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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 | |
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 | 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 */ |