| 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 | /* |
| Paul Mundt | 04c7d95 | 2007-07-06 10:58:04 +0900 | [diff] [blame] | 3 | * unsigned long __xdiv64_32(unsigned long long n, unsigned long d); |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | */ |
| 5 | |
| 6 | #include <linux/linkage.h> |
| 7 | |
| 8 | .text |
| 9 | ENTRY(__xdiv64_32) |
| Paul Mundt | 04c7d95 | 2007-07-06 10:58:04 +0900 | [diff] [blame] | 10 | #ifdef CONFIG_CPU_LITTLE_ENDIAN |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | mov r4, r0 |
| 12 | mov r5, r1 |
| 13 | #else |
| 14 | mov r4, r1 |
| 15 | mov r5, r0 |
| 16 | #endif |
| 17 | cmp/hs r6, r1 |
| 18 | bf.s 1f |
| 19 | mov #0, r2 |
| 20 | |
| 21 | mov r1, r2 |
| 22 | mov #0, r3 |
| 23 | div0u |
| 24 | .rept 32 |
| 25 | rotcl r2 |
| 26 | div1 r6, r3 |
| 27 | .endr |
| 28 | rotcl r2 |
| 29 | mul.l r6, r2 |
| 30 | sts macl, r3 |
| 31 | sub r3, r1 |
| 32 | 1: |
| 33 | div0u |
| 34 | .rept 32 |
| 35 | rotcl r0 |
| 36 | div1 r6, r1 |
| 37 | .endr |
| Paul Mundt | 04c7d95 | 2007-07-06 10:58:04 +0900 | [diff] [blame] | 38 | #ifdef CONFIG_CPU_LITTLE_ENDIAN |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | mov r2, r1 |
| 40 | rts |
| 41 | rotcl r0 |
| 42 | #else |
| 43 | rotcl r0 |
| 44 | mov r0, r1 |
| 45 | rts |
| 46 | mov r2, r0 |
| 47 | #endif |