[Bug target/99708] __SIZEOF_FLOAT128__ not defined on powerpc64le-linux

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99708

--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Perhaps another possible test could be
ieee128_float_type_node != ibm128_float_type_node
because whenever those two are different, we know __ieee128 and __ibm128 are
supported (but still need to verify whether __float128 macro is defined).