PATCH: Fix 2 PPC/SYSV varargs problems

[Franz Sirl]

Am Mon, 28 Jun 1999 schrieb Richard Henderson:
>>On Sun, Jun 27, 1999 at 01:03:18PM -0700, Richard Henderson wrote:
>> We should just be implementing the algortithm exactly
>> as presented in the ABI manual.  It's clear enough.
>[...]
>> I'll give you another patch in a little bit.
>
>Try this out.  I'm starting an AIX bootstrap to see that I 
>didn't break anything there.

It nearly works :-). The only problem is that RS6000_ARG_SIZE returns 0 if
named==0 (unlike ALPHA_ARG_SIZE). That corrupts your calculations. I replaced
the 2 RS6000_ARG_SIZE(,,named) responsible for gregno calculation with
RS6000_ARG_SIZE(,,1), then it passed all my testcases. But I assume the better
fix is to correct RS6000_ARG_SIZE.

Franz.