mirror of git://gcc.gnu.org/git/gcc.git
91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
/* Return arc hyperbolic cosine for a complex type.
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Copyright (C) 1997-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include "quadmath-imp.h"
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__complex128
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cacoshq (__complex128 x)
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{
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__complex128 res;
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int rcls = fpclassifyq (__real__ x);
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int icls = fpclassifyq (__imag__ x);
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if (rcls <= QUADFP_INFINITE || icls <= QUADFP_INFINITE)
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{
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if (icls == QUADFP_INFINITE)
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{
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__real__ res = HUGE_VALQ;
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if (rcls == QUADFP_NAN)
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__imag__ res = nanq ("");
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else
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__imag__ res = copysignq ((rcls == QUADFP_INFINITE
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? (__real__ x < 0
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? M_PIq - M_PI_4q
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: M_PI_4q)
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: M_PI_2q), __imag__ x);
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}
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else if (rcls == QUADFP_INFINITE)
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{
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__real__ res = HUGE_VALQ;
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if (icls >= QUADFP_ZERO)
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__imag__ res = copysignq (signbitq (__real__ x)
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? M_PIq : 0, __imag__ x);
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else
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__imag__ res = nanq ("");
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}
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else
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{
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__real__ res = nanq ("");
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if (rcls == QUADFP_ZERO)
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__imag__ res = M_PI_2q;
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else
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__imag__ res = nanq ("");
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}
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}
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else if (rcls == QUADFP_ZERO && icls == QUADFP_ZERO)
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{
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__real__ res = 0;
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__imag__ res = copysignq (M_PI_2q, __imag__ x);
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}
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else
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{
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__complex128 y;
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__real__ y = -__imag__ x;
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__imag__ y = __real__ x;
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y = __quadmath_kernel_casinhq (y, 1);
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if (signbitq (__imag__ x))
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{
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__real__ res = __real__ y;
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__imag__ res = -__imag__ y;
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}
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else
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{
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__real__ res = -__real__ y;
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__imag__ res = __imag__ y;
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}
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}
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return res;
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}
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