https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70814
--- Comment #10 from Richard Earnshaw <rearnsha at gcc dot gnu.org> --- (In reply to Andrew Pinski from comment #9) > On x86, they use ifuncs for this purpose inside libatomic. Basically the > requirement is only one libatomic can be used at a time. If we can guarantee that, then yes, we could do something similar if we had fully atomic 128-bit loads.
