sdk/1.1/docs/man/vloada_halfn.xml

<?xml version="1.0" encoding="UTF-8"?>
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<!ENTITY vectorFunctionsInc SYSTEM "vectorFunctionsInc.xml">
]>
<refentry>
    <refentryinfo>
        <keywordset>
            <keyword>vloada_halfn</keyword>
        </keywordset>
    </refentryinfo>

    <refmeta>                                    
        <refentrytitle>vloada_halfn</refentrytitle>

        <refmiscinfo>
            <copyright>
                <year>2007-2010</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="vloada_halfn>">             
        <refname>vloada_half<replaceable>n</replaceable></refname> 

        <refpurpose>
            Read half float vector from a pointer to memory.
        </refpurpose>
    </refnamediv>


    <refsynopsisdiv xmlns:xlink="http://www.w3.org/1999/xlink"><title></title>
        <funcsynopsis>
            <funcprototype>
                <funcdef>
                    <link xlink:href="vectorDataTypes.html">float<replaceable>n</replaceable></link>
                    <function>                   
                        vloada_half<replaceable>n</replaceable>
                    </function>
                </funcdef>      
<paramdef><link xlink:href="scalarDataTypes.html">size_t</link><parameter>offset</parameter></paramdef>
<paramdef><link xlink:href="global.html">__global</link> <link xlink:href="scalarDataTypes.html">half</link><parameter>*p</parameter></paramdef>            
</funcprototype>
        </funcsynopsis>     
         <funcsynopsis>
            <funcprototype>
                <funcdef>
                    <link xlink:href="vectorDataTypes.html">float<replaceable>n</replaceable></link>
                    <function>                   
                        vloada_half<replaceable>n</replaceable>_rte
                    </function>
                </funcdef>      
<paramdef><link xlink:href="scalarDataTypes.html">size_t</link><parameter>offset</parameter></paramdef>
<paramdef><link xlink:href="local.html">__local</link> <link xlink:href="scalarDataTypes.html">half</link><parameter>*p</parameter></paramdef>            
</funcprototype>
        </funcsynopsis>  
        <funcsynopsis>
            <funcprototype>
                <funcdef>
                    <link xlink:href="vectorDataTypes.html">float<replaceable>n</replaceable></link>
                    <function>                   
                        vloada_half<replaceable>n</replaceable>_rtz
                    </function>
                </funcdef>      
<paramdef><link xlink:href="scalarDataTypes.html">size_t</link><parameter>offset</parameter></paramdef>
<paramdef><link xlink:href="constant.html">__constant</link> <link xlink:href="scalarDataTypes.html">half</link><parameter>*p</parameter></paramdef>            
</funcprototype>
        </funcsynopsis>  
         <funcsynopsis>
            <funcprototype>
                <funcdef>
                    <link xlink:href="vectorDataTypes.html">float<replaceable>n</replaceable></link>
                    <function>                   
                        vloada_half<replaceable>n</replaceable>_rtp
                    </function>
                </funcdef>      
<paramdef><link xlink:href="scalarDataTypes.html">size_t</link><parameter>offset</parameter></paramdef>
<paramdef><link xlink:href="private.html">__private</link> <link xlink:href="scalarDataTypes.html">half</link><parameter>*p</parameter></paramdef>            
          
</funcprototype>
        </funcsynopsis>  
    </refsynopsisdiv>           

<!-- ================================ DESCRIPTION  -->

    <refsect1 id="description"><title>Description</title>
        <para>
        For <replaceable>n</replaceable> = 1, 2, 4, 8 and 16 read sizeof(half<replaceable>n</replaceable>) bytes of data from address (<varname>p</varname> + (<varname>offset</varname> * <varname>n</varname>)). The data read is interpreted as a half<replaceable>n</replaceable> value. The half<replaceable>n</replaceable> value read is converted to a floatn value and the float<replaceable>n</replaceable> value is returned.
    </para>
    <para>
The address computed as (<varname>p</varname> + (<varname>offset</varname> * <varname>n</varname>)) must be aligned to sizeof(half<varname>n</varname>) bytes.
    </para>
    <para>
For <replaceable>n</replaceable> = 3, <function>vloada_half3</function> reads a half3 from address (<varname>p</varname> + (<varname>offset</varname> * 4)) and returns a float3.
    </para>
    <para>
The address computed as (<varname>p</varname> + (<varname>offset</varname> * 4))
must be aligned to sizeof (half) * 4 bytes.
    </para>     

    </refsect1>

<!-- ================================ NOTES  -->
    <refsect1 id="notes"><title>Notes</title>
        &vectorFunctionsInc;
        <para>
        <function>vload3</function> and <function>vload_half3</function> read <varname>x</varname>, <varname>y</varname>, <varname>z</varname> components from address (<varname>p</varname> + (<varname>offset</varname> * 3)) into a 3-component vector. vstore3, and <function>vstore_half3</function> write <varname>x</varname>, <varname>y</varname>, <varname>z</varname> components from a 3-component vector to address (<varname>p</varname> + (<varname>offset</varname> * 3)).
        </para>
        <para>
In addition <function>vloada_half3</function> reads <varname>x</varname>, <varname>y</varname>, <varname>z</varname> components from address (<varname>p</varname> + (<varname>offset</varname> * 4)) into a 3-
component vector and <function>vstorea_half3</function> writes <varname>x</varname>, <varname>y</varname>, <varname>z</varname> components from a 3-component vector to
address (<varname>p</varname> + (<varname>offset</varname> * 4)).
        </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="vectorDataLoadandStoreFunctions">OpenCL Specification</olink>
        </para>
    </refsect1>


<!-- ================================ ALSO SEE  -->

    <refsect1 id="seealso"><title>Also see</title>
        <para>
            <citerefentry href="vectorDataLoadandStoreFunctions"><refentrytitle>Vector Data Load and Store 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>

</refentry>