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annotate lwasm/insn_logicmem.c @ 136:b78b2f1e011e

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Fixed additional instruction length problems with logic/memory operations
author lost@l-w.ca
date Wed, 17 Aug 2011 21:04:33 -0600
parents 7317fbe024af
children 8764142b3192
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1 /*
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2 insn_logicmem.c
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3 Copyright © 2009 William Astle
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4
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5 This file is part of LWASM.
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6
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7 LWASM is free software: you can redistribute it and/or modify it under the
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8 terms of the GNU General Public License as published by the Free Software
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9 Foundation, either version 3 of the License, or (at your option) any later
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10 version.
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11
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12 This program is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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15 more details.
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16
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17 You should have received a copy of the GNU General Public License along with
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18 this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 Contains code for handling logic/mem instructions
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21 */
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22
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23 #include <ctype.h>
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24 #include <stdio.h>
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25 #include <string.h>
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26
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27 #include <lw_expr.h>
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28
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29 #include "lwasm.h"
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30 #include "instab.h"
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31
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32 extern void insn_parse_gen_aux(asmstate_t *as, line_t *l, char **optr, int elen);
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33 extern void insn_resolve_gen_aux(asmstate_t *as, line_t *l, int force, int elen);
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34 extern void insn_emit_gen_aux(asmstate_t *as, line_t *l, int extra);
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35
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36 // for aim, oim, eim, tim
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37 PARSEFUNC(insn_parse_logicmem)
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38 {
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39 // const char *p2;
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40 lw_expr_t s;
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41
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42 if (**p == '#')
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43 (*p)++;
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44
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45 s = lwasm_parse_expr(as, p);
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46 if (!s)
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47 {
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48 lwasm_register_error(as, l, "Bad operand");
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49 return;
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50 }
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51
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52 lwasm_save_expr(l, 100, s);
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53 if (**p != ',' && **p != ';')
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54 {
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55 lwasm_register_error(as, l, "Bad operand");
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56 return;
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57 }
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58
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59 (*p)++;
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60
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61 // now we have a general addressing mode - call for it
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62 insn_parse_gen_aux(as, l, p, 1);
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63 }
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65 RESOLVEFUNC(insn_resolve_logicmem)
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66 {
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67 if (l -> len != -1)
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68 return;
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69
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70 insn_resolve_gen_aux(as, l, force, 1);
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71 }
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72
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73 EMITFUNC(insn_emit_logicmem)
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74 {
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75 lw_expr_t e;
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76 int v;
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77
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78 e = lwasm_fetch_expr(l, 100);
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79 if (!lw_expr_istype(e, lw_expr_type_int))
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80 {
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81 lwasm_register_error(as, l, "Immediate byte must be fully resolved");
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82 return;
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83 }
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84
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85 v = lw_expr_intval(e);
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86 /* if (v < -128 || v > 255)
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87 {
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88 fprintf(stderr, "BYTE: %d\n", v);
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89 lwasm_register_error(as, l, "Byte overflow");
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90 return;
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91 }
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92 */
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93 insn_emit_gen_aux(as, l, v & 0xff);
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94 }