projects / thirdparty / glibc.git / blame
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| 3846ef75 UD |
1 | /* Copyright (C) 1999, 2000 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 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
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9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 41bdb6e2 | 13 | Lesser General Public License for more details. |
| 3846ef75 | 14 | |
| 41bdb6e2 AJ |
15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, write to the Free | |
| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
| 18 | 02111-1307 USA. */ | |
| 3846ef75 UD |
19 | |
| 20 | #include <sysdep.h> | |
| 21 | ||
| 22 | /* void *memset (t, c, len) */ | |
| 23 | ||
| 24 | ENTRY(memset) | |
| 25 | tst r6, r6 | |
| 26 | bt/s end | |
| 27 | mov r4, r3 | |
| 28 | mov #3, r0 | |
| 29 | cmp/hs r6, r0 | |
| 30 | bt/s 2f | |
| 31 | and r4, r0 | |
| 32 | tst r0, r0 | |
| 33 | bt/s 1f | |
| 34 | add r0, r6 | |
| 35 | add #-1, r0 | |
| 36 | shll2 r0 | |
| 37 | braf r0 | |
| 38 | add #-4, r6 | |
| 39 | ||
| 40 | mov.b r5, @r4 | |
| 41 | add #1, r4 | |
| 42 | mov.b r5, @r4 | |
| 43 | add #1, r4 | |
| 44 | mov.b r5, @r4 | |
| 45 | add #1, r4 | |
| 46 | 1: | |
| 47 | extu.b r5, r0 | |
| 48 | shll8 r5 | |
| 49 | or r5, r0 | |
| 50 | extu.w r0, r0 | |
| 51 | mov r0, r5 | |
| 52 | swap.w r5, r5 | |
| 53 | or r0, r5 | |
| 54 | ||
| 55 | 2: | |
| 56 | add #-4, r6 | |
| 57 | cmp/pz r6 | |
| 58 | bf afew | |
| 59 | mov.l r5, @r4 | |
| 60 | bra 2b | |
| 61 | add #4, r4 | |
| 62 | ||
| 63 | afew: | |
| 64 | mov #-1, r0 | |
| 65 | sub r6, r0 | |
| 66 | shll2 r0 | |
| 67 | braf r0 | |
| 68 | nop | |
| 69 | ||
| 70 | mov.b r5, @r4 | |
| 71 | add #1, r4 | |
| 72 | mov.b r5, @r4 | |
| 73 | add #1, r4 | |
| 74 | mov.b r5, @r4 | |
| 75 | add #1, r4 | |
| 76 | end: | |
| 77 | rts | |
| 78 | mov r3, r0 | |
| 79 | END(memset) |