text: /* Complex cosine hyperbole function for double.
     Copyright (C) 1997-2012 Free Software Foundation, Inc.
     This file is part of the GNU C Library.
     Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
  
     The GNU C Library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 of the License, or (at your option) any later version.
  
     The GNU C Library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Lesser General Public License for more details.
  
     You should have received a copy of the GNU Lesser General Public
     License along with the GNU C Library; if not, see
     <http://www.gnu.org/licenses/>.  */
  
  #include <complex.h>
  #include <fenv.h>
  #include <math.h>
  #include <math_private.h>
  #include <float.h>
  
  __complex__ double
  __ccosh (__complex__ double x)
  {
    __complex__ double retval;
    int rcls = fpclassify (__real__ x);
    int icls = fpclassify (__imag__ x);
  
    if (__builtin_expect (rcls >= FP_ZERO, 1))
      {
        /* Real part is finite.  */
        if (__builtin_expect (icls >= FP_ZERO, 1))
  	{
  	  /* Imaginary part is finite.  */
  	  const int t = (int) ((DBL_MAX_EXP - 1) * M_LN2);
  	  double sinix, cosix;
  
  	  __sincos (__imag__ x, &sinix, &cosix);
  
  	  if (fabs (__real__ x) > t)
  	    {
  	      double exp_t = __ieee754_exp (t);
  	      double rx = fabs (__real__ x);
  	      if (signbit (__real__ x))
  		sinix = -sinix;
  	      rx -= t;
  	      sinix *= exp_t / 2.0;
  	      cosix *= exp_t / 2.0;
  	      if (rx > t)
  		{
  		  rx -= t;
  		  sinix *= exp_t;
  		  cosix *= exp_t;
  		}
  	      if (rx > t)
  		{
  		  /* Overflow (original real part of x > 3t).  */
  		  __real__ retval = DBL_MAX * cosix;
  		  __imag__ retval = DBL_MAX * sinix;
  		}
  	      else
  		{
  		  double exp_val = __ieee754_exp (rx);
  		  __real__ retval = exp_val * cosix;
  		  __imag__ retval = exp_val * sinix;
  		}
  	    }
  	  else
  	    {
  	      __real__ retval = __ieee754_cosh (__real__ x) * cosix;
  	      __imag__ retval = __ieee754_sinh (__real__ x) * sinix;
  	    }
  	}
        else
  	{
  	  __imag__ retval = __real__ x == 0.0 ? 0.0 : __nan ("");
  	  __real__ retval = __nan ("") + __nan ("");
  
  	  if (icls == FP_INFINITE)
  	    feraiseexcept (FE_INVALID);
  	}
      }
    else if (rcls == FP_INFINITE)
      {
        /* Real part is infinite.  */
        if (__builtin_expect (icls > FP_ZERO, 1))
  	{
  	  /* Imaginary part is finite.  */
  	  double sinix, cosix;
  
  	  __sincos (__imag__ x, &sinix, &cosix);
  
  	  __real__ retval = __copysign (HUGE_VAL, cosix);
  	  __imag__ retval = (__copysign (HUGE_VAL, sinix)
  			     * __copysign (1.0, __real__ x));
  	}
        else if (icls == FP_ZERO)
  	{
  	  /* Imaginary part is 0.0.  */
  	  __real__ retval = HUGE_VAL;
  	  __imag__ retval = __imag__ x * __copysign (1.0, __real__ x);
  	}
        else
  	{
  	  /* The addition raises the invalid exception.  */
  	  __real__ retval = HUGE_VAL;
  	  __imag__ retval = __nan ("") + __nan ("");
  
  	  if (icls == FP_INFINITE)
  	    feraiseexcept (FE_INVALID);
  	}
      }
    else
      {
        __real__ retval = __nan ("");
        __imag__ retval = __imag__ x == 0.0 ? __imag__ x : __nan ("");
      }
  
    return retval;
  }
  weak_alias (__ccosh, ccosh)
  #ifdef NO_LONG_DOUBLE
  strong_alias (__ccosh, __ccoshl)
  weak_alias (__ccosh, ccoshl)
  #endif
  