math64.h revision 289569
1270710Shselasky/*- 2270710Shselasky * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved. 3289569Shselasky * Copyright (c) 2014-2015 Mellanox Technologies, Ltd. All rights reserved. 4270710Shselasky * All rights reserved. 5270710Shselasky * 6270710Shselasky * Redistribution and use in source and binary forms, with or without 7270710Shselasky * modification, are permitted provided that the following conditions 8270710Shselasky * are met: 9270710Shselasky * 1. Redistributions of source code must retain the above copyright 10270710Shselasky * notice unmodified, this list of conditions, and the following 11270710Shselasky * disclaimer. 12270710Shselasky * 2. Redistributions in binary form must reproduce the above copyright 13270710Shselasky * notice, this list of conditions and the following disclaimer in the 14270710Shselasky * documentation and/or other materials provided with the distribution. 15270710Shselasky * 16270710Shselasky * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17270710Shselasky * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18270710Shselasky * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19270710Shselasky * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20270710Shselasky * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21270710Shselasky * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22270710Shselasky * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23270710Shselasky * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24270710Shselasky * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25270710Shselasky * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26270710Shselasky */ 27270710Shselasky 28270710Shselasky#ifndef _LINUX_MATH64_H 29289569Shselasky#define _LINUX_MATH64_H 30270710Shselasky 31289569Shselasky#include <sys/stdint.h> 32270710Shselasky 33289569Shselasky#define do_div(n, base) ({ \ 34289569Shselasky uint32_t __base = (base); \ 35289569Shselasky uint32_t __rem; \ 36289569Shselasky __rem = ((uint64_t)(n)) % __base; \ 37289569Shselasky (n) = ((uint64_t)(n)) / __base; \ 38289569Shselasky __rem; \ 39270710Shselasky}) 40270710Shselasky 41289569Shselaskystatic inline uint64_t 42289569Shselaskydiv_u64_rem(uint64_t dividend, uint32_t divisor, uint32_t *remainder) 43270710Shselasky{ 44289569Shselasky *remainder = dividend % divisor; 45289569Shselasky return (dividend / divisor); 46270710Shselasky} 47270710Shselasky 48289569Shselaskystatic inline uint64_t 49289569Shselaskydiv_u64(uint64_t dividend, uint32_t divisor) 50270710Shselasky{ 51289569Shselasky return (dividend / divisor); 52270710Shselasky} 53270710Shselasky 54289569Shselasky#endif /* _LINUX_MATH64_H */ 55