The approach is to combine all input fields into a single 8-bit output by arranging each signal in the required bit positions using Verilog concatenation, ensuring that the final packed vector matches the specified bit layout exactly.
Code
/*Write your code here*/
module concat8_packer(
input [3:0] A,
input [1:0] B,
input C,
input D,
output [7:0] OUT
);
assign OUT = {A, B, ~C, D};
endmodule