1 /* 2 * Copyright (c) 1994, 2003, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package sun.tools.tree; 27 28 import sun.tools.java.*; 29 import sun.tools.asm.Assembler; 30 31 /** 32 * WARNING: The contents of this source file are not part of any 33 * supported API. Code that depends on them does so at its own risk: 34 * they are subject to change or removal without notice. 35 */ 36 public 37 class BitXorExpression extends BinaryBitExpression { 38 /** 39 * constructor 40 */ BitXorExpression(long where, Expression left, Expression right)41 public BitXorExpression(long where, Expression left, Expression right) { 42 super(BITXOR, where, left, right); 43 } 44 45 /** 46 * Evaluate 47 */ eval(boolean a, boolean b)48 Expression eval(boolean a, boolean b) { 49 return new BooleanExpression(where, a ^ b); 50 } eval(int a, int b)51 Expression eval(int a, int b) { 52 return new IntExpression(where, a ^ b); 53 } eval(long a, long b)54 Expression eval(long a, long b) { 55 return new LongExpression(where, a ^ b); 56 } 57 58 59 /** 60 * Simplify 61 */ simplify()62 Expression simplify() { 63 if (left.equals(true)) { 64 return new NotExpression(where, right); 65 } 66 if (right.equals(true)) { 67 return new NotExpression(where, left); 68 } 69 if (left.equals(false) || left.equals(0)) { 70 return right; 71 } 72 if (right.equals(false) || right.equals(0)) { 73 return left; 74 } 75 return this; 76 } 77 78 /** 79 * Code 80 */ codeOperation(Environment env, Context ctx, Assembler asm)81 void codeOperation(Environment env, Context ctx, Assembler asm) { 82 asm.add(where, opc_ixor + type.getTypeCodeOffset()); 83 } 84 } 85