/*****************************************//**        8bit RISC MCU desing         **//**             w module                **//**            BY yuzhijie              **//**            2006.11.3              **//*****************************************/`timescale 1ns/100psmodule w(alu_out,w_ena,w_out,clk1,reset);    input clk1,reset,w_ena;    input[7:0]alu_out;    output [7:0]w_out;    reg [7:0]w_out;    always@(posedge clk1)    begin        if(reset)        begin            w_out<=8'bxxxx_xxxx;        end        if(w_ena)        begin            w_out<=alu_out;        end        else        begin            w_out<=8'bzzzz_zzzz;    endendmodule