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lyn at healthquiz.com
Posted: Sun Jun 20, 1999 6:17 pm Reply with quote
Guest
just curious: how was the erlang compiler bootstrapped?

-Lyn


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joe at bluetail.com
Posted: Mon Jun 21, 1999 1:20 pm Reply with quote
Guest
lyn wrote:

> just curious: how was the erlang compiler bootstrapped?
>

First I designed an abstract machine to execute Erlang (
this was called the JAM machine. (JAM = Joes
Abstract machine) - Then I wrote a compiler from Erlang -> Jam
+ an emulator to see if the machine worked. Both these were written in
prolog.

At the same time Mike williams wrote a C emulator for the JAM.

Then I rewrote the erlang -> jam compiler in Erlang and used the prolog
compiler to compile it. The resultant object code was run
in the C emulator. Then we threw away prolog.

Some of this is described in:

http://www.ericsson.se/cslab/erlang/publications/prac_appl_prolog.ps

/Joe





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jhague at dadgum.com
Posted: Mon Jun 21, 1999 2:31 pm Reply with quote
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On Mon, 21 Jun 1999, Joe Armstrong wrote:
>
> JAM machine. (JAM = Joes Abstract machine)

I didn't realize that. Ah, trivia :)

On a related note, what is "VEE"? One of the Erlang docs refers to JAM,
BEAM, and VEE.

James



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tobbe at serc.rmit.edu.au
Posted: Mon Jun 21, 1999 2:50 pm Reply with quote
Guest
> On a related note, what is "VEE"? One of the Erlang docs refers to JAM,
> BEAM, and VEE.

VEE = Virdings Erlang Engine
BEAM = Bogdans Erlang Abstract Machine

(Virding == Robert Virding)
(Bogdan == Bogumil Hausman)

/Tobbe



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