src/uae_cpu/newcpu.h

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

#ifndef NEWCPU_H
#define NEWCPU_H

#ifndef FLIGHT_RECORDER
#define FLIGHT_RECORDER 0
#endif

#include "m68k.h"
#include "readcpu.h"
#include "spcflags.h"
 
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 broken_in;

#ifdef X86_ASSEMBLY
/* This hack seems to force all register saves (pushl %reg) to be moved to the
   begining of the function, thus making it possible to cpuopti to remove them
   since m68k_run_1 will save those registers before calling the instruction
   handler */
# define cpuop_tag(tag)         __asm__ __volatile__ ( "#cpuop_" tag )
#else
# define cpuop_tag(tag)         ;
#endif

#define cpuop_begin()           do { cpuop_tag("begin"); } while (0)
#define cpuop_end()                     do { cpuop_tag("end"); } while (0)

typedef void REGPARAM2 cpuop_func (uae_u32) REGPARAM;
 
struct cputbl {
    cpuop_func *handler;
    uae_u16 specific;
    uae_u16 opcode;
};

extern cpuop_func *cpufunctbl[65536] ASM_SYM_FOR_FUNC ("cpufunctbl");

#if USE_JIT
typedef void compop_func (uae_u32) REGPARAM;

struct comptbl {
    compop_func *handler;
        uae_u32         specific;
        uae_u32         opcode;
};
#endif

extern void REGPARAM2 op_illg (uae_u32) REGPARAM;

typedef char flagtype;

struct regstruct {
    uae_u32             regs[16];

    uae_u32             pc;
    uae_u8 *    pc_p;
    uae_u8 *    pc_oldp;

        spcflags_t      spcflags;
    int                 intmask;

    uae_u32             vbr, sfc, dfc;
    uaecptr             usp, isp, msp;
    uae_u16             sr;
    flagtype    t1;
    flagtype    t0;
    flagtype    s;
    flagtype    m;
    flagtype    x;
    flagtype    stopped;

#if USE_PREFETCH_BUFFER
    /* 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;
#endif
};

extern regstruct 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

#if USE_PREFETCH_BUFFER
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));
}
#endif

#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 (&regs.prefetch, r);
#endif
#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;
}

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
}

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
}

#define m68k_setpc_fast m68k_setpc
#define m68k_setpc_bcc  m68k_setpc
#define m68k_setpc_rte  m68k_setpc

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;
    /* A traced STOP instruction drops through immediately without
       actually stopping.  */
    if (stop && (regs.spcflags & SPCFLAG_DOTRACE) == 0)
    SPCFLAGS_SET( 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 int m68k_move2c (int, uae_u32 *);
extern int 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 m68k_emulop (uae_u32);
extern void m68k_emulop_return (void);
extern void init_m68k (void);
extern void exit_m68k (void);
extern void m68k_dumpstate (uaecptr *);
extern void m68k_disasm (uaecptr, uaecptr *, int);
extern void m68k_reset (void);
extern void m68k_enter_debugger(void);
extern int m68k_do_specialties(void);

extern void mmu_op (uae_u32, uae_u16);

/* 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_ff[];
/* 68020 */
extern struct cputbl op_smalltbl_1_ff[];
/* 68010 */
extern struct cputbl op_smalltbl_2_ff[];
/* 68000 */
extern struct cputbl op_smalltbl_3_ff[];
/* 68000 slow but compatible.  */
extern struct cputbl op_smalltbl_4_ff[];

#if FLIGHT_RECORDER
extern void m68k_record_step(uaecptr);
#endif
extern void m68k_do_execute(void);
extern void m68k_execute(void);
#if USE_JIT
#if defined(X86_ASSEMBLY) || defined(X86_64_ASSEMBLY)
/* This is generated code */
extern void (*m68k_compile_execute)(void);
#else
extern void m68k_do_compile_execute(void);
extern void m68k_compile_execute(void);
#endif
#endif
 
#endif /* NEWCPU_H */
Revision:	1.13
Committed:	2004-11-01T16:01:51Z (20 years ago) by gbeauche
Content type:	text/plain
Branch:	MAIN
Changes since 1.12:	+1 -1 lines
Log Message:	revive and fix almost two-year old port to x86_64
#	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	gbeauche	1.4	#ifndef NEWCPU_H
10			#define NEWCPU_H
11
12	gbeauche	1.10	#ifndef FLIGHT_RECORDER
13			#define FLIGHT_RECORDER 0
14			#endif
15
16	gbeauche	1.8	#include "m68k.h"
17			#include "readcpu.h"
18			#include "spcflags.h"
19
20	cebix	1.1	extern int areg_byteinc[];
21			extern int imm8_table[];
22
23			extern int movem_index1[256];
24			extern int movem_index2[256];
25			extern int movem_next[256];
26
27			extern int broken_in;
28
29	gbeauche	1.8	#ifdef X86_ASSEMBLY
30			/* This hack seems to force all register saves (pushl %reg) to be moved to the
31			begining of the function, thus making it possible to cpuopti to remove them
32			since m68k_run_1 will save those registers before calling the instruction
33			handler */
34			# define cpuop_tag(tag) __asm__ __volatile__ ( "#cpuop_" tag )
35			#else
36			# define cpuop_tag(tag) ;
37			#endif
38
39			#define cpuop_begin() do { cpuop_tag("begin"); } while (0)
40	gbeauche	1.12	#define cpuop_end() do { cpuop_tag("end"); } while (0)
41	cebix	1.1
42	gbeauche	1.12	typedef void REGPARAM2 cpuop_func (uae_u32) REGPARAM;
43	gbeauche	1.8
44	cebix	1.1	struct cputbl {
45			cpuop_func *handler;
46	gbeauche	1.8	uae_u16 specific;
47	cebix	1.1	uae_u16 opcode;
48			};
49
50	gbeauche	1.10	extern cpuop_func *cpufunctbl[65536] ASM_SYM_FOR_FUNC ("cpufunctbl");
51
52			#if USE_JIT
53			typedef void compop_func (uae_u32) REGPARAM;
54
55			struct comptbl {
56			compop_func *handler;
57			uae_u32 specific;
58			uae_u32 opcode;
59			};
60			#endif
61
62	gbeauche	1.12	extern void REGPARAM2 op_illg (uae_u32) REGPARAM;
63	cebix	1.1
64			typedef char flagtype;
65
66	gbeauche	1.8	struct regstruct {
67			uae_u32 regs[16];
68	cebix	1.1
69	gbeauche	1.8	uae_u32 pc;
70			uae_u8 * pc_p;
71			uae_u8 * pc_oldp;
72
73			spcflags_t spcflags;
74			int intmask;
75
76			uae_u32 vbr, sfc, dfc;
77			uaecptr usp, isp, msp;
78			uae_u16 sr;
79			flagtype t1;
80			flagtype t0;
81			flagtype s;
82			flagtype m;
83			flagtype x;
84			flagtype stopped;
85	cebix	1.1
86	gbeauche	1.8	#if USE_PREFETCH_BUFFER
87	cebix	1.1	/* Fellow sources say this is 4 longwords. That's impossible. It needs
88			* to be at least a longword. The HRM has some cryptic comment about two
89			* instructions being on the same longword boundary.
90			* The way this is implemented now seems like a good compromise.
91			*/
92			uae_u32 prefetch;
93	gbeauche	1.8	#endif
94			};
95
96			extern regstruct regs, lastint_regs;
97	cebix	1.1
98			#define m68k_dreg(r,num) ((r).regs[(num)])
99			#define m68k_areg(r,num) (((r).regs + 8)[(num)])
100
101			#define get_ibyte(o) do_get_mem_byte((uae_u8 *)(regs.pc_p + (o) + 1))
102			#define get_iword(o) do_get_mem_word((uae_u16 *)(regs.pc_p + (o)))
103			#define get_ilong(o) do_get_mem_long((uae_u32 *)(regs.pc_p + (o)))
104
105			#ifdef HAVE_GET_WORD_UNSWAPPED
106			#define GET_OPCODE (do_get_mem_word_unswapped (regs.pc_p))
107			#else
108			#define GET_OPCODE (get_iword (0))
109			#endif
110
111	gbeauche	1.8	#if USE_PREFETCH_BUFFER
112	cebix	1.1	static __inline__ uae_u32 get_ibyte_prefetch (uae_s32 o)
113			{
114			if (o > 3 \|\| o < 0)
115			return do_get_mem_byte((uae_u8 *)(regs.pc_p + o + 1));
116
117			return do_get_mem_byte((uae_u8 )(((uae_u8 )&regs.prefetch) + o + 1));
118			}
119			static __inline__ uae_u32 get_iword_prefetch (uae_s32 o)
120			{
121			if (o > 3 \|\| o < 0)
122			return do_get_mem_word((uae_u16 *)(regs.pc_p + o));
123
124			return do_get_mem_word((uae_u16 )(((uae_u8 )&regs.prefetch) + o));
125			}
126			static __inline__ uae_u32 get_ilong_prefetch (uae_s32 o)
127			{
128			if (o > 3 \|\| o < 0)
129			return do_get_mem_long((uae_u32 *)(regs.pc_p + o));
130			if (o == 0)
131			return do_get_mem_long(&regs.prefetch);
132			return (do_get_mem_word (((uae_u16 )&regs.prefetch) + 1) << 16) \| do_get_mem_word ((uae_u16 )(regs.pc_p + 4));
133			}
134	gbeauche	1.8	#endif
135	cebix	1.1
136			#define m68k_incpc(o) (regs.pc_p += (o))
137
138			static __inline__ void fill_prefetch_0 (void)
139			{
140	gbeauche	1.4	#if USE_PREFETCH_BUFFER
141	cebix	1.1	uae_u32 r;
142			#ifdef UNALIGNED_PROFITABLE
143			r = (uae_u32 )regs.pc_p;
144			regs.prefetch = r;
145			#else
146			r = do_get_mem_long ((uae_u32 *)regs.pc_p);
147			do_put_mem_long (&regs.prefetch, r);
148			#endif
149	gbeauche	1.4	#endif
150	cebix	1.1	}
151
152			#if 0
153			static __inline__ void fill_prefetch_2 (void)
154			{
155			uae_u32 r = do_get_mem_long (&regs.prefetch) << 16;
156			uae_u32 r2 = do_get_mem_word (((uae_u16 *)regs.pc_p) + 1);
157			r \|= r2;
158			do_put_mem_long (&regs.prefetch, r);
159			}
160			#else
161			#define fill_prefetch_2 fill_prefetch_0
162			#endif
163
164			/* These are only used by the 68020/68881 code, and therefore don't
165			* need to handle prefetch. */
166			static __inline__ uae_u32 next_ibyte (void)
167			{
168			uae_u32 r = get_ibyte (0);
169			m68k_incpc (2);
170			return r;
171			}
172
173			static __inline__ uae_u32 next_iword (void)
174			{
175			uae_u32 r = get_iword (0);
176			m68k_incpc (2);
177			return r;
178			}
179
180			static __inline__ uae_u32 next_ilong (void)
181			{
182			uae_u32 r = get_ilong (0);
183			m68k_incpc (4);
184			return r;
185			}
186
187			static __inline__ void m68k_setpc (uaecptr newpc)
188			{
189	gbeauche	1.4	#if REAL_ADDRESSING \|\| DIRECT_ADDRESSING
190			regs.pc_p = get_real_address(newpc);
191			#else
192	cebix	1.1	regs.pc_p = regs.pc_oldp = get_real_address(newpc);
193			regs.pc = newpc;
194	gbeauche	1.4	#endif
195	cebix	1.1	}
196
197			static __inline__ uaecptr m68k_getpc (void)
198			{
199	gbeauche	1.4	#if REAL_ADDRESSING \|\| DIRECT_ADDRESSING
200			return get_virtual_address(regs.pc_p);
201			#else
202	cebix	1.1	return regs.pc + ((char )regs.pc_p - (char )regs.pc_oldp);
203	gbeauche	1.4	#endif
204	cebix	1.1	}
205
206			#define m68k_setpc_fast m68k_setpc
207			#define m68k_setpc_bcc m68k_setpc
208			#define m68k_setpc_rte m68k_setpc
209
210	gbeauche	1.5	static __inline__ void m68k_do_rts(void)
211			{
212			m68k_setpc(get_long(m68k_areg(regs, 7)));
213			m68k_areg(regs, 7) += 4;
214			}
215
216			static __inline__ void m68k_do_bsr(uaecptr oldpc, uae_s32 offset)
217			{
218			m68k_areg(regs, 7) -= 4;
219			put_long(m68k_areg(regs, 7), oldpc);
220			m68k_incpc(offset);
221			}
222
223			static __inline__ void m68k_do_jsr(uaecptr oldpc, uaecptr dest)
224			{
225			m68k_areg(regs, 7) -= 4;
226			put_long(m68k_areg(regs, 7), oldpc);
227			m68k_setpc(dest);
228			}
229
230	cebix	1.1	static __inline__ void m68k_setstopped (int stop)
231			{
232			regs.stopped = stop;
233	gbeauche	1.7	/* A traced STOP instruction drops through immediately without
234			actually stopping. */
235			if (stop && (regs.spcflags & SPCFLAG_DOTRACE) == 0)
236	gbeauche	1.8	SPCFLAGS_SET( SPCFLAG_STOP );
237	cebix	1.1	}
238
239			extern uae_u32 get_disp_ea_020 (uae_u32 base, uae_u32 dp);
240			extern uae_u32 get_disp_ea_000 (uae_u32 base, uae_u32 dp);
241
242			extern uae_s32 ShowEA (int reg, amodes mode, wordsizes size, char *buf);
243
244			extern void MakeSR (void);
245			extern void MakeFromSR (void);
246			extern void Exception (int, uaecptr);
247			extern void dump_counts (void);
248	gbeauche	1.6	extern int m68k_move2c (int, uae_u32 *);
249			extern int m68k_movec2 (int, uae_u32 *);
250	cebix	1.1	extern void m68k_divl (uae_u32, uae_u32, uae_u16, uaecptr);
251			extern void m68k_mull (uae_u32, uae_u32, uae_u16);
252	gbeauche	1.8	extern void m68k_emulop (uae_u32);
253			extern void m68k_emulop_return (void);
254	cebix	1.1	extern void init_m68k (void);
255	gbeauche	1.3	extern void exit_m68k (void);
256	cebix	1.1	extern void m68k_dumpstate (uaecptr *);
257			extern void m68k_disasm (uaecptr, uaecptr *, int);
258			extern void m68k_reset (void);
259			extern void m68k_enter_debugger(void);
260	gbeauche	1.8	extern int m68k_do_specialties(void);
261	cebix	1.1
262			extern void mmu_op (uae_u32, uae_u16);
263
264			/* Opcode of faulting instruction */
265			extern uae_u16 last_op_for_exception_3;
266			/* PC at fault time */
267			extern uaecptr last_addr_for_exception_3;
268			/* Address that generated the exception */
269			extern uaecptr last_fault_for_exception_3;
270
271			#define CPU_OP_NAME(a) op ## a
272
273			/* 68020 + 68881 */
274	gbeauche	1.8	extern struct cputbl op_smalltbl_0_ff[];
275	cebix	1.1	/* 68020 */
276	gbeauche	1.8	extern struct cputbl op_smalltbl_1_ff[];
277	cebix	1.1	/* 68010 */
278	gbeauche	1.8	extern struct cputbl op_smalltbl_2_ff[];
279	cebix	1.1	/* 68000 */
280	gbeauche	1.8	extern struct cputbl op_smalltbl_3_ff[];
281	cebix	1.1	/* 68000 slow but compatible. */
282	gbeauche	1.8	extern struct cputbl op_smalltbl_4_ff[];
283	cebix	1.1
284	gbeauche	1.10	#if FLIGHT_RECORDER
285			extern void m68k_record_step(uaecptr);
286			#endif
287	gbeauche	1.8	extern void m68k_do_execute(void);
288			extern void m68k_execute(void);
289	gbeauche	1.10	#if USE_JIT
290	gbeauche	1.13	#if defined(X86_ASSEMBLY) \|\| defined(X86_64_ASSEMBLY)
291	gbeauche	1.11	/* This is generated code */
292			extern void (*m68k_compile_execute)(void);
293			#else
294	gbeauche	1.10	extern void m68k_do_compile_execute(void);
295			extern void m68k_compile_execute(void);
296	gbeauche	1.11	#endif
297	gbeauche	1.10	#endif
298	gbeauche	1.8
299	gbeauche	1.4	#endif /* NEWCPU_H */