text: /* Complex cosine hyperbolic function for float types.
     Copyright (C) 1997-2020 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
     <https://www.gnu.org/licenses/>.  */
  
  #include <complex.h>
  #include <fenv.h>
  #include <math.h>
  #include <math_private.h>
  #include <math-underflow.h>
  #include <float.h>
  
  CFLOAT
  M_DECL_FUNC (__ccosh) (CFLOAT x)
  {
    CFLOAT retval;
    int rcls = fpclassify (__real__ x);
    int icls = fpclassify (__imag__ x);
  
    if (__glibc_likely (rcls >= FP_ZERO))
      {
        /* Real part is finite.  */
        if (__glibc_likely (icls >= FP_ZERO))
  	{
  	  /* Imaginary part is finite.  */
  	  const int t = (int) ((M_MAX_EXP - 1) * M_MLIT (M_LN2));
  	  FLOAT sinix, cosix;
  
  	  if (__glibc_likely (M_FABS (__imag__ x) > M_MIN))
  	    {
  	      M_SINCOS (__imag__ x, &sinix, &cosix);
  	    }
  	  else
  	    {
  	      sinix = __imag__ x;
  	      cosix = 1;
  	    }
  
  	  if (M_FABS (__real__ x) > t)
  	    {
  	      FLOAT exp_t = M_EXP (t);
  	      FLOAT rx = M_FABS (__real__ x);
  	      if (signbit (__real__ x))
  		sinix = -sinix;
  	      rx -= t;
  	      sinix *= exp_t / 2;
  	      cosix *= exp_t / 2;
  	      if (rx > t)
  		{
  		  rx -= t;
  		  sinix *= exp_t;
  		  cosix *= exp_t;
  		}
  	      if (rx > t)
  		{
  		  /* Overflow (original real part of x > 3t).  */
  		  __real__ retval = M_MAX * cosix;
  		  __imag__ retval = M_MAX * sinix;
  		}
  	      else
  		{
  		  FLOAT exp_val = M_EXP (rx);
  		  __real__ retval = exp_val * cosix;
  		  __imag__ retval = exp_val * sinix;
  		}
  	    }
  	  else
  	    {
  	      __real__ retval = M_COSH (__real__ x) * cosix;
  	      __imag__ retval = M_SINH (__real__ x) * sinix;
  	    }
  
  	  math_check_force_underflow_complex (retval);
  	}
        else
  	{
  	  __imag__ retval = __real__ x == 0 ? 0 : M_NAN;
  	  __real__ retval = __imag__ x - __imag__ x;
  	}
      }
    else if (rcls == FP_INFINITE)
      {
        /* Real part is infinite.  */
        if (__glibc_likely (icls > FP_ZERO))
  	{
  	  /* Imaginary part is finite.  */
  	  FLOAT sinix, cosix;
  
  	  if (__glibc_likely (M_FABS (__imag__ x) > M_MIN))
  	    {
  	      M_SINCOS (__imag__ x, &sinix, &cosix);
  	    }
  	  else
  	    {
  	      sinix = __imag__ x;
  	      cosix = 1;
  	    }
  
  	  __real__ retval = M_COPYSIGN (M_HUGE_VAL, cosix);
  	  __imag__ retval = (M_COPYSIGN (M_HUGE_VAL, sinix)
  			     * M_COPYSIGN (1, __real__ x));
  	}
        else if (icls == FP_ZERO)
  	{
  	  /* Imaginary part is 0.0.  */
  	  __real__ retval = M_HUGE_VAL;
  	  __imag__ retval = __imag__ x * M_COPYSIGN (1, __real__ x);
  	}
        else
  	{
  	  __real__ retval = M_HUGE_VAL;
  	  __imag__ retval = __imag__ x - __imag__ x;
  	}
      }
    else
      {
        __real__ retval = M_NAN;
        __imag__ retval = __imag__ x == 0 ? __imag__ x : M_NAN;
      }
  
    return retval;
  }
  
  declare_mgen_alias (__ccosh, ccosh);
  