math/w_coshl.c

   1 /* w_acoshl.c -- long double version of w_acosh.c.
   2  * Conversion to long double by Ulrich Drepper,
   3  * Cygnus Support, drepper@cygnus.com.
   4  * Optimizations bu Ulrich Drepper <drepper@gmail.com>, 2011.
   5  */
   6
   7 /*
   8  * ====================================================
   9  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
  10  *
  11  * Developed at SunPro, a Sun Microsystems, Inc. business.
  12  * Permission to use, copy, modify, and distribute this
  13  * software is freely granted, provided that this notice
  14  * is preserved.
  15  * ====================================================
  16  */
  17
  18 /*
  19  * wrapper coshl(x)
  20  */
  21
  22 #include <math.h>
  23 #include <math_private.h>
  24
  25 long double
  26 __coshl (long double x)
  27 {
  28         long double z = __ieee754_coshl (x);
  29         if (__builtin_expect (!isfinite (z), 0) && isfinite (x)
  30             && _LIB_VERSION != _IEEE_)
  31                 return __kernel_standard_l (x, x, 205); /* cosh overflow */
  32
  33         return z;
  34 }
  35 weak_alias (__coshl, coshl)