| Vincenzo Frascino | b874b83 | 2020-03-20 14:53:34 +0000 | [diff] [blame] | 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 */ |