math64.h revision 289624 
1/* $FreeBSD: head/sys/ofed/include/linux/math64.h 289624 2015-10-20 11:40:04Z hselasky $ */
2/*-
3 * Copyright (c) 2007 Cisco Systems, Inc.  All rights reserved.
4 * Copyright (c) 2014-2015 Mellanox Technologies, Ltd. All rights reserved.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice unmodified, this list of conditions, and the following
12 *    disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
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