[Qemu-devel] Re: MIPS instruction set configuration

[Marius Groeger]

On Tue, 27 Jun 2006, Dirk Behme wrote:

> Fabrice Bellard wrote:
>
> > > > > 3. [PATCH] Add special MIPS multiply instructions
> > > > > http://lists.gnu.org/archive/html/qemu-devel/2006-04/msg00375.html
> > > >
> > > > Same remark.
> > >
> > > These are NEC VR54xx specific extensions to the MIPS instruction set.
> > >
> > > They are used if you use GCC's -march=vr5400 option. See
> > >
> > > www.necelam.com/docs/files/1375_V2.pdf
> > >
> > > as well.
> >  Can you add some kind of define or dynamic processor definnition in your 
> > patch so that we can keep track of the exact instruction set ?
>
> Yes, I will update the patch. Any ideas or proposals from anybody how to do 
> this the best way? Are there already examples from other architectures?
>
> I think a define to be able to completely select/unselect it at compile time 
> combined with possibility for dynamic runtime selection would be the best?

I'm trying to make sense of a compile-time switch -- for the use to 
select you vr5400 based platform, I can't think of anything else than 
a new -M option (ie. a new machine definition). So the full set of 
possible insns must be present and be available depending on the 
machine (-M ...) at runtime.

Or is it possible to compile qemu for a specific "-M machine"?

Regards,
Marius

--
Marius Groeger <address@hidden>
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