| 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 s r12 |
| 12 | #define c r11 |
| 13 | #define n r10 |
| 14 | |
| 15 | .text |
| 16 | .global memset |
| 17 | .type memset, @function |
| 18 | |
| 19 | .align 1 |
| 20 | memset: |
| 21 | cp.w n, 32 |
| 22 | mov r9, s |
| 23 | brge .Llarge_memset |
| 24 | |
| 25 | sub n, 1 |
| 26 | retlt s |
| 27 | 1: st.b s++, c |
| 28 | sub n, 1 |
| 29 | brge 1b |
| 30 | |
| 31 | retal r9 |
| 32 | |
| 33 | .Llarge_memset: |
| 34 | mov r8, r11 |
| 35 | mov r11, 3 |
| 36 | bfins r8, r8, 8, 8 |
| 37 | bfins r8, r8, 16, 16 |
| 38 | tst s, r11 |
| 39 | breq 2f |
| 40 | |
| 41 | 1: st.b s++, r8 |
| 42 | sub n, 1 |
| 43 | tst s, r11 |
| 44 | brne 1b |
| 45 | |
| 46 | 2: mov r11, r9 |
| 47 | mov r9, r8 |
| 48 | sub n, 8 |
| 49 | |
| 50 | 3: st.d s++, r8 |
| 51 | sub n, 8 |
| 52 | brge 3b |
| 53 | |
| 54 | /* If we are done, n == -8 and we'll skip all st.b insns below */ |
| 55 | neg n |
| 56 | lsl n, 1 |
| 57 | add pc, n |
| 58 | .rept 7 |
| 59 | st.b s++, r8 |
| 60 | .endr |
| 61 | retal r11 |
| 62 | |
| 63 | .size memset, . - memset |
| 64 | |
| 65 | libc_hidden_def(memset) |