| <!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/x86.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>x86.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">☰</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">//! This module implements minimal run-time feature detection for x86.</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! The features are detected using the `detect_features` function below.</span> |
| <span class="doccomment">//! This function uses the CPUID instruction to read the feature flags from the</span> |
| <span class="doccomment">//! CPU and encodes them in an `usize` where each bit position represents</span> |
| <span class="doccomment">//! whether a feature is available (bit is set) or unavaiable (bit is cleared).</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! The enum `Feature` is used to map bit positions to feature names, and the</span> |
| <span class="doccomment">//! the `__crate::detect::check_for!` macro is used to map string literals (e.g.,</span> |
| <span class="doccomment">//! "avx") to these bit positions (e.g., `Feature::avx`).</span> |
| <span class="doccomment">//!</span> |
| <span class="doccomment">//! The run-time feature detection is performed by the</span> |
| <span class="doccomment">//! `__crate::detect::check_for(Feature) -> bool` function. On its first call,</span> |
| <span class="doccomment">//! this functions queries the CPU for the available features and stores them</span> |
| <span class="doccomment">//! in a global `AtomicUsize` variable. The query is performed by just checking</span> |
| <span class="doccomment">//! whether the feature bit in this global variable is set or cleared.</span> |
| |
| <span class="doccomment">/// A macro to test at *runtime* whether a CPU feature is available on</span> |
| <span class="doccomment">/// x86/x86-64 platforms.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// This macro is provided in the standard library and will detect at runtime</span> |
| <span class="doccomment">/// whether the specified CPU feature is detected. This does **not** resolve at</span> |
| <span class="doccomment">/// compile time unless the specified feature is already enabled for the entire</span> |
| <span class="doccomment">/// crate. Runtime detection currently relies mostly on the `cpuid` instruction.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// This macro only takes one argument which is a string literal of the feature</span> |
| <span class="doccomment">/// being tested for. The feature names supported are the lowercase versions of</span> |
| <span class="doccomment">/// the ones defined by Intel in [their documentation][docs].</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// ## Supported arguments</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// This macro supports the same names that `#[target_feature]` supports. Unlike</span> |
| <span class="doccomment">/// `#[target_feature]`, however, this macro does not support names separated</span> |
| <span class="doccomment">/// with a comma. Instead testing for multiple features must be done through</span> |
| <span class="doccomment">/// separate macro invocations for now.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// Supported arguments are:</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// * `"aes"`</span> |
| <span class="doccomment">/// * `"pclmulqdq"`</span> |
| <span class="doccomment">/// * `"rdrand"`</span> |
| <span class="doccomment">/// * `"rdseed"`</span> |
| <span class="doccomment">/// * `"tsc"`</span> |
| <span class="doccomment">/// * `"mmx"`</span> |
| <span class="doccomment">/// * `"sse"`</span> |
| <span class="doccomment">/// * `"sse2"`</span> |
| <span class="doccomment">/// * `"sse3"`</span> |
| <span class="doccomment">/// * `"ssse3"`</span> |
| <span class="doccomment">/// * `"sse4.1"`</span> |
| <span class="doccomment">/// * `"sse4.2"`</span> |
| <span class="doccomment">/// * `"sse4a"`</span> |
| <span class="doccomment">/// * `"sha"`</span> |
| <span class="doccomment">/// * `"avx"`</span> |
| <span class="doccomment">/// * `"avx2"`</span> |
| <span class="doccomment">/// * `"avx512f"`</span> |
| <span class="doccomment">/// * `"avx512cd"`</span> |
| <span class="doccomment">/// * `"avx512er"`</span> |
| <span class="doccomment">/// * `"avx512pf"`</span> |
| <span class="doccomment">/// * `"avx512bw"`</span> |
| <span class="doccomment">/// * `"avx512dq"`</span> |
| <span class="doccomment">/// * `"avx512vl"`</span> |
| <span class="doccomment">/// * `"avx512ifma"`</span> |
| <span class="doccomment">/// * `"avx512vbmi"`</span> |
| <span class="doccomment">/// * `"avx512vpopcntdq"`</span> |
| <span class="doccomment">/// * `"f16c"`</span> |
| <span class="doccomment">/// * `"fma"`</span> |
| <span class="doccomment">/// * `"bmi1"`</span> |
| <span class="doccomment">/// * `"bmi2"`</span> |
| <span class="doccomment">/// * `"abm"`</span> |
| <span class="doccomment">/// * `"lzcnt"`</span> |
| <span class="doccomment">/// * `"tbm"`</span> |
| <span class="doccomment">/// * `"popcnt"`</span> |
| <span class="doccomment">/// * `"fxsr"`</span> |
| <span class="doccomment">/// * `"xsave"`</span> |
| <span class="doccomment">/// * `"xsaveopt"`</span> |
| <span class="doccomment">/// * `"xsaves"`</span> |
| <span class="doccomment">/// * `"xsavec"`</span> |
| <span class="doccomment">/// * `"adx"`</span> |
| <span class="doccomment">/// * `"rtm"`</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// [docs]: https://software.intel.com/sites/landingpage/IntrinsicsGuide</span> |
| <span class="attribute">#[<span class="ident">macro_export</span>]</span> |
| <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"simd_x86"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.27.0"</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_x86_feature_detected</span> { |
| (<span class="string">"aes"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"aes"</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">aes</span>) }; |
| (<span class="string">"pclmulqdq"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"pclmulqdq"</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">pclmulqdq</span>) }; |
| (<span class="string">"rdrand"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"rdrand"</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">rdrand</span>) }; |
| (<span class="string">"rdseed"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"rdseed"</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">rdseed</span>) }; |
| (<span class="string">"tsc"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"tsc"</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">tsc</span>) }; |
| (<span class="string">"mmx"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"mmx"</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">mmx</span>) }; |
| (<span class="string">"sse"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"sse"</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">sse</span>) }; |
| (<span class="string">"sse2"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"sse2"</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">sse2</span>) |
| }; |
| (<span class="string">"sse3"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"sse3"</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">sse3</span>) |
| }; |
| (<span class="string">"ssse3"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"ssse3"</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">ssse3</span>) |
| }; |
| (<span class="string">"sse4.1"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"sse4.1"</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">sse4_1</span>) |
| }; |
| (<span class="string">"sse4.2"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"sse4.2"</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">sse4_2</span>) |
| }; |
| (<span class="string">"sse4a"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"sse4a"</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">sse4a</span>) |
| }; |
| (<span class="string">"sha"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"sha"</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">sha</span>) |
| }; |
| (<span class="string">"avx"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"avx"</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">avx</span>) |
| }; |
| (<span class="string">"avx2"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"avx2"</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">avx2</span>) |
| }; |
| (<span class="string">"avx512f"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"avx512f"</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">avx512f</span>) |
| }; |
| (<span class="string">"avx512cd"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"avx512cd"</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">avx512cd</span>) |
| }; |
| (<span class="string">"avx512er"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"avx512er"</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">avx512er</span>) |
| }; |
| (<span class="string">"avx512pf"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"avx512pf"</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">avx512pf</span>) |
| }; |
| (<span class="string">"avx512bw"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"avx512bw"</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">avx512bw</span>) |
| }; |
| (<span class="string">"avx512dq"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"avx512dq"</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">avx512dq</span>) |
| }; |
| (<span class="string">"avx512vl"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_Feature</span> <span class="op">=</span> <span class="string">"avx512vl"</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">avx512vl</span>) |
| }; |
| (<span class="string">"avx512ifma"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"avx512ifma"</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">avx512_ifma</span>) |
| }; |
| (<span class="string">"avx512vbmi"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"avx512vbmi"</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">avx512_vbmi</span>) |
| }; |
| (<span class="string">"avx512vpopcntdq"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"avx512vpopcntdq"</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">avx512_vpopcntdq</span>) |
| }; |
| (<span class="string">"f16c"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"f16c"</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">f16c</span>) |
| }; |
| (<span class="string">"fma"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"fma"</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">fma</span>) |
| }; |
| (<span class="string">"bmi1"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"bmi1"</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">bmi</span>) |
| }; |
| (<span class="string">"bmi2"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"bmi2"</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">bmi2</span>) |
| }; |
| (<span class="string">"abm"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"abm"</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">abm</span>) |
| }; |
| (<span class="string">"lzcnt"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"lzcnt"</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">abm</span>) |
| }; |
| (<span class="string">"tbm"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"tbm"</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">tbm</span>) |
| }; |
| (<span class="string">"popcnt"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"popcnt"</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">popcnt</span>) |
| }; |
| (<span class="string">"fxsr"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"fxsr"</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">fxsr</span>) |
| }; |
| (<span class="string">"xsave"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"xsave"</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">xsave</span>) |
| }; |
| (<span class="string">"xsaveopt"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"xsaveopt"</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">xsaveopt</span>) |
| }; |
| (<span class="string">"xsaves"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"xsaves"</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">xsaves</span>) |
| }; |
| (<span class="string">"xsavec"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"xsavec"</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">xsavec</span>) |
| }; |
| (<span class="string">"cmpxchg16b"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"cmpxchg16b"</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">cmpxchg16b</span>) |
| }; |
| (<span class="string">"adx"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"adx"</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">adx</span>) |
| }; |
| (<span class="string">"rtm"</span>) <span class="op">=></span> { |
| <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_feature</span> <span class="op">=</span> <span class="string">"rtm"</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">rtm</span>) |
| }; |
| (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>:<span class="ident">tt</span>,) <span class="op">=></span> { |
| <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>); |
| }; |
| (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>:<span class="ident">tt</span>) <span class="op">=></span> { |
| <span class="macro">compile_error</span><span class="macro">!</span>(<span class="macro">concat</span><span class="macro">!</span>(<span class="string">"unknown target feature: "</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">t</span>)) |
| }; |
| } |
| |
| <span class="doccomment">/// X86 CPU Feature enum. Each variant denotes a position in a bitset for a</span> |
| <span class="doccomment">/// particular feature.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// This is an unstable implementation detail subject to change.</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">doc</span>(<span class="ident">hidden</span>)]</span> |
| <span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"stdsimd_internal"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"0"</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">Feature</span> { |
| <span class="doccomment">/// AES (Advanced Encryption Standard New Instructions AES-NI)</span> |
| <span class="ident">aes</span>, |
| <span class="doccomment">/// CLMUL (Carry-less Multiplication)</span> |
| <span class="ident">pclmulqdq</span>, |
| <span class="doccomment">/// RDRAND</span> |
| <span class="ident">rdrand</span>, |
| <span class="doccomment">/// RDSEED</span> |
| <span class="ident">rdseed</span>, |
| <span class="doccomment">/// TSC (Time Stamp Counter)</span> |
| <span class="ident">tsc</span>, |
| <span class="doccomment">/// MMX</span> |
| <span class="ident">mmx</span>, |
| <span class="doccomment">/// SSE (Streaming SIMD Extensions)</span> |
| <span class="ident">sse</span>, |
| <span class="doccomment">/// SSE2 (Streaming SIMD Extensions 2)</span> |
| <span class="ident">sse2</span>, |
| <span class="doccomment">/// SSE3 (Streaming SIMD Extensions 3)</span> |
| <span class="ident">sse3</span>, |
| <span class="doccomment">/// SSSE3 (Supplemental Streaming SIMD Extensions 3)</span> |
| <span class="ident">ssse3</span>, |
| <span class="doccomment">/// SSE4.1 (Streaming SIMD Extensions 4.1)</span> |
| <span class="ident">sse4_1</span>, |
| <span class="doccomment">/// SSE4.2 (Streaming SIMD Extensions 4.2)</span> |
| <span class="ident">sse4_2</span>, |
| <span class="doccomment">/// SSE4a (Streaming SIMD Extensions 4a)</span> |
| <span class="ident">sse4a</span>, |
| <span class="doccomment">/// SHA</span> |
| <span class="ident">sha</span>, |
| <span class="doccomment">/// AVX (Advanced Vector Extensions)</span> |
| <span class="ident">avx</span>, |
| <span class="doccomment">/// AVX2 (Advanced Vector Extensions 2)</span> |
| <span class="ident">avx2</span>, |
| <span class="doccomment">/// AVX-512 F (Foundation)</span> |
| <span class="ident">avx512f</span>, |
| <span class="doccomment">/// AVX-512 CD (Conflict Detection Instructions)</span> |
| <span class="ident">avx512cd</span>, |
| <span class="doccomment">/// AVX-512 ER (Exponential and Reciprocal Instructions)</span> |
| <span class="ident">avx512er</span>, |
| <span class="doccomment">/// AVX-512 PF (Prefetch Instructions)</span> |
| <span class="ident">avx512pf</span>, |
| <span class="doccomment">/// AVX-512 BW (Byte and Word Instructions)</span> |
| <span class="ident">avx512bw</span>, |
| <span class="doccomment">/// AVX-512 DQ (Doubleword and Quadword)</span> |
| <span class="ident">avx512dq</span>, |
| <span class="doccomment">/// AVX-512 VL (Vector Length Extensions)</span> |
| <span class="ident">avx512vl</span>, |
| <span class="doccomment">/// AVX-512 IFMA (Integer Fused Multiply Add)</span> |
| <span class="ident">avx512_ifma</span>, |
| <span class="doccomment">/// AVX-512 VBMI (Vector Byte Manipulation Instructions)</span> |
| <span class="ident">avx512_vbmi</span>, |
| <span class="doccomment">/// AVX-512 VPOPCNTDQ (Vector Population Count Doubleword and</span> |
| <span class="doccomment">/// Quadword)</span> |
| <span class="ident">avx512_vpopcntdq</span>, |
| <span class="doccomment">/// F16C (Conversions between IEEE-754 `binary16` and `binary32` formats)</span> |
| <span class="ident">f16c</span>, |
| <span class="doccomment">/// FMA (Fused Multiply Add)</span> |
| <span class="ident">fma</span>, |
| <span class="doccomment">/// BMI1 (Bit Manipulation Instructions 1)</span> |
| <span class="ident">bmi</span>, |
| <span class="doccomment">/// BMI1 (Bit Manipulation Instructions 2)</span> |
| <span class="ident">bmi2</span>, |
| <span class="doccomment">/// ABM (Advanced Bit Manipulation) on AMD / LZCNT (Leading Zero</span> |
| <span class="doccomment">/// Count) on Intel</span> |
| <span class="ident">abm</span>, |
| <span class="doccomment">/// TBM (Trailing Bit Manipulation)</span> |
| <span class="ident">tbm</span>, |
| <span class="doccomment">/// POPCNT (Population Count)</span> |
| <span class="ident">popcnt</span>, |
| <span class="doccomment">/// FXSR (Floating-point context fast save and restor)</span> |
| <span class="ident">fxsr</span>, |
| <span class="doccomment">/// XSAVE (Save Processor Extended States)</span> |
| <span class="ident">xsave</span>, |
| <span class="doccomment">/// XSAVEOPT (Save Processor Extended States Optimized)</span> |
| <span class="ident">xsaveopt</span>, |
| <span class="doccomment">/// XSAVES (Save Processor Extended States Supervisor)</span> |
| <span class="ident">xsaves</span>, |
| <span class="doccomment">/// XSAVEC (Save Processor Extended States Compacted)</span> |
| <span class="ident">xsavec</span>, |
| <span class="doccomment">/// CMPXCH16B, a 16-byte compare-and-swap instruction</span> |
| <span class="ident">cmpxchg16b</span>, |
| <span class="doccomment">/// ADX, Intel ADX (Multi-Precision Add-Carry Instruction Extensions)</span> |
| <span class="ident">adx</span>, |
| <span class="doccomment">/// RTM, Intel (Restricted Transactional Memory)</span> |
| <span class="ident">rtm</span>, |
| } |
| </pre></div> |
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