|
339
|
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 }
|
