1 /* Copyright (C) 1998-2023 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library. If not, see
16 <https://www.gnu.org/licenses/>. */
18 /* Thumb requires excessive IT insns here. */
25 /* void *memset (dstpp, c, len) */
30 bcc 2f @ less than 8 bytes to move
33 tst r3, #3 @ aligned yet?
38 and r1, r1, #255 @ clear any sign bits
39 orr r1, r1, r1, lsl $8
40 orr r1, r1, r1, lsl $16
45 stmiacs r3!, {r1, ip} @ store up to 32 bytes per loop iteration
56 subs r2, r2, #1 @ store up to 4 bytes per loop iteration
68 libc_hidden_builtin_def (memset)