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