| Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
| 3 | * Generic __div64_32 wrapper for __xdiv64_32. |
| 4 | */ |
| 5 | |
| 6 | #include <linux/types.h> |
| Paul Mundt | fa43972 | 2008-09-04 18:53:58 +0900 | [diff] [blame] | 7 | #include <asm/div64.h> |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | |
| Paul Mundt | 075fc19 | 2007-07-13 12:27:13 +0900 | [diff] [blame] | 9 | extern uint64_t __xdiv64_32(u64 n, u32 d); |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | |
| Paul Mundt | 04c7d95 | 2007-07-06 10:58:04 +0900 | [diff] [blame] | 11 | uint32_t __div64_32(u64 *xp, u32 y) |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | { |
| Paul Mundt | 04c7d95 | 2007-07-06 10:58:04 +0900 | [diff] [blame] | 13 | uint32_t rem; |
| Paul Mundt | 075fc19 | 2007-07-13 12:27:13 +0900 | [diff] [blame] | 14 | uint64_t q = __xdiv64_32(*xp, y); |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | |
| 16 | rem = *xp - q * y; |
| 17 | *xp = q; |
| 18 | |
| 19 | return rem; |
| 20 | } |
