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MyASPN >> Mail Archive >> numpy-discussion
numpy-discussion
Re: [Numpy-discussion] Re: numexpr thoughts
by David M. Cooke other posts by this author
Mar 6 2006 3:39PM messages near this date
[Numpy-discussion] Re: numexpr thoughts | [Numpy-discussion] numexpr
Robert Kern <robert.kern@[...].com>  writes:

>  David M. Cooke wrote:
> 
> > 5. Currently, we use a big switch statement. There are ways (taken
> >    from Forth) that are better: indirect and direct threading.
> >    Unfortunately, it looks the easy way to do these uses GCC's
> >    capability to take the address of local labels. I'll add that if I
> >    can refactor the machine enough so that both variants can be
> >    produced. Have a look at
> >    http://www.complang.tuwien.ac.at/anton/vmgen/
> >    which is the virtual machine generator used for gforth (but
> >    applicable to other things). I may use this.
> 
>  Hmmm. If LLVM weren't so huge and such a pain to install, I might recommend
>  looking at using it. It could make a fun experiment, though.

Yeah, I had a look at that. PyPy is using it, so things could be
stolen from that.

Fortunately, our virtual machine can be simpler than most, because we
don't have conditionals or jumps :-)

-- 
|> |\/|<
/--------------------------------------------------------------------------|David M. Cooke  
                    http://arbutus.physics.mcmaster.ca/dmc/
|cookedm@[...].ca


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Tim Hochberg
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