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div64.h revision 1.1.6.2 
      1  1.1.6.2  martin /*	$NetBSD: div64.h,v 1.1.6.2 2020/04/08 14:08:21 martin Exp $	*/
      2  1.1.6.2  martin 
      3  1.1.6.2  martin /*-
      4  1.1.6.2  martin  * Copyright (c) 2014 The NetBSD Foundation, Inc.
      5  1.1.6.2  martin  * All rights reserved.
      6  1.1.6.2  martin  *
      7  1.1.6.2  martin  * This code is derived from software contributed to The NetBSD Foundation
      8  1.1.6.2  martin  * by Taylor R. Campbell.
      9  1.1.6.2  martin  *
     10  1.1.6.2  martin  * Redistribution and use in source and binary forms, with or without
     11  1.1.6.2  martin  * modification, are permitted provided that the following conditions
     12  1.1.6.2  martin  * are met:
     13  1.1.6.2  martin  * 1. Redistributions of source code must retain the above copyright
     14  1.1.6.2  martin  *    notice, this list of conditions and the following disclaimer.
     15  1.1.6.2  martin  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.1.6.2  martin  *    notice, this list of conditions and the following disclaimer in the
     17  1.1.6.2  martin  *    documentation and/or other materials provided with the distribution.
     18  1.1.6.2  martin  *
     19  1.1.6.2  martin  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  1.1.6.2  martin  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  1.1.6.2  martin  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  1.1.6.2  martin  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  1.1.6.2  martin  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  1.1.6.2  martin  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  1.1.6.2  martin  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  1.1.6.2  martin  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  1.1.6.2  martin  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  1.1.6.2  martin  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  1.1.6.2  martin  * POSSIBILITY OF SUCH DAMAGE.
     30  1.1.6.2  martin  */
     31  1.1.6.2  martin 
     32  1.1.6.2  martin #ifndef _ASM_DIV64_H_
     33  1.1.6.2  martin #define _ASM_DIV64_H_
     34  1.1.6.2  martin 
     35  1.1.6.2  martin #include <sys/types.h>
     36  1.1.6.2  martin 
     37  1.1.6.2  martin #define	do_div(n_q, d)	_do_div(&(n_q), (d))
     38  1.1.6.2  martin 
     39  1.1.6.2  martin static inline uint32_t
     40  1.1.6.2  martin _do_div(uint64_t *n_q, uint32_t d)
     41  1.1.6.2  martin {
     42  1.1.6.2  martin 	const uint32_t r = *n_q % d;
     43  1.1.6.2  martin 	const uint32_t q = *n_q / d;
     44  1.1.6.2  martin 
     45  1.1.6.2  martin 	*n_q = q;
     46  1.1.6.2  martin 	return r;
     47  1.1.6.2  martin }
     48  1.1.6.2  martin 
     49  1.1.6.2  martin #endif  /* _ASM_DIV64_H_ */
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