POK
acoshf.c
1 /*
2  * POK header
3  *
4  * The following file is a part of the POK project. Any modification should
5  * made according to the POK licence. You CANNOT use this file or a part of
6  * this file is this part of a file for your own project
7  *
8  * For more information on the POK licence, please see our LICENCE FILE
9  *
10  * Please follow the coding guidelines described in doc/CODING_GUIDELINES
11  *
12  * Copyright (c) 2007-2009 POK team
13  *
14  * Created by julien on Fri Jan 30 14:41:34 2009
15  */
16 
17 /* w_acoshf.c -- float version of w_acosh.c.
18  * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
19  */
20 
21 /*
22  * ====================================================
23  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
24  *
25  * Developed at SunPro, a Sun Microsystems, Inc. business.
26  * Permission to use, copy, modify, and distribute this
27  * software is freely granted, provided that this notice
28  * is preserved.
29  * ====================================================
30  *
31  */
32 
33 #ifdef POK_NEEDS_LIBMATH
34 
35 /*
36  * wrapper acoshf(x)
37  */
38 
39 #include <libm.h>
40 #include "math_private.h"
41 
42 float
43 acoshf(float x) /* wrapper acoshf */
44 {
45 #ifdef _IEEE_LIBM
46  return __ieee754_acoshf(x);
47 #else
48  float z;
49  z = __ieee754_acoshf(x);
50  if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z;
51  if(x<(float)1.0) {
52  /* acosh(x<1) */
53  return (float)__kernel_standard((double)x,(double)x,129);
54  } else
55  return z;
56 #endif
57 }
58 
59 #endif