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 */
19u64 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}
32EXPORT_SYMBOL_GPL(int_pow);