1 /* memcpy with REP MOVSB/STOSB
2 Copyright (C) 2015-2017 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 <http://www.gnu.org/licenses/>. */
20 #include "asm-syntax.h"
23 # define MEMCPY memcpy
24 # define MEMCPY_CHK __memcpy_chk
37 #define CFI_PUSH(REG) \
38 cfi_adjust_cfa_offset (4); \
39 cfi_rel_offset (REG, 0)
41 #define CFI_POP(REG) \
42 cfi_adjust_cfa_offset (-4); \
45 #define PUSH(REG) pushl REG; CFI_PUSH (REG)
46 #define POP(REG) popl REG; CFI_POP (REG)
49 #if defined SHARED && IS_IN (libc) && !defined USE_AS_BCOPY
53 jb HIDDEN_JUMPTARGET (__chk_fail)
70 je L(bwd_write_0bytes)
80 lea -1(%edi,%ecx), %edi
81 lea -1(%esi,%ecx), %esi
94 libc_hidden_builtin_def (MEMCPY)