Test6800154.java revision 11707:ad7af1afda7a 
1/*
2 * Copyright (c) 2009, 2015, 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 6800154
27 * @summary Add comments to long_by_long_mulhi() for better understandability
28 * @modules java.base/jdk.internal.misc
29 * @library /testlibrary
30 *
31 * @run main/othervm -Xcomp
32 *      -XX:CompileCommand=compileonly,compiler.c2.Test6800154::divcomp
33 *      compiler.c2.Test6800154
34 */
35
36
37package compiler.c2;
38
39import jdk.test.lib.Utils;
40
41public class Test6800154 implements Runnable {
42    static final long[] DIVIDENDS = {
43        0,
44        1,
45        2,
46        1423487,
47        4444441,
48        4918923241323L,
49        -1,
50        -24351,
51        0x3333,
52        0x0000000080000000L,
53        0x7fffffffffffffffL,
54        0x8000000000000000L
55    };
56
57    static final long[] DIVISORS = {
58        1,
59        2,
60        17,
61        12342,
62        24123,
63        143444,
64        123444442344L,
65        -1,
66        -2,
67        -4423423234231423L,
68        0x0000000080000000L,
69        0x7fffffffffffffffL,
70        0x8000000000000000L
71    };
72
73    // Initialize DIVISOR so that it is final in this class.
74    static final long DIVISOR;
75
76    static {
77        long value = 0;
78        try {
79            value = Long.decode(System.getProperty("divisor"));
80        } catch (Throwable e) {
81        }
82        DIVISOR = value;
83    }
84
85    public static void main(String[] args) throws Exception
86    {
87        Class cl = Test6800154.class;
88        ClassLoader apploader = cl.getClassLoader();
89
90        // Iterate over all divisors.
91        for (int i = 0; i < DIVISORS.length; i++) {
92            System.setProperty("divisor", "" + DIVISORS[i]);
93            ClassLoader loader
94                    = Utils.getTestClassPathURLClassLoader(apploader.getParent());
95            Class c = loader.loadClass(Test6800154.class.getName());
96            Runnable r = (Runnable) c.newInstance();
97            r.run();
98        }
99    }
100
101    public void run()
102    {
103        // Iterate over all dividends.
104        for (int i = 0; i < DIVIDENDS.length; i++) {
105            long dividend = DIVIDENDS[i];
106
107            long expected = divint(dividend);
108            long result = divcomp(dividend);
109
110            if (result != expected)
111                throw new InternalError(dividend + " / " + DIVISOR + " failed: " + result + " != " + expected);
112        }
113    }
114
115    static long divint(long a)  { return a / DIVISOR; }
116    static long divcomp(long a) { return a / DIVISOR; }
117}
118