Showing the changes to java/pkg/sun/tools/tree/DivRemExpression.java (1 of 18352 files). Show all
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| 1 | +/* | |
| 2 | + * Copyright (c) 1995, 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 | +abstract public | |
| 38 | +class DivRemExpression extends BinaryArithmeticExpression { | |
| 39 | + /** | |
| 40 | + * constructor | |
| 41 | + */ | |
| 42 | + public DivRemExpression(int op, long where, Expression left, Expression right) { | |
| 43 | + super(op, where, left, right); | |
| 44 | + } | |
| 45 | + | |
| 46 | + /** | |
| 47 | + * Inline | |
| 48 | + */ | |
| 49 | + public Expression inline(Environment env, Context ctx) { | |
| 50 | + // Do not toss out integer divisions or remainders since they | |
| 51 | + // can cause a division by zero. | |
| 52 | + if (type.inMask(TM_INTEGER)) { | |
| 53 | + right = right.inlineValue(env, ctx); | |
| 54 | + if (right.isConstant() && !right.equals(0)) { | |
| 55 | + // We know the division can be elided | |
| 56 | + left = left.inline(env, ctx); | |
| 57 | + return left; | |
| 58 | + } else { | |
| 59 | + left = left.inlineValue(env, ctx); | |
| 60 | + try { | |
| 61 | + return eval().simplify(); | |
| 62 | + } catch (ArithmeticException e) { | |
| 63 | + env.error(where, "arithmetic.exception"); | |
| 64 | + return this; | |
| 65 | + } | |
| 66 | + } | |
| 67 | + } else { | |
| 68 | + // float & double divisions don't cause arithmetic errors | |
| 69 | + return super.inline(env, ctx); | |
| 70 | + } | |
| 71 | + } | |
| 72 | +} | |