math/w_cosh.c

   1 /* Optimizations bu Ulrich Drepper <drepper@gmail.com>, 2011 */
   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 /*
  14  * wrapper cosh(x)
  15  */
  16
  17 #include <math.h>
  18 #include <math_private.h>
  19
  20 double
  21 __cosh (double x)
  22 {
  23         double z = __ieee754_cosh (x);
  24         if (__builtin_expect (!isfinite (z), 0) && isfinite (x)
  25             && _LIB_VERSION != _IEEE_)
  26                 return __kernel_standard (x, x, 5); /* cosh overflow */
  27
  28         return z;
  29 }
  30 weak_alias (__cosh, cosh)
  31 #ifdef NO_LONG_DOUBLE
  32 strong_alias (__cosh, __coshl)
  33 weak_alias (__cosh, coshl)
  34 #endif