projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 118bad87 UD |
1 | /* Copy memory block and return pointer to following byte. |
| 2 | For Intel 80x86, x>=6. | |
| f21acc89 | 3 | This file is part of the GNU C Library. |
| 04277e02 | 4 | Copyright (C) 1998-2019 Free Software Foundation, Inc. |
| 118bad87 | 5 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. |
| f21acc89 UD |
6 | |
| 7 | The GNU C Library is free software; you can redistribute it and/or | |
| 41bdb6e2 AJ |
8 | modify it under the terms of the GNU Lesser General Public |
| 9 | License as published by the Free Software Foundation; either | |
| 10 | version 2.1 of the License, or (at your option) any later version. | |
| f21acc89 UD |
11 | |
| 12 | The GNU C Library is distributed in the hope that it will be useful, | |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 41bdb6e2 | 15 | Lesser General Public License for more details. |
| f21acc89 | 16 | |
| 41bdb6e2 | 17 | You should have received a copy of the GNU Lesser General Public |
| 59ba27a6 | 18 | License along with the GNU C Library; if not, see |
| 5a82c748 | 19 | <https://www.gnu.org/licenses/>. */ |
| f21acc89 | 20 | |
| 118bad87 UD |
21 | #include <sysdep.h> |
| 22 | #include "asm-syntax.h" | |
| f21acc89 | 23 | |
| 2366713d | 24 | #define PARMS 4 /* no space for saved regs */ |
| 3f02f778 | 25 | #define RTN PARMS |
| 2366713d JM |
26 | #define DEST RTN |
| 27 | #define SRC DEST+4 | |
| 28 | #define LEN SRC+4 | |
| f21acc89 | 29 | |
| 3f02f778 | 30 | .text |
| 4f41c682 | 31 | #if defined PIC && IS_IN (libc) |
| 3af48cbd | 32 | ENTRY_CHK (__mempcpy_chk) |
| b5cc329c UD |
33 | movl 12(%esp), %eax |
| 34 | cmpl %eax, 16(%esp) | |
| 35 | jb HIDDEN_JUMPTARGET (__chk_fail) | |
| 3af48cbd | 36 | END_CHK (__mempcpy_chk) |
| b5cc329c | 37 | #endif |
| 2366713d | 38 | ENTRY (__mempcpy) |
| 3f02f778 GM |
39 | |
| 40 | movl LEN(%esp), %ecx | |
| 118bad87 | 41 | movl %edi, %eax |
| 1ad9da69 | 42 | cfi_register (edi, eax) |
| 3f02f778 | 43 | movl DEST(%esp), %edi |
| 118bad87 | 44 | movl %esi, %edx |
| 1ad9da69 | 45 | cfi_register (esi, edx) |
| 3f02f778 | 46 | movl SRC(%esp), %esi |
| 118bad87 UD |
47 | cld |
| 48 | shrl $1, %ecx | |
| 49 | jnc 1f | |
| 50 | movsb | |
| 51 | 1: shrl $1, %ecx | |
| 52 | jnc 2f | |
| 53 | movsw | |
| 54 | 2: rep | |
| 55 | movsl | |
| 56 | xchgl %edi, %eax | |
| 1ad9da69 | 57 | cfi_restore (edi) |
| 118bad87 | 58 | movl %edx, %esi |
| 1ad9da69 | 59 | cfi_restore (esi) |
| 3f02f778 | 60 | |
| 2366713d JM |
61 | ret |
| 62 | END (__mempcpy) | |
| 63 | libc_hidden_def (__mempcpy) | |
| 64 | weak_alias (__mempcpy, mempcpy) | |
| 3dbfd811 | 65 | libc_hidden_builtin_def (mempcpy) |