code: /**
   * Copyright (c) 2007, Regents of the University of California
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * Redistributions of source code must retain the above copyright notice,
   * this list of conditions and the following disclaimer.
   *
   * Redistributions in binary form must reproduce the above copyright
   * notice, this list of conditions and the following disclaimer in the
   * documentation and/or other materials provided with the distribution.
   *
   * Neither the name of the University of California, Los Angeles nor the
   * names of its contributors may be used to endorse or promote products
   * derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   * Created Sep 1, 2007
   */
  package avrora.actions;
  
  import cck.util.Option;
  import cck.util.Arithmetic;
  import cck.text.*;
  import avrora.sim.state.*;
  
  /**
   * The <code>InternalTestAction</code> definition implements an action
   * that tests various simulation internals for correctness.
   *
   * @author Ben L. Titzer
   */
  public class RegisterTestAction extends Action {
      public static final String HELP = "The \"test\" action invokes the internal automated testing framework " +
              "that runs test cases supplied at the command line. The test cases are " +
              "used in regressions for diagnosing bugs.";
  
      public final Option.Bool DETAIL = newOption("detail", false, "This option selects whether " +
              "the testing framework will report detailed information for failed test cases.");
  
      protected boolean detail;
  
      public RegisterTestAction() {
          super(HELP);
      }
  
      /**
       * The <code>run()</code> method starts the test harness and begins processing test cases.
       * @param args the command line arguments; files containing tests to be run
       * @throws Exception
       */
      public void run(String[] args) throws Exception {
          detail = DETAIL.get();
  
          Register r1 = new Register(16);
          writeAndPrint("R1", r1, 0x89);
          writeAndPrint("R1", r1, 0x1189);
          writeAndPrint("R1", r1, 0x89);
          writeAndPrint("R1", r1, 0x1AC89);
  
          RegisterView r2 = RegisterUtil.bitRangeView(r1, 0, 15);
          r1.write(0x89);
          checkRegister("R2", r2, 0x89);
          r2.setValue(0x7a);
          checkRegister("R1", r1, 0x7a);
  
          Register r3 = new Register(8);
          Register r4 = new Register(8);
  
          RegisterView r5 = RegisterUtil.stackedView(r3, r4);
          r5.setValue(0xa3b7);
          checkRegister("R3", r3, 0xb7);
          checkRegister("R4", r4, 0xa3);
  
          RegisterView r6 = RegisterUtil.bitRangeView(r5, 4, 7);
          RegisterView r7 = RegisterUtil.bitRangeView(r5, 10, 15);
          r5.setValue(0xabcd);
          checkRegister("R6", r6, 0xc);
          r6.setValue(0x7);
          checkRegister("R5", r5, 0xab7d);
          checkRegister("R7", r7, 0x2a);
          r7.setValue(0xff);
          checkRegister("R5", r5, 0xff7d);
  
          assert Arithmetic.getBitMask(16) == 0xffff;
          assert Arithmetic.getBitMask(32) == 0xffffffff;
      }
  
      private void writeAndPrint(String name, Register r, int val) {
          r.write(val);
          checkRegister(name, r, val);
      }
  
      void checkRegister(String n, RegisterView r, int val) {
          int rw = r.getWidth();
          String rval = StringUtil.toMultirepString(r.getValue(), rw);
          if ( (val & Arithmetic.getBitMask(rw)) == r.getValue() ) {
              Terminal.printGreen(n);
              Terminal.print(": ");
              Terminal.printCyan(rval);
              Terminal.nextln();
          } else {
              Terminal.printRed(n);
              Terminal.print(": ");
              Terminal.printCyan(rval);
              Terminal.print(" != ");
              Terminal.printCyan(StringUtil.toMultirepString(val, rw));
              Terminal.nextln();
          }
      }
  }
  
  