1*627f7eb2Smrg /* Compute projection of complex float type value to Riemann sphere. 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 cprojq(__complex128 x)23*627f7eb2Smrgcprojq (__complex128 x) 24*627f7eb2Smrg { 25*627f7eb2Smrg if (isinfq (__real__ x) || isinfq (__imag__ x)) 26*627f7eb2Smrg { 27*627f7eb2Smrg __complex128 res; 28*627f7eb2Smrg 29*627f7eb2Smrg __real__ res = __builtin_inf (); 30*627f7eb2Smrg __imag__ res = copysignq (0, __imag__ x); 31*627f7eb2Smrg 32*627f7eb2Smrg return res; 33*627f7eb2Smrg } 34*627f7eb2Smrg 35*627f7eb2Smrg return x; 36*627f7eb2Smrg } 37