done basic skeleton

.gitignore

@@ -1 +1,25 @@
 *.zip
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+replay_pid*

assignment-3/src/generic/Simulator.java

@@ -1,5 +1,8 @@
 package generic;
 
+import java.io.FileInputStream;
+import java.io.InputStream;
+
 import processor.Clock;
 import processor.Processor;
 
@@ -19,7 +22,6 @@ public class Simulator {
 	static void loadProgram(String assemblyProgramFile)
 	{
 		/*
-		 * TODO
 		 * 1. load the program into memory according to the program layout described
 		 *    in the ISA specification
 		 * 2. set PC to the address of the first instruction in the main
@@ -28,6 +30,37 @@ public class Simulator {
 		 *     x1 = 65535
 		 *     x2 = 65535
 		 */
+
+		try (
+			InputStream is = new FileInputStream(assemblyProgramFile);
+		){
+			int i = 0;
+			byte[] line = new byte[4];
+			boolean isFirstLine = true;
+			while(is.read(line) != -1) {
+				int value = 0;
+				for(int j = 0; j < 4; j++) {
+					value = (value << 8) | (line[j] & 0xff);
+				}
+				System.out.println(value);
+				if(isFirstLine) {
+					processor.getRegisterFile().setProgramCounter(value);
+					isFirstLine = false;
+				}else{
+					processor.getMainMemory().setWord(i, value);
+					i++;
+				}
+			}
+			processor.getRegisterFile().setValue(0, 0);
+			processor.getRegisterFile().setValue(1, 65535);
+			processor.getRegisterFile().setValue(2, 65535);
+
+			// Debug
+			System.out.println(processor.getRegisterFile().getProgramCounter());
+			System.out.println(processor.getMainMemory().getContentsAsString(0, 10));
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
 	}
 	
 	public static void simulate()
@@ -44,6 +77,8 @@ public class Simulator {
 			Clock.incrementClock();
 			processor.getRWUnit().performRW();
 			Clock.incrementClock();
+			Statistics.setNumberOfInstructions(Statistics.getNumberOfInstructions() + 1);
+			Statistics.setNumberOfCycles(Statistics.getNumberOfCycles() + 1);
 		}
 		
 		// TODO

assignment-3/src/generic/Statistics.java

@@ -27,13 +27,22 @@ public class Statistics {
 			Misc.printErrorAndExit(e.getMessage());
 		}
 	}
-	
 	// TODO write functions to update statistics
-	public void setNumberOfInstructions(int numberOfInstructions) {
+
+	public static int getNumberOfInstructions() 
+	{
+		return numberOfInstructions;
+	}
+	public static int getNumberOfCycles() 
+	{
+		return numberOfCycles;
+	}
+	public static void setNumberOfInstructions(int numberOfInstructions) 
+	{
 		Statistics.numberOfInstructions = numberOfInstructions;
 	}
-
+	public static void setNumberOfCycles(int numberOfCycles) {
-	public void setNumberOfCycles(int numberOfCycles) {
 		Statistics.numberOfCycles = numberOfCycles;
 	}
+
 }

assignment-3/src/processor/pipeline/EX_IF_LatchType.java

@@ -1,10 +1,27 @@
 package processor.pipeline;
 
 public class EX_IF_LatchType {
+	int pc;
+	boolean IF_enable;
 	
 	public EX_IF_LatchType()
 	{
-		
+		IF_enable = false;
 	}
 
+	public boolean isIF_enable() {
+		return IF_enable;
+	}
+
+	public void setIF_enable(boolean iF_enable) {
+		IF_enable = iF_enable;
+	}
+
+	public int getPC() {
+		return pc;
+	}
+
+	public void setPC(int pc) {
+		this.pc = pc;
+	}
 }

assignment-3/src/processor/pipeline/EX_MA_LatchType.java

@@ -1,14 +1,44 @@
 package processor.pipeline;
 
+import generic.Instruction;
+import generic.Operand;
+
 public class EX_MA_LatchType {
 	
 	boolean MA_enable;
+	Operand op2;
+	Instruction instruction;
+	int aluResult;
 	
 	public EX_MA_LatchType()
 	{
 		MA_enable = false;
 	}
 
+	public void setInstruction(Instruction instruction) {
+		this.instruction = instruction;
+	}
+
+	public Instruction getInstruction() {
+		return instruction;
+	}
+
+	public void setOp2(Operand op2) {
+		this.op2 = op2;
+	}
+
+	public Operand getOp2(){
+		return op2;
+	}
+
+	public void setALUResult(int aluResult) {
+		this.aluResult = aluResult;
+	}
+
+	public int getALUResult(){
+		return aluResult;
+	}
+
 	public boolean isMA_enable() {
 		return MA_enable;
 	}

assignment-3/src/processor/pipeline/Execute.java

@@ -1,6 +1,9 @@
 package processor.pipeline;
-
 import processor.Processor;
+import generic.Instruction;
+import generic.Instruction.OperationType;
+import generic.Simulator;
+import generic.Operand.OperandType;
 
 public class Execute {
 	Processor containingProcessor;
@@ -19,6 +22,106 @@ public class Execute {
 	public void performEX()
 	{
 		//TODO
-	}
+		if(OF_EX_Latch.isEX_enable())
+		{
+			int op1 = OF_EX_Latch.getOp1();
+			int op2 = OF_EX_Latch.getOp2();
+			int imm = OF_EX_Latch.getImm();
+			Instruction instruction = OF_EX_Latch.getInstruction();
+			int cur_pc = containingProcessor.getRegisterFile().getProgramCounter();
+			int alu_result = 0;
+			OperationType alu_op = OF_EX_Latch.getInstruction().getOperationType();
+			switch(alu_op)
+			{
+				case add: alu_result = op1 + op2; break;
+				case addi: alu_result = op1 + imm; break;
+				case sub: alu_result = op1 - op2; break;
+				case subi: alu_result = op1 - imm; break;
+				case mul: alu_result = op1 * op2; break;
+				case muli: alu_result = op1 * imm; break;
+				case div: alu_result = op1 / op2; break;
+				case divi: alu_result = op1 / imm; break;
+				case and: alu_result = op1 & op2; break;
+				case andi: alu_result = op1 & imm; break;
+				case or: alu_result = op1 | op2; break;
+				case ori: alu_result = op1 | imm; break;
+				case xor: alu_result = op1 ^ op2; break;
+				case xori: alu_result = op1 ^ imm; break;
+				case slt: alu_result= (op1 < op2) ? 1 : 0; break;
+				case slti: alu_result= (op1 < imm) ? 1 : 0; break;
+				case sll: alu_result = op1 << op2; break;
+				case slli: alu_result = op1 << imm; break;
+				case srl: alu_result = op1 >>> op2; break;
+				case srli: alu_result = op1 >>> imm; break;
+				case sra: alu_result = op1 >> op2; break;
+				case srai: alu_result = op1 >> imm; break;
+				case jmp:
+				{
+					OperandType optype = instruction.getDestinationOperand().getOperandType();
+					if (optype == OperandType.Register){
+						imm = containingProcessor.getRegisterFile().getValue(
+							instruction.getDestinationOperand().getValue());
+						}
+					else{
+						imm = OF_EX_Latch.getImm();
+						}
+					alu_result = cur_pc + imm;
+					EX_IF_Latch.setIF_enable(true);
+					EX_IF_Latch.setPC(alu_result);
+				}
+				break;
+				case beq:
+				{
+					if(op1 == op2)
+					{
+						alu_result = cur_pc + imm;
+						EX_IF_Latch.setIF_enable(true);
+						EX_IF_Latch.setPC(alu_result);
+					}
+				}
+				break;
+				case bne:
+				{
+					if(op1 != op2)
+					{
+						alu_result = cur_pc + imm;
+						EX_IF_Latch.setIF_enable(true);
+						EX_IF_Latch.setPC(alu_result);
+					}
+				}
+				break;
+				case blt:
+				{
+					if(op1 < op2)
+					{
+						alu_result = cur_pc + imm;
+						EX_IF_Latch.setIF_enable(true);
+						EX_IF_Latch.setPC(alu_result);
+					}
+				}
+				break;
+				case bgt:
+				{
+					if(op1 > op2)
+					{
+						alu_result = cur_pc + imm;
+						EX_IF_Latch.setIF_enable(true);
+						EX_IF_Latch.setPC(alu_result);
+					}
+				}
+				break;
+				case end:
+				{
+					Simulator.setSimulationComplete(true);
+				}
+				default:
+					break;
 				
+			}
+			EX_MA_Latch.setALUResult(alu_result);
+			EX_MA_Latch.setInstruction(OF_EX_Latch.getInstruction());
+			EX_MA_Latch.setMA_enable(true);
+			OF_EX_Latch.setEX_enable(false);
+		}
+	}
 }

assignment-3/src/processor/pipeline/MA_RW_LatchType.java

@@ -1,12 +1,18 @@
 package processor.pipeline;
 
+import generic.Instruction;
+
 public class MA_RW_LatchType {
 	
 	boolean RW_enable;
+	int aluResult;
+	int load_result;
+	Instruction instruction;
 
 	public MA_RW_LatchType()
 	{
 		RW_enable = false;
+
 	}
 
 	public boolean isRW_enable() {
@@ -17,4 +23,27 @@ public class MA_RW_LatchType {
 		RW_enable = rW_enable;
 	}
 
+    public void setALU_result(int alu_result) {
+		this.aluResult = alu_result;
+    }
+
+	public int getALU_result() {
+		return aluResult;
+	}
+
+	public void setLoad_result(int load_result) {
+		this.load_result = load_result;
+	}
+
+	public int getLoad_result() {
+		return load_result;
+	}
+
+	public void setInstruction(Instruction instruction) {
+		this.instruction = instruction;
+	}
+
+	public Instruction getInstruction() {
+		return instruction;
+	}
 }

assignment-3/src/processor/pipeline/MemoryAccess.java

@@ -1,6 +1,8 @@
 package processor.pipeline;
 
+import generic.Instruction;
 import processor.Processor;
+import generic.Instruction.OperationType;
 
 public class MemoryAccess {
 	Processor containingProcessor;
@@ -16,7 +18,28 @@ public class MemoryAccess {
 	
 	public void performMA()
 	{
-		//TODO
+		if(EX_MA_Latch.isMA_enable())
+		{
+			Instruction instruction = EX_MA_Latch.getInstruction();
+			int alu_result = EX_MA_Latch.getALUResult();
+			MA_RW_Latch.setALU_result(alu_result);
+			OperationType op_type = instruction.getOperationType();
+			if (op_type==OperationType.store)
+			{
+				int val_store = containingProcessor.getRegisterFile().getValue(
+				instruction.getSourceOperand1().getValue());
+				containingProcessor.getMainMemory().setWord(alu_result, val_store);
+			}
+			else if (op_type==OperationType.load)
+			{
+				int load_result = containingProcessor.getMainMemory().getWord(alu_result);
+				MA_RW_Latch.setLoad_result(load_result);
+			}
+			MA_RW_Latch.setInstruction(instruction);
+			MA_RW_Latch.setRW_enable(true);
+			EX_MA_Latch.setMA_enable(false);
+
+		}
 	}
 
 }

assignment-3/src/processor/pipeline/OF_EX_LatchType.java

@@ -1,14 +1,50 @@
 package processor.pipeline;
 
+import generic.Instruction;
+
 public class OF_EX_LatchType {
 	
 	boolean EX_enable;
+	Instruction instruction;
+	int op1, op2, imm;
 	
 	public OF_EX_LatchType()
 	{
 		EX_enable = false;
 	}
 
+	public void setInstruction(Instruction instruction) {
+		this.instruction = instruction;
+	}
+
+	public Instruction getInstruction() {
+		return instruction;
+	}
+
+	public void setOp1(int op1) {
+		this.op1 = op1;
+	}
+
+	public int getOp1() {
+		return op1;
+	}
+
+	public void setOp2(int op2) {
+		this.op2 = op2;
+	}
+
+	public int getOp2() {
+		return op2;
+	}
+
+	public void setImm(int imm) {
+		this.imm = imm;
+	}
+
+	public int getImm() {
+		return imm;
+	}
+
 	public boolean isEX_enable() {
 		return EX_enable;
 	}
@@ -17,4 +53,5 @@ public class OF_EX_LatchType {
 		EX_enable = eX_enable;
 	}
 
+
 }

assignment-3/src/processor/pipeline/OperandFetch.java

@@ -1,11 +1,17 @@
 package processor.pipeline;
 
+import java.util.Arrays;
+
+import generic.Instruction;
 import processor.Processor;
+import generic.Instruction.OperationType;
+import generic.Operand;
 
 public class OperandFetch {
 	Processor containingProcessor;
 	IF_OF_LatchType IF_OF_Latch;
 	OF_EX_LatchType OF_EX_Latch;
+	static OperationType[] opTypes = OperationType.values();
 	
 	public OperandFetch(Processor containingProcessor, IF_OF_LatchType iF_OF_Latch, OF_EX_LatchType oF_EX_Latch)
 	{
@@ -18,7 +24,79 @@ public class OperandFetch {
 	{
 		if(IF_OF_Latch.isOF_enable())
 		{
-			//TODO
+			int instruction = IF_OF_Latch.getInstruction();
+			Instruction instr = new Instruction();
+			String bin_instr = Integer.toBinaryString(instruction);
+			int opcode = Integer.parseInt(bin_instr.substring(0, 5), 2);
+			instr.setOperationType(opTypes[opcode]);
+			
+			int R3_type_operators[] = {0,2,4,6,8,10,12,14,16,18,20};
+			int R2I_type_operators[] = {1,3,5,7,9,11,13,15,17,19,21,22,23,25,26,27,28};
+			int R1I_type_operators[] = {24,29};
+
+			// if (bin_instr.length() < 32) {	// TODO: check if this is correct
+			// 	int diff = 32 - bin_instr.length();
+			// 	String zeros = "";
+			// 	for (int i = 0; i < diff; i++) {
+			// 		zeros += "0";
+			// 	}
+			// 	bin_instr = zeros + bin_instr;
+			// }
+
+			if (Arrays.asList(R3_type_operators).contains(opcode)){
+				Operand rs1 = new Operand();
+				Operand rs2 = new Operand();
+				Operand rd = new Operand();
+				rs1.setOperandType(Operand.OperandType.Register);
+				rs2.setOperandType(Operand.OperandType.Register);
+				rd.setOperandType(Operand.OperandType.Register);
+
+				rs1.setValue(Integer.parseInt(bin_instr.substring(5, 10), 2));
+				rs2.setValue(Integer.parseInt(bin_instr.substring(9, 14), 2));
+				rd.setValue(Integer.parseInt(bin_instr.substring(14, 19), 2));
+
+				int op1 = containingProcessor.getRegisterFile().getValue(rs1.getValue());
+				int op2 = containingProcessor.getRegisterFile().getValue(rs2.getValue());
+				
+				OF_EX_Latch.setInstruction(instr);
+				OF_EX_Latch.setOp1(op1);
+				OF_EX_Latch.setOp2(op2);
+				instr.setDestinationOperand(rd);
+				instr.setSourceOperand1(rs1);
+				instr.setSourceOperand2(rs2);
+			}
+			else if (Arrays.asList(R2I_type_operators).contains(opcode)){
+				Operand rs1 = new Operand();
+				Operand rd = new Operand();
+				rs1.setOperandType(Operand.OperandType.Register);
+				rd.setOperandType(Operand.OperandType.Register);
+
+				rs1.setValue(Integer.parseInt(bin_instr.substring(5, 10), 2));
+				rd.setValue(Integer.parseInt(bin_instr.substring(14, 19), 2));
+
+				int imm = Integer.parseInt(bin_instr.substring(19, 32), 2); // TODO: 2's complement
+
+				int op1 = containingProcessor.getRegisterFile().getValue(rs1.getValue());
+
+				OF_EX_Latch.setInstruction(instr);
+				OF_EX_Latch.setImm(imm);
+				OF_EX_Latch.setOp1(op1);
+
+				instr.setDestinationOperand(rd);
+				instr.setSourceOperand1(rs1);
+			}
+			else if (Arrays.asList(R1I_type_operators).contains(opcode)){
+				Operand rd = new Operand();
+				rd.setOperandType(Operand.OperandType.Register);
+				rd.setValue(Integer.parseInt(bin_instr.substring(5, 10), 2));
+
+				instr.setDestinationOperand(rd);
+
+				int imm = Integer.parseInt(bin_instr.substring(10, 32), 2); // TODO: 2's complement
+
+				OF_EX_Latch.setInstruction(instr);
+				OF_EX_Latch.setImm(imm);
+			}
 
 			IF_OF_Latch.setOF_enable(false);
 			OF_EX_Latch.setEX_enable(true);

assignment-3/src/processor/pipeline/RegisterWrite.java

@@ -2,6 +2,8 @@ package processor.pipeline;
 
 import generic.Simulator;
 import processor.Processor;
+import generic.Instruction;
+import generic.Instruction.OperationType;
 
 public class RegisterWrite {
 	Processor containingProcessor;
@@ -19,10 +21,29 @@ public class RegisterWrite {
 	{
 		if(MA_RW_Latch.isRW_enable())
 		{
-			//TODO
+			Instruction instruction = MA_RW_Latch.getInstruction();
-			
+			OperationType op_type = instruction.getOperationType();
-			// if instruction being processed is an end instruction, remember to call Simulator.setSimulationComplete(true);
+			int alu_result = MA_RW_Latch.getALU_result();
 
+			if (op_type==OperationType.load)
+			{
+				int load_result = MA_RW_Latch.getLoad_result();
+				int rd = instruction.getDestinationOperand().getValue();
+				containingProcessor.getRegisterFile().setValue(rd, load_result);
+			}
+			else if (op_type==OperationType.end)
+			{
+				Simulator.setSimulationComplete(true);
+			}
+			else
+			{
+				if (op_type!=OperationType.store && op_type!= OperationType.jmp && op_type!= OperationType.beq && op_type!=OperationType.bne && op_type!=OperationType.blt && op_type!=OperationType.bgt)
+				{
+					int rd = instruction.getDestinationOperand().getValue();
+					rd = instruction.getDestinationOperand().getValue();
+					containingProcessor.getRegisterFile().setValue(rd, alu_result);
+				}
+			}
 			MA_RW_Latch.setRW_enable(false);
 			IF_EnableLatch.setIF_enable(true);
 		}