DSP Builder for Intel® FPGAs (Advanced Blockset): Handbook

ID 683337
Date 6/11/2024
Document Table of Contents

14.4.55. Sqrt

The Sqrt block applies a numerical root operation to its input and produces the result. The mask parameter pop-up menu selects the required root function that you apply.
Table 254.  Functions for the Sqrt Block
Function Description
cbrt(x) Cube root.
recipsqrt(x) Reciprocal square root.
sqrt(x) Square root.
Table 255.  Parameters for Sqrt Block
Parameter Values Description
Function cbrt(x), recipsqrt(x), or sqrt(x) Selects the numerical root function.
Floating-point rounding Correct or Faithful Only for sqrt(x) function.
Advanced Options Blank or struct('method',256)

The sqrt(x) function with integer input and output has two semantics: floor semantics, floor(sqrt(x)), for a logic reduction on wider data types or the default round-to-nearest semantics. To select floor semantics, type struct('method',256).

Table 256.  Port Interface for the Sqrt Block
Signal Direction Type Description Vector Data Support Complex Data Support
x Input For recipsqrt(x), or sqrt(x), any fixed- or floating-point 32-bit integer. For cbrt(x) floating-point input only. Operand Yes No
q Output Output type depends on input type. Result Yes No