Add the DragonFly cvs id and perform general cleanups on cvs/rcs/sccs ids. Most
[dragonfly.git] / lib / msun / src / w_atanhf.c
1 /* w_atanhf.c -- float version of w_atanh.c.
2  * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3  *
4  * $FreeBSD: src/lib/msun/src/w_atanhf.c,v 1.5 1999/08/28 00:06:59 peter Exp $
5  * $DragonFly: src/lib/msun/src/Attic/w_atanhf.c,v 1.2 2003/06/17 04:26:53 dillon Exp $
6  */
7
8 /*
9  * ====================================================
10  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
11  *
12  * Developed at SunPro, a Sun Microsystems, Inc. business.
13  * Permission to use, copy, modify, and distribute this
14  * software is freely granted, provided that this notice
15  * is preserved.
16  * ====================================================
17  */
18
19 /*
20  * wrapper atanhf(x)
21  */
22
23 #include "math.h"
24 #include "math_private.h"
25
26
27 #ifdef __STDC__
28         float atanhf(float x)           /* wrapper atanhf */
29 #else
30         float atanhf(x)                 /* wrapper atanhf */
31         float x;
32 #endif
33 {
34 #ifdef _IEEE_LIBM
35         return __ieee754_atanhf(x);
36 #else
37         float z,y;
38         z = __ieee754_atanhf(x);
39         if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z;
40         y = fabsf(x);
41         if(y>=(float)1.0) {
42             if(y>(float)1.0)
43                 /* atanhf(|x|>1) */
44                 return (float)__kernel_standard((double)x,(double)x,130);
45             else
46                 /* atanhf(|x|==1) */
47                 return (float)__kernel_standard((double)x,(double)x,131);
48         } else
49             return z;
50 #endif
51 }