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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN"
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"http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd">
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<keyword>cl_khr_int64_extended_atomics</keyword>
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<refentrytitle>cl_khr_int64_extended_atomics</refentrytitle>
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<year>2007-2011</year>
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<holder>The Khronos Group Inc.
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and/or associated documentation files (the
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"Materials"), to deal in the Materials without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Materials, and to
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permit persons to whom the Materials are furnished to do so, subject to
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the condition that this copyright notice and permission notice shall be included
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in all copies or substantial portions of the Materials.</holder>
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<manvolnum>3</manvolnum>
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<!-- ================================ SYNOPSIS -->
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<refnamediv id="cl_khr_int64_extended_atomics">
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<refname>cl_khr_int64_extended_atomics</refname>
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Optional extensions that implement atomic operations on 64-bit signed and unsigned integers to locations in __global and __local memory.
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<!-- ALTERNATIVE SYNTAX SYNOPSIS (NON-FUNCTION) -->
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<refsect2 id="synopsis">
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<informaltable frame="none">
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<tgroup cols="1" align="left" colsep="0" rowsep="0">
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<colspec colname="col1" colnum="1" />
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#pragma OPENCL EXTENSION cl_khr_int64_extended_atomics : enable
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<!-- ================================ DESCRIPTION -->
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<refsect1 id="description" xmlns:xlink="http://www.w3.org/1999/xlink"><title>Description</title>
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An application that wants to use this extension will need to include the
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<function>#pragma OPENCL EXTENSION cl_khr_int64_extended_atomics : enable</function>
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directive in the OpenCL program source.
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The atomic functions supported by the <function>cl_khr_int64_extended_atomics</function>
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extension are described in the following table. All of the functions listed in the
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following table are performed in one atomic transaction.
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These transactions are atomic for the device executing these atomic functions. There
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is no guarantee of atomicity if the atomic operations to the same memory location
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are being performed by kernels executing on multiple devices.
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Atomic operations on 64-bit integers and 32-bit integers (and float) are also atomic
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<informaltable frame="all">
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<tgroup cols="2" align="left" colsep="1" rowsep="1">
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<colspec colname="col1" colnum="1" />
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<colspec colname="col2" colnum="2" />
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<entry>Function</entry>
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<entry>Description</entry>
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<entry><citerefentry><refentrytitle>atom_min</refentrytitle></citerefentry></entry>
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<link xlink:href="commonMin.html">min</link>
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(<varname>old</varname>, <varname>val</varname>)</entry>
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<entry><citerefentry><refentrytitle>atom_max</refentrytitle></citerefentry></entry>
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<link xlink:href="commonMin.html">max</link>
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(<varname>old</varname>, <varname>val</varname>)></entry>
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<entry><citerefentry><refentrytitle>atom_and</refentrytitle></citerefentry></entry>
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<entry>Compute (<varname>old</varname> & <varname>val</varname>)</entry>
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<entry><citerefentry><refentrytitle>atom_or</refentrytitle></citerefentry></entry>
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<entry>Compute (<varname>old</varname> | <varname>val</varname>)</entry>
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<entry><citerefentry><refentrytitle>atom_xor</refentrytitle></citerefentry></entry>
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<entry>Compute (<varname>old</varname> ^ <varname>val</varname>)</entry>
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<!-- ================================ NOTES -->
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<!-- refsect1 id="notes"><title>Notes</title>
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<!-- ================================ EXAMPLE -->
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<!-- DO NOT DELETE IN CASE AN EXAMPLE IS ADDED IN THE FUTURE -->
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<refsect2 id="example1">
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<informaltable frame="none">
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<tgroup cols="1" align="left" colsep="0" rowsep="0">
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<colspec colname="col1" colnum="1" />
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Example goes here - it will be set in "code" type with white space preserved.
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<!-- ================================ SPECIFICATION -->
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<!-- Set the "uri" attribute in the <olink /> element to the "named destination" for the PDF page
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<refsect1 id="specification"><title>Specification</title>
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<imagedata fileref="pdficon_small1.gif" format="gif" />
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<olink uri="cl_khr_int64_extended_atomics">OpenCL Specification</olink>
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<!-- ================================ ALSO SEE -->
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<refsect1 id="seealso"><title>Also see</title>
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<citerefentry><refentrytitle>EXTENSION</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>cl_khr_int64_base_atomics</refentrytitle></citerefentry>,
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<citerefentry href="atomicFunctions"><refentrytitle>Atomic Functions</refentrytitle></citerefentry>
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<!-- ============================== COPYRIGHT -->
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<!-- Content included from copyright.inc.xsl -->
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<refsect3 id="Copyright"><title></title>
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<imagedata fileref="KhronosLogo.jpg" format="jpg" />
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