# FX_InvSqrt

## C Specification

      #include <nitro/fx/fx_cp.h>

      fx32 FX_InvSqrt(fx32 x);

## Arguments

x | `fx32` format fixed-point decimal

## Return Values

Reciprocal of the square root of `x`.

## Description

This function calculates the reciprocal of an `fx32`-format square root. It returns the result as an `fx32` type. The Divider and Square Root Calculator are used internally.

## See Also

`FX_Sqrt, FX_Inv`

## Revision History

01/19/2004 Initial version.