DPMI.CPP (5208B)
1 // 2 // Copyright 2020 Electronic Arts Inc. 3 // 4 // TiberianDawn.DLL and RedAlert.dll and corresponding source code is free 5 // software: you can redistribute it and/or modify it under the terms of 6 // the GNU General Public License as published by the Free Software Foundation, 7 // either version 3 of the License, or (at your option) any later version. 8 9 // TiberianDawn.DLL and RedAlert.dll and corresponding source code is distributed 10 // in the hope that it will be useful, but with permitted additional restrictions 11 // under Section 7 of the GPL. See the GNU General Public License in LICENSE.TXT 12 // distributed with this program. You should have received a copy of the 13 // GNU General Public License along with permitted additional restrictions 14 // with this program. If not, see https://github.com/electronicarts/CnC_Remastered_Collection 15 16 /* $Header: F:\projects\c&c0\vcs\code\dpmi.cpv 4.41 04 Jul 1996 16:12:42 JOE_BOSTIC $ */ 17 /*********************************************************************************************** 18 *** 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 *** 19 *********************************************************************************************** 20 * * 21 * Project Name : Command & Conquer * 22 * * 23 * File Name : DPMI.CPP * 24 * * 25 * Programmer : Joe L. Bostic * 26 * * 27 * Start Date : July 2, 1994 * 28 * * 29 * Last Update : July 2, 1994 [JLB] * 30 * * 31 *---------------------------------------------------------------------------------------------* 32 * Functions: * 33 * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ 34 #if (0) 35 #ifdef __FLAT__ 36 #pragma inline 37 #endif 38 39 //#include "function.h" 40 #include "dpmi.h" 41 42 #ifndef __FLAT__ 43 44 void DOSSegmentClass::Swap(DOSSegmentClass &src, int soffset, DOSSegmentClass &dest, int doffset, int size) 45 { 46 if (!size) return; 47 48 unsigned short ssel = src.Selector; 49 unsigned short dsel = dest.Selector; 50 51 asm { 52 push es 53 push ds 54 55 mov si,soffset 56 mov di,doffset 57 mov cx,size 58 mov ax,ssel 59 mov dx,dsel 60 mov ds,ax 61 mov es,dx 62 } 63 again: 64 asm { 65 mov al,ds:[si] 66 mov ah,es:[di] 67 mov ds:[si],ah 68 mov es:[di],al 69 inc di 70 inc si 71 dec cx 72 jnz again 73 74 pop ds 75 pop es 76 } 77 } 78 #endif 79 80 81 void DOSSegmentClass::Swap(DOSSegmentClass &src, int soffset, DOSSegmentClass &dest, int doffset, int size) 82 { 83 extern void dss_swap(char *src, char *dest, int size); 84 85 #pragma aux dss_swap = \ 86 "again: mov al,[esi]" \ 87 "mov ah,[edi]" \ 88 "mov [esi],ah" \ 89 "stosb" \ 90 "inc esi" \ 91 "loop again" \ 92 parm [esi] [edi] [ecx] \ 93 modify [ax]; 94 95 if (!size) return; 96 dss_swap((char *)(src.Selector + soffset), (char *)(dest.Selector + doffset), size); 97 } 98 99 #ifdef OBSOLETE 100 void DOSSegmentClass::Copy(DOSSegmentClass &src, int soffset, DOSSegmentClass &dest, int doffset, int size) 101 { 102 extern void dss_copy(char *src, char *dest, int size); 103 #pragma aux dss_copy = \ 104 "mov ebx,ecx" \ 105 "shr ecx,2" \ 106 "jecxz copskip1" \ 107 "rep movsd" \ 108 "copskip1: mov ecx,ebx" \ 109 "and ecx,3" \ 110 "jecxz copskip2" \ 111 "rep movsb" \ 112 "copskip2:" \ 113 parm [esi edi ecx] \ 114 modify [ebx]; 115 116 if (!size) return; 117 dss_copy((char *)(src.Selector + soffset), (char *)(dest.Selector + doffset), size); 118 } 119 #endif 120 121 #ifdef OBSOLETE 122 void DOSSegmentClass::Copy_To(void *source, int dest, int size) 123 { 124 extern void dss_copy_to(void *src, (void *)dest, int size); 125 126 #pragma aux dss_copy_to = \ 127 "mov ebx,ecx" \ 128 "shr ecx,2" \ 129 "jecxz cop2skip1" \ 130 "rep movsd" \ 131 "cop2skip1: mov ecx,ebx" \ 132 "and ecx,3" \ 133 "jecxz cop2skip2" \ 134 "rep movsb" \ 135 "cop2skip2:" \ 136 parm [esi edi ecx] \ 137 modify [ebx]; 138 139 if (!size) return; 140 dss_copy_to(src, (void *)(Selector + dest), size); 141 142 } 143 #endif 144 145 #ifdef OBSOLETE 146 void DOSSegmentClass::Copy_From(void *dest, int source, int size) 147 { 148 extern void dss_copy_from(void *dest, (void *)source, int size); 149 150 #pragma aux dss_copy_from = \ 151 "mov ebx,ecx" \ 152 "shr ecx,2" \ 153 "jecxz copfskip1" \ 154 "rep movsd" \ 155 "copfskip1: mov ecx,ebx" \ 156 "and ecx,3" \ 157 "jecxz copfskip2" \ 158 "rep movsb" \ 159 "copfskip2:" \ 160 parm [edi esi ecx] \ 161 modify [ebx]; 162 163 if (!size) return; 164 dss_copy_from(dest, (void *)(Selector + source), size); 165 } 166 #endif 167 #endif