1/**************************************************************************** 2* 3* Realmode X86 Emulator Library 4* 5* Copyright (C) 1996-1999 SciTech Software, Inc. 6* Copyright (C) David Mosberger-Tang 7* Copyright (C) 1999 Egbert Eich 8* 9* ======================================================================== 10* 11* Permission to use, copy, modify, distribute, and sell this software and 12* its documentation for any purpose is hereby granted without fee, 13* provided that the above copyright notice appear in all copies and that 14* both that copyright notice and this permission notice appear in 15* supporting documentation, and that the name of the authors not be used 16* in advertising or publicity pertaining to distribution of the software 17* without specific, written prior permission. The authors makes no 18* representations about the suitability of this software for any purpose. 19* It is provided "as is" without express or implied warranty. 20* 21* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 22* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 23* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 24* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF 25* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR 26* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 27* PERFORMANCE OF THIS SOFTWARE. 28* 29* ======================================================================== 30* 31* Language: ANSI C 32* Environment: Any 33* Developer: Kendall Bennett 34* 35* Description: Header file for instruction decoding logic. 36* 37****************************************************************************/ 38 39#ifndef __X86EMU_DECODE_H 40#define __X86EMU_DECODE_H 41 42/*---------------------- Macros and type definitions ----------------------*/ 43 44/* Instruction Decoding Stuff */ 45 46#define FETCH_DECODE_MODRM(mod,rh,rl) fetch_decode_modrm(&mod,&rh,&rl) 47#define DECODE_RM_BYTE_REGISTER(r) decode_rm_byte_register(r) 48#define DECODE_RM_WORD_REGISTER(r) decode_rm_word_register(r) 49#define DECODE_RM_LONG_REGISTER(r) decode_rm_long_register(r) 50#define DECODE_CLEAR_SEGOVR() M.x86.mode &= ~SYSMODE_CLRMASK 51 52/*-------------------------- Function Prototypes --------------------------*/ 53 54#ifdef __cplusplus 55extern "C" { /* Use "C" linkage when in C++ mode */ 56#endif 57 58 void x86emu_intr_raise(u8 type); 59 void fetch_decode_modrm(int *mod, int *regh, int *regl); 60 u8 fetch_byte_imm(void); 61 u16 fetch_word_imm(void); 62 u32 fetch_long_imm(void); 63 u8 fetch_data_byte(uint offset); 64 u8 fetch_data_byte_abs(uint segment, uint offset); 65 u16 fetch_data_word(uint offset); 66 u16 fetch_data_word_abs(uint segment, uint offset); 67 u32 fetch_data_long(uint offset); 68 u32 fetch_data_long_abs(uint segment, uint offset); 69 void store_data_byte(uint offset, u8 val); 70 void store_data_byte_abs(uint segment, uint offset, u8 val); 71 void store_data_word(uint offset, u16 val); 72 void store_data_word_abs(uint segment, uint offset, u16 val); 73 void store_data_long(uint offset, u32 val); 74 void store_data_long_abs(uint segment, uint offset, u32 val); 75 u8 *decode_rm_byte_register(int reg); 76 u16 *decode_rm_word_register(int reg); 77 u32 *decode_rm_long_register(int reg); 78 u16 *decode_rm_seg_register(int reg); 79 u32 decode_rm00_address(int rm); 80 u32 decode_rm01_address(int rm); 81 u32 decode_rm10_address(int rm); 82 u32 decode_sib_address(int sib, int mod); 83 84#ifdef __cplusplus 85} /* End of "C" linkage for C++ */ 86#endif 87#endif /* __X86EMU_DECODE_H */ 88