1 /* Compute projection of complex __float128 value to Riemann sphere.
2 Copyright (C) 1997, 1999, 2010 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 02111-1307 USA. */
20
21 #include "quadmath-imp.h"
22
23
24 __complex128
cprojq(__complex128 x)25 cprojq (__complex128 x)
26 {
27 if (isnanq (__real__ x) && isnanq (__imag__ x))
28 return x;
29 else if (!finiteq (__real__ x) || !finiteq (__imag__ x))
30 {
31 __complex128 res;
32
33 __real__ res = __builtin_inf ();
34 __imag__ res = copysignq (0.0, __imag__ x);
35
36 return res;
37 }
38
39 return x;
40 }
41