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[binutils.git] / opcodes / h8300-dis.c
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1 /* Disassemble h8300 instructions.
2 Copyright 1993, 1994, 1996, 1998, 2000, 2001, 2002, 2003, 2004, 2005, 2006
3 Free Software Foundation, Inc.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
18 MA 02110-1301, USA. */
20 #define DEFINE_TABLE
22 #include "sysdep.h"
23 #define h8_opcodes h8ops
24 #include "opcode/h8300.h"
25 #include "dis-asm.h"
26 #include "opintl.h"
27 #include "libiberty.h"
29 struct h8_instruction
31 int length;
32 const struct h8_opcode *opcode;
35 struct h8_instruction *h8_instructions;
37 /* Run through the opcodes and sort them into order to make them easy
38 to disassemble. */
40 static void
41 bfd_h8_disassemble_init (void)
43 unsigned int i;
44 unsigned int nopcodes;
45 const struct h8_opcode *p;
46 struct h8_instruction *pi;
48 nopcodes = sizeof (h8_opcodes) / sizeof (struct h8_opcode);
50 h8_instructions = xmalloc (nopcodes * sizeof (struct h8_instruction));
52 for (p = h8_opcodes, pi = h8_instructions; p->name; p++, pi++)
54 int n1 = 0;
55 int n2 = 0;
57 if ((int) p->data.nib[0] < 16)
58 n1 = (int) p->data.nib[0];
59 else
60 n1 = 0;
62 if ((int) p->data.nib[1] < 16)
63 n2 = (int) p->data.nib[1];
64 else
65 n2 = 0;
67 /* Just make sure there are an even number of nibbles in it, and
68 that the count is the same as the length. */
69 for (i = 0; p->data.nib[i] != (op_type) E; i++)
72 if (i & 1)
74 fprintf (stderr, "Internal error, h8_disassemble_init.\n");
75 abort ();
78 pi->length = i / 2;
79 pi->opcode = p;
82 /* Add entry for the NULL vector terminator. */
83 pi->length = 0;
84 pi->opcode = p;
87 static void
88 extract_immediate (FILE *stream,
89 op_type looking_for,
90 int thisnib,
91 unsigned char *data,
92 int *cst,
93 int *len,
94 const struct h8_opcode *q)
96 switch (looking_for & SIZE)
98 case L_2:
99 *len = 2;
100 *cst = thisnib & 3;
102 /* DISP2 special treatment. */
103 if ((looking_for & MODE) == DISP)
105 if (OP_KIND (q->how) == O_MOVAB
106 || OP_KIND (q->how) == O_MOVAW
107 || OP_KIND (q->how) == O_MOVAL)
109 /* Handling for mova insn. */
110 switch (q->args.nib[0] & MODE)
112 case INDEXB:
113 default:
114 break;
115 case INDEXW:
116 *cst *= 2;
117 break;
118 case INDEXL:
119 *cst *= 4;
120 break;
123 else
125 /* Handling for non-mova insn. */
126 switch (OP_SIZE (q->how))
128 default: break;
129 case SW:
130 *cst *= 2;
131 break;
132 case SL:
133 *cst *= 4;
134 break;
138 break;
139 case L_8:
140 *len = 8;
141 *cst = data[0];
142 break;
143 case L_16:
144 case L_16U:
145 *len = 16;
146 *cst = (data[0] << 8) + data [1];
147 #if 0
148 if ((looking_for & SIZE) == L_16)
149 *cst = (short) *cst; /* Sign extend. */
150 #endif
151 break;
152 case L_32:
153 *len = 32;
154 *cst = (data[0] << 24) + (data[1] << 16) + (data[2] << 8) + data[3];
155 break;
156 default:
157 *len = 0;
158 *cst = 0;
159 fprintf (stream, "DISP bad size\n");
160 break;
164 static const char *regnames[] =
166 "r0h", "r1h", "r2h", "r3h", "r4h", "r5h", "r6h", "r7h",
167 "r0l", "r1l", "r2l", "r3l", "r4l", "r5l", "r6l", "r7l"
169 static const char *wregnames[] =
171 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
172 "e0", "e1", "e2", "e3", "e4", "e5", "e6", "e7"
174 static const char *lregnames[] =
176 "er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7",
177 "er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7"
179 static const char *cregnames[] =
181 "ccr", "exr", "mach", "macl", "", "", "vbr", "sbr"
184 static void
185 print_one_arg (disassemble_info *info,
186 bfd_vma addr,
187 op_type x,
188 int cst,
189 int cstlen,
190 int rdisp_n,
191 int rn,
192 const char **pregnames,
193 int len)
195 void * stream = info->stream;
196 fprintf_ftype outfn = info->fprintf_func;
198 if ((x & SIZE) == L_3 || (x & SIZE) == L_3NZ)
199 outfn (stream, "#0x%x", (unsigned) cst);
200 else if ((x & MODE) == IMM)
201 outfn (stream, "#0x%x", (unsigned) cst);
202 else if ((x & MODE) == DBIT || (x & MODE) == KBIT)
203 outfn (stream, "#%d", (unsigned) cst);
204 else if ((x & MODE) == CONST_2)
205 outfn (stream, "#2");
206 else if ((x & MODE) == CONST_4)
207 outfn (stream, "#4");
208 else if ((x & MODE) == CONST_8)
209 outfn (stream, "#8");
210 else if ((x & MODE) == CONST_16)
211 outfn (stream, "#16");
212 else if ((x & MODE) == REG)
214 switch (x & SIZE)
216 case L_8:
217 outfn (stream, "%s", regnames[rn]);
218 break;
219 case L_16:
220 case L_16U:
221 outfn (stream, "%s", wregnames[rn]);
222 break;
223 case L_P:
224 case L_32:
225 outfn (stream, "%s", lregnames[rn]);
226 break;
229 else if ((x & MODE) == LOWREG)
231 switch (x & SIZE)
233 case L_8:
234 /* Always take low half of reg. */
235 outfn (stream, "%s.b", regnames[rn < 8 ? rn + 8 : rn]);
236 break;
237 case L_16:
238 case L_16U:
239 /* Always take low half of reg. */
240 outfn (stream, "%s.w", wregnames[rn < 8 ? rn : rn - 8]);
241 break;
242 case L_P:
243 case L_32:
244 outfn (stream, "%s.l", lregnames[rn]);
245 break;
248 else if ((x & MODE) == POSTINC)
249 outfn (stream, "@%s+", pregnames[rn]);
251 else if ((x & MODE) == POSTDEC)
252 outfn (stream, "@%s-", pregnames[rn]);
254 else if ((x & MODE) == PREINC)
255 outfn (stream, "@+%s", pregnames[rn]);
257 else if ((x & MODE) == PREDEC)
258 outfn (stream, "@-%s", pregnames[rn]);
260 else if ((x & MODE) == IND)
261 outfn (stream, "@%s", pregnames[rn]);
263 else if ((x & MODE) == ABS || (x & ABSJMP))
264 outfn (stream, "@0x%x:%d", (unsigned) cst, cstlen);
266 else if ((x & MODE) == MEMIND)
267 outfn (stream, "@@%d (0x%x)", cst, cst);
269 else if ((x & MODE) == VECIND)
271 /* FIXME Multiplier should be 2 or 4, depending on processor mode,
272 by which is meant "normal" vs. "middle", "advanced", "maximum". */
274 int offset = (cst + 0x80) * 4;
275 outfn (stream, "@@%d (0x%x)", offset, offset);
277 else if ((x & MODE) == PCREL)
279 if ((x & SIZE) == L_16 ||
280 (x & SIZE) == L_16U)
282 outfn (stream, ".%s%d (0x%lx)",
283 (short) cst > 0 ? "+" : "",
284 (short) cst,
285 (long)(addr + (short) cst + len));
287 else
289 outfn (stream, ".%s%d (0x%lx)",
290 (char) cst > 0 ? "+" : "",
291 (char) cst,
292 (long)(addr + (char) cst + len));
295 else if ((x & MODE) == DISP)
296 outfn (stream, "@(0x%x:%d,%s)", cst, cstlen, pregnames[rdisp_n]);
298 else if ((x & MODE) == INDEXB)
299 /* Always take low half of reg. */
300 outfn (stream, "@(0x%x:%d,%s.b)", cst, cstlen,
301 regnames[rdisp_n < 8 ? rdisp_n + 8 : rdisp_n]);
303 else if ((x & MODE) == INDEXW)
304 /* Always take low half of reg. */
305 outfn (stream, "@(0x%x:%d,%s.w)", cst, cstlen,
306 wregnames[rdisp_n < 8 ? rdisp_n : rdisp_n - 8]);
308 else if ((x & MODE) == INDEXL)
309 outfn (stream, "@(0x%x:%d,%s.l)", cst, cstlen, lregnames[rdisp_n]);
311 else if (x & CTRL)
312 outfn (stream, cregnames[rn]);
314 else if ((x & MODE) == CCR)
315 outfn (stream, "ccr");
317 else if ((x & MODE) == EXR)
318 outfn (stream, "exr");
320 else if ((x & MODE) == MACREG)
321 outfn (stream, "mac%c", cst ? 'l' : 'h');
323 else
324 /* xgettext:c-format */
325 outfn (stream, _("Hmmmm 0x%x"), x);
328 static unsigned int
329 bfd_h8_disassemble (bfd_vma addr, disassemble_info *info, int mach)
331 /* Find the first entry in the table for this opcode. */
332 int regno[3] = { 0, 0, 0 };
333 int dispregno[3] = { 0, 0, 0 };
334 int cst[3] = { 0, 0, 0 };
335 int cstlen[3] = { 0, 0, 0 };
336 static bfd_boolean init = 0;
337 const struct h8_instruction *qi;
338 char const **pregnames = mach != 0 ? lregnames : wregnames;
339 int status;
340 unsigned int l;
341 unsigned char data[MAX_CODE_NIBBLES];
342 void *stream = info->stream;
343 fprintf_ftype outfn = info->fprintf_func;
345 if (!init)
347 bfd_h8_disassemble_init ();
348 init = 1;
351 status = info->read_memory_func (addr, data, 2, info);
352 if (status != 0)
354 info->memory_error_func (status, addr, info);
355 return -1;
358 for (l = 2; status == 0 && l < sizeof (data) / 2; l += 2)
359 status = info->read_memory_func (addr + l, data + l, 2, info);
361 /* Find the exact opcode/arg combo. */
362 for (qi = h8_instructions; qi->opcode->name; qi++)
364 const struct h8_opcode *q = qi->opcode;
365 const op_type *nib = q->data.nib;
366 unsigned int len = 0;
368 while (1)
370 op_type looking_for = *nib;
371 int thisnib = data[len / 2];
372 int opnr;
374 thisnib = (len & 1) ? (thisnib & 0xf) : ((thisnib / 16) & 0xf);
375 opnr = ((looking_for & OP3) == OP3 ? 2
376 : (looking_for & DST) == DST ? 1 : 0);
378 if (looking_for < 16 && looking_for >= 0)
380 if (looking_for != thisnib)
381 goto fail;
383 else
385 if ((int) looking_for & (int) B31)
387 if (!((thisnib & 0x8) != 0))
388 goto fail;
390 looking_for = (op_type) ((int) looking_for & ~(int) B31);
391 thisnib &= 0x7;
393 else if ((int) looking_for & (int) B30)
395 if (!((thisnib & 0x8) == 0))
396 goto fail;
398 looking_for = (op_type) ((int) looking_for & ~(int) B30);
401 if ((int) looking_for & (int) B21)
403 if (!((thisnib & 0x4) != 0))
404 goto fail;
406 looking_for = (op_type) ((int) looking_for & ~(int) B21);
407 thisnib &= 0xb;
409 else if ((int) looking_for & (int) B20)
411 if (!((thisnib & 0x4) == 0))
412 goto fail;
414 looking_for = (op_type) ((int) looking_for & ~(int) B20);
416 if ((int) looking_for & (int) B11)
418 if (!((thisnib & 0x2) != 0))
419 goto fail;
421 looking_for = (op_type) ((int) looking_for & ~(int) B11);
422 thisnib &= 0xd;
424 else if ((int) looking_for & (int) B10)
426 if (!((thisnib & 0x2) == 0))
427 goto fail;
429 looking_for = (op_type) ((int) looking_for & ~(int) B10);
432 if ((int) looking_for & (int) B01)
434 if (!((thisnib & 0x1) != 0))
435 goto fail;
437 looking_for = (op_type) ((int) looking_for & ~(int) B01);
438 thisnib &= 0xe;
440 else if ((int) looking_for & (int) B00)
442 if (!((thisnib & 0x1) == 0))
443 goto fail;
445 looking_for = (op_type) ((int) looking_for & ~(int) B00);
448 if (looking_for & IGNORE)
450 /* Hitachi has declared that IGNORE must be zero. */
451 if (thisnib != 0)
452 goto fail;
454 else if ((looking_for & MODE) == DATA)
456 ; /* Skip embedded data. */
458 else if ((looking_for & MODE) == DBIT)
460 /* Exclude adds/subs by looking at bit 0 and 2, and
461 make sure the operand size, either w or l,
462 matches by looking at bit 1. */
463 if ((looking_for & 7) != (thisnib & 7))
464 goto fail;
466 cst[opnr] = (thisnib & 0x8) ? 2 : 1;
468 else if ((looking_for & MODE) == DISP
469 || (looking_for & MODE) == ABS
470 || (looking_for & MODE) == PCREL
471 || (looking_for & MODE) == INDEXB
472 || (looking_for & MODE) == INDEXW
473 || (looking_for & MODE) == INDEXL)
475 extract_immediate (stream, looking_for, thisnib,
476 data + len / 2, cst + opnr,
477 cstlen + opnr, q);
478 /* Even address == bra, odd == bra/s. */
479 if (q->how == O (O_BRAS, SB))
480 cst[opnr] -= 1;
482 else if ((looking_for & MODE) == REG
483 || (looking_for & MODE) == LOWREG
484 || (looking_for & MODE) == IND
485 || (looking_for & MODE) == PREINC
486 || (looking_for & MODE) == POSTINC
487 || (looking_for & MODE) == PREDEC
488 || (looking_for & MODE) == POSTDEC)
490 regno[opnr] = thisnib;
492 else if (looking_for & CTRL) /* Control Register. */
494 thisnib &= 7;
495 if (((looking_for & MODE) == CCR && (thisnib != C_CCR))
496 || ((looking_for & MODE) == EXR && (thisnib != C_EXR))
497 || ((looking_for & MODE) == MACH && (thisnib != C_MACH))
498 || ((looking_for & MODE) == MACL && (thisnib != C_MACL))
499 || ((looking_for & MODE) == VBR && (thisnib != C_VBR))
500 || ((looking_for & MODE) == SBR && (thisnib != C_SBR)))
501 goto fail;
502 if (((looking_for & MODE) == CCR_EXR
503 && (thisnib != C_CCR && thisnib != C_EXR))
504 || ((looking_for & MODE) == VBR_SBR
505 && (thisnib != C_VBR && thisnib != C_SBR))
506 || ((looking_for & MODE) == MACREG
507 && (thisnib != C_MACH && thisnib != C_MACL)))
508 goto fail;
509 if (((looking_for & MODE) == CC_EX_VB_SB
510 && (thisnib != C_CCR && thisnib != C_EXR
511 && thisnib != C_VBR && thisnib != C_SBR)))
512 goto fail;
514 regno[opnr] = thisnib;
516 else if ((looking_for & SIZE) == L_5)
518 cst[opnr] = data[len / 2] & 31;
519 cstlen[opnr] = 5;
521 else if ((looking_for & SIZE) == L_4)
523 cst[opnr] = thisnib;
524 cstlen[opnr] = 4;
526 else if ((looking_for & SIZE) == L_16
527 || (looking_for & SIZE) == L_16U)
529 cst[opnr] = (data[len / 2]) * 256 + data[(len + 2) / 2];
530 cstlen[opnr] = 16;
532 else if ((looking_for & MODE) == MEMIND)
534 cst[opnr] = data[1];
536 else if ((looking_for & MODE) == VECIND)
538 cst[opnr] = data[1] & 0x7f;
540 else if ((looking_for & SIZE) == L_32)
542 int i = len / 2;
544 cst[opnr] = ((data[i] << 24)
545 | (data[i + 1] << 16)
546 | (data[i + 2] << 8)
547 | (data[i + 3]));
549 cstlen[opnr] = 32;
551 else if ((looking_for & SIZE) == L_24)
553 int i = len / 2;
555 cst[opnr] =
556 (data[i] << 16) | (data[i + 1] << 8) | (data[i + 2]);
557 cstlen[opnr] = 24;
559 else if (looking_for & IGNORE)
563 else if (looking_for & DISPREG)
565 dispregno[opnr] = thisnib & 7;
567 else if ((looking_for & MODE) == KBIT)
569 switch (thisnib)
571 case 9:
572 cst[opnr] = 4;
573 break;
574 case 8:
575 cst[opnr] = 2;
576 break;
577 case 0:
578 cst[opnr] = 1;
579 break;
580 default:
581 goto fail;
584 else if ((looking_for & SIZE) == L_8)
586 cstlen[opnr] = 8;
587 cst[opnr] = data[len / 2];
589 else if ((looking_for & SIZE) == L_3
590 || (looking_for & SIZE) == L_3NZ)
592 cst[opnr] = thisnib & 0x7;
593 if (cst[opnr] == 0 && (looking_for & SIZE) == L_3NZ)
594 goto fail;
596 else if ((looking_for & SIZE) == L_2)
598 cstlen[opnr] = 2;
599 cst[opnr] = thisnib & 0x3;
601 else if ((looking_for & MODE) == MACREG)
603 cst[opnr] = (thisnib == 3);
605 else if (looking_for == (op_type) E)
607 outfn (stream, "%s\t", q->name);
609 /* Gross. Disgusting. */
610 if (strcmp (q->name, "ldm.l") == 0)
612 int count, high;
614 count = (data[1] / 16) & 0x3;
615 high = regno[1];
617 outfn (stream, "@sp+,er%d-er%d", high - count, high);
618 return qi->length;
621 if (strcmp (q->name, "stm.l") == 0)
623 int count, low;
625 count = (data[1] / 16) & 0x3;
626 low = regno[0];
628 outfn (stream, "er%d-er%d,@-sp", low, low + count);
629 return qi->length;
631 if (strcmp (q->name, "rte/l") == 0
632 || strcmp (q->name, "rts/l") == 0)
634 if (regno[0] == 0)
635 outfn (stream, "er%d", regno[1]);
636 else
637 outfn (stream, "er%d-er%d", regno[1] - regno[0],
638 regno[1]);
639 return qi->length;
641 if (CONST_STRNEQ (q->name, "mova"))
643 const op_type *args = q->args.nib;
645 if (args[1] == (op_type) E)
647 /* Short form. */
648 print_one_arg (info, addr, args[0], cst[0],
649 cstlen[0], dispregno[0], regno[0],
650 pregnames, qi->length);
651 outfn (stream, ",er%d", dispregno[0]);
653 else
655 outfn (stream, "@(0x%x:%d,", cst[0], cstlen[0]);
656 print_one_arg (info, addr, args[1], cst[1],
657 cstlen[1], dispregno[1], regno[1],
658 pregnames, qi->length);
659 outfn (stream, ".%c),",
660 (args[0] & MODE) == INDEXB ? 'b' : 'w');
661 print_one_arg (info, addr, args[2], cst[2],
662 cstlen[2], dispregno[2], regno[2],
663 pregnames, qi->length);
665 return qi->length;
667 /* Fill in the args. */
669 const op_type *args = q->args.nib;
670 int hadone = 0;
671 int nargs;
673 /* Special case handling for the adds and subs instructions
674 since in H8 mode thay can only take the r0-r7 registers
675 but in other (higher) modes they can take the er0-er7
676 registers as well. */
677 if (strcmp (qi->opcode->name, "adds") == 0
678 || strcmp (qi->opcode->name, "subs") == 0)
680 outfn (stream, "#%d,%s", cst[0], pregnames[regno[1] & 0x7]);
681 return qi->length;
684 for (nargs = 0;
685 nargs < 3 && args[nargs] != (op_type) E;
686 nargs++)
688 int x = args[nargs];
690 if (hadone)
691 outfn (stream, ",");
693 print_one_arg (info, addr, x,
694 cst[nargs], cstlen[nargs],
695 dispregno[nargs], regno[nargs],
696 pregnames, qi->length);
698 hadone = 1;
702 return qi->length;
704 else
705 /* xgettext:c-format */
706 outfn (stream, _("Don't understand 0x%x \n"), looking_for);
709 len++;
710 nib++;
713 fail:
717 /* Fell off the end. */
718 outfn (stream, ".word\tH'%x,H'%x", data[0], data[1]);
719 return 2;
723 print_insn_h8300 (bfd_vma addr, disassemble_info *info)
725 return bfd_h8_disassemble (addr, info, 0);
729 print_insn_h8300h (bfd_vma addr, disassemble_info *info)
731 return bfd_h8_disassemble (addr, info, 1);
735 print_insn_h8300s (bfd_vma addr, disassemble_info *info)
737 return bfd_h8_disassemble (addr, info, 2);