Re: Compiled Forth

Date	2015-04-07 12:00 +0100
From	Jan Coombs <Jan-54 <jenfhaomndgfwutc@murmic.plus.com>>
Newsgroups	comp.lang.forth
Subject	Re: Compiled Forth
Message-ID	<20150407120021.2ee8946f@T60A> (permalink)
References	(3 earlier) <8366080c-872a-4910-a467-26b16e9b13a8@googlegroups.com> <874motatm6.fsf@jester.gateway.sonic.net> <1156e3f9-75c2-460f-9acb-0e41b9fa7fa4@googlegroups.com> <87h9ssabjy.fsf@jester.gateway.sonic.net> <ab6ee275-45c4-4ab6-ab48-ff3609225d23@googlegroups.com>

Show all headers | View raw

On Tue, 7 Apr 2015 01:31:11 -0700 (PDT)
lehs <skydda.barnen@gmail.com> wrote:

> My goal is to make a simple and efficient system, as much 
> as possible in Forth-style. I think some minor deviations 
> from the norm is necessary, like B= and B. BDROP is just 
> a change of references, but BOVER BOVER (to make temporary 
> copies to be eaten by a comparison routine) does two CMOVE.

With some extra tagging you can just copy the pointer to do 
BOVER.  The tag (reference count +?) lets you know when the 
bignum storage is free, and warns you to not over-write it 
if it has more than one reference. 

Interesingly, increment-in-place should work for loop counters 
where the loop termination detection is sign change, because 
the number size is only reducing. 

If you really need  B= ( b1 b2 -- b1 b2 flag ) then, to keep 
sympathy, call it 2DUP_B= or something similar. 

If you do just copy pointers, and manage data refs, then the
code

  B2DUP B= 

is quick to execute, no data copying, and looks standard. 

Jan Coombs. 
-- 
email valid, else fix dots and hyphen
jan4clf2014@murrayhyphenmicroftdotcodotuk

Thread

Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-04 12:02 -0700
  Re: Compiled Forth "Elizabeth D. Rather" <erather@forth.com> - 2015-04-04 14:43 -1000
    Re: Compiled Forth hughaguilar96@gmail.com - 2015-04-04 18:16 -0700
      Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-05 10:58 -0700
    Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-05 10:52 -0700
      Re: Compiled Forth anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-04-06 15:35 +0000
        Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-06 08:51 -0700
          Re: Compiled Forth mhx@iae.nl - 2015-04-06 15:32 -0700
            Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-06 16:28 -0700
              Re: Compiled Forth mhx@iae.nl - 2015-04-08 13:58 -0700
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-08 14:41 -0700
                Re: Compiled Forth "Elizabeth D. Rather" <erather@forth.com> - 2015-04-08 14:01 -1000
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-09 00:06 -0700
                Re: Compiled Forth albert@spenarnc.xs4all.nl (Albert van der Horst) - 2015-04-10 16:48 +0000
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-10 10:23 -0700
                Re: Compiled Forth albert@spenarnc.xs4all.nl (Albert van der Horst) - 2015-04-10 18:04 +0000
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-09 10:31 -0700
                Re: Compiled Forth albert@spenarnc.xs4all.nl (Albert van der Horst) - 2015-04-09 17:57 +0000
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-09 11:06 -0700
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-22 09:17 -0700
        Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-06 09:01 -0700
  Re: Compiled Forth anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-04-05 09:32 +0000
    Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-05 11:02 -0700
      Re: Compiled Forth "HAA" <someone@microsoft.com> - 2015-04-06 18:35 +1000
  Re: Compiled Forth albert@spenarnc.xs4all.nl (Albert van der Horst) - 2015-04-05 09:52 +0000
    Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-05 11:20 -0700
    Re: Compiled Forth Paul Rubin <no.email@nospam.invalid> - 2015-04-05 11:57 -0700
      Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-05 12:05 -0700
        Re: Compiled Forth Paul Rubin <no.email@nospam.invalid> - 2015-04-05 12:47 -0700
          Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-05 13:36 -0700
            Re: Compiled Forth Paul Rubin <no.email@nospam.invalid> - 2015-04-05 13:57 -0700
              Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-05 14:37 -0700
                Re: Compiled Forth Paul Rubin <no.email@nospam.invalid> - 2015-04-05 15:10 -0700
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-05 15:23 -0700
      Re: Compiled Forth Ron Aaron <rambamist@gmail.com> - 2015-04-06 08:52 +0300
        Re: Compiled Forth Paul Rubin <no.email@nospam.invalid> - 2015-04-05 23:09 -0700
          Re: Compiled Forth Ron Aaron <rambamist@gmail.com> - 2015-04-06 10:12 +0300
          Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-06 00:15 -0700
            Re: Compiled Forth Paul Rubin <no.email@nospam.invalid> - 2015-04-06 01:05 -0700
              Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-06 01:27 -0700
            Re: Compiled Forth anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-04-06 12:20 +0000
          Re: Compiled Forth anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-04-06 12:10 +0000
            Re: Compiled Forth Paul Rubin <no.email@nospam.invalid> - 2015-04-06 11:45 -0700
              Re: Compiled Forth Melzzzzz <mel@zzzzz.com> - 2015-04-06 21:16 +0200
                Re: Compiled Forth Paul Rubin <no.email@nospam.invalid> - 2015-04-06 12:55 -0700
        Re: Compiled Forth Jan Coombs <Jan-54 <jenfhaomndgfwutc@murmic.plus.com>> - 2015-04-06 09:01 +0100
          Re: Compiled Forth Ron Aaron <rambamist@gmail.com> - 2015-04-06 11:27 +0300
      Re: Compiled Forth Jan Coombs <Jan-54 <jenfhaomndgfwutc@murmic.plus.com>> - 2015-04-06 08:06 +0100
      Re: Compiled Forth albert@spenarnc.xs4all.nl (Albert van der Horst) - 2015-04-06 14:15 +0000
  Re: Compiled Forth stephen@mpeforth.com (Stephen Pelc) - 2015-04-06 11:32 +0000
  Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-06 08:01 -0700
    Re: Compiled Forth Paul Rubin <no.email@nospam.invalid> - 2015-04-06 12:04 -0700
      Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-06 12:58 -0700
        Re: Compiled Forth Paul Rubin <no.email@nospam.invalid> - 2015-04-06 13:29 -0700
          Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-06 16:44 -0700
            Re: Compiled Forth Paul Rubin <no.email@nospam.invalid> - 2015-04-06 19:59 -0700
              Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-07 01:31 -0700
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-07 01:36 -0700
                Re: Compiled Forth Jan Coombs <Jan-54 <jenfhaomndgfwutc@murmic.plus.com>> - 2015-04-07 12:00 +0100
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-07 04:25 -0700
                Proposal for ALLOCATEd bignum's Re: Compiled Forth albert@spenarnc.xs4all.nl (Albert van der Horst) - 2015-04-07 12:41 +0000
                Re: Compiled Forth Paul Rubin <no.email@nospam.invalid> - 2015-04-08 21:40 -0700
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-09 00:18 -0700
                Re: Compiled Forth Paul Rubin <no.email@nospam.invalid> - 2015-04-09 23:43 -0700
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-10 04:07 -0700
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-10 04:37 -0700
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-10 04:45 -0700
                Re: Compiled Forth albert@spenarnc.xs4all.nl (Albert van der Horst) - 2015-04-10 12:02 +0000
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-10 07:21 -0700
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-10 07:53 -0700
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-10 09:43 -0700
                Re: Compiled Forth albert@spenarnc.xs4all.nl (Albert van der Horst) - 2015-04-10 16:43 +0000
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-10 11:03 -0700
                Re: Compiled Forth albert@spenarnc.xs4all.nl (Albert van der Horst) - 2015-04-10 18:26 +0000
                Re: Compiled Forth mhx@iae.nl - 2015-04-10 11:27 -0700
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-10 11:36 -0700
                Re: Compiled Forth mhx@iae.nl - 2015-04-10 11:56 -0700
                Re: Compiled Forth Paul Rubin <no.email@nospam.invalid> - 2015-04-10 12:20 -0700
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-10 13:00 -0700
                Re: Compiled Forth Paul Rubin <no.email@nospam.invalid> - 2015-04-10 13:14 -0700
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-10 13:29 -0700
                Re: Compiled Forth Paul Rubin <no.email@nospam.invalid> - 2015-04-10 16:08 -0700
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-10 23:08 -0700
                Re: Compiled Forth mhx@iae.nl - 2015-04-11 01:59 -0700
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-11 02:20 -0700
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-11 02:44 -0700
                Re: Compiled Forth mhx@iae.nl - 2015-04-11 11:21 -0700
                Re: Compiled Forth Paul Rubin <no.email@nospam.invalid> - 2015-04-11 11:43 -0700
                Re: Compiled Forth albert@spenarnc.xs4all.nl (Albert van der Horst) - 2015-04-11 19:44 +0000
                Re: Compiled Forth Paul Rubin <no.email@nospam.invalid> - 2015-04-11 12:51 -0700
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-11 15:26 -0700
                Re: Compiled Forth lehs <skydda.barnen@gmail.com> - 2015-04-10 04:50 -0700

csiph-web