1*1e651e1eSRoland Levillain 2*1e651e1eSRoland Levillain /* @(#)w_acosh.c 1.3 95/01/18 */ 3*1e651e1eSRoland Levillain /* 4*1e651e1eSRoland Levillain * ==================================================== 5*1e651e1eSRoland Levillain * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 6*1e651e1eSRoland Levillain * 7*1e651e1eSRoland Levillain * Developed at SunSoft, a Sun Microsystems, Inc. business. 8*1e651e1eSRoland Levillain * Permission to use, copy, modify, and distribute this 9*1e651e1eSRoland Levillain * software is freely granted, provided that this notice 10*1e651e1eSRoland Levillain * is preserved. 11*1e651e1eSRoland Levillain * ==================================================== 12*1e651e1eSRoland Levillain * 13*1e651e1eSRoland Levillain */ 14*1e651e1eSRoland Levillain 15*1e651e1eSRoland Levillain /* 16*1e651e1eSRoland Levillain * wrapper acosh(x) 17*1e651e1eSRoland Levillain */ 18*1e651e1eSRoland Levillain 19*1e651e1eSRoland Levillain #include "fdlibm.h" 20*1e651e1eSRoland Levillain 21*1e651e1eSRoland Levillain #ifdef __STDC__ acosh(double x)22*1e651e1eSRoland Levillain double acosh(double x) /* wrapper acosh */ 23*1e651e1eSRoland Levillain #else 24*1e651e1eSRoland Levillain double acosh(x) /* wrapper acosh */ 25*1e651e1eSRoland Levillain double x; 26*1e651e1eSRoland Levillain #endif 27*1e651e1eSRoland Levillain { 28*1e651e1eSRoland Levillain #ifdef _IEEE_LIBM 29*1e651e1eSRoland Levillain return __ieee754_acosh(x); 30*1e651e1eSRoland Levillain #else 31*1e651e1eSRoland Levillain double z; 32*1e651e1eSRoland Levillain z = __ieee754_acosh(x); 33*1e651e1eSRoland Levillain if(_LIB_VERSION == _IEEE_ || ieee_isnan(x)) return z; 34*1e651e1eSRoland Levillain if(x<1.0) { 35*1e651e1eSRoland Levillain return __kernel_standard(x,x,29); /* acosh(x<1) */ 36*1e651e1eSRoland Levillain } else 37*1e651e1eSRoland Levillain return z; 38*1e651e1eSRoland Levillain #endif 39*1e651e1eSRoland Levillain } 40