<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" lang="en-us" xml:lang="en-us"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"></meta> <meta http-equiv="X-UA-Compatible" content="IE=edge"></meta> <meta name="copyright" content="(C) Copyright 2005"></meta> <meta name="DC.rights.owner" content="(C) Copyright 2005"></meta> <meta name="DC.Type" content="cppModule"></meta> <meta name="DC.Title" content="Half Precision Intrinsics"></meta> <meta name="abstract" content=""></meta> <meta name="description" content=""></meta> <meta name="DC.Format" content="XHTML"></meta> <meta name="DC.Identifier" content="group__CUDA__MATH__INTRINSIC__HALF"></meta> <link rel="stylesheet" type="text/css" href="../common/formatting/commonltr.css"></link> <link rel="stylesheet" type="text/css" href="../common/formatting/site.css"></link> <title>CUDA Math API :: CUDA Toolkit Documentation</title> <!--[if lt IE 9]> <script src="../common/formatting/html5shiv-printshiv.min.js"></script> <![endif]--> <script type="text/javascript" charset="utf-8" src="//assets.adobedtm.com/b92787824f2e0e9b68dc2e993f9bd995339fe417/satelliteLib-7ba51e58dc61bcb0e9311aadd02a0108ab24cc6c.js"></script> <script type="text/javascript" charset="utf-8" src="../common/formatting/jquery.min.js"></script> <script type="text/javascript" charset="utf-8" src="../common/formatting/jquery.ba-hashchange.min.js"></script> <script type="text/javascript" charset="utf-8" src="../common/formatting/jquery.scrollintoview.min.js"></script> <script type="text/javascript" src="../search/htmlFileList.js"></script> <script type="text/javascript" src="../search/htmlFileInfoList.js"></script> <script type="text/javascript" src="../search/nwSearchFnt.min.js"></script> <script type="text/javascript" src="../search/stemmers/en_stemmer.min.js"></script> <script type="text/javascript" src="../search/index-1.js"></script> <script type="text/javascript" src="../search/index-2.js"></script> <script type="text/javascript" src="../search/index-3.js"></script> <link rel="canonical" href="http://docs.nvidia.com/cuda/cuda-math-api/index.html"></link> <link rel="stylesheet" type="text/css" href="../common/formatting/qwcode.highlight.css"></link> </head> <body> <header id="header"><span id="company">NVIDIA</span><span id="site-title">CUDA Toolkit Documentation</span><form id="search" method="get" action="search"> <input type="text" name="search-text"></input><fieldset id="search-location"> <legend>Search In:</legend> <label><input type="radio" name="search-type" value="site"></input>Entire Site</label> <label><input type="radio" name="search-type" value="document"></input>Just This Document</label></fieldset> <button type="reset">clear search</button> <button id="submit" type="submit">search</button></form> </header> <div id="site-content"> <nav id="site-nav"> <div class="category closed"><a href="../index.html" title="The root of the site.">CUDA Toolkit v10.1.168</a></div> <div class="category"><a href="index.html" title="CUDA Math API">CUDA Math API</a></div> <ul> <li> <div class="section-link"><a href="modules.html#modules">1. Modules</a></div> <ul> <li> <div class="section-link"><a href="group__CUDA__MATH__INTRINSIC__HALF.html#group__CUDA__MATH__INTRINSIC__HALF">1.1. Half Precision Intrinsics</a></div> <ul> <li> <div class="section-link"><a href="group__CUDA__MATH____HALF__ARITHMETIC.html#group__CUDA__MATH____HALF__ARITHMETIC">1.1.1. Half Arithmetic Functions</a></div> </li> <li> <div class="section-link"><a href="group__CUDA__MATH____HALF2__ARITHMETIC.html#group__CUDA__MATH____HALF2__ARITHMETIC">1.1.2. Half2 Arithmetic Functions</a></div> </li> <li> <div class="section-link"><a href="group__CUDA__MATH____HALF__COMPARISON.html#group__CUDA__MATH____HALF__COMPARISON">1.1.3. Half Comparison Functions</a></div> </li> <li> <div class="section-link"><a href="group__CUDA__MATH____HALF2__COMPARISON.html#group__CUDA__MATH____HALF2__COMPARISON">1.1.4. Half2 Comparison Functions</a></div> </li> <li> <div class="section-link"><a href="group__CUDA__MATH____HALF__MISC.html#group__CUDA__MATH____HALF__MISC">1.1.5. Half Precision Conversion And Data Movement</a></div> </li> <li> <div class="section-link"><a href="group__CUDA__MATH____HALF__FUNCTIONS.html#group__CUDA__MATH____HALF__FUNCTIONS">1.1.6. Half Math Functions</a></div> </li> <li> <div class="section-link"><a href="group__CUDA__MATH____HALF2__FUNCTIONS.html#group__CUDA__MATH____HALF2__FUNCTIONS">1.1.7. Half2 Math Functions</a></div> </li> </ul> </li> <li> <div class="section-link"><a href="group__CUDA__MATH.html#group__CUDA__MATH">1.2. Mathematical Functions</a></div> </li> <li> <div class="section-link"><a href="group__CUDA__MATH__SINGLE.html#group__CUDA__MATH__SINGLE">1.3. Single Precision Mathematical Functions</a></div> </li> <li> <div class="section-link"><a href="group__CUDA__MATH__DOUBLE.html#group__CUDA__MATH__DOUBLE">1.4. Double Precision Mathematical Functions</a></div> </li> <li> <div class="section-link"><a href="group__CUDA__MATH__INTRINSIC__SINGLE.html#group__CUDA__MATH__INTRINSIC__SINGLE">1.5. Single Precision Intrinsics</a></div> </li> <li> <div class="section-link"><a href="group__CUDA__MATH__INTRINSIC__DOUBLE.html#group__CUDA__MATH__INTRINSIC__DOUBLE">1.6. Double Precision Intrinsics</a></div> </li> <li> <div class="section-link"><a href="group__CUDA__MATH__INTRINSIC__INT.html#group__CUDA__MATH__INTRINSIC__INT">1.7. Integer Intrinsics</a></div> </li> <li> <div class="section-link"><a href="group__CUDA__MATH__INTRINSIC__CAST.html#group__CUDA__MATH__INTRINSIC__CAST">1.8. Type Casting Intrinsics</a></div> </li> <li> <div class="section-link"><a href="group__CUDA__MATH__INTRINSIC__SIMD.html#group__CUDA__MATH__INTRINSIC__SIMD">1.9. SIMD Intrinsics</a></div> </li> </ul> </li> <li> <div class="section-link"><a href="notices-header.html#notices-header">Notices</a></div> <ul></ul> </li> </ul> </nav> <div id="resize-nav"></div> <nav id="search-results"> <h2>Search Results</h2> <ol></ol> </nav> <div id="contents-container"> <div id="breadcrumbs-container"> <div id="breadcrumbs"><a href="modules.html" shape="rect">< Previous</a> | <a href="group__CUDA__MATH____HALF__ARITHMETIC.html" shape="rect">Next ></a></div> <div id="release-info">CUDA Math API (<a href="../../pdf/CUDA_Math_API.pdf">PDF</a>) - v10.1.168 (<a href="https://developer.nvidia.com/cuda-toolkit-archive">older</a>) - Last updated April 24, 2019 - <a href="mailto:CUDAIssues@nvidia.com?subject=CUDA Toolkit Documentation Feedback: CUDA Math API">Send Feedback</a></div> </div> <article id="contents"> <div class="topic reference apiRef apiPackage cppModule" id="group__CUDA__MATH__INTRINSIC__HALF"><a name="group__CUDA__MATH__INTRINSIC__HALF" shape="rect"> <!-- --></a><h2 class="topictitle2 cppModule">1.1. Half Precision Intrinsics</h2> <div class="section"> <p>This section describes half precision intrinsic functions that are only supported in device code. To use these functions include the header file <tt class="ph tt code">cuda_fp16.h</tt> in your program. </p> </div> <h3 class="fake_sectiontitle member_header">Modules</h3> <dl class="members"> <dt><span class="member_type"> </span><span class="member_name"> <div><a class="link" href="group__CUDA__MATH____HALF__ARITHMETIC.html#group__CUDA__MATH____HALF__ARITHMETIC" shape="rect">Half Arithmetic Functions</a></div></span></dt> <dd class="shortdesc"><span></span><span class="desc"></span><a href="group__CUDA__MATH____HALF__ARITHMETIC.html#group__CUDA__MATH____HALF__ARITHMETIC" class="link" title="" shape="rect"></a></dd> <dt><span class="member_type"> </span><span class="member_name"> <div><a class="link" href="group__CUDA__MATH____HALF__COMPARISON.html#group__CUDA__MATH____HALF__COMPARISON" shape="rect">Half Comparison Functions</a></div></span></dt> <dd class="shortdesc"><span></span><span class="desc"></span><a href="group__CUDA__MATH____HALF__COMPARISON.html#group__CUDA__MATH____HALF__COMPARISON" class="link" title="" shape="rect"></a></dd> <dt><span class="member_type"> </span><span class="member_name"> <div><a class="link" href="group__CUDA__MATH____HALF__FUNCTIONS.html#group__CUDA__MATH____HALF__FUNCTIONS" shape="rect">Half Math Functions</a></div></span></dt> <dd class="shortdesc"><span></span><span class="desc"></span><a href="group__CUDA__MATH____HALF__FUNCTIONS.html#group__CUDA__MATH____HALF__FUNCTIONS" class="link" title="" shape="rect"></a></dd> <dt><span class="member_type"> </span><span class="member_name"> <div><a class="link" href="group__CUDA__MATH____HALF__MISC.html#group__CUDA__MATH____HALF__MISC" shape="rect">Half Precision Conversion And Data Movement</a></div></span></dt> <dd class="shortdesc"><span></span><span class="desc"></span><a href="group__CUDA__MATH____HALF__MISC.html#group__CUDA__MATH____HALF__MISC" class="link" title="" shape="rect"></a></dd> <dt><span class="member_type"> </span><span class="member_name"> <div><a class="link" href="group__CUDA__MATH____HALF2__ARITHMETIC.html#group__CUDA__MATH____HALF2__ARITHMETIC" shape="rect">Half2 Arithmetic Functions</a></div></span></dt> <dd class="shortdesc"><span></span><span class="desc"></span><a href="group__CUDA__MATH____HALF2__ARITHMETIC.html#group__CUDA__MATH____HALF2__ARITHMETIC" class="link" title="" shape="rect"></a></dd> <dt><span class="member_type"> </span><span class="member_name"> <div><a class="link" href="group__CUDA__MATH____HALF2__COMPARISON.html#group__CUDA__MATH____HALF2__COMPARISON" shape="rect">Half2 Comparison Functions</a></div></span></dt> <dd class="shortdesc"><span></span><span class="desc"></span><a href="group__CUDA__MATH____HALF2__COMPARISON.html#group__CUDA__MATH____HALF2__COMPARISON" class="link" title="" shape="rect"></a></dd> <dt><span class="member_type"> </span><span class="member_name"> <div><a class="link" href="group__CUDA__MATH____HALF2__FUNCTIONS.html#group__CUDA__MATH____HALF2__FUNCTIONS" shape="rect">Half2 Math Functions</a></div></span></dt> <dd class="shortdesc"><span></span><span class="desc"></span><a href="group__CUDA__MATH____HALF2__FUNCTIONS.html#group__CUDA__MATH____HALF2__FUNCTIONS" class="link" title="" shape="rect"></a></dd> </dl> <div class="topic reference apiRef apiPackage cppModule" id="inner_elem__group__CUDA__MATH____HALF__ARITHMETIC"><a name="inner_elem__group__CUDA__MATH____HALF__ARITHMETIC" shape="rect"> <!-- --></a><h3 class="topictitle3 cppModule">Half Arithmetic Functions</h3> <div class="section"> <p></p> </div> </div> <div class="topic reference apiRef apiPackage cppModule" id="inner_elem__group__CUDA__MATH____HALF2__ARITHMETIC"><a name="inner_elem__group__CUDA__MATH____HALF2__ARITHMETIC" shape="rect"> <!-- --></a><h3 class="topictitle3 cppModule">Half2 Arithmetic Functions</h3> <div class="section"> <p></p> </div> </div> <div class="topic reference apiRef apiPackage cppModule" id="inner_elem__group__CUDA__MATH____HALF__COMPARISON"><a name="inner_elem__group__CUDA__MATH____HALF__COMPARISON" shape="rect"> <!-- --></a><h3 class="topictitle3 cppModule">Half Comparison Functions</h3> <div class="section"> <p></p> </div> </div> <div class="topic reference apiRef apiPackage cppModule" id="inner_elem__group__CUDA__MATH____HALF2__COMPARISON"><a name="inner_elem__group__CUDA__MATH____HALF2__COMPARISON" shape="rect"> <!-- --></a><h3 class="topictitle3 cppModule">Half2 Comparison Functions</h3> <div class="section"> <p></p> </div> </div> <div class="topic reference apiRef apiPackage cppModule" id="inner_elem__group__CUDA__MATH____HALF__MISC"><a name="inner_elem__group__CUDA__MATH____HALF__MISC" shape="rect"> <!-- --></a><h3 class="topictitle3 cppModule">Half Precision Conversion And Data Movement</h3> <div class="section"> <p></p> </div> </div> <div class="topic reference apiRef apiPackage cppModule" id="inner_elem__group__CUDA__MATH____HALF__FUNCTIONS"><a name="inner_elem__group__CUDA__MATH____HALF__FUNCTIONS" shape="rect"> <!-- --></a><h3 class="topictitle3 cppModule">Half Math Functions</h3> <div class="section"> <p></p> </div> </div> <div class="topic reference apiRef apiPackage cppModule" id="inner_elem__group__CUDA__MATH____HALF2__FUNCTIONS"><a name="inner_elem__group__CUDA__MATH____HALF2__FUNCTIONS" shape="rect"> <!-- --></a><h3 class="topictitle3 cppModule">Half2 Math Functions</h3> <div class="section"> <p></p> </div> </div> </div> <hr id="contents-end"></hr> </article> </div> </div> <script language="JavaScript" type="text/javascript" charset="utf-8" src="../common/formatting/common.min.js"></script> <script language="JavaScript" type="text/javascript" charset="utf-8" src="../common/scripts/google-analytics/google-analytics-write.js"></script> <script language="JavaScript" type="text/javascript" charset="utf-8" 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