1 /* Compute remainder and a congruent to the quotient.
2 Copyright (C) 1997 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Library General Public License as
8 published by the Free Software Foundation; either version 2 of the
9 License, or (at your option) any later version.
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 Library General Public License for more details.
16 You should have received a copy of the GNU Library General Public
17 License along with the GNU C Library; see the file COPYING.LIB. If not,
18 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
23 #include "math_private.h"
26 static const double zero
= 0.0;
30 __remquo (double x
, double y
, int *quo
)
36 EXTRACT_WORDS (hx
, lx
, x
);
37 EXTRACT_WORDS (hy
, ly
, y
);
39 qs
= sx
^ (hy
& 0x80000000);
43 /* Purge off exception values. */
45 return (x
* y
) / (x
* y
); /* y = 0 */
46 if ((hx
>= 0x7ff00000) /* x not finite */
47 || ((hy
>= 0x7ff00000) /* p is NaN */
48 && (((hy
- 0x7ff00000) | ly
) != 0)))
49 return (x
* y
) / (x
* y
);
52 x
= __ieee754_fmod (x
, 8 * y
); /* now x < 8y */
54 if (((hx
- hy
) | (lx
- ly
)) == 0)
90 double y_half
= 0.5 * y
;
103 *quo
= qs
? -cquo
: cquo
;
109 weak_alias (__remquo
, remquo
)
110 #ifdef NO_LONG_DOUBLE
111 strong_alias (__remquo
, __remquol
)
112 weak_alias (__remquo
, remquol
)