[klibc] Re: long long on 32-bit machines
paulus at samba.org
Thu Jan 29 22:02:42 PST 2004
H. Peter Anvin writes:
> 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?
Are you are talking about passing arguments to a function? PPC32
passes long long arguments in two registers in the order you would
expect (hi, lo), BUT you have to use an odd/even register pair. In
other words, if you have a function like this:
int foo(int a, long long b)
then a will be passed in r3 and b will be passed in r5 and r6, and r4
will be unused.
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