Mercurial > hg-old > index.cgi

comparison old-trunk/lwasm/old/insn_rtor.c @ 339:eb230fa7d28e

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Prepare for migration to hg
author lost
date Fri, 19 Mar 2010 02:54:14 +0000
parents
children
comparison
equal deleted inserted replaced
338:e7885b3ee266 339:eb230fa7d28e
1 /*
2 insn_rtor.c
3 Copyright © 2009 William Astle
4
5 This file is part of LWASM.
6
7 LWASM is free software: you can redistribute it and/or modify it under the
8 terms of the GNU General Public License as published by the Free Software
9 Foundation, either version 3 of the License, or (at your option) any later
10 version.
11
12 This program is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 more details.
16
17 You should have received a copy of the GNU General Public License along with
18 this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21 /*
22 for handling register to register mode instructions
23 */
24
25 #define __insn_rtor_c_seen__
26 #include <config.h>
27 #include "lwasm.h"
28 #include "instab.h"
29
30 OPFUNC(insn_rtor)
31 {
32 int r0, r1;
33 static const char *regs = "D X Y U S PCW V A B CCDP0 0 E F ";
34 static const char *regs9 = "D X Y U S PC A B CCDP ";
35
36 lwasm_emitop(as, l, instab[opnum].ops[0]);
37 // register to register (r0,r1)
38 // registers are in order:
39 // D,X,Y,U,S,PC,W,V
40 // A,B,CC,DP,0,0,E,F
41 r0 = lwasm_lookupreg2((as -> no6309) ? regs9 : regs, p);
42 if (r0 < 0 || *(*p)++ != ',')
43 {
44 register_error(as, l, 1, "Bad operand");
45 r0 = r1 = 0;
46 }
47 else
48 {
49 r1 = lwasm_lookupreg2((as -> no6309) ? regs9 : regs, p);
50 if (r1 < 0)
51 {
52 register_error(as, l, 1, "Bad operand");
53 r0 = r1 = 0;
54 }
55 }
56 lwasm_emit(as, l, (r0 << 4) | r1);
57 }