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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
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
19 #define DEFINE_TABLE
21 #include "sysdep.h"
22 #define h8_opcodes h8ops
23 #include "opcode/h8300.h"
24 #include "dis-asm.h"
25 #include "opintl.h"
26 #include "libiberty.h"
28 struct h8_instruction
30 int length;
31 const struct h8_opcode *opcode;
34 struct h8_instruction *h8_instructions;
36 static void bfd_h8_disassemble_init PARAMS ((void));
37 static void print_one_arg PARAMS ((disassemble_info *, bfd_vma, op_type,
38 int, int, int, int, const char **, int));
39 static unsigned int bfd_h8_disassemble PARAMS ((bfd_vma,
40 disassemble_info *,
41 int));
42 static void extract_immediate PARAMS ((FILE *,
43 op_type, int,
44 unsigned char *,
45 int *, int *,
46 const struct h8_opcode *));
48 /* Run through the opcodes and sort them into order to make them easy
49 to disassemble. */
51 static void
52 bfd_h8_disassemble_init ()
54 unsigned int i;
55 unsigned int nopcodes;
56 const struct h8_opcode *p;
57 struct h8_instruction *pi;
59 nopcodes = sizeof (h8_opcodes) / sizeof (struct h8_opcode);
61 h8_instructions = (struct h8_instruction *)
62 xmalloc (nopcodes * sizeof (struct h8_instruction));
64 for (p = h8_opcodes, pi = h8_instructions; p->name; p++, pi++)
66 int n1 = 0;
67 int n2 = 0;
69 if ((int) p->data.nib[0] < 16)
70 n1 = (int) p->data.nib[0];
71 else
72 n1 = 0;
74 if ((int) p->data.nib[1] < 16)
75 n2 = (int) p->data.nib[1];
76 else
77 n2 = 0;
79 /* Just make sure there are an even number of nibbles in it, and
80 that the count is the same as the length. */
81 for (i = 0; p->data.nib[i] != (op_type) E; i++)
84 if (i & 1)
86 fprintf (stderr, "Internal error, h8_disassemble_init.\n");
87 abort ();
90 pi->length = i / 2;
91 pi->opcode = p;
94 /* Add entry for the NULL vector terminator. */
95 pi->length = 0;
96 pi->opcode = p;
99 static void
100 extract_immediate (stream, looking_for, thisnib, data, cst, len, q)
101 FILE *stream;
102 op_type looking_for;
103 int thisnib;
104 unsigned char *data;
105 int *cst, *len;
106 const struct h8_opcode *q;
108 switch (looking_for & SIZE)
110 case L_2:
111 *len = 2;
112 *cst = thisnib & 3;
114 /* DISP2 special treatment. */
115 if ((looking_for & MODE) == DISP)
117 if (OP_KIND (q->how) == O_MOVAB ||
118 OP_KIND (q->how) == O_MOVAW ||
119 OP_KIND (q->how) == O_MOVAL)
121 /* Handling for mova insn. */
122 switch (q->args.nib[0] & MODE) {
123 case INDEXB:
124 default:
125 break;
126 case INDEXW:
127 *cst *= 2;
128 break;
129 case INDEXL:
130 *cst *= 4;
131 break;
134 else
136 /* Handling for non-mova insn. */
137 switch (OP_SIZE (q->how)) {
138 default: break;
139 case SW:
140 *cst *= 2;
141 break;
142 case SL:
143 *cst *= 4;
144 break;
148 break;
149 case L_8:
150 *len = 8;
151 *cst = data[0];
152 break;
153 case L_16:
154 case L_16U:
155 *len = 16;
156 *cst = (data[0] << 8) + data [1];
157 #if 0
158 if ((looking_for & SIZE) == L_16)
159 *cst = (short) *cst; /* sign extend */
160 #endif
161 break;
162 case L_32:
163 *len = 32;
164 *cst = (data[0] << 24) + (data[1] << 16) + (data[2] << 8) + data[3];
165 break;
166 default:
167 *len = 0;
168 *cst = 0;
169 fprintf (stream, "DISP bad size\n");
170 break;
174 static const char *regnames[] =
176 "r0h", "r1h", "r2h", "r3h", "r4h", "r5h", "r6h", "r7h",
177 "r0l", "r1l", "r2l", "r3l", "r4l", "r5l", "r6l", "r7l"
179 static const char *wregnames[] =
181 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
182 "e0", "e1", "e2", "e3", "e4", "e5", "e6", "e7"
184 static const char *lregnames[] =
186 "er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7",
187 "er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7"
189 static const char *cregnames[] =
191 "ccr", "exr", "mach", "macl", "", "", "vbr", "sbr"
194 static void
195 print_one_arg (info, addr, x, cst, cstlen, rdisp_n, rn, pregnames, len)
196 disassemble_info *info;
197 bfd_vma addr;
198 op_type x;
199 int cst, cstlen, rdisp_n, rn;
200 const char **pregnames;
201 int len;
203 void *stream = info->stream;
204 fprintf_ftype outfn = info->fprintf_func;
206 if ((x & SIZE) == L_3 ||
207 (x & SIZE) == L_3NZ)
209 outfn (stream, "#0x%x", (unsigned) cst);
211 else if ((x & MODE) == IMM)
213 outfn (stream, "#0x%x", (unsigned) cst);
215 else if ((x & MODE) == DBIT ||
216 (x & MODE) == KBIT)
218 outfn (stream, "#%d", (unsigned) cst);
220 else if ((x & MODE) == CONST_2)
221 outfn (stream, "#2");
222 else if ((x & MODE) == CONST_4)
223 outfn (stream, "#4");
224 else if ((x & MODE) == CONST_8)
225 outfn (stream, "#8");
226 else if ((x & MODE) == CONST_16)
227 outfn (stream, "#16");
228 else if ((x & MODE) == REG)
230 switch (x & SIZE)
232 case L_8:
233 outfn (stream, "%s", regnames[rn]);
234 break;
235 case L_16:
236 case L_16U:
237 outfn (stream, "%s", wregnames[rn]);
238 break;
239 case L_P:
240 case L_32:
241 outfn (stream, "%s", lregnames[rn]);
242 break;
245 else if ((x & MODE) == LOWREG)
247 switch (x & SIZE)
249 case L_8:
250 /* Always take low half of reg. */
251 outfn (stream, "%s.b", regnames[rn < 8 ? rn + 8 : rn]);
252 break;
253 case L_16:
254 case L_16U:
255 /* Always take low half of reg. */
256 outfn (stream, "%s.w", wregnames[rn < 8 ? rn : rn - 8]);
257 break;
258 case L_P:
259 case L_32:
260 outfn (stream, "%s.l", lregnames[rn]);
261 break;
264 else if ((x & MODE) == POSTINC)
266 outfn (stream, "@%s+", pregnames[rn]);
268 else if ((x & MODE) == POSTDEC)
270 outfn (stream, "@%s-", pregnames[rn]);
272 else if ((x & MODE) == PREINC)
274 outfn (stream, "@+%s", pregnames[rn]);
276 else if ((x & MODE) == PREDEC)
278 outfn (stream, "@-%s", pregnames[rn]);
280 else if ((x & MODE) == IND)
282 outfn (stream, "@%s", pregnames[rn]);
284 else if ((x & MODE) == ABS || (x & ABSJMP))
286 outfn (stream, "@0x%x:%d", (unsigned) cst, cstlen);
288 else if ((x & MODE) == MEMIND)
290 outfn (stream, "@@%d (0x%x)", cst, cst);
292 else if ((x & MODE) == VECIND)
294 /* FIXME Multiplier should be 2 or 4, depending on processor mode,
295 by which is meant "normal" vs. "middle", "advanced", "maximum". */
297 int offset = (cst + 0x80) * 4;
298 outfn (stream, "@@%d (0x%x)", offset, offset);
300 else if ((x & MODE) == PCREL)
302 if ((x & SIZE) == L_16 ||
303 (x & SIZE) == L_16U)
305 outfn (stream, ".%s%d (0x%x)",
306 (short) cst > 0 ? "+" : "",
307 (short) cst,
308 addr + (short) cst + len);
310 else
312 outfn (stream, ".%s%d (0x%x)",
313 (char) cst > 0 ? "+" : "",
314 (char) cst,
315 addr + (char) cst + len);
318 else if ((x & MODE) == DISP)
320 outfn (stream, "@(0x%x:%d,%s)", cst, cstlen,
321 pregnames[rdisp_n]);
323 else if ((x & MODE) == INDEXB)
325 /* Always take low half of reg. */
326 outfn (stream, "@(0x%x:%d,%s.b)", cst, cstlen,
327 regnames[rdisp_n < 8 ? rdisp_n + 8 : rdisp_n]);
329 else if ((x & MODE) == INDEXW)
331 /* Always take low half of reg. */
332 outfn (stream, "@(0x%x:%d,%s.w)", cst, cstlen,
333 wregnames[rdisp_n < 8 ? rdisp_n : rdisp_n - 8]);
335 else if ((x & MODE) == INDEXL)
337 outfn (stream, "@(0x%x:%d,%s.l)", cst, cstlen,
338 lregnames[rdisp_n]);
340 else if (x & CTRL)
342 outfn (stream, cregnames[rn]);
344 else if ((x & MODE) == CCR)
346 outfn (stream, "ccr");
348 else if ((x & MODE) == EXR)
350 outfn (stream, "exr");
352 else if ((x & MODE) == MACREG)
354 outfn (stream, "mac%c", cst ? 'l' : 'h');
356 else
357 /* xgettext:c-format */
358 outfn (stream, _("Hmmmm 0x%x"), x);
361 static unsigned int
362 bfd_h8_disassemble (addr, info, mach)
363 bfd_vma addr;
364 disassemble_info *info;
365 int mach;
367 /* Find the first entry in the table for this opcode. */
368 int regno[3] = { 0, 0, 0 };
369 int dispregno[3] = { 0, 0, 0 };
370 int cst[3] = { 0, 0, 0 };
371 int cstlen[3] = { 0, 0, 0 };
372 static bfd_boolean init = 0;
373 const struct h8_instruction *qi;
374 char const **pregnames = mach != 0 ? lregnames : wregnames;
375 int status;
376 unsigned int l;
377 unsigned char data[MAX_CODE_NIBBLES];
378 void *stream = info->stream;
379 fprintf_ftype outfn = info->fprintf_func;
381 if (!init)
383 bfd_h8_disassemble_init ();
384 init = 1;
387 status = info->read_memory_func (addr, data, 2, info);
388 if (status != 0)
390 info->memory_error_func (status, addr, info);
391 return -1;
394 for (l = 2; status == 0 && l < sizeof (data) / 2; l += 2)
395 status = info->read_memory_func (addr + l, data + l, 2, info);
397 /* Find the exact opcode/arg combo. */
398 for (qi = h8_instructions; qi->opcode->name; qi++)
400 const struct h8_opcode *q = qi->opcode;
401 op_type *nib = q->data.nib;
402 unsigned int len = 0;
404 while (1)
406 op_type looking_for = *nib;
407 int thisnib = data[len / 2];
408 int opnr;
410 thisnib = (len & 1) ? (thisnib & 0xf) : ((thisnib / 16) & 0xf);
411 opnr = ((looking_for & OP3) == OP3 ? 2
412 : (looking_for & DST) == DST ? 1 : 0);
414 if (looking_for < 16 && looking_for >= 0)
416 if (looking_for != thisnib)
417 goto fail;
419 else
421 if ((int) looking_for & (int) B31)
423 if (!((thisnib & 0x8) != 0))
424 goto fail;
426 looking_for = (op_type) ((int) looking_for & ~(int) B31);
427 thisnib &= 0x7;
429 else if ((int) looking_for & (int) B30)
431 if (!((thisnib & 0x8) == 0))
432 goto fail;
434 looking_for = (op_type) ((int) looking_for & ~(int) B30);
437 if ((int) looking_for & (int) B21)
439 if (!((thisnib & 0x4) != 0))
440 goto fail;
442 looking_for = (op_type) ((int) looking_for & ~(int) B21);
443 thisnib &= 0xb;
445 else if ((int) looking_for & (int) B20)
447 if (!((thisnib & 0x4) == 0))
448 goto fail;
450 looking_for = (op_type) ((int) looking_for & ~(int) B20);
452 if ((int) looking_for & (int) B11)
454 if (!((thisnib & 0x2) != 0))
455 goto fail;
457 looking_for = (op_type) ((int) looking_for & ~(int) B11);
458 thisnib &= 0xd;
460 else if ((int) looking_for & (int) B10)
462 if (!((thisnib & 0x2) == 0))
463 goto fail;
465 looking_for = (op_type) ((int) looking_for & ~(int) B10);
468 if ((int) looking_for & (int) B01)
470 if (!((thisnib & 0x1) != 0))
471 goto fail;
473 looking_for = (op_type) ((int) looking_for & ~(int) B01);
474 thisnib &= 0xe;
476 else if ((int) looking_for & (int) B00)
478 if (!((thisnib & 0x1) == 0))
479 goto fail;
481 looking_for = (op_type) ((int) looking_for & ~(int) B00);
484 if (looking_for & IGNORE)
486 /* Hitachi has declared that IGNORE must be zero. */
487 if (thisnib != 0)
488 goto fail;
490 else if ((looking_for & MODE) == DATA)
492 ; /* Skip embedded data. */
494 else if ((looking_for & MODE) == DBIT)
496 /* Exclude adds/subs by looking at bit 0 and 2, and
497 make sure the operand size, either w or l,
498 matches by looking at bit 1. */
499 if ((looking_for & 7) != (thisnib & 7))
500 goto fail;
502 cst[opnr] = (thisnib & 0x8) ? 2 : 1;
504 else if ((looking_for & MODE) == DISP ||
505 (looking_for & MODE) == ABS ||
506 (looking_for & MODE) == PCREL ||
507 (looking_for & MODE) == INDEXB ||
508 (looking_for & MODE) == INDEXW ||
509 (looking_for & MODE) == INDEXL)
511 extract_immediate (stream, looking_for, thisnib,
512 data + len / 2, cst + opnr,
513 cstlen + opnr, q);
514 /* Even address == bra, odd == bra/s. */
515 if (q->how == O (O_BRAS, SB))
516 cst[opnr] -= 1;
518 else if ((looking_for & MODE) == REG ||
519 (looking_for & MODE) == LOWREG ||
520 (looking_for & MODE) == IND ||
521 (looking_for & MODE) == PREINC ||
522 (looking_for & MODE) == POSTINC ||
523 (looking_for & MODE) == PREDEC ||
524 (looking_for & MODE) == POSTDEC)
526 regno[opnr] = thisnib;
528 else if (looking_for & CTRL) /* Control Register */
530 thisnib &= 7;
531 if (((looking_for & MODE) == CCR && (thisnib != C_CCR)) ||
532 ((looking_for & MODE) == EXR && (thisnib != C_EXR)) ||
533 ((looking_for & MODE) == MACH && (thisnib != C_MACH)) ||
534 ((looking_for & MODE) == MACL && (thisnib != C_MACL)) ||
535 ((looking_for & MODE) == VBR && (thisnib != C_VBR)) ||
536 ((looking_for & MODE) == SBR && (thisnib != C_SBR)))
537 goto fail;
538 if (((looking_for & MODE) == CCR_EXR &&
539 (thisnib != C_CCR && thisnib != C_EXR)) ||
540 ((looking_for & MODE) == VBR_SBR &&
541 (thisnib != C_VBR && thisnib != C_SBR)) ||
542 ((looking_for & MODE) == MACREG &&
543 (thisnib != C_MACH && thisnib != C_MACL)))
544 goto fail;
545 if (((looking_for & MODE) == CC_EX_VB_SB &&
546 (thisnib != C_CCR && thisnib != C_EXR &&
547 thisnib != C_VBR && thisnib != C_SBR)))
548 goto fail;
550 regno[opnr] = thisnib;
552 else if ((looking_for & SIZE) == L_5)
554 cst[opnr] = data[len / 2] & 31;
555 cstlen[opnr] = 5;
557 else if ((looking_for & SIZE) == L_4)
559 cst[opnr] = thisnib;
560 cstlen[opnr] = 4;
562 else if ((looking_for & SIZE) == L_16 ||
563 (looking_for & SIZE) == L_16U)
565 cst[opnr] = (data[len / 2]) * 256 + data[(len + 2) / 2];
566 cstlen[opnr] = 16;
568 else if ((looking_for & MODE) == MEMIND)
570 cst[opnr] = data[1];
572 else if ((looking_for & MODE) == VECIND)
574 cst[opnr] = data[1] & 0x7f;
576 else if ((looking_for & SIZE) == L_32)
578 int i = len / 2;
580 cst[opnr] = ((data[i] << 24)
581 | (data[i + 1] << 16)
582 | (data[i + 2] << 8)
583 | (data[i + 3]));
585 cstlen[opnr] = 32;
587 else if ((looking_for & SIZE) == L_24)
589 int i = len / 2;
591 cst[opnr] =
592 (data[i] << 16) | (data[i + 1] << 8) | (data[i + 2]);
593 cstlen[opnr] = 24;
595 else if (looking_for & IGNORE)
599 else if (looking_for & DISPREG)
601 dispregno[opnr] = thisnib & 7;
603 else if ((looking_for & MODE) == KBIT)
605 switch (thisnib)
607 case 9:
608 cst[opnr] = 4;
609 break;
610 case 8:
611 cst[opnr] = 2;
612 break;
613 case 0:
614 cst[opnr] = 1;
615 break;
616 default:
617 goto fail;
620 else if ((looking_for & SIZE) == L_8)
622 cstlen[opnr] = 8;
623 cst[opnr] = data[len / 2];
625 else if ((looking_for & SIZE) == L_3 ||
626 (looking_for & SIZE) == L_3NZ)
628 cst[opnr] = thisnib & 0x7;
629 if (cst[opnr] == 0 && (looking_for & SIZE) == L_3NZ)
630 goto fail;
632 else if ((looking_for & SIZE) == L_2)
634 cstlen[opnr] = 2;
635 cst[opnr] = thisnib & 0x3;
637 else if ((looking_for & MODE) == MACREG)
639 cst[opnr] = (thisnib == 3);
641 else if (looking_for == (op_type) E)
643 int i;
645 for (i = 0; i < qi->length; i++)
646 outfn (stream, "%02x ", data[i]);
648 for (; i < 6; i++)
649 outfn (stream, " ");
651 outfn (stream, "%s\t", q->name);
653 /* Gross. Disgusting. */
654 if (strcmp (q->name, "ldm.l") == 0)
656 int count, high;
658 count = (data[1] / 16) & 0x3;
659 high = regno[1];
661 outfn (stream, "@sp+,er%d-er%d", high - count, high);
662 return qi->length;
665 if (strcmp (q->name, "stm.l") == 0)
667 int count, low;
669 count = (data[1] / 16) & 0x3;
670 low = regno[0];
672 outfn (stream, "er%d-er%d,@-sp", low, low + count);
673 return qi->length;
675 if (strcmp (q->name, "rte/l") == 0
676 || strcmp (q->name, "rts/l") == 0)
678 if (regno[0] == 0)
679 outfn (stream, "er%d", regno[1]);
680 else
682 outfn (stream, "er%d-er%d", regno[1] - regno[0],
683 regno[1]);
685 return qi->length;
687 if (strncmp (q->name, "mova", 4) == 0)
689 op_type *args = q->args.nib;
691 if (args[1] == (op_type) E)
693 /* Short form. */
694 print_one_arg (info, addr, args[0], cst[0],
695 cstlen[0], dispregno[0], regno[0],
696 pregnames, qi->length);
697 outfn (stream, ",er%d", dispregno[0]);
699 else
701 outfn (stream, "@(0x%x:%d,", cst[0], cstlen[0]);
702 print_one_arg (info, addr, args[1], cst[1],
703 cstlen[1], dispregno[1], regno[1],
704 pregnames, qi->length);
705 outfn (stream, ".%c),",
706 (args[0] & MODE) == INDEXB ? 'b' : 'w');
707 print_one_arg (info, addr, args[2], cst[2],
708 cstlen[2], dispregno[2], regno[2],
709 pregnames, qi->length);
711 return qi->length;
713 /* Fill in the args. */
715 op_type *args = q->args.nib;
716 int hadone = 0;
717 int nargs;
719 for (nargs = 0;
720 nargs < 3 && args[nargs] != (op_type) E;
721 nargs++)
723 int x = args[nargs];
725 if (hadone)
726 outfn (stream, ",");
728 print_one_arg (info, addr, x,
729 cst[nargs], cstlen[nargs],
730 dispregno[nargs], regno[nargs],
731 pregnames, qi->length);
733 hadone = 1;
737 return qi->length;
739 else
740 /* xgettext:c-format */
741 outfn (stream, _("Don't understand 0x%x \n"), looking_for);
744 len++;
745 nib++;
748 fail:
752 /* Fell off the end. */
753 outfn (stream, "%02x %02x .word\tH'%x,H'%x",
754 data[0], data[1],
755 data[0], data[1]);
756 return 2;
760 print_insn_h8300 (addr, info)
761 bfd_vma addr;
762 disassemble_info *info;
764 return bfd_h8_disassemble (addr, info, 0);
768 print_insn_h8300h (addr, info)
769 bfd_vma addr;
770 disassemble_info *info;
772 return bfd_h8_disassemble (addr, info, 1);
776 print_insn_h8300s (addr, info)
777 bfd_vma addr;
778 disassemble_info *info;
780 return bfd_h8_disassemble (addr, info, 2);