CnC_Remastered_Collection/TIBERIANDAWN/DPMI.CPP

172 lines
5.1 KiB
C++

//
// Copyright 2020 Electronic Arts Inc.
//
// TiberianDawn.DLL and RedAlert.dll and corresponding source code is free
// software: you can redistribute it and/or modify it under the terms of
// the GNU General Public License as published by the Free Software Foundation,
// either version 3 of the License, or (at your option) any later version.
// TiberianDawn.DLL and RedAlert.dll and corresponding source code is distributed
// in the hope that it will be useful, but with permitted additional restrictions
// under Section 7 of the GPL. See the GNU General Public License in LICENSE.TXT
// distributed with this program. You should have received a copy of the
// GNU General Public License along with permitted additional restrictions
// with this program. If not, see https://github.com/electronicarts/CnC_Remastered_Collection
/* $Header: F:\projects\c&c\vcs\code\dpmi.cpv 2.17 16 Oct 1995 16:49:36 JOE_BOSTIC $ */
/***********************************************************************************************
*** C O N F I D E N T I A L --- W E S T W O O D S T U D I O S ***
***********************************************************************************************
* *
* Project Name : Command & Conquer *
* *
* File Name : DPMI.CPP *
* *
* Programmer : Joe L. Bostic *
* *
* Start Date : July 2, 1994 *
* *
* Last Update : July 2, 1994 [JLB] *
* *
*---------------------------------------------------------------------------------------------*
* Functions: *
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
//PG_TO_FIX
#if (0)
#ifdef __FLAT__
#pragma inline
#endif
#include "function.h"
#include "dpmi.h"
#ifndef __FLAT__
void DOSSegmentClass::Swap(DOSSegmentClass &src, int soffset, DOSSegmentClass &dest, int doffset, int size)
{
if (!size) return;
unsigned short ssel = src.Selector;
unsigned short dsel = dest.Selector;
asm {
push es
push ds
mov si,soffset
mov di,doffset
mov cx,size
mov ax,ssel
mov dx,dsel
mov ds,ax
mov es,dx
}
again:
asm {
mov al,ds:[si]
mov ah,es:[di]
mov ds:[si],ah
mov es:[di],al
inc di
inc si
dec cx
jnz again
pop ds
pop es
}
}
#endif
void DOSSegmentClass::Swap(DOSSegmentClass &src, int soffset, DOSSegmentClass &dest, int doffset, int size)
{
extern void dss_swap(char *src, char *dest, int size);
#pragma aux dss_swap = \
"again: mov al,[esi]" \
"mov ah,[edi]" \
"mov [esi],ah" \
"stosb" \
"inc esi" \
"loop again" \
parm [esi] [edi] [ecx] \
modify [ax];
if (!size) return;
dss_swap((char *)(src.Selector + soffset), (char *)(dest.Selector + doffset), size);
}
#ifdef OBSOLETE
void DOSSegmentClass::Copy(DOSSegmentClass &src, int soffset, DOSSegmentClass &dest, int doffset, int size)
{
extern void dss_copy(char *src, char *dest, int size);
#pragma aux dss_copy = \
"mov ebx,ecx" \
"shr ecx,2" \
"jecxz copskip1" \
"rep movsd" \
"copskip1: mov ecx,ebx" \
"and ecx,3" \
"jecxz copskip2" \
"rep movsb" \
"copskip2:" \
parm [esi edi ecx] \
modify [ebx];
if (!size) return;
dss_copy((char *)(src.Selector + soffset), (char *)(dest.Selector + doffset), size);
}
#endif
#ifdef OBSOLETE
void DOSSegmentClass::Copy_To(void *source, int dest, int size)
{
extern void dss_copy_to(void *src, (void *)dest, int size);
#pragma aux dss_copy_to = \
"mov ebx,ecx" \
"shr ecx,2" \
"jecxz cop2skip1" \
"rep movsd" \
"cop2skip1: mov ecx,ebx" \
"and ecx,3" \
"jecxz cop2skip2" \
"rep movsb" \
"cop2skip2:" \
parm [esi edi ecx] \
modify [ebx];
if (!size) return;
dss_copy_to(src, (void *)(Selector + dest), size);
}
#endif
#ifdef OBSOLETE
void DOSSegmentClass::Copy_From(void *dest, int source, int size)
{
extern void dss_copy_from(void *dest, (void *)source, int size);
#pragma aux dss_copy_from = \
"mov ebx,ecx" \
"shr ecx,2" \
"jecxz copfskip1" \
"rep movsd" \
"copfskip1: mov ecx,ebx" \
"and ecx,3" \
"jecxz copfskip2" \
"rep movsb" \
"copfskip2:" \
parm [edi esi ecx] \
modify [ebx];
if (!size) return;
dss_copy_from(dest, (void *)(Selector + source), size);
}
#endif
#endif //PG_TO_FIX