gas/config/tc-z8k.c

   1 /* tc-z8k.c -- Assemble code for the Zilog Z800n
   2    Copyright 1992, 1993, 1994, 1995, 1996, 1998, 2000, 2001, 2002, 2003
   3    Free Software Foundation, Inc.
   4
   5    This file is part of GAS, the GNU Assembler.
   6
   7    GAS is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2, or (at your option)
  10    any later version.
  11
  12    GAS is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GAS; see the file COPYING.  If not, write to the Free
  19    Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  20    02111-1307, USA.  */
  21
  22 /* Written By Steve Chamberlain <sac@cygnus.com>.  */
  23
  24 #define DEFINE_TABLE
  25 #include <stdio.h>
  26
  27 #include "as.h"
  28 #include "bfd.h"
  29 #include "safe-ctype.h"
  30 #include "opcodes/z8k-opc.h"
  31
  32 const char comment_chars[] = "!";
  33 const char line_comment_chars[] = "#";
  34 const char line_separator_chars[] = ";";
  35
  36 extern int machine;
  37 extern int coff_flags;
  38 int segmented_mode;
  39 const int md_reloc_size;
  40
  41 /* This is non-zero if target was set from the command line.  */
  42 static int z8k_target_from_cmdline;
  43
  44 static void s_segm PARAMS ((int));
  45 static void even PARAMS ((int));
  46 static int tohex PARAMS ((int));
  47 static void sval PARAMS ((int));
  48
  49 static void
  50 s_segm (segm)
  51      int segm;
  52 {
  53   if (segm)
  54     {
  55   segmented_mode = 1;
  56   machine = bfd_mach_z8001;
  57   coff_flags = F_Z8001;
  58     }
  59   else
  60     {
  61   segmented_mode = 0;
  62   machine = bfd_mach_z8002;
  63   coff_flags = F_Z8002;
  64     }
  65 }
  66
  67 static void
  68 even (ignore)
  69      int ignore ATTRIBUTE_UNUSED;
  70 {
  71   frag_align (1, 0, 0);
  72   record_alignment (now_seg, 1);
  73 }
  74
  75 static int
  76 tohex (c)
  77      int c;
  78 {
  79   if (ISDIGIT (c))
  80     return c - '0';
  81   if (ISLOWER (c))
  82     return c - 'a' + 10;
  83   return c - 'A' + 10;
  84 }
  85
  86 static void
  87 sval (ignore)
  88      int ignore ATTRIBUTE_UNUSED;
  89 {
  90   SKIP_WHITESPACE ();
  91   if (*input_line_pointer == '\'')
  92     {
  93       int c;
  94       input_line_pointer++;
  95       c = *input_line_pointer++;
  96       while (c != '\'')
  97         {
  98           if (c == '%')
  99             {
 100               c = (tohex (input_line_pointer[0]) << 4)
 101                 | tohex (input_line_pointer[1]);
 102               input_line_pointer += 2;
 103             }
 104           FRAG_APPEND_1_CHAR (c);
 105           c = *input_line_pointer++;
 106         }
 107       demand_empty_rest_of_line ();
 108     }
 109 }
 110
 111 /* This table describes all the machine specific pseudo-ops the assembler
 112    has to support.  The fields are:
 113    pseudo-op name without dot
 114    function to call to execute this pseudo-op
 115    Integer arg to pass to the function
 116    */
 117
 118 const pseudo_typeS md_pseudo_table[] = {
 119   {"int"    , cons            , 2},
 120   {"data.b" , cons            , 1},
 121   {"data.w" , cons            , 2},
 122   {"data.l" , cons            , 4},
 123   {"form"   , listing_psize   , 0},
 124   {"heading", listing_title   , 0},
 125   {"import" , s_ignore        , 0},
 126   {"page"   , listing_eject   , 0},
 127   {"program", s_ignore        , 0},
 128   {"z8001"  , s_segm          , 1},
 129   {"z8002"  , s_segm          , 0},
 130
 131   {"segm"   , s_segm          , 1},
 132   {"unsegm" , s_segm          , 0},
 133   {"unseg"  , s_segm          , 0},
 134   {"name"   , s_app_file      , 0},
 135   {"global" , s_globl         , 0},
 136   {"wval"   , cons            , 2},
 137   {"lval"   , cons            , 4},
 138   {"bval"   , cons            , 1},
 139   {"sval"   , sval            , 0},
 140   {"rsect"  , obj_coff_section, 0},
 141   {"sect"   , obj_coff_section, 0},
 142   {"block"  , s_space         , 0},
 143   {"even"   , even            , 0},
 144   {0        , 0               , 0}
 145 };
 146
 147 const char EXP_CHARS[] = "eE";
 148
 149 /* Chars that mean this number is a floating point constant.
 150    As in 0f12.456
 151    or    0d1.2345e12  */
 152 const char FLT_CHARS[] = "rRsSfFdDxXpP";
 153
 154 /* Opcode mnemonics.  */
 155 static struct hash_control *opcode_hash_control;
 156
 157 void
 158 md_begin ()
 159 {
 160   const opcode_entry_type *opcode;
 161   int idx = -1;
 162
 163   opcode_hash_control = hash_new ();
 164
 165   for (opcode = z8k_table; opcode->name; opcode++)
 166     {
 167       /* Only enter unique codes into the table.  */
 168       if (idx != opcode->idx)
 169         hash_insert (opcode_hash_control, opcode->name, (char *) opcode);
 170       idx = opcode->idx;
 171     }
 172
 173   /* Default to z8002.  */
 174   if (! z8k_target_from_cmdline)
 175     s_segm (0);
 176
 177   /* Insert the pseudo ops, too.  */
 178   for (idx = 0; md_pseudo_table[idx].poc_name; idx++)
 179     {
 180       opcode_entry_type *fake_opcode;
 181       fake_opcode = (opcode_entry_type *) malloc (sizeof (opcode_entry_type));
 182       fake_opcode->name = md_pseudo_table[idx].poc_name;
 183       fake_opcode->func = (void *) (md_pseudo_table + idx);
 184       fake_opcode->opcode = 250;
 185       hash_insert (opcode_hash_control, fake_opcode->name, fake_opcode);
 186     }
 187 }
 188
 189 struct z8k_exp {
 190   char *e_beg;
 191   char *e_end;
 192   expressionS e_exp;
 193 };
 194
 195 typedef struct z8k_op {
 196   /* CLASS_REG_xxx.  */
 197   int regsize;
 198
 199   /* 0 .. 15.  */
 200   unsigned int reg;
 201
 202   int mode;
 203
 204   /* Any other register associated with the mode.  */
 205   unsigned int x_reg;
 206
 207   /* Any expression.  */
 208   expressionS exp;
 209 } op_type;
 210
 211 static expressionS *da_operand;
 212 static expressionS *imm_operand;
 213
 214 int reg[16];
 215 int the_cc;
 216 int the_ctrl;
 217 int the_flags;
 218 int the_interrupt;
 219
 220 static char *whatreg PARAMS ((int *, char *));
 221 static char *parse_reg PARAMS ((char *, int *, unsigned int *));
 222 static char *parse_exp PARAMS ((char *, expressionS *));
 223 static char *checkfor PARAMS ((char *, char));
 224 static void regword PARAMS ((int, char *));
 225 static void regaddr PARAMS ((int, char *));
 226 static void get_ctrl_operand
 227   PARAMS ((char **, struct z8k_op *, unsigned int));
 228 static void get_flags_operand
 229   PARAMS ((char **, struct z8k_op *, unsigned int));
 230 static void get_interrupt_operand
 231   PARAMS ((char **, struct z8k_op *, unsigned int));
 232 static void get_cc_operand
 233   PARAMS ((char **, struct z8k_op *, unsigned int));
 234 static void get_operand
 235   PARAMS ((char **, struct z8k_op *, unsigned int));
 236 static char *get_operands
 237   PARAMS ((const opcode_entry_type *, char *, op_type *));
 238 static opcode_entry_type *get_specific
 239   PARAMS ((opcode_entry_type *, op_type *));
 240 static void newfix
 241   PARAMS ((int, int, int, expressionS *));
 242 static char *apply_fix
 243   PARAMS ((char *, int, expressionS *, int));
 244 static void build_bytes
 245   PARAMS ((opcode_entry_type *, struct z8k_op *));
 246
 247 static char *
 248 whatreg (reg, src)
 249      int *reg;
 250      char *src;
 251 {
 252   if (ISDIGIT (src[1]))
 253     {
 254       *reg = (src[0] - '0') * 10 + src[1] - '0';
 255       return src + 2;
 256     }
 257   else
 258     {
 259       *reg = (src[0] - '0');
 260       return src + 1;
 261     }
 262 }
 263
 264 /* Parse operands
 265
 266    rh0-rh7, rl0-rl7
 267    r0-r15
 268    rr0-rr14
 269    rq0--rq12
 270    WREG r0,r1,r2,r3,r4,r5,r6,r7,fp,sp
 271    r0l,r0h,..r7l,r7h
 272    @WREG
 273    @WREG+
 274    @-WREG
 275    #const
 276 */
 277
 278 /* Try to parse a reg name.  Return a pointer to the first character
 279    in SRC after the reg name.  */
 280
 281 static char *
 282 parse_reg (src, mode, reg)
 283      char *src;
 284      int *mode;
 285      unsigned int *reg;
 286 {
 287   char *res = 0;
 288   char regno;
 289
 290   if (src[0] == 's' && src[1] == 'p' && (src[2] == 0 || src[2] == ','))
 291     {
 292       if (segmented_mode)
 293         {
 294           *mode = CLASS_REG_LONG;
 295           *reg = 14;
 296         }
 297       else
 298         {
 299           *mode = CLASS_REG_WORD;
 300           *reg = 15;
 301         }
 302       return src + 2;
 303     }
 304   if (src[0] == 'r')
 305     {
 306       if (src[1] == 'r')
 307         {
 308           if (src[2] < '0' || src[2] > '9')
 309             return res;  /* Assume no register name but a label starting with 'rr'.  */
 310           *mode = CLASS_REG_LONG;
 311           res = whatreg (reg, src + 2);
 312           regno = *reg;
 313           if (regno > 14)
 314             as_bad (_("register rr%d out of range"), regno);
 315           if (regno & 1)
 316             as_bad (_("register rr%d does not exist"), regno);
 317         }
 318       else if (src[1] == 'h')
 319         {
 320           if (src[2] < '0' || src[2] > '9')
 321             return res;  /* Assume no register name but a label starting with 'rh'.  */
 322           *mode = CLASS_REG_BYTE;
 323           res = whatreg (reg, src + 2);
 324           regno = *reg;
 325           if (regno > 7)
 326             as_bad (_("register rh%d out of range"), regno);
 327         }
 328       else if (src[1] == 'l')
 329         {
 330           if (src[2] < '0' || src[2] > '9')
 331             return res;  /* Assume no register name but a label starting with 'rl'.  */
 332           *mode = CLASS_REG_BYTE;
 333           res = whatreg (reg, src + 2);
 334           regno = *reg;
 335           if (regno > 7)
 336             as_bad (_("register rl%d out of range"), regno);
 337           *reg += 8;
 338         }
 339       else if (src[1] == 'q')
 340         {
 341           if (src[2] < '0' || src[2] > '9')
 342             return res;  /* Assume no register name but a label starting with 'rq'.  */
 343           *mode = CLASS_REG_QUAD;
 344           res = whatreg (reg, src + 2);
 345           regno = *reg;
 346           if (regno > 12)
 347             as_bad (_("register rq%d out of range"), regno);
 348           if (regno & 3)
 349             as_bad (_("register rq%d does not exist"), regno);
 350         }
 351       else
 352         {
 353           if (src[1] < '0' || src[1] > '9')
 354             return res;  /* Assume no register name but a label starting with 'r'.  */
 355           *mode = CLASS_REG_WORD;
 356           res = whatreg (reg, src + 1);
 357           regno = *reg;
 358           if (regno > 15)
 359             as_bad (_("register r%d out of range"), regno);
 360         }
 361     }
 362   return res;
 363 }
 364
 365 static char *
 366 parse_exp (s, op)
 367      char *s;
 368      expressionS *op;
 369 {
 370   char *save = input_line_pointer;
 371   char *new;
 372
 373   input_line_pointer = s;
 374   expression (op);
 375   if (op->X_op == O_absent)
 376     as_bad (_("missing operand"));
 377   new = input_line_pointer;
 378   input_line_pointer = save;
 379   return new;
 380 }
 381
 382 /* The many forms of operand:
 383
 384    <rb>
 385    <r>
 386    <rr>
 387    <rq>
 388    @r
 389    #exp
 390    exp
 391    exp(r)
 392    r(#exp)
 393    r(r)
 394    */
 395
 396 static char *
 397 checkfor (ptr, what)
 398      char *ptr;
 399      char what;
 400 {
 401   if (*ptr == what)
 402     ptr++;
 403   else
 404     as_bad (_("expected %c"), what);
 405
 406   return ptr;
 407 }
 408
 409 /* Make sure the mode supplied is the size of a word.  */
 410
 411 static void
 412 regword (mode, string)
 413      int mode;
 414      char *string;
 415 {
 416   int ok;
 417
 418   ok = CLASS_REG_WORD;
 419   if (ok != mode)
 420     {
 421       as_bad (_("register is wrong size for a word %s"), string);
 422     }
 423 }
 424
 425 /* Make sure the mode supplied is the size of an address.  */
 426
 427 static void
 428 regaddr (mode, string)
 429      int mode;
 430      char *string;
 431 {
 432   int ok;
 433
 434   ok = segmented_mode ? CLASS_REG_LONG : CLASS_REG_WORD;
 435   if (ok != mode)
 436     {
 437       as_bad (_("register is wrong size for address %s"), string);
 438     }
 439 }
 440
 441 struct ctrl_names {
 442   int value;
 443   char *name;
 444 };
 445
 446 struct ctrl_names ctrl_table[] = {
 447   { 0x2, "fcw" },
 448   { 0x3, "refresh" },
 449   { 0x4, "psapseg" },
 450   { 0x5, "psapoff" },
 451   { 0x5, "psap" },
 452   { 0x6, "nspseg" },
 453   { 0x7, "nspoff" },
 454   { 0x7, "nsp" },
 455   { 0  , 0 }
 456 };
 457
 458 static void
 459 get_ctrl_operand (ptr, mode, dst)
 460      char **ptr;
 461      struct z8k_op *mode;
 462      unsigned int dst ATTRIBUTE_UNUSED;
 463 {
 464   char *src = *ptr;
 465   int i;
 466
 467   while (*src == ' ')
 468     src++;
 469
 470   mode->mode = CLASS_CTRL;
 471   for (i = 0; ctrl_table[i].name; i++)
 472     {
 473       int j;
 474
 475       for (j = 0; ctrl_table[i].name[j]; j++)
 476         {
 477           if (ctrl_table[i].name[j] != src[j])
 478             goto fail;
 479         }
 480       the_ctrl = ctrl_table[i].value;
 481       *ptr = src + j;
 482       return;
 483     fail:
 484       ;
 485     }
 486   the_ctrl = 0;
 487   return;
 488 }
 489
 490 struct flag_names {
 491   int value;
 492   char *name;
 493
 494 };
 495
 496 struct flag_names flag_table[] = {
 497   { 0x1, "p" },
 498   { 0x1, "v" },
 499   { 0x2, "s" },
 500   { 0x4, "z" },
 501   { 0x8, "c" },
 502   { 0x0, "+" },
 503   { 0, 0 }
 504 };
 505
 506 static void
 507 get_flags_operand (ptr, mode, dst)
 508      char **ptr;
 509      struct z8k_op *mode;
 510      unsigned int dst ATTRIBUTE_UNUSED;
 511 {
 512   char *src = *ptr;
 513   int i;
 514   int j;
 515
 516   while (*src == ' ')
 517     src++;
 518
 519   mode->mode = CLASS_FLAGS;
 520   the_flags = 0;
 521   for (j = 0; j <= 9; j++)
 522     {
 523       if (!src[j])
 524         goto done;
 525       for (i = 0; flag_table[i].name; i++)
 526         {
 527           if (flag_table[i].name[0] == src[j])
 528             {
 529               the_flags = the_flags | flag_table[i].value;
 530               goto match;
 531             }
 532         }
 533       goto done;
 534     match:
 535       ;
 536     }
 537  done:
 538   *ptr = src + j;
 539   return;
 540 }
 541
 542 struct interrupt_names {
 543   int value;
 544   char *name;
 545
 546 };
 547
 548 struct interrupt_names intr_table[] = {
 549   { 0x1, "nvi" },
 550   { 0x2, "vi" },
 551   { 0x3, "both" },
 552   { 0x3, "all" },
 553   { 0, 0 }
 554 };
 555
 556 static void
 557 get_interrupt_operand (ptr, mode, dst)
 558      char **ptr;
 559      struct z8k_op *mode;
 560      unsigned int dst ATTRIBUTE_UNUSED;
 561 {
 562   char *src = *ptr;
 563   int i;
 564
 565   while (*src == ' ')
 566     src++;
 567
 568   mode->mode = CLASS_IMM;
 569   for (i = 0; intr_table[i].name; i++)
 570     {
 571       int j;
 572
 573       for (j = 0; intr_table[i].name[j]; j++)
 574         {
 575           if (intr_table[i].name[j] != src[j])
 576             goto fail;
 577         }
 578       the_interrupt = intr_table[i].value;
 579       *ptr = src + j;
 580       return;
 581     fail:
 582       ;
 583     }
 584   /* No interrupt type specified, opcode won't do anything.  */
 585   as_warn (_("opcode has no effect"));
 586   the_interrupt = 0x0;
 587   return;
 588 }
 589
 590 struct cc_names {
 591   int value;
 592   char *name;
 593 };
 594
 595 struct cc_names table[] = {
 596   { 0x0, "f" },
 597   { 0x1, "lt" },
 598   { 0x2, "le" },
 599   { 0x3, "ule" },
 600   { 0x4, "ov" },
 601   { 0x4, "pe" },
 602   { 0x5, "mi" },
 603   { 0x6, "eq" },
 604   { 0x6, "z" },
 605   { 0x7, "c" },
 606   { 0x7, "ult" },
 607   { 0x8, "t" },
 608   { 0x9, "ge" },
 609   { 0xa, "gt" },
 610   { 0xb, "ugt" },
 611   { 0xc, "nov" },
 612   { 0xc, "po" },
 613   { 0xd, "pl" },
 614   { 0xe, "ne" },
 615   { 0xe, "nz" },
 616   { 0xf, "nc" },
 617   { 0xf, "uge" },
 618   { 0  ,  0 }
 619 };
 620
 621 static void
 622 get_cc_operand (ptr, mode, dst)
 623      char **ptr;
 624      struct z8k_op *mode;
 625      unsigned int dst ATTRIBUTE_UNUSED;
 626 {
 627   char *src = *ptr;
 628   int i;
 629
 630   while (*src == ' ')
 631     src++;
 632
 633   mode->mode = CLASS_CC;
 634   for (i = 0; table[i].name; i++)
 635     {
 636       int j;
 637
 638       for (j = 0; table[i].name[j]; j++)
 639         {
 640           if (table[i].name[j] != src[j])
 641             goto fail;
 642         }
 643       the_cc = table[i].value;
 644       *ptr = src + j;
 645       return;
 646     fail:
 647       ;
 648     }
 649   the_cc = 0x8;
 650 }
 651
 652 static void
 653 get_operand (ptr, mode, dst)
 654      char **ptr;
 655      struct z8k_op *mode;
 656      unsigned int dst ATTRIBUTE_UNUSED;
 657 {
 658   char *src = *ptr;
 659   char *end;
 660
 661   mode->mode = 0;
 662
 663   while (*src == ' ')
 664     src++;
 665   if (*src == '#')
 666     {
 667       mode->mode = CLASS_IMM;
 668       imm_operand = &(mode->exp);
 669       src = parse_exp (src + 1, &(mode->exp));
 670     }
 671   else if (*src == '@')
 672     {
 673       mode->mode = CLASS_IR;
 674       src = parse_reg (src + 1, &mode->regsize, &mode->reg);
 675     }
 676   else
 677     {
 678       int regn;
 679
 680       end = parse_reg (src, &mode->mode, &regn);
 681
 682       if (end)
 683         {
 684           int nw, nr;
 685
 686           src = end;
 687           if (*src == '(')
 688             {
 689               src++;
 690               end = parse_reg (src, &nw, &nr);
 691               if (end)
 692                 {
 693                   /* Got Ra(Rb).  */
 694                   src = end;
 695
 696                   if (*src != ')')
 697                     as_bad (_("Missing ) in ra(rb)"));
 698                   else
 699                     src++;
 700
 701                   regaddr (mode->mode, "ra(rb) ra");
 702 #if 0
 703                   regword (mode->mode, "ra(rb) rb");
 704 #endif
 705                   mode->mode = CLASS_BX;
 706                   mode->reg = regn;
 707                   mode->x_reg = nr;
 708                   reg[ARG_RX] = nr;
 709                 }
 710               else
 711                 {
 712                   /* Got Ra(disp).  */
 713                   if (*src == '#')
 714                     src++;
 715                   src = parse_exp (src, &(mode->exp));
 716                   src = checkfor (src, ')');
 717                   mode->mode = CLASS_BA;
 718                   mode->reg = regn;
 719                   mode->x_reg = 0;
 720                   imm_operand = &(mode->exp);
 721                 }
 722             }
 723           else
 724             {
 725               mode->reg = regn;
 726               mode->x_reg = 0;
 727             }
 728         }
 729       else
 730         {
 731           /* No initial reg.  */
 732           src = parse_exp (src, &(mode->exp));
 733           if (*src == '(')
 734             {
 735               src++;
 736               end = parse_reg (src, &(mode->mode), &regn);
 737               regword (mode->mode, "addr(Ra) ra");
 738               mode->mode = CLASS_X;
 739               mode->reg = regn;
 740               mode->x_reg = 0;
 741               da_operand = &(mode->exp);
 742               src = checkfor (end, ')');
 743             }
 744           else
 745             {
 746               /* Just an address.  */
 747               mode->mode = CLASS_DA;
 748               mode->reg = 0;
 749               mode->x_reg = 0;
 750               da_operand = &(mode->exp);
 751             }
 752         }
 753     }
 754   *ptr = src;
 755 }
 756
 757 static char *
 758 get_operands (opcode, op_end, operand)
 759      const opcode_entry_type *opcode;
 760      char *op_end;
 761      op_type *operand;
 762 {
 763   char *ptr = op_end;
 764   char *savptr;
 765
 766   ptr++;
 767   switch (opcode->noperands)
 768     {
 769     case 0:
 770       operand[0].mode = 0;
 771       operand[1].mode = 0;
 772       break;
 773
 774     case 1:
 775       if (opcode->arg_info[0] == CLASS_CC)
 776         get_cc_operand (&ptr, operand + 0, 0);
 777
 778       else if (opcode->arg_info[0] == CLASS_FLAGS)
 779         get_flags_operand (&ptr, operand + 0, 0);
 780
 781       else if (opcode->arg_info[0] == (CLASS_IMM + (ARG_IMM2)))
 782         get_interrupt_operand (&ptr, operand + 0, 0);
 783
 784       else
 785         get_operand (&ptr, operand + 0, 0);
 786
 787       operand[1].mode = 0;
 788       break;
 789
 790     case 2:
 791       savptr = ptr;
 792       if (opcode->arg_info[0] == CLASS_CC)
 793         get_cc_operand (&ptr, operand + 0, 0);
 794
 795       else if (opcode->arg_info[0] == CLASS_CTRL)
 796         {
 797           get_ctrl_operand (&ptr, operand + 0, 0);
 798
 799           if (the_ctrl == 0)
 800             {
 801               ptr = savptr;
 802               get_operand (&ptr, operand + 0, 0);
 803
 804               if (ptr == 0)
 805                 return NULL;
 806               if (*ptr == ',')
 807                 ptr++;
 808               get_ctrl_operand (&ptr, operand + 1, 1);
 809               return ptr;
 810             }
 811         }
 812       else
 813         get_operand (&ptr, operand + 0, 0);
 814
 815       if (ptr == 0)
 816         return NULL;
 817       if (*ptr == ',')
 818         ptr++;
 819       get_operand (&ptr, operand + 1, 1);
 820       break;
 821
 822     case 3:
 823       get_operand (&ptr, operand + 0, 0);
 824       if (*ptr == ',')
 825         ptr++;
 826       get_operand (&ptr, operand + 1, 1);
 827       if (*ptr == ',')
 828         ptr++;
 829       get_operand (&ptr, operand + 2, 2);
 830       break;
 831
 832     case 4:
 833       get_operand (&ptr, operand + 0, 0);
 834       if (*ptr == ',')
 835         ptr++;
 836       get_operand (&ptr, operand + 1, 1);
 837       if (*ptr == ',')
 838         ptr++;
 839       get_operand (&ptr, operand + 2, 2);
 840       if (*ptr == ',')
 841         ptr++;
 842       get_cc_operand (&ptr, operand + 3, 3);
 843       break;
 844
 845     default:
 846       abort ();
 847     }
 848
 849   return ptr;
 850 }
 851
 852 /* Passed a pointer to a list of opcodes which use different
 853    addressing modes.  Return the opcode which matches the opcodes
 854    provided.  */
 855
 856 static opcode_entry_type *
 857 get_specific (opcode, operands)
 858      opcode_entry_type *opcode;
 859      op_type *operands;
 860 {
 861   opcode_entry_type *this_try = opcode;
 862   int found = 0;
 863   unsigned int noperands = opcode->noperands;
 864
 865   int this_index = opcode->idx;
 866
 867   while (this_index == opcode->idx && !found)
 868     {
 869       unsigned int i;
 870
 871       this_try = opcode++;
 872       for (i = 0; i < noperands; i++)
 873         {
 874           unsigned int mode = operands[i].mode;
 875
 876           if (((mode & CLASS_MASK) == CLASS_IR) && ((this_try->arg_info[i] & CLASS_MASK) == CLASS_IRO))
 877             {
 878               mode = operands[i].mode = (operands[i].mode & ~CLASS_MASK) | CLASS_IRO;
 879             }
 880
 881           if ((mode & CLASS_MASK) != (this_try->arg_info[i] & CLASS_MASK))
 882             {
 883               /* It could be a pc rel operand, if this is a da mode
 884                  and we like disps, then insert it.  */
 885
 886               if (mode == CLASS_DA && this_try->arg_info[i] == CLASS_DISP)
 887                 {
 888                   /* This is the case.  */
 889                   operands[i].mode = CLASS_DISP;
 890                 }
 891               else if (mode == CLASS_BA && this_try->arg_info[i])
 892                 {
 893                   /* Can't think of a way to turn what we've been
 894                      given into something that's OK.  */
 895                   goto fail;
 896                 }
 897               else if (this_try->arg_info[i] & CLASS_PR)
 898                 {
 899                   if (mode == CLASS_REG_LONG && segmented_mode)
 900                     {
 901                       /* OK.  */
 902                     }
 903                   else if (mode == CLASS_REG_WORD && !segmented_mode)
 904                     {
 905                       /* OK.  */
 906                     }
 907                   else
 908                     goto fail;
 909                 }
 910               else
 911                 goto fail;
 912             }
 913           switch (mode & CLASS_MASK)
 914             {
 915             default:
 916               break;
 917             case CLASS_IRO:
 918               if (operands[i].regsize != CLASS_REG_WORD)
 919                 as_bad (_("invalid indirect register size"));
 920               reg[this_try->arg_info[i] & ARG_MASK] = operands[i].reg;
 921               break;
 922             case CLASS_IR:
 923               if ((segmented_mode && operands[i].regsize != CLASS_REG_LONG)
 924                   || (!segmented_mode && operands[i].regsize != CLASS_REG_WORD))
 925                 as_bad (_("invalid indirect register size"));
 926               reg[this_try->arg_info[i] & ARG_MASK] = operands[i].reg;
 927               break;
 928             case CLASS_X:
 929             case CLASS_BA:
 930             case CLASS_BX:
 931             case CLASS_DISP:
 932             case CLASS_REG:
 933             case CLASS_REG_WORD:
 934             case CLASS_REG_BYTE:
 935             case CLASS_REG_QUAD:
 936             case CLASS_REG_LONG:
 937             case CLASS_REGN0:
 938               reg[this_try->arg_info[i] & ARG_MASK] = operands[i].reg;
 939               break;
 940             }
 941         }
 942
 943       found = 1;
 944     fail:
 945       ;
 946     }
 947   if (found)
 948     return this_try;
 949   else
 950     return 0;
 951 }
 952
 953 #if 0 /* Not used.  */
 954 static void
 955 check_operand (operand, width, string)
 956      struct z8k_op *operand;
 957      unsigned int width;
 958      char *string;
 959 {
 960   if (operand->exp.X_add_symbol == 0
 961       && operand->exp.X_op_symbol == 0)
 962     {
 963
 964       /* No symbol involved, let's look at offset, it's dangerous if
 965          any of the high bits are not 0 or ff's, find out by oring or
 966          anding with the width and seeing if the answer is 0 or all
 967          fs.  */
 968       if ((operand->exp.X_add_number & ~width) != 0 &&
 969           (operand->exp.X_add_number | width) != (~0))
 970         {
 971           as_warn (_("operand %s0x%x out of range"),
 972                    string, operand->exp.X_add_number);
 973         }
 974     }
 975
 976 }
 977 #endif
 978
 979 static char buffer[20];
 980
 981 static void
 982 newfix (ptr, type, size, operand)
 983      int ptr;
 984      int type;
 985      int size;   /* nibbles.  */
 986      expressionS *operand;
 987 {
 988   int is_pcrel = 0;
 989
 990   if (operand->X_add_symbol
 991       || operand->X_op_symbol
 992       || operand->X_add_number)
 993     {
 994       switch(type)
 995         {
 996         case R_JR:
 997         case R_DISP7:
 998         case R_CALLR:
 999           is_pcrel = 1;
1000         }
1001       fix_new_exp (frag_now,
1002                    ptr,
1003                    size / 2,
1004                    operand,
1005                    is_pcrel,
1006                    type);
1007     }
1008 }
1009
1010 static char *
1011 apply_fix (ptr, type, operand, size)
1012      char *ptr;
1013      int type;
1014      expressionS *operand;
1015      int size;   /* nibbles.  */
1016 {
1017   long n = operand->X_add_number;
1018
1019   newfix ((ptr - buffer) / 2, type, size + 1, operand);
1020   switch (size)
1021     {
1022     case 8:                     /* 8 nibbles == 32 bits.  */
1023       *ptr++ = n >> 28;
1024       *ptr++ = n >> 24;
1025       *ptr++ = n >> 20;
1026       *ptr++ = n >> 16;
1027     case 4:                     /* 4 nibbles == 16 bits.  */
1028       *ptr++ = n >> 12;
1029       *ptr++ = n >> 8;
1030     case 2:
1031       *ptr++ = n >> 4;
1032     case 1:
1033       *ptr++ = n >> 0;
1034       break;
1035     }
1036   return ptr;
1037 }
1038
1039 /* Now we know what sort of opcodes it is.  Let's build the bytes.  */
1040
1041 #define INSERT(x,y) *x++ = y>>24; *x++ = y>> 16; *x++=y>>8; *x++ =y;
1042
1043 static void
1044 build_bytes (this_try, operand)
1045      opcode_entry_type *this_try;
1046      struct z8k_op *operand ATTRIBUTE_UNUSED;
1047 {
1048   char *output_ptr = buffer;
1049   int c;
1050   int nibble;
1051   unsigned int *class_ptr;
1052
1053   frag_wane (frag_now);
1054   frag_new (0);
1055
1056   memset (buffer, 0, sizeof (buffer));
1057   class_ptr = this_try->byte_info;
1058
1059   for (nibble = 0; (c = *class_ptr++); nibble++)
1060     {
1061
1062       switch (c & CLASS_MASK)
1063         {
1064         default:
1065           abort ();
1066
1067         case CLASS_ADDRESS:
1068           /* Direct address, we don't cope with the SS mode right now.  */
1069           if (segmented_mode)
1070             {
1071               /* da_operand->X_add_number |= 0x80000000;  --  Now set at relocation time.  */
1072               output_ptr = apply_fix (output_ptr, R_IMM32, da_operand, 8);
1073             }
1074           else
1075             {
1076               output_ptr = apply_fix (output_ptr, R_IMM16, da_operand, 4);
1077             }
1078           da_operand = 0;
1079           break;
1080         case CLASS_DISP8:
1081           /* pc rel 8 bit  */
1082           output_ptr = apply_fix (output_ptr, R_JR, da_operand, 2);
1083           da_operand = 0;
1084           break;
1085
1086         case CLASS_0DISP7:
1087           /* pc rel 7 bit  */
1088           *output_ptr = 0;
1089           output_ptr = apply_fix (output_ptr, R_DISP7, da_operand, 2);
1090           da_operand = 0;
1091           break;
1092
1093         case CLASS_1DISP7:
1094           /* pc rel 7 bit  */
1095           *output_ptr = 0x80;
1096           output_ptr = apply_fix (output_ptr, R_DISP7, da_operand, 2);
1097           output_ptr[-2] = 0x8;
1098           da_operand = 0;
1099           break;
1100
1101         case CLASS_BIT_1OR2:
1102           *output_ptr = c & 0xf;
1103           if (imm_operand)
1104             {
1105               if (imm_operand->X_add_number == 2)
1106                 *output_ptr |= 2;
1107               else if (imm_operand->X_add_number != 1)
1108                 as_bad (_("immediate must be 1 or 2"));
1109             }
1110           else
1111             as_bad (_("immediate 1 or 2 expected"));
1112           output_ptr++;
1113           break;
1114         case CLASS_CC:
1115           *output_ptr++ = the_cc;
1116           break;
1117         case CLASS_0CCC:
1118           *output_ptr++ = the_ctrl;
1119           break;
1120         case CLASS_1CCC:
1121           *output_ptr++ = the_ctrl | 0x8;
1122           break;
1123         case CLASS_00II:
1124           *output_ptr++ = (~the_interrupt & 0x3);
1125           break;
1126         case CLASS_01II:
1127           *output_ptr++ = (~the_interrupt & 0x3) | 0x4;
1128           break;
1129         case CLASS_FLAGS:
1130           *output_ptr++ = the_flags;
1131           break;
1132         case CLASS_IGNORE:
1133         case CLASS_BIT:
1134           *output_ptr++ = c & 0xf;
1135           break;
1136         case CLASS_REGN0:
1137           if (reg[c & 0xf] == 0)
1138             as_bad (_("can't use R0 here"));
1139           /* Fall through.  */
1140         case CLASS_REG:
1141         case CLASS_REG_BYTE:
1142         case CLASS_REG_WORD:
1143         case CLASS_REG_LONG:
1144         case CLASS_REG_QUAD:
1145           /* Insert bit mattern of right reg.  */
1146           *output_ptr++ = reg[c & 0xf];
1147           break;
1148         case CLASS_DISP:
1149           switch (c & ARG_MASK)
1150             {
1151             case ARG_DISP12:
1152               output_ptr = apply_fix (output_ptr, R_CALLR, da_operand, 4);
1153               break;
1154             case ARG_DISP16:
1155               output_ptr = apply_fix (output_ptr, R_REL16, da_operand, 4);
1156               break;
1157             default:
1158               output_ptr = apply_fix (output_ptr, R_IMM16, da_operand, 4);
1159             }
1160           da_operand = 0;
1161           break;
1162
1163         case CLASS_IMM:
1164           {
1165             switch (c & ARG_MASK)
1166               {
1167               case ARG_NIM4:
1168                 if (imm_operand->X_add_number > 15)
1169                   {
1170                     as_bad (_("immediate value out of range"));
1171                   }
1172                 imm_operand->X_add_number = -imm_operand->X_add_number;
1173                 output_ptr = apply_fix (output_ptr, R_IMM4L, imm_operand, 1);
1174                 break;
1175               /*case ARG_IMMNMINUS1: not used.  */
1176               case ARG_IMM4M1:
1177                 imm_operand->X_add_number--;
1178                 /* Drop through.  */
1179               case ARG_IMM4:
1180                 if (imm_operand->X_add_number > 15)
1181                   {
1182                     as_bad (_("immediate value out of range"));
1183                   }
1184                 output_ptr = apply_fix (output_ptr, R_IMM4L, imm_operand, 1);
1185                 break;
1186               case ARG_NIM8:
1187                 imm_operand->X_add_number = -imm_operand->X_add_number;
1188                 /* Drop through.  */
1189               case ARG_IMM8:
1190                 output_ptr = apply_fix (output_ptr, R_IMM8, imm_operand, 2);
1191                 break;
1192               case ARG_IMM16:
1193                 output_ptr = apply_fix (output_ptr, R_IMM16, imm_operand, 4);
1194                 break;
1195               case ARG_IMM32:
1196                 output_ptr = apply_fix (output_ptr, R_IMM32, imm_operand, 8);
1197                 break;
1198               default:
1199                 abort ();
1200               }
1201           }
1202         }
1203     }
1204
1205   /* Copy from the nibble buffer into the frag.  */
1206   {
1207     int length = (output_ptr - buffer) / 2;
1208     char *src = buffer;
1209     char *fragp = frag_more (length);
1210
1211     while (src < output_ptr)
1212       {
1213         *fragp = (src[0] << 4) | src[1];
1214         src += 2;
1215         fragp++;
1216       }
1217   }
1218 }
1219
1220 /* This is the guts of the machine-dependent assembler.  STR points to a
1221    machine dependent instruction.  This function is supposed to emit
1222    the frags/bytes it assembles to.  */
1223
1224 void
1225 md_assemble (str)
1226      char *str;
1227 {
1228   char c;
1229   char *op_start;
1230   char *op_end;
1231   struct z8k_op operand[3];
1232   opcode_entry_type *opcode;
1233   opcode_entry_type *prev_opcode;
1234
1235   /* Drop leading whitespace.  */
1236   while (*str == ' ')
1237     str++;
1238
1239   /* Find the op code end.  */
1240   for (op_start = op_end = str;
1241        *op_end != 0 && *op_end != ' ';
1242        op_end++)
1243     ;
1244
1245   if (op_end == op_start)
1246     {
1247       as_bad (_("can't find opcode "));
1248     }
1249   c = *op_end;
1250
1251   *op_end = 0;
1252
1253   opcode = (opcode_entry_type *) hash_find (opcode_hash_control, op_start);
1254
1255   if (opcode == NULL)
1256     {
1257       as_bad (_("unknown opcode"));
1258       return;
1259     }
1260
1261   if (opcode->opcode == 250)
1262     {
1263       pseudo_typeS *p;
1264       char oc;
1265       char *old = input_line_pointer;
1266       *op_end = c;
1267
1268       /* Was really a pseudo op.  */
1269
1270       input_line_pointer = op_end;
1271
1272       oc = *old;
1273       *old = '\n';
1274       while (*input_line_pointer == ' ')
1275         input_line_pointer++;
1276       p = (pseudo_typeS *) (opcode->func);
1277
1278       (p->poc_handler) (p->poc_val);
1279       input_line_pointer = old;
1280       *old = oc;
1281     }
1282   else
1283     {
1284       char *new_input_line_pointer;
1285
1286       new_input_line_pointer = get_operands (opcode, op_end, operand);
1287       if (new_input_line_pointer)
1288         input_line_pointer = new_input_line_pointer;
1289       prev_opcode = opcode; /* XXX is this used ?? */
1290
1291       opcode = get_specific (opcode, operand);
1292
1293       if (opcode == 0)
1294         {
1295           /* Couldn't find an opcode which matched the operands.  */
1296           char *where = frag_more (2);
1297
1298           where[0] = 0x0;
1299           where[1] = 0x0;
1300
1301           as_bad (_("Can't find opcode to match operands"));
1302           return;
1303         }
1304
1305       build_bytes (opcode, operand);
1306     }
1307 }
1308
1309 void
1310 tc_crawl_symbol_chain (headers)
1311      object_headers *headers ATTRIBUTE_UNUSED;
1312 {
1313   printf (_("call to tc_crawl_symbol_chain \n"));
1314 }
1315
1316 /* We have no need to default values of symbols.  */
1317
1318 symbolS *
1319 md_undefined_symbol (name)
1320      char *name ATTRIBUTE_UNUSED;
1321 {
1322   return 0;
1323 }
1324
1325 void
1326 tc_headers_hook (headers)
1327      object_headers *headers ATTRIBUTE_UNUSED;
1328 {
1329   printf (_("call to tc_headers_hook \n"));
1330 }
1331
1332 /* Various routines to kill one day.  */
1333 /* Equal to MAX_PRECISION in atof-ieee.c.  */
1334 #define MAX_LITTLENUMS 6
1335
1336 /* Turn a string in input_line_pointer into a floating point constant
1337    of type TYPE, and store the appropriate bytes in *LITP.  The number
1338    of LITTLENUMS emitted is stored in *SIZEP.  An error message is
1339    returned, or NULL on OK.  */
1340
1341 char *
1342 md_atof (type, litP, sizeP)
1343      char type;
1344      char *litP;
1345      int *sizeP;
1346 {
1347   int prec;
1348   LITTLENUM_TYPE words[MAX_LITTLENUMS];
1349   LITTLENUM_TYPE *wordP;
1350   char *t;
1351
1352   switch (type)
1353     {
1354     case 'f':
1355     case 'F':
1356     case 's':
1357     case 'S':
1358       prec = 2;
1359       break;
1360
1361     case 'd':
1362     case 'D':
1363     case 'r':
1364     case 'R':
1365       prec = 4;
1366       break;
1367
1368     case 'x':
1369     case 'X':
1370       prec = 6;
1371       break;
1372
1373     case 'p':
1374     case 'P':
1375       prec = 6;
1376       break;
1377
1378     default:
1379       *sizeP = 0;
1380       return _("Bad call to MD_ATOF()");
1381     }
1382   t = atof_ieee (input_line_pointer, type, words);
1383   if (t)
1384     input_line_pointer = t;
1385
1386   *sizeP = prec * sizeof (LITTLENUM_TYPE);
1387   for (wordP = words; prec--;)
1388     {
1389       md_number_to_chars (litP, (long) (*wordP++), sizeof (LITTLENUM_TYPE));
1390       litP += sizeof (LITTLENUM_TYPE);
1391     }
1392   return 0;
1393 }
1394 \f
1395 const char *md_shortopts = "z:";
1396
1397 struct option md_longopts[] =
1398   {
1399 #define OPTION_RELAX  (OPTION_MD_BASE)
1400     {"linkrelax", no_argument, NULL, OPTION_RELAX},
1401     {NULL, no_argument, NULL, 0}
1402   };
1403
1404 size_t md_longopts_size = sizeof (md_longopts);
1405
1406 int
1407 md_parse_option (c, arg)
1408      int c;
1409      char *arg;
1410 {
1411   switch (c)
1412     {
1413     case 'z':
1414       if (!strcmp (arg, "8001"))
1415         s_segm (1);
1416       else if (!strcmp (arg, "8002"))
1417         s_segm (0);
1418       else
1419         {
1420           as_bad (_("invalid architecture -z%s"), arg);
1421           return 0;
1422         }
1423       z8k_target_from_cmdline = 1;
1424       break;
1425
1426     case OPTION_RELAX:
1427       linkrelax = 1;
1428       break;
1429
1430     default:
1431       return 0;
1432     }
1433
1434   return 1;
1435 }
1436
1437 void
1438 md_show_usage (stream)
1439      FILE *stream;
1440 {
1441   fprintf (stream, _("\
1442  Z8K options:\n\
1443   -z8001                  generate segmented code\n\
1444   -z8002                  generate unsegmented code\n\
1445   -linkrelax              create linker relaxable code\n"));
1446 }
1447 \f
1448 void
1449 md_convert_frag (headers, seg, fragP)
1450      object_headers *headers ATTRIBUTE_UNUSED;
1451      segT seg ATTRIBUTE_UNUSED;
1452      fragS *fragP ATTRIBUTE_UNUSED;
1453 {
1454   printf (_("call to md_convert_frag\n"));
1455   abort ();
1456 }
1457
1458 valueT
1459 md_section_align (seg, size)
1460      segT seg;
1461      valueT size;
1462 {
1463   return ((size + (1 << section_alignment[(int) seg]) - 1)
1464           & (-1 << section_alignment[(int) seg]));
1465 }
1466
1467 /* Attempt to simplify or eliminate a fixup. To indicate that a fixup
1468    has been eliminated, set fix->fx_done. If fix->fx_addsy is non-NULL,
1469    we will have to generate a reloc entry.  */
1470 void
1471 md_apply_fix3 (fixP, valP, segment)
1472      fixS * fixP;
1473      valueT * valP;
1474      segT segment ATTRIBUTE_UNUSED;
1475 {
1476   long val = * (long *) valP;
1477   char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
1478
1479   switch (fixP->fx_r_type)
1480     {
1481     case R_IMM4L:
1482       buf[0] = (buf[0] & 0xf0) | (val & 0xf);
1483       break;
1484
1485     case R_JR:
1486       if (fixP->fx_addsy)
1487         {
1488           fixP->fx_no_overflow = 1;
1489           fixP->fx_done = 0;
1490         }
1491       else
1492         {
1493       if (val & 1)
1494         as_bad (_("cannot branch to odd address"));
1495       val /= 2;
1496       if (val > 127 || val < -128)
1497             as_warn (_("relative jump out of range"));
1498       *buf++ = val;
1499       fixP->fx_no_overflow = 1;
1500           fixP->fx_done = 1;
1501         }
1502       break;
1503
1504     case R_DISP7:
1505       if (fixP->fx_addsy)
1506         {
1507           fixP->fx_no_overflow = 1;
1508           fixP->fx_done = 0;
1509         }
1510       else
1511         {
1512       if (val & 1)
1513         as_bad (_("cannot branch to odd address"));
1514       val /= 2;
1515           if (val > 0 || val < -127)
1516         as_bad (_("relative jump out of range"));
1517           *buf = (*buf & 0x80) | (-val & 0x7f);
1518       fixP->fx_no_overflow = 1;
1519           fixP->fx_done = 1;
1520         }
1521       break;
1522
1523     case R_CALLR:
1524       if (fixP->fx_addsy)
1525         {
1526           fixP->fx_no_overflow = 1;
1527           fixP->fx_done = 0;
1528         }
1529       else
1530         {
1531           if (val & 1)
1532             as_bad (_("cannot branch to odd address"));
1533           if (val > 4096 || val < -4095)
1534         as_bad (_("relative call out of range"));
1535           val = -val / 2;
1536       *buf = (*buf & 0xf0) | ((val >> 8) & 0xf);
1537       buf++;
1538       *buf++ = val & 0xff;
1539           fixP->fx_no_overflow = 1;
1540           fixP->fx_done = 1;
1541         }
1542       break;
1543
1544     case R_IMM8:
1545       *buf++ = val;
1546       break;
1547
1548     case R_IMM16:
1549       *buf++ = (val >> 8);
1550       *buf++ = val;
1551       break;
1552
1553     case R_IMM32:
1554       *buf++ = (val >> 24);
1555       *buf++ = (val >> 16);
1556       *buf++ = (val >> 8);
1557       *buf++ = val;
1558       break;
1559
1560     case R_REL16:
1561       val = val - fixP->fx_frag->fr_address + fixP->fx_where - fixP->fx_size;
1562       if (val > 32767 || val < -32768)
1563         as_bad (_("relative address out of range"));
1564       *buf++ = (val >> 8);
1565       *buf++ = val;
1566       fixP->fx_no_overflow = 1;
1567       break;
1568
1569 #if 0
1570     case R_DA | R_SEG:
1571       *buf++ = (val >> 16);
1572       *buf++ = 0x00;
1573       *buf++ = (val >> 8);
1574       *buf++ = val;
1575       break;
1576 #endif
1577
1578     case 0:
1579       md_number_to_chars (buf, val, fixP->fx_size);
1580       break;
1581
1582     default:
1583       printf(_("md_apply_fix3: unknown r_type 0x%x\n"), fixP->fx_r_type);
1584       abort ();
1585     }
1586
1587   if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0)
1588     fixP->fx_done = 1;
1589 }
1590
1591 int
1592 md_estimate_size_before_relax (fragP, segment_type)
1593      register fragS *fragP ATTRIBUTE_UNUSED;
1594      register segT segment_type ATTRIBUTE_UNUSED;
1595 {
1596   printf (_("call to md_estimate_size_before_relax\n"));
1597   abort ();
1598 }
1599
1600 /* Put number into target byte order.  */
1601
1602 void
1603 md_number_to_chars (ptr, use, nbytes)
1604      char *ptr;
1605      valueT use;
1606      int nbytes;
1607 {
1608   number_to_chars_bigendian (ptr, use, nbytes);
1609 }
1610
1611 /* On the Z8000, a PC-relative offset is relative to the address of the
1612    instruction plus its size.  */
1613 long
1614 md_pcrel_from (fixP)
1615      fixS *fixP;
1616 {
1617   return fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address;
1618 }
1619
1620 void
1621 tc_coff_symbol_emit_hook (s)
1622      symbolS *s ATTRIBUTE_UNUSED;
1623 {
1624 }
1625
1626 void
1627 tc_reloc_mangle (fix_ptr, intr, base)
1628      fixS *fix_ptr;
1629      struct internal_reloc *intr;
1630      bfd_vma base;
1631
1632 {
1633   symbolS *symbol_ptr;
1634
1635   if (fix_ptr->fx_addsy
1636       && fix_ptr->fx_subsy)
1637     {
1638       symbolS *add = fix_ptr->fx_addsy;
1639       symbolS *sub = fix_ptr->fx_subsy;
1640
1641       if (S_GET_SEGMENT (add) != S_GET_SEGMENT (sub))
1642         as_bad (_("Can't subtract symbols in different sections %s %s"),
1643                 S_GET_NAME (add), S_GET_NAME (sub));
1644       else
1645         {
1646           int diff = S_GET_VALUE (add) - S_GET_VALUE (sub);
1647
1648           fix_ptr->fx_addsy = 0;
1649           fix_ptr->fx_subsy = 0;
1650           fix_ptr->fx_offset += diff;
1651         }
1652     }
1653   symbol_ptr = fix_ptr->fx_addsy;
1654
1655   /* If this relocation is attached to a symbol then it's ok
1656      to output it.  */
1657   if (fix_ptr->fx_r_type == 0)
1658     {
1659       /* cons likes to create reloc32's whatever the size of the reloc.  */
1660       switch (fix_ptr->fx_size)
1661         {
1662         case 2:
1663           intr->r_type = R_IMM16;
1664           break;
1665         case 1:
1666           intr->r_type = R_IMM8;
1667           break;
1668         case 4:
1669           intr->r_type = R_IMM32;
1670           break;
1671         default:
1672           abort ();
1673         }
1674     }
1675   else
1676     intr->r_type = fix_ptr->fx_r_type;
1677
1678   intr->r_vaddr = fix_ptr->fx_frag->fr_address + fix_ptr->fx_where + base;
1679   intr->r_offset = fix_ptr->fx_offset;
1680
1681   if (symbol_ptr)
1682     intr->r_symndx = symbol_ptr->sy_number;
1683   else
1684     intr->r_symndx = -1;
1685 }