src/uae_cpu/newcpu.h

 /*
  * UAE - The Un*x Amiga Emulator
  *
  * MC68000 emulation
  *
  * Copyright 1995 Bernd Schmidt
  */

#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 *)&regs.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 *)&regs.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(&regs.prefetch);
    return (do_get_mem_word (((uae_u16 *)&regs.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)
{
    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 (&regs.prefetch, r);
#endif
}

#if 0
static __inline__ void fill_prefetch_2 (void)
{
    uae_u32 r = do_get_mem_long (&regs.prefetch) << 16;
    uae_u32 r2 = do_get_mem_word (((uae_u16 *)regs.pc_p) + 1);
    r |= r2;
    do_put_mem_long (&regs.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)
{
    regs.pc_p = regs.pc_oldp = get_real_address(newpc);
    regs.pc = newpc;
}
#else
extern void m68k_setpc (uaecptr newpc);
#endif

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);
}

#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_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 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);

/* 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");

Revision:	1.2
Committed:	1999-10-31T23:18:44Z (25 years ago) by cebix
Content type:	text/plain
Branch:	MAIN
CVS Tags:	snapshot-13072000, snapshot-22121999, release-0_8-1, snapshot-02111999
Changes since 1.1:	+2 -2 lines
Log Message:	- removed MemoryDispatch() replacement; routine from ROM is now used if possible - rom_patches.cpp: check for double PACK 4 resources; if only one is found, assume that the ROM requires an FPU and issue a warning if FPU emulation is turned off - UAE CPU opcode routines no longer return the cycle count - main_unix.cpp: pressing Ctrl-C dumps the UAE CPU state before entering mon - sys_unix.cpp: under Linux, partition sizes are read with BLKGETSIZE instead of llseek()
#	User	Rev	Content
1	cebix	1.1	/*
2			* UAE - The Un*x Amiga Emulator
3			*
4			* MC68000 emulation
5			*
6			* Copyright 1995 Bernd Schmidt
7			*/
8
9			#define SPCFLAG_STOP 2
10			#define SPCFLAG_DISK 4
11			#define SPCFLAG_INT 8
12			#define SPCFLAG_BRK 16
13			#define SPCFLAG_EXTRA_CYCLES 32
14			#define SPCFLAG_TRACE 64
15			#define SPCFLAG_DOTRACE 128
16			#define SPCFLAG_DOINT 256
17			#define SPCFLAG_BLTNASTY 512
18			#define SPCFLAG_EXEC 1024
19			#define SPCFLAG_MODE_CHANGE 8192
20
21			#ifndef SET_CFLG
22
23			#define SET_CFLG(x) (CFLG = (x))
24			#define SET_NFLG(x) (NFLG = (x))
25			#define SET_VFLG(x) (VFLG = (x))
26			#define SET_ZFLG(x) (ZFLG = (x))
27			#define SET_XFLG(x) (XFLG = (x))
28
29			#define GET_CFLG CFLG
30			#define GET_NFLG NFLG
31			#define GET_VFLG VFLG
32			#define GET_ZFLG ZFLG
33			#define GET_XFLG XFLG
34
35			#define CLEAR_CZNV do { \
36			SET_CFLG (0); \
37			SET_ZFLG (0); \
38			SET_NFLG (0); \
39			SET_VFLG (0); \
40			} while (0)
41
42			#define COPY_CARRY (SET_XFLG (GET_CFLG))
43			#endif
44
45			extern int areg_byteinc[];
46			extern int imm8_table[];
47
48			extern int movem_index1[256];
49			extern int movem_index2[256];
50			extern int movem_next[256];
51
52			extern int fpp_movem_index1[256];
53			extern int fpp_movem_index2[256];
54			extern int fpp_movem_next[256];
55
56			extern int broken_in;
57
58	cebix	1.2	typedef void REGPARAM2 cpuop_func (uae_u32) REGPARAM;
59	cebix	1.1
60			struct cputbl {
61			cpuop_func *handler;
62			int specific;
63			uae_u16 opcode;
64			};
65
66	cebix	1.2	extern void REGPARAM2 op_illg (uae_u32) REGPARAM;
67	cebix	1.1
68			typedef char flagtype;
69
70			extern struct regstruct
71			{
72			uae_u32 regs[16];
73			uaecptr usp,isp,msp;
74			uae_u16 sr;
75			flagtype t1;
76			flagtype t0;
77			flagtype s;
78			flagtype m;
79			flagtype x;
80			flagtype stopped;
81			int intmask;
82
83			uae_u32 pc;
84			uae_u8 *pc_p;
85			uae_u8 *pc_oldp;
86
87			uae_u32 vbr,sfc,dfc;
88
89			double fp[8];
90			uae_u32 fpcr,fpsr,fpiar;
91
92			uae_u32 spcflags;
93			uae_u32 kick_mask;
94
95			/* Fellow sources say this is 4 longwords. That's impossible. It needs
96			* to be at least a longword. The HRM has some cryptic comment about two
97			* instructions being on the same longword boundary.
98			* The way this is implemented now seems like a good compromise.
99			*/
100			uae_u32 prefetch;
101			} regs, lastint_regs;
102
103			#define m68k_dreg(r,num) ((r).regs[(num)])
104			#define m68k_areg(r,num) (((r).regs + 8)[(num)])
105
106			#define get_ibyte(o) do_get_mem_byte((uae_u8 *)(regs.pc_p + (o) + 1))
107			#define get_iword(o) do_get_mem_word((uae_u16 *)(regs.pc_p + (o)))
108			#define get_ilong(o) do_get_mem_long((uae_u32 *)(regs.pc_p + (o)))
109
110			#ifdef HAVE_GET_WORD_UNSWAPPED
111			#define GET_OPCODE (do_get_mem_word_unswapped (regs.pc_p))
112			#else
113			#define GET_OPCODE (get_iword (0))
114			#endif
115
116			static __inline__ uae_u32 get_ibyte_prefetch (uae_s32 o)
117			{
118			if (o > 3 \|\| o < 0)
119			return do_get_mem_byte((uae_u8 *)(regs.pc_p + o + 1));
120
121			return do_get_mem_byte((uae_u8 )(((uae_u8 )&regs.prefetch) + o + 1));
122			}
123			static __inline__ uae_u32 get_iword_prefetch (uae_s32 o)
124			{
125			if (o > 3 \|\| o < 0)
126			return do_get_mem_word((uae_u16 *)(regs.pc_p + o));
127
128			return do_get_mem_word((uae_u16 )(((uae_u8 )&regs.prefetch) + o));
129			}
130			static __inline__ uae_u32 get_ilong_prefetch (uae_s32 o)
131			{
132			if (o > 3 \|\| o < 0)
133			return do_get_mem_long((uae_u32 *)(regs.pc_p + o));
134			if (o == 0)
135			return do_get_mem_long(&regs.prefetch);
136			return (do_get_mem_word (((uae_u16 )&regs.prefetch) + 1) << 16) \| do_get_mem_word ((uae_u16 )(regs.pc_p + 4));
137			}
138
139			#define m68k_incpc(o) (regs.pc_p += (o))
140
141			static __inline__ void fill_prefetch_0 (void)
142			{
143			uae_u32 r;
144			#ifdef UNALIGNED_PROFITABLE
145			r = (uae_u32 )regs.pc_p;
146			regs.prefetch = r;
147			#else
148			r = do_get_mem_long ((uae_u32 *)regs.pc_p);
149			do_put_mem_long (&regs.prefetch, r);
150			#endif
151			}
152
153			#if 0
154			static __inline__ void fill_prefetch_2 (void)
155			{
156			uae_u32 r = do_get_mem_long (&regs.prefetch) << 16;
157			uae_u32 r2 = do_get_mem_word (((uae_u16 *)regs.pc_p) + 1);
158			r \|= r2;
159			do_put_mem_long (&regs.prefetch, r);
160			}
161			#else
162			#define fill_prefetch_2 fill_prefetch_0
163			#endif
164
165			/* These are only used by the 68020/68881 code, and therefore don't
166			* need to handle prefetch. */
167			static __inline__ uae_u32 next_ibyte (void)
168			{
169			uae_u32 r = get_ibyte (0);
170			m68k_incpc (2);
171			return r;
172			}
173
174			static __inline__ uae_u32 next_iword (void)
175			{
176			uae_u32 r = get_iword (0);
177			m68k_incpc (2);
178			return r;
179			}
180
181			static __inline__ uae_u32 next_ilong (void)
182			{
183			uae_u32 r = get_ilong (0);
184			m68k_incpc (4);
185			return r;
186			}
187
188			#if !defined USE_COMPILER
189			static __inline__ void m68k_setpc (uaecptr newpc)
190			{
191			regs.pc_p = regs.pc_oldp = get_real_address(newpc);
192			regs.pc = newpc;
193			}
194			#else
195			extern void m68k_setpc (uaecptr newpc);
196			#endif
197
198			static __inline__ uaecptr m68k_getpc (void)
199			{
200			return regs.pc + ((char )regs.pc_p - (char )regs.pc_oldp);
201			}
202
203			static __inline__ uaecptr m68k_getpc_p (uae_u8 *p)
204			{
205			return regs.pc + ((char )p - (char )regs.pc_oldp);
206			}
207
208			#ifdef USE_COMPILER
209			extern void m68k_setpc_fast (uaecptr newpc);
210			extern void m68k_setpc_bcc (uaecptr newpc);
211			extern void m68k_setpc_rte (uaecptr newpc);
212			#else
213			#define m68k_setpc_fast m68k_setpc
214			#define m68k_setpc_bcc m68k_setpc
215			#define m68k_setpc_rte m68k_setpc
216			#endif
217
218			static __inline__ void m68k_setstopped (int stop)
219			{
220			regs.stopped = stop;
221			if (stop)
222			regs.spcflags \|= SPCFLAG_STOP;
223			}
224
225			extern uae_u32 get_disp_ea_020 (uae_u32 base, uae_u32 dp);
226			extern uae_u32 get_disp_ea_000 (uae_u32 base, uae_u32 dp);
227
228			extern uae_s32 ShowEA (int reg, amodes mode, wordsizes size, char *buf);
229
230			extern void MakeSR (void);
231			extern void MakeFromSR (void);
232			extern void Exception (int, uaecptr);
233			extern void dump_counts (void);
234			extern void m68k_move2c (int, uae_u32 *);
235			extern void m68k_movec2 (int, uae_u32 *);
236			extern void m68k_divl (uae_u32, uae_u32, uae_u16, uaecptr);
237			extern void m68k_mull (uae_u32, uae_u32, uae_u16);
238			extern void init_m68k (void);
239			extern void m68k_go (int);
240			extern void m68k_dumpstate (uaecptr *);
241			extern void m68k_disasm (uaecptr, uaecptr *, int);
242			extern void m68k_reset (void);
243			extern void m68k_enter_debugger(void);
244
245			extern void mmu_op (uae_u32, uae_u16);
246
247			extern void fpp_opp (uae_u32, uae_u16);
248			extern void fdbcc_opp (uae_u32, uae_u16);
249			extern void fscc_opp (uae_u32, uae_u16);
250			extern void ftrapcc_opp (uae_u32,uaecptr);
251			extern void fbcc_opp (uae_u32, uaecptr, uae_u32);
252			extern void fsave_opp (uae_u32);
253			extern void frestore_opp (uae_u32);
254
255			/* Opcode of faulting instruction */
256			extern uae_u16 last_op_for_exception_3;
257			/* PC at fault time */
258			extern uaecptr last_addr_for_exception_3;
259			/* Address that generated the exception */
260			extern uaecptr last_fault_for_exception_3;
261
262			#define CPU_OP_NAME(a) op ## a
263
264			/* 68020 + 68881 */
265			extern struct cputbl op_smalltbl_0[];
266			/* 68020 */
267			extern struct cputbl op_smalltbl_1[];
268			/* 68010 */
269			extern struct cputbl op_smalltbl_2[];
270			/* 68000 */
271			extern struct cputbl op_smalltbl_3[];
272			/* 68000 slow but compatible. */
273			extern struct cputbl op_smalltbl_4[];
274
275			extern cpuop_func *cpufunctbl[65536] ASM_SYM_FOR_FUNC ("cpufunctbl");
276