KNF, integrate with standard include files (quad -> quad_t etc.)

[unix-history] / usr / src / lib / libc / quad / divdi3.c

/*-
 * Copyright (c) 1992 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.
 *
 * %sccs.include.redist.c%
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)divdi3.c	5.4 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */

#include "quad.h"

/*
 * Divide two signed quads.
 * ??? if -1/2 should produce -1 on this machine, this code is wrong
 */
quad_t
__divdi3(a, b)
	quad_t a, b;
{
	u_quad_t ua, ub, uq;
	int neg;

	if (a < 0)
		ua = -(u_quad_t)a, neg = 1;
	else
		ua = a, neg = 0;
	if (b < 0)
		ub = -(u_quad_t)b, neg ^= 1;
	else
		ub = b;
	uq = __qdivrem(ua, ub, (u_quad_t *)0);
	return (neg ? -uq : uq);
}