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885ab0dba2
Needed by drm-kmod. Reviewed by: hselasky Obtained from: OpenBSD Sponsored by: Beckhoff Automation GmbH & Co. KG Differential Revision: https://reviews.freebsd.org/D35937
122 lines
3.1 KiB
C
122 lines
3.1 KiB
C
/*-
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* Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2014-2015 Mellanox Technologies, Ltd. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _LINUXKPI_LINUX_MATH64_H
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#define _LINUXKPI_LINUX_MATH64_H
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#include <sys/stdint.h>
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#define do_div(n, base) ({ \
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uint32_t __base = (base); \
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uint32_t __rem; \
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__rem = ((uint64_t)(n)) % __base; \
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(n) = ((uint64_t)(n)) / __base; \
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__rem; \
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})
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static inline uint64_t
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div64_u64_rem(uint64_t dividend, uint64_t divisor, uint64_t *remainder)
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{
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*remainder = dividend % divisor;
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return (dividend / divisor);
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}
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static inline int64_t
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div64_s64(int64_t dividend, int64_t divisor)
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{
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return (dividend / divisor);
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}
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static inline uint64_t
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div64_u64(uint64_t dividend, uint64_t divisor)
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{
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return (dividend / divisor);
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}
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static inline uint64_t
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div_u64_rem(uint64_t dividend, uint32_t divisor, uint32_t *remainder)
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{
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*remainder = dividend % divisor;
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return (dividend / divisor);
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}
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static inline int64_t
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div_s64(int64_t dividend, int32_t divisor)
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{
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return (dividend / divisor);
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}
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static inline uint64_t
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div_u64(uint64_t dividend, uint32_t divisor)
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{
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return (dividend / divisor);
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}
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static inline uint64_t
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mul_u32_u32(uint32_t a, uint32_t b)
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{
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return ((uint64_t)a * b);
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}
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static inline uint64_t
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div64_u64_round_up(uint64_t dividend, uint64_t divisor)
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{
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return ((dividend + divisor - 1) / divisor);
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}
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#define DIV64_U64_ROUND_UP(...) \
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div64_u64_round_up(__VA_ARGS__)
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static inline uint64_t
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mul_u64_u32_div(uint64_t x, uint32_t y, uint32_t div)
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{
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const uint64_t rem = x % div;
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return ((x / div) * y + (rem * y) / div);
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}
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static inline uint64_t
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mul_u64_u32_shr(uint64_t x, uint32_t y, unsigned int shift)
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{
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uint32_t hi, lo;
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hi = x >> 32;
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lo = x & 0xffffffff;
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return (mul_u32_u32(lo, y) >> shift) +
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(mul_u32_u32(hi, y) << (32 - shift));
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}
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#endif /* _LINUXKPI_LINUX_MATH64_H */
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