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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN"
"http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd">
<refentry>
<refentryinfo>
<keywordset>
<keyword>mul24</keyword>
</keywordset>
</refentryinfo>
<refmeta>
<refentrytitle>mul24</refentrytitle>
<refmiscinfo>
<copyright>
<year>2007-2011</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>3</manvolnum>
</refmeta>
<!-- ================================ SYNOPSIS -->
<refnamediv id="mul24">
<refname>mul24</refname>
<refpurpose>
Fast integer function to multiply 24-bit integer values.
</refpurpose>
</refnamediv>
<refsynopsisdiv xmlns:xlink="http://www.w3.org/1999/xlink"><title></title>
<funcsynopsis>
<funcprototype>
<funcdef>
gentype
<function>
mul24
</function>
</funcdef>
<paramdef>gentype<parameter>x</parameter></paramdef>
<paramdef>gentype<parameter>y</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<!-- ================================ DESCRIPTION -->
<refsect1 id="description"><title>Description</title>
<para>
<function>mul24</function> multiplies two 24-bit integer values
<varname>x</varname> and <varname>y</varname>. <varname>x</varname> and
<varname>y</varname> are 32-bit integers but only the low 24-bits are used
to perform the multiplication. <function>mul24</function> should only be
used when values in <varname>x</varname> and <varname>y</varname> are in the
range [-2<superscript>23</superscript>, 2<superscript>23</superscript>-1] if
<varname>x</varname> and <varname>y</varname> are signed integers and in the range [0,
2<superscript>24</superscript>-1] if <varname>x</varname> and <varname>y</varname>
are unsigned integers. If <varname>x</varname> and <varname>y</varname> are not in
this range, the multiplication result is implementation-defined.
</para>
</refsect1>
<!-- ================================ NOTES -->
<refsect1 id="notes"><title>Notes</title>
<para>
Fast integer functions can be used for optimizing performance of kernels. We
use the generic type name <type>gentype</type> to indicate that the function can
take <type>int</type>, <type>int2</type>, <type>int3</type>, <type>int4</type>,
<type>int8</type>, <type>int16</type>, <type>uint</type>, <type>uint2</type>,
<type>uint3</type>, <type>uint4</type>, <type>uint8</type>, or <type>uint16</type>
as the type for the arguments.
</para>
</refsect1>
<!-- ================================ EXAMPLE -->
<!-- DO NOT DELETE IN CASE AN EXAMPLE IS ADDED IN THE FUTURE -->
<!--
<refsect2 id="example1">
<title>
Example
</title>
<informaltable frame="none">
<tgroup cols="1" align="left" colsep="0" rowsep="0">
<colspec colname="col1" colnum="1" />
<tbody>
<row>
<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="integerFunctions">OpenCL Specification</olink>
</para>
</refsect1>
<!-- ================================ ALSO SEE -->
<refsect1 id="seealso"><title>Also see</title>
<para>
<citerefentry href="integerFunctions"><refentrytitle>Integer Functions</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>
<!-- 14-Oct-2011 -->
</refentry>
|
