[Bug target/97786] rs6000 isinf etc. are pretty horrible

[segher at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97786

--- Comment #9 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(Erm,tdc *is* 3.0, but setbc is 3.1, I can never ever get this right it seems! 
But
setb is 3.0).