gnupic: GPASM bug with RES pseudo-op
Subject:
GPASM bug with RES pseudo-op
From:
Eric Smith ####@####.####
Date:
30 Jul 2000 01:14:57 -0000
Message-Id: <20000730011618.7028.qmail@brouhaha.com>
The RES pseudo-op in gpasm 0.8.9 doesn't work properly.
If you do something like:
processor 16c65
org 20h
foo: res 1
bar: res 3
quux: res 5
org 0
reset: movlw 0
movwf foo
movwf bar
movwf quux
gpasm reports error 104 "Can't evaluate expression" on each of the
instructions, and the symbol table only lists reset.
A quick & dirty fix for this is to change one line in opcode.c, in
the function do_res(). There's a line that says:
state.lst.line.linetype = org;
If that line is changed to:
state.lst.line.linetype = equ;
then the code above compiles correctly.
The listing then shows a four-byte value for each res line. I think
it would be better if the listing showed a normal two-byte address in
column 1, but I didn't have time to investigate how to make that happen.
Perhaps a new linetype would be needed.
Cheers,
Eric
