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    <title>nan</title>
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        <a xmlns="http://www.w3.org/1999/xhtml" id="nan"></a>
        <h1>nan</h1>
        <p>
            Quiet NaN
        </p>
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        <h2></h2>
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                <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
                    gentype
                    <strong class="fsfunc">                   
                        nan
                    </strong>
                (</code>
                <td>uint<em xmlns="http://www.w3.org/1999/xhtml" class="replaceable">n</em> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">nancode</var><code>)</code></td>
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      <div class="refsect2">
        <a id="double"></a>
        <h3></h3>
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                <td align="left">
double<em class="replaceable"><code>n</code></em> <code class="function">nan</code> (<span class="type">ulong<em class="replaceable"><code>n</code></em></span> <code class="varname">nancode</code>)      // if double extension enabled 
</td>
              </tr>
              <tr>
                <td align="left">
half<em class="replaceable"><code>n</code></em> <code class="function">nan</code> (<span class="type">ushort<em class="replaceable"><code>n</code></em></span> <code class="varname">nancode</code>)      // if half extension enabled 
</td>
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      <div class="refsect1">
        <a id="description"></a>
        <h2>Description</h2>
        <p>
			<code class="function">nan</code> returns a quiet NaN. The <code class="varname">nancode</code> may be placed in the significand of the resulting NaN.
		</p>
      </div>
      <div class="refsect1">
        <a id="notes"></a>
        <h2>Notes</h2>
        <p>
		The vector versions of the math functions operate component-wise. The description is per-component.
		</p>
        <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>
		This built-in math function takes scalar or vector arguments. The generic type name <span class="type">gentype</span> is used to indicate that the function can take <span class="type">float</span>, <span class="type">float2</span>, <span class="type">float4</span>, <span class="type">float8</span>, or <span class="type">float16</span> as the type for the arguments. For any specific
use of these function, the actual type has to be the same for all arguments and the return type.
		</p>
        <p>
		If extended with <a class="citerefentry" href="cl_khr_fp64.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_fp64</span></span></a>, generic type name <span class="type">gentype</span> may indicate <span class="type">double</span> and <span class="type">double{2|4|8|16}</span> as arguments and return values. If extended with <a class="citerefentry" href="cl_khr_fp16.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_fp16</span></span></a>, generic type name <span class="type">gentype</span> may indicate <span class="type">half</span> and <span class="type">half{2|4|8|16}</span> as arguments and return values. 
		</p>
      </div>
      <div class="refsect1">
        <a id="specification"></a>
        <h2>Specification</h2>
        <p>
            <img src="pdficon_small1.gif" />
                                                 
            <a href="http://www.khronos.org/registry/cl/specs/opencl-1.0.pdf#page=170" 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 © 2007-2009 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. 
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