frexp

Returns the mantissa and exponent of the specified floating-point value.

ret frexp(x, exp)

 

The return value is the mantissa, and the value returned by exp parameter is the exponent.

Parameters

ItemDescription

x

[in] The specified floating-point value. If the x parameter is 0, this function returns 0 for both the mantissa and the exponent.

exp

[out] The returned exponent of the x parameter.

 

Return Value

The mantissa of the x parameter.

Type Description

Name Template Type Component Type Size
xscalar, vector, or matrix float any
expsame as input x float same dimension(s) as input x
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 3 (DirectX HLSL) and higher shader modelsyes
Shader Model 2 (DirectX HLSL) yes (ps_2_x only)
Shader Model 1 (DirectX HLSL) no

 

Remarks

See also

Intrinsic Functions (DirectX HLSL)

 

 

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