public PopInstruction(int offset, Operand operand)
: base(offset, operand)
{
}
/// <summary>
/// Determines if a given operand is 8 bit compatible
/// If both operands of a binary operation are 8 bit, then it is a 8 bit operation, otherwise it is a 16 bit operation
/// </summary>
/// <remarks>
/// Operands of type sbyte are acounted for as 16 bit operands, as they will always be sign-extended to 16 bit
/// </remarks>
/// <param name="operand">The operand to test</param>
/// <returns>Returns true if the operand is 8 bit compatible, false otherwise</returns>
public static bool IsByteOperand(Operand operand)
{
return !operand.IsDirect || operand.ValueType == typeof(Register8) || operand.ValueType == typeof(byte);
}
public ArithmeticInstruction(int offset, ArithmeticOperation operation, Operand destination, Operand source)
: base(offset, destination, source)
{
this.operation = operation;
}
private static ushort GetOperandRawValue(SimulationContext context, Operand operand)
{
if (operand is Operand<Register8>)
return context.GetRegister8(((Operand<Register8>)operand).Value);
else if (operand is Operand<Register16>)
return context.GetRegister16(((Operand<Register16>)operand).Value);
else if (operand is Operand<byte>)
return ((Operand<byte>)operand).Value;
else if (operand is Operand<ushort>)
return ((Operand<ushort>)operand).Value;
else if (operand is Operand<sbyte>)
{
if (operand.IsDirect)
return (ushort)(context.SP + ((Operand<sbyte>)operand).Value);
else
return (ushort)(short)((Operand<sbyte>)operand).Value;
}
else
throw new InvalidOperationException();
}
public UnaryInstruction(int offset, Operand operand)
: base(offset)
{
this.operand = operand;
}
public LoadInstruction(int offset, LoadOperationType operation, Operand destination, Operand source)
: base(offset, destination, source)
{
this.operation = operation;
}
public LoadInstruction(int offset, Operand destination, Operand source)
: this(offset, LoadOperationType.Normal, destination, source)
{
}
public BinaryInstruction(int offset, Operand destination, Operand source)
: base(offset)
{
this.destination = destination;
this.source = source;
}
public BitInstruction(int offset, BitOperation operation, Operand destination, Operand source)
: base(offset, destination, source)
{
this.operation = operation;
}
