[Bug target/104688] gcc and libatomic can use SSE for 128-bit atomic loads on Intel and AMD CPUs with AVX

[segher at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104688

--- Comment #29 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Florian Weimer from comment #28)
> Maybe this belongs in the ABI manual? For example, the POWER ABI says that
> memcpy needs to work on device memory.

Huh?!

Where do you see this?  The way you state it it is trivially impossible to
implement, so if we really say that it needs fixing asap.