1b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project 2b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project/* @(#)w_atanh.c 1.3 95/01/18 */ 3b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project/* 4b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project * ==================================================== 5b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 6b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project * 7b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project * Developed at SunSoft, a Sun Microsystems, Inc. business. 8b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project * Permission to use, copy, modify, and distribute this 9b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project * software is freely granted, provided that this notice 10b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project * is preserved. 11b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project * ==================================================== 12b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project */ 13b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project/* 14b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project * wrapper atanh(x) 15b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project */ 16b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project 17b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project#include "fdlibm.h" 18b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project 19b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project 20b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project#ifdef __STDC__ 21b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project double atanh(double x) /* wrapper atanh */ 22b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project#else 23b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project double atanh(x) /* wrapper atanh */ 24b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project double x; 25b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project#endif 26b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project{ 27b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project#ifdef _IEEE_LIBM 28b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project return __ieee754_atanh(x); 29b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project#else 30b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project double z,y; 31b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project z = __ieee754_atanh(x); 32b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project if(_LIB_VERSION == _IEEE_ || ieee_isnan(x)) return z; 33b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project y = ieee_fabs(x); 34b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project if(y>=1.0) { 35b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project if(y>1.0) 36b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project return __kernel_standard(x,x,30); /* atanh(|x|>1) */ 37b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project else 38b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project return __kernel_standard(x,x,31); /* atanh(|x|==1) */ 39b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project } else 40b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project return z; 41b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project#endif 42b07e1d9fd8d9e4e03698e0bd9bf77154c5390326The Android Open Source Project} 43