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

[segher at gcc dot gnu.org]

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

--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Yes, the __SIZEOF_* macros do not say whether some type can be used.  This is
true for all targets!

What would it be useful for to define these macros?  They all are equivalent to

#define SIXTEEN 16

:-)