1 /* Print instructions for the Texas TMS320C[34]X, for GDB and GNU Binutils.
3 Copyright 2002, 2003, 2005 Free Software Foundation, Inc.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
23 #include "libiberty.h"
25 #include "opcode/tic4x.h"
29 #define TIC4X_HASH_SIZE 11 /* 11 (bits) and above should give unique entries. */
30 #define TIC4X_SPESOP_SIZE 8 /* Max 8. ops for special instructions. */
51 static int tic4x_version = 0;
52 static int tic4x_dp = 0;
55 tic4x_pc_offset (unsigned int op)
57 /* Determine the PC offset for a C[34]x instruction.
58 This could be simplified using some boolean algebra
59 but at the expense of readability. */
63 case 0x62: /* call (C4x) */
64 case 0x64: /* rptb (C4x) */
68 case 0x65: /* rptbd (C4x) */
77 switch ((op & 0xffe00000) >> 20)
80 case 0x720: /* callB */
81 case 0x740: /* trapB */
85 case 0x6a6: /* bBat */
86 case 0x6aa: /* bBaf */
87 case 0x722: /* lajB */
88 case 0x748: /* latB */
89 case 0x798: /* rptbd */
96 switch ((op & 0xfe200000) >> 20)
101 case 0x6e2: /* dbBd */
112 tic4x_print_char (struct disassemble_info * info, char ch)
115 (*info->fprintf_func) (info->stream, "%c", ch);
120 tic4x_print_str (struct disassemble_info *info, char *str)
123 (*info->fprintf_func) (info->stream, "%s", str);
128 tic4x_print_register (struct disassemble_info *info, unsigned long regno)
130 static tic4x_register_t ** registertable = NULL;
133 if (registertable == NULL)
135 registertable = xmalloc (sizeof (tic4x_register_t *) * REG_TABLE_SIZE);
136 for (i = 0; i < tic3x_num_registers; i++)
137 registertable[tic3x_registers[i].regno] = (tic4x_register_t *) (tic3x_registers + i);
138 if (IS_CPU_TIC4X (tic4x_version))
140 /* Add C4x additional registers, overwriting
141 any C3x registers if necessary. */
142 for (i = 0; i < tic4x_num_registers; i++)
143 registertable[tic4x_registers[i].regno] =
144 (tic4x_register_t *)(tic4x_registers + i);
147 if ((int) regno > (IS_CPU_TIC4X (tic4x_version) ? TIC4X_REG_MAX : TIC3X_REG_MAX))
150 (*info->fprintf_func) (info->stream, "%s", registertable[regno]->name);
155 tic4x_print_addr (struct disassemble_info *info, unsigned long addr)
158 (*info->print_address_func)(addr, info);
163 tic4x_print_relative (struct disassemble_info *info,
166 unsigned long opcode)
168 return tic4x_print_addr (info, pc + offset + tic4x_pc_offset (opcode));
172 tic4x_print_direct (struct disassemble_info *info, unsigned long arg)
176 (*info->fprintf_func) (info->stream, "@");
177 tic4x_print_addr (info, arg + (tic4x_dp << 16));
182 /* FIXME: make the floating point stuff not rely on host
183 floating point arithmetic. */
186 tic4x_print_ftoa (unsigned int val, FILE *stream, fprintf_ftype pfunc)
193 e = EXTRS (val, 31, 24); /* Exponent. */
196 s = EXTRU (val, 23, 23); /* Sign bit. */
197 f = EXTRU (val, 22, 0); /* Mantissa. */
202 num = f / (double)(1 << 23);
203 num = ldexp (num, e);
205 (*pfunc)(stream, "%.9g", num);
210 tic4x_print_immed (struct disassemble_info *info,
225 (*info->fprintf_func) (info->stream, "%ld", (long) arg);
230 (*info->fprintf_func) (info->stream, "%lu", arg);
234 e = EXTRS (arg, 15, 12);
237 s = EXTRU (arg, 11, 11);
238 f = EXTRU (arg, 10, 0);
243 num = f / (double)(1 << 11);
244 num = ldexp (num, e);
246 (*info->fprintf_func) (info->stream, "%f", num);
249 e = EXTRS (arg, 31, 24);
252 s = EXTRU (arg, 23, 23);
253 f = EXTRU (arg, 22, 0);
258 num = f / (double)(1 << 23);
259 num = ldexp (num, e);
261 (*info->fprintf_func) (info->stream, "%f", num);
268 tic4x_print_cond (struct disassemble_info *info, unsigned int cond)
270 static tic4x_cond_t **condtable = NULL;
273 if (condtable == NULL)
275 condtable = xmalloc (sizeof (tic4x_cond_t *) * 32);
276 for (i = 0; i < tic4x_num_conds; i++)
277 condtable[tic4x_conds[i].cond] = (tic4x_cond_t *)(tic4x_conds + i);
279 if (cond > 31 || condtable[cond] == NULL)
282 (*info->fprintf_func) (info->stream, "%s", condtable[cond]->name);
287 tic4x_print_indirect (struct disassemble_info *info,
301 case INDIRECT_TIC4X: /* *+ARn(disp) */
302 disp = EXTRU (arg, 7, 3);
303 aregno = EXTRU (arg, 2, 0) + REG_AR0;
308 aregno = EXTRU (arg, 2, 0) + REG_AR0;
309 modn = EXTRU (arg, 7, 3);
312 disp = EXTRU (arg, 7, 0);
313 aregno = EXTRU (arg, 10, 8) + REG_AR0;
314 modn = EXTRU (arg, 15, 11);
315 if (modn > 7 && disp != 0)
319 (*info->fprintf_func)(info->stream, "# internal error: Unknown indirect type %d", type);
322 if (modn > TIC3X_MODN_MAX)
324 a = tic4x_indirects[modn].name;
330 tic4x_print_register (info, aregno);
333 tic4x_print_immed (info, IMMED_UINT, disp);
336 tic4x_print_str (info, "ir0");
339 tic4x_print_str (info, "ir1");
342 tic4x_print_char (info, *a);
351 tic4x_print_op (struct disassemble_info *info,
352 unsigned long instruction,
358 char *parallel = NULL;
360 /* Print instruction name. */
362 while (*s && parallel == NULL)
367 if (! tic4x_print_cond (info, EXTRU (instruction, 20, 16)))
371 if (! tic4x_print_cond (info, EXTRU (instruction, 27, 23)))
375 parallel = s + 1; /* Skip past `_' in name. */
378 tic4x_print_char (info, *s);
384 /* Print arguments. */
387 tic4x_print_char (info, ' ');
393 case '*': /* Indirect 0--15. */
394 if (! tic4x_print_indirect (info, INDIRECT_LONG,
395 EXTRU (instruction, 15, 0)))
399 case '#': /* Only used for ldp, ldpk. */
400 tic4x_print_immed (info, IMMED_UINT, EXTRU (instruction, 15, 0));
403 case '@': /* Direct 0--15. */
404 tic4x_print_direct (info, EXTRU (instruction, 15, 0));
407 case 'A': /* Address register 24--22. */
408 if (! tic4x_print_register (info, EXTRU (instruction, 24, 22) +
413 case 'B': /* 24-bit unsigned int immediate br(d)/call/rptb
415 if (IS_CPU_TIC4X (tic4x_version))
416 tic4x_print_relative (info, pc, EXTRS (instruction, 23, 0),
419 tic4x_print_addr (info, EXTRU (instruction, 23, 0));
422 case 'C': /* Indirect (short C4x) 0--7. */
423 if (! IS_CPU_TIC4X (tic4x_version))
425 if (! tic4x_print_indirect (info, INDIRECT_TIC4X,
426 EXTRU (instruction, 7, 0)))
431 /* Cockup if get here... */
434 case 'E': /* Register 0--7. */
436 if (! tic4x_print_register (info, EXTRU (instruction, 7, 0)))
440 case 'F': /* 16-bit float immediate 0--15. */
441 tic4x_print_immed (info, IMMED_SFLOAT,
442 EXTRU (instruction, 15, 0));
445 case 'i': /* Extended indirect 0--7. */
446 if (EXTRU (instruction, 7, 5) == 7)
448 if (!tic4x_print_register (info, EXTRU (instruction, 4, 0)))
454 case 'I': /* Indirect (short) 0--7. */
455 if (! tic4x_print_indirect (info, INDIRECT_SHORT,
456 EXTRU (instruction, 7, 0)))
460 case 'j': /* Extended indirect 8--15 */
461 if (EXTRU (instruction, 15, 13) == 7)
463 if (! tic4x_print_register (info, EXTRU (instruction, 12, 8)))
468 case 'J': /* Indirect (short) 8--15. */
469 if (! tic4x_print_indirect (info, INDIRECT_SHORT,
470 EXTRU (instruction, 15, 8)))
474 case 'G': /* Register 8--15. */
476 if (! tic4x_print_register (info, EXTRU (instruction, 15, 8)))
480 case 'H': /* Register 16--18. */
481 if (! tic4x_print_register (info, EXTRU (instruction, 18, 16)))
485 case 'K': /* Register 19--21. */
486 if (! tic4x_print_register (info, EXTRU (instruction, 21, 19)))
490 case 'L': /* Register 22--24. */
491 if (! tic4x_print_register (info, EXTRU (instruction, 24, 22)))
495 case 'M': /* Register 22--22. */
496 tic4x_print_register (info, EXTRU (instruction, 22, 22) + REG_R2);
499 case 'N': /* Register 23--23. */
500 tic4x_print_register (info, EXTRU (instruction, 23, 23) + REG_R0);
503 case 'O': /* Indirect (short C4x) 8--15. */
504 if (! IS_CPU_TIC4X (tic4x_version))
506 if (! tic4x_print_indirect (info, INDIRECT_TIC4X,
507 EXTRU (instruction, 15, 8)))
511 case 'P': /* Displacement 0--15 (used by Bcond and BcondD). */
512 tic4x_print_relative (info, pc, EXTRS (instruction, 15, 0),
516 case 'Q': /* Register 0--15. */
518 if (! tic4x_print_register (info, EXTRU (instruction, 15, 0)))
522 case 'R': /* Register 16--20. */
524 if (! tic4x_print_register (info, EXTRU (instruction, 20, 16)))
528 case 'S': /* 16-bit signed immediate 0--15. */
529 tic4x_print_immed (info, IMMED_SINT,
530 EXTRS (instruction, 15, 0));
533 case 'T': /* 5-bit signed immediate 16--20 (C4x stik). */
534 if (! IS_CPU_TIC4X (tic4x_version))
536 if (! tic4x_print_immed (info, IMMED_SUINT,
537 EXTRU (instruction, 20, 16)))
541 case 'U': /* 16-bit unsigned int immediate 0--15. */
542 tic4x_print_immed (info, IMMED_SUINT, EXTRU (instruction, 15, 0));
545 case 'V': /* 5/9-bit unsigned vector 0--4/8. */
546 tic4x_print_immed (info, IMMED_SUINT,
547 IS_CPU_TIC4X (tic4x_version) ?
548 EXTRU (instruction, 8, 0) :
549 EXTRU (instruction, 4, 0) & ~0x20);
552 case 'W': /* 8-bit signed immediate 0--7. */
553 if (! IS_CPU_TIC4X (tic4x_version))
555 tic4x_print_immed (info, IMMED_SINT, EXTRS (instruction, 7, 0));
558 case 'X': /* Expansion register 4--0. */
559 val = EXTRU (instruction, 4, 0) + REG_IVTP;
560 if (val < REG_IVTP || val > REG_TVTP)
562 if (! tic4x_print_register (info, val))
566 case 'Y': /* Address register 16--20. */
567 val = EXTRU (instruction, 20, 16);
568 if (val < REG_AR0 || val > REG_SP)
570 if (! tic4x_print_register (info, val))
574 case 'Z': /* Expansion register 16--20. */
575 val = EXTRU (instruction, 20, 16) + REG_IVTP;
576 if (val < REG_IVTP || val > REG_TVTP)
578 if (! tic4x_print_register (info, val))
582 case '|': /* Parallel instruction. */
583 tic4x_print_str (info, " || ");
584 tic4x_print_str (info, parallel);
585 tic4x_print_char (info, ' ');
589 tic4x_print_char (info, ',');
593 tic4x_print_char (info, *s);
602 tic4x_hash_opcode_special (tic4x_inst_t **optable_special,
603 const tic4x_inst_t *inst)
607 for (i = 0;i < TIC4X_SPESOP_SIZE; i++)
608 if (optable_special[i] != NULL
609 && optable_special[i]->opcode == inst->opcode)
611 /* Collision (we have it already) - overwrite. */
612 optable_special[i] = (tic4x_inst_t *) inst;
616 for (i = 0; i < TIC4X_SPESOP_SIZE; i++)
617 if (optable_special[i] == NULL)
619 /* Add the new opcode. */
620 optable_special[i] = (tic4x_inst_t *) inst;
624 /* This should never occur. This happens if the number of special
625 instructions exceeds TIC4X_SPESOP_SIZE. Please increase the variable
628 printf ("optable_special[] is full, please increase TIC4X_SPESOP_SIZE!\n");
633 tic4x_hash_opcode (tic4x_inst_t **optable,
634 tic4x_inst_t **optable_special,
635 const tic4x_inst_t *inst,
636 const unsigned long tic4x_oplevel)
639 int opcode = inst->opcode >> (32 - TIC4X_HASH_SIZE);
640 int opmask = inst->opmask >> (32 - TIC4X_HASH_SIZE);
642 /* Use a TIC4X_HASH_SIZE bit index as a hash index. We should
643 have unique entries so there's no point having a linked list
645 for (j = opcode; j < opmask; j++)
646 if ((j & opmask) == opcode
647 && inst->oplevel & tic4x_oplevel)
650 /* We should only have collisions for synonyms like
652 if (optable[j] != NULL)
653 printf ("Collision at index %d, %s and %s\n",
654 j, optable[j]->name, inst->name);
656 /* Catch those ops that collide with others already inside the
657 hash, and have a opmask greater than the one we use in the
658 hash. Store them in a special-list, that will handle full
659 32-bit INSN, not only the first 11-bit (or so). */
660 if (optable[j] != NULL
661 && inst->opmask & ~(opmask << (32 - TIC4X_HASH_SIZE)))
663 /* Add the instruction already on the list. */
664 tic4x_hash_opcode_special (optable_special, optable[j]);
666 /* Add the new instruction. */
667 tic4x_hash_opcode_special (optable_special, inst);
670 optable[j] = (tic4x_inst_t *) inst;
674 /* Disassemble the instruction in 'instruction'.
675 'pc' should be the address of this instruction, it will
676 be used to print the target address if this is a relative jump or call
677 the disassembled instruction is written to 'info'.
678 The function returns the length of this instruction in words. */
681 tic4x_disassemble (unsigned long pc,
682 unsigned long instruction,
683 struct disassemble_info *info)
685 static tic4x_inst_t **optable = NULL;
686 static tic4x_inst_t **optable_special = NULL;
689 unsigned long tic4x_oplevel;
691 tic4x_version = info->mach;
693 tic4x_oplevel = (IS_CPU_TIC4X (tic4x_version)) ? OP_C4X : 0;
694 tic4x_oplevel |= OP_C3X | OP_LPWR | OP_IDLE2 | OP_ENH;
698 optable = xcalloc (sizeof (tic4x_inst_t *), (1 << TIC4X_HASH_SIZE));
700 optable_special = xcalloc (sizeof (tic4x_inst_t *), TIC4X_SPESOP_SIZE);
702 /* Install opcodes in reverse order so that preferred
703 forms overwrite synonyms. */
704 for (i = tic4x_num_insts - 1; i >= 0; i--)
705 tic4x_hash_opcode (optable, optable_special, &tic4x_insts[i],
708 /* We now need to remove the insn that are special from the
709 "normal" optable, to make the disasm search this extra list
711 for (i = 0; i < TIC4X_SPESOP_SIZE; i++)
712 if (optable_special[i] != NULL)
713 optable[optable_special[i]->opcode >> (32 - TIC4X_HASH_SIZE)] = NULL;
716 /* See if we can pick up any loading of the DP register... */
717 if ((instruction >> 16) == 0x5070 || (instruction >> 16) == 0x1f70)
718 tic4x_dp = EXTRU (instruction, 15, 0);
720 p = optable[instruction >> (32 - TIC4X_HASH_SIZE)];
723 if (((instruction & p->opmask) == p->opcode)
724 && tic4x_print_op (NULL, instruction, p, pc))
725 tic4x_print_op (info, instruction, p, pc);
727 (*info->fprintf_func) (info->stream, "%08lx", instruction);
731 for (i = 0; i<TIC4X_SPESOP_SIZE; i++)
732 if (optable_special[i] != NULL
733 && optable_special[i]->opcode == instruction)
735 (*info->fprintf_func)(info->stream, "%s", optable_special[i]->name);
738 if (i == TIC4X_SPESOP_SIZE)
739 (*info->fprintf_func) (info->stream, "%08lx", instruction);
742 /* Return size of insn in words. */
746 /* The entry point from objdump and gdb. */
748 print_insn_tic4x (bfd_vma memaddr, struct disassemble_info *info)
755 status = (*info->read_memory_func) (memaddr, buffer, 4, info);
758 (*info->memory_error_func) (status, memaddr, info);
763 op = bfd_getl32 (buffer);
764 info->bytes_per_line = 4;
765 info->bytes_per_chunk = 4;
766 info->octets_per_byte = 4;
767 info->display_endian = BFD_ENDIAN_LITTLE;
768 return tic4x_disassemble (pc, op, info) * 4;