Need the DECIMAL-TO-BINARY CONVERSION

#include

#include

#include

#include

#include

#include

using namespace std;

using namespace boost;

#define NumberOfInst 100

int length = 0;

vector ASM;

vector BIN;

int find_str(string a, string keyword, int nth)

{

iterator_range r = find_nth(a, keyword, nth);

return distance(a.begin(), r.begin());

}

string R_name(string r)

{

string R;

int r_int;

int r_ones;

int r_tens;

if (r[1] == ',')//Reg_name has one digit

{

r_int = (int)r[0] - 48; //char to int, by subtracting ASCII of '0'

}

else //Reg_name has two digit

{

r_ones = (int)r[1] - 48;

r_tens = (int)r[0] - 48;

r_int = 10*r_tens + r_ones;

}

bitset<5> b(r_int);

R = b.to_string();

return R;

}

void readASM()

{

ASM.resize(NumberOfInst);

string line;

ifstream myfile ("Assembly_Code.txt");

int i = 0;

if (myfile.is_open())

{

while ( getline (myfile,line) )

{

ASM[i] = line;

i++;

}

myfile.close();

}

else cout << "Unable to open file";

length = i;

}

int writeBIN(vector BIN)

{

ofstream myfile;

myfile.open("Bin_code.txt",std::ios_base::app);

int j=0;

if (myfile.is_open())

{

while(j

{

myfile << BIN[j] << endl;

j++;

}

}

else cout<<"Unable to open file";

myfile.close();

return 0;

}

string Addr_extend(string Addr)

{

return (bitset<26> (Addr)).to_string();

}

string Imm_extend(string Imm)

{

return (bitset<16> (Imm)).to_string();

}

int main ()

{

string InstName;

int Blank_pos;//index of ' '

int Rs_pos;//index of Rs

int Rt_pos;

int Rd_pos;

int Imm_pos;

string opcode;

string Rs;

string Rt;

string Rd;

string Shamt;

string Func;

string Imm;

string Addr;

string temp;

int i=0;

readASM();

for(i=0;i

{

Blank_pos = find_str(ASM[i], " ", 0);

InstName = ASM[i].substr(0,Blank_pos);

if (InstName == "ADD" | InstName == "SUB" | InstName == "AND" | InstName == "OR" | InstName == "NOR")

{//R-Type

Rs_pos = find_str(ASM[i], " R", 0)+2;

Rt_pos = find_str(ASM[i], " R", 1)+2;

Rd_pos = find_str(ASM[i], " R", 2)+2;

//Syntax Check, to be done, optional, using str.find_first_not_of

opcode = "000000";

Rs = R_name(ASM[i].substr(Rs_pos,Rs_pos+1));

Rt = R_name(ASM[i].substr(Rt_pos,Rt_pos+1));

Rd = R_name(ASM[i].substr(Rd_pos,Rd_pos+1));

Shamt = "00000";

if(InstName == "ADD")

Func = "000001";

else if(InstName == "SUB")

Func = "000011";

else if(InstName == "AND")

Func = "000101";

else if(InstName == "OR")

Func = "000111";

else if(InstName == "NOR")

Func = "001001";

BIN.resize(32);

BIN[i] = opcode.append(Rs).append(Rt).append(Rd).append(Shamt).append(Func);

}

else if(InstName == "JMP")

{

opcode = "001100";

Addr = ASM[i].substr(5, ASM[i].length() - 1);

BIN.resize(32);

BIN[i] = opcode + Addr_extend(Addr);

}

else if(InstName == "HAL") {

BIN.resize(32);

BIN[i] = "11111111111111111111111111111111";

}

else

{//I-Type

Rs_pos = find_str(ASM[i], " R", 0)+2;

Rt_pos = find_str(ASM[i], " R", 1)+2;

Rs = R_name(ASM[i].substr(Rs_pos,Rs_pos+1));

Rt = R_name(ASM[i].substr(Rt_pos,Rt_pos+1));

Imm_pos = find_str(ASM[i], ", ", 1)+2;

Imm = ASM[i].substr(Imm_pos, ASM[i].length() - 1);

if(InstName == "ADDI")

opcode = "000001";

else if(InstName == "SUBI")

opcode = "000010";

else if(InstName == "ANDI")

opcode = "000011";

else if(InstName == "ORI")

opcode = "000100";

else if(InstName == "SHL")

opcode = "000101";

else if(InstName == "LB")

opcode = "000111";

else if(InstName == "SB")

opcode = "001000";

else if(InstName == "BLT")

opcode = "001001";

else if(InstName == "BEQ")

opcode = "001010";

else if(InstName == "BNE")

opcode = "001011";

BIN.resize(32);

BIN[i] = opcode + Rs + Rt + Imm_extend(Imm);

}

}

writeBIN(BIN);

return 0;

}