| <!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/os/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">//! x86 run-time feature detection is OS independent.</span> |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"x86"</span>)]</span> |
| <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">arch</span>::<span class="ident">x86</span>::<span class="kw-2">*</span>; |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">"x86_64"</span>)]</span> |
| <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">arch</span>::<span class="ident">x86_64</span>::<span class="kw-2">*</span>; |
| |
| <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">mem</span>; |
| |
| <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">detect</span>::{<span class="ident">Feature</span>, <span class="ident">cache</span>, <span class="ident">bit</span>}; |
| |
| <span class="doccomment">/// Performs run-time feature detection.</span> |
| <span class="attribute">#[<span class="ident">inline</span>]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">check_for</span>(<span class="ident">x</span>: <span class="ident">Feature</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="ident">cache</span>::<span class="ident">test</span>(<span class="ident">x</span> <span class="kw">as</span> <span class="ident">u32</span>, <span class="ident">detect_features</span>) |
| } |
| |
| <span class="doccomment">/// Run-time feature detection on x86 works by using the CPUID instruction.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// The [CPUID Wikipedia page][wiki_cpuid] contains</span> |
| <span class="doccomment">/// all the information about which flags to set to query which values, and in</span> |
| <span class="doccomment">/// which registers these are reported.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// The definitive references are:</span> |
| <span class="doccomment">/// - [Intel 64 and IA-32 Architectures Software Developer's Manual Volume 2:</span> |
| <span class="doccomment">/// Instruction Set Reference, A-Z][intel64_ref].</span> |
| <span class="doccomment">/// - [AMD64 Architecture Programmer's Manual, Volume 3: General-Purpose and</span> |
| <span class="doccomment">/// System Instructions][amd64_ref].</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// [wiki_cpuid]: https://en.wikipedia.org/wiki/CPUID</span> |
| <span class="doccomment">/// [intel64_ref]: http://www.intel.de/content/dam/www/public/us/en/documents/manuals/64-ia-32-architectures-software-developer-instruction-set-reference-manual-325383.pdf</span> |
| <span class="doccomment">/// [amd64_ref]: http://support.amd.com/TechDocs/24594.pdf</span> |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">clippy</span>::<span class="ident">similar_names</span>)]</span> |
| <span class="kw">fn</span> <span class="ident">detect_features</span>() <span class="op">-></span> <span class="ident">cache</span>::<span class="ident">Initializer</span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">value</span> <span class="op">=</span> <span class="ident">cache</span>::<span class="ident">Initializer</span>::<span class="ident">default</span>(); |
| |
| <span class="comment">// If the x86 CPU does not support the CPUID instruction then it is too</span> |
| <span class="comment">// old to support any of the currently-detectable features.</span> |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">has_cpuid</span>() { |
| <span class="kw">return</span> <span class="ident">value</span>; |
| } |
| |
| <span class="comment">// Calling `__cpuid`/`__cpuid_count` from here on is safe because the CPU</span> |
| <span class="comment">// has `cpuid` support.</span> |
| |
| <span class="comment">// 0. EAX = 0: Basic Information:</span> |
| <span class="comment">// - EAX returns the "Highest Function Parameter", that is, the maximum</span> |
| <span class="comment">// leaf value for subsequent calls of `cpuinfo` in range [0,</span> |
| <span class="comment">// 0x8000_0000]. - The vendor ID is stored in 12 u8 ascii chars,</span> |
| <span class="comment">// returned in EBX, EDX, and ECX (in that order):</span> |
| <span class="kw">let</span> (<span class="ident">max_basic_leaf</span>, <span class="ident">vendor_id</span>) <span class="op">=</span> <span class="kw">unsafe</span> { |
| <span class="kw">let</span> <span class="ident">CpuidResult</span> { |
| <span class="ident">eax</span>: <span class="ident">max_basic_leaf</span>, |
| <span class="ident">ebx</span>, |
| <span class="ident">ecx</span>, |
| <span class="ident">edx</span>, |
| } <span class="op">=</span> <span class="ident">__cpuid</span>(<span class="number">0</span>); |
| <span class="kw">let</span> <span class="ident">vendor_id</span>: [[<span class="ident">u8</span>; <span class="number">4</span>]; <span class="number">3</span>] <span class="op">=</span> [ |
| <span class="ident">mem</span>::<span class="ident">transmute</span>(<span class="ident">ebx</span>), |
| <span class="ident">mem</span>::<span class="ident">transmute</span>(<span class="ident">edx</span>), |
| <span class="ident">mem</span>::<span class="ident">transmute</span>(<span class="ident">ecx</span>), |
| ]; |
| <span class="kw">let</span> <span class="ident">vendor_id</span>: [<span class="ident">u8</span>; <span class="number">12</span>] <span class="op">=</span> <span class="ident">mem</span>::<span class="ident">transmute</span>(<span class="ident">vendor_id</span>); |
| (<span class="ident">max_basic_leaf</span>, <span class="ident">vendor_id</span>) |
| }; |
| |
| <span class="kw">if</span> <span class="ident">max_basic_leaf</span> <span class="op"><</span> <span class="number">1</span> { |
| <span class="comment">// Earlier Intel 486, CPUID not implemented</span> |
| <span class="kw">return</span> <span class="ident">value</span>; |
| } |
| |
| <span class="comment">// EAX = 1, ECX = 0: Queries "Processor Info and Feature Bits";</span> |
| <span class="comment">// Contains information about most x86 features.</span> |
| <span class="kw">let</span> <span class="ident">CpuidResult</span> { |
| <span class="ident">ecx</span>: <span class="ident">proc_info_ecx</span>, |
| <span class="ident">edx</span>: <span class="ident">proc_info_edx</span>, |
| .. |
| } <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">__cpuid</span>(<span class="number">0x0000_0001_u32</span>) }; |
| |
| <span class="comment">// EAX = 7, ECX = 0: Queries "Extended Features";</span> |
| <span class="comment">// Contains information about bmi,bmi2, and avx2 support.</span> |
| <span class="kw">let</span> (<span class="ident">extended_features_ebx</span>, <span class="ident">extended_features_ecx</span>) <span class="op">=</span> <span class="kw">if</span> <span class="ident">max_basic_leaf</span> <span class="op">>=</span> <span class="number">7</span> |
| { |
| <span class="kw">let</span> <span class="ident">CpuidResult</span> { <span class="ident">ebx</span>, <span class="ident">ecx</span>, .. } <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">__cpuid</span>(<span class="number">0x0000_0007_u32</span>) }; |
| (<span class="ident">ebx</span>, <span class="ident">ecx</span>) |
| } <span class="kw">else</span> { |
| (<span class="number">0</span>, <span class="number">0</span>) <span class="comment">// CPUID does not support "Extended Features"</span> |
| }; |
| |
| <span class="comment">// EAX = 0x8000_0000, ECX = 0: Get Highest Extended Function Supported</span> |
| <span class="comment">// - EAX returns the max leaf value for extended information, that is,</span> |
| <span class="comment">// `cpuid` calls in range [0x8000_0000; u32::MAX]:</span> |
| <span class="kw">let</span> <span class="ident">CpuidResult</span> { |
| <span class="ident">eax</span>: <span class="ident">extended_max_basic_leaf</span>, |
| .. |
| } <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">__cpuid</span>(<span class="number">0x8000_0000_u32</span>) }; |
| |
| <span class="comment">// EAX = 0x8000_0001, ECX=0: Queries "Extended Processor Info and Feature</span> |
| <span class="comment">// Bits"</span> |
| <span class="kw">let</span> <span class="ident">extended_proc_info_ecx</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">extended_max_basic_leaf</span> <span class="op">>=</span> <span class="number">1</span> { |
| <span class="kw">let</span> <span class="ident">CpuidResult</span> { <span class="ident">ecx</span>, .. } <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">__cpuid</span>(<span class="number">0x8000_0001_u32</span>) }; |
| <span class="ident">ecx</span> |
| } <span class="kw">else</span> { |
| <span class="number">0</span> |
| }; |
| |
| { |
| <span class="comment">// borrows value till the end of this scope:</span> |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">enable</span> <span class="op">=</span> <span class="op">|</span><span class="ident">r</span>, <span class="ident">rb</span>, <span class="ident">f</span><span class="op">|</span> { |
| <span class="kw">if</span> <span class="ident">bit</span>::<span class="ident">test</span>(<span class="ident">r</span> <span class="kw">as</span> <span class="ident">usize</span>, <span class="ident">rb</span>) { |
| <span class="ident">value</span>.<span class="ident">set</span>(<span class="ident">f</span> <span class="kw">as</span> <span class="ident">u32</span>); |
| } |
| }; |
| |
| <span class="ident">enable</span>(<span class="ident">proc_info_ecx</span>, <span class="number">0</span>, <span class="ident">Feature</span>::<span class="ident">sse3</span>); |
| <span class="ident">enable</span>(<span class="ident">proc_info_ecx</span>, <span class="number">1</span>, <span class="ident">Feature</span>::<span class="ident">pclmulqdq</span>); |
| <span class="ident">enable</span>(<span class="ident">proc_info_ecx</span>, <span class="number">9</span>, <span class="ident">Feature</span>::<span class="ident">ssse3</span>); |
| <span class="ident">enable</span>(<span class="ident">proc_info_ecx</span>, <span class="number">13</span>, <span class="ident">Feature</span>::<span class="ident">cmpxchg16b</span>); |
| <span class="ident">enable</span>(<span class="ident">proc_info_ecx</span>, <span class="number">19</span>, <span class="ident">Feature</span>::<span class="ident">sse4_1</span>); |
| <span class="ident">enable</span>(<span class="ident">proc_info_ecx</span>, <span class="number">20</span>, <span class="ident">Feature</span>::<span class="ident">sse4_2</span>); |
| <span class="ident">enable</span>(<span class="ident">proc_info_ecx</span>, <span class="number">23</span>, <span class="ident">Feature</span>::<span class="ident">popcnt</span>); |
| <span class="ident">enable</span>(<span class="ident">proc_info_ecx</span>, <span class="number">25</span>, <span class="ident">Feature</span>::<span class="ident">aes</span>); |
| <span class="ident">enable</span>(<span class="ident">proc_info_ecx</span>, <span class="number">29</span>, <span class="ident">Feature</span>::<span class="ident">f16c</span>); |
| <span class="ident">enable</span>(<span class="ident">proc_info_ecx</span>, <span class="number">30</span>, <span class="ident">Feature</span>::<span class="ident">rdrand</span>); |
| <span class="ident">enable</span>(<span class="ident">extended_features_ebx</span>, <span class="number">18</span>, <span class="ident">Feature</span>::<span class="ident">rdseed</span>); |
| <span class="ident">enable</span>(<span class="ident">extended_features_ebx</span>, <span class="number">19</span>, <span class="ident">Feature</span>::<span class="ident">adx</span>); |
| <span class="ident">enable</span>(<span class="ident">extended_features_ebx</span>, <span class="number">11</span>, <span class="ident">Feature</span>::<span class="ident">rtm</span>); |
| <span class="ident">enable</span>(<span class="ident">proc_info_edx</span>, <span class="number">4</span>, <span class="ident">Feature</span>::<span class="ident">tsc</span>); |
| <span class="ident">enable</span>(<span class="ident">proc_info_edx</span>, <span class="number">23</span>, <span class="ident">Feature</span>::<span class="ident">mmx</span>); |
| <span class="ident">enable</span>(<span class="ident">proc_info_edx</span>, <span class="number">24</span>, <span class="ident">Feature</span>::<span class="ident">fxsr</span>); |
| <span class="ident">enable</span>(<span class="ident">proc_info_edx</span>, <span class="number">25</span>, <span class="ident">Feature</span>::<span class="ident">sse</span>); |
| <span class="ident">enable</span>(<span class="ident">proc_info_edx</span>, <span class="number">26</span>, <span class="ident">Feature</span>::<span class="ident">sse2</span>); |
| <span class="ident">enable</span>(<span class="ident">extended_features_ebx</span>, <span class="number">29</span>, <span class="ident">Feature</span>::<span class="ident">sha</span>); |
| |
| <span class="ident">enable</span>(<span class="ident">extended_features_ebx</span>, <span class="number">3</span>, <span class="ident">Feature</span>::<span class="ident">bmi</span>); |
| <span class="ident">enable</span>(<span class="ident">extended_features_ebx</span>, <span class="number">8</span>, <span class="ident">Feature</span>::<span class="ident">bmi2</span>); |
| |
| <span class="comment">// `XSAVE` and `AVX` support:</span> |
| <span class="kw">let</span> <span class="ident">cpu_xsave</span> <span class="op">=</span> <span class="ident">bit</span>::<span class="ident">test</span>(<span class="ident">proc_info_ecx</span> <span class="kw">as</span> <span class="ident">usize</span>, <span class="number">26</span>); |
| <span class="kw">if</span> <span class="ident">cpu_xsave</span> { |
| <span class="comment">// 0. Here the CPU supports `XSAVE`.</span> |
| |
| <span class="comment">// 1. Detect `OSXSAVE`, that is, whether the OS is AVX enabled and</span> |
| <span class="comment">// supports saving the state of the AVX/AVX2 vector registers on</span> |
| <span class="comment">// context-switches, see:</span> |
| <span class="comment">//</span> |
| <span class="comment">// - [intel: is avx enabled?][is_avx_enabled],</span> |
| <span class="comment">// - [mozilla: sse.cpp][mozilla_sse_cpp].</span> |
| <span class="comment">//</span> |
| <span class="comment">// [is_avx_enabled]: https://software.intel.com/en-us/blogs/2011/04/14/is-avx-enabled</span> |
| <span class="comment">// [mozilla_sse_cpp]: https://hg.mozilla.org/mozilla-central/file/64bab5cbb9b6/mozglue/build/SSE.cpp#l190</span> |
| <span class="kw">let</span> <span class="ident">cpu_osxsave</span> <span class="op">=</span> <span class="ident">bit</span>::<span class="ident">test</span>(<span class="ident">proc_info_ecx</span> <span class="kw">as</span> <span class="ident">usize</span>, <span class="number">27</span>); |
| |
| <span class="kw">if</span> <span class="ident">cpu_osxsave</span> { |
| <span class="comment">// 2. The OS must have signaled the CPU that it supports saving and</span> |
| <span class="comment">// restoring the:</span> |
| <span class="comment">//</span> |
| <span class="comment">// * SSE -> `XCR0.SSE[1]`</span> |
| <span class="comment">// * AVX -> `XCR0.AVX[2]`</span> |
| <span class="comment">// * AVX-512 -> `XCR0.AVX-512[7:5]`.</span> |
| <span class="comment">//</span> |
| <span class="comment">// by setting the corresponding bits of `XCR0` to `1`.</span> |
| <span class="comment">//</span> |
| <span class="comment">// This is safe because the CPU supports `xsave`</span> |
| <span class="comment">// and the OS has set `osxsave`.</span> |
| <span class="kw">let</span> <span class="ident">xcr0</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">_xgetbv</span>(<span class="number">0</span>) }; |
| <span class="comment">// Test `XCR0.SSE[1]` and `XCR0.AVX[2]` with the mask `0b110 == 6`:</span> |
| <span class="kw">let</span> <span class="ident">os_avx_support</span> <span class="op">=</span> <span class="ident">xcr0</span> <span class="op">&</span> <span class="number">6</span> <span class="op">==</span> <span class="number">6</span>; |
| <span class="comment">// Test `XCR0.AVX-512[7:5]` with the mask `0b1110_0000 == 224`:</span> |
| <span class="kw">let</span> <span class="ident">os_avx512_support</span> <span class="op">=</span> <span class="ident">xcr0</span> <span class="op">&</span> <span class="number">224</span> <span class="op">==</span> <span class="number">224</span>; |
| |
| <span class="comment">// Only if the OS and the CPU support saving/restoring the AVX</span> |
| <span class="comment">// registers we enable `xsave` support:</span> |
| <span class="kw">if</span> <span class="ident">os_avx_support</span> { |
| <span class="comment">// See "13.3 ENABLING THE XSAVE FEATURE SET AND XSAVE-ENABLED</span> |
| <span class="comment">// FEATURES" in the "Intel® 64 and IA-32 Architectures Software</span> |
| <span class="comment">// Developer’s Manual, Volume 1: Basic Architecture":</span> |
| <span class="comment">//</span> |
| <span class="comment">// "Software enables the XSAVE feature set by setting</span> |
| <span class="comment">// CR4.OSXSAVE[bit 18] to 1 (e.g., with the MOV to CR4</span> |
| <span class="comment">// instruction). If this bit is 0, execution of any of XGETBV,</span> |
| <span class="comment">// XRSTOR, XRSTORS, XSAVE, XSAVEC, XSAVEOPT, XSAVES, and XSETBV</span> |
| <span class="comment">// causes an invalid-opcode exception (#UD)"</span> |
| <span class="comment">//</span> |
| <span class="ident">enable</span>(<span class="ident">proc_info_ecx</span>, <span class="number">26</span>, <span class="ident">Feature</span>::<span class="ident">xsave</span>); |
| |
| <span class="comment">// For `xsaveopt`, `xsavec`, and `xsaves` we need to query:</span> |
| <span class="comment">// Processor Extended State Enumeration Sub-leaf (EAX = 0DH,</span> |
| <span class="comment">// ECX = 1):</span> |
| <span class="kw">if</span> <span class="ident">max_basic_leaf</span> <span class="op">>=</span> <span class="number">0xd</span> { |
| <span class="kw">let</span> <span class="ident">CpuidResult</span> { |
| <span class="ident">eax</span>: <span class="ident">proc_extended_state1_eax</span>, |
| .. |
| } <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">__cpuid_count</span>(<span class="number">0xd_u32</span>, <span class="number">1</span>) }; |
| <span class="ident">enable</span>(<span class="ident">proc_extended_state1_eax</span>, <span class="number">0</span>, <span class="ident">Feature</span>::<span class="ident">xsaveopt</span>); |
| <span class="ident">enable</span>(<span class="ident">proc_extended_state1_eax</span>, <span class="number">1</span>, <span class="ident">Feature</span>::<span class="ident">xsavec</span>); |
| <span class="ident">enable</span>(<span class="ident">proc_extended_state1_eax</span>, <span class="number">3</span>, <span class="ident">Feature</span>::<span class="ident">xsaves</span>); |
| } |
| |
| <span class="comment">// FMA (uses 256-bit wide registers):</span> |
| <span class="ident">enable</span>(<span class="ident">proc_info_ecx</span>, <span class="number">12</span>, <span class="ident">Feature</span>::<span class="ident">fma</span>); |
| |
| <span class="comment">// And AVX/AVX2:</span> |
| <span class="ident">enable</span>(<span class="ident">proc_info_ecx</span>, <span class="number">28</span>, <span class="ident">Feature</span>::<span class="ident">avx</span>); |
| <span class="ident">enable</span>(<span class="ident">extended_features_ebx</span>, <span class="number">5</span>, <span class="ident">Feature</span>::<span class="ident">avx2</span>); |
| |
| <span class="comment">// For AVX-512 the OS also needs to support saving/restoring</span> |
| <span class="comment">// the extended state, only then we enable AVX-512 support:</span> |
| <span class="kw">if</span> <span class="ident">os_avx512_support</span> { |
| <span class="ident">enable</span>(<span class="ident">extended_features_ebx</span>, <span class="number">16</span>, <span class="ident">Feature</span>::<span class="ident">avx512f</span>); |
| <span class="ident">enable</span>(<span class="ident">extended_features_ebx</span>, <span class="number">17</span>, <span class="ident">Feature</span>::<span class="ident">avx512dq</span>); |
| <span class="ident">enable</span>(<span class="ident">extended_features_ebx</span>, <span class="number">21</span>, <span class="ident">Feature</span>::<span class="ident">avx512_ifma</span>); |
| <span class="ident">enable</span>(<span class="ident">extended_features_ebx</span>, <span class="number">26</span>, <span class="ident">Feature</span>::<span class="ident">avx512pf</span>); |
| <span class="ident">enable</span>(<span class="ident">extended_features_ebx</span>, <span class="number">27</span>, <span class="ident">Feature</span>::<span class="ident">avx512er</span>); |
| <span class="ident">enable</span>(<span class="ident">extended_features_ebx</span>, <span class="number">28</span>, <span class="ident">Feature</span>::<span class="ident">avx512cd</span>); |
| <span class="ident">enable</span>(<span class="ident">extended_features_ebx</span>, <span class="number">30</span>, <span class="ident">Feature</span>::<span class="ident">avx512bw</span>); |
| <span class="ident">enable</span>(<span class="ident">extended_features_ebx</span>, <span class="number">31</span>, <span class="ident">Feature</span>::<span class="ident">avx512vl</span>); |
| <span class="ident">enable</span>(<span class="ident">extended_features_ecx</span>, <span class="number">1</span>, <span class="ident">Feature</span>::<span class="ident">avx512_vbmi</span>); |
| <span class="ident">enable</span>( |
| <span class="ident">extended_features_ecx</span>, |
| <span class="number">14</span>, |
| <span class="ident">Feature</span>::<span class="ident">avx512_vpopcntdq</span>, |
| ); |
| } |
| } |
| } |
| } |
| |
| <span class="comment">// This detects ABM on AMD CPUs and LZCNT on Intel CPUs.</span> |
| <span class="comment">// On intel CPUs with popcnt, lzcnt implements the</span> |
| <span class="comment">// "missing part" of ABM, so we map both to the same</span> |
| <span class="comment">// internal feature.</span> |
| <span class="comment">//</span> |
| <span class="comment">// The `is_x86_feature_detected!("lzcnt")` macro then</span> |
| <span class="comment">// internally maps to Feature::abm.</span> |
| <span class="ident">enable</span>(<span class="ident">extended_proc_info_ecx</span>, <span class="number">5</span>, <span class="ident">Feature</span>::<span class="ident">abm</span>); |
| <span class="comment">// As Hygon Dhyana originates from AMD technology and shares most of the architecture with</span> |
| <span class="comment">// AMD's family 17h, but with different CPU Vendor ID("HygonGenuine")/Family series</span> |
| <span class="comment">// number(Family 18h).</span> |
| <span class="comment">//</span> |
| <span class="comment">// For CPUID feature bits, Hygon Dhyana(family 18h) share the same definition with AMD</span> |
| <span class="comment">// family 17h.</span> |
| <span class="comment">//</span> |
| <span class="comment">// Related AMD CPUID specification is https://www.amd.com/system/files/TechDocs/25481.pdf.</span> |
| <span class="comment">// Related Hygon kernel patch can be found on</span> |
| <span class="comment">// http://lkml.kernel.org/r/5ce86123a7b9dad925ac583d88d2f921040e859b.1538583282.git.puwen@hygon.cn</span> |
| <span class="kw">if</span> <span class="ident">vendor_id</span> <span class="op">==</span> <span class="kw-2">*</span><span class="string">b"AuthenticAMD"</span> <span class="op">||</span> <span class="ident">vendor_id</span> <span class="op">==</span> <span class="kw-2">*</span><span class="string">b"HygonGenuine"</span> { |
| <span class="comment">// These features are available on AMD arch CPUs:</span> |
| <span class="ident">enable</span>(<span class="ident">extended_proc_info_ecx</span>, <span class="number">6</span>, <span class="ident">Feature</span>::<span class="ident">sse4a</span>); |
| <span class="ident">enable</span>(<span class="ident">extended_proc_info_ecx</span>, <span class="number">21</span>, <span class="ident">Feature</span>::<span class="ident">tbm</span>); |
| } |
| } |
| |
| <span class="ident">value</span> |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span> |
| <span class="kw">mod</span> <span class="ident">tests</span> { |
| <span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">cupid</span>; |
| |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="ident">dump</span>() { |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"aes: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"aes"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"pclmulqdq: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"pclmulqdq"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"rdrand: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"rdrand"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"rdseed: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"rdseed"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"tsc: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"tsc"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"sse: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"sse"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"sse2: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"sse2"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"sse3: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"sse3"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"ssse3: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"ssse3"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"sse4.1: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"sse4.1"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"sse4.2: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"sse4.2"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"sse4a: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"sse4a"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"sha: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"sha"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"avx: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"avx"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"avx2: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"avx2"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"avx512f {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"avx512f"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"avx512cd {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"avx512cd"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"avx512er {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"avx512er"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"avx512pf {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"avx512pf"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"avx512bw {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"avx512bw"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"avx512dq {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"avx512dq"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"avx512vl {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"avx512vl"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"avx512_ifma {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"avx512ifma"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"avx512_vbmi {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"avx512vbmi"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>( |
| <span class="string">"avx512_vpopcntdq {:?}"</span>, |
| <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"avx512vpopcntdq"</span>) |
| ); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"fma: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"fma"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"abm: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"abm"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"bmi: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"bmi1"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"bmi2: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"bmi2"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"tbm: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"tbm"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"popcnt: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"popcnt"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"lzcnt: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"lzcnt"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"fxsr: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"fxsr"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"xsave: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"xsave"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"xsaveopt: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"xsaveopt"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"xsaves: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"xsaves"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"xsavec: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"xsavec"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"cmpxchg16b: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"cmpxchg16b"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"adx: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"adx"</span>)); |
| <span class="macro">println</span><span class="macro">!</span>(<span class="string">"rtm: {:?}"</span>, <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"rtm"</span>)); |
| } |
| |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="ident">compare_with_cupid</span>() { |
| <span class="kw">let</span> <span class="ident">information</span> <span class="op">=</span> <span class="ident">cupid</span>::<span class="ident">master</span>().<span class="ident">unwrap</span>(); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"aes"</span>), <span class="ident">information</span>.<span class="ident">aesni</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"pclmulqdq"</span>), <span class="ident">information</span>.<span class="ident">pclmulqdq</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"rdrand"</span>), <span class="ident">information</span>.<span class="ident">rdrand</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"rdseed"</span>), <span class="ident">information</span>.<span class="ident">rdseed</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"tsc"</span>), <span class="ident">information</span>.<span class="ident">tsc</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"sse"</span>), <span class="ident">information</span>.<span class="ident">sse</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"sse2"</span>), <span class="ident">information</span>.<span class="ident">sse2</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"sse3"</span>), <span class="ident">information</span>.<span class="ident">sse3</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"ssse3"</span>), <span class="ident">information</span>.<span class="ident">ssse3</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"sse4.1"</span>), <span class="ident">information</span>.<span class="ident">sse4_1</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"sse4.2"</span>), <span class="ident">information</span>.<span class="ident">sse4_2</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"sse4a"</span>), <span class="ident">information</span>.<span class="ident">sse4a</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"sha"</span>), <span class="ident">information</span>.<span class="ident">sha</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"avx"</span>), <span class="ident">information</span>.<span class="ident">avx</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"avx2"</span>), <span class="ident">information</span>.<span class="ident">avx2</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"avx512f"</span>), <span class="ident">information</span>.<span class="ident">avx512f</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"avx512cd"</span>), <span class="ident">information</span>.<span class="ident">avx512cd</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"avx512er"</span>), <span class="ident">information</span>.<span class="ident">avx512er</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"avx512pf"</span>), <span class="ident">information</span>.<span class="ident">avx512pf</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"avx512bw"</span>), <span class="ident">information</span>.<span class="ident">avx512bw</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"avx512dq"</span>), <span class="ident">information</span>.<span class="ident">avx512dq</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"avx512vl"</span>), <span class="ident">information</span>.<span class="ident">avx512vl</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>( |
| <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"avx512ifma"</span>), |
| <span class="ident">information</span>.<span class="ident">avx512_ifma</span>() |
| ); |
| <span class="macro">assert_eq</span><span class="macro">!</span>( |
| <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"avx512vbmi"</span>), |
| <span class="ident">information</span>.<span class="ident">avx512_vbmi</span>() |
| ); |
| <span class="macro">assert_eq</span><span class="macro">!</span>( |
| <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"avx512vpopcntdq"</span>), |
| <span class="ident">information</span>.<span class="ident">avx512_vpopcntdq</span>() |
| ); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"fma"</span>), <span class="ident">information</span>.<span class="ident">fma</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"bmi1"</span>), <span class="ident">information</span>.<span class="ident">bmi1</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"bmi2"</span>), <span class="ident">information</span>.<span class="ident">bmi2</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"popcnt"</span>), <span class="ident">information</span>.<span class="ident">popcnt</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"abm"</span>), <span class="ident">information</span>.<span class="ident">lzcnt</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"tbm"</span>), <span class="ident">information</span>.<span class="ident">tbm</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"lzcnt"</span>), <span class="ident">information</span>.<span class="ident">lzcnt</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"xsave"</span>), <span class="ident">information</span>.<span class="ident">xsave</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"xsaveopt"</span>), <span class="ident">information</span>.<span class="ident">xsaveopt</span>()); |
| <span class="macro">assert_eq</span><span class="macro">!</span>( |
| <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"xsavec"</span>), |
| <span class="ident">information</span>.<span class="ident">xsavec_and_xrstor</span>() |
| ); |
| <span class="macro">assert_eq</span><span class="macro">!</span>( |
| <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"xsaves"</span>), |
| <span class="ident">information</span>.<span class="ident">xsaves_xrstors_and_ia32_xss</span>() |
| ); |
| <span class="macro">assert_eq</span><span class="macro">!</span>( |
| <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"cmpxchg16b"</span>), |
| <span class="ident">information</span>.<span class="ident">cmpxchg16b</span>(), |
| ); |
| <span class="macro">assert_eq</span><span class="macro">!</span>( |
| <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"adx"</span>), |
| <span class="ident">information</span>.<span class="ident">adx</span>(), |
| ); |
| <span class="macro">assert_eq</span><span class="macro">!</span>( |
| <span class="macro">is_x86_feature_detected</span><span class="macro">!</span>(<span class="string">"rtm"</span>), |
| <span class="ident">information</span>.<span class="ident">rtm</span>(), |
| ); |
| } |
| } |
| </pre></div> |
| </section><section id="search" class="content hidden"></section><section class="footer"></section><aside id="help" class="hidden"><div><h1 class="hidden">Help</h1><div class="shortcuts"><h2>Keyboard Shortcuts</h2><dl><dt><kbd>?</kbd></dt><dd>Show this help dialog</dd><dt><kbd>S</kbd></dt><dd>Focus the search field</dd><dt><kbd>↑</kbd></dt><dd>Move up in search results</dd><dt><kbd>↓</kbd></dt><dd>Move down in search results</dd><dt><kbd>↹</kbd></dt><dd>Switch tab</dd><dt><kbd>⏎</kbd></dt><dd>Go to active search result</dd><dt><kbd>+</kbd></dt><dd>Expand all sections</dd><dt><kbd>-</kbd></dt><dd>Collapse all sections</dd></dl></div><div class="infos"><h2>Search Tricks</h2><p>Prefix searches with a type followed by a colon (e.g., <code>fn:</code>) to restrict the search to a given type.</p><p>Accepted types are: <code>fn</code>, <code>mod</code>, <code>struct</code>, <code>enum</code>, <code>trait</code>, <code>type</code>, <code>macro</code>, and <code>const</code>.</p><p>Search functions by type signature (e.g., <code>vec -> usize</code> or <code>* -> vec</code>)</p><p>Search multiple things at once by splitting your query with comma (e.g., <code>str,u8</code> or <code>String,struct:Vec,test</code>)</p></div></div></aside><script>window.rootPath = "../../../../";window.currentCrate = "std_detect";</script><script src="../../../../aliases.js"></script><script src="../../../../main.js"></script><script src="../../../../source-script.js"></script><script src="../../../../source-files.js"></script><script defer src="../../../../search-index.js"></script></body></html> |
