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| <title>vload_half</title> |
| <meta name="generator" content="DocBook XSL Stylesheets V1.79.1" /> |
| <meta name="keywords" content="vload_half" /> |
| </head> |
| <body> |
| <div class="refentry"> |
| <a id="id-1"></a> |
| <div class="titlepage"></div> |
| <div xmlns="" class="refnamediv"> |
| <a xmlns="http://www.w3.org/1999/xhtml" id="vload_half"></a> |
| <h1>vload_half</h1> |
| <p> |
| Read a half float 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="scalarDataTypes.html" target="pagedisplay">float</a> |
| <strong class="fsfunc"> |
| vload_half |
| </strong> |
| (</code> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">offset</var>, </td> |
| </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td>const <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">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="scalarDataTypes.html" target="pagedisplay">float</a> |
| <strong class="fsfunc"> |
| vload_half |
| </strong> |
| (</code> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">offset</var>, </td> |
| </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td>const constant <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">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> |
| Read sizeof(<span class="type">half</span>) bytes of data from address (<code class="varname">p</code> + |
| <code class="varname">offset</code>). The data read is interpreted as a half value. |
| </p> |
| <p> |
| The half value is converted to a float value and the float value is returned. The |
| read address computed as (<code class="varname">p</code> + <code class="varname">offset</code>) must be |
| 16-bit aligned. |
| </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 suffix <code class="varname">n</code> in the function names |
| (i.e. vload<code class="varname">n</code>, vstore<code class="varname">n</code> etc.) |
| represent <code class="varname">n</code>-element |
| vectors, where <code class="varname">n</code> = 2, 3, 4, 8 or 16. |
| </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, |
| constant or private memory for load functions. |
| </p> |
| <p> |
| NOTE: The vector data load and store functions |
| variants that take pointer arguments which |
| point to the generic address space are also supported. |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="specification"></a> |
| <h2>Specification</h2> |
| <p> |
| <img src="pdficon_small1.gif" /> |
| |
| <a href="https://www.khronos.org/registry/cl/specs/opencl-2.0-openclc.pdf#namedest=vectorDataLoadandStoreFunctions" 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 © 2007-2015 The Khronos Group Inc. |
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