1*81418a27Smrg /* Compute projection of complex float type value to Riemann sphere. 2*81418a27Smrg Copyright (C) 1997-2018 Free Software Foundation, Inc. 3*81418a27Smrg This file is part of the GNU C Library. 4*81418a27Smrg Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. 5*81418a27Smrg 6*81418a27Smrg The GNU C Library is free software; you can redistribute it and/or 7*81418a27Smrg modify it under the terms of the GNU Lesser General Public 8*81418a27Smrg License as published by the Free Software Foundation; either 9*81418a27Smrg version 2.1 of the License, or (at your option) any later version. 10*81418a27Smrg 11*81418a27Smrg The GNU C Library is distributed in the hope that it will be useful, 12*81418a27Smrg but WITHOUT ANY WARRANTY; without even the implied warranty of 13*81418a27Smrg MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14*81418a27Smrg Lesser General Public License for more details. 15*81418a27Smrg 16*81418a27Smrg You should have received a copy of the GNU Lesser General Public 17*81418a27Smrg License along with the GNU C Library; if not, see 18*81418a27Smrg <http://www.gnu.org/licenses/>. */ 19*81418a27Smrg 20*81418a27Smrg #include "quadmath-imp.h" 21*81418a27Smrg 22*81418a27Smrg __complex128 cprojq(__complex128 x)23*81418a27Smrgcprojq (__complex128 x) 24*81418a27Smrg { 25*81418a27Smrg if (isinfq (__real__ x) || isinfq (__imag__ x)) 26*81418a27Smrg { 27*81418a27Smrg __complex128 res; 28*81418a27Smrg 29*81418a27Smrg __real__ res = __builtin_inf (); 30*81418a27Smrg __imag__ res = copysignq (0, __imag__ x); 31*81418a27Smrg 32*81418a27Smrg return res; 33*81418a27Smrg } 34*81418a27Smrg 35*81418a27Smrg return x; 36*81418a27Smrg } 37