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comparison src/insn_rlist.c @ 28:c0ff62e5ad39

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Added register list mode handler
author lost
date Fri, 02 Jan 2009 03:17:26 +0000
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children 9bd0fbfe7405
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27:f736579569b4 28:c0ff62e5ad39
1 /*
2 insn_rlist.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 inherent mode instructions
23 */
24
25 #define __insn_inh_c_seen__
26
27 #include "lwasm.h"
28 #include "instab.h"
29
30 OPFUNC(insn_rlist)
31 {
32 int rb = 0;
33 int rn;
34 static const char *regs = "CCA B DPX Y U PCD S ";
35
36 lwasm_emitop(as, l, instab[opnum].ops[0]);
37 while (**p && !isspace(**p))
38 {
39 rn = lwasm_lookupreg2(regs, p);
40 if (rn < 0)
41 {
42 register_error(as, l, 1, "Bad register '%s'", *p);
43 lwasm_emit(as, l, 0);
44 return;
45 }
46 if (**p && **p != ',' && !isspace(**p))
47 {
48 register_error(as, l, 1, "Bad operand");
49 lwasm_emit(as, l, 0);
50 }
51 if (**p == ',')
52 (*p)++;
53 if (rn == 8)
54 rn = 6;
55 else if (rn == 9)
56 rn = 0x40;
57 else
58 rn = 1 << rn;
59 rb |= rn;
60 }
61 lwasm_emit(as, l, rb);
62 }