Verilog刷题笔记28

题目：
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.

解题：

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

结果正确：