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| <title>vloada_halfn</title> |
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| </head> |
| <body> |
| <div class="refentry"> |
| <a id="idp2528"></a> |
| <div class="titlepage"></div> |
| <div xmlns="" class="refnamediv"> |
| <a xmlns="http://www.w3.org/1999/xhtml" id="vloada_halfn>"></a> |
| <h1>vloada_halfn</h1> |
| <p> |
| Read half float vector from a pointer to memory. |
| </p> |
| </div> |
| <div class="refsynopsisdiv"> |
| <h2></h2> |
| <div class="funcsynopsis"> |
| <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"> |
| <tr valign="bottom"> |
| <td> |
| <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef"> |
| <a class="link" href="vectorDataTypes.html" target="_top">float<em class="replaceable"><code>n</code></em></a> |
| <strong class="fsfunc"> |
| vloada_half<em class="replaceable">n</em> |
| </strong> |
| (</code> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="_top">size_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">offset</var>, </td> |
| </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="global.html" target="_top">__global</a> <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="_top">half</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*p</var><code>)</code></td> |
| </tr> |
| </table> |
| </div> |
| <div class="funcsynopsis"> |
| <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"> |
| <tr valign="bottom"> |
| <td> |
| <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef"> |
| <a class="link" href="vectorDataTypes.html" target="_top">float<em class="replaceable"><code>n</code></em></a> |
| <strong class="fsfunc"> |
| vloada_half<em class="replaceable">n</em>_rte |
| </strong> |
| (</code> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="_top">size_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">offset</var>, </td> |
| </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="local.html" target="_top">__local</a> <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="_top">half</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*p</var><code>)</code></td> |
| </tr> |
| </table> |
| </div> |
| <div class="funcsynopsis"> |
| <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"> |
| <tr valign="bottom"> |
| <td> |
| <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef"> |
| <a class="link" href="vectorDataTypes.html" target="_top">float<em class="replaceable"><code>n</code></em></a> |
| <strong class="fsfunc"> |
| vloada_half<em class="replaceable">n</em>_rtz |
| </strong> |
| (</code> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="_top">size_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">offset</var>, </td> |
| </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="constant.html" target="_top">__constant</a> <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="_top">half</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*p</var><code>)</code></td> |
| </tr> |
| </table> |
| </div> |
| <div class="funcsynopsis"> |
| <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"> |
| <tr valign="bottom"> |
| <td> |
| <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef"> |
| <a class="link" href="vectorDataTypes.html" target="_top">float<em class="replaceable"><code>n</code></em></a> |
| <strong class="fsfunc"> |
| vloada_half<em class="replaceable">n</em>_rtp |
| </strong> |
| (</code> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="_top">size_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">offset</var>, </td> |
| </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="private.html" target="_top">__private</a> <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="_top">half</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*p</var><code>)</code></td> |
| </tr> |
| </table> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a id="description"></a> |
| <h2>Description</h2> |
| <p> |
| For <em class="replaceable"><code>n</code></em> = 1, 2, 4, 8 and 16 read sizeof(half<em class="replaceable"><code>n</code></em>) bytes of data from address (<code class="varname">p</code> + (<code class="varname">offset</code> * <code class="varname">n</code>)). The data read is interpreted as a half<em class="replaceable"><code>n</code></em> value. The half<em class="replaceable"><code>n</code></em> value read is converted to a floatn value and the float<em class="replaceable"><code>n</code></em> value is returned. |
| </p> |
| <p> |
| The address computed as (<code class="varname">p</code> + (<code class="varname">offset</code> * <code class="varname">n</code>)) must be aligned to sizeof(half<code class="varname">n</code>) bytes. |
| </p> |
| <p> |
| For <em class="replaceable"><code>n</code></em> = 3, <code class="function">vloada_half3</code> reads a half3 from address (<code class="varname">p</code> + (<code class="varname">offset</code> * 4)) and returns a float3. |
| </p> |
| <p> |
| The address computed as (<code class="varname">p</code> + (<code class="varname">offset</code> * 4)) |
| must be aligned to sizeof (half) * 4 bytes. |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="notes"></a> |
| <h2>Notes</h2> |
| <p> |
| Vector Data Load and Store Functions allow you to read and write vector types |
| from a pointer to memory. |
| </p> |
| <p> |
| The results of vector data load and store functions are undefined if the address being read from |
| or written to is not correctly aligned. The pointer argument <code class="varname">p</code> can be a |
| pointer to <a class="citerefentry" href="global.html"><span class="citerefentry"><span class="refentrytitle">__global</span></span></a>, |
| <a class="citerefentry" href="local.html"><span class="citerefentry"><span class="refentrytitle">__local</span></span></a>, or |
| <a class="citerefentry" href="private.html"><span class="citerefentry"><span class="refentrytitle">__private</span></span></a> memory |
| for store functions. The pointer argument <code class="varname">p</code> can be a pointer to |
| __global, __local, <a class="citerefentry" href="constant.html"><span class="citerefentry"><span class="refentrytitle">__constant</span></span></a> |
| or __private memory for load functions. |
| </p> |
| <p> |
| <code class="function">vload3</code> and <code class="function">vload_half3</code> read <code class="varname">x</code>, <code class="varname">y</code>, <code class="varname">z</code> components from address (<code class="varname">p</code> + (<code class="varname">offset</code> * 3)) into a 3-component vector. vstore3, and <code class="function">vstore_half3</code> write <code class="varname">x</code>, <code class="varname">y</code>, <code class="varname">z</code> components from a 3-component vector to address (<code class="varname">p</code> + (<code class="varname">offset</code> * 3)). |
| </p> |
| <p> |
| In addition <code class="function">vloada_half3</code> reads <code class="varname">x</code>, <code class="varname">y</code>, <code class="varname">z</code> components from address (<code class="varname">p</code> + (<code class="varname">offset</code> * 4)) into a 3- |
| component vector and <code class="function">vstorea_half3</code> writes <code class="varname">x</code>, <code class="varname">y</code>, <code class="varname">z</code> components from a 3-component vector to |
| address (<code class="varname">p</code> + (<code class="varname">offset</code> * 4)). |
| </p> |
| </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-1.1.pdf#page=220" target="OpenCL Spec">OpenCL Specification</a> |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="seealso"></a> |
| <h2>Also see</h2> |
| <p> |
| <a class="citerefentry" href="vectorDataLoadandStoreFunctions.html"><span class="citerefentry"><span class="refentrytitle">Vector Data Load and Store Functions</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 © 2007-2010 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 |
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