ID:15442 DSP block output WYSIWYG primitive "<name>" is using saturation, but saturation cannot be used with unsigned data

CAUSE: The specified DSP block output WYSIWYG primitive is using saturation, but the SIGNA and SIGNB ports are connected to ground. Saturation does not support unsigned data.

ACTION: Either set the specified ports of the specified DSP block slice to VCC or a dynamic signal, or change the specified WYSIWYG DSP block output primitive to not use saturation.