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
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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
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19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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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