1*627f7eb2Smrg /* Return arc hyperbolic cosine for a complex type. 2*627f7eb2Smrg Copyright (C) 1997-2018 Free Software Foundation, Inc. 3*627f7eb2Smrg This file is part of the GNU C Library. 4*627f7eb2Smrg Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. 5*627f7eb2Smrg 6*627f7eb2Smrg The GNU C Library is free software; you can redistribute it and/or 7*627f7eb2Smrg modify it under the terms of the GNU Lesser General Public 8*627f7eb2Smrg License as published by the Free Software Foundation; either 9*627f7eb2Smrg version 2.1 of the License, or (at your option) any later version. 10*627f7eb2Smrg 11*627f7eb2Smrg The GNU C Library is distributed in the hope that it will be useful, 12*627f7eb2Smrg but WITHOUT ANY WARRANTY; without even the implied warranty of 13*627f7eb2Smrg MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14*627f7eb2Smrg Lesser General Public License for more details. 15*627f7eb2Smrg 16*627f7eb2Smrg You should have received a copy of the GNU Lesser General Public 17*627f7eb2Smrg License along with the GNU C Library; if not, see 18*627f7eb2Smrg <http://www.gnu.org/licenses/>. */ 19*627f7eb2Smrg 20*627f7eb2Smrg #include "quadmath-imp.h" 21*627f7eb2Smrg 22*627f7eb2Smrg __complex128 cacoshq(__complex128 x)23*627f7eb2Smrgcacoshq (__complex128 x) 24*627f7eb2Smrg { 25*627f7eb2Smrg __complex128 res; 26*627f7eb2Smrg int rcls = fpclassifyq (__real__ x); 27*627f7eb2Smrg int icls = fpclassifyq (__imag__ x); 28*627f7eb2Smrg 29*627f7eb2Smrg if (rcls <= QUADFP_INFINITE || icls <= QUADFP_INFINITE) 30*627f7eb2Smrg { 31*627f7eb2Smrg if (icls == QUADFP_INFINITE) 32*627f7eb2Smrg { 33*627f7eb2Smrg __real__ res = HUGE_VALQ; 34*627f7eb2Smrg 35*627f7eb2Smrg if (rcls == QUADFP_NAN) 36*627f7eb2Smrg __imag__ res = nanq (""); 37*627f7eb2Smrg else 38*627f7eb2Smrg __imag__ res = copysignq ((rcls == QUADFP_INFINITE 39*627f7eb2Smrg ? (__real__ x < 0 40*627f7eb2Smrg ? M_PIq - M_PI_4q 41*627f7eb2Smrg : M_PI_4q) 42*627f7eb2Smrg : M_PI_2q), __imag__ x); 43*627f7eb2Smrg } 44*627f7eb2Smrg else if (rcls == QUADFP_INFINITE) 45*627f7eb2Smrg { 46*627f7eb2Smrg __real__ res = HUGE_VALQ; 47*627f7eb2Smrg 48*627f7eb2Smrg if (icls >= QUADFP_ZERO) 49*627f7eb2Smrg __imag__ res = copysignq (signbitq (__real__ x) 50*627f7eb2Smrg ? M_PIq : 0, __imag__ x); 51*627f7eb2Smrg else 52*627f7eb2Smrg __imag__ res = nanq (""); 53*627f7eb2Smrg } 54*627f7eb2Smrg else 55*627f7eb2Smrg { 56*627f7eb2Smrg __real__ res = nanq (""); 57*627f7eb2Smrg if (rcls == QUADFP_ZERO) 58*627f7eb2Smrg __imag__ res = M_PI_2q; 59*627f7eb2Smrg else 60*627f7eb2Smrg __imag__ res = nanq (""); 61*627f7eb2Smrg } 62*627f7eb2Smrg } 63*627f7eb2Smrg else if (rcls == QUADFP_ZERO && icls == QUADFP_ZERO) 64*627f7eb2Smrg { 65*627f7eb2Smrg __real__ res = 0; 66*627f7eb2Smrg __imag__ res = copysignq (M_PI_2q, __imag__ x); 67*627f7eb2Smrg } 68*627f7eb2Smrg else 69*627f7eb2Smrg { 70*627f7eb2Smrg __complex128 y; 71*627f7eb2Smrg 72*627f7eb2Smrg __real__ y = -__imag__ x; 73*627f7eb2Smrg __imag__ y = __real__ x; 74*627f7eb2Smrg 75*627f7eb2Smrg y = __quadmath_kernel_casinhq (y, 1); 76*627f7eb2Smrg 77*627f7eb2Smrg if (signbitq (__imag__ x)) 78*627f7eb2Smrg { 79*627f7eb2Smrg __real__ res = __real__ y; 80*627f7eb2Smrg __imag__ res = -__imag__ y; 81*627f7eb2Smrg } 82*627f7eb2Smrg else 83*627f7eb2Smrg { 84*627f7eb2Smrg __real__ res = -__real__ y; 85*627f7eb2Smrg __imag__ res = __imag__ y; 86*627f7eb2Smrg } 87*627f7eb2Smrg } 88*627f7eb2Smrg 89*627f7eb2Smrg return res; 90*627f7eb2Smrg } 91