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

Item	Description
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
x	scalar, vector, or matrix	float	any
exp	same as input x	float	same dimension(s) as input x
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 3 (DirectX HLSL) and higher shader models	yes
Shader Model 2 (DirectX HLSL)	yes (ps_2_x only)
Shader Model 1 (DirectX HLSL)	no

Remarks

Requirements

Requirement	Value
Header	Corecrt_math.h

See also

Intrinsic Functions (DirectX HLSL)