Re: [PATCH] libstdc++: Add missing constexpr to simd

[Marc Glisse via Gcc-patches]

On Mon, 22 May 2023, Jonathan Wakely via Libstdc++ wrote:

* subscripting vector builtins is not allowed in constant expressions

Is that just because nobody made it work (yet)?

Yes.

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101651 and others.

* if the implementation would otherwise call SIMD intrinsics/builtins

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80517 and others.

Makes sense to work around them for now.

--
Marc Glisse