1 /* Disassemble h8300 instructions.
2 Copyright 1993, 1994, 1996, 1998, 2000, 2001 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"
26 static void bfd_h8_disassemble_init
PARAMS ((void));
27 static unsigned int bfd_h8_disassemble
28 PARAMS ((bfd_vma
, disassemble_info
*, int));
30 /* Run through the opcodes and sort them into order to make them easy
33 bfd_h8_disassemble_init ()
38 for (p
= h8_opcodes
; p
->name
; p
++)
43 if ((int) p
->data
.nib
[0] < 16)
44 n1
= (int) p
->data
.nib
[0];
48 if ((int) p
->data
.nib
[1] < 16)
49 n2
= (int) p
->data
.nib
[1];
53 /* Just make sure there are an even number of nibbles in it, and
54 that the count is the same as the length. */
55 for (i
= 0; p
->data
.nib
[i
] != E
; i
++)
66 bfd_h8_disassemble (addr
, info
, mode
)
68 disassemble_info
*info
;
71 /* Find the first entry in the table for this opcode. */
72 static CONST
char *regnames
[] =
74 "r0h", "r1h", "r2h", "r3h", "r4h", "r5h", "r6h", "r7h",
75 "r0l", "r1l", "r2l", "r3l", "r4l", "r5l", "r6l", "r7l"
77 static CONST
char *wregnames
[] =
79 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
80 "e0", "e1", "e2", "e3", "e4", "e5", "e6", "e7"
82 static CONST
char *lregnames
[] =
84 "er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7",
85 "er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7"
93 static boolean init
= 0;
95 char CONST
**pregnames
= mode
!= 0 ? lregnames
: wregnames
;
98 unsigned char data
[20];
99 void *stream
= info
->stream
;
100 fprintf_ftype fprintf
= info
->fprintf_func
;
104 bfd_h8_disassemble_init ();
108 status
= info
->read_memory_func (addr
, data
, 2, info
);
111 info
->memory_error_func (status
, addr
, info
);
115 for (l
= 2; status
== 0 && l
< 10; l
+= 2)
116 status
= info
->read_memory_func (addr
+ l
, data
+ l
, 2, info
);
118 /* Find the exact opcode/arg combo. */
119 for (q
= h8_opcodes
; q
->name
; q
++)
121 op_type
*nib
= q
->data
.nib
;
122 unsigned int len
= 0;
126 op_type looking_for
= *nib
;
127 int thisnib
= data
[len
>> 1];
129 thisnib
= (len
& 1) ? (thisnib
& 0xf) : ((thisnib
>> 4) & 0xf);
131 if (looking_for
< 16 && looking_for
>= 0)
133 if (looking_for
!= thisnib
)
138 if ((int) looking_for
& (int) B31
)
140 if (!(((int) thisnib
& 0x8) != 0))
143 looking_for
= (op_type
) ((int) looking_for
& ~(int) B31
);
146 if ((int) looking_for
& (int) B30
)
148 if (!(((int) thisnib
& 0x8) == 0))
151 looking_for
= (op_type
) ((int) looking_for
& ~(int) B30
);
154 if (looking_for
& DBIT
)
156 /* Exclude adds/subs by looking at bit 0 and 2, and
157 make sure the operand size, either w or l,
158 matches by looking at bit 1. */
159 if ((looking_for
& 7) != (thisnib
& 7))
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
)
178 abs
= (data
[1] << 16) | (data
[2] << 8) | (data
[3]);
180 else if (looking_for
& MEMIND
)
184 else if (looking_for
& L_32
)
188 abs
= (data
[i
] << 24)
189 | (data
[i
+ 1] << 16)
195 else if (looking_for
& L_24
)
199 abs
= (data
[i
] << 16) | (data
[i
+ 1] << 8) | (data
[i
+ 2]);
202 else if (looking_for
& IGNORE
)
206 else if (looking_for
& DISPREG
)
210 else if (looking_for
& KBIT
)
227 else if (looking_for
& L_8
)
230 abs
= data
[len
>> 1];
232 else if (looking_for
& L_3
)
236 else if (looking_for
& L_2
)
241 else if (looking_for
& MACREG
)
243 abs
= (thisnib
== 3);
245 else if (looking_for
== E
)
249 for (i
= 0; i
< q
->length
; i
++)
250 fprintf (stream
, "%02x ", data
[i
]);
253 fprintf (stream
, " ");
255 fprintf (stream
, "%s\t", q
->name
);
257 /* Gross. Disgusting. */
258 if (strcmp (q
->name
, "ldm.l") == 0)
262 count
= (data
[1] >> 4) & 0x3;
263 high
= data
[3] & 0x7;
265 fprintf (stream
, "@sp+,er%d-er%d", high
- count
, high
);
269 if (strcmp (q
->name
, "stm.l") == 0)
273 count
= (data
[1] >> 4) & 0x3;
276 fprintf (stream
, "er%d-er%d,@-sp", low
, low
+ count
);
280 /* Fill in the args. */
282 op_type
*args
= q
->args
.nib
;
290 fprintf (stream
, ",");
294 fprintf (stream
, "#0x%x", (unsigned) bit
);
296 else if (x
& (IMM
| KBIT
| DBIT
))
298 /* Bletch. For shal #2,er0 and friends. */
299 if (*(args
+ 1) & SRC_IN_DST
)
302 fprintf (stream
, "#0x%x", (unsigned) abs
);
306 int rn
= (x
& DST
) ? rd
: rs
;
311 fprintf (stream
, "%s", regnames
[rn
]);
314 fprintf (stream
, "%s", wregnames
[rn
]);
318 fprintf (stream
, "%s", lregnames
[rn
]);
324 fprintf (stream
, "mac%c", abs
? 'l' : 'h');
328 fprintf (stream
, "@%s+", pregnames
[rs
]);
332 fprintf (stream
, "@-%s", pregnames
[rd
]);
336 int rn
= (x
& DST
) ? rd
: rs
;
337 fprintf (stream
, "@%s", pregnames
[rn
]);
339 else if (x
& ABS8MEM
)
341 fprintf (stream
, "@0x%x:8", (unsigned) abs
);
343 else if (x
& (ABS
| ABSJMP
))
345 fprintf (stream
, "@0x%x:%d", (unsigned) abs
, plen
);
349 fprintf (stream
, "@@%d (%x)", abs
, abs
);
358 (short) abs
> 0 ? "+" : "",
359 (short) abs
, addr
+ (short) abs
+ 2);
365 (char) abs
> 0 ? "+" : "",
366 (char) abs
, addr
+ (char) abs
+ 2);
371 fprintf (stream
, "@(0x%x:%d,%s)",
372 abs
, plen
, pregnames
[rdisp
]);
376 fprintf (stream
, "ccr");
380 fprintf (stream
, "exr");
383 /* xgettext:c-format */
384 fprintf (stream
, _("Hmmmm %x"), x
);
394 /* xgettext:c-format */
395 fprintf (stream
, _("Don't understand %x \n"), looking_for
);
406 /* Fell off the end. */
407 fprintf (stream
, "%02x %02x .word\tH'%x,H'%x",
414 print_insn_h8300 (addr
, info
)
416 disassemble_info
*info
;
418 return bfd_h8_disassemble (addr
, info
, 0);
422 print_insn_h8300h (addr
, info
)
424 disassemble_info
*info
;
426 return bfd_h8_disassemble (addr
, info
, 1);
430 print_insn_h8300s (addr
, info
)
432 disassemble_info
*info
;
434 return bfd_h8_disassemble (addr
, info
, 2);
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