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annotate lwasm/insn_logicmem.c @ 258:ebda5c96665e

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Improved stack handling for os9 target in lwlink Added "stack" as a valid symbol in the __os9 section. All instances of __os9 are now polled for "stack" symobls and the values added to the stack size set in the linker script. The stack size is then added to the final data size of the module. Also set a default minimum stack size of 32 bytes.
author William Astle <lost@l-w.ca>
date Thu, 31 Jan 2013 19:34:54 -0700
parents b78b2f1e011e
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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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 }