1 /*
2 * Copyright (c) 2001, Zoltan Farkas All Rights Reserved.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18
19 package net.sf.zel.instr;
20
21 import net.sf.zel.vm.*;
22
23 /**
24 * @author zoly
25 */
26 public final class LODX extends Instruction
27 {
28 private static final long serialVersionUID = 1257172216541960034L;
29
30 private LODX(){};
31
32 /**
33 * The instruction microcode
34 * @param context ExecutionContext
35 * @throws ZExecutionException
36 */
37 public void execute(ExecutionContext context) throws ZExecutionException
38 {
39 if (context.memContext == null)
40 {
41 context.stack.push(null);
42 context.ip += 2;
43 } else
44 {
45 context.stack.push(context.memContext.get(context.code.get(++context.ip)));
46 context.ip++;
47 }
48 }
49 /**
50 * instance
51 */
52 public static final Instruction instance = new LODX();
53 }