Re: [f-cpu] reg. rotation [Was: New suggestion about callconvention]

[Antoine <antoine@rezo.net>]

> > cedric wrote:
> > >dmove syntax will be more like this (if it exist) :
> > >	dmove r2, r1
> > >the behaviour will be :
> > >	r1 = r2
> > >	r1^1 = r2^1
> > >But I don't know if it will possible to implement it, but it's a good idea
> > > I think.
> 
> > i don't think so (TM)
> 
> Are you sure ? I was thinking that we currently need a mecanism to read r1 and 
> r1^1 and to write r2 and r2^2 at the same cycle, if we implement all the 
> instruction specified in the manual. I don't see where will be the overhead 
> in hardware, but I think it can be usefull for a lot of code. So why not ? (A 
> more precise answer will be appreciate ;-)

I think the answer is : CISC (tm) ?



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