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diff lwasm/insn_logicmem.c @ 362:4867f18c872f
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 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/lwasm/insn_logicmem.c Thu Apr 01 20:56:19 2010 -0600 @@ -0,0 +1,94 @@ +/* +insn_logicmem.c +Copyright © 2009 William Astle + +This file is part of LWASM. + +LWASM is free software: you can redistribute it and/or modify it under the +terms of the GNU General Public License as published by the Free Software +Foundation, either version 3 of the License, or (at your option) any later +version. + +This program is distributed in the hope that it will be useful, but WITHOUT +ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or +FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for +more details. + +You should have received a copy of the GNU General Public License along with +this program. If not, see <http://www.gnu.org/licenses/>. + +Contains code for handling logic/mem instructions +*/ + +#include <config.h> +#include <ctype.h> +#include <stdio.h> +#include <string.h> + +#include <lw_expr.h> + +#include "lwasm.h" +#include "instab.h" + +extern void insn_parse_gen_aux(asmstate_t *as, line_t *l, char **optr); +extern void insn_resolve_gen_aux(asmstate_t *as, line_t *l, int force); +extern void insn_emit_gen_aux(asmstate_t *as, line_t *l, int extra); + +// for aim, oim, eim, tim +PARSEFUNC(insn_parse_logicmem) +{ + const char *p2; + lw_expr_t *s; + + if (**p == '#') + (*p)++; + + s = lwasm_parse_expr(as, p); + if (!s) + { + lwasm_register_error(as, l, "Bad operand"); + return; + } + + lwasm_save_expr(l, 100, p); + if (**p != ',' && **p != ';') + { + lwasm_register_error(as, l, "Bad operand"); + return; + } + + (*p)++; + + // now we have a general addressing mode - call for it + insn_parse_gen_aux(as, l, p); +} + +RESOLVEFUNC(insn_resolve_logicmem) +{ + if (l -> len != -1) + return; + + insn_resolve_gen_aux(as, l, force); +} + +EMITFUNC(insn_emit_logicmem) +{ + lw_expr_t e; + int v; + + e = lwasm_fetch_expr(l, 100); + if (!lw_expr_istype(e, lw_expr_type_int)) + { + lwasm_register_error(as, l, "Immediate byte must be fully resolved"); + return; + } + + v = lw_expr_intval(e); + if (v < -128 || v > 255) + { + lwasm_register_error(as, l, "Byte overflow"); + return; + } + + insn_emit_gen_aux(as, l, v); +}