1 /*-
2 * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2014-2015 Mellanox Technologies, Ltd. All rights reserved.
4 * Copyright (c) 2016-2020 François Tigeot <ftigeot@wolfpond.org>
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 * $FreeBSD: head/sys/compat/linuxkpi/common/include/linux/math64.h 290135 2015-10-29 08:28:39Z hselasky $
29 */
30
31 #ifndef _LINUX_MATH64_H
32 #define _LINUX_MATH64_H
33
34 #include <linux/types.h>
35
36 #define do_div(n, base) ({ \
37 uint32_t __base = (base); \
38 uint32_t __rem; \
39 __rem = ((uint64_t)(n)) % __base; \
40 (n) = ((uint64_t)(n)) / __base; \
41 __rem; \
42 })
43
44 static inline uint64_t
div_u64_rem(uint64_t dividend,uint32_t divisor,uint32_t * remainder)45 div_u64_rem(uint64_t dividend, uint32_t divisor, uint32_t *remainder)
46 {
47 *remainder = dividend % divisor;
48 return (dividend / divisor);
49 }
50
51 static inline uint64_t
div64_u64(uint64_t dividend,uint64_t divisor)52 div64_u64(uint64_t dividend, uint64_t divisor)
53 {
54 return (dividend / divisor);
55 }
56
57 static inline int64_t
div64_s64(int64_t dividend,int64_t divisor)58 div64_s64(int64_t dividend, int64_t divisor)
59 {
60 return (dividend / divisor);
61 }
62
63 static inline uint64_t
div_u64(uint64_t dividend,uint32_t divisor)64 div_u64(uint64_t dividend, uint32_t divisor)
65 {
66 return (dividend / divisor);
67 }
68
69 static inline int64_t
div_s64(int64_t dividend,int32_t divisor)70 div_s64(int64_t dividend, int32_t divisor)
71 {
72 return (dividend / divisor);
73 }
74
75 static inline u64
div64_u64_rem(u64 dividend,u64 divisor,u64 * remainder)76 div64_u64_rem(u64 dividend, u64 divisor, u64 *remainder)
77 {
78 *remainder = dividend % divisor;
79 return (dividend / divisor);
80 }
81
82 static inline u64
mul_u32_u32(u32 a,u32 b)83 mul_u32_u32(u32 a, u32 b)
84 {
85 return (uint64_t)a * b;
86 }
87
88 #endif /* _LINUX_MATH64_H */
89