[Yhc] FInfo->codesize woes.
shackell at cs.york.ac.uk
Mon Feb 4 10:07:59 EST 2008
Stewart Platt wrote:
> Thanks for the reply Tom (and in reply to your message, I am modifying
> the interpreter)!
Yes, I think that's probably going to be the easiest way forward, all
the loading code etc is quite fiddly and there's no need to duplicate it :-)
> Aha, seems I threw something of a red herring with the 0x24, it was in
> fact decimal 24.
Ah, I'd wondered if that might be the case :-)
> Judging from my current output (Warning, assembly):
> something went wrong around the NEED_HEAP_32 / UNPACK area.
Indeed, you seem to have lost a few instructions, some of the earlier
ones seem to be out of order as well, though that could be deliberate :-)
Looking at the assembly is interesting, looking good so far. There are
some definite possibilities for optimization such as keeping the stack
pointer in a register, and not using CALL to do MK_AP, NEED_HEAP, EVAL
etc. Though you may well have these things in mind already :-)
One thing to be careful of is RETURN_EVAL, this is because it should
implement tail call optimisation, which can be fiddly. Of course your
example doesn't include any assembly for it, so it might be correct
Anyway, good luck, I'll be interested to hear how it goes :-)
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