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    <title>cl_khr_fp16</title>
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        <a xmlns="http://www.w3.org/1999/xhtml" id="cl_khr_fp16"></a>
        <h1>cl_khr_fp16</h1>
        <p>
            Optional half floating-point support.
        </p>
      </div>
      <div class="refsect2">
        <a id="synopsis"></a>
        <h3>
        </h3>
        <div class="informaltable">
          <table class="informaltable" border="0">
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              <col align="left" class="col1" />
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                <td align="left">
#pragma OPENCL EXTENSION cl_khr_fp16 : enable
                        </td>
              </tr>
            </tbody>
          </table>
        </div>
      </div>
      <div class="refsect1">
        <a id="description"></a>
        <h2>Description</h2>
        <p>
OpenCL 1.0 supports half as a storage format only in the core specification. This extension adds
support for half scalar and vector types as built-in types that can be used for arithmetic
operations, conversions etc. An application that wants to use <span class="type">half</span> and <code class="constant">halfn</code> types will need
to include the directive shown above.
The list of built-in scalar, and vector data types defined in tables 6.1, and 6.2 are extended to
include the types in the table below.
        </p>
        <p>
The built-in vector data types for <code class="constant">halfn</code> are also declared as appropriate types in the OpenCL
API (and header files) that can be used by an application. The following table describes the
built-in vector data types for <code class="constant">halfn</code> as defined in the OpenCL C programming language and the
corresponding data type available to the application:

            </p>
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              <tr>
                <th align="left">Type in OpenCL Language</th>
                <th align="left">Description</th>
                <th align="left">API type for application</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td align="left">half2</td>
                <td align="left">2-component half-precision floating-point vector</td>
                <td align="left">cl_half2</td>
              </tr>
              <tr>
                <td align="left">half4</td>
                <td align="left">4-component half-precision floating-point vector</td>
                <td align="left">cl_half4</td>
              </tr>
              <tr>
                <td align="left">half8</td>
                <td align="left">8-component half-precision floating-point vector</td>
                <td align="left">cl_half8</td>
              </tr>
              <tr>
                <td align="left">half16</td>
                <td align="left">16-component half-precision floating-point vector</td>
                <td align="left">cl_half16</td>
              </tr>
            </tbody>
          </table>
        </div>
        <p>
        </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=253" target="OpenCL Spec">OpenCL Specification</a>
        </p>
      </div>
      <div class="refsect1">
        <a id="seealso"></a>
        <h2>Also see</h2>
        <p>
            <a class="citerefentry" href="EXTENSION.html"><span class="citerefentry"><span class="refentrytitle">EXTENSION</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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