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 * @library /test/lib
27 * @run main BitTwiddle
28 * @bug 4495754 8078672
29 * @summary Basic test for long bit twiddling (use -Dseed=X to set PRNG seed)
30 * @author Josh Bloch
31 * @key randomness
32 */
33
34 import java.util.Random;
35 import jdk.test.lib.RandomFactory;
36 import static java.lang.Long.*;
37
38 public class BitTwiddle {
39 private static final int N = 1000; // # of repetitions per test
40
41 public static void main(String args[]) {
42 Random rnd = RandomFactory.getRandom();
43
44 if (highestOneBit(0) != 0)
45 throw new RuntimeException("a");
46 if (highestOneBit(-1) != MIN_VALUE)
|
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 * @library /test/lib
27 * @build jdk.test.lib.RandomFactory
28 * @run main BitTwiddle
29 * @bug 4495754 8078672
30 * @summary Basic test for long bit twiddling (use -Dseed=X to set PRNG seed)
31 * @author Josh Bloch
32 * @key randomness
33 */
34
35 import java.util.Random;
36 import jdk.test.lib.RandomFactory;
37 import static java.lang.Long.*;
38
39 public class BitTwiddle {
40 private static final int N = 1000; // # of repetitions per test
41
42 public static void main(String args[]) {
43 Random rnd = RandomFactory.getRandom();
44
45 if (highestOneBit(0) != 0)
46 throw new RuntimeException("a");
47 if (highestOneBit(-1) != MIN_VALUE)
|