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Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [x86/] [boot/] [copy.S] - Blame information for rev 3

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Line No. Rev Author Line
1 3 xianfeng 
/* ----------------------------------------------------------------------- *
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 *
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 *   Copyright (C) 1991, 1992 Linus Torvalds
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 *   Copyright 2007 rPath, Inc. - All Rights Reserved
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 *
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 *   This file is part of the Linux kernel, and is made available under
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 *   the terms of the GNU General Public License version 2.
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 *
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 * ----------------------------------------------------------------------- */
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/*
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 * arch/i386/boot/copy.S
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 *
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 * Memory copy routines
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 */
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        .code16gcc
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        .text
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        .globl  memcpy
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        .type   memcpy, @function
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memcpy:
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        pushw   %si
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        pushw   %di
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        movw    %ax, %di
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        movw    %dx, %si
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        pushw   %cx
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        shrw    $2, %cx
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        rep; movsl
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        popw    %cx
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        andw    $3, %cx
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        rep; movsb
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        popw    %di
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        popw    %si
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        ret
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        .size   memcpy, .-memcpy
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        .globl  memset
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        .type   memset, @function
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memset:
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        pushw   %di
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        movw    %ax, %di
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        movzbl  %dl, %eax
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        imull   $0x01010101,%eax
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        pushw   %cx
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        shrw    $2, %cx
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        rep; stosl
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        popw    %cx
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        andw    $3, %cx
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        rep; stosb
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        popw    %di
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        ret
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        .size   memset, .-memset
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        .globl  copy_from_fs
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        .type   copy_from_fs, @function
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copy_from_fs:
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        pushw   %ds
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        pushw   %fs
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        popw    %ds
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        call    memcpy
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        popw    %ds
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        ret
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        .size   copy_from_fs, .-copy_from_fs
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        .globl  copy_to_fs
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        .type   copy_to_fs, @function
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copy_to_fs:
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        pushw   %es
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        pushw   %fs
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        popw    %es
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        call    memcpy
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        popw    %es
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        ret
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        .size   copy_to_fs, .-copy_to_fs
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#if 0 /* Not currently used, but can be enabled as needed */
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        .globl  copy_from_gs
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        .type   copy_from_gs, @function
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copy_from_gs:
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        pushw   %ds
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        pushw   %gs
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        popw    %ds
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        call    memcpy
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        popw    %ds
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        ret
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        .size   copy_from_gs, .-copy_from_gs
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        .globl  copy_to_gs
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        .type   copy_to_gs, @function
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copy_to_gs:
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        pushw   %es
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        pushw   %gs
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        popw    %es
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        call    memcpy
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        popw    %es
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        ret
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        .size   copy_to_gs, .-copy_to_gs
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#endif

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