14 Feb
2018
14 Feb
'18
1:27 p.m.
On Tue, 13 Feb 2018 22:12:50 -0700 Warner Losh <imp(a)bsdimp.com> wrote:
On Tue, Feb 13, 2018 at 8:18 PM, Dave Horsfall <dave(a)horsfall.org> wrote:
May be it just needs a perl script to generate C code?
Example:
2: label(lab0);
cmp r0,(r3) cmp(r0,deref(r3));
beq 2f beq(lab1);
tst (r3) => tst(deref(r3));
beq 2f beq(lab1);
add $6,r3 add(6,r3);
br 2b br(lab0);
2: label(lab1);
C calls are to macros or inline functions.
On Tue, 13 Feb 2018, Warner Losh wrote:
I don't suppose anybody has written a pdp-11 assembler to C translator...
I was wondering what it would take to convert the v6/v7 basic program into
something that can be run today.
http://www.tuhs.org/cgi-bin/utree.pl?file=V6/usr/source/s1/bas.s
or
http://www.tuhs.org/cgi-bin/utree.pl?file=V7/usr/src/cmd/bas/bas.s
Its 2128 lines. It doesn't have that fun instruction in it :) My google fu is insufficient for the day.
I'd like to see it handle "JSR PC,@(SP)+"... Are you reverse-engineering
something, writing a PDP-11 simulator, or what?