[Bug target/107590] __atomic_test_and_set broken on PowerPC

[iains at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107590

--- Comment #5 from Iain Sandoe <iains at gcc dot gnu.org> ---

I'm away from my usual sources of information but I'd suggest exploring the
possibility that someone has assumed that either the spinlock or a bool is
8bits; As far as my memory serves both are 32b on power darwin.