Mux2to1v

• 来源：Mux2to1v - HDLBits

Problem Statement

Create a 100-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 [99:0] a,
    input [99:0] b,
    input sel,
    output [99:0] out
);

    assign out = sel ? b : a;

    // The following doesn't work. Why?
    // assign out = (sel & b) | (~sel & a);

endmodule

My Solution

module top_module( 
    input [99:0] a, b,
    input sel,
    output [99:0] out );

    assign out = sel ? b : a;

endmodule