POK
coshf.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_coshf.c -- float version of w_cosh.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 #ifdef POK_NEEDS_LIBMATH
33 
34 /*
35  * wrapper coshf(x)
36  */
37 
38 #include <libm.h>
39 #include "namespace.h"
40 #include "math_private.h"
41 
42 #ifdef __weak_alias
43 __weak_alias(coshf, _coshf)
44 #endif
45 
46 float
47 coshf(float x) /* wrapper coshf */
48 {
49 #ifdef _IEEE_LIBM
50  return __ieee754_coshf(x);
51 #else
52  float z;
53  z = __ieee754_coshf(x);
54  if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z;
55  if(fabsf(x)>(float)8.9415985107e+01) {
56  /* cosh overflow */
57  return (float)__kernel_standard((double)x,(double)x,105);
58  } else
59  return z;
60 #endif
61 }
62 
63 #endif