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Re: [Gcl-devel] Re: [Maxima] Bugs in gcl cause maxima build failures
From: |
Camm Maguire |
Subject: |
Re: [Gcl-devel] Re: [Maxima] Bugs in gcl cause maxima build failures |
Date: |
21 May 2002 19:46:24 -0400 |
Greetings!
Raymond Toy <address@hidden> writes:
> >>>>> "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.
>
OK, here is what I have:
>(setf r least-positive-normalized-single-float)
2.2250738585072014E-308
>(setf r least-positive-normalized-short-float)
1.175494S-38
>(setf r least-positive-normalized-double-float)
2.2250738585072014E-308
>(setf r least-positive-normalized-long-float)
2.2250738585072014E-308
>(integer-decode-float least-positive-normalized-double-float)
4503599627370496
-1074
1
>(integer-decode-float least-positive-normalized-short-float)
8388608
-149
1
So this looks right, given that gcl has 'single' being double, but
these are exactly the same as the unnormalized versions. Should they
be different, and if so how?
Thanks again,
> Ray
>
>
--
Camm Maguire address@hidden
==========================================================================
"The earth is but one country, and mankind its citizens." -- Baha'u'llah
- [Gcl-devel] Re: [Maxima] Bugs in gcl cause maxima build failures, (continued)
- [Gcl-devel] Re: [Maxima] Bugs in gcl cause maxima build failures, Raymond Toy, 2002/05/03
- Re: [Gcl-devel] Re: [Maxima] Bugs in gcl cause maxima build failures, Camm Maguire, 2002/05/21
- Re: [Gcl-devel] Re: [Maxima] Bugs in gcl cause maxima build failures, Raymond Toy, 2002/05/21
- Re: [Gcl-devel] Re: [Maxima] Bugs in gcl cause maxima build failures, Camm Maguire, 2002/05/21
- Re: [Gcl-devel] Re: [Maxima] Bugs in gcl cause maxima build failures, Raymond Toy, 2002/05/21
- Re: [Gcl-devel] Re: [Maxima] Bugs in gcl cause maxima build failures, Camm Maguire, 2002/05/21
- Re: [Gcl-devel] Re: [Maxima] Bugs in gcl cause maxima build failures, Raymond Toy, 2002/05/21
- Re: [Gcl-devel] Re: [Maxima] Bugs in gcl cause maxima build failures, Richard Fateman, 2002/05/21
- Re: [Gcl-devel] Re: [Maxima] Bugs in gcl cause maxima build failures, Camm Maguire, 2002/05/21
- Re: [Gcl-devel] Re: [Maxima] Bugs in gcl cause maxima build failures, Raymond Toy, 2002/05/21
- Re: [Gcl-devel] Re: [Maxima] Bugs in gcl cause maxima build failures,
Camm Maguire <=
- Re: [Gcl-devel] Re: [Maxima] Bugs in gcl cause maxima build failures, Richard Fateman, 2002/05/21
- Re: [Gcl-devel] Re: [Maxima] Bugs in gcl cause maxima build failures, Camm Maguire, 2002/05/21
- Re: [Gcl-devel] Re: [Maxima] Bugs in gcl cause maxima build failures, Camm Maguire, 2002/05/22
Re: [Gcl-devel] Re: [Maxima] Bugs in gcl cause maxima build failures, Camm Maguire, 2002/05/20