| Haavard Skinnemoen | d68041c | 2006-10-24 10:12:44 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2004-2006 Atmel Corporation |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 as |
| 6 | * published by the Free Software Foundation. |
| 7 | */ |
| 8 | |
| 9 | .text |
| 10 | .Lnot_word_aligned: |
| 11 | 1: ld.ub r8, r12[0] |
| 12 | sub r10, 1 |
| 13 | st.b r11++, r8 |
| 14 | reteq r12 |
| 15 | tst r11, r9 |
| 16 | brne 1b |
| 17 | |
| 18 | /* fall through */ |
| 19 | |
| 20 | .global __raw_readsb |
| 21 | .type __raw_readsb,@function |
| 22 | __raw_readsb: |
| 23 | cp.w r10, 0 |
| 24 | mov r9, 3 |
| 25 | reteq r12 |
| 26 | |
| 27 | tst r11, r9 |
| 28 | brne .Lnot_word_aligned |
| 29 | |
| 30 | sub r10, 4 |
| 31 | brlt 2f |
| 32 | |
| 33 | 1: ldins.b r8:t, r12[0] |
| 34 | ldins.b r8:u, r12[0] |
| 35 | ldins.b r8:l, r12[0] |
| 36 | ldins.b r8:b, r12[0] |
| 37 | st.w r11++, r8 |
| 38 | sub r10, 4 |
| 39 | brge 1b |
| 40 | |
| 41 | 2: sub r10, -4 |
| 42 | reteq r12 |
| 43 | |
| Haavard Skinnemoen | c1f24ac | 2008-06-09 14:16:06 +0200 | [diff] [blame] | 44 | 3: ld.ub r8, r12[0] |
| Haavard Skinnemoen | d68041c | 2006-10-24 10:12:44 +0200 | [diff] [blame] | 45 | sub r10, 1 |
| 46 | st.b r11++, r8 |
| 47 | brne 3b |
| Haavard Skinnemoen | 6af0f5f | 2006-11-06 14:06:45 +0100 | [diff] [blame] | 48 | |
| 49 | retal r12 |