1/* $NetBSD: s_sinl.c,v 1.3 2024/04/03 18:53:42 christos Exp $ */ 2 3/*- 4 * SPDX-License-Identifier: BSD-2-Clause 5 * 6 * Copyright (c) 2007 Steven G. Kargl 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice unmodified, this list of conditions, and the following 14 * disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#include <sys/cdefs.h> 32__RCSID("$NetBSD: s_sinl.c,v 1.3 2024/04/03 18:53:42 christos Exp $"); 33 34#include "namespace.h" 35#include <float.h> 36 37#ifdef __weak_alias 38__weak_alias(sinl, _sinl) 39#endif 40 41#include "math.h" 42#include "math_private.h" 43 44#ifdef __HAVE_LONG_DOUBLE 45 46#if LDBL_MANT_DIG == 64 47#include "../ld80/e_rem_pio2l.h" 48#include "../ld80/k_sinl.c" 49#elif LDBL_MANT_DIG == 113 50#include "../ld128/e_rem_pio2l.h" 51#include "../ld128/k_sinl.c" 52#else 53#error "Unsupported long double format" 54#endif 55 56long double 57sinl(long double x) 58{ 59 union ieee_ext_u z; 60 int e0, s; 61 long double y[2]; 62 long double hi, lo; 63 64 z.extu_ld = x; 65 s = z.extu_sign; 66 z.extu_sign = 0; 67 68 /* If x = +-0 or x is a subnormal number, then sin(x) = x */ 69 if (z.extu_exp == 0) 70 return (x); 71 72 /* If x = NaN or Inf, then sin(x) = NaN. */ 73 if (z.extu_exp == 32767) 74 return ((x - x) / (x - x)); 75 76 ENTERI(); 77 78 /* Optimize the case where x is already within range. */ 79 if (z.extu_ld < M_PI_4) { 80 hi = __kernel_sinl(z.extu_ld, 0, 0); 81 RETURNI(s ? -hi : hi); 82 } 83 84 e0 = __ieee754_rem_pio2l(x, y); 85 hi = y[0]; 86 lo = y[1]; 87 88 switch (e0 & 3) { 89 case 0: 90 hi = __kernel_sinl(hi, lo, 1); 91 break; 92 case 1: 93 hi = __kernel_cosl(hi, lo); 94 break; 95 case 2: 96 hi = - __kernel_sinl(hi, lo, 1); 97 break; 98 case 3: 99 hi = - __kernel_cosl(hi, lo); 100 break; 101 } 102 103 RETURNI(hi); 104} 105 106#else 107 108long double 109sinl(long double x) 110{ 111 return sin(x); 112} 113 114#endif /* __HAVE_LONG_DOUBLE */ 115