Re: fmal and nexttowardl on alpha

[Jakub Jelinek <jakub at redhat dot com>]

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.
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.

	Jakub