module REGISTER_W_REGDST(in, w, out, rst, clk);    input [1:0] in;    wire [1:0] in;    input [0:0] w;    wire [0:0] w;    output [1:0] out;    reg [1:0] out;    input rst;    wire rst;    input clk;    wire clk;        always @(posedge clk or posedge rst)        begin : reg_thread            if (rst == 1)                out <= 2'b00;            else            begin                if (w[1'b0] == 1)                    out <= in;            end        endendmodule