[thirdparty/linux.git] / lib / math / lcm.c

// SPDX-License-Identifier: GPL-2.0-only
#include <linux/compiler.h>
#include <linux/gcd.h>
#include <linux/export.h>
#include <linux/lcm.h>

/* Lowest common multiple */
unsigned long lcm(unsigned long a, unsigned long b)
{
	if (a && b)
		return (a / gcd(a, b)) * b;
	else
		return 0;
}
EXPORT_SYMBOL_GPL(lcm);

unsigned long lcm_not_zero(unsigned long a, unsigned long b)
{
	unsigned long l = lcm(a, b);

	if (l)
		return l;

	return (b ? : a);
}
EXPORT_SYMBOL_GPL(lcm_not_zero);
Commit	Line	Data
457c8996	1	// SPDX-License-Identifier: GPL-2.0-only
6016daed	2	#include <linux/compiler.h>
2cda2728	3	#include <linux/gcd.h>
8bc3bcc9	4	#include <linux/export.h>
72d39508	5	#include <linux/lcm.h>
2cda2728 MP	6
	7	/* Lowest common multiple */
	8	unsigned long lcm(unsigned long a, unsigned long b)
	9	{
	10	if (a && b)
74a5fef7	11	return (a / gcd(a, b)) * b;
69c953c8 RV	12	else
69c953c8 RV	13	return 0;
2cda2728 MP	14	}
2cda2728 MP	15	EXPORT_SYMBOL_GPL(lcm);
e9637415 MS	16
	17	unsigned long lcm_not_zero(unsigned long a, unsigned long b)
	18	{
	19	unsigned long l = lcm(a, b);
	20
	21	if (l)
	22	return l;
	23
	24	return (b ? : a);
	25	}
	26	EXPORT_SYMBOL_GPL(lcm_not_zero);