1 /* 2 * Copyright 2000-2004 The Apache Software Foundation 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 * 16 */ 17 package org.apache.bcel.generic; 18 19 /** 20 * DUP2_X2 - Duplicate two top operand stack words and put four down 21 * <PRE>Stack: ..., word4, word3, word2, word1 -> ..., word2, word1, word4, word3, word2, word1</PRE> 22 * 23 * @version $Id: DUP2_X2.java 386056 2006-03-15 11:31:56Z tcurdt $ 24 * @author <A HREF="mailto:m.dahm@gmx.de">M. Dahm</A> 25 */ 26 public class DUP2_X2 extends StackInstruction { 27 28 public DUP2_X2() { 29 super(org.apache.bcel.Constants.DUP2_X2); 30 } 31 32 33 /** 34 * Call corresponding visitor method(s). The order is: 35 * Call visitor methods of implemented interfaces first, then 36 * call methods according to the class hierarchy in descending order, 37 * i.e., the most specific visitXXX() call comes last. 38 * 39 * @param v Visitor object 40 */ 41 public void accept( Visitor v ) { 42 v.visitStackInstruction(this); 43 v.visitDUP2_X2(this); 44 } 45 } 46