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- /* Return arc hyperbolic sine for a complex float type.
- Copyright (C) 1997-2018 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 "quadmath-imp.h"
- __complex128
- casinhq (__complex128 x)
- {
- __complex128 res;
- int rcls = fpclassifyq (__real__ x);
- int icls = fpclassifyq (__imag__ x);
- if (rcls <= QUADFP_INFINITE || icls <= QUADFP_INFINITE)
- {
- if (icls == QUADFP_INFINITE)
- {
- __real__ res = copysignq (HUGE_VALQ, __real__ x);
- if (rcls == QUADFP_NAN)
- __imag__ res = nanq ("");
- else
- __imag__ res = copysignq ((rcls >= QUADFP_ZERO
- ? M_PI_2q : M_PI_4q),
- __imag__ x);
- }
- else if (rcls <= QUADFP_INFINITE)
- {
- __real__ res = __real__ x;
- if ((rcls == QUADFP_INFINITE && icls >= QUADFP_ZERO)
- || (rcls == QUADFP_NAN && icls == QUADFP_ZERO))
- __imag__ res = copysignq (0, __imag__ x);
- else
- __imag__ res = nanq ("");
- }
- else
- {
- __real__ res = nanq ("");
- __imag__ res = nanq ("");
- }
- }
- else if (rcls == QUADFP_ZERO && icls == QUADFP_ZERO)
- {
- res = x;
- }
- else
- {
- res = __quadmath_kernel_casinhq (x, 0);
- }
- return res;
- }
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