| 1 | /* tc-d10v.c -- Assembler code for the Mitsubishi D10V |
| 2 | Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2006, 2007 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GAS, the GNU Assembler. |
| 6 | |
| 7 | GAS 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, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | GAS 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. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GAS; see the file COPYING. If not, write to |
| 19 | the Free Software Foundation, 51 Franklin Street - Fifth Floor, |
| 20 | Boston, MA 02110-1301, USA. */ |
| 21 | |
| 22 | #include "as.h" |
| 23 | #include "safe-ctype.h" |
| 24 | #include "subsegs.h" |
| 25 | #include "opcode/d10v.h" |
| 26 | #include "elf/ppc.h" |
| 27 | |
| 28 | const char comment_chars[] = ";"; |
| 29 | const char line_comment_chars[] = "#"; |
| 30 | const char line_separator_chars[] = ""; |
| 31 | const char *md_shortopts = "O"; |
| 32 | const char EXP_CHARS[] = "eE"; |
| 33 | const char FLT_CHARS[] = "dD"; |
| 34 | |
| 35 | int Optimizing = 0; |
| 36 | |
| 37 | #define AT_WORD_P(X) ((X)->X_op == O_right_shift \ |
| 38 | && (X)->X_op_symbol != NULL \ |
| 39 | && symbol_constant_p ((X)->X_op_symbol) \ |
| 40 | && S_GET_VALUE ((X)->X_op_symbol) == AT_WORD_RIGHT_SHIFT) |
| 41 | #define AT_WORD_RIGHT_SHIFT 2 |
| 42 | |
| 43 | /* Fixups. */ |
| 44 | #define MAX_INSN_FIXUPS 5 |
| 45 | |
| 46 | struct d10v_fixup |
| 47 | { |
| 48 | expressionS exp; |
| 49 | int operand; |
| 50 | int pcrel; |
| 51 | int size; |
| 52 | bfd_reloc_code_real_type reloc; |
| 53 | }; |
| 54 | |
| 55 | typedef struct _fixups |
| 56 | { |
| 57 | int fc; |
| 58 | struct d10v_fixup fix[MAX_INSN_FIXUPS]; |
| 59 | struct _fixups *next; |
| 60 | } Fixups; |
| 61 | |
| 62 | static Fixups FixUps[2]; |
| 63 | static Fixups *fixups; |
| 64 | |
| 65 | static int do_not_ignore_hash = 0; |
| 66 | |
| 67 | typedef int packing_type; |
| 68 | #define PACK_UNSPEC (0) /* Packing order not specified. */ |
| 69 | #define PACK_PARALLEL (1) /* "||" */ |
| 70 | #define PACK_LEFT_RIGHT (2) /* "->" */ |
| 71 | #define PACK_RIGHT_LEFT (3) /* "<-" */ |
| 72 | static packing_type etype = PACK_UNSPEC; /* Used by d10v_cleanup. */ |
| 73 | |
| 74 | /* TRUE if instruction swapping warnings should be inhibited. |
| 75 | --nowarnswap. */ |
| 76 | static bfd_boolean flag_warn_suppress_instructionswap; |
| 77 | |
| 78 | /* TRUE if instruction packing should be performed when --gstabs is specified. |
| 79 | --gstabs-packing, --no-gstabs-packing. */ |
| 80 | static bfd_boolean flag_allow_gstabs_packing = 1; |
| 81 | |
| 82 | /* Local functions. */ |
| 83 | |
| 84 | enum options |
| 85 | { |
| 86 | OPTION_NOWARNSWAP = OPTION_MD_BASE, |
| 87 | OPTION_GSTABSPACKING, |
| 88 | OPTION_NOGSTABSPACKING |
| 89 | }; |
| 90 | |
| 91 | struct option md_longopts[] = |
| 92 | { |
| 93 | {"nowarnswap", no_argument, NULL, OPTION_NOWARNSWAP}, |
| 94 | {"gstabspacking", no_argument, NULL, OPTION_GSTABSPACKING}, |
| 95 | {"gstabs-packing", no_argument, NULL, OPTION_GSTABSPACKING}, |
| 96 | {"nogstabspacking", no_argument, NULL, OPTION_NOGSTABSPACKING}, |
| 97 | {"no-gstabs-packing", no_argument, NULL, OPTION_NOGSTABSPACKING}, |
| 98 | {NULL, no_argument, NULL, 0} |
| 99 | }; |
| 100 | |
| 101 | size_t md_longopts_size = sizeof (md_longopts); |
| 102 | |
| 103 | /* Opcode hash table. */ |
| 104 | static struct hash_control *d10v_hash; |
| 105 | |
| 106 | /* Do a binary search of the d10v_predefined_registers array to see if |
| 107 | NAME is a valid regiter name. Return the register number from the |
| 108 | array on success, or -1 on failure. */ |
| 109 | |
| 110 | static int |
| 111 | reg_name_search (char *name) |
| 112 | { |
| 113 | int middle, low, high; |
| 114 | int cmp; |
| 115 | |
| 116 | low = 0; |
| 117 | high = d10v_reg_name_cnt () - 1; |
| 118 | |
| 119 | do |
| 120 | { |
| 121 | middle = (low + high) / 2; |
| 122 | cmp = strcasecmp (name, d10v_predefined_registers[middle].name); |
| 123 | if (cmp < 0) |
| 124 | high = middle - 1; |
| 125 | else if (cmp > 0) |
| 126 | low = middle + 1; |
| 127 | else |
| 128 | return d10v_predefined_registers[middle].value; |
| 129 | } |
| 130 | while (low <= high); |
| 131 | return -1; |
| 132 | } |
| 133 | |
| 134 | /* Check the string at input_line_pointer |
| 135 | to see if it is a valid register name. */ |
| 136 | |
| 137 | static int |
| 138 | register_name (expressionS *expressionP) |
| 139 | { |
| 140 | int reg_number; |
| 141 | char c, *p = input_line_pointer; |
| 142 | |
| 143 | while (*p |
| 144 | && *p != '\n' && *p != '\r' && *p != ',' && *p != ' ' && *p != ')') |
| 145 | p++; |
| 146 | |
| 147 | c = *p; |
| 148 | if (c) |
| 149 | *p++ = 0; |
| 150 | |
| 151 | /* Look to see if it's in the register table. */ |
| 152 | reg_number = reg_name_search (input_line_pointer); |
| 153 | if (reg_number >= 0) |
| 154 | { |
| 155 | expressionP->X_op = O_register; |
| 156 | /* Temporarily store a pointer to the string here. */ |
| 157 | expressionP->X_op_symbol = (symbolS *) input_line_pointer; |
| 158 | expressionP->X_add_number = reg_number; |
| 159 | input_line_pointer = p; |
| 160 | return 1; |
| 161 | } |
| 162 | if (c) |
| 163 | *(p - 1) = c; |
| 164 | return 0; |
| 165 | } |
| 166 | |
| 167 | static int |
| 168 | check_range (unsigned long num, int bits, int flags) |
| 169 | { |
| 170 | long min, max; |
| 171 | int retval = 0; |
| 172 | |
| 173 | /* Don't bother checking 16-bit values. */ |
| 174 | if (bits == 16) |
| 175 | return 0; |
| 176 | |
| 177 | if (flags & OPERAND_SHIFT) |
| 178 | { |
| 179 | /* All special shift operands are unsigned and <= 16. |
| 180 | We allow 0 for now. */ |
| 181 | if (num > 16) |
| 182 | return 1; |
| 183 | else |
| 184 | return 0; |
| 185 | } |
| 186 | |
| 187 | if (flags & OPERAND_SIGNED) |
| 188 | { |
| 189 | /* Signed 3-bit integers are restricted to the (-2, 3) range. */ |
| 190 | if (flags & RESTRICTED_NUM3) |
| 191 | { |
| 192 | if ((long) num < -2 || (long) num > 3) |
| 193 | retval = 1; |
| 194 | } |
| 195 | else |
| 196 | { |
| 197 | max = (1 << (bits - 1)) - 1; |
| 198 | min = - (1 << (bits - 1)); |
| 199 | if (((long) num > max) || ((long) num < min)) |
| 200 | retval = 1; |
| 201 | } |
| 202 | } |
| 203 | else |
| 204 | { |
| 205 | max = (1 << bits) - 1; |
| 206 | min = 0; |
| 207 | if (((long) num > max) || ((long) num < min)) |
| 208 | retval = 1; |
| 209 | } |
| 210 | return retval; |
| 211 | } |
| 212 | |
| 213 | void |
| 214 | md_show_usage (FILE *stream) |
| 215 | { |
| 216 | fprintf (stream, _("D10V options:\n\ |
| 217 | -O Optimize. Will do some operations in parallel.\n\ |
| 218 | --gstabs-packing Pack adjacent short instructions together even\n\ |
| 219 | when --gstabs is specified. On by default.\n\ |
| 220 | --no-gstabs-packing If --gstabs is specified, do not pack adjacent\n\ |
| 221 | instructions together.\n")); |
| 222 | } |
| 223 | |
| 224 | int |
| 225 | md_parse_option (int c, char *arg ATTRIBUTE_UNUSED) |
| 226 | { |
| 227 | switch (c) |
| 228 | { |
| 229 | case 'O': |
| 230 | /* Optimize. Will attempt to parallelize operations. */ |
| 231 | Optimizing = 1; |
| 232 | break; |
| 233 | case OPTION_NOWARNSWAP: |
| 234 | flag_warn_suppress_instructionswap = 1; |
| 235 | break; |
| 236 | case OPTION_GSTABSPACKING: |
| 237 | flag_allow_gstabs_packing = 1; |
| 238 | break; |
| 239 | case OPTION_NOGSTABSPACKING: |
| 240 | flag_allow_gstabs_packing = 0; |
| 241 | break; |
| 242 | default: |
| 243 | return 0; |
| 244 | } |
| 245 | return 1; |
| 246 | } |
| 247 | |
| 248 | symbolS * |
| 249 | md_undefined_symbol (char *name ATTRIBUTE_UNUSED) |
| 250 | { |
| 251 | return 0; |
| 252 | } |
| 253 | |
| 254 | /* Turn a string in input_line_pointer into a floating point constant |
| 255 | of type TYPE, and store the appropriate bytes in *LITP. The number |
| 256 | of LITTLENUMS emitted is stored in *SIZEP. An error message is |
| 257 | returned, or NULL on OK. */ |
| 258 | |
| 259 | char * |
| 260 | md_atof (int type, char *litP, int *sizeP) |
| 261 | { |
| 262 | int prec; |
| 263 | LITTLENUM_TYPE words[4]; |
| 264 | char *t; |
| 265 | int i; |
| 266 | |
| 267 | switch (type) |
| 268 | { |
| 269 | case 'f': |
| 270 | prec = 2; |
| 271 | break; |
| 272 | case 'd': |
| 273 | prec = 4; |
| 274 | break; |
| 275 | default: |
| 276 | *sizeP = 0; |
| 277 | return _("bad call to md_atof"); |
| 278 | } |
| 279 | |
| 280 | t = atof_ieee (input_line_pointer, type, words); |
| 281 | if (t) |
| 282 | input_line_pointer = t; |
| 283 | |
| 284 | *sizeP = prec * 2; |
| 285 | |
| 286 | for (i = 0; i < prec; i++) |
| 287 | { |
| 288 | md_number_to_chars (litP, (valueT) words[i], 2); |
| 289 | litP += 2; |
| 290 | } |
| 291 | return NULL; |
| 292 | } |
| 293 | |
| 294 | void |
| 295 | md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, |
| 296 | asection *sec ATTRIBUTE_UNUSED, |
| 297 | fragS *fragP ATTRIBUTE_UNUSED) |
| 298 | { |
| 299 | abort (); |
| 300 | } |
| 301 | |
| 302 | valueT |
| 303 | md_section_align (asection *seg, valueT addr) |
| 304 | { |
| 305 | int align = bfd_get_section_alignment (stdoutput, seg); |
| 306 | return ((addr + (1 << align) - 1) & (-1 << align)); |
| 307 | } |
| 308 | |
| 309 | void |
| 310 | md_begin (void) |
| 311 | { |
| 312 | char *prev_name = ""; |
| 313 | struct d10v_opcode *opcode; |
| 314 | d10v_hash = hash_new (); |
| 315 | |
| 316 | /* Insert unique names into hash table. The D10v instruction set |
| 317 | has many identical opcode names that have different opcodes based |
| 318 | on the operands. This hash table then provides a quick index to |
| 319 | the first opcode with a particular name in the opcode table. */ |
| 320 | |
| 321 | for (opcode = (struct d10v_opcode *) d10v_opcodes; opcode->name; opcode++) |
| 322 | { |
| 323 | if (strcmp (prev_name, opcode->name)) |
| 324 | { |
| 325 | prev_name = (char *) opcode->name; |
| 326 | hash_insert (d10v_hash, opcode->name, (char *) opcode); |
| 327 | } |
| 328 | } |
| 329 | |
| 330 | fixups = &FixUps[0]; |
| 331 | FixUps[0].next = &FixUps[1]; |
| 332 | FixUps[1].next = &FixUps[0]; |
| 333 | } |
| 334 | |
| 335 | /* Remove the postincrement or postdecrement operator ( '+' or '-' ) |
| 336 | from an expression. */ |
| 337 | |
| 338 | static int |
| 339 | postfix (char *p) |
| 340 | { |
| 341 | while (*p != '-' && *p != '+') |
| 342 | { |
| 343 | if (*p == 0 || *p == '\n' || *p == '\r') |
| 344 | break; |
| 345 | p++; |
| 346 | } |
| 347 | |
| 348 | if (*p == '-') |
| 349 | { |
| 350 | *p = ' '; |
| 351 | return -1; |
| 352 | } |
| 353 | if (*p == '+') |
| 354 | { |
| 355 | *p = ' '; |
| 356 | return 1; |
| 357 | } |
| 358 | |
| 359 | return 0; |
| 360 | } |
| 361 | |
| 362 | static bfd_reloc_code_real_type |
| 363 | get_reloc (struct d10v_operand *op) |
| 364 | { |
| 365 | int bits = op->bits; |
| 366 | |
| 367 | if (bits <= 4) |
| 368 | return 0; |
| 369 | |
| 370 | if (op->flags & OPERAND_ADDR) |
| 371 | { |
| 372 | if (bits == 8) |
| 373 | return BFD_RELOC_D10V_10_PCREL_R; |
| 374 | else |
| 375 | return BFD_RELOC_D10V_18_PCREL; |
| 376 | } |
| 377 | |
| 378 | return BFD_RELOC_16; |
| 379 | } |
| 380 | |
| 381 | /* Parse a string of operands. Return an array of expressions. */ |
| 382 | |
| 383 | static int |
| 384 | get_operands (expressionS exp[]) |
| 385 | { |
| 386 | char *p = input_line_pointer; |
| 387 | int numops = 0; |
| 388 | int post = 0; |
| 389 | int uses_at = 0; |
| 390 | |
| 391 | while (*p) |
| 392 | { |
| 393 | while (*p == ' ' || *p == '\t' || *p == ',') |
| 394 | p++; |
| 395 | if (*p == 0 || *p == '\n' || *p == '\r') |
| 396 | break; |
| 397 | |
| 398 | if (*p == '@') |
| 399 | { |
| 400 | uses_at = 1; |
| 401 | |
| 402 | p++; |
| 403 | exp[numops].X_op = O_absent; |
| 404 | if (*p == '(') |
| 405 | { |
| 406 | p++; |
| 407 | exp[numops].X_add_number = OPERAND_ATPAR; |
| 408 | } |
| 409 | else if (*p == '-') |
| 410 | { |
| 411 | p++; |
| 412 | exp[numops].X_add_number = OPERAND_ATMINUS; |
| 413 | } |
| 414 | else |
| 415 | { |
| 416 | exp[numops].X_add_number = OPERAND_ATSIGN; |
| 417 | if (*p == '+') |
| 418 | { |
| 419 | numops++; |
| 420 | exp[numops].X_op = O_absent; |
| 421 | exp[numops].X_add_number = OPERAND_PLUS; |
| 422 | p++; |
| 423 | } |
| 424 | post = postfix (p); |
| 425 | } |
| 426 | numops++; |
| 427 | continue; |
| 428 | } |
| 429 | |
| 430 | if (*p == ')') |
| 431 | { |
| 432 | /* Just skip the trailing paren. */ |
| 433 | p++; |
| 434 | continue; |
| 435 | } |
| 436 | |
| 437 | input_line_pointer = p; |
| 438 | |
| 439 | /* Check to see if it might be a register name. */ |
| 440 | if (!register_name (&exp[numops])) |
| 441 | { |
| 442 | /* Parse as an expression. */ |
| 443 | if (uses_at) |
| 444 | { |
| 445 | /* Any expression that involves the indirect addressing |
| 446 | cannot also involve immediate addressing. Therefore |
| 447 | the use of the hash character is illegal. */ |
| 448 | int save = do_not_ignore_hash; |
| 449 | do_not_ignore_hash = 1; |
| 450 | |
| 451 | expression (&exp[numops]); |
| 452 | |
| 453 | do_not_ignore_hash = save; |
| 454 | } |
| 455 | else |
| 456 | expression (&exp[numops]); |
| 457 | } |
| 458 | |
| 459 | if (strncasecmp (input_line_pointer, "@word", 5) == 0) |
| 460 | { |
| 461 | input_line_pointer += 5; |
| 462 | if (exp[numops].X_op == O_register) |
| 463 | { |
| 464 | /* If it looked like a register name but was followed by |
| 465 | "@word" then it was really a symbol, so change it to |
| 466 | one. */ |
| 467 | exp[numops].X_op = O_symbol; |
| 468 | exp[numops].X_add_symbol = |
| 469 | symbol_find_or_make ((char *) exp[numops].X_op_symbol); |
| 470 | } |
| 471 | |
| 472 | /* Check for identifier@word+constant. */ |
| 473 | if (*input_line_pointer == '-' || *input_line_pointer == '+') |
| 474 | { |
| 475 | expressionS new_exp; |
| 476 | expression (&new_exp); |
| 477 | exp[numops].X_add_number = new_exp.X_add_number; |
| 478 | } |
| 479 | |
| 480 | /* Convert expr into a right shift by AT_WORD_RIGHT_SHIFT. */ |
| 481 | { |
| 482 | expressionS new_exp; |
| 483 | memset (&new_exp, 0, sizeof new_exp); |
| 484 | new_exp.X_add_number = AT_WORD_RIGHT_SHIFT; |
| 485 | new_exp.X_op = O_constant; |
| 486 | new_exp.X_unsigned = 1; |
| 487 | exp[numops].X_op_symbol = make_expr_symbol (&new_exp); |
| 488 | exp[numops].X_op = O_right_shift; |
| 489 | } |
| 490 | |
| 491 | know (AT_WORD_P (&exp[numops])); |
| 492 | } |
| 493 | |
| 494 | if (exp[numops].X_op == O_illegal) |
| 495 | as_bad (_("illegal operand")); |
| 496 | else if (exp[numops].X_op == O_absent) |
| 497 | as_bad (_("missing operand")); |
| 498 | |
| 499 | numops++; |
| 500 | p = input_line_pointer; |
| 501 | } |
| 502 | |
| 503 | switch (post) |
| 504 | { |
| 505 | case -1: /* Postdecrement mode. */ |
| 506 | exp[numops].X_op = O_absent; |
| 507 | exp[numops++].X_add_number = OPERAND_MINUS; |
| 508 | break; |
| 509 | case 1: /* Postincrement mode. */ |
| 510 | exp[numops].X_op = O_absent; |
| 511 | exp[numops++].X_add_number = OPERAND_PLUS; |
| 512 | break; |
| 513 | } |
| 514 | |
| 515 | exp[numops].X_op = 0; |
| 516 | return numops; |
| 517 | } |
| 518 | |
| 519 | static unsigned long |
| 520 | d10v_insert_operand (unsigned long insn, |
| 521 | int op_type, |
| 522 | offsetT value, |
| 523 | int left, |
| 524 | fixS *fix) |
| 525 | { |
| 526 | int shift, bits; |
| 527 | |
| 528 | shift = d10v_operands[op_type].shift; |
| 529 | if (left) |
| 530 | shift += 15; |
| 531 | |
| 532 | bits = d10v_operands[op_type].bits; |
| 533 | |
| 534 | /* Truncate to the proper number of bits. */ |
| 535 | if (check_range (value, bits, d10v_operands[op_type].flags)) |
| 536 | as_bad_where (fix->fx_file, fix->fx_line, |
| 537 | _("operand out of range: %ld"), (long) value); |
| 538 | |
| 539 | value &= 0x7FFFFFFF >> (31 - bits); |
| 540 | insn |= (value << shift); |
| 541 | |
| 542 | return insn; |
| 543 | } |
| 544 | |
| 545 | /* Take a pointer to the opcode entry in the opcode table and the |
| 546 | array of operand expressions. Return the instruction. */ |
| 547 | |
| 548 | static unsigned long |
| 549 | build_insn (struct d10v_opcode *opcode, |
| 550 | expressionS *opers, |
| 551 | unsigned long insn) |
| 552 | { |
| 553 | int i, bits, shift, flags, format; |
| 554 | unsigned long number; |
| 555 | |
| 556 | /* The insn argument is only used for the DIVS kludge. */ |
| 557 | if (insn) |
| 558 | format = LONG_R; |
| 559 | else |
| 560 | { |
| 561 | insn = opcode->opcode; |
| 562 | format = opcode->format; |
| 563 | } |
| 564 | |
| 565 | for (i = 0; opcode->operands[i]; i++) |
| 566 | { |
| 567 | flags = d10v_operands[opcode->operands[i]].flags; |
| 568 | bits = d10v_operands[opcode->operands[i]].bits; |
| 569 | shift = d10v_operands[opcode->operands[i]].shift; |
| 570 | number = opers[i].X_add_number; |
| 571 | |
| 572 | if (flags & OPERAND_REG) |
| 573 | { |
| 574 | number &= REGISTER_MASK; |
| 575 | if (format == LONG_L) |
| 576 | shift += 15; |
| 577 | } |
| 578 | |
| 579 | if (opers[i].X_op != O_register && opers[i].X_op != O_constant) |
| 580 | { |
| 581 | /* Now create a fixup. */ |
| 582 | |
| 583 | if (fixups->fc >= MAX_INSN_FIXUPS) |
| 584 | as_fatal (_("too many fixups")); |
| 585 | |
| 586 | if (AT_WORD_P (&opers[i])) |
| 587 | { |
| 588 | /* Recognize XXX>>1+N aka XXX@word+N as special (AT_WORD). */ |
| 589 | fixups->fix[fixups->fc].reloc = BFD_RELOC_D10V_18; |
| 590 | opers[i].X_op = O_symbol; |
| 591 | opers[i].X_op_symbol = NULL; /* Should free it. */ |
| 592 | /* number is left shifted by AT_WORD_RIGHT_SHIFT so |
| 593 | that, it is aligned with the symbol's value. Later, |
| 594 | BFD_RELOC_D10V_18 will right shift (symbol_value + |
| 595 | X_add_number). */ |
| 596 | number <<= AT_WORD_RIGHT_SHIFT; |
| 597 | opers[i].X_add_number = number; |
| 598 | } |
| 599 | else |
| 600 | { |
| 601 | fixups->fix[fixups->fc].reloc = |
| 602 | get_reloc ((struct d10v_operand *) &d10v_operands[opcode->operands[i]]); |
| 603 | |
| 604 | /* Check that an immediate was passed to ops that expect one. */ |
| 605 | if ((flags & OPERAND_NUM) |
| 606 | && (fixups->fix[fixups->fc].reloc == 0)) |
| 607 | as_bad (_("operand is not an immediate")); |
| 608 | } |
| 609 | |
| 610 | if (fixups->fix[fixups->fc].reloc == BFD_RELOC_16 || |
| 611 | fixups->fix[fixups->fc].reloc == BFD_RELOC_D10V_18) |
| 612 | fixups->fix[fixups->fc].size = 2; |
| 613 | else |
| 614 | fixups->fix[fixups->fc].size = 4; |
| 615 | |
| 616 | fixups->fix[fixups->fc].exp = opers[i]; |
| 617 | fixups->fix[fixups->fc].operand = opcode->operands[i]; |
| 618 | fixups->fix[fixups->fc].pcrel = |
| 619 | (flags & OPERAND_ADDR) ? TRUE : FALSE; |
| 620 | (fixups->fc)++; |
| 621 | } |
| 622 | |
| 623 | /* Truncate to the proper number of bits. */ |
| 624 | if ((opers[i].X_op == O_constant) && check_range (number, bits, flags)) |
| 625 | as_bad (_("operand out of range: %lu"), number); |
| 626 | number &= 0x7FFFFFFF >> (31 - bits); |
| 627 | insn = insn | (number << shift); |
| 628 | } |
| 629 | |
| 630 | /* kludge: for DIVS, we need to put the operands in twice on the second |
| 631 | pass, format is changed to LONG_R to force the second set of operands |
| 632 | to not be shifted over 15. */ |
| 633 | if ((opcode->opcode == OPCODE_DIVS) && (format == LONG_L)) |
| 634 | insn = build_insn (opcode, opers, insn); |
| 635 | |
| 636 | return insn; |
| 637 | } |
| 638 | |
| 639 | /* Write out a long form instruction. */ |
| 640 | |
| 641 | static void |
| 642 | write_long (unsigned long insn, Fixups *fx) |
| 643 | { |
| 644 | int i, where; |
| 645 | char *f = frag_more (4); |
| 646 | |
| 647 | insn |= FM11; |
| 648 | number_to_chars_bigendian (f, insn, 4); |
| 649 | |
| 650 | for (i = 0; i < fx->fc; i++) |
| 651 | { |
| 652 | if (fx->fix[i].reloc) |
| 653 | { |
| 654 | where = f - frag_now->fr_literal; |
| 655 | if (fx->fix[i].size == 2) |
| 656 | where += 2; |
| 657 | |
| 658 | if (fx->fix[i].reloc == BFD_RELOC_D10V_18) |
| 659 | fx->fix[i].operand |= 4096; |
| 660 | |
| 661 | fix_new_exp (frag_now, |
| 662 | where, |
| 663 | fx->fix[i].size, |
| 664 | &(fx->fix[i].exp), |
| 665 | fx->fix[i].pcrel, |
| 666 | fx->fix[i].operand|2048); |
| 667 | } |
| 668 | } |
| 669 | fx->fc = 0; |
| 670 | } |
| 671 | |
| 672 | /* Write out a short form instruction by itself. */ |
| 673 | |
| 674 | static void |
| 675 | write_1_short (struct d10v_opcode *opcode, |
| 676 | unsigned long insn, |
| 677 | Fixups *fx) |
| 678 | { |
| 679 | char *f = frag_more (4); |
| 680 | int i, where; |
| 681 | |
| 682 | if (opcode->exec_type & PARONLY) |
| 683 | as_fatal (_("Instruction must be executed in parallel with another instruction.")); |
| 684 | |
| 685 | /* The other container needs to be NOP. |
| 686 | According to 4.3.1: for FM=00, sub-instructions performed only by IU |
| 687 | cannot be encoded in L-container. */ |
| 688 | if (opcode->unit == IU) |
| 689 | insn |= FM00 | (NOP << 15); /* Right container. */ |
| 690 | else |
| 691 | insn = FM00 | (insn << 15) | NOP; /* Left container. */ |
| 692 | |
| 693 | number_to_chars_bigendian (f, insn, 4); |
| 694 | for (i = 0; i < fx->fc; i++) |
| 695 | { |
| 696 | if (fx->fix[i].reloc) |
| 697 | { |
| 698 | where = f - frag_now->fr_literal; |
| 699 | if (fx->fix[i].size == 2) |
| 700 | where += 2; |
| 701 | |
| 702 | if (fx->fix[i].reloc == BFD_RELOC_D10V_18) |
| 703 | fx->fix[i].operand |= 4096; |
| 704 | |
| 705 | /* If it's an R reloc, we may have to switch it to L. */ |
| 706 | if ((fx->fix[i].reloc == BFD_RELOC_D10V_10_PCREL_R) |
| 707 | && (opcode->unit != IU)) |
| 708 | fx->fix[i].operand |= 1024; |
| 709 | |
| 710 | fix_new_exp (frag_now, |
| 711 | where, |
| 712 | fx->fix[i].size, |
| 713 | &(fx->fix[i].exp), |
| 714 | fx->fix[i].pcrel, |
| 715 | fx->fix[i].operand|2048); |
| 716 | } |
| 717 | } |
| 718 | fx->fc = 0; |
| 719 | } |
| 720 | |
| 721 | /* Determine if there are any resource conflicts among two manually |
| 722 | parallelized instructions. Some of this was lifted from parallel_ok. */ |
| 723 | |
| 724 | static void |
| 725 | check_resource_conflict (struct d10v_opcode *op1, |
| 726 | unsigned long insn1, |
| 727 | struct d10v_opcode *op2, |
| 728 | unsigned long insn2) |
| 729 | { |
| 730 | int i, j, flags, mask, shift, regno; |
| 731 | unsigned long ins, mod[2]; |
| 732 | struct d10v_opcode *op; |
| 733 | |
| 734 | if ((op1->exec_type & SEQ) |
| 735 | || ! ((op1->exec_type & PAR) || (op1->exec_type & PARONLY))) |
| 736 | { |
| 737 | as_warn (_("packing conflict: %s must dispatch sequentially"), |
| 738 | op1->name); |
| 739 | return; |
| 740 | } |
| 741 | |
| 742 | if ((op2->exec_type & SEQ) |
| 743 | || ! ((op2->exec_type & PAR) || (op2->exec_type & PARONLY))) |
| 744 | { |
| 745 | as_warn (_("packing conflict: %s must dispatch sequentially"), |
| 746 | op2->name); |
| 747 | return; |
| 748 | } |
| 749 | |
| 750 | /* See if both instructions write to the same resource. |
| 751 | |
| 752 | The idea here is to create two sets of bitmasks (mod and used) which |
| 753 | indicate which registers are modified or used by each instruction. |
| 754 | The operation can only be done in parallel if neither instruction |
| 755 | modifies the same register. Accesses to control registers and memory |
| 756 | are treated as accesses to a single register. So if both instructions |
| 757 | write memory or if the first instruction writes memory and the second |
| 758 | reads, then they cannot be done in parallel. We treat reads to the PSW |
| 759 | (which includes C, F0, and F1) in isolation. So simultaneously writing |
| 760 | C and F0 in two different sub-instructions is permitted. */ |
| 761 | |
| 762 | /* The bitmasks (mod and used) look like this (bit 31 = MSB). |
| 763 | r0-r15 0-15 |
| 764 | a0-a1 16-17 |
| 765 | cr (not psw) 18 |
| 766 | psw(other) 19 |
| 767 | mem 20 |
| 768 | psw(C flag) 21 |
| 769 | psw(F0 flag) 22 */ |
| 770 | |
| 771 | for (j = 0; j < 2; j++) |
| 772 | { |
| 773 | if (j == 0) |
| 774 | { |
| 775 | op = op1; |
| 776 | ins = insn1; |
| 777 | } |
| 778 | else |
| 779 | { |
| 780 | op = op2; |
| 781 | ins = insn2; |
| 782 | } |
| 783 | mod[j] = 0; |
| 784 | if (op->exec_type & BRANCH_LINK) |
| 785 | mod[j] |= 1 << 13; |
| 786 | |
| 787 | for (i = 0; op->operands[i]; i++) |
| 788 | { |
| 789 | flags = d10v_operands[op->operands[i]].flags; |
| 790 | shift = d10v_operands[op->operands[i]].shift; |
| 791 | mask = 0x7FFFFFFF >> (31 - d10v_operands[op->operands[i]].bits); |
| 792 | if (flags & OPERAND_REG) |
| 793 | { |
| 794 | regno = (ins >> shift) & mask; |
| 795 | if (flags & (OPERAND_ACC0 | OPERAND_ACC1)) |
| 796 | regno += 16; |
| 797 | else if (flags & OPERAND_CONTROL) /* mvtc or mvfc */ |
| 798 | { |
| 799 | if (regno == 0) |
| 800 | regno = 19; |
| 801 | else |
| 802 | regno = 18; |
| 803 | } |
| 804 | else if (flags & OPERAND_FFLAG) |
| 805 | regno = 22; |
| 806 | else if (flags & OPERAND_CFLAG) |
| 807 | regno = 21; |
| 808 | |
| 809 | if (flags & OPERAND_DEST |
| 810 | /* Auto inc/dec also modifies the register. */ |
| 811 | || (op->operands[i + 1] != 0 |
| 812 | && (d10v_operands[op->operands[i + 1]].flags |
| 813 | & (OPERAND_PLUS | OPERAND_MINUS)) != 0)) |
| 814 | { |
| 815 | mod[j] |= 1 << regno; |
| 816 | if (flags & OPERAND_EVEN) |
| 817 | mod[j] |= 1 << (regno + 1); |
| 818 | } |
| 819 | } |
| 820 | else if (flags & OPERAND_ATMINUS) |
| 821 | { |
| 822 | /* SP implicitly used/modified. */ |
| 823 | mod[j] |= 1 << 15; |
| 824 | } |
| 825 | } |
| 826 | |
| 827 | if (op->exec_type & WMEM) |
| 828 | mod[j] |= 1 << 20; |
| 829 | else if (op->exec_type & WF0) |
| 830 | mod[j] |= 1 << 22; |
| 831 | else if (op->exec_type & WCAR) |
| 832 | mod[j] |= 1 << 21; |
| 833 | } |
| 834 | |
| 835 | if ((mod[0] & mod[1]) == 0) |
| 836 | return; |
| 837 | else |
| 838 | { |
| 839 | unsigned long x; |
| 840 | x = mod[0] & mod[1]; |
| 841 | |
| 842 | for (j = 0; j <= 15; j++) |
| 843 | if (x & (1 << j)) |
| 844 | as_warn (_("resource conflict (R%d)"), j); |
| 845 | for (j = 16; j <= 17; j++) |
| 846 | if (x & (1 << j)) |
| 847 | as_warn (_("resource conflict (A%d)"), j - 16); |
| 848 | if (x & (1 << 19)) |
| 849 | as_warn (_("resource conflict (PSW)")); |
| 850 | if (x & (1 << 21)) |
| 851 | as_warn (_("resource conflict (C flag)")); |
| 852 | if (x & (1 << 22)) |
| 853 | as_warn (_("resource conflict (F flag)")); |
| 854 | } |
| 855 | } |
| 856 | |
| 857 | /* Check 2 instructions and determine if they can be safely |
| 858 | executed in parallel. Return 1 if they can be. */ |
| 859 | |
| 860 | static int |
| 861 | parallel_ok (struct d10v_opcode *op1, |
| 862 | unsigned long insn1, |
| 863 | struct d10v_opcode *op2, |
| 864 | unsigned long insn2, |
| 865 | packing_type exec_type) |
| 866 | { |
| 867 | int i, j, flags, mask, shift, regno; |
| 868 | unsigned long ins, mod[2], used[2]; |
| 869 | struct d10v_opcode *op; |
| 870 | |
| 871 | if ((op1->exec_type & SEQ) != 0 || (op2->exec_type & SEQ) != 0 |
| 872 | || (op1->exec_type & PAR) == 0 || (op2->exec_type & PAR) == 0 |
| 873 | || (op1->unit == BOTH) || (op2->unit == BOTH) |
| 874 | || (op1->unit == IU && op2->unit == IU) |
| 875 | || (op1->unit == MU && op2->unit == MU)) |
| 876 | return 0; |
| 877 | |
| 878 | /* If this is auto parallelization, and the first instruction is a |
| 879 | branch or should not be packed, then don't parallelize. */ |
| 880 | if (exec_type == PACK_UNSPEC |
| 881 | && (op1->exec_type & (ALONE | BRANCH))) |
| 882 | return 0; |
| 883 | |
| 884 | /* The idea here is to create two sets of bitmasks (mod and used) |
| 885 | which indicate which registers are modified or used by each |
| 886 | instruction. The operation can only be done in parallel if |
| 887 | instruction 1 and instruction 2 modify different registers, and |
| 888 | the first instruction does not modify registers that the second |
| 889 | is using (The second instruction can modify registers that the |
| 890 | first is using as they are only written back after the first |
| 891 | instruction has completed). Accesses to control registers, PSW, |
| 892 | and memory are treated as accesses to a single register. So if |
| 893 | both instructions write memory or if the first instruction writes |
| 894 | memory and the second reads, then they cannot be done in |
| 895 | parallel. Likewise, if the first instruction mucks with the psw |
| 896 | and the second reads the PSW (which includes C, F0, and F1), then |
| 897 | they cannot operate safely in parallel. */ |
| 898 | |
| 899 | /* The bitmasks (mod and used) look like this (bit 31 = MSB). |
| 900 | r0-r15 0-15 |
| 901 | a0-a1 16-17 |
| 902 | cr (not psw) 18 |
| 903 | psw 19 |
| 904 | mem 20 */ |
| 905 | |
| 906 | for (j = 0; j < 2; j++) |
| 907 | { |
| 908 | if (j == 0) |
| 909 | { |
| 910 | op = op1; |
| 911 | ins = insn1; |
| 912 | } |
| 913 | else |
| 914 | { |
| 915 | op = op2; |
| 916 | ins = insn2; |
| 917 | } |
| 918 | mod[j] = used[j] = 0; |
| 919 | if (op->exec_type & BRANCH_LINK) |
| 920 | mod[j] |= 1 << 13; |
| 921 | |
| 922 | for (i = 0; op->operands[i]; i++) |
| 923 | { |
| 924 | flags = d10v_operands[op->operands[i]].flags; |
| 925 | shift = d10v_operands[op->operands[i]].shift; |
| 926 | mask = 0x7FFFFFFF >> (31 - d10v_operands[op->operands[i]].bits); |
| 927 | if (flags & OPERAND_REG) |
| 928 | { |
| 929 | regno = (ins >> shift) & mask; |
| 930 | if (flags & (OPERAND_ACC0 | OPERAND_ACC1)) |
| 931 | regno += 16; |
| 932 | else if (flags & OPERAND_CONTROL) /* mvtc or mvfc. */ |
| 933 | { |
| 934 | if (regno == 0) |
| 935 | regno = 19; |
| 936 | else |
| 937 | regno = 18; |
| 938 | } |
| 939 | else if (flags & (OPERAND_FFLAG | OPERAND_CFLAG)) |
| 940 | regno = 19; |
| 941 | |
| 942 | if (flags & OPERAND_DEST) |
| 943 | { |
| 944 | mod[j] |= 1 << regno; |
| 945 | if (flags & OPERAND_EVEN) |
| 946 | mod[j] |= 1 << (regno + 1); |
| 947 | } |
| 948 | else |
| 949 | { |
| 950 | used[j] |= 1 << regno; |
| 951 | if (flags & OPERAND_EVEN) |
| 952 | used[j] |= 1 << (regno + 1); |
| 953 | |
| 954 | /* Auto inc/dec also modifies the register. */ |
| 955 | if (op->operands[i + 1] != 0 |
| 956 | && (d10v_operands[op->operands[i + 1]].flags |
| 957 | & (OPERAND_PLUS | OPERAND_MINUS)) != 0) |
| 958 | mod[j] |= 1 << regno; |
| 959 | } |
| 960 | } |
| 961 | else if (flags & OPERAND_ATMINUS) |
| 962 | { |
| 963 | /* SP implicitly used/modified. */ |
| 964 | mod[j] |= 1 << 15; |
| 965 | used[j] |= 1 << 15; |
| 966 | } |
| 967 | } |
| 968 | if (op->exec_type & RMEM) |
| 969 | used[j] |= 1 << 20; |
| 970 | else if (op->exec_type & WMEM) |
| 971 | mod[j] |= 1 << 20; |
| 972 | else if (op->exec_type & RF0) |
| 973 | used[j] |= 1 << 19; |
| 974 | else if (op->exec_type & WF0) |
| 975 | mod[j] |= 1 << 19; |
| 976 | else if (op->exec_type & WCAR) |
| 977 | mod[j] |= 1 << 19; |
| 978 | } |
| 979 | if ((mod[0] & mod[1]) == 0 && (mod[0] & used[1]) == 0) |
| 980 | return 1; |
| 981 | return 0; |
| 982 | } |
| 983 | |
| 984 | /* Expects two short instructions. |
| 985 | If possible, writes out both as a single packed instruction. |
| 986 | Otherwise, writes out the first one, packed with a NOP. |
| 987 | Returns number of instructions not written out. */ |
| 988 | |
| 989 | static int |
| 990 | write_2_short (struct d10v_opcode *opcode1, |
| 991 | unsigned long insn1, |
| 992 | struct d10v_opcode *opcode2, |
| 993 | unsigned long insn2, |
| 994 | packing_type exec_type, |
| 995 | Fixups *fx) |
| 996 | { |
| 997 | unsigned long insn; |
| 998 | char *f; |
| 999 | int i, j, where; |
| 1000 | |
| 1001 | if ((exec_type != PACK_PARALLEL) |
| 1002 | && ((opcode1->exec_type & PARONLY) || (opcode2->exec_type & PARONLY))) |
| 1003 | as_fatal (_("Instruction must be executed in parallel")); |
| 1004 | |
| 1005 | if ((opcode1->format & LONG_OPCODE) || (opcode2->format & LONG_OPCODE)) |
| 1006 | as_fatal (_("Long instructions may not be combined.")); |
| 1007 | |
| 1008 | switch (exec_type) |
| 1009 | { |
| 1010 | case PACK_UNSPEC: /* Order not specified. */ |
| 1011 | if (opcode1->exec_type & ALONE) |
| 1012 | { |
| 1013 | /* Case of a short branch on a separate GAS line. Pack with NOP. */ |
| 1014 | write_1_short (opcode1, insn1, fx->next); |
| 1015 | return 1; |
| 1016 | } |
| 1017 | if (Optimizing |
| 1018 | && parallel_ok (opcode1, insn1, opcode2, insn2, exec_type)) |
| 1019 | { |
| 1020 | /* Parallel. */ |
| 1021 | if (opcode1->unit == IU) |
| 1022 | insn = FM00 | (insn2 << 15) | insn1; |
| 1023 | else if (opcode2->unit == MU) |
| 1024 | insn = FM00 | (insn2 << 15) | insn1; |
| 1025 | else |
| 1026 | insn = FM00 | (insn1 << 15) | insn2; |
| 1027 | } |
| 1028 | else if (opcode1->unit == IU) |
| 1029 | /* Reverse sequential with IU opcode1 on right and done first. */ |
| 1030 | insn = FM10 | (insn2 << 15) | insn1; |
| 1031 | else |
| 1032 | /* Sequential with non-IU opcode1 on left and done first. */ |
| 1033 | insn = FM01 | (insn1 << 15) | insn2; |
| 1034 | break; |
| 1035 | |
| 1036 | case PACK_PARALLEL: |
| 1037 | if (opcode1->exec_type & SEQ || opcode2->exec_type & SEQ) |
| 1038 | as_fatal |
| 1039 | (_("One of these instructions may not be executed in parallel.")); |
| 1040 | if (opcode1->unit == IU) |
| 1041 | { |
| 1042 | if (opcode2->unit == IU) |
| 1043 | as_fatal (_("Two IU instructions may not be executed in parallel")); |
| 1044 | if (!flag_warn_suppress_instructionswap) |
| 1045 | as_warn (_("Swapping instruction order")); |
| 1046 | insn = FM00 | (insn2 << 15) | insn1; |
| 1047 | } |
| 1048 | else if (opcode2->unit == MU) |
| 1049 | { |
| 1050 | if (opcode1->unit == MU) |
| 1051 | as_fatal (_("Two MU instructions may not be executed in parallel")); |
| 1052 | if (!flag_warn_suppress_instructionswap) |
| 1053 | as_warn (_("Swapping instruction order")); |
| 1054 | insn = FM00 | (insn2 << 15) | insn1; |
| 1055 | } |
| 1056 | else |
| 1057 | insn = FM00 | (insn1 << 15) | insn2; |
| 1058 | check_resource_conflict (opcode1, insn1, opcode2, insn2); |
| 1059 | break; |
| 1060 | |
| 1061 | case PACK_LEFT_RIGHT: |
| 1062 | if (opcode1->unit != IU) |
| 1063 | insn = FM01 | (insn1 << 15) | insn2; |
| 1064 | else if (opcode2->unit == MU || opcode2->unit == EITHER) |
| 1065 | { |
| 1066 | if (!flag_warn_suppress_instructionswap) |
| 1067 | as_warn (_("Swapping instruction order")); |
| 1068 | insn = FM10 | (insn2 << 15) | insn1; |
| 1069 | } |
| 1070 | else |
| 1071 | as_fatal (_("IU instruction may not be in the left container")); |
| 1072 | if (opcode1->exec_type & ALONE) |
| 1073 | as_warn (_("Instruction in R container is squashed by flow control instruction in L container.")); |
| 1074 | break; |
| 1075 | |
| 1076 | case PACK_RIGHT_LEFT: |
| 1077 | if (opcode2->unit != MU) |
| 1078 | insn = FM10 | (insn1 << 15) | insn2; |
| 1079 | else if (opcode1->unit == IU || opcode1->unit == EITHER) |
| 1080 | { |
| 1081 | if (!flag_warn_suppress_instructionswap) |
| 1082 | as_warn (_("Swapping instruction order")); |
| 1083 | insn = FM01 | (insn2 << 15) | insn1; |
| 1084 | } |
| 1085 | else |
| 1086 | as_fatal (_("MU instruction may not be in the right container")); |
| 1087 | if (opcode2->exec_type & ALONE) |
| 1088 | as_warn (_("Instruction in R container is squashed by flow control instruction in L container.")); |
| 1089 | break; |
| 1090 | |
| 1091 | default: |
| 1092 | as_fatal (_("unknown execution type passed to write_2_short()")); |
| 1093 | } |
| 1094 | |
| 1095 | f = frag_more (4); |
| 1096 | number_to_chars_bigendian (f, insn, 4); |
| 1097 | |
| 1098 | /* Process fixup chains. fx refers to insn2 when j == 0, and to |
| 1099 | insn1 when j == 1. Yes, it's reversed. */ |
| 1100 | |
| 1101 | for (j = 0; j < 2; j++) |
| 1102 | { |
| 1103 | for (i = 0; i < fx->fc; i++) |
| 1104 | { |
| 1105 | if (fx->fix[i].reloc) |
| 1106 | { |
| 1107 | where = f - frag_now->fr_literal; |
| 1108 | if (fx->fix[i].size == 2) |
| 1109 | where += 2; |
| 1110 | |
| 1111 | if (fx->fix[i].reloc == BFD_RELOC_D10V_10_PCREL_R |
| 1112 | /* A BFD_RELOC_D10V_10_PCREL_R relocation applied to |
| 1113 | the instruction in the L container has to be |
| 1114 | adjusted to BDF_RELOC_D10V_10_PCREL_L. When |
| 1115 | j==0, we're processing insn2's operands, so we |
| 1116 | want to mark the operand if insn2 is *not* in the |
| 1117 | R container. When j==1, we're processing insn1's |
| 1118 | operands, so we want to mark the operand if insn2 |
| 1119 | *is* in the R container. Note that, if two |
| 1120 | instructions are identical, we're never going to |
| 1121 | swap them, so the test is safe. */ |
| 1122 | && j == ((insn & 0x7fff) == insn2)) |
| 1123 | fx->fix[i].operand |= 1024; |
| 1124 | |
| 1125 | if (fx->fix[i].reloc == BFD_RELOC_D10V_18) |
| 1126 | fx->fix[i].operand |= 4096; |
| 1127 | |
| 1128 | fix_new_exp (frag_now, |
| 1129 | where, |
| 1130 | fx->fix[i].size, |
| 1131 | &(fx->fix[i].exp), |
| 1132 | fx->fix[i].pcrel, |
| 1133 | fx->fix[i].operand|2048); |
| 1134 | } |
| 1135 | } |
| 1136 | fx->fc = 0; |
| 1137 | fx = fx->next; |
| 1138 | } |
| 1139 | return 0; |
| 1140 | } |
| 1141 | |
| 1142 | /* This is the main entry point for the machine-dependent assembler. |
| 1143 | str points to a machine-dependent instruction. This function is |
| 1144 | supposed to emit the frags/bytes it assembles to. For the D10V, it |
| 1145 | mostly handles the special VLIW parsing and packing and leaves the |
| 1146 | difficult stuff to do_assemble(). */ |
| 1147 | |
| 1148 | static unsigned long prev_insn; |
| 1149 | static struct d10v_opcode *prev_opcode = 0; |
| 1150 | static subsegT prev_subseg; |
| 1151 | static segT prev_seg = 0;; |
| 1152 | |
| 1153 | /* Find the symbol which has the same name as the register in exp. */ |
| 1154 | |
| 1155 | static symbolS * |
| 1156 | find_symbol_matching_register (expressionS *exp) |
| 1157 | { |
| 1158 | int i; |
| 1159 | |
| 1160 | if (exp->X_op != O_register) |
| 1161 | return NULL; |
| 1162 | |
| 1163 | /* Find the name of the register. */ |
| 1164 | for (i = d10v_reg_name_cnt (); i--;) |
| 1165 | if (d10v_predefined_registers[i].value == exp->X_add_number) |
| 1166 | break; |
| 1167 | |
| 1168 | if (i < 0) |
| 1169 | abort (); |
| 1170 | |
| 1171 | /* Now see if a symbol has been defined with the same name. */ |
| 1172 | return symbol_find (d10v_predefined_registers[i].name); |
| 1173 | } |
| 1174 | |
| 1175 | /* Get a pointer to an entry in the opcode table. |
| 1176 | The function must look at all opcodes with the same name and use |
| 1177 | the operands to choose the correct opcode. */ |
| 1178 | |
| 1179 | static struct d10v_opcode * |
| 1180 | find_opcode (struct d10v_opcode *opcode, expressionS myops[]) |
| 1181 | { |
| 1182 | int i, match; |
| 1183 | struct d10v_opcode *next_opcode; |
| 1184 | |
| 1185 | /* Get all the operands and save them as expressions. */ |
| 1186 | get_operands (myops); |
| 1187 | |
| 1188 | /* Now see if the operand is a fake. If so, find the correct size |
| 1189 | instruction, if possible. */ |
| 1190 | if (opcode->format == OPCODE_FAKE) |
| 1191 | { |
| 1192 | int opnum = opcode->operands[0]; |
| 1193 | int flags; |
| 1194 | |
| 1195 | if (myops[opnum].X_op == O_register) |
| 1196 | { |
| 1197 | myops[opnum].X_op = O_symbol; |
| 1198 | myops[opnum].X_add_symbol = |
| 1199 | symbol_find_or_make ((char *) myops[opnum].X_op_symbol); |
| 1200 | myops[opnum].X_add_number = 0; |
| 1201 | myops[opnum].X_op_symbol = NULL; |
| 1202 | } |
| 1203 | |
| 1204 | next_opcode = opcode + 1; |
| 1205 | |
| 1206 | /* If the first operand is supposed to be a register, make sure |
| 1207 | we got a valid one. */ |
| 1208 | flags = d10v_operands[next_opcode->operands[0]].flags; |
| 1209 | if (flags & OPERAND_REG) |
| 1210 | { |
| 1211 | int X_op = myops[0].X_op; |
| 1212 | int num = myops[0].X_add_number; |
| 1213 | |
| 1214 | if (X_op != O_register |
| 1215 | || (num & ~flags |
| 1216 | & (OPERAND_GPR | OPERAND_ACC0 | OPERAND_ACC1 |
| 1217 | | OPERAND_FFLAG | OPERAND_CFLAG | OPERAND_CONTROL)) |
| 1218 | || ((flags & OPERAND_SP) && ! (num & OPERAND_SP))) |
| 1219 | { |
| 1220 | as_bad (_("bad opcode or operands")); |
| 1221 | return 0; |
| 1222 | } |
| 1223 | } |
| 1224 | |
| 1225 | if (myops[opnum].X_op == O_constant |
| 1226 | || (myops[opnum].X_op == O_symbol |
| 1227 | && S_IS_DEFINED (myops[opnum].X_add_symbol) |
| 1228 | && (S_GET_SEGMENT (myops[opnum].X_add_symbol) == now_seg))) |
| 1229 | { |
| 1230 | for (i = 0; opcode->operands[i + 1]; i++) |
| 1231 | { |
| 1232 | int bits = d10v_operands[next_opcode->operands[opnum]].bits; |
| 1233 | int flags = d10v_operands[next_opcode->operands[opnum]].flags; |
| 1234 | if (flags & OPERAND_ADDR) |
| 1235 | bits += 2; |
| 1236 | |
| 1237 | if (myops[opnum].X_op == O_constant) |
| 1238 | { |
| 1239 | if (!check_range (myops[opnum].X_add_number, bits, flags)) |
| 1240 | break; |
| 1241 | } |
| 1242 | else |
| 1243 | { |
| 1244 | fragS *sym_frag; |
| 1245 | fragS *f; |
| 1246 | unsigned long current_position; |
| 1247 | unsigned long symbol_position; |
| 1248 | unsigned long value; |
| 1249 | bfd_boolean found_symbol; |
| 1250 | |
| 1251 | /* Calculate the address of the current instruction |
| 1252 | and the address of the symbol. Do this by summing |
| 1253 | the offsets of previous frags until we reach the |
| 1254 | frag containing the symbol, and the current frag. */ |
| 1255 | sym_frag = symbol_get_frag (myops[opnum].X_add_symbol); |
| 1256 | found_symbol = FALSE; |
| 1257 | |
| 1258 | current_position = |
| 1259 | obstack_next_free (&frchain_now->frch_obstack) |
| 1260 | - frag_now->fr_literal; |
| 1261 | symbol_position = S_GET_VALUE (myops[opnum].X_add_symbol); |
| 1262 | |
| 1263 | for (f = frchain_now->frch_root; f; f = f->fr_next) |
| 1264 | { |
| 1265 | current_position += f->fr_fix + f->fr_offset; |
| 1266 | |
| 1267 | if (f == sym_frag) |
| 1268 | found_symbol = TRUE; |
| 1269 | |
| 1270 | if (! found_symbol) |
| 1271 | symbol_position += f->fr_fix + f->fr_offset; |
| 1272 | } |
| 1273 | |
| 1274 | value = symbol_position; |
| 1275 | |
| 1276 | if (flags & OPERAND_ADDR) |
| 1277 | value -= current_position; |
| 1278 | |
| 1279 | if (AT_WORD_P (&myops[opnum])) |
| 1280 | { |
| 1281 | if (bits > 4) |
| 1282 | { |
| 1283 | bits += 2; |
| 1284 | if (!check_range (value, bits, flags)) |
| 1285 | break; |
| 1286 | } |
| 1287 | } |
| 1288 | else if (!check_range (value, bits, flags)) |
| 1289 | break; |
| 1290 | } |
| 1291 | next_opcode++; |
| 1292 | } |
| 1293 | |
| 1294 | if (opcode->operands [i + 1] == 0) |
| 1295 | as_fatal (_("value out of range")); |
| 1296 | else |
| 1297 | opcode = next_opcode; |
| 1298 | } |
| 1299 | else |
| 1300 | /* Not a constant, so use a long instruction. */ |
| 1301 | opcode += 2; |
| 1302 | } |
| 1303 | |
| 1304 | match = 0; |
| 1305 | |
| 1306 | /* Now search the opcode table table for one with operands |
| 1307 | that matches what we've got. */ |
| 1308 | while (!match) |
| 1309 | { |
| 1310 | match = 1; |
| 1311 | for (i = 0; opcode->operands[i]; i++) |
| 1312 | { |
| 1313 | int flags = d10v_operands[opcode->operands[i]].flags; |
| 1314 | int X_op = myops[i].X_op; |
| 1315 | int num = myops[i].X_add_number; |
| 1316 | |
| 1317 | if (X_op == 0) |
| 1318 | { |
| 1319 | match = 0; |
| 1320 | break; |
| 1321 | } |
| 1322 | |
| 1323 | if (flags & OPERAND_REG) |
| 1324 | { |
| 1325 | if ((X_op != O_register) |
| 1326 | || (num & ~flags |
| 1327 | & (OPERAND_GPR | OPERAND_ACC0 | OPERAND_ACC1 |
| 1328 | | OPERAND_FFLAG | OPERAND_CFLAG |
| 1329 | | OPERAND_CONTROL)) |
| 1330 | || ((flags & OPERAND_SP) && ! (num & OPERAND_SP))) |
| 1331 | { |
| 1332 | match = 0; |
| 1333 | break; |
| 1334 | } |
| 1335 | } |
| 1336 | |
| 1337 | if (((flags & OPERAND_MINUS) && ((X_op != O_absent) || (num != OPERAND_MINUS))) || |
| 1338 | ((flags & OPERAND_PLUS) && ((X_op != O_absent) || (num != OPERAND_PLUS))) || |
| 1339 | ((flags & OPERAND_ATMINUS) && ((X_op != O_absent) || (num != OPERAND_ATMINUS))) || |
| 1340 | ((flags & OPERAND_ATPAR) && ((X_op != O_absent) || (num != OPERAND_ATPAR))) || |
| 1341 | ((flags & OPERAND_ATSIGN) && ((X_op != O_absent) || ((num != OPERAND_ATSIGN) && (num != OPERAND_ATPAR))))) |
| 1342 | { |
| 1343 | match = 0; |
| 1344 | break; |
| 1345 | } |
| 1346 | |
| 1347 | /* Unfortunately, for the indirect operand in instructions such |
| 1348 | as ``ldb r1, @(c,r14)'' this function can be passed |
| 1349 | X_op == O_register (because 'c' is a valid register name). |
| 1350 | However we cannot just ignore the case when X_op == O_register |
| 1351 | but flags & OPERAND_REG is null, so we check to see if a symbol |
| 1352 | of the same name as the register exists. If the symbol does |
| 1353 | exist, then the parser was unable to distinguish the two cases |
| 1354 | and we fix things here. (Ref: PR14826) */ |
| 1355 | |
| 1356 | if (!(flags & OPERAND_REG) && (X_op == O_register)) |
| 1357 | { |
| 1358 | symbolS * sym; |
| 1359 | |
| 1360 | sym = find_symbol_matching_register (& myops[i]); |
| 1361 | |
| 1362 | if (sym != NULL) |
| 1363 | { |
| 1364 | myops[i].X_op = X_op = O_symbol; |
| 1365 | myops[i].X_add_symbol = sym; |
| 1366 | } |
| 1367 | else |
| 1368 | as_bad |
| 1369 | (_("illegal operand - register name found where none expected")); |
| 1370 | } |
| 1371 | } |
| 1372 | |
| 1373 | /* We're only done if the operands matched so far AND there |
| 1374 | are no more to check. */ |
| 1375 | if (match && myops[i].X_op == 0) |
| 1376 | break; |
| 1377 | else |
| 1378 | match = 0; |
| 1379 | |
| 1380 | next_opcode = opcode + 1; |
| 1381 | |
| 1382 | if (next_opcode->opcode == 0) |
| 1383 | break; |
| 1384 | |
| 1385 | if (strcmp (next_opcode->name, opcode->name)) |
| 1386 | break; |
| 1387 | |
| 1388 | opcode = next_opcode; |
| 1389 | } |
| 1390 | |
| 1391 | if (!match) |
| 1392 | { |
| 1393 | as_bad (_("bad opcode or operands")); |
| 1394 | return 0; |
| 1395 | } |
| 1396 | |
| 1397 | /* Check that all registers that are required to be even are. |
| 1398 | Also, if any operands were marked as registers, but were really symbols, |
| 1399 | fix that here. */ |
| 1400 | for (i = 0; opcode->operands[i]; i++) |
| 1401 | { |
| 1402 | if ((d10v_operands[opcode->operands[i]].flags & OPERAND_EVEN) && |
| 1403 | (myops[i].X_add_number & 1)) |
| 1404 | as_fatal (_("Register number must be EVEN")); |
| 1405 | if ((d10v_operands[opcode->operands[i]].flags & OPERAND_NOSP) |
| 1406 | && (myops[i].X_add_number & OPERAND_SP)) |
| 1407 | as_bad (_("Unsupported use of sp")); |
| 1408 | if (myops[i].X_op == O_register) |
| 1409 | { |
| 1410 | if (!(d10v_operands[opcode->operands[i]].flags & OPERAND_REG)) |
| 1411 | { |
| 1412 | myops[i].X_op = O_symbol; |
| 1413 | myops[i].X_add_symbol = |
| 1414 | symbol_find_or_make ((char *) myops[i].X_op_symbol); |
| 1415 | myops[i].X_add_number = 0; |
| 1416 | myops[i].X_op_symbol = NULL; |
| 1417 | } |
| 1418 | } |
| 1419 | if ((d10v_operands[opcode->operands[i]].flags & OPERAND_CONTROL) |
| 1420 | && (myops[i].X_add_number == OPERAND_CONTROL + 4 |
| 1421 | || myops[i].X_add_number == OPERAND_CONTROL + 5 |
| 1422 | || myops[i].X_add_number == OPERAND_CONTROL + 6 |
| 1423 | || myops[i].X_add_number == OPERAND_CONTROL + 12 |
| 1424 | || myops[i].X_add_number == OPERAND_CONTROL + 13 |
| 1425 | || myops[i].X_add_number == OPERAND_CONTROL + 15)) |
| 1426 | as_warn (_("cr%ld is a reserved control register"), |
| 1427 | myops[i].X_add_number - OPERAND_CONTROL); |
| 1428 | } |
| 1429 | return opcode; |
| 1430 | } |
| 1431 | |
| 1432 | /* Assemble a single instruction. |
| 1433 | Return an opcode, or -1 (an invalid opcode) on error. */ |
| 1434 | |
| 1435 | static unsigned long |
| 1436 | do_assemble (char *str, struct d10v_opcode **opcode) |
| 1437 | { |
| 1438 | unsigned char *op_start, *op_end; |
| 1439 | char *save; |
| 1440 | char name[20]; |
| 1441 | int nlen = 0; |
| 1442 | expressionS myops[6]; |
| 1443 | |
| 1444 | /* Drop leading whitespace. */ |
| 1445 | while (*str == ' ') |
| 1446 | str++; |
| 1447 | |
| 1448 | /* Find the opcode end. */ |
| 1449 | for (op_start = op_end = (unsigned char *) str; |
| 1450 | *op_end && nlen < 20 && !is_end_of_line[*op_end] && *op_end != ' '; |
| 1451 | op_end++) |
| 1452 | { |
| 1453 | name[nlen] = TOLOWER (op_start[nlen]); |
| 1454 | nlen++; |
| 1455 | } |
| 1456 | name[nlen] = 0; |
| 1457 | |
| 1458 | if (nlen == 0) |
| 1459 | return -1; |
| 1460 | |
| 1461 | /* Find the first opcode with the proper name. */ |
| 1462 | *opcode = (struct d10v_opcode *) hash_find (d10v_hash, name); |
| 1463 | if (*opcode == NULL) |
| 1464 | return -1; |
| 1465 | |
| 1466 | save = input_line_pointer; |
| 1467 | input_line_pointer = (char *) op_end; |
| 1468 | *opcode = find_opcode (*opcode, myops); |
| 1469 | if (*opcode == 0) |
| 1470 | return -1; |
| 1471 | input_line_pointer = save; |
| 1472 | |
| 1473 | return build_insn ((*opcode), myops, 0); |
| 1474 | } |
| 1475 | |
| 1476 | /* If while processing a fixup, a reloc really needs to be created. |
| 1477 | Then it is done here. */ |
| 1478 | |
| 1479 | arelent * |
| 1480 | tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED, fixS *fixp) |
| 1481 | { |
| 1482 | arelent *reloc; |
| 1483 | reloc = xmalloc (sizeof (arelent)); |
| 1484 | reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); |
| 1485 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); |
| 1486 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; |
| 1487 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); |
| 1488 | if (reloc->howto == (reloc_howto_type *) NULL) |
| 1489 | { |
| 1490 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 1491 | _("reloc %d not supported by object file format"), |
| 1492 | (int) fixp->fx_r_type); |
| 1493 | return NULL; |
| 1494 | } |
| 1495 | |
| 1496 | if (fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY) |
| 1497 | reloc->address = fixp->fx_offset; |
| 1498 | |
| 1499 | reloc->addend = 0; |
| 1500 | |
| 1501 | return reloc; |
| 1502 | } |
| 1503 | |
| 1504 | int |
| 1505 | md_estimate_size_before_relax (fragS *fragp ATTRIBUTE_UNUSED, |
| 1506 | asection *seg ATTRIBUTE_UNUSED) |
| 1507 | { |
| 1508 | abort (); |
| 1509 | return 0; |
| 1510 | } |
| 1511 | |
| 1512 | long |
| 1513 | md_pcrel_from_section (fixS *fixp, segT sec) |
| 1514 | { |
| 1515 | if (fixp->fx_addsy != (symbolS *) NULL |
| 1516 | && (!S_IS_DEFINED (fixp->fx_addsy) |
| 1517 | || (S_GET_SEGMENT (fixp->fx_addsy) != sec))) |
| 1518 | return 0; |
| 1519 | return fixp->fx_frag->fr_address + fixp->fx_where; |
| 1520 | } |
| 1521 | |
| 1522 | void |
| 1523 | md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED) |
| 1524 | { |
| 1525 | char *where; |
| 1526 | unsigned long insn; |
| 1527 | long value = *valP; |
| 1528 | int op_type; |
| 1529 | int left = 0; |
| 1530 | |
| 1531 | if (fixP->fx_addsy == (symbolS *) NULL) |
| 1532 | fixP->fx_done = 1; |
| 1533 | |
| 1534 | /* We don't actually support subtracting a symbol. */ |
| 1535 | if (fixP->fx_subsy != (symbolS *) NULL) |
| 1536 | as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex")); |
| 1537 | |
| 1538 | op_type = fixP->fx_r_type; |
| 1539 | if (op_type & 2048) |
| 1540 | { |
| 1541 | op_type -= 2048; |
| 1542 | if (op_type & 1024) |
| 1543 | { |
| 1544 | op_type -= 1024; |
| 1545 | fixP->fx_r_type = BFD_RELOC_D10V_10_PCREL_L; |
| 1546 | left = 1; |
| 1547 | } |
| 1548 | else if (op_type & 4096) |
| 1549 | { |
| 1550 | op_type -= 4096; |
| 1551 | fixP->fx_r_type = BFD_RELOC_D10V_18; |
| 1552 | } |
| 1553 | else |
| 1554 | fixP->fx_r_type = |
| 1555 | get_reloc ((struct d10v_operand *) &d10v_operands[op_type]); |
| 1556 | } |
| 1557 | |
| 1558 | /* Fetch the instruction, insert the fully resolved operand |
| 1559 | value, and stuff the instruction back again. */ |
| 1560 | where = fixP->fx_frag->fr_literal + fixP->fx_where; |
| 1561 | insn = bfd_getb32 ((unsigned char *) where); |
| 1562 | |
| 1563 | switch (fixP->fx_r_type) |
| 1564 | { |
| 1565 | case BFD_RELOC_D10V_10_PCREL_L: |
| 1566 | case BFD_RELOC_D10V_10_PCREL_R: |
| 1567 | case BFD_RELOC_D10V_18_PCREL: |
| 1568 | /* If the fix is relative to a global symbol, not a section |
| 1569 | symbol, then ignore the offset. |
| 1570 | XXX - Do we have to worry about branches to a symbol + offset ? */ |
| 1571 | if (fixP->fx_addsy != NULL |
| 1572 | && S_IS_EXTERNAL (fixP->fx_addsy) ) |
| 1573 | { |
| 1574 | segT fseg = S_GET_SEGMENT (fixP->fx_addsy); |
| 1575 | segment_info_type *segf = seg_info(fseg); |
| 1576 | |
| 1577 | if ( segf && segf->sym != fixP->fx_addsy) |
| 1578 | value = 0; |
| 1579 | } |
| 1580 | /* Drop through. */ |
| 1581 | case BFD_RELOC_D10V_18: |
| 1582 | /* Instruction addresses are always right-shifted by 2. */ |
| 1583 | value >>= AT_WORD_RIGHT_SHIFT; |
| 1584 | if (fixP->fx_size == 2) |
| 1585 | bfd_putb16 ((bfd_vma) value, (unsigned char *) where); |
| 1586 | else |
| 1587 | { |
| 1588 | struct d10v_opcode *rep, *repi; |
| 1589 | |
| 1590 | rep = (struct d10v_opcode *) hash_find (d10v_hash, "rep"); |
| 1591 | repi = (struct d10v_opcode *) hash_find (d10v_hash, "repi"); |
| 1592 | if ((insn & FM11) == FM11 |
| 1593 | && ((repi != NULL |
| 1594 | && (insn & repi->mask) == (unsigned) repi->opcode) |
| 1595 | || (rep != NULL |
| 1596 | && (insn & rep->mask) == (unsigned) rep->opcode)) |
| 1597 | && value < 4) |
| 1598 | as_fatal |
| 1599 | (_("line %d: rep or repi must include at least 4 instructions"), |
| 1600 | fixP->fx_line); |
| 1601 | insn = |
| 1602 | d10v_insert_operand (insn, op_type, (offsetT) value, left, fixP); |
| 1603 | bfd_putb32 ((bfd_vma) insn, (unsigned char *) where); |
| 1604 | } |
| 1605 | break; |
| 1606 | case BFD_RELOC_32: |
| 1607 | bfd_putb32 ((bfd_vma) value, (unsigned char *) where); |
| 1608 | break; |
| 1609 | case BFD_RELOC_16: |
| 1610 | bfd_putb16 ((bfd_vma) value, (unsigned char *) where); |
| 1611 | break; |
| 1612 | |
| 1613 | case BFD_RELOC_VTABLE_INHERIT: |
| 1614 | case BFD_RELOC_VTABLE_ENTRY: |
| 1615 | fixP->fx_done = 0; |
| 1616 | return; |
| 1617 | |
| 1618 | default: |
| 1619 | as_fatal (_("line %d: unknown relocation type: 0x%x"), |
| 1620 | fixP->fx_line, fixP->fx_r_type); |
| 1621 | } |
| 1622 | } |
| 1623 | |
| 1624 | /* d10v_cleanup() is called after the assembler has finished parsing |
| 1625 | the input file, when a label is read from the input file, or when a |
| 1626 | stab directive is output. Because the D10V assembler sometimes |
| 1627 | saves short instructions to see if it can package them with the |
| 1628 | next instruction, there may be a short instruction that still needs |
| 1629 | to be written. |
| 1630 | |
| 1631 | NOTE: accesses a global, etype. |
| 1632 | NOTE: invoked by various macros such as md_cleanup: see. */ |
| 1633 | |
| 1634 | int |
| 1635 | d10v_cleanup (void) |
| 1636 | { |
| 1637 | segT seg; |
| 1638 | subsegT subseg; |
| 1639 | |
| 1640 | /* If cleanup was invoked because the assembler encountered, e.g., a |
| 1641 | user label, we write out the pending instruction, if any. If it |
| 1642 | was invoked because the assembler is outputting a piece of line |
| 1643 | debugging information, though, we write out the pending |
| 1644 | instruction only if the --no-gstabs-packing command line switch |
| 1645 | has been specified. */ |
| 1646 | if (prev_opcode |
| 1647 | && etype == PACK_UNSPEC |
| 1648 | && (! outputting_stabs_line_debug || ! flag_allow_gstabs_packing)) |
| 1649 | { |
| 1650 | seg = now_seg; |
| 1651 | subseg = now_subseg; |
| 1652 | |
| 1653 | if (prev_seg) |
| 1654 | subseg_set (prev_seg, prev_subseg); |
| 1655 | |
| 1656 | write_1_short (prev_opcode, prev_insn, fixups->next); |
| 1657 | subseg_set (seg, subseg); |
| 1658 | prev_opcode = NULL; |
| 1659 | } |
| 1660 | return 1; |
| 1661 | } |
| 1662 | |
| 1663 | /* Like normal .word, except support @word. |
| 1664 | Clobbers input_line_pointer, checks end-of-line. */ |
| 1665 | |
| 1666 | static void |
| 1667 | d10v_dot_word (int dummy ATTRIBUTE_UNUSED) |
| 1668 | { |
| 1669 | expressionS exp; |
| 1670 | char *p; |
| 1671 | |
| 1672 | if (is_it_end_of_statement ()) |
| 1673 | { |
| 1674 | demand_empty_rest_of_line (); |
| 1675 | return; |
| 1676 | } |
| 1677 | |
| 1678 | do |
| 1679 | { |
| 1680 | expression (&exp); |
| 1681 | if (!strncasecmp (input_line_pointer, "@word", 5)) |
| 1682 | { |
| 1683 | exp.X_add_number = 0; |
| 1684 | input_line_pointer += 5; |
| 1685 | |
| 1686 | p = frag_more (2); |
| 1687 | fix_new_exp (frag_now, p - frag_now->fr_literal, 2, |
| 1688 | &exp, 0, BFD_RELOC_D10V_18); |
| 1689 | } |
| 1690 | else |
| 1691 | emit_expr (&exp, 2); |
| 1692 | } |
| 1693 | while (*input_line_pointer++ == ','); |
| 1694 | |
| 1695 | input_line_pointer--; /* Put terminator back into stream. */ |
| 1696 | demand_empty_rest_of_line (); |
| 1697 | } |
| 1698 | |
| 1699 | /* Mitsubishi asked that we support some old syntax that apparently |
| 1700 | had immediate operands starting with '#'. This is in some of their |
| 1701 | sample code but is not documented (although it appears in some |
| 1702 | examples in their assembler manual). For now, we'll solve this |
| 1703 | compatibility problem by simply ignoring any '#' at the beginning |
| 1704 | of an operand. */ |
| 1705 | |
| 1706 | /* Operands that begin with '#' should fall through to here. |
| 1707 | From expr.c. */ |
| 1708 | |
| 1709 | void |
| 1710 | md_operand (expressionS *expressionP) |
| 1711 | { |
| 1712 | if (*input_line_pointer == '#' && ! do_not_ignore_hash) |
| 1713 | { |
| 1714 | input_line_pointer++; |
| 1715 | expression (expressionP); |
| 1716 | } |
| 1717 | } |
| 1718 | |
| 1719 | bfd_boolean |
| 1720 | d10v_fix_adjustable (fixS *fixP) |
| 1721 | { |
| 1722 | /* We need the symbol name for the VTABLE entries. */ |
| 1723 | if (fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT |
| 1724 | || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY) |
| 1725 | return 0; |
| 1726 | |
| 1727 | return 1; |
| 1728 | } |
| 1729 | |
| 1730 | /* The target specific pseudo-ops which we support. */ |
| 1731 | const pseudo_typeS md_pseudo_table[] = |
| 1732 | { |
| 1733 | { "word", d10v_dot_word, 2 }, |
| 1734 | { NULL, NULL, 0 } |
| 1735 | }; |
| 1736 | |
| 1737 | void |
| 1738 | md_assemble (char *str) |
| 1739 | { |
| 1740 | /* etype is saved extype. For multi-line instructions. */ |
| 1741 | packing_type extype = PACK_UNSPEC; /* Parallel, etc. */ |
| 1742 | struct d10v_opcode *opcode; |
| 1743 | unsigned long insn; |
| 1744 | char *str2; |
| 1745 | |
| 1746 | if (etype == PACK_UNSPEC) |
| 1747 | { |
| 1748 | /* Look for the special multiple instruction separators. */ |
| 1749 | str2 = strstr (str, "||"); |
| 1750 | if (str2) |
| 1751 | extype = PACK_PARALLEL; |
| 1752 | else |
| 1753 | { |
| 1754 | str2 = strstr (str, "->"); |
| 1755 | if (str2) |
| 1756 | extype = PACK_LEFT_RIGHT; |
| 1757 | else |
| 1758 | { |
| 1759 | str2 = strstr (str, "<-"); |
| 1760 | if (str2) |
| 1761 | extype = PACK_RIGHT_LEFT; |
| 1762 | } |
| 1763 | } |
| 1764 | |
| 1765 | /* str2 points to the separator, if there is one. */ |
| 1766 | if (str2) |
| 1767 | { |
| 1768 | *str2 = 0; |
| 1769 | |
| 1770 | /* If two instructions are present and we already have one saved, |
| 1771 | then first write out the saved one. */ |
| 1772 | d10v_cleanup (); |
| 1773 | |
| 1774 | /* Assemble first instruction and save it. */ |
| 1775 | prev_insn = do_assemble (str, &prev_opcode); |
| 1776 | prev_seg = now_seg; |
| 1777 | prev_subseg = now_subseg; |
| 1778 | if (prev_insn == (unsigned long) -1) |
| 1779 | as_fatal (_("can't find previous opcode ")); |
| 1780 | fixups = fixups->next; |
| 1781 | str = str2 + 2; |
| 1782 | } |
| 1783 | } |
| 1784 | |
| 1785 | insn = do_assemble (str, &opcode); |
| 1786 | if (insn == (unsigned long) -1) |
| 1787 | { |
| 1788 | if (extype != PACK_UNSPEC) |
| 1789 | etype = extype; |
| 1790 | else |
| 1791 | as_bad (_("could not assemble: %s"), str); |
| 1792 | return; |
| 1793 | } |
| 1794 | |
| 1795 | if (etype != PACK_UNSPEC) |
| 1796 | { |
| 1797 | extype = etype; |
| 1798 | etype = PACK_UNSPEC; |
| 1799 | } |
| 1800 | |
| 1801 | /* If this is a long instruction, write it and any previous short |
| 1802 | instruction. */ |
| 1803 | if (opcode->format & LONG_OPCODE) |
| 1804 | { |
| 1805 | if (extype != PACK_UNSPEC) |
| 1806 | as_fatal (_("Unable to mix instructions as specified")); |
| 1807 | d10v_cleanup (); |
| 1808 | write_long (insn, fixups); |
| 1809 | prev_opcode = NULL; |
| 1810 | return; |
| 1811 | } |
| 1812 | |
| 1813 | if (prev_opcode |
| 1814 | && prev_seg |
| 1815 | && ((prev_seg != now_seg) || (prev_subseg != now_subseg))) |
| 1816 | d10v_cleanup (); |
| 1817 | |
| 1818 | if (prev_opcode |
| 1819 | && (0 == write_2_short (prev_opcode, prev_insn, opcode, insn, extype, |
| 1820 | fixups))) |
| 1821 | { |
| 1822 | /* No instructions saved. */ |
| 1823 | prev_opcode = NULL; |
| 1824 | } |
| 1825 | else |
| 1826 | { |
| 1827 | if (extype != PACK_UNSPEC) |
| 1828 | as_fatal (_("Unable to mix instructions as specified")); |
| 1829 | /* Save last instruction so it may be packed on next pass. */ |
| 1830 | prev_opcode = opcode; |
| 1831 | prev_insn = insn; |
| 1832 | prev_seg = now_seg; |
| 1833 | prev_subseg = now_subseg; |
| 1834 | fixups = fixups->next; |
| 1835 | } |
| 1836 | } |
| 1837 | |