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32 lines
629 B
32 lines
629 B
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* An integer based power function |
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* |
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* Derived from drivers/video/backlight/pwm_bl.c |
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*/ |
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#include <linux/export.h> |
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#include <linux/math.h> |
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#include <linux/types.h> |
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/** |
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* int_pow - computes the exponentiation of the given base and exponent |
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* @base: base which will be raised to the given power |
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* @exp: power to be raised to |
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* |
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* Computes: pow(base, exp), i.e. @base raised to the @exp power |
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*/ |
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u64 int_pow(u64 base, unsigned int exp) |
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{ |
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u64 result = 1; |
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while (exp) { |
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if (exp & 1) |
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result *= base; |
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exp >>= 1; |
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base *= base; |
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} |
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return result; |
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} |
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EXPORT_SYMBOL_GPL(int_pow);
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