Re: RMCL 5.2 on Snow Leopard: floating point issues

Hi again,

> (this is in a Listerner 1 process "initial" breaking after the error  
> occurring for the first time resulting in float /0 errors)

What does above mean? I try to eval something like (/ 1.0 0.0) first,  
but the rest of those float tests are still keep the same.

--binghe

在 2009-10-16，11:26， Chun Tian 写道：

> 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
>>
>>
>> _______________________________________________
>> info-mcl mailing list
>> [email protected]
>> http://clozure.com/mailman/listinfo/info-mcl
>

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