1 /* @(#)w_cosh.c 5.1 93/09/24 */ 2 /* 3 * ==================================================== 4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 5 * 6 * Developed at SunPro, a Sun Microsystems, Inc. business. 7 * Permission to use, copy, modify, and distribute this 8 * software is freely granted, provided that this notice 9 * is preserved. 10 * ==================================================== 11 */ 12 13 #if defined(LIBM_SCCS) && !defined(lint) 14 static char rcsid[] = "$Id: w_cosh.c,v 1.5 1994/09/22 16:45:29 jtc Exp $"; 15 #endif 16 17 /* 18 * wrapper cosh(x) 19 */ 20 21 #include "math.h" 22 #include "math_private.h" 23 24 #ifdef __STDC__ 25 double cosh(double x) /* wrapper cosh */ 26 #else 27 double cosh(x) /* wrapper cosh */ 28 double x; 29 #endif 30 { 31 #ifdef _IEEE_LIBM 32 return __ieee754_cosh(x); 33 #else 34 double z; 35 z = __ieee754_cosh(x); 36 if(_LIB_VERSION == _IEEE_ || isnan(x)) return z; 37 if(fabs(x)>7.10475860073943863426e+02) { 38 return __kernel_standard(x,x,5); /* cosh overflow */ 39 } else 40 return z; 41 #endif 42 } 43