gas/config/tc-v850.c

   1 /* tc-v850.c -- Assembler code for the NEC V850
   2
   3    Copyright (C) 1996 Free Software Foundation.
   4
   5    This file is part of GAS, the GNU Assembler.
   6
   7    GAS is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2, or (at your option)
  10    any later version.
  11
  12    GAS is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GAS; see the file COPYING.  If not, write to
  19    the Free Software Foundation, 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #include <stdio.h>
  23 #include <ctype.h>
  24 #include "as.h"
  25 #include "subsegs.h"
  26 #include "opcode/v850.h"
  27 \f
  28 /* Structure to hold information about predefined registers.  */
  29 struct reg_name
  30 {
  31   const char *name;
  32   int value;
  33 };
  34
  35 /* Generic assembler global variables which must be defined by all targets. */
  36
  37 /* Characters which always start a comment. */
  38 const char comment_chars[] = "#";
  39
  40 /* Characters which start a comment at the beginning of a line.  */
  41 const char line_comment_chars[] = ";#";
  42
  43 /* Characters which may be used to separate multiple commands on a
  44    single line.  */
  45 const char line_separator_chars[] = ";";
  46
  47 /* Characters which are used to indicate an exponent in a floating
  48    point number.  */
  49 const char EXP_CHARS[] = "eE";
  50
  51 /* Characters which mean that a number is a floating point constant,
  52    as in 0d1.0.  */
  53 const char FLT_CHARS[] = "dD";
  54 \f
  55
  56 /* local functions */
  57 static unsigned long v850_insert_operand
  58   PARAMS ((unsigned long insn, const struct v850_operand *operand,
  59            offsetT val, char *file, unsigned int line));
  60 static int reg_name_search PARAMS ((const struct reg_name *, int, const char *));
  61 static boolean register_name PARAMS ((expressionS *expressionP));
  62 static boolean system_register_name PARAMS ((expressionS *expressionP));
  63 static boolean cc_name PARAMS ((expressionS *expressionP));
  64 static bfd_reloc_code_real_type v850_reloc_prefix PARAMS ((void));
  65
  66
  67 /* fixups */
  68 #define MAX_INSN_FIXUPS (5)
  69 struct v850_fixup
  70 {
  71   expressionS exp;
  72   int opindex;
  73   bfd_reloc_code_real_type reloc;
  74 };
  75 struct v850_fixup fixups[MAX_INSN_FIXUPS];
  76 static int fc;
  77 \f
  78 const char *md_shortopts = "";
  79 struct option md_longopts[] = {
  80   {NULL, no_argument, NULL, 0}
  81 };
  82 size_t md_longopts_size = sizeof(md_longopts);
  83
  84 /* The target specific pseudo-ops which we support.  */
  85 const pseudo_typeS md_pseudo_table[] =
  86 {
  87   { NULL,       NULL,           0 }
  88 };
  89
  90 /* Opcode hash table.  */
  91 static struct hash_control *v850_hash;
  92
  93 /* This table is sorted. Suitable for searching by a binary search. */
  94 static const struct reg_name pre_defined_registers[] =
  95 {
  96   { "ep", 30 },                 /* ep - element ptr */
  97   { "gp", 4 },                  /* gp - global ptr */
  98   { "lp", 31 },                 /* lp - link ptr */
  99   { "r0", 0 },
 100   { "r1", 1 },
 101   { "r10", 10 },
 102   { "r11", 11 },
 103   { "r12", 12 },
 104   { "r13", 13 },
 105   { "r14", 14 },
 106   { "r15", 15 },
 107   { "r16", 16 },
 108   { "r17", 17 },
 109   { "r18", 18 },
 110   { "r19", 19 },
 111   { "r2", 2 },
 112   { "r20", 20 },
 113   { "r21", 21 },
 114   { "r22", 22 },
 115   { "r23", 23 },
 116   { "r24", 24 },
 117   { "r25", 25 },
 118   { "r26", 26 },
 119   { "r27", 27 },
 120   { "r28", 28 },
 121   { "r29", 29 },
 122   { "r3", 3 },
 123   { "r30", 30 },
 124   { "r31", 31 },
 125   { "r4", 4 },
 126   { "r5", 5 },
 127   { "r6", 6 },
 128   { "r7", 7 },
 129   { "r8", 8 },
 130   { "r9", 9 },
 131   { "sp", 3 },                  /* sp - stack ptr */
 132   { "tp", 5 },                  /* tp - text ptr */
 133   { "zero", 0 },
 134 };
 135 #define REG_NAME_CNT    (sizeof(pre_defined_registers) / sizeof(struct reg_name))
 136
 137
 138 static const struct reg_name system_registers[] =
 139 {
 140   { "eipc", 0 },
 141   { "eipsw", 1 },
 142   { "fepc", 2 },
 143   { "fepsw", 3 },
 144   { "ecr", 4 },
 145   { "psw", 5 },
 146 };
 147 #define SYSREG_NAME_CNT (sizeof(system_registers) / sizeof(struct reg_name))
 148
 149 static const struct reg_name cc_names[] =
 150 {
 151   { "c", 0x1 },
 152   { "ge", 0xe },
 153   { "gt", 0xf },
 154   { "h", 0xb },
 155   { "l", 0x1 },
 156   { "le", 0x7 },
 157   { "lt", 0x6 },
 158   { "n", 0x4 },
 159   { "nc", 0x9 },
 160   { "nh", 0x3 },
 161   { "nl", 0x9 },
 162   { "ns", 0xc },
 163   { "nv", 0x8 },
 164   { "nz", 0xa },
 165   { "p",  0xc },
 166   { "s", 0x4 },
 167   { "sa", 0xd },
 168   { "t", 0x5 },
 169   { "v", 0x0 },
 170   { "z", 0x2 },
 171 };
 172 #define CC_NAME_CNT     (sizeof(cc_names) / sizeof(struct reg_name))
 173
 174 /* reg_name_search does a binary search of the given register table
 175    to see if "name" is a valid regiter name.  Returns the register
 176    number from the array on success, or -1 on failure. */
 177
 178 static int
 179 reg_name_search (regs, regcount, name)
 180      const struct reg_name *regs;
 181      int regcount;
 182      const char *name;
 183 {
 184   int middle, low, high;
 185   int cmp;
 186
 187   low = 0;
 188   high = regcount - 1;
 189
 190   do
 191     {
 192       middle = (low + high) / 2;
 193       cmp = strcasecmp (name, regs[middle].name);
 194       if (cmp < 0)
 195         high = middle - 1;
 196       else if (cmp > 0)
 197         low = middle + 1;
 198       else
 199           return regs[middle].value;
 200     }
 201   while (low <= high);
 202   return -1;
 203 }
 204
 205
 206 /* Summary of register_name().
 207  *
 208  * in: Input_line_pointer points to 1st char of operand.
 209  *
 210  * out: A expressionS.
 211  *      The operand may have been a register: in this case, X_op == O_register,
 212  *      X_add_number is set to the register number, and truth is returned.
 213  *      Input_line_pointer->(next non-blank) char after operand, or is in
 214  *      its original state.
 215  */
 216 static boolean
 217 register_name (expressionP)
 218      expressionS *expressionP;
 219 {
 220   int reg_number;
 221   char *name;
 222   char *start;
 223   char c;
 224
 225   /* Find the spelling of the operand */
 226   start = name = input_line_pointer;
 227
 228   c = get_symbol_end ();
 229   reg_number = reg_name_search (pre_defined_registers, REG_NAME_CNT, name);
 230
 231   /* look to see if it's in the register table */
 232   if (reg_number >= 0)
 233     {
 234       expressionP->X_op = O_register;
 235       expressionP->X_add_number = reg_number;
 236
 237       /* make the rest nice */
 238       expressionP->X_add_symbol = NULL;
 239       expressionP->X_op_symbol = NULL;
 240       *input_line_pointer = c;  /* put back the delimiting char */
 241       return true;
 242     }
 243   else
 244     {
 245       /* reset the line as if we had not done anything */
 246       *input_line_pointer = c;   /* put back the delimiting char */
 247       input_line_pointer = start; /* reset input_line pointer */
 248       return false;
 249     }
 250 }
 251
 252 /* Summary of system_register_name().
 253  *
 254  * in: Input_line_pointer points to 1st char of operand.
 255  *
 256  * out: A expressionS.
 257  *      The operand may have been a register: in this case, X_op == O_register,
 258  *      X_add_number is set to the register number, and truth is returned.
 259  *      Input_line_pointer->(next non-blank) char after operand, or is in
 260  *      its original state.
 261  */
 262 static boolean
 263 system_register_name (expressionP)
 264      expressionS *expressionP;
 265 {
 266   int reg_number;
 267   char *name;
 268   char *start;
 269   char c;
 270
 271   /* Find the spelling of the operand */
 272   start = name = input_line_pointer;
 273
 274   c = get_symbol_end ();
 275   reg_number = reg_name_search (system_registers, SYSREG_NAME_CNT, name);
 276
 277   /* look to see if it's in the register table */
 278   if (reg_number >= 0)
 279     {
 280       expressionP->X_op = O_register;
 281       expressionP->X_add_number = reg_number;
 282
 283       /* make the rest nice */
 284       expressionP->X_add_symbol = NULL;
 285       expressionP->X_op_symbol = NULL;
 286       *input_line_pointer = c;  /* put back the delimiting char */
 287       return true;
 288     }
 289   else
 290     {
 291       /* reset the line as if we had not done anything */
 292       *input_line_pointer = c;   /* put back the delimiting char */
 293       input_line_pointer = start; /* reset input_line pointer */
 294       return false;
 295     }
 296 }
 297
 298 /* Summary of cc_name().
 299  *
 300  * in: Input_line_pointer points to 1st char of operand.
 301  *
 302  * out: A expressionS.
 303  *      The operand may have been a register: in this case, X_op == O_register,
 304  *      X_add_number is set to the register number, and truth is returned.
 305  *      Input_line_pointer->(next non-blank) char after operand, or is in
 306  *      its original state.
 307  */
 308 static boolean
 309 cc_name (expressionP)
 310      expressionS *expressionP;
 311 {
 312   int reg_number;
 313   char *name;
 314   char *start;
 315   char c;
 316
 317   /* Find the spelling of the operand */
 318   start = name = input_line_pointer;
 319
 320   c = get_symbol_end ();
 321   reg_number = reg_name_search (cc_names, CC_NAME_CNT, name);
 322
 323   /* look to see if it's in the register table */
 324   if (reg_number >= 0)
 325     {
 326       expressionP->X_op = O_constant;
 327       expressionP->X_add_number = reg_number;
 328
 329       /* make the rest nice */
 330       expressionP->X_add_symbol = NULL;
 331       expressionP->X_op_symbol = NULL;
 332       *input_line_pointer = c;  /* put back the delimiting char */
 333       return true;
 334     }
 335   else
 336     {
 337       /* reset the line as if we had not done anything */
 338       *input_line_pointer = c;   /* put back the delimiting char */
 339       input_line_pointer = start; /* reset input_line pointer */
 340       return false;
 341     }
 342 }
 343
 344 void
 345 md_show_usage (stream)
 346   FILE *stream;
 347 {
 348   fprintf(stream, "V850 options:\n\
 349 none yet\n");
 350 }
 351
 352 int
 353 md_parse_option (c, arg)
 354      int c;
 355      char *arg;
 356 {
 357   return 0;
 358 }
 359
 360 symbolS *
 361 md_undefined_symbol (name)
 362   char *name;
 363 {
 364   return 0;
 365 }
 366
 367 char *
 368 md_atof (type, litp, sizep)
 369   int type;
 370   char *litp;
 371   int *sizep;
 372 {
 373   int prec;
 374   LITTLENUM_TYPE words[4];
 375   char *t;
 376   int i;
 377
 378   switch (type)
 379     {
 380     case 'f':
 381       prec = 2;
 382       break;
 383
 384     case 'd':
 385       prec = 4;
 386       break;
 387
 388     default:
 389       *sizep = 0;
 390       return "bad call to md_atof";
 391     }
 392
 393   t = atof_ieee (input_line_pointer, type, words);
 394   if (t)
 395     input_line_pointer = t;
 396
 397   *sizep = prec * 2;
 398
 399   for (i = prec - 1; i >= 0; i--)
 400     {
 401       md_number_to_chars (litp, (valueT) words[i], 2);
 402       litp += 2;
 403     }
 404
 405   return NULL;
 406 }
 407
 408
 409 void
 410 md_convert_frag (abfd, sec, fragP)
 411   bfd *abfd;
 412   asection *sec;
 413   fragS *fragP;
 414 {
 415   /* printf ("call to md_convert_frag \n"); */
 416   abort ();
 417 }
 418
 419 valueT
 420 md_section_align (seg, addr)
 421      asection *seg;
 422      valueT addr;
 423 {
 424   int align = bfd_get_section_alignment (stdoutput, seg);
 425   return ((addr + (1 << align) - 1) & (-1 << align));
 426 }
 427
 428 void
 429 md_begin ()
 430 {
 431   char *prev_name = "";
 432   register const struct v850_opcode *op;
 433
 434   v850_hash = hash_new();
 435
 436   /* Insert unique names into hash table.  The V850 instruction set
 437      has many identical opcode names that have different opcodes based
 438      on the operands.  This hash table then provides a quick index to
 439      the first opcode with a particular name in the opcode table.  */
 440
 441   op     = v850_opcodes;
 442   while (op->name)
 443     {
 444       if (strcmp (prev_name, op->name))
 445         {
 446           prev_name = (char *) op->name;
 447           hash_insert (v850_hash, op->name, (char *) op);
 448         }
 449       op++;
 450     }
 451 }
 452
 453 static bfd_reloc_code_real_type
 454 v850_reloc_prefix()
 455 {
 456   if (strncmp(input_line_pointer, "hi0(", 4) == 0)
 457     {
 458       input_line_pointer += 4;
 459       return BFD_RELOC_HI16;
 460     }
 461   if (strncmp(input_line_pointer, "hi(", 3) == 0)
 462     {
 463       input_line_pointer += 3;
 464       return BFD_RELOC_HI16_S;
 465     }
 466   if (strncmp (input_line_pointer, "lo(", 3) == 0)
 467     {
 468       input_line_pointer += 3;
 469       return BFD_RELOC_LO16;
 470     }
 471
 472   if (strncmp (input_line_pointer, "sdaoff(", 7) == 0)
 473     {
 474       input_line_pointer += 7;
 475       return BFD_RELOC_V850_SDA_OFFSET;
 476     }
 477
 478   if (strncmp (input_line_pointer, "zdaoff(", 7) == 0)
 479     {
 480       input_line_pointer += 7;
 481       return BFD_RELOC_V850_ZDA_OFFSET;
 482     }
 483
 484   if (strncmp (input_line_pointer, "tdaoff(", 7) == 0)
 485     {
 486       input_line_pointer += 7;
 487       return BFD_RELOC_V850_TDA_OFFSET;
 488     }
 489
 490   /* FIXME: implement sda, tda, zda here */
 491
 492   return BFD_RELOC_UNUSED;
 493 }
 494
 495 void
 496 md_assemble (str)
 497      char *str;
 498 {
 499   char *s;
 500   struct v850_opcode *opcode;
 501   struct v850_opcode *next_opcode;
 502   const unsigned char *opindex_ptr;
 503   int next_opindex;
 504   unsigned long insn, insn_size;
 505   char *f;
 506   int i;
 507   int match;
 508   bfd_reloc_code_real_type reloc;
 509
 510   /* Get the opcode.  */
 511   for (s = str; *s != '\0' && ! isspace (*s); s++)
 512     ;
 513   if (*s != '\0')
 514     *s++ = '\0';
 515
 516   /* find the first opcode with the proper name */
 517   opcode = (struct v850_opcode *)hash_find (v850_hash, str);
 518   if (opcode == NULL)
 519     {
 520       as_bad ("Unrecognized opcode: `%s'", str);
 521       return;
 522     }
 523
 524   str = s;
 525   while (isspace (*str))
 526     ++str;
 527
 528   input_line_pointer = str;
 529
 530   for(;;)
 531     {
 532       const char *errmsg = NULL;
 533
 534       fc = 0;
 535       match = 0;
 536       next_opindex = 0;
 537       insn = opcode->opcode;
 538       for (opindex_ptr = opcode->operands; *opindex_ptr != 0; opindex_ptr++)
 539         {
 540           const struct v850_operand *operand;
 541           char *hold;
 542           expressionS ex;
 543
 544           if (next_opindex == 0)
 545             {
 546               operand = &v850_operands[*opindex_ptr];
 547             }
 548           else
 549             {
 550               operand = &v850_operands[next_opindex];
 551               next_opindex = 0;
 552             }
 553
 554           errmsg = NULL;
 555
 556           while (*str == ' ' || *str == ',' || *str == '[' || *str == ']')
 557             ++str;
 558
 559           /* Gather the operand. */
 560           hold = input_line_pointer;
 561           input_line_pointer = str;
 562
 563
 564           /* lo(), hi(), hi0(), etc... */
 565           if ((reloc = v850_reloc_prefix()) != BFD_RELOC_UNUSED)
 566             {
 567               expression(&ex);
 568
 569               if (*input_line_pointer++ != ')')
 570                 {
 571                   errmsg = "syntax error: expected `)'";
 572                   goto error;
 573                 }
 574
 575               if (ex.X_op == O_constant)
 576                 {
 577                   switch (reloc)
 578                     {
 579                     case BFD_RELOC_LO16:
 580                       ex.X_add_number &= 0xffff;
 581                       break;
 582
 583                     case BFD_RELOC_HI16:
 584                       ex.X_add_number = ((ex.X_add_number >> 16) & 0xffff);
 585                       break;
 586
 587                     case BFD_RELOC_HI16_S:
 588                       ex.X_add_number = ((ex.X_add_number >> 16) & 0xffff)
 589                         + ((ex.X_add_number >> 15) & 1);
 590                       break;
 591
 592                     default:
 593                       break;
 594                     }
 595
 596                   insn = v850_insert_operand (insn, operand, ex.X_add_number,
 597                                               (char *) NULL, 0);
 598                 }
 599               else
 600                 {
 601                   if (fc > MAX_INSN_FIXUPS)
 602                     as_fatal ("too many fixups");
 603
 604                   fixups[fc].exp = ex;
 605                   fixups[fc].opindex = *opindex_ptr;
 606                   fixups[fc].reloc = reloc;
 607                   fc++;
 608                 }
 609             }
 610           else
 611             {
 612           if ((operand->flags & V850_OPERAND_REG) != 0)
 613             {
 614               if (!register_name(&ex))
 615                 {
 616                   errmsg = "invalid register name";
 617                   goto error;
 618                 }
 619             }
 620           else if ((operand->flags & V850_OPERAND_SRG) != 0)
 621             {
 622               if (!system_register_name(&ex))
 623                 {
 624                   errmsg = "invalid system register name";
 625                   goto error;
 626                 }
 627             }
 628           else if ((operand->flags & V850_OPERAND_EP) != 0)
 629             {
 630               char *start = input_line_pointer;
 631               char c = get_symbol_end ();
 632               if (strcmp (start, "ep") != 0 && strcmp (start, "r30") != 0)
 633                 {
 634                   /* Put things back the way we found them.  */
 635                   *input_line_pointer = c;
 636                   input_line_pointer = start;
 637                   errmsg = "expected EP register";
 638                   goto error;
 639                 }
 640               *input_line_pointer = c;
 641               str = input_line_pointer;
 642               input_line_pointer = hold;
 643
 644               while (*str == ' ' || *str == ',' || *str == '[' || *str == ']')
 645                 ++str;
 646               continue;
 647             }
 648           else if ((operand->flags & V850_OPERAND_CC) != 0)
 649             {
 650               if (!cc_name(&ex))
 651                 {
 652                   errmsg = "invalid condition code name";
 653                   goto error;
 654                 }
 655             }
 656           else if (register_name (&ex)
 657                    && (operand->flags & V850_OPERAND_REG) == 0)
 658             {
 659               errmsg = "syntax error: register not expected";
 660               goto error;
 661             }
 662           else if (system_register_name (&ex)
 663                    && (operand->flags & V850_OPERAND_SRG) == 0)
 664             {
 665               errmsg = "syntax error: system register not expected";
 666               goto error;
 667             }
 668           else if (cc_name (&ex)
 669                    && (operand->flags & V850_OPERAND_CC) == 0)
 670             {
 671               errmsg = "syntax error: condition code not expected";
 672               goto error;
 673             }
 674           else
 675             {
 676               expression(&ex);
 677             }
 678
 679           switch (ex.X_op)
 680             {
 681             case O_illegal:
 682               errmsg = "illegal operand";
 683               goto error;
 684             case O_absent:
 685               errmsg = "missing operand";
 686               goto error;
 687             case O_register:
 688               if ((operand->flags & (V850_OPERAND_REG | V850_OPERAND_SRG)) == 0)
 689                 {
 690                   errmsg = "invalid operand";
 691                   goto error;
 692                 }
 693
 694               insn = v850_insert_operand (insn, operand, ex.X_add_number,
 695                                           (char *) NULL, 0);
 696               break;
 697
 698             case O_constant:
 699               insn = v850_insert_operand (insn, operand, ex.X_add_number,
 700                                           (char *) NULL, 0);
 701               break;
 702
 703             default:
 704               /* We need to generate a fixup for this expression.  */
 705               if (fc >= MAX_INSN_FIXUPS)
 706                 as_fatal ("too many fixups");
 707               fixups[fc].exp = ex;
 708               fixups[fc].opindex = *opindex_ptr;
 709               fixups[fc].reloc = BFD_RELOC_UNUSED;
 710               ++fc;
 711               break;
 712             }
 713
 714             }
 715
 716           str = input_line_pointer;
 717           input_line_pointer = hold;
 718
 719           while (*str == ' ' || *str == ',' || *str == '[' || *str == ']')
 720             ++str;
 721         }
 722       match = 1;
 723
 724     error:
 725       if (match == 0)
 726         {
 727           next_opcode = opcode + 1;
 728           if (next_opcode->opcode != 0 && !strcmp(next_opcode->name, opcode->name))
 729             {
 730               opcode = next_opcode;
 731               continue;
 732             }
 733
 734           as_bad ("%s", errmsg);
 735           return;
 736         }
 737       break;
 738     }
 739
 740   while (isspace (*str))
 741     ++str;
 742
 743   if (*str != '\0')
 744     as_bad ("junk at end of line: `%s'", str);
 745
 746   input_line_pointer = str;
 747
 748   /* Write out the instruction.
 749
 750      Four byte insns have an opcode with the two high bits on.  */
 751   if ((insn & 0x0600) == 0x0600)
 752     insn_size = 4;
 753   else
 754     insn_size = 2;
 755   f = frag_more (insn_size);
 756   md_number_to_chars (f, insn, insn_size);
 757
 758   /* Create any fixups.  At this point we do not use a
 759      bfd_reloc_code_real_type, but instead just use the
 760      BFD_RELOC_UNUSED plus the operand index.  This lets us easily
 761      handle fixups for any operand type, although that is admittedly
 762      not a very exciting feature.  We pick a BFD reloc type in
 763      md_apply_fix.  */
 764   for (i = 0; i < fc; i++)
 765     {
 766       const struct v850_operand *operand;
 767
 768       operand = &v850_operands[fixups[i].opindex];
 769       if (fixups[i].reloc != BFD_RELOC_UNUSED)
 770         {
 771           reloc_howto_type *reloc_howto = bfd_reloc_type_lookup (stdoutput, fixups[i].reloc);
 772           int size;
 773           int offset;
 774           fixS *fixP;
 775
 776           if (!reloc_howto)
 777             abort();
 778
 779           size = bfd_get_reloc_size (reloc_howto);
 780
 781           /* The "size" of a TDA_OFFSET reloc varies depending
 782              on what kind of instruction it's used in!  */
 783           if (reloc_howto->type == 11 && insn_size > 2)
 784             size = 2;
 785
 786           if (size < 1 || size > 4)
 787             abort();
 788
 789           offset = 4 - size;
 790           fixP = fix_new_exp (frag_now, f - frag_now->fr_literal + offset, size,
 791                               &fixups[i].exp,
 792                               reloc_howto->pc_relative,
 793                               fixups[i].reloc);
 794         }
 795       else
 796         {
 797           fix_new_exp (frag_now, f - frag_now->fr_literal, 4,
 798                        &fixups[i].exp,
 799                        1 /* FIXME: V850_OPERAND_RELATIVE ??? */,
 800                        ((bfd_reloc_code_real_type)
 801                         (fixups[i].opindex + (int) BFD_RELOC_UNUSED)));
 802         }
 803     }
 804 }
 805
 806
 807 /* if while processing a fixup, a reloc really needs to be created */
 808 /* then it is done here */
 809
 810 arelent *
 811 tc_gen_reloc (seg, fixp)
 812      asection *seg;
 813      fixS *fixp;
 814 {
 815   arelent *reloc;
 816   reloc = (arelent *) bfd_alloc_by_size_t (stdoutput, sizeof (arelent));
 817   reloc->sym_ptr_ptr = &fixp->fx_addsy->bsym;
 818   reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
 819   reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
 820   if (reloc->howto == (reloc_howto_type *) NULL)
 821     {
 822       as_bad_where (fixp->fx_file, fixp->fx_line,
 823                     "reloc %d not supported by object file format", (int)fixp->fx_r_type);
 824       return NULL;
 825     }
 826   reloc->addend = fixp->fx_addnumber;
 827   /*  printf("tc_gen_reloc: addr=%x  addend=%x\n", reloc->address, reloc->addend); */
 828   return reloc;
 829 }
 830
 831 int
 832 md_estimate_size_before_relax (fragp, seg)
 833      fragS *fragp;
 834      asection *seg;
 835 {
 836   return 0;
 837 }
 838
 839 long
 840 md_pcrel_from (fixp)
 841      fixS *fixp;
 842 {
 843   /* If the symbol is undefined, or in a section other than our own,
 844      then let the linker figure it out.  */
 845   if (fixp->fx_addsy != (symbolS *) NULL && ! S_IS_DEFINED (fixp->fx_addsy))
 846     {
 847       /* The symbol is undefined.  Let the linker figure it out.  */
 848       return 0;
 849     }
 850   return fixp->fx_frag->fr_address + fixp->fx_where;
 851 }
 852
 853 int
 854 md_apply_fix3 (fixp, valuep, seg)
 855      fixS *fixp;
 856      valueT *valuep;
 857      segT seg;
 858 {
 859   valueT value;
 860   char *where;
 861
 862   if (fixp->fx_addsy == (symbolS *) NULL)
 863     {
 864       value = *valuep;
 865       fixp->fx_done = 1;
 866     }
 867   else if (fixp->fx_pcrel)
 868     value = *valuep;
 869   else
 870     {
 871       value = fixp->fx_offset;
 872       if (fixp->fx_subsy != (symbolS *) NULL)
 873         {
 874           if (S_GET_SEGMENT (fixp->fx_subsy) == absolute_section)
 875             value -= S_GET_VALUE (fixp->fx_subsy);
 876           else
 877             {
 878               /* We don't actually support subtracting a symbol.  */
 879               as_bad_where (fixp->fx_file, fixp->fx_line,
 880                             "expression too complex");
 881             }
 882         }
 883     }
 884
 885   /* printf("md_apply_fix: value=0x%x  type=%d\n",  value, fixp->fx_r_type); */
 886
 887   if ((int) fixp->fx_r_type >= (int) BFD_RELOC_UNUSED)
 888     {
 889       int opindex;
 890       const struct v850_operand *operand;
 891       char *where;
 892       unsigned long insn;
 893
 894       opindex = (int) fixp->fx_r_type - (int) BFD_RELOC_UNUSED;
 895       operand = &v850_operands[opindex];
 896
 897       /* Fetch the instruction, insert the fully resolved operand
 898          value, and stuff the instruction back again.
 899
 900          Note the instruction has been stored in little endian
 901          format!  */
 902       where = fixp->fx_frag->fr_literal + fixp->fx_where;
 903
 904       insn = bfd_getl32((unsigned char *) where);
 905       insn = v850_insert_operand (insn, operand, (offsetT) value,
 906                                   fixp->fx_file, fixp->fx_line);
 907       bfd_putl32((bfd_vma) insn, (unsigned char *) where);
 908
 909       if (fixp->fx_done)
 910         {
 911           /* Nothing else to do here. */
 912           return 1;
 913         }
 914
 915       /* Determine a BFD reloc value based on the operand information.
 916          We are only prepared to turn a few of the operands into relocs. */
 917
 918       if (operand->bits == 22)
 919         fixp->fx_r_type = BFD_RELOC_V850_22_PCREL;
 920       else if (operand->bits == 9)
 921         fixp->fx_r_type = BFD_RELOC_V850_9_PCREL;
 922       else
 923         {
 924           as_bad_where(fixp->fx_file, fixp->fx_line,
 925                        "unresolved expression that must be resolved");
 926           fixp->fx_done = 1;
 927           return 1;
 928         }
 929     }
 930   else if (fixp->fx_done)
 931     {
 932       /* We still have to insert the value into memory!  */
 933       where = fixp->fx_frag->fr_literal + fixp->fx_where;
 934       if (fixp->fx_size == 1)
 935         *where = value & 0xff;
 936       if (fixp->fx_size == 2)
 937         bfd_putl16(value & 0xffff, (unsigned char *) where);
 938       if (fixp->fx_size == 4)
 939         bfd_putl32(value, (unsigned char *) where);
 940     }
 941
 942   fixp->fx_addnumber = value;
 943   return 1;
 944 }
 945
 946 \f
 947 /* Insert an operand value into an instruction.  */
 948
 949 static unsigned long
 950 v850_insert_operand (insn, operand, val, file, line)
 951      unsigned long insn;
 952      const struct v850_operand *operand;
 953      offsetT val;
 954      char *file;
 955      unsigned int line;
 956 {
 957   if (operand->bits != 16)
 958     {
 959       long min, max;
 960       offsetT test;
 961
 962       if ((operand->flags & V850_OPERAND_SIGNED) != 0)
 963         {
 964             max = (1 << (operand->bits - 1)) - 1;
 965           min = - (1 << (operand->bits - 1));
 966         }
 967       else
 968         {
 969           max = (1 << operand->bits) - 1;
 970           min = 0;
 971         }
 972
 973       test = val;
 974
 975
 976       if (test < (offsetT) min || test > (offsetT) max)
 977         {
 978           const char *err =
 979             "operand out of range (%s not between %ld and %ld)";
 980           char buf[100];
 981
 982           sprint_value (buf, test);
 983           if (file == (char *) NULL)
 984             as_warn (err, buf, min, max);
 985           else
 986             as_warn_where (file, line, err, buf, min, max);
 987         }
 988     }
 989
 990   if (operand->insert)
 991     {
 992       const char *message = NULL;
 993       insn = (*operand->insert) (insn, val, &message);
 994       if (message != NULL)
 995         {
 996           if (file == (char *) NULL)
 997             as_warn (message);
 998           else
 999             as_warn_where (file, line, message);
1000         }
1001     }
1002   else
1003     insn |= (((long) val & ((1 << operand->bits) - 1)) << operand->shift);
1004   return insn;
1005 }