Re: long long on 32-bit machines

[Arnd Bergmann]

H.P.A wrote:

> Does anyone happen to know if there are *any* 32-bit architectures (on 
> which Linux runs) for which the ABI for a "long long" is different from 
> passing two "longs" in the appropriate order, i.e. (hi,lo) for bigendian 
> or (lo,hi) for littleendian?

Some architectures require long long arguments to be passed as an
even/odd register pair. For example on s390, 

   void f(int a, int b, long long x) 

uses registers 2, 3, 4 and 5, while 

   void f(int a, long long x, int b)

uses registers 2, 4, 5 and 6. AFAIK, mips does the same, probably others
as well.

       Arnd <><
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