| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Copyright (C) 1999-2016 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | Contributed by Kazumoto Kojima <kkojima@rr.iij4u.or.jp> |
| 4 | Optimized by Toshiyasu Morita <toshiyasu.morita@hsa.hitachi.com> |
| 5 | |
| 6 | The GNU C Library is free software; you can redistribute it and/or |
| 7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either |
| 9 | version 2.1 of the License, or (at your option) any later version. |
| 10 | |
| 11 | The GNU C Library is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | Lesser General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU Lesser General Public |
| 17 | License along with the GNU C Library; if not, see |
| 18 | <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include <sysdep.h> |
| 21 | |
| 22 | /* void *memset (t, c, len); */ |
| 23 | |
| 24 | ENTRY(memset) |
| 25 | mov #12,r0 |
| 26 | cmp/gt r6,r0 |
| 27 | bt.s L_byte_loop_init |
| 28 | mov r4,r7 |
| 29 | |
| 30 | extu.b r5,r5 |
| 31 | swap.b r5,r1 |
| 32 | or r1,r5 |
| 33 | swap.w r5,r1 |
| 34 | or r1,r5 |
| 35 | |
| 36 | mov r4,r0 |
| 37 | tst #1,r0 |
| 38 | bt L_wordalign |
| 39 | |
| 40 | mov.b r5,@r4 |
| 41 | add #-1,r6 |
| 42 | add #1,r4 |
| 43 | mov r4,r0 |
| 44 | |
| 45 | .balignw 4,0x0009 |
| 46 | L_wordalign: |
| 47 | tst #2,r0 |
| 48 | bt L_word_loop_init |
| 49 | |
| 50 | mov.w r5,@r4 |
| 51 | add #-2,r6 |
| 52 | add #2,r4 |
| 53 | mov r4,r0 |
| 54 | |
| 55 | .balignw 4,0x0009 |
| 56 | L_word_loop_init: |
| 57 | mov r6,r3 |
| 58 | shlr2 r3 |
| 59 | mov #7,r0 |
| 60 | shlr r3 |
| 61 | and r0,r6 |
| 62 | |
| 63 | .balignw 4,0x0009 |
| 64 | L_2word_loop: |
| 65 | mov.l r5,@r4 |
| 66 | dt r3 |
| 67 | mov.l r5,@(4,r4) |
| 68 | bf.s L_2word_loop |
| 69 | add #8,r4 |
| 70 | |
| 71 | .balignw 4,0x0009 |
| 72 | L_byte_loop_init: |
| 73 | tst r6,r6 |
| 74 | bt L_byte_exit |
| 75 | |
| 76 | .balignw 4,0x0009 |
| 77 | L_byte_loop: |
| 78 | mov.b r5,@r4 |
| 79 | dt r6 |
| 80 | bf.s L_byte_loop |
| 81 | add #1,r4 |
| 82 | |
| 83 | .balignw 4,0x0009 |
| 84 | L_byte_exit: |
| 85 | rts |
| 86 | mov r7,r0 |
| 87 | END(memset) |
| 88 | libc_hidden_builtin_def (memset) |