Greetings, and thanks!
Raymond Toy <[EMAIL PROTECTED]> writes:
> >>>>> "Camm" == Camm Maguire <[EMAIL PROTECTED]> writes:
>
> Camm> Greetings! In getting maxima working on gcl 2.7.0, I came across
> the
> Camm> following strangeness:
>
>
> MAXIMA> (eq 'array 'lisp::array)
> Camm> NIL
>
> Camm> (defmacro arraycall (ign array &rest dims) ign
> Camm> `(aref ,array . ,dims))
>
> Camm> This slows down array referencing enormously, at least when compiled
> Camm> with GCL, and I suspect others too. What would be the matter with
> Camm> importing 'array into 'maxima, and then
>
> I fail to see how importing cl:array into maxima changes anything.
>
Well, certain compiler optimizations are keyed to the 'array symbol.
For example, all typing. subtypep cannot deal with `(maxima::array
fixnum *), it appears as an unknown type.
>
> Camm> (defmacro arraycall (ign array &rest dims) ign
> Camm> `(aref (the ,ign ,array) . ,dims))
>
> A peek at some of the uses of arraycall shows that it's something like
> (arraycall flonum aarray index). Won't your macro expansion produce
> (aref (the flonum aarray) index) which is totally wrong?
>
My apologies, I meant:
(defmacro arraycall (ign array &rest dims) ign
`(aref (the (lisp::array ,ign) ,array) . ,dims))
This seems to work here, but I've got other bugs which may obscure
things in my current testing.
Take care,
> Ray
>
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>
>
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>
--
Camm Maguire [EMAIL PROTECTED]
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