| 1 | /* Copyright (C) 1999-2022 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library; if not, see |
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| 16 | <https://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | #include <sysdep.h> |
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| 19 | |
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| 20 | /* void *memset (t, c, len); */ |
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| 21 | |
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| 22 | ENTRY(memset) |
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| 23 | mov #12,r0 |
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| 24 | cmp/gt r6,r0 |
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| 25 | bt.s L_byte_loop_init |
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| 26 | mov r4,r7 |
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| 27 | |
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| 28 | extu.b r5,r5 |
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| 29 | swap.b r5,r1 |
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| 30 | or r1,r5 |
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| 31 | swap.w r5,r1 |
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| 32 | or r1,r5 |
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| 33 | |
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| 34 | mov r4,r0 |
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| 35 | tst #1,r0 |
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| 36 | bt L_wordalign |
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| 37 | |
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| 38 | mov.b r5,@r4 |
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| 39 | add #-1,r6 |
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| 40 | add #1,r4 |
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| 41 | mov r4,r0 |
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| 42 | |
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| 43 | .balignw 4,0x0009 |
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| 44 | L_wordalign: |
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| 45 | tst #2,r0 |
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| 46 | bt L_word_loop_init |
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| 47 | |
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| 48 | mov.w r5,@r4 |
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| 49 | add #-2,r6 |
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| 50 | add #2,r4 |
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| 51 | mov r4,r0 |
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| 52 | |
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| 53 | .balignw 4,0x0009 |
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| 54 | L_word_loop_init: |
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| 55 | mov r6,r3 |
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| 56 | shlr2 r3 |
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| 57 | mov #7,r0 |
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| 58 | shlr r3 |
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| 59 | and r0,r6 |
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| 60 | |
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| 61 | .balignw 4,0x0009 |
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| 62 | L_2word_loop: |
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| 63 | mov.l r5,@r4 |
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| 64 | dt r3 |
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| 65 | mov.l r5,@(4,r4) |
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| 66 | bf.s L_2word_loop |
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| 67 | add #8,r4 |
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| 68 | |
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| 69 | .balignw 4,0x0009 |
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| 70 | L_byte_loop_init: |
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| 71 | tst r6,r6 |
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| 72 | bt L_byte_exit |
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| 73 | |
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| 74 | .balignw 4,0x0009 |
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| 75 | L_byte_loop: |
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| 76 | mov.b r5,@r4 |
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| 77 | dt r6 |
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| 78 | bf.s L_byte_loop |
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| 79 | add #1,r4 |
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| 80 | |
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| 81 | .balignw 4,0x0009 |
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| 82 | L_byte_exit: |
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| 83 | rts |
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| 84 | mov r7,r0 |
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| 85 | END(memset) |
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| 86 | libc_hidden_builtin_def (memset) |
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| 87 | |
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