a698ee58b9d0ca930ee8c28603577657cea614bc
2 * Simulator for the Hitachi H8/300 architecture.
4 * Written by Steve Chamberlain of Cygnus Support. sac@cygnus.com
6 * This file is part of H8/300 sim
9 * THIS SOFTWARE IS NOT COPYRIGHTED
11 * Cygnus offers the following for use in the public domain. Cygnus makes no
12 * warranty with regard to the software or its performance and the user
13 * accepts the software "AS IS" with all faults.
15 * CYGNUS DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD TO THIS
16 * SOFTWARE INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY
17 * AND FITNESS FOR A PARTICULAR PURPOSE.
30 #ifdef HAVE_SYS_PARAM_H
31 #include <sys/param.h>
36 #include "remote-sim.h"
44 host_callback
*sim_callback
;
46 static SIM_OPEN_KIND sim_kind
;
49 /* FIXME: Needs to live in header file.
50 This header should also include the things in remote-sim.h.
51 One could move this to remote-sim.h but this function isn't needed
53 void sim_set_simcache_size
PARAMS ((int));
55 #define X(op, size) op * 4 + size
57 #define SP (h8300hmode ? SL : SW)
70 #define h8_opcodes ops
72 #include "opcode/h8300.h"
76 /* The rate at which to call the host's poll_quit callback. */
78 #define POLL_QUIT_INTERVAL 0x80000
80 #define LOW_BYTE(x) ((x) & 0xff)
81 #define HIGH_BYTE(x) (((x) >> 8) & 0xff)
82 #define P(X,Y) ((X << 8) | Y)
84 #define BUILDSR() cpu.ccr = (N << 3) | (Z << 2) | (V << 1) | C;
87 c = (cpu.ccr >> 0) & 1;\
88 v = (cpu.ccr >> 1) & 1;\
89 nz = !((cpu.ccr >> 2) & 1);\
90 n = (cpu.ccr >> 3) & 1;
92 #ifdef __CHAR_IS_SIGNED__
93 #define SEXTCHAR(x) ((char) (x))
97 #define SEXTCHAR(x) ((x & 0x80) ? (x | ~0xff): x & 0xff)
100 #define UEXTCHAR(x) ((x) & 0xff)
101 #define UEXTSHORT(x) ((x) & 0xffff)
102 #define SEXTSHORT(x) ((short) (x))
104 static cpu_state_type cpu
;
109 static int memory_size
;
114 return time (0); /* WinXX HAS UNIX like 'time', so why not using it? */
135 return h8300hmode
? SL
: SW
;
147 return X (OP_IMM
, SP
);
149 return X (OP_REG
, SP
);
152 return X (OP_MEM
, SP
);
155 abort (); /* ?? May be something more usefull? */
160 decode (addr
, data
, dst
)
178 /* Find the exact opcode/arg combo. */
179 for (q
= h8_opcodes
; q
->name
; q
++)
181 op_type
*nib
= q
->data
.nib
;
182 unsigned int len
= 0;
186 op_type looking_for
= *nib
;
187 int thisnib
= data
[len
>> 1];
189 thisnib
= (len
& 1) ? (thisnib
& 0xf) : ((thisnib
>> 4) & 0xf);
191 if (looking_for
< 16 && looking_for
>= 0)
193 if (looking_for
!= thisnib
)
198 if ((int) looking_for
& (int) B31
)
200 if (!(((int) thisnib
& 0x8) != 0))
203 looking_for
= (op_type
) ((int) looking_for
& ~(int) B31
);
207 if ((int) looking_for
& (int) B30
)
209 if (!(((int) thisnib
& 0x8) == 0))
212 looking_for
= (op_type
) ((int) looking_for
& ~(int) B30
);
215 if (looking_for
& DBIT
)
217 /* Exclude adds/subs by looking at bit 0 and 2, and
218 make sure the operand size, either w or l,
219 matches by looking at bit 1. */
220 if ((looking_for
& 7) != (thisnib
& 7))
223 abs
= (thisnib
& 0x8) ? 2 : 1;
225 else if (looking_for
& (REG
| IND
| INC
| DEC
))
227 if (looking_for
& REG
)
229 /* Can work out size from the register. */
230 size
= bitfrom (looking_for
);
232 if (looking_for
& SRC
)
237 else if (looking_for
& L_16
)
239 abs
= (data
[len
>> 1]) * 256 + data
[(len
+ 2) >> 1];
241 if (looking_for
& (PCREL
| DISP
))
246 else if (looking_for
& ABSJMP
)
248 abs
= (data
[1] << 16) | (data
[2] << 8) | (data
[3]);
250 else if (looking_for
& MEMIND
)
254 else if (looking_for
& L_32
)
258 abs
= (data
[i
] << 24)
259 | (data
[i
+ 1] << 16)
265 else if (looking_for
& L_24
)
269 abs
= (data
[i
] << 16) | (data
[i
+ 1] << 8) | (data
[i
+ 2]);
272 else if (looking_for
& IGNORE
)
276 else if (looking_for
& DISPREG
)
278 rdisp
= thisnib
& 0x7;
280 else if (looking_for
& KBIT
)
297 else if (looking_for
& L_8
)
301 if (looking_for
& PCREL
)
303 abs
= SEXTCHAR (data
[len
>> 1]);
305 else if (looking_for
& ABS8MEM
)
308 abs
= h8300hmode
? ~0xff0000ff : ~0xffff00ff;
309 abs
|= data
[len
>> 1] & 0xff;
313 abs
= data
[len
>> 1] & 0xff;
316 else if (looking_for
& L_3
)
322 else if (looking_for
== E
)
326 /* Fill in the args. */
328 op_type
*args
= q
->args
.nib
;
334 int rn
= (x
& DST
) ? rd
: rs
;
344 p
->type
= X (OP_IMM
, size
);
347 else if (x
& (IMM
| KBIT
| DBIT
))
349 p
->type
= X (OP_IMM
, size
);
355 Some ops (like mul) have two sizes. */
358 p
->type
= X (OP_REG
, size
);
363 p
->type
= X (OP_INC
, size
);
368 p
->type
= X (OP_DEC
, size
);
373 p
->type
= X (OP_DISP
, size
);
377 else if (x
& (ABS
| ABSJMP
| ABS8MEM
))
379 p
->type
= X (OP_DISP
, size
);
385 p
->type
= X (OP_MEM
, size
);
390 p
->type
= X (OP_PCREL
, size
);
391 p
->literal
= abs
+ addr
+ 2;
397 p
->type
= X (OP_IMM
, SP
);
402 p
->type
= X (OP_DISP
, size
);
404 p
->reg
= rdisp
& 0x7;
411 printf ("Hmmmm %x", x
);
417 /* But a jmp or a jsr gets automagically lvalued,
418 since we branch to their address not their
420 if (q
->how
== O (O_JSR
, SB
)
421 || q
->how
== O (O_JMP
, SB
))
423 dst
->src
.type
= lvalue (dst
->src
.type
, dst
->src
.reg
);
426 if (dst
->dst
.type
== -1)
429 dst
->opcode
= q
->how
;
430 dst
->cycles
= q
->time
;
432 /* And a jsr to 0xc4 is turned into a magic trap. */
434 if (dst
->opcode
== O (O_JSR
, SB
))
436 if (dst
->src
.literal
== 0xc4)
438 dst
->opcode
= O (O_SYSCALL
, SB
);
442 dst
->next_pc
= addr
+ len
/ 2;
446 printf ("Don't understand %x \n", looking_for
);
457 /* Fell off the end. */
458 dst
->opcode
= O (O_ILL
, SB
);
466 /* Find the next cache entry to use. */
467 idx
= cpu
.cache_top
+ 1;
469 if (idx
>= cpu
.csize
)
475 /* Throw away its old meaning. */
476 cpu
.cache_idx
[cpu
.cache
[idx
].oldpc
] = 0;
478 /* Set to new address. */
479 cpu
.cache
[idx
].oldpc
= pc
;
481 /* Fill in instruction info. */
482 decode (pc
, cpu
.memory
+ pc
, cpu
.cache
+ idx
);
484 /* Point to new cache entry. */
485 cpu
.cache_idx
[pc
] = idx
;
489 static unsigned char *breg
[18];
490 static unsigned short *wreg
[18];
491 static unsigned int *lreg
[18];
493 #define GET_B_REG(x) *(breg[x])
494 #define SET_B_REG(x,y) (*(breg[x])) = (y)
495 #define GET_W_REG(x) *(wreg[x])
496 #define SET_W_REG(x,y) (*(wreg[x])) = (y)
498 #define GET_L_REG(x) *(lreg[x])
499 #define SET_L_REG(x,y) (*(lreg[x])) = (y)
501 #define GET_MEMORY_L(x) \
503 ? ((cpu.memory[x+0] << 24) | (cpu.memory[x+1] << 16) \
504 | (cpu.memory[x+2] << 8) | cpu.memory[x+3]) \
505 : ((cpu.eightbit[(x+0) & 0xff] << 24) | (cpu.eightbit[(x+1) & 0xff] << 16) \
506 | (cpu.eightbit[(x+2) & 0xff] << 8) | cpu.eightbit[(x+3) & 0xff]))
508 #define GET_MEMORY_W(x) \
510 ? ((cpu.memory[x+0] << 8) | (cpu.memory[x+1] << 0)) \
511 : ((cpu.eightbit[(x+0) & 0xff] << 8) | (cpu.eightbit[(x+1) & 0xff] << 0)))
514 #define GET_MEMORY_B(x) \
515 (x < memory_size ? (cpu.memory[x]) : (cpu.eightbit[x & 0xff]))
517 #define SET_MEMORY_L(x,y) \
518 { register unsigned char *_p; register int __y = y; \
519 _p = (x < memory_size ? cpu.memory+x : cpu.eightbit + (x & 0xff)); \
520 _p[0] = (__y)>>24; _p[1] = (__y)>>16; \
521 _p[2] = (__y)>>8; _p[3] = (__y)>>0;}
523 #define SET_MEMORY_W(x,y) \
524 { register unsigned char *_p; register int __y = y; \
525 _p = (x < memory_size ? cpu.memory+x : cpu.eightbit + (x & 0xff)); \
526 _p[0] = (__y)>>8; _p[1] =(__y);}
528 #define SET_MEMORY_B(x,y) \
529 (x < memory_size ? (cpu.memory[(x)] = y) : (cpu.eightbit[x & 0xff] = y))
536 int abs
= arg
->literal
;
543 return GET_B_REG (rn
);
545 return GET_W_REG (rn
);
547 return GET_L_REG (rn
);
558 r
= GET_MEMORY_B (t
);
567 r
= GET_MEMORY_W (t
);
575 r
= GET_MEMORY_L (t
);
582 case X (OP_DISP
, SB
):
583 t
= GET_L_REG (rn
) + abs
;
585 return GET_MEMORY_B (t
);
587 case X (OP_DISP
, SW
):
588 t
= GET_L_REG (rn
) + abs
;
590 return GET_MEMORY_W (t
);
592 case X (OP_DISP
, SL
):
593 t
= GET_L_REG (rn
) + abs
;
595 return GET_MEMORY_L (t
);
598 t
= GET_MEMORY_L (abs
);
603 t
= GET_MEMORY_W (abs
);
608 abort (); /* ?? May be something more usefull? */
620 int abs
= arg
->literal
;
636 t
= GET_L_REG (rn
) - 1;
643 t
= (GET_L_REG (rn
) - 2) & cpu
.mask
;
649 t
= (GET_L_REG (rn
) - 4) & cpu
.mask
;
654 case X (OP_DISP
, SB
):
655 t
= GET_L_REG (rn
) + abs
;
660 case X (OP_DISP
, SW
):
661 t
= GET_L_REG (rn
) + abs
;
666 case X (OP_DISP
, SL
):
667 t
= GET_L_REG (rn
) + abs
;
703 memory_size
= H8300H_MSIZE
;
705 memory_size
= H8300_MSIZE
;
706 cpu
.memory
= (unsigned char *) calloc (sizeof (char), memory_size
);
707 cpu
.cache_idx
= (unsigned short *) calloc (sizeof (short), memory_size
);
708 cpu
.eightbit
= (unsigned char *) calloc (sizeof (char), 256);
710 /* `msize' must be a power of two. */
711 if ((memory_size
& (memory_size
- 1)) != 0)
713 cpu
.mask
= memory_size
- 1;
715 for (i
= 0; i
< 9; i
++)
720 for (i
= 0; i
< 8; i
++)
722 unsigned char *p
= (unsigned char *) (cpu
.regs
+ i
);
723 unsigned char *e
= (unsigned char *) (cpu
.regs
+ i
+ 1);
724 unsigned short *q
= (unsigned short *) (cpu
.regs
+ i
);
725 unsigned short *u
= (unsigned short *) (cpu
.regs
+ i
+ 1);
726 cpu
.regs
[i
] = 0x00112233;
752 lreg
[i
] = &cpu
.regs
[i
];
755 lreg
[8] = &cpu
.regs
[8];
757 /* Initialize the seg registers. */
759 sim_set_simcache_size (CSIZE
);
764 control_c (sig
, code
, scp
, addr
)
770 cpu
.state
= SIM_STATE_STOPPED
;
771 cpu
.exception
= SIGINT
;
780 mop (code
, bsize
, sign
)
793 bsize
? SEXTCHAR (GET_W_REG (code
->dst
.reg
)) :
794 SEXTSHORT (GET_W_REG (code
->dst
.reg
));
796 bsize
? SEXTCHAR (GET_B_REG (code
->src
.reg
)) :
797 SEXTSHORT (GET_W_REG (code
->src
.reg
));
801 multiplicand
= bsize
? UEXTCHAR (GET_W_REG (code
->dst
.reg
)) :
802 UEXTSHORT (GET_W_REG (code
->dst
.reg
));
804 bsize
? UEXTCHAR (GET_B_REG (code
->src
.reg
)) :
805 UEXTSHORT (GET_W_REG (code
->src
.reg
));
808 result
= multiplier
* multiplicand
;
812 n
= result
& (bsize
? 0x8000 : 0x80000000);
813 nz
= result
& (bsize
? 0xffff : 0xffffffff);
817 SET_W_REG (code
->dst
.reg
, result
);
821 SET_L_REG (code
->dst
.reg
, result
);
824 return ((n
== 1) << 1) | (nz
== 1);
828 #define ONOT(name, how) \
833 rd = GET_B_REG (code->src.reg); \
841 rd = GET_W_REG (code->src.reg); \
848 int hm = 0x80000000; \
849 rd = GET_L_REG (code->src.reg); \
854 #define OSHIFTS(name, how1, how2) \
859 rd = GET_B_REG (code->src.reg); \
860 if ((GET_MEMORY_B (pc + 1) & 0x40) == 0) \
874 rd = GET_W_REG (code->src.reg); \
875 if ((GET_MEMORY_B (pc + 1) & 0x40) == 0) \
888 int hm = 0x80000000; \
889 rd = GET_L_REG (code->src.reg); \
890 if ((GET_MEMORY_B (pc + 1) & 0x40) == 0) \
901 #define OBITOP(name,f, s, op) \
906 if (f) ea = fetch (&code->dst); \
907 m=1<< fetch(&code->src); \
909 if(s) store (&code->dst,ea); goto next; \
916 cpu
.state
= SIM_STATE_STOPPED
;
917 cpu
.exception
= SIGINT
;
922 sim_resume (sd
, step
, siggnal
)
928 int tick_start
= get_now ();
941 prev
= signal (SIGINT
, control_c
);
945 cpu
.state
= SIM_STATE_STOPPED
;
946 cpu
.exception
= SIGTRAP
;
950 cpu
.state
= SIM_STATE_RUNNING
;
956 /* The PC should never be odd. */
970 cidx
= cpu
.cache_idx
[pc
];
971 code
= cpu
.cache
+ cidx
;
974 #define ALUOP(STORE, NAME, HOW) \
975 case O(NAME,SB): HOW; if(STORE)goto alu8;else goto just_flags_alu8; \
976 case O(NAME, SW): HOW; if(STORE)goto alu16;else goto just_flags_alu16; \
977 case O(NAME,SL): HOW; if(STORE)goto alu32;else goto just_flags_alu32;
980 #define LOGOP(NAME, HOW) \
981 case O(NAME,SB): HOW; goto log8;\
982 case O(NAME, SW): HOW; goto log16;\
983 case O(NAME,SL): HOW; goto log32;
990 printf ("%x %d %s\n", pc
, code
->opcode
,
991 code
->op
? code
->op
->name
: "**");
993 cpu
.stats
[code
->opcode
]++;
999 cycles
+= code
->cycles
;
1003 switch (code
->opcode
)
1007 * This opcode is a fake for when we get to an
1008 * instruction which hasnt been compiled
1015 case O (O_SUBX
, SB
):
1016 rd
= fetch (&code
->dst
);
1017 ea
= fetch (&code
->src
);
1022 case O (O_ADDX
, SB
):
1023 rd
= fetch (&code
->dst
);
1024 ea
= fetch (&code
->src
);
1029 #define EA ea = fetch(&code->src);
1030 #define RD_EA ea = fetch(&code->src); rd = fetch(&code->dst);
1032 ALUOP (1, O_SUB
, RD_EA
;
1035 ALUOP (1, O_NEG
, EA
;
1041 rd
= GET_B_REG (code
->dst
.reg
);
1042 ea
= fetch (&code
->src
);
1046 rd
= GET_W_REG (code
->dst
.reg
);
1047 ea
= fetch (&code
->src
);
1051 rd
= GET_L_REG (code
->dst
.reg
);
1052 ea
= fetch (&code
->src
);
1057 LOGOP (O_AND
, RD_EA
;
1063 LOGOP (O_XOR
, RD_EA
;
1067 case O (O_MOV_TO_MEM
, SB
):
1068 res
= GET_B_REG (code
->src
.reg
);
1070 case O (O_MOV_TO_MEM
, SW
):
1071 res
= GET_W_REG (code
->src
.reg
);
1073 case O (O_MOV_TO_MEM
, SL
):
1074 res
= GET_L_REG (code
->src
.reg
);
1078 case O (O_MOV_TO_REG
, SB
):
1079 res
= fetch (&code
->src
);
1080 SET_B_REG (code
->dst
.reg
, res
);
1081 goto just_flags_log8
;
1082 case O (O_MOV_TO_REG
, SW
):
1083 res
= fetch (&code
->src
);
1084 SET_W_REG (code
->dst
.reg
, res
);
1085 goto just_flags_log16
;
1086 case O (O_MOV_TO_REG
, SL
):
1087 res
= fetch (&code
->src
);
1088 SET_L_REG (code
->dst
.reg
, res
);
1089 goto just_flags_log32
;
1092 case O (O_ADDS
, SL
):
1093 SET_L_REG (code
->dst
.reg
,
1094 GET_L_REG (code
->dst
.reg
)
1095 + code
->src
.literal
);
1099 case O (O_SUBS
, SL
):
1100 SET_L_REG (code
->dst
.reg
,
1101 GET_L_REG (code
->dst
.reg
)
1102 - code
->src
.literal
);
1106 rd
= fetch (&code
->dst
);
1107 ea
= fetch (&code
->src
);
1110 goto just_flags_alu8
;
1113 rd
= fetch (&code
->dst
);
1114 ea
= fetch (&code
->src
);
1117 goto just_flags_alu16
;
1120 rd
= fetch (&code
->dst
);
1121 ea
= fetch (&code
->src
);
1124 goto just_flags_alu32
;
1128 rd
= GET_B_REG (code
->src
.reg
);
1131 SET_B_REG (code
->src
.reg
, res
);
1132 goto just_flags_inc8
;
1135 rd
= GET_W_REG (code
->dst
.reg
);
1136 ea
= -code
->src
.literal
;
1138 SET_W_REG (code
->dst
.reg
, res
);
1139 goto just_flags_inc16
;
1142 rd
= GET_L_REG (code
->dst
.reg
);
1143 ea
= -code
->src
.literal
;
1145 SET_L_REG (code
->dst
.reg
, res
);
1146 goto just_flags_inc32
;
1150 rd
= GET_B_REG (code
->src
.reg
);
1153 SET_B_REG (code
->src
.reg
, res
);
1154 goto just_flags_inc8
;
1157 rd
= GET_W_REG (code
->dst
.reg
);
1158 ea
= code
->src
.literal
;
1160 SET_W_REG (code
->dst
.reg
, res
);
1161 goto just_flags_inc16
;
1164 rd
= GET_L_REG (code
->dst
.reg
);
1165 ea
= code
->src
.literal
;
1167 SET_L_REG (code
->dst
.reg
, res
);
1168 goto just_flags_inc32
;
1171 #define GET_CCR(x) BUILDSR();x = cpu.ccr
1173 case O (O_ANDC
, SB
):
1175 ea
= code
->src
.literal
;
1181 ea
= code
->src
.literal
;
1185 case O (O_XORC
, SB
):
1187 ea
= code
->src
.literal
;
1228 if (((Z
|| (N
^ V
)) == 0))
1234 if (((Z
|| (N
^ V
)) == 1))
1268 case O (O_SYSCALL
, SB
):
1270 char c
= cpu
.regs
[2];
1271 sim_callback
->write_stdout (sim_callback
, &c
, 1);
1275 ONOT (O_NOT
, rd
= ~rd
; v
= 0;);
1277 c
= rd
& hm
; v
= 0; rd
<<= 1,
1278 c
= rd
& (hm
>> 1); v
= 0; rd
<<= 2);
1280 c
= rd
& 1; v
= 0; rd
= (unsigned int) rd
>> 1,
1281 c
= rd
& 2; v
= 0; rd
= (unsigned int) rd
>> 2);
1283 c
= rd
& hm
; v
= (rd
& hm
) != ((rd
& (hm
>> 1)) << 1); rd
<<= 1,
1284 c
= rd
& (hm
>> 1); v
= (rd
& (hm
>> 1)) != ((rd
& (hm
>> 2)) << 2); rd
<<= 2);
1286 t
= rd
& hm
; c
= rd
& 1; v
= 0; rd
>>= 1; rd
|= t
,
1287 t
= rd
& hm
; c
= rd
& 2; v
= 0; rd
>>= 2; rd
|= t
| t
>> 1 );
1289 c
= rd
& hm
; v
= 0; rd
<<= 1; rd
|= C
,
1290 c
= rd
& hm
; v
= 0; rd
<<= 1; rd
|= C
; c
= rd
& hm
; rd
<<= 1; rd
|= C
);
1292 c
= rd
& 1; v
= 0; rd
= (unsigned int) rd
>> 1; if (c
) rd
|= hm
,
1293 c
= rd
& 1; v
= 0; rd
= (unsigned int) rd
>> 1; if (c
) rd
|= hm
; c
= rd
& 1; rd
= (unsigned int) rd
>> 1; if (c
) rd
|= hm
);
1295 t
= rd
& hm
; rd
<<= 1; rd
|= C
; c
= t
; v
= 0,
1296 t
= rd
& hm
; rd
<<= 1; rd
|= C
; c
= t
; v
= 0; t
= rd
& hm
; rd
<<= 1; rd
|= C
; c
= t
);
1298 t
= rd
& 1; rd
= (unsigned int) rd
>> 1; if (C
) rd
|= hm
; c
= t
; v
= 0,
1299 t
= rd
& 1; rd
= (unsigned int) rd
>> 1; if (C
) rd
|= hm
; c
= t
; v
= 0; t
= rd
& 1; rd
= (unsigned int) rd
>> 1; if (C
) rd
|= hm
; c
= t
);
1303 pc
= fetch (&code
->src
);
1311 pc
= fetch (&code
->src
);
1318 SET_MEMORY_L (tmp
, code
->next_pc
);
1323 SET_MEMORY_W (tmp
, code
->next_pc
);
1330 pc
= code
->src
.literal
;
1341 pc
= GET_MEMORY_L (tmp
);
1346 pc
= GET_MEMORY_W (tmp
);
1355 cpu
.state
= SIM_STATE_STOPPED
;
1356 cpu
.exception
= SIGILL
;
1358 case O (O_SLEEP
, SN
):
1359 /* FIXME: Doesn't this break for breakpoints when r0
1360 contains just the right (er, wrong) value? */
1361 cpu
.state
= SIM_STATE_STOPPED
;
1362 /* The format of r0 is defined by target newlib. Expand
1363 the macros here instead of looking for .../sys/wait.h. */
1364 #define SIM_WIFEXITED(v) (((v) & 0xff) == 0)
1365 #define SIM_WIFSIGNALED(v) (((v) & 0x7f) > 0 && (((v) & 0x7f) < 0x7f))
1366 if (! SIM_WIFEXITED (cpu
.regs
[0]) && SIM_WIFSIGNALED (cpu
.regs
[0]))
1367 cpu
.exception
= SIGILL
;
1369 cpu
.exception
= SIGTRAP
;
1372 cpu
.state
= SIM_STATE_STOPPED
;
1373 cpu
.exception
= SIGTRAP
;
1376 OBITOP (O_BNOT
, 1, 1, ea
^= m
);
1377 OBITOP (O_BTST
, 1, 0, nz
= ea
& m
);
1378 OBITOP (O_BCLR
, 1, 1, ea
&= ~m
);
1379 OBITOP (O_BSET
, 1, 1, ea
|= m
);
1380 OBITOP (O_BLD
, 1, 0, c
= ea
& m
);
1381 OBITOP (O_BILD
, 1, 0, c
= !(ea
& m
));
1382 OBITOP (O_BST
, 1, 1, ea
&= ~m
;
1384 OBITOP (O_BIST
, 1, 1, ea
&= ~m
;
1386 OBITOP (O_BAND
, 1, 0, c
= (ea
& m
) && C
);
1387 OBITOP (O_BIAND
, 1, 0, c
= !(ea
& m
) && C
);
1388 OBITOP (O_BOR
, 1, 0, c
= (ea
& m
) || C
);
1389 OBITOP (O_BIOR
, 1, 0, c
= !(ea
& m
) || C
);
1390 OBITOP (O_BXOR
, 1, 0, c
= (ea
& m
) != C
);
1391 OBITOP (O_BIXOR
, 1, 0, c
= !(ea
& m
) != C
);
1393 #define MOP(bsize, signed) \
1394 mop (code, bsize, signed); \
1397 case O (O_MULS
, SB
):
1400 case O (O_MULS
, SW
):
1403 case O (O_MULU
, SB
):
1406 case O (O_MULU
, SW
):
1411 case O (O_DIVU
, SB
):
1413 rd
= GET_W_REG (code
->dst
.reg
);
1414 ea
= GET_B_REG (code
->src
.reg
);
1417 tmp
= (unsigned) rd
% ea
;
1418 rd
= (unsigned) rd
/ ea
;
1420 SET_W_REG (code
->dst
.reg
, (rd
& 0xff) | (tmp
<< 8));
1426 case O (O_DIVU
, SW
):
1428 rd
= GET_L_REG (code
->dst
.reg
);
1429 ea
= GET_W_REG (code
->src
.reg
);
1434 tmp
= (unsigned) rd
% ea
;
1435 rd
= (unsigned) rd
/ ea
;
1437 SET_L_REG (code
->dst
.reg
, (rd
& 0xffff) | (tmp
<< 16));
1441 case O (O_DIVS
, SB
):
1444 rd
= SEXTSHORT (GET_W_REG (code
->dst
.reg
));
1445 ea
= SEXTCHAR (GET_B_REG (code
->src
.reg
));
1448 tmp
= (int) rd
% (int) ea
;
1449 rd
= (int) rd
/ (int) ea
;
1455 SET_W_REG (code
->dst
.reg
, (rd
& 0xff) | (tmp
<< 8));
1458 case O (O_DIVS
, SW
):
1460 rd
= GET_L_REG (code
->dst
.reg
);
1461 ea
= SEXTSHORT (GET_W_REG (code
->src
.reg
));
1464 tmp
= (int) rd
% (int) ea
;
1465 rd
= (int) rd
/ (int) ea
;
1466 n
= rd
& 0x80000000;
1471 SET_L_REG (code
->dst
.reg
, (rd
& 0xffff) | (tmp
<< 16));
1474 case O (O_EXTS
, SW
):
1475 rd
= GET_B_REG (code
->src
.reg
+ 8) & 0xff; /* Yes, src, not dst. */
1476 ea
= rd
& 0x80 ? -256 : 0;
1479 case O (O_EXTS
, SL
):
1480 rd
= GET_W_REG (code
->src
.reg
) & 0xffff;
1481 ea
= rd
& 0x8000 ? -65536 : 0;
1484 case O (O_EXTU
, SW
):
1485 rd
= GET_B_REG (code
->src
.reg
+ 8) & 0xff;
1489 case O (O_EXTU
, SL
):
1490 rd
= GET_W_REG (code
->src
.reg
) & 0xffff;
1500 int nregs
, firstreg
, i
;
1502 nregs
= GET_MEMORY_B (pc
+ 1);
1505 firstreg
= GET_MEMORY_B (pc
+ 3);
1507 for (i
= firstreg
; i
<= firstreg
+ nregs
; i
++)
1510 SET_MEMORY_L (cpu
.regs
[7], cpu
.regs
[i
]);
1517 int nregs
, firstreg
, i
;
1519 nregs
= GET_MEMORY_B (pc
+ 1);
1522 firstreg
= GET_MEMORY_B (pc
+ 3);
1524 for (i
= firstreg
; i
>= firstreg
- nregs
; i
--)
1526 cpu
.regs
[i
] = GET_MEMORY_L (cpu
.regs
[7]);
1533 cpu
.state
= SIM_STATE_STOPPED
;
1534 cpu
.exception
= SIGILL
;
1546 /* When a branch works */
1547 pc
= code
->src
.literal
;
1550 /* Set the cond codes from res */
1553 /* Set the flags after an 8 bit inc/dec operation */
1557 v
= (rd
& 0x7f) == 0x7f;
1561 /* Set the flags after an 16 bit inc/dec operation */
1565 v
= (rd
& 0x7fff) == 0x7fff;
1569 /* Set the flags after an 32 bit inc/dec operation */
1571 n
= res
& 0x80000000;
1572 nz
= res
& 0xffffffff;
1573 v
= (rd
& 0x7fffffff) == 0x7fffffff;
1578 /* Set flags after an 8 bit shift op, carry,overflow set in insn */
1581 SET_B_REG (code
->src
.reg
, rd
);
1585 /* Set flags after an 16 bit shift op, carry,overflow set in insn */
1588 SET_W_REG (code
->src
.reg
, rd
);
1592 /* Set flags after an 32 bit shift op, carry,overflow set in insn */
1593 n
= (rd
& 0x80000000);
1594 nz
= rd
& 0xffffffff;
1595 SET_L_REG (code
->src
.reg
, rd
);
1599 store (&code
->dst
, res
);
1601 /* flags after a 32bit logical operation */
1602 n
= res
& 0x80000000;
1603 nz
= res
& 0xffffffff;
1608 store (&code
->dst
, res
);
1610 /* flags after a 16bit logical operation */
1618 store (&code
->dst
, res
);
1626 SET_B_REG (code
->dst
.reg
, res
);
1631 switch (code
->opcode
/ 4)
1634 v
= ((rd
& 0x80) == (ea
& 0x80)
1635 && (rd
& 0x80) != (res
& 0x80));
1639 v
= ((rd
& 0x80) != (-ea
& 0x80)
1640 && (rd
& 0x80) != (res
& 0x80));
1649 SET_W_REG (code
->dst
.reg
, res
);
1653 c
= (res
& 0x10000);
1654 switch (code
->opcode
/ 4)
1657 v
= ((rd
& 0x8000) == (ea
& 0x8000)
1658 && (rd
& 0x8000) != (res
& 0x8000));
1662 v
= ((rd
& 0x8000) != (-ea
& 0x8000)
1663 && (rd
& 0x8000) != (res
& 0x8000));
1672 SET_L_REG (code
->dst
.reg
, res
);
1674 n
= res
& 0x80000000;
1675 nz
= res
& 0xffffffff;
1676 switch (code
->opcode
/ 4)
1679 v
= ((rd
& 0x80000000) == (ea
& 0x80000000)
1680 && (rd
& 0x80000000) != (res
& 0x80000000));
1681 c
= ((unsigned) res
< (unsigned) rd
) || ((unsigned) res
< (unsigned) ea
);
1685 v
= ((rd
& 0x80000000) != (-ea
& 0x80000000)
1686 && (rd
& 0x80000000) != (res
& 0x80000000));
1687 c
= (unsigned) rd
< (unsigned) -ea
;
1690 v
= (rd
== 0x80000000);
1706 if (--poll_count
< 0)
1708 poll_count
= POLL_QUIT_INTERVAL
;
1709 if ((*sim_callback
->poll_quit
) != NULL
1710 && (*sim_callback
->poll_quit
) (sim_callback
))
1715 while (cpu
.state
== SIM_STATE_RUNNING
);
1716 cpu
.ticks
+= get_now () - tick_start
;
1717 cpu
.cycles
+= cycles
;
1723 signal (SIGINT
, prev
);
1730 /* FIXME: Unfinished. */
1735 sim_write (sd
, addr
, buffer
, size
)
1738 unsigned char *buffer
;
1746 for (i
= 0; i
< size
; i
++)
1748 if (addr
< memory_size
)
1750 cpu
.memory
[addr
+ i
] = buffer
[i
];
1751 cpu
.cache_idx
[addr
+ i
] = 0;
1754 cpu
.eightbit
[(addr
+ i
) & 0xff] = buffer
[i
];
1760 sim_read (sd
, addr
, buffer
, size
)
1763 unsigned char *buffer
;
1769 if (addr
< memory_size
)
1770 memcpy (buffer
, cpu
.memory
+ addr
, size
);
1772 memcpy (buffer
, cpu
.eightbit
+ (addr
& 0xff), size
);
1786 #define SP_REGNUM R7_REGNUM /* Contains address of top of stack */
1787 #define FP_REGNUM R6_REGNUM /* Contains address of executing
1790 #define CCR_REGNUM 8 /* Contains processor status */
1791 #define PC_REGNUM 9 /* Contains program counter */
1793 #define CYCLE_REGNUM 10
1794 #define INST_REGNUM 11
1795 #define TICK_REGNUM 12
1799 sim_store_register (sd
, rn
, value
, length
)
1802 unsigned char *value
;
1808 longval
= (value
[0] << 24) | (value
[1] << 16) | (value
[2] << 8) | value
[3];
1809 shortval
= (value
[0] << 8) | (value
[1]);
1810 intval
= h8300hmode
? longval
: shortval
;
1828 cpu
.regs
[rn
] = intval
;
1834 cpu
.cycles
= longval
;
1838 cpu
.insts
= longval
;
1842 cpu
.ticks
= longval
;
1849 sim_fetch_register (sd
, rn
, buf
, length
)
1893 if (h8300hmode
|| longreg
)
1909 sim_stop_reason (sd
, reason
, sigrc
)
1911 enum sim_stop
*reason
;
1914 #if 0 /* FIXME: This should work but we can't use it.
1915 grep for SLEEP above. */
1918 case SIM_STATE_EXITED
: *reason
= sim_exited
; break;
1919 case SIM_STATE_SIGNALLED
: *reason
= sim_signalled
; break;
1920 case SIM_STATE_STOPPED
: *reason
= sim_stopped
; break;
1924 *reason
= sim_stopped
;
1926 *sigrc
= cpu
.exception
;
1929 /* FIXME: Rename to sim_set_mem_size. */
1935 /* Memory size is fixed. */
1939 sim_set_simcache_size (n
)
1945 cpu
.cache
= (decoded_inst
*) malloc (sizeof (decoded_inst
) * n
);
1946 memset (cpu
.cache
, 0, sizeof (decoded_inst
) * n
);
1952 sim_info (sd
, verbose
)
1956 double timetaken
= (double) cpu
.ticks
/ (double) now_persec ();
1957 double virttime
= cpu
.cycles
/ 10.0e6
;
1959 (*sim_callback
->printf_filtered
) (sim_callback
,
1960 "\n\n#instructions executed %10d\n",
1962 (*sim_callback
->printf_filtered
) (sim_callback
,
1963 "#cycles (v approximate) %10d\n",
1965 (*sim_callback
->printf_filtered
) (sim_callback
,
1966 "#real time taken %10.4f\n",
1968 (*sim_callback
->printf_filtered
) (sim_callback
,
1969 "#virtual time taked %10.4f\n",
1971 if (timetaken
!= 0.0)
1972 (*sim_callback
->printf_filtered
) (sim_callback
,
1973 "#simulation ratio %10.4f\n",
1974 virttime
/ timetaken
);
1975 (*sim_callback
->printf_filtered
) (sim_callback
,
1978 (*sim_callback
->printf_filtered
) (sim_callback
,
1979 "#cache size %10d\n",
1983 /* This to be conditional on `what' (aka `verbose'),
1984 however it was never passed as non-zero. */
1988 for (i
= 0; i
< O_LAST
; i
++)
1991 (*sim_callback
->printf_filtered
) (sim_callback
,
1992 "%d: %d\n", i
, cpu
.stats
[i
]);
1998 /* Indicate whether the cpu is an H8/300 or H8/300H.
1999 FLAG is non-zero for the H8/300H. */
2005 /* FIXME: Much of the code in sim_load can be moved to sim_open.
2006 This function being replaced by a sim_open:ARGV configuration
2012 sim_open (kind
, ptr
, abfd
, argv
)
2014 struct host_callback_struct
*ptr
;
2018 /* FIXME: Much of the code in sim_load can be moved here. */
2023 /* Fudge our descriptor. */
2024 return (SIM_DESC
) 1;
2028 sim_close (sd
, quitting
)
2032 /* Nothing to do. */
2035 /* Called by gdb to load a program into memory. */
2038 sim_load (sd
, prog
, abfd
, from_tty
)
2046 /* FIXME: The code below that sets a specific variant of the H8/300
2047 being simulated should be moved to sim_open(). */
2049 /* See if the file is for the H8/300 or H8/300H. */
2050 /* ??? This may not be the most efficient way. The z8k simulator
2051 does this via a different mechanism (INIT_EXTRA_SYMTAB_INFO). */
2055 prog_bfd
= bfd_openr (prog
, "coff-h8300");
2056 if (prog_bfd
!= NULL
)
2058 /* Set the cpu type. We ignore failure from bfd_check_format
2059 and bfd_openr as sim_load_file checks too. */
2060 if (bfd_check_format (prog_bfd
, bfd_object
))
2062 unsigned long mach
= bfd_get_mach (prog_bfd
);
2063 set_h8300h (mach
== bfd_mach_h8300h
2064 || mach
== bfd_mach_h8300s
);
2068 /* If we're using gdb attached to the simulator, then we have to
2069 reallocate memory for the simulator.
2071 When gdb first starts, it calls fetch_registers (among other
2072 functions), which in turn calls init_pointers, which allocates
2075 The problem is when we do that, we don't know whether we're
2076 debugging an H8/300 or H8/300H program.
2078 This is the first point at which we can make that determination,
2079 so we just reallocate memory now; this will also allow us to handle
2080 switching between H8/300 and H8/300H programs without exiting
2083 memory_size
= H8300H_MSIZE
;
2085 memory_size
= H8300_MSIZE
;
2090 free (cpu
.cache_idx
);
2092 free (cpu
.eightbit
);
2094 cpu
.memory
= (unsigned char *) calloc (sizeof (char), memory_size
);
2095 cpu
.cache_idx
= (unsigned short *) calloc (sizeof (short), memory_size
);
2096 cpu
.eightbit
= (unsigned char *) calloc (sizeof (char), 256);
2098 /* `msize' must be a power of two. */
2099 if ((memory_size
& (memory_size
- 1)) != 0)
2101 cpu
.mask
= memory_size
- 1;
2103 if (sim_load_file (sd
, myname
, sim_callback
, prog
, prog_bfd
,
2104 sim_kind
== SIM_OPEN_DEBUG
,
2108 /* Close the bfd if we opened it. */
2109 if (abfd
== NULL
&& prog_bfd
!= NULL
)
2110 bfd_close (prog_bfd
);
2114 /* Close the bfd if we opened it. */
2115 if (abfd
== NULL
&& prog_bfd
!= NULL
)
2116 bfd_close (prog_bfd
);
2121 sim_create_inferior (sd
, abfd
, argv
, env
)
2128 cpu
.pc
= bfd_get_start_address (abfd
);
2135 sim_do_command (sd
, cmd
)
2139 (*sim_callback
->printf_filtered
) (sim_callback
,
2140 "This simulator does not accept any commands.\n");
2144 sim_set_callbacks (ptr
)
2145 struct host_callback_struct
*ptr
;
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