| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2004-2007 Atmel Corporation |
| 3 | * |
| 4 | * This file is subject to the terms and conditions of the GNU Lesser General |
| 5 | * Public License. See the file "COPYING.LIB" in the main directory of this |
| 6 | * archive for more details. |
| 7 | */ |
| 8 | |
| 9 | #include <features.h> |
| 10 | |
| 11 | #define s1 r12 |
| 12 | #define s2 r11 |
| 13 | #define len r10 |
| 14 | |
| 15 | .text |
| 16 | .global memcmp |
| 17 | .type memcmp, @function |
| 18 | .align 1 |
| 19 | memcmp: |
| 20 | sub len, 4 |
| 21 | brlt .Lless_than_4 |
| 22 | |
| 23 | 1: ld.w r8, s1++ |
| 24 | ld.w r9, s2++ |
| 25 | cp.w r8, r9 |
| 26 | brne .Lfound_word |
| 27 | sub len, 4 |
| 28 | brge 1b |
| 29 | |
| 30 | .Lless_than_4: |
| 31 | sub len, -4 |
| 32 | reteq 0 |
| 33 | |
| 34 | 1: ld.ub r8, s1++ |
| 35 | ld.ub r9, s2++ |
| 36 | sub r8, r9 |
| 37 | retne r8 |
| 38 | sub len, 1 |
| 39 | brgt 1b |
| 40 | |
| 41 | retal 0 |
| 42 | |
| 43 | .Lfound_word: |
| 44 | mov len, 4 |
| 45 | |
| 46 | 2: bfextu r11, r9, 24, 8 |
| 47 | bfextu r12, r8, 24, 8 |
| 48 | sub r12, r11 |
| 49 | retne r12 |
| 50 | lsl r8, 8 |
| 51 | lsl r9, 8 |
| 52 | sub len, 1 |
| 53 | brne 2b |
| 54 | retal r12 |
| 55 | |
| 56 | .size memcmp, . - memcmp |
| 57 | |
| 58 | libc_hidden_def(memcmp) |
| 59 | #ifdef __UCLIBC_SUSV3_LEGACY__ |
| 60 | strong_alias(memcmp,bcmp) |
| 61 | #endif |