1 /* Print instructions for the Texas TMS320C[34]X, for GDB and GNU Binutils.
3 Copyright 2002, 2003, 2005, 2007 Free Software Foundation, Inc.
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. */
25 #include "libiberty.h"
27 #include "opcode/tic4x.h"
31 #define TIC4X_HASH_SIZE 11 /* 11 (bits) and above should give unique entries. */
32 #define TIC4X_SPESOP_SIZE 8 /* Max 8. ops for special instructions. */
53 static int tic4x_version = 0;
54 static int tic4x_dp = 0;
57 tic4x_pc_offset (unsigned int op)
59 /* Determine the PC offset for a C[34]x instruction.
60 This could be simplified using some boolean algebra
61 but at the expense of readability. */
65 case 0x62: /* call (C4x) */
66 case 0x64: /* rptb (C4x) */
70 case 0x65: /* rptbd (C4x) */
79 switch ((op & 0xffe00000) >> 20)
82 case 0x720: /* callB */
83 case 0x740: /* trapB */
87 case 0x6a6: /* bBat */
88 case 0x6aa: /* bBaf */
89 case 0x722: /* lajB */
90 case 0x748: /* latB */
91 case 0x798: /* rptbd */
98 switch ((op & 0xfe200000) >> 20)
100 case 0x6e0: /* dbB */
103 case 0x6e2: /* dbBd */
114 tic4x_print_char (struct disassemble_info * info, char ch)
117 (*info->fprintf_func) (info->stream, "%c", ch);
122 tic4x_print_str (struct disassemble_info *info, char *str)
125 (*info->fprintf_func) (info->stream, "%s", str);
130 tic4x_print_register (struct disassemble_info *info, unsigned long regno)
132 static tic4x_register_t ** registertable = NULL;
135 if (registertable == NULL)
137 registertable = xmalloc (sizeof (tic4x_register_t *) * REG_TABLE_SIZE);
138 for (i = 0; i < tic3x_num_registers; i++)
139 registertable[tic3x_registers[i].regno] = (tic4x_register_t *) (tic3x_registers + i);
140 if (IS_CPU_TIC4X (tic4x_version))
142 /* Add C4x additional registers, overwriting
143 any C3x registers if necessary. */
144 for (i = 0; i < tic4x_num_registers; i++)
145 registertable[tic4x_registers[i].regno] =
146 (tic4x_register_t *)(tic4x_registers + i);
149 if ((int) regno > (IS_CPU_TIC4X (tic4x_version) ? TIC4X_REG_MAX : TIC3X_REG_MAX))
152 (*info->fprintf_func) (info->stream, "%s", registertable[regno]->name);
157 tic4x_print_addr (struct disassemble_info *info, unsigned long addr)
160 (*info->print_address_func)(addr, info);
165 tic4x_print_relative (struct disassemble_info *info,
168 unsigned long opcode)
170 return tic4x_print_addr (info, pc + offset + tic4x_pc_offset (opcode));
174 tic4x_print_direct (struct disassemble_info *info, unsigned long arg)
178 (*info->fprintf_func) (info->stream, "@");
179 tic4x_print_addr (info, arg + (tic4x_dp << 16));
184 /* FIXME: make the floating point stuff not rely on host
185 floating point arithmetic. */
188 tic4x_print_ftoa (unsigned int val, FILE *stream, fprintf_ftype pfunc)
195 e = EXTRS (val, 31, 24); /* Exponent. */
198 s = EXTRU (val, 23, 23); /* Sign bit. */
199 f = EXTRU (val, 22, 0); /* Mantissa. */
204 num = f / (double)(1 << 23);
205 num = ldexp (num, e);
207 (*pfunc)(stream, "%.9g", num);
212 tic4x_print_immed (struct disassemble_info *info,
227 (*info->fprintf_func) (info->stream, "%ld", (long) arg);
232 (*info->fprintf_func) (info->stream, "%lu", arg);
236 e = EXTRS (arg, 15, 12);
239 s = EXTRU (arg, 11, 11);
240 f = EXTRU (arg, 10, 0);
245 num = f / (double)(1 << 11);
246 num = ldexp (num, e);
248 (*info->fprintf_func) (info->stream, "%f", num);
251 e = EXTRS (arg, 31, 24);
254 s = EXTRU (arg, 23, 23);
255 f = EXTRU (arg, 22, 0);
260 num = f / (double)(1 << 23);
261 num = ldexp (num, e);
263 (*info->fprintf_func) (info->stream, "%f", num);
270 tic4x_print_cond (struct disassemble_info *info, unsigned int cond)
272 static tic4x_cond_t **condtable = NULL;
275 if (condtable == NULL)
277 condtable = xmalloc (sizeof (tic4x_cond_t *) * 32);
278 for (i = 0; i < tic4x_num_conds; i++)
279 condtable[tic4x_conds[i].cond] = (tic4x_cond_t *)(tic4x_conds + i);
281 if (cond > 31 || condtable[cond] == NULL)
284 (*info->fprintf_func) (info->stream, "%s", condtable[cond]->name);
289 tic4x_print_indirect (struct disassemble_info *info,
303 case INDIRECT_TIC4X: /* *+ARn(disp) */
304 disp = EXTRU (arg, 7, 3);
305 aregno = EXTRU (arg, 2, 0) + REG_AR0;
310 aregno = EXTRU (arg, 2, 0) + REG_AR0;
311 modn = EXTRU (arg, 7, 3);
314 disp = EXTRU (arg, 7, 0);
315 aregno = EXTRU (arg, 10, 8) + REG_AR0;
316 modn = EXTRU (arg, 15, 11);
317 if (modn > 7 && disp != 0)
321 (*info->fprintf_func)(info->stream, "# internal error: Unknown indirect type %d", type);
324 if (modn > TIC3X_MODN_MAX)
326 a = tic4x_indirects[modn].name;
332 tic4x_print_register (info, aregno);
335 tic4x_print_immed (info, IMMED_UINT, disp);
338 tic4x_print_str (info, "ir0");
341 tic4x_print_str (info, "ir1");
344 tic4x_print_char (info, *a);
353 tic4x_print_op (struct disassemble_info *info,
354 unsigned long instruction,
360 char *parallel = NULL;
362 /* Print instruction name. */
364 while (*s && parallel == NULL)
369 if (! tic4x_print_cond (info, EXTRU (instruction, 20, 16)))
373 if (! tic4x_print_cond (info, EXTRU (instruction, 27, 23)))
377 parallel = s + 1; /* Skip past `_' in name. */
380 tic4x_print_char (info, *s);
386 /* Print arguments. */
389 tic4x_print_char (info, ' ');
395 case '*': /* Indirect 0--15. */
396 if (! tic4x_print_indirect (info, INDIRECT_LONG,
397 EXTRU (instruction, 15, 0)))
401 case '#': /* Only used for ldp, ldpk. */
402 tic4x_print_immed (info, IMMED_UINT, EXTRU (instruction, 15, 0));
405 case '@': /* Direct 0--15. */
406 tic4x_print_direct (info, EXTRU (instruction, 15, 0));
409 case 'A': /* Address register 24--22. */
410 if (! tic4x_print_register (info, EXTRU (instruction, 24, 22) +
415 case 'B': /* 24-bit unsigned int immediate br(d)/call/rptb
417 if (IS_CPU_TIC4X (tic4x_version))
418 tic4x_print_relative (info, pc, EXTRS (instruction, 23, 0),
421 tic4x_print_addr (info, EXTRU (instruction, 23, 0));
424 case 'C': /* Indirect (short C4x) 0--7. */
425 if (! IS_CPU_TIC4X (tic4x_version))
427 if (! tic4x_print_indirect (info, INDIRECT_TIC4X,
428 EXTRU (instruction, 7, 0)))
433 /* Cockup if get here... */
436 case 'E': /* Register 0--7. */
438 if (! tic4x_print_register (info, EXTRU (instruction, 7, 0)))
442 case 'F': /* 16-bit float immediate 0--15. */
443 tic4x_print_immed (info, IMMED_SFLOAT,
444 EXTRU (instruction, 15, 0));
447 case 'i': /* Extended indirect 0--7. */
448 if (EXTRU (instruction, 7, 5) == 7)
450 if (!tic4x_print_register (info, EXTRU (instruction, 4, 0)))
456 case 'I': /* Indirect (short) 0--7. */
457 if (! tic4x_print_indirect (info, INDIRECT_SHORT,
458 EXTRU (instruction, 7, 0)))
462 case 'j': /* Extended indirect 8--15 */
463 if (EXTRU (instruction, 15, 13) == 7)
465 if (! tic4x_print_register (info, EXTRU (instruction, 12, 8)))
470 case 'J': /* Indirect (short) 8--15. */
471 if (! tic4x_print_indirect (info, INDIRECT_SHORT,
472 EXTRU (instruction, 15, 8)))
476 case 'G': /* Register 8--15. */
478 if (! tic4x_print_register (info, EXTRU (instruction, 15, 8)))
482 case 'H': /* Register 16--18. */
483 if (! tic4x_print_register (info, EXTRU (instruction, 18, 16)))
487 case 'K': /* Register 19--21. */
488 if (! tic4x_print_register (info, EXTRU (instruction, 21, 19)))
492 case 'L': /* Register 22--24. */
493 if (! tic4x_print_register (info, EXTRU (instruction, 24, 22)))
497 case 'M': /* Register 22--22. */
498 tic4x_print_register (info, EXTRU (instruction, 22, 22) + REG_R2);
501 case 'N': /* Register 23--23. */
502 tic4x_print_register (info, EXTRU (instruction, 23, 23) + REG_R0);
505 case 'O': /* Indirect (short C4x) 8--15. */
506 if (! IS_CPU_TIC4X (tic4x_version))
508 if (! tic4x_print_indirect (info, INDIRECT_TIC4X,
509 EXTRU (instruction, 15, 8)))
513 case 'P': /* Displacement 0--15 (used by Bcond and BcondD). */
514 tic4x_print_relative (info, pc, EXTRS (instruction, 15, 0),
518 case 'Q': /* Register 0--15. */
520 if (! tic4x_print_register (info, EXTRU (instruction, 15, 0)))
524 case 'R': /* Register 16--20. */
526 if (! tic4x_print_register (info, EXTRU (instruction, 20, 16)))
530 case 'S': /* 16-bit signed immediate 0--15. */
531 tic4x_print_immed (info, IMMED_SINT,
532 EXTRS (instruction, 15, 0));
535 case 'T': /* 5-bit signed immediate 16--20 (C4x stik). */
536 if (! IS_CPU_TIC4X (tic4x_version))
538 if (! tic4x_print_immed (info, IMMED_SUINT,
539 EXTRU (instruction, 20, 16)))
543 case 'U': /* 16-bit unsigned int immediate 0--15. */
544 tic4x_print_immed (info, IMMED_SUINT, EXTRU (instruction, 15, 0));
547 case 'V': /* 5/9-bit unsigned vector 0--4/8. */
548 tic4x_print_immed (info, IMMED_SUINT,
549 IS_CPU_TIC4X (tic4x_version) ?
550 EXTRU (instruction, 8, 0) :
551 EXTRU (instruction, 4, 0) & ~0x20);
554 case 'W': /* 8-bit signed immediate 0--7. */
555 if (! IS_CPU_TIC4X (tic4x_version))
557 tic4x_print_immed (info, IMMED_SINT, EXTRS (instruction, 7, 0));
560 case 'X': /* Expansion register 4--0. */
561 val = EXTRU (instruction, 4, 0) + REG_IVTP;
562 if (val < REG_IVTP || val > REG_TVTP)
564 if (! tic4x_print_register (info, val))
568 case 'Y': /* Address register 16--20. */
569 val = EXTRU (instruction, 20, 16);
570 if (val < REG_AR0 || val > REG_SP)
572 if (! tic4x_print_register (info, val))
576 case 'Z': /* Expansion register 16--20. */
577 val = EXTRU (instruction, 20, 16) + REG_IVTP;
578 if (val < REG_IVTP || val > REG_TVTP)
580 if (! tic4x_print_register (info, val))
584 case '|': /* Parallel instruction. */
585 tic4x_print_str (info, " || ");
586 tic4x_print_str (info, parallel);
587 tic4x_print_char (info, ' ');
591 tic4x_print_char (info, ',');
595 tic4x_print_char (info, *s);
604 tic4x_hash_opcode_special (tic4x_inst_t **optable_special,
605 const tic4x_inst_t *inst)
609 for (i = 0;i < TIC4X_SPESOP_SIZE; i++)
610 if (optable_special[i] != NULL
611 && optable_special[i]->opcode == inst->opcode)
613 /* Collision (we have it already) - overwrite. */
614 optable_special[i] = (tic4x_inst_t *) inst;
618 for (i = 0; i < TIC4X_SPESOP_SIZE; i++)
619 if (optable_special[i] == NULL)
621 /* Add the new opcode. */
622 optable_special[i] = (tic4x_inst_t *) inst;
626 /* This should never occur. This happens if the number of special
627 instructions exceeds TIC4X_SPESOP_SIZE. Please increase the variable
630 printf ("optable_special[] is full, please increase TIC4X_SPESOP_SIZE!\n");
635 tic4x_hash_opcode (tic4x_inst_t **optable,
636 tic4x_inst_t **optable_special,
637 const tic4x_inst_t *inst,
638 const unsigned long tic4x_oplevel)
641 int opcode = inst->opcode >> (32 - TIC4X_HASH_SIZE);
642 int opmask = inst->opmask >> (32 - TIC4X_HASH_SIZE);
644 /* Use a TIC4X_HASH_SIZE bit index as a hash index. We should
645 have unique entries so there's no point having a linked list
647 for (j = opcode; j < opmask; j++)
648 if ((j & opmask) == opcode
649 && inst->oplevel & tic4x_oplevel)
652 /* We should only have collisions for synonyms like
654 if (optable[j] != NULL)
655 printf ("Collision at index %d, %s and %s\n",
656 j, optable[j]->name, inst->name);
658 /* Catch those ops that collide with others already inside the
659 hash, and have a opmask greater than the one we use in the
660 hash. Store them in a special-list, that will handle full
661 32-bit INSN, not only the first 11-bit (or so). */
662 if (optable[j] != NULL
663 && inst->opmask & ~(opmask << (32 - TIC4X_HASH_SIZE)))
665 /* Add the instruction already on the list. */
666 tic4x_hash_opcode_special (optable_special, optable[j]);
668 /* Add the new instruction. */
669 tic4x_hash_opcode_special (optable_special, inst);
672 optable[j] = (tic4x_inst_t *) inst;
676 /* Disassemble the instruction in 'instruction'.
677 'pc' should be the address of this instruction, it will
678 be used to print the target address if this is a relative jump or call
679 the disassembled instruction is written to 'info'.
680 The function returns the length of this instruction in words. */
683 tic4x_disassemble (unsigned long pc,
684 unsigned long instruction,
685 struct disassemble_info *info)
687 static tic4x_inst_t **optable = NULL;
688 static tic4x_inst_t **optable_special = NULL;
691 unsigned long tic4x_oplevel;
693 tic4x_version = info->mach;
695 tic4x_oplevel = (IS_CPU_TIC4X (tic4x_version)) ? OP_C4X : 0;
696 tic4x_oplevel |= OP_C3X | OP_LPWR | OP_IDLE2 | OP_ENH;
700 optable = xcalloc (sizeof (tic4x_inst_t *), (1 << TIC4X_HASH_SIZE));
702 optable_special = xcalloc (sizeof (tic4x_inst_t *), TIC4X_SPESOP_SIZE);
704 /* Install opcodes in reverse order so that preferred
705 forms overwrite synonyms. */
706 for (i = tic4x_num_insts - 1; i >= 0; i--)
707 tic4x_hash_opcode (optable, optable_special, &tic4x_insts[i],
710 /* We now need to remove the insn that are special from the
711 "normal" optable, to make the disasm search this extra list
713 for (i = 0; i < TIC4X_SPESOP_SIZE; i++)
714 if (optable_special[i] != NULL)
715 optable[optable_special[i]->opcode >> (32 - TIC4X_HASH_SIZE)] = NULL;
718 /* See if we can pick up any loading of the DP register... */
719 if ((instruction >> 16) == 0x5070 || (instruction >> 16) == 0x1f70)
720 tic4x_dp = EXTRU (instruction, 15, 0);
722 p = optable[instruction >> (32 - TIC4X_HASH_SIZE)];
725 if (((instruction & p->opmask) == p->opcode)
726 && tic4x_print_op (NULL, instruction, p, pc))
727 tic4x_print_op (info, instruction, p, pc);
729 (*info->fprintf_func) (info->stream, "%08lx", instruction);
733 for (i = 0; i<TIC4X_SPESOP_SIZE; i++)
734 if (optable_special[i] != NULL
735 && optable_special[i]->opcode == instruction)
737 (*info->fprintf_func)(info->stream, "%s", optable_special[i]->name);
740 if (i == TIC4X_SPESOP_SIZE)
741 (*info->fprintf_func) (info->stream, "%08lx", instruction);
744 /* Return size of insn in words. */
748 /* The entry point from objdump and gdb. */
750 print_insn_tic4x (bfd_vma memaddr, struct disassemble_info *info)
757 status = (*info->read_memory_func) (memaddr, buffer, 4, info);
760 (*info->memory_error_func) (status, memaddr, info);
765 op = bfd_getl32 (buffer);
766 info->bytes_per_line = 4;
767 info->bytes_per_chunk = 4;
768 info->octets_per_byte = 4;
769 info->display_endian = BFD_ENDIAN_LITTLE;
770 return tic4x_disassemble (pc, op, info) * 4;