frexp

Extract mantissa and exponent.

`floatn frexp (`	float`n` `x`,
	int`n` `*exp)`

`float frexp (`	float `x`,
	int `*exp)`

`doublen frexp (`	double`n` `x`,
	int`n` `*exp)`

`double frexp (`	double `x`,
	int `*exp)`

`halfn frexp (`	half`n` `x`,
	__global int`n` `*exp)`

`halfn frexp (`	half`n` `x`,
	__local int`n` `*exp)`

`halfn frexp (`	half`n` `x`,
	__private int`n` `*exp)`

`halfn frexp (`	half`n` `x`,
	int`n` `*exp)`

`half frexp (`	half `x`,
	__global int `*exp)`

`half frexp (`	half `x`,
	__local int `*exp)`

`half frexp (`	half `x`,
	__private int `*exp)`

`half frexp (`	half `x`,
	int `*exp)`

Description

Extract mantissa and exponent from x. For each component the mantissa returned is a float with magnitude in the interval [1/2, 1) or 0. Each component of x equals mantissa returned * 2^exp.

Notes

The built-in math functions are not affected by the prevailing rounding mode in the calling environment, and always return the same value as they would if called with the round to nearest even rounding mode.

An application that wants to use half and halfn types will need to include the #pragma OPENCL EXTENSION cl_khr_fp16 : enable directive.

Specification

OpenCL Specification

Also see

Math Functions

Copyright © 2007-2013 The Khronos Group Inc. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and/or associated documentation files (the "Materials"), to deal in the Materials without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Materials, and to permit persons to whom the Materials are furnished to do so, subject to the condition that this copyright notice and permission notice shall be included in all copies or substantial portions of the Materials.