1 /* 2 * Copyright (c) 2009, 2013, 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. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 6371401 27 * @summary Tests of shiftLeft and shiftRight on Integer.MIN_VALUE 28 * @run main/othervm -Xmx512m ExtremeShiftingTests 29 * @author Joseph D. Darcy 30 */ 31 import java.math.BigInteger; 32 import static java.math.BigInteger.*; 33 34 public class ExtremeShiftingTests { main(String... args)35 public static void main(String... args) { 36 BigInteger bi = ONE.shiftLeft(Integer.MIN_VALUE); 37 if (!bi.equals(ZERO)) 38 throw new RuntimeException("1 << " + Integer.MIN_VALUE); 39 40 bi = ZERO.shiftLeft(Integer.MIN_VALUE); 41 if (!bi.equals(ZERO)) 42 throw new RuntimeException("0 << " + Integer.MIN_VALUE); 43 44 bi = BigInteger.valueOf(-1); 45 bi = bi.shiftLeft(Integer.MIN_VALUE); 46 if (!bi.equals(BigInteger.valueOf(-1))) 47 throw new RuntimeException("-1 << " + Integer.MIN_VALUE); 48 49 try { 50 ONE.shiftRight(Integer.MIN_VALUE); 51 throw new RuntimeException("1 >> " + Integer.MIN_VALUE); 52 } catch (ArithmeticException ae) { 53 ; // Expected 54 } 55 56 bi = ZERO.shiftRight(Integer.MIN_VALUE); 57 if (!bi.equals(ZERO)) 58 throw new RuntimeException("0 >> " + Integer.MIN_VALUE); 59 60 try { 61 BigInteger.valueOf(-1).shiftRight(Integer.MIN_VALUE); 62 throw new RuntimeException("-1 >> " + Integer.MIN_VALUE); 63 } catch (ArithmeticException ae) { 64 ; // Expected 65 } 66 67 } 68 } 69