mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-27 05:00:15 +00:00
688903eb3e
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
164 lines
2.7 KiB
ArmAsm
164 lines
2.7 KiB
ArmAsm
/* strcpy/stpcpy implementation for i586.
|
|
Copyright (C) 1997-2018 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <sysdep.h>
|
|
#include "asm-syntax.h"
|
|
|
|
#define PARMS 4+12 /* space for 3 saved regs */
|
|
#define RTN PARMS
|
|
#define DEST RTN
|
|
#define SRC DEST+4
|
|
|
|
#ifndef USE_AS_STPCPY
|
|
# define STRCPY strcpy
|
|
#endif
|
|
|
|
#define magic 0xfefefeff
|
|
|
|
.text
|
|
ENTRY (STRCPY)
|
|
|
|
pushl %edi
|
|
cfi_adjust_cfa_offset (4)
|
|
pushl %esi
|
|
cfi_adjust_cfa_offset (4)
|
|
pushl %ebx
|
|
cfi_adjust_cfa_offset (4)
|
|
|
|
movl DEST(%esp), %edi
|
|
cfi_rel_offset (edi, 8)
|
|
movl SRC(%esp), %esi
|
|
cfi_rel_offset (esi, 4)
|
|
|
|
xorl %eax, %eax
|
|
leal -1(%esi), %ecx
|
|
|
|
movl $magic, %ebx
|
|
cfi_rel_offset (ebx, 0)
|
|
andl $3, %ecx
|
|
|
|
cmpb $2, %cl
|
|
je L(Src2)
|
|
ja L(Src3)
|
|
cmpb $1, %cl
|
|
je L(Src1)
|
|
|
|
L(Src0):
|
|
orb (%esi), %al
|
|
jz L(end)
|
|
stosb
|
|
xorl %eax, %eax
|
|
incl %esi
|
|
|
|
L(Src1):
|
|
orb (%esi), %al
|
|
jz L(end)
|
|
stosb
|
|
xorl %eax, %eax
|
|
incl %esi
|
|
|
|
L(Src2):
|
|
orb (%esi), %al
|
|
jz L(end)
|
|
stosb
|
|
xorl %eax, %eax
|
|
incl %esi
|
|
|
|
L(Src3):
|
|
movl (%esi), %ecx
|
|
leal 4(%esi),%esi
|
|
|
|
subl %ecx, %eax
|
|
addl %ebx, %ecx
|
|
|
|
decl %eax
|
|
jnc L(3)
|
|
|
|
movl %ecx, %edx
|
|
xorl %ecx, %eax
|
|
|
|
subl %ebx, %edx
|
|
andl $~magic, %eax
|
|
|
|
jne L(4)
|
|
|
|
movl %edx, (%edi)
|
|
leal 4(%edi),%edi
|
|
|
|
jmp L(Src3)
|
|
|
|
L(3): movl %ecx, %edx
|
|
|
|
subl %ebx, %edx
|
|
|
|
L(4): movb %dl, (%edi)
|
|
testb %dl, %dl
|
|
|
|
movl %edx, %eax
|
|
jz L(end2)
|
|
|
|
shrl $16, %eax
|
|
movb %dh, 1(%edi)
|
|
#ifdef USE_AS_STPCPY
|
|
addl $1, %edi
|
|
#endif
|
|
|
|
cmpb $0, %dh
|
|
jz L(end2)
|
|
|
|
#ifdef USE_AS_STPCPY
|
|
movb %al, 1(%edi)
|
|
addl $1, %edi
|
|
|
|
cmpb $0, %al
|
|
jz L(end2)
|
|
|
|
addl $1, %edi
|
|
#else
|
|
movb %al, 2(%edi)
|
|
testb %al, %al
|
|
|
|
leal 3(%edi), %edi
|
|
jz L(end2)
|
|
#endif
|
|
|
|
L(end): movb %ah, (%edi)
|
|
|
|
L(end2):
|
|
#ifdef USE_AS_STPCPY
|
|
movl %edi, %eax
|
|
#else
|
|
movl DEST(%esp), %eax
|
|
#endif
|
|
popl %ebx
|
|
cfi_adjust_cfa_offset (-4)
|
|
cfi_restore (ebx)
|
|
popl %esi
|
|
cfi_adjust_cfa_offset (-4)
|
|
cfi_restore (esi)
|
|
popl %edi
|
|
cfi_adjust_cfa_offset (-4)
|
|
cfi_restore (edi)
|
|
|
|
ret
|
|
END (STRCPY)
|
|
#ifndef USE_AS_STPCPY
|
|
libc_hidden_builtin_def (strcpy)
|
|
#endif
|