2023-05-03 01:35:25 +00:00
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/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
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2023-12-13 07:28:11 +00:00
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│ vi: set noet ft=c ts=8 sw=8 fenc=utf-8 :vi │
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2023-05-03 01:35:25 +00:00
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╚──────────────────────────────────────────────────────────────────────────────╝
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│ │
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│ Musl Libc │
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│ Copyright © 2005-2014 Rich Felker, et al. │
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│ │
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│ Permission is hereby granted, free of charge, to any person obtaining │
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│ a copy of this software and associated documentation files (the │
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│ "Software"), to deal in the Software without restriction, including │
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│ without limitation the rights to use, copy, modify, merge, publish, │
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│ distribute, sublicense, and/or sell copies of the Software, and to │
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│ permit persons to whom the Software is furnished to do so, subject to │
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│ the following conditions: │
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│ │
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│ The above copyright notice and this permission notice shall be │
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│ included in all copies or substantial portions of the Software. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
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│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
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│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
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│ IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY │
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│ CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, │
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│ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE │
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│ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │
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│ │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/math.h"
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#include "libc/tinymath/internal.h"
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#include "libc/tinymath/kernel.internal.h"
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#include "libc/tinymath/ldshape.internal.h"
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2023-05-15 23:32:10 +00:00
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#if !(LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024)
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2023-05-03 01:35:25 +00:00
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asm(".ident\t\"\\n\\n\
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Musl libc (MIT License)\\n\
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Copyright 2005-2014 Rich Felker, et. al.\"");
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asm(".include \"libc/disclaimer.inc\"");
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// clang-format off
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/**
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* Returns sine and cosine of 𝑥.
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*/
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2023-05-14 16:32:15 +00:00
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void sincosl(long double x, long double *sin, long double *cos)
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{
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2023-05-03 01:35:25 +00:00
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union ldshape u = {x};
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unsigned n;
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long double y[2], s, c;
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u.i.se &= 0x7fff;
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if (u.i.se == 0x7fff) {
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*sin = *cos = x - x;
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return;
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}
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if (u.f < M_PI_4) {
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if (u.i.se < 0x3fff - LDBL_MANT_DIG) {
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/* raise underflow if subnormal */
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if (u.i.se == 0) FORCE_EVAL(x*0x1p-120f);
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*sin = x;
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/* raise inexact if x!=0 */
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*cos = 1.0 + x;
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return;
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}
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*sin = __sinl(x, 0, 0);
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*cos = __cosl(x, 0);
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return;
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}
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n = __rem_pio2l(x, y);
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s = __sinl(y[0], y[1], 1);
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c = __cosl(y[0], y[1]);
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switch (n & 3) {
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case 0:
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*sin = s;
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*cos = c;
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break;
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case 1:
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*sin = c;
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*cos = -s;
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break;
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case 2:
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*sin = -s;
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*cos = -c;
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break;
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case 3:
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default:
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*sin = -c;
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*cos = s;
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break;
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}
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}
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2023-05-15 23:32:10 +00:00
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#endif /* long double is long */
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