gnupic: Documentation for $ shortcut for line number
Subject:
Re: Documentation for $ shortcut for line number
From:
Colin Kuskie ####@####.####
Date:
15 Jan 2003 16:54:36 -0000
Message-Id: <20030115164538.GC28872@dalsemi.com>
On Tue, Jan 14, 2003 at 06:49:51PM -0800, Eric Smith wrote:
> Colin Kuskie wrote:
>
> > I've borrowed a few books in order to try to learn PIC programming, and
> > in one of them I noticed this construct:
> >
> > GOTO $ - 1
> >
> > where it explains that $ is expanded to the current line number. I
> > tried this in gpasm and was pleased to see that it's supported, but
> > appears to be undocumented in the manual.
>
> $ does not expand to a "line number", which would be all but worthless.
> It expands to the address of the instruction currently being assembled.
> If it's used in a context other than an instruction, such as a
> conditional, it expands to the address the next instruction would occupy,
> since the assembler's idea of current address is incremented after an
> instruction is assembled.
Mind if I quote you? :)
Colin
