1 /* Disassemble h8300 instructions.
2 Copyright (C) 1993, 1998 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 #define h8_opcodes h8ops
22 #include "opcode/h8300.h"
27 /* Run through the opcodes and sort them into order to make them easy
31 bfd_h8_disassemble_init ()
38 for (p
= h8_opcodes
; p
->name
; p
++)
43 if ((int) p
->data
.nib
[0] < 16)
45 n1
= (int) p
->data
.nib
[0];
49 if ((int) p
->data
.nib
[1] < 16)
51 n2
= (int) p
->data
.nib
[1];
56 /* Just make sure there are an even number of nibbles in it, and
57 that the count is the same s the length */
58 for (i
= 0; p
->data
.nib
[i
] != E
; i
++)
69 bfd_h8_disassemble (addr
, info
, mode
)
71 disassemble_info
*info
;
74 /* Find the first entry in the table for this opcode */
75 static CONST
char *regnames
[] =
77 "r0h", "r1h", "r2h", "r3h", "r4h", "r5h", "r6h", "r7h",
78 "r0l", "r1l", "r2l", "r3l", "r4l", "r5l", "r6l", "r7l"};
80 static CONST
char *wregnames
[] =
82 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
83 "e0", "e1", "e2", "e3", "e4", "e5", "e6", "e7"
86 static CONST
char *lregnames
[] =
88 "er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7",
89 "er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7"
99 static boolean init
= 0;
100 struct h8_opcode
*q
= h8_opcodes
;
101 char CONST
**pregnames
= mode
!= 0 ? lregnames
: wregnames
;
105 unsigned char data
[20];
106 void *stream
= info
->stream
;
107 fprintf_ftype fprintf
= info
->fprintf_func
;
111 bfd_h8_disassemble_init ();
115 status
= info
->read_memory_func(addr
, data
, 2, info
);
118 info
->memory_error_func(status
, addr
, info
);
121 for (l
= 2; status
== 0 && l
< 10; l
+=2)
123 status
= info
->read_memory_func(addr
+l
, data
+l
, 2, info
);
128 /* Find the exact opcode/arg combo */
132 unsigned int len
= 0;
138 op_type looking_for
= *nib
;
139 int thisnib
= data
[len
>> 1];
141 thisnib
= (len
& 1) ? (thisnib
& 0xf) : ((thisnib
>> 4) & 0xf);
143 if (looking_for
< 16 && looking_for
>=0)
146 if (looking_for
!= thisnib
)
153 if ((int) looking_for
& (int) B31
)
155 if (! (((int) thisnib
& 0x8) != 0))
157 looking_for
= (op_type
) ((int) looking_for
& ~(int) B31
);
159 if ((int) looking_for
& (int) B30
)
161 if (!(((int) thisnib
& 0x8) == 0))
163 looking_for
= (op_type
) ((int) looking_for
& ~(int) B30
);
166 if (looking_for
& DBIT
)
168 if ((looking_for
& 5) != (thisnib
&5)) goto fail
;
169 abs
= (thisnib
& 0x8) ? 2 : 1;
172 else if (looking_for
& (REG
| IND
|INC
|DEC
))
174 if (looking_for
& SRC
)
183 else if (looking_for
& L_16
)
185 abs
= (data
[len
>> 1]) * 256 + data
[(len
+ 2) >> 1];
189 else if(looking_for
& ABSJMP
)
196 else if(looking_for
& MEMIND
)
200 else if (looking_for
& L_32
)
203 abs
= (data
[i
] << 24)
204 | (data
[i
+ 1] << 16)
211 else if (looking_for
& L_24
)
214 abs
= (data
[i
] << 16) | (data
[i
+ 1] << 8)| (data
[i
+2]);
217 else if (looking_for
& IGNORE
)
221 else if (looking_for
& DISPREG
)
225 else if (looking_for
& KBIT
)
242 else if (looking_for
& L_8
)
245 abs
= data
[len
>> 1];
247 else if (looking_for
& L_3
)
251 else if (looking_for
& L_2
)
256 else if (looking_for
& MACREG
)
258 abs
= (thisnib
== 3);
260 else if (looking_for
== E
)
266 for (i
= 0; i
< q
->length
; i
++)
268 fprintf (stream
, "%02x ", data
[i
]);
272 fprintf (stream
, " ");
275 fprintf (stream
, "%s\t", q
->name
);
277 /* Gross. Disgusting. */
278 if (strcmp (q
->name
, "ldm.l") == 0)
282 count
= (data
[1] >> 4) & 0x3;
283 high
= data
[3] & 0x7;
285 fprintf (stream
, "@sp+,er%d-er%d", high
- count
, high
);
289 if (strcmp (q
->name
, "stm.l") == 0)
293 count
= (data
[1] >> 4) & 0x3;
296 fprintf (stream
, "er%d-er%d,@-sp", low
, low
+ count
);
300 /* Fill in the args */
302 op_type
*args
= q
->args
.nib
;
310 fprintf (stream
, ",");
315 fprintf (stream
, "#0x%x", (unsigned) bit
);
317 else if (x
& (IMM
|KBIT
|DBIT
))
319 /* Bletch. For shal #2,er0 and friends. */
320 if (*(args
+1) & SRC_IN_DST
)
323 fprintf (stream
, "#0x%x", (unsigned) abs
);
327 int rn
= (x
& DST
) ? rd
: rs
;
331 fprintf (stream
, "%s", regnames
[rn
]);
334 fprintf (stream
, "%s", wregnames
[rn
]);
338 fprintf (stream
, "%s", lregnames
[rn
]);
345 fprintf (stream
, "mac%c", abs
? 'l' : 'h');
349 fprintf (stream
, "@%s+", pregnames
[rs
]);
353 fprintf (stream
, "@-%s", pregnames
[rd
]);
358 int rn
= (x
& DST
) ? rd
: rs
;
359 fprintf (stream
, "@%s", pregnames
[rn
]);
362 else if (x
& ABS8MEM
)
364 fprintf (stream
, "@0x%x:8", (unsigned) abs
);
367 else if (x
& (ABS
|ABSJMP
))
369 fprintf (stream
, "@0x%x:%d", (unsigned) abs
, plen
);
374 fprintf (stream
, "@@%d (%x)", abs
, abs
);
382 fprintf (stream
, ".%s%d (%x)", (short) abs
> 0 ? "+" : "", (short) abs
,
383 addr
+ (short) abs
+ 2);
386 fprintf (stream
, ".%s%d (%x)", (char) abs
> 0 ? "+" : "", (char) abs
,
387 addr
+ (char) abs
+ 2);
392 fprintf (stream
, "@(0x%x:%d,%s)", abs
,plen
, pregnames
[rdisp
]);
397 fprintf (stream
, "ccr");
401 fprintf (stream
, "exr");
404 /* xgettext:c-format */
405 fprintf (stream
, _("Hmmmm %x"), x
);
416 /* xgettext:c-format */
417 fprintf (stream
, _("Don't understand %x \n"), looking_for
);
429 /* Fell of the end */
430 fprintf (stream
, "%02x %02x .word\tH'%x,H'%x",
437 print_insn_h8300 (addr
, info
)
439 disassemble_info
*info
;
441 return bfd_h8_disassemble (addr
, info
, 0);
445 print_insn_h8300h (addr
, info
)
447 disassemble_info
*info
;
449 return bfd_h8_disassemble (addr
, info
, 1);
453 print_insn_h8300s (addr
, info
)
455 disassemble_info
*info
;
457 return bfd_h8_disassemble (addr
, info
, 2);
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