[Maxima] Maxima interface to Lisp bit-functions

Robert Dodier robert.dodier at gmail.com
Sat Mar 22 19:57:38 CDT 2008


On 3/22/08, van Nek <van.nek at arcor.de> wrote:

> So for clarification:
> 'literal integer' means a number like 1, 7 or 13 ?

Yes.

> x can be a 'declared integer' if it is declared by declare(x,integer) ?

Yes.

> As a test for a declared integer I can use featurep(x,integer) ?

Yes.

> > About bit_lsh(x,-3) => bit_lsh(x,-3), I would expect from bit_lsh(x,
> > 3) => 2^3*x that bit_lsh(x, - 3) => x/2^(- 3). It appears that
> > left-shift operations are simplfiied but not right-shift; I don't see why.
>
> The simplification bit_lsh(x, - 3) => x/2^(- 3) is wrong!

You're right, sorry for the bother.

best,

Robert Dodier


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