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 361195 2020-05-18 09:24:36Z hselasky $
28 */
29
30#ifndef _LINUX_MATH64_H
31#define	_LINUX_MATH64_H
32
33#include <sys/stdint.h>
34
35#define	do_div(n, base) ({			\
36	uint32_t __base = (base);		\
37	uint32_t __rem;				\
38	__rem = ((uint64_t)(n)) % __base;	\
39	(n) = ((uint64_t)(n)) / __base;		\
40	__rem;					\
41})
42
43static inline uint64_t
44div64_u64_rem(uint64_t dividend, uint64_t divisor, uint64_t *remainder)
45{
46
47	*remainder = dividend % divisor;
48	return (dividend / divisor);
49}
50
51static inline int64_t
52div64_s64(int64_t dividend, int64_t divisor)
53{
54
55	return (dividend / divisor);
56}
57
58static inline uint64_t
59div64_u64(uint64_t dividend, uint64_t divisor)
60{
61
62	return (dividend / divisor);
63}
64
65static inline uint64_t
66div_u64_rem(uint64_t dividend, uint32_t divisor, uint32_t *remainder)
67{
68
69	*remainder = dividend % divisor;
70	return (dividend / divisor);
71}
72
73static inline int64_t
74div_s64(int64_t dividend, int32_t divisor)
75{
76
77	return (dividend / divisor);
78}
79
80static inline uint64_t
81div_u64(uint64_t dividend, uint32_t divisor)
82{
83
84	return (dividend / divisor);
85}
86
87static inline uint64_t
88mul_u32_u32(uint32_t a, uint32_t b)
89{
90
91	return ((uint64_t)a * b);
92}
93
94static inline uint64_t
95div64_u64_round_up(uint64_t dividend, uint64_t divisor)
96{
97	return ((dividend + divisor - 1) / divisor);
98}
99
100#define	DIV64_U64_ROUND_UP(...) \
101	div64_u64_round_up(__VA_ARGS__)
102
103#endif /* _LINUX_MATH64_H */
104