[PATCH 15/28] powerpc: Remove optimized isinf

[Gabriel F. T. Gomes]

On Fri, Mar 29 2019, Adhemerval Zanella wrote:
>
>   - The power7 uses ftdiv to optimize for some input pattern and branch
>     implementation for INF and denormal that does:
> 
>     return (ix & UINT64_C (0x7fffffffffffffff)) == UINT64_C (0x7ff0000000000000)
> 
>     Although it does show slight better latency than generic algorithm,
>     it is only for power7 and requires it to override it for power8.

Fair enough.

> 	* sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile usysdep_call):
                                                           ^
Typo................................................. here ^

> 	Likewise.
        ~~~~~~~~
"Remove s_isinf* objects"?

This patch looks good to me, provided we have the previous patch
(<https://sourceware.org/ml/libc-alpha/2019-03/msg00660.html>), or some
alternative implementation merged, as well.

Reviewed-by: Gabriel F. T. Gomes <gabrielftg@linux.ibm.com>