| <!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 `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/libm-0.2.7/src/math/exp2.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>exp2.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" href="../../../normalize.css"><link rel="stylesheet" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../ayu.css" disabled><link rel="stylesheet" href="../../../dark.css" disabled><link rel="stylesheet" href="../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../storage.js"></script><script defer src="../../../source-script.js"></script><script defer src="../../../source-files.js"></script><script defer src="../../../main.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"><a class="sidebar-logo" href="../../../libm/index.html"><div class="logo-container"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../../libm/index.html"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-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> |
| <span id="50">50</span> |
| <span id="51">51</span> |
| <span id="52">52</span> |
| <span id="53">53</span> |
| <span id="54">54</span> |
| <span id="55">55</span> |
| <span id="56">56</span> |
| <span id="57">57</span> |
| <span id="58">58</span> |
| <span id="59">59</span> |
| <span id="60">60</span> |
| <span id="61">61</span> |
| <span id="62">62</span> |
| <span id="63">63</span> |
| <span id="64">64</span> |
| <span id="65">65</span> |
| <span id="66">66</span> |
| <span id="67">67</span> |
| <span id="68">68</span> |
| <span id="69">69</span> |
| <span id="70">70</span> |
| <span id="71">71</span> |
| <span id="72">72</span> |
| <span id="73">73</span> |
| <span id="74">74</span> |
| <span id="75">75</span> |
| <span id="76">76</span> |
| <span id="77">77</span> |
| <span id="78">78</span> |
| <span id="79">79</span> |
| <span id="80">80</span> |
| <span id="81">81</span> |
| <span id="82">82</span> |
| <span id="83">83</span> |
| <span id="84">84</span> |
| <span id="85">85</span> |
| <span id="86">86</span> |
| <span id="87">87</span> |
| <span id="88">88</span> |
| <span id="89">89</span> |
| <span id="90">90</span> |
| <span id="91">91</span> |
| <span id="92">92</span> |
| <span id="93">93</span> |
| <span id="94">94</span> |
| <span id="95">95</span> |
| <span id="96">96</span> |
| <span id="97">97</span> |
| <span id="98">98</span> |
| <span id="99">99</span> |
| <span id="100">100</span> |
| <span id="101">101</span> |
| <span id="102">102</span> |
| <span id="103">103</span> |
| <span id="104">104</span> |
| <span id="105">105</span> |
| <span id="106">106</span> |
| <span id="107">107</span> |
| <span id="108">108</span> |
| <span id="109">109</span> |
| <span id="110">110</span> |
| <span id="111">111</span> |
| <span id="112">112</span> |
| <span id="113">113</span> |
| <span id="114">114</span> |
| <span id="115">115</span> |
| <span id="116">116</span> |
| <span id="117">117</span> |
| <span id="118">118</span> |
| <span id="119">119</span> |
| <span id="120">120</span> |
| <span id="121">121</span> |
| <span id="122">122</span> |
| <span id="123">123</span> |
| <span id="124">124</span> |
| <span id="125">125</span> |
| <span id="126">126</span> |
| <span id="127">127</span> |
| <span id="128">128</span> |
| <span id="129">129</span> |
| <span id="130">130</span> |
| <span id="131">131</span> |
| <span id="132">132</span> |
| <span id="133">133</span> |
| <span id="134">134</span> |
| <span id="135">135</span> |
| <span id="136">136</span> |
| <span id="137">137</span> |
| <span id="138">138</span> |
| <span id="139">139</span> |
| <span id="140">140</span> |
| <span id="141">141</span> |
| <span id="142">142</span> |
| <span id="143">143</span> |
| <span id="144">144</span> |
| <span id="145">145</span> |
| <span id="146">146</span> |
| <span id="147">147</span> |
| <span id="148">148</span> |
| <span id="149">149</span> |
| <span id="150">150</span> |
| <span id="151">151</span> |
| <span id="152">152</span> |
| <span id="153">153</span> |
| <span id="154">154</span> |
| <span id="155">155</span> |
| <span id="156">156</span> |
| <span id="157">157</span> |
| <span id="158">158</span> |
| <span id="159">159</span> |
| <span id="160">160</span> |
| <span id="161">161</span> |
| <span id="162">162</span> |
| <span id="163">163</span> |
| <span id="164">164</span> |
| <span id="165">165</span> |
| <span id="166">166</span> |
| <span id="167">167</span> |
| <span id="168">168</span> |
| <span id="169">169</span> |
| <span id="170">170</span> |
| <span id="171">171</span> |
| <span id="172">172</span> |
| <span id="173">173</span> |
| <span id="174">174</span> |
| <span id="175">175</span> |
| <span id="176">176</span> |
| <span id="177">177</span> |
| <span id="178">178</span> |
| <span id="179">179</span> |
| <span id="180">180</span> |
| <span id="181">181</span> |
| <span id="182">182</span> |
| <span id="183">183</span> |
| <span id="184">184</span> |
| <span id="185">185</span> |
| <span id="186">186</span> |
| <span id="187">187</span> |
| <span id="188">188</span> |
| <span id="189">189</span> |
| <span id="190">190</span> |
| <span id="191">191</span> |
| <span id="192">192</span> |
| <span id="193">193</span> |
| <span id="194">194</span> |
| <span id="195">195</span> |
| <span id="196">196</span> |
| <span id="197">197</span> |
| <span id="198">198</span> |
| <span id="199">199</span> |
| <span id="200">200</span> |
| <span id="201">201</span> |
| <span id="202">202</span> |
| <span id="203">203</span> |
| <span id="204">204</span> |
| <span id="205">205</span> |
| <span id="206">206</span> |
| <span id="207">207</span> |
| <span id="208">208</span> |
| <span id="209">209</span> |
| <span id="210">210</span> |
| <span id="211">211</span> |
| <span id="212">212</span> |
| <span id="213">213</span> |
| <span id="214">214</span> |
| <span id="215">215</span> |
| <span id="216">216</span> |
| <span id="217">217</span> |
| <span id="218">218</span> |
| <span id="219">219</span> |
| <span id="220">220</span> |
| <span id="221">221</span> |
| <span id="222">222</span> |
| <span id="223">223</span> |
| <span id="224">224</span> |
| <span id="225">225</span> |
| <span id="226">226</span> |
| <span id="227">227</span> |
| <span id="228">228</span> |
| <span id="229">229</span> |
| <span id="230">230</span> |
| <span id="231">231</span> |
| <span id="232">232</span> |
| <span id="233">233</span> |
| <span id="234">234</span> |
| <span id="235">235</span> |
| <span id="236">236</span> |
| <span id="237">237</span> |
| <span id="238">238</span> |
| <span id="239">239</span> |
| <span id="240">240</span> |
| <span id="241">241</span> |
| <span id="242">242</span> |
| <span id="243">243</span> |
| <span id="244">244</span> |
| <span id="245">245</span> |
| <span id="246">246</span> |
| <span id="247">247</span> |
| <span id="248">248</span> |
| <span id="249">249</span> |
| <span id="250">250</span> |
| <span id="251">251</span> |
| <span id="252">252</span> |
| <span id="253">253</span> |
| <span id="254">254</span> |
| <span id="255">255</span> |
| <span id="256">256</span> |
| <span id="257">257</span> |
| <span id="258">258</span> |
| <span id="259">259</span> |
| <span id="260">260</span> |
| <span id="261">261</span> |
| <span id="262">262</span> |
| <span id="263">263</span> |
| <span id="264">264</span> |
| <span id="265">265</span> |
| <span id="266">266</span> |
| <span id="267">267</span> |
| <span id="268">268</span> |
| <span id="269">269</span> |
| <span id="270">270</span> |
| <span id="271">271</span> |
| <span id="272">272</span> |
| <span id="273">273</span> |
| <span id="274">274</span> |
| <span id="275">275</span> |
| <span id="276">276</span> |
| <span id="277">277</span> |
| <span id="278">278</span> |
| <span id="279">279</span> |
| <span id="280">280</span> |
| <span id="281">281</span> |
| <span id="282">282</span> |
| <span id="283">283</span> |
| <span id="284">284</span> |
| <span id="285">285</span> |
| <span id="286">286</span> |
| <span id="287">287</span> |
| <span id="288">288</span> |
| <span id="289">289</span> |
| <span id="290">290</span> |
| <span id="291">291</span> |
| <span id="292">292</span> |
| <span id="293">293</span> |
| <span id="294">294</span> |
| <span id="295">295</span> |
| <span id="296">296</span> |
| <span id="297">297</span> |
| <span id="298">298</span> |
| <span id="299">299</span> |
| <span id="300">300</span> |
| <span id="301">301</span> |
| <span id="302">302</span> |
| <span id="303">303</span> |
| <span id="304">304</span> |
| <span id="305">305</span> |
| <span id="306">306</span> |
| <span id="307">307</span> |
| <span id="308">308</span> |
| <span id="309">309</span> |
| <span id="310">310</span> |
| <span id="311">311</span> |
| <span id="312">312</span> |
| <span id="313">313</span> |
| <span id="314">314</span> |
| <span id="315">315</span> |
| <span id="316">316</span> |
| <span id="317">317</span> |
| <span id="318">318</span> |
| <span id="319">319</span> |
| <span id="320">320</span> |
| <span id="321">321</span> |
| <span id="322">322</span> |
| <span id="323">323</span> |
| <span id="324">324</span> |
| <span id="325">325</span> |
| <span id="326">326</span> |
| <span id="327">327</span> |
| <span id="328">328</span> |
| <span id="329">329</span> |
| <span id="330">330</span> |
| <span id="331">331</span> |
| <span id="332">332</span> |
| <span id="333">333</span> |
| <span id="334">334</span> |
| <span id="335">335</span> |
| <span id="336">336</span> |
| <span id="337">337</span> |
| <span id="338">338</span> |
| <span id="339">339</span> |
| <span id="340">340</span> |
| <span id="341">341</span> |
| <span id="342">342</span> |
| <span id="343">343</span> |
| <span id="344">344</span> |
| <span id="345">345</span> |
| <span id="346">346</span> |
| <span id="347">347</span> |
| <span id="348">348</span> |
| <span id="349">349</span> |
| <span id="350">350</span> |
| <span id="351">351</span> |
| <span id="352">352</span> |
| <span id="353">353</span> |
| <span id="354">354</span> |
| <span id="355">355</span> |
| <span id="356">356</span> |
| <span id="357">357</span> |
| <span id="358">358</span> |
| <span id="359">359</span> |
| <span id="360">360</span> |
| <span id="361">361</span> |
| <span id="362">362</span> |
| <span id="363">363</span> |
| <span id="364">364</span> |
| <span id="365">365</span> |
| <span id="366">366</span> |
| <span id="367">367</span> |
| <span id="368">368</span> |
| <span id="369">369</span> |
| <span id="370">370</span> |
| <span id="371">371</span> |
| <span id="372">372</span> |
| <span id="373">373</span> |
| <span id="374">374</span> |
| <span id="375">375</span> |
| <span id="376">376</span> |
| <span id="377">377</span> |
| <span id="378">378</span> |
| <span id="379">379</span> |
| <span id="380">380</span> |
| <span id="381">381</span> |
| <span id="382">382</span> |
| <span id="383">383</span> |
| <span id="384">384</span> |
| <span id="385">385</span> |
| <span id="386">386</span> |
| <span id="387">387</span> |
| <span id="388">388</span> |
| <span id="389">389</span> |
| <span id="390">390</span> |
| <span id="391">391</span> |
| <span id="392">392</span> |
| <span id="393">393</span> |
| <span id="394">394</span> |
| </pre><pre class="rust"><code><span class="comment">// origin: FreeBSD /usr/src/lib/msun/src/s_exp2.c */ |
| //- |
| // Copyright (c) 2005 David Schultz <das@FreeBSD.ORG> |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions |
| // are met: |
| // 1. Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // 2. Redistributions in binary form must reproduce the above copyright |
| // notice, this list of conditions and the following disclaimer in the |
| // documentation and/or other materials provided with the distribution. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| // ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| // OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| // HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| // LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| // OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| // SUCH DAMAGE. |
| |
| </span><span class="kw">use </span><span class="kw">super</span>::scalbn; |
| |
| <span class="kw">const </span>TBLSIZE: usize = <span class="number">256</span>; |
| |
| <span class="attribute">#[cfg_attr(rustfmt, rustfmt_skip)] |
| </span><span class="kw">static </span>TBL: [u64; TBLSIZE * <span class="number">2</span>] = [ |
| <span class="comment">// exp2(z + eps) eps |
| </span><span class="number">0x3fe6a09e667f3d5d</span>, <span class="number">0x3d39880000000000</span>, |
| <span class="number">0x3fe6b052fa751744</span>, <span class="number">0x3cd8000000000000</span>, |
| <span class="number">0x3fe6c012750bd9fe</span>, <span class="number">0xbd28780000000000</span>, |
| <span class="number">0x3fe6cfdcddd476bf</span>, <span class="number">0x3d1ec00000000000</span>, |
| <span class="number">0x3fe6dfb23c651a29</span>, <span class="number">0xbcd8000000000000</span>, |
| <span class="number">0x3fe6ef9298593ae3</span>, <span class="number">0xbcbc000000000000</span>, |
| <span class="number">0x3fe6ff7df9519386</span>, <span class="number">0xbd2fd80000000000</span>, |
| <span class="number">0x3fe70f7466f42da3</span>, <span class="number">0xbd2c880000000000</span>, |
| <span class="number">0x3fe71f75e8ec5fc3</span>, <span class="number">0x3d13c00000000000</span>, |
| <span class="number">0x3fe72f8286eacf05</span>, <span class="number">0xbd38300000000000</span>, |
| <span class="number">0x3fe73f9a48a58152</span>, <span class="number">0xbd00c00000000000</span>, |
| <span class="number">0x3fe74fbd35d7ccfc</span>, <span class="number">0x3d2f880000000000</span>, |
| <span class="number">0x3fe75feb564267f1</span>, <span class="number">0x3d03e00000000000</span>, |
| <span class="number">0x3fe77024b1ab6d48</span>, <span class="number">0xbd27d00000000000</span>, |
| <span class="number">0x3fe780694fde5d38</span>, <span class="number">0xbcdd000000000000</span>, |
| <span class="number">0x3fe790b938ac1d00</span>, <span class="number">0x3ce3000000000000</span>, |
| <span class="number">0x3fe7a11473eb0178</span>, <span class="number">0xbced000000000000</span>, |
| <span class="number">0x3fe7b17b0976d060</span>, <span class="number">0x3d20400000000000</span>, |
| <span class="number">0x3fe7c1ed0130c133</span>, <span class="number">0x3ca0000000000000</span>, |
| <span class="number">0x3fe7d26a62ff8636</span>, <span class="number">0xbd26900000000000</span>, |
| <span class="number">0x3fe7e2f336cf4e3b</span>, <span class="number">0xbd02e00000000000</span>, |
| <span class="number">0x3fe7f3878491c3e8</span>, <span class="number">0xbd24580000000000</span>, |
| <span class="number">0x3fe80427543e1b4e</span>, <span class="number">0x3d33000000000000</span>, |
| <span class="number">0x3fe814d2add1071a</span>, <span class="number">0x3d0f000000000000</span>, |
| <span class="number">0x3fe82589994ccd7e</span>, <span class="number">0xbd21c00000000000</span>, |
| <span class="number">0x3fe8364c1eb942d0</span>, <span class="number">0x3d29d00000000000</span>, |
| <span class="number">0x3fe8471a4623cab5</span>, <span class="number">0x3d47100000000000</span>, |
| <span class="number">0x3fe857f4179f5bbc</span>, <span class="number">0x3d22600000000000</span>, |
| <span class="number">0x3fe868d99b4491af</span>, <span class="number">0xbd32c40000000000</span>, |
| <span class="number">0x3fe879cad931a395</span>, <span class="number">0xbd23000000000000</span>, |
| <span class="number">0x3fe88ac7d98a65b8</span>, <span class="number">0xbd2a800000000000</span>, |
| <span class="number">0x3fe89bd0a4785800</span>, <span class="number">0xbced000000000000</span>, |
| <span class="number">0x3fe8ace5422aa223</span>, <span class="number">0x3d33280000000000</span>, |
| <span class="number">0x3fe8be05bad619fa</span>, <span class="number">0x3d42b40000000000</span>, |
| <span class="number">0x3fe8cf3216b54383</span>, <span class="number">0xbd2ed00000000000</span>, |
| <span class="number">0x3fe8e06a5e08664c</span>, <span class="number">0xbd20500000000000</span>, |
| <span class="number">0x3fe8f1ae99157807</span>, <span class="number">0x3d28280000000000</span>, |
| <span class="number">0x3fe902fed0282c0e</span>, <span class="number">0xbd1cb00000000000</span>, |
| <span class="number">0x3fe9145b0b91ff96</span>, <span class="number">0xbd05e00000000000</span>, |
| <span class="number">0x3fe925c353aa2ff9</span>, <span class="number">0x3cf5400000000000</span>, |
| <span class="number">0x3fe93737b0cdc64a</span>, <span class="number">0x3d17200000000000</span>, |
| <span class="number">0x3fe948b82b5f98ae</span>, <span class="number">0xbd09000000000000</span>, |
| <span class="number">0x3fe95a44cbc852cb</span>, <span class="number">0x3d25680000000000</span>, |
| <span class="number">0x3fe96bdd9a766f21</span>, <span class="number">0xbd36d00000000000</span>, |
| <span class="number">0x3fe97d829fde4e2a</span>, <span class="number">0xbd01000000000000</span>, |
| <span class="number">0x3fe98f33e47a23a3</span>, <span class="number">0x3d2d000000000000</span>, |
| <span class="number">0x3fe9a0f170ca0604</span>, <span class="number">0xbd38a40000000000</span>, |
| <span class="number">0x3fe9b2bb4d53ff89</span>, <span class="number">0x3d355c0000000000</span>, |
| <span class="number">0x3fe9c49182a3f15b</span>, <span class="number">0x3d26b80000000000</span>, |
| <span class="number">0x3fe9d674194bb8c5</span>, <span class="number">0xbcec000000000000</span>, |
| <span class="number">0x3fe9e86319e3238e</span>, <span class="number">0x3d17d00000000000</span>, |
| <span class="number">0x3fe9fa5e8d07f302</span>, <span class="number">0x3d16400000000000</span>, |
| <span class="number">0x3fea0c667b5de54d</span>, <span class="number">0xbcf5000000000000</span>, |
| <span class="number">0x3fea1e7aed8eb8f6</span>, <span class="number">0x3d09e00000000000</span>, |
| <span class="number">0x3fea309bec4a2e27</span>, <span class="number">0x3d2ad80000000000</span>, |
| <span class="number">0x3fea42c980460a5d</span>, <span class="number">0xbd1af00000000000</span>, |
| <span class="number">0x3fea5503b23e259b</span>, <span class="number">0x3d0b600000000000</span>, |
| <span class="number">0x3fea674a8af46213</span>, <span class="number">0x3d38880000000000</span>, |
| <span class="number">0x3fea799e1330b3a7</span>, <span class="number">0x3d11200000000000</span>, |
| <span class="number">0x3fea8bfe53c12e8d</span>, <span class="number">0x3d06c00000000000</span>, |
| <span class="number">0x3fea9e6b5579fcd2</span>, <span class="number">0xbd29b80000000000</span>, |
| <span class="number">0x3feab0e521356fb8</span>, <span class="number">0x3d2b700000000000</span>, |
| <span class="number">0x3feac36bbfd3f381</span>, <span class="number">0x3cd9000000000000</span>, |
| <span class="number">0x3fead5ff3a3c2780</span>, <span class="number">0x3ce4000000000000</span>, |
| <span class="number">0x3feae89f995ad2a3</span>, <span class="number">0xbd2c900000000000</span>, |
| <span class="number">0x3feafb4ce622f367</span>, <span class="number">0x3d16500000000000</span>, |
| <span class="number">0x3feb0e07298db790</span>, <span class="number">0x3d2fd40000000000</span>, |
| <span class="number">0x3feb20ce6c9a89a9</span>, <span class="number">0x3d12700000000000</span>, |
| <span class="number">0x3feb33a2b84f1a4b</span>, <span class="number">0x3d4d470000000000</span>, |
| <span class="number">0x3feb468415b747e7</span>, <span class="number">0xbd38380000000000</span>, |
| <span class="number">0x3feb59728de5593a</span>, <span class="number">0x3c98000000000000</span>, |
| <span class="number">0x3feb6c6e29f1c56a</span>, <span class="number">0x3d0ad00000000000</span>, |
| <span class="number">0x3feb7f76f2fb5e50</span>, <span class="number">0x3cde800000000000</span>, |
| <span class="number">0x3feb928cf22749b2</span>, <span class="number">0xbd04c00000000000</span>, |
| <span class="number">0x3feba5b030a10603</span>, <span class="number">0xbd0d700000000000</span>, |
| <span class="number">0x3febb8e0b79a6f66</span>, <span class="number">0x3d0d900000000000</span>, |
| <span class="number">0x3febcc1e904bc1ff</span>, <span class="number">0x3d02a00000000000</span>, |
| <span class="number">0x3febdf69c3f3a16f</span>, <span class="number">0xbd1f780000000000</span>, |
| <span class="number">0x3febf2c25bd71db8</span>, <span class="number">0xbd10a00000000000</span>, |
| <span class="number">0x3fec06286141b2e9</span>, <span class="number">0xbd11400000000000</span>, |
| <span class="number">0x3fec199bdd8552e0</span>, <span class="number">0x3d0be00000000000</span>, |
| <span class="number">0x3fec2d1cd9fa64ee</span>, <span class="number">0xbd09400000000000</span>, |
| <span class="number">0x3fec40ab5fffd02f</span>, <span class="number">0xbd0ed00000000000</span>, |
| <span class="number">0x3fec544778fafd15</span>, <span class="number">0x3d39660000000000</span>, |
| <span class="number">0x3fec67f12e57d0cb</span>, <span class="number">0xbd1a100000000000</span>, |
| <span class="number">0x3fec7ba88988c1b6</span>, <span class="number">0xbd58458000000000</span>, |
| <span class="number">0x3fec8f6d9406e733</span>, <span class="number">0xbd1a480000000000</span>, |
| <span class="number">0x3feca3405751c4df</span>, <span class="number">0x3ccb000000000000</span>, |
| <span class="number">0x3fecb720dcef9094</span>, <span class="number">0x3d01400000000000</span>, |
| <span class="number">0x3feccb0f2e6d1689</span>, <span class="number">0x3cf0200000000000</span>, |
| <span class="number">0x3fecdf0b555dc412</span>, <span class="number">0x3cf3600000000000</span>, |
| <span class="number">0x3fecf3155b5bab3b</span>, <span class="number">0xbd06900000000000</span>, |
| <span class="number">0x3fed072d4a0789bc</span>, <span class="number">0x3d09a00000000000</span>, |
| <span class="number">0x3fed1b532b08c8fa</span>, <span class="number">0xbd15e00000000000</span>, |
| <span class="number">0x3fed2f87080d8a85</span>, <span class="number">0x3d1d280000000000</span>, |
| <span class="number">0x3fed43c8eacaa203</span>, <span class="number">0x3d01a00000000000</span>, |
| <span class="number">0x3fed5818dcfba491</span>, <span class="number">0x3cdf000000000000</span>, |
| <span class="number">0x3fed6c76e862e6a1</span>, <span class="number">0xbd03a00000000000</span>, |
| <span class="number">0x3fed80e316c9834e</span>, <span class="number">0xbd0cd80000000000</span>, |
| <span class="number">0x3fed955d71ff6090</span>, <span class="number">0x3cf4c00000000000</span>, |
| <span class="number">0x3feda9e603db32ae</span>, <span class="number">0x3cff900000000000</span>, |
| <span class="number">0x3fedbe7cd63a8325</span>, <span class="number">0x3ce9800000000000</span>, |
| <span class="number">0x3fedd321f301b445</span>, <span class="number">0xbcf5200000000000</span>, |
| <span class="number">0x3fede7d5641c05bf</span>, <span class="number">0xbd1d700000000000</span>, |
| <span class="number">0x3fedfc97337b9aec</span>, <span class="number">0xbd16140000000000</span>, |
| <span class="number">0x3fee11676b197d5e</span>, <span class="number">0x3d0b480000000000</span>, |
| <span class="number">0x3fee264614f5a3e7</span>, <span class="number">0x3d40ce0000000000</span>, |
| <span class="number">0x3fee3b333b16ee5c</span>, <span class="number">0x3d0c680000000000</span>, |
| <span class="number">0x3fee502ee78b3fb4</span>, <span class="number">0xbd09300000000000</span>, |
| <span class="number">0x3fee653924676d68</span>, <span class="number">0xbce5000000000000</span>, |
| <span class="number">0x3fee7a51fbc74c44</span>, <span class="number">0xbd07f80000000000</span>, |
| <span class="number">0x3fee8f7977cdb726</span>, <span class="number">0xbcf3700000000000</span>, |
| <span class="number">0x3feea4afa2a490e8</span>, <span class="number">0x3ce5d00000000000</span>, |
| <span class="number">0x3feeb9f4867ccae4</span>, <span class="number">0x3d161a0000000000</span>, |
| <span class="number">0x3feecf482d8e680d</span>, <span class="number">0x3cf5500000000000</span>, |
| <span class="number">0x3feee4aaa2188514</span>, <span class="number">0x3cc6400000000000</span>, |
| <span class="number">0x3feefa1bee615a13</span>, <span class="number">0xbcee800000000000</span>, |
| <span class="number">0x3fef0f9c1cb64106</span>, <span class="number">0xbcfa880000000000</span>, |
| <span class="number">0x3fef252b376bb963</span>, <span class="number">0xbd2c900000000000</span>, |
| <span class="number">0x3fef3ac948dd7275</span>, <span class="number">0x3caa000000000000</span>, |
| <span class="number">0x3fef50765b6e4524</span>, <span class="number">0xbcf4f00000000000</span>, |
| <span class="number">0x3fef6632798844fd</span>, <span class="number">0x3cca800000000000</span>, |
| <span class="number">0x3fef7bfdad9cbe38</span>, <span class="number">0x3cfabc0000000000</span>, |
| <span class="number">0x3fef91d802243c82</span>, <span class="number">0xbcd4600000000000</span>, |
| <span class="number">0x3fefa7c1819e908e</span>, <span class="number">0xbd0b0c0000000000</span>, |
| <span class="number">0x3fefbdba3692d511</span>, <span class="number">0xbcc0e00000000000</span>, |
| <span class="number">0x3fefd3c22b8f7194</span>, <span class="number">0xbd10de8000000000</span>, |
| <span class="number">0x3fefe9d96b2a23ee</span>, <span class="number">0x3cee430000000000</span>, |
| <span class="number">0x3ff0000000000000</span>, <span class="number">0x0</span>, |
| <span class="number">0x3ff00b1afa5abcbe</span>, <span class="number">0xbcb3400000000000</span>, |
| <span class="number">0x3ff0163da9fb3303</span>, <span class="number">0xbd12170000000000</span>, |
| <span class="number">0x3ff02168143b0282</span>, <span class="number">0x3cba400000000000</span>, |
| <span class="number">0x3ff02c9a3e77806c</span>, <span class="number">0x3cef980000000000</span>, |
| <span class="number">0x3ff037d42e11bbca</span>, <span class="number">0xbcc7400000000000</span>, |
| <span class="number">0x3ff04315e86e7f89</span>, <span class="number">0x3cd8300000000000</span>, |
| <span class="number">0x3ff04e5f72f65467</span>, <span class="number">0xbd1a3f0000000000</span>, |
| <span class="number">0x3ff059b0d315855a</span>, <span class="number">0xbd02840000000000</span>, |
| <span class="number">0x3ff0650a0e3c1f95</span>, <span class="number">0x3cf1600000000000</span>, |
| <span class="number">0x3ff0706b29ddf71a</span>, <span class="number">0x3d15240000000000</span>, |
| <span class="number">0x3ff07bd42b72a82d</span>, <span class="number">0xbce9a00000000000</span>, |
| <span class="number">0x3ff0874518759bd0</span>, <span class="number">0x3ce6400000000000</span>, |
| <span class="number">0x3ff092bdf66607c8</span>, <span class="number">0xbd00780000000000</span>, |
| <span class="number">0x3ff09e3ecac6f383</span>, <span class="number">0xbc98000000000000</span>, |
| <span class="number">0x3ff0a9c79b1f3930</span>, <span class="number">0x3cffa00000000000</span>, |
| <span class="number">0x3ff0b5586cf988fc</span>, <span class="number">0xbcfac80000000000</span>, |
| <span class="number">0x3ff0c0f145e46c8a</span>, <span class="number">0x3cd9c00000000000</span>, |
| <span class="number">0x3ff0cc922b724816</span>, <span class="number">0x3d05200000000000</span>, |
| <span class="number">0x3ff0d83b23395dd8</span>, <span class="number">0xbcfad00000000000</span>, |
| <span class="number">0x3ff0e3ec32d3d1f3</span>, <span class="number">0x3d1bac0000000000</span>, |
| <span class="number">0x3ff0efa55fdfa9a6</span>, <span class="number">0xbd04e80000000000</span>, |
| <span class="number">0x3ff0fb66affed2f0</span>, <span class="number">0xbd0d300000000000</span>, |
| <span class="number">0x3ff1073028d7234b</span>, <span class="number">0x3cf1500000000000</span>, |
| <span class="number">0x3ff11301d0125b5b</span>, <span class="number">0x3cec000000000000</span>, |
| <span class="number">0x3ff11edbab5e2af9</span>, <span class="number">0x3d16bc0000000000</span>, |
| <span class="number">0x3ff12abdc06c31d5</span>, <span class="number">0x3ce8400000000000</span>, |
| <span class="number">0x3ff136a814f2047d</span>, <span class="number">0xbd0ed00000000000</span>, |
| <span class="number">0x3ff1429aaea92de9</span>, <span class="number">0x3ce8e00000000000</span>, |
| <span class="number">0x3ff14e95934f3138</span>, <span class="number">0x3ceb400000000000</span>, |
| <span class="number">0x3ff15a98c8a58e71</span>, <span class="number">0x3d05300000000000</span>, |
| <span class="number">0x3ff166a45471c3df</span>, <span class="number">0x3d03380000000000</span>, |
| <span class="number">0x3ff172b83c7d5211</span>, <span class="number">0x3d28d40000000000</span>, |
| <span class="number">0x3ff17ed48695bb9f</span>, <span class="number">0xbd05d00000000000</span>, |
| <span class="number">0x3ff18af9388c8d93</span>, <span class="number">0xbd1c880000000000</span>, |
| <span class="number">0x3ff1972658375d66</span>, <span class="number">0x3d11f00000000000</span>, |
| <span class="number">0x3ff1a35beb6fcba7</span>, <span class="number">0x3d10480000000000</span>, |
| <span class="number">0x3ff1af99f81387e3</span>, <span class="number">0xbd47390000000000</span>, |
| <span class="number">0x3ff1bbe084045d54</span>, <span class="number">0x3d24e40000000000</span>, |
| <span class="number">0x3ff1c82f95281c43</span>, <span class="number">0xbd0a200000000000</span>, |
| <span class="number">0x3ff1d4873168b9b2</span>, <span class="number">0x3ce3800000000000</span>, |
| <span class="number">0x3ff1e0e75eb44031</span>, <span class="number">0x3ceac00000000000</span>, |
| <span class="number">0x3ff1ed5022fcd938</span>, <span class="number">0x3d01900000000000</span>, |
| <span class="number">0x3ff1f9c18438cdf7</span>, <span class="number">0xbd1b780000000000</span>, |
| <span class="number">0x3ff2063b88628d8f</span>, <span class="number">0x3d2d940000000000</span>, |
| <span class="number">0x3ff212be3578a81e</span>, <span class="number">0x3cd8000000000000</span>, |
| <span class="number">0x3ff21f49917ddd41</span>, <span class="number">0x3d2b340000000000</span>, |
| <span class="number">0x3ff22bdda2791323</span>, <span class="number">0x3d19f80000000000</span>, |
| <span class="number">0x3ff2387a6e7561e7</span>, <span class="number">0xbd19c80000000000</span>, |
| <span class="number">0x3ff2451ffb821427</span>, <span class="number">0x3d02300000000000</span>, |
| <span class="number">0x3ff251ce4fb2a602</span>, <span class="number">0xbd13480000000000</span>, |
| <span class="number">0x3ff25e85711eceb0</span>, <span class="number">0x3d12700000000000</span>, |
| <span class="number">0x3ff26b4565e27d16</span>, <span class="number">0x3d11d00000000000</span>, |
| <span class="number">0x3ff2780e341de00f</span>, <span class="number">0x3d31ee0000000000</span>, |
| <span class="number">0x3ff284dfe1f5633e</span>, <span class="number">0xbd14c00000000000</span>, |
| <span class="number">0x3ff291ba7591bb30</span>, <span class="number">0xbd13d80000000000</span>, |
| <span class="number">0x3ff29e9df51fdf09</span>, <span class="number">0x3d08b00000000000</span>, |
| <span class="number">0x3ff2ab8a66d10e9b</span>, <span class="number">0xbd227c0000000000</span>, |
| <span class="number">0x3ff2b87fd0dada3a</span>, <span class="number">0x3d2a340000000000</span>, |
| <span class="number">0x3ff2c57e39771af9</span>, <span class="number">0xbd10800000000000</span>, |
| <span class="number">0x3ff2d285a6e402d9</span>, <span class="number">0xbd0ed00000000000</span>, |
| <span class="number">0x3ff2df961f641579</span>, <span class="number">0xbcf4200000000000</span>, |
| <span class="number">0x3ff2ecafa93e2ecf</span>, <span class="number">0xbd24980000000000</span>, |
| <span class="number">0x3ff2f9d24abd8822</span>, <span class="number">0xbd16300000000000</span>, |
| <span class="number">0x3ff306fe0a31b625</span>, <span class="number">0xbd32360000000000</span>, |
| <span class="number">0x3ff31432edeea50b</span>, <span class="number">0xbd70df8000000000</span>, |
| <span class="number">0x3ff32170fc4cd7b8</span>, <span class="number">0xbd22480000000000</span>, |
| <span class="number">0x3ff32eb83ba8e9a2</span>, <span class="number">0xbd25980000000000</span>, |
| <span class="number">0x3ff33c08b2641766</span>, <span class="number">0x3d1ed00000000000</span>, |
| <span class="number">0x3ff3496266e3fa27</span>, <span class="number">0xbcdc000000000000</span>, |
| <span class="number">0x3ff356c55f929f0f</span>, <span class="number">0xbd30d80000000000</span>, |
| <span class="number">0x3ff36431a2de88b9</span>, <span class="number">0x3d22c80000000000</span>, |
| <span class="number">0x3ff371a7373aaa39</span>, <span class="number">0x3d20600000000000</span>, |
| <span class="number">0x3ff37f26231e74fe</span>, <span class="number">0xbd16600000000000</span>, |
| <span class="number">0x3ff38cae6d05d838</span>, <span class="number">0xbd0ae00000000000</span>, |
| <span class="number">0x3ff39a401b713ec3</span>, <span class="number">0xbd44720000000000</span>, |
| <span class="number">0x3ff3a7db34e5a020</span>, <span class="number">0x3d08200000000000</span>, |
| <span class="number">0x3ff3b57fbfec6e95</span>, <span class="number">0x3d3e800000000000</span>, |
| <span class="number">0x3ff3c32dc313a8f2</span>, <span class="number">0x3cef800000000000</span>, |
| <span class="number">0x3ff3d0e544ede122</span>, <span class="number">0xbd17a00000000000</span>, |
| <span class="number">0x3ff3dea64c1234bb</span>, <span class="number">0x3d26300000000000</span>, |
| <span class="number">0x3ff3ec70df1c4ecc</span>, <span class="number">0xbd48a60000000000</span>, |
| <span class="number">0x3ff3fa4504ac7e8c</span>, <span class="number">0xbd3cdc0000000000</span>, |
| <span class="number">0x3ff40822c367a0bb</span>, <span class="number">0x3d25b80000000000</span>, |
| <span class="number">0x3ff4160a21f72e95</span>, <span class="number">0x3d1ec00000000000</span>, |
| <span class="number">0x3ff423fb27094646</span>, <span class="number">0xbd13600000000000</span>, |
| <span class="number">0x3ff431f5d950a920</span>, <span class="number">0x3d23980000000000</span>, |
| <span class="number">0x3ff43ffa3f84b9eb</span>, <span class="number">0x3cfa000000000000</span>, |
| <span class="number">0x3ff44e0860618919</span>, <span class="number">0xbcf6c00000000000</span>, |
| <span class="number">0x3ff45c2042a7d201</span>, <span class="number">0xbd0bc00000000000</span>, |
| <span class="number">0x3ff46a41ed1d0016</span>, <span class="number">0xbd12800000000000</span>, |
| <span class="number">0x3ff4786d668b3326</span>, <span class="number">0x3d30e00000000000</span>, |
| <span class="number">0x3ff486a2b5c13c00</span>, <span class="number">0xbd2d400000000000</span>, |
| <span class="number">0x3ff494e1e192af04</span>, <span class="number">0x3d0c200000000000</span>, |
| <span class="number">0x3ff4a32af0d7d372</span>, <span class="number">0xbd1e500000000000</span>, |
| <span class="number">0x3ff4b17dea6db801</span>, <span class="number">0x3d07800000000000</span>, |
| <span class="number">0x3ff4bfdad53629e1</span>, <span class="number">0xbd13800000000000</span>, |
| <span class="number">0x3ff4ce41b817c132</span>, <span class="number">0x3d00800000000000</span>, |
| <span class="number">0x3ff4dcb299fddddb</span>, <span class="number">0x3d2c700000000000</span>, |
| <span class="number">0x3ff4eb2d81d8ab96</span>, <span class="number">0xbd1ce00000000000</span>, |
| <span class="number">0x3ff4f9b2769d2d02</span>, <span class="number">0x3d19200000000000</span>, |
| <span class="number">0x3ff508417f4531c1</span>, <span class="number">0xbd08c00000000000</span>, |
| <span class="number">0x3ff516daa2cf662a</span>, <span class="number">0xbcfa000000000000</span>, |
| <span class="number">0x3ff5257de83f51ea</span>, <span class="number">0x3d4a080000000000</span>, |
| <span class="number">0x3ff5342b569d4eda</span>, <span class="number">0xbd26d80000000000</span>, |
| <span class="number">0x3ff542e2f4f6ac1a</span>, <span class="number">0xbd32440000000000</span>, |
| <span class="number">0x3ff551a4ca5d94db</span>, <span class="number">0x3d483c0000000000</span>, |
| <span class="number">0x3ff56070dde9116b</span>, <span class="number">0x3d24b00000000000</span>, |
| <span class="number">0x3ff56f4736b529de</span>, <span class="number">0x3d415a0000000000</span>, |
| <span class="number">0x3ff57e27dbe2c40e</span>, <span class="number">0xbd29e00000000000</span>, |
| <span class="number">0x3ff58d12d497c76f</span>, <span class="number">0xbd23080000000000</span>, |
| <span class="number">0x3ff59c0827ff0b4c</span>, <span class="number">0x3d4dec0000000000</span>, |
| <span class="number">0x3ff5ab07dd485427</span>, <span class="number">0xbcc4000000000000</span>, |
| <span class="number">0x3ff5ba11fba87af4</span>, <span class="number">0x3d30080000000000</span>, |
| <span class="number">0x3ff5c9268a59460b</span>, <span class="number">0xbd26c80000000000</span>, |
| <span class="number">0x3ff5d84590998e3f</span>, <span class="number">0x3d469a0000000000</span>, |
| <span class="number">0x3ff5e76f15ad20e1</span>, <span class="number">0xbd1b400000000000</span>, |
| <span class="number">0x3ff5f6a320dcebca</span>, <span class="number">0x3d17700000000000</span>, |
| <span class="number">0x3ff605e1b976dcb8</span>, <span class="number">0x3d26f80000000000</span>, |
| <span class="number">0x3ff6152ae6cdf715</span>, <span class="number">0x3d01000000000000</span>, |
| <span class="number">0x3ff6247eb03a5531</span>, <span class="number">0xbd15d00000000000</span>, |
| <span class="number">0x3ff633dd1d1929b5</span>, <span class="number">0xbd12d00000000000</span>, |
| <span class="number">0x3ff6434634ccc313</span>, <span class="number">0xbcea800000000000</span>, |
| <span class="number">0x3ff652b9febc8efa</span>, <span class="number">0xbd28600000000000</span>, |
| <span class="number">0x3ff6623882553397</span>, <span class="number">0x3d71fe0000000000</span>, |
| <span class="number">0x3ff671c1c708328e</span>, <span class="number">0xbd37200000000000</span>, |
| <span class="number">0x3ff68155d44ca97e</span>, <span class="number">0x3ce6800000000000</span>, |
| <span class="number">0x3ff690f4b19e9471</span>, <span class="number">0xbd29780000000000</span>, |
| ]; |
| |
| <span class="comment">// exp2(x): compute the base 2 exponential of x |
| // |
| // Accuracy: Peak error < 0.503 ulp for normalized results. |
| // |
| // Method: (accurate tables) |
| // |
| // Reduce x: |
| // x = k + y, for integer k and |y| <= 1/2. |
| // Thus we have exp2(x) = 2**k * exp2(y). |
| // |
| // Reduce y: |
| // y = i/TBLSIZE + z - eps[i] for integer i near y * TBLSIZE. |
| // Thus we have exp2(y) = exp2(i/TBLSIZE) * exp2(z - eps[i]), |
| // with |z - eps[i]| <= 2**-9 + 2**-39 for the table used. |
| // |
| // We compute exp2(i/TBLSIZE) via table lookup and exp2(z - eps[i]) via |
| // a degree-5 minimax polynomial with maximum error under 1.3 * 2**-61. |
| // The values in exp2t[] and eps[] are chosen such that |
| // exp2t[i] = exp2(i/TBLSIZE + eps[i]), and eps[i] is a small offset such |
| // that exp2t[i] is accurate to 2**-64. |
| // |
| // Note that the range of i is +-TBLSIZE/2, so we actually index the tables |
| // by i0 = i + TBLSIZE/2. For cache efficiency, exp2t[] and eps[] are |
| // virtual tables, interleaved in the real table tbl[]. |
| // |
| // This method is due to Gal, with many details due to Gal and Bachelis: |
| // |
| // Gal, S. and Bachelis, B. An Accurate Elementary Mathematical Library |
| // for the IEEE Floating Point Standard. TOMS 17(1), 26-46 (1991). |
| |
| </span><span class="doccomment">/// Exponential, base 2 (f64) |
| /// |
| /// Calculate `2^x`, that is, 2 raised to the power `x`. |
| </span><span class="attribute">#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] |
| </span><span class="kw">pub fn </span>exp2(<span class="kw-2">mut </span>x: f64) -> f64 { |
| <span class="kw">let </span>redux = f64::from_bits(<span class="number">0x4338000000000000</span>) / TBLSIZE <span class="kw">as </span>f64; |
| <span class="kw">let </span>p1 = f64::from_bits(<span class="number">0x3fe62e42fefa39ef</span>); |
| <span class="kw">let </span>p2 = f64::from_bits(<span class="number">0x3fcebfbdff82c575</span>); |
| <span class="kw">let </span>p3 = f64::from_bits(<span class="number">0x3fac6b08d704a0a6</span>); |
| <span class="kw">let </span>p4 = f64::from_bits(<span class="number">0x3f83b2ab88f70400</span>); |
| <span class="kw">let </span>p5 = f64::from_bits(<span class="number">0x3f55d88003875c74</span>); |
| |
| <span class="comment">// double_t r, t, z; |
| // uint32_t ix, i0; |
| // union {double f; uint64_t i;} u = {x}; |
| // union {uint32_t u; int32_t i;} k; |
| </span><span class="kw">let </span>x1p1023 = f64::from_bits(<span class="number">0x7fe0000000000000</span>); |
| <span class="kw">let </span>x1p52 = f64::from_bits(<span class="number">0x4330000000000000</span>); |
| <span class="kw">let </span>_0x1p_149 = f64::from_bits(<span class="number">0xb6a0000000000000</span>); |
| |
| <span class="comment">/* Filter out exceptional cases. */ |
| </span><span class="kw">let </span>ui = f64::to_bits(x); |
| <span class="kw">let </span>ix = ui >> <span class="number">32 </span>& <span class="number">0x7fffffff</span>; |
| <span class="kw">if </span>ix >= <span class="number">0x408ff000 </span>{ |
| <span class="comment">/* |x| >= 1022 or nan */ |
| </span><span class="kw">if </span>ix >= <span class="number">0x40900000 </span>&& ui >> <span class="number">63 </span>== <span class="number">0 </span>{ |
| <span class="comment">/* x >= 1024 or nan */ |
| /* overflow */ |
| </span>x <span class="kw-2">*</span>= x1p1023; |
| <span class="kw">return </span>x; |
| } |
| <span class="kw">if </span>ix >= <span class="number">0x7ff00000 </span>{ |
| <span class="comment">/* -inf or -nan */ |
| </span><span class="kw">return </span>-<span class="number">1.0 </span>/ x; |
| } |
| <span class="kw">if </span>ui >> <span class="number">63 </span>!= <span class="number">0 </span>{ |
| <span class="comment">/* x <= -1022 */ |
| /* underflow */ |
| </span><span class="kw">if </span>x <= -<span class="number">1075.0 </span>|| x - x1p52 + x1p52 != x { |
| <span class="macro">force_eval!</span>((_0x1p_149 / x) <span class="kw">as </span>f32); |
| } |
| <span class="kw">if </span>x <= -<span class="number">1075.0 </span>{ |
| <span class="kw">return </span><span class="number">0.0</span>; |
| } |
| } |
| } <span class="kw">else if </span>ix < <span class="number">0x3c900000 </span>{ |
| <span class="comment">/* |x| < 0x1p-54 */ |
| </span><span class="kw">return </span><span class="number">1.0 </span>+ x; |
| } |
| |
| <span class="comment">/* Reduce x, computing z, i0, and k. */ |
| </span><span class="kw">let </span>ui = f64::to_bits(x + redux); |
| <span class="kw">let </span><span class="kw-2">mut </span>i0 = ui <span class="kw">as </span>u32; |
| i0 = i0.wrapping_add(TBLSIZE <span class="kw">as </span>u32 / <span class="number">2</span>); |
| <span class="kw">let </span>ku = i0 / TBLSIZE <span class="kw">as </span>u32 * TBLSIZE <span class="kw">as </span>u32; |
| <span class="kw">let </span>ki = <span class="macro">div!</span>(ku <span class="kw">as </span>i32, TBLSIZE <span class="kw">as </span>i32); |
| i0 %= TBLSIZE <span class="kw">as </span>u32; |
| <span class="kw">let </span>uf = f64::from_bits(ui) - redux; |
| <span class="kw">let </span><span class="kw-2">mut </span>z = x - uf; |
| |
| <span class="comment">/* Compute r = exp2(y) = exp2t[i0] * p(z - eps[i]). */ |
| </span><span class="kw">let </span>t = f64::from_bits(<span class="macro">i!</span>(TBL, <span class="number">2 </span>* i0 <span class="kw">as </span>usize)); <span class="comment">/* exp2t[i0] */ |
| </span>z -= f64::from_bits(<span class="macro">i!</span>(TBL, <span class="number">2 </span>* i0 <span class="kw">as </span>usize + <span class="number">1</span>)); <span class="comment">/* eps[i0] */ |
| </span><span class="kw">let </span>r = t + t * z * (p1 + z * (p2 + z * (p3 + z * (p4 + z * p5)))); |
| |
| scalbn(r, ki) |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>i0_wrap_test() { |
| <span class="kw">let </span>x = -<span class="number">3.0 </span>/ <span class="number">256.0</span>; |
| <span class="macro">assert_eq!</span>(exp2(x), f64::from_bits(<span class="number">0x3fefbdba3692d514</span>)); |
| } |
| </code></pre></div> |
| </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="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
