1/*- 2 * Copyright (c) 2007, 2010-2013 Steven G. Kargl 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 * s_sinl.c and s_cosl.c merged by Steven G. Kargl. 27 */ 28 29#include <sys/cdefs.h> 30#if 0 31__FBSDID("$FreeBSD: head/lib/msun/src/s_sincosl.c 319047 2017-05-28 06:13:38Z mmel $"); 32#endif 33#if defined(LIBM_SCCS) && !defined(lint) 34__RCSID("$NetBSD: s_sincosl.c,v 1.4 2024/04/03 18:53:42 christos Exp $"); 35#endif 36 37#include "namespace.h" 38#include <float.h> 39 40#include "math.h" 41#include "math_private.h" 42 43#ifdef __weak_alias 44__weak_alias(sincosl,_sincosl) 45#endif 46 47#ifdef __HAVE_LONG_DOUBLE 48 49#include "k_sincosl.h" 50 51#if LDBL_MANT_DIG == 64 52#include "../ld80/e_rem_pio2l.h" 53#elif LDBL_MANT_DIG == 113 54#include "../ld128/e_rem_pio2l.h" 55#else 56#error "Unsupported long double format" 57#endif 58 59void 60sincosl(long double x, long double *sn, long double *cs) 61{ 62 union ieee_ext_u z; 63 int e0; 64 long double y[2]; 65 66 z.extu_ld = x; 67 z.extu_sign = 0; 68 69 ENTERV(); 70 71 /* Optimize the case where x is already within range. */ 72 if (z.extu_ld < M_PI_4) { 73 /* 74 * If x = +-0 or x is a subnormal number, then sin(x) = x and 75 * cos(x) = 1. 76 */ 77 if (z.extu_exp == 0) { 78 *sn = x; 79 *cs = 1; 80 } else 81 __kernel_sincosl(x, 0, 0, sn, cs); 82 RETURNV(); 83 } 84 85 /* If x = NaN or Inf, then sin(x) and cos(x) are NaN. */ 86 if (z.extu_exp == 32767) { 87 *sn = x - x; 88 *cs = x - x; 89 RETURNV(); 90 } 91 92 /* Range reduction. */ 93 e0 = __ieee754_rem_pio2l(x, y); 94 95 switch (e0 & 3) { 96 case 0: 97 __kernel_sincosl(y[0], y[1], 1, sn, cs); 98 break; 99 case 1: 100 __kernel_sincosl(y[0], y[1], 1, cs, sn); 101 *cs = -*cs; 102 break; 103 case 2: 104 __kernel_sincosl(y[0], y[1], 1, sn, cs); 105 *sn = -*sn; 106 *cs = -*cs; 107 break; 108 default: 109 __kernel_sincosl(y[0], y[1], 1, cs, sn); 110 *sn = -*sn; 111 } 112 113 RETURNV(); 114} 115 116#else 117 118void 119sincosl(long double x, long double *sn, long double *cs) 120{ 121 double snn, css; 122 sincos(x, &snn, &css); 123 *sn = snn; 124 *cs = css; 125} 126 127#endif 128