Re: [xmlvm-users] [xmlvml-users] Re: .class -> CLR pipeline

[Sascha H. <sa...@xm...>]

Hi John,
when I refactored our XMLVM structure a while ago, the CLR backend was not
added. The reason for this was mainly because we never had usable support
for JVM to CLR translation. As far as I know, the only stylesheets we have
so far are jvm2clr.xsl and clr-api.xsl, which together have not even 150
lines in them. So instead of putting this incomplete and very unusable
components back in we decided to not add it for now.

Right now we are focusing on the Objective-C and JavaScript backends, as the
smartphone market is the most important one right now. So I don't expect us
(the core team) to work on this anytime soon. However, if you feel that you
can do good progress on this, we are looking forward to help you on your
way. We have put a lot of effort in the other direction (CLR to JVM), as
this is actually a bit more difficult, but that's another story. Some things
will be easier to map from JVM to CLR. E.g. all the add instructions like
iadd, fadd, dadd etc can be mapped to a single add instruction in the CLR
world.

Again, if you wish to proceed on this we would be happy about your
contribution and could also help you if you get stuck.

// Sascha

On Sun, Oct 11, 2009 at 1:02 AM, John <jo...@tr...> wrote:

> Some slight progress - have managed to cobble together a new
> ClrOutputProcess so that .net bytecode is being converted again.
> Actually managed to get a "hello world" exe out of it, which was nice.
>
> However a slightly more complicated test trips things up, as the
> following jvm instructions don't get translated:
> jvm:new
> jvm:dup
> jvm:astore
>
> jvm:new is interesting as it seems that it's just the first of a
> handful of instructions responsible for creating a new object. The clr
> on the other hand appears to be one big newobj instruction, so I'm not
> sure how to write a suitable transform to do that.
>
> I'm also not sure what the clr equivilents of jvm:dup and jvm:astore are.
>
> Also doesn't seem to cope with anything other than a single .class
> file as input at the moment. Any hints on how to deal with these
> problems appreciated.
>
>
> On Sat, Oct 10, 2009 at 8:49 PM, John <jo...@tr...> wrote:
> > Hello,
> >
> > I'm interested in using xmlvm so I can develop jvm and .net vm
> > versions of the same app with as much shared code as possible. I've
> > been trying to get a basic hello-world example working but always get
> > the error "Could not create OutputProcess for target 'EXE'."
> >
> > A bit of poking around in the source seems to suggest that the EXE and
> > CLR pipelines have vanished - in particular
> > OutputProcessFactory.createOutputProcess doesn't recognise these
> > targets any more. Will these be restored any time soon? What's the
> > current status of the clr backend?
> >
> > Assuming this is just a glitch, can anyone tell me how far along the
> > clr backend is? Looking through the jvm2clr directory things look a
> > little... sparse. I wouldn't mind helping out but right now I wouldn't
> > have a clue where to start.
> >
> > Regards,
> >
>
>
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