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Date: Thu, 02 Jun 2005 20:22:59 +0200
From: Andreas Tobler <toa@pop.agri.ch>
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Cc: freebsd-ppc@freebsd.org
Subject: Re: calling/runtime convention for ppc fbsd
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Hi Peter,

peterg@ptree32.com.au wrote:

>>which caling / runtime convention does fbsd ppc follow? The sysv4 from 
>>SUN dated around september 1995? Or is it another one?
> 
> 
>  That's the one.

Ok.

>>Does/should it follow this convention without any exceptions?
> 
> 
>  The one exception is that long doubles are 64-bit and not 128-bit.
> OSX/NetBSD/Linux on powerpc all use 64-bit long doubles, so it
> didn't seem to make a lot of sense to follow the ABI strictly there.

OS-X does support long double with 128-bit :) At least the newer gcc's. 
The os itself, well another question.

Anyway, my reason for this question is simple, if it is the ABI above 
then I expect that structure passing etc. should behave the same way on 
linux ppc 32-bit and freebsd 32-bit, right?

Hm, if the answer is yes, then I feel that we have some bits missing on 
the fbsd gcc. (I always talk about gcc-head, otherwise I'd reference a 
version)

Ok. I look into the sources then.

Thanks,
Andreas