1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * An integer based power function
4 *
5 * Derived from drivers/video/backlight/pwm_bl.c
6 */
7
8 #include <linux/export.h>
9 #include <linux/math.h>
10 #include <linux/types.h>
11
12 /**
13 * int_pow - computes the exponentiation of the given base and exponent
14 * @base: base which will be raised to the given power
15 * @exp: power to be raised to
16 *
17 * Computes: pow(base, exp), i.e. @base raised to the @exp power
18 */
19 u64 int_pow(u64 base, unsigned int exp)
20 {
21 u64 result = 1;
22
23 while (exp) {
24 if (exp & 1)
25 result *= base;
26 exp >>= 1;
27 base *= base;
28 }
29
30 return result;
31 }
32 EXPORT_SYMBOL_GPL(int_pow);
33
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