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- /* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, write to the Free Software Foundation, Inc., 675 Mass Ave,
- Cambridge, MA 02139, USA. */
-
- #include <ansidecl.h>
- #include <math.h>
- #include "ieee754.h"
-
- /* Return X with its signed changed to Y's. */
- __CONSTVALUE double
- DEFUN(__copysign, (x, y), double x AND double y)
- {
- union ieee754_double ux, uy;
-
- ux.d = x;
- uy.d = y;
-
- ux.ieee.negative = uy.ieee.negative;
-
- return ux.d;
- }
-