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Re: [Gcl-devel] Re: [Maxima] Bugs in gcl cause maxima build failures


From: Raymond Toy
Subject: Re: [Gcl-devel] Re: [Maxima] Bugs in gcl cause maxima build failures
Date: 21 May 2002 18:42:02 -0400
User-agent: Gnus/5.0808 (Gnus v5.8.8) XEmacs/21.5 (beets)

>>>>> "Camm" == Camm Maguire <address@hidden> writes:

    Camm> I'd like to get it right.


    >> I can help you get the right values, but I don't know how to tell gcl
    >> to get the right values.
    >> 

    Camm> Please do.  I can get gcl to report whatever we want here, but I don't
    Camm> yet understand what is intended.  Your help as always most
    Camm> appreciated!

Richard Fateman sent you the answer for single-float.  If I remember
correctly, gcl only has double-float, so here is an answer appropriate
for that:

* (integer-decode-float least-positive-normalized-double-float)

4503599627370496
-1074
1
* (scale-float 4503599627370496d0 -1074)

2.2250738585072014d-308

I also remember gcl being a bit sensitive to things on the very edge
of the number range so that constant 45...96d0 might not be converted
exactly right.

Ray



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