gas/config/tc-i386-intel.c

   1 /* tc-i386.c -- Assemble Intel syntax code for ix86/x86-64
   2    Copyright (C) 2009-2018 Free Software Foundation, Inc.
   3
   4    This file is part of GAS, the GNU Assembler.
   5
   6    GAS is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3, or (at your option)
   9    any later version.
  10
  11    GAS is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with GAS; see the file COPYING.  If not, write to the Free
  18    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  19    02110-1301, USA.  */
  20
  21 static struct
  22   {
  23     operatorT op_modifier;      /* Operand modifier.  */
  24     int is_mem;                 /* 1 if operand is memory reference.  */
  25     int is_indirect;            /* 1 if operand is indirect reference.  */
  26     int has_offset;             /* 1 if operand has offset.  */
  27     unsigned int in_offset;     /* >=1 if processing operand of offset.  */
  28     unsigned int in_bracket;    /* >=1 if processing operand in brackets.  */
  29     unsigned int in_scale;      /* >=1 if processing multiplication operand
  30                                  * in brackets.  */
  31     i386_operand_type reloc_types;      /* Value obtained from lex_got().  */
  32     const reg_entry *base;      /* Base register (if any).  */
  33     const reg_entry *index;     /* Index register (if any).  */
  34     offsetT scale_factor;       /* Accumulated scale factor.  */
  35     symbolS *seg;
  36   }
  37 intel_state;
  38
  39 /* offset X_add_symbol */
  40 #define O_offset O_md32
  41 /* offset X_add_symbol */
  42 #define O_short O_md31
  43 /* near ptr X_add_symbol */
  44 #define O_near_ptr O_md30
  45 /* far ptr X_add_symbol */
  46 #define O_far_ptr O_md29
  47 /* byte ptr X_add_symbol */
  48 #define O_byte_ptr O_md28
  49 /* word ptr X_add_symbol */
  50 #define O_word_ptr O_md27
  51 /* dword ptr X_add_symbol */
  52 #define O_dword_ptr O_md26
  53 /* qword ptr X_add_symbol */
  54 #define O_qword_ptr O_md25
  55 /* oword ptr X_add_symbol */
  56 #define O_oword_ptr O_md24
  57 /* fword ptr X_add_symbol */
  58 #define O_fword_ptr O_md23
  59 /* tbyte ptr X_add_symbol */
  60 #define O_tbyte_ptr O_md22
  61 /* xmmword ptr X_add_symbol */
  62 #define O_xmmword_ptr O_md21
  63 /* ymmword ptr X_add_symbol */
  64 #define O_ymmword_ptr O_md20
  65 /* zmmword ptr X_add_symbol */
  66 #define O_zmmword_ptr O_md19
  67
  68 static struct
  69   {
  70     const char *name;
  71     operatorT op;
  72     unsigned int operands;
  73   }
  74 const i386_operators[] =
  75   {
  76     { "and", O_bit_and, 2 },
  77     { "eq", O_eq, 2 },
  78     { "ge", O_ge, 2 },
  79     { "gt", O_gt, 2 },
  80     { "le", O_le, 2 },
  81     { "lt", O_lt, 2 },
  82     { "mod", O_modulus, 2 },
  83     { "ne", O_ne, 2 },
  84     { "not", O_bit_not, 1 },
  85     { "offset", O_offset, 1 },
  86     { "or", O_bit_inclusive_or, 2 },
  87     { "shl", O_left_shift, 2 },
  88     { "short", O_short, 1 },
  89     { "shr", O_right_shift, 2 },
  90     { "xor", O_bit_exclusive_or, 2 },
  91     { NULL, O_illegal, 0 }
  92   };
  93
  94 static struct
  95   {
  96     const char *name;
  97     operatorT op;
  98     unsigned short sz[3];
  99   }
 100 const i386_types[] =
 101   {
 102 #define I386_TYPE(t, n) { #t, O_##t##_ptr, { n, n, n } }
 103     I386_TYPE(byte, 1),
 104     I386_TYPE(word, 2),
 105     I386_TYPE(dword, 4),
 106     I386_TYPE(fword, 6),
 107     I386_TYPE(qword, 8),
 108     I386_TYPE(tbyte, 10),
 109     I386_TYPE(oword, 16),
 110     I386_TYPE(xmmword, 16),
 111     I386_TYPE(ymmword, 32),
 112     I386_TYPE(zmmword, 64),
 113 #undef I386_TYPE
 114     { "near", O_near_ptr, { 0xff04, 0xff02, 0xff08 } },
 115     { "far", O_far_ptr, { 0xff06, 0xff05, 0xff06 } },
 116     { NULL, O_illegal, { 0, 0, 0 } }
 117   };
 118
 119 operatorT i386_operator (const char *name, unsigned int operands, char *pc)
 120 {
 121   unsigned int j;
 122
 123   if (!intel_syntax)
 124     return O_absent;
 125
 126   if (!name)
 127     {
 128       if (operands != 2)
 129         return O_illegal;
 130       switch (*input_line_pointer)
 131         {
 132         case ':':
 133           ++input_line_pointer;
 134           return O_full_ptr;
 135         case '[':
 136           ++input_line_pointer;
 137           return O_index;
 138         case '@':
 139           if (this_operand >= 0 && i.reloc[this_operand] == NO_RELOC)
 140             {
 141               int adjust = 0;
 142               char *gotfree_input_line = lex_got (&i.reloc[this_operand],
 143                                                   &adjust,
 144                                                   &intel_state.reloc_types);
 145
 146               if (!gotfree_input_line)
 147                 break;
 148               free (gotfree_input_line);
 149               *input_line_pointer++ = '+';
 150               memset (input_line_pointer, '0', adjust - 1);
 151               input_line_pointer[adjust - 1] = ' ';
 152               return O_add;
 153             }
 154           break;
 155         }
 156       return O_illegal;
 157     }
 158
 159   for (j = 0; i386_operators[j].name; ++j)
 160     if (strcasecmp (i386_operators[j].name, name) == 0)
 161       {
 162         if (i386_operators[j].operands
 163             && i386_operators[j].operands != operands)
 164           return O_illegal;
 165         return i386_operators[j].op;
 166       }
 167
 168   for (j = 0; i386_types[j].name; ++j)
 169     if (strcasecmp (i386_types[j].name, name) == 0)
 170       break;
 171
 172   if (i386_types[j].name && *pc == ' ')
 173     {
 174       char *pname;
 175       char c;
 176
 177       ++input_line_pointer;
 178       c = get_symbol_name (&pname);
 179
 180       if (strcasecmp (pname, "ptr") == 0)
 181         {
 182           /* FIXME: What if c == '"' ?  */
 183           pname[-1] = *pc;
 184           *pc = c;
 185           if (intel_syntax > 0 || operands != 1)
 186             return O_illegal;
 187           return i386_types[j].op;
 188         }
 189
 190       (void) restore_line_pointer (c);
 191       input_line_pointer = pname - 1;
 192     }
 193
 194   return O_absent;
 195 }
 196
 197 static int i386_intel_parse_name (const char *name, expressionS *e)
 198 {
 199   unsigned int j;
 200
 201   if (! strcmp (name, "$"))
 202     {
 203       current_location (e);
 204       return 1;
 205     }
 206
 207   for (j = 0; i386_types[j].name; ++j)
 208     if (strcasecmp(i386_types[j].name, name) == 0)
 209       {
 210         e->X_op = O_constant;
 211         e->X_add_number = i386_types[j].sz[flag_code];
 212         e->X_add_symbol = NULL;
 213         e->X_op_symbol = NULL;
 214         return 1;
 215       }
 216
 217   return 0;
 218 }
 219
 220 static INLINE int i386_intel_check (const reg_entry *rreg,
 221                                     const reg_entry *base,
 222                                     const reg_entry *iindex)
 223 {
 224   if ((this_operand >= 0
 225        && rreg != i.op[this_operand].regs)
 226       || base != intel_state.base
 227       || iindex != intel_state.index)
 228     {
 229       as_bad (_("invalid use of register"));
 230       return 0;
 231     }
 232   return 1;
 233 }
 234
 235 static INLINE void i386_intel_fold (expressionS *e, symbolS *sym)
 236 {
 237   expressionS *exp = symbol_get_value_expression (sym);
 238   if (S_GET_SEGMENT (sym) == absolute_section)
 239     {
 240       offsetT val = e->X_add_number;
 241
 242       *e = *exp;
 243       e->X_add_number += val;
 244     }
 245   else
 246     {
 247       if (exp->X_op == O_symbol
 248           && strcmp (S_GET_NAME (exp->X_add_symbol),
 249                      GLOBAL_OFFSET_TABLE_NAME) == 0)
 250         sym = exp->X_add_symbol;
 251       e->X_add_symbol = sym;
 252       e->X_op_symbol = NULL;
 253       e->X_op = O_symbol;
 254     }
 255 }
 256
 257 static int
 258 i386_intel_simplify_register (expressionS *e)
 259 {
 260   int reg_num;
 261
 262   if (this_operand < 0 || intel_state.in_offset)
 263     {
 264       as_bad (_("invalid use of register"));
 265       return 0;
 266     }
 267
 268   if (e->X_op == O_register)
 269     reg_num = e->X_add_number;
 270   else
 271     reg_num = e->X_md - 1;
 272
 273   if (!intel_state.in_bracket)
 274     {
 275       if (i.op[this_operand].regs)
 276         {
 277           as_bad (_("invalid use of register"));
 278           return 0;
 279         }
 280       if (i386_regtab[reg_num].reg_type.bitfield.sreg3
 281           && i386_regtab[reg_num].reg_num == RegFlat)
 282         {
 283           as_bad (_("invalid use of pseudo-register"));
 284           return 0;
 285         }
 286       i.op[this_operand].regs = i386_regtab + reg_num;
 287     }
 288   else if (!intel_state.index
 289            && (i386_regtab[reg_num].reg_type.bitfield.xmmword
 290                || i386_regtab[reg_num].reg_type.bitfield.ymmword
 291                || i386_regtab[reg_num].reg_type.bitfield.zmmword
 292                || i386_regtab[reg_num].reg_num == RegIZ))
 293     intel_state.index = i386_regtab + reg_num;
 294   else if (!intel_state.base && !intel_state.in_scale)
 295     intel_state.base = i386_regtab + reg_num;
 296   else if (!intel_state.index)
 297     {
 298       if (intel_state.in_scale
 299           || current_templates->start->base_opcode == 0xf30f1b /* bndmk */
 300           || (current_templates->start->base_opcode & ~1) == 0x0f1a /* bnd{ld,st}x */
 301           || i386_regtab[reg_num].reg_type.bitfield.baseindex)
 302         intel_state.index = i386_regtab + reg_num;
 303       else
 304         {
 305           /* Convert base to index and make ESP/RSP the base.  */
 306           intel_state.index = intel_state.base;
 307           intel_state.base = i386_regtab + reg_num;
 308         }
 309     }
 310   else
 311     {
 312       /* esp is invalid as index */
 313       intel_state.index = i386_regtab + REGNAM_EAX + ESP_REG_NUM;
 314     }
 315   return 2;
 316 }
 317
 318 static int i386_intel_simplify (expressionS *);
 319
 320 static INLINE int i386_intel_simplify_symbol(symbolS *sym)
 321 {
 322   int ret = i386_intel_simplify (symbol_get_value_expression (sym));
 323
 324   if (ret == 2)
 325   {
 326     S_SET_SEGMENT(sym, absolute_section);
 327     ret = 1;
 328   }
 329   return ret;
 330 }
 331
 332 static int i386_intel_simplify (expressionS *e)
 333 {
 334   const reg_entry *the_reg = (this_operand >= 0
 335                               ? i.op[this_operand].regs : NULL);
 336   const reg_entry *base = intel_state.base;
 337   const reg_entry *state_index = intel_state.index;
 338   int ret;
 339
 340   if (!intel_syntax)
 341     return 1;
 342
 343   switch (e->X_op)
 344     {
 345     case O_index:
 346       if (e->X_add_symbol)
 347         {
 348           if (!i386_intel_simplify_symbol (e->X_add_symbol)
 349               || !i386_intel_check(the_reg, intel_state.base,
 350                                    intel_state.index))
 351             return 0;
 352         }
 353       if (!intel_state.in_offset)
 354         ++intel_state.in_bracket;
 355       ret = i386_intel_simplify_symbol (e->X_op_symbol);
 356       if (!intel_state.in_offset)
 357         --intel_state.in_bracket;
 358       if (!ret)
 359         return 0;
 360       if (e->X_add_symbol)
 361         e->X_op = O_add;
 362       else
 363         i386_intel_fold (e, e->X_op_symbol);
 364       break;
 365
 366     case O_offset:
 367       intel_state.has_offset = 1;
 368       ++intel_state.in_offset;
 369       ret = i386_intel_simplify_symbol (e->X_add_symbol);
 370       --intel_state.in_offset;
 371       if (!ret || !i386_intel_check(the_reg, base, state_index))
 372         return 0;
 373       i386_intel_fold (e, e->X_add_symbol);
 374       return ret;
 375
 376     case O_byte_ptr:
 377     case O_word_ptr:
 378     case O_dword_ptr:
 379     case O_fword_ptr:
 380     case O_qword_ptr:
 381     case O_tbyte_ptr:
 382     case O_oword_ptr:
 383     case O_xmmword_ptr:
 384     case O_ymmword_ptr:
 385     case O_zmmword_ptr:
 386     case O_near_ptr:
 387     case O_far_ptr:
 388       if (intel_state.op_modifier == O_absent)
 389         intel_state.op_modifier = e->X_op;
 390       /* FALLTHROUGH */
 391     case O_short:
 392       if (symbol_get_value_expression (e->X_add_symbol)->X_op
 393           == O_register)
 394         {
 395           as_bad (_("invalid use of register"));
 396           return 0;
 397         }
 398       if (!i386_intel_simplify_symbol (e->X_add_symbol))
 399         return 0;
 400       i386_intel_fold (e, e->X_add_symbol);
 401       break;
 402
 403     case O_full_ptr:
 404       if (symbol_get_value_expression (e->X_op_symbol)->X_op
 405           == O_register)
 406         {
 407           as_bad (_("invalid use of register"));
 408           return 0;
 409         }
 410       if (!i386_intel_simplify_symbol (e->X_op_symbol)
 411           || !i386_intel_check(the_reg, intel_state.base,
 412                                intel_state.index))
 413         return 0;
 414       if (!intel_state.in_offset)
 415         {
 416           if (!intel_state.seg)
 417             intel_state.seg = e->X_add_symbol;
 418           else
 419             {
 420               expressionS exp;
 421
 422               exp.X_op = O_full_ptr;
 423               exp.X_add_symbol = e->X_add_symbol;
 424               exp.X_op_symbol = intel_state.seg;
 425               intel_state.seg = make_expr_symbol (&exp);
 426             }
 427         }
 428       i386_intel_fold (e, e->X_op_symbol);
 429       break;
 430
 431     case O_multiply:
 432       if (this_operand >= 0 && intel_state.in_bracket)
 433         {
 434           expressionS *scale = NULL;
 435           int has_index = (intel_state.index != NULL);
 436
 437           if (!intel_state.in_scale++)
 438             intel_state.scale_factor = 1;
 439
 440           ret = i386_intel_simplify_symbol (e->X_add_symbol);
 441           if (ret && !has_index && intel_state.index)
 442             scale = symbol_get_value_expression (e->X_op_symbol);
 443
 444           if (ret)
 445             ret = i386_intel_simplify_symbol (e->X_op_symbol);
 446           if (ret && !scale && !has_index && intel_state.index)
 447             scale = symbol_get_value_expression (e->X_add_symbol);
 448
 449           if (ret && scale)
 450             {
 451               resolve_expression (scale);
 452               if (scale->X_op != O_constant
 453                   || intel_state.index->reg_type.bitfield.word)
 454                 scale->X_add_number = 0;
 455               intel_state.scale_factor *= scale->X_add_number;
 456             }
 457
 458           --intel_state.in_scale;
 459           if (!ret)
 460             return 0;
 461
 462           if (!intel_state.in_scale)
 463             switch (intel_state.scale_factor)
 464               {
 465               case 1:
 466                 i.log2_scale_factor = 0;
 467                 break;
 468               case 2:
 469                 i.log2_scale_factor = 1;
 470                 break;
 471               case 4:
 472                 i.log2_scale_factor = 2;
 473                 break;
 474               case 8:
 475                 i.log2_scale_factor = 3;
 476                 break;
 477               default:
 478                 /* esp is invalid as index */
 479                 intel_state.index = i386_regtab + REGNAM_EAX + ESP_REG_NUM;
 480                 break;
 481               }
 482
 483           break;
 484         }
 485       goto fallthrough;
 486
 487     case O_register:
 488       ret = i386_intel_simplify_register (e);
 489       if (ret == 2)
 490         {
 491           gas_assert (e->X_add_number < (unsigned short) -1);
 492           e->X_md = (unsigned short) e->X_add_number + 1;
 493           e->X_op = O_constant;
 494           e->X_add_number = 0;
 495         }
 496       return ret;
 497
 498     case O_constant:
 499       if (e->X_md)
 500         return i386_intel_simplify_register (e);
 501
 502       /* FALLTHROUGH */
 503     default:
 504 fallthrough:
 505       if (e->X_add_symbol
 506           && !i386_intel_simplify_symbol (e->X_add_symbol))
 507         return 0;
 508       if (e->X_op == O_add || e->X_op == O_subtract)
 509         {
 510           base = intel_state.base;
 511           state_index = intel_state.index;
 512         }
 513       if (!i386_intel_check (the_reg, base, state_index)
 514           || (e->X_op_symbol
 515               && !i386_intel_simplify_symbol (e->X_op_symbol))
 516           || !i386_intel_check (the_reg,
 517                                 (e->X_op != O_add
 518                                  ? base : intel_state.base),
 519                                 (e->X_op != O_add
 520                                  ? state_index : intel_state.index)))
 521         return 0;
 522       break;
 523     }
 524
 525   if (this_operand >= 0
 526       && e->X_op == O_symbol
 527       && !intel_state.in_offset)
 528     {
 529       segT seg = S_GET_SEGMENT (e->X_add_symbol);
 530
 531       if (seg != absolute_section
 532           && seg != reg_section
 533           && seg != expr_section)
 534         intel_state.is_mem |= 2 - !intel_state.in_bracket;
 535     }
 536
 537   return 1;
 538 }
 539
 540 int i386_need_index_operator (void)
 541 {
 542   return intel_syntax < 0;
 543 }
 544
 545 static int
 546 i386_intel_operand (char *operand_string, int got_a_float)
 547 {
 548   char *saved_input_line_pointer, *buf;
 549   segT exp_seg;
 550   expressionS exp, *expP;
 551   char suffix = 0;
 552   int ret;
 553
 554   /* Handle vector immediates.  */
 555   if (RC_SAE_immediate (operand_string))
 556     return 1;
 557
 558   /* Initialize state structure.  */
 559   intel_state.op_modifier = O_absent;
 560   intel_state.is_mem = 0;
 561   intel_state.is_indirect = 0;
 562   intel_state.has_offset = 0;
 563   intel_state.base = NULL;
 564   intel_state.index = NULL;
 565   intel_state.seg = NULL;
 566   operand_type_set (&intel_state.reloc_types, ~0);
 567   gas_assert (!intel_state.in_offset);
 568   gas_assert (!intel_state.in_bracket);
 569   gas_assert (!intel_state.in_scale);
 570
 571   saved_input_line_pointer = input_line_pointer;
 572   input_line_pointer = buf = xstrdup (operand_string);
 573
 574   intel_syntax = -1;
 575   memset (&exp, 0, sizeof(exp));
 576   exp_seg = expression (&exp);
 577   ret = i386_intel_simplify (&exp);
 578   intel_syntax = 1;
 579
 580   SKIP_WHITESPACE ();
 581
 582   /* Handle vector operations.  */
 583   if (*input_line_pointer == '{')
 584     {
 585       char *end = check_VecOperations (input_line_pointer, NULL);
 586       if (end)
 587         input_line_pointer = end;
 588       else
 589         ret = 0;
 590     }
 591
 592   if (!is_end_of_line[(unsigned char) *input_line_pointer])
 593     {
 594       if (ret)
 595         as_bad (_("junk `%s' after expression"), input_line_pointer);
 596       ret = 0;
 597     }
 598   else if (exp.X_op == O_illegal || exp.X_op == O_absent)
 599     {
 600       if (ret)
 601         as_bad (_("invalid expression"));
 602       ret = 0;
 603     }
 604   else if (!intel_state.has_offset
 605            && input_line_pointer > buf
 606            && *(input_line_pointer - 1) == ']')
 607     {
 608       intel_state.is_mem |= 1;
 609       intel_state.is_indirect = 1;
 610     }
 611
 612   input_line_pointer = saved_input_line_pointer;
 613   free (buf);
 614
 615   gas_assert (!intel_state.in_offset);
 616   gas_assert (!intel_state.in_bracket);
 617   gas_assert (!intel_state.in_scale);
 618
 619   if (!ret)
 620     return 0;
 621
 622   if (intel_state.op_modifier != O_absent
 623       && current_templates->start->base_opcode != 0x8d /* lea */)
 624     {
 625       i.types[this_operand].bitfield.unspecified = 0;
 626
 627       switch (intel_state.op_modifier)
 628         {
 629         case O_byte_ptr:
 630           i.types[this_operand].bitfield.byte = 1;
 631           suffix = BYTE_MNEM_SUFFIX;
 632           break;
 633
 634         case O_word_ptr:
 635           i.types[this_operand].bitfield.word = 1;
 636           if ((current_templates->start->name[0] == 'l'
 637                && current_templates->start->name[2] == 's'
 638                && current_templates->start->name[3] == 0)
 639               || current_templates->start->base_opcode == 0x62 /* bound */)
 640             suffix = BYTE_MNEM_SUFFIX; /* so it will cause an error */
 641           else if (got_a_float == 2)    /* "fi..." */
 642             suffix = SHORT_MNEM_SUFFIX;
 643           else
 644             suffix = WORD_MNEM_SUFFIX;
 645           break;
 646
 647         case O_dword_ptr:
 648           i.types[this_operand].bitfield.dword = 1;
 649           if ((current_templates->start->name[0] == 'l'
 650                && current_templates->start->name[2] == 's'
 651                && current_templates->start->name[3] == 0)
 652               || current_templates->start->base_opcode == 0x62 /* bound */)
 653             suffix = WORD_MNEM_SUFFIX;
 654           else if (flag_code == CODE_16BIT
 655                    && (current_templates->start->opcode_modifier.jump
 656                        || current_templates->start->opcode_modifier.jumpdword))
 657             suffix = LONG_DOUBLE_MNEM_SUFFIX;
 658           else if (got_a_float == 1)    /* "f..." */
 659             suffix = SHORT_MNEM_SUFFIX;
 660           else
 661             suffix = LONG_MNEM_SUFFIX;
 662           break;
 663
 664         case O_fword_ptr:
 665           i.types[this_operand].bitfield.fword = 1;
 666           if (current_templates->start->name[0] == 'l'
 667               && current_templates->start->name[2] == 's'
 668               && current_templates->start->name[3] == 0)
 669             suffix = LONG_MNEM_SUFFIX;
 670           else if (!got_a_float)
 671             {
 672               if (flag_code == CODE_16BIT)
 673                 add_prefix (DATA_PREFIX_OPCODE);
 674               suffix = LONG_DOUBLE_MNEM_SUFFIX;
 675             }
 676           else
 677             suffix = BYTE_MNEM_SUFFIX; /* so it will cause an error */
 678           break;
 679
 680         case O_qword_ptr:
 681           i.types[this_operand].bitfield.qword = 1;
 682           if (current_templates->start->base_opcode == 0x62 /* bound */
 683               || got_a_float == 1)      /* "f..." */
 684             suffix = LONG_MNEM_SUFFIX;
 685           else
 686             suffix = QWORD_MNEM_SUFFIX;
 687           break;
 688
 689         case O_tbyte_ptr:
 690           i.types[this_operand].bitfield.tbyte = 1;
 691           if (got_a_float == 1)
 692             suffix = LONG_DOUBLE_MNEM_SUFFIX;
 693           else
 694             suffix = BYTE_MNEM_SUFFIX; /* so it will cause an error */
 695           break;
 696
 697         case O_oword_ptr:
 698         case O_xmmword_ptr:
 699           i.types[this_operand].bitfield.xmmword = 1;
 700           break;
 701
 702         case O_ymmword_ptr:
 703           i.types[this_operand].bitfield.ymmword = 1;
 704           break;
 705
 706         case O_zmmword_ptr:
 707           i.types[this_operand].bitfield.zmmword = 1;
 708           break;
 709
 710         case O_far_ptr:
 711           suffix = LONG_DOUBLE_MNEM_SUFFIX;
 712           /* FALLTHROUGH */
 713         case O_near_ptr:
 714           if (!current_templates->start->opcode_modifier.jump
 715               && !current_templates->start->opcode_modifier.jumpdword)
 716             suffix = got_a_float /* so it will cause an error */
 717                      ? BYTE_MNEM_SUFFIX
 718                      : LONG_DOUBLE_MNEM_SUFFIX;
 719           break;
 720
 721         default:
 722           BAD_CASE (intel_state.op_modifier);
 723           break;
 724         }
 725
 726       if (!i.suffix)
 727         i.suffix = suffix;
 728       else if (i.suffix != suffix)
 729         {
 730           as_bad (_("conflicting operand size modifiers"));
 731           return 0;
 732         }
 733     }
 734
 735   /* Operands for jump/call need special consideration.  */
 736   if (current_templates->start->opcode_modifier.jump
 737       || current_templates->start->opcode_modifier.jumpdword
 738       || current_templates->start->opcode_modifier.jumpintersegment)
 739     {
 740       if (i.op[this_operand].regs
 741           || intel_state.base
 742           || intel_state.index
 743           || intel_state.is_mem > 1)
 744         i.types[this_operand].bitfield.jumpabsolute = 1;
 745       else
 746         switch (intel_state.op_modifier)
 747           {
 748           case O_near_ptr:
 749             if (intel_state.seg)
 750               i.types[this_operand].bitfield.jumpabsolute = 1;
 751             else
 752               intel_state.is_mem = 1;
 753             break;
 754           case O_far_ptr:
 755           case O_absent:
 756             if (!intel_state.seg)
 757               {
 758                 intel_state.is_mem = 1;
 759                 if (intel_state.op_modifier == O_absent)
 760                   {
 761                     if (intel_state.is_indirect == 1)
 762                       i.types[this_operand].bitfield.jumpabsolute = 1;
 763                     break;
 764                   }
 765                 as_bad (_("cannot infer the segment part of the operand"));
 766                 return 0;
 767               }
 768             else if (S_GET_SEGMENT (intel_state.seg) == reg_section)
 769               i.types[this_operand].bitfield.jumpabsolute = 1;
 770             else
 771               {
 772                 i386_operand_type types;
 773
 774                 if (i.imm_operands >= MAX_IMMEDIATE_OPERANDS)
 775                   {
 776                     as_bad (_("at most %d immediate operands are allowed"),
 777                             MAX_IMMEDIATE_OPERANDS);
 778                     return 0;
 779                   }
 780                 expP = &im_expressions[i.imm_operands++];
 781                 memset (expP, 0, sizeof(*expP));
 782                 expP->X_op = O_symbol;
 783                 expP->X_add_symbol = intel_state.seg;
 784                 i.op[this_operand].imms = expP;
 785
 786                 resolve_expression (expP);
 787                 operand_type_set (&types, ~0);
 788                 if (!i386_finalize_immediate (S_GET_SEGMENT (intel_state.seg),
 789                                               expP, types, operand_string))
 790                   return 0;
 791                 if (i.operands < MAX_OPERANDS)
 792                   {
 793                     this_operand = i.operands++;
 794                     i.types[this_operand].bitfield.unspecified = 1;
 795                   }
 796                 if (suffix == LONG_DOUBLE_MNEM_SUFFIX)
 797                   i.suffix = 0;
 798                 intel_state.seg = NULL;
 799                 intel_state.is_mem = 0;
 800               }
 801             break;
 802           default:
 803             i.types[this_operand].bitfield.jumpabsolute = 1;
 804             break;
 805           }
 806       if (i.types[this_operand].bitfield.jumpabsolute)
 807         intel_state.is_mem |= 1;
 808     }
 809   else if (intel_state.seg)
 810     intel_state.is_mem |= 1;
 811
 812   if (i.op[this_operand].regs)
 813     {
 814       i386_operand_type temp;
 815
 816       /* Register operand.  */
 817       if (intel_state.base || intel_state.index || intel_state.seg)
 818         {
 819           as_bad (_("invalid operand"));
 820           return 0;
 821         }
 822
 823       temp = i.op[this_operand].regs->reg_type;
 824       temp.bitfield.baseindex = 0;
 825       i.types[this_operand] = operand_type_or (i.types[this_operand],
 826                                                temp);
 827       i.types[this_operand].bitfield.unspecified = 0;
 828       ++i.reg_operands;
 829     }
 830   else if (intel_state.base
 831            || intel_state.index
 832            || intel_state.seg
 833            || intel_state.is_mem)
 834     {
 835       /* Memory operand.  */
 836       if (i.mem_operands == 1 && !maybe_adjust_templates ())
 837         return 0;
 838       if ((int) i.mem_operands
 839           >= 2 - !current_templates->start->opcode_modifier.isstring)
 840         {
 841           /* Handle
 842
 843              call       0x9090,0x90909090
 844              lcall      0x9090,0x90909090
 845              jmp        0x9090,0x90909090
 846              ljmp       0x9090,0x90909090
 847            */
 848
 849           if ((current_templates->start->opcode_modifier.jumpintersegment
 850                || current_templates->start->opcode_modifier.jumpdword
 851                || current_templates->start->opcode_modifier.jump)
 852               && this_operand == 1
 853               && intel_state.seg == NULL
 854               && i.mem_operands == 1
 855               && i.disp_operands == 1
 856               && intel_state.op_modifier == O_absent)
 857             {
 858               /* Try to process the first operand as immediate,  */
 859               this_operand = 0;
 860               if (i386_finalize_immediate (exp_seg, i.op[0].imms,
 861                                            intel_state.reloc_types,
 862                                            NULL))
 863                 {
 864                   this_operand = 1;
 865                   expP = &im_expressions[0];
 866                   i.op[this_operand].imms = expP;
 867                   *expP = exp;
 868
 869                   /* Try to process the second operand as immediate,  */
 870                   if (i386_finalize_immediate (exp_seg, expP,
 871                                                intel_state.reloc_types,
 872                                                NULL))
 873                     {
 874                       i.mem_operands = 0;
 875                       i.disp_operands = 0;
 876                       i.imm_operands = 2;
 877                       i.flags[0] &= ~Operand_Mem;
 878                       i.types[0].bitfield.disp16 = 0;
 879                       i.types[0].bitfield.disp32 = 0;
 880                       i.types[0].bitfield.disp32s = 0;
 881                       return 1;
 882                     }
 883                 }
 884             }
 885
 886           as_bad (_("too many memory references for `%s'"),
 887                   current_templates->start->name);
 888           return 0;
 889         }
 890
 891       /* Swap base and index in 16-bit memory operands like
 892          [si+bx]. Since i386_index_check is also used in AT&T
 893          mode we have to do this here.  */
 894       if (intel_state.base
 895           && intel_state.index
 896           && intel_state.base->reg_type.bitfield.word
 897           && intel_state.index->reg_type.bitfield.word
 898           && intel_state.base->reg_num >= 6
 899           && intel_state.index->reg_num < 6)
 900         {
 901           i.base_reg = intel_state.index;
 902           i.index_reg = intel_state.base;
 903         }
 904       else
 905         {
 906           i.base_reg = intel_state.base;
 907           i.index_reg = intel_state.index;
 908         }
 909
 910       if (i.base_reg || i.index_reg)
 911         i.types[this_operand].bitfield.baseindex = 1;
 912
 913       expP = &disp_expressions[i.disp_operands];
 914       memcpy (expP, &exp, sizeof(exp));
 915       resolve_expression (expP);
 916
 917       if (expP->X_op != O_constant
 918           || expP->X_add_number
 919           || !i.types[this_operand].bitfield.baseindex)
 920         {
 921           i.op[this_operand].disps = expP;
 922           i.disp_operands++;
 923
 924           i386_addressing_mode ();
 925
 926           if (flag_code == CODE_64BIT)
 927             {
 928               i.types[this_operand].bitfield.disp32 = 1;
 929               if (!i.prefix[ADDR_PREFIX])
 930                 {
 931                   i.types[this_operand].bitfield.disp64 = 1;
 932                   i.types[this_operand].bitfield.disp32s = 1;
 933                 }
 934             }
 935           else if (!i.prefix[ADDR_PREFIX] ^ (flag_code == CODE_16BIT))
 936             i.types[this_operand].bitfield.disp32 = 1;
 937           else
 938             i.types[this_operand].bitfield.disp16 = 1;
 939
 940 #if defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT)
 941           /*
 942            * exp_seg is used only for verification in
 943            * i386_finalize_displacement, and we can end up seeing reg_section
 944            * here - but we know we removed all registers from the expression
 945            * (or error-ed on any remaining ones) in i386_intel_simplify.  I
 946            * consider the check in i386_finalize_displacement bogus anyway, in
 947            * particular because it doesn't allow for expr_section, so I'd
 948            * rather see that check (and the similar one in
 949            * i386_finalize_immediate) use SEG_NORMAL(), but not being an a.out
 950            * expert I can't really say whether that would have other bad side
 951            * effects.
 952            */
 953           if (OUTPUT_FLAVOR == bfd_target_aout_flavour
 954               && exp_seg == reg_section)
 955             exp_seg = expP->X_op != O_constant ? undefined_section
 956                                                : absolute_section;
 957 #endif
 958
 959           if (!i386_finalize_displacement (exp_seg, expP,
 960                                            intel_state.reloc_types,
 961                                            operand_string))
 962             return 0;
 963         }
 964
 965       if (intel_state.seg)
 966         {
 967           for (ret = check_none; ; ret = operand_check)
 968             {
 969               expP = symbol_get_value_expression (intel_state.seg);
 970               if (expP->X_op != O_full_ptr
 971                   || symbol_get_value_expression (expP->X_op_symbol)->X_op
 972                      != O_register)
 973                 break;
 974               intel_state.seg = expP->X_add_symbol;
 975             }
 976           if (expP->X_op != O_register)
 977             {
 978               as_bad (_("segment register name expected"));
 979               return 0;
 980             }
 981           if (!i386_regtab[expP->X_add_number].reg_type.bitfield.sreg2
 982               && !i386_regtab[expP->X_add_number].reg_type.bitfield.sreg3)
 983             {
 984               as_bad (_("invalid use of register"));
 985               return 0;
 986             }
 987           switch (ret)
 988             {
 989             case check_error:
 990               as_bad (_("redundant segment overrides"));
 991               return 0;
 992             case check_warning:
 993               as_warn (_("redundant segment overrides"));
 994               break;
 995             }
 996           switch (i386_regtab[expP->X_add_number].reg_num)
 997             {
 998             case 0: i.seg[i.mem_operands] = &es; break;
 999             case 1: i.seg[i.mem_operands] = &cs; break;
1000             case 2: i.seg[i.mem_operands] = &ss; break;
1001             case 3: i.seg[i.mem_operands] = &ds; break;
1002             case 4: i.seg[i.mem_operands] = &fs; break;
1003             case 5: i.seg[i.mem_operands] = &gs; break;
1004             case RegFlat: i.seg[i.mem_operands] = NULL; break;
1005             }
1006         }
1007
1008       if (!i386_index_check (operand_string))
1009         return 0;
1010
1011       i.flags[this_operand] |= Operand_Mem;
1012       if (i.mem_operands == 0)
1013         i.memop1_string = xstrdup (operand_string);
1014       ++i.mem_operands;
1015     }
1016   else
1017     {
1018       /* Immediate.  */
1019       if (i.imm_operands >= MAX_IMMEDIATE_OPERANDS)
1020         {
1021           as_bad (_("at most %d immediate operands are allowed"),
1022                   MAX_IMMEDIATE_OPERANDS);
1023           return 0;
1024         }
1025
1026       expP = &im_expressions[i.imm_operands++];
1027       i.op[this_operand].imms = expP;
1028       *expP = exp;
1029
1030       return i386_finalize_immediate (exp_seg, expP, intel_state.reloc_types,
1031                                       operand_string);
1032     }
1033
1034   return 1;
1035 }