Initial Source Code commit
Initial commit of original Tiberian Dawn and Red Alert source code converted to build as DLLs, and compatible with the release version of Command & Conquer Remastered.
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PG-SteveT
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167
REDALERT/DPMI.CPP
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167
REDALERT/DPMI.CPP
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//
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// Copyright 2020 Electronic Arts Inc.
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//
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// TiberianDawn.DLL and RedAlert.dll and corresponding source code is free
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// software: you can redistribute it and/or modify it under the terms of
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// the GNU General Public License as published by the Free Software Foundation,
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// either version 3 of the License, or (at your option) any later version.
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// TiberianDawn.DLL and RedAlert.dll and corresponding source code is distributed
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// in the hope that it will be useful, but with permitted additional restrictions
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// under Section 7 of the GPL. See the GNU General Public License in LICENSE.TXT
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// distributed with this program. You should have received a copy of the
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// GNU General Public License along with permitted additional restrictions
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// with this program. If not, see https://github.com/electronicarts/CnC_Remastered_Collection
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/* $Header: F:\projects\c&c0\vcs\code\dpmi.cpv 4.41 04 Jul 1996 16:12:42 JOE_BOSTIC $ */
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/***********************************************************************************************
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*** 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 ***
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***********************************************************************************************
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* *
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* Project Name : Command & Conquer *
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* *
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* File Name : DPMI.CPP *
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* *
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* Programmer : Joe L. Bostic *
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* *
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* Start Date : July 2, 1994 *
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* *
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* Last Update : July 2, 1994 [JLB] *
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* *
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*---------------------------------------------------------------------------------------------*
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* Functions: *
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* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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#if (0)
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#ifdef __FLAT__
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#pragma inline
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#endif
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//#include "function.h"
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#include "dpmi.h"
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#ifndef __FLAT__
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void DOSSegmentClass::Swap(DOSSegmentClass &src, int soffset, DOSSegmentClass &dest, int doffset, int size)
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{
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if (!size) return;
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unsigned short ssel = src.Selector;
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unsigned short dsel = dest.Selector;
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asm {
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push es
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push ds
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mov si,soffset
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mov di,doffset
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mov cx,size
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mov ax,ssel
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mov dx,dsel
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mov ds,ax
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mov es,dx
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}
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again:
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asm {
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mov al,ds:[si]
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mov ah,es:[di]
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mov ds:[si],ah
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mov es:[di],al
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inc di
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inc si
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dec cx
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jnz again
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pop ds
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pop es
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}
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}
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#endif
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void DOSSegmentClass::Swap(DOSSegmentClass &src, int soffset, DOSSegmentClass &dest, int doffset, int size)
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{
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extern void dss_swap(char *src, char *dest, int size);
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#pragma aux dss_swap = \
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"again: mov al,[esi]" \
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"mov ah,[edi]" \
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"mov [esi],ah" \
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"stosb" \
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"inc esi" \
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"loop again" \
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parm [esi] [edi] [ecx] \
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modify [ax];
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if (!size) return;
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dss_swap((char *)(src.Selector + soffset), (char *)(dest.Selector + doffset), size);
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}
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#ifdef OBSOLETE
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void DOSSegmentClass::Copy(DOSSegmentClass &src, int soffset, DOSSegmentClass &dest, int doffset, int size)
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{
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extern void dss_copy(char *src, char *dest, int size);
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#pragma aux dss_copy = \
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"mov ebx,ecx" \
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"shr ecx,2" \
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"jecxz copskip1" \
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"rep movsd" \
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"copskip1: mov ecx,ebx" \
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"and ecx,3" \
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"jecxz copskip2" \
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"rep movsb" \
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"copskip2:" \
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parm [esi edi ecx] \
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modify [ebx];
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if (!size) return;
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dss_copy((char *)(src.Selector + soffset), (char *)(dest.Selector + doffset), size);
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}
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#endif
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#ifdef OBSOLETE
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void DOSSegmentClass::Copy_To(void *source, int dest, int size)
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{
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extern void dss_copy_to(void *src, (void *)dest, int size);
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#pragma aux dss_copy_to = \
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"mov ebx,ecx" \
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"shr ecx,2" \
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"jecxz cop2skip1" \
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"rep movsd" \
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"cop2skip1: mov ecx,ebx" \
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"and ecx,3" \
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"jecxz cop2skip2" \
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"rep movsb" \
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"cop2skip2:" \
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parm [esi edi ecx] \
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modify [ebx];
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if (!size) return;
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dss_copy_to(src, (void *)(Selector + dest), size);
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}
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#endif
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#ifdef OBSOLETE
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void DOSSegmentClass::Copy_From(void *dest, int source, int size)
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{
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extern void dss_copy_from(void *dest, (void *)source, int size);
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#pragma aux dss_copy_from = \
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"mov ebx,ecx" \
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"shr ecx,2" \
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"jecxz copfskip1" \
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"rep movsd" \
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"copfskip1: mov ecx,ebx" \
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"and ecx,3" \
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"jecxz copfskip2" \
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"rep movsb" \
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"copfskip2:" \
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parm [edi esi ecx] \
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modify [ebx];
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if (!size) return;
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dss_copy_from(dest, (void *)(Selector + source), size);
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}
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#endif
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#endif
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