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Groups > comp.lang.forth > #38680

Re: Writing SM/REM and FM/MOD

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On Tue, 28 Apr 2015 01:08:16 -0400, Michael Barry <barrym95838@yahoo.com>
wrote:
> On Friday, April 24, 2015 at 6:46:24 PM UTC-7, Rod Pemberton wrote:

>> I was hoping to obtain a definition for 2TUCK or 2OVER without
>> ROT or -ROT for my own use, but the solver was taking way, way
>> too long ...  So, the best I could do was two ROTs, for now.
>>
>
> I don't really have to avoid ROT and -ROT in the DTC Forth for
> my insane little cpu hobby project, because both of them are
> very fast primitives (allegedly):
>

I have ROT as a primitive in my ITC Forth too, as C code which
optimizes very well to assembly.  However, it's still one of
the larger stack primitives.  Of course, the call overhead when
interpreting the threaded code probably limits non-ROT definations
to 3 or 4 words, i.e., longer definitions would underperform ROT
based definitions.


Rod Pemberton

-- 
Cars kill more people than guns in the U.S.
Yet, no one is trying to take away your car.

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Writing SM/REM and FM/MOD Julian Fondren <julian.fondren@gmail.com> - 2015-04-21 13:23 -0700
  Writing SM/REM and FM/MOD Mark Wills <markwills1970@gmail.com> - 2015-04-21 13:45 -0700
    Writing SM/REM and FM/MOD Mark Wills <markwills1970@gmail.com> - 2015-04-21 13:54 -0700
    Re: Writing SM/REM and FM/MOD Hans Bezemer <the.beez.speaks@gmail.com> - 2015-04-22 11:49 +0200
      Re: Writing SM/REM and FM/MOD Lars Brinkhoff <lars.spam@nocrew.org> - 2015-04-22 12:09 +0200
        Re: Writing SM/REM and FM/MOD anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-04-22 10:37 +0000
          Re: Writing SM/REM and FM/MOD Michael Barry <barrym95838@yahoo.com> - 2015-04-22 08:19 -0700
        Re: Writing SM/REM and FM/MOD Hans Bezemer <the.beez.speaks@gmail.com> - 2015-04-22 13:25 +0200
          Re: Writing SM/REM and FM/MOD Lars Brinkhoff <lars.spam@nocrew.org> - 2015-04-22 14:42 +0200
    Re: Writing SM/REM and FM/MOD foxaudioresearch@gmail.com - 2015-04-28 06:44 -0700
      Re: Writing SM/REM and FM/MOD Mark Wills <markwills1970@gmail.com> - 2015-04-28 07:27 -0700
  Re: Writing SM/REM and FM/MOD stephen@mpeforth.com (Stephen Pelc) - 2015-04-21 21:44 +0000
  Re: Writing SM/REM and FM/MOD "Rod Pemberton" <bork@lllljunkqwer.cpm> - 2015-04-21 18:32 -0400
    Re: Writing SM/REM and FM/MOD Julian Fondren <julian.fondren@gmail.com> - 2015-04-21 16:28 -0700
      Re: Writing SM/REM and FM/MOD "David N. Williams" <williams@umich.edu> - 2015-04-21 23:05 -0400
        Re: Writing SM/REM and FM/MOD "David N. Williams" <williams@umich.edu> - 2015-04-21 23:07 -0400
      Re: Writing SM/REM and FM/MOD krishna.myneni@ccreweb.org - 2015-04-22 18:15 -0700
  Re: Writing SM/REM and FM/MOD albert@spenarnc.xs4all.nl (Albert van der Horst) - 2015-04-22 00:19 +0000
    Re: Writing SM/REM and FM/MOD anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-04-22 12:54 +0000
      Re: Writing SM/REM and FM/MOD Hans Bezemer <the.beez.speaks@gmail.com> - 2015-04-22 16:50 +0200
        Re: Writing SM/REM and FM/MOD anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-04-22 15:29 +0000
        Re: Writing SM/REM and FM/MOD "Rod Pemberton" <bork@lllljunkqwer.cpm> - 2015-04-24 21:46 -0400
          Re: Writing SM/REM and FM/MOD Michael Barry <barrym95838@yahoo.com> - 2015-04-27 22:08 -0700
            Re: Writing SM/REM and FM/MOD "Rod Pemberton" <bork@lllljunkqwer.cpm> - 2015-04-28 03:24 -0400
    Re: Writing SM/REM and FM/MOD Julian Fondren <ayrnieu@gmail.com> - 2015-05-11 16:38 -0700
      Re: Writing SM/REM and FM/MOD albert@spenarnc.xs4all.nl (Albert van der Horst) - 2015-05-12 00:24 +0000
      Re: Writing SM/REM and FM/MOD anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-05-12 13:58 +0000
  Re: Writing SM/REM and FM/MOD anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-04-22 13:43 +0000

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