[PATCH] powerpc: Cleanup fenv_private.h

[Tulio Magno Quites Machado Filho]

"Paul E. Murphy" <murphyp@linux.vnet.ibm.com> writes:

> Tested on ppc64le, with results before and after.
>
> ---8<---
> Some of the masks are wrong, and the naming is confusing.
>
> There are two basic cases we really care about:
>
> 1. Stacking a new rounding mode when running certain
>    sections of code, and pausing exception handling.
>
> 2. Likewise, but discarding any exceptions which occur
>    while running under the new rounding mode.
>
> libc_feholdexcept_setround_ppc_ctx has been removed as it basically
> does the same thing as libc_feholdsetround_ppc_ctx but also clearing
> any sticky bits.  The restore behavior is what differentiates these
> two cases as the SET_RESTORE_ROUND{,_NOEX} macros will either merge
> or discard all exceptions occurring during scope of their usage.
>
> Likewise, there are a number of routines to swap, replace,
> or merge FP environments.  This change reduces much of
> the common and sometimes wrong code.

LGTM.

I'm pushing it.

Thanks!

-- 
Tulio Magno