Re: PL/MIX

glen herrmannsfeldt <gah@ugcs.caltech.edu>
8 Feb 2007 16:57:21 -0500

          From comp.compilers
Related articles
Re: PL/MIX usenet@rwaltman.net (Roberto Waltman) (2007-02-07)
Re: PL/MIX max@gustavus.edu (Max Hailperin) (2007-02-08)
Re: PL/MIX ara@nestle.csail.mit.edu (Allan Adler) (2007-02-08)
Re: PL/MIX usenet@rwaltman.net (Roberto Waltman) (2007-02-08)
Re: PL/MIX gah@ugcs.caltech.edu (glen herrmannsfeldt) (2007-02-08)
Re: PL/MIX sdn@svpal.org (Steven Nichols) (2007-02-09)
Re: PL/MIX ara@nestle.csail.mit.edu (Allan Adler) (2007-02-09)
Re: PL/MIX ara@nestle.csail.mit.edu (Allan Adler) (2007-02-11)
Re: PL/MIX ArarghMail702@Arargh.com (2007-02-12)
Re: PL/MIX Peter_Flass@Yahoo.com (Peter Flass) (2007-02-12)
Re: PL/MIX ara@nestle.csail.mit.edu (Allan Adler) (2007-02-16)
[2 later articles]
| List of all articles for this month |
From: glen herrmannsfeldt <gah@ugcs.caltech.edu>
Newsgroups: comp.programming,comp.compilers
Date: 8 Feb 2007 16:57:21 -0500
Organization: Compilers Central
References: <y93hctzf4wz.fsf@nestle.csail.mit.edu> 07-02-018
Keywords: assembler
Posted-Date: 08 Feb 2007 16:57:21 EST

(our moderator wrote)


> [Assemblers with high level syntax have been around for a long time.
> In 1966 Wirth wrote the classic PL360, an IBM 360 assembler with Algol
> syntax, as the implementation languge for Algol W.


Note that PL/360 really a high level syntax on an assembler, and
not what most would call a high level language.


Consider that the PL/360 statement


        R1:= R1+R1+R1;


will result in R1 being multiplied by four. It compiles to
something like:


      LR R1,R1
      AR R1,R1
      AR R1,R1


requiring the thought process of an assembler programmer.


-- glen


Post a followup to this message

Return to the comp.compilers page.
Search the comp.compilers archives again.