69 lines
2.7 KiB
NASM
69 lines
2.7 KiB
NASM
;*****************************************************************************
|
|
;*
|
|
;* Open Watcom Project
|
|
;*
|
|
;* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
|
|
;*
|
|
;* ========================================================================
|
|
;*
|
|
;* This file contains Original Code and/or Modifications of Original
|
|
;* Code as defined in and that are subject to the Sybase Open Watcom
|
|
;* Public License version 1.0 (the 'License'). You may not use this file
|
|
;* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
|
|
;* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
|
|
;* provided with the Original Code and Modifications, and is also
|
|
;* available at www.sybase.com/developer/opensource.
|
|
;*
|
|
;* The Original Code and all software distributed under the License are
|
|
;* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
|
|
;* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
|
|
;* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
|
|
;* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
|
|
;* NON-INFRINGEMENT. Please see the License for the specific language
|
|
;* governing rights and limitations under the License.
|
|
;*
|
|
;* ========================================================================
|
|
;*
|
|
;* Description: WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
|
|
;* DESCRIBE IT HERE!
|
|
;*
|
|
;*****************************************************************************
|
|
|
|
|
|
;
|
|
; char *__COPY( char *dst, char *src, unsigned len );
|
|
;
|
|
;
|
|
include mdef.inc
|
|
|
|
name __copy
|
|
_TEXT segment use32 para public 'CODE'
|
|
assume cs:_TEXT
|
|
|
|
public __COPY
|
|
public __COPY_
|
|
|
|
__COPY proc near
|
|
__COPY_ proc near
|
|
push edi ; save regs
|
|
push esi ; ...
|
|
push ecx ; ...
|
|
mov edi,16+0[esp] ; get dst
|
|
mov esi,16+4[esp] ; get src
|
|
mov ecx,16+8[esp] ; get len
|
|
mov eax,edi ; return with dst ptr in eax
|
|
shr ecx,2 ; calc. # of dwords
|
|
rep movsd ; do the copy
|
|
mov ecx,16+8[esp] ; get len
|
|
and ecx,3 ; plus extra bytes
|
|
rep movsb ; do the copy
|
|
pop ecx ; restore regs
|
|
pop esi ; ...
|
|
pop edi ; ...
|
|
ret 12 ; return and remove parms
|
|
__COPY_ endp
|
|
__COPY endp
|
|
|
|
_TEXT ends
|
|
end
|