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Assembler.h
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#include <string>
#include <vector>
using namespace std;
struct Assembler
{
vector<uint8_t> Assemble(string path) {
uint16_t MemoryStart = 0xe000;
//stores the adress of jump points
vector<string> jmpKeyWords;
vector<uint16_t> jmpAddress;
uint16_t EndAddress;
//requests
vector<string> jmpKeyWordsReq;
vector<int> jmpAddressReq;
vector<uint8_t> machineCode;
std::ifstream file(path);
std::string line;
int currentLine = 1;
while (std::getline(file, line))
{
vector<string> tokenizedString;
//lexer
string token = "";
for (char x : line)
{
if (x != ' ') {
token = token + x;
}
else {
if (token.size() <= 0)
continue;
tokenizedString.push_back(token);
token = "";
}
if (x == line[line.length() - 1] && token != "" && token.size() > 0) {
tokenizedString.push_back(token);
token = "";
}
}
//stores the memory address of a jump point;
if (tokenizedString[0][tokenizedString[0].length() - 1] == ':') {
string keyWord = tokenizedString[0].substr(0, tokenizedString[0].length() - 1);
jmpKeyWords.push_back(keyWord);
jmpAddress.push_back(MemoryStart + machineCode.size() - 1);
}
if (tokenizedString[0][0] == '/') {
continue;
}
if (tokenizedString[0] == "ADD") {
uint8_t accumReg = GetReg(tokenizedString[1]);
if (accumReg == 10) {
cout << "ERROR Register not found," << " line:" << currentLine << endl;
break;
}
int8_t parm2 = GetReg(tokenizedString[2]);
//if parm2 is a value
if (parm2 == 10) {
if (tokenizedString[2][0] == '$') {
tokenizedString[2].erase(0, 1);
const char* chartoString = tokenizedString[2].c_str();
parm2 = (int8_t)strtol(chartoString, NULL, 16);
}
else if (tokenizedString[2][0] == '%') {
tokenizedString[2].erase(0, 1);
const char* chartoString = tokenizedString[2].c_str();
parm2 = (int8_t)strtol(chartoString, NULL, 2);
}
else {
cout << "ERROR second paramter incorrect," << " line:" << currentLine << endl;
break;
}
uint8_t byte = 0b00010000 + accumReg;
machineCode.push_back(byte);
byte = parm2;
machineCode.push_back(byte);
}
//if parm2 is a reg
else {
uint8_t byte = 0b00011000 + accumReg;
machineCode.push_back(byte);
byte = parm2;
machineCode.push_back(byte);
}
}
if (tokenizedString[0] == "ADC") {
uint8_t accumReg = GetReg(tokenizedString[1]);
if (accumReg == 10) {
cout << "ERROR Register not found," << " line:" << currentLine << endl;
break;
}
int8_t parm2 = GetReg(tokenizedString[2]);
//if parm2 is a value
if (parm2 == 10) {
if (tokenizedString[2][0] == '$') {
tokenizedString[2].erase(0, 1);
const char* chartoString = tokenizedString[2].c_str();
parm2 = (int8_t)strtol(chartoString, NULL, 16);
}
else if (tokenizedString[2][0] == '%') {
tokenizedString[2].erase(0, 1);
const char* chartoString = tokenizedString[2].c_str();
parm2 = (int8_t)strtol(chartoString, NULL, 2);
}
else {
cout << "ERROR second paramter incorrect," << " line:" << currentLine << endl;
break;
}
uint8_t byte = 0b00100000 + accumReg;
machineCode.push_back(byte);
byte = parm2;
machineCode.push_back(byte);
}
//if parm2 is a reg
else {
uint8_t byte = 0b00101000 + accumReg;
machineCode.push_back(byte);
byte = parm2;
machineCode.push_back(byte);
}
}
if (tokenizedString[0] == "AND") {
uint8_t accumReg = GetReg(tokenizedString[1]);
if (accumReg == 10) {
cout << "ERROR Register not found," << " line:" << currentLine << endl;
break;
}
int8_t parm2 = GetReg(tokenizedString[2]);
//if parm2 is a value
if (parm2 == 10) {
if (tokenizedString[2][0] == '$') {
tokenizedString[2].erase(0, 1);
const char* chartoString = tokenizedString[2].c_str();
parm2 = (int8_t)strtol(chartoString, NULL, 16);
}
else if (tokenizedString[2][0] == '%') {
tokenizedString[2].erase(0, 1);
const char* chartoString = tokenizedString[2].c_str();
parm2 = (int8_t)strtol(chartoString, NULL, 2);
}
else {
cout << "ERROR second paramter incorrect," << " line:" << currentLine << endl;
break;
}
uint8_t byte = 0b00110000 + accumReg;
machineCode.push_back(byte);
byte = parm2;
machineCode.push_back(byte);
}
//if parm2 is a reg
else {
uint8_t byte = 0b00111000 + accumReg;
machineCode.push_back(byte);
byte = parm2;
machineCode.push_back(byte);
}
}
if (tokenizedString[0] == "OR") {
uint8_t accumReg = GetReg(tokenizedString[1]);
if (accumReg == 10) {
cout << "ERROR Register not found," << " line:" << currentLine << endl;
break;
}
int8_t parm2 = GetReg(tokenizedString[2]);
//if parm2 is a value
if (parm2 == 10) {
if (tokenizedString[2][0] == '$') {
tokenizedString[2].erase(0, 1);
const char* chartoString = tokenizedString[2].c_str();
parm2 = (int8_t)strtol(chartoString, NULL, 16);
}
else if (tokenizedString[2][0] == '%') {
tokenizedString[2].erase(0, 1);
const char* chartoString = tokenizedString[2].c_str();
parm2 = (int8_t)strtol(chartoString, NULL, 2);
}
else {
cout << "ERROR second paramter incorrect," << " line:" << currentLine << endl;
break;
}
uint8_t byte = 0b01000000 + accumReg;
machineCode.push_back(byte);
byte = parm2;
machineCode.push_back(byte);
}
//if parm2 is a reg
else {
uint8_t byte = 0b01001000 + accumReg;
machineCode.push_back(byte);
byte = parm2;
machineCode.push_back(byte);
}
}
if (tokenizedString[0] == "NOT") {
uint8_t accumReg = GetReg(tokenizedString[1]);
if (accumReg == 10) {
cout << "ERROR Register not found," << " line:" << currentLine << endl;
break;
}
uint8_t byte = 0b01010000 + accumReg;
machineCode.push_back(byte);
}
if (tokenizedString[0] == "CMP") {
uint8_t accumReg = GetReg(tokenizedString[1]);
if (accumReg == 10) {
cout << "ERROR Register not found," << " line:" << currentLine << endl;
break;
}
int8_t parm2 = GetReg(tokenizedString[2]);
//if parm2 is a value
if (parm2 == 10) {
if (tokenizedString[2][0] == '$') {
tokenizedString[2].erase(0, 1);
const char* chartoString = tokenizedString[2].c_str();
parm2 = (int8_t)strtol(chartoString, NULL, 16);
}
else if (tokenizedString[2][0] == '%') {
tokenizedString[2].erase(0, 1);
const char* chartoString = tokenizedString[2].c_str();
parm2 = (int8_t)strtol(chartoString, NULL, 2);
}
else {
cout << "ERROR second paramter incorrect," << " line:" << currentLine << endl;
break;
}
uint8_t byte = 0b01100000 + accumReg;
machineCode.push_back(byte);
byte = parm2;
machineCode.push_back(byte);
}
//if parm2 is a reg
else {
uint8_t byte = 0b01101000 + accumReg;
machineCode.push_back(byte);
byte = parm2;
machineCode.push_back(byte);
}
}
if (tokenizedString[0] == "LR") {
uint8_t accumReg = GetReg(tokenizedString[1]);
if (accumReg == 10) {
cout << "ERROR Register not found," << " line:" << currentLine << endl;
break;
}
int8_t value = 0;
uint16_t addr = 0;
//if parm2 is a value
if(tokenizedString[2][0] == '#') {
if (tokenizedString[2][1] == '$') {
tokenizedString[2].erase(0, 2);
const char* chartoString = tokenizedString[2].c_str();
addr = (uint16_t)strtol(chartoString, NULL, 16);
}
else if (tokenizedString[2][1] == '%') {
tokenizedString[2].erase(0, 2);
const char* chartoString = tokenizedString[2].c_str();
addr = (uint16_t)strtol(chartoString, NULL, 2);
}
else {
cout << "ERROR second paramter incorrect," << " line:" << currentLine << endl;
break;
}
uint8_t byte = 0b01111000 + accumReg;
machineCode.push_back(byte);
byte = addr >> 8;
machineCode.push_back(byte);
byte = addr;
machineCode.push_back(byte);
}
//if parm2 is a reg
else {
if (tokenizedString[2][0] == '$') {
tokenizedString[2].erase(0, 1);
const char* chartoString = tokenizedString[2].c_str();
value = (int8_t)strtol(chartoString, NULL, 16);
}
else if (tokenizedString[2][0] == '%') {
tokenizedString[2].erase(0, 1);
const char* chartoString = tokenizedString[2].c_str();
value = (int8_t)strtol(chartoString, NULL, 2);
}
else {
cout << "ERROR second paramter incorrect," << " line:" << currentLine << endl;
break;
}
uint8_t byte = 0b01110000 + accumReg;
machineCode.push_back(byte);
byte = value;
machineCode.push_back(byte);
}
}
if (tokenizedString[0] == "WR") {
int8_t value = GetReg(tokenizedString[1]);
int byteAddrFlag = 0;
//check if you are adding a register to the second byte of an address
if (tokenizedString.size() == 4)
byteAddrFlag = 1;
if (value == 10) {
if (tokenizedString[1][0] == '$') {
tokenizedString[1].erase(0, 1);
const char* chartoString = tokenizedString[1].c_str();
value = (int8_t)strtol(chartoString, NULL, 16);
}
else if (tokenizedString[1][0] == '%') {
tokenizedString[1].erase(0, 1);
const char* chartoString = tokenizedString[1].c_str();
value = (int8_t)strtol(chartoString, NULL, 2);
}
uint8_t byte = 0b10000000;
if(byteAddrFlag == 1)
byte = 0b10000001;
machineCode.push_back(byte);
byte = value;
machineCode.push_back(byte);
}
else {
uint8_t byte = 0b10001000;
if (byteAddrFlag == 1)
byte = 0b10001001;
machineCode.push_back(byte);
byte = value;//register
machineCode.push_back(byte);
}
uint16_t addr;
if (tokenizedString[2][0] == '#') {
if (tokenizedString[2][1] == '$') {
tokenizedString[2].erase(0, 2);
const char* chartoString = tokenizedString[2].c_str();
addr = (uint16_t)strtol(chartoString, NULL, 16);
}
else if (tokenizedString[2][1] == '%') {
tokenizedString[2].erase(0, 2);
const char* chartoString = tokenizedString[2].c_str();
addr = (uint16_t)strtol(chartoString, NULL, 2);
}
else {
cout << "ERROR second paramter incorrect," << " line:" << currentLine << endl;
break;
}
uint8_t byte;
if (byteAddrFlag == 1) {
byte = addr;
machineCode.push_back(byte);
byte = GetReg(tokenizedString[3]);;//register
if (byte == 10) {
cout << "ERROR Register not found," << " line:" << currentLine << endl;
break;
}
machineCode.push_back(byte);
}
else {
byte = addr >> 8;
machineCode.push_back(byte);
byte = addr;
machineCode.push_back(byte);
}
}
else {
cout << "ERROR address is incorrect," << " line:" << currentLine << endl;
break;
}
}
if (tokenizedString[0] == "JMP") {
uint16_t addr = 0;
for (int i = 0; i < jmpKeyWords.size(); i++) {
if (jmpKeyWords[i] == tokenizedString[1]) {
addr = jmpAddress[i];
break;
}
}
if (addr == 0) {
jmpKeyWordsReq.push_back(tokenizedString[1]);
jmpAddressReq.push_back(machineCode.size() + 1);
}
uint8_t byte = 0b10010000;
machineCode.push_back(byte);
byte = addr >> 8;
machineCode.push_back(byte);
byte = addr;
machineCode.push_back(byte);
}
if (tokenizedString[0] == "JMF") {
uint16_t addr = 0;
uint16_t flag = GetFlag(tokenizedString[1]);
if (flag == 10) {
cout << "ERROR flag not found," << " line:" << currentLine << endl;
break;
}
for (int i = 0; i < jmpKeyWords.size(); i++) {
if (jmpKeyWords[i] == tokenizedString[2]) {
addr = jmpAddress[i];
break;
}
}
if (addr == 0) {
jmpKeyWordsReq.push_back(tokenizedString[2]);
jmpAddressReq.push_back(machineCode.size() + 1);
}
uint8_t byte = 0b10100000 + flag;
machineCode.push_back(byte);
byte = addr >> 8;
machineCode.push_back(byte);
byte = addr;
machineCode.push_back(byte);
}
if (tokenizedString[0] == "SUB") {
uint8_t accumReg = GetReg(tokenizedString[1]);
if (accumReg == 10) {
cout << "ERROR Register not found," << " line:" << currentLine << endl;
break;
}
int8_t parm2 = GetReg(tokenizedString[2]);
//if parm2 is a value
if (parm2 == 10) {
if (tokenizedString[2][0] == '$') {
tokenizedString[2].erase(0, 1);
const char* chartoString = tokenizedString[2].c_str();
parm2 = (int8_t)strtol(chartoString, NULL, 16);
}
else if (tokenizedString[2][0] == '%') {
tokenizedString[2].erase(0, 1);
const char* chartoString = tokenizedString[2].c_str();
parm2 = (int8_t)strtol(chartoString, NULL, 2);
}
else {
cout << "ERROR second paramter incorrect," << " line:" << currentLine << endl;
break;
}
uint8_t byte = 0b10110000 + accumReg;
machineCode.push_back(byte);
byte = parm2;
machineCode.push_back(byte);
}
//if parm2 is a reg
else {
uint8_t byte = 0b10111000 + accumReg;
machineCode.push_back(byte);
byte = parm2;
machineCode.push_back(byte);
}
}
if (tokenizedString[0] == "PUSH") {
int8_t parm = GetReg(tokenizedString[1]);
if (parm == 10) {
if (tokenizedString[2][0] == '$') {
tokenizedString[2].erase(0, 1);
const char* chartoString = tokenizedString[2].c_str();
parm = (int8_t)strtol(chartoString, NULL, 16);
}
else if (tokenizedString[2][0] == '%') {
tokenizedString[2].erase(0, 1);
const char* chartoString = tokenizedString[2].c_str();
parm = (int8_t)strtol(chartoString, NULL, 2);
}
else {
cout << "ERROR PUSH paramter incorrect," << " line:" << currentLine << endl;
break;
}
uint8_t byte = 0b11000000;
machineCode.push_back(byte);
byte = parm;
machineCode.push_back(byte);
}
else {
uint8_t byte = 0b11001000 + parm;
machineCode.push_back(byte);
}
}
if (tokenizedString[0] == "POP") {
uint8_t reg = GetReg(tokenizedString[1]);
if (reg == 10) {
cout << "ERROR reg not found," << " line:" << currentLine << endl;
break;
}
uint8_t byte = 0b11010000 + reg;
machineCode.push_back(byte);
}
if (tokenizedString[0] == "IP") {
uint8_t reg = GetReg(tokenizedString[1]);
if (reg == 10) {
cout << "ERROR reg not found," << " line:" << currentLine << endl;
break;
}
uint8_t byte = 0b11100000 + reg;
machineCode.push_back(byte);
}
if (tokenizedString[0] == "OP") {
uint8_t reg = GetReg(tokenizedString[1]);
if (reg == 10) {
uint8_t byte = 0b11110000;
machineCode.push_back(byte);
byte = line.size();
machineCode.push_back(byte);
int i = 0;
for (char x : line)
{
i++;
if (i > 3) {
machineCode.push_back(x);
}
}
}
else {
uint8_t byte = 0b11111000 + reg;
machineCode.push_back(byte);
}
}
currentLine++;
}
uint16_t addr = 0;
for (int jr = 0; jr < jmpKeyWordsReq.size();jr++) {
for (int i = 0; i < jmpKeyWords.size(); i++) {
if (jmpKeyWords[i] == jmpKeyWordsReq[jr]) {
addr = jmpAddress[i];
uint8_t byte = addr >> 8;
machineCode[jmpAddressReq[jr]] = byte;
byte = addr;
machineCode[jmpAddressReq[jr] + 1] = byte;
}
}
if (addr == 0) {
}
}
//This will print out the complied machine code for debugging purposes
/*
for (int i = 0; i < machineCode.size(); i++) {
cout <<"0x" << hex << (int)machineCode[i] << endl;
}
*/
return machineCode;
}
uint8_t GetReg(string reg)
{
if (reg == "A") return 0;
else if (reg == "B") return 1;
else if (reg == "C") return 2;
else if (reg == "D") return 3;
else if (reg == "E") return 4;
else if (reg == "G") return 5;
else if (reg == "H") return 6;
else {
return 10;
}
}
uint8_t GetFlag(string reg)
{
if (reg == "LESS") return 0;
else if (reg == "EQUALS") return 1;
else if (reg == "CARRY") return 2;
else if (reg == "OVERFLOW") return 3;
else if (reg == "ZERO") return 4;
else {
return 10;
}
}
};