Re: fmal and nexttowardl on alpha

[Andreas Jaeger <aj at suse dot de>]

Jakub Jelinek <jakub@redhat.com> writes:

> On Thu, Apr 05, 2001 at 09:05:43AM +0200, Andreas Jaeger wrote:
> > Stephen L Moshier <moshier@mediaone.net> writes:
> > 
> > > >It's not only Alpha - it's all platforms that don't have long double,
> > > >e.g. also Sparc.
> > > 
> > > Sparc has 128-bit long double, supported by gcc.
> > 
> > In that case we should make that known for sparc32 (sparc64 does it
> > right already).
> > 
> > Uli, Jakub, what do you think?  Shall I commit this?

> No. long double is the same type as double on sparc32, until we change this.

Thanks for the explanation.

> But the change needs to be well thought out in order to preserve binary
> compatibility, similarly to PowerPC and Alpha.
> gcc-2.96-RH and 3.0/3.1 support -mlong-double-64 and -mlong-double-128
> command line switches (and -mlong-double-64 is the default) on sparc32, so
> the steps are basically:
> 1) glibc has to enforce gcc-2.96 and above on sparc32 in configure
> 2) all functions which touch long double (including stuff like printf etc.)
>    need to be versioned
> 3) -mlong-double-128 has to be used, headers updated
> 
> and once this is done, gcc configure can check whether glibc supports
> 128-bit long double and if yes, default to -mlong-double-128.
> 
> I assume all of Sparc32, Alpha and PowerPC could be changed at once...
> 
> So it is not that trivial.

I guess this is a task that can only be done when gcc 3.0 is out -
let's wait for some time.

Andreas
-- 
 Andreas Jaeger
  SuSE Labs aj@suse.de
   private aj@arthur.inka.de
    http://www.suse.de/~aj