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|
; $Id: fmemcpy.asm $
;; @file
; Compiler support routines.
;
;
; Copyright (C) 2012-2019 Oracle Corporation
;
; This file is part of VirtualBox Open Source Edition (OSE), as
; available from http://www.virtualbox.org. This file is free software;
; you can redistribute it and/or modify it under the terms of the GNU
; General Public License (GPL) as published by the Free Software
; Foundation, in version 2 as it comes in the "COPYING" file of the
; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
;
;*******************************************************************************
;* Exported Symbols *
;*******************************************************************************
public _fmemcpy_
.8086
_TEXT segment public 'CODE' use16
assume cs:_TEXT
;;
; memcpy taking far pointers.
;
; cx, es may be modified; si, di are preserved
;
; @returns dx:ax unchanged.
; @param dx:ax Pointer to the destination memory.
; @param cx:bx Pointer to the source memory.
; @param sp+2 The number of bytes to copy (dw).
;
_fmemcpy_:
push bp
mov bp, sp
push di
push ds
push si
mov es, dx
mov di, ax
mov ds, cx
mov si, bx
mov cx, [bp + 4]
rep movsb
pop si
pop ds
pop di
mov sp, bp
pop bp
ret
_TEXT ends
end
|
