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