How can I force float->double promotion for argument passing on PPC?

[Franz Sirl]

Am Mon, 13 Mar 2000 schrieb Jeffrey A Law:
>In message < 00031322443600.01198@enzo.bigblue.local >you write:
>  > Am Mon, 13 Mar 2000 schrieb David Edelsohn:
>  > >I believe that this is fixed in the development sources on the
>  > >newppc-branch.  At one point there was concern about breaking backward
>  > >compatbility, but that has been resolved.
>  > 
>  > No, the newppc-branch still shows the same behaviour.
>I do not think the behavior you want is not something we want to do -- unless
>I'm misunderstanding something about this discussion.

Hmm, so you mean we should continue to violate the PPC SYSV ABI in this
respect? That's OK with me, but probably it should be stated somewhere.

On binary compatibility, it's currently broken anyway vs. doubles, please look
at http://gcc.gnu.org/ml/gcc-patches/1999-11n/msg00616.html (btw, I'm seeking
approval for this, mainline+branch).

>Please see the GCC manual's discussion of float vs double promotion for
>arguments.

I can't find it, any hints on where to look?

Franz.