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Groups > comp.lang.forth > #19427
| From | anton@mips.complang.tuwien.ac.at (Anton Ertl) |
|---|---|
| Newsgroups | comp.lang.forth |
| Subject | Re: About stack access profundity |
| Date | 2013-02-04 16:39 +0000 |
| Organization | Institut fuer Computersprachen, Technische Universitaet Wien |
| Message-ID | <2013Feb4.173941@mips.complang.tuwien.ac.at> (permalink) |
| References | (5 earlier) <3Oadnf8j7b_hbJrMnZ2dnUVZ_rSdnZ2d@supernews.com> <2013Jan29.180156@mips.complang.tuwien.ac.at> <iaedncaLNcntjpXMnZ2dnUVZ_qadnZ2d@supernews.com> <2013Jan30.184013@mips.complang.tuwien.ac.at> <7xr4l278ns.fsf@ruckus.brouhaha.com> |
Paul Rubin <no.email@nospam.invalid> writes:
>anton@mips.complang.tuwien.ac.at (Anton Ertl) writes:
>>>might well be the case that a fetch from a field is faster than a
>>>PICK. We don't know.
>>
>> Sure, it's possible to write a PICK that's so slow that this is true.
>> But why would you optimize for such an intentionally-slow system?
>
>Stack-oriented hardware that is super fast at traditional stack
>operations
Not really. Even the fast stack operations (like DUP) take one cycle,
and SWAP is often more expensive.
> but slow at reaching into the stack?
Yes. There have been Forth CPUs that supported fast constant PICK,
but AFAIK they never got very far.
> Such cpu's have figured
>significantly into Forth history.
Whatever you consider history. The have a lot of mindshare in the
Forth community, but the practical relevance is pretty small. The
most-used one seems to be the RTX2000, and that has not been
manufactured for a long time, so AFAIK nobody does new projects with
it.
- 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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About stack access profundity Pablo Hugo Reda <pabloreda@gmail.com> - 2013-01-27 12:11 -0800
Re: About stack access profundity humptydumpty <ouatubi@gmail.com> - 2013-01-28 00:59 -0800
Re: About stack access profundity Pablo Hugo Reda <pabloreda@gmail.com> - 2013-01-28 07:17 -0800
Re: About stack access profundity Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-01-28 03:10 -0600
Re: About stack access profundity Pablo Hugo Reda <pabloreda@gmail.com> - 2013-01-28 07:23 -0800
Re: About stack access profundity Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-01-28 10:46 -0600
Re: About stack access profundity anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-01-29 08:20 +0000
Re: About stack access profundity Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-01-29 03:25 -0600
Re: About stack access profundity anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-01-29 09:47 +0000
Re: About stack access profundity Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-01-29 04:08 -0600
Re: About stack access profundity anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-01-29 15:21 +0000
Re: About stack access profundity Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-01-29 09:57 -0600
Re: About stack access profundity anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-01-29 17:01 +0000
Re: About stack access profundity Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-01-29 12:22 -0600
Re: About stack access profundity anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-01-30 17:40 +0000
Re: About stack access profundity Paul Rubin <no.email@nospam.invalid> - 2013-01-30 11:49 -0800
Re: About stack access profundity anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-02-04 16:39 +0000
Re: About stack access profundity Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-01-30 16:32 -0600
Re: About stack access profundity anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-01-31 16:02 +0000
Re: About stack access profundity stephenXXX@mpeforth.com (Stephen Pelc) - 2013-01-29 17:06 +0000
Re: About stack access profundity anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-01-29 17:58 +0000
Re: About stack access profundity Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-01-29 12:29 -0600
Re: About stack access profundity anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-01-30 17:22 +0000
Re: About stack access profundity Bernd Paysan <bernd.paysan@gmx.de> - 2013-01-29 20:17 +0100
Re: About stack access profundity mhx@iae.nl (Marcel Hendrix) - 2013-01-29 21:44 +0200
Re: About stack access profundity Bernd Paysan <bernd.paysan@gmx.de> - 2013-01-29 22:14 +0100
Re: About stack access profundity anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-01-30 16:29 +0000
Re: About stack access profundity Pablo Hugo Reda <pabloreda@gmail.com> - 2013-01-30 09:58 -0800
Re: About stack access profundity stephenXXX@mpeforth.com (Stephen Pelc) - 2013-01-31 12:32 +0000
Re: About stack access profundity Bernd Paysan <bernd.paysan@gmx.de> - 2013-01-31 15:37 +0100
Re: About stack access profundity Mark Wills <forthfreak@gmail.com> - 2013-01-29 23:12 -0800
Re: About stack access profundity stephenXXX@mpeforth.com (Stephen Pelc) - 2013-01-29 10:08 +0000
Re: About stack access profundity Pablo Hugo Reda <pabloreda@gmail.com> - 2013-01-29 07:10 -0800
Re: About stack access profundity anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-01-29 15:17 +0000
Re: About stack access profundity Mark Wills <forthfreak@gmail.com> - 2013-01-29 00:57 -0800
Re: About stack access profundity Mark Wills <forthfreak@gmail.com> - 2013-01-28 01:56 -0800
Re: About stack access profundity anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-01-29 15:30 +0000
Re: About stack access profundity Pablo Hugo Reda <pabloreda@gmail.com> - 2013-01-29 09:06 -0800
Re: About stack access profundity Pablo Hugo Reda <pabloreda@gmail.com> - 2013-02-03 06:22 -0800
Re: About stack access profundity Mark Wills <forthfreak@gmail.com> - 2013-02-03 07:25 -0800
Re: About stack access profundity Pablo Hugo Reda <pabloreda@gmail.com> - 2013-02-03 15:51 -0800
Re: About stack access profundity Coos Haak <chforth@hccnet.nl> - 2013-02-04 01:12 +0100
Re: About stack access profundity Mark Wills <forthfreak@gmail.com> - 2013-02-03 23:10 -0800
Re: About stack access profundity Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-02-04 03:26 -0600
Re: About stack access profundity humptydumpty <ouatubi@gmail.com> - 2013-02-03 11:26 -0800
Re: About stack access profundity Pablo Hugo Reda <pabloreda@gmail.com> - 2013-02-03 15:49 -0800
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