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