[PATCH, RFC] libstdc++: simd: accept 64-bit long double as double in _S_*_of [PR124657]

[Alexandre Oliva]

On May  5, 2026, Jonathan Wakely <jwakely@redhat.com> wrote:

> I don't think this is a good use of time.

> I would prefer to just add a static_assert to reject -mlong-double-64
> and say "don't do that, this isn't supported"

Ugh, that's exactly what we had two patches ago :-(

(now three, sorry about misnaming the macros, thanks for the fix)

Now it works; the only pending patch in this set was the attempt to
apply the same preprocessor test to simd.h, where I made the same
mistake.

I could fix it and resubmit it, but I get that the preference is to not
mess with it any further.

It's just a micro-optimization, and I'm not even sure it actually
optimizes anything, so I don't mind at all if we just drop it.  I'll
proceed accordingly.

Thanks!

-- 
Alexandre Oliva, happy hacker            https://blog.lx.oliva.nom.br/
Free Software Activist     FSFLA co-founder     GNU Toolchain Engineer
More tolerance and less prejudice are key for inclusion and diversity.
Excluding neuro-others for not behaving ""normal"" is *not* inclusive!