[PATCH] float128: Add signbit alternative for old compilers

[Gabriel F. T. Gomes]

On Fri, 30 Jun 2017 20:40:25 +0000
Joseph Myers <joseph@codesourcery.com> wrote:

> On Fri, 30 Jun 2017, Gabriel F. T. Gomes wrote:
> 
> > +int
> > +__signbitf128 (_Float128 x)
> > +{
> > +  int64_t e;
> > +
> > +  GET_FLOAT128_MSW64 (e, x);
> > +  return e < 0;  
> 
> I think you should use __builtin_signbit for GCC >= 6 with a comment that 
> once GCC >= 6 is required for building glibc, this file can go back to 
> wrapping the float128 version.

OK.

> OK with that change.

Is this OK to go in now, before the freeze?