js/src/fdlibm/w_acosh.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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  15  *
  16  * The Original Code is Mozilla Communicator client code, released
  17  * March 31, 1998.
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  19  * The Initial Developer of the Original Code is
  20  * Sun Microsystems, Inc.
  21  * Portions created by the Initial Developer are Copyright (C) 1998
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  39
  40 /* @(#)w_acosh.c 1.3 95/01/18 */
  41 /*
  42  * ====================================================
  43  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
  44  *
  45  * Developed at SunSoft, a Sun Microsystems, Inc. business.
  46  * Permission to use, copy, modify, and distribute this
  47  * software is freely granted, provided that this notice
  48  * is preserved.
  49  * ====================================================
  50  *
  51  */
  52
  53 /*
  54  * wrapper acosh(x)
  55  */
  56
  57 #include "fdlibm.h"
  58
  59 #ifdef __STDC__
  60         double fd_acosh(double x)               /* wrapper acosh */
  61 #else
  62         double fd_acosh(x)                      /* wrapper acosh */
  63         double x;
  64 #endif
  65 {
  66 #ifdef _IEEE_LIBM
  67         return __ieee754_acosh(x);
  68 #else
  69         double z;
  70         z = __ieee754_acosh(x);
  71         if(_LIB_VERSION == _IEEE_ || fd_isnan(x)) return z;
  72         if(x<1.0) {
  73         int err;
  74         return __kernel_standard(x,x,29,&err); /* acosh(x<1) */
  75         } else
  76             return z;
  77 #endif
  78 }