dx-graphics-hlsl-ldexp.md

title	description	ms.assetid	keywords	topic_type	api_name	api_location	api_type	ms.topic	ms.date
ldexp (Corecrt\_math.h)	Returns the result of multiplying the specified value by two, raised to the power of the specified exponent.	6d6fee96-f952-4058-a1ac-3abb98dbd540	ldexp HLSL	apiref	ldexp	corecrt_math.h	HeaderDef	reference	05/31/2018

ldexp

Returns the result of multiplying the specified value by two, raised to the power of the specified exponent.

ret ldexp(x, exp)

This function uses the following formula: x * 2^exp

Parameters

Item	Description
x	[in] The specified value.
exp	[in] The specified exponent.

Return Value

The result of multiplying the x parameter by two, raised to the power of the exp 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 2 (DirectX HLSL) and higher shader models	yes
Shader Model 1 (DirectX HLSL)	yes (vs_1_1 only)

Requirements

Requirement	Value
Header	Corecrt_math.h

See also

Intrinsic Functions (DirectX HLSL)