Squeak-dev Digest, Vol 33, Issue 36
John M McIntosh
johnmci at smalltalkconsulting.com
Mon Sep 19 14:12:08 UTC 2005
Well Tim was involved in a project where they changed the SLANG
compiler to extrude assembler. (SLANG to ARM Assembler).
That port is lurking, ask Tim or myself for a copy.
I'm sure I saw a port to Obj-C, see http://www.metaobject.com/
downloads/Squeak/, let's see,, mmm yes here is a snippet from interp.m
-(int)isPointers:(int )oop
{
return ([self formatOf:oop] <= 4);
}
Remember SLANG is a subset of Smalltalk to allow you to generate non-
complex basic generic C code, so going to JAVA is much simpler than
to say assembler.
I first would suggest confirming you can create a basic VM without
INLINING, althought the performance is poor, the code is much cleaner
and clearer. I could assist
you with any fixes required to do this since I recall you can't
directly create a compile error free version at the moment, inlining
actually removes 2 or 3 compiler errors by
folding out the incorrectly generated C code.
Note I have code that sets the return type of the routine to int/
char* or void depending on the method type declares. This isn't part
of the Squeak VM, but might be also required to
make certain other languages happy with typing issues.
On 19-Sep-05, at 4:39 AM, Dave Mason wrote:
>
> I was particularly looking for a bit of technical guidance. I would
> still appreciate any that is available. It is likely that the only
> part of VMMaker that would be useful to my student is the part that
> identifies the classes and methods that are needed for the VM. All of
> the code generation will be very different.
>
> ../Dave
>
>
>
--
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John M. McIntosh <johnmci at smalltalkconsulting.com> 1-800-477-2659
Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com
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