/// <summary>Emit code</summary>
/// <returns>Success or fail</returns>
public override bool Emit(EmitContext ec)
{
Left.EmitToStack(ec);
//ec.MarkOptimizable(); // Marks last instruction as last push
Right.EmitToStack(ec);
//ec.MarkOptimizable(); // Marks last instruction as last push
ec.EmitComment(Left.CommentString() + " " + GetOperatorString() + " " + Right.CommentString());
if (Operator == Operators.Add)
{
ec.EmitPop(RegistersEnum.CX);
ec.EmitPop(RegistersEnum.AX);
ec.EmitInstruction(new Add()
{
DestinationReg = RegistersEnum.AX, SourceReg = RegistersEnum.CX, Size = 80, OptimizingBehaviour = OptimizationKind.PPO
});
ec.EmitPush(RegistersEnum.AX);
}
else if (Operator == Operators.Sub)
{
ec.EmitPop(RegistersEnum.CX);
ec.EmitPop(RegistersEnum.AX);
ec.EmitInstruction(new Sub()
{
DestinationReg = RegistersEnum.AX, SourceReg = RegistersEnum.CX, Size = 80, OptimizingBehaviour = OptimizationKind.PPO
});
ec.EmitPush(RegistersEnum.AX);
}
else if (Operator == Operators.Mul)
{
ec.EmitPop(RegistersEnum.CX);
ec.EmitPop(RegistersEnum.AX);
ec.EmitInstruction(new Multiply()
{
DestinationReg = RegistersEnum.CX, Size = 80, OptimizingBehaviour = OptimizationKind.PPO
});
ec.EmitPush(RegistersEnum.CX);
}
else if (Operator == Operators.Div)
{
ec.EmitPop(RegistersEnum.CX);
ec.EmitPop(RegistersEnum.AX);
ec.EmitInstruction(new Xor()
{
DestinationReg = EmitContext.D, SourceReg = EmitContext.D, Size = 80
});
ec.EmitInstruction(new Divide()
{
DestinationReg = RegistersEnum.CX, Size = 80
});
ec.EmitPush(RegistersEnum.CX);
}
else if (Operator == Operators.Mod)
{
ec.EmitPop(RegistersEnum.CX);
ec.EmitPop(RegistersEnum.AX);
ec.EmitInstruction(new Xor()
{
DestinationReg = EmitContext.D, SourceReg = EmitContext.D, Size = 80
});
ec.EmitInstruction(new Divide()
{
DestinationReg = RegistersEnum.CX, Size = 80
});
ec.EmitInstruction(new Mov()
{
DestinationReg = RegistersEnum.AX, SourceReg = RegistersEnum.DX, Size = 80
});
ec.EmitPush(RegistersEnum.AX);
}
else if (Operator == Operators.And)
{
ec.EmitPop(RegistersEnum.BX);
ec.EmitPop(RegistersEnum.AX);
ec.EmitInstruction(new And()
{
DestinationReg = RegistersEnum.AX, SourceReg = RegistersEnum.BX, Size = 80, OptimizingBehaviour = OptimizationKind.PPO
});
ec.EmitPush(RegistersEnum.AX);
}
else if (Operator == Operators.Or)
{
ec.EmitPop(RegistersEnum.BX);
ec.EmitPop(RegistersEnum.AX);
ec.EmitInstruction(new Or()
{
DestinationReg = RegistersEnum.AX, SourceReg = RegistersEnum.BX, Size = 80, OptimizingBehaviour = OptimizationKind.PPO
});
ec.EmitPush(RegistersEnum.AX);
}
// Comparison
else if (Operator == Operators.Equal)
{
ec.EmitPop(RegistersEnum.BX);
ec.EmitPop(RegistersEnum.AX);
ec.EmitInstruction(new Compare()
{
DestinationReg = RegistersEnum.AX, SourceReg = RegistersEnum.BX, Size = 80, OptimizingBehaviour = OptimizationKind.PPO
});
ec.EmitBoolean(RegistersEnum.AL, ConditionalTestEnum.Equal, ConditionalTestEnum.NotEqual);
ec.EmitPush(RegistersEnum.AX);
}
else if (Operator == Operators.NotEqual)
{
ec.EmitPop(RegistersEnum.BX);
ec.EmitPop(RegistersEnum.AX);
ec.EmitInstruction(new Compare()
{
DestinationReg = RegistersEnum.AX, SourceReg = RegistersEnum.BX, Size = 80, OptimizingBehaviour = OptimizationKind.PPO
});
ec.EmitBoolean(RegistersEnum.AL, ConditionalTestEnum.NotEqual, ConditionalTestEnum.Equal);
ec.EmitPush(RegistersEnum.AX);
}
else if (Operator == Operators.LT)
{
ec.EmitPop(RegistersEnum.BX);
ec.EmitPop(RegistersEnum.AX);
ec.EmitInstruction(new Compare()
{
DestinationReg = RegistersEnum.AX, SourceReg = RegistersEnum.BX, Size = 80, OptimizingBehaviour = OptimizationKind.PPO
});
ec.EmitBoolean(RegistersEnum.AL, ConditionalTestEnum.LessThan, ConditionalTestEnum.GreaterThanOrEqualTo);
ec.EmitPush(RegistersEnum.AX);
}
else if (Operator == Operators.GT)
{
ec.EmitPop(RegistersEnum.BX);
ec.EmitPop(RegistersEnum.AX);
ec.EmitInstruction(new Compare()
{
DestinationReg = RegistersEnum.AX, SourceReg = RegistersEnum.BX, Size = 80, OptimizingBehaviour = OptimizationKind.PPO
});
ec.EmitBoolean(RegistersEnum.AL, ConditionalTestEnum.GreaterThan, ConditionalTestEnum.LessThanOrEqualTo);
ec.EmitPush(RegistersEnum.AX);
}
else if (Operator == Operators.GTE)
{
ec.EmitPop(RegistersEnum.BX);
ec.EmitPop(RegistersEnum.AX);
ec.EmitInstruction(new Compare()
{
DestinationReg = RegistersEnum.AX, SourceReg = RegistersEnum.BX, Size = 80, OptimizingBehaviour = OptimizationKind.PPO
});
ec.EmitBoolean(RegistersEnum.AL, ConditionalTestEnum.GreaterThanOrEqualTo, ConditionalTestEnum.LessThan);
ec.EmitPush(RegistersEnum.AX);
}
else if (Operator == Operators.LTE)
{
ec.EmitPop(RegistersEnum.BX);
ec.EmitPop(RegistersEnum.AX);
ec.EmitInstruction(new Compare()
{
DestinationReg = RegistersEnum.AX, SourceReg = RegistersEnum.BX, Size = 80, OptimizingBehaviour = OptimizationKind.PPO
});
ec.EmitBoolean(RegistersEnum.AL, ConditionalTestEnum.LessThanOrEqualTo, ConditionalTestEnum.GreaterThan);
ec.EmitPush(RegistersEnum.AX);
}
return(base.Emit(ec));
}
