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Groups > comp.lang.forth > #55966
| From | anton@mips.complang.tuwien.ac.at (Anton Ertl) |
|---|---|
| Newsgroups | comp.lang.forth |
| Subject | Re: n00b confusion regarding the implementation vs. specification of * |
| Date | 2017-03-20 15:07 +0000 |
| Organization | Institut fuer Computersprachen, Technische Universitaet Wien |
| Message-ID | <2017Mar20.160730@mips.complang.tuwien.ac.at> (permalink) |
| References | <788f5318-e6c4-499d-838a-89c45a917142@googlegroups.com> <cuidnTwS4ZVdSVPFnZ2dnUU7-KXNnZ2d@supernews.com> <oan2oo$re9$3@dont-email.me> <7-Kdnc0K7-nnBVLFnZ2dnUU7-e-dnZ2d@supernews.com> <oaocaq$659$1@dont-email.me> |
rickman <gnuarm@gmail.com> writes:
> 0101 (5) multiplicand
>x 1010 (-6) multiplier
...
[unsigned 4x4->8 multiplication)
>Result is 0x32 or 50.
The 4x4->4 result is 2
[signed 4x4->8 multiplication]
>Result is 0xE2 or -30.
The 4x4->4 result is 2.
I.e., same result. That's why we have only one *, but both M* and
UM*.
- 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
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n00b confusion regarding the implementation vs. specification of * Michael Barry <barrym95838@yahoo.com> - 2017-03-19 10:41 -0700
Re: n00b confusion regarding the implementation vs. specification of * Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-03-19 13:58 -0500
Re: n00b confusion regarding the implementation vs. specification of * rickman <gnuarm@gmail.com> - 2017-03-19 19:06 -0400
Re: n00b confusion regarding the implementation vs. specification of * Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-03-20 03:53 -0500
Re: n00b confusion regarding the implementation vs. specification of * rickman <gnuarm@gmail.com> - 2017-03-20 06:56 -0400
Re: n00b confusion regarding the implementation vs. specification of * Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-03-20 07:53 -0500
Re: n00b confusion regarding the implementation vs. specification of * rickman <gnuarm@gmail.com> - 2017-03-20 18:15 -0400
Re: n00b confusion regarding the implementation vs. specification of * Coos Haak <htrofhc@gmail.com> - 2017-03-20 23:30 +0100
Re: n00b confusion regarding the implementation vs. specification of * julian.fondren@endurance.com - 2017-03-20 15:34 -0700
Re: n00b confusion regarding the implementation vs. specification of * "Elizabeth D. Rather" <erather@forth.com> - 2017-03-20 14:40 -1000
Re: n00b confusion regarding the implementation vs. specification of * hughaguilar96@gmail.com - 2017-03-20 19:41 -0700
Re: n00b confusion regarding the implementation vs. specification of * anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-03-21 17:18 +0000
Re: n00b confusion regarding the implementation vs. specification of * anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-03-20 15:07 +0000
Re: n00b confusion regarding the implementation vs. specification of * hughaguilar96@gmail.com - 2017-03-19 12:32 -0700
Re: n00b confusion regarding the implementation vs. specification of * hughaguilar96@gmail.com - 2017-03-19 13:54 -0700
Re: n00b confusion regarding the implementation vs. specification of * albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-03-19 21:21 +0100
Re: n00b confusion regarding the implementation vs. specification of * Michael Barry <barrym95838@yahoo.com> - 2017-03-19 16:41 -0700
Re: n00b confusion regarding the implementation vs. specification of * anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-03-21 17:56 +0000
Re: n00b confusion regarding the implementation vs. specification of * anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-03-20 08:57 +0000
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