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Groups > comp.lang.forth > #41395
| From | anton@mips.complang.tuwien.ac.at (Anton Ertl) |
|---|---|
| Newsgroups | comp.lang.forth |
| Subject | Re: Forth without integer data stack. It is even better! |
| Date | 2015-08-19 08:22 +0000 |
| Organization | Institut fuer Computersprachen, Technische Universitaet Wien |
| Message-ID | <2015Aug19.102259@mips.complang.tuwien.ac.at> (permalink) |
| References | (1 earlier) <2453d48c-1a5c-4d36-97a4-83bd63b0c43f@googlegroups.com> <bb12e5fb-884a-4df0-95cb-22efa97f7d17@googlegroups.com> <d964c6ed-efe9-4144-ad17-5d200efe1d4e@googlegroups.com> <27b25b25-2941-4021-a70d-9bb84ce41919@googlegroups.com> <dc459b05-62f1-4774-8257-905041e99cb6@googlegroups.com> |
Michael Barry <barrym95838@yahoo.com> writes:
>BTW, I have my own non-standard float implementation, yet unfinished (like so many other things in my sad life):
>
>My 32-bit float format has only one 0.0 ($00000000) and only one NaN ($80000000).
>
>+1.0 is represented as $40000000
>-1.0 is represented as $c0000000
>
>The least-significant positive value is represented as $00000001
>The least significant negative value is represented as $ffffffff
>The most-significant positive value is represented as $7fffffff
>The most-significant negative value is represented as $80000001
>
>Binary twos-complement signed comparisons and negations work
> equally well with integers and non-NaN floats, as long as the
> comparison is int-to-int or float-to-float.
>
>It still has a hidden "1" bit at the left of the significand, and
> it still normalizes, but almost everything else is eccentric and
> non-standard, kinda like me. ;-)
There have recently been discussions about such an FP representation
in comp.arch (maybe in the thread that includes
<2015Jun28.142307@mips.complang.tuwien.ac.at>). There is a certain
twist having to do with the assymmetry of twos-complement, but someone
gave a solution that sounded like it would be implementable without
too much extra cost.
- anton
--
M. Anton Ertl http://www.complang.tuwien.ac.at/anton/home.html
comp.lang.forth FAQs: http://www.complang.tuwien.ac.at/forth/faq/toc.html
New standard: http://www.forth200x.org/forth200x.html
EuroForth 2015: http://www.mpeforth.com/euroforth2015/euroforth2015.htm
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Forth without integer data stack. It is even better! "Ilya V. Vasilyev" <arvi1973@gmail.com> - 2015-08-15 19:22 -0700
Re: Forth without integer data stack. It is even better! hughaguilar96@gmail.com - 2015-08-15 20:42 -0700
Re: Forth without integer data stack. It is even better! "Ilya V. Vasilyev" <arvi1973@gmail.com> - 2015-08-16 02:13 -0700
Re: Forth without integer data stack. It is even better! hughaguilar96@gmail.com - 2015-08-18 12:09 -0700
Re: Forth without integer data stack. It is even better! Michael Barry <barrym95838@yahoo.com> - 2015-08-18 15:33 -0700
Re: Forth without integer data stack. It is even better! Michael Barry <barrym95838@yahoo.com> - 2015-08-18 16:18 -0700
Re: Forth without integer data stack. It is even better! anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-08-19 08:22 +0000
Re: Forth without integer data stack. It is even better! "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-08-19 03:38 -0400
Re: Forth without integer data stack. It is even better! "Ilya V. Vasilyev" <arvi1973@gmail.com> - 2015-09-19 17:21 -0700
Re: Forth without integer data stack. It is even better! hughaguilar96@gmail.com - 2015-09-19 21:07 -0700
Re: Forth without integer data stack. It is even better! "WJ" <w_a_x_man@yahoo.com> - 2015-08-16 06:52 +0000
Re: Forth without integer data stack. It is even better! Roelf Toxopeus <rt4all@notthis.hetnet.nl> - 2015-08-16 14:19 +0200
Re: Forth without integer data stack. It is even better! Mark Wills <markwills1970@gmail.com> - 2015-08-16 05:52 -0700
Re: Forth without integer data stack. It is even better! hughaguilar96@gmail.com - 2015-08-16 14:42 -0700
Re: Forth without integer data stack. It is even better! dylan.mcnamee@gmail.com - 2015-09-21 12:02 -0700
Re: Forth without integer data stack. It is even better! Bernd Paysan <bernd.paysan@gmx.de> - 2015-09-22 00:34 +0200
Re: Forth without integer data stack. It is even better! "WJ" <w_a_x_man@yahoo.com> - 2015-09-26 19:18 +0000
Re: Forth without integer data stack. It is even better! hughaguilar96@gmail.com - 2015-08-16 12:08 -0700
Re: Forth without integer data stack. It is even better! rickman <gnuarm@gmail.com> - 2015-08-16 15:17 -0400
Re: Forth without integer data stack. It is even better! anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-08-16 13:47 +0000
Re: Forth without integer data stack. It is even better! Paul Rubin <no.email@nospam.invalid> - 2015-08-16 07:54 -0700
Re: Forth without integer data stack. It is even better! anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-08-16 15:04 +0000
Re: Forth without integer data stack. It is even better! Bernd Paysan <bernd.paysan@gmx.de> - 2015-08-16 23:56 +0200
Re: Forth without integer data stack. It is even better! Richard Owlett <rowlett@cloud85.net> - 2015-08-17 05:57 -0500
Re: Forth without integer data stack. It is even better! Coos Haak <chforth@hccnet.nl> - 2015-08-17 13:52 +0200
Re: Forth without integer data stack. It is even better! Mark Wills <markwills1970@gmail.com> - 2015-08-17 05:00 -0700
Re: Forth without integer data stack. It is even better! anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-08-17 12:03 +0000
Re: Forth without integer data stack. It is even better! Mark Wills <markwills1970@gmail.com> - 2015-08-17 05:29 -0700
Re: Forth without integer data stack. It is even better! anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-08-18 09:10 +0000
Re: Forth without integer data stack. It is even better! Roelf Toxopeus <rt4all@notthis.hetnet.nl> - 2015-08-17 14:50 +0200
Re: Forth without integer data stack. It is even better! Bernd Paysan <bernd.paysan@gmx.de> - 2015-08-17 19:42 +0200
Re: Forth without integer data stack. It is even better! Roelf Toxopeus <rt4all@notthis.hetnet.nl> - 2015-08-17 23:16 +0200
Re: Forth without integer data stack. It is even better! Bernd Paysan <bernd.paysan@gmx.de> - 2015-08-18 01:00 +0200
Re: Forth without integer data stack. It is even better! Bernd Paysan <bernd.paysan@gmx.de> - 2015-08-18 01:17 +0200
Re: Forth without integer data stack. It is even better! Roelf Toxopeus <rt4all@notthis.hetnet.nl> - 2015-08-18 10:12 +0200
Re: Forth without integer data stack. It is even better! Александр Стадниченко <stadnichenko.a.s@gmail.com> - 2015-09-26 08:12 -0700
Re: Forth without integer data stack. It is even better! Александр Стадниченко <stadnichenko.a.s@gmail.com> - 2015-09-26 08:35 -0700
Re: Forth without integer data stack. It is even better! Bernd Paysan <bernd.paysan@gmx.de> - 2015-09-26 21:23 +0200
Re: Forth without integer data stack. It is even better! Александр Стадниченко <stadnichenko.a.s@gmail.com> - 2015-09-27 09:55 -0700
Re: Forth without integer data stack. It is even better! Александр Стадниченко <stadnichenko.a.s@gmail.com> - 2015-09-27 10:00 -0700
Re: Forth without integer data stack. It is even better! mhx@iae.nl - 2015-08-16 08:37 -0700
Re: Forth without integer data stack. It is even better! Michael Barry <barrym95838@yahoo.com> - 2015-08-17 18:28 -0700
Re: Forth without integer data stack. It is even better! hughaguilar96@gmail.com - 2015-08-17 20:17 -0700
Re: Forth without integer data stack. It is even better! rickman <gnuarm@gmail.com> - 2015-08-18 00:49 -0400
Re: Forth without integer data stack. It is even better! Michael Barry <barrym95838@yahoo.com> - 2015-08-17 23:00 -0700
Re: Forth without integer data stack. It is even better! anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-08-18 06:25 +0000
Re: Forth without integer data stack. It is even better! hughaguilar96@gmail.com - 2015-08-18 08:39 -0700
Re: Forth without integer data stack. It is even better! rickman <gnuarm@gmail.com> - 2015-08-18 12:09 -0400
Re: Forth without integer data stack. It is even better! Ilya Tarasov <ilya74.tarasov@gmail.com> - 2015-08-18 01:31 -0700
Re: Forth without integer data stack. It is even better! "Ilya V. Vasilyev" <arvi1973@gmail.com> - 2015-09-12 17:47 -0700
Re: Forth without integer data stack. It is even better! hughaguilar96@gmail.com - 2015-09-12 18:06 -0700
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