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annotate src/insn_logicmem.c @ 112:a567dbb3f1d4

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author lost
date Sat, 17 Jan 2009 16:55:53 +0000
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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 "lwasm.h"
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28 #include "instab.h"
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29 #include "expr.h"
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30
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31 extern void insn_gen_aux(asmstate_t *as, lwasm_line_t *l, char **optr, int opnum, int extra);
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32
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33 // for aim, oim, eim, tim
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34 // the immediate operand must be constant on pass 2
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35 OPFUNC(insn_logicmem)
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36 {
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37 int rval, v1;
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38 const char *p2;
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39 lwasm_expr_stack_t *s;
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40
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41 if (**p == '#')
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42 (*p)++;
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43
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44 rval = lwasm_expr_result2(as, l, p, 0, &v1, 1);
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45 if (rval != 0)
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46 v1 = 0;
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47 if (rval == 1 && as -> passnum == 2)
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48 register_error(as, l, 2, "Illegal external or intersegment reference");
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49
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50 if (v1 < -128 || v1 > 255)
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51 register_error(as, l, 2, "Byte overflow");
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52
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53 if (**p != ',' && **p != ';')
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54 {
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55 register_error(as, l, 1, "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_gen_aux(as, l, p, opnum, v1 & 0xff);
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63 }