1/* memset/bzero -- set memory area to CH/0
2 Optimized version for x86-64.
3 Copyright (C) 2002-2021 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
19
20#include <sysdep.h>
21
22#define VEC_SIZE 16
23#define VEC(i) xmm##i
24/* Don't use movups and movaps since it will get larger nop paddings for
25 alignment. */
26#define VMOVU movdqu
27#define VMOVA movdqa
28
29#define MEMSET_VDUP_TO_VEC0_AND_SET_RETURN(d, r) \
30 movd d, %xmm0; \
31 movq r, %rax; \
32 punpcklbw %xmm0, %xmm0; \
33 punpcklwd %xmm0, %xmm0; \
34 pshufd $0, %xmm0, %xmm0
35
36#define WMEMSET_VDUP_TO_VEC0_AND_SET_RETURN(d, r) \
37 movd d, %xmm0; \
38 movq r, %rax; \
39 pshufd $0, %xmm0, %xmm0
40
41#define SECTION(p) p
42
43#ifndef MEMSET_SYMBOL
44# define MEMSET_CHK_SYMBOL(p,s) p
45# define MEMSET_SYMBOL(p,s) memset
46#endif
47
48#ifndef WMEMSET_SYMBOL
49# define WMEMSET_CHK_SYMBOL(p,s) p
50# define WMEMSET_SYMBOL(p,s) __wmemset
51#endif
52
53#include "multiarch/memset-vec-unaligned-erms.S"
54
55libc_hidden_builtin_def (memset)
56
57#if IS_IN (libc)
58libc_hidden_def (__wmemset)
59weak_alias (__wmemset, wmemset)
60libc_hidden_weak (wmemset)
61#endif
62