100 lines
1.6 KiB
ArmAsm
100 lines
1.6 KiB
ArmAsm
|
/* ----------------------------------------------------------------------- *
|
||
|
|
*
|
||
|
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
||
|
|
* Copyright 2007 rPath, Inc. - All Rights Reserved
|
||
|
|
*
|
||
|
|
* This file is part of the Linux kernel, and is made available under
|
||
|
|
* the terms of the GNU General Public License version 2.
|
||
|
|
*
|
||
|
|
* ----------------------------------------------------------------------- */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Memory copy routines
|
||
|
|
*/
|
||
|
|
|
||
|
|
.code16gcc
|
||
|
|
.text
|
||
|
|
|
||
|
|
.globl memcpy
|
||
|
|
.type memcpy, @function
|
||
|
|
memcpy:
|
||
|
|
pushw %si
|
||
|
|
pushw %di
|
||
|
|
movw %ax, %di
|
||
|
|
movw %dx, %si
|
||
|
|
pushw %cx
|
||
|
|
shrw $2, %cx
|
||
|
|
rep; movsl
|
||
|
|
popw %cx
|
||
|
|
andw $3, %cx
|
||
|
|
rep; movsb
|
||
|
|
popw %di
|
||
|
|
popw %si
|
||
|
|
ret
|
||
|
|
.size memcpy, .-memcpy
|
||
|
|
|
||
|
|
.globl memset
|
||
|
|
.type memset, @function
|
||
|
|
memset:
|
||
|
|
pushw %di
|
||
|
|
movw %ax, %di
|
||
|
|
movzbl %dl, %eax
|
||
|
|
imull $0x01010101,%eax
|
||
|
|
pushw %cx
|
||
|
|
shrw $2, %cx
|
||
|
|
rep; stosl
|
||
|
|
popw %cx
|
||
|
|
andw $3, %cx
|
||
|
|
rep; stosb
|
||
|
|
popw %di
|
||
|
|
ret
|
||
|
|
.size memset, .-memset
|
||
|
|
|
||
|
|
.globl copy_from_fs
|
||
|
|
.type copy_from_fs, @function
|
||
|
|
copy_from_fs:
|
||
|
|
pushw %ds
|
||
|
|
pushw %fs
|
||
|
|
popw %ds
|
||
|
|
call memcpy
|
||
|
|
popw %ds
|
||
|
|
ret
|
||
|
|
.size copy_from_fs, .-copy_from_fs
|
||
|
|
|
||
|
|
.globl copy_to_fs
|
||
|
|
.type copy_to_fs, @function
|
||
|
|
copy_to_fs:
|
||
|
|
pushw %es
|
||
|
|
pushw %fs
|
||
|
|
popw %es
|
||
|
|
call memcpy
|
||
|
|
popw %es
|
||
|
|
ret
|
||
|
|
.size copy_to_fs, .-copy_to_fs
|
||
|
|
|
||
|
|
#if 0 /* Not currently used, but can be enabled as needed */
|
||
|
|
|
||
|
|
.globl copy_from_gs
|
||
|
|
.type copy_from_gs, @function
|
||
|
|
copy_from_gs:
|
||
|
|
pushw %ds
|
||
|
|
pushw %gs
|
||
|
|
popw %ds
|
||
|
|
call memcpy
|
||
|
|
popw %ds
|
||
|
|
ret
|
||
|
|
.size copy_from_gs, .-copy_from_gs
|
||
|
|
.globl copy_to_gs
|
||
|
|
|
||
|
|
.type copy_to_gs, @function
|
||
|
|
copy_to_gs:
|
||
|
|
pushw %es
|
||
|
|
pushw %gs
|
||
|
|
popw %es
|
||
|
|
call memcpy
|
||
|
|
popw %es
|
||
|
|
ret
|
||
|
|
.size copy_to_gs, .-copy_to_gs
|
||
|
|
|
||
|
|
#endif
|