[HDLBits] Popcount255

A "population count" circuit counts the number of '1's in an input vector. Build a population count circuit for a 255-bit input vector.

module top_module( 
    input [254:0] in,
    output [7:0] out );
    always@(*) begin
        out=8'b0;
        for(int i=0;i<255;i=i+1) begin
            if(in[i]==1'b1)
                out=out+1;
        end
    end
endmodule

for真好用