https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104233
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> --- I think testing __FLT128_IS_IEC_60559__ next to it is fine too, if __float128 and _Float128 exists, they are on all supported targets the same IEEE quad types, just _Generic doesn't treat them as the same type.
