[fortran,patch] Extend IEEE support to all real kinds

[Steve Kargl]

On Mon, Aug 03, 2015 at 11:14:41PM +0200, FX wrote:
> 
> So, this enables full IEEE support for all real kinds. Nothing
> changes to the underlying architecture, it???s almost exclusively
> mechanical changes (adding the necessary variants to the interfaces, etc.). 
> 
> Bootstrapped and regtested on x86_64-apple-darwin14 (with associated
> libquadmath patch: https://gcc.gnu.org/ml/gcc-patches/2015-08/msg00124.html).
> OK to commit to trunk?
> 

This is OK to commit.  It's unclear whether I've
sufficient authority to OK the libquadmath path.

> 
> PS: Once this is in, I intend to focus on the next item: allowing
> all standard-mandated IEEE functions in constant expressions.  Then,
> I believe our IEEE support will be entirely bug-free (in the sense
> that there will be no known bugs in it!).
> 

See PR libquadmath/65757.  I'm not sure if it effects 
the IEEE support other than libquadmath has issues.

-- 
Steve