1 /* Print instructions for the Texas TMS320C[34]X, for GDB and GNU Binutils.
3 Copyright (C) 2002-2018 Free Software Foundation, Inc.
5 Contributed by Michael P. Hayes (m.hayes@elec.canterbury.ac.nz)
7 This file is part of the GNU opcodes library.
9 This library is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
14 It is distributed in the hope that it will be useful, but WITHOUT
15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
17 License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
26 #include "libiberty.h"
27 #include "disassemble.h"
28 #include "opcode/tic4x.h"
32 #define TIC4X_HASH_SIZE 11 /* 11 (bits) and above should give unique entries. */
33 #define TIC4X_SPESOP_SIZE 8 /* Max 8. ops for special instructions. */
54 static int tic4x_version = 0;
55 static int tic4x_dp = 0;
58 tic4x_pc_offset (unsigned int op)
60 /* Determine the PC offset for a C[34]x instruction.
61 This could be simplified using some boolean algebra
62 but at the expense of readability. */
66 case 0x62: /* call (C4x) */
67 case 0x64: /* rptb (C4x) */
71 case 0x65: /* rptbd (C4x) */
80 switch ((op & 0xffe00000) >> 20)
83 case 0x720: /* callB */
84 case 0x740: /* trapB */
88 case 0x6a6: /* bBat */
89 case 0x6aa: /* bBaf */
90 case 0x722: /* lajB */
91 case 0x748: /* latB */
92 case 0x798: /* rptbd */
99 switch ((op & 0xfe200000) >> 20)
101 case 0x6e0: /* dbB */
104 case 0x6e2: /* dbBd */
115 tic4x_print_char (struct disassemble_info * info, char ch)
118 (*info->fprintf_func) (info->stream, "%c", ch);
123 tic4x_print_str (struct disassemble_info *info, const char *str)
126 (*info->fprintf_func) (info->stream, "%s", str);
131 tic4x_print_register (struct disassemble_info *info, unsigned long regno)
133 static tic4x_register_t ** registertable = NULL;
136 if (registertable == NULL)
138 registertable = xmalloc (sizeof (tic4x_register_t *) * REG_TABLE_SIZE);
139 for (i = 0; i < tic3x_num_registers; i++)
140 registertable[tic3x_registers[i].regno] = (tic4x_register_t *) (tic3x_registers + i);
141 if (IS_CPU_TIC4X (tic4x_version))
143 /* Add C4x additional registers, overwriting
144 any C3x registers if necessary. */
145 for (i = 0; i < tic4x_num_registers; i++)
146 registertable[tic4x_registers[i].regno] =
147 (tic4x_register_t *)(tic4x_registers + i);
150 if ((int) regno > (IS_CPU_TIC4X (tic4x_version) ? TIC4X_REG_MAX : TIC3X_REG_MAX))
153 (*info->fprintf_func) (info->stream, "%s", registertable[regno]->name);
158 tic4x_print_addr (struct disassemble_info *info, unsigned long addr)
161 (*info->print_address_func)(addr, info);
166 tic4x_print_relative (struct disassemble_info *info,
169 unsigned long opcode)
171 return tic4x_print_addr (info, pc + offset + tic4x_pc_offset (opcode));
175 tic4x_print_direct (struct disassemble_info *info, unsigned long arg)
179 (*info->fprintf_func) (info->stream, "@");
180 tic4x_print_addr (info, arg + (tic4x_dp << 16));
185 /* FIXME: make the floating point stuff not rely on host
186 floating point arithmetic. */
189 tic4x_print_ftoa (unsigned int val, FILE *stream, fprintf_ftype pfunc)
196 e = EXTRS (val, 31, 24); /* Exponent. */
199 s = EXTRU (val, 23, 23); /* Sign bit. */
200 f = EXTRU (val, 22, 0); /* Mantissa. */
205 num = f / (double)(1 << 23);
206 num = ldexp (num, e);
208 (*pfunc)(stream, "%.9g", num);
213 tic4x_print_immed (struct disassemble_info *info,
228 (*info->fprintf_func) (info->stream, "%ld", (long) arg);
233 (*info->fprintf_func) (info->stream, "%lu", arg);
237 e = EXTRS (arg, 15, 12);
240 s = EXTRU (arg, 11, 11);
241 f = EXTRU (arg, 10, 0);
246 num = f / (double)(1 << 11);
247 num = ldexp (num, e);
249 (*info->fprintf_func) (info->stream, "%f", num);
252 e = EXTRS (arg, 31, 24);
255 s = EXTRU (arg, 23, 23);
256 f = EXTRU (arg, 22, 0);
261 num = f / (double)(1 << 23);
262 num = ldexp (num, e);
264 (*info->fprintf_func) (info->stream, "%f", num);
271 tic4x_print_cond (struct disassemble_info *info, unsigned int cond)
273 static tic4x_cond_t **condtable = NULL;
276 if (condtable == NULL)
278 condtable = xmalloc (sizeof (tic4x_cond_t *) * 32);
279 for (i = 0; i < tic4x_num_conds; i++)
280 condtable[tic4x_conds[i].cond] = (tic4x_cond_t *)(tic4x_conds + i);
282 if (cond > 31 || condtable[cond] == NULL)
285 (*info->fprintf_func) (info->stream, "%s", condtable[cond]->name);
290 tic4x_print_indirect (struct disassemble_info *info,
304 case INDIRECT_TIC4X: /* *+ARn(disp) */
305 disp = EXTRU (arg, 7, 3);
306 aregno = EXTRU (arg, 2, 0) + REG_AR0;
311 aregno = EXTRU (arg, 2, 0) + REG_AR0;
312 modn = EXTRU (arg, 7, 3);
315 disp = EXTRU (arg, 7, 0);
316 aregno = EXTRU (arg, 10, 8) + REG_AR0;
317 modn = EXTRU (arg, 15, 11);
318 if (modn > 7 && disp != 0)
322 (*info->fprintf_func)(info->stream, "# internal error: Unknown indirect type %d", type);
325 if (modn > TIC3X_MODN_MAX)
327 a = tic4x_indirects[modn].name;
333 tic4x_print_register (info, aregno);
336 tic4x_print_immed (info, IMMED_UINT, disp);
339 tic4x_print_str (info, "ir0");
342 tic4x_print_str (info, "ir1");
345 tic4x_print_char (info, *a);
354 tic4x_print_op (struct disassemble_info *info,
355 unsigned long instruction,
361 const char *parallel = NULL;
363 /* Print instruction name. */
365 while (*s && parallel == NULL)
370 if (! tic4x_print_cond (info, EXTRU (instruction, 20, 16)))
374 if (! tic4x_print_cond (info, EXTRU (instruction, 27, 23)))
378 parallel = s + 1; /* Skip past `_' in name. */
381 tic4x_print_char (info, *s);
387 /* Print arguments. */
390 tic4x_print_char (info, ' ');
396 case '*': /* Indirect 0--15. */
397 if (! tic4x_print_indirect (info, INDIRECT_LONG,
398 EXTRU (instruction, 15, 0)))
402 case '#': /* Only used for ldp, ldpk. */
403 tic4x_print_immed (info, IMMED_UINT, EXTRU (instruction, 15, 0));
406 case '@': /* Direct 0--15. */
407 tic4x_print_direct (info, EXTRU (instruction, 15, 0));
410 case 'A': /* Address register 24--22. */
411 if (! tic4x_print_register (info, EXTRU (instruction, 24, 22) +
416 case 'B': /* 24-bit unsigned int immediate br(d)/call/rptb
418 if (IS_CPU_TIC4X (tic4x_version))
419 tic4x_print_relative (info, pc, EXTRS (instruction, 23, 0),
422 tic4x_print_addr (info, EXTRU (instruction, 23, 0));
425 case 'C': /* Indirect (short C4x) 0--7. */
426 if (! IS_CPU_TIC4X (tic4x_version))
428 if (! tic4x_print_indirect (info, INDIRECT_TIC4X,
429 EXTRU (instruction, 7, 0)))
434 /* Cockup if get here... */
437 case 'E': /* Register 0--7. */
439 if (! tic4x_print_register (info, EXTRU (instruction, 7, 0)))
443 case 'F': /* 16-bit float immediate 0--15. */
444 tic4x_print_immed (info, IMMED_SFLOAT,
445 EXTRU (instruction, 15, 0));
448 case 'i': /* Extended indirect 0--7. */
449 if (EXTRU (instruction, 7, 5) == 7)
451 if (!tic4x_print_register (info, EXTRU (instruction, 4, 0)))
457 case 'I': /* Indirect (short) 0--7. */
458 if (! tic4x_print_indirect (info, INDIRECT_SHORT,
459 EXTRU (instruction, 7, 0)))
463 case 'j': /* Extended indirect 8--15 */
464 if (EXTRU (instruction, 15, 13) == 7)
466 if (! tic4x_print_register (info, EXTRU (instruction, 12, 8)))
472 case 'J': /* Indirect (short) 8--15. */
473 if (! tic4x_print_indirect (info, INDIRECT_SHORT,
474 EXTRU (instruction, 15, 8)))
478 case 'G': /* Register 8--15. */
480 if (! tic4x_print_register (info, EXTRU (instruction, 15, 8)))
484 case 'H': /* Register 16--18. */
485 if (! tic4x_print_register (info, EXTRU (instruction, 18, 16)))
489 case 'K': /* Register 19--21. */
490 if (! tic4x_print_register (info, EXTRU (instruction, 21, 19)))
494 case 'L': /* Register 22--24. */
495 if (! tic4x_print_register (info, EXTRU (instruction, 24, 22)))
499 case 'M': /* Register 22--22. */
500 tic4x_print_register (info, EXTRU (instruction, 22, 22) + REG_R2);
503 case 'N': /* Register 23--23. */
504 tic4x_print_register (info, EXTRU (instruction, 23, 23) + REG_R0);
507 case 'O': /* Indirect (short C4x) 8--15. */
508 if (! IS_CPU_TIC4X (tic4x_version))
510 if (! tic4x_print_indirect (info, INDIRECT_TIC4X,
511 EXTRU (instruction, 15, 8)))
515 case 'P': /* Displacement 0--15 (used by Bcond and BcondD). */
516 tic4x_print_relative (info, pc, EXTRS (instruction, 15, 0),
520 case 'Q': /* Register 0--15. */
522 if (! tic4x_print_register (info, EXTRU (instruction, 15, 0)))
526 case 'R': /* Register 16--20. */
528 if (! tic4x_print_register (info, EXTRU (instruction, 20, 16)))
532 case 'S': /* 16-bit signed immediate 0--15. */
533 tic4x_print_immed (info, IMMED_SINT,
534 EXTRS (instruction, 15, 0));
537 case 'T': /* 5-bit signed immediate 16--20 (C4x stik). */
538 if (! IS_CPU_TIC4X (tic4x_version))
540 if (! tic4x_print_immed (info, IMMED_SUINT,
541 EXTRU (instruction, 20, 16)))
545 case 'U': /* 16-bit unsigned int immediate 0--15. */
546 tic4x_print_immed (info, IMMED_SUINT, EXTRU (instruction, 15, 0));
549 case 'V': /* 5/9-bit unsigned vector 0--4/8. */
550 tic4x_print_immed (info, IMMED_SUINT,
551 IS_CPU_TIC4X (tic4x_version) ?
552 EXTRU (instruction, 8, 0) :
553 EXTRU (instruction, 4, 0) & ~0x20);
556 case 'W': /* 8-bit signed immediate 0--7. */
557 if (! IS_CPU_TIC4X (tic4x_version))
559 tic4x_print_immed (info, IMMED_SINT, EXTRS (instruction, 7, 0));
562 case 'X': /* Expansion register 4--0. */
563 val = EXTRU (instruction, 4, 0) + REG_IVTP;
564 if (val < REG_IVTP || val > REG_TVTP)
566 if (! tic4x_print_register (info, val))
570 case 'Y': /* Address register 16--20. */
571 val = EXTRU (instruction, 20, 16);
572 if (val < REG_AR0 || val > REG_SP)
574 if (! tic4x_print_register (info, val))
578 case 'Z': /* Expansion register 16--20. */
579 val = EXTRU (instruction, 20, 16) + REG_IVTP;
580 if (val < REG_IVTP || val > REG_TVTP)
582 if (! tic4x_print_register (info, val))
586 case '|': /* Parallel instruction. */
587 tic4x_print_str (info, " || ");
588 tic4x_print_str (info, parallel);
589 tic4x_print_char (info, ' ');
593 tic4x_print_char (info, ',');
597 tic4x_print_char (info, *s);
606 tic4x_hash_opcode_special (tic4x_inst_t **optable_special,
607 const tic4x_inst_t *inst)
611 for (i = 0;i < TIC4X_SPESOP_SIZE; i++)
612 if (optable_special[i] != NULL
613 && optable_special[i]->opcode == inst->opcode)
615 /* Collision (we have it already) - overwrite. */
616 optable_special[i] = (tic4x_inst_t *) inst;
620 for (i = 0; i < TIC4X_SPESOP_SIZE; i++)
621 if (optable_special[i] == NULL)
623 /* Add the new opcode. */
624 optable_special[i] = (tic4x_inst_t *) inst;
628 /* This should never occur. This happens if the number of special
629 instructions exceeds TIC4X_SPESOP_SIZE. Please increase the variable
632 printf ("optable_special[] is full, please increase TIC4X_SPESOP_SIZE!\n");
637 tic4x_hash_opcode (tic4x_inst_t **optable,
638 tic4x_inst_t **optable_special,
639 const tic4x_inst_t *inst,
640 const unsigned long tic4x_oplevel)
643 int opcode = inst->opcode >> (32 - TIC4X_HASH_SIZE);
644 int opmask = inst->opmask >> (32 - TIC4X_HASH_SIZE);
646 /* Use a TIC4X_HASH_SIZE bit index as a hash index. We should
647 have unique entries so there's no point having a linked list
649 for (j = opcode; j < opmask; j++)
650 if ((j & opmask) == opcode
651 && inst->oplevel & tic4x_oplevel)
654 /* We should only have collisions for synonyms like
656 if (optable[j] != NULL)
657 printf ("Collision at index %d, %s and %s\n",
658 j, optable[j]->name, inst->name);
660 /* Catch those ops that collide with others already inside the
661 hash, and have a opmask greater than the one we use in the
662 hash. Store them in a special-list, that will handle full
663 32-bit INSN, not only the first 11-bit (or so). */
664 if (optable[j] != NULL
665 && inst->opmask & ~(opmask << (32 - TIC4X_HASH_SIZE)))
667 /* Add the instruction already on the list. */
668 tic4x_hash_opcode_special (optable_special, optable[j]);
670 /* Add the new instruction. */
671 tic4x_hash_opcode_special (optable_special, inst);
674 optable[j] = (tic4x_inst_t *) inst;
678 /* Disassemble the instruction in 'instruction'.
679 'pc' should be the address of this instruction, it will
680 be used to print the target address if this is a relative jump or call
681 the disassembled instruction is written to 'info'.
682 The function returns the length of this instruction in words. */
685 tic4x_disassemble (unsigned long pc,
686 unsigned long instruction,
687 struct disassemble_info *info)
689 static tic4x_inst_t **optable = NULL;
690 static tic4x_inst_t **optable_special = NULL;
693 unsigned long tic4x_oplevel;
695 tic4x_version = info->mach;
697 tic4x_oplevel = (IS_CPU_TIC4X (tic4x_version)) ? OP_C4X : 0;
698 tic4x_oplevel |= OP_C3X | OP_LPWR | OP_IDLE2 | OP_ENH;
702 optable = xcalloc (sizeof (tic4x_inst_t *), (1 << TIC4X_HASH_SIZE));
704 optable_special = xcalloc (sizeof (tic4x_inst_t *), TIC4X_SPESOP_SIZE);
706 /* Install opcodes in reverse order so that preferred
707 forms overwrite synonyms. */
708 for (i = tic4x_num_insts - 1; i >= 0; i--)
709 tic4x_hash_opcode (optable, optable_special, &tic4x_insts[i],
712 /* We now need to remove the insn that are special from the
713 "normal" optable, to make the disasm search this extra list
715 for (i = 0; i < TIC4X_SPESOP_SIZE; i++)
716 if (optable_special[i] != NULL)
717 optable[optable_special[i]->opcode >> (32 - TIC4X_HASH_SIZE)] = NULL;
720 /* See if we can pick up any loading of the DP register... */
721 if ((instruction >> 16) == 0x5070 || (instruction >> 16) == 0x1f70)
722 tic4x_dp = EXTRU (instruction, 15, 0);
724 p = optable[instruction >> (32 - TIC4X_HASH_SIZE)];
727 if (((instruction & p->opmask) == p->opcode)
728 && tic4x_print_op (NULL, instruction, p, pc))
729 tic4x_print_op (info, instruction, p, pc);
731 (*info->fprintf_func) (info->stream, "%08lx", instruction);
735 for (i = 0; i<TIC4X_SPESOP_SIZE; i++)
736 if (optable_special[i] != NULL
737 && optable_special[i]->opcode == instruction)
739 (*info->fprintf_func)(info->stream, "%s", optable_special[i]->name);
742 if (i == TIC4X_SPESOP_SIZE)
743 (*info->fprintf_func) (info->stream, "%08lx", instruction);
746 /* Return size of insn in words. */
750 /* The entry point from objdump and gdb. */
752 print_insn_tic4x (bfd_vma memaddr, struct disassemble_info *info)
759 status = (*info->read_memory_func) (memaddr, buffer, 4, info);
762 (*info->memory_error_func) (status, memaddr, info);
767 op = bfd_getl32 (buffer);
768 info->bytes_per_line = 4;
769 info->bytes_per_chunk = 4;
770 info->octets_per_byte = 4;
771 info->display_endian = BFD_ENDIAN_LITTLE;
772 return tic4x_disassemble (pc, op, info) * 4;