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comparison lwasm/insn_rtor.c @ 357:0cf4948d53b4

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Checkpoint - adding actual cpu instructions
author lost@starbug
date Wed, 31 Mar 2010 20:12:20 -0600
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356:7166254491ed 357:0cf4948d53b4
1 /*
2 insn_rtor.c
3 Copyright © 2010 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 #include <config.h>
23
24 #include "lwasm.h"
25 #include "instab.h"
26
27 PARSEFUNC(insn_parse_rtor)
28 {
29 int r0, r1;
30
31 static const char *regs = "D X Y U S PCW V A B CCDP0 0 E F ";
32 static const char *regs9 = "D X Y U S PC A B CCDP ";
33
34 // register to register (r0,r1)
35 // registers are in order:
36 // D,X,Y,U,S,PC,W,V
37 // A,B,CC,DP,0,0,E,F
38
39 r0 = lwasm_lookupreg2((as -> target == TARGET_6309) ? regs9 : regs, p);
40 if (r0 < 0 || *(*p)++ != ',')
41 {
42 lwasm_register_error(as, l, "Bad operand");
43 r0 = r1 = 0;
44 }
45 else
46 {
47 r1 = lwasm_lookupreg2((as -> target = TARGET_6309) ? regs9 : regs, p);
48 if (r1 < 0)
49 {
50 lwasm_register_error(as, l, "Bad operand");
51 r0 = r1 = 0;
52 }
53 }
54 l -> pb = (r0 << 4) | r1;
55 l -> len = OPLEN(instab[l -> insn].ops[0]) + 1;
56 }
57
58 EMITFUNC(insn_emit_rtor)
59 {
60 lwasm_emitop(l, instab[l -> insn].ops[0]);
61 lwasm_emit(l, l -> pb);
62 }