| <!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 `/home/runner/.cargo/registry/src/github.com-1ecc6299db9ec823/libm-0.2.1/src/math/nextafterf.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>nextafterf.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> |
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| <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> |
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| <span id="14">14</span> |
| <span id="15">15</span> |
| <span id="16">16</span> |
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| <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> |
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| <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> |
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| <span id="37">37</span> |
| </pre><pre class="rust"><code><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">nextafterf</span>(<span class="ident">x</span>: <span class="ident">f32</span>, <span class="ident">y</span>: <span class="ident">f32</span>) -> <span class="ident">f32</span> { |
| <span class="kw">if</span> <span class="ident">x</span>.<span class="ident">is_nan</span>() <span class="op">|</span><span class="op">|</span> <span class="ident">y</span>.<span class="ident">is_nan</span>() { |
| <span class="kw">return</span> <span class="ident">x</span> <span class="op">+</span> <span class="ident">y</span>; |
| } |
| |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">ux_i</span> <span class="op">=</span> <span class="ident">x</span>.<span class="ident">to_bits</span>(); |
| <span class="kw">let</span> <span class="ident">uy_i</span> <span class="op">=</span> <span class="ident">y</span>.<span class="ident">to_bits</span>(); |
| <span class="kw">if</span> <span class="ident">ux_i</span> <span class="op">==</span> <span class="ident">uy_i</span> { |
| <span class="kw">return</span> <span class="ident">y</span>; |
| } |
| |
| <span class="kw">let</span> <span class="ident">ax</span> <span class="op">=</span> <span class="ident">ux_i</span> <span class="op">&</span> <span class="number">0x7fff_ffff_u32</span>; |
| <span class="kw">let</span> <span class="ident">ay</span> <span class="op">=</span> <span class="ident">uy_i</span> <span class="op">&</span> <span class="number">0x7fff_ffff_u32</span>; |
| <span class="kw">if</span> <span class="ident">ax</span> <span class="op">==</span> <span class="number">0</span> { |
| <span class="kw">if</span> <span class="ident">ay</span> <span class="op">==</span> <span class="number">0</span> { |
| <span class="kw">return</span> <span class="ident">y</span>; |
| } |
| <span class="ident">ux_i</span> <span class="op">=</span> (<span class="ident">uy_i</span> <span class="op">&</span> <span class="number">0x8000_0000_u32</span>) <span class="op">|</span> <span class="number">1</span>; |
| } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">ax</span> <span class="op">></span> <span class="ident">ay</span> <span class="op">|</span><span class="op">|</span> ((<span class="ident">ux_i</span> <span class="op">^</span> <span class="ident">uy_i</span>) <span class="op">&</span> <span class="number">0x8000_0000_u32</span>) <span class="op">!</span><span class="op">=</span> <span class="number">0</span> { |
| <span class="ident">ux_i</span> <span class="op">-</span><span class="op">=</span> <span class="number">1</span>; |
| } <span class="kw">else</span> { |
| <span class="ident">ux_i</span> <span class="op">+</span><span class="op">=</span> <span class="number">1</span>; |
| } |
| |
| <span class="kw">let</span> <span class="ident">e</span> <span class="op">=</span> <span class="ident">ux_i</span>.<span class="ident">wrapping_shr</span>(<span class="number">0x7f80_0000_u32</span>); |
| <span class="comment">// raise overflow if ux_f is infinite and x is finite</span> |
| <span class="kw">if</span> <span class="ident">e</span> <span class="op">==</span> <span class="number">0x7f80_0000_u32</span> { |
| <span class="macro">force_eval!</span>(<span class="ident">x</span> <span class="op">+</span> <span class="ident">x</span>); |
| } |
| <span class="kw">let</span> <span class="ident">ux_f</span> <span class="op">=</span> <span class="ident">f32::from_bits</span>(<span class="ident">ux_i</span>); |
| <span class="comment">// raise underflow if ux_f is subnormal or zero</span> |
| <span class="kw">if</span> <span class="ident">e</span> <span class="op">==</span> <span class="number">0</span> { |
| <span class="macro">force_eval!</span>(<span class="ident">x</span> <span class="op">*</span> <span class="ident">x</span> <span class="op">+</span> <span class="ident">ux_f</span> <span class="op">*</span> <span class="ident">ux_f</span>); |
| } |
| <span class="ident">ux_f</span> |
| } |
| </code></pre></div> |
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