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 François Tigeot 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 #ifndef _LINUX_MATH64_H 31 #define _LINUX_MATH64_H 32 33 #include <linux/types.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 43 static inline uint64_t 44 div_u64_rem(uint64_t dividend, uint32_t divisor, uint32_t *remainder) 45 { 46 *remainder = dividend % divisor; 47 return (dividend / divisor); 48 } 49 50 static inline uint64_t 51 div64_u64(uint64_t dividend, uint64_t divisor) 52 { 53 return (dividend / divisor); 54 } 55 56 static inline int64_t 57 div64_s64(int64_t dividend, int64_t divisor) 58 { 59 return (dividend / divisor); 60 } 61 62 static inline uint64_t 63 div_u64(uint64_t dividend, uint32_t divisor) 64 { 65 return (dividend / divisor); 66 } 67 68 static inline int64_t 69 div_s64(int64_t dividend, int32_t divisor) 70 { 71 return (dividend / divisor); 72 } 73 74 75 #endif /* _LINUX_MATH64_H */ 76