| /* |
| * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 8022780 |
| * @summary Test division of large values |
| * @run main/othervm -Xshare:off DivisionOverflow |
| * @author Dmitry Nadezhin |
| */ |
| import java.math.BigInteger; |
| |
| public class DivisionOverflow { |
| |
| public static void main(String[] args) { |
| try { |
| BigInteger a = BigInteger.ONE.shiftLeft(2147483646); |
| BigInteger b = BigInteger.ONE.shiftLeft(1568); |
| BigInteger[] qr = a.divideAndRemainder(b); |
| BigInteger q = qr[0]; |
| BigInteger r = qr[1]; |
| if (!r.equals(BigInteger.ZERO)) { |
| throw new RuntimeException("Incorrect signum() of remainder " + r.signum()); |
| } |
| if (q.bitLength() != 2147482079) { |
| throw new RuntimeException("Incorrect bitLength() of quotient " + q.bitLength()); |
| } |
| System.out.println("Division of large values passed without overflow."); |
| } catch (OutOfMemoryError e) { |
| // possible |
| System.err.println("DivisionOverflow skipped: OutOfMemoryError"); |
| System.err.println("Run jtreg with -javaoption:-Xmx8g"); |
| } |
| } |
| } |