[Bug target/127793] Relax _Float128 requirements from VSX to altivec on PowerPC

[tg at trevorgross dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127793

--- Comment #4 from Trevor Gross <tg at trevorgross dot com> ---
Yes the __ibm128 double-double.

Isn't mips long double binary128, or binary64 with o32?