1 /**************************************************************************** 2 * 3 * Realmode X86 Emulator Library 4 * 5 * Copyright (C) 1991-2004 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 55 extern "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 unsigned decode_rm00_address(int rm); 80 unsigned decode_rm01_address(int rm); 81 unsigned decode_rm10_address(int rm); 82 unsigned decode_rmXX_address(int mod, int rm); 83 84 #ifdef __cplusplus 85 } /* End of "C" linkage for C++ */ 86 #endif 87 88 #endif /* __X86EMU_DECODE_H */ 89