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1 | /* @(#)w_atanh.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 | |
cccda09f | 8 | * software is freely granted, provided that this notice |
f7eac6eb RM |
9 | * is preserved. |
10 | * ==================================================== | |
11 | */ | |
12 | ||
13 | #if defined(LIBM_SCCS) && !defined(lint) | |
14 | static char rcsid[] = "$NetBSD: w_atanh.c,v 1.6 1995/05/10 20:48:43 jtc Exp $"; | |
15 | #endif | |
16 | ||
cccda09f | 17 | /* |
f7eac6eb RM |
18 | * wrapper atanh(x) |
19 | */ | |
20 | ||
21 | #include "math.h" | |
22 | #include "math_private.h" | |
23 | ||
24 | ||
25 | #ifdef __STDC__ | |
26 | double __atanh(double x) /* wrapper atanh */ | |
27 | #else | |
28 | double __atanh(x) /* wrapper atanh */ | |
29 | double x; | |
30 | #endif | |
31 | { | |
32 | #ifdef _IEEE_LIBM | |
33 | return __ieee754_atanh(x); | |
34 | #else | |
35 | double z,y; | |
36 | z = __ieee754_atanh(x); | |
37 | if(_LIB_VERSION == _IEEE_ || __isnan(x)) return z; | |
38 | y = fabs(x); | |
39 | if(y>=1.0) { | |
40 | if(y>1.0) | |
41 | return __kernel_standard(x,x,30); /* atanh(|x|>1) */ | |
cccda09f | 42 | else |
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43 | return __kernel_standard(x,x,31); /* atanh(|x|==1) */ |
44 | } else | |
45 | return z; | |
46 | #endif | |
47 | } | |
48 | weak_alias (__atanh, atanh) | |
cccda09f UD |
49 | #ifdef NO_LONG_DOUBLE |
50 | strong_alias (__atanh, __atanhl) | |
51 | weak_alias (__atanh, atanhl) | |
52 | #endif |