libm/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 #if __UCLIBC_HAS_FENV__
  24         double z = __ieee754_cosh (x);
  25         if (__builtin_expect (!isfinite (z), 0) && isfinite (x)
  26             && _LIB_VERSION != _IEEE_)
  27                 return __kernel_standard (x, x, 5); /* cosh overflow */
  28
  29         return z;
  30 #else
  31         return __ieee754_cosh (x);
  32 #endif
  33 }
  34 libm_hidden_def(cosh)