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view lwasm/insn_logicmem.c @ 314:a3e277c58df9 ccdev
Checkpoint parser development for lwcc
Beginning of lemon based parser for C including all the infrastructure for
calling the lemon generated parser. This requires a translation layer from
the preprocessor token numbers to the lemon parser token numbers due to the
fact that lemon wants to control the token numbers. Eventually when the
lemon parser gets replaced with a hand crafted recursive descent parser,
this translation will no longer be required. However, in the interest of
getting things working sooner rather than later, using something like lemon
is beneficial.
author | William Astle <lost@l-w.ca> |
---|---|
date | Sun, 17 Nov 2013 11:59:36 -0700 |
parents | b78b2f1e011e |
children | 8764142b3192 |
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/* 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 <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, int elen); extern void insn_resolve_gen_aux(asmstate_t *as, line_t *l, int force, int elen); 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, s); 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, 1); } RESOLVEFUNC(insn_resolve_logicmem) { if (l -> len != -1) return; insn_resolve_gen_aux(as, l, force, 1); } 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) { fprintf(stderr, "BYTE: %d\n", v); lwasm_register_error(as, l, "Byte overflow"); return; } */ insn_emit_gen_aux(as, l, v & 0xff); }