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 import java.util.Hashtable; 31 32 /** 33 * WARNING: The contents of this source file are not part of any 34 * supported API. Code that depends on them does so at its own risk: 35 * they are subject to change or removal without notice. 36 */ 37 public 38 class DivideExpression extends DivRemExpression { 39 /** 40 * constructor 41 */ DivideExpression(long where, Expression left, Expression right)42 public DivideExpression(long where, Expression left, Expression right) { 43 super(DIV, where, left, right); 44 } 45 46 /** 47 * Evaluate 48 */ eval(int a, int b)49 Expression eval(int a, int b) { 50 return new IntExpression(where, a / b); 51 } eval(long a, long b)52 Expression eval(long a, long b) { 53 return new LongExpression(where, a / b); 54 } eval(float a, float b)55 Expression eval(float a, float b) { 56 return new FloatExpression(where, a / b); 57 } eval(double a, double b)58 Expression eval(double a, double b) { 59 return new DoubleExpression(where, a / b); 60 } 61 62 /** 63 * Simplify 64 */ simplify()65 Expression simplify() { 66 // This code here was wrong. What if the expression is a float? 67 // In any case, if the expression throws an exception, we 68 // should just throw the exception at run-time. Throwing 69 // it at compile-time is not correct. 70 // (Fix for 4019300) 71 // 72 // if (right.equals(0)) { 73 // throw new ArithmeticException("/ by zero"); 74 // } 75 if (right.equals(1)) { 76 return left; 77 } 78 return this; 79 } 80 81 /** 82 * Code 83 */ codeOperation(Environment env, Context ctx, Assembler asm)84 void codeOperation(Environment env, Context ctx, Assembler asm) { 85 asm.add(where, opc_idiv + type.getTypeCodeOffset()); 86 } 87 } 88