| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="API documentation for the Rust `std_detect` crate."><meta name="keywords" content="rust, rustlang, rust-lang, std_detect"><title>std_detect - Rust</title><link rel="stylesheet" type="text/css" href="../normalize.css"><link rel="stylesheet" type="text/css" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../dark.css"><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script src="../storage.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="shortcut icon" href="../favicon.ico"><style type="text/css">#crate-search{background-image:url("../down-arrow.svg");}</style></head><body class="rustdoc mod"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../std_detect/index.html'><div class='logo-container'><img src='../rust-logo.png' alt='logo'></div></a><p class='location'>Crate std_detect</p><div class="sidebar-elems"><a id='all-types' href='all.html'><p>See all std_detect's items</p></a><div class="block items"><ul><li><a href="#macros">Macros</a></li></ul></div><p class='location'></p><script>window.sidebarCurrent = {name: 'std_detect', ty: 'mod', relpath: '../'};</script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><a id="settings-menu" href="../settings.html"><img src="../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><span class='out-of-band'><span class='since' title='Stable since Rust version '></span><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>−</span>]</a></span><a class='srclink' href='../src/std_detect/lib.rs.html#1-48' title='goto source code'>[src]</a></span><span class='in-band'>Crate <a class="mod" href=''>std_detect</a></span></h1><div class='stability'><div class='stab unstable'><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>stdsimd</code>)</div></div><div class='docblock'><p>Run-time feature detection for the Rust standard library.</p> |
| <p>To detect whether a feature is enabled in the system running the binary |
| use one of the appropriate macro for the target:</p> |
| <ul> |
| <li><code>x86</code> and <code>x86_64</code>: <a href="../std_detect/macro.is_x86_feature_detected.html" title="`is_x86_feature_detected`"><code>is_x86_feature_detected</code></a></li> |
| <li><code>arm</code>: <a href="../std_detect/macro.is_arm_feature_detected.html" title="`is_arm_feature_detected`"><code>is_arm_feature_detected</code></a></li> |
| <li><code>aarch64</code>: <a href="../std_detect/macro.is_aarch64_feature_detected.html" title="`is_aarch64_feature_detected`"><code>is_aarch64_feature_detected</code></a></li> |
| <li><code>mips</code>: <a href="../std_detect/macro.is_mips_feature_detected.html" title="`is_mips_feature_detected`"><code>is_mips_feature_detected</code></a></li> |
| <li><code>mips64</code>: <a href="../std_detect/macro.is_mips64_feature_detected.html" title="`is_mips64_feature_detected`"><code>is_mips64_feature_detected</code></a></li> |
| <li><code>powerpc</code>: <a href="../std_detect/macro.is_powerpc_feature_detected.html" title="`is_powerpc_feature_detected`"><code>is_powerpc_feature_detected</code></a></li> |
| <li><code>powerpc64</code>: <a href="../std_detect/macro.is_powerpc64_feature_detected.html" title="`is_powerpc64_feature_detected`"><code>is_powerpc64_feature_detected</code></a></li> |
| </ul> |
| </div><h2 id='macros' class='section-header'><a href="#macros">Macros</a></h2> |
| <table><tr class='module-item'><td><a class="macro" href="macro.is_x86_feature_detected.html" title='std_detect::is_x86_feature_detected macro'>is_x86_feature_detected</a></td><td class='docblock-short'><p>A macro to test at <em>runtime</em> whether a CPU feature is available on |
| x86/x86-64 platforms.</p> |
| </td></tr><tr class='unstable module-item'><td><a class="macro" href="macro.is_aarch64_feature_detected.html" title='std_detect::is_aarch64_feature_detected macro'>is_aarch64_feature_detected</a></td><td class='docblock-short'><span class="stab unstable">Experimental</span><p>Prevents compilation if <code>is_aarch64_feature_detected</code> is used somewhere else |
| than <code>aarch64</code> targets.</p> |
| </td></tr><tr class='unstable module-item'><td><a class="macro" href="macro.is_arm_feature_detected.html" title='std_detect::is_arm_feature_detected macro'>is_arm_feature_detected</a></td><td class='docblock-short'><span class="stab unstable">Experimental</span><p>Prevents compilation if <code>is_arm_feature_detected</code> is used somewhere else |
| than <code>ARM</code> targets.</p> |
| </td></tr><tr class='unstable module-item'><td><a class="macro" href="macro.is_mips64_feature_detected.html" title='std_detect::is_mips64_feature_detected macro'>is_mips64_feature_detected</a></td><td class='docblock-short'><span class="stab unstable">Experimental</span><p>Prevents compilation if <code>is_mips64_feature_detected</code> is used somewhere else |
| than <code>MIPS64</code> targets.</p> |
| </td></tr><tr class='unstable module-item'><td><a class="macro" href="macro.is_mips_feature_detected.html" title='std_detect::is_mips_feature_detected macro'>is_mips_feature_detected</a></td><td class='docblock-short'><span class="stab unstable">Experimental</span><p>Prevents compilation if <code>is_mips_feature_detected</code> is used somewhere else |
| than <code>MIPS</code> targets.</p> |
| </td></tr><tr class='unstable module-item'><td><a class="macro" href="macro.is_powerpc64_feature_detected.html" title='std_detect::is_powerpc64_feature_detected macro'>is_powerpc64_feature_detected</a></td><td class='docblock-short'><span class="stab unstable">Experimental</span><p>Prevents compilation if <code>is_powerpc64_feature_detected</code> is used somewhere |
| else than <code>PowerPC64</code> targets.</p> |
| </td></tr><tr class='unstable module-item'><td><a class="macro" href="macro.is_powerpc_feature_detected.html" title='std_detect::is_powerpc_feature_detected macro'>is_powerpc_feature_detected</a></td><td class='docblock-short'><span class="stab unstable">Experimental</span><p>Prevents compilation if <code>is_powerpc_feature_detected</code> is used somewhere else |
| than <code>PowerPC</code> targets.</p> |
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