public DataProcessing(string instruction)
{
string[] insPieces = instruction.Split(" ", 2);
string opcode = Literals.OpCodes[insPieces[0].ToUpper()];
string s = "1";
string I = "0";
OperationType type = Literals.GetOperation(insPieces[0].ToUpper());
string rd = "r15", rn = "r15", rs = "r15", imm = "00000000";
//Compare is weird because it doesn't have an rd, add it anyways because it isn't used.
if (opcode.Equals("1000"))
{
insPieces[1] = "r15," + insPieces[1];
}
string[] registers = insPieces[1].Split(',');
if (type.HasFlag(OperationType.Rd))
{
rd = registers[0];
}
if (type.HasFlag(OperationType.Rn))
{
if (Int32.TryParse(registers[1].ToString(), out int immInt))
{
rn = "r15";
imm = Literals.IntToBinaryString(immInt);
I = "1";
}
else
{
rn = registers[1];
}
}
if (type.HasFlag(OperationType.Rs) || type.HasFlag(OperationType.Imm))
{
if (!type.HasFlag(OperationType.Rs) && registers.Length == 2)
{
//Do nothing, we already did it in the last step
}
else if (Int32.TryParse(registers[2].ToString(), out int immInt))
{
rs = "r15";
imm = Literals.IntToBinaryString(immInt);
I = "1";
}
else
{
rs = registers[2];
}
}
_operation = Prefix + I + opcode + s + Literals.Registers[rn] + Literals.Registers[rd] + Literals.Registers[rs] + imm;
}
