[people/ms/u-boot.git] / arch / arm / include / asm / utils.h

/*
 * (C) Copyright 2010
 * Texas Instruments, <www.ti.com>
 * Aneesh V <aneesh@ti.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */
#ifndef _UTILS_H_
#define _UTILS_H_

static inline s32 log_2_n_round_up(u32 n)
{
	s32 log2n = -1;
	u32 temp = n;

	while (temp) {
		log2n++;
		temp >>= 1;
	}

	if (n & (n - 1))
		return log2n + 1; /* not power of 2 - round up */
	else
		return log2n; /* power of 2 */
}

static inline s32 log_2_n_round_down(u32 n)
{
	s32 log2n = -1;
	u32 temp = n;

	while (temp) {
		log2n++;
		temp >>= 1;
	}

	return log2n;
}

#endif
Commit	Line	Data
2c451f78 A	1	/*
	2	* (C) Copyright 2010
	3	* Texas Instruments, <www.ti.com>
	4	* Aneesh V <aneesh@ti.com>
	5	*
1a459660	6	* SPDX-License-Identifier: GPL-2.0+
2c451f78 A	7	*/
	8	#ifndef _UTILS_H_
	9	#define _UTILS_H_
	10
	11	static inline s32 log_2_n_round_up(u32 n)
	12	{
	13	s32 log2n = -1;
	14	u32 temp = n;
	15
	16	while (temp) {
	17	log2n++;
	18	temp >>= 1;
	19	}
	20
	21	if (n & (n - 1))
	22	return log2n + 1; /* not power of 2 - round up */
	23	else
	24	return log2n; /* power of 2 */
	25	}
	26
	27	static inline s32 log_2_n_round_down(u32 n)
	28	{
	29	s32 log2n = -1;
	30	u32 temp = n;
	31
	32	while (temp) {
	33	log2n++;
	34	temp >>= 1;
	35	}
	36
	37	return log2n;
	38	}
	39
	40	#endif