Sophie: rust-doc-1.28.0-1.mga6 armv7hl

rust-doc-1.28.0-1.mga6.armv7hl.rpm

<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="API documentation for the Rust `_mm256_shuffle_epi8` fn in crate `core`."><meta name="keywords" content="rust, rustlang, rust-lang, _mm256_shuffle_epi8"><title>core::arch::x86_64::_mm256_shuffle_epi8 - Rust</title><link rel="stylesheet" type="text/css" href="../../../normalize.css"><link rel="stylesheet" type="text/css" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../../dark.css"><link rel="stylesheet" type="text/css" href="../../../light.css" id="themeStyle"><script src="../../../storage.js"></script><link rel="shortcut icon" href="https://doc.rust-lang.org/favicon.ico"></head><body class="rustdoc fn"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">&#9776;</div><a href='../../../core/index.html'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png' alt='logo' width='100'></a><div class="sidebar-elems"><p class='location'><a href='../../index.html'>core</a>::<wbr><a href='../index.html'>arch</a>::<wbr><a href='index.html'>x86_64</a></p><script>window.sidebarCurrent = {name: '_mm256_shuffle_epi8', ty: 'fn', relpath: ''};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><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"><h1 class='fqn'><span class='in-band'>Function <a href='../../index.html'>core</a>::<wbr><a href='../index.html'>arch</a>::<wbr><a href='index.html'>x86_64</a>::<wbr><a class="fn" href=''>_mm256_shuffle_epi8</a></span><span class='out-of-band'><span class='since' title='Stable since Rust version 1.27.0'>1.27.0</span><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>&#x2212;</span>]</a></span><a class='srclink' href='../../../src/core/up/stdsimd/coresimd/x86/avx2.rs.html#2787-2789' title='goto source code'>[src]</a></span></h1><pre class='rust fn'>pub unsafe fn _mm256_shuffle_epi8(a: <a class="struct" href="../../../core/arch/x86/struct.__m256i.html" title="struct core::arch::x86::__m256i">__m256i</a>, b: <a class="struct" href="../../../core/arch/x86/struct.__m256i.html" title="struct core::arch::x86::__m256i">__m256i</a>) -&gt; <a class="struct" href="../../../core/arch/x86/struct.__m256i.html" title="struct core::arch::x86::__m256i">__m256i</a></pre><div class='stability'><div class='stab portability'>This is supported on <strong>x86-64 and target feature <code>avx2</code></strong> only.</div></div><div class='docblock'><p>Shuffle bytes from <code>a</code> according to the content of <code>b</code>.</p>
<p>The last 4 bits of each byte of <code>b</code> are used as addresses into the 32 bytes
of <code>a</code>.</p>
<p>In addition, if the highest significant bit of a byte of <code>b</code> is set, the
respective destination byte is set to 0.</p>
<p>The low and high halves of the vectors are shuffled separately.</p>
<p>Picturing <code>a</code> and <code>b</code> as <code>[u8; 32]</code>, <code>_mm256_shuffle_epi8</code> is logically
equivalent to:</p>

<pre class="rust rust-example-rendered">
<span class="kw">fn</span> <span class="ident">mm256_shuffle_epi8</span>(<span class="ident">a</span>: [<span class="ident">u8</span>; <span class="number">32</span>], <span class="ident">b</span>: [<span class="ident">u8</span>; <span class="number">32</span>]) <span class="op">-&gt;</span> [<span class="ident">u8</span>; <span class="number">32</span>] {
    <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">r</span> <span class="op">=</span> [<span class="number">0</span>; <span class="number">32</span>];
    <span class="kw">for</span> <span class="ident">i</span> <span class="kw">in</span> <span class="number">0</span>..<span class="number">16</span> {
        <span class="comment">// if the most significant bit of b is set,</span>
        <span class="comment">// then the destination byte is set to 0.</span>
        <span class="kw">if</span> <span class="ident">b</span>[<span class="ident">i</span>] <span class="op">&amp;</span> <span class="number">0x80</span> <span class="op">==</span> <span class="number">0u8</span> {
            <span class="ident">r</span>[<span class="ident">i</span>] <span class="op">=</span> <span class="ident">a</span>[(<span class="ident">b</span>[<span class="ident">i</span>] <span class="op">%</span> <span class="number">16</span>) <span class="kw">as</span> <span class="ident">usize</span>];
        }
        <span class="kw">if</span> <span class="ident">b</span>[<span class="ident">i</span> <span class="op">+</span> <span class="number">16</span>] <span class="op">&amp;</span> <span class="number">0x80</span> <span class="op">==</span> <span class="number">0u8</span> {
            <span class="ident">r</span>[<span class="ident">i</span> <span class="op">+</span> <span class="number">16</span>] <span class="op">=</span> <span class="ident">a</span>[(<span class="ident">b</span>[<span class="ident">i</span> <span class="op">+</span> <span class="number">16</span>] <span class="op">%</span> <span class="number">16</span> <span class="op">+</span> <span class="number">16</span>) <span class="kw">as</span> <span class="ident">usize</span>];
        }
    }
    <span class="ident">r</span>
}<a class="test-arrow" target="_blank" href="https://play.rust-lang.org/?code=%23!%5Ballow(unused)%5D%0Afn%20main()%20%7B%0Afn%20mm256_shuffle_epi8(a%3A%20%5Bu8%3B%2032%5D%2C%20b%3A%20%5Bu8%3B%2032%5D)%20-%3E%20%5Bu8%3B%2032%5D%20%7B%0A%20%20%20%20let%20mut%20r%20%3D%20%5B0%3B%2032%5D%3B%0A%20%20%20%20for%20i%20in%200..16%20%7B%0A%20%20%20%20%20%20%20%20%2F%2F%20if%20the%20most%20significant%20bit%20of%20b%20is%20set%2C%0A%20%20%20%20%20%20%20%20%2F%2F%20then%20the%20destination%20byte%20is%20set%20to%200.%0A%20%20%20%20%20%20%20%20if%20b%5Bi%5D%20%26%200x80%20%3D%3D%200u8%20%7B%0A%20%20%20%20%20%20%20%20%20%20%20%20r%5Bi%5D%20%3D%20a%5B(b%5Bi%5D%20%25%2016)%20as%20usize%5D%3B%0A%20%20%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20%20%20if%20b%5Bi%20%2B%2016%5D%20%26%200x80%20%3D%3D%200u8%20%7B%0A%20%20%20%20%20%20%20%20%20%20%20%20r%5Bi%20%2B%2016%5D%20%3D%20a%5B(b%5Bi%20%2B%2016%5D%20%25%2016%20%2B%2016)%20as%20usize%5D%3B%0A%20%20%20%20%20%20%20%20%7D%0A%20%20%20%20%7D%0A%20%20%20%20r%0A%7D%0A%7D">Run</a></pre>
<p><a href="https://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=_mm256_shuffle_epi8">Intel's documentation</a></p>
</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>&#9166;</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>