code: // from gee.cs.oswego.edu/home/jsr166/jsr166
  
  package jsr166tests.jtreg.util.concurrent.atomic;
  
  /*
   * Copyright 2004 Sun Microsystems, Inc.  All Rights Reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
   *
   * This code is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   * version 2 for more details (a copy is included in the LICENSE file that
   * accompanied this code).
   *
   * You should have received a copy of the GNU General Public License version
   * 2 along with this work; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
   * CA 95054 USA or visit www.sun.com if you need additional information or
   * have any questions.
   */
  
  /*
   * @test
   * @bug 4992443 4994819
   * @compile -source 1.5 VMSupportsCS8.java
   * @run main VMSupportsCS8
   * @summary Checks that the value of VMSupportsCS8 matches system properties.
   */
  
  import java.lang.reflect.Field;
  
  public class VMSupportsCS8 {
      public static void main(String[] args) throws Exception {
          if (System.getProperty("sun.cpu.isalist").matches
              (".*\\b(sparcv9|pentium_pro|ia64|amd64).*")
              ||
              System.getProperty("os.arch").matches
              (".*\\b(ia64|amd64).*")) {
  
              System.out.println("This system is known to have hardware CS8");
  
              Class klass = Class.forName("java.util.concurrent.atomic.AtomicLong");
              Field field = klass.getDeclaredField("VM_SUPPORTS_LONG_CAS");
              field.setAccessible(true);
              boolean VMSupportsCS8 = field.getBoolean(null);
              if (! VMSupportsCS8)
                  throw new Exception("Unexpected value for VMSupportsCS8");
          }
      }
  }
  