module encoder_using_ifffff(
binary_out ,
encoder_in , 
enable       
); 

input [3:0] binary_out  ;
//-----------Input Ports---------------
input  enable ; 
input [15:0] encoder_in ; 
//------------Internal Variables--------
reg [3:0] binary_out ;  
//-------------Code Start-----------------
always @ (enable or encoder_in)
 begin 
   binary_out = 0; 
   if (enable) begin
     if (encoder_in == 16'h0002) begin
      binary_out = 1;
     end  if (encoder_in == 16'h0004) begin 
      binary_out = 2; 
     end  if (encoder_in == 16'h0008) begin 
      binary_out = 3; 
     end  if (encoder_in == 16'h0010) begin 
      binary_out = 4; 
     end  if (encoder_in == 16'h0020) begin 
      binary_out = 5; 
     end  if (encoder_in == 16'h0040) begin 
      binary_out = 6; 
     end  if (encoder_in == 16'h0080) begin 
      binary_out = 7; 
     end  if (encoder_in == 16'h0100) begin 
      binary_out = 8; 
     end  if (encoder_in == 16'h0200) begin 
      binary_out = 9; 
     end if (encoder_in == 16'h0400) begin 
      binary_out = 10; 
     end  if (encoder_in == 16'h0800) begin 
      binary_out = 11; 
     end  if (encoder_in == 16'h1000) begin
      binary_out = 12; 
     end  if (encoder_in == 16'h2000) begin 
      binary_out = 13;
     end  if (encoder_in == 16'h4000) begin 
      binary_out = 14; 
     end if (encoder_in == 16'h8000) begin 
      binary_out = 15; 
     end
  end
end
      
endmodule