]>
git.ipfire.org Git - thirdparty/binutils-gdb.git/blob - sim/mn10300/interp.c
5 #include "mn10300_sim.h"
15 host_callback
*mn10300_callback
;
17 static SIM_OPEN_KIND sim_kind
;
20 static void dispatch
PARAMS ((uint32
, uint32
, int));
21 static long hash
PARAMS ((long));
22 static void init_system
PARAMS ((void));
27 struct hash_entry
*next
;
36 static int max_mem
= 0;
37 struct hash_entry hash_table
[MAX_HASH
+1];
40 /* This probably doesn't do a very good job at bucket filling, but
46 /* These are one byte insns, we special case these since, in theory,
47 they should be the most heavily used. */
48 if ((insn
& 0xffffff00) == 0)
93 /* These are two byte insns */
94 if ((insn
& 0xffff0000) == 0)
96 if ((insn
& 0xf000) == 0x2000
97 || (insn
& 0xf000) == 0x5000)
98 return ((insn
& 0xfc00) >> 8) & 0x7f;
100 if ((insn
& 0xf000) == 0x4000)
101 return ((insn
& 0xf300) >> 8) & 0x7f;
103 if ((insn
& 0xf000) == 0x8000
104 || (insn
& 0xf000) == 0x9000
105 || (insn
& 0xf000) == 0xa000
106 || (insn
& 0xf000) == 0xb000)
107 return ((insn
& 0xf000) >> 8) & 0x7f;
109 if ((insn
& 0xff00) == 0xf000
110 || (insn
& 0xff00) == 0xf100
111 || (insn
& 0xff00) == 0xf200
112 || (insn
& 0xff00) == 0xf500
113 || (insn
& 0xff00) == 0xf600)
114 return ((insn
& 0xfff0) >> 4) & 0x7f;
116 if ((insn
& 0xf000) == 0xc000)
117 return ((insn
& 0xff00) >> 8) & 0x7f;
119 return ((insn
& 0xffc0) >> 6) & 0x7f;
122 /* These are three byte insns. */
123 if ((insn
& 0xff000000) == 0)
125 if ((insn
& 0xf00000) == 0x000000)
126 return ((insn
& 0xf30000) >> 16) & 0x7f;
128 if ((insn
& 0xf00000) == 0x200000
129 || (insn
& 0xf00000) == 0x300000)
130 return ((insn
& 0xfc0000) >> 16) & 0x7f;
132 if ((insn
& 0xff0000) == 0xf80000)
133 return ((insn
& 0xfff000) >> 12) & 0x7f;
135 if ((insn
& 0xff0000) == 0xf90000)
136 return ((insn
& 0xfffc00) >> 10) & 0x7f;
138 return ((insn
& 0xff0000) >> 16) & 0x7f;
141 /* These are four byte or larger insns. */
142 if ((insn
& 0xf0000000) == 0xf0000000)
143 return ((insn
& 0xfff00000) >> 20) & 0x7f;
145 return ((insn
& 0xff000000) >> 24) & 0x7f;
149 dispatch (insn
, extension
, length
)
154 struct hash_entry
*h
;
156 h
= &hash_table
[hash(insn
)];
158 while ((insn
& h
->mask
) != h
->opcode
159 || (length
!= h
->ops
->length
))
163 (*mn10300_callback
->printf_filtered
) (mn10300_callback
,
164 "ERROR looking up hash for 0x%x, PC=0x%x\n", insn
, PC
);
175 /* Now call the right function. */
176 (h
->ops
->func
)(insn
, extension
);
180 /* FIXME These would more efficient to use than load_mem/store_mem,
181 but need to be changed to use the memory map. */
195 return (a
[1] << 8) + (a
[0]);
203 return (a
[3]<<24) + (a
[2]<<16) + (a
[1]<<8) + (a
[0]);
207 put_byte (addr
, data
)
216 put_half (addr
, data
)
222 a
[1] = (data
>> 8) & 0xff;
226 put_word (addr
, data
)
232 a
[1] = (data
>> 8) & 0xff;
233 a
[2] = (data
>> 16) & 0xff;
234 a
[3] = (data
>> 24) & 0xff;
242 uint8
*p
= addr
+ State
.mem
;
252 return p
[1] << 8 | p
[0];
254 return p
[2] << 16 | p
[1] << 8 | p
[0];
256 return p
[3] << 24 | p
[2] << 16 | p
[1] << 8 | p
[0];
263 store_mem (addr
, len
, data
)
268 uint8
*p
= addr
+ State
.mem
;
301 max_mem
= 1 << power
;
302 State
.mem
= (uint8
*) calloc (1, 1 << power
);
305 (*mn10300_callback
->printf_filtered
) (mn10300_callback
, "Allocation of main memory failed.\n");
318 sim_write (sd
, addr
, buffer
, size
)
321 unsigned char *buffer
;
328 for (i
= 0; i
< size
; i
++)
329 store_mem (addr
+ i
, 1, buffer
[i
]);
334 /* Compare two opcode table entries for qsort. */
336 compare_simops (arg1
, arg2
)
340 unsigned long code1
= ((struct simops
*)arg1
)->opcode
;
341 unsigned long code2
= ((struct simops
*)arg2
)->opcode
;
356 struct hash_entry
*h
;
360 /* Sort the opcode array from smallest opcode to largest.
361 This will generally improve simulator performance as the smaller
362 opcodes are generally preferred to the larger opcodes. */
363 for (i
= 0, s
= Simops
; s
->func
; s
++, i
++)
365 qsort (Simops
, i
, sizeof (Simops
[0]), compare_simops
);
370 for (p
= argv
+ 1; *p
; ++p
)
372 if (strcmp (*p
, "-E") == 0)
373 ++p
; /* ignore endian spec */
376 if (strcmp (*p
, "-t") == 0)
377 mn10300_debug
= DEBUG
;
380 (*mn10300_callback
->printf_filtered
) (mn10300_callback
, "ERROR: unsupported option(s): %s\n",*p
);
383 /* put all the opcodes in the hash table */
384 for (s
= Simops
; s
->func
; s
++)
386 h
= &hash_table
[hash(s
->opcode
)];
388 /* go to the last entry in the chain */
391 /* Don't insert the same opcode more than once. */
392 if (h
->opcode
== s
->opcode
393 && h
->mask
== s
->mask
400 /* Don't insert the same opcode more than once. */
401 if (h
->opcode
== s
->opcode
402 && h
->mask
== s
->mask
408 h
->next
= calloc(1,sizeof(struct hash_entry
));
413 h
->opcode
= s
->opcode
;
420 /* fudge our descriptor for now */
426 sim_close (sd
, quitting
)
437 (*mn10300_callback
->printf_filtered
) (mn10300_callback
, "sim_set_profile %d\n", n
);
441 sim_set_profile_size (n
)
444 (*mn10300_callback
->printf_filtered
) (mn10300_callback
, "sim_set_profile_size %d\n", n
);
455 sim_resume (sd
, step
, siggnal
)
461 struct hash_entry
*h
;
464 State
.exception
= SIGTRAP
;
470 unsigned long insn
, extension
;
472 /* Fetch the current instruction. */
473 inst
= load_mem_big (PC
, 2);
476 /* Using a giant case statement may seem like a waste because of the
477 code/rodata size the table itself will consume. However, using
478 a giant case statement speeds up the simulator by 10-15% by avoiding
479 cascading if/else statements or cascading case statements. */
481 switch ((inst
>> 8) & 0xff)
483 /* All the single byte insns except 0x80, 0x90, 0xa0, 0xb0
484 which must be handled specially. */
586 insn
= (inst
>> 8) & 0xff;
588 dispatch (insn
, extension
, 1);
591 /* Special cases where dm == dn is used to encode a different
611 dispatch (insn
, extension
, 2);
662 insn
= (inst
>> 8) & 0xff;
664 dispatch (insn
, extension
, 1);
667 /* The two byte instructions. */
714 dispatch (insn
, extension
, 2);
717 /* The three byte insns with a 16bit operand in little endian
752 insn
= load_mem (PC
, 1);
754 insn
|= load_mem (PC
+ 1, 2);
756 dispatch (insn
, extension
, 3);
759 /* The three byte insns without 16bit operand. */
764 insn
= load_mem_big (PC
, 3);
766 dispatch (insn
, extension
, 3);
769 /* Four byte insns. */
772 if ((inst
& 0xfffc) == 0xfaf0
773 || (inst
& 0xfffc) == 0xfaf4
774 || (inst
& 0xfffc) == 0xfaf8)
775 insn
= load_mem_big (PC
, 4);
780 insn
|= load_mem (PC
+ 2, 2);
783 dispatch (insn
, extension
, 4);
786 /* Five byte insns. */
788 insn
= load_mem (PC
, 1);
790 insn
|= (load_mem (PC
+ 1, 2) << 8);
791 insn
|= load_mem (PC
+ 3, 1);
792 extension
= load_mem (PC
+ 4, 1);
793 dispatch (insn
, extension
, 5);
797 insn
= load_mem (PC
, 1);
799 extension
= load_mem (PC
+ 1, 4);
800 insn
|= (extension
& 0xffffff00) >> 8;
802 dispatch (insn
, extension
, 5);
805 /* Six byte insns. */
809 extension
= load_mem (PC
+ 2, 4);
810 insn
|= ((extension
& 0xffff0000) >> 16);
812 dispatch (insn
, extension
, 6);
816 insn
= load_mem (PC
, 1) << 24;
817 extension
= load_mem (PC
+ 1, 4);
818 insn
|= ((extension
>> 8) & 0xffffff);
819 extension
= (extension
& 0xff) << 16;
820 extension
|= load_mem (PC
+ 5, 1) << 8;
821 extension
|= load_mem (PC
+ 6, 1);
822 dispatch (insn
, extension
, 7);
827 extension
= load_mem (PC
+ 2, 4);
828 insn
|= ((extension
>> 16) & 0xffff);
830 extension
&= 0xffff00;
831 extension
|= load_mem (PC
+ 6, 1);
832 dispatch (insn
, extension
, 7);
839 while (!State
.exception
);
844 for (i
= 0; i
< MAX_HASH
; i
++)
846 struct hash_entry
*h
;
849 printf("hash 0x%x:\n", i
);
853 printf("h->opcode = 0x%x, count = 0x%x\n", h
->opcode
, h
->count
);
870 mn10300_debug
= DEBUG
;
872 sim_resume (sd
, 0, 0);
877 sim_info (sd
, verbose
)
881 (*mn10300_callback
->printf_filtered
) (mn10300_callback
, "sim_info\n");
885 sim_create_inferior (sd
, argv
, env
)
901 sim_set_callbacks (sd
, p
)
905 mn10300_callback
= p
;
908 /* All the code for exiting, signals, etc needs to be revamped.
910 This is enough to get c-torture limping though. */
913 sim_stop_reason (sd
, reason
, sigrc
)
915 enum sim_stop
*reason
;
918 *reason
= sim_stopped
;
919 if (State
.exception
== SIGQUIT
)
922 *sigrc
= State
.exception
;
926 sim_fetch_register (sd
, rn
, memory
)
929 unsigned char *memory
;
931 put_word (memory
, State
.regs
[rn
]);
935 sim_store_register (sd
, rn
, memory
)
938 unsigned char *memory
;
940 State
.regs
[rn
] = get_word (memory
);
944 sim_read (sd
, addr
, buffer
, size
)
947 unsigned char *buffer
;
951 for (i
= 0; i
< size
; i
++)
952 buffer
[i
] = load_mem (addr
+ i
, 1);
958 sim_do_command (sd
, cmd
)
962 (*mn10300_callback
->printf_filtered
) (mn10300_callback
, "\"%s\" is not a valid mn10300 simulator command.\n", cmd
);
966 sim_load (sd
, prog
, abfd
, from_tty
)
972 extern bfd
*sim_load_file (); /* ??? Don't know where this should live. */
975 prog_bfd
= sim_load_file (sd
, myname
, mn10300_callback
, prog
, abfd
,
976 sim_kind
== SIM_OPEN_DEBUG
);
977 if (prog_bfd
== NULL
)
979 PC
= bfd_get_start_address (prog_bfd
);
981 bfd_close (prog_bfd
);