1*181254a7Smrg /* Return arc hyperbolic cosine for a complex type. 2*181254a7Smrg Copyright (C) 1997-2018 Free Software Foundation, Inc. 3*181254a7Smrg This file is part of the GNU C Library. 4*181254a7Smrg Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. 5*181254a7Smrg 6*181254a7Smrg The GNU C Library is free software; you can redistribute it and/or 7*181254a7Smrg modify it under the terms of the GNU Lesser General Public 8*181254a7Smrg License as published by the Free Software Foundation; either 9*181254a7Smrg version 2.1 of the License, or (at your option) any later version. 10*181254a7Smrg 11*181254a7Smrg The GNU C Library is distributed in the hope that it will be useful, 12*181254a7Smrg but WITHOUT ANY WARRANTY; without even the implied warranty of 13*181254a7Smrg MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14*181254a7Smrg Lesser General Public License for more details. 15*181254a7Smrg 16*181254a7Smrg You should have received a copy of the GNU Lesser General Public 17*181254a7Smrg License along with the GNU C Library; if not, see 18*181254a7Smrg <http://www.gnu.org/licenses/>. */ 19*181254a7Smrg 20*181254a7Smrg #include "quadmath-imp.h" 21*181254a7Smrg 22*181254a7Smrg __complex128 cacoshq(__complex128 x)23*181254a7Smrgcacoshq (__complex128 x) 24*181254a7Smrg { 25*181254a7Smrg __complex128 res; 26*181254a7Smrg int rcls = fpclassifyq (__real__ x); 27*181254a7Smrg int icls = fpclassifyq (__imag__ x); 28*181254a7Smrg 29*181254a7Smrg if (rcls <= QUADFP_INFINITE || icls <= QUADFP_INFINITE) 30*181254a7Smrg { 31*181254a7Smrg if (icls == QUADFP_INFINITE) 32*181254a7Smrg { 33*181254a7Smrg __real__ res = HUGE_VALQ; 34*181254a7Smrg 35*181254a7Smrg if (rcls == QUADFP_NAN) 36*181254a7Smrg __imag__ res = nanq (""); 37*181254a7Smrg else 38*181254a7Smrg __imag__ res = copysignq ((rcls == QUADFP_INFINITE 39*181254a7Smrg ? (__real__ x < 0 40*181254a7Smrg ? M_PIq - M_PI_4q 41*181254a7Smrg : M_PI_4q) 42*181254a7Smrg : M_PI_2q), __imag__ x); 43*181254a7Smrg } 44*181254a7Smrg else if (rcls == QUADFP_INFINITE) 45*181254a7Smrg { 46*181254a7Smrg __real__ res = HUGE_VALQ; 47*181254a7Smrg 48*181254a7Smrg if (icls >= QUADFP_ZERO) 49*181254a7Smrg __imag__ res = copysignq (signbitq (__real__ x) 50*181254a7Smrg ? M_PIq : 0, __imag__ x); 51*181254a7Smrg else 52*181254a7Smrg __imag__ res = nanq (""); 53*181254a7Smrg } 54*181254a7Smrg else 55*181254a7Smrg { 56*181254a7Smrg __real__ res = nanq (""); 57*181254a7Smrg if (rcls == QUADFP_ZERO) 58*181254a7Smrg __imag__ res = M_PI_2q; 59*181254a7Smrg else 60*181254a7Smrg __imag__ res = nanq (""); 61*181254a7Smrg } 62*181254a7Smrg } 63*181254a7Smrg else if (rcls == QUADFP_ZERO && icls == QUADFP_ZERO) 64*181254a7Smrg { 65*181254a7Smrg __real__ res = 0; 66*181254a7Smrg __imag__ res = copysignq (M_PI_2q, __imag__ x); 67*181254a7Smrg } 68*181254a7Smrg else 69*181254a7Smrg { 70*181254a7Smrg __complex128 y; 71*181254a7Smrg 72*181254a7Smrg __real__ y = -__imag__ x; 73*181254a7Smrg __imag__ y = __real__ x; 74*181254a7Smrg 75*181254a7Smrg y = __quadmath_kernel_casinhq (y, 1); 76*181254a7Smrg 77*181254a7Smrg if (signbitq (__imag__ x)) 78*181254a7Smrg { 79*181254a7Smrg __real__ res = __real__ y; 80*181254a7Smrg __imag__ res = -__imag__ y; 81*181254a7Smrg } 82*181254a7Smrg else 83*181254a7Smrg { 84*181254a7Smrg __real__ res = -__real__ y; 85*181254a7Smrg __imag__ res = __imag__ y; 86*181254a7Smrg } 87*181254a7Smrg } 88*181254a7Smrg 89*181254a7Smrg return res; 90*181254a7Smrg } 91