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From: cdl@mplvax.ARPA (Carl Lowenstein)
Newsgroups: net.micro.att
Subject: Re: labels in 3b* asm files
Message-ID: <262@mplvax.ARPA>
Date: Mon, 24-Feb-86 00:01:23 EST
Article-I.D.: mplvax.262
Posted: Mon Feb 24 00:01:23 1986
Date-Received: Wed, 26-Feb-86 06:33:17 EST
References: <2768@gatech.CSNET>
Reply-To: cdl@mplvax.UUCP (Carl Lowenstein)
Organization: Marine Physical Laboratory, UCSD
Lines: 22

In article <2768@gatech.CSNET> hope@gatech.CSNET (Theodore Hope) writes:
>Does anyone know if the assemblers on 3b2/3b5/3b20 machines support any sort
>of 'local' labels?  By that I mean the following sort of thing:
>
>        :
> 1f:  addw &3,x   <---------------------+
>        :				|
>        :				|
>      bneq 1b		  /* go back to +
>
>(Ignore the actual instructions, it's the labeling that I'm concerned with.)
>
Generally speaking, no.  The 3b assemblers are merely the last pass of a C
compiler, and have nothing good in the way of human engineering.  You can
define 'local' labels which don't get into the symbol table by using a
period (.) for the first character of the label name.  But they don't quietly
disappear the way that Knuth's 1f: and 1b: labels, or DEC's 1$: and 2$:


-- 
	carl lowenstein		marine physical lab	u.c. san diego
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