[O] Reformat code
This commit is contained in:
Hykilpikonna
@@ -1,11 +1,11 @@
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package mars.mips.hardware;
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package mars.mips.hardware;
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import java.util.Observer;
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import mars.Globals;
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import mars.assembler.SymbolTable;
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import mars.mips.instructions.Instruction;
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import mars.util.Binary;
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import mars.Globals;
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import mars.assembler.SymbolTable;
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import mars.mips.instructions.Instruction;
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import mars.util.Binary;
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import java.util.Observer;
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/*
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Copyright (c) 2003-2008, Pete Sanderson and Kenneth Vollmar
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@@ -36,304 +36,360 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/**
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* Represents the collection of MIPS registers.
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* @author Jason Bumgarner, Jason Shrewsbury
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* @version June 2003
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**/
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* Represents the collection of MIPS registers.
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*
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* @author Jason Bumgarner, Jason Shrewsbury
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* @version June 2003
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**/
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public class RegisterFile {
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public static final int GLOBAL_POINTER_REGISTER = 28;
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public static final int STACK_POINTER_REGISTER = 29;
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private static Register [] regFile =
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{ new Register("$zero", 0, 0), new Register("$at", 1, 0),
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new Register("$v0", 2, 0),new Register("$v1", 3, 0),
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new Register("$a0", 4, 0),new Register("$a1", 5, 0),
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new Register("$a2", 6, 0),new Register("$a3", 7, 0),
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new Register("$t0", 8, 0),new Register("$t1", 9, 0),
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new Register("$t2", 10, 0),new Register("$t3", 11, 0),
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new Register("$t4", 12, 0),new Register("$t5", 13, 0),
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new Register("$t6", 14, 0),new Register("$t7", 15, 0),
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new Register("$s0", 16, 0),new Register("$s1", 17, 0),
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new Register("$s2", 18, 0),new Register("$s3", 19, 0),
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new Register("$s4", 20, 0),new Register("$s5", 21, 0),
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new Register("$s6", 22, 0),new Register("$s7", 23, 0),
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new Register("$t8", 24, 0),new Register("$t9", 25, 0),
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new Register("$k0", 26, 0),new Register("$k1", 27, 0),
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new Register("$gp", GLOBAL_POINTER_REGISTER, Memory.globalPointer),
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new Register("$sp", STACK_POINTER_REGISTER, Memory.stackPointer),
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new Register("$fp", 30, 0),new Register("$ra", 31, 0)
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};
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private static Register programCounter= new Register("pc", 32, Memory.textBaseAddress);
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private static Register hi= new Register("hi", 33, 0);//this is an internal register with arbitrary number
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private static Register lo= new Register("lo", 34, 0);// this is an internal register with arbitrary number
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/**
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* Method for displaying the register values for debugging.
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**/
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public static void showRegisters(){
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for (int i=0; i< regFile.length; i++){
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public class RegisterFile
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{
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public static final int GLOBAL_POINTER_REGISTER = 28;
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public static final int STACK_POINTER_REGISTER = 29;
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private static final Register[] regFile =
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{new Register("$zero", 0, 0), new Register("$at", 1, 0),
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new Register("$v0", 2, 0), new Register("$v1", 3, 0),
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new Register("$a0", 4, 0), new Register("$a1", 5, 0),
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new Register("$a2", 6, 0), new Register("$a3", 7, 0),
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new Register("$t0", 8, 0), new Register("$t1", 9, 0),
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new Register("$t2", 10, 0), new Register("$t3", 11, 0),
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new Register("$t4", 12, 0), new Register("$t5", 13, 0),
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new Register("$t6", 14, 0), new Register("$t7", 15, 0),
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new Register("$s0", 16, 0), new Register("$s1", 17, 0),
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new Register("$s2", 18, 0), new Register("$s3", 19, 0),
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new Register("$s4", 20, 0), new Register("$s5", 21, 0),
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new Register("$s6", 22, 0), new Register("$s7", 23, 0),
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new Register("$t8", 24, 0), new Register("$t9", 25, 0),
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new Register("$k0", 26, 0), new Register("$k1", 27, 0),
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new Register("$gp", GLOBAL_POINTER_REGISTER, Memory.globalPointer),
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new Register("$sp", STACK_POINTER_REGISTER, Memory.stackPointer),
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new Register("$fp", 30, 0), new Register("$ra", 31, 0)
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};
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private static final Register programCounter = new Register("pc", 32, Memory.textBaseAddress);
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private static final Register hi = new Register("hi", 33, 0);//this is an internal register with arbitrary number
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private static final Register lo = new Register("lo", 34, 0);// this is an internal register with arbitrary number
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/**
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* Method for displaying the register values for debugging.
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**/
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public static void showRegisters()
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{
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for (int i = 0; i < regFile.length; i++)
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{
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System.out.println("Name: " + regFile[i].getName());
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System.out.println("Number: " + regFile[i].getNumber());
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System.out.println("Value: " + regFile[i].getValue());
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System.out.println("");
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}
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}
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/**
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* This method updates the register value who's number is num. Also handles the lo and hi registers
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* @param num Register to set the value of.
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* @param val The desired value for the register.
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**/
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public static int updateRegister(int num, int val){
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int old = 0;
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if(num == 0){
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System.out.println("Value: " + regFile[i].getValue());
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System.out.println();
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}
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}
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/**
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* This method updates the register value who's number is num. Also handles the lo and hi registers
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*
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* @param num Register to set the value of.
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* @param val The desired value for the register.
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**/
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public static int updateRegister(int num, int val)
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{
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int old = 0;
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if (num == 0)
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{
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//System.out.println("You can not change the value of the zero register.");
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}
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else {
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for (int i=0; i< regFile.length; i++){
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if(regFile[i].getNumber()== num) {
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old = (Globals.getSettings().getBackSteppingEnabled())
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? Globals.program.getBackStepper().addRegisterFileRestore(num,regFile[i].setValue(val))
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: regFile[i].setValue(val);
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break;
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}
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}
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else
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{
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for (int i = 0; i < regFile.length; i++)
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{
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if (regFile[i].getNumber() == num)
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{
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old = (Globals.getSettings().getBackSteppingEnabled())
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? Globals.program.getBackStepper().addRegisterFileRestore(num, regFile[i].setValue(val))
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: regFile[i].setValue(val);
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break;
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}
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}
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}
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if(num== 33){//updates the hi register
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}
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if (num == 33)
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{//updates the hi register
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old = (Globals.getSettings().getBackSteppingEnabled())
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? Globals.program.getBackStepper().addRegisterFileRestore(num,hi.setValue(val))
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: hi.setValue(val);
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}
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else if(num== 34){// updates the low register
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? Globals.program.getBackStepper().addRegisterFileRestore(num, hi.setValue(val))
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: hi.setValue(val);
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}
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else if (num == 34)
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{// updates the low register
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old = (Globals.getSettings().getBackSteppingEnabled())
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? Globals.program.getBackStepper().addRegisterFileRestore(num,lo.setValue(val))
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: lo.setValue(val);
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}
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return old;
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}
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/**
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* Sets the value of the register given to the value given.
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* @param reg Name of register to set the value of.
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* @param val The desired value for the register.
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**/
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public static void updateRegister(String reg, int val){
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if(reg.equals("zero")){
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? Globals.program.getBackStepper().addRegisterFileRestore(num, lo.setValue(val))
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: lo.setValue(val);
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}
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return old;
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}
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/**
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* Sets the value of the register given to the value given.
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*
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* @param reg Name of register to set the value of.
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* @param val The desired value for the register.
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**/
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public static void updateRegister(String reg, int val)
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{
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if (reg.equals("zero"))
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{
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//System.out.println("You can not change the value of the zero register.");
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}
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else{
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for (int i=0; i< regFile.length; i++){
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if(regFile[i].getName().equals(reg)) {
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updateRegister(i,val);
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break;
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}
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}}
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}
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/**
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* Returns the value of the register who's number is num.
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* @param num The register number.
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* @return The value of the given register.
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**/
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public static int getValue(int num){
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if(num==33){
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}
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else
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{
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for (int i = 0; i < regFile.length; i++)
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{
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if (regFile[i].getName().equals(reg))
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{
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updateRegister(i, val);
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break;
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}
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}
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}
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}
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/**
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* Returns the value of the register who's number is num.
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*
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* @param num The register number.
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* @return The value of the given register.
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**/
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public static int getValue(int num)
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{
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if (num == 33)
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{
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return hi.getValue();
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}
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else if(num==34){
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}
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else if (num == 34)
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{
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return lo.getValue();
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}
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else
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}
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else
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{
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return regFile[num].getValue();
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}
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/**
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* For getting the number representation of the register.
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* @param n The string formatted register name to look for.
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* @return The number of the register represented by the string
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* or -1 if no match.
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**/
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public static int getNumber(String n){
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int j=-1;
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for (int i=0; i< regFile.length; i++){
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if(regFile[i].getName().equals(n)) {
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j= regFile[i].getNumber();
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break;
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}
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}
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/**
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* For getting the number representation of the register.
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*
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* @param n The string formatted register name to look for.
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* @return The number of the register represented by the string or -1 if no match.
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**/
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public static int getNumber(String n)
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{
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int j = -1;
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for (int i = 0; i < regFile.length; i++)
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{
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if (regFile[i].getName().equals(n))
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{
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j = regFile[i].getNumber();
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break;
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}
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}
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return j;
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}
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/**
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* For returning the set of registers.
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* @return The set of registers.
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**/
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public static Register[] getRegisters(){
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return regFile;
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}
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/**
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* Get register object corresponding to given name. If no match, return null.
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* @param Rname The register name, either in $0 or $zero format.
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* @return The register object,or null if not found.
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**/
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public static Register getUserRegister(String Rname) {
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Register reg = null;
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if (Rname.charAt(0) == '$') {
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try {
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// check for register number 0-31.
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reg = regFile[Binary.stringToInt(Rname.substring(1))]; // KENV 1/6/05
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}
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return j;
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}
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/**
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* For returning the set of registers.
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*
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* @return The set of registers.
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**/
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public static Register[] getRegisters()
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{
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return regFile;
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}
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/**
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* Get register object corresponding to given name. If no match, return null.
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*
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* @param Rname The register name, either in $0 or $zero format.
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* @return The register object,or null if not found.
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**/
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public static Register getUserRegister(String Rname)
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{
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Register reg = null;
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if (Rname.charAt(0) == '$')
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{
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try
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{
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// check for register number 0-31.
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reg = regFile[Binary.stringToInt(Rname.substring(1))]; // KENV 1/6/05
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}
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catch (Exception e) {
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// handles both NumberFormat and ArrayIndexOutOfBounds
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// check for register mnemonic $zero thru $ra
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reg = null; // just to be sure
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// just do linear search; there aren't that many registers
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for (int i=0; i < regFile.length; i++) {
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if (Rname.equals(regFile[i].getName())) {
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catch (Exception e)
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{
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// handles both NumberFormat and ArrayIndexOutOfBounds
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// check for register mnemonic $zero thru $ra
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reg = null; // just to be sure
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// just do linear search; there aren't that many registers
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for (int i = 0; i < regFile.length; i++)
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{
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if (Rname.equals(regFile[i].getName()))
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{
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reg = regFile[i];
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break;
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}
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}
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}
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}
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return reg;
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}
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/**
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* For initializing the Program Counter. Do not use this to implement jumps and
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* branches, as it will NOT record a backstep entry with the restore value.
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* If you need backstepping capability, use setProgramCounter instead.
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* @param value The value to set the Program Counter to.
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**/
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public static void initializeProgramCounter(int value){
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programCounter.setValue(value);
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}
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/**
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* Will initialize the Program Counter to either the default reset value, or the address
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* associated with source program global label "main", if it exists as a text segment label
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* and the global setting is set.
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* @param startAtMain If true, will set program counter to address of statement labeled
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* 'main' (or other defined start label) if defined. If not defined, or if parameter false,
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* will set program counter to default reset value.
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**/
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public static void initializeProgramCounter(boolean startAtMain) {
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int mainAddr = Globals.symbolTable.getAddress(SymbolTable.getStartLabel());
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if (startAtMain && mainAddr != SymbolTable.NOT_FOUND && (Memory.inTextSegment(mainAddr) || Memory.inKernelTextSegment(mainAddr))) {
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}
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}
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}
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}
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return reg;
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}
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/**
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* For initializing the Program Counter. Do not use this to implement jumps and branches, as it will NOT record a
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* backstep entry with the restore value. If you need backstepping capability, use setProgramCounter instead.
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*
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* @param value The value to set the Program Counter to.
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**/
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public static void initializeProgramCounter(int value)
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{
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programCounter.setValue(value);
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}
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/**
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* Will initialize the Program Counter to either the default reset value, or the address associated with source
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* program global label "main", if it exists as a text segment label and the global setting is set.
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*
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* @param startAtMain If true, will set program counter to address of statement labeled 'main' (or other defined
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* start label) if defined. If not defined, or if parameter false, will set program counter to default reset
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* value.
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**/
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public static void initializeProgramCounter(boolean startAtMain)
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{
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int mainAddr = Globals.symbolTable.getAddress(SymbolTable.getStartLabel());
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if (startAtMain && mainAddr != SymbolTable.NOT_FOUND && (Memory.inTextSegment(mainAddr) || Memory.inKernelTextSegment(mainAddr)))
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{
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initializeProgramCounter(mainAddr);
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}
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else {
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}
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else
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{
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initializeProgramCounter(programCounter.getResetValue());
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}
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}
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/**
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* For setting the Program Counter. Note that ordinary PC update should be done using
|
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* incrementPC() method. Use this only when processing jumps and branches.
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* @param value The value to set the Program Counter to.
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* @return previous PC value
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**/
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public static int setProgramCounter(int value){
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int old = programCounter.getValue();
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programCounter.setValue(value);
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if (Globals.getSettings().getBackSteppingEnabled()) {
|
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}
|
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}
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/**
|
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* For setting the Program Counter. Note that ordinary PC update should be done using incrementPC() method. Use
|
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* this only when processing jumps and branches.
|
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*
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* @param value The value to set the Program Counter to.
|
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* @return previous PC value
|
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**/
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public static int setProgramCounter(int value)
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{
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int old = programCounter.getValue();
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programCounter.setValue(value);
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if (Globals.getSettings().getBackSteppingEnabled())
|
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{
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Globals.program.getBackStepper().addPCRestore(old);
|
||||
}
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return old;
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}
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|
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/**
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* For returning the program counters value.
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* @return The program counters value as an int.
|
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**/
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public static int getProgramCounter(){
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return programCounter.getValue();
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}
|
||||
|
||||
/**
|
||||
* Returns Register object for program counter. Use with caution.
|
||||
* @return program counter's Register object.
|
||||
*/
|
||||
public static Register getProgramCounterRegister() {
|
||||
return programCounter;
|
||||
}
|
||||
|
||||
/**
|
||||
* For returning the program counter's initial (reset) value.
|
||||
* @return The program counter's initial value
|
||||
**/
|
||||
|
||||
public static int getInitialProgramCounter(){
|
||||
return programCounter.getResetValue();
|
||||
}
|
||||
|
||||
/**
|
||||
* Method to reinitialize the values of the registers.
|
||||
* <b>NOTE:</b> Should <i>not</i> be called from command-mode MARS because this
|
||||
* this method uses global settings from the registry. Command-mode must operate
|
||||
* using only the command switches, not registry settings. It can be called
|
||||
* from tools running stand-alone, and this is done in
|
||||
* <code>AbstractMarsToolAndApplication</code>.
|
||||
**/
|
||||
|
||||
public static void resetRegisters(){
|
||||
for(int i=0; i< regFile.length; i++){
|
||||
}
|
||||
return old;
|
||||
}
|
||||
|
||||
/**
|
||||
* For returning the program counters value.
|
||||
*
|
||||
* @return The program counters value as an int.
|
||||
**/
|
||||
|
||||
public static int getProgramCounter()
|
||||
{
|
||||
return programCounter.getValue();
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns Register object for program counter. Use with caution.
|
||||
*
|
||||
* @return program counter's Register object.
|
||||
*/
|
||||
public static Register getProgramCounterRegister()
|
||||
{
|
||||
return programCounter;
|
||||
}
|
||||
|
||||
/**
|
||||
* For returning the program counter's initial (reset) value.
|
||||
*
|
||||
* @return The program counter's initial value
|
||||
**/
|
||||
|
||||
public static int getInitialProgramCounter()
|
||||
{
|
||||
return programCounter.getResetValue();
|
||||
}
|
||||
|
||||
/**
|
||||
* Method to reinitialize the values of the registers.
|
||||
* <b>NOTE:</b> Should <i>not</i> be called from command-mode MARS because this
|
||||
* this method uses global settings from the registry. Command-mode must operate using only the command switches,
|
||||
* not registry settings. It can be called from tools running stand-alone, and this is done in
|
||||
* <code>AbstractMarsToolAndApplication</code>.
|
||||
**/
|
||||
|
||||
public static void resetRegisters()
|
||||
{
|
||||
for (int i = 0; i < regFile.length; i++)
|
||||
{
|
||||
regFile[i].resetValue();
|
||||
}
|
||||
initializeProgramCounter(Globals .getSettings().getStartAtMain());// replaces "programCounter.resetValue()", DPS 3/3/09
|
||||
hi.resetValue();
|
||||
lo.resetValue();
|
||||
}
|
||||
|
||||
/**
|
||||
* Method to increment the Program counter in the general case (not a jump or branch).
|
||||
**/
|
||||
|
||||
public static void incrementPC(){
|
||||
programCounter.setValue(programCounter.getValue() + Instruction.INSTRUCTION_LENGTH);
|
||||
}
|
||||
|
||||
/**
|
||||
* Each individual register is a separate object and Observable. This handy method
|
||||
* will add the given Observer to each one. Currently does not apply to Program
|
||||
* Counter.
|
||||
*/
|
||||
public static void addRegistersObserver(Observer observer) {
|
||||
for (int i=0; i<regFile.length; i++) {
|
||||
}
|
||||
initializeProgramCounter(Globals.getSettings().getStartAtMain());// replaces "programCounter.resetValue()", DPS 3/3/09
|
||||
hi.resetValue();
|
||||
lo.resetValue();
|
||||
}
|
||||
|
||||
/**
|
||||
* Method to increment the Program counter in the general case (not a jump or branch).
|
||||
**/
|
||||
|
||||
public static void incrementPC()
|
||||
{
|
||||
programCounter.setValue(programCounter.getValue() + Instruction.INSTRUCTION_LENGTH);
|
||||
}
|
||||
|
||||
/**
|
||||
* Each individual register is a separate object and Observable. This handy method will add the given Observer to
|
||||
* each one. Currently does not apply to Program Counter.
|
||||
*/
|
||||
public static void addRegistersObserver(Observer observer)
|
||||
{
|
||||
for (int i = 0; i < regFile.length; i++)
|
||||
{
|
||||
regFile[i].addObserver(observer);
|
||||
}
|
||||
hi.addObserver(observer);
|
||||
lo.addObserver(observer);
|
||||
}
|
||||
|
||||
/**
|
||||
* Each individual register is a separate object and Observable. This handy method
|
||||
* will delete the given Observer from each one. Currently does not apply to Program
|
||||
* Counter.
|
||||
*/
|
||||
public static void deleteRegistersObserver(Observer observer) {
|
||||
for (int i=0; i<regFile.length; i++) {
|
||||
}
|
||||
hi.addObserver(observer);
|
||||
lo.addObserver(observer);
|
||||
}
|
||||
|
||||
/**
|
||||
* Each individual register is a separate object and Observable. This handy method will delete the given Observer
|
||||
* from each one. Currently does not apply to Program Counter.
|
||||
*/
|
||||
public static void deleteRegistersObserver(Observer observer)
|
||||
{
|
||||
for (int i = 0; i < regFile.length; i++)
|
||||
{
|
||||
regFile[i].deleteObserver(observer);
|
||||
}
|
||||
hi.deleteObserver(observer);
|
||||
lo.deleteObserver(observer);
|
||||
}
|
||||
}
|
||||
}
|
||||
hi.deleteObserver(observer);
|
||||
lo.deleteObserver(observer);
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user