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| <title>cl_khr_int64_extended_atomics</title> |
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| <a id="idm1"></a> |
| <div class="titlepage"></div> |
| <div xmlns="" class="refnamediv"> |
| <a xmlns="http://www.w3.org/1999/xhtml" id="cl_khr_int64_extended_atomics"></a> |
| <h1>cl_khr_int64_extended_atomics</h1> |
| <p> |
| Optional extensions that implement atomic operations |
| on 64-bit signed and unsigned integers to locations in <code xmlns="http://www.w3.org/1999/xhtml" class="constant">__global</code> and <code xmlns="http://www.w3.org/1999/xhtml" class="constant">__local</code> memory. |
| </p> |
| </div> |
| <div class="refsect2"> |
| <a id="synopsis"></a> |
| <h3> |
| </h3> |
| <div class="informaltable"> |
| <table class="informaltable" border="0"> |
| <colgroup> |
| <col align="left" class="col1" /> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td align="left"> |
| #pragma OPENCL EXTENSION cl_khr_int64_extended_atomics : enable |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a id="description"></a> |
| <h2>Description</h2> |
| <p> |
| An application that wants to use this extension will need to include the |
| <code class="function">#pragma OPENCL EXTENSION cl_khr_int64_extended_atomics : enable</code> |
| directive in the OpenCL program source. |
| </p> |
| <p> |
| The atomic functions supported by the <code class="function">cl_khr_int64_extended_atomics</code> extension are |
| described in the following table. All of the functions listed in the following table are performed in one atomic transaction. |
| </p> |
| <p> |
| These transactions are atomic for the device executing these atomic functions. There is no |
| guarantee of atomicity if the atomic operations to the same memory location are being performed |
| by kernels executing on multiple devices. |
| </p> |
| <div class="informaltable"> |
| <table class="informaltable" border="1"> |
| <colgroup> |
| <col align="left" class="col1" /> |
| <col align="left" class="col2" /> |
| </colgroup> |
| <thead> |
| <tr> |
| <th align="left">Function</th> |
| <th align="left">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td align="left"> |
| <div class="literallayout"><p><br /> |
| long <code class="function">atom_min</code> (__global long *<code class="varname">p</code>, long <code class="varname">val</code>)<br /> |
| <br /> |
| long <code class="function">atom_min</code> (__local long *<code class="varname">p</code>, long <code class="varname">val</code>)<br /> |
| <br /> |
| ulong <code class="function">atom_min</code> (__global ulong *<code class="varname">p</code>, ulong <code class="varname">val</code>)<br /> |
| <br /> |
| ulong <code class="function">atom_min</code> (__local ulong *<code class="varname">p</code>, ulong <code class="varname">val</code>)<br /> |
| </p></div> |
| </td> |
| <td align="left"> |
| Read the 64-bit value (referred to as <code class="varname">old</code>) |
| stored at location pointed by <code class="varname">p</code>. Compute |
| <code class="function">min</code>(<code class="varname">old</code>, <code class="varname">val</code>) and store minimum value at location |
| pointed by <code class="varname">p</code>. The function returns <code class="varname">old</code>. |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <p> |
| long <code class="function">atom_max</code> (__global long *<code class="varname">p</code>, long <code class="varname">val</code>) |
| </p> |
| |
| <p> |
| long <code class="function">atom_max</code> (__local long *<code class="varname">p</code>, long <code class="varname">val</code>) |
| </p> |
| |
| <p> |
| ulong <code class="function">atom_max</code> (__global ulong *<code class="varname">p</code>, ulong <code class="varname">val</code>) |
| </p> |
| |
| <p> |
| ulong <code class="function">atom_max</code> (__local ulong *<code class="varname">p</code>, ulong <code class="varname">val</code>) |
| </p> |
| </td> |
| <td align="left"> |
| Read the 64-bit value (referred to as <code class="varname">old</code>) |
| stored at location pointed by <code class="varname">p</code>. Compute |
| <code class="function">max</code>(<code class="varname">old</code>, <code class="varname">val</code>) and store maximum value at location |
| pointed by <code class="varname">p</code>. The function returns <code class="varname">old</code>. |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <p> |
| long <code class="function">atom_and</code> (__global long *<code class="varname">p</code>, long <code class="varname">val</code>) |
| </p> |
| |
| <p> |
| long <code class="function">atom_and</code> (__local long *<code class="varname">p</code>, long <code class="varname">val</code>) |
| </p> |
| |
| <p> |
| ulong <code class="function">atom_and</code> (__global ulong *<code class="varname">p</code>, ulong <code class="varname">val</code>) |
| </p> |
| |
| <p> |
| ulong <code class="function">atom_and</code> (__local ulong *<code class="varname">p</code>, ulong <code class="varname">val</code>) |
| </p> |
| </td> |
| <td align="left"> |
| Read the 64-bit value (referred to as <code class="varname">old</code>) |
| stored at location <code class="varname">p</code>. Compute |
| (<code class="varname">old</code> & val) and store result at location pointed to |
| by <code class="varname">p</code>. The function returns <code class="varname">old</code>. |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <p> |
| long <code class="function">atom_or</code> (__global long *<code class="varname">p</code>, long <code class="varname">val</code>) |
| </p> |
| |
| <p> |
| long <code class="function">atom_or</code> (__local long *<code class="varname">p</code>, long <code class="varname">val</code>) |
| </p> |
| |
| <p> |
| ulong <code class="function">atom_or</code> (__global ulong *<code class="varname">p</code>, ulong <code class="varname">val</code>) |
| </p> |
| |
| <p> |
| ulong <code class="function">atom_or</code> (__local ulong *<code class="varname">p</code>, ulong <code class="varname">val</code>) |
| </p> |
| </td> |
| <td align="left"> |
| Read the 64-bit value (referred to as <code class="varname">old</code>) |
| stored at location <code class="varname">p</code>. Compute |
| (<code class="varname">old</code> | val) and store result at location pointed to |
| by <code class="varname">p</code>. The function returns <code class="varname">old</code>. |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <p> |
| long <code class="function">atom_xor</code> (__global long *<code class="varname">p</code>, long <code class="varname">val</code>) |
| </p> |
| |
| <p> |
| long <code class="function">atom_xor</code> (__local long *<code class="varname">p</code>, long <code class="varname">val</code>) |
| </p> |
| |
| <p> |
| ulong <code class="function">atom_xor</code> (__global ulong *<code class="varname">p</code>, ulong <code class="varname">val</code>) |
| </p> |
| |
| <p> |
| ulong <code class="function">atom_xor</code> (__local ulong *<code class="varname">p</code>, ulong <code class="varname">val</code>) |
| </p> |
| </td> |
| <td align="left"> |
| Read the 64-bit value (referred to as <code class="varname">old</code>) |
| stored at location <code class="varname">p</code>. Compute |
| (<code class="varname">old</code> ^ val) and store result at location pointed to |
| by <code class="varname">p</code>. The function returns <code class="varname">old</code>. |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </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=249" 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. |
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| 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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