1/* Optimized memmove for x86-64.
2 Copyright (C) 2016-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
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.
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
13 Lesser General Public License for more details.
14
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/>. */
18
19#include <sysdep.h>
20
21#define VEC_SIZE 16
22#define VEC(i) xmm##i
23#define PREFETCHNT prefetchnta
24#define VMOVNT movntdq
25/* Use movups and movaps for smaller code sizes. */
26#define VMOVU movups
27#define VMOVA movaps
28
29#define SECTION(p) p
30
31#ifdef USE_MULTIARCH
32# if !IS_IN (libc)
33# define MEMCPY_SYMBOL(p,s) memcpy
34# endif
35#else
36# if defined SHARED && IS_IN (libc)
37# define MEMCPY_SYMBOL(p,s) __memcpy
38# else
39# define MEMCPY_SYMBOL(p,s) memcpy
40# endif
41#endif
42#if !defined USE_MULTIARCH || !IS_IN (libc)
43# define MEMPCPY_SYMBOL(p,s) __mempcpy
44#endif
45#ifndef MEMMOVE_SYMBOL
46# define MEMMOVE_CHK_SYMBOL(p,s) p
47# define MEMMOVE_SYMBOL(p,s) memmove
48#endif
49
50#include "multiarch/memmove-vec-unaligned-erms.S"
51
52#ifndef USE_MULTIARCH
53libc_hidden_builtin_def (memmove)
54# if defined SHARED && IS_IN (libc)
55strong_alias (memmove, __memcpy)
56libc_hidden_ver (memmove, memcpy)
57# endif
58libc_hidden_def (__mempcpy)
59weak_alias (__mempcpy, mempcpy)
60libc_hidden_builtin_def (mempcpy)
61
62# if defined SHARED && IS_IN (libc)
63# undef memcpy
64# include <shlib-compat.h>
65versioned_symbol (libc, __memcpy, memcpy, GLIBC_2_14);
66
67# if SHLIB_COMPAT (libc, GLIBC_2_2_5, GLIBC_2_14)
68compat_symbol (libc, memmove, memcpy, GLIBC_2_2_5);
69# endif
70# endif
71#endif
72