[Bug target/107456] std::atomic::fetch_xxx generate LOCK CMPXCHG instead of simpler LOCK instructions

[thiago at kde dot org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107456

--- Comment #4 from Thiago Macieira <thiago at kde dot org> ---
(In reply to Thiago Macieira from comment #3)
> With the Remote Atomic Operations (RAO) of AAND, AOR and AXOR, we can do
> something.

Correcting myself: the RAO instructions don't give us the result back either.