| 1 | /* Disassembler code for CR16. |
| 2 | Copyright (C) 2007-2016 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 | |
| 39 | typedef struct |
| 40 | { |
| 41 | dwordU val; |
| 42 | int nbits; |
| 43 | } parameter; |
| 44 | |
| 45 | /* Structure to map valid 'cinv' instruction options. */ |
| 46 | |
| 47 | typedef struct |
| 48 | { |
| 49 | /* Cinv printed string. */ |
| 50 | char *istr; |
| 51 | /* Value corresponding to the string. */ |
| 52 | char *ostr; |
| 53 | } |
| 54 | cinv_entry; |
| 55 | |
| 56 | /* CR16 'cinv' options mapping. */ |
| 57 | const 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. */ |
| 68 | static int NUMCINVS = ARRAY_SIZE (cr16_cinvs); |
| 69 | |
| 70 | /* Enum to distinguish different registers argument types. */ |
| 71 | typedef enum REG_ARG_TYPE |
| 72 | { |
| 73 | /* General purpose register (r<N>). */ |
| 74 | REG_ARG = 0, |
| 75 | /*Processor register */ |
| 76 | P_ARG, |
| 77 | } |
| 78 | REG_ARG_TYPE; |
| 79 | |
| 80 | /* Current opcode table entry we're disassembling. */ |
| 81 | const inst *instruction; |
| 82 | /* Current instruction we're disassembling. */ |
| 83 | ins cr16_currInsn; |
| 84 | /* The current instruction is read into 3 consecutive words. */ |
| 85 | wordU cr16_words[3]; |
| 86 | /* Contains all words in appropriate order. */ |
| 87 | ULONGLONG cr16_allWords; |
| 88 | /* Holds the current processed argument number. */ |
| 89 | int processing_argument_number; |
| 90 | /* Nonzero means a IMM4 instruction. */ |
| 91 | int imm4flag; |
| 92 | /* Nonzero means the instruction's original size is |
| 93 | incremented (escape sequence is used). */ |
| 94 | int size_changed; |
| 95 | |
| 96 | |
| 97 | /* Print the constant expression length. */ |
| 98 | |
| 99 | static char * |
| 100 | print_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 | |
| 125 | static int |
| 126 | get_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 | |
| 138 | static int |
| 139 | getbits (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 | |
| 149 | static argtype |
| 150 | getargtype (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 | |
| 161 | static char * |
| 162 | getccstring (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 | |
| 171 | static char * |
| 172 | getcinvstring (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 | |
| 186 | static char * |
| 187 | gettrapstring (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 | |
| 200 | static char * |
| 201 | getregname (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 | |
| 213 | static char * |
| 214 | getregpname (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 | |
| 226 | static char * |
| 227 | getidxregpname (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 | |
| 255 | static char * |
| 256 | getprocregname (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 | |
| 269 | static char * |
| 270 | getprocpregname (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 | |
| 290 | static parameter |
| 291 | makelongparameter (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 | |
| 303 | static unsigned long |
| 304 | build_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 | |
| 317 | int |
| 318 | cr16_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 | |
| 347 | static void |
| 348 | make_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 | |
| 542 | static void |
| 543 | print_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 | |
| 707 | static void |
| 708 | print_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 | |
| 745 | void |
| 746 | cr16_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 | |
| 772 | static wordU |
| 773 | get_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 | |
| 789 | static void |
| 790 | get_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 | |
| 804 | int |
| 805 | print_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 | } |