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| <title>vload[n]</title> |
| <meta name="generator" content="DocBook XSL Stylesheets V1.79.1" /> |
| <meta name="keywords" content=" vloadn " /> |
| </head> |
| <body> |
| <div class="refentry"> |
| <a id="idm1"></a> |
| <div class="titlepage"></div> |
| <div xmlns="" class="refnamediv"> |
| <a xmlns="http://www.w3.org/1999/xhtml" id="vloadn"></a> |
| <h1>vloadn</h1> |
| <p> |
| Read vectors 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"> |
| gentype<em class="replaceable">n</em> |
| <strong class="fsfunc"> |
| vload<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>const |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="global.html" target="_top">__global</a> gentype |
| <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"> |
| gentype<em class="replaceable">n</em> |
| <strong class="fsfunc"> |
| vload<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>const <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="local.html" target="_top">__local</a> gentype |
| <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"> |
| gentype<em class="replaceable">n</em> |
| <strong class="fsfunc"> |
| vload<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>const <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="constant.html" target="_top">__constant</a> gentype |
| <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"> |
| gentype<em class="replaceable">n</em> |
| <strong class="fsfunc"> |
| vload<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>const <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="private.html" target="_top">__private</a> gentype |
| <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> |
| Return sizeof (<span class="type">gentype<em class="replaceable"><code>n</code></em></span>) bytes of data read from location (<code class="varname">p</code> + (<code class="varname">offset</code> * <code class="varname">n</code>)). |
| </p> |
| <p> |
| </p> |
| <p> |
| The read address computed as (<code class="varname">p</code> + (<code class="varname">offset</code> * <code class="varname">n</code>)) must be 8-bit aligned if <span class="type">gentype</span> is <span class="type">char<em class="replaceable"><code>n</code></em></span>, <span class="type">uchar<em class="replaceable"><code>n</code></em></span>; 16-bit aligned if <span class="type">gentype</span> is <span class="type">short<em class="replaceable"><code>n</code></em></span>, <span class="type">ushort<em class="replaceable"><code>n</code></em></span>; 32-bit aligned if gentype is <span class="type">int<em class="replaceable"><code>n</code></em></span>, <span class="type">uint<em class="replaceable"><code>n</code></em></span>, <span class="type">float<em class="replaceable"><code>n</code></em></span>; 64-bit aligned if <span class="type">gentype</span> is <span class="type">long<em class="replaceable"><code>n</code></em></span>, <span class="type">ulong<em class="replaceable"><code>n</code></em></span>. |
| </p> |
| <p> |
| If the <span class="type">double</span> extension is enabled, then in addition to the above the read address must be 64-bit aligned if <span class="type">gentype</span> is <span class="type">long<em class="replaceable"><code>n</code></em></span>, <span class="type">ulong<em class="replaceable"><code>n</code></em></span>, or <span class="type">double<em class="replaceable"><code>n</code></em></span>. |
| </p> |
| <p> |
| If the <span class="type">half</span> extension is enabled, the read address computed as (<code class="varname">p</code> + (<code class="varname">offset</code> * <code class="varname">n</code>) must be 16-bit aligned. |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="notes"></a> |
| <h2>Notes</h2> |
| <p> |
| The generic type <span class="type">gentype</span> is used to indicate the built-in data types |
| <span class="type">char</span>, <span class="type">uchar</span>, <span class="type">short</span>, <span class="type">ushort</span>, <span class="type">int</span>, <span class="type">uint</span>, <span class="type">long</span>, <span class="type">ulong</span>, or <span class="type">float</span>. |
| </p> |
| <p> |
| The generic type name <span class="type">gentype<em class="replaceable"><code>n</code></em></span> is used to indicate the built-in data types <span class="type">char{2|4|8|16}</span>, |
| <span class="type">uchar{2|4|8|16}</span>, <span class="type">short{2|4|8|16}</span>, <span class="type">ushort{2|4|8|16}</span>, |
| <span class="type">int{2|4|8|16}</span>, <span class="type">uint{2|4|8|16}</span>, <span class="type">long{2|4|8|16}</span>, <span class="type">ulong{2|4|8|16}</span>, or <span class="type">float{2|4|8|16}</span> as the type for the arguments unless otherwise stated. The suffix used in gentype<em class="replaceable"><code>n</code></em> or the function name (i.e. <code class="function">vload<em class="replaceable"><code>n</code></em></code>, <code class="function">vstore<em class="replaceable"><code>n</code></em></code>, etc.) represents the number of elements in the built-in vector type (<em class="replaceable"><code>n</code></em> = 2, 4, 8, or 16). |
| </p> |
| <p> |
| If the <span class="type">double</span> extension is enabled with <a class="citerefentry" href="cl_khr_fp64.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_fp64</span></span></a>, the vector data load (<code class="function">vload<em class="replaceable"><code>n</code></em></code>) and store (<code class="function">vstore<em class="replaceable"><code>n</code></em></code>) functions are extended to include versions that read from or write to double scalar or vector values. The generic type <span class="type">gentype</span> is extended to include double and the generic type <span class="type">gentype<em class="replaceable"><code>n</code></em></span> is extended to include <span class="type">double{2|4|8|16}</span> as arguments and return values. |
| </p> |
| <p> |
| If the <span class="type">half</span> extension is enabled with <a class="citerefentry" href="cl_khr_fp16.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_fp16</span></span></a>, the vector data load (<code class="function">vload<em class="replaceable"><code>n</code></em></code>) and store (<code class="function">vstore<em class="replaceable"><code>n</code></em></code>) functions are extended to include versions that read from or write to half scalar or vector values. The generic type <span class="type">gentype</span> is extended to include <span class="type">half</span> and the generic type <span class="type">gentype<em class="replaceable"><code>n</code></em></span> is extended to include <span class="type">half{2|4|8|16}</span> as arguments and return values. |
| </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-1.0.pdf#page=186" 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 © 2007-2009 The Khronos Group Inc. |
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| distribute, sublicense, and/or sell copies of the Materials, and to |
| permit persons to whom the Materials are furnished to do so, subject to |
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