aboutsummaryrefslogtreecommitdiff
path: root/opcodes/tic54x-dis.c
blob: c3cd88cdeac8fb5270852363a3f862637ca7bf68 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
/* Disassembly routines for TMS320C54X architecture
   Copyright (C) 1999-2017 Free Software Foundation, Inc.
   Contributed by Timothy Wall (twall@cygnus.com)

   This file is part of the GNU opcodes library.

   This library is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3, or (at your option)
   any later version.

   It is distributed in the hope that it will be useful, but WITHOUT
   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
   License for more details.

   You should have received a copy of the GNU General Public License
   along with this file; see the file COPYING.  If not, write to the
   Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */

#include "sysdep.h"
#include <errno.h>
#include <math.h>
#include <stdlib.h>
#include "disassemble.h"
#include "opcode/tic54x.h"
#include "coff/tic54x.h"

static int has_lkaddr (unsigned short, const insn_template *);
static int get_insn_size (unsigned short, const insn_template *);
static int print_instruction (disassemble_info *, bfd_vma,
                              unsigned short, const char *,
                              const enum optype [], int, int);
static int print_parallel_instruction (disassemble_info *, bfd_vma,
                                       unsigned short,
                                       const insn_template *, int);
static int sprint_dual_address (disassemble_info *,char [],
                                unsigned short);
static int sprint_indirect_address (disassemble_info *,char [],
                                    unsigned short);
static int sprint_direct_address (disassemble_info *,char [],
                                  unsigned short);
static int sprint_mmr (disassemble_info *,char [],int);
static int sprint_condition (disassemble_info *,char *,unsigned short);
static int sprint_cc2 (disassemble_info *,char *,unsigned short);

int
print_insn_tic54x (bfd_vma memaddr, disassemble_info *info)
{
  bfd_byte opbuf[2];
  unsigned short opcode;
  int status, size;
  const insn_template* tm;

  status = (*info->read_memory_func) (memaddr, opbuf, 2, info);
  if (status != 0)
  {
    (*info->memory_error_func) (status, memaddr, info);
    return -1;
  }

  opcode = bfd_getl16 (opbuf);
  tm = tic54x_get_insn (info, memaddr, opcode, &size);

  info->bytes_per_line = 2;
  info->bytes_per_chunk = 2;
  info->octets_per_byte = 2;
  info->display_endian = BFD_ENDIAN_LITTLE;

  if (tm->flags & FL_PAR)
  {
    if (!print_parallel_instruction (info, memaddr, opcode, tm, size))
      return -1;
  }
  else
  {
    if (!print_instruction (info, memaddr, opcode,
                            (char *) tm->name,
                            tm->operand_types,
                            size, (tm->flags & FL_EXT)))
      return -1;
  }

  return size * 2;
}

static int
has_lkaddr (unsigned short memdata, const insn_template *tm)
{
  return (IS_LKADDR (memdata)
	  && (OPTYPE (tm->operand_types[0]) == OP_Smem
	      || OPTYPE (tm->operand_types[1]) == OP_Smem
	      || OPTYPE (tm->operand_types[2]) == OP_Smem
	      || OPTYPE (tm->operand_types[1]) == OP_Sind
              || OPTYPE (tm->operand_types[0]) == OP_Lmem
              || OPTYPE (tm->operand_types[1]) == OP_Lmem));
}

/* always returns 1 (whether an insn template was found) since we provide an
   "unknown instruction" template */
const insn_template*
tic54x_get_insn (disassemble_info *info, bfd_vma addr,
                 unsigned short memdata, int *size)
{
  const insn_template *tm = NULL;

  for (tm = tic54x_optab; tm->name; tm++)
  {
    if (tm->opcode == (memdata & tm->mask))
    {
      /* a few opcodes span two words */
      if (tm->flags & FL_EXT)
        {
          /* if lk addressing is used, the second half of the opcode gets
             pushed one word later */
          bfd_byte opbuf[2];
          bfd_vma addr2 = addr + 1 + has_lkaddr (memdata, tm);
          int status = (*info->read_memory_func) (addr2, opbuf, 2, info);
          // FIXME handle errors
          if (status == 0)
            {
              unsigned short data2 = bfd_getl16 (opbuf);
              if (tm->opcode2 == (data2 & tm->mask2))
                {
                  if (size) *size = get_insn_size (memdata, tm);
                  return tm;
                }
            }
        }
      else
        {
          if (size) *size = get_insn_size (memdata, tm);
          return tm;
        }
    }
  }
  for (tm = (insn_template *) tic54x_paroptab; tm->name; tm++)
  {
    if (tm->opcode == (memdata & tm->mask))
    {
      if (size) *size = get_insn_size (memdata, tm);
      return tm;
    }
  }

  if (size) *size = 1;
  return &tic54x_unknown_opcode;
}

static int
get_insn_size (unsigned short memdata, const insn_template *insn)
{
  int size;

  if (insn->flags & FL_PAR)
    {
      /* only non-parallel instructions support lk addressing */
      size = insn->words;
    }
  else
    {
      size = insn->words + has_lkaddr (memdata, insn);
    }

  return size;
}

int
print_instruction (disassemble_info *info,
		   bfd_vma memaddr,
		   unsigned short opcode,
		   const char *tm_name,
		   const enum optype tm_operands[],
		   int size,
		   int ext)
{
  static int n;
  /* string storage for multiple operands */
  char operand[4][64] = { {0},{0},{0},{0}, };
  bfd_byte buf[2];
  unsigned long opcode2 = 0;
  unsigned long lkaddr = 0;
  enum optype src = OP_None;
  enum optype dst = OP_None;
  int i, shift;
  char *comma = "";

  info->fprintf_func (info->stream, "%-7s", tm_name);

  if (size > 1)
    {
      int status = (*info->read_memory_func) (memaddr + 1, buf, 2, info);
      if (status != 0)
        return 0;
      lkaddr = opcode2 = bfd_getl16 (buf);
      if (size > 2)
        {
          status = (*info->read_memory_func) (memaddr + 2, buf, 2, info);
          if (status != 0)
            return 0;
          opcode2 = bfd_getl16 (buf);
        }
    }

  for (i = 0; i < MAX_OPERANDS && OPTYPE (tm_operands[i]) != OP_None; i++)
    {
      char *next_comma = ",";
      int optional = (tm_operands[i] & OPT) != 0;

      switch (OPTYPE (tm_operands[i]))
        {
        case OP_Xmem:
          sprint_dual_address (info, operand[i], XMEM (opcode));
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_Ymem:
          sprint_dual_address (info, operand[i], YMEM (opcode));
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_Smem:
        case OP_Sind:
        case OP_Lmem:
          info->fprintf_func (info->stream, "%s", comma);
          if (INDIRECT (opcode))
            {
              if (MOD (opcode) >= 12)
                {
                  bfd_vma addr = lkaddr;
                  int arf = ARF (opcode);
                  int mod = MOD (opcode);
                  if (mod == 15)
                      info->fprintf_func (info->stream, "*(");
                  else
                      info->fprintf_func (info->stream, "*%sar%d(",
                                          (mod == 13 || mod == 14 ? "+" : ""),
                                          arf);
                  (*(info->print_address_func)) ((bfd_vma) addr, info);
                  info->fprintf_func (info->stream, ")%s",
                                      mod == 14 ? "%" : "");
                }
              else
                {
                  sprint_indirect_address (info, operand[i], opcode);
                  info->fprintf_func (info->stream, "%s", operand[i]);
                }
            }
          else
          {
            /* FIXME -- use labels (print_address_func) */
            /* in order to do this, we need to guess what DP is */
            sprint_direct_address (info, operand[i], opcode);
            info->fprintf_func (info->stream, "%s", operand[i]);
          }
          break;
        case OP_dmad:
          info->fprintf_func (info->stream, "%s", comma);
          (*(info->print_address_func)) ((bfd_vma) opcode2, info);
          break;
        case OP_xpmad:
          /* upper 7 bits of address are in the opcode */
          opcode2 += ((unsigned long) opcode & 0x7F) << 16;
          /* fall through */
        case OP_pmad:
          info->fprintf_func (info->stream, "%s", comma);
          (*(info->print_address_func)) ((bfd_vma) opcode2, info);
          break;
        case OP_MMRX:
          sprint_mmr (info, operand[i], MMRX (opcode));
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_MMRY:
          sprint_mmr (info, operand[i], MMRY (opcode));
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_MMR:
          sprint_mmr (info, operand[i], MMR (opcode));
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_PA:
          sprintf (operand[i], "pa%d", (unsigned) opcode2);
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_SRC:
          src = SRC (ext ? opcode2 : opcode) ? OP_B : OP_A;
          sprintf (operand[i], (src == OP_B) ? "b" : "a");
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_SRC1:
          src = SRC1 (ext ? opcode2 : opcode) ? OP_B : OP_A;
          sprintf (operand[i], (src == OP_B) ? "b" : "a");
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_RND:
          dst = DST (opcode) ? OP_B : OP_A;
          sprintf (operand[i], (dst == OP_B) ? "a" : "b");
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_DST:
          dst = DST (ext ? opcode2 : opcode) ? OP_B : OP_A;
          if (!optional || dst != src)
            {
              sprintf (operand[i], (dst == OP_B) ? "b" : "a");
              info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
            }
          else
            next_comma = comma;
          break;
        case OP_B:
          sprintf (operand[i], "b");
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_A:
          sprintf (operand[i], "a");
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_ARX:
          sprintf (operand[i], "ar%d", (int) ARX (opcode));
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_SHIFT:
          shift = SHIFT (ext ? opcode2 : opcode);
          if (!optional || shift != 0)
            {
              sprintf (operand[i], "%d", shift);
              info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
            }
          else
            next_comma = comma;
          break;
        case OP_SHFT:
          shift = SHFT (opcode);
          if (!optional || shift != 0)
            {
              sprintf (operand[i], "%d", (unsigned) shift);
              info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
            }
          else
            next_comma = comma;
          break;
        case OP_lk:
          sprintf (operand[i], "#%d", (int) (short) opcode2);
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_T:
          sprintf (operand[i], "t");
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_TS:
          sprintf (operand[i], "ts");
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_k8:
          sprintf (operand[i], "%d", (int) ((signed char) (opcode & 0xFF)));
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_16:
          sprintf (operand[i], "16");
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_ASM:
          sprintf (operand[i], "asm");
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_BITC:
          sprintf (operand[i], "%d", (int) (opcode & 0xF));
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_CC:
          /* put all CC operands in the same operand */
          sprint_condition (info, operand[i], opcode);
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          i = MAX_OPERANDS;
          break;
        case OP_CC2:
          sprint_cc2 (info, operand[i], opcode);
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_CC3:
        {
          const char *code[] = { "eq", "lt", "gt", "neq" };

	  /* Do not use sprintf with only two parameters as a
	     compiler warning could be generated in such conditions.  */
	  sprintf (operand[i], "%s", code[CC3 (opcode)]);
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        }
        case OP_123:
          {
            int code = (opcode >> 8) & 0x3;
            sprintf (operand[i], "%d", (code == 0) ? 1 : (code == 2) ? 2 : 3);
            info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
            break;
          }
        case OP_k5:
          sprintf (operand[i], "#%d",
                   (int) (((signed char) opcode & 0x1F) << 3) >> 3);
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_k8u:
          sprintf (operand[i], "#%d", (unsigned) (opcode & 0xFF));
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_k3:
          sprintf (operand[i], "#%d", (int) (opcode & 0x7));
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_lku:
          sprintf (operand[i], "#%d", (unsigned) opcode2);
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_N:
          n = (opcode >> 9) & 0x1;
          sprintf (operand[i], "st%d", n);
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_SBIT:
        {
          const char *status0[] = {
            "0", "1", "2", "3", "4", "5", "6", "7", "8",
            "ovb", "ova", "c", "tc", "13", "14", "15"
          };
          const char *status1[] = {
            "0", "1", "2", "3", "4",
            "cmpt", "frct", "c16", "sxm", "ovm", "10",
            "intm", "hm", "xf", "cpl", "braf"
          };
          sprintf (operand[i], "%s",
                   n ? status1[SBIT (opcode)] : status0[SBIT (opcode)]);
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        }
        case OP_12:
          sprintf (operand[i], "%d", (int) ((opcode >> 9) & 1) + 1);
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_TRN:
          sprintf (operand[i], "trn");
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_DP:
          sprintf (operand[i], "dp");
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_k9:
          /* FIXME-- this is DP, print the original address? */
          sprintf (operand[i], "#%d", (int) (opcode & 0x1FF));
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_ARP:
          sprintf (operand[i], "arp");
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        case OP_031:
          sprintf (operand[i], "%d", (int) (opcode & 0x1F));
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        default:
          sprintf (operand[i], "??? (0x%x)", tm_operands[i]);
          info->fprintf_func (info->stream, "%s%s", comma, operand[i]);
          break;
        }
      comma = next_comma;
    }
  return 1;
}

static int
print_parallel_instruction (disassemble_info *info,
			    bfd_vma memaddr,
			    unsigned short opcode,
			    const insn_template *ptm,
			    int size)
{
  print_instruction (info, memaddr, opcode,
                     ptm->name, ptm->operand_types, size, 0);
  info->fprintf_func (info->stream, " || ");
  return print_instruction (info, memaddr, opcode,
                            ptm->parname, ptm->paroperand_types, size, 0);
}

static int
sprint_dual_address (disassemble_info *info ATTRIBUTE_UNUSED,
		     char buf[],
		     unsigned short code)
{
  const char *formats[] = {
    "*ar%d",
    "*ar%d-",
    "*ar%d+",
    "*ar%d+0%%",
  };
  return sprintf (buf, formats[XMOD (code)], XARX (code));
}

static int
sprint_indirect_address (disassemble_info *info ATTRIBUTE_UNUSED,
			 char buf[],
			 unsigned short opcode)
{
  const char *formats[] = {
    "*ar%d",
    "*ar%d-",
    "*ar%d+",
    "*+ar%d",
    "*ar%d-0B",
    "*ar%d-0",
    "*ar%d+0",
    "*ar%d+0B",
    "*ar%d-%%",
    "*ar%d-0%%",
    "*ar%d+%%",
    "*ar%d+0%%",
  };
  return sprintf (buf, formats[MOD (opcode)], ARF (opcode));
}

static int
sprint_direct_address (disassemble_info *info ATTRIBUTE_UNUSED,
		       char buf[],
		       unsigned short opcode)
{
  /* FIXME -- look up relocation if available */
  return sprintf (buf, "DP+0x%02x", (int) (opcode & 0x7F));
}

static int
sprint_mmr (disassemble_info *info ATTRIBUTE_UNUSED,
	    char buf[],
	    int mmr)
{
  tic54x_symbol *reg = (tic54x_symbol *) mmregs;
  while (reg->name != NULL)
    {
      if (mmr == reg->value)
        {
          sprintf (buf, "%s", (reg + 1)->name);
          return 1;
        }
      ++reg;
    }
  sprintf (buf, "MMR(%d)", mmr); /* FIXME -- different targets.  */
  return 0;
}

static int
sprint_cc2 (disassemble_info *info ATTRIBUTE_UNUSED,
	    char *buf,
	    unsigned short opcode)
{
  const char *cc2[] = {
    "??", "??", "ageq", "alt", "aneq", "aeq", "agt", "aleq",
    "??", "??", "bgeq", "blt", "bneq", "beq", "bgt", "bleq",
  };
  return sprintf (buf, "%s", cc2[opcode & 0xF]);
}

static int
sprint_condition (disassemble_info *info ATTRIBUTE_UNUSED,
		  char *buf,
		  unsigned short opcode)
{
  char *start = buf;
  const char *cmp[] = {
      "??", "??", "geq", "lt", "neq", "eq", "gt", "leq"
  };
  if (opcode & 0x40)
    {
      char acc = (opcode & 0x8) ? 'b' : 'a';
      if (opcode & 0x7)
          buf += sprintf (buf, "%c%s%s", acc, cmp[(opcode & 0x7)],
                          (opcode & 0x20) ? ", " : "");
      if (opcode & 0x20)
          buf += sprintf (buf, "%c%s", acc, (opcode & 0x10) ? "ov" : "nov");
    }
  else if (opcode & 0x3F)
    {
      if (opcode & 0x30)
        buf += sprintf (buf, "%s%s",
                        ((opcode & 0x30) == 0x30) ? "tc" : "ntc",
                        (opcode & 0x0F) ? ", " : "");
      if (opcode & 0x0C)
        buf += sprintf (buf, "%s%s",
                        ((opcode & 0x0C) == 0x0C) ? "c" : "nc",
                        (opcode & 0x03) ? ", " : "");
      if (opcode & 0x03)
        buf += sprintf (buf, "%s",
                        ((opcode & 0x03) == 0x03) ? "bio" : "nbio");
    }
  else
    buf += sprintf (buf, "unc");

  return buf - start;
}