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</style>
<title>clamp</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1" />
<meta name="keywords" content="clamp" />
</head>
<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="clamp"></a>
<h1>clamp</h1>
<p>
Clamp <code xmlns="http://www.w3.org/1999/xhtml" class="varname">x</code> to range given by <code xmlns="http://www.w3.org/1999/xhtml" class="varname">minval</code>, <code xmlns="http://www.w3.org/1999/xhtml" class="varname">maxval</code>.
</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">
gentype
<strong class="fsfunc">
clamp
</strong>
(</code>
<td>gentype <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">x</var>, </td>
</td>
</tr>
<tr valign="top">
<td> </td>
<td>gentype <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">minval</var>, </td>
</tr>
<tr valign="top">
<td> </td>
<td>gentype <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">maxval</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">
gentype
<strong class="fsfunc">
clamp
</strong>
(</code>
<td>gentype <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">x</var>, </td>
</td>
</tr>
<tr valign="top">
<td> </td>
<td>sgentype <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">minval</var>, </td>
</tr>
<tr valign="top">
<td> </td>
<td>sgentype <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">maxval</var><code>)</code></td>
</tr>
</table>
</div>
</div>
<div class="refsect1">
<a id="description"></a>
<h2>Description</h2>
<p>
<code class="function">clamp</code> returns
<a class="citerefentry" href="integerMax.html"><span class="citerefentry"><span class="refentrytitle">min</span></span></a>
(<a class="citerefentry" href="integerMax.html"><span class="citerefentry"><span class="refentrytitle">min</span></span></a>(
<code class="varname">x</code>, <code class="varname">minval</code>), <code class="varname">maxval</code>).
</p>
<p>
Results are undefined if <code class="varname">minval</code> &gt; <code class="varname">maxval</code>.
</p>
</div>
<div class="refsect1">
<a id="notes"></a>
<h2>Notes</h2>
<p>
General information about built-in integer functions:
Built-in integer functions take
scalar or vector arguments. The vector versions of the integer functions operate
component-wise. The description is per component.
</p>
<p>
We use the generic type name <span class="type">gentype</span> to indicate that the function
can take <span class="type">char</span>, <span class="type">char{2|3|4|8|16}</span>, <span class="type">uchar</span>,
<span class="type">uchar{2|3|4|8|16}</span>, <span class="type">short</span>, <span class="type">short{2|3|4|8|16}</span>,
<span class="type">ushort</span>, <span class="type">ushort{2|3|4|8|16}</span>, <span class="type">int</span>,
<span class="type">int{2|3|4|8|16}</span>, <span class="type">uint</span>, <span class="type">uint{2|3|4|8|16}</span>,
<span class="type">long</span>, <span class="type">long{2|3|4|8|16}</span>, <span class="type">ulong</span>, or
<span class="type">ulong{2|3|4|8|16}</span> as the type for the arguments. We use the generic type
name <span class="type">ugentype</span> to refer to unsigned versions of <span class="type">gentype</span>. For
example, if <span class="type">gentype</span> is <span class="type">char4</span>, <span class="type">ugentype</span> is
<span class="type">uchar4</span>.
</p>
<p>
We also use the generic type name <span class="type">sgentype</span> to indicate that the function can
take a scalar data type i.e. <span class="type">char</span>, <span class="type">uchar</span>, <span class="type">short</span>,
<span class="type">ushort</span>, <span class="type">int</span>, <span class="type">uint</span>, <span class="type">long</span>, or
<span class="type">ulong</span> as the type for the arguments. For built-in integer functions that
take <span class="type">gentype</span> and <span class="type">sgentype</span> arguments, the <span class="type">gentype</span>
argument must be a vector or scalar version of the <span class="type">sgentype</span> argument. For
example, if <span class="type">sgentype</span> is <span class="type">uchar</span>, <span class="type">gentype</span>
must be <span class="type">uchar</span> or <span class="type">uchar{2|3|4|8|16}</span>. For vector versions,
<span class="type">sgentype</span> is implicitly widened to <span class="type">gentype</span> as described in section 6.3.a
of the OpenCL specification.
</p>
<p>
For any specific use of a function, the actual type has to be the same for all
arguments and the return type unless otherwise specified.
</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-2.0-openclc.pdf#namedest=integerFunctions" target="OpenCL Spec">OpenCL Specification</a>
</p>
</div>
<div class="refsect1">
<a id="seealso"></a>
<h2>Also see</h2>
<p>
<a class="citerefentry" href="integerFunctions.html"><span class="citerefentry"><span class="refentrytitle">Integer 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
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