rsqrt

Returns the reciprocal of the square root of the specified value.

ret rsqrt(x)

 

Parameters

ItemDescription

x

[in] The specified value.

 

Return Value

The reciprocal of the square root of the x parameter.

Remarks

This function uses the following formula: 1 / sqrt(x).

Type Description

Name Template Type Component Type Size
xscalar, vector, or matrix float any
retsame as input x float same dimension(s) as input x

 

Minimum Shader Model

This function is supported in the following shader models.

Shader ModelSupported
Shader Model 2 (DirectX HLSL) and higher shader modelsyes
Shader Model 1 (DirectX HLSL) yes (vs_1_1 only)

 

See also

Intrinsic Functions (DirectX HLSL)

 

 

Show: