[kaffe] JIT3 def files and instruction reuse

[Michael Franz]

On Mon, 30 Aug 2004 15:28:19 +0900 (JST), Kiyo Inaba
<inaba at src.ricoh.co.jp> wrote:
> Hi Michael,
> 
> Michael Franz wrote:
> >Sorry, I am looking at the PowerPC JIT3 from the JanOSVM (based on
> >kaffe).  Does this mean other processors treat references and other
> >types differently?  And there is no reuse for JIT instructions?  If I
> >have to define the instruction as HAVE_add_ref addr_RRR is there a way
> >to use the add_RRR instruction, or do I have to define addr_RRR and
> >just remember to update both versions when there are
> >bugs/enhancements?
> 
> I am sorry that I forget you are now tackling PowerPC port (the
> activity may benefits so many people, I hope). Since I am in travel
> right now, I write this mail based on my memory.
> 
> As far as I remember, m68k should be the only CPU which differentiate
> 'address register' and 'data register' in kaffe port. The difference
> makes some instruction only be used for reference with address
> register. This is the reason why jit definition treats addition of
> reference differently.
> 
> If powerpc does not have strict differentiation in registers, just
> define both to same, and forget the warning, for the time being.
> 

Is there a way to turn off the warning?  It would make it easier when
trying to figure out what actually needs to be fixed.

> This kind of difficulties to understand in kaffe comes from the nature
> of 'NetBSD of java virtual machines (copyrighted by Dalibor ;->)' and
> sometimes dull for some specific ports.
> 
> Kiyo

Michael