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 NegativeExpression extends UnaryExpression {
38     /**
39      * Constructor
40      */
NegativeExpression(long where, Expression right)41     public NegativeExpression(long where, Expression right) {
42         super(NEG, where, right.type, right);
43     }
44 
45     /**
46      * Select the type of the expression
47      */
selectType(Environment env, Context ctx, int tm)48     void selectType(Environment env, Context ctx, int tm) {
49         if ((tm & TM_DOUBLE) != 0) {
50             type = Type.tDouble;
51         } else if ((tm & TM_FLOAT) != 0) {
52             type = Type.tFloat;
53         } else if ((tm & TM_LONG) != 0) {
54             type = Type.tLong;
55         } else {
56             type = Type.tInt;
57         }
58         right = convert(env, ctx, type, right);
59     }
60 
61     /**
62      * Evaluate
63      */
eval(int a)64     Expression eval(int a) {
65         return new IntExpression(where, -a);
66     }
eval(long a)67     Expression eval(long a) {
68         return new LongExpression(where, -a);
69     }
eval(float a)70     Expression eval(float a) {
71         return new FloatExpression(where, -a);
72     }
eval(double a)73     Expression eval(double a) {
74         return new DoubleExpression(where, -a);
75     }
76 
77     /**
78      * Simplify
79      */
simplify()80     Expression simplify() {
81         if (right.op == NEG) {
82             return ((NegativeExpression)right).right;
83         }
84         return this;
85     }
86 
87     /**
88      * Code
89      */
codeValue(Environment env, Context ctx, Assembler asm)90     public void codeValue(Environment env, Context ctx, Assembler asm) {
91         right.codeValue(env, ctx, asm);
92         asm.add(where, opc_ineg + type.getTypeCodeOffset());
93     }
94 }
95