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Re: RFC & patch: Rework MIPS command-line handling writes:
> At Mon, 15 Jul 2002 10:40:42 +0000 (UTC), "Mark D. Baushke" wrote:
> > In MIPS I the -mlong64 also implies the use of register pairs right? 
> > Where in MIPS III, the -mlong64 implies the use of a single register.
> yes.
> Several people, myself included, would be ... quite happy if that mode
> went away completely, i.e. -mlong64 were disallowed if GPRs weren't
> also 64-bit.

I am not sure it fully solves your problem. You would still have to deal
with 64-bit 'long long' integers.

We do use long long on 32-bit processors to manipulate 64-bit values.
When operating a mips processor in 32-bit mode you still need to use
register pairs for such values or figure out that the ABI only needs a
single register for a 64-bit value and use that instead. In the end, it
matters how the chip itself is configured to run as to what happens to
the size of the GPRs.
> Are you actually using -mlong64 w/ 32-bit GPR systems?

No, but we do use 64-bit integers w/ 32-bit GPR systems.

    -- Mark

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