https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70814
--- Comment #8 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #7)
> Closing as invalid. Though for v8.4 or so it would be nice if there was
> 128bit atomic loads.
That probably wouldn't help. It would require a new ABI before you could use
them, since all code has to swap to that mechanism. Iff you could guarantee
that an application had exactly one instance of __atomic_{load,store}_16 (ie
that it isn't a private function in each DSO component), then you *might* be
able to re-implement those routines using the new instructions, but otherwise
you're stuck with the requirement to retain backwards compatibility.
