Re: GNAT parameter passing, C-style?

["Frank J. Lhota" <NOSPAM.FrankLho@rcn.com>]

"Jano" <nono@celes.unizar.es> wrote in message
news:MPG.1a5e7497a07ca7709897ad@News.CIS.DFN.DE...
> Frank J. Lhota dice...
> > "Hyman Rosen" <hyrosen@mail.com> wrote in message
> > news:1072899508.453543@master.nyc.kbcfp.com...
> > > This is vanilla C for that platform. Varargs functions are called the
> > > same way. The function itself will then muck about with the registers
as
> > > needed to make things work.
> >
> > Now I get it! The problem is that I have spent most of my career with
the
> > Intel architecture, where the paucity of registers preclude any
extensive
> > use of registers for parameter passing. Of course, passing parameters by
> > registers avoids all of these issues, since nothing is pushed onto or
popped
> > off the stack.
>
> I remember from my days of assembler of some compiler which used
> frequently the AX register for the first parameter and function results.
> Though it was maybe a Pascal compiler %-)
>
> Just a curiosity.

There is still a x86 convention that functions returning integers return
them in AX / EAX.