1/* memset/bzero -- set memory area to CH/0
2 Optimized version for x86-64.
3 Copyright (C) 2002-2017 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 <http://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 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 SECTION(p) p
37
38#ifndef MEMSET_SYMBOL
39# define MEMSET_CHK_SYMBOL(p,s) p
40# define MEMSET_SYMBOL(p,s) memset
41#endif
42
43#include "multiarch/memset-vec-unaligned-erms.S"
44
45libc_hidden_builtin_def (memset)
46
47#if defined SHARED && IS_IN (libc) && !defined USE_MULTIARCH
48strong_alias (__memset_chk, __memset_zero_constant_len_parameter)
49 .section .gnu.warning.__memset_zero_constant_len_parameter
50 .string "memset used with constant zero length parameter; this could be due to transposed parameters"
51#endif
52