Google Git
Sign in
fuchsia / third_party / rust-mirrors / rand / upstream/gh-pages / . / src / libm / math / hypotf.rs.html
blob: 8a953f0a038c2ce2610b050a24432e295c538924 [file] [log] [blame]
<!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 of the Rust file `&#x2F;home&#x2F;runner&#x2F;.cargo&#x2F;registry&#x2F;src&#x2F;github.com-1ecc6299db9ec823&#x2F;libm-0.2.1&#x2F;src&#x2F;math&#x2F;hypotf.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>hypotf.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Semibold.ttf.woff2"><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="../../../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../../../dark.css" disabled><link rel="stylesheet" type="text/css" href="../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../storage.js"></script><script src="../../../crates.js"></script><script defer src="../../../main.js"></script><script defer src="../../../source-script.js"></script><script defer src="../../../source-files.js"></script>
<noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu" role="button">&#9776;</div><a class="sidebar-logo" href="../../../libm/index.html"><div class="logo-container"><img class="rust-logo" src="../../../rust-logo.png" alt="logo"></div>
</a></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../../../libm/index.html"><img class="rust-logo" src="../../../rust-logo.png" alt="logo"></a><nav class="sub"><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu" title="themes"><img width="18" height="18" alt="Pick another theme!" src="../../../brush.svg"></button><div id="theme-choices" role="menu"></div></div><form class="search-form"><div class="search-container"><div>
<input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" id="help-button" title="help">?</button><a id="settings-menu" href="../../../settings.html" title="settings"><img width="18" height="18" alt="Change settings" src="../../../wheel.svg"></a></div></form></nav></div><section id="main-content" class="content"><div class="example-wrap"><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>
</pre><pre class="rust"><code><span class="kw">use</span> <span class="ident">core::f32</span>;
<span class="kw">use</span> <span class="ident"><span class="kw">super</span>::sqrtf</span>;
<span class="attribute">#[<span class="ident">cfg_attr</span>(<span class="ident">all</span>(<span class="ident">test</span>, <span class="ident">assert_no_panic</span>), <span class="ident">no_panic::no_panic</span>)]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">hypotf</span>(<span class="kw-2">mut</span> <span class="ident">x</span>: <span class="ident">f32</span>, <span class="kw-2">mut</span> <span class="ident">y</span>: <span class="ident">f32</span>) -&gt; <span class="ident">f32</span> {
<span class="kw">let</span> <span class="ident">x1p90</span> <span class="op">=</span> <span class="ident">f32::from_bits</span>(<span class="number">0x6c800000</span>); <span class="comment">// 0x1p90f === 2 ^ 90</span>
<span class="kw">let</span> <span class="ident">x1p_90</span> <span class="op">=</span> <span class="ident">f32::from_bits</span>(<span class="number">0x12800000</span>); <span class="comment">// 0x1p-90f === 2 ^ -90</span>
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">uxi</span> <span class="op">=</span> <span class="ident">x</span>.<span class="ident">to_bits</span>();
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">uyi</span> <span class="op">=</span> <span class="ident">y</span>.<span class="ident">to_bits</span>();
<span class="kw">let</span> <span class="ident">uti</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">z</span>: <span class="ident">f32</span>;
<span class="ident">uxi</span> <span class="op">&amp;=</span> <span class="op">-</span><span class="number">1i32</span> <span class="kw">as</span> <span class="ident">u32</span> <span class="op">&gt;</span><span class="op">&gt;</span> <span class="number">1</span>;
<span class="ident">uyi</span> <span class="op">&amp;=</span> <span class="op">-</span><span class="number">1i32</span> <span class="kw">as</span> <span class="ident">u32</span> <span class="op">&gt;</span><span class="op">&gt;</span> <span class="number">1</span>;
<span class="kw">if</span> <span class="ident">uxi</span> <span class="op">&lt;</span> <span class="ident">uyi</span> {
<span class="ident">uti</span> <span class="op">=</span> <span class="ident">uxi</span>;
<span class="ident">uxi</span> <span class="op">=</span> <span class="ident">uyi</span>;
<span class="ident">uyi</span> <span class="op">=</span> <span class="ident">uti</span>;
}
<span class="ident">x</span> <span class="op">=</span> <span class="ident">f32::from_bits</span>(<span class="ident">uxi</span>);
<span class="ident">y</span> <span class="op">=</span> <span class="ident">f32::from_bits</span>(<span class="ident">uyi</span>);
<span class="kw">if</span> <span class="ident">uyi</span> <span class="op">==</span> <span class="number">0xff</span> <span class="op">&lt;</span><span class="op">&lt;</span> <span class="number">23</span> {
<span class="kw">return</span> <span class="ident">y</span>;
}
<span class="kw">if</span> <span class="ident">uxi</span> <span class="op">&gt;</span><span class="op">=</span> <span class="number">0xff</span> <span class="op">&lt;</span><span class="op">&lt;</span> <span class="number">23</span> <span class="op">|</span><span class="op">|</span> <span class="ident">uyi</span> <span class="op">==</span> <span class="number">0</span> <span class="op">|</span><span class="op">|</span> <span class="ident">uxi</span> <span class="op">-</span> <span class="ident">uyi</span> <span class="op">&gt;</span><span class="op">=</span> <span class="number">25</span> <span class="op">&lt;</span><span class="op">&lt;</span> <span class="number">23</span> {
<span class="kw">return</span> <span class="ident">x</span> <span class="op">+</span> <span class="ident">y</span>;
}
<span class="ident">z</span> <span class="op">=</span> <span class="number">1.</span>;
<span class="kw">if</span> <span class="ident">uxi</span> <span class="op">&gt;</span><span class="op">=</span> (<span class="number">0x7f</span> <span class="op">+</span> <span class="number">60</span>) <span class="op">&lt;</span><span class="op">&lt;</span> <span class="number">23</span> {
<span class="ident">z</span> <span class="op">=</span> <span class="ident">x1p90</span>;
<span class="ident">x</span> <span class="kw-2">*</span><span class="op">=</span> <span class="ident">x1p_90</span>;
<span class="ident">y</span> <span class="kw-2">*</span><span class="op">=</span> <span class="ident">x1p_90</span>;
} <span class="kw">else</span> <span class="kw">if</span> <span class="ident">uyi</span> <span class="op">&lt;</span> (<span class="number">0x7f</span> <span class="op">-</span> <span class="number">60</span>) <span class="op">&lt;</span><span class="op">&lt;</span> <span class="number">23</span> {
<span class="ident">z</span> <span class="op">=</span> <span class="ident">x1p_90</span>;
<span class="ident">x</span> <span class="kw-2">*</span><span class="op">=</span> <span class="ident">x1p90</span>;
<span class="ident">y</span> <span class="kw-2">*</span><span class="op">=</span> <span class="ident">x1p90</span>;
}
<span class="ident">z</span> <span class="op">*</span> <span class="ident">sqrtf</span>((<span class="ident">x</span> <span class="kw">as</span> <span class="ident">f64</span> <span class="op">*</span> <span class="ident">x</span> <span class="kw">as</span> <span class="ident">f64</span> <span class="op">+</span> <span class="ident">y</span> <span class="kw">as</span> <span class="ident">f64</span> <span class="op">*</span> <span class="ident">y</span> <span class="kw">as</span> <span class="ident">f64</span>) <span class="kw">as</span> <span class="ident">f32</span>)
}
</code></pre></div>
</section><section id="search" class="content hidden"></section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="libm" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.60.0-nightly (1bd4fdc94 2022-01-12)" ></div>
</body></html>