<!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 `libcore/../stdsimd/coresimd/x86_64/avx2.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>avx2.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><link rel="shortcut icon" href="https://doc.rust-lang.org/favicon.ico"></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='../../../../../../core/index.html'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png' alt='logo' width='100'></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"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><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> <span id="2"> 2</span> <span id="3"> 3</span> <span id="4"> 4</span> <span id="5"> 5</span> <span id="6"> 6</span> <span id="7"> 7</span> <span id="8"> 8</span> <span id="9"> 9</span> <span id="10">10</span> <span id="11">11</span> <span id="12">12</span> <span id="13">13</span> <span id="14">14</span> <span id="15">15</span> <span id="16">16</span> <span id="17">17</span> <span id="18">18</span> <span id="19">19</span> <span id="20">20</span> <span id="21">21</span> <span id="22">22</span> <span id="23">23</span> <span id="24">24</span> <span id="25">25</span> <span id="26">26</span> <span id="27">27</span> <span id="28">28</span> <span id="29">29</span> <span id="30">30</span> <span id="31">31</span> <span id="32">32</span> <span id="33">33</span> <span id="34">34</span> <span id="35">35</span> <span id="36">36</span> <span id="37">37</span> <span id="38">38</span> <span id="39">39</span> <span id="40">40</span> <span id="41">41</span> <span id="42">42</span> <span id="43">43</span> <span id="44">44</span> <span id="45">45</span> <span id="46">46</span> <span id="47">47</span> <span id="48">48</span> <span id="49">49</span> </pre><pre class="rust "> <span class="doccomment">//! Advanced Vector Extensions 2 (AVX)</span> <span class="doccomment">//!</span> <span class="doccomment">//! AVX2 expands most AVX commands to 256-bit wide vector registers and</span> <span class="doccomment">//! adds [FMA](https://en.wikipedia.org/wiki/Fused_multiply-accumulate).</span> <span class="doccomment">//!</span> <span class="doccomment">//! The references are:</span> <span class="doccomment">//!</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">//! Wikipedia's [AVX][wiki_avx] and [FMA][wiki_fma] pages provide a quick</span> <span class="doccomment">//! overview of the instructions available.</span> <span class="doccomment">//!</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="doccomment">//! [wiki_avx]: https://en.wikipedia.org/wiki/Advanced_Vector_Extensions</span> <span class="doccomment">//! [wiki_fma]: https://en.wikipedia.org/wiki/Fused_multiply-accumulate</span> <span class="kw">use</span> <span class="ident">coresimd</span>::<span class="ident">simd_llvm</span>::<span class="kw-2">*</span>; <span class="kw">use</span> <span class="ident">coresimd</span>::<span class="ident">x86</span>::<span class="kw-2">*</span>; <span class="doccomment">/// Extract a 64-bit integer from `a`, selected with `imm8`.</span> <span class="doccomment">///</span> <span class="doccomment">/// [Intel's documentation](https://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=_mm256_extract_epi64)</span> <span class="attribute">#[<span class="ident">inline</span>]</span> <span class="attribute">#[<span class="ident">target_feature</span>(<span class="ident">enable</span> <span class="op">=</span> <span class="string">"avx2"</span>)]</span> <span class="attribute">#[<span class="ident">rustc_args_required_const</span>(<span class="number">1</span>)]</span> <span class="comment">// This intrinsic has no corresponding instruction.</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="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">_mm256_extract_epi64</span>(<span class="ident">a</span>: <span class="ident">__m256i</span>, <span class="ident">imm8</span>: <span class="ident">i32</span>) <span class="op">-></span> <span class="ident">i64</span> { <span class="kw">let</span> <span class="ident">imm8</span> <span class="op">=</span> (<span class="ident">imm8</span> <span class="op">&</span> <span class="number">3</span>) <span class="kw">as</span> <span class="ident">u32</span>; <span class="ident">simd_extract</span>(<span class="ident">a</span>.<span class="ident">as_i64x4</span>(), <span class="ident">imm8</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">use</span> <span class="ident">stdsimd_test</span>::<span class="ident">simd_test</span>; <span class="kw">use</span> <span class="ident">coresimd</span>::<span class="ident">arch</span>::<span class="ident">x86_64</span>::<span class="kw-2">*</span>; <span class="attribute">#[<span class="ident">simd_test</span>(<span class="ident">enable</span> <span class="op">=</span> <span class="string">"avx2"</span>)]</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">test_mm256_extract_epi64</span>() { <span class="kw">let</span> <span class="ident">a</span> <span class="op">=</span> <span class="ident">_mm256_setr_epi64x</span>(<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>); <span class="kw">let</span> <span class="ident">r</span> <span class="op">=</span> <span class="ident">_mm256_extract_epi64</span>(<span class="ident">a</span>, <span class="number">3</span>); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">r</span>, <span class="number">3</span>); } } </pre> </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 = "core";</script><script src="../../../../../../aliases.js"></script><script src="../../../../../../main.js"></script><script defer src="../../../../../../search-index.js"></script></body></html>