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/*
* UAE - The Un*x Amiga Emulator
*
* MC68000 emulation
*
* Copyright 1995 Bernd Schmidt
*/
#ifdef __cplusplus
extern "C" {
#endif
#if HAS_PROFILING
#include "Profiling.h"
#endif
//#include <machdep/m68k.h>
#ifndef SET_CFLG
#define SET_CFLG(x) (CFLG = (x))
#define SET_NFLG(x) (NFLG = (x))
#define SET_VFLG(x) (VFLG = (x))
#define SET_ZFLG(x) (ZFLG = (x))
#define SET_XFLG(x) (XFLG = (x))
#define GET_CFLG CFLG
#define GET_NFLG NFLG
#define GET_VFLG VFLG
#define GET_ZFLG ZFLG
#define GET_XFLG XFLG
#define CLEAR_CZNV do { \
SET_CFLG (0); \
SET_ZFLG (0); \
SET_NFLG (0); \
SET_VFLG (0); \
} while (0)
#define COPY_CARRY (SET_XFLG (GET_CFLG))
#endif
extern int areg_byteinc[];
extern int imm8_table[];
extern int movem_index1[256];
extern int movem_index2[256];
extern int movem_next[256];
extern int fpp_movem_index1[256];
extern int fpp_movem_index2[256];
extern int fpp_movem_next[256];
extern int broken_in;
typedef unsigned long cpuop_func (uae_u32) REGPARAM;
struct cputbl {
cpuop_func *handler;
int specific;
uae_u16 opcode;
struct perfRec perf;
};
extern unsigned long op_illg (uae_u32) REGPARAM;
typedef char flagtype;
typedef struct regstruct
{
uae_u32 regs[16];
uaecptr usp,isp,msp;
uae_u16 sr;
flagtype t1;
flagtype t0;
flagtype s;
flagtype m;
flagtype x;
flagtype stopped;
int intmask;
uae_u32 pc;
uae_u8 *pc_p;
uae_u8 *pc_oldp;
uae_u8 *pc_meta_oldp;
uae_u32 vbr,sfc,dfc;
double fp[8];
uae_u32 fpcr,fpsr,fpiar;
uae_u32 spcflags;
uae_u32 kick_mask;
/* Fellow sources say this is 4 longwords. That's impossible. It needs
* to be at least a longword. The HRM has some cryptic comment about two
* instructions being on the same longword boundary.
* The way this is implemented now seems like a good compromise.
*/
uae_u32 prefetch;
} regstruct;
#ifndef __ECM_DYNAMIC_PATCH
extern regstruct regs;
extern regstruct lastint_regs;
#define gRegs regs
#define gLastint_regs lastint_regs
#else //__ECM_DYNAMIC_PATCH
extern regstruct *gDynRegsP;
#define gRegs (*gDynRegsP)
#endif //__ECM_DYNAMIC_PATCH
#define m68k_dreg(r,num) ((r).regs[(num)])
#define m68k_areg(r,num) (((r).regs + 8)[(num)])
// If we're profiling, go through the real work so we can count
// read cycles. Note that we don't want to actually return the
// value returned by get_foo. That function doesn't always word-
// swap on little-endian machines (e.g., the DummyBank function).
// However, the rest of the emulator is positioned to always
// expect that opcode should be word-swapped on little-endian
// machines (e.g., ATrap::DoCall). Therefore, always fetch opcodes
// with do_get_mem_foo, which will do that swapping.
#if HAS_PROFILING
#define M68K_GETPC() (regs.pc+((char*)regs.pc_p-(char*)regs.pc_oldp))
STATIC_INLINE uae_u8 get_ibyte (uae_s32 o) {
if (gProfilingEnabled) get_byte(M68K_GETPC());
return do_get_mem_byte((uae_u8 *)(regs.pc_p + (o) + 1)); }
STATIC_INLINE uae_u16 get_iword (uae_s32 o) {
if (gProfilingEnabled) get_word(M68K_GETPC());
return do_get_mem_word((uae_u16 *)(regs.pc_p + (o))); }
STATIC_INLINE uae_u32 get_ilong (uae_s32 o) {
if (gProfilingEnabled) get_long(M68K_GETPC());
return do_get_mem_long((uae_u32 *)(regs.pc_p + (o))); }
#else
#define get_ibyte(o) do_get_mem_byte((uae_u8 *)(regs.pc_p + (o) + 1))
#define get_iword(o) do_get_mem_word((uae_u16 *)(regs.pc_p + (o)))
#define get_ilong(o) do_get_mem_long((uae_u32 *)(regs.pc_p + (o)))
#endif
#define m68k_incpc(o) (regs.pc_p += (o))
extern void Software_CheckNewPC (uaecptr newPC);
STATIC_INLINE void m68k_setpc (uaecptr newpc)
{
Software_CheckNewPC (newpc);
{
addrbank* bank = &(get_mem_bank(newpc));
regs.pc_p = regs.pc_oldp = (bank->xlateaddr)(newpc);
regs.pc = newpc;
regs.pc_meta_oldp = (bank->xlatemetaaddr)(newpc);
}
}
STATIC_INLINE uaecptr m68k_getpc (void)
{
return regs.pc + ((char *)regs.pc_p - (char *)regs.pc_oldp);
}
STATIC_INLINE uaecptr m68k_getpc_p (uae_u8 *p)
{
return regs.pc + ((char *)p - (char *)regs.pc_oldp);
}
#define m68k_setpc_fast m68k_setpc
#define m68k_setpc_bcc m68k_setpc
#define m68k_setpc_rte m68k_setpc
STATIC_INLINE void m68k_setstopped (int stop)
{
regs.stopped = stop;
if (stop)
regs.spcflags |= SPCFLAG_STOP;
}
extern uae_u32 get_disp_ea_020 (uae_u32 base, uae_u32 dp);
extern uae_u32 get_disp_ea_000 (uae_u32 base, uae_u32 dp);
extern uae_s32 ShowEA (int reg, amodes mode, wordsizes size, char *buf);
extern void MakeSR (void);
extern void MakeFromSR (void);
extern void Exception (int, uaecptr);
/* Opcode of faulting instruction */
extern uae_u16 last_op_for_exception_3;
/* PC at fault time */
extern uaecptr last_addr_for_exception_3;
/* Address that generated the exception */
extern uaecptr last_fault_for_exception_3;
#define CPU_OP_NAME(a) op ## a
/* 68020 + 68881 */
extern struct cputbl op_smalltbl_0[];
/* 68020 */
extern struct cputbl op_smalltbl_1[];
/* 68010 */
extern struct cputbl op_smalltbl_2[];
/* 68000 */
extern struct cputbl op_smalltbl_3[];
/* 68000 slow but compatible. */
extern struct cputbl op_smalltbl_4[];
extern cpuop_func *cpufunctbl[65536] ASM_SYM_FOR_FUNC ("cpufunctbl");
#ifdef __cplusplus
}
#endif
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