rsqrt
Returns the reciprocal of the square root of the specified value.
ret rsqrt(x) |
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Parameters
Item | Description |
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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 |
---|---|---|---|
x | scalar, vector, or matrix | float | any |
ret | same as input x | float | same dimension(s) as input x |
Minimum Shader Model
This function is supported in the following shader models.
Shader Model | Supported |
---|---|
Shader Model 2 (DirectX HLSL) and higher shader models | yes |
Shader Model 1 (DirectX HLSL) | yes (vs_1_1 only) |