1 /* memcpy/mempcpy/memmove implement with rep movsb
2 Copyright (C) 2022-2024 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
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.
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
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
22 #if defined USE_MULTIARCH && IS_IN (libc)
24 ENTRY (__mempcpy_chk_erms)
26 jb HIDDEN_JUMPTARGET (__chk_fail)
27 END (__mempcpy_chk_erms)
29 /* Only used to measure performance of REP MOVSB. */
30 ENTRY (__mempcpy_erms)
32 /* Skip zero length. */
39 ENTRY (__memmove_chk_erms)
41 jb HIDDEN_JUMPTARGET (__chk_fail)
42 END (__memmove_chk_erms)
44 ENTRY (__memmove_erms)
46 /* Skip zero length. */
53 /* Source == destination is less common. */
55 lea (%rsi,%rcx), %RDX_LP
63 leaq -1(%rdi,%rcx), %rdi
64 leaq -1(%rsi,%rcx), %rsi
70 strong_alias (__memmove_erms, __memcpy_erms)
71 strong_alias (__memmove_chk_erms, __memcpy_chk_erms)