1 | /* memset/bzero -- set memory area to CH/0 |
2 | Optimized version for x86-64. |
3 | Copyright (C) 2002-2016 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 | |
45 | libc_hidden_builtin_def (memset) |
46 | |
47 | #if defined SHARED && IS_IN (libc) && !defined USE_MULTIARCH |
48 | strong_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 | |