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<title>frexp</title>
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<meta name="keywords" content="frexp" />
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<body>
<div class="refentry">
<a id="id-1"></a>
<div class="titlepage"></div>
<div xmlns="" class="refnamediv">
<a xmlns="http://www.w3.org/1999/xhtml" id="frexp"></a>
<h1>frexp</h1>
<p>
Extract mantissa and exponent.
</p>
</div>
<div class="refsynopsisdiv">
<h2></h2>
<div class="funcsynopsis">
<table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
<tr valign="bottom">
<td>
<code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
<a class="link" href="vectorDataTypes.html" target="pagedisplay">float<em class="replaceable"><code>n</code></em></a>
<strong class="fsfunc">
frexp
</strong>
(</code>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">float<em class="replaceable"><code>n</code></em></a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">x</var>, </td>
</td>
</tr>
<tr valign="top">
<td> </td>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">int<em class="replaceable"><code>n</code></em></a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*exp</var><code>)</code></td>
</tr>
</table>
</div>
<div class="funcsynopsis">
<table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
<tr valign="bottom">
<td>
<code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
<a class="link" href="vectorDataTypes.html" target="pagedisplay">float</a>
<strong class="fsfunc">
frexp
</strong>
(</code>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">float</a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">x</var>, </td>
</td>
</tr>
<tr valign="top">
<td> </td>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">int</a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*exp</var><code>)</code></td>
</tr>
</table>
</div>
<div class="funcsynopsis">
<table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
<tr valign="bottom">
<td>
<code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
<a class="link" href="vectorDataTypes.html" target="pagedisplay">double<em class="replaceable"><code>n</code></em></a>
<strong class="fsfunc">
frexp
</strong>
(</code>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">double<em class="replaceable"><code>n</code></em></a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">x</var>, </td>
</td>
</tr>
<tr valign="top">
<td> </td>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">int<em class="replaceable"><code>n</code></em></a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*exp</var><code>)</code></td>
</tr>
</table>
</div>
<div class="funcsynopsis">
<table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
<tr valign="bottom">
<td>
<code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
<a class="link" href="vectorDataTypes.html" target="pagedisplay">double</a>
<strong class="fsfunc">
frexp
</strong>
(</code>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">double</a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">x</var>, </td>
</td>
</tr>
<tr valign="top">
<td> </td>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">int</a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*exp</var><code>)</code></td>
</tr>
</table>
</div>
<div class="funcsynopsis">
<table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
<tr valign="bottom">
<td>
<code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
<a class="link" href="vectorDataTypes.html" target="pagedisplay">half<em class="replaceable"><code>n</code></em></a>
<strong class="fsfunc">
frexp
</strong>
(</code>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">half<em class="replaceable"><code>n</code></em></a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">x</var>, </td>
</td>
</tr>
<tr valign="top">
<td> </td>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="global.html" target="pagedisplay">__global</a>
<a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">int<em class="replaceable"><code>n</code></em></a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*exp</var><code>)</code></td>
</tr>
</table>
</div>
<div class="funcsynopsis">
<table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
<tr valign="bottom">
<td>
<code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
<a class="link" href="vectorDataTypes.html" target="pagedisplay">half<em class="replaceable"><code>n</code></em></a>
<strong class="fsfunc">
frexp
</strong>
(</code>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">half<em class="replaceable"><code>n</code></em></a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">x</var>, </td>
</td>
</tr>
<tr valign="top">
<td> </td>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="local.html" target="pagedisplay">__local</a>
<a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">int<em class="replaceable"><code>n</code></em></a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*exp</var><code>)</code></td>
</tr>
</table>
</div>
<div class="funcsynopsis">
<table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
<tr valign="bottom">
<td>
<code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
<a class="link" href="vectorDataTypes.html" target="pagedisplay">half<em class="replaceable"><code>n</code></em></a>
<strong class="fsfunc">
frexp
</strong>
(</code>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">half<em class="replaceable"><code>n</code></em></a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">x</var>, </td>
</td>
</tr>
<tr valign="top">
<td> </td>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="private.html" target="pagedisplay">__private</a>
<a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">int<em class="replaceable"><code>n</code></em></a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*exp</var><code>)</code></td>
</tr>
</table>
</div>
<div class="funcsynopsis">
<table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
<tr valign="bottom">
<td>
<code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
<a class="link" href="vectorDataTypes.html" target="pagedisplay">half<em class="replaceable"><code>n</code></em></a>
<strong class="fsfunc">
frexp
</strong>
(</code>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">half<em class="replaceable"><code>n</code></em></a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">x</var>, </td>
</td>
</tr>
<tr valign="top">
<td> </td>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">int<em class="replaceable"><code>n</code></em></a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*exp</var><code>)</code></td>
</tr>
</table>
</div>
<div class="funcsynopsis">
<table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
<tr valign="bottom">
<td>
<code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
<a class="link" href="vectorDataTypes.html" target="pagedisplay">half</a>
<strong class="fsfunc">
frexp
</strong>
(</code>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">half</a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">x</var>, </td>
</td>
</tr>
<tr valign="top">
<td> </td>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="global.html" target="pagedisplay">__global</a>
<a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">int</a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*exp</var><code>)</code></td>
</tr>
</table>
</div>
<div class="funcsynopsis">
<table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
<tr valign="bottom">
<td>
<code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
<a class="link" href="vectorDataTypes.html" target="pagedisplay">half</a>
<strong class="fsfunc">
frexp
</strong>
(</code>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">half</a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">x</var>, </td>
</td>
</tr>
<tr valign="top">
<td> </td>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="local.html" target="pagedisplay">__local</a>
<a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">int</a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*exp</var><code>)</code></td>
</tr>
</table>
</div>
<div class="funcsynopsis">
<table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
<tr valign="bottom">
<td>
<code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
<a class="link" href="vectorDataTypes.html" target="pagedisplay">half</a>
<strong class="fsfunc">
frexp
</strong>
(</code>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">half</a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">x</var>, </td>
</td>
</tr>
<tr valign="top">
<td> </td>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="private.html" target="pagedisplay">__private</a>
<a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">int</a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*exp</var><code>)</code></td>
</tr>
</table>
</div>
<div class="funcsynopsis">
<table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
<tr valign="bottom">
<td>
<code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
<a class="link" href="vectorDataTypes.html" target="pagedisplay">half</a>
<strong class="fsfunc">
frexp
</strong>
(</code>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">half</a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">x</var>, </td>
</td>
</tr>
<tr valign="top">
<td> </td>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="vectorDataTypes.html" target="pagedisplay">int</a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*exp</var><code>)</code></td>
</tr>
</table>
</div>
</div>
<div class="refsect1">
<a id="description"></a>
<h2>Description</h2>
<p>
Extract mantissa and exponent from <code class="varname">x</code>. For each component the mantissa
returned is a float with magnitude in the interval [1/2, 1) or 0. Each component of
<code class="varname">x</code> equals mantissa returned * 2<sup>exp</sup>.
</p>
</div>
<div class="refsect1">
<a id="notes"></a>
<h2>Notes</h2>
<p>
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.
</p>
<p>
An application that wants to use <span class="type">half</span>
and <span class="type">half<em class="replaceable"><code>n</code></em></span>
types will need to include the <code class="code">#pragma OPENCL EXTENSION
<a class="citerefentry" href="cl_khr_fp16.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_fp16</span></span></a> : enable</code>
directive.
</p>
</div>
<div class="refsect1">
<a id="specification"></a>
<h2>Specification</h2>
<p>
<img src="pdficon_small1.gif" />
<a href="https://www.khronos.org/registry/cl/specs/opencl-2.1-openclc.pdf#page=72" target="OpenCL Spec">OpenCL Specification</a>
</p>
</div>
<div class="refsect1">
<a id="seealso"></a>
<h2>Also see</h2>
<p>
<a class="citerefentry" href="mathFunctions.html"><span class="citerefentry"><span class="refentrytitle">Math Functions</span></span></a>
</p>
</div>
<div xmlns="" class="refsect3" lang="en" xml:lang="en"><a xmlns="http://www.w3.org/1999/xhtml" id="Copyright"></a><h4 xmlns="http://www.w3.org/1999/xhtml"></h4><img xmlns="http://www.w3.org/1999/xhtml" src="KhronosLogo.jpg" /><p xmlns="http://www.w3.org/1999/xhtml"></p>Copyright © 2007-2015 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.
</div>
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