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annotate lwasm/insn_logicmem.c @ 325:6821f4855702

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Fix bug with section padding and downward allocation. When placing sections with the "high" method, padding was added to the section instance at the lowest address insted of the highest as is appropriate for the padafter option. Explicitly handle the padding for the first instance encountered (highest address) when growing down.
author William Astle <lost@l-w.ca>
date Fri, 21 Mar 2014 23:49:23 -0600
parents b78b2f1e011e
children 8764142b3192
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 }