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<!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="Source to the Rust file `crates/std_detect/src/detect/arch/aarch64.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>aarch64.rs.html -- source</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 source"><!--[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">&#9776;</div><a href='../../../../std_detect/index.html'><div class='logo-container'><img src='../../../../rust-logo.png' alt='logo'></div></a></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"><pre class="line-numbers"><span id="1"> 1</span>
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</pre><div class="example-wrap"><pre class="rust ">
<span class="doccomment">//! Aarch64 run-time features.</span>
<span class="doccomment">/// Checks if `aarch64` feature is enabled.</span>
<span class="attribute">#[<span class="ident">macro_export</span>]</span>
<span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">&quot;stdsimd&quot;</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">&quot;27731&quot;</span>)]</span>
<span class="attribute">#[<span class="ident">allow_internal_unstable</span>(<span class="ident">stdsimd_internal</span>,<span class="ident">stdsimd</span>)]</span>
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">is_aarch64_feature_detected</span> {
(<span class="string">&quot;neon&quot;</span>) <span class="op">=&gt;</span> {
<span class="comment">// FIXME: this should be removed once we rename Aarch64 neon to asimd</span>
<span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">&quot;neon&quot;</span>) <span class="op">||</span>
<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">detect</span>::<span class="ident">check_for</span>(<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">detect</span>::<span class="ident">Feature</span>::<span class="ident">asimd</span>)
};
(<span class="string">&quot;asimd&quot;</span>) <span class="op">=&gt;</span> {
<span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">&quot;neon&quot;</span>) <span class="op">||</span>
<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">detect</span>::<span class="ident">check_for</span>(<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">detect</span>::<span class="ident">Feature</span>::<span class="ident">asimd</span>)
};
(<span class="string">&quot;pmull&quot;</span>) <span class="op">=&gt;</span> {
<span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">&quot;pmull&quot;</span>) <span class="op">||</span>
<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">detect</span>::<span class="ident">check_for</span>(<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">detect</span>::<span class="ident">Feature</span>::<span class="ident">pmull</span>)
};
(<span class="string">&quot;fp&quot;</span>) <span class="op">=&gt;</span> {
<span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">&quot;fp&quot;</span>) <span class="op">||</span>
<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">detect</span>::<span class="ident">check_for</span>(<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">detect</span>::<span class="ident">Feature</span>::<span class="ident">fp</span>)
};
(<span class="string">&quot;fp16&quot;</span>) <span class="op">=&gt;</span> {
<span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">&quot;fp16&quot;</span>) <span class="op">||</span>
<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">detect</span>::<span class="ident">check_for</span>(<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">detect</span>::<span class="ident">Feature</span>::<span class="ident">fp16</span>)
};
(<span class="string">&quot;sve&quot;</span>) <span class="op">=&gt;</span> {
<span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">&quot;sve&quot;</span>) <span class="op">||</span>
<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">detect</span>::<span class="ident">check_for</span>(<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">detect</span>::<span class="ident">Feature</span>::<span class="ident">sve</span>)
};
(<span class="string">&quot;crc&quot;</span>) <span class="op">=&gt;</span> {
<span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">&quot;crc&quot;</span>) <span class="op">||</span>
<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">detect</span>::<span class="ident">check_for</span>(<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">detect</span>::<span class="ident">Feature</span>::<span class="ident">crc</span>)
};
(<span class="string">&quot;crypto&quot;</span>) <span class="op">=&gt;</span> {
<span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">&quot;crypto&quot;</span>) <span class="op">||</span>
<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">detect</span>::<span class="ident">check_for</span>(<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">detect</span>::<span class="ident">Feature</span>::<span class="ident">crypto</span>)
};
(<span class="string">&quot;lse&quot;</span>) <span class="op">=&gt;</span> {
<span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">&quot;lse&quot;</span>) <span class="op">||</span>
<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">detect</span>::<span class="ident">check_for</span>(<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">detect</span>::<span class="ident">Feature</span>::<span class="ident">lse</span>)
};
(<span class="string">&quot;rdm&quot;</span>) <span class="op">=&gt;</span> {
<span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">&quot;rdm&quot;</span>) <span class="op">||</span>
<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">detect</span>::<span class="ident">check_for</span>(<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">detect</span>::<span class="ident">Feature</span>::<span class="ident">rdm</span>)
};
(<span class="string">&quot;rcpc&quot;</span>) <span class="op">=&gt;</span> {
<span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">&quot;rcpc&quot;</span>) <span class="op">||</span>
<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">detect</span>::<span class="ident">check_for</span>(<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">detect</span>::<span class="ident">Feature</span>::<span class="ident">rcpc</span>)
};
(<span class="string">&quot;dotprod&quot;</span>) <span class="op">=&gt;</span> {
<span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">&quot;dotprod&quot;</span>) <span class="op">||</span>
<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">detect</span>::<span class="ident">check_for</span>(<span class="macro-nonterminal">$</span><span class="kw">crate</span>::<span class="macro-nonterminal">detect</span>::<span class="ident">Feature</span>::<span class="ident">dotprod</span>)
};
(<span class="string">&quot;ras&quot;</span>) <span class="op">=&gt;</span> {
<span class="macro">compile_error</span><span class="macro">!</span>(<span class="string">&quot;\&quot;ras\&quot; feature cannot be detected at run-time&quot;</span>)
};
(<span class="string">&quot;v8.1a&quot;</span>) <span class="op">=&gt;</span> {
<span class="macro">compile_error</span><span class="macro">!</span>(<span class="string">&quot;\&quot;v8.1a\&quot; feature cannot be detected at run-time&quot;</span>)
};
(<span class="string">&quot;v8.2a&quot;</span>) <span class="op">=&gt;</span> {
<span class="macro">compile_error</span><span class="macro">!</span>(<span class="string">&quot;\&quot;v8.2a\&quot; feature cannot be detected at run-time&quot;</span>)
};
(<span class="string">&quot;v8.3a&quot;</span>) <span class="op">=&gt;</span> {
<span class="macro">compile_error</span><span class="macro">!</span>(<span class="string">&quot;\&quot;v8.3a\&quot; feature cannot be detected at run-time&quot;</span>)
};
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>:<span class="ident">tt</span>,) <span class="op">=&gt;</span> {
<span class="macro">is_aarch64_feature_detected</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>);
};
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>:<span class="ident">tt</span>) <span class="op">=&gt;</span> { <span class="macro">compile_error</span><span class="macro">!</span>(<span class="macro">concat</span><span class="macro">!</span>(<span class="string">&quot;unknown aarch64 target feature: &quot;</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>)) };
}
<span class="doccomment">/// ARM Aarch64 CPU Feature enum. Each variant denotes a position in a bitset</span>
<span class="doccomment">/// for a particular feature.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// PLEASE: do not use this, it is an implementation detail subject to change.</span>
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="attribute">#[<span class="ident">allow</span>(<span class="ident">non_camel_case_types</span>)]</span>
<span class="attribute">#[<span class="ident">repr</span>(<span class="ident">u8</span>)]</span>
<span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">&quot;stdsimd_internal&quot;</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">&quot;0&quot;</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">Feature</span> {
<span class="doccomment">/// ARM Advanced SIMD (ASIMD)</span>
<span class="ident">asimd</span>,
<span class="doccomment">/// Polynomial Multiply</span>
<span class="ident">pmull</span>,
<span class="doccomment">/// Floating point support</span>
<span class="ident">fp</span>,
<span class="doccomment">/// Half-float support.</span>
<span class="ident">fp16</span>,
<span class="doccomment">/// Scalable Vector Extension (SVE)</span>
<span class="ident">sve</span>,
<span class="doccomment">/// CRC32 (Cyclic Redundancy Check)</span>
<span class="ident">crc</span>,
<span class="doccomment">/// Crypto: AES + PMULL + SHA1 + SHA2</span>
<span class="ident">crypto</span>,
<span class="doccomment">/// Atomics (Large System Extension)</span>
<span class="ident">lse</span>,
<span class="doccomment">/// Rounding Double Multiply (ASIMDRDM)</span>
<span class="ident">rdm</span>,
<span class="doccomment">/// Release consistent Processor consistent (RcPc)</span>
<span class="ident">rcpc</span>,
<span class="doccomment">/// Vector Dot-Product (ASIMDDP)</span>
<span class="ident">dotprod</span>,
}
</pre></div>
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