MathF.ReciprocalSqrtEstimate(Single) Method

Reference

Definition

Namespace:: System

Assemblies:: netstandard.dll, System.Runtime.dll

Source:: MathF.cs

Source:: MathF.cs

Source:: MathF.cs

Important

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Returns an estimate of the reciprocal square root of a specified number.

public:
 static float ReciprocalSqrtEstimate(float x);

public static float ReciprocalSqrtEstimate(float x);

static member ReciprocalSqrtEstimate : single -> single

Public Shared Function ReciprocalSqrtEstimate (x As Single) As Single

Parameters

x: Single

The number whose reciprocal square root is to be estimated.

Returns

Single

An estimate of the reciprocal square root x.

Remarks

On x86/x64 hardware this may use the RSQRTSS instruction which has a maximum relative error of 1.5 * 2^-12.

On ARM64 hardware this may use the FRSQRTE instruction which performs a single Newton-Raphson iteration.

On hardware without specialized support, this may just return 1.0 / Sqrt(x).

Applies to

Продукт	Версии
.NET	6, 7, 8, 9, 10

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