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 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 52 div64_u64(uint64_t dividend, uint64_t divisor) 53 { 54 return (dividend / divisor); 55 } 56 57 static inline int64_t 58 div64_s64(int64_t dividend, int64_t divisor) 59 { 60 return (dividend / divisor); 61 } 62 63 static inline uint64_t 64 div_u64(uint64_t dividend, uint32_t divisor) 65 { 66 return (dividend / divisor); 67 } 68 69 static inline int64_t 70 div_s64(int64_t dividend, int32_t divisor) 71 { 72 return (dividend / divisor); 73 } 74 75 static inline u64 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 83 mul_u32_u32(u32 a, u32 b) 84 { 85 return (uint64_t)a * b; 86 } 87 88 #endif /* _LINUX_MATH64_H */ 89