On Fri, 21 Jul 2023, Xi Ruoyao wrote:

> > See also PR 99903 for an earlier known issue which appears due to x87
> > excess precision and so tweaking -ffp-contract wouldn't help:
> > 
> >   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99903
> 
> Does it affect AArch64 too?

Well, not literally (AArch64 doesn't have excess precision), but absence
of intermediate rounding in FMA is similar to excess precision.

I'm saying it's the same issue manifesting via different pathways on x86
and aarch64. Sorry if I misunderstood your question.

Alexander