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Re: ddfloat library: the behavior of >dd

Date 2026-09-13 20:33 +1000
Subject Re: ddfloat library: the behavior of >dd
Newsgroups comp.lang.forth
References (4 earlier) <11829tr$3chqi$1@dont-email.me> <11833g2$1818h$1@dont-email.me> <6aa549e4$1@news.ausics.net> <6aa58871$1@news.ausics.net> <1185hme$195e1$1@dont-email.me>
From dxf <dxforth@gmail.com>
Message-ID <6aa67bfa$1@news.ausics.net> (permalink)
Organization Ausics - https://newsgroups.ausics.net

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On 13/09/2026 5:00 pm, marcel hendrix wrote:
> On 9/12/2026 7:14 PM, dxf wrote:
>> dd# 1e-296  ddfs. 1.0000000000000000000000000000000E-296  ok
>> dd# 1e-297  ddfs. 1.0000000000000000000000000000000E-297  ok
> [..]
>> dd# 1e+300  ddfs. INF  ok
>> dd# 1e+301  ddfs. INF  ok
>> \ dd# 1e+302  ddfs. NAN/INF  ok
>> \ dd# 1e+303  ddfs. NAN/INF  ok
>> \ dd# 1e+304  ddfs. NAN/INF  ok
>> \ dd# 1e+305  ddfs. NAN/INF  ok
> 
> My interest is only in >DD . I now allow the exponent range [-294,+304] (this gives a reasonable mantissa size, e.g.
> FORTH> s" 1000.0e+304  " >dd ddfe.  1.000000000000000000000000000000e307
>
> Nan/Inf are caught because their dp and/or exponent indicator are missing and there are no digits present:
> FORTH> s" nan  " >dd ddfe.
>>DD :: dp must be `.`
> FORTH> s" -inf " >dd ddfe.
>>DD :: dp must be `.`
> FORTH> s" 1e   " >dd ddfe.  1.000000000000000000000000000000e0
> FORTH> s" 1.1  " >dd ddfe.  1.100000000000000000000000000000e0  ok
> FORTH> s" 1.1e " >dd ddfe.  1.100000000000000000000000000000e0  ok
> FORTH> s" 1.1e1" >dd ddfe.  1.100000000000000000000000000000e1  ok
> FORTH> 53-bits! s" 1..1e++1" >dd ddfe.
> Error -2
>>DD :: not a valid exponent sign ?
> 
> I just noticed these problem:
> FORTH> s" 1"       >dd ddfe.  1.000000000000000000000000000000e303  ok
> FORTH> s" 1.1e++1" >dd ddfe.  1.100000000000000000000000000000e0  ok
> FORTH> s" 1.1e+-1" >dd ddfe.  1.100000000000000000000000000000e0  ok
> FORTH> s" 1.1e-+1" >dd ddfe.  1.100000000000000000000000000000e0  ok
> 
> The '.' can be replaced by ',' and the 'e' by 'd' as settable options.

I assume you're not using my >DD any more.  The latter is creating unintended
consequences for DDFS. in the form of patches to avoid infinite loops.  Either
way it's looking messy.

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Thread

ddfloat library: the behavior of >dd marcel hendrix <mhx@iae.nl> - 2026-09-10 19:33 +0200
  Re: ddfloat library: the behavior of >dd Krishna Myneni <krishna.myneni@ccreweb.org> - 2026-09-10 13:35 -0500
    Re: ddfloat library: the behavior of >dd marcel hendrix <mhx@iae.nl> - 2026-09-10 22:10 +0200
      Re: ddfloat library: the behavior of >dd Krishna Myneni <krishna.myneni@ccreweb.org> - 2026-09-10 16:51 -0500
  Re: ddfloat library: the behavior of >dd dxf <dxforth@gmail.com> - 2026-09-11 12:16 +1000
    Re: ddfloat library: the behavior of >dd marcel hendrix <mhx@iae.nl> - 2026-09-11 12:05 +0200
      Re: ddfloat library: the behavior of >dd marcel hendrix <mhx@iae.nl> - 2026-09-12 00:27 +0200
        Re: ddfloat library: the behavior of >dd Krishna Myneni <krishna.myneni@ccreweb.org> - 2026-09-11 20:29 -0500
          Re: ddfloat library: the behavior of >dd dxf <dxforth@gmail.com> - 2026-09-12 12:02 +1000
            Re: ddfloat library: the behavior of >dd Krishna Myneni <krishna.myneni@ccreweb.org> - 2026-09-12 10:24 -0500
          Re: ddfloat library: the behavior of >dd marcel hendrix <mhx@iae.nl> - 2026-09-12 10:45 +0200
            Re: ddfloat library: the behavior of >dd dxf <dxforth@gmail.com> - 2026-09-12 19:51 +1000
            Re: ddfloat library: the behavior of >dd dxf <dxforth@gmail.com> - 2026-09-12 22:47 +1000
              Re: ddfloat library: the behavior of >dd dxf <dxforth@gmail.com> - 2026-09-13 03:14 +1000
                Re: ddfloat library: the behavior of >dd Krishna Myneni <krishna.myneni@ccreweb.org> - 2026-09-12 13:02 -0500
                Re: ddfloat library: the behavior of >dd dxf <dxforth@gmail.com> - 2026-09-13 15:44 +1000
                Re: ddfloat library: the behavior of >dd marcel hendrix <mhx@iae.nl> - 2026-09-13 09:00 +0200
                Re: ddfloat library: the behavior of >dd dxf <dxforth@gmail.com> - 2026-09-13 20:33 +1000
                Re: ddfloat library: the behavior of >dd dxf <dxforth@gmail.com> - 2026-09-14 13:28 +1000
                Re: ddfloat library: the behavior of >dd marcel hendrix <mhx@iae.nl> - 2026-09-14 10:09 +0200
                Re: ddfloat library: the behavior of >dd dxf <dxforth@gmail.com> - 2026-09-14 20:00 +1000
                Re: ddfloat library: the behavior of >dd marcel hendrix <mhx@iae.nl> - 2026-09-14 12:22 +0200
                Re: ddfloat library: the behavior of >dd dxf <dxforth@gmail.com> - 2026-09-14 21:59 +1000
                Re: ddfloat library: the behavior of >dd marcel hendrix <mhx@iae.nl> - 2026-09-14 14:26 +0200
                Re: ddfloat library: the behavior of >dd dxf <dxforth@gmail.com> - 2026-09-15 01:32 +1000
                Re: ddfloat library: the behavior of >dd marcel hendrix <mhx@iae.nl> - 2026-09-14 21:08 +0200
                Re: ddfloat library: the behavior of >dd Krishna Myneni <krishna.myneni@ccreweb.org> - 2026-09-14 15:25 -0500
                Re: ddfloat library: the behavior of >dd dxf <dxforth@gmail.com> - 2026-09-15 13:11 +1000
                Re: ddfloat library: the behavior of >dd marcel hendrix <mhx@iae.nl> - 2026-09-15 14:06 +0200
                Re: ddfloat library: the behavior of >dd dxf <dxforth@gmail.com> - 2026-09-16 00:05 +1000
                Re: ddfloat library: the behavior of >dd anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2026-09-14 15:00 +0000
                Re: ddfloat library: the behavior of >dd marcel hendrix <mhx@iae.nl> - 2026-09-14 21:15 +0200
                Re: ddfloat library: the behavior of >dd Krishna Myneni <krishna.myneni@ccreweb.org> - 2026-09-14 15:29 -0500
                Re: ddfloat library: the behavior of >dd anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2026-09-14 20:58 +0000
                Re: ddfloat library: the behavior of >dd Krishna Myneni <krishna.myneni@ccreweb.org> - 2026-09-15 07:33 -0500
                Re: ddfloat library: the behavior of >dd anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2026-09-15 15:53 +0000
                Re: ddfloat library: the behavior of >dd Krishna Myneni <krishna.myneni@ccreweb.org> - 2026-09-15 15:23 -0500
                Re: ddfloat library: the behavior of >dd Krishna Myneni <krishna.myneni@ccreweb.org> - 2026-09-15 17:53 -0500

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