"Error reported by S-function 'xlslice' in 'cic2/CORDIC ATAN/CORDIC Fine Angle PE/CORDIC PE1/Slice':
--- The Slice Block received a data word with the valid bit set to true, but the data in an indeterminate ("don't care") state. This condition indicates a usage error when the output type is boolean. Care must be taken when asserting that data samples flowing to the Slice Block are valid."