1 /* Disassemble z8000 code.
2 Copyright 1992, 1993, 1995, 1998 Free Software Foundation, Inc.
4 This file is part of GNU Binutils.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
32 /* These are all indexed by nibble number (i.e only every other entry
33 of bytes is used, and every 4th entry of words). */
34 unsigned char nibbles[24];
35 unsigned char bytes[24];
36 unsigned short words[24];
38 /* Nibble number of first word not yet fetched. */
44 char instr_asmsrc[80];
45 unsigned long arg_reg[0x0f];
46 unsigned long immediate;
47 unsigned long displacement;
48 unsigned long address;
49 unsigned long cond_code;
50 unsigned long ctrl_code;
52 unsigned long interrupts;
56 /* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive)
57 to ADDR (exclusive) are valid. Returns 1 for success, longjmps
59 #define FETCH_DATA(info, nibble) \
60 ((nibble) < ((instr_data_s *)(info->private_data))->max_fetched \
61 ? 1 : fetch_data ((info), (nibble)))
64 fetch_data (info, nibble)
65 struct disassemble_info *info;
68 unsigned char mybuf[20];
70 instr_data_s *priv = (instr_data_s *)info->private_data;
72 if ((nibble % 4) != 0)
75 status = (*info->read_memory_func) (priv->insn_start,
81 (*info->memory_error_func) (status, priv->insn_start, info);
82 longjmp (priv->bailout, 1);
87 unsigned char *p = mybuf ;
89 for (i = 0; i < nibble;)
91 priv->words[i] = (p[0] << 8) | p[1];
94 priv->nibbles[i++] = *p >> 4;
95 priv->nibbles[i++] = *p &0xf;
99 priv->nibbles[i++] = *p >> 4;
100 priv->nibbles[i++] = *p & 0xf;
105 priv->max_fetched = nibble;
109 static char *codes[16] =
129 int z8k_lookup_instr PARAMS ((unsigned char*, disassemble_info *));
130 static void output_instr
131 PARAMS ((instr_data_s *, unsigned long, disassemble_info *));
132 static void unpack_instr PARAMS ((instr_data_s *, int, disassemble_info *));
133 static void unparse_instr PARAMS ((instr_data_s *));
136 print_insn_z8k (addr, info, is_segmented)
138 disassemble_info *info;
141 instr_data_s instr_data;
143 info->private_data = (PTR) &instr_data;
144 instr_data.max_fetched = 0;
145 instr_data.insn_start = addr;
146 if (setjmp (instr_data.bailout) != 0)
150 instr_data.tabl_index = z8k_lookup_instr (instr_data.nibbles, info);
151 if (instr_data.tabl_index > 0)
153 unpack_instr (&instr_data, is_segmented, info);
154 unparse_instr (&instr_data);
155 output_instr (&instr_data, addr, info);
156 return z8k_table[instr_data.tabl_index].length;
160 FETCH_DATA (info, 4);
161 (*info->fprintf_func) (info->stream, ".word %02x%02x",
162 instr_data.bytes[0], instr_data.bytes[2]);
168 print_insn_z8001 (addr, info)
170 disassemble_info *info;
172 return print_insn_z8k (addr, info, 1);
176 print_insn_z8002 (addr, info)
178 disassemble_info *info;
180 return print_insn_z8k (addr, info, 0);
184 z8k_lookup_instr (nibbles, info)
185 unsigned char *nibbles;
186 disassemble_info *info;
189 int nibl_index, tabl_index;
191 unsigned short instr_nibl;
192 unsigned short tabl_datum, datum_class, datum_value;
196 while (!nibl_matched && z8k_table[tabl_index].name)
199 for (nibl_index = 0; nibl_index < z8k_table[tabl_index].length * 2 && nibl_matched; nibl_index++)
201 if ((nibl_index % 4) == 0)
202 /* Fetch one word at a time. */
203 FETCH_DATA (info, nibl_index + 4);
204 instr_nibl = nibbles[nibl_index];
206 tabl_datum = z8k_table[tabl_index].byte_info[nibl_index];
207 datum_class = tabl_datum & CLASS_MASK;
208 datum_value = ~CLASS_MASK & tabl_datum;
213 if (datum_value != instr_nibl)
217 if (!((~instr_nibl) & 0x4))
221 if (!(instr_nibl & 0x4))
225 if (!((~instr_nibl) & 0x8))
229 if (!(instr_nibl & 0x8))
233 if (!((~instr_nibl) & 0x8))
238 if (!(instr_nibl & 0x8))
247 if ((instr_nibl | 0x2) != (datum_value | 0x2))
266 output_instr (instr_data, addr, info)
267 instr_data_s *instr_data;
269 disassemble_info *info;
271 int loop, loop_limit;
275 strcpy (out_str, "\t");
277 loop_limit = z8k_table[instr_data->tabl_index].length * 2;
278 FETCH_DATA (info, loop_limit);
279 for (loop = 0; loop < loop_limit; loop++)
281 sprintf (tmp_str, "%x", instr_data->nibbles[loop]);
282 strcat (out_str, tmp_str);
287 strcat (out_str, " ");
290 strcat (out_str, instr_data->instr_asmsrc);
292 (*info->fprintf_func) (info->stream, "%s", out_str);
296 unpack_instr (instr_data, is_segmented, info)
297 instr_data_s *instr_data;
299 disassemble_info *info;
301 int nibl_count, loop;
302 unsigned short instr_nibl, instr_byte, instr_word;
304 unsigned short tabl_datum, datum_class, datum_value;
308 while (z8k_table[instr_data->tabl_index].byte_info[loop] != 0)
310 FETCH_DATA (info, nibl_count + 4 - (nibl_count % 4));
311 instr_nibl = instr_data->nibbles[nibl_count];
312 instr_byte = instr_data->bytes[nibl_count];
313 instr_word = instr_data->words[nibl_count];
315 tabl_datum = z8k_table[instr_data->tabl_index].byte_info[loop];
316 datum_class = tabl_datum & CLASS_MASK;
317 datum_value = tabl_datum & ~CLASS_MASK;
322 instr_data->address = instr_nibl;
325 instr_data->displacement = instr_nibl;
328 instr_data->arg_reg[datum_value] = instr_nibl;
334 instr_data->displacement = instr_word;
338 instr_data->displacement = instr_word & 0x0fff;
349 instr_data->immediate = instr_nibl;
352 instr_data->immediate = (-instr_byte);
356 instr_data->immediate = instr_byte;
360 instr_data->immediate = instr_word;
364 FETCH_DATA (info, nibl_count + 8);
365 instr_long = (instr_data->words[nibl_count] << 16)
366 | (instr_data->words[nibl_count + 4]);
367 instr_data->immediate = instr_long;
371 instr_data->immediate = instr_nibl - 1;
374 instr_data->immediate = instr_nibl + 1;
377 instr_data->immediate = 1;
380 instr_data->immediate = 2;
383 instr_data->immediate = instr_nibl & 0x3;
390 instr_data->cond_code = instr_nibl;
393 instr_data->ctrl_code = instr_nibl;
399 if (instr_nibl & 0x8)
401 FETCH_DATA (info, nibl_count + 8);
402 instr_long = (instr_data->words[nibl_count] << 16)
403 | (instr_data->words[nibl_count + 4]);
404 instr_data->address = ((instr_word & 0x7f00) << 8) +
405 (instr_long & 0xffff);
410 instr_data->address = ((instr_word & 0x7f00) << 8) +
411 (instr_word & 0x00ff);
417 instr_data->address = instr_word;
422 instr_data->cond_code = instr_nibl & 0x7;
425 instr_data->cond_code = instr_nibl & 0x7;
428 instr_data->displacement = instr_byte & 0x7f;
432 instr_data->displacement = instr_byte & 0x7f;
436 instr_data->interrupts = instr_nibl & 0x3;
439 instr_data->interrupts = instr_nibl & 0x3;
445 instr_data->arg_reg[datum_value] = instr_nibl;
448 instr_data->flags = instr_nibl;
451 instr_data->arg_reg[datum_value] = instr_nibl;
454 instr_data->arg_reg[datum_value] = instr_nibl;
457 instr_data->arg_reg[datum_value] = instr_nibl;
460 instr_data->arg_reg[datum_value] = instr_nibl;
463 instr_data->arg_reg[datum_value] = instr_nibl;
466 instr_data->arg_reg[datum_value] = instr_nibl;
478 unparse_instr (instr_data)
479 instr_data_s *instr_data;
481 unsigned short tabl_datum, datum_class, datum_value;
482 int loop, loop_limit;
483 char out_str[80], tmp_str[25];
485 sprintf (out_str, "\t%s\t", z8k_table[instr_data->tabl_index].name);
487 loop_limit = z8k_table[instr_data->tabl_index].noperands;
488 for (loop = 0; loop < loop_limit; loop++)
491 strcat (out_str, ",");
493 tabl_datum = z8k_table[instr_data->tabl_index].arg_info[loop];
494 datum_class = tabl_datum & CLASS_MASK;
495 datum_value = tabl_datum & ~CLASS_MASK;
500 sprintf (tmp_str, "0x%0lx(R%ld)", instr_data->address,
501 instr_data->arg_reg[datum_value]);
502 strcat (out_str, tmp_str);
505 sprintf (tmp_str, "r%ld(#%lx)", instr_data->arg_reg[datum_value],
506 instr_data->immediate);
507 strcat (out_str, tmp_str);
510 sprintf (tmp_str, "r%ld(R%ld)", instr_data->arg_reg[datum_value],
511 instr_data->arg_reg[ARG_RX]);
512 strcat (out_str, tmp_str);
515 sprintf (tmp_str, "#0x%0lx", instr_data->displacement);
516 strcat (out_str, tmp_str);
519 sprintf (tmp_str, "#0x%0lx", instr_data->immediate);
520 strcat (out_str, tmp_str);
523 sprintf (tmp_str, "%s", codes[instr_data->cond_code]);
524 strcat (out_str, tmp_str);
527 sprintf (tmp_str, "0x%0lx", instr_data->ctrl_code);
528 strcat (out_str, tmp_str);
532 sprintf (tmp_str, "#0x%0lx", instr_data->address);
533 strcat (out_str, tmp_str);
536 sprintf (tmp_str, "@R%ld", instr_data->arg_reg[datum_value]);
537 strcat (out_str, tmp_str);
540 sprintf (tmp_str, "0x%0lx", instr_data->flags);
541 strcat (out_str, tmp_str);
544 if (instr_data->arg_reg[datum_value] >= 0x8)
546 sprintf (tmp_str, "rl%ld",
547 instr_data->arg_reg[datum_value] - 0x8);
551 sprintf (tmp_str, "rh%ld", instr_data->arg_reg[datum_value]);
553 strcat (out_str, tmp_str);
556 sprintf (tmp_str, "r%ld", instr_data->arg_reg[datum_value]);
557 strcat (out_str, tmp_str);
560 sprintf (tmp_str, "rq%ld", instr_data->arg_reg[datum_value]);
561 strcat (out_str, tmp_str);
564 sprintf (tmp_str, "rr%ld", instr_data->arg_reg[datum_value]);
565 strcat (out_str, tmp_str);
572 strcpy (instr_data->instr_asmsrc, out_str);