| <!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/rem_pio2.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>rem_pio2.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> |
| </pre><pre class="rust"><code><span class="comment">// origin: FreeBSD /usr/src/lib/msun/src/e_rem_pio2.c |
| // |
| // ==================================================== |
| // Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
| // |
| // Developed at SunPro, a Sun Microsystems, Inc. business. |
| // Permission to use, copy, modify, and distribute this |
| // software is freely granted, provided that this notice |
| // is preserved. |
| // ==================================================== |
| // |
| // Optimized by Bruce D. Evans. */ |
| </span><span class="kw">use </span><span class="kw">super</span>::rem_pio2_large; |
| |
| <span class="comment">// #if FLT_EVAL_METHOD==0 || FLT_EVAL_METHOD==1 |
| // #define EPS DBL_EPSILON |
| </span><span class="kw">const </span>EPS: f64 = <span class="number">2.2204460492503131e-16</span>; |
| <span class="comment">// #elif FLT_EVAL_METHOD==2 |
| // #define EPS LDBL_EPSILON |
| // #endif |
| |
| // TODO: Support FLT_EVAL_METHOD? |
| |
| </span><span class="kw">const </span>TO_INT: f64 = <span class="number">1.5 </span>/ EPS; |
| <span class="doccomment">/// 53 bits of 2/pi |
| </span><span class="kw">const </span>INV_PIO2: f64 = <span class="number">6.36619772367581382433e-01</span>; <span class="comment">/* 0x3FE45F30, 0x6DC9C883 */ |
| </span><span class="doccomment">/// first 33 bits of pi/2 |
| </span><span class="kw">const </span>PIO2_1: f64 = <span class="number">1.57079632673412561417e+00</span>; <span class="comment">/* 0x3FF921FB, 0x54400000 */ |
| </span><span class="doccomment">/// pi/2 - PIO2_1 |
| </span><span class="kw">const </span>PIO2_1T: f64 = <span class="number">6.07710050650619224932e-11</span>; <span class="comment">/* 0x3DD0B461, 0x1A626331 */ |
| </span><span class="doccomment">/// second 33 bits of pi/2 |
| </span><span class="kw">const </span>PIO2_2: f64 = <span class="number">6.07710050630396597660e-11</span>; <span class="comment">/* 0x3DD0B461, 0x1A600000 */ |
| </span><span class="doccomment">/// pi/2 - (PIO2_1+PIO2_2) |
| </span><span class="kw">const </span>PIO2_2T: f64 = <span class="number">2.02226624879595063154e-21</span>; <span class="comment">/* 0x3BA3198A, 0x2E037073 */ |
| </span><span class="doccomment">/// third 33 bits of pi/2 |
| </span><span class="kw">const </span>PIO2_3: f64 = <span class="number">2.02226624871116645580e-21</span>; <span class="comment">/* 0x3BA3198A, 0x2E000000 */ |
| </span><span class="doccomment">/// pi/2 - (PIO2_1+PIO2_2+PIO2_3) |
| </span><span class="kw">const </span>PIO2_3T: f64 = <span class="number">8.47842766036889956997e-32</span>; <span class="comment">/* 0x397B839A, 0x252049C1 */ |
| |
| // return the remainder of x rem pi/2 in y[0]+y[1] |
| // use rem_pio2_large() for large x |
| // |
| // caller must handle the case when reduction is not needed: |x| ~<= pi/4 */ |
| </span><span class="attribute">#[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>rem_pio2(x: f64) -> (i32, f64, f64) { |
| <span class="kw">let </span>x1p24 = f64::from_bits(<span class="number">0x4170000000000000</span>); |
| |
| <span class="kw">let </span>sign = (f64::to_bits(x) >> <span class="number">63</span>) <span class="kw">as </span>i32; |
| <span class="kw">let </span>ix = (f64::to_bits(x) >> <span class="number">32</span>) <span class="kw">as </span>u32 & <span class="number">0x7fffffff</span>; |
| |
| <span class="kw">fn </span>medium(x: f64, ix: u32) -> (i32, f64, f64) { |
| <span class="comment">/* rint(x/(pi/2)), Assume round-to-nearest. */ |
| </span><span class="kw">let </span>tmp = x <span class="kw">as </span>f64 * INV_PIO2 + TO_INT; |
| <span class="comment">// force rounding of tmp to it's storage format on x87 to avoid |
| // excess precision issues. |
| </span><span class="attribute">#[cfg(all(target_arch = <span class="string">"x86"</span>, not(target_feature = <span class="string">"sse2"</span>)))] |
| </span><span class="kw">let </span>tmp = <span class="macro">force_eval!</span>(tmp); |
| <span class="kw">let </span>f_n = tmp - TO_INT; |
| <span class="kw">let </span>n = f_n <span class="kw">as </span>i32; |
| <span class="kw">let </span><span class="kw-2">mut </span>r = x - f_n * PIO2_1; |
| <span class="kw">let </span><span class="kw-2">mut </span>w = f_n * PIO2_1T; <span class="comment">/* 1st round, good to 85 bits */ |
| </span><span class="kw">let </span><span class="kw-2">mut </span>y0 = r - w; |
| <span class="kw">let </span>ui = f64::to_bits(y0); |
| <span class="kw">let </span>ey = (ui >> <span class="number">52</span>) <span class="kw">as </span>i32 & <span class="number">0x7ff</span>; |
| <span class="kw">let </span>ex = (ix >> <span class="number">20</span>) <span class="kw">as </span>i32; |
| <span class="kw">if </span>ex - ey > <span class="number">16 </span>{ |
| <span class="comment">/* 2nd round, good to 118 bits */ |
| </span><span class="kw">let </span>t = r; |
| w = f_n * PIO2_2; |
| r = t - w; |
| w = f_n * PIO2_2T - ((t - r) - w); |
| y0 = r - w; |
| <span class="kw">let </span>ey = (f64::to_bits(y0) >> <span class="number">52</span>) <span class="kw">as </span>i32 & <span class="number">0x7ff</span>; |
| <span class="kw">if </span>ex - ey > <span class="number">49 </span>{ |
| <span class="comment">/* 3rd round, good to 151 bits, covers all cases */ |
| </span><span class="kw">let </span>t = r; |
| w = f_n * PIO2_3; |
| r = t - w; |
| w = f_n * PIO2_3T - ((t - r) - w); |
| y0 = r - w; |
| } |
| } |
| <span class="kw">let </span>y1 = (r - y0) - w; |
| (n, y0, y1) |
| } |
| |
| <span class="kw">if </span>ix <= <span class="number">0x400f6a7a </span>{ |
| <span class="comment">/* |x| ~<= 5pi/4 */ |
| </span><span class="kw">if </span>(ix & <span class="number">0xfffff</span>) == <span class="number">0x921fb </span>{ |
| <span class="comment">/* |x| ~= pi/2 or 2pi/2 */ |
| </span><span class="kw">return </span>medium(x, ix); <span class="comment">/* cancellation -- use medium case */ |
| </span>} |
| <span class="kw">if </span>ix <= <span class="number">0x4002d97c </span>{ |
| <span class="comment">/* |x| ~<= 3pi/4 */ |
| </span><span class="kw">if </span>sign == <span class="number">0 </span>{ |
| <span class="kw">let </span>z = x - PIO2_1; <span class="comment">/* one round good to 85 bits */ |
| </span><span class="kw">let </span>y0 = z - PIO2_1T; |
| <span class="kw">let </span>y1 = (z - y0) - PIO2_1T; |
| <span class="kw">return </span>(<span class="number">1</span>, y0, y1); |
| } <span class="kw">else </span>{ |
| <span class="kw">let </span>z = x + PIO2_1; |
| <span class="kw">let </span>y0 = z + PIO2_1T; |
| <span class="kw">let </span>y1 = (z - y0) + PIO2_1T; |
| <span class="kw">return </span>(-<span class="number">1</span>, y0, y1); |
| } |
| } <span class="kw">else if </span>sign == <span class="number">0 </span>{ |
| <span class="kw">let </span>z = x - <span class="number">2.0 </span>* PIO2_1; |
| <span class="kw">let </span>y0 = z - <span class="number">2.0 </span>* PIO2_1T; |
| <span class="kw">let </span>y1 = (z - y0) - <span class="number">2.0 </span>* PIO2_1T; |
| <span class="kw">return </span>(<span class="number">2</span>, y0, y1); |
| } <span class="kw">else </span>{ |
| <span class="kw">let </span>z = x + <span class="number">2.0 </span>* PIO2_1; |
| <span class="kw">let </span>y0 = z + <span class="number">2.0 </span>* PIO2_1T; |
| <span class="kw">let </span>y1 = (z - y0) + <span class="number">2.0 </span>* PIO2_1T; |
| <span class="kw">return </span>(-<span class="number">2</span>, y0, y1); |
| } |
| } |
| <span class="kw">if </span>ix <= <span class="number">0x401c463b </span>{ |
| <span class="comment">/* |x| ~<= 9pi/4 */ |
| </span><span class="kw">if </span>ix <= <span class="number">0x4015fdbc </span>{ |
| <span class="comment">/* |x| ~<= 7pi/4 */ |
| </span><span class="kw">if </span>ix == <span class="number">0x4012d97c </span>{ |
| <span class="comment">/* |x| ~= 3pi/2 */ |
| </span><span class="kw">return </span>medium(x, ix); |
| } |
| <span class="kw">if </span>sign == <span class="number">0 </span>{ |
| <span class="kw">let </span>z = x - <span class="number">3.0 </span>* PIO2_1; |
| <span class="kw">let </span>y0 = z - <span class="number">3.0 </span>* PIO2_1T; |
| <span class="kw">let </span>y1 = (z - y0) - <span class="number">3.0 </span>* PIO2_1T; |
| <span class="kw">return </span>(<span class="number">3</span>, y0, y1); |
| } <span class="kw">else </span>{ |
| <span class="kw">let </span>z = x + <span class="number">3.0 </span>* PIO2_1; |
| <span class="kw">let </span>y0 = z + <span class="number">3.0 </span>* PIO2_1T; |
| <span class="kw">let </span>y1 = (z - y0) + <span class="number">3.0 </span>* PIO2_1T; |
| <span class="kw">return </span>(-<span class="number">3</span>, y0, y1); |
| } |
| } <span class="kw">else </span>{ |
| <span class="kw">if </span>ix == <span class="number">0x401921fb </span>{ |
| <span class="comment">/* |x| ~= 4pi/2 */ |
| </span><span class="kw">return </span>medium(x, ix); |
| } |
| <span class="kw">if </span>sign == <span class="number">0 </span>{ |
| <span class="kw">let </span>z = x - <span class="number">4.0 </span>* PIO2_1; |
| <span class="kw">let </span>y0 = z - <span class="number">4.0 </span>* PIO2_1T; |
| <span class="kw">let </span>y1 = (z - y0) - <span class="number">4.0 </span>* PIO2_1T; |
| <span class="kw">return </span>(<span class="number">4</span>, y0, y1); |
| } <span class="kw">else </span>{ |
| <span class="kw">let </span>z = x + <span class="number">4.0 </span>* PIO2_1; |
| <span class="kw">let </span>y0 = z + <span class="number">4.0 </span>* PIO2_1T; |
| <span class="kw">let </span>y1 = (z - y0) + <span class="number">4.0 </span>* PIO2_1T; |
| <span class="kw">return </span>(-<span class="number">4</span>, y0, y1); |
| } |
| } |
| } |
| <span class="kw">if </span>ix < <span class="number">0x413921fb </span>{ |
| <span class="comment">/* |x| ~< 2^20*(pi/2), medium size */ |
| </span><span class="kw">return </span>medium(x, ix); |
| } |
| <span class="comment">/* |
| * all other (large) arguments |
| */ |
| </span><span class="kw">if </span>ix >= <span class="number">0x7ff00000 </span>{ |
| <span class="comment">/* x is inf or NaN */ |
| </span><span class="kw">let </span>y0 = x - x; |
| <span class="kw">let </span>y1 = y0; |
| <span class="kw">return </span>(<span class="number">0</span>, y0, y1); |
| } |
| <span class="comment">/* set z = scalbn(|x|,-ilogb(x)+23) */ |
| </span><span class="kw">let </span><span class="kw-2">mut </span>ui = f64::to_bits(x); |
| ui &= (!<span class="number">1</span>) >> <span class="number">12</span>; |
| ui |= (<span class="number">0x3ff </span>+ <span class="number">23</span>) << <span class="number">52</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>z = f64::from_bits(ui); |
| <span class="kw">let </span><span class="kw-2">mut </span>tx = [<span class="number">0.0</span>; <span class="number">3</span>]; |
| <span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..<span class="number">2 </span>{ |
| <span class="macro">i!</span>(tx,i, =, z <span class="kw">as </span>i32 <span class="kw">as </span>f64); |
| z = (z - <span class="macro">i!</span>(tx, i)) * x1p24; |
| } |
| <span class="macro">i!</span>(tx,<span class="number">2</span>, =, z); |
| <span class="comment">/* skip zero terms, first term is non-zero */ |
| </span><span class="kw">let </span><span class="kw-2">mut </span>i = <span class="number">2</span>; |
| <span class="kw">while </span>i != <span class="number">0 </span>&& <span class="macro">i!</span>(tx, i) == <span class="number">0.0 </span>{ |
| i -= <span class="number">1</span>; |
| } |
| <span class="kw">let </span><span class="kw-2">mut </span>ty = [<span class="number">0.0</span>; <span class="number">3</span>]; |
| <span class="kw">let </span>n = rem_pio2_large(<span class="kw-2">&</span>tx[..=i], <span class="kw-2">&mut </span>ty, ((ix <span class="kw">as </span>i32) >> <span class="number">20</span>) - (<span class="number">0x3ff </span>+ <span class="number">23</span>), <span class="number">1</span>); |
| <span class="kw">if </span>sign != <span class="number">0 </span>{ |
| <span class="kw">return </span>(-n, -<span class="macro">i!</span>(ty, <span class="number">0</span>), -<span class="macro">i!</span>(ty, <span class="number">1</span>)); |
| } |
| (n, <span class="macro">i!</span>(ty, <span class="number">0</span>), <span class="macro">i!</span>(ty, <span class="number">1</span>)) |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>tests { |
| <span class="kw">use </span><span class="kw">super</span>::rem_pio2; |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_near_pi() { |
| <span class="kw">let </span>arg = <span class="number">3.141592025756836</span>; |
| <span class="kw">let </span>arg = <span class="macro">force_eval!</span>(arg); |
| <span class="macro">assert_eq!</span>( |
| rem_pio2(arg), |
| (<span class="number">2</span>, -<span class="number">6.278329573009626e-7</span>, -<span class="number">2.1125998133974653e-23</span>) |
| ); |
| <span class="kw">let </span>arg = <span class="number">3.141592033207416</span>; |
| <span class="kw">let </span>arg = <span class="macro">force_eval!</span>(arg); |
| <span class="macro">assert_eq!</span>( |
| rem_pio2(arg), |
| (<span class="number">2</span>, -<span class="number">6.20382377148128e-7</span>, -<span class="number">2.1125998133974653e-23</span>) |
| ); |
| <span class="kw">let </span>arg = <span class="number">3.141592144966125</span>; |
| <span class="kw">let </span>arg = <span class="macro">force_eval!</span>(arg); |
| <span class="macro">assert_eq!</span>( |
| rem_pio2(arg), |
| (<span class="number">2</span>, -<span class="number">5.086236681942706e-7</span>, -<span class="number">2.1125998133974653e-23</span>) |
| ); |
| <span class="kw">let </span>arg = <span class="number">3.141592979431152</span>; |
| <span class="kw">let </span>arg = <span class="macro">force_eval!</span>(arg); |
| <span class="macro">assert_eq!</span>( |
| rem_pio2(arg), |
| (<span class="number">2</span>, <span class="number">3.2584135866119817e-7</span>, -<span class="number">2.1125998133974653e-23</span>) |
| ); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_overflow_b9b847() { |
| <span class="kw">let _ </span>= rem_pio2(-<span class="number">3054214.5490637687</span>); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_overflow_4747b9() { |
| <span class="kw">let _ </span>= rem_pio2(<span class="number">917340800458.2274</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> |
