1 /* $NetBSD: fpu_hyperb.c,v 1.6 2011/10/15 15:14:30 tsutsui Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Ken Nakata 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the author nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)fpu_hyperb.c 10/24/95 32 */ 33 34 /* 35 * Copyright (c) 2011 Tetsuya Isaki. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 46 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 47 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 48 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 49 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 50 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 51 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 52 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 53 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 54 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 55 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 56 * SUCH DAMAGE. 57 */ 58 59 #include <sys/cdefs.h> 60 __KERNEL_RCSID(0, "$NetBSD: fpu_hyperb.c,v 1.6 2011/10/15 15:14:30 tsutsui Exp $"); 61 62 #include "fpu_emulate.h" 63 64 /* 65 * fpu_hyperb.c: defines the following functions 66 * 67 * fpu_atanh(), fpu_cosh(), fpu_sinh(), and fpu_tanh() 68 */ 69 70 struct fpn * 71 fpu_atanh(struct fpemu *fe) 72 { 73 /* stub */ 74 return &fe->fe_f2; 75 } 76 77 struct fpn * 78 fpu_cosh(struct fpemu *fe) 79 { 80 struct fpn s0; 81 struct fpn *r; 82 int hyperb = 1; 83 84 fe->fe_fpsr &= ~FPSR_EXCP; /* clear all exceptions */ 85 86 if (ISNAN(&fe->fe_f2)) 87 return &fe->fe_f2; 88 89 if (ISINF(&fe->fe_f2)) { 90 fe->fe_f2.fp_sign = 0; 91 return &fe->fe_f2; 92 } 93 94 fpu_const(&s0, 0x32); /* 1.0 */ 95 r = fpu_sincos_taylor(fe, &s0, 1, hyperb); 96 CPYFPN(&fe->fe_f2, r); 97 98 fpu_upd_fpsr(fe, &fe->fe_f2); 99 return &fe->fe_f2; 100 } 101 102 struct fpn * 103 fpu_sinh(struct fpemu *fe) 104 { 105 struct fpn s0; 106 struct fpn *r; 107 int hyperb = 1; 108 109 fe->fe_fpsr &= ~FPSR_EXCP; /* clear all exceptions */ 110 111 if (ISNAN(&fe->fe_f2)) 112 return &fe->fe_f2; 113 if (ISINF(&fe->fe_f2)) 114 return &fe->fe_f2; 115 116 CPYFPN(&s0, &fe->fe_f2); 117 r = fpu_sincos_taylor(fe, &s0, 2, hyperb); 118 CPYFPN(&fe->fe_f2, r); 119 120 fpu_upd_fpsr(fe, &fe->fe_f2); 121 return &fe->fe_f2; 122 } 123 124 struct fpn * 125 fpu_tanh(struct fpemu *fe) 126 { 127 struct fpn x; 128 struct fpn s; 129 struct fpn *r; 130 int sign; 131 132 fe->fe_fpsr &= ~FPSR_EXCP; /* clear all exceptions */ 133 134 if (ISNAN(&fe->fe_f2)) 135 return &fe->fe_f2; 136 137 if (ISINF(&fe->fe_f2)) { 138 sign = fe->fe_f2.fp_sign; 139 fpu_const(&fe->fe_f2, 0x32); 140 fe->fe_f2.fp_sign = sign; 141 return &fe->fe_f2; 142 } 143 144 CPYFPN(&x, &fe->fe_f2); 145 146 /* sinh(x) */ 147 CPYFPN(&fe->fe_f2, &x); 148 r = fpu_sinh(fe); 149 CPYFPN(&s, r); 150 151 /* cosh(x) */ 152 CPYFPN(&fe->fe_f2, &x); 153 r = fpu_cosh(fe); 154 CPYFPN(&fe->fe_f2, r); 155 156 CPYFPN(&fe->fe_f1, &s); 157 r = fpu_div(fe); 158 159 CPYFPN(&fe->fe_f2, r); 160 161 fpu_upd_fpsr(fe, &fe->fe_f2); 162 return &fe->fe_f2; 163 } 164