1  /* Return arc hyperbolic sine for a complex float type.
       2     Copyright (C) 1997-2018 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4     Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
       5  
       6     The GNU C Library is free software; you can redistribute it and/or
       7     modify it under the terms of the GNU Lesser General Public
       8     License as published by the Free Software Foundation; either
       9     version 2.1 of the License, or (at your option) any later version.
      10  
      11     The GNU C Library is distributed in the hope that it will be useful,
      12     but WITHOUT ANY WARRANTY; without even the implied warranty of
      13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14     Lesser General Public License for more details.
      15  
      16     You should have received a copy of the GNU Lesser General Public
      17     License along with the GNU C Library; if not, see
      18     <http://www.gnu.org/licenses/>.  */
      19  
      20  #include "quadmath-imp.h"
      21  
      22  __complex128
      23  casinhq (__complex128 x)
      24  {
      25    __complex128 res;
      26    int rcls = fpclassifyq (__real__ x);
      27    int icls = fpclassifyq (__imag__ x);
      28  
      29    if (rcls <= QUADFP_INFINITE || icls <= QUADFP_INFINITE)
      30      {
      31        if (icls == QUADFP_INFINITE)
      32  	{
      33  	  __real__ res = copysignq (HUGE_VALQ, __real__ x);
      34  
      35  	  if (rcls == QUADFP_NAN)
      36  	    __imag__ res = nanq ("");
      37  	  else
      38  	    __imag__ res = copysignq ((rcls >= QUADFP_ZERO
      39  				        ? M_PI_2q : M_PI_4q),
      40  				       __imag__ x);
      41  	}
      42        else if (rcls <= QUADFP_INFINITE)
      43  	{
      44  	  __real__ res = __real__ x;
      45  	  if ((rcls == QUADFP_INFINITE && icls >= QUADFP_ZERO)
      46  	      || (rcls == QUADFP_NAN && icls == QUADFP_ZERO))
      47  	    __imag__ res = copysignq (0, __imag__ x);
      48  	  else
      49  	    __imag__ res = nanq ("");
      50  	}
      51        else
      52  	{
      53  	  __real__ res = nanq ("");
      54  	  __imag__ res = nanq ("");
      55  	}
      56      }
      57    else if (rcls == QUADFP_ZERO && icls == QUADFP_ZERO)
      58      {
      59        res = x;
      60      }
      61    else
      62      {
      63        res = __quadmath_kernel_casinhq (x, 0);
      64      }
      65  
      66    return res;
      67  }