Re: +-Inf and NaN

Hi Camm,

Camm Maguire <[email protected]>:

> If anyone has any extremely minor suggestions in the
> next week or so please send them my way.


I don't know if this counts as "minor", but as I already posted on the GCL
list (without receiving a response), I'd suggest updating the copy of
libgmp that comes bundled with the GCL source. It's a very old one.

Using an up-to-date version of libgmp fixes an annoying bug where certain
bigfloat errors cannot be caught in Lisp or Maxima (they always terminate
the process).

A particular example:

In GCL: (expt 2 (expt 2 62))
In Maxima: 2^2^62;

(Note: with the exponent 63 it works, libgmp's overflow check is bugged)

This just terminates the program with the error message "gmp: overflow in
mpz type", and there's no way to catch the error.

In a more recent version of libgmp, this bug has been fixed. There are also
some speedups in the more recent versions.

Best regards
David Scherfgen

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