code: /*
   * Copyright (c) 2014, Aleksander Osman
   * 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.
   * 
   * 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 HOLDER 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.
   */
  
  package ao486.test.other;
  
  import ao486.test.TestUnit;
  import static ao486.test.TestUnit.run_test;
  import ao486.test.layers.FlagsLayer;
  import ao486.test.layers.GeneralRegisterLayer;
  import ao486.test.layers.HandleModeChangeLayer;
  import ao486.test.layers.IOLayer;
  import ao486.test.layers.InstructionLayer;
  import ao486.test.layers.Layer;
  import ao486.test.layers.MemoryLayer;
  import ao486.test.layers.OtherLayer;
  import ao486.test.layers.Pair;
  import ao486.test.layers.SegmentLayer;
  import ao486.test.layers.StackLayer;
  import java.io.*;
  import java.util.LinkedList;
  import java.util.Random;
  
  public class TestAddressingModes extends TestUnit implements Serializable {
      public static void main(String args[]) throws Exception {
          run_test(TestAddressingModes.class);
      }
      
      //--------------------------------------------------------------------------
      
      @Override
      public int get_test_count() throws Exception {
          //16-bit: 256
          //32-bit: 256-8*3 + 8*3*256 = 256 + 8*3*255
          
          return REPEAT * (256 + 256-8*3 + 8*3*256);
      }
      
      
      static final int REPEAT = 1;
      
      static int current_repeat      = 0;
      static int current_16bit       = 0;
      static int current_32bit       = 0;
      static int current_32bit_sib   = 0;
      
      static int current_run = 0;
      
      void update() {
          if(current_repeat == REPEAT-1) {
              current_repeat = 0;
  
              if(current_16bit == 256) {
  
                  if(current_32bit == 256-1) { System.out.println("[TestAddressingModes]: tested all."); }
                  else {
                      boolean sib = is_sib();
  
                      if(sib && current_32bit_sib == 256-1) {
                          current_32bit_sib = 0;
                          current_32bit++;
                      }
                      else if(sib) {
                          current_32bit_sib++;
                      }
                      else {
                          current_32bit++;
                      }
                  }
              }
              else current_16bit++;
          }
          else current_repeat++;
      }
      
      boolean is_sib() {
          return current_16bit == 256 && ((current_32bit >> 6) & 0x3) != 3 && (current_32bit & 0x7) == 4;
      }
      
      int modregrm_len() {
          boolean a16  = current_16bit < 256;
          int modregrm = (a16)? current_16bit : current_32bit;
          int mod      = (modregrm >> 6) & 3;
          int rm       = modregrm & 7;
          int base     = current_32bit_sib & 7;
          
          // d_CRx_DRx_condition ignored
          
          if(a16 && mod == 0 && rm == 6) return 3;
          if(a16 && mod == 1) return 2;
          if(a16 && mod == 2) return 3;
          if(a16) return 1;
          
          if(mod == 0 && rm == 5) return 5;
          if(mod == 0 && rm == 4 && base == 5) return 6;
          if(mod == 0 && rm == 4) return 2;
          if(mod == 1 && rm == 4) return 3;
          if(mod == 1) return 2;
          if(mod == 2 && rm == 4) return 6;
          if(mod == 2) return 5;
          
          return 1;
      }
      
      @Override
      public void init() throws Exception {
          
          random = new Random(10 + index);
          
  System.out.println("[current_repeat   (" + current_repeat    + ") " +
                     "[current_16bit    (" + current_16bit     + ") " +
                     "[current_32bit    (" + current_32bit     + ") " +
                     "[current_32bit_sib(" + current_32bit_sib + ")]");
      
          String instruction;
          layers.clear();
  
          LinkedList<Pair<Long, Long>> prohibited_list = new LinkedList<>();
  
          // if false: v8086 mode
          boolean is_real = true;
  
          InstructionLayer instr  = new InstructionLayer(random, prohibited_list, true);
          layers.add(instr);
          StackLayer stack        = new StackLayer(random, prohibited_list);
          layers.add(stack);
          layers.add(new OtherLayer(is_real ? OtherLayer.Type.REAL : OtherLayer.Type.PROTECTED_OR_V8086, random));
          layers.add(new FlagsLayer(is_real ? FlagsLayer.Type.RANDOM : FlagsLayer.Type.V8086, random));
          layers.add(new GeneralRegisterLayer(random));
          layers.add(new SegmentLayer(random));
          layers.add(new MemoryLayer(random));
          layers.add(new IOLayer(random));
          layers.addFirst(new HandleModeChangeLayer(
                  getInput("cr0_pe"),
                  getInput("vmflag"),
                  getInput("cs_rpl"),
                  getInput("cs_p"),
                  getInput("cs_s"),
                  getInput("cs_type")
          ));
          
          int d_b = 0;
          if(current_16bit == 256) d_b = 1;
          final int d_b_final = d_b;
          
          Layer layer = new Layer() {
              long cs_d_b()      { return d_b_final; }
          };
          layers.addFirst(layer);
          
          byte bytes[] = hexToBytes("000000000000000000000000000000");
          
          if(current_16bit < 256) bytes[1] = (byte)current_16bit;
          else                    bytes[1] = (byte)current_32bit;
          
          if(is_sib()) {
              bytes[2] = (byte)current_32bit_sib;
              for(int i=0; i<modregrm_len()-2; i++) bytes[3+i] = (byte)random.nextInt();
          }
          else {
              for(int i=0; i<modregrm_len()-1; i++) bytes[2+i] = (byte)random.nextInt();
          }
          
          int final_size = modregrm_len()+1;
          byte final_bytes[] = new byte[final_size];
          System.arraycopy(bytes, 0, final_bytes, 0, final_size);
          
          instruction = bytesToHex(final_bytes) + "0F0F0F0F0F0F0F";
          
          instr.add_instruction(instruction);
          
  System.out.println("[get_instructions: " + instruction + "]");
          
          //---------------------------------------------------------------------- update
          current_run++;
          if(current_run == 2) {
              update();
              current_run = 0;
          }
      }
  }
  