twisti@1210: /*
trims@1907:  * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
twisti@1210:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
twisti@1210:  *
twisti@1210:  * This code is free software; you can redistribute it and/or modify it
twisti@1210:  * under the terms of the GNU General Public License version 2 only, as
twisti@1210:  * published by the Free Software Foundation.
twisti@1210:  *
twisti@1210:  * This code is distributed in the hope that it will be useful, but WITHOUT
twisti@1210:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
twisti@1210:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
twisti@1210:  * version 2 for more details (a copy is included in the LICENSE file that
twisti@1210:  * accompanied this code).
twisti@1210:  *
twisti@1210:  * You should have received a copy of the GNU General Public License version
twisti@1210:  * 2 along with this work; if not, write to the Free Software Foundation,
twisti@1210:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
twisti@1210:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
twisti@1210:  */
twisti@1210: 
twisti@1210: /**
twisti@1210:  * @test
twisti@1210:  * @bug 6823354
twisti@1210:  * @summary These methods can be instrinsified by using bit scan, bit test, and population count instructions.
twisti@1210:  *
twisti@1210:  * @run main/othervm -Xcomp -XX:CompileOnly=Test6823354.lzcomp,Test6823354.tzcomp,.dolzcomp,.dotzcomp Test6823354
twisti@1210:  */
twisti@1210: 
twisti@1210: import java.net.URLClassLoader;
twisti@1210: 
twisti@1210: public class Test6823354 {
twisti@1210:     // Arrays of corner case values.
twisti@1210:     static final int[]  ia = new int[]  { 0,  1,  -1,  Integer.MIN_VALUE, Integer.MAX_VALUE };
twisti@1210:     static final long[] la = new long[] { 0L, 1L, -1L, Long.MIN_VALUE,    Long.MAX_VALUE    };
twisti@1210: 
twisti@1210:     public static void main(String[] args) throws Exception {
twisti@1210:         // Load the classes and the methods.
twisti@1210:         Integer.numberOfLeadingZeros(0);
twisti@1210:         Integer.numberOfTrailingZeros(0);
twisti@1210:         Long.numberOfLeadingZeros(0);
twisti@1210:         Long.numberOfTrailingZeros(0);
twisti@1210: 
twisti@1210:         lz();
twisti@1210:         tz();
twisti@1210:     }
twisti@1210: 
twisti@1210:     static void lz() throws Exception {
twisti@1210:         // int
twisti@1210: 
twisti@1210:         // Test corner cases.
twisti@1210:         for (int i = 0; i < ia.length; i++) {
twisti@1210:             int x = ia[i];
twisti@1210:             check(x, lzcomp(x), lzint(x));
twisti@1210:         }
twisti@1210: 
twisti@1210:         // Test all possible return values.
twisti@1210:         for (int i = 0; i < Integer.SIZE; i++) {
twisti@1210:             int x = 1 << i;
twisti@1210:             check(x, lzcomp(x), lzint(x));
twisti@1210:         }
twisti@1210: 
twisti@1210:         String classname = "Test6823354$lzconI";
twisti@1210: 
twisti@1210:         // Test Ideal optimizations (constant values).
twisti@1210:         for (int i = 0; i < ia.length; i++) {
twisti@1210:             testclass(classname, ia[i]);
twisti@1210:         }
twisti@1210: 
twisti@1210:         // Test Ideal optimizations (constant values).
twisti@1210:         for (int i = 0; i < Integer.SIZE; i++) {
twisti@1210:             int x = 1 << i;
twisti@1210:             testclass(classname, x);
twisti@1210:         }
twisti@1210: 
twisti@1210: 
twisti@1210:         // long
twisti@1210: 
twisti@1210:         // Test corner cases.
twisti@1210:         for (int i = 0; i < ia.length; i++) {
twisti@1210:             long x = la[i];
twisti@1210:             check(x, lzcomp(x), lzint(x));
twisti@1210:         }
twisti@1210: 
twisti@1210:         // Test all possible return values.
twisti@1210:         for (int i = 0; i < Long.SIZE; i++) {
twisti@1210:             long x = 1L << i;
twisti@1210:             check(x, lzcomp(x), lzint(x));
twisti@1210:         }
twisti@1210: 
twisti@1210:         classname = "Test6823354$lzconL";
twisti@1210: 
twisti@1210:         // Test Ideal optimizations (constant values).
twisti@1210:         for (int i = 0; i < la.length; i++) {
twisti@1210:             testclass(classname, la[i]);
twisti@1210:         }
twisti@1210: 
twisti@1210:         // Test Ideal optimizations (constant values).
twisti@1210:         for (int i = 0; i < Long.SIZE; i++) {
twisti@1210:             long x = 1L << i;
twisti@1210:             testclass(classname, x);
twisti@1210:         }
twisti@1210:     }
twisti@1210: 
twisti@1210:     static void tz() throws Exception {
twisti@1210:         // int
twisti@1210: 
twisti@1210:         // Test corner cases.
twisti@1210:         for (int i = 0; i < ia.length; i++) {
twisti@1210:             int x = ia[i];
twisti@1210:             check(x, tzcomp(x), tzint(x));
twisti@1210:         }
twisti@1210: 
twisti@1210:         // Test all possible return values.
twisti@1210:         for (int i = 0; i < Integer.SIZE; i++) {
twisti@1210:             int x = 1 << i;
twisti@1210:             check(x, tzcomp(x), tzint(x));
twisti@1210:         }
twisti@1210: 
twisti@1210:         String classname = "Test6823354$tzconI";
twisti@1210: 
twisti@1210:         // Test Ideal optimizations (constant values).
twisti@1210:         for (int i = 0; i < ia.length; i++) {
twisti@1210:             testclass(classname, ia[i]);
twisti@1210:         }
twisti@1210: 
twisti@1210:         // Test Ideal optimizations (constant values).
twisti@1210:         for (int i = 0; i < Integer.SIZE; i++) {
twisti@1210:             int x = 1 << i;
twisti@1210:             testclass(classname, x);
twisti@1210:         }
twisti@1210: 
twisti@1210: 
twisti@1210:         // long
twisti@1210: 
twisti@1210:         // Test corner cases.
twisti@1210:         for (int i = 0; i < la.length; i++) {
twisti@1210:             long x = la[i];
twisti@1210:             check(x, tzcomp(x), tzint(x));
twisti@1210:         }
twisti@1210: 
twisti@1210:         // Test all possible return values.
twisti@1210:         for (int i = 0; i < Long.SIZE; i++) {
twisti@1210:             long x = 1L << i;
twisti@1210:             check(x, tzcomp(x), tzint(x));
twisti@1210:         }
twisti@1210: 
twisti@1210:         classname = "Test6823354$tzconL";
twisti@1210: 
twisti@1210:         // Test Ideal optimizations (constant values).
twisti@1210:         for (int i = 0; i < la.length; i++) {
twisti@1210:             testclass(classname, la[i]);
twisti@1210:         }
twisti@1210: 
twisti@1210:         // Test Ideal optimizations (constant values).
twisti@1210:         for (int i = 0; i < Long.SIZE; i++) {
twisti@1210:             long x = 1L << i;
twisti@1210:             testclass(classname, x);
twisti@1210:         }
twisti@1210:     }
twisti@1210: 
twisti@1210:     static void check(int value, int result, int expected) {
twisti@1210:         //System.out.println(value + ": " + result + ", " + expected);
twisti@1210:         if (result != expected)
twisti@1210:             throw new InternalError(value + " failed: " + result + " != " + expected);
twisti@1210:     }
twisti@1210: 
twisti@1210:     static void check(long value, long result, long expected) {
twisti@1210:         //System.out.println(value + ": " + result + ", " + expected);
twisti@1210:         if (result != expected)
twisti@1210:             throw new InternalError(value + " failed: " + result + " != " + expected);
twisti@1210:     }
twisti@1210: 
twisti@1210:     static int lzint( int i)  { return Integer.numberOfLeadingZeros(i); }
twisti@1210:     static int lzcomp(int i)  { return Integer.numberOfLeadingZeros(i); }
twisti@1210: 
twisti@1210:     static int lzint( long l) { return Long.numberOfLeadingZeros(l); }
twisti@1210:     static int lzcomp(long l) { return Long.numberOfLeadingZeros(l); }
twisti@1210: 
twisti@1210:     static int tzint( int i)  { return Integer.numberOfTrailingZeros(i); }
twisti@1210:     static int tzcomp(int i)  { return Integer.numberOfTrailingZeros(i); }
twisti@1210: 
twisti@1210:     static int tzint( long l) { return Long.numberOfTrailingZeros(l); }
twisti@1210:     static int tzcomp(long l) { return Long.numberOfTrailingZeros(l); }
twisti@1210: 
twisti@1210:     static void testclass(String classname, int x) throws Exception {
twisti@1210:         System.setProperty("value", "" + x);
twisti@1210:         loadandrunclass(classname);
twisti@1210:     }
twisti@1210: 
twisti@1210:     static void testclass(String classname, long x) throws Exception {
twisti@1210:         System.setProperty("value", "" + x);
twisti@1210:         loadandrunclass(classname);
twisti@1210:     }
twisti@1210: 
twisti@1210:     static void loadandrunclass(String classname) throws Exception {
twisti@1210:         Class cl = Class.forName(classname);
twisti@1210:         URLClassLoader apploader = (URLClassLoader) cl.getClassLoader();
twisti@1210:         ClassLoader loader = new URLClassLoader(apploader.getURLs(), apploader.getParent());
twisti@1210:         Class c = loader.loadClass(classname);
twisti@1210:         Runnable r = (Runnable) c.newInstance();
twisti@1210:         r.run();
twisti@1210:     }
twisti@1210: 
twisti@1210:     public static class lzconI implements Runnable {
twisti@1210:         static final int VALUE;
twisti@1210: 
twisti@1210:         static {
twisti@1210:             int value = 0;
twisti@1210:             try {
twisti@1210:                 value = Integer.decode(System.getProperty("value"));
twisti@1210:             } catch (Throwable e) {}
twisti@1210:             VALUE = value;
twisti@1210:         }
twisti@1210: 
twisti@1210:         public void run() { check(VALUE, lzint(VALUE), dolzcomp()); }
twisti@1210:         static int dolzcomp() { return lzcomp(VALUE); }
twisti@1210:     }
twisti@1210: 
twisti@1210:     public static class lzconL implements Runnable {
twisti@1210:         static final long VALUE;
twisti@1210: 
twisti@1210:         static {
twisti@1210:             long value = 0;
twisti@1210:             try {
twisti@1210:                 value = Long.decode(System.getProperty("value"));
twisti@1210:             } catch (Throwable e) {}
twisti@1210:             VALUE = value;
twisti@1210:         }
twisti@1210: 
twisti@1210:         public void run() { check(VALUE, lzint(VALUE), dolzcomp()); }
twisti@1210:         static int dolzcomp() { return lzcomp(VALUE); }
twisti@1210:     }
twisti@1210: 
twisti@1210:     public static class tzconI implements Runnable {
twisti@1210:         static final int VALUE;
twisti@1210: 
twisti@1210:         static {
twisti@1210:             int value = 0;
twisti@1210:             try {
twisti@1210:                 value = Integer.decode(System.getProperty("value"));
twisti@1210:             } catch (Throwable e) {}
twisti@1210:             VALUE = value;
twisti@1210:         }
twisti@1210: 
twisti@1210:         public void run() { check(VALUE, tzint(VALUE), dotzcomp()); }
twisti@1210:         static int dotzcomp() { return tzcomp(VALUE); }
twisti@1210:     }
twisti@1210: 
twisti@1210:     public static class tzconL implements Runnable {
twisti@1210:         static final long VALUE;
twisti@1210: 
twisti@1210:         static {
twisti@1210:             long value = 0;
twisti@1210:             try {
twisti@1210:                 value = Long.decode(System.getProperty("value"));
twisti@1210:             } catch (Throwable e) {}
twisti@1210:             VALUE = value;
twisti@1210:         }
twisti@1210: 
twisti@1210:         public void run() { check(VALUE, tzint(VALUE), dotzcomp()); }
twisti@1210:         static int dotzcomp() { return tzcomp(VALUE); }
twisti@1210:     }
twisti@1210: }