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  #if defined(LIBM_SCCS) && !defined(lint)
14  static char rcsid[] = "$NetBSD: w_cosh.c,v 1.6 1995/05/10 20:48:47 jtc Exp $";
15  #endif
16  
17  /* 
18   * wrapper cosh(x)
19   */
20  
21  #include "math.h"
22  #include "mathP.h"
23  
24  #ifdef __STDC__
25  	double cosh(double x)		/* wrapper cosh */
26  #else
27  	double cosh(x)			/* wrapper cosh */
28  	double x;
29  #endif
30  {
31  #ifdef _IEEE_LIBM
32  	return __ieee754_cosh(x);
33  #else
34  	double z;
35  	z = __ieee754_cosh(x);
36  	if(_LIB_VERSION == _IEEE_ || isnan(x)) return z;
37  	if(fabs(x)>7.10475860073943863426e+02) {	
38  	        return __kernel_standard(x,x,5); /* cosh overflow */
39  	} else
40  	    return z;
41  #endif
42  }