mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 13:00:06 +00:00
04277e02d7
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
95 lines
2.3 KiB
C
95 lines
2.3 KiB
C
/* Return arc hyperbolic cosine for a complex type.
|
|
Copyright (C) 1997-2019 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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <complex.h>
|
|
#include <math.h>
|
|
|
|
|
|
CFLOAT
|
|
M_DECL_FUNC (__cacosh) (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_HUGE_VAL;
|
|
|
|
if (rcls == FP_NAN)
|
|
__imag__ res = M_NAN;
|
|
else
|
|
__imag__ res = M_COPYSIGN ((rcls == FP_INFINITE
|
|
? (__real__ x < 0
|
|
? M_MLIT (M_PI) - M_MLIT (M_PI_4)
|
|
: M_MLIT (M_PI_4))
|
|
: M_MLIT (M_PI_2)), __imag__ x);
|
|
}
|
|
else if (rcls == FP_INFINITE)
|
|
{
|
|
__real__ res = M_HUGE_VAL;
|
|
|
|
if (icls >= FP_ZERO)
|
|
__imag__ res = M_COPYSIGN (signbit (__real__ x)
|
|
? M_MLIT (M_PI) : 0, __imag__ x);
|
|
else
|
|
__imag__ res = M_NAN;
|
|
}
|
|
else
|
|
{
|
|
__real__ res = M_NAN;
|
|
if (rcls == FP_ZERO)
|
|
__imag__ res = M_MLIT (M_PI_2);
|
|
else
|
|
__imag__ res = M_NAN;
|
|
}
|
|
}
|
|
else if (rcls == FP_ZERO && icls == FP_ZERO)
|
|
{
|
|
__real__ res = 0;
|
|
__imag__ res = M_COPYSIGN (M_MLIT (M_PI_2), __imag__ x);
|
|
}
|
|
else
|
|
{
|
|
CFLOAT y;
|
|
|
|
__real__ y = -__imag__ x;
|
|
__imag__ y = __real__ x;
|
|
|
|
y = M_SUF (__kernel_casinh) (y, 1);
|
|
|
|
if (signbit (__imag__ x))
|
|
{
|
|
__real__ res = __real__ y;
|
|
__imag__ res = -__imag__ y;
|
|
}
|
|
else
|
|
{
|
|
__real__ res = -__real__ y;
|
|
__imag__ res = __imag__ y;
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
declare_mgen_alias (__cacosh, cacosh)
|