Source to libkern/moddi3.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
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid = "@(#)moddi3.c 8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
* Return remainder after dividing two signed quads.
* If -1/2 should produce -1 on this machine, this code is wrong.
quad_t a, b;
u_quad_t ua, ub, ur;
if (a < 0)
ua = -(u_quad_t)a, neg = 1;
ua = a, neg = 0;
if (b < 0)
ub = -(u_quad_t)b, neg ^= 1;
ub = b;
(void)__qdivrem(ua, ub, &ur);
return (neg ? -ur : ur);