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Computes CORDIC-based hyperbolic tangent and generates optimized HDL code

**Library:**Fixed-Point Designer / Math Operations

The Hyperbolic Tangent HDL Optimized block returns the hyperbolic tangent
of *x*, computed using a CORDIC-based implementation optimized for HDL code
generation.

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[4] Schelin, Charles W. “Calculator Function
Approximation.” *The American Mathematical Monthly*.
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