1/* Disassembler code for CR16. 2 Copyright (C) 2007-2017 Free Software Foundation, Inc. 3 Contributed by M R Swami Reddy (MR.Swami.Reddy@nsc.com). 4 5 This file is part of GAS, GDB and the GNU binutils. 6 7 This program is free software; you can redistribute it and/or modify it 8 under the terms of the GNU General Public License as published by the 9 Free Software Foundation; either version 3, or (at your option) 10 any later version. 11 12 This program is distributed in the hope that it will be useful, but WITHOUT 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15 more details. 16 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 Foundation, 19 Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 20 21#include "sysdep.h" 22#include "dis-asm.h" 23#include "opcode/cr16.h" 24#include "libiberty.h" 25 26/* String to print when opcode was not matched. */ 27#define ILLEGAL "illegal" 28 /* Escape to 16-bit immediate. */ 29#define ESCAPE_16_BIT 0xB 30 31/* Extract 'n_bits' from 'a' starting from offset 'offs'. */ 32#define EXTRACT(a, offs, n_bits) \ 33 (n_bits == 32 ? (((a) >> (offs)) & 0xffffffffL) \ 34 : (((a) >> (offs)) & ((1 << (n_bits)) -1))) 35 36/* Set Bit Mask - a mask to set all bits starting from offset 'offs'. */ 37#define SBM(offs) ((((1 << (32 - offs)) -1) << (offs))) 38 39typedef struct 40{ 41 dwordU val; 42 int nbits; 43} parameter; 44 45/* Structure to map valid 'cinv' instruction options. */ 46 47typedef struct 48 { 49 /* Cinv printed string. */ 50 char *istr; 51 /* Value corresponding to the string. */ 52 char *ostr; 53 } 54cinv_entry; 55 56/* CR16 'cinv' options mapping. */ 57const cinv_entry cr16_cinvs[] = 58{ 59 {"cinv[i]", "cinv [i]"}, 60 {"cinv[i,u]", "cinv [i,u]"}, 61 {"cinv[d]", "cinv [d]"}, 62 {"cinv[d,u]", "cinv [d,u]"}, 63 {"cinv[d,i]", "cinv [d,i]"}, 64 {"cinv[d,i,u]", "cinv [d,i,u]"} 65}; 66 67/* Number of valid 'cinv' instruction options. */ 68static int NUMCINVS = ARRAY_SIZE (cr16_cinvs); 69 70/* Enum to distinguish different registers argument types. */ 71typedef enum REG_ARG_TYPE 72 { 73 /* General purpose register (r<N>). */ 74 REG_ARG = 0, 75 /*Processor register */ 76 P_ARG, 77 } 78REG_ARG_TYPE; 79 80/* Current opcode table entry we're disassembling. */ 81const inst *instruction; 82/* Current instruction we're disassembling. */ 83ins cr16_currInsn; 84/* The current instruction is read into 3 consecutive words. */ 85wordU cr16_words[3]; 86/* Contains all words in appropriate order. */ 87ULONGLONG cr16_allWords; 88/* Holds the current processed argument number. */ 89int processing_argument_number; 90/* Nonzero means a IMM4 instruction. */ 91int imm4flag; 92/* Nonzero means the instruction's original size is 93 incremented (escape sequence is used). */ 94int size_changed; 95 96 97/* Print the constant expression length. */ 98 99static char * 100print_exp_len (int size) 101{ 102 switch (size) 103 { 104 case 4: 105 case 5: 106 case 6: 107 case 8: 108 case 14: 109 case 16: 110 return ":s"; 111 case 20: 112 case 24: 113 case 32: 114 return ":m"; 115 case 48: 116 return ":l"; 117 default: 118 return ""; 119 } 120} 121 122 123/* Retrieve the number of operands for the current assembled instruction. */ 124 125static int 126get_number_of_operands (void) 127{ 128 int i; 129 130 for (i = 0; instruction->operands[i].op_type && i < MAX_OPERANDS; i++) 131 ; 132 133 return i; 134} 135 136/* Return the bit size for a given operand. */ 137 138static int 139getbits (operand_type op) 140{ 141 if (op < MAX_OPRD) 142 return cr16_optab[op].bit_size; 143 144 return 0; 145} 146 147/* Return the argument type of a given operand. */ 148 149static argtype 150getargtype (operand_type op) 151{ 152 if (op < MAX_OPRD) 153 return cr16_optab[op].arg_type; 154 155 return nullargs; 156} 157 158/* Given a 'CC' instruction constant operand, return its corresponding 159 string. This routine is used when disassembling the 'CC' instruction. */ 160 161static char * 162getccstring (unsigned cc_insn) 163{ 164 return (char *) cr16_b_cond_tab[cc_insn]; 165} 166 167 168/* Given a 'cinv' instruction constant operand, return its corresponding 169 string. This routine is used when disassembling the 'cinv' instruction. */ 170 171static char * 172getcinvstring (const char *str) 173{ 174 const cinv_entry *cinv; 175 176 for (cinv = cr16_cinvs; cinv < (cr16_cinvs + NUMCINVS); cinv++) 177 if (strcmp (cinv->istr, str) == 0) 178 return cinv->ostr; 179 180 return ILLEGAL; 181} 182 183/* Given the trap index in dispatch table, return its name. 184 This routine is used when disassembling the 'excp' instruction. */ 185 186static char * 187gettrapstring (unsigned int trap_index) 188{ 189 const trap_entry *trap; 190 191 for (trap = cr16_traps; trap < cr16_traps + NUMTRAPS; trap++) 192 if (trap->entry == trap_index) 193 return trap->name; 194 195 return ILLEGAL; 196} 197 198/* Given a register enum value, retrieve its name. */ 199 200static char * 201getregname (reg r) 202{ 203 const reg_entry * regentry = cr16_regtab + r; 204 205 if (regentry->type != CR16_R_REGTYPE) 206 return ILLEGAL; 207 208 return regentry->name; 209} 210 211/* Given a register pair enum value, retrieve its name. */ 212 213static char * 214getregpname (reg r) 215{ 216 const reg_entry * regentry = cr16_regptab + r; 217 218 if (regentry->type != CR16_RP_REGTYPE) 219 return ILLEGAL; 220 221 return regentry->name; 222} 223 224/* Given a index register pair enum value, retrieve its name. */ 225 226static char * 227getidxregpname (reg r) 228{ 229 const reg_entry * regentry; 230 231 switch (r) 232 { 233 case 0: r = 0; break; 234 case 1: r = 2; break; 235 case 2: r = 4; break; 236 case 3: r = 6; break; 237 case 4: r = 8; break; 238 case 5: r = 10; break; 239 case 6: r = 3; break; 240 case 7: r = 5; break; 241 default: 242 break; 243 } 244 245 regentry = cr16_regptab + r; 246 247 if (regentry->type != CR16_RP_REGTYPE) 248 return ILLEGAL; 249 250 return regentry->name; 251} 252 253/* Getting a processor register name. */ 254 255static char * 256getprocregname (int reg_index) 257{ 258 const reg_entry *r; 259 260 for (r = cr16_pregtab; r < cr16_pregtab + NUMPREGS; r++) 261 if (r->image == reg_index) 262 return r->name; 263 264 return "ILLEGAL REGISTER"; 265} 266 267/* Getting a processor register name - 32 bit size. */ 268 269static char * 270getprocpregname (int reg_index) 271{ 272 const reg_entry *r; 273 274 for (r = cr16_pregptab; r < cr16_pregptab + NUMPREGPS; r++) 275 if (r->image == reg_index) 276 return r->name; 277 278 return "ILLEGAL REGISTER"; 279} 280 281/* START and END are relating 'cr16_allWords' struct, which is 48 bits size. 282 283 START|--------|END 284 +---------+---------+---------+---------+ 285 | | V | A | L | 286 +---------+---------+---------+---------+ 287 0 16 32 48 288 words [0] [1] [2] */ 289 290static parameter 291makelongparameter (ULONGLONG val, int start, int end) 292{ 293 parameter p; 294 295 p.val = (dwordU) EXTRACT (val, 48 - end, end - start); 296 p.nbits = end - start; 297 return p; 298} 299 300/* Build a mask of the instruction's 'constant' opcode, 301 based on the instruction's printing flags. */ 302 303static unsigned long 304build_mask (void) 305{ 306 unsigned long mask = SBM (instruction->match_bits); 307 308 /* Adjust mask for bcond with 32-bit size instruction. */ 309 if ((IS_INSN_MNEMONIC("b") && instruction->size == 2)) 310 mask = 0xff0f0000; 311 312 return mask; 313} 314 315/* Search for a matching opcode. Return 1 for success, 0 for failure. */ 316 317int 318cr16_match_opcode (void) 319{ 320 unsigned long mask; 321 /* The instruction 'constant' opcode doesn't exceed 32 bits. */ 322 unsigned long doubleWord = (cr16_words[1] 323 + (cr16_words[0] << 16)) & 0xffffffff; 324 325 /* Start searching from end of instruction table. */ 326 instruction = &cr16_instruction[NUMOPCODES - 2]; 327 328 /* Loop over instruction table until a full match is found. */ 329 while (instruction >= cr16_instruction) 330 { 331 mask = build_mask (); 332 /* Adjust mask for bcond with 32-bit size instruction */ 333 if ((IS_INSN_MNEMONIC("b") && instruction->size == 2)) 334 mask = 0xff0f0000; 335 336 if ((doubleWord & mask) == BIN (instruction->match, 337 instruction->match_bits)) 338 return 1; 339 else 340 instruction--; 341 } 342 return 0; 343} 344 345/* Set the proper parameter value for different type of arguments. */ 346 347static void 348make_argument (argument * a, int start_bits) 349{ 350 int inst_bit_size; 351 parameter p; 352 353 if ((instruction->size == 3) && a->size >= 16) 354 inst_bit_size = 48; 355 else 356 inst_bit_size = 32; 357 358 switch (a->type) 359 { 360 case arg_r: 361 p = makelongparameter (cr16_allWords, 362 inst_bit_size - (start_bits + a->size), 363 inst_bit_size - start_bits); 364 a->r = p.val; 365 break; 366 367 case arg_rp: 368 p = makelongparameter (cr16_allWords, 369 inst_bit_size - (start_bits + a->size), 370 inst_bit_size - start_bits); 371 a->rp = p.val; 372 break; 373 374 case arg_pr: 375 p = makelongparameter (cr16_allWords, 376 inst_bit_size - (start_bits + a->size), 377 inst_bit_size - start_bits); 378 a->pr = p.val; 379 break; 380 381 case arg_prp: 382 p = makelongparameter (cr16_allWords, 383 inst_bit_size - (start_bits + a->size), 384 inst_bit_size - start_bits); 385 a->prp = p.val; 386 break; 387 388 case arg_ic: 389 p = makelongparameter (cr16_allWords, 390 inst_bit_size - (start_bits + a->size), 391 inst_bit_size - start_bits); 392 a->constant = p.val; 393 break; 394 395 case arg_cc: 396 p = makelongparameter (cr16_allWords, 397 inst_bit_size - (start_bits + a->size), 398 inst_bit_size - start_bits); 399 400 a->cc = p.val; 401 break; 402 403 case arg_idxr: 404 if ((IS_INSN_MNEMONIC ("cbitb")) 405 || (IS_INSN_MNEMONIC ("sbitb")) 406 || (IS_INSN_MNEMONIC ("tbitb"))) 407 p = makelongparameter (cr16_allWords, 8, 9); 408 else 409 p = makelongparameter (cr16_allWords, 9, 10); 410 a->i_r = p.val; 411 p = makelongparameter (cr16_allWords, 412 inst_bit_size - a->size, inst_bit_size); 413 a->constant = p.val; 414 break; 415 416 case arg_idxrp: 417 p = makelongparameter (cr16_allWords, start_bits + 12, start_bits + 13); 418 a->i_r = p.val; 419 p = makelongparameter (cr16_allWords, start_bits + 13, start_bits + 16); 420 a->rp = p.val; 421 if (inst_bit_size > 32) 422 { 423 p = makelongparameter (cr16_allWords, inst_bit_size - start_bits - 12, 424 inst_bit_size); 425 a->constant = ((p.val & 0xffff) | (p.val >> 8 & 0xf0000)); 426 } 427 else if (instruction->size == 2) 428 { 429 p = makelongparameter (cr16_allWords, inst_bit_size - 22, 430 inst_bit_size); 431 a->constant = (p.val & 0xf) | (((p.val >>20) & 0x3) << 4) 432 | ((p.val >>14 & 0x3) << 6) | (((p.val >>7) & 0x1f) <<7); 433 } 434 else if (instruction->size == 1 && a->size == 0) 435 a->constant = 0; 436 437 break; 438 439 case arg_rbase: 440 p = makelongparameter (cr16_allWords, inst_bit_size, inst_bit_size); 441 a->constant = p.val; 442 p = makelongparameter (cr16_allWords, inst_bit_size - (start_bits + 4), 443 inst_bit_size - start_bits); 444 a->r = p.val; 445 break; 446 447 case arg_cr: 448 p = makelongparameter (cr16_allWords, start_bits + 12, start_bits + 16); 449 a->r = p.val; 450 p = makelongparameter (cr16_allWords, inst_bit_size - 16, inst_bit_size); 451 a->constant = p.val; 452 break; 453 454 case arg_crp: 455 if (instruction->size == 1) 456 p = makelongparameter (cr16_allWords, 12, 16); 457 else 458 p = makelongparameter (cr16_allWords, start_bits + 12, start_bits + 16); 459 a->rp = p.val; 460 461 if (inst_bit_size > 32) 462 { 463 p = makelongparameter (cr16_allWords, inst_bit_size - start_bits - 12, 464 inst_bit_size); 465 a->constant = ((p.val & 0xffff) | (p.val >> 8 & 0xf0000)); 466 } 467 else if (instruction->size == 2) 468 { 469 p = makelongparameter (cr16_allWords, inst_bit_size - 16, 470 inst_bit_size); 471 a->constant = p.val; 472 } 473 else if (instruction->size == 1 && a->size != 0) 474 { 475 p = makelongparameter (cr16_allWords, 4, 8); 476 if (IS_INSN_MNEMONIC ("loadw") 477 || IS_INSN_MNEMONIC ("loadd") 478 || IS_INSN_MNEMONIC ("storw") 479 || IS_INSN_MNEMONIC ("stord")) 480 a->constant = (p.val * 2); 481 else 482 a->constant = p.val; 483 } 484 else /* below case for 0x0(reg pair) */ 485 a->constant = 0; 486 487 break; 488 489 case arg_c: 490 491 if ((IS_INSN_TYPE (BRANCH_INS)) 492 || (IS_INSN_MNEMONIC ("bal")) 493 || (IS_INSN_TYPE (CSTBIT_INS)) 494 || (IS_INSN_TYPE (LD_STOR_INS))) 495 { 496 switch (a->size) 497 { 498 case 8 : 499 p = makelongparameter (cr16_allWords, 0, start_bits); 500 a->constant = ((((p.val&0xf00)>>4)) | (p.val&0xf)); 501 break; 502 503 case 24: 504 if (instruction->size == 3) 505 { 506 p = makelongparameter (cr16_allWords, 16, inst_bit_size); 507 a->constant = ((((p.val>>16)&0xf) << 20) 508 | (((p.val>>24)&0xf) << 16) 509 | (p.val & 0xffff)); 510 } 511 else if (instruction->size == 2) 512 { 513 p = makelongparameter (cr16_allWords, 8, inst_bit_size); 514 a->constant = p.val; 515 } 516 break; 517 518 default: 519 p = makelongparameter (cr16_allWords, 520 inst_bit_size - (start_bits + a->size), 521 inst_bit_size - start_bits); 522 a->constant = p.val; 523 break; 524 } 525 } 526 else 527 { 528 p = makelongparameter (cr16_allWords, 529 inst_bit_size - (start_bits + a->size), 530 inst_bit_size - start_bits); 531 a->constant = p.val; 532 } 533 break; 534 535 default: 536 break; 537 } 538} 539 540/* Print a single argument. */ 541 542static void 543print_arg (argument *a, bfd_vma memaddr, struct disassemble_info *info) 544{ 545 LONGLONG longdisp, mask; 546 int sign_flag = 0; 547 int relative = 0; 548 bfd_vma number; 549 PTR stream = info->stream; 550 fprintf_ftype func = info->fprintf_func; 551 552 switch (a->type) 553 { 554 case arg_r: 555 func (stream, "%s", getregname (a->r)); 556 break; 557 558 case arg_rp: 559 func (stream, "%s", getregpname (a->rp)); 560 break; 561 562 case arg_pr: 563 func (stream, "%s", getprocregname (a->pr)); 564 break; 565 566 case arg_prp: 567 func (stream, "%s", getprocpregname (a->prp)); 568 break; 569 570 case arg_cc: 571 func (stream, "%s", getccstring (a->cc)); 572 func (stream, "%s", "\t"); 573 break; 574 575 case arg_ic: 576 if (IS_INSN_MNEMONIC ("excp")) 577 { 578 func (stream, "%s", gettrapstring (a->constant)); 579 break; 580 } 581 else if ((IS_INSN_TYPE (ARITH_INS) || IS_INSN_TYPE (ARITH_BYTE_INS)) 582 && ((instruction->size == 1) && (a->constant == 9))) 583 func (stream, "$%d", -1); 584 else if (INST_HAS_REG_LIST) 585 func (stream, "$0x%lx", a->constant +1); 586 else if (IS_INSN_TYPE (SHIFT_INS)) 587 { 588 longdisp = a->constant; 589 mask = ((LONGLONG)1 << a->size) - 1; 590 if (longdisp & ((LONGLONG)1 << (a->size -1))) 591 { 592 sign_flag = 1; 593 longdisp = ~(longdisp) + 1; 594 } 595 a->constant = (unsigned long int) (longdisp & mask); 596 func (stream, "$%d", ((int)(sign_flag ? -a->constant : 597 a->constant))); 598 } 599 else 600 func (stream, "$0x%lx", a->constant); 601 switch (a->size) 602 { 603 case 4 : case 5 : case 6 : case 8 : 604 func (stream, "%s", ":s"); break; 605 case 16 : case 20 : func (stream, "%s", ":m"); break; 606 case 24 : case 32 : func (stream, "%s", ":l"); break; 607 default: break; 608 } 609 break; 610 611 case arg_idxr: 612 if (a->i_r == 0) func (stream, "[r12]"); 613 if (a->i_r == 1) func (stream, "[r13]"); 614 func (stream, "0x%lx", a->constant); 615 func (stream, "%s", print_exp_len (instruction->size * 16)); 616 break; 617 618 case arg_idxrp: 619 if (a->i_r == 0) func (stream, "[r12]"); 620 if (a->i_r == 1) func (stream, "[r13]"); 621 func (stream, "0x%lx", a->constant); 622 func (stream, "%s", print_exp_len (instruction->size * 16)); 623 func (stream, "%s", getidxregpname (a->rp)); 624 break; 625 626 case arg_rbase: 627 func (stream, "(%s)", getregname (a->r)); 628 break; 629 630 case arg_cr: 631 func (stream, "0x%lx", a->constant); 632 func (stream, "%s", print_exp_len (instruction->size * 16)); 633 func (stream, "(%s)", getregname (a->r)); 634 break; 635 636 case arg_crp: 637 func (stream, "0x%lx", a->constant); 638 func (stream, "%s", print_exp_len (instruction->size * 16)); 639 func (stream, "%s", getregpname (a->rp)); 640 break; 641 642 case arg_c: 643 /*Removed the *2 part as because implicit zeros are no more required. 644 Have to fix this as this needs a bit of extension in terms of branch 645 instructions. */ 646 if (IS_INSN_TYPE (BRANCH_INS) || IS_INSN_MNEMONIC ("bal")) 647 { 648 relative = 1; 649 longdisp = a->constant; 650 /* REVISIT: To sync with WinIDEA and CR16 4.1tools, the below 651 line commented */ 652 /* longdisp <<= 1; */ 653 mask = ((LONGLONG)1 << a->size) - 1; 654 switch (a->size) 655 { 656 case 8 : 657 { 658 longdisp <<= 1; 659 if (longdisp & ((LONGLONG)1 << a->size)) 660 { 661 sign_flag = 1; 662 longdisp = ~(longdisp) + 1; 663 } 664 break; 665 } 666 case 16 : 667 case 24 : 668 { 669 if (longdisp & 1) 670 { 671 sign_flag = 1; 672 longdisp = ~(longdisp) + 1; 673 } 674 break; 675 } 676 default: 677 func (stream, "Wrong offset used in branch/bal instruction"); 678 break; 679 } 680 a->constant = (unsigned long int) (longdisp & mask); 681 } 682 /* For branch Neq instruction it is 2*offset + 2. */ 683 else if (IS_INSN_TYPE (BRANCH_NEQ_INS)) 684 a->constant = 2 * a->constant + 2; 685 686 if ((!IS_INSN_TYPE (CSTBIT_INS)) && (!IS_INSN_TYPE (LD_STOR_INS))) 687 (sign_flag) ? func (stream, "%s", "*-"): func (stream, "%s","*+"); 688 689 /* PR 10173: Avoid printing the 0x prefix twice. */ 690 if (info->symtab_size > 0) 691 func (stream, "%s", "0x"); 692 number = ((relative ? memaddr : 0) + 693 (sign_flag ? ((- a->constant) & 0xffffffe) : a->constant)); 694 695 (*info->print_address_func) ((number & ((1 << 24) - 1)), info); 696 697 func (stream, "%s", print_exp_len (instruction->size * 16)); 698 break; 699 700 default: 701 break; 702 } 703} 704 705/* Print all the arguments of CURRINSN instruction. */ 706 707static void 708print_arguments (ins *currentInsn, bfd_vma memaddr, struct disassemble_info *info) 709{ 710 int i; 711 712 /* For "pop/push/popret RA instruction only. */ 713 if ((IS_INSN_MNEMONIC ("pop") 714 || (IS_INSN_MNEMONIC ("popret") 715 || (IS_INSN_MNEMONIC ("push")))) 716 && currentInsn->nargs == 1) 717 { 718 info->fprintf_func (info->stream, "RA"); 719 return; 720 } 721 722 for (i = 0; i < currentInsn->nargs; i++) 723 { 724 processing_argument_number = i; 725 726 /* For "bal (ra), disp17" instruction only. */ 727 if ((IS_INSN_MNEMONIC ("bal")) && (i == 0) && instruction->size == 2) 728 { 729 info->fprintf_func (info->stream, "(ra),"); 730 continue; 731 } 732 733 if ((INST_HAS_REG_LIST) && (i == 2)) 734 info->fprintf_func (info->stream, "RA"); 735 else 736 print_arg (¤tInsn->arg[i], memaddr, info); 737 738 if ((i != currentInsn->nargs - 1) && (!IS_INSN_MNEMONIC ("b"))) 739 info->fprintf_func (info->stream, ","); 740 } 741} 742 743/* Build the instruction's arguments. */ 744 745void 746cr16_make_instruction (void) 747{ 748 int i; 749 unsigned int shift; 750 751 for (i = 0; i < cr16_currInsn.nargs; i++) 752 { 753 argument a; 754 755 memset (&a, 0, sizeof (a)); 756 a.type = getargtype (instruction->operands[i].op_type); 757 a.size = getbits (instruction->operands[i].op_type); 758 shift = instruction->operands[i].shift; 759 760 make_argument (&a, shift); 761 cr16_currInsn.arg[i] = a; 762 } 763 764 /* Calculate instruction size (in bytes). */ 765 cr16_currInsn.size = instruction->size + (size_changed ? 1 : 0); 766 /* Now in bits. */ 767 cr16_currInsn.size *= 2; 768} 769 770/* Retrieve a single word from a given memory address. */ 771 772static wordU 773get_word_at_PC (bfd_vma memaddr, struct disassemble_info *info) 774{ 775 bfd_byte buffer[4]; 776 int status; 777 wordU insn = 0; 778 779 status = info->read_memory_func (memaddr, buffer, 2, info); 780 781 if (status == 0) 782 insn = (wordU) bfd_getl16 (buffer); 783 784 return insn; 785} 786 787/* Retrieve multiple words (3) from a given memory address. */ 788 789static void 790get_words_at_PC (bfd_vma memaddr, struct disassemble_info *info) 791{ 792 int i; 793 bfd_vma mem; 794 795 for (i = 0, mem = memaddr; i < 3; i++, mem += 2) 796 cr16_words[i] = get_word_at_PC (mem, info); 797 798 cr16_allWords = ((ULONGLONG) cr16_words[0] << 32) 799 + ((unsigned long) cr16_words[1] << 16) + cr16_words[2]; 800} 801 802/* Prints the instruction by calling print_arguments after proper matching. */ 803 804int 805print_insn_cr16 (bfd_vma memaddr, struct disassemble_info *info) 806{ 807 int is_decoded; /* Nonzero means instruction has a match. */ 808 809 /* Initialize global variables. */ 810 imm4flag = 0; 811 size_changed = 0; 812 813 /* Retrieve the encoding from current memory location. */ 814 get_words_at_PC (memaddr, info); 815 /* Find a matching opcode in table. */ 816 is_decoded = cr16_match_opcode (); 817 /* If found, print the instruction's mnemonic and arguments. */ 818 if (is_decoded > 0 && (cr16_words[0] != 0 || cr16_words[1] != 0)) 819 { 820 if (strneq (instruction->mnemonic, "cinv", 4)) 821 info->fprintf_func (info->stream,"%s", getcinvstring (instruction->mnemonic)); 822 else 823 info->fprintf_func (info->stream, "%s", instruction->mnemonic); 824 825 if (((cr16_currInsn.nargs = get_number_of_operands ()) != 0) 826 && ! (IS_INSN_MNEMONIC ("b"))) 827 info->fprintf_func (info->stream, "\t"); 828 cr16_make_instruction (); 829 /* For push/pop/pushrtn with RA instructions. */ 830 if ((INST_HAS_REG_LIST) && ((cr16_words[0] >> 7) & 0x1)) 831 cr16_currInsn.nargs +=1; 832 print_arguments (&cr16_currInsn, memaddr, info); 833 return cr16_currInsn.size; 834 } 835 836 /* No match found. */ 837 info->fprintf_func (info->stream,"%s ",ILLEGAL); 838 return 2; 839} 840