https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80878
--- Comment #39 from Florian Weimer <fw at gcc dot gnu.org> --- (In reply to Jakub Jelinek from comment #38) > Please see PR104688 . We got a response from Intel, where they guaranteed > atomicity of certain 16-byte load instructions for Intel CPUs with AVX > support. > AFAIK we didn't get similar guarantee from AMD. I'm trying to work with AMD to get an official statement that covers older CPUs as well. I have a preliminary statement, but I hope to get to the point that we can say the rule is the same as for Intel (AVX support can act as a proxy).
