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| <title>async_work_group_strided_copy</title> |
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| <div xmlns="" class="refnamediv"> |
| <a xmlns="http://www.w3.org/1999/xhtml" id="async_work_group_copy"></a> |
| <h1>async_work_group_strided_copy</h1> |
| <p> |
| Performs an async gather of <code xmlns="http://www.w3.org/1999/xhtml" class="varname">num_elements</code> <span xmlns="http://www.w3.org/1999/xhtml" class="type">gentype</span> elements from source to destination. |
| </p> |
| </div> |
| <div class="refsynopsisdiv"> |
| <h2></h2> |
| <div class="funcsynopsis"> |
| <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"> |
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| <td> |
| <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef"> |
| <a class="link" href="otherDataTypes.html" target="pagedisplay">event_t</a> |
| <strong class="fsfunc"> |
| async_work_group_strided_copy |
| </strong> |
| (</code> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="local.html" target="pagedisplay">__local</a> gentype <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*dst</var>, </td> |
| </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td>const <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="global.html" target="pagedisplay">__global</a> gentype <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*src</var>, </td> |
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| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">num_gentypes</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">src_stride</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="otherDataTypes.html" target="pagedisplay">event_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">event</var><code>)</code></td> |
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| </div> |
| <div class="funcsynopsis"> |
| <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"> |
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| <td> |
| <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef"> |
| <a class="link" href="otherDataTypes.html" target="pagedisplay">event_t</a> |
| <strong class="fsfunc"> |
| async_work_group_strided_copy |
| </strong> |
| (</code> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="global.html" target="pagedisplay">__global</a> gentype <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*dst</var>, </td> |
| </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td>const <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="local.html" target="pagedisplay">__local</a> gentype <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*src</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">num_gentypes</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">dst_stride</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="otherDataTypes.html" target="pagedisplay">event_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">event</var><code>)</code></td> |
| </tr> |
| </table> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a id="description"></a> |
| <h2>Description</h2> |
| <p> |
| <code class="function">async_work_group_strided_copy</code> performs an async gather of |
| <code class="varname">num_gentypes</code> <span class="type">gentype</span> elements |
| from <code class="varname">src</code> to <code class="varname">dst</code>. The <code class="varname">src_stride</code> |
| is the stride in elements for each <span class="type">gentype</span> element read from |
| <code class="varname">src</code>. The async |
| gather is performed by all work-items in a work-group and this built-in |
| function must therefore be encountered by |
| all work-items in a work-group executing |
| the kernel with the same argument values; |
| otherwise the results are undefined. |
| This rule applies to ND-ranges implemented with uniform |
| and non-uniform work-groups. |
| </p> |
| <p> |
| Returns an event object that can be used by |
| <a class="citerefentry" href="wait_group_events.html"><span class="citerefentry"><span class="refentrytitle">wait_group_events</span></span></a> |
| to wait for the async copy to finish. The <code class="varname">event</code> argument can |
| also be used to associate the <code class="function">async_work_group_strided_copy</code> |
| with a previous async copy allowing an event to be shared by multiple async copies; |
| otherwise <code class="varname">event</code> should be zero. |
| </p> |
| <p> |
| If <code class="varname">event</code> argument is non-zero, the event object supplied in |
| <code class="varname">event</code> argument will be returned. |
| </p> |
| <p> |
| This function does not perform any implicit synchronization of source data such as |
| using a <a class="citerefentry" href="barrier.html"><span class="citerefentry"><span class="refentrytitle">barrier</span></span></a> before |
| performing the copy. |
| </p> |
| <p> |
| The behavior of <code class="function">async_work_group_strided_copy</code> is undefined |
| if <code class="varname">src_stride</code> or <code class="varname">dst_stride</code> is 0, or if the |
| <code class="varname">src_stride</code> or <code class="varname">dst_stride</code> values cause the |
| <code class="varname">src</code> or <code class="varname">dst</code> pointers to exceed the upper bounds |
| of the address space during the copy. |
| </p> |
| <p> |
| General information about async copy functions: |
| The generic type name <span class="type">gentype</span> indicates the built-in data |
| types <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>, |
| <span class="type">ulong{2|3|4|8|16}</span>, <span class="type">float</span>, <span class="type">float{2|3|4|8|16}</span>, or |
| <span class="type">double</span>, <span class="type">double{2|3|4|8|16}</span> |
| as the type for the arguments unless otherwise stated. |
| </p> |
| <p> |
| When extended by the |
| <a class="citerefentry" href="cl_khr_fp16.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_fp16</span></span></a> extension, |
| the generic type <span class="type">gentype<em class="replaceable"><code>n</code></em></span> is extended to |
| include <span class="type">half</span>, <span class="type">half2</span>, <span class="type">half3</span>, <span class="type">half4</span>, |
| <span class="type">half8</span>, and <span class="type">half16</span>. |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="notes"></a> |
| <h2>Notes</h2> |
| <p> |
| <code class="function">async_work_group_copy</code> and |
| <code class="function">async_work_group_strided_copy</code> for 3-component |
| vector types behave as <code class="function">async_work_group_copy</code> and |
| <code class="function">async_work_group_strided_copy</code> respectively for 4-component vector |
| types. |
| </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=100" target="OpenCL Spec">OpenCL Specification</a> |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="seealso"></a> |
| <h2>Also see</h2> |
| <p> |
| <a class="citerefentry" href="asyncCopyFunctions.html"><span class="citerefentry"><span class="refentrytitle">Async Copy and Prefetch 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 |
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| in all copies or substantial portions of the Materials. |
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