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

Greetings!

Raymond Toy <toy@rtp.ericsson.se> writes:

> >>>>> "Camm" == Camm Maguire <camm@enhanced.com> writes:
> 
>     Camm> Greetings!
>     Camm> Raymond Toy <toy@rtp.ericsson.se> writes:
> 
>     >> >>>>> "Camm" == Camm Maguire <camm@enhanced.com> writes:
>     >> 
>     Camm> Please keep the gcl-list abreast of these hacks!  Probably all need to
>     Camm> find there way into gcl at some point.
>     >> 
>     >> With your latest changes, I don't really think there is a need for
>     >> this anymore, after you fix the least-positive-normalized-single-float
>     >> issue. :-)
>     >> 
> 
>     Camm> OK, this is now set to the unnormalized result.  I think that's right
>     Camm> from the spec.
> 
> At least for sparc and x86 which implement IEEE FP arithmetic, I don't
> think this is right.  The CLHS says the normalized float must be a
> normalized float.  If you make it the unnormalized one, then you're
> wrong.  And the sparc and x86 have unnormalized numbers.
> 

OK, I guess I misread.  It seemed like the only case in which there
would be a difference would be on non-IEEE systems.

> For the most part, it probably doesn't matter, but some numerical
> algorithms expect them to be right.
> 

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.
> 

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


> Ray
> 
> 
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> 

-- 
Camm Maguire			     			camm@enhanced.com
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