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/* Return arc hyperbolic sine for a complex float type.
Copyright (C) 1997-2021 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)
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