Groups > comp.lang.forth > #19280

Re: Offline compilation of Forth

From	stephenXXX@mpeforth.com (Stephen Pelc)
Newsgroups	comp.lang.forth
Subject	Re: Offline compilation of Forth
Message-ID	<51090891.421470584@192.168.0.50> (permalink)
References	<ke5otq$92o$1@oravannahka.helsinki.fi> <2013Jan29.095507@mips.complang.tuwien.ac.at> <5056219.CaSnz4R8xW@sunwukong.fritz.box> <7xsj5jm58z.fsf@ruckus.brouhaha.com>
Date	2013-01-30 11:58 +0000

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On Wed, 30 Jan 2013 00:42:20 -0800, Paul Rubin
<no.email@nospam.invalid> wrote:

>I'd hope most of the compiler could run from program flash rather than
>ram, on systems where those are separate.  Example: I have a couple of
>the TI Stellaris Launchpad (ARM Cortex M4) boards from their promotion
>last year.  The cpu has 256k of program flash and 32K of RAM, which
>seems squarely in Forth's comfort zone, so I'd been thinking of porting
>an interpreter.  It hadn't occurred to me before, but maybe one of those
>fancy compilers could actually fit in there.

Yes, they could fit in the flash. VFX needs about 3 kb of RAM. But in
todays micros, the limiting resource is RAM. For the applications we
see, the authors use all the RAM long before they use all the Flash.
Losing 10% of the RAM for a WIBNI (Wouldn't It Be Nice If ...) is
not a good trade-off.

The question is why would you need one of those "fancy compilers" in
a deep embedded application. For those embedded applications which did
use a simple Forth compiler on the target, compilation speed and
performance of the code compiled by the target were never an issue.

We already know that VFX code generators are cross compilable, since
the x86 version is cross-compiled as part of the hosted VFX Forth
kernels.

Stephen

-- 
Stephen Pelc, stephenXXX@mpeforth.com
MicroProcessor Engineering Ltd - More Real, Less Time
133 Hill Lane, Southampton SO15 5AF, England
tel: +44 (0)23 8063 1441, fax: +44 (0)23 8033 9691
web: http://www.mpeforth.com - free VFX Forth downloads

Thread

Offline compilation of Forth Lauri Alanko <la@iki.fi> - 2013-01-28 11:54 +0000
  Re: Offline compilation of Forth stephenXXX@mpeforth.com (Stephen Pelc) - 2013-01-28 17:19 +0000
    Re: Offline compilation of Forth Bernd Paysan <bernd.paysan@gmx.de> - 2013-01-28 22:08 +0100
    Re: Offline compilation of Forth "Peter Knaggs" <pjk@bcs.org.uk> - 2013-02-03 10:50 +0000
      Re: Offline compilation of Forth stephenXXX@mpeforth.com (Stephen Pelc) - 2013-02-03 12:11 +0000
        Re: Offline compilation of Forth "A. K." <akk@nospam.org> - 2013-02-03 14:59 +0100
          Re: Offline compilation of Forth Bernd Paysan <bernd.paysan@gmx.de> - 2013-02-03 15:14 +0100
            Re: Offline compilation of Forth Hannu Vuolasaho <hannu.vuolasaho@nospam.tut.fi.invalid> - 2013-02-03 15:25 +0000
          Re: Offline compilation of Forth Gary Bergstrom <g.bergstrom@ieee.org> - 2013-02-05 08:13 -0800
      Re: Offline compilation of Forth anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-02-04 16:23 +0000
  Re: Offline compilation of Forth "Elizabeth D. Rather" <erather@forth.com> - 2013-01-28 12:26 -1000
  Re: Offline compilation of Forth anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-01-29 08:55 +0000
    Re: Offline compilation of Forth Bernd Paysan <bernd.paysan@gmx.de> - 2013-01-29 17:49 +0100
      Re: Offline compilation of Forth Paul Rubin <no.email@nospam.invalid> - 2013-01-30 00:42 -0800
        Re: Offline compilation of Forth stephenXXX@mpeforth.com (Stephen Pelc) - 2013-01-30 11:58 +0000
        Re: Offline compilation of Forth Mark Wills <forthfreak@gmail.com> - 2013-01-30 23:16 -0800
          Re: Offline compilation of Forth albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-01-31 13:29 +0000
            Re: Offline compilation of Forth "Ed" <invalid@nospam.com> - 2013-02-03 12:49 +1100
              Re: Offline compilation of Forth "Clyde W. Phillips Jr." <cwpjr02@gmail.com> - 2013-02-14 20:37 -0800
      Re: Offline compilation of Forth mhx@iae.nl (Marcel Hendrix) - 2013-02-03 21:15 +0200
        Re: Offline compilation of Forth Bernd Paysan <bernd.paysan@gmx.de> - 2013-02-04 02:04 +0100
      Re: Offline compilation of Forth stephenXXX@mpeforth.com (Stephen Pelc) - 2013-02-04 13:22 +0000
        Re: Offline compilation of Forth Bernd Paysan <bernd.paysan@gmx.de> - 2013-02-04 20:07 +0100
          Re: Offline compilation of Forth mhx@iae.nl (Marcel Hendrix) - 2013-02-04 23:07 +0200
            Re: Offline compilation of Forth Bernd Paysan <bernd.paysan@gmx.de> - 2013-02-05 18:33 +0100
              Re: Offline compilation of Forth mhx@iae.nl (Marcel Hendrix) - 2013-02-06 22:53 +0200
                Re: Offline compilation of Forth Bernd Paysan <bernd.paysan@gmx.de> - 2013-02-07 00:30 +0100
    Re: Offline compilation of Forth Paul Rubin <no.email@nospam.invalid> - 2013-01-30 00:36 -0800
  Re: Offline compilation of Forth Lauri Alanko <la@iki.fi> - 2013-01-30 18:12 +0000
    Re: Offline compilation of Forth "Elizabeth D. Rather" <erather@forth.com> - 2013-01-30 09:36 -1000
    Re: Offline compilation of Forth "A. K." <akk@nospam.org> - 2013-01-31 07:45 +0100
    Re: Offline compilation of Forth Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-01-31 03:37 -0600
      Re: Offline compilation of Forth Lauri Alanko <la@iki.fi> - 2013-02-01 00:01 +0000
        Re: Offline compilation of Forth "Elizabeth D. Rather" <erather@forth.com> - 2013-01-31 14:59 -1000
          Re: Offline compilation of Forth Lauri Alanko <la@iki.fi> - 2013-02-05 15:17 +0000
            Re: Offline compilation of Forth Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-02-05 10:46 -0600
              Re: Offline compilation of Forth Bernd Paysan <bernd.paysan@gmx.de> - 2013-02-05 18:47 +0100
    Re: Offline compilation of Forth "Ed" <invalid@nospam.com> - 2013-01-31 21:47 +1100
      Re: Offline compilation of Forth Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-01-31 06:12 -0600
        Re: Offline compilation of Forth albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-01-31 13:32 +0000
        Re: Offline compilation of Forth "Elizabeth D. Rather" <erather@forth.com> - 2013-01-31 08:27 -1000
          Re: Offline compilation of Forth "Ed" <invalid@nospam.com> - 2013-02-01 10:23 +1100
            Re: Offline compilation of Forth "Elizabeth D. Rather" <erather@forth.com> - 2013-01-31 13:53 -1000
              Re: Offline compilation of Forth albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-02-01 03:17 +0000
                Re: Offline compilation of Forth "Elizabeth D. Rather" <erather@forth.com> - 2013-01-31 18:43 -1000
                Re: Offline compilation of Forth Paul Rubin <no.email@nospam.invalid> - 2013-02-01 08:45 -0800
              Re: Offline compilation of Forth Mark Wills <forthfreak@gmail.com> - 2013-01-31 23:05 -0800
                Re: Offline compilation of Forth "Elizabeth D. Rather" <erather@forth.com> - 2013-01-31 21:25 -1000
                Re: Offline compilation of Forth Paul Rubin <no.email@nospam.invalid> - 2013-02-01 08:55 -0800
                Re: Offline compilation of Forth "Elizabeth D. Rather" <erather@forth.com> - 2013-02-01 09:18 -1000
                Re: Offline compilation of Forth Mark Wills <forthfreak@gmail.com> - 2013-02-01 13:04 -0800
              Re: Offline compilation of Forth "Ed" <invalid@nospam.com> - 2013-02-03 11:20 +1100
                Re: Offline compilation of Forth stephenXXX@mpeforth.com (Stephen Pelc) - 2013-02-03 12:20 +0000
                Re: Offline compilation of Forth Paul Rubin <no.email@nospam.invalid> - 2013-02-03 07:22 -0800
                Re: Offline compilation of Forth stephenXXX@mpeforth.com (Stephen Pelc) - 2013-02-03 17:54 +0000
                Re: Offline compilation of Forth Paul Rubin <no.email@nospam.invalid> - 2013-02-03 10:17 -0800
                Re: Offline compilation of Forth albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-02-03 19:33 +0000
                Re: Offline compilation of Forth Paul Rubin <no.email@nospam.invalid> - 2013-02-03 11:53 -0800
                Re: Offline compilation of Forth Coos Haak <chforth@hccnet.nl> - 2013-02-04 00:59 +0100
                Re: Offline compilation of Forth Matthias Koch <matthias.koch@hot.uni-hannover.de> - 2013-02-04 11:38 +0100
                Re: Offline compilation of Forth Brad Eckert <hwfwguy@gmail.com> - 2013-02-06 09:13 -0800
                Re: Offline compilation of Forth "Clyde W. Phillips Jr." <cwpjr02@gmail.com> - 2013-02-14 21:02 -0800
                Re: Offline compilation of Forth "Clyde W. Phillips Jr." <cwpjr02@gmail.com> - 2013-02-14 20:55 -0800
                Re: Offline compilation of Forth "Elizabeth D. Rather" <erather@forth.com> - 2013-02-03 08:26 -1000
                Re: Offline compilation of Forth "Ed" <invalid@nospam.com> - 2013-02-05 13:04 +1100
                Re: Offline compilation of Forth stephenXXX@mpeforth.com (Stephen Pelc) - 2013-02-05 10:33 +0000
                Re: Offline compilation of Forth "Elizabeth D. Rather" <erather@forth.com> - 2013-02-05 08:56 -1000
                Re: Offline compilation of Forth "Ed" <invalid@nospam.com> - 2013-02-08 02:07 +1100
                Re: Offline compilation of Forth Roelf Toxopeus <rt4all@notthis.hetnet.nl> - 2013-02-07 19:03 +0100
                Re: Offline compilation of Forth "Ed" <invalid@nospam.com> - 2013-02-09 22:45 +1100
                Re: Offline compilation of Forth Roelf Toxopeus <rt4all@notthis.hetnet.nl> - 2013-02-09 18:56 +0100
                Re: Offline compilation of Forth Roelf Toxopeus <rt4all@notthis.hetnet.nl> - 2013-02-11 00:19 +0100
                Re: Offline compilation of Forth Alex McDonald <blog@rivadpm.com> - 2013-02-09 11:59 -0800
                Re: Offline compilation of Forth "Ed" <invalid@nospam.com> - 2013-02-13 13:13 +1100
                Re: Offline compilation of Forth Alex McDonald <blog@rivadpm.com> - 2013-02-12 19:19 -0800
                Re: Offline compilation of Forth "Clyde W. Phillips Jr." <cwpjr02@gmail.com> - 2013-02-14 21:01 -0800
      Re: Offline compilation of Forth Roberto Waltman <usenet@rwaltman.com> - 2013-02-03 16:26 -0500
        Re: Offline compilation of Forth "Ed" <invalid@nospam.com> - 2013-02-05 15:32 +1100
          Re: Offline compilation of Forth Mark Wills <forthfreak@gmail.com> - 2013-02-04 23:18 -0800

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