/*  * UAE - The Un*x Amiga Emulator  *  * MC68000 emulation  *  * Copyright 1995 Bernd Schmidt  */#include "readcpu.h"#include "newmem.h"#include "m68k.h"#define SPCFLAG_STOP 2#define SPCFLAG_COPPER 4#define SPCFLAG_INT 8#define SPCFLAG_BRK 16#define SPCFLAG_EXTRA_CYCLES 32#define SPCFLAG_TRACE 64#define SPCFLAG_DOTRACE 128#define SPCFLAG_DOINT 256#define SPCFLAG_BLTNASTY 512#define SPCFLAG_EXEC 1024#define SPCFLAG_MODE_CHANGE 8192extern int areg_byteinc[];extern int imm8_table[];extern int movem_index1[256];extern int movem_index2[256];extern int movem_next[256];typedef unsigned long cpuop_func (UINT32);struct cputbl {    cpuop_func *handler;    int specific;    UINT16 opcode;};extern unsigned long op_illg (UINT32);typedef char flagtype;extern struct regstruct{    UINT32 regs[16];    CPTR  usp,isp,msp;    UINT16 sr;    flagtype t1;    flagtype t0;    flagtype s;    flagtype m;    flagtype x;    flagtype stopped;    int intmask;    UINT32 pc;    UINT32 vbr,sfc,dfc;} regs, lastint_regs;#define m68k_dreg(r,num) ((r).regs[(num)])#define m68k_areg(r,num) (((r).regs + 8)[(num)])#define get_ibyte(o) cpu_readmem24((UINT32)((UINT8 *)(o + 1)))#define get_iword(o) cpu_readmem24_word((UINT32)((UINT16 *)(o)))#define get_ilong(o) cpu_readmem24_dword((UINT32)((UINT32 *)(o)))#define get_ibyte_1(o) cpu_readmem24(regs.pc + (o) + 1)#define get_iword_1(o) cpu_readmem24_word(regs.pc + (o))#define get_ilong_1(o) cpu_readmem24_dword(regs.pc + (o))#define m68k_incpc(o) (regs.pc += (o))/* These are only used by the 68020/68881 code, and therefore don't * need to handle prefetch.  */static DEF_INLINE UINT32 next_ibyte (void){    UINT32 r = cpu_readmem24((UINT32)((UINT8 *)(regs.pc + 1)));    m68k_incpc (2);    return r;}static DEF_INLINE UINT32 next_iword (void){    UINT32 r = cpu_readmem24_word((UINT32)((UINT16 *)(regs.pc)));    m68k_incpc (2);    return r;}static DEF_INLINE UINT32 next_ilong (void){    UINT32 r = cpu_readmem24_dword((UINT32)((UINT16 *)(regs.pc)));;    m68k_incpc (4);    return r;}static DEF_INLINE void m68k_setpc (CPTR newpc){    regs.pc = newpc;}static DEF_INLINE CPTR m68k_getpc (void){    return regs.pc;}#define m68k_setpc_fast m68k_setpc#define m68k_setpc_bcc  m68k_setpc#define m68k_setpc_rte  m68k_setpcstatic DEF_INLINE void m68k_setstopped (int stop){	extern UINT32 cycles;    cycles = (stop) ? 0: cycles;}extern UINT32 get_disp_ea_020 (UINT32 base, UINT32 dp);typedef void (*output_func_ptr)( const char *, ... );extern INT32 ShowEA (int reg, amodes mode, wordsizes size, char *buf, output_func_ptr debug_out);extern void MakeSR (void);extern void MakeFromSR (void);extern void Exception (int, CPTR);extern void dump_counts (void);extern int m68k_move2c (int, UINT32 *);extern int m68k_movec2 (int, UINT32 *);extern void m68k_divl (UINT32, UINT32, UINT16, CPTR);extern void m68k_mull (UINT32, UINT32, UINT16);extern void init_m68k (void);extern void m68k_go (int);extern void m68k_dumpstate (CPTR *, int);extern void m68k_disasm (CPTR, CPTR *, int, output_func_ptr debug_out);extern void m68k_reset (void);extern void mmu_op (UINT32, UINT16);/* Opcode of faulting instruction */extern UINT16 last_op_for_exception_3;/* PC at fault time */extern CPTR last_addr_for_exception_3;/* Address that generated the exception */extern CPTR last_fault_for_exception_3;#define CPU_OP_NAME(a) op ## a/* 68020 */extern struct cputbl op_smalltbl_1[];extern cpuop_func *cpufunctbl[65536];static DEF_INLINE void m68k_do_jsr(unsigned int oldpc, unsigned int dest){   m68k_areg(regs, 7) -= 4;   cpu_writemem24_dword(m68k_areg(regs, 7), oldpc);   m68k_setpc(dest);}static DEF_INLINE void m68k_do_rts(void){    m68k_setpc(cpu_readmem24_dword(m68k_areg(regs, 7)));    m68k_areg(regs, 7) += 4;}static DEF_INLINE void m68k_do_bsr(unsigned int oldpc, UINT32 offset){    m68k_do_jsr(oldpc, m68k_getpc() + offset);}