41 lines
1.3 KiB
C
41 lines
1.3 KiB
C
|
/* Compute projection of complex __float128 value to Riemann sphere.
|
||
|
|
Copyright (C) 1997, 1999, 2010 Free Software Foundation, Inc.
|
||
|
|
This file is part of the GNU C Library.
|
||
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
|
||
|
|
|
||
|
|
The GNU C Library is free software; you can redistribute it and/or
|
||
|
|
modify it under the terms of the GNU Lesser General Public
|
||
|
|
License as published by the Free Software Foundation; either
|
||
|
|
version 2.1 of the License, or (at your option) any later version.
|
||
|
|
|
||
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
Lesser General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Lesser General Public
|
||
|
|
License along with the GNU C Library; if not, write to the Free
|
||
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
||
|
|
02111-1307 USA. */
|
||
|
|
|
||
|
|
#include "quadmath-imp.h"
|
||
|
|
|
||
|
|
|
||
|
|
__complex128
|
||
|
|
cprojq (__complex128 x)
|
||
|
|
{
|
||
|
|
if (isnanq (__real__ x) && isnanq (__imag__ x))
|
||
|
|
return x;
|
||
|
|
else if (!finiteq (__real__ x) || !finiteq (__imag__ x))
|
||
|
|
{
|
||
|
|
__complex128 res;
|
||
|
|
|
||
|
|
__real__ res = __builtin_inf ();
|
||
|
|
__imag__ res = copysignq (0.0, __imag__ x);
|
||
|
|
|
||
|
|
return res;
|
||
|
|
}
|
||
|
|
|
||
|
|
return x;
|
||
|
|
}
|