Re: a newbie's dumb question...

On Fri, Jul 27, 2001 at 02:53:33AM -0400, RKRayhawk wrote:
> In all probability you can legitimately impose a
> single-line-single-instruction requirement on the source code, and
> then accept about four basic line patterns:
>
> blank lines
> comment only lines
> lines with commands only
> lines with command and comments.


With bare PIC assembly, there really aren't any places where a line
feed in required to be anything other than whitespace to a parser.
On the other hand, when trying to parse MPASM (Microchip's assembler)
directives and things like that, there are a few places where line
feeds are significant (labels, for example). There are also quite a
few places where MPASM requires some rather interesting lexer/parser
hacks to get things working properly.


Note that it's the 16, 17, and 18 architectures' assembly languages
that I'm referring to here. The new dsPIC architecture requires a
bit more work from an assembler.


You may also want to check out the GNUPIC project (www.gnupic.org)
which has as a sub-project gpasm, a GPL PIC assembler which is
relatively feature-complete. There are a variety of other goodies
available from the site as well. Also check out www.dattalo.com,
the home page of the author and maintainer of the gpsim simulator.


Regards,
  Jim Grosbach




--
James Grosbach
Principal Compiler Engineer
Microchip Technology

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