https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110061
--- Comment #14 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to Wilco from comment #13)
> (In reply to Xi Ruoyao from comment #12)
> > (In reply to Wilco from comment #11)
> >
> > > > Then the compiler (and the standard) is not what they consider. Such
> > > > misunderstandings are everywhere and this has no difference.
> > >
> > > Where is int128 in "the standard"?
> >
> > Consider this:
> >
> > const _Atomic long double x = 0.1;
> >
> > int main()
> > {
> > double y = x;
> > return y != 0.1;
> > }
> >
> > If CAS is used here, the program will just segfault. Does the standard say
> > this is ill-formed or not?
>
> I'd say this is ill formed yes. And it will crash on Atom laptops.
Correction - it crashes on all AMD cpus too. Are you going to file bugreports
for this?
