00001 /**************************************************************************** 00002 * 00003 * Realmode X86 Emulator Library 00004 * 00005 * Copyright (C) 1996-1999 SciTech Software, Inc. 00006 * Copyright (C) David Mosberger-Tang 00007 * Copyright (C) 1999 Egbert Eich 00008 * 00009 * ======================================================================== 00010 * 00011 * Permission to use, copy, modify, distribute, and sell this software and 00012 * its documentation for any purpose is hereby granted without fee, 00013 * provided that the above copyright notice appear in all copies and that 00014 * both that copyright notice and this permission notice appear in 00015 * supporting documentation, and that the name of the authors not be used 00016 * in advertising or publicity pertaining to distribution of the software 00017 * without specific, written prior permission. The authors makes no 00018 * representations about the suitability of this software for any purpose. 00019 * It is provided "as is" without express or implied warranty. 00020 * 00021 * THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 00022 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 00023 * EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 00024 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF 00025 * USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR 00026 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 00027 * PERFORMANCE OF THIS SOFTWARE. 00028 * 00029 * ======================================================================== 00030 * 00031 * Language: ANSI C 00032 * Environment: Any 00033 * Developer: Kendall Bennett 00034 * 00035 * Description: Header file for instruction decoding logic. 00036 * 00037 ****************************************************************************/ 00038 00039 #ifndef __X86EMU_DECODE_H 00040 #define __X86EMU_DECODE_H 00041 00042 /*---------------------- Macros and type definitions ----------------------*/ 00043 00044 /* Instruction Decoding Stuff */ 00045 00046 #define FETCH_DECODE_MODRM(mod,rh,rl) fetch_decode_modrm(&mod,&rh,&rl) 00047 #define DECODE_RM_BYTE_REGISTER(r) decode_rm_byte_register(r) 00048 #define DECODE_RM_WORD_REGISTER(r) decode_rm_word_register(r) 00049 #define DECODE_RM_LONG_REGISTER(r) decode_rm_long_register(r) 00050 #define DECODE_CLEAR_SEGOVR() M.x86.mode &= ~SYSMODE_CLRMASK 00051 00052 /*-------------------------- Function Prototypes --------------------------*/ 00053 00054 void x86emu_intr_raise (u8 type); 00055 void fetch_decode_modrm (int *mod,int *regh,int *regl); 00056 u8 fetch_byte_imm (void); 00057 u16 fetch_word_imm (void); 00058 u32 fetch_long_imm (void); 00059 u8 fetch_data_byte (uint offset); 00060 u8 fetch_data_byte_abs (uint segment, uint offset); 00061 u16 fetch_data_word (uint offset); 00062 u16 fetch_data_word_abs (uint segment, uint offset); 00063 u32 fetch_data_long (uint offset); 00064 u32 fetch_data_long_abs (uint segment, uint offset); 00065 void store_data_byte (uint offset, u8 val); 00066 void store_data_byte_abs (uint segment, uint offset, u8 val); 00067 void store_data_word (uint offset, u16 val); 00068 void store_data_word_abs (uint segment, uint offset, u16 val); 00069 void store_data_long (uint offset, u32 val); 00070 void store_data_long_abs (uint segment, uint offset, u32 val); 00071 u8* decode_rm_byte_register(int reg); 00072 u16* decode_rm_word_register(int reg); 00073 u32* decode_rm_long_register(int reg); 00074 u16* decode_rm_seg_register(int reg); 00075 unsigned decode_rm00_address(int rm); 00076 unsigned decode_rm01_address(int rm); 00077 unsigned decode_rm10_address(int rm); 00078 00079 #endif /* __X86EMU_DECODE_H */