[thirdparty/glibc.git] / math / s_casinh_template.c

/* Return arc hyperbolic sine for a complex float type.
   Copyright (C) 1997-2025 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   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 <math.h>

CFLOAT
M_DECL_FUNC (__casinh) (CFLOAT x)
{
  CFLOAT res;
  int rcls = fpclassify (__real__ x);
  int icls = fpclassify (__imag__ x);

  if (rcls <= FP_INFINITE || icls <= FP_INFINITE)
    {
      if (icls == FP_INFINITE)
	{
	  __real__ res = M_COPYSIGN (M_HUGE_VAL, __real__ x);

	  if (rcls == FP_NAN)
	    __imag__ res = M_NAN;
	  else
	    __imag__ res = M_COPYSIGN ((rcls >= FP_ZERO
				        ? M_MLIT (M_PI_2) : M_MLIT (M_PI_4)),
				       __imag__ x);
	}
      else if (rcls <= FP_INFINITE)
	{
	  __real__ res = __real__ x;
	  if ((rcls == FP_INFINITE && icls >= FP_ZERO)
	      || (rcls == FP_NAN && icls == FP_ZERO))
	    __imag__ res = M_COPYSIGN (0, __imag__ x);
	  else
	    __imag__ res = M_NAN;
	}
      else
	{
	  __real__ res = M_NAN;
	  __imag__ res = M_NAN;
	}
    }
  else if (rcls == FP_ZERO && icls == FP_ZERO)
    {
      res = x;
    }
  else
    {
      res = M_SUF (__kernel_casinh) (x, 0);
    }

  return res;
}

declare_mgen_alias (__casinh, casinh)
Commit	Line	Data
	1	/* Return arc hyperbolic sine for a complex float type.
	2	Copyright (C) 1997-2025 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
	22	CFLOAT
	23	M_DECL_FUNC (__casinh) (CFLOAT x)
	24	{
	25	CFLOAT res;
	26	int rcls = fpclassify (__real__ x);
	27	int icls = fpclassify (__imag__ x);
	28
	29	if (rcls <= FP_INFINITE \|\| icls <= FP_INFINITE)
	30	{
	31	if (icls == FP_INFINITE)
	32	{
	33	__real__ res = M_COPYSIGN (M_HUGE_VAL, __real__ x);
	34
	35	if (rcls == FP_NAN)
	36	__imag__ res = M_NAN;
	37	else
	38	__imag__ res = M_COPYSIGN ((rcls >= FP_ZERO
	39	? M_MLIT (M_PI_2) : M_MLIT (M_PI_4)),
	40	__imag__ x);
	41	}
	42	else if (rcls <= FP_INFINITE)
	43	{
	44	__real__ res = __real__ x;
	45	if ((rcls == FP_INFINITE && icls >= FP_ZERO)
	46	\|\| (rcls == FP_NAN && icls == FP_ZERO))
	47	__imag__ res = M_COPYSIGN (0, __imag__ x);
	48	else
	49	__imag__ res = M_NAN;
	50	}
	51	else
	52	{
	53	__real__ res = M_NAN;
	54	__imag__ res = M_NAN;
	55	}
	56	}
	57	else if (rcls == FP_ZERO && icls == FP_ZERO)
	58	{
	59	res = x;
	60	}
	61	else
	62	{
	63	res = M_SUF (__kernel_casinh) (x, 0);
	64	}
	65
	66	return res;
	67	}
	68
	69	declare_mgen_alias (__casinh, casinh)