16B. There is no drop-in replacement. FWIW, CMPXCH16B is a hard requirement for Windows 8.1 (August 2013!) and beyond. In AMD-land, it seems that CMPXCHG16B support was added at the same time as they added SSE3 (ie April 2005). so requiring that would cut off the 1st-gen single-core x86_64 AMD parts) All non-AMD x86_64 parts support both CMPXCHG16B and SSE3. - Solomon -- Solomon Peachy pizza at shaftnet dot org High Springs, FL ^^ (email/xmpp) ^^ Quidquid latine dictum sit, altum videtur.
Attachment:
signature.asc
Description: PGP signature
_______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx
