[Bug target/118280] [14/15 Regression] __atomic_test_and_set in Microblaze are broken (exposed by r14-4286)

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118280

--- Comment #10 from Sam James <sjames at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #9)
> So Microblaze backend has only atomic_compare_and_swapsi  but that in theory
> could be used to implement smaller size atomics.
> Plus microblaze ISA has LWX/SWX (which is like LL/SC on MIPS), so that can
> be used to implement a few other atomics.

yes, and we manage to make-do on hppa too.