module repeat_example();
reg  [3:0] opcode;
reg  [15:0] data;
reg        temp;

always @ (opcode or data)
begin
  if (opcode == 10) begin
    // Perform rotate
    repeat (8) begin 
      #1 temp = data[15];
      data = data << 1;
      data[0] = temp;   
    end 
  end
end
// Simple test code
initial begin
   $display (" TEMP  DATA");
   $monitor (" %b     %b ",temp, data);
   #1 data = 18'hF0;
   #1 opcode = 10;
   #10 opcode = 0;
   #1 $finish;
end

endmodule