1 /* Disassemble h8300 instructions.
2 Copyright (C) 1993, 1998, 2000 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
30 bfd_h8_disassemble_init ()
35 for (p
= h8_opcodes
; p
->name
; p
++)
40 if ((int) p
->data
.nib
[0] < 16)
42 n1
= (int) p
->data
.nib
[0];
47 if ((int) p
->data
.nib
[1] < 16)
49 n2
= (int) p
->data
.nib
[1];
54 /* Just make sure there are an even number of nibbles in it, and
55 that the count is the same as the length. */
56 for (i
= 0; p
->data
.nib
[i
] != E
; i
++)
68 bfd_h8_disassemble (addr
, info
, mode
)
70 disassemble_info
*info
;
73 /* Find the first entry in the table for this opcode. */
74 static CONST
char *regnames
[] =
76 "r0h", "r1h", "r2h", "r3h", "r4h", "r5h", "r6h", "r7h",
77 "r0l", "r1l", "r2l", "r3l", "r4l", "r5l", "r6l", "r7l"
79 static CONST
char *wregnames
[] =
81 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
82 "e0", "e1", "e2", "e3", "e4", "e5", "e6", "e7"
85 static CONST
char *lregnames
[] =
87 "er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7",
88 "er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7"
97 static boolean init
= 0;
98 struct h8_opcode
*q
= h8_opcodes
;
99 char CONST
**pregnames
= mode
!= 0 ? lregnames
: wregnames
;
102 unsigned char data
[20];
103 void *stream
= info
->stream
;
104 fprintf_ftype fprintf
= info
->fprintf_func
;
108 bfd_h8_disassemble_init ();
112 status
= info
->read_memory_func (addr
, data
, 2, info
);
115 info
->memory_error_func (status
, addr
, info
);
119 for (l
= 2; status
== 0 && l
< 10; l
+= 2)
120 status
= info
->read_memory_func(addr
+l
, data
+l
, 2, info
);
122 /* Find the exact opcode/arg combo. */
126 unsigned int len
= 0;
132 op_type looking_for
= *nib
;
133 int thisnib
= data
[len
>> 1];
135 thisnib
= (len
& 1) ? (thisnib
& 0xf) : ((thisnib
>> 4) & 0xf);
137 if (looking_for
< 16 && looking_for
>=0)
139 if (looking_for
!= thisnib
)
144 if ((int) looking_for
& (int) B31
)
146 if (! (((int) thisnib
& 0x8) != 0))
148 looking_for
= (op_type
) ((int) looking_for
& ~(int) B31
);
151 if ((int) looking_for
& (int) B30
)
153 if (!(((int) thisnib
& 0x8) == 0))
155 looking_for
= (op_type
) ((int) looking_for
& ~(int) B30
);
158 if (looking_for
& DBIT
)
160 if ((looking_for
& 2) != (thisnib
& 2))
162 abs
= (thisnib
& 0x8) ? 2 : 1;
164 else if (looking_for
& (REG
| IND
|INC
|DEC
))
166 if (looking_for
& SRC
)
171 else if (looking_for
& L_16
)
173 abs
= (data
[len
>> 1]) * 256 + data
[(len
+ 2) >> 1];
176 else if (looking_for
& ABSJMP
)
183 else if (looking_for
& MEMIND
)
187 else if (looking_for
& L_32
)
191 abs
= (data
[i
] << 24)
192 | (data
[i
+ 1] << 16)
198 else if (looking_for
& L_24
)
201 abs
= (data
[i
] << 16) | (data
[i
+ 1] << 8)| (data
[i
+2]);
204 else if (looking_for
& IGNORE
)
208 else if (looking_for
& DISPREG
)
212 else if (looking_for
& KBIT
)
229 else if (looking_for
& L_8
)
232 abs
= data
[len
>> 1];
234 else if (looking_for
& L_3
)
238 else if (looking_for
& L_2
)
243 else if (looking_for
& MACREG
)
245 abs
= (thisnib
== 3);
247 else if (looking_for
== E
)
251 for (i
= 0; i
< q
->length
; i
++)
252 fprintf (stream
, "%02x ", data
[i
]);
255 fprintf (stream
, " ");
257 fprintf (stream
, "%s\t", q
->name
);
259 /* Gross. Disgusting. */
260 if (strcmp (q
->name
, "ldm.l") == 0)
264 count
= (data
[1] >> 4) & 0x3;
265 high
= data
[3] & 0x7;
267 fprintf (stream
, "@sp+,er%d-er%d", high
- count
, high
);
271 if (strcmp (q
->name
, "stm.l") == 0)
275 count
= (data
[1] >> 4) & 0x3;
278 fprintf (stream
, "er%d-er%d,@-sp", low
, low
+ count
);
282 /* Fill in the args. */
284 op_type
*args
= q
->args
.nib
;
292 fprintf (stream
, ",");
296 fprintf (stream
, "#0x%x", (unsigned) bit
);
298 else if (x
& (IMM
|KBIT
|DBIT
))
300 /* Bletch. For shal #2,er0 and friends. */
301 if (*(args
+1) & SRC_IN_DST
)
304 fprintf (stream
, "#0x%x", (unsigned) abs
);
308 int rn
= (x
& DST
) ? rd
: rs
;
313 fprintf (stream
, "%s", regnames
[rn
]);
316 fprintf (stream
, "%s", wregnames
[rn
]);
320 fprintf (stream
, "%s", lregnames
[rn
]);
326 fprintf (stream
, "mac%c", abs
? 'l' : 'h');
330 fprintf (stream
, "@%s+", pregnames
[rs
]);
334 fprintf (stream
, "@-%s", pregnames
[rd
]);
338 int rn
= (x
& DST
) ? rd
: rs
;
339 fprintf (stream
, "@%s", pregnames
[rn
]);
341 else if (x
& ABS8MEM
)
343 fprintf (stream
, "@0x%x:8", (unsigned) abs
);
345 else if (x
& (ABS
|ABSJMP
))
347 fprintf (stream
, "@0x%x:%d", (unsigned) abs
, plen
);
351 fprintf (stream
, "@@%d (%x)", abs
, abs
);
358 fprintf (stream
, ".%s%d (%x)", (short) abs
> 0 ? "+" : "", (short) abs
,
359 addr
+ (short) abs
+ 2);
363 fprintf (stream
, ".%s%d (%x)", (char) abs
> 0 ? "+" : "", (char) abs
,
364 addr
+ (char) abs
+ 2);
369 fprintf (stream
, "@(0x%x:%d,%s)", abs
,plen
, pregnames
[rdisp
]);
373 fprintf (stream
, "ccr");
377 fprintf (stream
, "exr");
380 /* xgettext:c-format */
381 fprintf (stream
, _("Hmmmm %x"), x
);
391 /* xgettext:c-format */
392 fprintf (stream
, _("Don't understand %x \n"), looking_for
);
404 /* Fell of the end. */
405 fprintf (stream
, "%02x %02x .word\tH'%x,H'%x",
412 print_insn_h8300 (addr
, info
)
414 disassemble_info
*info
;
416 return bfd_h8_disassemble (addr
, info
, 0);
420 print_insn_h8300h (addr
, info
)
422 disassemble_info
*info
;
424 return bfd_h8_disassemble (addr
, info
, 1);
428 print_insn_h8300s (addr
, info
)
430 disassemble_info
*info
;
432 return bfd_h8_disassemble (addr
, info
, 2);
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