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