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4acf9396 GCI |
1 | /* @(#)w_cosh.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 | |
8 | * software is freely granted, provided that this notice | |
9 | * is preserved. | |
10 | * ==================================================== | |
11 | */ | |
12 | ||
13 | #ifndef lint | |
14 | static char rcsid[] = "$Id: w_cosh.c,v 1.3 1994/02/18 02:27:18 jtc Exp $"; | |
15 | #endif | |
16 | ||
17 | /* | |
18 | * wrapper cosh(x) | |
19 | */ | |
20 | ||
21 | #include "math.h" | |
22 | ||
23 | #ifdef __STDC__ | |
24 | double cosh(double x) /* wrapper cosh */ | |
25 | #else | |
26 | double cosh(x) /* wrapper cosh */ | |
27 | double x; | |
28 | #endif | |
29 | { | |
30 | #ifdef _IEEE_LIBM | |
31 | return __ieee754_cosh(x); | |
32 | #else | |
33 | double z; | |
34 | z = __ieee754_cosh(x); | |
35 | if(_LIB_VERSION == _IEEE_ || isnan(x)) return z; | |
36 | if(fabs(x)>7.10475860073943863426e+02) { | |
37 | return __kernel_standard(x,x,5); /* cosh overflow */ | |
38 | } else | |
39 | return z; | |
40 | #endif | |
41 | } |