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[glibc/history.git] / math / w_acosh.c
blobe8322ec6673b23b18da188a3f1cdcebee0f45d21
1 /* @(#)w_acosh.c 5.1 93/09/24 */
2 /*
3 * ====================================================
4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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 * ====================================================
13 #if defined(LIBM_SCCS) && !defined(lint)
14 static char rcsid[] = "$NetBSD: w_acosh.c,v 1.6 1995/05/10 20:48:31 jtc Exp $";
15 #endif
18 * wrapper acosh(x)
21 #include <math.h>
22 #include "math_private.h"
24 #ifdef __STDC__
25 double __acosh(double x) /* wrapper acosh */
26 #else
27 double __acosh(x) /* wrapper acosh */
28 double x;
29 #endif
31 #ifdef _IEEE_LIBM
32 return __ieee754_acosh(x);
33 #else
34 double z;
35 z = __ieee754_acosh(x);
36 if(_LIB_VERSION == _IEEE_ || __isnan(x)) return z;
37 if(x<1.0) {
38 return __kernel_standard(x,x,29); /* acosh(x<1) */
39 } else
40 return z;
41 #endif
43 weak_alias (__acosh, acosh)
44 #ifdef NO_LONG_DOUBLE
45 strong_alias (__acosh, __acoshl)
46 weak_alias (__acosh, acoshl)
47 #endif