Re: GNU Prolog (small bug)

[Daniel Diaz]

Thank you for your bug report.
It will be fixed in 1.2.18.

Here is a solution if you need to fix it now:
replace lines in src/BipsPl/arith_inl_c.c:340--342 by:

#define DInteg(x)    (((x) > 0) ? floor(x) : ceil(x))

#define DFract(x)    ((x) - DInteg(x))

and rebuild/reinstall

Thank you... et bon courage :-)

STREBELLE Alain wrote:
> Daniel,
>
> Thank you for the very high quality of GNU Prolog (and of the 
> documentation).
>
> I am just starting migrating a program I had developped on LPA Prolog 
> several years ago, so I have not gone very far yet. However, I am 
> encountering the following small bug in the math processing, probably 
> linked to precision handling :
>
> Normal behaviour (extract from trace) :
>
>      32   14  Exit: 0.50500011444091797 is 
> abs(float_fractional_part(755934729.50500011)) ?
>
> Abnormal behaviour :
>
>      35   15  Exit: 5411863648.0500011 is 
> abs(float_fractional_part(7559347295.0500011)) ?
>
> !!!
>
> My system is a Mac OS X 10.2.4. You will find below an extract of my 
> system profile.
>
> I am using GNU Prolog 1.2.16, compiled on my system, using defaults from 
> .configure.
>
> Txs & BRs
>
> Alain Strebelle
> Systems Architect
> SWIFT
> Avenue Adèle, 1
> B-1310 La Hulpe
> BELGIUM
> Tel: +32 2 655 36 43
> Fax: +32 2 655 33 45
> eMail: address@hidden
>
>
> ---------------------------------------------------
> System Profile
> ---------------------------------------------------
> Software Overview:   
>
> +----------------------------------------------------------------------+
>     |     |
>     |  System version                :  Mac OS X 10.2.4 (6I32)     |
>     |  Boot volume                   :  ASTHD3     |
>     |  Kernel version                :  Darwin Kernel Version 6.4: Wed 
> Jan 29 18:50:42 PST 2003; root:xnu/xnu-344.26.obj~1/RELEASE_PPC   |
>     |  User name                     :  STREBELLE Alain        
> (astrebel)     |
>     |     |
>
> +----------------------------------------------------------------------+
> Hardware Overview:   
>
> +----------------------------------------------------------------------+
>     |     |
>     |  Machine speed                 :  800 MHz     |
>     |  Bus speed                     :  133 MHz     |
>     |  Number of processors          :  2     |
>     |  L2 cache size                 :  256K (times 2)     |
>     |  L3 cache size                 :  2MB (times 2)     |
>     |  Machine model                 :  Power Mac G4 (version = 2.1)     |
>     |  Boot ROM info                 :  4.2.5f1     |
>     |  Customer serial number        :  CK140H15-L50-ff11     |
>     |  Sales order number            :  Not available     |
>     |     |
>
> +----------------------------------------------------------------------+
> Memory Overview:   
>     Location    Type    Size
>     DIMM0/J21    SDRAM    256 MB
>     DIMM1/J22    SDRAM    256 MB
>     DIMM2/J23         empty
>
>
>
> _______________________________________________
> Bug-prolog mailing list
> address@hidden
> http://mail.gnu.org/mailman/listinfo/bug-prolog
>
> --
> Ce message a subi une analyse antivirus par MailScanner ; il est 
> vraisemblablement
> sans danger.



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