Release 4.14 lib/reciprocal_div.c

// SPDX-License-Identifier: GPL-2.0
#include <linux/kernel.h>
#include <asm/div64.h>
#include <linux/reciprocal_div.h>
#include <linux/export.h>

/*
 * For a description of the algorithm please have a look at
 * include/linux/reciprocal_div.h
 */



struct reciprocal_value reciprocal_value(u32 d)
{
	struct reciprocal_value R;
	u64 m;
	int l;

	l = fls(d - 1);
	m = ((1ULL << 32) * ((1ULL << l) - d));
	do_div(m, d);
	++m;
	R.m = (u32)m;
	R.sh1 = min(l, 1);
	R.sh2 = max(l - 1, 0);

	return R;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Hannes Frederic Sowa
71
75.53%
1
50.00%
Eric Dumazet
23
24.47%
1
50.00%
Total
94
100.00%
2
100.00%


EXPORT_SYMBOL(reciprocal_value);
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Hannes Frederic Sowa
75
66.37%
1
25.00%
Eric Dumazet
37
32.74%
2
50.00%
Greg Kroah-Hartman
1
0.88%
1
25.00%
Total
113
100.00%
4
100.00%
Directory: lib

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.