/// <summary>
/// add operators to the instruction list in decimal
/// </summary>
private void AddOperator(IFormatInstructions _operator)
{
string binInstruction = GetBinaryFormat(_operator);
//this will execute if it was an undefined variable
if (binInstruction == null)
{
return;
}
if (binInstruction.Length != 16)
{
AsmLogger.Error($"Invalid bit size: {binInstruction.Length}",
currentLine.ToString(),
$"Malformatted Instruction {_operator}, Binary: {binInstruction}");
}
else if (!_operator.IsValid)
{
AsmLogger.Error($"Invalid instruction {_operator}",
currentLine.ToString(),
$"Invalid syntax or malformatted instruction"
);
}
string firstByte = binInstruction.Substring(0, 8);
AddInstruction(Convert.ToInt32(firstByte, 2));
currentAddress++;
string secondByte = binInstruction.Substring(8, 8);
AddInstruction(Convert.ToInt32(secondByte, 2));
currentAddress++;
}
/// <summary>
/// Add instruction to instruction list
/// </summary>
/// <param name="instruction"></param>
private void AddInstruction(IFormatInstructions instruction)
{
// verify size of token array and increment if necessary
if (sizeCounter >= instructionList.Length / 2)
{
Array.Resize(ref instructionList, instructionList.Length * 2);
}
instructionList[sizeCounter] = instruction;
sizeCounter++;
}
/// <summary>
/// get binary format of each instruction
/// </summary>
private string GetBinaryFormat(IFormatInstructions _operator)
{
int opcode = OperatorsInfo.GetOPCode(_operator.Operator);
switch (OperatorsInfo.GetInstructionFormat(_operator.Operator))
{
case EInstructionFormat.FORMAT_1:
{
int Rc = 0;
int Ra = 0;
int Rb = 0;
InstructionFormat1 format = (InstructionFormat1)_operator;
if (format.RegisterA != null)
{
Ra = (format.RegisterA?.ToString() == "") ? 0 : Convert.ToInt32(Regex.Replace(format.RegisterA.ToString(), @"[.\D+]", ""));
}
if (format.RegisterC != null)
{
Rb = (format.RegisterB?.ToString() == "") ? 0 : Convert.ToInt32(Regex.Replace(format.RegisterB.ToString(), @"[.\D+]", ""));
}
if (format.RegisterC != null)
{
Rc = (format.RegisterC.ToString() == "") ? 0 : Convert.ToInt32(Regex.Replace(format.RegisterC.ToString(), @"[.\D+]", ""));
}
return($"{Convert.ToString(opcode, 2).PadLeft(5, '0')}" +
$"{Convert.ToString(Ra, 2).PadLeft(3, '0')}" +
$"{Convert.ToString(Rb, 2).PadLeft(3, '0')}" +
$"{Convert.ToString(Rc, 2).PadLeft(3, '0')}00");
}
case EInstructionFormat.FORMAT_2:
{
InstructionFormat2 format = (InstructionFormat2)_operator;
int Ra = (format.RegisterA.ToString() == "") ? 0 : Convert.ToInt32(Regex.Replace(format.RegisterA.ToString(), @"[.\D+]", ""));
int constOrAddr;
if (constants.ContainsKey(format.ConstOrAddress.ToString()))
{
constOrAddr = constants[format.ConstOrAddress.ToString()];
}
else if (variables.ContainsKey(format.ConstOrAddress.ToString()))
{
constOrAddr = variables[format.ConstOrAddress.ToString()];
}
else if (labels.ContainsKey(format.ConstOrAddress.ToString()))
{
constOrAddr = labels[format.ConstOrAddress.ToString()];
}
else
{
//check if the constant or address is a direct input
try
{
constOrAddr = UnitConverter.BinaryToByte(
UnitConverter.HexToBinary(
format.ConstOrAddress.ToString().Replace("#", "")
)
);
} catch (OverflowException)
{
//send error message (undefined variable)
AsmLogger.Error($"Overflow in instruction: {_operator}",
currentLine.ToString(),
$"Value '{format.ConstOrAddress}'");
return(null);
}
catch
{
//send error message (undefined variable)
AsmLogger.Error($"Variable not defined: {_operator}",
currentLine.ToString(),
"Variable called but never defined");
return(null);
}
}
return($"{UnitConverter.IntToBinary(opcode, defaultWidth: 5)}" +
$"{UnitConverter.IntToBinary(Ra, defaultWidth: 3)}" +
$"{UnitConverter.IntToBinary(constOrAddr, defaultWidth: 8)}");
}
case EInstructionFormat.FORMAT_3:
{
InstructionFormat3 format = (InstructionFormat3)_operator;
int constOrAddr = 0;
if (constants.ContainsKey(format.ConstOrAddress.ToString()))
{
constOrAddr = constants[format.ConstOrAddress.ToString()];
}
else if (variables.ContainsKey(format.ConstOrAddress.ToString()))
{
constOrAddr = variables[format.ConstOrAddress.ToString()];
}
else if (labels.ContainsKey(format.ConstOrAddress.ToString()))
{
constOrAddr = labels[format.ConstOrAddress.ToString()];
}
else
{
//check if the constant or address is a direct input
try
{
constOrAddr = Convert.ToInt32(format.ConstOrAddress.ToString().Replace("#", ""), 16);
}
catch
{
//send error message (undefined variable)
return(null);
}
}
return($"{Convert.ToString(opcode, 2).PadLeft(5, '0')}" +
$"{Convert.ToString(constOrAddr, 2).PadLeft(11, '0')}");
}
default:
{
throw new Exception("Token is not an instruction");
}
}
}
