frexp
frexp
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frexp Extract mantissa and exponent.

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floatn `frexp` floatn x __global intn *exp floatn `frexp` floatn x __local intn *exp floatn `frexp` floatn x __private intn *exp float `frexp` float x __global int *exp float `frexp` float x __local int *exp float `frexp` float x __private int *exp doublen `frexp` doublen x __global intn *exp doublen `frexp` doublen x __local intn *exp doublen `frexp` doublen x __private intn *exp double `frexp` double x __global int *exp double `frexp` double x __local int *exp double `frexp` double x __private int *exp halfn `frexp` halfn x __global intn *exp halfn `frexp` halfn x __local intn *exp halfn `frexp` halfn x __private intn *exp half `frexp` half x __global int *exp half `frexp` half x __local int *exp half `frexp` half x __private 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 * 2exp.

## 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

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