[linux-block.git] / include / vdso / math64.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __VDSO_MATH64_H
#define __VDSO_MATH64_H

static __always_inline u32
__iter_div_u64_rem(u64 dividend, u32 divisor, u64 *remainder)
{
	u32 ret = 0;

	while (dividend >= divisor) {
		/* The following asm() prevents the compiler from
		   optimising this loop into a modulo operation.  */
		asm("" : "+rm"(dividend));

		dividend -= divisor;
		ret++;
	}

	*remainder = dividend;

	return ret;
}

#endif /* __VDSO_MATH64_H */
Commit	Line	Data
b874b835 VF	1	/* SPDX-License-Identifier: GPL-2.0 */
	2	#ifndef __VDSO_MATH64_H
	3	#define __VDSO_MATH64_H
	4
	5	static __always_inline u32
	6	__iter_div_u64_rem(u64 dividend, u32 divisor, u64 *remainder)
	7	{
	8	u32 ret = 0;
	9
	10	while (dividend >= divisor) {
	11	/* The following asm() prevents the compiler from
	12	optimising this loop into a modulo operation. */
	13	asm("" : "+rm"(dividend));
	14
	15	dividend -= divisor;
	16	ret++;
	17	}
	18
	19	*remainder = dividend;
	20
	21	return ret;
	22	}
	23
	24	#endif /* __VDSO_MATH64_H */