[info-mcl] RMCL 5.2 on Snow Leopard: floating point issues
binghe.lisp at gmail.com
Thu Oct 15 22:30:49 CDT 2009
> (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.
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
> ? 3.0
> ? *read-default-float-format*
> ? (setq *read-default-float-format* 'short-float)
> ? 3
> ? 3.3
> ? (float 3)
> ? (+ 4.5 5.5)
> 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).
> 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
>> ;; OK
>> 1 > 3.0
>> ;; HUH!!!
>> 1 > (setq *read-default-float-format* 'short-float)
>> 1 > 3
>> 1 > 3.3
>> 1 > (float 3)
>> 1 > (+ 4.5 5.5)
>> Looks as if ANY kind of float returned is a 0.0
>> Meanwhile, in the regular listerner things are still working as
>> 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
>>> 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:
>>> -- Terje
>>> info-mcl mailing list
>>> info-mcl at clozure.com
>> 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
>> info-mcl at clozure.com
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