/// <summary>
/// Constructor for an operand which is a register
/// </summary>
/// <param name="reg">the register to be passed as an operand</param>
/// <param name="type"> the type of the operand i.e memory address or intermediate value</param>
public Operand(Register reg, EnumOperandType type)
{
isRegister = true;
register = reg;
value = reg.Value;
this.type = type;
}
/// <summary>
/// Constructor for an operand which is an intermediate value
/// </summary>
/// <param name="value"> the value of the operand </param>
/// <param name="type"> the type of the operand i.e memory address or intermediate value</param>
public Operand(int value, EnumOperandType type)
{
this.value = value;
this.type = type;
IsRegister = false;
register = null;
}
public Operand(string labelName, EnumOperandType type)
{
isRegister = false;
register = null;
value = 0;
this.type = type;
this.labelName = labelName;
}
/// <summary>
/// Primary constructor for a special register
/// </summary>
/// <param name="name"> The name of the register</param>
protected SpecialRegister(string name)
{
this.name = name;
value = 0;
type = EnumOperandType.VALUE;
if (name.Equals("SP"))
{
Value = 8096; // initialize the stack pointer to 8096
}
}
/// <summary>
/// Sets the string value in a special register
/// </summary>
/// <param name="value"> the value to store in the register</param>
/// <param name="type">the type of data memory or value</param>
public override void SetRegisterValue(string value, EnumOperandType type)
{
valueString = value;
this.type = type;
}
/// <summary>
/// Sets the value in a special register
/// </summary>
/// <param name="value"> the value to store in the register</param>
/// <param name="type">the type of data memory or value</param>
public override void SetRegisterValue(int value, EnumOperandType type)
{
this.value = value;
this.type = type;
}
/// <summary>
/// Protected constructor for a register
/// this is the primary constructor for a register.
/// </summary>
/// <param name="name"> the name of the register</param>
protected Register(string name)
{
this.name = name;
value = 0;
type = EnumOperandType.VALUE;
}
public virtual void SetRegisterValue(string value, EnumOperandType type)
{
throw new NotSupportedException();
}
/// <summary>
/// Sets the value in a register
/// </summary>
/// <param name="value"> the value to store in the register</param>
/// <param name="type">the type of data memory or value</param>
public virtual void SetRegisterValue(int value, EnumOperandType type)
{
this.value = value;
this.type = type;
}
