DOSBox-X
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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 00020 #define LoadMbs(off) (Bit8s)(LoadMb(off)) 00021 #define LoadMws(off) (Bit16s)(LoadMw(off)) 00022 #define LoadMds(off) (Bit32s)(LoadMd(off)) 00023 00024 #define LoadRb(reg) reg 00025 #define LoadRw(reg) reg 00026 #define LoadRd(reg) reg 00027 00028 #define SaveRb(reg,val) reg=((Bit8u)(val)) 00029 #define SaveRw(reg,val) reg=((Bit16u)(val)) 00030 #define SaveRd(reg,val) reg=((Bit32u)(val)) 00031 00032 static INLINE Bit8s Fetchbs() { 00033 return (Bit8s)Fetchb(); 00034 } 00035 static INLINE Bit16s Fetchws() { 00036 return (Bit16s)Fetchw(); 00037 } 00038 00039 static INLINE Bit32s Fetchds() { 00040 return (Bit32s)Fetchd(); 00041 } 00042 00043 00044 #define RUNEXCEPTION() { \ 00045 CPU_Exception(cpu.exception.which,cpu.exception.error); \ 00046 continue; \ 00047 } 00048 00049 #define EXCEPTION(blah) \ 00050 { \ 00051 CPU_Exception(blah); \ 00052 continue; \ 00053 } 00054 00055 /* NTS: At first glance, this looks like code that will only fetch the delta for conditional jumps 00056 * if the condition is true. Further examination shows that DOSBox's core has two different 00057 * CS:IP variables, reg_ip and core.cseip which Fetchb() modifies. */ 00058 //TODO Could probably make all byte operands fast? 00059 #define JumpCond16_b(COND) { \ 00060 const Bit32u adj=(Bit32u)Fetchbs(); \ 00061 SAVEIP; \ 00062 if (COND) reg_ip+=adj; \ 00063 continue; \ 00064 } 00065 00066 #define JumpCond16_w(COND) { \ 00067 const Bit32u adj=(Bit32u)Fetchws(); \ 00068 SAVEIP; \ 00069 if (COND) reg_ip+=adj; \ 00070 continue; \ 00071 } 00072 00073 #define JumpCond32_b(COND) { \ 00074 const Bit32u adj=(Bit32u)Fetchbs(); \ 00075 SAVEIP; \ 00076 if (COND) reg_eip+=adj; \ 00077 continue; \ 00078 } 00079 00080 #define JumpCond32_d(COND) { \ 00081 const Bit32u adj=(Bit32u)Fetchds(); \ 00082 SAVEIP; \ 00083 if (COND) reg_eip+=adj; \ 00084 continue; \ 00085 } 00086 00087 #define MoveCond16(COND) { \ 00088 GetRMrw; \ 00089 if (rm >= 0xc0 ) {GetEArw; if (COND) *rmrw=*earw;}\ 00090 else {GetEAa; if (COND) *rmrw=LoadMw(eaa);} \ 00091 } 00092 00093 #define MoveCond32(COND) { \ 00094 GetRMrd; \ 00095 if (rm >= 0xc0 ) {GetEArd; if (COND) *rmrd=*eard;}\ 00096 else {GetEAa; if (COND) *rmrd=LoadMd(eaa);} \ 00097 } 00098 00099 #define SETcc(cc) \ 00100 { \ 00101 GetRM; \ 00102 if (rm >= 0xc0 ) {GetEArb;*earb=(cc) ? 1 : 0;} \ 00103 else {GetEAa;SaveMb(eaa,(cc) ? 1 : 0);} \ 00104 } 00105 00106 #include "helpers.h" 00107 #if CPU_CORE <= CPU_ARCHTYPE_8086 00108 # include "table_ea_8086.h" 00109 #else 00110 # include "table_ea.h" 00111 #endif 00112 #include "../modrm.h" 00113 00114