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comparison src/insn_logicmem.c @ 34:b29eec6f3819

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Finished adding addressing mode handlers
author lost
date Fri, 02 Jan 2009 05:17:00 +0000
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children 538e15927776
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33:74a3fef7c8d0 34:b29eec6f3819
1 /*
2 insn_logicmem.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 Contains code for handling logic/mem instructions
21 */
22
23 #include <ctype.h>
24 #include <stdio.h>
25 #include <string.h>
26
27 #include "lwasm.h"
28 #include "instab.h"
29 #include "expr.h"
30
31 extern void insn_gen_aux(asmstate_t *as, lwasm_line_t *l, char **optr, int opnum, int extra);
32
33 // for aim, oim, eim, tim
34 OPFUNC(insn_logicmem)
35 {
36 int rval, v1;
37 const char *p2;
38 lwasm_expr_stack_t *s;
39
40 if (**p == '#')
41 (*p)++;
42
43 s = lwasm_expr_eval(*p, &p2);
44 *p = (char *)p2;
45
46 if (!s)
47 {
48 register_error(as, l, 1, "Bad expression");
49 return;
50 }
51
52 if (v1 < -128 || v1 > 255)
53 {
54 register_error(as, l, 2, "Byte overflow");
55 v1 &= 0xff;
56 }
57
58 if (**p != ',' && **p != ';')
59 {
60 register_error(as, l, 1, "Bad operand");
61 return;
62 }
63
64 (*p)++;
65
66 // now we have a general addressing mode - call for it
67 insn_gen_aux(as, l, p, opnum, v1 & 0xff);
68 }