1  /* Complex cosine hyperbole function.  m68k fpu version
       2     Copyright (C) 1997-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library.  If not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <complex.h>
      20  #include <math.h>
      21  #include "mathimpl.h"
      22  
      23  #define s(name) M_SUF (name)
      24  #define m81(func) __m81_u(s(func))
      25  
      26  CFLOAT
      27  s(__ccosh) (CFLOAT x)
      28  {
      29    CFLOAT retval;
      30    unsigned long ix_cond = __m81_test (__imag__ x);
      31  
      32    if ((ix_cond & (__M81_COND_INF|__M81_COND_NAN)) == 0)
      33      {
      34        /* Imaginary part is finite.  */
      35        FLOAT sin_ix, cos_ix;
      36  
      37        __asm ("fsincos%.x %2,%1:%0" : "=f" (sin_ix), "=f" (cos_ix)
      38  	     : "f" (__imag__ x));
      39        __real__ retval = cos_ix * m81(__ieee754_cosh) (__real__ x);
      40        if (ix_cond & __M81_COND_ZERO)
      41  	__imag__ retval = (signbit (__real__ x)
      42  			   ? -__imag__ x : __imag__ x);
      43        else
      44  	__imag__ retval = sin_ix * m81(__ieee754_sinh) (__real__ x);
      45      }
      46    else
      47      {
      48        unsigned long rx_cond = __m81_test (__real__ x);
      49  
      50        if (rx_cond & __M81_COND_ZERO)
      51  	{
      52  	  __real__ retval = __imag__ x - __imag__ x;
      53  	  __imag__ retval = __real__ x;
      54  	}
      55        else
      56  	{
      57  	  if (rx_cond & __M81_COND_INF)
      58  	    __real__ retval = s(fabs) (__real__ x);
      59  	  else
      60  	    __real__ retval = s(__nan) ("");
      61  	  __imag__ retval = __imag__ x - __imag__ x;
      62  	}
      63      }
      64  
      65    return retval;
      66  }
      67  declare_mgen_alias (__ccosh, ccosh)