gas/config/tc-pdp11.c

   1 /* tc-pdp11.c - pdp11-specific -
   2    Copyright (C) 2001-2016 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
  18    the Free Software Foundation, 51 Franklin Street - Fifth Floor,
  19    Boston, MA 02110-1301, USA.  */
  20
  21 #include "as.h"
  22 #include "safe-ctype.h"
  23 #include "opcode/pdp11.h"
  24
  25 extern int flonum_gen2vax (int, FLONUM_TYPE * f, LITTLENUM_TYPE *);
  26
  27 #define TRUE  1
  28 #define FALSE 0
  29
  30 /* A representation for PDP-11 machine code.  */
  31 struct pdp11_code
  32 {
  33   char *error;
  34   int code;
  35   int additional;       /* Is there an additional word?  */
  36   int word;             /* Additional word, if any.  */
  37   struct
  38   {
  39     bfd_reloc_code_real_type type;
  40     expressionS exp;
  41     int pc_rel;
  42   } reloc;
  43 };
  44
  45 /* Instruction set extensions.
  46
  47    If you change this from an array to something else, please update
  48    the "PDP-11 instruction set extensions" comment in pdp11.h.  */
  49 int pdp11_extension[PDP11_EXT_NUM];
  50
  51 /* Assembly options.  */
  52
  53 #define ASM_OPT_PIC 1
  54 #define ASM_OPT_NUM 2
  55
  56 int asm_option[ASM_OPT_NUM];
  57
  58 /* These chars start a comment anywhere in a source file (except inside
  59    another comment.  */
  60 const char comment_chars[] = "#/";
  61
  62 /* These chars only start a comment at the beginning of a line.  */
  63 const char line_comment_chars[] = "#/";
  64
  65 const char line_separator_chars[] = ";";
  66
  67 /* Chars that can be used to separate mant from exp in floating point nums.  */
  68 const char EXP_CHARS[] = "eE";
  69
  70 /* Chars that mean this number is a floating point constant.  */
  71 /* as in 0f123.456.  */
  72 /* or    0H1.234E-12 (see exp chars above).  */
  73 const char FLT_CHARS[] = "dDfF";
  74
  75 void pseudo_even (int);
  76 void pseudo_bss (int);
  77
  78 const pseudo_typeS md_pseudo_table[] =
  79 {
  80   { "bss", pseudo_bss, 0 },
  81   { "even", pseudo_even, 0 },
  82   { 0, 0, 0 },
  83 };
  84
  85 static struct hash_control *insn_hash = NULL;
  86 \f
  87 static int
  88 set_option (const char *arg)
  89 {
  90   int yes = 1;
  91
  92   if (strcmp (arg, "all-extensions") == 0
  93       || strcmp (arg, "all") == 0)
  94     {
  95       memset (pdp11_extension, ~0, sizeof pdp11_extension);
  96       pdp11_extension[PDP11_NONE] = 0;
  97       return 1;
  98     }
  99   else if (strcmp (arg, "no-extensions") == 0)
 100     {
 101       memset (pdp11_extension, 0, sizeof pdp11_extension);
 102       pdp11_extension[PDP11_BASIC] = 1;
 103       return 1;
 104     }
 105
 106   if (strncmp (arg, "no-", 3) == 0)
 107     {
 108       yes = 0;
 109       arg += 3;
 110     }
 111
 112   /* Commersial instructions.  */
 113   if (strcmp (arg, "cis") == 0)
 114     pdp11_extension[PDP11_CIS] = yes;
 115   /* Call supervisor mode.  */
 116   else if (strcmp (arg, "csm") == 0)
 117     pdp11_extension[PDP11_CSM] = yes;
 118   /* Extended instruction set.  */
 119   else if (strcmp (arg, "eis") == 0)
 120     pdp11_extension[PDP11_EIS] = pdp11_extension[PDP11_LEIS] = yes;
 121   /* KEV11 floating-point.  */
 122   else if (strcmp (arg, "fis") == 0
 123            || strcmp (arg, "kev11") == 0
 124            || strcmp (arg, "kev-11") == 0)
 125     pdp11_extension[PDP11_FIS] = yes;
 126   /* FP-11 floating-point.  */
 127   else if (strcmp (arg, "fpp") == 0
 128            || strcmp (arg, "fpu") == 0
 129            || strcmp (arg, "fp11") == 0
 130            || strcmp (arg, "fp-11") == 0
 131            || strcmp (arg, "fpj11") == 0
 132            || strcmp (arg, "fp-j11") == 0
 133            || strcmp (arg, "fpj-11") == 0)
 134     pdp11_extension[PDP11_FPP] = yes;
 135   /* Limited extended insns.  */
 136   else if (strcmp (arg, "limited-eis") == 0)
 137     {
 138       pdp11_extension[PDP11_LEIS] = yes;
 139       if (!pdp11_extension[PDP11_LEIS])
 140         pdp11_extension[PDP11_EIS] = 0;
 141     }
 142   /* Move from processor type.  */
 143   else if (strcmp (arg, "mfpt") == 0)
 144     pdp11_extension[PDP11_MFPT] = yes;
 145   /* Multiprocessor insns:  */
 146   else if (strncmp (arg, "mproc", 5) == 0
 147            /* TSTSET, WRTLCK */
 148            || strncmp (arg, "multiproc", 9) == 0)
 149     pdp11_extension[PDP11_MPROC] = yes;
 150   /* Move from/to proc status.  */
 151   else if (strcmp (arg, "mxps") == 0)
 152     pdp11_extension[PDP11_MXPS] = yes;
 153   /* Position-independent code.  */
 154   else if (strcmp (arg, "pic") == 0)
 155     asm_option[ASM_OPT_PIC] = yes;
 156   /* Set priority level.  */
 157   else if (strcmp (arg, "spl") == 0)
 158     pdp11_extension[PDP11_SPL] = yes;
 159   /* Microcode instructions:  */
 160   else if (strcmp (arg, "ucode") == 0
 161            /* LDUB, MED, XFC */
 162            || strcmp (arg, "microcode") == 0)
 163     pdp11_extension[PDP11_UCODE] = yes;
 164   else
 165     return 0;
 166
 167   return 1;
 168 }
 169
 170
 171 static void
 172 init_defaults (void)
 173 {
 174   static int first = 1;
 175
 176   if (first)
 177     {
 178       set_option ("all-extensions");
 179       set_option ("pic");
 180       first = 0;
 181     }
 182 }
 183
 184 void
 185 md_begin (void)
 186 {
 187   int i;
 188
 189   init_defaults ();
 190
 191   insn_hash = hash_new ();
 192   if (insn_hash == NULL)
 193     as_fatal (_("Virtual memory exhausted"));
 194
 195   for (i = 0; i < pdp11_num_opcodes; i++)
 196     hash_insert (insn_hash, pdp11_opcodes[i].name, (void *) (pdp11_opcodes + i));
 197   for (i = 0; i < pdp11_num_aliases; i++)
 198     hash_insert (insn_hash, pdp11_aliases[i].name, (void *) (pdp11_aliases + i));
 199 }
 200
 201 void
 202 md_number_to_chars (char con[], valueT value, int nbytes)
 203 {
 204   /* On a PDP-11, 0x1234 is stored as "\x12\x34", and
 205      0x12345678 is stored as "\x56\x78\x12\x34". It's
 206      anyones guess what 0x123456 would be stored like.  */
 207
 208   switch (nbytes)
 209     {
 210     case 0:
 211       break;
 212     case 1:
 213       con[0] =  value       & 0xff;
 214       break;
 215     case 2:
 216       con[0] =  value        & 0xff;
 217       con[1] = (value >>  8) & 0xff;
 218       break;
 219     case 4:
 220       con[0] = (value >> 16) & 0xff;
 221       con[1] = (value >> 24) & 0xff;
 222       con[2] =  value        & 0xff;
 223       con[3] = (value >>  8) & 0xff;
 224       break;
 225     default:
 226       BAD_CASE (nbytes);
 227     }
 228 }
 229
 230 /* Fix up some data or instructions after we find out the value of a symbol
 231    that they reference.  Knows about order of bytes in address.  */
 232
 233 void
 234 md_apply_fix (fixS *fixP,
 235                valueT * valP,
 236                segT seg ATTRIBUTE_UNUSED)
 237 {
 238   valueT code;
 239   valueT mask;
 240   valueT val = * valP;
 241   char *buf;
 242   int shift;
 243   int size;
 244
 245   buf = fixP->fx_where + fixP->fx_frag->fr_literal;
 246   size = fixP->fx_size;
 247   code = md_chars_to_number ((unsigned char *) buf, size);
 248
 249   switch (fixP->fx_r_type)
 250     {
 251     case BFD_RELOC_16:
 252     case BFD_RELOC_16_PCREL:
 253       mask = 0xffff;
 254       shift = 0;
 255       break;
 256     case BFD_RELOC_PDP11_DISP_8_PCREL:
 257       mask = 0x00ff;
 258       shift = 1;
 259       break;
 260     case BFD_RELOC_PDP11_DISP_6_PCREL:
 261       mask = 0x003f;
 262       shift = 1;
 263       val = -val;
 264       break;
 265     default:
 266       BAD_CASE (fixP->fx_r_type);
 267     }
 268
 269   if (fixP->fx_addsy != NULL)
 270     val += symbol_get_bfdsym (fixP->fx_addsy)->section->vma;
 271     /* *value += fixP->fx_addsy->bsym->section->vma; */
 272
 273   code &= ~mask;
 274   code |= (val >> shift) & mask;
 275   number_to_chars_littleendian (buf, code, size);
 276
 277   if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0)
 278     fixP->fx_done = 1;
 279 }
 280
 281 long
 282 md_chars_to_number (unsigned char *con, int nbytes)
 283 {
 284   /* On a PDP-11, 0x1234 is stored as "\x12\x34", and
 285      0x12345678 is stored as "\x56\x78\x12\x34". It's
 286      anyones guess what 0x123456 would be stored like.  */
 287   switch (nbytes)
 288     {
 289     case 0:
 290       return 0;
 291     case 1:
 292       return con[0];
 293     case 2:
 294       return (con[1] << BITS_PER_CHAR) | con[0];
 295     case 4:
 296       return
 297         (((con[1] << BITS_PER_CHAR) | con[0]) << (2 * BITS_PER_CHAR))
 298         |((con[3] << BITS_PER_CHAR) | con[2]);
 299     default:
 300       BAD_CASE (nbytes);
 301       return 0;
 302     }
 303 }
 304 \f
 305 static char *
 306 skip_whitespace (char *str)
 307 {
 308   while (*str == ' ' || *str == '\t')
 309     str++;
 310   return str;
 311 }
 312
 313 static char *
 314 find_whitespace (char *str)
 315 {
 316   while (*str != ' ' && *str != '\t' && *str != 0)
 317     str++;
 318   return str;
 319 }
 320
 321 static char *
 322 parse_reg (char *str, struct pdp11_code *operand)
 323 {
 324   str = skip_whitespace (str);
 325   if (TOLOWER (*str) == 'r')
 326     {
 327       str++;
 328       switch (*str)
 329         {
 330         case '0': case '1': case '2': case '3':
 331         case '4': case '5': case '6': case '7':
 332           operand->code = *str - '0';
 333           str++;
 334           break;
 335         default:
 336           operand->error = _("Bad register name");
 337           return str - 1;
 338         }
 339     }
 340   else if (strncmp (str, "sp", 2) == 0
 341            || strncmp (str, "SP", 2) == 0)
 342     {
 343       operand->code = 6;
 344       str += 2;
 345     }
 346   else if (strncmp (str, "pc", 2) == 0
 347            || strncmp (str, "PC", 2) == 0)
 348     {
 349       operand->code = 7;
 350       str += 2;
 351     }
 352   else
 353     {
 354       operand->error = _("Bad register name");
 355       return str;
 356     }
 357
 358   return str;
 359 }
 360
 361 static char *
 362 parse_ac5 (char *str, struct pdp11_code *operand)
 363 {
 364   str = skip_whitespace (str);
 365   if (strncmp (str, "fr", 2) == 0
 366       || strncmp (str, "FR", 2) == 0
 367       || strncmp (str, "ac", 2) == 0
 368       || strncmp (str, "AC", 2) == 0)
 369     {
 370       str += 2;
 371       switch (*str)
 372         {
 373         case '0': case '1': case '2': case '3':
 374         case '4': case '5':
 375           operand->code = *str - '0';
 376           str++;
 377           break;
 378         default:
 379           operand->error = _("Bad register name");
 380           return str - 2;
 381         }
 382     }
 383   else
 384     {
 385       operand->error = _("Bad register name");
 386       return str;
 387     }
 388
 389   return str;
 390 }
 391
 392 static char *
 393 parse_ac (char *str, struct pdp11_code *operand)
 394 {
 395   str = parse_ac5 (str, operand);
 396   if (!operand->error && operand->code > 3)
 397     {
 398       operand->error = _("Bad register name");
 399           return str - 3;
 400     }
 401
 402   return str;
 403 }
 404
 405 static char *
 406 parse_expression (char *str, struct pdp11_code *operand)
 407 {
 408   char *save_input_line_pointer;
 409   segT seg;
 410
 411   save_input_line_pointer = input_line_pointer;
 412   input_line_pointer = str;
 413   seg = expression (&operand->reloc.exp);
 414   if (seg == NULL)
 415     {
 416       input_line_pointer = save_input_line_pointer;
 417       operand->error = _("Error in expression");
 418       return str;
 419     }
 420
 421   str = input_line_pointer;
 422   input_line_pointer = save_input_line_pointer;
 423
 424   operand->reloc.pc_rel = 0;
 425
 426   return str;
 427 }
 428
 429 static char *
 430 parse_op_no_deferred (char *str, struct pdp11_code *operand)
 431 {
 432   LITTLENUM_TYPE literal_float[2];
 433
 434   str = skip_whitespace (str);
 435
 436   switch (*str)
 437     {
 438     case '(':                           /* (rn) and (rn)+ */
 439       str = parse_reg (str + 1, operand);
 440       if (operand->error)
 441         return str;
 442       str = skip_whitespace (str);
 443       if (*str != ')')
 444         {
 445           operand->error = _("Missing ')'");
 446           return str;
 447         }
 448       str++;
 449       if (*str == '+')
 450         {
 451           operand->code |= 020;
 452           str++;
 453         }
 454       else
 455         {
 456           operand->code |= 010;
 457         }
 458       break;
 459
 460       /* Immediate.  */
 461     case '#':
 462     case '$':
 463       str = parse_expression (str + 1, operand);
 464       if (operand->error)
 465         return str;
 466       operand->additional = TRUE;
 467       operand->word = operand->reloc.exp.X_add_number;
 468       switch (operand->reloc.exp.X_op)
 469         {
 470         case O_constant:
 471           break;
 472         case O_symbol:
 473         case O_add:
 474         case O_subtract:
 475           operand->reloc.type = BFD_RELOC_16;
 476           operand->reloc.pc_rel = 0;
 477           break;
 478         case O_big:
 479           if (operand->reloc.exp.X_add_number > 0)
 480             {
 481               operand->error = _("Error in expression");
 482               break;
 483             }
 484           /* It's a floating literal...  */
 485           know (operand->reloc.exp.X_add_number < 0);
 486           flonum_gen2vax ('f', &generic_floating_point_number, literal_float);
 487           operand->word = literal_float[0];
 488           if (literal_float[1] != 0)
 489             as_warn (_("Low order bits truncated in immediate float operand"));
 490           break;
 491         default:
 492           operand->error = _("Error in expression");
 493           break;
 494         }
 495       operand->code = 027;
 496       break;
 497
 498       /* label, d(rn), -(rn)  */
 499     default:
 500       {
 501         if (strncmp (str, "-(", 2) == 0)        /* -(rn) */
 502           {
 503             str = parse_reg (str + 2, operand);
 504             if (operand->error)
 505               return str;
 506             str = skip_whitespace (str);
 507             if (*str != ')')
 508               {
 509                 operand->error = _("Missing ')'");
 510                 return str;
 511               }
 512             operand->code |= 040;
 513             str++;
 514             break;
 515           }
 516
 517         str = parse_expression (str, operand);
 518         if (operand->error)
 519           return str;
 520
 521         str = skip_whitespace (str);
 522
 523         if (*str != '(')
 524           {
 525             operand->code = 067;
 526             operand->additional = 1;
 527             operand->word = 0;
 528             operand->reloc.type = BFD_RELOC_16_PCREL;
 529             operand->reloc.pc_rel = 1;
 530             break;
 531           }
 532
 533         /* d(rn) */
 534         str++;
 535         str = parse_reg (str, operand);
 536         if (operand->error)
 537           return str;
 538
 539         str = skip_whitespace (str);
 540
 541         if (*str != ')')
 542           {
 543             operand->error = _("Missing ')'");
 544             return str;
 545           }
 546
 547         str++;
 548         operand->additional = TRUE;
 549         operand->code |= 060;
 550         switch (operand->reloc.exp.X_op)
 551           {
 552           case O_symbol:
 553             operand->reloc.type = BFD_RELOC_16;
 554             operand->reloc.pc_rel = 0;
 555             break;
 556           case O_constant:
 557             if ((operand->code & 7) == 7)
 558               {
 559                 operand->reloc.pc_rel = 1;
 560                 operand->word = operand->reloc.exp.X_add_number;
 561               }
 562             else
 563               operand->word = operand->reloc.exp.X_add_number;
 564
 565             break;
 566           default:
 567             BAD_CASE (operand->reloc.exp.X_op);
 568           }
 569         break;
 570       }
 571     }
 572
 573   return str;
 574 }
 575
 576 static char *
 577 parse_op_noreg (char *str, struct pdp11_code *operand)
 578 {
 579   str = skip_whitespace (str);
 580   operand->error = NULL;
 581
 582   if (*str == '@' || *str == '*')
 583     {
 584       str = parse_op_no_deferred (str + 1, operand);
 585       if (operand->error)
 586         return str;
 587       operand->code |= 010;
 588     }
 589   else
 590     str = parse_op_no_deferred (str, operand);
 591
 592   return str;
 593 }
 594
 595 static char *
 596 parse_op (char *str, struct pdp11_code *operand)
 597 {
 598   str = skip_whitespace (str);
 599
 600   str = parse_reg (str, operand);
 601   if (!operand->error)
 602     return str;
 603
 604   operand->error = NULL;
 605   parse_ac5 (str, operand);
 606   if (!operand->error)
 607     {
 608       operand->error = _("Float AC not legal as integer operand");
 609       return str;
 610     }
 611
 612   return parse_op_noreg (str, operand);
 613 }
 614
 615 static char *
 616 parse_fop (char *str, struct pdp11_code *operand)
 617 {
 618   str = skip_whitespace (str);
 619
 620   str = parse_ac5 (str, operand);
 621   if (!operand->error)
 622     return str;
 623
 624   operand->error = NULL;
 625   parse_reg (str, operand);
 626   if (!operand->error)
 627     {
 628       operand->error = _("General register not legal as float operand");
 629       return str;
 630     }
 631
 632   return parse_op_noreg (str, operand);
 633 }
 634
 635 static char *
 636 parse_separator (char *str, int *error)
 637 {
 638   str = skip_whitespace (str);
 639   *error = (*str != ',');
 640   if (!*error)
 641     str++;
 642   return str;
 643 }
 644
 645 void
 646 md_assemble (char *instruction_string)
 647 {
 648   const struct pdp11_opcode *op;
 649   struct pdp11_code insn, op1, op2;
 650   int error;
 651   int size;
 652   char *err = NULL;
 653   char *str;
 654   char *p;
 655   char c;
 656
 657   str = skip_whitespace (instruction_string);
 658   p = find_whitespace (str);
 659   if (p - str == 0)
 660     {
 661       as_bad (_("No instruction found"));
 662       return;
 663     }
 664
 665   c = *p;
 666   *p = '\0';
 667   op = (struct pdp11_opcode *)hash_find (insn_hash, str);
 668   *p = c;
 669   if (op == 0)
 670     {
 671       as_bad (_("Unknown instruction '%s'"), str);
 672       return;
 673     }
 674
 675   if (!pdp11_extension[op->extension])
 676     {
 677       as_warn (_("Unsupported instruction set extension: %s"), op->name);
 678       return;
 679     }
 680
 681   insn.error = NULL;
 682   insn.code = op->opcode;
 683   insn.reloc.type = BFD_RELOC_NONE;
 684   op1.error = NULL;
 685   op1.additional = FALSE;
 686   op1.reloc.type = BFD_RELOC_NONE;
 687   op2.error = NULL;
 688   op2.additional = FALSE;
 689   op2.reloc.type = BFD_RELOC_NONE;
 690
 691   str = p;
 692   size = 2;
 693
 694   switch (op->type)
 695     {
 696     case PDP11_OPCODE_NO_OPS:
 697       str = skip_whitespace (str);
 698       break;
 699
 700     case PDP11_OPCODE_IMM3:
 701     case PDP11_OPCODE_IMM6:
 702     case PDP11_OPCODE_IMM8:
 703       str = skip_whitespace (str);
 704       if (*str == '#' || *str == '$')
 705         str++;
 706       str = parse_expression (str, &op1);
 707       if (op1.error)
 708         break;
 709       if (op1.reloc.exp.X_op != O_constant || op1.reloc.type != BFD_RELOC_NONE)
 710         {
 711           op1.error = _("operand is not an absolute constant");
 712           break;
 713         }
 714       switch (op->type)
 715         {
 716         case PDP11_OPCODE_IMM3:
 717           if (op1.reloc.exp.X_add_number & ~7)
 718             {
 719               op1.error = _("3-bit immediate out of range");
 720               break;
 721             }
 722           break;
 723         case PDP11_OPCODE_IMM6:
 724           if (op1.reloc.exp.X_add_number & ~0x3f)
 725             {
 726               op1.error = _("6-bit immediate out of range");
 727               break;
 728             }
 729           break;
 730         case PDP11_OPCODE_IMM8:
 731           if (op1.reloc.exp.X_add_number & ~0xff)
 732             {
 733               op1.error = _("8-bit immediate out of range");
 734               break;
 735             }
 736           break;
 737         }
 738       insn.code |= op1.reloc.exp.X_add_number;
 739       break;
 740
 741     case PDP11_OPCODE_DISPL:
 742       {
 743         char *new_pointer;
 744         new_pointer = parse_expression (str, &op1);
 745         op1.code = 0;
 746         op1.reloc.pc_rel = 1;
 747         op1.reloc.type = BFD_RELOC_PDP11_DISP_8_PCREL;
 748         if (op1.reloc.exp.X_op != O_symbol)
 749           {
 750             op1.error = _("Symbol expected");
 751             break;
 752           }
 753         if (op1.code & ~0xff)
 754           {
 755             err = _("8-bit displacement out of range");
 756             break;
 757           }
 758         str = new_pointer;
 759         insn.code |= op1.code;
 760         insn.reloc = op1.reloc;
 761       }
 762       break;
 763
 764     case PDP11_OPCODE_REG:
 765       str = parse_reg (str, &op1);
 766       if (op1.error)
 767         break;
 768       insn.code |= op1.code;
 769       break;
 770
 771     case PDP11_OPCODE_OP:
 772       str = parse_op (str, &op1);
 773       if (op1.error)
 774         break;
 775       insn.code |= op1.code;
 776       if (op1.additional)
 777         size += 2;
 778       break;
 779
 780     case PDP11_OPCODE_FOP:
 781       str = parse_fop (str, &op1);
 782       if (op1.error)
 783         break;
 784       insn.code |= op1.code;
 785       if (op1.additional)
 786         size += 2;
 787       break;
 788
 789     case PDP11_OPCODE_REG_OP:
 790       str = parse_reg (str, &op2);
 791       if (op2.error)
 792         break;
 793       insn.code |= op2.code << 6;
 794       str = parse_separator (str, &error);
 795       if (error)
 796         {
 797           op2.error = _("Missing ','");
 798           break;
 799         }
 800       str = parse_op (str, &op1);
 801       if (op1.error)
 802         break;
 803       insn.code |= op1.code;
 804       if (op1.additional)
 805         size += 2;
 806       break;
 807
 808     case PDP11_OPCODE_REG_OP_REV:
 809       str = parse_op (str, &op1);
 810       if (op1.error)
 811         break;
 812       insn.code |= op1.code;
 813       if (op1.additional)
 814         size += 2;
 815       str = parse_separator (str, &error);
 816       if (error)
 817         {
 818           op2.error = _("Missing ','");
 819           break;
 820         }
 821       str = parse_reg (str, &op2);
 822       if (op2.error)
 823         break;
 824       insn.code |= op2.code << 6;
 825       break;
 826
 827     case PDP11_OPCODE_AC_FOP:
 828       str = parse_ac (str, &op2);
 829       if (op2.error)
 830         break;
 831       insn.code |= op2.code << 6;
 832       str = parse_separator (str, &error);
 833       if (error)
 834         {
 835           op1.error = _("Missing ','");
 836           break;
 837         }
 838       str = parse_fop (str, &op1);
 839       if (op1.error)
 840         break;
 841       insn.code |= op1.code;
 842       if (op1.additional)
 843         size += 2;
 844       break;
 845
 846     case PDP11_OPCODE_FOP_AC:
 847       str = parse_fop (str, &op1);
 848       if (op1.error)
 849         break;
 850       insn.code |= op1.code;
 851       if (op1.additional)
 852         size += 2;
 853       str = parse_separator (str, &error);
 854       if (error)
 855         {
 856           op1.error = _("Missing ','");
 857           break;
 858         }
 859       str = parse_ac (str, &op2);
 860       if (op2.error)
 861         break;
 862       insn.code |= op2.code << 6;
 863       break;
 864
 865     case PDP11_OPCODE_AC_OP:
 866       str = parse_ac (str, &op2);
 867       if (op2.error)
 868         break;
 869       insn.code |= op2.code << 6;
 870       str = parse_separator (str, &error);
 871       if (error)
 872         {
 873           op1.error = _("Missing ','");
 874           break;
 875         }
 876       str = parse_op (str, &op1);
 877       if (op1.error)
 878         break;
 879       insn.code |= op1.code;
 880       if (op1.additional)
 881         size += 2;
 882       break;
 883
 884     case PDP11_OPCODE_OP_AC:
 885       str = parse_op (str, &op1);
 886       if (op1.error)
 887         break;
 888       insn.code |= op1.code;
 889       if (op1.additional)
 890         size += 2;
 891       str = parse_separator (str, &error);
 892       if (error)
 893         {
 894           op1.error = _("Missing ','");
 895           break;
 896         }
 897       str = parse_ac (str, &op2);
 898       if (op2.error)
 899         break;
 900       insn.code |= op2.code << 6;
 901       break;
 902
 903     case PDP11_OPCODE_OP_OP:
 904       str = parse_op (str, &op1);
 905       if (op1.error)
 906         break;
 907       insn.code |= op1.code << 6;
 908       if (op1.additional)
 909         size += 2;
 910       str = parse_separator (str, &error);
 911       if (error)
 912         {
 913           op2.error = _("Missing ','");
 914           break;
 915         }
 916       str = parse_op (str, &op2);
 917       if (op2.error)
 918         break;
 919       insn.code |= op2.code;
 920       if (op2.additional)
 921         size += 2;
 922       break;
 923
 924     case PDP11_OPCODE_REG_DISPL:
 925       {
 926         char *new_pointer;
 927         str = parse_reg (str, &op2);
 928         if (op2.error)
 929           break;
 930         insn.code |= op2.code << 6;
 931         str = parse_separator (str, &error);
 932         if (error)
 933           {
 934             op1.error = _("Missing ','");
 935             break;
 936           }
 937         new_pointer = parse_expression (str, &op1);
 938         op1.code = 0;
 939         op1.reloc.pc_rel = 1;
 940         op1.reloc.type = BFD_RELOC_PDP11_DISP_6_PCREL;
 941         if (op1.reloc.exp.X_op != O_symbol)
 942           {
 943             op1.error = _("Symbol expected");
 944             break;
 945           }
 946         if (op1.code & ~0x3f)
 947           {
 948             err = _("6-bit displacement out of range");
 949             break;
 950           }
 951         str = new_pointer;
 952         insn.code |= op1.code;
 953         insn.reloc = op1.reloc;
 954       }
 955       break;
 956
 957     default:
 958       BAD_CASE (op->type);
 959     }
 960
 961   if (op1.error)
 962     err = op1.error;
 963   else if (op2.error)
 964     err = op2.error;
 965   else
 966     {
 967       str = skip_whitespace (str);
 968       if (*str)
 969         err = _("Too many operands");
 970     }
 971
 972   {
 973     char *to = NULL;
 974
 975     if (err)
 976       {
 977         as_bad ("%s", err);
 978         return;
 979       }
 980
 981     to = frag_more (size);
 982
 983     md_number_to_chars (to, insn.code, 2);
 984     if (insn.reloc.type != BFD_RELOC_NONE)
 985       fix_new_exp (frag_now, to - frag_now->fr_literal, 2,
 986                    &insn.reloc.exp, insn.reloc.pc_rel, insn.reloc.type);
 987     to += 2;
 988
 989     if (op1.additional)
 990       {
 991         md_number_to_chars (to, op1.word, 2);
 992         if (op1.reloc.type != BFD_RELOC_NONE)
 993           fix_new_exp (frag_now, to - frag_now->fr_literal, 2,
 994                        &op1.reloc.exp, op1.reloc.pc_rel, op1.reloc.type);
 995         to += 2;
 996       }
 997
 998     if (op2.additional)
 999       {
1000         md_number_to_chars (to, op2.word, 2);
1001         if (op2.reloc.type != BFD_RELOC_NONE)
1002           fix_new_exp (frag_now, to - frag_now->fr_literal, 2,
1003                        &op2.reloc.exp, op2.reloc.pc_rel, op2.reloc.type);
1004       }
1005   }
1006 }
1007
1008 int
1009 md_estimate_size_before_relax (fragS *fragP ATTRIBUTE_UNUSED,
1010                                segT segment ATTRIBUTE_UNUSED)
1011 {
1012   return 0;
1013 }
1014
1015 void
1016 md_convert_frag (bfd *headers ATTRIBUTE_UNUSED,
1017                  segT seg ATTRIBUTE_UNUSED,
1018                  fragS *fragP ATTRIBUTE_UNUSED)
1019 {
1020 }
1021
1022 int md_short_jump_size = 2;
1023 int md_long_jump_size = 4;
1024
1025 void
1026 md_create_short_jump (char *ptr ATTRIBUTE_UNUSED,
1027                       addressT from_addr ATTRIBUTE_UNUSED,
1028                       addressT to_addr ATTRIBUTE_UNUSED,
1029                       fragS *frag ATTRIBUTE_UNUSED,
1030                       symbolS *to_symbol ATTRIBUTE_UNUSED)
1031 {
1032 }
1033
1034 void
1035 md_create_long_jump (char *ptr ATTRIBUTE_UNUSED,
1036                      addressT from_addr ATTRIBUTE_UNUSED,
1037                      addressT to_addr ATTRIBUTE_UNUSED,
1038                      fragS *frag ATTRIBUTE_UNUSED,
1039                      symbolS *to_symbol ATTRIBUTE_UNUSED)
1040 {
1041 }
1042
1043 static int
1044 set_cpu_model (const char *arg)
1045 {
1046   char buf[4];
1047   char *model = buf;
1048
1049   if (arg[0] == 'k')
1050     arg++;
1051
1052   *model++ = *arg++;
1053
1054   if (strchr ("abdx", model[-1]) == NULL)
1055     return 0;
1056
1057   if (model[-1] == 'd')
1058     {
1059       if (arg[0] == 'f' || arg[0] == 'j')
1060         model[-1] = *arg++;
1061     }
1062   else if (model[-1] == 'x')
1063     {
1064       if (arg[0] == 't')
1065         model[-1] = *arg++;
1066     }
1067
1068   if (arg[0] == '-')
1069     arg++;
1070
1071   if (strncmp (arg, "11", 2) != 0)
1072     return 0;
1073   arg += 2;
1074
1075   if (arg[0] == '-')
1076     {
1077       if (*++arg == 0)
1078         return 0;
1079     }
1080
1081   /* Allow up to two revision letters.  */
1082   if (arg[0] != 0)
1083     *model++ = *arg++;
1084   if (arg[0] != 0)
1085     *model++ = *arg++;
1086
1087   *model++ = 0;
1088
1089   set_option ("no-extensions");
1090
1091   /* KA11 (11/15/20).  */
1092   if (strncmp (buf, "a", 1) == 0)
1093     return 1; /* No extensions.  */
1094
1095   /* KB11 (11/45/50/55/70).  */
1096   else if (strncmp (buf, "b", 1) == 0)
1097     return set_option ("eis") && set_option ("spl");
1098
1099   /* KD11-A (11/35/40).  */
1100   else if (strncmp (buf, "da", 2) == 0)
1101     return set_option ("limited-eis");
1102
1103   /* KD11-B (11/05/10).  */
1104   else if (strncmp (buf, "db", 2) == 0
1105            /* KD11-D (11/04).  */
1106            || strncmp (buf, "dd", 2) == 0)
1107     return 1; /* no extensions */
1108
1109   /* KD11-E (11/34).  */
1110   else if (strncmp (buf, "de", 2) == 0)
1111     return set_option ("eis") && set_option ("mxps");
1112
1113   /* KD11-F (11/03).  */
1114   else if (strncmp (buf, "df", 2) == 0
1115            /* KD11-H (11/03).  */
1116            || strncmp (buf, "dh", 2) == 0
1117            /* KD11-Q (11/03).  */
1118            || strncmp (buf, "dq", 2) == 0)
1119     return set_option ("limited-eis") && set_option ("mxps");
1120
1121   /* KD11-K (11/60).  */
1122   else if (strncmp (buf, "dk", 2) == 0)
1123     return set_option ("eis")
1124       && set_option ("mxps")
1125       && set_option ("ucode");
1126
1127   /* KD11-Z (11/44).  */
1128   else if (strncmp (buf, "dz", 2) == 0)
1129     return set_option ("csm")
1130       && set_option ("eis")
1131       && set_option ("mfpt")
1132       && set_option ("mxps")
1133       && set_option ("spl");
1134
1135   /* F11 (11/23/24).  */
1136   else if (strncmp (buf, "f", 1) == 0)
1137     return set_option ("eis")
1138       && set_option ("mfpt")
1139       && set_option ("mxps");
1140
1141   /* J11 (11/53/73/83/84/93/94).  */
1142   else if (strncmp (buf, "j", 1) == 0)
1143     return set_option ("csm")
1144       && set_option ("eis")
1145       && set_option ("mfpt")
1146       && set_option ("multiproc")
1147       && set_option ("mxps")
1148       && set_option ("spl");
1149
1150   /* T11 (11/21).  */
1151   else if (strncmp (buf, "t", 1) == 0)
1152     return set_option ("limited-eis")
1153       && set_option ("mxps");
1154
1155   else
1156     return 0;
1157 }
1158
1159 static int
1160 set_machine_model (const char *arg)
1161 {
1162   if (strncmp (arg, "pdp-11/", 7) != 0
1163       && strncmp (arg, "pdp11/", 6) != 0
1164       && strncmp (arg, "11/", 3) != 0)
1165     return 0;
1166
1167   if (strncmp (arg, "pdp", 3) == 0)
1168     arg += 3;
1169   if (arg[0] == '-')
1170     arg++;
1171   if (strncmp (arg, "11/", 3) == 0)
1172     arg += 3;
1173
1174   if (strcmp (arg, "03") == 0)
1175     return set_cpu_model ("kd11f");
1176
1177   else if (strcmp (arg, "04") == 0)
1178     return set_cpu_model ("kd11d");
1179
1180   else if (strcmp (arg, "05") == 0
1181            || strcmp (arg, "10") == 0)
1182     return set_cpu_model ("kd11b");
1183
1184   else if (strcmp (arg, "15") == 0
1185            || strcmp (arg, "20") == 0)
1186     return set_cpu_model ("ka11");
1187
1188   else if (strcmp (arg, "21") == 0)
1189     return set_cpu_model ("t11");
1190
1191   else if (strcmp (arg, "23") == 0
1192            || strcmp (arg, "24") == 0)
1193     return set_cpu_model ("f11");
1194
1195   else if (strcmp (arg, "34") == 0
1196            || strcmp (arg, "34a") == 0)
1197     return set_cpu_model ("kd11e");
1198
1199   else if (strcmp (arg, "35") == 0
1200            || strcmp (arg, "40") == 0)
1201     return set_cpu_model ("kd11da");
1202
1203   else if (strcmp (arg, "44") == 0)
1204     return set_cpu_model ("kd11dz");
1205
1206   else if (strcmp (arg, "45") == 0
1207            || strcmp (arg, "50") == 0
1208            || strcmp (arg, "55") == 0
1209            || strcmp (arg, "70") == 0)
1210     return set_cpu_model ("kb11");
1211
1212   else if (strcmp (arg, "60") == 0)
1213     return set_cpu_model ("kd11k");
1214
1215   else if (strcmp (arg, "53") == 0
1216            || strcmp (arg, "73") == 0
1217            || strcmp (arg, "83") == 0
1218            || strcmp (arg, "84") == 0
1219            || strcmp (arg, "93") == 0
1220            || strcmp (arg, "94") == 0)
1221     return set_cpu_model ("j11")
1222       && set_option ("fpp");
1223
1224   else
1225     return 0;
1226 }
1227
1228 const char *md_shortopts = "m:";
1229
1230 struct option md_longopts[] =
1231 {
1232 #define OPTION_CPU 257
1233   { "cpu", required_argument, NULL, OPTION_CPU },
1234 #define OPTION_MACHINE 258
1235   { "machine", required_argument, NULL, OPTION_MACHINE },
1236 #define OPTION_PIC 259
1237   { "pic", no_argument, NULL, OPTION_PIC },
1238   { NULL, no_argument, NULL, 0 }
1239 };
1240
1241 size_t md_longopts_size = sizeof (md_longopts);
1242
1243 /* Invocation line includes a switch not recognized by the base assembler.
1244    See if it's a processor-specific option.  */
1245
1246 int
1247 md_parse_option (int c, const char *arg)
1248 {
1249   init_defaults ();
1250
1251   switch (c)
1252     {
1253     case 'm':
1254       if (set_option (arg))
1255         return 1;
1256       if (set_cpu_model (arg))
1257         return 1;
1258       if (set_machine_model (arg))
1259         return 1;
1260       break;
1261
1262     case OPTION_CPU:
1263       if (set_cpu_model (arg))
1264         return 1;
1265       break;
1266
1267     case OPTION_MACHINE:
1268       if (set_machine_model (arg))
1269         return 1;
1270       break;
1271
1272     case OPTION_PIC:
1273       if (set_option ("pic"))
1274         return 1;
1275       break;
1276
1277     default:
1278       break;
1279     }
1280
1281   return 0;
1282 }
1283
1284 void
1285 md_show_usage (FILE *stream)
1286 {
1287   fprintf (stream, "\
1288 \n\
1289 PDP-11 instruction set extentions:\n\
1290 \n\
1291 -m(no-)cis              allow (disallow) commersial instruction set\n\
1292 -m(no-)csm              allow (disallow) CSM instruction\n\
1293 -m(no-)eis              allow (disallow) full extended instruction set\n\
1294 -m(no-)fis              allow (disallow) KEV11 floating-point instructions\n\
1295 -m(no-)fpp              allow (disallow) FP-11 floating-point instructions\n\
1296 -m(no-)fpu              allow (disallow) FP-11 floating-point instructions\n\
1297 -m(no-)limited-eis      allow (disallow) limited extended instruction set\n\
1298 -m(no-)mfpt             allow (disallow) processor type instruction\n\
1299 -m(no-)multiproc        allow (disallow) multiprocessor instructions\n\
1300 -m(no-)mxps             allow (disallow) processor status instructions\n\
1301 -m(no-)spl              allow (disallow) SPL instruction\n\
1302 -m(no-)ucode            allow (disallow) microcode instructions\n\
1303 -mall-extensions        allow all instruction set extensions\n\
1304                         (this is the default)\n\
1305 -mno-extentions         disallow all instruction set extensions\n\
1306 -pic                    generate position-indepenent code\n\
1307 \n\
1308 PDP-11 CPU model options:\n\
1309 \n\
1310 -mka11*                 KA11 CPU.  base line instruction set only\n\
1311 -mkb11*                 KB11 CPU.  enable full EIS and SPL\n\
1312 -mkd11a*                KD11-A CPU.  enable limited EIS\n\
1313 -mkd11b*                KD11-B CPU.  base line instruction set only\n\
1314 -mkd11d*                KD11-D CPU.  base line instruction set only\n\
1315 -mkd11e*                KD11-E CPU.  enable full EIS, MTPS, and MFPS\n\
1316 -mkd11f*                KD11-F CPU.  enable limited EIS, MTPS, and MFPS\n\
1317 -mkd11h*                KD11-H CPU.  enable limited EIS, MTPS, and MFPS\n\
1318 -mkd11q*                KD11-Q CPU.  enable limited EIS, MTPS, and MFPS\n\
1319 -mkd11k*                KD11-K CPU.  enable full EIS, MTPS, MFPS, LDUB, MED,\n\
1320                         XFC, and MFPT\n\
1321 -mkd11z*                KD11-Z CPU.  enable full EIS, MTPS, MFPS, MFPT, SPL,\n\
1322                         and CSM\n\
1323 -mf11*                  F11 CPU.  enable full EIS, MFPS, MTPS, and MFPT\n\
1324 -mj11*                  J11 CPU.  enable full EIS, MTPS, MFPS, MFPT, SPL,\n\
1325                         CSM, TSTSET, and WRTLCK\n\
1326 -mt11*                  T11 CPU.  enable limited EIS, MTPS, and MFPS\n\
1327 \n\
1328 PDP-11 machine model options:\n\
1329 \n\
1330 -m11/03                 same as -mkd11f\n\
1331 -m11/04                 same as -mkd11d\n\
1332 -m11/05                 same as -mkd11b\n\
1333 -m11/10                 same as -mkd11b\n\
1334 -m11/15                 same as -mka11\n\
1335 -m11/20                 same as -mka11\n\
1336 -m11/21                 same as -mt11\n\
1337 -m11/23                 same as -mf11\n\
1338 -m11/24                 same as -mf11\n\
1339 -m11/34                 same as -mkd11e\n\
1340 -m11/34a                same as -mkd11e -mfpp\n\
1341 -m11/35                 same as -mkd11a\n\
1342 -m11/40                 same as -mkd11a\n\
1343 -m11/44                 same as -mkd11z\n\
1344 -m11/45                 same as -mkb11\n\
1345 -m11/50                 same as -mkb11\n\
1346 -m11/53                 same as -mj11\n\
1347 -m11/55                 same as -mkb11\n\
1348 -m11/60                 same as -mkd11k\n\
1349 -m11/70                 same as -mkb11\n\
1350 -m11/73                 same as -mj11\n\
1351 -m11/83                 same as -mj11\n\
1352 -m11/84                 same as -mj11\n\
1353 -m11/93                 same as -mj11\n\
1354 -m11/94                 same as -mj11\n\
1355 ");
1356 }
1357
1358 symbolS *
1359 md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
1360 {
1361   return 0;
1362 }
1363
1364 valueT
1365 md_section_align (segT segment ATTRIBUTE_UNUSED,
1366                   valueT size)
1367 {
1368   return (size + 1) & ~1;
1369 }
1370
1371 long
1372 md_pcrel_from (fixS *fixP)
1373 {
1374   return fixP->fx_frag->fr_address + fixP->fx_where + fixP->fx_size;
1375 }
1376
1377 /* Translate internal representation of relocation info to BFD target
1378    format.  */
1379
1380 arelent *
1381 tc_gen_reloc (asection *section ATTRIBUTE_UNUSED,
1382               fixS *fixp)
1383 {
1384   arelent *reloc;
1385   bfd_reloc_code_real_type code;
1386
1387   reloc = xmalloc (sizeof (* reloc));
1388
1389   reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *));
1390   *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
1391   reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
1392
1393   /* This is taken account for in md_apply_fix().  */
1394   reloc->addend = -symbol_get_bfdsym (fixp->fx_addsy)->section->vma;
1395
1396   switch (fixp->fx_r_type)
1397     {
1398     case BFD_RELOC_16:
1399       if (fixp->fx_pcrel)
1400         code = BFD_RELOC_16_PCREL;
1401       else
1402         code = BFD_RELOC_16;
1403       break;
1404
1405     case BFD_RELOC_16_PCREL:
1406       code = BFD_RELOC_16_PCREL;
1407       break;
1408
1409     default:
1410       BAD_CASE (fixp->fx_r_type);
1411       return NULL;
1412     }
1413
1414   reloc->howto = bfd_reloc_type_lookup (stdoutput, code);
1415
1416   if (reloc->howto == NULL)
1417     {
1418       as_bad_where (fixp->fx_file, fixp->fx_line,
1419                     _("Can not represent %s relocation in this object file format"),
1420                     bfd_get_reloc_code_name (code));
1421       return NULL;
1422     }
1423
1424   return reloc;
1425 }
1426
1427 void
1428 pseudo_bss (int c ATTRIBUTE_UNUSED)
1429 {
1430   int temp;
1431
1432   temp = get_absolute_expression ();
1433   subseg_set (bss_section, temp);
1434   demand_empty_rest_of_line ();
1435 }
1436
1437 void
1438 pseudo_even (int c ATTRIBUTE_UNUSED)
1439 {
1440   int alignment = 1; /* 2^1 */
1441   frag_align (alignment, 0, 1);
1442   record_alignment (now_seg, alignment);
1443 }
1444
1445 char *
1446 md_atof (int type, char * litP, int * sizeP)
1447 {
1448   return vax_md_atof (type, litP, sizeP);
1449 }