intermediate commit

Co-authored-by: SriRam Mudragada <iam-msr@users.noreply.github.com>

assignment-1/src/prime1.asm

@@ -0,0 +1,18 @@
+    .data
+n:x5x5x5 
+    59
+    .text
+main:
+    load %x0, $n, %x3
+    addi %x4, 2, %x4
+forloop:
+    div %x3, %x4, %x6
+    beq %x31, %x7, nonprime
+    addi %x4, 1, %x4
+    blt %x4, %x3, forloop
+prime:
+    addi %x5, 1, %x5
+    end
+nonprime:
+    subi %x5, 1, %x5
+    end

assignment-2/CS311_assignment2

@@ -0,0 +1 @@
+Subproject commit f483ee2c38c1a35be3533c9433f7375235295d10

assignment-6/bin/build.xml

@@ -1,39 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- WARNING: Eclipse auto-generated file.
-              Any modifications will be overwritten.
-              To include a user specific buildfile here, simply create one in the same
-              directory with the processing instruction <?eclipse.ant.import?>
-              as the first entry and export the buildfile again. --><project basedir="." default="build">
-    <property environment="env"/>
-    <property name="debuglevel" value="source,lines,vars"/>
-    <property name="target" value="1.8"/>
-    <property name="source" value="1.8"/>
-    <target name="init">
-        <mkdir dir="bin"/>
-        <copy includeemptydirs="false" todir="bin">
-            <fileset dir="src">
-                <exclude name="**/*.launch"/>
-                <exclude name="**/*.java"/>
-            </fileset>
-        </copy>
-    </target>
-    <target name="clean">
-        <delete dir="bin"/>
-    </target>
-    <target depends="clean" name="cleanall"/>
-    <target depends="build-subprojects,build-project" name="build"/>
-    <target name="build-subprojects"/>
-    <target depends="init" name="build-project">
-        <javac debug="true" debuglevel="${debuglevel}" destdir="bin" includeantruntime="false" source="${source}" target="${target}">
-            <src path="src"/>
-        </javac>
-    </target>
-    <target name="make-jar" depends="build">
-        <mkdir dir="jars"/>
-        <jar destfile="jars/simulator.jar" basedir="bin">
-            <manifest>
-                <attribute name="Main-Class" value="main.Main"/>
-            </manifest>
-        </jar>
-    </target>
-</project>

assignment-6/bin/configuration/config.xml

@@ -1,43 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
-<Configuration>
-	<FunctionalUnits>
-		<ALU>
-			<Count>2</Count>
-			<Latency>1</Latency>
-			<ReciprocalOfThroughput>1</ReciprocalOfThroughput>
-		</ALU>
-		<Multiplier>
-			<Count>1</Count>
-			<Latency>4</Latency>
-			<ReciprocalOfThroughput>1</ReciprocalOfThroughput>
-		</Multiplier>
-		<Divider>
-			<Count>1</Count>
-			<Latency>10</Latency>
-			<ReciprocalOfThroughput>1</ReciprocalOfThroughput>
-		</Divider>
-	</FunctionalUnits>
-	
-	<L1iCache>
-		<NumberOfLines>256</NumberOfLines>
-		<Latency>2</Latency>
-		<Associativity>4</Associativity>
-		<ReplacementPolicy>LRU</ReplacementPolicy>
-	</L1iCache>
-	
-	<L1dCache>
-		<NumberOfLines>256</NumberOfLines>
-		<Latency>2</Latency>
-		<Associativity>4</Associativity>
-		<ReplacementPolicy>LRU</ReplacementPolicy>
-	</L1dCache>
-	
-	<L2Cache>
-		<NumberOfLines>2048</NumberOfLines>
-		<Latency>10</Latency>
-		<Associativity>4</Associativity>
-		<ReplacementPolicy>LRU</ReplacementPolicy>
-	</L2Cache>
-	
-	<MainMemoryLatency>40</MainMemoryLatency>
-</Configuration>

assignment-6/bin/hello.txt

@@ -1,4 +0,0 @@
-Number of instructions executed = 6
-Number of cycles taken = 252
-Number of data hazards = 7
-Number of control hazards = 0

assignment-6/src/hello.txt

@@ -1,4 +1,4 @@
-Number of instructions executed = 263
+Number of instructions executed = 5
-Number of cycles taken = 13761
+Number of cycles taken = 224
-Number of data hazards = 203
+Number of data hazards = 5
-Number of control hazards = 164
+Number of control hazards = 0

assignment-6/src/processor/Processor.java

@@ -1,5 +1,6 @@
 package processor;
 
+import processor.memorysystem.Cache;
 import processor.memorysystem.MainMemory;
 import processor.pipeline.EX_IF_LatchType;
 import processor.pipeline.EX_MA_LatchType;
@@ -31,6 +32,8 @@ public class Processor {
 	Execute EXUnit;
 	MemoryAccess MAUnit;
 	RegisterWrite RWUnit;
+	Cache l1iCache;
+	Cache l1dCache;
 	
 	public Processor()
 	{
@@ -44,6 +47,9 @@ public class Processor {
 		EX_IF_Latch = new EX_IF_LatchType();
 		MA_RW_Latch = new MA_RW_LatchType();
 
+		l1iCache = new Cache(this, 1, 16);
+		l1dCache = new Cache(this, 4, 1024);
+		
 		IFUnit = new InstructionFetch(this, IF_EnableLatch, IF_OF_Latch, EX_IF_Latch);
 		OFUnit = new OperandFetch(this, IF_OF_Latch, OF_EX_Latch, IF_EnableLatch);
 		EXUnit = new Execute(this, OF_EX_Latch, EX_MA_Latch, EX_IF_Latch);
@@ -94,4 +100,12 @@ public class Processor {
 		return RWUnit;
 	}
 
+	public Cache getL1iCache() {
+		return l1iCache;
+	}
+
+	public Cache getL1dCache() {
+		return l1dCache;
+	}
+
 }

assignment-6/src/processor/memorysystem/Cache.java

@@ -0,0 +1,119 @@
+package processor.memorysystem;
+
+import generic.*;
+import processor.*;
+import configuration.Configuration;
+
+public class Cache implements Element {
+    boolean isPresent = true;
+    public int latency;
+    Processor containingProcessor;
+    int cache_size, miss_addr, line_size;
+    CacheLine[] cach;
+    int[] index;
+
+    public Cache(Processor containingProcessor, int latency, int cacheSize) {
+        
+        this.latency = latency;
+        this.cache_size = cacheSize;
+        this.line_size = (int) (Math.log(this.cache_size / 8) / Math.log(2));
+        this.containingProcessor = containingProcessor;
+        this.cach = new CacheLine[cache_size / 8];
+        for (int i = 0; i < cache_size / 8; i++)
+            this.cach[i] = new CacheLine();
+
+    }
+
+    private int[] getindextag(int addr){
+        String a = Integer.toBinaryString(addr);
+        for (int i = 0; i < 32 - a.length(); i++)
+            a = "0" + a;
+        int add_tag = Integer.parseInt(a.substring(0, a.length() - line_size), 2);
+        int temp_ind;
+        String ind = "0";
+        if (line_size == 0)
+            temp_ind = 0;
+        else
+            for (int i = 0; i < line_size; i++)
+                ind = ind + "1";
+            temp_ind = addr & Integer.parseInt(ind, 2);
+        return new int[]{temp_ind, add_tag};
+    }
+
+    public int cacheRead(int address) {
+        int index, tag;
+        int[] temp = getindextag(address);
+        index = temp[0];
+        tag = temp[1];
+
+        if (tag == cach[index].tag[0]) {
+            cach[index].least_recently_used = 1;
+            isPresent = true;
+            return cach[index].data[0];
+        } else if (tag == cach[index].tag[1]) {
+            cach[index].least_recently_used = 0;
+            isPresent = true;
+            return cach[index].data[1];
+        } else {
+            isPresent = false;
+            return -1;
+        }
+    }
+
+    public void WritetoCache(int address, int value) {
+        int index, tag;
+        int[] temp = getindextag(address);
+        index = temp[0];
+        tag = temp[1];
+
+        cach[index].setValue(tag, value);
+
+    }
+
+    @Override
+    public void handleEvent(Event source_event) {
+
+        if (source_event.getEventType() == Event.EventType.MemoryRead) {
+            System.out.println("handle event cache memory read");
+            MemoryReadEvent handle_event = (MemoryReadEvent) source_event;
+            int data = cacheRead(handle_event.getAddressToReadFrom());
+            if (isPresent == true) {
+                Simulator.getEventQueue().addEvent(
+                        new MemoryResponseEvent(
+                                Clock.getCurrentTime() + this.latency,
+                                this,
+                                handle_event.getRequestingElement(),
+                                data));
+            } else {
+                handle_event.setEventTime(Clock.getCurrentTime() + Configuration.mainMemoryLatency + 1);
+                this.miss_addr = handle_event.getAddressToReadFrom();
+                Simulator.getEventQueue().addEvent(handle_event);
+                Simulator.getEventQueue().addEvent(
+                new MemoryReadEvent(
+                        Clock.getCurrentTime() + Configuration.mainMemoryLatency,
+                        this,
+                        containingProcessor.getMainMemory(),
+                        this.miss_addr)
+                );
+            }
+        }
+        else if (source_event.getEventType() == Event.EventType.MemoryWrite) {
+            MemoryWriteEvent handle_event = (MemoryWriteEvent) source_event;
+            WritetoCache(handle_event.getAddressToWriteTo(), handle_event.getValue());
+
+            containingProcessor.getMainMemory().setWord(handle_event.getAddressToWriteTo(), handle_event.getValue());
+
+            Simulator.getEventQueue().addEvent(
+                    new ExecutionCompleteEvent(
+                            Clock.getCurrentTime() + Configuration.mainMemoryLatency,
+                            containingProcessor.getMainMemory(),
+                            handle_event.getRequestingElement()));
+
+        }
+        else if (source_event.getEventType() == Event.EventType.MemoryResponse) {
+            MemoryResponseEvent handle_event = (MemoryResponseEvent) source_event;
+            WritetoCache(this.miss_addr, handle_event.getValue());
+        }
+    }
+
+}

assignment-6/src/processor/memorysystem/CacheLine.java

@@ -0,0 +1,30 @@
+package processor.memorysystem;
+
+
+public class CacheLine{
+    int[] tag = new int[2]; 
+    int[] data = new int[2];
+    int least_recently_used = 0;
+
+    public CacheLine() {
+        this.tag[0] = -1;
+        this.tag[1] = -1;
+    }
+
+    public void setValue(int tag, int value) {
+        if(tag == this.tag[0]) {
+            this.data[0] = value;
+            this.least_recently_used = 1;
+        }
+        else if(tag == this.tag[1]) {
+            this.data[1] = value;
+            this.least_recently_used = 0;
+        }
+        else {
+            this.tag[this.least_recently_used] = tag;
+            this.data[this.least_recently_used] = value;
+            this.least_recently_used = 1- this.least_recently_used;
+        }
+	}
+
+}

assignment-6/src/processor/pipeline/InstructionFetch.java

@@ -1,6 +1,5 @@
 package processor.pipeline;
 
-import configuration.Configuration;
 import generic.Element;
 import generic.Event;
 import generic.MemoryReadEvent;
@@ -33,13 +32,13 @@ public class InstructionFetch implements Element{
 
 				Simulator.getEventQueue().addEvent(
 						new MemoryReadEvent(
-								Clock.getCurrentTime()+Configuration.mainMemoryLatency,
+								Clock.getCurrentTime() + containingProcessor.getL1iCache().latency,
 								this,
-								containingProcessor.getMainMemory(),
+								containingProcessor.getL1iCache(),
 								currentPC
 								)
 						);
-				System.out.println("H1");
+				// System.out.println("H1");
 				IF_OF_Latch.setIF_branching_busy(true);
 
 
@@ -58,9 +57,9 @@ public class InstructionFetch implements Element{
 					
 					Simulator.getEventQueue().addEvent(
 						new MemoryReadEvent(
-							Clock.getCurrentTime()+ Configuration.mainMemoryLatency,
+							Clock.getCurrentTime()+ containingProcessor.getL1iCache().latency,
 							this,
-							containingProcessor.getMainMemory(),
+							containingProcessor.getL1iCache(),
 							currentPC
 						)
 					);

assignment-6/src/processor/pipeline/MemoryAccess.java

@@ -1,6 +1,5 @@
 package processor.pipeline;
 
-import configuration.Configuration;
 import generic.Element;
 import generic.Event;
 import generic.ExecutionCompleteEvent;
@@ -41,9 +40,9 @@ public class MemoryAccess implements Element {
 				instruction.getSourceOperand1().getValue());
 				Simulator.getEventQueue().addEvent(
 					new MemoryWriteEvent(
-						Clock.getCurrentTime()+Configuration.mainMemoryLatency,
+						Clock.getCurrentTime()+containingProcessor.getL1dCache().latency,
 						this,
-						containingProcessor.getMainMemory(),
+						containingProcessor.getL1dCache(),
 						alu_result,
 						val_store
 					)
@@ -55,9 +54,9 @@ public class MemoryAccess implements Element {
 			{
 				Simulator.getEventQueue().addEvent(
 					new MemoryReadEvent(
-						Clock.getCurrentTime()+Configuration.mainMemoryLatency,
+						Clock.getCurrentTime()+containingProcessor.getL1dCache().latency,
 						this,
-						containingProcessor.getMainMemory(),
+						containingProcessor.getL1dCache(),
 						alu_result
 						)
 				);