Irix calling conventions for complex numbers

[Billinghurst, David (CALCRTS)]

> From: Eric Christopher 
>> A little experimentation suggests that complex numbers are not 
>> beings passed or returned to IRIX libc functions such as cpow{,f,l}.
>> (I will put together some examples id anyone is interested)
>
> I'm interested. I imagine Richard is too.

OK.  I am happy to hack headers, develop tests, etc but not really
capable of doing to much in the gcc internals.

	David