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.




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


[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



See also

Intrinsic Functions (DirectX HLSL)