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/* $NetBSD: x86emu_regs.h,v 1.1 2007/12/01 20:14:10 joerg Exp $ */
/* $OpenBSD: x86emu_regs.h,v 1.2 2009/06/06 03:45:05 matthieu Exp $ */
/****************************************************************************
*
* Realmode X86 Emulator Library
*
* Copyright (C) 1996-1999 SciTech Software, Inc.
* Copyright (C) David Mosberger-Tang
* Copyright (C) 1999 Egbert Eich
* Copyright (C) 2007 Joerg Sonnenberger
*
* ========================================================================
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation, and that the name of the authors not be used
* in advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. The authors makes no
* representations about the suitability of this software for any purpose.
* It is provided "as is" without express or implied warranty.
*
* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*
****************************************************************************/
#ifndef __X86EMU_REGS_H
#define __X86EMU_REGS_H
/*---------------------- Macros and type definitions ----------------------*/
/* 8 bit registers */
#define R_AH register_a.I8_reg.h_reg
#define R_AL register_a.I8_reg.l_reg
#define R_BH register_b.I8_reg.h_reg
#define R_BL register_b.I8_reg.l_reg
#define R_CH register_c.I8_reg.h_reg
#define R_CL register_c.I8_reg.l_reg
#define R_DH register_d.I8_reg.h_reg
#define R_DL register_d.I8_reg.l_reg
/* 16 bit registers */
#define R_AX register_a.I16_reg.x_reg
#define R_BX register_b.I16_reg.x_reg
#define R_CX register_c.I16_reg.x_reg
#define R_DX register_d.I16_reg.x_reg
/* 32 bit extended registers */
#define R_EAX register_a.I32_reg.e_reg
#define R_EBX register_b.I32_reg.e_reg
#define R_ECX register_c.I32_reg.e_reg
#define R_EDX register_d.I32_reg.e_reg
/* special registers */
#define R_SP register_sp.I16_reg.x_reg
#define R_BP register_bp.I16_reg.x_reg
#define R_SI register_si.I16_reg.x_reg
#define R_DI register_di.I16_reg.x_reg
#define R_IP register_ip.I16_reg.x_reg
#define R_FLG register_flags
/* special registers */
#define R_ESP register_sp.I32_reg.e_reg
#define R_EBP register_bp.I32_reg.e_reg
#define R_ESI register_si.I32_reg.e_reg
#define R_EDI register_di.I32_reg.e_reg
#define R_EIP register_ip.I32_reg.e_reg
#define R_EFLG register_flags
/* segment registers */
#define R_CS register_cs
#define R_DS register_ds
#define R_SS register_ss
#define R_ES register_es
#define R_FS register_fs
#define R_GS register_gs
/* flag conditions */
#define FB_CF 0x0001 /* CARRY flag */
#define FB_PF 0x0004 /* PARITY flag */
#define FB_AF 0x0010 /* AUX flag */
#define FB_ZF 0x0040 /* ZERO flag */
#define FB_SF 0x0080 /* SIGN flag */
#define FB_TF 0x0100 /* TRAP flag */
#define FB_IF 0x0200 /* INTERRUPT ENABLE flag */
#define FB_DF 0x0400 /* DIR flag */
#define FB_OF 0x0800 /* OVERFLOW flag */
/* 80286 and above always have bit#1 set */
#define F_ALWAYS_ON (0x0002) /* flag bits always on */
/*
* Define a mask for only those flag bits we will ever pass back
* (via PUSHF)
*/
#define F_MSK (FB_CF|FB_PF|FB_AF|FB_ZF|FB_SF|FB_TF|FB_IF|FB_DF|FB_OF)
/* following bits masked in to a 16bit quantity */
#define F_CF 0x0001 /* CARRY flag */
#define F_PF 0x0004 /* PARITY flag */
#define F_AF 0x0010 /* AUX flag */
#define F_ZF 0x0040 /* ZERO flag */
#define F_SF 0x0080 /* SIGN flag */
#define F_TF 0x0100 /* TRAP flag */
#define F_IF 0x0200 /* INTERRUPT ENABLE flag */
#define F_DF 0x0400 /* DIR flag */
#define F_OF 0x0800 /* OVERFLOW flag */
#define SET_FLAG(flag) (emu->x86.R_FLG |= (flag))
#define CLEAR_FLAG(flag) (emu->x86.R_FLG &= ~(flag))
#define ACCESS_FLAG(flag) (emu->x86.R_FLG & (flag))
#define CLEARALL_FLAG(m) (emu->x86.R_FLG = 0)
#define CONDITIONAL_SET_FLAG(COND,FLAG) \
if (COND) SET_FLAG(FLAG); else CLEAR_FLAG(FLAG)
#define F_PF_CALC 0x010000 /* PARITY flag has been calced */
#define F_ZF_CALC 0x020000 /* ZERO flag has been calced */
#define F_SF_CALC 0x040000 /* SIGN flag has been calced */
#define F_ALL_CALC 0xff0000 /* All have been calced */
/*
* Emulator machine state.
* Segment usage control.
*/
#define SYSMODE_SEG_DS_SS 0x00000001
#define SYSMODE_SEGOVR_CS 0x00000002
#define SYSMODE_SEGOVR_DS 0x00000004
#define SYSMODE_SEGOVR_ES 0x00000008
#define SYSMODE_SEGOVR_FS 0x00000010
#define SYSMODE_SEGOVR_GS 0x00000020
#define SYSMODE_SEGOVR_SS 0x00000040
#define SYSMODE_PREFIX_REPE 0x00000080
#define SYSMODE_PREFIX_REPNE 0x00000100
#define SYSMODE_PREFIX_DATA 0x00000200
#define SYSMODE_PREFIX_ADDR 0x00000400
#define SYSMODE_INTR_PENDING 0x10000000
#define SYSMODE_EXTRN_INTR 0x20000000
#define SYSMODE_HALTED 0x40000000
#define SYSMODE_SEGMASK (SYSMODE_SEG_DS_SS | \
SYSMODE_SEGOVR_CS | \
SYSMODE_SEGOVR_DS | \
SYSMODE_SEGOVR_ES | \
SYSMODE_SEGOVR_FS | \
SYSMODE_SEGOVR_GS | \
SYSMODE_SEGOVR_SS)
#define SYSMODE_CLRMASK (SYSMODE_SEG_DS_SS | \
SYSMODE_SEGOVR_CS | \
SYSMODE_SEGOVR_DS | \
SYSMODE_SEGOVR_ES | \
SYSMODE_SEGOVR_FS | \
SYSMODE_SEGOVR_GS | \
SYSMODE_SEGOVR_SS | \
SYSMODE_PREFIX_DATA | \
SYSMODE_PREFIX_ADDR)
#define INTR_SYNCH 0x1
#endif /* __X86EMU_REGS_H */
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