| Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [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 | .Lnot_word_aligned: |
| 10 | /* |
| 11 | * Bad alignment will cause a hardware exception, which is as |
| 12 | * good as anything. No need for us to check for proper alignment. |
| 13 | */ |
| 14 | ld.uh r8, r12[0] |
| 15 | sub r10, 1 |
| 16 | st.h r11++, r8 |
| 17 | |
| 18 | /* fall through */ |
| 19 | |
| 20 | .global __raw_readsw |
| 21 | .type __raw_readsw,@function |
| 22 | __raw_readsw: |
| 23 | cp.w r10, 0 |
| 24 | reteq r12 |
| 25 | mov r9, 3 |
| 26 | tst r11, r9 |
| 27 | brne .Lnot_word_aligned |
| 28 | |
| 29 | sub r10, 2 |
| 30 | brlt 2f |
| 31 | |
| 32 | 1: ldins.h r8:t, r12[0] |
| 33 | ldins.h r8:b, r12[0] |
| 34 | st.w r11++, r8 |
| 35 | sub r10, 2 |
| 36 | brge 1b |
| 37 | |
| 38 | 2: sub r10, -2 |
| 39 | reteq r12 |
| 40 | |
| 41 | ld.uh r8, r12[0] |
| 42 | st.h r11++, r8 |
| 43 | retal r12 |