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git.ipfire.org Git - thirdparty/binutils-gdb.git/blob - opcodes/h8300-dis.c
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)
41 n1
= (int) p
->data
.nib
[0];
45 if ((int) p
->data
.nib
[1] < 16)
46 n2
= (int) p
->data
.nib
[1];
50 /* Just make sure there are an even number of nibbles in it, and
51 that the count is the same as the length. */
52 for (i
= 0; p
->data
.nib
[i
] != E
; i
++)
64 bfd_h8_disassemble (addr
, info
, mode
)
66 disassemble_info
*info
;
69 /* Find the first entry in the table for this opcode. */
70 static CONST
char *regnames
[] =
72 "r0h", "r1h", "r2h", "r3h", "r4h", "r5h", "r6h", "r7h",
73 "r0l", "r1l", "r2l", "r3l", "r4l", "r5l", "r6l", "r7l"
75 static CONST
char *wregnames
[] =
77 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
78 "e0", "e1", "e2", "e3", "e4", "e5", "e6", "e7"
80 static CONST
char *lregnames
[] =
82 "er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7",
83 "er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7"
91 static boolean init
= 0;
92 struct h8_opcode
*q
= h8_opcodes
;
93 char CONST
**pregnames
= mode
!= 0 ? lregnames
: wregnames
;
96 unsigned char data
[20];
97 void *stream
= info
->stream
;
98 fprintf_ftype fprintf
= info
->fprintf_func
;
102 bfd_h8_disassemble_init ();
106 status
= info
->read_memory_func (addr
, data
, 2, info
);
109 info
->memory_error_func (status
, addr
, info
);
113 for (l
= 2; status
== 0 && l
< 10; l
+= 2)
114 status
= info
->read_memory_func (addr
+ l
, data
+l
, 2, info
);
116 /* Find the exact opcode/arg combo. */
120 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 if ((looking_for
& 2) != (thisnib
& 2))
159 abs
= (thisnib
& 0x8) ? 2 : 1;
161 else if (looking_for
& (REG
| IND
| INC
| DEC
))
163 if (looking_for
& SRC
)
168 else if (looking_for
& L_16
)
170 abs
= (data
[len
>> 1]) * 256 + data
[(len
+ 2) >> 1];
173 else if (looking_for
& ABSJMP
)
175 abs
= (data
[1] << 16) | (data
[2] << 8) | (data
[3]);
177 else if (looking_for
& MEMIND
)
181 else if (looking_for
& L_32
)
185 abs
= (data
[i
] << 24)
186 | (data
[i
+ 1] << 16)
192 else if (looking_for
& L_24
)
196 abs
= (data
[i
] << 16) | (data
[i
+ 1] << 8) | (data
[i
+ 2]);
199 else if (looking_for
& IGNORE
)
203 else if (looking_for
& DISPREG
)
207 else if (looking_for
& KBIT
)
224 else if (looking_for
& L_8
)
227 abs
= data
[len
>> 1];
229 else if (looking_for
& L_3
)
233 else if (looking_for
& L_2
)
238 else if (looking_for
& MACREG
)
240 abs
= (thisnib
== 3);
242 else if (looking_for
== E
)
246 for (i
= 0; i
< q
->length
; i
++)
247 fprintf (stream
, "%02x ", data
[i
]);
250 fprintf (stream
, " ");
252 fprintf (stream
, "%s\t", q
->name
);
254 /* Gross. Disgusting. */
255 if (strcmp (q
->name
, "ldm.l") == 0)
259 count
= (data
[1] >> 4) & 0x3;
260 high
= data
[3] & 0x7;
262 fprintf (stream
, "@sp+,er%d-er%d", high
- count
, high
);
266 if (strcmp (q
->name
, "stm.l") == 0)
270 count
= (data
[1] >> 4) & 0x3;
273 fprintf (stream
, "er%d-er%d,@-sp", low
, low
+ count
);
277 /* Fill in the args. */
279 op_type
*args
= q
->args
.nib
;
287 fprintf (stream
, ",");
291 fprintf (stream
, "#0x%x", (unsigned) bit
);
293 else if (x
& (IMM
| KBIT
| DBIT
))
295 /* Bletch. For shal #2,er0 and friends. */
296 if (*(args
+ 1) & SRC_IN_DST
)
299 fprintf (stream
, "#0x%x", (unsigned) abs
);
303 int rn
= (x
& DST
) ? rd
: rs
;
308 fprintf (stream
, "%s", regnames
[rn
]);
311 fprintf (stream
, "%s", wregnames
[rn
]);
315 fprintf (stream
, "%s", lregnames
[rn
]);
321 fprintf (stream
, "mac%c", abs
? 'l' : 'h');
325 fprintf (stream
, "@%s+", pregnames
[rs
]);
329 fprintf (stream
, "@-%s", pregnames
[rd
]);
333 int rn
= (x
& DST
) ? rd
: rs
;
334 fprintf (stream
, "@%s", pregnames
[rn
]);
336 else if (x
& ABS8MEM
)
338 fprintf (stream
, "@0x%x:8", (unsigned) abs
);
340 else if (x
& (ABS
| ABSJMP
))
342 fprintf (stream
, "@0x%x:%d", (unsigned) abs
, plen
);
346 fprintf (stream
, "@@%d (%x)", abs
, abs
);
354 ".%s%d (%x)", (short) abs
> 0 ? "+" : "",
355 (short) abs
, addr
+ (short) abs
+ 2);
360 ".%s%d (%x)", (char) abs
> 0 ? "+" : "",
361 (char) abs
, addr
+ (char) abs
+ 2);
366 fprintf (stream
, "@(0x%x:%d,%s)",
367 abs
,plen
, pregnames
[rdisp
]);
371 fprintf (stream
, "ccr");
375 fprintf (stream
, "exr");
378 /* xgettext:c-format */
379 fprintf (stream
, _("Hmmmm %x"), x
);
389 /* xgettext:c-format */
390 fprintf (stream
, _("Don't understand %x \n"), looking_for
);
401 /* Fell off the end. */
402 fprintf (stream
, "%02x %02x .word\tH'%x,H'%x",
410 print_insn_h8300 (addr
, info
)
412 disassemble_info
*info
;
414 return bfd_h8_disassemble (addr
, info
, 0);
418 print_insn_h8300h (addr
, info
)
420 disassemble_info
*info
;
422 return bfd_h8_disassemble (addr
, info
, 1);
426 print_insn_h8300s (addr
, info
)
428 disassemble_info
*info
;
430 return bfd_h8_disassemble (addr
, info
, 2);