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