From: maht <mattmobile@proweb.co.uk>
To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu>
Subject: Re: [9fans] Google search of the day
Date: Fri, 15 Feb 2008 20:49:06 +0000 [thread overview]
Message-ID: <47B5FAC2.3060304@proweb.co.uk> (raw)
In-Reply-To: <op.t6k00txuc6yvfe@computer>
I think the stack direction is just for the pseudocode, the stack in my
implementation grew down, it depends on what assembler primitives are
available I guess
>>
>>
>> moddiv:
>> colon
>> divmod
>> swop
>> semi
>
> I am genuinely lost, do not understand a word of it.
colon tells the inner loop that this is a set of other Words (addresses)
not machine instructions
so the loop will execute
divmod (which does division with modulous and leave the divsor, mod on
the stack)
swop then reverses the order of the top two stack items
semi then jumps to semi to pop the next I before jumping to it
It gives you an interactive compiler without linking as you can add new
Words at runtime
:square dup *
would put
square :
colon
dup
multiply
semi
somewhere in memory (called the dictionary)
My version uses two stacks, one for args and one for addresses
for more analysis I suggest some online reading, I'm not deep enough
into either paradigm to offer suitable insights
next prev parent reply other threads:[~2008-02-15 20:49 UTC|newest]
Thread overview: 101+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-13 22:03 [9fans] quote " erik quanstrom
2008-02-13 23:08 ` Pietro Gagliardi
2008-02-13 23:24 ` [9fans] Google search " dave.l
2008-02-13 23:31 ` Pietro Gagliardi
2008-02-13 23:41 ` erik quanstrom
2008-02-13 23:49 ` Pietro Gagliardi
2008-02-13 23:59 ` john
2008-02-14 0:04 ` Pietro Gagliardi
2008-02-14 6:11 ` Anant Narayanan
2008-02-15 17:39 ` Skip Tavakkolian
2008-02-14 16:45 ` Douglas A. Gwyn
2008-02-14 17:09 ` john
2008-02-14 17:27 ` erik quanstrom
2008-02-15 9:50 ` Douglas A. Gwyn
2008-02-15 11:49 ` Alf
2008-02-15 13:15 ` erik quanstrom
2008-02-15 14:56 ` Brantley Coile
2008-02-15 15:44 ` Eris Discordia
2008-02-15 16:07 ` erik quanstrom
2008-02-15 16:43 ` maht
2008-02-15 17:35 ` ron minnich
2008-02-15 18:14 ` Iruata Souza
2008-02-15 18:37 ` maht
2008-02-15 17:39 ` Eris Discordia
2008-02-15 19:05 ` maht
2008-02-15 20:11 ` Eris Discordia
2008-02-15 20:18 ` Pietro Gagliardi
2008-02-15 20:49 ` maht [this message]
2008-02-16 23:32 ` Eris Discordia
2008-02-15 23:37 ` [9fans] Non-stack-based calling conventions Lyndon Nerenberg
2008-02-15 23:39 ` Pietro Gagliardi
2008-02-15 23:47 ` Paweł Lasek
2008-02-16 0:23 ` Brantley Coile
2008-02-16 23:32 ` Eris Discordia
2008-02-16 23:41 ` Pietro Gagliardi
2008-02-16 23:49 ` Brantley Coile
2008-02-17 0:04 ` Brantley Coile
2008-02-17 13:30 ` Eris Discordia
2008-02-17 15:04 ` erik quanstrom
2008-02-17 21:43 ` Uriel
2008-02-17 23:58 ` erik quanstrom
2008-02-18 1:54 ` Bruce Ellis
2008-02-18 3:43 ` erik quanstrom
2008-02-18 4:31 ` Bruce Ellis
2008-02-18 4:40 ` Pietro Gagliardi
2008-02-18 6:22 ` Robert William Fuller
2008-02-18 7:23 ` Bruce Ellis
2008-02-18 8:38 ` Anant Narayanan
2008-02-22 10:02 ` Douglas A. Gwyn
2008-02-22 19:35 ` Anant Narayanan
2008-02-18 8:30 ` Anant Narayanan
2008-02-18 8:44 ` Bruce Ellis
2008-02-18 18:50 ` Federico G. Benavento
2008-02-18 21:53 ` Lorenzo Fernando Bivens de la Fuente
2008-02-18 22:55 ` y i y u s
2008-02-18 23:46 ` Uriel
2008-02-18 22:14 ` Pietro Gagliardi
2008-02-18 22:16 ` Pietro Gagliardi
2008-02-18 22:32 ` Federico G. Benavento
2008-02-20 11:39 ` maht
2008-02-20 17:19 ` Bruce Ellis
2008-02-22 10:02 ` Douglas A. Gwyn
2008-02-22 10:02 ` Douglas A. Gwyn
2008-02-18 22:13 ` LiteStar numnums
2008-02-18 4:44 ` Pietro Gagliardi
2008-02-18 4:46 ` Pietro Gagliardi
2008-02-18 5:03 ` Uriel
2008-02-17 16:08 ` Anthony Sorace
2008-02-17 22:03 ` Charles Forsyth
2008-02-22 10:01 ` Douglas A. Gwyn
2008-02-22 14:07 ` Iruata Souza
2008-02-22 10:01 ` Douglas A. Gwyn
2008-02-22 10:01 ` Douglas A. Gwyn
2008-02-16 8:29 ` Lluís Batlle
2008-02-17 23:09 ` Chad Dougherty
2008-02-18 21:50 ` Pietro Gagliardi
2008-02-22 10:02 ` Douglas A. Gwyn
2008-02-26 21:30 ` Paweł Lasek
2008-02-26 22:00 ` maht
2008-02-26 22:32 ` Brantley Coile
2008-02-26 23:15 ` Uriel
2008-02-26 22:33 ` Brantley Coile
2008-02-26 22:46 ` Bruce Ellis
2008-02-27 4:26 ` lucio
2008-02-27 6:52 ` ron minnich
2008-02-27 17:57 ` lucio
2008-02-28 9:33 ` Bill Gunshannon
2008-02-28 9:58 ` Charles Forsyth
2008-02-28 14:15 ` Bill Gunshannon
2008-02-14 17:14 ` [9fans] Google search of the day Eris Discordia
2008-02-14 17:28 ` Fco. J. Ballesteros
2008-02-14 20:14 ` Eris Discordia
2008-02-14 20:30 ` Patrick Kristiansen
2008-02-14 20:38 ` Eris Discordia
2008-02-14 22:09 ` Pietro Gagliardi
2008-02-15 9:00 ` Eris Discordia
2008-02-14 17:51 ` Iruata Souza
2008-02-15 9:31 ` sqweek
2008-02-18 9:48 ` Douglas A. Gwyn
2008-02-18 9:57 ` Gorka Guardiola
2008-02-19 9:17 ` sqweek
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