Source to libkern/negdi2.c
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* SUCH DAMAGE.
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid = "@(#)negdi2.c 8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
* Return -a (or, equivalently, 0 - a), in quad. See subdi3.c.
union uu aa, res;
aa.q = a;
res.ul[L] = -aa.ul[L];
res.ul[H] = -aa.ul[H] - (res.ul[L] > 0);