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Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
author lost@l-w.ca
date Wed, 19 Jan 2011 22:27:17 -0700
parents
children 7317fbe024af
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-1:000000000000 0:2c24602be78f
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 #include "lwasm.h"
26 #include "instab.h"
27
28 PARSEFUNC(insn_parse_rlist)
29 {
30 int rb = 0;
31 int rn;
32 static const char *regs = "CCA B DPX Y U PCD S ";
33
34 while (**p && !isspace(**p))
35 {
36 rn = lwasm_lookupreg2(regs, p);
37 if (rn < 0)
38 {
39 lwasm_register_error(as, l, "Bad register '%s'", *p);
40 return;
41 }
42 if (**p && **p != ',' && !isspace(**p))
43 {
44 lwasm_register_error(as, l, "Bad operand");
45 }
46 if (**p == ',')
47 (*p)++;
48 if (rn == 8)
49 rn = 6;
50 else if (rn == 9)
51 rn = 0x40;
52 else
53 rn = 1 << rn;
54 rb |= rn;
55 }
56 l -> len = OPLEN(instab[l -> insn].ops[0]) + 1;
57 l -> pb = rb;
58 }
59
60 EMITFUNC(insn_emit_rlist)
61 {
62 lwasm_emitop(l, instab[l -> insn].ops[0]);
63 lwasm_emit(l, l -> pb);
64 }