Re: RMCL 5.2 on Snow Leopard: floating point issues

Hi, Alexander

Hmmm ... I'm also in Snow Leopard using RMCL 5.2, but your tests are  
all fine here:

Welcome to Macintosh Common Lisp Version 5.2!
? 3
3
? 3.0
3.0
? *read-default-float-format*
SINGLE-FLOAT
? (setq *read-default-float-format* 'short-float)
SHORT-FLOAT
? 3
3
? 3.3
3.3
? (float 3)
3.0
? (+ 4.5 5.5)
10.0
?

This is Mac OS X 10.6.1 on Intel Core 2 Duo 2.66GHz (MacBookPro5,2). I  
just want to clarify that not everyone met the same issue as you (I'm  
sorry for that).

Regards,

Chun Tian (binghe)

在 2009-10-16，4:38， Alexander Repenning 写道：

> getting closer to WHAT is happening but not WHY. Keep in mind this  
> worked on Leopard but not Snow Leopard. I would assume this is has  
> something to do with the new version of Rosetta. Here are some  
> stunning listener interactions (this is in a Listerner 1 process  
> "initial" breaking after the error occurring for the first time  
> resulting in float /0 errors):
>
> 1 > 3
> 3
> ;; OK
> 1 > 3.0
> 1.06099791E-315
> ;; HUH!!!
>
> 1 > (setq *read-default-float-format* 'short-float)
> SHORT-FLOAT
> 1 > 3
> 3
> 1 > 3.3
> 0.0
> 1 > (float 3)
> 0.0
> 1 > (+ 4.5 5.5)
> 0.0
>
> Looks as if ANY kind of float returned is a 0.0
>
> Meanwhile, in the regular listerner things are still working as  
> expected.
>
> I am stumped at the moment and would appreciate any pointer or even  
> wild guesses on how RMCL could possibly enter this state.
>
> So far I have only seen the problem in process initial but I am not  
> sure if this is relevant.
>
> all the best,  Alex
>
>
>
>
>
>
> On Oct 14, 2009, at 2:57 PM, Terje Norderhaug wrote:
>
>> On Oct 14, 2009, at 9:15 AM, Alexander Repenning wrote:
>>> What kinds of  issues do people have out there with RMCL 5.2 and
>>> Snow Leopard (OS X, 10.6.1)?
>>>
>>> Things almost work here but there are some strange floating point
>>> issues (with shorts).
>>>
>>> At least we get further, ironically, with RCML 5.2 than CCL 1.3
>>> which immediately quits. What is the version of CCL one should use
>>> to work under OS X 10.6.1?
>>
>> Are these the same as the problems discussed in issue 8 at
>> mcl.googlecode.com?
>>
>>   http://code.google.com/p/mcl/issues/detail?id=8
>>
>> Gary made some changes to the floating point functionality, but come
>> to think about it, these changes may not have been propagated into
>> the distribution yet:
>>
>>   http://code.google.com/p/mcl/source/detail?
>> r=ff3f7eb878e5d61e1a8e83f6d19b3a3ea86de346
>>
>> -- Terje
>> _______________________________________________
>> info-mcl mailing list
>> [email protected]
>> http://clozure.com/mailman/listinfo/info-mcl
>
> Prof. Alexander Repenning
>
> University of Colorado
> Computer Science Department
> Boulder, CO 80309-430
>
> vCard: http://www.cs.colorado.edu/~ralex/AlexanderRepenning.vcf
>
>
> _______________________________________________
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