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) REGPARAM;
#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
#ifdef USE_CPU_EMUL_SERVICES
extern int32 emulated_ticks;
extern void cpu_do_check_ticks(void);

static inline void cpu_check_ticks(void)
{
        if (--emulated_ticks <= 0)
                cpu_do_check_ticks();
}
#else
#define cpu_check_ticks()
#define cpu_do_check_ticks()
#endif
 
#endif /* NEWCPU_H */
Revision:	1.15
Committed:	2005-06-11T06:43:24Z (19 years, 5 months ago) by gbeauche
Content type:	text/plain
Branch:	MAIN
CVS Tags:	nigel-build-17
Changes since 1.14:	+13 -0 lines
Log Message:	Much improved responsiveness on NetBSD systems. On those systems, it's really hard to get high resolution timings and the system oftens fails to honour a timeout in less than 20 ms. The idea here is to have an average m68k instruction count (countdown quantum) that triggers real interrupt checks. The quantum is calibrated every 10 ticks and has a 1000 Hz resolution on average.
#	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	gbeauche	1.14	extern void m68k_record_step(uaecptr) REGPARAM;
286	gbeauche	1.10	#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	1.15	#ifdef USE_CPU_EMUL_SERVICES
299			extern int32 emulated_ticks;
300			extern void cpu_do_check_ticks(void);
301
302			static inline void cpu_check_ticks(void)
303			{
304			if (--emulated_ticks <= 0)
305			cpu_do_check_ticks();
306			}
307			#else
308			#define cpu_check_ticks()
309			#define cpu_do_check_ticks()
310			#endif
311	gbeauche	1.8
312	gbeauche	1.4	#endif /* NEWCPU_H */