IMPLEMENTATION OF FOUR BITS PRIORITY ENCODER USING CONDITIONAL OPERATOR

priority encoder is a encoder is an encoder which checks its msb bit if it is one it ignores other bits

Source Code:
module periority_encoder(in,valid,out);
    input [3:0]in;
    output valid;
    output [1:0]out;
    assign out[0]=in[3]|((~in[2])&in[1]);
    assign out[1]=in[3]|in[2];
    assign valid=|in;
endmodule

Simulation code:

module test( );

    reg[3:0]in;

    wire valid;

    wire[1:0]out;

    integer i;

    periority_encoder endf(in,valid,out);

    initial

    begin

     for (i=0; i<16; i=i+1)

     #5 in=i;

    end

endmodule