On Fri, Feb 03, 2017 at 04:19:58PM +0000, Ramana Radhakrishnan wrote:
> > > Would it be acceptable for those users to have loads that perform like
> > > CAS loops, especially under contention? Or are these users more
> > > concerned about aarch64 not offering a true atomic 16-byte load?
> >
> > Can the store you need for atomicity be into an automatic var on the stack?
>
> No, it has to be to the same location.
But then it is the same problem as using cmpxchg16b on x86_64, the location
could be read-only, or that it is too slow otherwise for what users expect
for atomic load.
Jakub
