Added ModelSim folder (and have to add files into it as to allow for different testbench code)

ModelSim/lu.sv

@@ -0,0 +1,16 @@
+module lu #(parameter width = 2) (
+    input logic [1:0] op,
+    input logic [2**width-1:0] A,
+	 input logic [2**width-1:0] B,
+    output logic [2**width-1:0] Y);
+	 
+    always_comb begin
+		case (op)
+			2'b00:	Y =   A & B;
+			2'b01:	Y =   A | B;
+			2'b10:	Y =   A ^ B;
+			2'b11:	Y = ~(A | B);
+			default: Y = '0;
+		endcase
+    end
+endmodule