Mercurial > hg-old > index.cgi

comparison lwasm/insn_logicmem.c @ 362:4867f18c872f

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Added logic memory operands
author lost@starbug
date Thu, 01 Apr 2010 20:56:19 -0600
parents old-trunk/lwasm/old/insn_logicmem.c@eb230fa7d28e
children eacdae8a1575
comparison
equal deleted inserted replaced
361:105393e31f20 362:4867f18c872f
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 <config.h>
24 #include <ctype.h>
25 #include <stdio.h>
26 #include <string.h>
27
28 #include <lw_expr.h>
29
30 #include "lwasm.h"
31 #include "instab.h"
32
33 extern void insn_parse_gen_aux(asmstate_t *as, line_t *l, char **optr);
34 extern void insn_resolve_gen_aux(asmstate_t *as, line_t *l, int force);
35 extern void insn_emit_gen_aux(asmstate_t *as, line_t *l, int extra);
36
37 // for aim, oim, eim, tim
38 PARSEFUNC(insn_parse_logicmem)
39 {
40 const char *p2;
41 lw_expr_t *s;
42
43 if (**p == '#')
44 (*p)++;
45
46 s = lwasm_parse_expr(as, p);
47 if (!s)
48 {
49 lwasm_register_error(as, l, "Bad operand");
50 return;
51 }
52
53 lwasm_save_expr(l, 100, p);
54 if (**p != ',' && **p != ';')
55 {
56 lwasm_register_error(as, l, "Bad operand");
57 return;
58 }
59
60 (*p)++;
61
62 // now we have a general addressing mode - call for it
63 insn_parse_gen_aux(as, l, p);
64 }
65
66 RESOLVEFUNC(insn_resolve_logicmem)
67 {
68 if (l -> len != -1)
69 return;
70
71 insn_resolve_gen_aux(as, l, force);
72 }
73
74 EMITFUNC(insn_emit_logicmem)
75 {
76 lw_expr_t e;
77 int v;
78
79 e = lwasm_fetch_expr(l, 100);
80 if (!lw_expr_istype(e, lw_expr_type_int))
81 {
82 lwasm_register_error(as, l, "Immediate byte must be fully resolved");
83 return;
84 }
85
86 v = lw_expr_intval(e);
87 if (v < -128 || v > 255)
88 {
89 lwasm_register_error(as, l, "Byte overflow");
90 return;
91 }
92
93 insn_emit_gen_aux(as, l, v);
94 }