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

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

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

--- Comment #7 from Surya Kumari Jangala <jskumari at gcc dot gnu.org> ---
Hi Segher,

Thanks for the pointers!
We can optimize the code further and remove the branch completely.

For P10:

     xststdcdp 0,1,48
     setnbc 9,32
     setbc 3,34
     isel 3,9,3,2
     blr


For P9:
     xststdcdp 0,1,48
     setb 9,0
     mfcr 3,128
     rlwinm 3,3,3,1
     lr 4,1
     isel 9,9,4,0
     isel 3,9,3,2
     blr