https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70934
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
They are implemented, you just have to make sure the variable you perform
atomic on is also sufficiently aligned.
a has only 8-byte alignment by default in the s390* ABI, which is not enough.
You need ti a __attribute__((aligned (16))); or something similar.
