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mahdihaghverdimahdihaghverdi
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Merge pull request mahdihaghverdi#4 from Sayed-Hossein-Hosseini/main
Complete the project and add the Logisim CPU file
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‎Assembler/Assembler/.idea/.gitignore

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‎Assembler/Assembler/Assembler.iml

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<?xml version="1.0" encoding="UTF-8"?>
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<module type="JAVA_MODULE" version="4">
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<component name="NewModuleRootManager" inherit-compiler-output="true">
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<exclude-output />
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<content url="file://$MODULE_DIR$">
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<sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
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</content>
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<orderEntry type="inheritedJdk" />
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<orderEntry type="sourceFolder" forTests="false" />
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</component>
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</module>

‎Assembler/Assembler/src/DecimalToBinary.java

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public class DecimalToBinary {
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public static String computing(String result) { // Decimal to Binary
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int number = Integer.parseInt(result);
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result = "";
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while(number > 0) {
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result = (number % 2) + result;
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number /= 2;
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}
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return result;
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}
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public static String extend(String result) { // extend to 21 bit
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result = computing(result);
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int siza = result.length();
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for (int i = 0; i < 21 - siza; i++) {
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result = "0" + result;
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}
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return result;
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}
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}

‎Assembler/Assembler/src/Instruction.java

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import java.util.HashMap;
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import java.util.Map;
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import java.util.Scanner;
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public class Instruction {
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private static String machineCode;
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private static Map<String, String> lable = new HashMap<>();
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public static String main(String instructs) {
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instructs = lable(instructs);
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String result = "";
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Scanner scanner = new Scanner(instructs);
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while (scanner.hasNextLine()) {
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result += instruct(scanner.nextLine()) + "\n";
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}
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return result;
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}
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private static String instruct(String instruct) {
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machineCode = "";
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instruct = instruct.trim();
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String[] type = instruct.split(" ", 2); // Command Type Separation
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String typeValidation = R_type.callOrder(type[0]); // To help with validation
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if (typeValidation != null) { // R-type
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String[] register = type[1].split(", ");
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machineCode += "000" + // OpCode
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RegisterFile.callRegister(register[0]) + // rs
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RegisterFile.callRegister(register[1]) + // rt
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RegisterFile.callRegister(register[2]) + // rd
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"00000000000000" + // Don't Care
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typeValidation; // Function
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} else { // V-type
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machineCode += V_type.callOrder(type[0]);
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if (type[0].equals("lw") || type[0].equals("sw")) { // sw & lw commands
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String[] register = type[1].split(", ");
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machineCode += RegisterFile.callRegister(register[0].substring(0, 3)) + // rs
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RegisterFile.callRegister(register[1].substring(register[1].indexOf('(') + 1, register[1].indexOf(')'))) + // rt
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DecimalToBinary.extend(register[1].substring(0, register[1].indexOf('('))); // immediate
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} else {
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String[] register = type[1].split(", ");
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if (type[0].equals("bnq")) { // bnq commands
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machineCode += RegisterFile.callRegister(register[0]) + // rs
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RegisterFile.callRegister(register[1]) + // rt
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DecimalToBinary.extend(lable.get(register[2].trim())); // immediate
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} else { // other commands
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machineCode += RegisterFile.callRegister(register[0]) + // rs
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RegisterFile.callRegister(register[1]) + // rt
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DecimalToBinary.extend(register[2]); // immediate
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}
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}
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}
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return machineCode;
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}
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private static String lable(String instructs) {
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Scanner scanner = new Scanner(instructs);
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String instruct = "";
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int count = 0;
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while (scanner.hasNextLine()) {
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String place = scanner.nextLine();
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if (place.indexOf(':') != -1) {
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lable.put(place.substring(0, place.indexOf(':')).trim(), Integer.toString(count)); // lables
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instruct += place.substring(place.indexOf(':') + 1) + "\n";
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} else {
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instruct += place + "\n";
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}
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count++;
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}
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return instruct;
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}
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}

‎Assembler/Assembler/src/Main.java

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import java.util.Scanner;
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public class Main {
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public static void main(String[] args) {
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Scanner scanner = new Scanner(System.in);
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System.out.println("*** Wellcome to Program to convert assembly language to machine code ***\n" +
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"Please enter the assembly instructions : \n" +
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"(Note: At the end of the commands, enter the word 'end')");
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String order = "";
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while (scanner.hasNextLine()) {
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String line = scanner.nextLine();
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if (!line.equals("end"))
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order += line + "\n";
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else
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break;
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}
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System.out.print(Instruction.main(order));
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}
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}
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/*
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You can enter the following commands as an example
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test :
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ori $t8, $t7, 15
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bnq $a1, $t3, Hossein
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ori $t5, $t2, 15
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add $t1, $t2, $a1
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Hossein: ori $l1, $t2, 15
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end
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*/

‎Assembler/Assembler/src/R_type.java

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import java.util.HashMap;
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import java.util.Map;
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public class R_type {
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private static Map <String,String> order = new HashMap<>();
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private static void addOrder() { // Specify machine code commands (Function)
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order.put("add", "001");
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order.put("sub", "010");
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order.put("mul", "011");
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order.put("and", "100");
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order.put("or", "101");
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order.put("nor", "110");
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order.put("nand", "111");
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}
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public static String callOrder(String name) {
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addOrder();
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return order.get(name);
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}
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}

‎Assembler/Assembler/src/RegisterFile.java

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import java.util.HashMap;
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import java.util.Map;
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public class RegisterFile {
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private static Map<String,String> register = new HashMap<>();
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private static void addRegister() {
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register.put("$zero", "0000");
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register.put("$at", "0001");
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register.put("$a1", "0010");
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register.put("$a2", "0011");
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register.put("$a3", "0100");
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register.put("$l1", "0101");
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register.put("$l2", "0110");
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register.put("$l3", "0111");
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register.put("$t1", "1000");
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register.put("$t2", "1001");
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register.put("$t3", "1010");
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register.put("$t4", "1011");
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register.put("$t5", "1100");
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register.put("$t6", "1101");
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register.put("$t7", "1110");
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register.put("$t8", "1111");
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}
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public static String callRegister(String name) {
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addRegister();
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return register.get(name);
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}
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}

‎Assembler/Assembler/src/V_type.java

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import java.util.HashMap;
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import java.util.Map;
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public class V_type {
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private static Map <String,String> order = new HashMap<>();
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private static void addOrder() { // Specify machine code commands (Opcode)
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order.put("bnq", "111");
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order.put("lw", "001");
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order.put("sw", "010");
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order.put("andi", "100");
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order.put("ori", "101");
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}
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public static String callOrder(String name) {
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addOrder();
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return order.get(name);
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}
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}

‎docs/images/CPU.jpg

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