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

Header
Corecrt_math.h

See also

Intrinsic Functions (DirectX HLSL)