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| <refentry> |
| <refentryinfo> |
| <keywordset> |
| <keyword> |
| cl_khr_byte_addressable_store |
| </keyword> |
| </keywordset> |
| </refentryinfo> |
| |
| <refmeta> |
| <refentrytitle>cl_khr_byte_addressable_store</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="cl_khr_byte_addressable_store"> |
| <refname>cl_khr_byte_addressable_store</refname> |
| |
| <refpurpose> |
| Enable extension to remove restrictions on byte-addressable stores. |
| </refpurpose> |
| </refnamediv> |
| |
| |
| <!-- ALTERNATIVE SYNTAX SYNOPSIS (NON-FUNCTION) --> |
| <refsect2 id="synopsis"> |
| <title> |
| </title> |
| |
| <informaltable frame="none"> |
| <tgroup cols="1" align="left" colsep="0" rowsep="0"> |
| <colspec colname="col1" colnum="1" /> |
| <tbody> |
| <row> |
| <entry> |
| #pragma OPENCL EXTENSION cl_khr_byte_addressable_store : enable |
| </entry> |
| </row> |
| </tbody> |
| </tgroup> |
| </informaltable> |
| </refsect2> |
| |
| |
| <!-- ================================ DESCRIPTION --> |
| |
| <refsect1 id="description"><title>Description</title> |
| <para> |
| The OpenCL extension <function>cl_khr_byte_addressable_store</function> removes certain restrictions on built-in types <type>char</type>, <type>uchar</type>, <type>char2</type>, <type>uchar2</type>, <type>short</type>, |
| and <type>half</type>. An application that wants to be able to write to elements of a pointer (or struct) that |
| are of type <type>char</type>, <type>uchar</type>, <type>char2</type>, <type>uchar2</type>, <type>short</type>, <type>ushort</type>, and <type>half</type> will need to include |
| the <function>#pragma OPENCL EXTENSION cl_khr_byte_addressable_store : enable</function> directive before any code that performs writes that may not be supported. |
| </para> |
| |
| </refsect1> |
| |
| |
| <!-- ================================ NOTES --> |
| |
| <!-- refsect1 id="notes"><title>Notes</title> |
| <para> |
| |
| </para> |
| </refsect1 --> |
| |
| |
| <!-- ================================ EXAMPLE --> |
| |
| <refsect2 id="example1"> |
| <title> |
| Example |
| </title> |
| |
| <para> |
| In this example the last two lines will compile and work |
| correctly if the <function>cl_khr_byte_addressable_store</function> extension is supported. |
| </para> |
| |
| <informaltable frame="none"> |
| <tgroup cols="1" align="left" colsep="0" rowsep="0"> |
| <colspec colname="col1" colnum="1" /> |
| <tbody> |
| <row> |
| <entry> |
| __kernel void |
| do_proc (__global char *pA, short b, __global short *pB) |
| { |
| char x[100]; |
| __private char *px = x; |
| int id = (int)get_global_id(0); |
| short f; |
| |
| f = pB[id] + b; |
| |
| px[1] = pA[1]; // no longer an error. |
| |
| pB[id] = b; // no longer an error. |
| }</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="cl_khr_byte_addressable_store">OpenCL Specification</olink> |
| </para> |
| </refsect1> |
| |
| |
| <!-- ================================ ALSO SEE --> |
| |
| <refsect1 id="seealso"><title>Also see</title> |
| <para> |
| <citerefentry><refentrytitle>EXTENSION</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> |
| |