1 /*
2 * Copyright (c) 2009, 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 6823354
27 * @summary These methods can be instrinsified by using bit scan, bit test, and population count instructions.
28 *
29 * @run main/othervm -Xcomp -XX:CompileOnly=Test6823354.lzcomp,Test6823354.tzcomp,.dolzcomp,.dotzcomp Test6823354
30 */
31
32 import java.net.URLClassLoader;
33
34 public class Test6823354 {
35 // Arrays of corner case values.
36 static final int[] ia = new int[] { 0, 1, -1, Integer.MIN_VALUE, Integer.MAX_VALUE };
37 static final long[] la = new long[] { 0L, 1L, -1L, Long.MIN_VALUE, Long.MAX_VALUE };
38
39 public static void main(String[] args) throws Exception {
40 // Load the classes and the methods.
41 Integer.numberOfLeadingZeros(0);
42 Integer.numberOfTrailingZeros(0);
43 Long.numberOfLeadingZeros(0);
44 Long.numberOfTrailingZeros(0);
45
46 lz();
47 tz();
48 }
49
50 static void lz() throws Exception {
51 // int
52
180 static int lzcomp(long l) { return Long.numberOfLeadingZeros(l); }
181
182 static int tzint( int i) { return Integer.numberOfTrailingZeros(i); }
183 static int tzcomp(int i) { return Integer.numberOfTrailingZeros(i); }
184
185 static int tzint( long l) { return Long.numberOfTrailingZeros(l); }
186 static int tzcomp(long l) { return Long.numberOfTrailingZeros(l); }
187
188 static void testclass(String classname, int x) throws Exception {
189 System.setProperty("value", "" + x);
190 loadandrunclass(classname);
191 }
192
193 static void testclass(String classname, long x) throws Exception {
194 System.setProperty("value", "" + x);
195 loadandrunclass(classname);
196 }
197
198 static void loadandrunclass(String classname) throws Exception {
199 Class cl = Class.forName(classname);
200 URLClassLoader apploader = (URLClassLoader) cl.getClassLoader();
201 ClassLoader loader = new URLClassLoader(apploader.getURLs(), apploader.getParent());
202 Class c = loader.loadClass(classname);
203 Runnable r = (Runnable) c.newInstance();
204 r.run();
205 }
206
207 public static class lzconI implements Runnable {
208 static final int VALUE;
209
210 static {
211 int value = 0;
212 try {
213 value = Integer.decode(System.getProperty("value"));
214 } catch (Throwable e) {}
215 VALUE = value;
216 }
217
218 public void run() { check(VALUE, lzint(VALUE), dolzcomp()); }
219 static int dolzcomp() { return lzcomp(VALUE); }
220 }
221
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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 6823354
27 * @summary These methods can be instrinsified by using bit scan, bit test, and population count instructions.
28 * @library /testlibrary
29 * @run main/othervm -Xcomp -XX:CompileOnly=Test6823354.lzcomp,Test6823354.tzcomp,.dolzcomp,.dotzcomp Test6823354
30 */
31
32 import jdk.test.lib.Utils;
33
34 public class Test6823354 {
35 // Arrays of corner case values.
36 static final int[] ia = new int[] { 0, 1, -1, Integer.MIN_VALUE, Integer.MAX_VALUE };
37 static final long[] la = new long[] { 0L, 1L, -1L, Long.MIN_VALUE, Long.MAX_VALUE };
38
39 public static void main(String[] args) throws Exception {
40 // Load the classes and the methods.
41 Integer.numberOfLeadingZeros(0);
42 Integer.numberOfTrailingZeros(0);
43 Long.numberOfLeadingZeros(0);
44 Long.numberOfTrailingZeros(0);
45
46 lz();
47 tz();
48 }
49
50 static void lz() throws Exception {
51 // int
52
180 static int lzcomp(long l) { return Long.numberOfLeadingZeros(l); }
181
182 static int tzint( int i) { return Integer.numberOfTrailingZeros(i); }
183 static int tzcomp(int i) { return Integer.numberOfTrailingZeros(i); }
184
185 static int tzint( long l) { return Long.numberOfTrailingZeros(l); }
186 static int tzcomp(long l) { return Long.numberOfTrailingZeros(l); }
187
188 static void testclass(String classname, int x) throws Exception {
189 System.setProperty("value", "" + x);
190 loadandrunclass(classname);
191 }
192
193 static void testclass(String classname, long x) throws Exception {
194 System.setProperty("value", "" + x);
195 loadandrunclass(classname);
196 }
197
198 static void loadandrunclass(String classname) throws Exception {
199 Class cl = Class.forName(classname);
200 ClassLoader apploader = cl.getClassLoader();
201 ClassLoader loader
202 = Utils.getTestClassPathURLClassLoader(apploader.getParent());
203 Class c = loader.loadClass(classname);
204 Runnable r = (Runnable) c.newInstance();
205 r.run();
206 }
207
208 public static class lzconI implements Runnable {
209 static final int VALUE;
210
211 static {
212 int value = 0;
213 try {
214 value = Integer.decode(System.getProperty("value"));
215 } catch (Throwable e) {}
216 VALUE = value;
217 }
218
219 public void run() { check(VALUE, lzint(VALUE), dolzcomp()); }
220 static int dolzcomp() { return lzcomp(VALUE); }
221 }
222
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