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src/cpu/modrm.cpp
00001 /*
00002  *  Copyright (C) 2002-2020  The DOSBox Team
00003  *
00004  *  This program is free software; you can redistribute it and/or modify
00005  *  it under the terms of the GNU General Public License as published by
00006  *  the Free Software Foundation; either version 2 of the License, or
00007  *  (at your option) any later version.
00008  *
00009  *  This program is distributed in the hope that it will be useful,
00010  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012  *  GNU General Public License for more details.
00013  *
00014  *  You should have received a copy of the GNU General Public License along
00015  *  with this program; if not, write to the Free Software Foundation, Inc.,
00016  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
00017  */
00018 
00019 #include "cpu.h"
00020 
00021 
00022 Bit8u * lookupRMregb[]=
00023 {
00024         &reg_al,&reg_al,&reg_al,&reg_al,&reg_al,&reg_al,&reg_al,&reg_al,
00025         &reg_cl,&reg_cl,&reg_cl,&reg_cl,&reg_cl,&reg_cl,&reg_cl,&reg_cl,
00026         &reg_dl,&reg_dl,&reg_dl,&reg_dl,&reg_dl,&reg_dl,&reg_dl,&reg_dl,
00027         &reg_bl,&reg_bl,&reg_bl,&reg_bl,&reg_bl,&reg_bl,&reg_bl,&reg_bl,
00028         &reg_ah,&reg_ah,&reg_ah,&reg_ah,&reg_ah,&reg_ah,&reg_ah,&reg_ah,
00029         &reg_ch,&reg_ch,&reg_ch,&reg_ch,&reg_ch,&reg_ch,&reg_ch,&reg_ch,
00030         &reg_dh,&reg_dh,&reg_dh,&reg_dh,&reg_dh,&reg_dh,&reg_dh,&reg_dh,
00031         &reg_bh,&reg_bh,&reg_bh,&reg_bh,&reg_bh,&reg_bh,&reg_bh,&reg_bh,
00032 
00033         &reg_al,&reg_al,&reg_al,&reg_al,&reg_al,&reg_al,&reg_al,&reg_al,
00034         &reg_cl,&reg_cl,&reg_cl,&reg_cl,&reg_cl,&reg_cl,&reg_cl,&reg_cl,
00035         &reg_dl,&reg_dl,&reg_dl,&reg_dl,&reg_dl,&reg_dl,&reg_dl,&reg_dl,
00036         &reg_bl,&reg_bl,&reg_bl,&reg_bl,&reg_bl,&reg_bl,&reg_bl,&reg_bl,
00037         &reg_ah,&reg_ah,&reg_ah,&reg_ah,&reg_ah,&reg_ah,&reg_ah,&reg_ah,
00038         &reg_ch,&reg_ch,&reg_ch,&reg_ch,&reg_ch,&reg_ch,&reg_ch,&reg_ch,
00039         &reg_dh,&reg_dh,&reg_dh,&reg_dh,&reg_dh,&reg_dh,&reg_dh,&reg_dh,
00040         &reg_bh,&reg_bh,&reg_bh,&reg_bh,&reg_bh,&reg_bh,&reg_bh,&reg_bh,
00041 
00042         &reg_al,&reg_al,&reg_al,&reg_al,&reg_al,&reg_al,&reg_al,&reg_al,
00043         &reg_cl,&reg_cl,&reg_cl,&reg_cl,&reg_cl,&reg_cl,&reg_cl,&reg_cl,
00044         &reg_dl,&reg_dl,&reg_dl,&reg_dl,&reg_dl,&reg_dl,&reg_dl,&reg_dl,
00045         &reg_bl,&reg_bl,&reg_bl,&reg_bl,&reg_bl,&reg_bl,&reg_bl,&reg_bl,
00046         &reg_ah,&reg_ah,&reg_ah,&reg_ah,&reg_ah,&reg_ah,&reg_ah,&reg_ah,
00047         &reg_ch,&reg_ch,&reg_ch,&reg_ch,&reg_ch,&reg_ch,&reg_ch,&reg_ch,
00048         &reg_dh,&reg_dh,&reg_dh,&reg_dh,&reg_dh,&reg_dh,&reg_dh,&reg_dh,
00049         &reg_bh,&reg_bh,&reg_bh,&reg_bh,&reg_bh,&reg_bh,&reg_bh,&reg_bh,
00050 
00051         &reg_al,&reg_al,&reg_al,&reg_al,&reg_al,&reg_al,&reg_al,&reg_al,
00052         &reg_cl,&reg_cl,&reg_cl,&reg_cl,&reg_cl,&reg_cl,&reg_cl,&reg_cl,
00053         &reg_dl,&reg_dl,&reg_dl,&reg_dl,&reg_dl,&reg_dl,&reg_dl,&reg_dl,
00054         &reg_bl,&reg_bl,&reg_bl,&reg_bl,&reg_bl,&reg_bl,&reg_bl,&reg_bl,
00055         &reg_ah,&reg_ah,&reg_ah,&reg_ah,&reg_ah,&reg_ah,&reg_ah,&reg_ah,
00056         &reg_ch,&reg_ch,&reg_ch,&reg_ch,&reg_ch,&reg_ch,&reg_ch,&reg_ch,
00057         &reg_dh,&reg_dh,&reg_dh,&reg_dh,&reg_dh,&reg_dh,&reg_dh,&reg_dh,
00058         &reg_bh,&reg_bh,&reg_bh,&reg_bh,&reg_bh,&reg_bh,&reg_bh,&reg_bh
00059 };
00060 
00061 Bit16u * lookupRMregw[]={
00062         &reg_ax,&reg_ax,&reg_ax,&reg_ax,&reg_ax,&reg_ax,&reg_ax,&reg_ax,
00063         &reg_cx,&reg_cx,&reg_cx,&reg_cx,&reg_cx,&reg_cx,&reg_cx,&reg_cx,
00064         &reg_dx,&reg_dx,&reg_dx,&reg_dx,&reg_dx,&reg_dx,&reg_dx,&reg_dx,
00065         &reg_bx,&reg_bx,&reg_bx,&reg_bx,&reg_bx,&reg_bx,&reg_bx,&reg_bx,
00066         &reg_sp,&reg_sp,&reg_sp,&reg_sp,&reg_sp,&reg_sp,&reg_sp,&reg_sp,
00067         &reg_bp,&reg_bp,&reg_bp,&reg_bp,&reg_bp,&reg_bp,&reg_bp,&reg_bp,
00068         &reg_si,&reg_si,&reg_si,&reg_si,&reg_si,&reg_si,&reg_si,&reg_si,
00069         &reg_di,&reg_di,&reg_di,&reg_di,&reg_di,&reg_di,&reg_di,&reg_di,
00070 
00071         &reg_ax,&reg_ax,&reg_ax,&reg_ax,&reg_ax,&reg_ax,&reg_ax,&reg_ax,
00072         &reg_cx,&reg_cx,&reg_cx,&reg_cx,&reg_cx,&reg_cx,&reg_cx,&reg_cx,
00073         &reg_dx,&reg_dx,&reg_dx,&reg_dx,&reg_dx,&reg_dx,&reg_dx,&reg_dx,
00074         &reg_bx,&reg_bx,&reg_bx,&reg_bx,&reg_bx,&reg_bx,&reg_bx,&reg_bx,
00075         &reg_sp,&reg_sp,&reg_sp,&reg_sp,&reg_sp,&reg_sp,&reg_sp,&reg_sp,
00076         &reg_bp,&reg_bp,&reg_bp,&reg_bp,&reg_bp,&reg_bp,&reg_bp,&reg_bp,
00077         &reg_si,&reg_si,&reg_si,&reg_si,&reg_si,&reg_si,&reg_si,&reg_si,
00078         &reg_di,&reg_di,&reg_di,&reg_di,&reg_di,&reg_di,&reg_di,&reg_di,
00079 
00080         &reg_ax,&reg_ax,&reg_ax,&reg_ax,&reg_ax,&reg_ax,&reg_ax,&reg_ax,
00081         &reg_cx,&reg_cx,&reg_cx,&reg_cx,&reg_cx,&reg_cx,&reg_cx,&reg_cx,
00082         &reg_dx,&reg_dx,&reg_dx,&reg_dx,&reg_dx,&reg_dx,&reg_dx,&reg_dx,
00083         &reg_bx,&reg_bx,&reg_bx,&reg_bx,&reg_bx,&reg_bx,&reg_bx,&reg_bx,
00084         &reg_sp,&reg_sp,&reg_sp,&reg_sp,&reg_sp,&reg_sp,&reg_sp,&reg_sp,
00085         &reg_bp,&reg_bp,&reg_bp,&reg_bp,&reg_bp,&reg_bp,&reg_bp,&reg_bp,
00086         &reg_si,&reg_si,&reg_si,&reg_si,&reg_si,&reg_si,&reg_si,&reg_si,
00087         &reg_di,&reg_di,&reg_di,&reg_di,&reg_di,&reg_di,&reg_di,&reg_di,
00088 
00089         &reg_ax,&reg_ax,&reg_ax,&reg_ax,&reg_ax,&reg_ax,&reg_ax,&reg_ax,
00090         &reg_cx,&reg_cx,&reg_cx,&reg_cx,&reg_cx,&reg_cx,&reg_cx,&reg_cx,
00091         &reg_dx,&reg_dx,&reg_dx,&reg_dx,&reg_dx,&reg_dx,&reg_dx,&reg_dx,
00092         &reg_bx,&reg_bx,&reg_bx,&reg_bx,&reg_bx,&reg_bx,&reg_bx,&reg_bx,
00093         &reg_sp,&reg_sp,&reg_sp,&reg_sp,&reg_sp,&reg_sp,&reg_sp,&reg_sp,
00094         &reg_bp,&reg_bp,&reg_bp,&reg_bp,&reg_bp,&reg_bp,&reg_bp,&reg_bp,
00095         &reg_si,&reg_si,&reg_si,&reg_si,&reg_si,&reg_si,&reg_si,&reg_si,
00096         &reg_di,&reg_di,&reg_di,&reg_di,&reg_di,&reg_di,&reg_di,&reg_di
00097 };
00098 
00099 Bit32u * lookupRMregd[256]={
00100         &reg_eax,&reg_eax,&reg_eax,&reg_eax,&reg_eax,&reg_eax,&reg_eax,&reg_eax,
00101         &reg_ecx,&reg_ecx,&reg_ecx,&reg_ecx,&reg_ecx,&reg_ecx,&reg_ecx,&reg_ecx,
00102         &reg_edx,&reg_edx,&reg_edx,&reg_edx,&reg_edx,&reg_edx,&reg_edx,&reg_edx,
00103         &reg_ebx,&reg_ebx,&reg_ebx,&reg_ebx,&reg_ebx,&reg_ebx,&reg_ebx,&reg_ebx,
00104         &reg_esp,&reg_esp,&reg_esp,&reg_esp,&reg_esp,&reg_esp,&reg_esp,&reg_esp,
00105         &reg_ebp,&reg_ebp,&reg_ebp,&reg_ebp,&reg_ebp,&reg_ebp,&reg_ebp,&reg_ebp,
00106         &reg_esi,&reg_esi,&reg_esi,&reg_esi,&reg_esi,&reg_esi,&reg_esi,&reg_esi,
00107         &reg_edi,&reg_edi,&reg_edi,&reg_edi,&reg_edi,&reg_edi,&reg_edi,&reg_edi,
00108 
00109         &reg_eax,&reg_eax,&reg_eax,&reg_eax,&reg_eax,&reg_eax,&reg_eax,&reg_eax,
00110         &reg_ecx,&reg_ecx,&reg_ecx,&reg_ecx,&reg_ecx,&reg_ecx,&reg_ecx,&reg_ecx,
00111         &reg_edx,&reg_edx,&reg_edx,&reg_edx,&reg_edx,&reg_edx,&reg_edx,&reg_edx,
00112         &reg_ebx,&reg_ebx,&reg_ebx,&reg_ebx,&reg_ebx,&reg_ebx,&reg_ebx,&reg_ebx,
00113         &reg_esp,&reg_esp,&reg_esp,&reg_esp,&reg_esp,&reg_esp,&reg_esp,&reg_esp,
00114         &reg_ebp,&reg_ebp,&reg_ebp,&reg_ebp,&reg_ebp,&reg_ebp,&reg_ebp,&reg_ebp,
00115         &reg_esi,&reg_esi,&reg_esi,&reg_esi,&reg_esi,&reg_esi,&reg_esi,&reg_esi,
00116         &reg_edi,&reg_edi,&reg_edi,&reg_edi,&reg_edi,&reg_edi,&reg_edi,&reg_edi,
00117 
00118         &reg_eax,&reg_eax,&reg_eax,&reg_eax,&reg_eax,&reg_eax,&reg_eax,&reg_eax,
00119         &reg_ecx,&reg_ecx,&reg_ecx,&reg_ecx,&reg_ecx,&reg_ecx,&reg_ecx,&reg_ecx,
00120         &reg_edx,&reg_edx,&reg_edx,&reg_edx,&reg_edx,&reg_edx,&reg_edx,&reg_edx,
00121         &reg_ebx,&reg_ebx,&reg_ebx,&reg_ebx,&reg_ebx,&reg_ebx,&reg_ebx,&reg_ebx,
00122         &reg_esp,&reg_esp,&reg_esp,&reg_esp,&reg_esp,&reg_esp,&reg_esp,&reg_esp,
00123         &reg_ebp,&reg_ebp,&reg_ebp,&reg_ebp,&reg_ebp,&reg_ebp,&reg_ebp,&reg_ebp,
00124         &reg_esi,&reg_esi,&reg_esi,&reg_esi,&reg_esi,&reg_esi,&reg_esi,&reg_esi,
00125         &reg_edi,&reg_edi,&reg_edi,&reg_edi,&reg_edi,&reg_edi,&reg_edi,&reg_edi,
00126 
00127         &reg_eax,&reg_eax,&reg_eax,&reg_eax,&reg_eax,&reg_eax,&reg_eax,&reg_eax,
00128         &reg_ecx,&reg_ecx,&reg_ecx,&reg_ecx,&reg_ecx,&reg_ecx,&reg_ecx,&reg_ecx,
00129         &reg_edx,&reg_edx,&reg_edx,&reg_edx,&reg_edx,&reg_edx,&reg_edx,&reg_edx,
00130         &reg_ebx,&reg_ebx,&reg_ebx,&reg_ebx,&reg_ebx,&reg_ebx,&reg_ebx,&reg_ebx,
00131         &reg_esp,&reg_esp,&reg_esp,&reg_esp,&reg_esp,&reg_esp,&reg_esp,&reg_esp,
00132         &reg_ebp,&reg_ebp,&reg_ebp,&reg_ebp,&reg_ebp,&reg_ebp,&reg_ebp,&reg_ebp,
00133         &reg_esi,&reg_esi,&reg_esi,&reg_esi,&reg_esi,&reg_esi,&reg_esi,&reg_esi,
00134         &reg_edi,&reg_edi,&reg_edi,&reg_edi,&reg_edi,&reg_edi,&reg_edi,&reg_edi
00135 };
00136 
00137 
00138 Bit8u * lookupRMEAregb[256]={
00139 /* 12 lines of 16*0 should give nice errors when used */
00140         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00141         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00142         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00143         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00144         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00145         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00146         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00147         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00148         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00149         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00150         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00151         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00152         &reg_al,&reg_cl,&reg_dl,&reg_bl,&reg_ah,&reg_ch,&reg_dh,&reg_bh,
00153         &reg_al,&reg_cl,&reg_dl,&reg_bl,&reg_ah,&reg_ch,&reg_dh,&reg_bh,
00154         &reg_al,&reg_cl,&reg_dl,&reg_bl,&reg_ah,&reg_ch,&reg_dh,&reg_bh,
00155         &reg_al,&reg_cl,&reg_dl,&reg_bl,&reg_ah,&reg_ch,&reg_dh,&reg_bh,
00156         &reg_al,&reg_cl,&reg_dl,&reg_bl,&reg_ah,&reg_ch,&reg_dh,&reg_bh,
00157         &reg_al,&reg_cl,&reg_dl,&reg_bl,&reg_ah,&reg_ch,&reg_dh,&reg_bh,
00158         &reg_al,&reg_cl,&reg_dl,&reg_bl,&reg_ah,&reg_ch,&reg_dh,&reg_bh,
00159         &reg_al,&reg_cl,&reg_dl,&reg_bl,&reg_ah,&reg_ch,&reg_dh,&reg_bh
00160 };
00161 
00162 Bit16u * lookupRMEAregw[256]={
00163 /* 12 lines of 16*0 should give nice errors when used */
00164         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00165         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00166         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00167         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00168         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00169         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00170         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00171         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00172         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00173         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00174         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00175         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00176         &reg_ax,&reg_cx,&reg_dx,&reg_bx,&reg_sp,&reg_bp,&reg_si,&reg_di,
00177         &reg_ax,&reg_cx,&reg_dx,&reg_bx,&reg_sp,&reg_bp,&reg_si,&reg_di,
00178         &reg_ax,&reg_cx,&reg_dx,&reg_bx,&reg_sp,&reg_bp,&reg_si,&reg_di,
00179         &reg_ax,&reg_cx,&reg_dx,&reg_bx,&reg_sp,&reg_bp,&reg_si,&reg_di,
00180         &reg_ax,&reg_cx,&reg_dx,&reg_bx,&reg_sp,&reg_bp,&reg_si,&reg_di,
00181         &reg_ax,&reg_cx,&reg_dx,&reg_bx,&reg_sp,&reg_bp,&reg_si,&reg_di,
00182         &reg_ax,&reg_cx,&reg_dx,&reg_bx,&reg_sp,&reg_bp,&reg_si,&reg_di,
00183         &reg_ax,&reg_cx,&reg_dx,&reg_bx,&reg_sp,&reg_bp,&reg_si,&reg_di
00184 };
00185 
00186 Bit32u * lookupRMEAregd[256]={
00187 /* 12 lines of 16*0 should give nice errors when used */
00188         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00189         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00190         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00191         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00192         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00193         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00194         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00195         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00196         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00197         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00198         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00199         0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,      0,
00200         &reg_eax,&reg_ecx,&reg_edx,&reg_ebx,&reg_esp,&reg_ebp,&reg_esi,&reg_edi,
00201         &reg_eax,&reg_ecx,&reg_edx,&reg_ebx,&reg_esp,&reg_ebp,&reg_esi,&reg_edi,
00202         &reg_eax,&reg_ecx,&reg_edx,&reg_ebx,&reg_esp,&reg_ebp,&reg_esi,&reg_edi,
00203         &reg_eax,&reg_ecx,&reg_edx,&reg_ebx,&reg_esp,&reg_ebp,&reg_esi,&reg_edi,
00204         &reg_eax,&reg_ecx,&reg_edx,&reg_ebx,&reg_esp,&reg_ebp,&reg_esi,&reg_edi,
00205         &reg_eax,&reg_ecx,&reg_edx,&reg_ebx,&reg_esp,&reg_ebp,&reg_esi,&reg_edi,
00206         &reg_eax,&reg_ecx,&reg_edx,&reg_ebx,&reg_esp,&reg_ebp,&reg_esi,&reg_edi,
00207         &reg_eax,&reg_ecx,&reg_edx,&reg_ebx,&reg_esp,&reg_ebp,&reg_esi,&reg_edi
00208 };
00209 
00210
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