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
5/*
6 * ====================================================
7 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
8 *
9 * Developed at SunPro, a Sun Microsystems, Inc. business.
10 * Permission to use, copy, modify, and distribute this
11 * software is freely granted, provided that this notice
12 * is preserved.
13 * ====================================================
14 */
15
16#include <sys/cdefs.h>
17#if defined(LIBM_SCCS) && !defined(lint)
18__RCSID("$NetBSD: w_atanhf.c,v 1.5 1999/07/02 15:37:44 simonb Exp $");
19#endif
20
21/*
22 * wrapper atanhf(x)
23 */
24
25#include "math.h"
26#include "math_private.h"
27
28
29float
30atanhf(float x)		/* wrapper atanhf */
31{
32#ifdef _IEEE_LIBM
33	return __ieee754_atanhf(x);
34#else
35	float z,y;
36	z = __ieee754_atanhf(x);
37	if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z;
38	y = fabsf(x);
39	if(y>=(float)1.0) {
40	    if(y>(float)1.0)
41	        /* atanhf(|x|>1) */
42	        return (float)__kernel_standard((double)x,(double)x,130);
43	    else
44	        /* atanhf(|x|==1) */
45	        return (float)__kernel_standard((double)x,(double)x,131);
46	} else
47	    return z;
48#endif
49}
50