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- /*
- * UAE - The Un*x Amiga Emulator
- *
- * MC68000 emulation
- *
- * Copyright 1995 Bernd Schmidt
- */
-
- #ifndef NEWCPU_H
- #define NEWCPU_H
-
- #define SPCFLAG_STOP 2
- #define SPCFLAG_DISK 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 8192
-
- #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 void REGPARAM2 cpuop_func (uae_u32) REGPARAM;
-
- struct cputbl {
- cpuop_func *handler;
- int specific;
- uae_u16 opcode;
- };
-
- extern void REGPARAM2 op_illg (uae_u32) REGPARAM;
-
- typedef char flagtype;
-
- extern 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_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;
- } regs, lastint_regs;
-
- #define m68k_dreg(r,num) ((r).regs[(num)])
- #define m68k_areg(r,num) (((r).regs + 8)[(num)])
-
- #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)))
-
- #ifdef HAVE_GET_WORD_UNSWAPPED
- #define GET_OPCODE (do_get_mem_word_unswapped (regs.pc_p))
- #else
- #define GET_OPCODE (get_iword (0))
- #endif
-
- static __inline__ uae_u32 get_ibyte_prefetch (uae_s32 o)
- {
- if (o > 3 || o < 0)
- return do_get_mem_byte((uae_u8 *)(regs.pc_p + o + 1));
-
- return do_get_mem_byte((uae_u8 *)(((uae_u8 *)®s.prefetch) + o + 1));
- }
- static __inline__ uae_u32 get_iword_prefetch (uae_s32 o)
- {
- if (o > 3 || o < 0)
- return do_get_mem_word((uae_u16 *)(regs.pc_p + o));
-
- return do_get_mem_word((uae_u16 *)(((uae_u8 *)®s.prefetch) + o));
- }
- static __inline__ uae_u32 get_ilong_prefetch (uae_s32 o)
- {
- if (o > 3 || o < 0)
- return do_get_mem_long((uae_u32 *)(regs.pc_p + o));
- if (o == 0)
- return do_get_mem_long(®s.prefetch);
- return (do_get_mem_word (((uae_u16 *)®s.prefetch) + 1) << 16) | do_get_mem_word ((uae_u16 *)(regs.pc_p + 4));
- }
-
- #define m68k_incpc(o) (regs.pc_p += (o))
-
- static __inline__ void fill_prefetch_0 (void)
- {
- #if USE_PREFETCH_BUFFER
- uae_u32 r;
- #ifdef UNALIGNED_PROFITABLE
- r = *(uae_u32 *)regs.pc_p;
- regs.prefetch = r;
- #else
- r = do_get_mem_long ((uae_u32 *)regs.pc_p);
- do_put_mem_long (®s.prefetch, r);
- #endif
- #endif
- }
-
- #if 0
- static __inline__ void fill_prefetch_2 (void)
- {
- uae_u32 r = do_get_mem_long (®s.prefetch) << 16;
- uae_u32 r2 = do_get_mem_word (((uae_u16 *)regs.pc_p) + 1);
- r |= r2;
- do_put_mem_long (®s.prefetch, r);
- }
- #else
- #define fill_prefetch_2 fill_prefetch_0
- #endif
-
- /* These are only used by the 68020/68881 code, and therefore don't
- * need to handle prefetch. */
- static __inline__ uae_u32 next_ibyte (void)
- {
- uae_u32 r = get_ibyte (0);
- m68k_incpc (2);
- return r;
- }
-
- static __inline__ uae_u32 next_iword (void)
- {
- uae_u32 r = get_iword (0);
- m68k_incpc (2);
- return r;
- }
-
- static __inline__ uae_u32 next_ilong (void)
- {
- uae_u32 r = get_ilong (0);
- m68k_incpc (4);
- return r;
- }
-
- #if !defined USE_COMPILER
- static __inline__ void m68k_setpc (uaecptr newpc)
- {
- #if REAL_ADDRESSING || DIRECT_ADDRESSING
- regs.pc_p = get_real_address(newpc);
- #else
- regs.pc_p = regs.pc_oldp = get_real_address(newpc);
- regs.pc = newpc;
- #endif
- }
- #else
- extern void m68k_setpc (uaecptr newpc);
- #endif
-
- static __inline__ uaecptr m68k_getpc (void)
- {
- #if REAL_ADDRESSING || DIRECT_ADDRESSING
- return get_virtual_address(regs.pc_p);
- #else
- return regs.pc + ((char *)regs.pc_p - (char *)regs.pc_oldp);
- #endif
- }
-
- #ifdef USE_COMPILER
- extern void m68k_setpc_fast (uaecptr newpc);
- extern void m68k_setpc_bcc (uaecptr newpc);
- extern void m68k_setpc_rte (uaecptr newpc);
- #else
- #define m68k_setpc_fast m68k_setpc
- #define m68k_setpc_bcc m68k_setpc
- #define m68k_setpc_rte m68k_setpc
- #endif
-
- static __inline__ void m68k_do_rts(void)
- {
- m68k_setpc(get_long(m68k_areg(regs, 7)));
- m68k_areg(regs, 7) += 4;
- }
-
- static __inline__ void m68k_do_bsr(uaecptr oldpc, uae_s32 offset)
- {
- m68k_areg(regs, 7) -= 4;
- put_long(m68k_areg(regs, 7), oldpc);
- m68k_incpc(offset);
- }
-
- static __inline__ void m68k_do_jsr(uaecptr oldpc, uaecptr dest)
- {
- m68k_areg(regs, 7) -= 4;
- put_long(m68k_areg(regs, 7), oldpc);
- m68k_setpc(dest);
- }
-
- 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);
- extern void dump_counts (void);
- extern void m68k_move2c (int, uae_u32 *);
- extern void m68k_movec2 (int, uae_u32 *);
- extern void m68k_divl (uae_u32, uae_u32, uae_u16, uaecptr);
- extern void m68k_mull (uae_u32, uae_u32, uae_u16);
- extern void init_m68k (void);
- extern void exit_m68k (void);
- extern void m68k_go (int);
- extern void m68k_dumpstate (uaecptr *);
- extern void m68k_disasm (uaecptr, uaecptr *, int);
- extern void m68k_reset (void);
- extern void m68k_enter_debugger(void);
-
- extern void mmu_op (uae_u32, uae_u16);
-
- extern void fpp_opp (uae_u32, uae_u16);
- extern void fdbcc_opp (uae_u32, uae_u16);
- extern void fscc_opp (uae_u32, uae_u16);
- extern void ftrapcc_opp (uae_u32,uaecptr);
- extern void fbcc_opp (uae_u32, uaecptr, uae_u32);
- extern void fsave_opp (uae_u32);
- extern void frestore_opp (uae_u32);
-
- extern void fpu_set_integral_fpu (bool is_integral);
- extern void fpu_init (void);
- extern void fpu_exit (void);
- extern void fpu_reset (void);
-
- /* 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");
-
- #endif /* NEWCPU_H */
-