math64.h revision 302408 
1/*-
2 * Copyright (c) 2007 Cisco Systems, Inc.  All rights reserved.
3 * Copyright (c) 2014-2015 Mellanox Technologies, Ltd. All rights reserved.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice unmodified, this list of conditions, and the following
11 *    disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 * $FreeBSD: stable/11/sys/compat/linuxkpi/common/include/linux/math64.h 290135 2015-10-29 08:28:39Z hselasky $
28 */
29#ifndef _LINUX_MATH64_H
30#define	_LINUX_MATH64_H
31
32#include <sys/stdint.h>
33
34#define	do_div(n, base) ({			\
35	uint32_t __base = (base);		\
36	uint32_t __rem;				\
37	__rem = ((uint64_t)(n)) % __base;	\
38	(n) = ((uint64_t)(n)) / __base;		\
39	__rem;					\
40})
41
42static inline uint64_t
43div_u64_rem(uint64_t dividend, uint32_t divisor, uint32_t *remainder)
44{
45	*remainder = dividend % divisor;
46	return (dividend / divisor);
47}
48
49static inline uint64_t
50div_u64(uint64_t dividend, uint32_t divisor)
51{
52	return (dividend / divisor);
53}
54
55#endif					/* _LINUX_MATH64_H */
56