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From: levy@ttrdc.UUCP (Daniel R. Levy)
Newsgroups: net.arch
Subject: Re: pointers to freshly minted func
Message-ID: <798@ttrdc.UUCP>
Date: Sat, 15-Mar-86 20:00:11 EST
Article-I.D.: ttrdc.798
Posted: Sat Mar 15 20:00:11 1986
Date-Received: Sun, 16-Mar-86 10:48:46 EST
References: <2277@phri.UUCP> <5600043@uiucdcsb>
Organization: AT&T, Computer Systems Division, Skokie, IL
Lines: 22

In a related vein:

It is my understanding that Spice 2 (an electronic circuit simulation program
written entirely in Fortran, except for a few system-dependent interfaces) in
the CDC version had a feature called CODGEN, where it would actually generate
machine code for solving upper (or lower, or both?) triangular matrices.
Now, how in the dickens did they get the machine to "run" the generated code?
I presume the interface must have been done in assembly language or at least
not in Fortran (which appears to me even less promising than C to have a way
to "go to" the data space).  Maybe they figured out some way to overwrite a
dummy function with the specially generated code?  Even wierder, some time
ago in mod.vlsi (or whatever it was called then) someone alluded to doing
it under (the infamous Unix) f77 on a VAX (or a Sun?).  Does somebody know how
this would have been implemented?  Thanks in advance.
-- 
 -------------------------------    Disclaimer:  The views contained herein are
|       dan levy | yvel nad      |  my own and are not at all those of my em-
|         an engihacker @        |  ployer or the administrator of any computer
| at&t computer systems division |  upon which I may hack.
|        skokie, illinois        |
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