ID:68007 Clock port must be used if the PIPELINE parameter value is more than 0

CAUSE: The clock port is not instantiated when the PIPELINE parameter is set to a non-zero value. This error usually occurs when you instantiate a megafunction directly in a design file rather than using the MegaWizard Plug-In Manager .

ACTION: Instantiate a clock port for the pipelined altfp_inv_sqrt megafunction.