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Normalized Reciprocal HDL Optimized

Computes normalized reciprocal and generates optimized HDL code

  • Library:
  • Fixed-Point Designer / Math Operations

  • Normalized Reciprocal HDL Optimized block

Description

The Normalized Reciprocal HDL Optimized block computes the normalized reciprocal of u, returned as y and t such that 0.5 < |y| ≤ 1 and 2ey = 1/u.

  • If u = 0 and u is a fixed-point or scaled-double data type, then y = 2 – eps(y) and e = 2nextpow2(w)w + f, where w is the word length of u and f is the fraction length of u.

  • If u = 0 and u is a floating-point data type, then y = Inf and t = 1.

Ports

Input

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Value to take the normalized reciprocal of, specified as a real scalar.

Data Types: single | double | fixed point

Whether input is valid, specified as a Boolean scalar. This control signal indicates when the data from the u input port is valid. When this value is 1 (true), the block captures the value at the u input port. When this value is 0 (false), the block ignores the input samples.

Data Types: Boolean

Output

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Normalized reciprocal that satisfies 0.5 < |y| ≤ 1 and 2ey = 1/u, returned as a scalar.

  • If the input at port u is a signed fixed-point or scaled-double data type with word length w, then y is a signed fixed-point or scaled-double data type with word length w and fraction length w – 2.

  • If the input at port u is an unsigned fixed-point or scaled-double data type with word length w, then y is an unsigned fixed-point or scaled-double data type with word length w and fraction length w – 1.

  • If the input at port u is a double, then y is a double.

  • If the input at port u is a single, the y is a single.

Data Types: single | double | fixed point

Exponent that satisfies 0.5 < |y| ≤ 1 and 2ey = 1/u, returned as an integer scalar.

Data Types: int32

Whether the output data is valid, returned as a Boolean scalar. When the value of this control signal is 1 (true), the block has successfully computed the outputs at ports y and e. When this value is 0 (false), the output data is not valid.

Data Types: Boolean

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Introduced in R2020a