1 /*
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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
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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
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22  */
23 
24 /**
25  * @test
26  * @bug 6800154
27  * @summary Add comments to long_by_long_mulhi() for better understandability
28  *
29  * @run main/othervm -Xcomp -XX:CompileOnly=Test6800154.divcomp Test6800154
30  */
31 
32 import java.net.URLClassLoader;
33 
34 public class Test6800154 implements Runnable {
35     static final long[] DIVIDENDS = {
36         0,
37         1,
38         2,
39         1423487,
40         4444441,
41         4918923241323L,
42         -1,
43         -24351,
44         0x3333,
45         0x0000000080000000L,
46         0x7fffffffffffffffL,
47         0x8000000000000000L
48     };
49 
50     static final long[] DIVISORS = {
51         1,
52         2,
53         17,
54         12342,
55         24123,
56         143444,
57         123444442344L,
58         -1,
59         -2,
60         -4423423234231423L,
61         0x0000000080000000L,
62         0x7fffffffffffffffL,
63         0x8000000000000000L
64     };
65 
66     // Initialize DIVISOR so that it is final in this class.
67     static final long DIVISOR;
68 
69     static {
70         long value = 0;
71         try {
72             value = Long.decode(System.getProperty("divisor"));
73         } catch (Throwable e) {
74         }
75         DIVISOR = value;
76     }
77 
main(String[] args)78     public static void main(String[] args) throws Exception
79     {
80         Class cl = Class.forName("Test6800154");
81         URLClassLoader apploader = (URLClassLoader) cl.getClassLoader();
82 
83         // Iterate over all divisors.
84         for (int i = 0; i < DIVISORS.length; i++) {
85             System.setProperty("divisor", "" + DIVISORS[i]);
86             ClassLoader loader = new URLClassLoader(apploader.getURLs(), apploader.getParent());
87             Class c = loader.loadClass("Test6800154");
88             Runnable r = (Runnable) c.newInstance();
89             r.run();
90         }
91     }
92 
run()93     public void run()
94     {
95         // Iterate over all dividends.
96         for (int i = 0; i < DIVIDENDS.length; i++) {
97             long dividend = DIVIDENDS[i];
98 
99             long expected = divint(dividend);
100             long result = divcomp(dividend);
101 
102             if (result != expected)
103                 throw new InternalError(dividend + " / " + DIVISOR + " failed: " + result + " != " + expected);
104         }
105     }
106 
divint(long a)107     static long divint(long a)  { return a / DIVISOR; }
divcomp(long a)108     static long divcomp(long a) { return a / DIVISOR; }
109 }
110