Release 4.7 lib/int_sqrt.c
/*
* Copyright (C) 2013 Davidlohr Bueso <davidlohr.bueso@hp.com>
*
* Based on the shift-and-subtract algorithm for computing integer
* square root from Guy L. Steele.
*/
#include <linux/kernel.h>
#include <linux/export.h>
/**
* int_sqrt - rough approximation to sqrt
* @x: integer of which to calculate the sqrt
*
* A very rough approximation to the sqrt() function.
*/
unsigned long int_sqrt(unsigned long x)
{
unsigned long b, m, y = 0;
if (x <= 1)
return x;
m = 1UL << (BITS_PER_LONG - 2);
while (m != 0) {
b = y + m;
y >>= 1;
if (x >= b) {
x -= b;
y += m;
}
m >>= 2;
}
return y;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
andrew morton | andrew morton | 38 | 47.50% | 1 | 33.33% |
davidlohr bueso | davidlohr bueso | 36 | 45.00% | 1 | 33.33% |
peter williams | peter williams | 6 | 7.50% | 1 | 33.33% |
| Total | 80 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL(int_sqrt);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
andrew morton | andrew morton | 49 | 52.69% | 1 | 25.00% |
davidlohr bueso | davidlohr bueso | 37 | 39.78% | 1 | 25.00% |
peter williams | peter williams | 6 | 6.45% | 1 | 25.00% |
paul gortmaker | paul gortmaker | 1 | 1.08% | 1 | 25.00% |
| Total | 93 | 100.00% | 4 | 100.00% |
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