gas/config/tc-h8500.c

   1 /* tc-h8500.c -- Assemble code for the Renesas H8/500
   2    Copyright 1993, 1994, 1995, 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 #include <stdio.h>
  25 #include "as.h"
  26 #include "bfd.h"
  27 #include "subsegs.h"
  28 #define DEFINE_TABLE
  29 #define ASSEMBLER_TABLE
  30 #include "opcodes/h8500-opc.h"
  31 #include "safe-ctype.h"
  32
  33 const char comment_chars[] = "!";
  34 const char line_separator_chars[] = ";";
  35 const char line_comment_chars[] = "!#";
  36
  37 /* This table describes all the machine specific pseudo-ops the assembler
  38    has to support.  The fields are:
  39    pseudo-op name without dot
  40    function to call to execute this pseudo-op
  41    Integer arg to pass to the function
  42    */
  43
  44 const pseudo_typeS md_pseudo_table[] =
  45 {
  46   {"int", cons, 2},
  47   {"data.b", cons, 1},
  48   {"data.w", cons, 2},
  49   {"data.l", cons, 4},
  50   {"form", listing_psize, 0},
  51   {"heading", listing_title, 0},
  52   {"import", s_ignore, 0},
  53   {"page", listing_eject, 0},
  54   {"program", s_ignore, 0},
  55   {0, 0, 0}
  56 };
  57
  58 const int md_reloc_size;
  59
  60 const char EXP_CHARS[] = "eE";
  61
  62 /* Chars that mean this number is a floating point constant */
  63 /* As in 0f12.456 */
  64 /* or    0d1.2345e12 */
  65 const char FLT_CHARS[] = "rRsSfFdDxXpP";
  66
  67 #define C(a,b) ENCODE_RELAX(a,b)
  68 #define ENCODE_RELAX(what,length) (((what) << 2) + (length))
  69
  70 #define GET_WHAT(x) ((x>>2))
  71
  72 #define BYTE_DISP 1
  73 #define WORD_DISP 2
  74 #define UNDEF_BYTE_DISP 0
  75 #define UNDEF_WORD_DISP 3
  76
  77 #define BRANCH  1
  78 #define SCB_F   2
  79 #define SCB_TST 3
  80 #define END 4
  81
  82 #define BYTE_F 127
  83 #define BYTE_B -126
  84 #define WORD_F 32767
  85 #define WORD_B 32768
  86
  87 relax_typeS md_relax_table[C (END, 0)] = {
  88   { 0, 0, 0, 0 },
  89   { 0, 0, 0, 0 },
  90   { 0, 0, 0, 0 },
  91   { 0, 0, 0, 0 },
  92
  93   /* BRANCH */
  94   { 0,      0,       0, 0 },
  95   { BYTE_F, BYTE_B,  2, C (BRANCH, WORD_DISP) },
  96   { WORD_F, WORD_B,  3, 0 },
  97   { 0,      0,       3, 0 },
  98
  99   /* SCB_F */
 100   { 0,      0,       0, 0 },
 101   { BYTE_F, BYTE_B,  3, C (SCB_F, WORD_DISP) },
 102   { WORD_F, WORD_B,  8, 0 },
 103   { 0,      0,       8, 0 },
 104
 105   /* SCB_TST */
 106   { 0,      0,       0, 0 },
 107   { BYTE_F, BYTE_B,  3, C (SCB_TST, WORD_DISP) },
 108   { WORD_F, WORD_B, 10, 0 },
 109   { 0,      0,      10, 0 }
 110
 111 };
 112
 113 static struct hash_control *opcode_hash_control;        /* Opcode mnemonics */
 114
 115 /*
 116   This function is called once, at assembler startup time.  This should
 117   set up all the tables, etc. that the MD part of the assembler needs
 118   */
 119
 120 void
 121 md_begin ()
 122 {
 123   const h8500_opcode_info *opcode;
 124   char prev_buffer[100];
 125   int idx = 0;
 126
 127   opcode_hash_control = hash_new ();
 128   prev_buffer[0] = 0;
 129
 130   /* Insert unique names into hash table */
 131   for (opcode = h8500_table; opcode->name; opcode++)
 132     {
 133       if (idx != opcode->idx)
 134         {
 135           hash_insert (opcode_hash_control, opcode->name, (char *) opcode);
 136           idx++;
 137         }
 138     }
 139 }
 140
 141 static int rn;                  /* register number used by RN */
 142 static int rs;                  /* register number used by RS */
 143 static int rd;                  /* register number used by RD */
 144 static int crb;                 /* byte size cr */
 145 static int crw;                 /* word sized cr */
 146 static int cr;                  /* unknown size cr */
 147
 148 static expressionS displacement;/* displacement expression */
 149
 150 static int immediate_inpage;
 151 static expressionS immediate;   /* immediate expression */
 152
 153 static expressionS absolute;    /* absolute expression */
 154
 155 typedef struct
 156 {
 157   int type;
 158   int reg;
 159   expressionS exp;
 160   int page;
 161 }
 162
 163 h8500_operand_info;
 164
 165 /* Try to parse a reg name.  Return the number of chars consumed.  */
 166
 167 static int parse_reg PARAMS ((char *, int *, int *));
 168
 169 static int
 170 parse_reg (src, mode, reg)
 171      char *src;
 172      int *mode;
 173      int *reg;
 174 {
 175   char *end;
 176   int len;
 177
 178   /* Cribbed from get_symbol_end().  */
 179   if (!is_name_beginner (*src) || *src == '\001')
 180     return 0;
 181   end = src + 1;
 182   while (is_part_of_name (*end) || *end == '\001')
 183     end++;
 184   len = end - src;
 185
 186   if (len == 2 && src[0] == 'r')
 187     {
 188       if (src[1] >= '0' && src[1] <= '7')
 189         {
 190           *mode = RN;
 191           *reg = (src[1] - '0');
 192           return len;
 193         }
 194     }
 195   if (len == 2 && src[0] == 's' && src[1] == 'p')
 196     {
 197       *mode = RN;
 198       *reg = 7;
 199       return len;
 200     }
 201   if (len == 3 && src[0] == 'c' && src[1] == 'c' && src[2] == 'r')
 202     {
 203       *mode = CRB;
 204       *reg = 1;
 205       return len;
 206     }
 207   if (len == 2 && src[0] == 's' && src[1] == 'r')
 208     {
 209       *mode = CRW;
 210       *reg = 0;
 211       return len;
 212     }
 213   if (len == 2 && src[0] == 'b' && src[1] == 'r')
 214     {
 215       *mode = CRB;
 216       *reg = 3;
 217       return len;
 218     }
 219   if (len == 2 && src[0] == 'e' && src[1] == 'p')
 220     {
 221       *mode = CRB;
 222       *reg = 4;
 223       return len;
 224     }
 225   if (len == 2 && src[0] == 'd' && src[1] == 'p')
 226     {
 227       *mode = CRB;
 228       *reg = 5;
 229       return len;
 230     }
 231   if (len == 2 && src[0] == 't' && src[1] == 'p')
 232     {
 233       *mode = CRB;
 234       *reg = 7;
 235       return len;
 236     }
 237   if (len == 2 && src[0] == 'f' && src[1] == 'p')
 238     {
 239       *mode = RN;
 240       *reg = 6;
 241       return len;
 242     }
 243   return 0;
 244 }
 245
 246 static char *parse_exp PARAMS ((char *, expressionS *, int *));
 247
 248 static char *
 249 parse_exp (s, op, page)
 250      char *s;
 251      expressionS *op;
 252      int *page;
 253 {
 254   char *save;
 255   char *new;
 256
 257   save = input_line_pointer;
 258
 259   *page = 0;
 260   if (s[0] == '%')
 261     {
 262       if (s[1] == 'p' && s[2] == 'a' && s[3] == 'g' && s[4] == 'e')
 263         {
 264           s += 5;
 265           *page = 'p';
 266         }
 267       if (s[1] == 'h' && s[2] == 'i' && s[3] == '1' && s[4] == '6')
 268         {
 269           s += 5;
 270           *page = 'h';
 271         }
 272       else if (s[1] == 'o' && s[2] == 'f' && s[3] == 'f')
 273         {
 274           s += 4;
 275           *page = 'o';
 276         }
 277     }
 278
 279   input_line_pointer = s;
 280
 281   expression (op);
 282   if (op->X_op == O_absent)
 283     as_bad (_("missing operand"));
 284   new = input_line_pointer;
 285   input_line_pointer = save;
 286   return new;
 287 }
 288
 289 typedef enum
 290   {
 291     exp_signed, exp_unsigned, exp_sandu
 292   } sign_type;
 293
 294 static char *skip_colonthing
 295   PARAMS ((sign_type, char *, h8500_operand_info *, int, int, int, int));
 296
 297 static char *
 298 skip_colonthing (sign, ptr, exp, def, size8, size16, size24)
 299      sign_type sign;
 300      char *ptr;
 301      h8500_operand_info *exp;
 302      int def;
 303      int size8;
 304      int size16;
 305      int size24;
 306 {
 307   ptr = parse_exp (ptr, &exp->exp, &exp->page);
 308   if (*ptr == ':')
 309     {
 310       ptr++;
 311       if (*ptr == '8')
 312         {
 313           ptr++;
 314           exp->type = size8;
 315         }
 316       else if (ptr[0] == '1' && ptr[1] == '6')
 317         {
 318           ptr += 2;
 319           exp->type = size16;
 320         }
 321       else if (ptr[0] == '2' && ptr[1] == '4')
 322         {
 323           if (!size24)
 324             {
 325               as_bad (_(":24 not valid for this opcode"));
 326             }
 327           ptr += 2;
 328           exp->type = size24;
 329         }
 330       else
 331         {
 332           as_bad (_("expect :8,:16 or :24"));
 333           exp->type = size16;
 334         }
 335     }
 336   else
 337     {
 338       if (exp->page == 'p')
 339         {
 340           exp->type = IMM8;
 341         }
 342       else if (exp->page == 'h')
 343         {
 344           exp->type = IMM16;
 345         }
 346       else
 347         {
 348           /* Let's work out the size from the context */
 349           int n = exp->exp.X_add_number;
 350           if (size8
 351               && exp->exp.X_op == O_constant
 352               && ((sign == exp_signed && (n >= -128 && n <= 127))
 353                   || (sign == exp_unsigned && (n >= 0 && (n <= 255)))
 354                   || (sign == exp_sandu && (n >= -128 && (n <= 255)))))
 355             {
 356               exp->type = size8;
 357             }
 358           else
 359             {
 360               exp->type = def;
 361             }
 362         }
 363     }
 364   return ptr;
 365 }
 366
 367 static int parse_reglist PARAMS ((char *, h8500_operand_info *));
 368
 369 static int
 370 parse_reglist (src, op)
 371      char *src;
 372      h8500_operand_info *op;
 373 {
 374   int mode;
 375   int rn;
 376   int mask = 0;
 377   int rm;
 378   int idx = 1;                  /* skip ( */
 379
 380   while (src[idx] && src[idx] != ')')
 381     {
 382       int done = parse_reg (src + idx, &mode, &rn);
 383
 384       if (done)
 385         {
 386           idx += done;
 387           mask |= 1 << rn;
 388         }
 389       else
 390         {
 391           as_bad (_("syntax error in reg list"));
 392           return 0;
 393         }
 394       if (src[idx] == '-')
 395         {
 396           idx++;
 397           done = parse_reg (src + idx, &mode, &rm);
 398           if (done)
 399             {
 400               idx += done;
 401               while (rn <= rm)
 402                 {
 403                   mask |= 1 << rn;
 404                   rn++;
 405                 }
 406             }
 407           else
 408             {
 409               as_bad (_("missing final register in range"));
 410             }
 411         }
 412       if (src[idx] == ',')
 413         idx++;
 414     }
 415   idx++;
 416   op->exp.X_add_symbol = 0;
 417   op->exp.X_op_symbol = 0;
 418   op->exp.X_add_number = mask;
 419   op->exp.X_op = O_constant;
 420   op->exp.X_unsigned = 1;
 421   op->type = IMM8;
 422   return idx;
 423
 424 }
 425
 426 /* The many forms of operand:
 427
 428    Rn                   Register direct
 429    @Rn                  Register indirect
 430    @(disp[:size], Rn)   Register indirect with displacement
 431    @Rn+
 432    @-Rn
 433    @aa[:size]           absolute
 434    #xx[:size]           immediate data
 435
 436    */
 437
 438 static void get_operand PARAMS ((char **, h8500_operand_info *, char));
 439
 440 static void
 441 get_operand (ptr, op, ispage)
 442      char **ptr;
 443      h8500_operand_info *op;
 444      char ispage;
 445 {
 446   char *src = *ptr;
 447   int mode;
 448   unsigned int num;
 449   unsigned int len;
 450   op->page = 0;
 451   if (src[0] == '(' && src[1] == 'r')
 452     {
 453       /* This is a register list */
 454       *ptr = src + parse_reglist (src, op);
 455       return;
 456     }
 457
 458   len = parse_reg (src, &op->type, &op->reg);
 459
 460   if (len)
 461     {
 462       *ptr = src + len;
 463       return;
 464     }
 465
 466   if (*src == '@')
 467     {
 468       src++;
 469       if (*src == '-')
 470         {
 471           src++;
 472           len = parse_reg (src, &mode, &num);
 473           if (len == 0)
 474             {
 475               /* Oops, not a reg after all, must be ordinary exp */
 476               src--;
 477               /* must be a symbol */
 478               *ptr = skip_colonthing (exp_unsigned, src,
 479                                       op, ABS16, ABS8, ABS16, ABS24);
 480               return;
 481             }
 482
 483           op->type = RNDEC;
 484           op->reg = num;
 485           *ptr = src + len;
 486           return;
 487         }
 488       if (*src == '(')
 489         {
 490           /* Disp */
 491           src++;
 492
 493           src = skip_colonthing (exp_signed, src,
 494                                  op, RNIND_D16, RNIND_D8, RNIND_D16, 0);
 495
 496           if (*src != ',')
 497             {
 498               as_bad (_("expected @(exp, Rn)"));
 499               return;
 500             }
 501           src++;
 502           len = parse_reg (src, &mode, &op->reg);
 503           if (len == 0 || mode != RN)
 504             {
 505               as_bad (_("expected @(exp, Rn)"));
 506               return;
 507             }
 508           src += len;
 509           if (*src != ')')
 510             {
 511               as_bad (_("expected @(exp, Rn)"));
 512               return;
 513             }
 514           *ptr = src + 1;
 515           return;
 516         }
 517       len = parse_reg (src, &mode, &num);
 518
 519       if (len)
 520         {
 521           src += len;
 522           if (*src == '+')
 523             {
 524               src++;
 525               if (mode != RN)
 526                 {
 527                   as_bad (_("@Rn+ needs word register"));
 528                   return;
 529                 }
 530               op->type = RNINC;
 531               op->reg = num;
 532               *ptr = src;
 533               return;
 534             }
 535           if (mode != RN)
 536             {
 537               as_bad (_("@Rn needs word register"));
 538               return;
 539             }
 540           op->type = RNIND;
 541           op->reg = num;
 542           *ptr = src;
 543           return;
 544         }
 545       else
 546         {
 547           /* must be a symbol */
 548           *ptr =
 549             skip_colonthing (exp_unsigned, src, op,
 550                              ispage ? ABS24 : ABS16, ABS8, ABS16, ABS24);
 551           return;
 552         }
 553     }
 554
 555   if (*src == '#')
 556     {
 557       src++;
 558       *ptr = skip_colonthing (exp_sandu, src, op, IMM16, IMM8, IMM16, ABS24);
 559       return;
 560     }
 561   else
 562     {
 563       *ptr = skip_colonthing (exp_signed, src, op,
 564                               ispage ? ABS24 : PCREL8, PCREL8, PCREL16, ABS24);
 565     }
 566 }
 567
 568 static char *get_operands
 569   PARAMS ((h8500_opcode_info *, char *, h8500_operand_info *));
 570
 571 static char *
 572 get_operands (info, args, operand)
 573      h8500_opcode_info *info;
 574      char *args;
 575      h8500_operand_info *operand;
 576 {
 577   char *ptr = args;
 578
 579   switch (info->nargs)
 580     {
 581     case 0:
 582       operand[0].type = 0;
 583       operand[1].type = 0;
 584       break;
 585
 586     case 1:
 587       ptr++;
 588       get_operand (&ptr, operand + 0, info->name[0] == 'p');
 589       operand[1].type = 0;
 590       break;
 591
 592     case 2:
 593       ptr++;
 594       get_operand (&ptr, operand + 0, 0);
 595       if (*ptr == ',')
 596         ptr++;
 597       get_operand (&ptr, operand + 1, 0);
 598       break;
 599
 600     default:
 601       abort ();
 602     }
 603
 604   return ptr;
 605 }
 606
 607 /* Passed a pointer to a list of opcodes which use different
 608    addressing modes, return the opcode which matches the opcodes
 609    provided.  */
 610
 611 int pcrel8;                     /* Set when we've seen a pcrel operand */
 612
 613 static h8500_opcode_info *get_specific
 614   PARAMS ((h8500_opcode_info *, h8500_operand_info *));
 615
 616 static h8500_opcode_info *
 617 get_specific (opcode, operands)
 618      h8500_opcode_info *opcode;
 619      h8500_operand_info *operands;
 620 {
 621   h8500_opcode_info *this_try = opcode;
 622   int found = 0;
 623   unsigned int noperands = opcode->nargs;
 624   int this_index = opcode->idx;
 625
 626   while (this_index == opcode->idx && !found)
 627     {
 628       unsigned int i;
 629
 630       this_try = opcode++;
 631
 632       /* look at both operands needed by the opcodes and provided by
 633        the user*/
 634       for (i = 0; i < noperands; i++)
 635         {
 636           h8500_operand_info *user = operands + i;
 637
 638           switch (this_try->arg_type[i])
 639             {
 640             case FPIND_D8:
 641               /* Opcode needs (disp:8,fp) */
 642               if (user->type == RNIND_D8 && user->reg == 6)
 643                 {
 644                   displacement = user->exp;
 645                   continue;
 646                 }
 647               break;
 648             case RDIND_D16:
 649               if (user->type == RNIND_D16)
 650                 {
 651                   displacement = user->exp;
 652                   rd = user->reg;
 653                   continue;
 654                 }
 655               break;
 656             case RDIND_D8:
 657               if (user->type == RNIND_D8)
 658                 {
 659                   displacement = user->exp;
 660                   rd = user->reg;
 661                   continue;
 662                 }
 663               break;
 664             case RNIND_D16:
 665             case RNIND_D8:
 666               if (user->type == this_try->arg_type[i])
 667                 {
 668                   displacement = user->exp;
 669                   rn = user->reg;
 670                   continue;
 671                 }
 672               break;
 673
 674             case SPDEC:
 675               if (user->type == RNDEC && user->reg == 7)
 676                 {
 677                   continue;
 678                 }
 679               break;
 680             case SPINC:
 681               if (user->type == RNINC && user->reg == 7)
 682                 {
 683                   continue;
 684                 }
 685               break;
 686             case ABS16:
 687               if (user->type == ABS16)
 688                 {
 689                   absolute = user->exp;
 690                   continue;
 691                 }
 692               break;
 693             case ABS8:
 694               if (user->type == ABS8)
 695                 {
 696                   absolute = user->exp;
 697                   continue;
 698                 }
 699               break;
 700             case ABS24:
 701               if (user->type == ABS24)
 702                 {
 703                   absolute = user->exp;
 704                   continue;
 705                 }
 706               break;
 707
 708             case CRB:
 709               if ((user->type == CRB || user->type == CR) && user->reg != 0)
 710                 {
 711                   crb = user->reg;
 712                   continue;
 713                 }
 714               break;
 715             case CRW:
 716               if ((user->type == CRW || user->type == CR) && user->reg == 0)
 717                 {
 718                   crw = user->reg;
 719                   continue;
 720                 }
 721               break;
 722             case DISP16:
 723               if (user->type == DISP16)
 724                 {
 725                   displacement = user->exp;
 726                   continue;
 727                 }
 728               break;
 729             case DISP8:
 730               if (user->type == DISP8)
 731                 {
 732                   displacement = user->exp;
 733                   continue;
 734                 }
 735               break;
 736             case FP:
 737               if (user->type == RN && user->reg == 6)
 738                 {
 739                   continue;
 740                 }
 741               break;
 742             case PCREL16:
 743               if (user->type == PCREL16)
 744                 {
 745                   displacement = user->exp;
 746                   continue;
 747                 }
 748               break;
 749             case PCREL8:
 750               if (user->type == PCREL8)
 751                 {
 752                   displacement = user->exp;
 753                   pcrel8 = 1;
 754                   continue;
 755                 }
 756               break;
 757
 758             case IMM16:
 759               if (user->type == IMM16
 760                   || user->type == IMM8)
 761                 {
 762                   immediate_inpage = user->page;
 763                   immediate = user->exp;
 764                   continue;
 765                 }
 766               break;
 767             case RLIST:
 768             case IMM8:
 769               if (user->type == IMM8)
 770                 {
 771                   immediate_inpage = user->page;
 772                   immediate = user->exp;
 773                   continue;
 774                 }
 775               break;
 776             case IMM4:
 777               if (user->type == IMM8)
 778                 {
 779                   immediate_inpage = user->page;
 780                   immediate = user->exp;
 781                   continue;
 782                 }
 783               break;
 784             case QIM:
 785               if (user->type == IMM8
 786                   && user->exp.X_op == O_constant
 787                   &&
 788                   (user->exp.X_add_number == -2
 789                    || user->exp.X_add_number == -1
 790                    || user->exp.X_add_number == 1
 791                    || user->exp.X_add_number == 2))
 792                 {
 793                   immediate_inpage = user->page;
 794                   immediate = user->exp;
 795                   continue;
 796                 }
 797               break;
 798             case RD:
 799               if (user->type == RN)
 800                 {
 801                   rd = user->reg;
 802                   continue;
 803                 }
 804               break;
 805             case RS:
 806               if (user->type == RN)
 807                 {
 808                   rs = user->reg;
 809                   continue;
 810                 }
 811               break;
 812             case RDIND:
 813               if (user->type == RNIND)
 814                 {
 815                   rd = user->reg;
 816                   continue;
 817
 818                 }
 819               break;
 820             case RNINC:
 821             case RNIND:
 822             case RNDEC:
 823             case RN:
 824
 825               if (user->type == this_try->arg_type[i])
 826                 {
 827                   rn = user->reg;
 828                   continue;
 829                 }
 830               break;
 831             case SP:
 832               if (user->type == RN && user->reg == 7)
 833                 {
 834                   continue;
 835                 }
 836               break;
 837             default:
 838               printf (_("unhandled %d\n"), this_try->arg_type[i]);
 839               break;
 840             }
 841
 842           /* If we get here this didn't work out */
 843           goto fail;
 844         }
 845       found = 1;
 846     fail:;
 847
 848     }
 849
 850   if (found)
 851     return this_try;
 852   else
 853     return 0;
 854 }
 855
 856 static int check PARAMS ((expressionS *, int, int));
 857
 858 static int
 859 check (operand, low, high)
 860      expressionS *operand;
 861      int low;
 862      int high;
 863 {
 864   if (operand->X_op != O_constant
 865       || operand->X_add_number < low
 866       || operand->X_add_number > high)
 867     {
 868       as_bad (_("operand must be absolute in range %d..%d"), low, high);
 869     }
 870   return operand->X_add_number;
 871 }
 872
 873 static void insert PARAMS ((char *, int, expressionS *, int, int));
 874
 875 static void
 876 insert (output, index, exp, reloc, pcrel)
 877      char *output;
 878      int index;
 879      expressionS *exp;
 880      int reloc;
 881      int pcrel;
 882 {
 883   fix_new_exp (frag_now,
 884                output - frag_now->fr_literal + index,
 885                4,               /* always say size is 4, but we know better */
 886                exp,
 887                pcrel,
 888                reloc);
 889 }
 890
 891 static void build_relaxable_instruction
 892   PARAMS ((h8500_opcode_info *, h8500_operand_info *));
 893
 894 static void
 895 build_relaxable_instruction (opcode, operand)
 896      h8500_opcode_info *opcode;
 897      h8500_operand_info *operand ATTRIBUTE_UNUSED;
 898 {
 899   /* All relaxable instructions start life as two bytes but can become
 900      three bytes long if a lonely branch and up to 9 bytes if long
 901      scb.  */
 902   char *p;
 903   int len;
 904   int type;
 905
 906   if (opcode->bytes[0].contents == 0x01)
 907     {
 908       type = SCB_F;
 909     }
 910   else if (opcode->bytes[0].contents == 0x06
 911            || opcode->bytes[0].contents == 0x07)
 912     {
 913       type = SCB_TST;
 914     }
 915   else
 916     {
 917       type = BRANCH;
 918     }
 919
 920   p = frag_var (rs_machine_dependent,
 921                 md_relax_table[C (type, WORD_DISP)].rlx_length,
 922                 len = md_relax_table[C (type, BYTE_DISP)].rlx_length,
 923                 C (type, UNDEF_BYTE_DISP),
 924                 displacement.X_add_symbol,
 925                 displacement.X_add_number,
 926                 0);
 927
 928   p[0] = opcode->bytes[0].contents;
 929   if (type != BRANCH)
 930     {
 931       p[1] = opcode->bytes[1].contents | rs;
 932     }
 933 }
 934
 935 /* Now we know what sort of opcodes it is, let's build the bytes.  */
 936
 937 static void build_bytes PARAMS ((h8500_opcode_info *, h8500_operand_info *));
 938
 939 static void
 940 build_bytes (opcode, operand)
 941      h8500_opcode_info *opcode;
 942      h8500_operand_info *operand;
 943 {
 944   int index;
 945
 946   if (pcrel8)
 947     {
 948       pcrel8 = 0;
 949       build_relaxable_instruction (opcode, operand);
 950     }
 951   else
 952     {
 953       char *output = frag_more (opcode->length);
 954
 955       memset (output, 0, opcode->length);
 956       for (index = 0; index < opcode->length; index++)
 957         {
 958           output[index] = opcode->bytes[index].contents;
 959
 960           switch (opcode->bytes[index].insert)
 961             {
 962             default:
 963               printf (_("failed for %d\n"), opcode->bytes[index].insert);
 964               break;
 965             case 0:
 966               break;
 967             case RN:
 968               output[index] |= rn;
 969               break;
 970             case RD:
 971             case RDIND:
 972               output[index] |= rd;
 973               break;
 974             case RS:
 975               output[index] |= rs;
 976               break;
 977             case DISP16:
 978               insert (output, index, &displacement, R_H8500_IMM16, 0);
 979               index++;
 980               break;
 981             case DISP8:
 982             case FPIND_D8:
 983               insert (output, index, &displacement, R_H8500_IMM8, 0);
 984               break;
 985             case IMM16:
 986               {
 987                 int p;
 988
 989                 switch (immediate_inpage)
 990                   {
 991                   case 'p':
 992                     p = R_H8500_HIGH16;
 993                     break;
 994                   case 'h':
 995                     p = R_H8500_HIGH16;
 996                     break;
 997                   default:
 998                     p = R_H8500_IMM16;
 999                     break;
1000                   }
1001                 insert (output, index, &immediate, p, 0);
1002               }
1003               index++;
1004               break;
1005             case RLIST:
1006             case IMM8:
1007               if (immediate_inpage)
1008                 insert (output, index, &immediate, R_H8500_HIGH8, 0);
1009               else
1010                 insert (output, index, &immediate, R_H8500_IMM8, 0);
1011               break;
1012             case PCREL16:
1013               insert (output, index, &displacement, R_H8500_PCREL16, 1);
1014               index++;
1015               break;
1016             case PCREL8:
1017               insert (output, index, &displacement, R_H8500_PCREL8, 1);
1018               break;
1019             case IMM4:
1020               output[index] |= check (&immediate, 0, 15);
1021               break;
1022             case CR:
1023               output[index] |= cr;
1024               if (cr == 0)
1025                 output[0] |= 0x8;
1026               else
1027                 output[0] &= ~0x8;
1028               break;
1029             case CRB:
1030               output[index] |= crb;
1031               output[0] &= ~0x8;
1032               break;
1033             case CRW:
1034               output[index] |= crw;
1035               output[0] |= 0x8;
1036               break;
1037             case ABS24:
1038               insert (output, index, &absolute, R_H8500_IMM24, 0);
1039               index += 2;
1040               break;
1041             case ABS16:
1042               insert (output, index, &absolute, R_H8500_IMM16, 0);
1043               index++;
1044               break;
1045             case ABS8:
1046               insert (output, index, &absolute, R_H8500_IMM8, 0);
1047               break;
1048             case QIM:
1049               switch (immediate.X_add_number)
1050                 {
1051                 case -2:
1052                   output[index] |= 0x5;
1053                   break;
1054                 case -1:
1055                   output[index] |= 0x4;
1056                   break;
1057                 case 1:
1058                   output[index] |= 0;
1059                   break;
1060                 case 2:
1061                   output[index] |= 1;
1062                   break;
1063                 }
1064               break;
1065             }
1066         }
1067     }
1068 }
1069
1070 /* This is the guts of the machine-dependent assembler.  STR points to
1071    a machine dependent instruction.  This function is supposed to emit
1072    the frags/bytes it assembles to.  */
1073
1074 void
1075 md_assemble (str)
1076      char *str;
1077 {
1078   char *op_start;
1079   char *op_end;
1080   h8500_operand_info operand[2];
1081   h8500_opcode_info *opcode;
1082   h8500_opcode_info *prev_opcode;
1083   char name[11];
1084
1085   int nlen = 0;
1086
1087   /* Drop leading whitespace.  */
1088   while (*str == ' ')
1089     str++;
1090
1091   /* Find the op code end.  */
1092   for (op_start = op_end = str;
1093        !is_end_of_line[(unsigned char) *op_end] && *op_end != ' ';
1094        op_end++)
1095     {
1096       if (                      /**op_end != '.'
1097           && *op_end != ':'
1098                                   && */ nlen < 10)
1099         {
1100           name[nlen++] = *op_end;
1101         }
1102     }
1103   name[nlen] = 0;
1104
1105   if (op_end == op_start)
1106     as_bad (_("can't find opcode "));
1107
1108   opcode = (h8500_opcode_info *) hash_find (opcode_hash_control, name);
1109
1110   if (opcode == NULL)
1111     {
1112       as_bad (_("unknown opcode"));
1113       return;
1114     }
1115
1116   get_operands (opcode, op_end, operand);
1117   prev_opcode = opcode;
1118
1119   opcode = get_specific (opcode, operand);
1120
1121   if (opcode == 0)
1122     {
1123       /* Couldn't find an opcode which matched the operands */
1124       char *where = frag_more (2);
1125
1126       where[0] = 0x0;
1127       where[1] = 0x0;
1128       as_bad (_("invalid operands for opcode"));
1129       return;
1130     }
1131
1132   build_bytes (opcode, operand);
1133 }
1134
1135 void
1136 tc_crawl_symbol_chain (headers)
1137      object_headers *headers ATTRIBUTE_UNUSED;
1138 {
1139   printf (_("call to tc_crawl_symbol_chain \n"));
1140 }
1141
1142 symbolS *
1143 md_undefined_symbol (name)
1144      char *name ATTRIBUTE_UNUSED;
1145 {
1146   return 0;
1147 }
1148
1149 void
1150 tc_headers_hook (headers)
1151      object_headers *headers ATTRIBUTE_UNUSED;
1152 {
1153   printf (_("call to tc_headers_hook \n"));
1154 }
1155
1156 /* Various routines to kill one day.  */
1157 /* Equal to MAX_PRECISION in atof-ieee.c.  */
1158 #define MAX_LITTLENUMS 6
1159
1160 /* Turn a string in input_line_pointer into a floating point constant
1161    of type type, and store the appropriate bytes in *LITP.  The number
1162    of LITTLENUMS emitted is stored in *SIZEP.  An error message is
1163    returned, or NULL on OK.  */
1164
1165 char *
1166 md_atof (type, litP, sizeP)
1167      char type;
1168      char *litP;
1169      int *sizeP;
1170 {
1171   int prec;
1172   LITTLENUM_TYPE words[MAX_LITTLENUMS];
1173   LITTLENUM_TYPE *wordP;
1174   char *t;
1175
1176   switch (type)
1177     {
1178     case 'f':
1179     case 'F':
1180     case 's':
1181     case 'S':
1182       prec = 2;
1183       break;
1184
1185     case 'd':
1186     case 'D':
1187     case 'r':
1188     case 'R':
1189       prec = 4;
1190       break;
1191
1192     case 'x':
1193     case 'X':
1194       prec = 6;
1195       break;
1196
1197     case 'p':
1198     case 'P':
1199       prec = 6;
1200       break;
1201
1202     default:
1203       *sizeP = 0;
1204       return _("Bad call to MD_ATOF()");
1205     }
1206   t = atof_ieee (input_line_pointer, type, words);
1207   if (t)
1208     input_line_pointer = t;
1209
1210   *sizeP = prec * sizeof (LITTLENUM_TYPE);
1211   for (wordP = words; prec--;)
1212     {
1213       md_number_to_chars (litP, (long) (*wordP++), sizeof (LITTLENUM_TYPE));
1214       litP += sizeof (LITTLENUM_TYPE);
1215     }
1216   return 0;
1217 }
1218 \f
1219 const char *md_shortopts = "";
1220 struct option md_longopts[] = {
1221   {NULL, no_argument, NULL, 0}
1222 };
1223 size_t md_longopts_size = sizeof (md_longopts);
1224
1225 int
1226 md_parse_option (c, arg)
1227      int c ATTRIBUTE_UNUSED;
1228      char *arg ATTRIBUTE_UNUSED;
1229 {
1230   return 0;
1231 }
1232
1233 void
1234 md_show_usage (stream)
1235      FILE *stream ATTRIBUTE_UNUSED;
1236 {
1237 }
1238 \f
1239 static void wordify_scb PARAMS ((char *, int *, int *));
1240
1241 static void
1242 wordify_scb (buffer, disp_size, inst_size)
1243      char *buffer;
1244      int *disp_size;
1245      int *inst_size;
1246 {
1247   int rn = buffer[1] & 0x7;
1248
1249   switch (buffer[0])
1250     {
1251     case 0x0e:                  /* BSR */
1252     case 0x20:
1253     case 0x21:
1254     case 0x22:
1255     case 0x23:
1256     case 0x24:
1257     case 0x25:
1258     case 0x26:
1259     case 0x27:
1260     case 0x28:
1261     case 0x29:
1262     case 0x2a:
1263     case 0x2b:
1264     case 0x2c:
1265     case 0x2d:
1266     case 0x2e:
1267     case 0x2f:
1268       buffer[0] |= 0x10;
1269       buffer[1] = 0;
1270       buffer[2] = 0;
1271       *disp_size = 2;
1272       *inst_size = 1;
1273       return;
1274     default:
1275       abort ();
1276
1277     case 0x01:
1278       *inst_size = 6;
1279       *disp_size = 2;
1280       break;
1281     case 0x06:
1282       *inst_size = 8;
1283       *disp_size = 2;
1284
1285       *buffer++ = 0x26;         /* bne + 8 */
1286       *buffer++ = 0x08;
1287       break;
1288     case 0x07:
1289       *inst_size = 8;
1290       *disp_size = 2;
1291       *buffer++ = 0x27;         /* bne + 8 */
1292       *buffer++ = 0x08;
1293       break;
1294
1295     }
1296   *buffer++ = 0xa8 | rn;        /* addq -1,rn */
1297   *buffer++ = 0x0c;
1298   *buffer++ = 0x04;             /* cmp #0xff:8, rn */
1299   *buffer++ = 0xff;
1300   *buffer++ = 0x70 | rn;
1301   *buffer++ = 0x36;             /* bne ...  */
1302   *buffer++ = 0;
1303   *buffer++ = 0;
1304 }
1305
1306 /* Called after relaxing, change the frags so they know how big they
1307    are.  */
1308
1309 void
1310 md_convert_frag (headers, seg, fragP)
1311      object_headers *headers ATTRIBUTE_UNUSED;
1312      segT seg ATTRIBUTE_UNUSED;
1313      fragS *fragP;
1314 {
1315   int disp_size = 0;
1316   int inst_size = 0;
1317   char *buffer = fragP->fr_fix + fragP->fr_literal;
1318
1319   switch (fragP->fr_subtype)
1320     {
1321     case C (BRANCH, BYTE_DISP):
1322       disp_size = 1;
1323       inst_size = 1;
1324       break;
1325
1326     case C (SCB_F, BYTE_DISP):
1327     case C (SCB_TST, BYTE_DISP):
1328       disp_size = 1;
1329       inst_size = 2;
1330       break;
1331
1332       /* Branches to a known 16 bit displacement.  */
1333
1334       /* Turn on the 16bit bit.  */
1335     case C (BRANCH, WORD_DISP):
1336     case C (SCB_F, WORD_DISP):
1337     case C (SCB_TST, WORD_DISP):
1338       wordify_scb (buffer, &disp_size, &inst_size);
1339       break;
1340
1341     case C (BRANCH, UNDEF_WORD_DISP):
1342     case C (SCB_F, UNDEF_WORD_DISP):
1343     case C (SCB_TST, UNDEF_WORD_DISP):
1344       /* This tried to be relaxed, but didn't manage it, it now needs
1345          a fix.  */
1346       wordify_scb (buffer, &disp_size, &inst_size);
1347
1348       /* Make a reloc */
1349       fix_new (fragP,
1350                fragP->fr_fix + inst_size,
1351                4,
1352                fragP->fr_symbol,
1353                fragP->fr_offset,
1354                0,
1355                R_H8500_PCREL16);
1356
1357       fragP->fr_fix += disp_size + inst_size;
1358       return;
1359       break;
1360     default:
1361       abort ();
1362     }
1363   if (inst_size)
1364     {
1365       /* Get the address of the end of the instruction */
1366       int next_inst = fragP->fr_fix + fragP->fr_address + disp_size + inst_size;
1367       int targ_addr = (S_GET_VALUE (fragP->fr_symbol) +
1368                        fragP->fr_offset);
1369       int disp = targ_addr - next_inst;
1370
1371       md_number_to_chars (buffer + inst_size, disp, disp_size);
1372       fragP->fr_fix += disp_size + inst_size;
1373     }
1374 }
1375
1376 valueT
1377 md_section_align (seg, size)
1378      segT seg ;
1379      valueT size;
1380 {
1381   return ((size + (1 << section_alignment[(int) seg]) - 1)
1382           & (-1 << section_alignment[(int) seg]));
1383
1384 }
1385
1386 void
1387 md_apply_fix3 (fixP, valP, seg)
1388      fixS *fixP;
1389      valueT * valP;
1390      segT seg ATTRIBUTE_UNUSED;
1391 {
1392   long val = * (long *) valP;
1393   char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
1394
1395   if (fixP->fx_r_type == 0)
1396     fixP->fx_r_type = fixP->fx_size == 4 ? R_H8500_IMM32 : R_H8500_IMM16;
1397
1398   switch (fixP->fx_r_type)
1399     {
1400     case R_H8500_IMM8:
1401     case R_H8500_PCREL8:
1402       *buf++ = val;
1403       break;
1404     case R_H8500_IMM16:
1405     case R_H8500_LOW16:
1406     case R_H8500_PCREL16:
1407       *buf++ = (val >> 8);
1408       *buf++ = val;
1409       break;
1410     case R_H8500_HIGH8:
1411       *buf++ = val >> 16;
1412       break;
1413     case R_H8500_HIGH16:
1414       *buf++ = val >> 24;
1415       *buf++ = val >> 16;
1416       break;
1417     case R_H8500_IMM24:
1418       *buf++ = (val >> 16);
1419       *buf++ = (val >> 8);
1420       *buf++ = val;
1421       break;
1422     case R_H8500_IMM32:
1423       *buf++ = (val >> 24);
1424       *buf++ = (val >> 16);
1425       *buf++ = (val >> 8);
1426       *buf++ = val;
1427       break;
1428     default:
1429       abort ();
1430     }
1431
1432   if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0)
1433     fixP->fx_done = 1;
1434 }
1435
1436 /* Called just before address relaxation, return the length
1437    by which a fragment must grow to reach it's destination.  */
1438
1439 int
1440 md_estimate_size_before_relax (fragP, segment_type)
1441      register fragS *fragP;
1442      register segT segment_type;
1443 {
1444   int what;
1445
1446   switch (fragP->fr_subtype)
1447     {
1448     default:
1449       abort ();
1450
1451     case C (BRANCH, UNDEF_BYTE_DISP):
1452     case C (SCB_F, UNDEF_BYTE_DISP):
1453     case C (SCB_TST, UNDEF_BYTE_DISP):
1454       what = GET_WHAT (fragP->fr_subtype);
1455       /* used to be a branch to somewhere which was unknown */
1456       if (S_GET_SEGMENT (fragP->fr_symbol) == segment_type)
1457         {
1458           /* Got a symbol and it's defined in this segment, become byte
1459              sized - maybe it will fix up.  */
1460           fragP->fr_subtype = C (what, BYTE_DISP);
1461         }
1462       else
1463         {
1464           /* Its got a segment, but its not ours, so it will always be
1465              long.  */
1466           fragP->fr_subtype = C (what, UNDEF_WORD_DISP);
1467         }
1468       break;
1469
1470     case C (BRANCH, BYTE_DISP):
1471     case C (BRANCH, WORD_DISP):
1472     case C (BRANCH, UNDEF_WORD_DISP):
1473     case C (SCB_F, BYTE_DISP):
1474     case C (SCB_F, WORD_DISP):
1475     case C (SCB_F, UNDEF_WORD_DISP):
1476     case C (SCB_TST, BYTE_DISP):
1477     case C (SCB_TST, WORD_DISP):
1478     case C (SCB_TST, UNDEF_WORD_DISP):
1479       /* When relaxing a section for the second time, we don't need to
1480          do anything besides return the current size.  */
1481       break;
1482     }
1483
1484   return md_relax_table[fragP->fr_subtype].rlx_length;
1485 }
1486
1487 /* Put number into target byte order.  */
1488
1489 void
1490 md_number_to_chars (ptr, use, nbytes)
1491      char *ptr;
1492      valueT use;
1493      int nbytes;
1494 {
1495   number_to_chars_bigendian (ptr, use, nbytes);
1496 }
1497
1498 long
1499 md_pcrel_from (fixP)
1500      fixS *fixP;
1501 {
1502   return fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address;
1503 }
1504
1505 void
1506 tc_coff_symbol_emit_hook (ignore)
1507      symbolS *ignore ATTRIBUTE_UNUSED;
1508 {
1509 }
1510
1511 short
1512 tc_coff_fix2rtype (fix_ptr)
1513      fixS *fix_ptr;
1514 {
1515   if (fix_ptr->fx_r_type == RELOC_32)
1516     {
1517       /* cons likes to create reloc32's whatever the size of the reloc..
1518      */
1519       switch (fix_ptr->fx_size)
1520         {
1521         case 2:
1522           return R_H8500_IMM16;
1523           break;
1524         case 1:
1525           return R_H8500_IMM8;
1526           break;
1527         default:
1528           abort ();
1529         }
1530     }
1531   return fix_ptr->fx_r_type;
1532 }
1533
1534 void
1535 tc_reloc_mangle (fix_ptr, intr, base)
1536      fixS *fix_ptr;
1537      struct internal_reloc *intr;
1538      bfd_vma base;
1539
1540 {
1541   symbolS *symbol_ptr;
1542
1543   symbol_ptr = fix_ptr->fx_addsy;
1544
1545   /* If this relocation is attached to a symbol then it's ok
1546      to output it */
1547   if (fix_ptr->fx_r_type == RELOC_32)
1548     {
1549       /* cons likes to create reloc32's whatever the size of the reloc..
1550        */
1551       switch (fix_ptr->fx_size)
1552         {
1553         case 2:
1554           intr->r_type = R_IMM16;
1555           break;
1556         case 1:
1557           intr->r_type = R_IMM8;
1558           break;
1559         default:
1560           abort ();
1561         }
1562     }
1563   else
1564     {
1565       intr->r_type = fix_ptr->fx_r_type;
1566     }
1567
1568   intr->r_vaddr = fix_ptr->fx_frag->fr_address + fix_ptr->fx_where + base;
1569   intr->r_offset = fix_ptr->fx_offset;
1570
1571   /* Turn the segment of the symbol into an offset.  */
1572   if (symbol_ptr)
1573     {
1574       symbolS *dot;
1575
1576       dot = segment_info[S_GET_SEGMENT (symbol_ptr)].dot;
1577       if (dot)
1578         {
1579 #if 0
1580           intr->r_offset -=
1581             segment_info[S_GET_SEGMENT (symbol_ptr)].scnhdr.s_paddr;
1582 #endif
1583           intr->r_offset += S_GET_VALUE (symbol_ptr);
1584           intr->r_symndx = dot->sy_number;
1585         }
1586       else
1587         {
1588           intr->r_symndx = symbol_ptr->sy_number;
1589         }
1590
1591     }
1592   else
1593     {
1594       intr->r_symndx = -1;
1595     }
1596
1597 }
1598
1599 int
1600 start_label (ptr)
1601      char *ptr;
1602 {
1603   /* Check for :s.w */
1604   if (ISALPHA (ptr[1]) && ptr[2] == '.')
1605     return 0;
1606   /* Check for :s */
1607   if (ISALPHA (ptr[1]) && !ISALPHA (ptr[2]))
1608     return 0;
1609   return 1;
1610 }
1611
1612 int
1613 tc_coff_sizemachdep (frag)
1614      fragS *frag;
1615 {
1616   return md_relax_table[frag->fr_subtype].rlx_length;
1617 }