| 1 | /* tc-v850.c -- Assembler code for the NEC V850 |
| 2 | |
| 3 | Copyright (C) 1996 Free Software Foundation. |
| 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, 59 Temple Place - Suite 330, |
| 20 | Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | #include <stdio.h> |
| 23 | #include <ctype.h> |
| 24 | #include "as.h" |
| 25 | #include "subsegs.h" |
| 26 | #include "opcode/v850.h" |
| 27 | \f |
| 28 | /* Structure to hold information about predefined registers. */ |
| 29 | struct reg_name |
| 30 | { |
| 31 | const char *name; |
| 32 | int value; |
| 33 | }; |
| 34 | |
| 35 | /* Generic assembler global variables which must be defined by all targets. */ |
| 36 | |
| 37 | /* Characters which always start a comment. */ |
| 38 | const char comment_chars[] = "#"; |
| 39 | |
| 40 | /* Characters which start a comment at the beginning of a line. */ |
| 41 | const char line_comment_chars[] = ";#"; |
| 42 | |
| 43 | /* Characters which may be used to separate multiple commands on a |
| 44 | single line. */ |
| 45 | const char line_separator_chars[] = ";"; |
| 46 | |
| 47 | /* Characters which are used to indicate an exponent in a floating |
| 48 | point number. */ |
| 49 | const char EXP_CHARS[] = "eE"; |
| 50 | |
| 51 | /* Characters which mean that a number is a floating point constant, |
| 52 | as in 0d1.0. */ |
| 53 | const char FLT_CHARS[] = "dD"; |
| 54 | \f |
| 55 | /* local functions */ |
| 56 | static unsigned long v850_insert_operand |
| 57 | PARAMS ((unsigned long insn, const struct v850_operand *operand, |
| 58 | offsetT val, char *file, unsigned int line)); |
| 59 | static int reg_name_search PARAMS ((const struct reg_name *, int, const char *)); |
| 60 | static boolean register_name PARAMS ((expressionS *expressionP)); |
| 61 | static boolean system_register_name PARAMS ((expressionS *expressionP)); |
| 62 | static boolean cc_name PARAMS ((expressionS *expressionP)); |
| 63 | static int postfix PARAMS ((char *p)); |
| 64 | static bfd_reloc_code_real_type get_reloc PARAMS ((struct v850_operand *op)); |
| 65 | static unsigned long build_insn PARAMS ((struct v850_opcode *opcode, expressionS *opers)); |
| 66 | |
| 67 | |
| 68 | /* fixups */ |
| 69 | #define MAX_INSN_FIXUPS (5) |
| 70 | struct v850_fixup |
| 71 | { |
| 72 | expressionS exp; |
| 73 | int opindex; |
| 74 | bfd_reloc_code_real_type reloc; |
| 75 | }; |
| 76 | struct v850_fixup fixups[MAX_INSN_FIXUPS]; |
| 77 | static int fc; |
| 78 | \f |
| 79 | const char *md_shortopts = ""; |
| 80 | struct option md_longopts[] = { |
| 81 | {NULL, no_argument, NULL, 0} |
| 82 | }; |
| 83 | size_t md_longopts_size = sizeof(md_longopts); |
| 84 | |
| 85 | /* The target specific pseudo-ops which we support. */ |
| 86 | const pseudo_typeS md_pseudo_table[] = |
| 87 | { |
| 88 | /* |
| 89 | { "byte", ppc_byte, 0 }, |
| 90 | { "long", ppc_elf_cons, 4 }, |
| 91 | { "word", ppc_elf_cons, 2 }, |
| 92 | { "short", ppc_elf_cons, 2 }, |
| 93 | { "rdata", ppc_elf_rdata, 0 }, |
| 94 | { "rodata", ppc_elf_rdata, 0 }, |
| 95 | { "lcomm", ppc_elf_lcomm, 0 }, |
| 96 | */ |
| 97 | { NULL, NULL, 0 } |
| 98 | }; |
| 99 | |
| 100 | /* Opcode hash table. */ |
| 101 | static struct hash_control *v850_hash; |
| 102 | |
| 103 | /* This table is sorted. Suitable for searching by a binary search. */ |
| 104 | static const struct reg_name pre_defined_registers[] = |
| 105 | { |
| 106 | { "ep", 30 }, /* ep - element ptr */ |
| 107 | { "gp", 4 }, /* gp - global ptr */ |
| 108 | { "lp", 31 }, /* lp - link ptr */ |
| 109 | { "r0", 0 }, |
| 110 | { "r1", 1 }, |
| 111 | { "r10", 10 }, |
| 112 | { "r11", 11 }, |
| 113 | { "r12", 12 }, |
| 114 | { "r13", 13 }, |
| 115 | { "r14", 14 }, |
| 116 | { "r15", 15 }, |
| 117 | { "r16", 16 }, |
| 118 | { "r17", 17 }, |
| 119 | { "r18", 18 }, |
| 120 | { "r19", 19 }, |
| 121 | { "r2", 2 }, |
| 122 | { "r20", 20 }, |
| 123 | { "r21", 21 }, |
| 124 | { "r22", 22 }, |
| 125 | { "r23", 23 }, |
| 126 | { "r24", 24 }, |
| 127 | { "r25", 25 }, |
| 128 | { "r26", 26 }, |
| 129 | { "r27", 27 }, |
| 130 | { "r28", 28 }, |
| 131 | { "r29", 29 }, |
| 132 | { "r3", 3 }, |
| 133 | { "r30", 30 }, |
| 134 | { "r31", 31 }, |
| 135 | { "r4", 4 }, |
| 136 | { "r5", 5 }, |
| 137 | { "r6", 6 }, |
| 138 | { "r7", 7 }, |
| 139 | { "r8", 8 }, |
| 140 | { "r9", 9 }, |
| 141 | { "sp", 3 }, /* sp - stack ptr */ |
| 142 | { "tp", 5 }, /* tp - text ptr */ |
| 143 | { "zero", 0 }, |
| 144 | }; |
| 145 | #define REG_NAME_CNT (sizeof(pre_defined_registers) / sizeof(struct reg_name)) |
| 146 | |
| 147 | |
| 148 | static const struct reg_name system_registers[] = |
| 149 | { |
| 150 | { "eipc", 0 }, |
| 151 | { "eipsw", 1 }, |
| 152 | { "fepc", 2 }, |
| 153 | { "fepsw", 3 }, |
| 154 | { "ecr", 4 }, |
| 155 | { "psw", 5 }, |
| 156 | }; |
| 157 | #define SYSREG_NAME_CNT (sizeof(system_registers) / sizeof(struct reg_name)) |
| 158 | |
| 159 | static const struct reg_name cc_names[] = |
| 160 | { |
| 161 | { "c", 0x1 }, |
| 162 | { "ge", 0xe }, |
| 163 | { "gt", 0xf }, |
| 164 | { "h", 0xb }, |
| 165 | { "l", 0x1 }, |
| 166 | { "le", 0x7 }, |
| 167 | { "lt", 0x6 }, |
| 168 | { "n", 0x4 }, |
| 169 | { "nc", 0x9 }, |
| 170 | { "nh", 0x3 }, |
| 171 | { "nl", 0x9 }, |
| 172 | { "ns", 0xc }, |
| 173 | { "nv", 0x8 }, |
| 174 | { "nz", 0xa }, |
| 175 | { "p", 0xc }, |
| 176 | { "s", 0x4 }, |
| 177 | { "sa", 0xd }, |
| 178 | { "t", 0x5 }, |
| 179 | { "v", 0x0 }, |
| 180 | { "z", 0x2 }, |
| 181 | }; |
| 182 | #define CC_NAME_CNT (sizeof(cc_names) / sizeof(struct reg_name)) |
| 183 | |
| 184 | /* reg_name_search does a binary search of the given register table |
| 185 | to see if "name" is a valid regiter name. Returns the register |
| 186 | number from the array on success, or -1 on failure. */ |
| 187 | |
| 188 | static int |
| 189 | reg_name_search (regs, regcount, name) |
| 190 | const struct reg_name *regs; |
| 191 | int regcount; |
| 192 | const char *name; |
| 193 | { |
| 194 | int middle, low, high; |
| 195 | int cmp; |
| 196 | |
| 197 | low = 0; |
| 198 | high = regcount - 1; |
| 199 | |
| 200 | do |
| 201 | { |
| 202 | middle = (low + high) / 2; |
| 203 | cmp = strcasecmp (name, regs[middle].name); |
| 204 | if (cmp < 0) |
| 205 | high = middle - 1; |
| 206 | else if (cmp > 0) |
| 207 | low = middle + 1; |
| 208 | else |
| 209 | return regs[middle].value; |
| 210 | } |
| 211 | while (low <= high); |
| 212 | return -1; |
| 213 | } |
| 214 | |
| 215 | |
| 216 | /* Summary of register_name(). |
| 217 | * |
| 218 | * in: Input_line_pointer points to 1st char of operand. |
| 219 | * |
| 220 | * out: A expressionS. |
| 221 | * The operand may have been a register: in this case, X_op == O_register, |
| 222 | * X_add_number is set to the register number, and truth is returned. |
| 223 | * Input_line_pointer->(next non-blank) char after operand, or is in |
| 224 | * its original state. |
| 225 | */ |
| 226 | static boolean |
| 227 | register_name (expressionP) |
| 228 | expressionS *expressionP; |
| 229 | { |
| 230 | int reg_number; |
| 231 | char *name; |
| 232 | char *start; |
| 233 | char c; |
| 234 | |
| 235 | /* Find the spelling of the operand */ |
| 236 | start = name = input_line_pointer; |
| 237 | |
| 238 | c = get_symbol_end (); |
| 239 | reg_number = reg_name_search (pre_defined_registers, REG_NAME_CNT, name); |
| 240 | |
| 241 | /* look to see if it's in the register table */ |
| 242 | if (reg_number >= 0) |
| 243 | { |
| 244 | expressionP->X_op = O_register; |
| 245 | expressionP->X_add_number = reg_number; |
| 246 | |
| 247 | /* make the rest nice */ |
| 248 | expressionP->X_add_symbol = NULL; |
| 249 | expressionP->X_op_symbol = NULL; |
| 250 | *input_line_pointer = c; /* put back the delimiting char */ |
| 251 | return true; |
| 252 | } |
| 253 | else |
| 254 | { |
| 255 | /* reset the line as if we had not done anything */ |
| 256 | *input_line_pointer = c; /* put back the delimiting char */ |
| 257 | input_line_pointer = start; /* reset input_line pointer */ |
| 258 | return false; |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | /* Summary of system_register_name(). |
| 263 | * |
| 264 | * in: Input_line_pointer points to 1st char of operand. |
| 265 | * |
| 266 | * out: A expressionS. |
| 267 | * The operand may have been a register: in this case, X_op == O_register, |
| 268 | * X_add_number is set to the register number, and truth is returned. |
| 269 | * Input_line_pointer->(next non-blank) char after operand, or is in |
| 270 | * its original state. |
| 271 | */ |
| 272 | static boolean |
| 273 | system_register_name (expressionP) |
| 274 | expressionS *expressionP; |
| 275 | { |
| 276 | int reg_number; |
| 277 | char *name; |
| 278 | char *start; |
| 279 | char c; |
| 280 | |
| 281 | /* Find the spelling of the operand */ |
| 282 | start = name = input_line_pointer; |
| 283 | |
| 284 | c = get_symbol_end (); |
| 285 | reg_number = reg_name_search (system_registers, SYSREG_NAME_CNT, name); |
| 286 | |
| 287 | /* look to see if it's in the register table */ |
| 288 | if (reg_number >= 0) |
| 289 | { |
| 290 | expressionP->X_op = O_register; |
| 291 | expressionP->X_add_number = reg_number; |
| 292 | |
| 293 | /* make the rest nice */ |
| 294 | expressionP->X_add_symbol = NULL; |
| 295 | expressionP->X_op_symbol = NULL; |
| 296 | *input_line_pointer = c; /* put back the delimiting char */ |
| 297 | return true; |
| 298 | } |
| 299 | else |
| 300 | { |
| 301 | /* reset the line as if we had not done anything */ |
| 302 | *input_line_pointer = c; /* put back the delimiting char */ |
| 303 | input_line_pointer = start; /* reset input_line pointer */ |
| 304 | return false; |
| 305 | } |
| 306 | } |
| 307 | |
| 308 | /* Summary of cc_name(). |
| 309 | * |
| 310 | * in: Input_line_pointer points to 1st char of operand. |
| 311 | * |
| 312 | * out: A expressionS. |
| 313 | * The operand may have been a register: in this case, X_op == O_register, |
| 314 | * X_add_number is set to the register number, and truth is returned. |
| 315 | * Input_line_pointer->(next non-blank) char after operand, or is in |
| 316 | * its original state. |
| 317 | */ |
| 318 | static boolean |
| 319 | cc_name (expressionP) |
| 320 | expressionS *expressionP; |
| 321 | { |
| 322 | int reg_number; |
| 323 | char *name; |
| 324 | char *start; |
| 325 | char c; |
| 326 | |
| 327 | /* Find the spelling of the operand */ |
| 328 | start = name = input_line_pointer; |
| 329 | |
| 330 | c = get_symbol_end (); |
| 331 | reg_number = reg_name_search (cc_names, CC_NAME_CNT, name); |
| 332 | |
| 333 | /* look to see if it's in the register table */ |
| 334 | if (reg_number >= 0) |
| 335 | { |
| 336 | expressionP->X_op = O_constant; |
| 337 | expressionP->X_add_number = reg_number; |
| 338 | |
| 339 | /* make the rest nice */ |
| 340 | expressionP->X_add_symbol = NULL; |
| 341 | expressionP->X_op_symbol = NULL; |
| 342 | *input_line_pointer = c; /* put back the delimiting char */ |
| 343 | return true; |
| 344 | } |
| 345 | else |
| 346 | { |
| 347 | /* reset the line as if we had not done anything */ |
| 348 | *input_line_pointer = c; /* put back the delimiting char */ |
| 349 | input_line_pointer = start; /* reset input_line pointer */ |
| 350 | return false; |
| 351 | } |
| 352 | } |
| 353 | |
| 354 | void |
| 355 | md_show_usage (stream) |
| 356 | FILE *stream; |
| 357 | { |
| 358 | fprintf(stream, "V850 options:\n\ |
| 359 | none yet\n"); |
| 360 | } |
| 361 | |
| 362 | int |
| 363 | md_parse_option (c, arg) |
| 364 | int c; |
| 365 | char *arg; |
| 366 | { |
| 367 | return 0; |
| 368 | } |
| 369 | |
| 370 | symbolS * |
| 371 | md_undefined_symbol (name) |
| 372 | char *name; |
| 373 | { |
| 374 | return 0; |
| 375 | } |
| 376 | |
| 377 | char * |
| 378 | md_atof (type, litp, sizep) |
| 379 | int type; |
| 380 | char *litp; |
| 381 | int *sizep; |
| 382 | { |
| 383 | int prec; |
| 384 | LITTLENUM_TYPE words[4]; |
| 385 | char *t; |
| 386 | int i; |
| 387 | |
| 388 | switch (type) |
| 389 | { |
| 390 | case 'f': |
| 391 | prec = 2; |
| 392 | break; |
| 393 | |
| 394 | case 'd': |
| 395 | prec = 4; |
| 396 | break; |
| 397 | |
| 398 | default: |
| 399 | *sizep = 0; |
| 400 | return "bad call to md_atof"; |
| 401 | } |
| 402 | |
| 403 | t = atof_ieee (input_line_pointer, type, words); |
| 404 | if (t) |
| 405 | input_line_pointer = t; |
| 406 | |
| 407 | *sizep = prec * 2; |
| 408 | |
| 409 | for (i = prec - 1; i >= 0; i--) |
| 410 | { |
| 411 | md_number_to_chars (litp, (valueT) words[i], 2); |
| 412 | litp += 2; |
| 413 | } |
| 414 | |
| 415 | return NULL; |
| 416 | } |
| 417 | |
| 418 | |
| 419 | void |
| 420 | md_convert_frag (abfd, sec, fragP) |
| 421 | bfd *abfd; |
| 422 | asection *sec; |
| 423 | fragS *fragP; |
| 424 | { |
| 425 | /* printf ("call to md_convert_frag \n"); */ |
| 426 | abort (); |
| 427 | } |
| 428 | |
| 429 | valueT |
| 430 | md_section_align (seg, addr) |
| 431 | asection *seg; |
| 432 | valueT addr; |
| 433 | { |
| 434 | int align = bfd_get_section_alignment (stdoutput, seg); |
| 435 | return ((addr + (1 << align) - 1) & (-1 << align)); |
| 436 | } |
| 437 | |
| 438 | void |
| 439 | md_begin () |
| 440 | { |
| 441 | char *prev_name = ""; |
| 442 | register const struct v850_opcode *op; |
| 443 | const struct v850_opcode *op_end; |
| 444 | |
| 445 | v850_hash = hash_new(); |
| 446 | |
| 447 | /* Insert unique names into hash table. The V850 instruction set |
| 448 | has many identical opcode names that have different opcodes based |
| 449 | on the operands. This hash table then provides a quick index to |
| 450 | the first opcode with a particular name in the opcode table. */ |
| 451 | |
| 452 | op = v850_opcodes; |
| 453 | while (op->name) |
| 454 | { |
| 455 | if (strcmp (prev_name, op->name)) |
| 456 | { |
| 457 | prev_name = (char *) op->name; |
| 458 | hash_insert (v850_hash, op->name, (char *) op); |
| 459 | } |
| 460 | op++; |
| 461 | } |
| 462 | } |
| 463 | |
| 464 | |
| 465 | static bfd_reloc_code_real_type |
| 466 | v850_reloc_prefix() |
| 467 | { |
| 468 | if (strncmp(input_line_pointer, "hi0(", 4) == 0) |
| 469 | { |
| 470 | input_line_pointer += 4; |
| 471 | return BFD_RELOC_HI16; |
| 472 | } |
| 473 | if (strncmp(input_line_pointer, "hi(", 3) == 0) |
| 474 | { |
| 475 | input_line_pointer += 3; |
| 476 | return BFD_RELOC_HI16_S; |
| 477 | } |
| 478 | if (strncmp (input_line_pointer, "lo(", 3) == 0) |
| 479 | { |
| 480 | input_line_pointer += 3; |
| 481 | return BFD_RELOC_LO16; |
| 482 | } |
| 483 | |
| 484 | /* FIXME: implement sda, tda, zda here */ |
| 485 | |
| 486 | return BFD_RELOC_UNUSED; |
| 487 | } |
| 488 | |
| 489 | void |
| 490 | md_assemble (str) |
| 491 | char *str; |
| 492 | { |
| 493 | char *s; |
| 494 | struct v850_opcode *opcode; |
| 495 | struct v850_opcode *next_opcode; |
| 496 | const unsigned char *opindex_ptr; |
| 497 | int next_opindex; |
| 498 | unsigned long insn; |
| 499 | char *f; |
| 500 | int i; |
| 501 | int numops; |
| 502 | int match; |
| 503 | bfd_reloc_code_real_type reloc; |
| 504 | |
| 505 | int numopts; |
| 506 | expressionS myops[5]; |
| 507 | |
| 508 | /* Get the opcode. */ |
| 509 | for (s = str; *s != '\0' && ! isspace (*s); s++) |
| 510 | ; |
| 511 | if (*s != '\0') |
| 512 | *s++ = '\0'; |
| 513 | |
| 514 | /* find the first opcode with the proper name */ |
| 515 | opcode = (struct v850_opcode *)hash_find (v850_hash, str); |
| 516 | if (opcode == NULL) |
| 517 | { |
| 518 | as_bad ("Unrecognized opcode: `%s'", str); |
| 519 | return; |
| 520 | } |
| 521 | |
| 522 | str = s; |
| 523 | while (isspace (*str)) |
| 524 | ++str; |
| 525 | |
| 526 | input_line_pointer = str; |
| 527 | |
| 528 | for(;;) |
| 529 | { |
| 530 | const char *errmsg = NULL; |
| 531 | |
| 532 | fc = 0; |
| 533 | match = 0; |
| 534 | next_opindex = 0; |
| 535 | insn = opcode->opcode; |
| 536 | for (opindex_ptr = opcode->operands; *opindex_ptr != 0; opindex_ptr++) |
| 537 | { |
| 538 | const struct v850_operand *operand; |
| 539 | char *hold; |
| 540 | expressionS ex; |
| 541 | char endc; |
| 542 | |
| 543 | if (next_opindex == 0) |
| 544 | { |
| 545 | operand = &v850_operands[*opindex_ptr]; |
| 546 | } |
| 547 | else |
| 548 | { |
| 549 | operand = &v850_operands[next_opindex]; |
| 550 | next_opindex = 0; |
| 551 | } |
| 552 | |
| 553 | errmsg = NULL; |
| 554 | |
| 555 | while (*str == ' ' || *str == ',' || *str == '[' || *str == ']') |
| 556 | ++str; |
| 557 | |
| 558 | /* Gather the operand. */ |
| 559 | hold = input_line_pointer; |
| 560 | input_line_pointer = str; |
| 561 | |
| 562 | |
| 563 | /* lo(), hi(), hi0(), etc... */ |
| 564 | if ((reloc = v850_reloc_prefix()) != BFD_RELOC_UNUSED) |
| 565 | { |
| 566 | expression(&ex); |
| 567 | |
| 568 | if (*input_line_pointer++ != ')') |
| 569 | { |
| 570 | errmsg = "syntax error: expected `)'"; |
| 571 | goto error; |
| 572 | } |
| 573 | |
| 574 | if (ex.X_op == O_constant) |
| 575 | { |
| 576 | switch (reloc) |
| 577 | { |
| 578 | case BFD_RELOC_LO16: |
| 579 | ex.X_add_number &= 0xffff; |
| 580 | break; |
| 581 | |
| 582 | case BFD_RELOC_HI16: |
| 583 | ex.X_add_number = ((ex.X_add_number >> 16) & 0xffff); |
| 584 | break; |
| 585 | |
| 586 | case BFD_RELOC_HI16_S: |
| 587 | ex.X_add_number = ((ex.X_add_number >> 16) & 0xffff) |
| 588 | + ((ex.X_add_number >> 15) & 1); |
| 589 | break; |
| 590 | } |
| 591 | |
| 592 | insn = v850_insert_operand (insn, operand, ex.X_add_number, |
| 593 | (char *) NULL, 0); |
| 594 | } |
| 595 | else |
| 596 | { |
| 597 | if (fc > MAX_INSN_FIXUPS) |
| 598 | as_fatal ("too many fixups"); |
| 599 | |
| 600 | fixups[fc].exp = ex; |
| 601 | fixups[fc].opindex = *opindex_ptr; |
| 602 | fixups[fc].reloc = reloc; |
| 603 | fc++; |
| 604 | } |
| 605 | } |
| 606 | else |
| 607 | { |
| 608 | if ((operand->flags & V850_OPERAND_REG) != 0) |
| 609 | { |
| 610 | if (!register_name(&ex)) |
| 611 | { |
| 612 | errmsg = "invalid register name"; |
| 613 | goto error; |
| 614 | } |
| 615 | } |
| 616 | else if ((operand->flags & V850_OPERAND_SRG) != 0) |
| 617 | { |
| 618 | if (!system_register_name(&ex)) |
| 619 | { |
| 620 | errmsg = "invalid system register name"; |
| 621 | goto error; |
| 622 | } |
| 623 | } |
| 624 | else if ((operand->flags & V850_OPERAND_EP) != 0) |
| 625 | { |
| 626 | char *start = input_line_pointer; |
| 627 | char c = get_symbol_end (); |
| 628 | if (strcmp (start, "ep") != 0 && strcmp (start, "r30") != 0) |
| 629 | { |
| 630 | /* Put things back the way we found them. */ |
| 631 | *input_line_pointer = c; |
| 632 | input_line_pointer = start; |
| 633 | errmsg = "expected EP register"; |
| 634 | goto error; |
| 635 | } |
| 636 | *input_line_pointer = c; |
| 637 | str = input_line_pointer; |
| 638 | input_line_pointer = hold; |
| 639 | |
| 640 | while (*str == ' ' || *str == ',' || *str == '[' || *str == ']') |
| 641 | ++str; |
| 642 | continue; |
| 643 | } |
| 644 | else if ((operand->flags & V850_OPERAND_CC) != 0) |
| 645 | { |
| 646 | if (!cc_name(&ex)) |
| 647 | { |
| 648 | errmsg = "invalid condition code name"; |
| 649 | goto error; |
| 650 | } |
| 651 | } |
| 652 | else if (register_name (&ex) |
| 653 | && (operand->flags & V850_OPERAND_REG) == 0) |
| 654 | { |
| 655 | errmsg = "syntax error: register not expected"; |
| 656 | goto error; |
| 657 | } |
| 658 | else if (system_register_name (&ex) |
| 659 | && (operand->flags & V850_OPERAND_SRG) == 0) |
| 660 | { |
| 661 | errmsg = "syntax error: system register not expected"; |
| 662 | goto error; |
| 663 | } |
| 664 | else if (cc_name (&ex) |
| 665 | && (operand->flags & V850_OPERAND_CC) == 0) |
| 666 | { |
| 667 | errmsg = "syntax error: condition code not expected"; |
| 668 | goto error; |
| 669 | } |
| 670 | else |
| 671 | { |
| 672 | expression(&ex); |
| 673 | } |
| 674 | |
| 675 | switch (ex.X_op) |
| 676 | { |
| 677 | case O_illegal: |
| 678 | errmsg = "illegal operand"; |
| 679 | goto error; |
| 680 | case O_absent: |
| 681 | errmsg = "missing operand"; |
| 682 | goto error; |
| 683 | case O_register: |
| 684 | if ((operand->flags & (V850_OPERAND_REG | V850_OPERAND_SRG)) == 0) |
| 685 | { |
| 686 | errmsg = "invalid operand"; |
| 687 | goto error; |
| 688 | } |
| 689 | |
| 690 | insn = v850_insert_operand (insn, operand, ex.X_add_number, |
| 691 | (char *) NULL, 0); |
| 692 | break; |
| 693 | |
| 694 | case O_constant: |
| 695 | insn = v850_insert_operand (insn, operand, ex.X_add_number, |
| 696 | (char *) NULL, 0); |
| 697 | break; |
| 698 | |
| 699 | default: |
| 700 | /* We need to generate a fixup for this expression. */ |
| 701 | if (fc >= MAX_INSN_FIXUPS) |
| 702 | as_fatal ("too many fixups"); |
| 703 | fixups[fc].exp = ex; |
| 704 | fixups[fc].opindex = *opindex_ptr; |
| 705 | fixups[fc].reloc = BFD_RELOC_UNUSED; |
| 706 | ++fc; |
| 707 | break; |
| 708 | } |
| 709 | |
| 710 | } |
| 711 | |
| 712 | str = input_line_pointer; |
| 713 | input_line_pointer = hold; |
| 714 | |
| 715 | while (*str == ' ' || *str == ',' || *str == '[' || *str == ']') |
| 716 | ++str; |
| 717 | } |
| 718 | match = 1; |
| 719 | |
| 720 | error: |
| 721 | if (match == 0) |
| 722 | { |
| 723 | next_opcode = opcode + 1; |
| 724 | if (next_opcode->opcode != 0 && !strcmp(next_opcode->name, opcode->name)) |
| 725 | { |
| 726 | opcode = next_opcode; |
| 727 | continue; |
| 728 | } |
| 729 | |
| 730 | as_bad ("%s", errmsg); |
| 731 | return; |
| 732 | } |
| 733 | break; |
| 734 | } |
| 735 | |
| 736 | while (isspace (*str)) |
| 737 | ++str; |
| 738 | |
| 739 | if (*str != '\0') |
| 740 | as_bad ("junk at end of line: `%s'", str); |
| 741 | |
| 742 | input_line_pointer = str; |
| 743 | |
| 744 | /* Write out the instruction |
| 745 | FIXME: we can determine the size of the opcode by the instruction |
| 746 | pattern, it does not have to be stored in the opcode table. */ |
| 747 | f = frag_more (opcode->size); |
| 748 | md_number_to_chars (f, insn, opcode->size); |
| 749 | |
| 750 | |
| 751 | /* Create any fixups. At this point we do not use a |
| 752 | bfd_reloc_code_real_type, but instead just use the |
| 753 | BFD_RELOC_UNUSED plus the operand index. This lets us easily |
| 754 | handle fixups for any operand type, although that is admittedly |
| 755 | not a very exciting feature. We pick a BFD reloc type in |
| 756 | md_apply_fix. */ |
| 757 | for (i = 0; i < fc; i++) |
| 758 | { |
| 759 | const struct v850_operand *operand; |
| 760 | |
| 761 | operand = &v850_operands[fixups[i].opindex]; |
| 762 | if (fixups[i].reloc != BFD_RELOC_UNUSED) |
| 763 | { |
| 764 | reloc_howto_type *reloc_howto = bfd_reloc_type_lookup (stdoutput, fixups[i].reloc); |
| 765 | int size; |
| 766 | int offset; |
| 767 | fixS *fixP; |
| 768 | |
| 769 | if (!reloc_howto) |
| 770 | abort(); |
| 771 | |
| 772 | size = bfd_get_reloc_size (reloc_howto); |
| 773 | offset = 4 - size; |
| 774 | |
| 775 | if (size < 1 || size > 4) |
| 776 | abort(); |
| 777 | |
| 778 | fixP = fix_new_exp (frag_now, f - frag_now->fr_literal + offset, size, |
| 779 | &fixups[i].exp, |
| 780 | reloc_howto->pc_relative, |
| 781 | fixups[i].reloc); |
| 782 | } |
| 783 | else |
| 784 | { |
| 785 | fix_new_exp (frag_now, f - frag_now->fr_literal, 4, |
| 786 | &fixups[i].exp, |
| 787 | 1 /* FIXME: V850_OPERAND_RELATIVE ??? */, |
| 788 | ((bfd_reloc_code_real_type) |
| 789 | (fixups[i].opindex + (int) BFD_RELOC_UNUSED))); |
| 790 | } |
| 791 | } |
| 792 | } |
| 793 | |
| 794 | |
| 795 | /* if while processing a fixup, a reloc really needs to be created */ |
| 796 | /* then it is done here */ |
| 797 | |
| 798 | arelent * |
| 799 | tc_gen_reloc (seg, fixp) |
| 800 | asection *seg; |
| 801 | fixS *fixp; |
| 802 | { |
| 803 | arelent *reloc; |
| 804 | reloc = (arelent *) bfd_alloc_by_size_t (stdoutput, sizeof (arelent)); |
| 805 | reloc->sym_ptr_ptr = &fixp->fx_addsy->bsym; |
| 806 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; |
| 807 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); |
| 808 | if (reloc->howto == (reloc_howto_type *) NULL) |
| 809 | { |
| 810 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 811 | "reloc %d not supported by object file format", (int)fixp->fx_r_type); |
| 812 | return NULL; |
| 813 | } |
| 814 | reloc->addend = fixp->fx_addnumber; |
| 815 | /* printf("tc_gen_reloc: addr=%x addend=%x\n", reloc->address, reloc->addend); */ |
| 816 | return reloc; |
| 817 | } |
| 818 | |
| 819 | int |
| 820 | md_estimate_size_before_relax (fragp, seg) |
| 821 | fragS *fragp; |
| 822 | asection *seg; |
| 823 | { |
| 824 | return 0; |
| 825 | } |
| 826 | |
| 827 | long |
| 828 | md_pcrel_from (fixp) |
| 829 | fixS *fixp; |
| 830 | { |
| 831 | if (fixp->fx_addsy != (symbolS *) NULL && ! S_IS_DEFINED (fixp->fx_addsy)) |
| 832 | { |
| 833 | /* The symbol is undefined. Let the linker figure it out. */ |
| 834 | return 0; |
| 835 | } |
| 836 | return fixp->fx_frag->fr_address + fixp->fx_where; |
| 837 | } |
| 838 | |
| 839 | int |
| 840 | md_apply_fix3 (fixp, valuep, seg) |
| 841 | fixS *fixp; |
| 842 | valueT *valuep; |
| 843 | segT seg; |
| 844 | { |
| 845 | valueT value; |
| 846 | char *where; |
| 847 | unsigned long insn; |
| 848 | int op_type; |
| 849 | |
| 850 | if (fixp->fx_addsy == (symbolS *) NULL) |
| 851 | { |
| 852 | value = *valuep; |
| 853 | fixp->fx_done = 1; |
| 854 | } |
| 855 | else if (fixp->fx_pcrel) |
| 856 | value = *valuep; |
| 857 | else |
| 858 | { |
| 859 | value = fixp->fx_offset; |
| 860 | if (fixp->fx_subsy != (symbolS *) NULL) |
| 861 | { |
| 862 | if (S_GET_SEGMENT (fixp->fx_subsy) == absolute_section) |
| 863 | value -= S_GET_VALUE (fixp->fx_subsy); |
| 864 | else |
| 865 | { |
| 866 | /* We don't actually support subtracting a symbol. */ |
| 867 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 868 | "expression too complex"); |
| 869 | } |
| 870 | } |
| 871 | } |
| 872 | |
| 873 | /* printf("md_apply_fix: value=0x%x type=%d\n", value, fixp->fx_r_type); */ |
| 874 | |
| 875 | if ((int) fixp->fx_r_type >= (int) BFD_RELOC_UNUSED) |
| 876 | { |
| 877 | int opindex; |
| 878 | const struct v850_operand *operand; |
| 879 | char *where; |
| 880 | unsigned long insn; |
| 881 | |
| 882 | opindex = (int) fixp->fx_r_type - (int) BFD_RELOC_UNUSED; |
| 883 | operand = &v850_operands[opindex]; |
| 884 | |
| 885 | /* Fetch the instruction, insert the fully resolved operand |
| 886 | value, and stuff the instruction back again. */ |
| 887 | where = fixp->fx_frag->fr_literal + fixp->fx_where; |
| 888 | insn = bfd_getb32((unsigned char *) where); |
| 889 | insn = v850_insert_operand (insn, operand, (offsetT) value, |
| 890 | fixp->fx_file, fixp->fx_line); |
| 891 | bfd_putb32((bfd_vma) insn, (unsigned char *) where); |
| 892 | |
| 893 | if (fixp->fx_done) |
| 894 | { |
| 895 | /* Nothing else to do here. */ |
| 896 | return 1; |
| 897 | } |
| 898 | |
| 899 | /* Determine a BFD reloc value based on the operand information. |
| 900 | We are only prepared to turn a few of the operands into relocs. */ |
| 901 | |
| 902 | if (operand->bits == 22) |
| 903 | fixp->fx_r_type = BFD_RELOC_V850_22_PCREL; |
| 904 | else if (operand->bits == 9) |
| 905 | fixp->fx_r_type = BFD_RELOC_V850_9_PCREL; |
| 906 | else |
| 907 | { |
| 908 | as_bad_where(fixp->fx_file, fixp->fx_line, |
| 909 | "unresolved expression that must be resolved"); |
| 910 | fixp->fx_done = 1; |
| 911 | return 1; |
| 912 | } |
| 913 | } |
| 914 | |
| 915 | fixp->fx_addnumber = value; |
| 916 | return 1; |
| 917 | } |
| 918 | |
| 919 | \f |
| 920 | /* Insert an operand value into an instruction. */ |
| 921 | |
| 922 | static unsigned long |
| 923 | v850_insert_operand (insn, operand, val, file, line) |
| 924 | unsigned long insn; |
| 925 | const struct v850_operand *operand; |
| 926 | offsetT val; |
| 927 | char *file; |
| 928 | unsigned int line; |
| 929 | { |
| 930 | if (operand->bits != 16) |
| 931 | { |
| 932 | long min, max; |
| 933 | offsetT test; |
| 934 | |
| 935 | if ((operand->flags & V850_OPERAND_SIGNED) != 0) |
| 936 | { |
| 937 | #if 0 |
| 938 | if ((operand->flags & PPC_OPERAND_SIGNOPT) != 0 |
| 939 | && ppc_size == PPC_OPCODE_32) |
| 940 | max = (1 << operand->bits) - 1; |
| 941 | else |
| 942 | #endif |
| 943 | max = (1 << (operand->bits - 1)) - 1; |
| 944 | min = - (1 << (operand->bits - 1)); |
| 945 | } |
| 946 | else |
| 947 | { |
| 948 | max = (1 << operand->bits) - 1; |
| 949 | min = 0; |
| 950 | } |
| 951 | |
| 952 | #if 0 |
| 953 | if ((operand->flags & PPC_OPERAND_NEGATIVE) != 0) |
| 954 | test = - val; |
| 955 | else |
| 956 | #endif |
| 957 | test = val; |
| 958 | |
| 959 | |
| 960 | if (test < (offsetT) min || test > (offsetT) max) |
| 961 | { |
| 962 | const char *err = |
| 963 | "operand out of range (%s not between %ld and %ld)"; |
| 964 | char buf[100]; |
| 965 | |
| 966 | sprint_value (buf, test); |
| 967 | if (file == (char *) NULL) |
| 968 | as_warn (err, buf, min, max); |
| 969 | else |
| 970 | as_warn_where (file, line, err, buf, min, max); |
| 971 | } |
| 972 | } |
| 973 | |
| 974 | insn |= (((long) val & ((1 << operand->bits) - 1)) << operand->shift); |
| 975 | return insn; |
| 976 | } |