Mux2to1

• 来源：Mux2to1 - HDLBits

Problem Statement

Create a one-bit wide, 2-to-1 multiplexer. When sel=0, choose a. When sel=1, choose b.

Tip

The ternary operator (cond ? iftrue : iffalse) is easier to read.

Official Solution

module top_module (
    input a,
    input b,
    input sel,
    output out
);

    assign out = (sel & b) | (~sel & a);    // Mux expressed as AND and OR

    // Ternary operator is easier to read, especially if vectors are used:
    // assign out = sel ? b : a;

endmodule

My Solution

module top_module( 
    input a, b, sel,
    output out ); 

    assign out = sel ? b : a;

endmodule