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| <refentry> |
| <refentryinfo> |
| <keywordset> |
| <keyword> |
| async_work_group_copy |
| </keyword> |
| </keywordset> |
| </refentryinfo> |
| |
| <refmeta> |
| <refentrytitle>async_work_group_copy</refentrytitle> |
| |
| <refmiscinfo> |
| <copyright> |
| <year>2007-2009</year> |
| <holder>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.</holder> |
| </copyright> |
| </refmiscinfo> |
| <manvolnum>2</manvolnum> |
| </refmeta> |
| |
| <!-- ================================ SYNOPSIS --> |
| |
| <refnamediv id="async_work_group_copy"> |
| <refname>async_work_group_copy</refname> |
| |
| <refpurpose> |
| Perform an async copy. |
| </refpurpose> |
| </refnamediv> |
| |
| <refsynopsisdiv xmlns:xlink="http://www.w3.org/1999/xlink"><title></title> |
| <funcsynopsis> |
| <funcprototype> |
| <funcdef> |
| event_t |
| <function> |
| async_work_group_copy |
| </function> |
| </funcdef> |
| <paramdef>__local gentype<parameter>*dst</parameter></paramdef> |
| <paramdef>const __global gentype<parameter>*src</parameter></paramdef> |
| <paramdef><link xlink:href="scalarDataTypes.html">size_t</link> |
| <parameter>num_elements</parameter></paramdef> |
| <paramdef><link xlink:href="otherDataTypes.html">event_t</link><parameter>event</parameter></paramdef> |
| </funcprototype> |
| </funcsynopsis> |
| |
| <funcsynopsis> |
| <funcprototype> |
| <funcdef> |
| event_t |
| <function> |
| async_work_group_copy |
| </function> |
| </funcdef> |
| <paramdef>__global gentype<parameter>*dst</parameter></paramdef> |
| <paramdef>const __local gentype<parameter>*src</parameter></paramdef> |
| <paramdef><link xlink:href="scalarDataTypes.html">size_t</link><parameter>num_elements</parameter></paramdef> |
| <paramdef><link xlink:href="otherDataTypes.html">event_t</link><parameter>event</parameter></paramdef> |
| </funcprototype> |
| </funcsynopsis> |
| |
| </refsynopsisdiv> |
| |
| <!-- ================================ DESCRIPTION --> |
| |
| <refsect1 id="description"><title>Description</title> |
| <para> |
| The OpenCL C programming language implements these functions that provide asynchronous copies between global and local memory and a prefetch from global memory. |
| </para> |
| <para> |
| Perform an async copy of <varname>num_elements</varname> |
| <type>gentype</type> elements from <varname>src</varname> to <varname>dst</varname>. The async |
| copy 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 workgroup |
| executing the kernel with the same |
| argument values; otherwise the results are |
| undefined. |
| </para> |
| <para> |
| Returns an event object that can be used by |
| <citerefentry><refentrytitle>wait_group_events</refentrytitle></citerefentry> to wait for the async copy |
| to finish. The <varname>event</varname> argument can also be used |
| to associate the <function>async_work_group_copy</function> with |
| a previous async copy allowing an event to be |
| shared by multiple async copies; otherwise <varname>event</varname> |
| should be zero. |
| </para> |
| <para> |
| If <varname>event</varname> argument is non-zero, the event object |
| supplied in <varname>event</varname> argument will be returned. |
| </para> |
| <para> |
| This function does not perform any implicit |
| synchronization of source data such as using a |
| barrier before performing the copy. |
| </para> |
| </refsect1> |
| |
| |
| |
| <!-- ================================ NOTES --> |
| |
| <refsect1 id="notes"><title>Notes</title> |
| <para> |
| Returns an event object that can be used by <citerefentry><refentrytitle>wait_group_events</refentrytitle></citerefentry> to wait for the async copy to finish. |
| </para> |
| <para> |
| The generic type name <type>gentype</type> indicates the built-in data types <type>char</type>, <type>char{2|4|8|16}</type>, <type>uchar</type>, <type>uchar{2|4|8|16}</type>, <type>short</type>, <type>short{2|4|8|16}</type>, <type>ushort</type>, <type>ushort{2|4|8|16}</type>, <type>int</type>, <type>int{2|4|8|16}</type>, <type>uint</type>, <type>uint{2|4|8|16}</type>, <type>long</type>, <type>long{2|4|8|16}</type>, <type>ulong</type>, <type>ulong{2|4|8|16}</type> or <type>float</type>, <type>float{2|4|8|16}</type> as the type for the arguments unless otherwise stated. |
| </para> |
| <para> |
| If extended with <citerefentry><refentrytitle>cl_khr_fp64</refentrytitle></citerefentry>, generic type name <type>gentype</type> may indicate <type>double</type> and <type>double{2|4|8|16}</type> as arguments and return values. If extended with <citerefentry><refentrytitle>cl_khr_fp16</refentrytitle></citerefentry>, generic type name <type>gentype</type> may indicate <type>half</type> and <type>half{2|4|8|16}</type> as arguments and return values. |
| </para> |
| </refsect1> |
| |
| <!-- ================================ EXAMPLE --> |
| <!-- DO NOT DELETE IN CASE AN EXAMPLE IS ADDED IN THE FUTURE --> |
| <!-- |
| <refsect2 id="example1"> |
| <title> |
| Example |
| </title> |
| |
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| <entry> |
| Example goes here - it will be set in "code" type with white space preserved. |
| </entry> |
| </row> |
| </tbody> |
| </tgroup> |
| </informaltable> |
| </refsect2> |
| --> |
| |
| |
| <!-- ================================ SPECIFICATION --> |
| <!-- Set the "uri" attribute in the <olink /> element to the "named destination" for the PDF page--> |
| |
| <refsect1 id="specification"><title>Specification</title> |
| <para> |
| <imageobject> |
| <imagedata fileref="pdficon_small1.gif" format="gif" /> |
| </imageobject> |
| |
| <olink uri="asyncCopyFunctions">OpenCL Specification</olink> |
| </para> |
| </refsect1> |
| |
| |
| <!-- ================================ ALSO SEE --> |
| |
| <refsect1 id="seealso"><title>Also see</title> |
| <para> |
| <citerefentry href="asyncCopyFunctions"><refentrytitle>Async Copy and Prefetch Functions</refentrytitle></citerefentry>, |
| <citerefentry><refentrytitle>wait_group_events</refentrytitle></citerefentry> |
| </para> |
| </refsect1> |
| |
| |
| |
| <!-- ============================== COPYRIGHT --> |
| <!-- Content included from copyright.inc.xsl --> |
| |
| <refsect3 id="Copyright"><title></title> |
| <imageobject> |
| <imagedata fileref="KhronosLogo.jpg" format="jpg" /> |
| </imageobject> |
| <para /> |
| </refsect3> |
| |
| </refentry> |
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