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 /* local functions */
  56 static unsigned long v850_insert_operand
  57   PARAMS ((unsigned long insn, const struct v850_operand *operand,
  58            offsetT val, char *file, unsigned int line));
  59 static int reg_name_search PARAMS ((char *name, const struct reg_name *, int));
  60 static boolean register_name PARAMS ((expressionS *expressionP));
  61 static boolean system_register_name PARAMS ((expressionS *expressionP));
  62 static boolean cc_name PARAMS ((expressionS *expressionP));
  63 static int postfix PARAMS ((char *p));
  64 static bfd_reloc_code_real_type get_reloc PARAMS ((struct v850_operand *op));
  65 static unsigned long build_insn PARAMS ((struct v850_opcode *opcode, expressionS *opers));
  66
  67
  68 /* fixups */
  69 #define MAX_INSN_FIXUPS (5)
  70 struct v850_fixup
  71 {
  72   expressionS exp;
  73   int opindex;
  74   bfd_reloc_code_real_type reloc;
  75 };
  76 struct v850_fixup fixups[MAX_INSN_FIXUPS];
  77 static int fc;
  78 \f
  79 const char *md_shortopts = "";
  80 struct option md_longopts[] = {
  81   {NULL, no_argument, NULL, 0}
  82 };
  83 size_t md_longopts_size = sizeof(md_longopts);
  84
  85 /* The target specific pseudo-ops which we support.  */
  86 const pseudo_typeS md_pseudo_table[] =
  87 {
  88   /*
  89   { "byte",     ppc_byte,       0 },
  90   { "long",     ppc_elf_cons,   4 },
  91   { "word",     ppc_elf_cons,   2 },
  92   { "short",    ppc_elf_cons,   2 },
  93   { "rdata",    ppc_elf_rdata,  0 },
  94   { "rodata",   ppc_elf_rdata,  0 },
  95   { "lcomm",    ppc_elf_lcomm,  0 },
  96   */
  97   { NULL,       NULL,           0 }
  98 };
  99
 100 /* Opcode hash table.  */
 101 static struct hash_control *v850_hash;
 102
 103 /* This table is sorted. Suitable for searching by a binary search. */
 104 static const struct reg_name pre_defined_registers[] =
 105 {
 106   { "ep", 30 },                 /* ep - element ptr */
 107   { "gp", 4 },                  /* gp - global ptr */
 108   { "lp", 31 },                 /* lp - link ptr */
 109   { "r0", 0 },
 110   { "r1", 1 },
 111   { "r10", 10 },
 112   { "r11", 11 },
 113   { "r12", 12 },
 114   { "r13", 13 },
 115   { "r14", 14 },
 116   { "r15", 15 },
 117   { "r16", 16 },
 118   { "r17", 17 },
 119   { "r18", 18 },
 120   { "r19", 19 },
 121   { "r2", 2 },
 122   { "r20", 20 },
 123   { "r21", 21 },
 124   { "r22", 22 },
 125   { "r23", 23 },
 126   { "r24", 24 },
 127   { "r25", 25 },
 128   { "r26", 26 },
 129   { "r27", 27 },
 130   { "r28", 28 },
 131   { "r29", 29 },
 132   { "r3", 3 },
 133   { "r30", 30 },
 134   { "r31", 31 },
 135   { "r4", 4 },
 136   { "r5", 5 },
 137   { "r6", 6 },
 138   { "r7", 7 },
 139   { "r8", 8 },
 140   { "r9", 9 },
 141   { "sp", 3 },                  /* sp - stack ptr */
 142   { "tp", 5 },                  /* tp - text ptr */
 143   { "zero", 0 },
 144 };
 145 #define REG_NAME_CNT    (sizeof(pre_defined_registers) / sizeof(struct reg_name))
 146
 147
 148 static const struct reg_name system_registers[] =
 149 {
 150   { "eipc", 0 },
 151   { "eipsw", 1 },
 152   { "fepc", 2 },
 153   { "fepsw", 3 },
 154   { "ecr", 4 },
 155   { "psw", 5 },
 156 };
 157 #define SYSREG_NAME_CNT (sizeof(system_registers) / sizeof(struct reg_name))
 158
 159 static const struct reg_name cc_names[] =
 160 {
 161   { "c", 0x1 },
 162   { "ge", 0xe },
 163   { "gt", 0xf },
 164   { "h", 0xb },
 165   { "l", 0x1 },
 166   { "le", 0x7 },
 167   { "lt", 0x6 },
 168   { "n", 0x4 },
 169   { "nc", 0x9 },
 170   { "nh", 0x3 },
 171   { "nl", 0x9 },
 172   { "ns", 0xc },
 173   { "nv", 0x8 },
 174   { "nz", 0xa },
 175   { "p",  0xc },
 176   { "s", 0x4 },
 177   { "sa", 0xd },
 178   { "t", 0x5 },
 179   { "v", 0x0 },
 180   { "z", 0x2 },
 181 };
 182 #define CC_NAME_CNT     (sizeof(cc_names) / sizeof(struct reg_name))
 183
 184 /* reg_name_search does a binary search of the given register table
 185    to see if "name" is a valid regiter name.  Returns the register
 186    number from the array on success, or -1 on failure. */
 187
 188 static int
 189 reg_name_search (name, table, high)
 190      char *name;
 191      const struct reg_name *table;
 192      int high;
 193 {
 194   int middle, low;
 195   int cmp;
 196
 197   low = 0;
 198   do
 199     {
 200       middle = (low + high) / 2;
 201       cmp = strcasecmp (name, table[middle].name);
 202       if (cmp < 0)
 203         high = middle - 1;
 204       else if (cmp > 0)
 205         low = middle + 1;
 206       else
 207           return table[middle].value;
 208     }
 209   while (low <= high);
 210   return -1;
 211 }
 212
 213
 214 /* Summary of register_name().
 215  *
 216  * in: Input_line_pointer points to 1st char of operand.
 217  *
 218  * out: A expressionS.
 219  *      The operand may have been a register: in this case, X_op == O_register,
 220  *      X_add_number is set to the register number, and truth is returned.
 221  *      Input_line_pointer->(next non-blank) char after operand, or is in
 222  *      its original state.
 223  */
 224 static boolean
 225 register_name (expressionP)
 226      expressionS *expressionP;
 227 {
 228   int reg_number;
 229   char *name;
 230   char *start;
 231   char c;
 232
 233   /* Find the spelling of the operand */
 234   start = name = input_line_pointer;
 235
 236   c = get_symbol_end ();
 237   reg_number = reg_name_search (name, pre_defined_registers, REG_NAME_CNT - 1);
 238
 239   /* look to see if it's in the register table */
 240   if (reg_number >= 0)
 241     {
 242       expressionP->X_op = O_register;
 243       expressionP->X_add_number = reg_number;
 244
 245       /* make the rest nice */
 246       expressionP->X_add_symbol = NULL;
 247       expressionP->X_op_symbol = NULL;
 248       *input_line_pointer = c;  /* put back the delimiting char */
 249       return true;
 250     }
 251   else
 252     {
 253       /* reset the line as if we had not done anything */
 254       *input_line_pointer = c;   /* put back the delimiting char */
 255       input_line_pointer = start; /* reset input_line pointer */
 256       return false;
 257     }
 258 }
 259
 260 /* Summary of system_register_name().
 261  *
 262  * in: Input_line_pointer points to 1st char of operand.
 263  *
 264  * out: A expressionS.
 265  *      The operand may have been a register: in this case, X_op == O_register,
 266  *      X_add_number is set to the register number, and truth is returned.
 267  *      Input_line_pointer->(next non-blank) char after operand, or is in
 268  *      its original state.
 269  */
 270 static boolean
 271 system_register_name (expressionP)
 272      expressionS *expressionP;
 273 {
 274   int reg_number;
 275   char *name;
 276   char *start;
 277   char c;
 278
 279   /* Find the spelling of the operand */
 280   start = name = input_line_pointer;
 281
 282   c = get_symbol_end ();
 283   reg_number = reg_name_search (name, system_registers, SYSREG_NAME_CNT - 1);
 284
 285   /* look to see if it's in the register table */
 286   if (reg_number >= 0)
 287     {
 288       expressionP->X_op = O_register;
 289       expressionP->X_add_number = reg_number;
 290
 291       /* make the rest nice */
 292       expressionP->X_add_symbol = NULL;
 293       expressionP->X_op_symbol = NULL;
 294       *input_line_pointer = c;  /* put back the delimiting char */
 295       return true;
 296     }
 297   else
 298     {
 299       /* reset the line as if we had not done anything */
 300       *input_line_pointer = c;   /* put back the delimiting char */
 301       input_line_pointer = start; /* reset input_line pointer */
 302       return false;
 303     }
 304 }
 305
 306 /* Summary of cc_name().
 307  *
 308  * in: Input_line_pointer points to 1st char of operand.
 309  *
 310  * out: A expressionS.
 311  *      The operand may have been a register: in this case, X_op == O_register,
 312  *      X_add_number is set to the register number, and truth is returned.
 313  *      Input_line_pointer->(next non-blank) char after operand, or is in
 314  *      its original state.
 315  */
 316 static boolean
 317 cc_name (expressionP)
 318      expressionS *expressionP;
 319 {
 320   int reg_number;
 321   char *name;
 322   char *start;
 323   char c;
 324
 325   /* Find the spelling of the operand */
 326   start = name = input_line_pointer;
 327
 328   c = get_symbol_end ();
 329   reg_number = reg_name_search (name, cc_names, CC_NAME_CNT - 1);
 330
 331   /* look to see if it's in the register table */
 332   if (reg_number >= 0)
 333     {
 334       expressionP->X_op = O_constant;
 335       expressionP->X_add_number = reg_number;
 336
 337       /* make the rest nice */
 338       expressionP->X_add_symbol = NULL;
 339       expressionP->X_op_symbol = NULL;
 340       *input_line_pointer = c;  /* put back the delimiting char */
 341       return true;
 342     }
 343   else
 344     {
 345       /* reset the line as if we had not done anything */
 346       *input_line_pointer = c;   /* put back the delimiting char */
 347       input_line_pointer = start; /* reset input_line pointer */
 348       return false;
 349     }
 350 }
 351
 352 void
 353 md_show_usage (stream)
 354   FILE *stream;
 355 {
 356   fprintf(stream, "V850 options:\n\
 357 none yet\n");
 358 }
 359
 360 int
 361 md_parse_option (c, arg)
 362      int c;
 363      char *arg;
 364 {
 365   return 0;
 366 }
 367
 368 symbolS *
 369 md_undefined_symbol (name)
 370   char *name;
 371 {
 372   return 0;
 373 }
 374
 375 char *
 376 md_atof (type, litp, sizep)
 377   int type;
 378   char *litp;
 379   int *sizep;
 380 {
 381   int prec;
 382   LITTLENUM_TYPE words[4];
 383   char *t;
 384   int i;
 385
 386   switch (type)
 387     {
 388     case 'f':
 389       prec = 2;
 390       break;
 391
 392     case 'd':
 393       prec = 4;
 394       break;
 395
 396     default:
 397       *sizep = 0;
 398       return "bad call to md_atof";
 399     }
 400
 401   t = atof_ieee (input_line_pointer, type, words);
 402   if (t)
 403     input_line_pointer = t;
 404
 405   *sizep = prec * 2;
 406
 407   for (i = prec - 1; i >= 0; i--)
 408     {
 409       md_number_to_chars (litp, (valueT) words[i], 2);
 410       litp += 2;
 411     }
 412
 413   return NULL;
 414 }
 415
 416
 417 void
 418 md_convert_frag (abfd, sec, fragP)
 419   bfd *abfd;
 420   asection *sec;
 421   fragS *fragP;
 422 {
 423   /* printf ("call to md_convert_frag \n"); */
 424   abort ();
 425 }
 426
 427 valueT
 428 md_section_align (seg, addr)
 429      asection *seg;
 430      valueT addr;
 431 {
 432   int align = bfd_get_section_alignment (stdoutput, seg);
 433   return ((addr + (1 << align) - 1) & (-1 << align));
 434 }
 435
 436 void
 437 md_begin ()
 438 {
 439   char *prev_name = "";
 440   register const struct v850_opcode *op;
 441   const struct v850_opcode *op_end;
 442
 443   v850_hash = hash_new();
 444
 445   /* Insert unique names into hash table.  The V850 instruction set
 446      has many identical opcode names that have different opcodes based
 447      on the operands.  This hash table then provides a quick index to
 448      the first opcode with a particular name in the opcode table.  */
 449
 450   op     = v850_opcodes;
 451   while (op->name)
 452     {
 453       if (strcmp (prev_name, op->name))
 454         {
 455           prev_name = (char *) op->name;
 456           hash_insert (v850_hash, op->name, (char *) op);
 457         }
 458       op++;
 459     }
 460 }
 461
 462
 463 static bfd_reloc_code_real_type
 464 get_reloc (op)
 465      struct v850_operand *op;
 466 {
 467   abort ();
 468 }
 469
 470
 471 void
 472 md_assemble (str)
 473      char *str;
 474 {
 475   char *s;
 476   struct v850_opcode *opcode;
 477   struct v850_opcode *next_opcode;
 478   const unsigned char *opindex_ptr;
 479   int next_opindex;
 480   unsigned long insn;
 481   char *f;
 482   int i;
 483   int numops;
 484   int match;
 485
 486   int numopts;
 487   expressionS myops[5];
 488
 489   /* Get the opcode.  */
 490   for (s = str; *s != '\0' && ! isspace (*s); s++)
 491     ;
 492   if (*s != '\0')
 493     *s++ = '\0';
 494
 495   /* find the first opcode with the proper name */
 496   opcode = (struct v850_opcode *)hash_find (v850_hash, str);
 497   if (opcode == NULL)
 498     {
 499       as_bad ("Unrecognized opcode: `%s'", str);
 500       return;
 501     }
 502
 503   str = s;
 504   while (isspace (*str))
 505     ++str;
 506
 507   input_line_pointer = str;
 508
 509   for(;;)
 510     {
 511       const char *errmsg = NULL;
 512
 513       fc = 0;
 514       match = 0;
 515       next_opindex = 0;
 516       insn = opcode->opcode;
 517       for (opindex_ptr = opcode->operands; *opindex_ptr != 0; opindex_ptr++)
 518         {
 519           const struct v850_operand *operand;
 520           char *hold;
 521           expressionS ex;
 522           char endc;
 523
 524           if (next_opindex == 0)
 525             {
 526               operand = &v850_operands[*opindex_ptr];
 527             }
 528           else
 529             {
 530               operand = &v850_operands[next_opindex];
 531               next_opindex = 0;
 532             }
 533
 534           errmsg = NULL;
 535
 536           while (*str == ' ' || *str == ',' || *str == '[' || *str == ']')
 537             ++str;
 538
 539           /* Gather the operand. */
 540           hold = input_line_pointer;
 541           input_line_pointer = str;
 542
 543           if ((operand->flags & V850_OPERAND_REG) != 0)
 544             {
 545               if (!register_name(&ex))
 546                 {
 547                   errmsg = "invalid register name";
 548                   goto error;
 549                 }
 550             }
 551           else if ((operand->flags & V850_OPERAND_SRG) != 0)
 552             {
 553               if (!system_register_name(&ex))
 554                 {
 555                   errmsg = "invalid system register name";
 556                   goto error;
 557                 }
 558             }
 559           else if ((operand->flags & V850_OPERAND_EP) != 0)
 560             {
 561               char *start = input_line_pointer;
 562               char c = get_symbol_end ();
 563               if (strcmp (start, "ep") != 0
 564                   && strcmp (start, "r30") != 0)
 565                 {
 566                   /* Put things back the way we found them.  */
 567                   *input_line_pointer = c;
 568                   input_line_pointer = start;
 569                   errmsg = "expected EP register";
 570                   goto error;
 571                 }
 572               *input_line_pointer = c;
 573               str = input_line_pointer;
 574               input_line_pointer = hold;
 575
 576               while (*str == ' ' || *str == ',' || *str == '[' || *str == ']')
 577                 ++str;
 578               continue;
 579             }
 580           else if ((operand->flags & V850_OPERAND_CC) != 0)
 581             {
 582               if (!cc_name(&ex))
 583                 {
 584                   errmsg = "invalid condition code name";
 585                   goto error;
 586                 }
 587             }
 588           else if (strncmp(input_line_pointer, "lo(", 3) == 0)
 589             {
 590               input_line_pointer += 3;
 591               expression(&ex);
 592
 593               if (*input_line_pointer++ != ')')
 594                 {
 595                   errmsg = "syntax error: expected `)'";
 596                   goto error;
 597                 }
 598
 599               if (ex.X_op == O_constant)
 600                 ex.X_add_number = (signed)((ex.X_add_number & 0xffff) << 16) >> 16;
 601               else
 602                 {
 603                   if (fc > MAX_INSN_FIXUPS)
 604                     as_fatal ("too many fixups");
 605
 606                   fixups[fc].exp = ex;
 607                   fixups[fc].opindex = *opindex_ptr;
 608                   fixups[fc].reloc = BFD_RELOC_LO16;
 609                   fc++;
 610                 }
 611             }
 612           else if (strncmp(input_line_pointer, "hi(", 3) == 0)
 613             {
 614               input_line_pointer += 3;
 615               expression(&ex);
 616
 617               if (*input_line_pointer++ != ')')
 618                 {
 619                   errmsg = "syntax error: expected `)'";
 620                   goto error;
 621                 }
 622
 623               if (ex.X_op == O_constant)
 624                 {
 625                   unsigned long temp = ex.X_add_number;
 626                   ex.X_add_number = (signed)(temp & 0xffff0000) >> 16;
 627
 628                   /* If the would be on for the low part, then we have
 629                      to add it into the high part.  */
 630                   if (temp & 0x8000)
 631                     ex.X_add_number += 1;
 632                 }
 633               else
 634                 {
 635                   if (fc > MAX_INSN_FIXUPS)
 636                     as_fatal ("too many fixups");
 637
 638                   fixups[fc].exp = ex;
 639                   fixups[fc].opindex = *opindex_ptr;
 640                   fixups[fc].reloc = BFD_RELOC_HI16_S;
 641                   fc++;
 642                 }
 643             }
 644           else if (strncmp(input_line_pointer, "hi0(", 4) == 0)
 645             {
 646               input_line_pointer += 4;
 647               expression(&ex);
 648
 649               if (*input_line_pointer++ != ')')
 650                 {
 651                   errmsg = "syntax error: expected `)'";
 652                   goto error;
 653                 }
 654
 655               if (ex.X_op == O_constant)
 656                 ex.X_add_number = (signed)(ex.X_add_number & 0xffff0000) >> 16;
 657               else
 658                 {
 659                   if (fc > MAX_INSN_FIXUPS)
 660                     as_fatal ("too many fixups");
 661
 662                   fixups[fc].exp = ex;
 663                   fixups[fc].opindex = *opindex_ptr;
 664                   fixups[fc].reloc = BFD_RELOC_HI16;
 665                   fc++;
 666                 }
 667             }
 668           else if (register_name (&ex)
 669                    && (operand->flags & V850_OPERAND_REG) == 0)
 670             {
 671               errmsg = "syntax error: register not expected";
 672               goto error;
 673             }
 674           else if (system_register_name (&ex)
 675                    && (operand->flags & V850_OPERAND_SRG) == 0)
 676             {
 677               errmsg = "syntax error: system register not expected";
 678               goto error;
 679             }
 680           else if (cc_name (&ex)
 681                    && (operand->flags & V850_OPERAND_CC) == 0)
 682             {
 683               errmsg = "syntax error: condition code not expected";
 684               goto error;
 685             }
 686           else
 687             {
 688                 expression(&ex);
 689             }
 690
 691           str = input_line_pointer;
 692           input_line_pointer = hold;
 693
 694           switch (ex.X_op)
 695             {
 696             case O_illegal:
 697               errmsg = "illegal operand";
 698               goto error;
 699             case O_absent:
 700               errmsg = "missing operand";
 701               goto error;
 702             case O_register:
 703               if ((operand->flags & (V850_OPERAND_REG | V850_OPERAND_SRG)) == 0)
 704                 {
 705                   errmsg = "invalid operand";
 706                   goto error;
 707                 }
 708
 709               insn = v850_insert_operand (insn, operand, ex.X_add_number,
 710                                           (char *) NULL, 0);
 711               break;
 712
 713             case O_constant:
 714               insn = v850_insert_operand (insn, operand, ex.X_add_number,
 715                                           (char *) NULL, 0);
 716               break;
 717
 718             default:
 719               /* We need to generate a fixup for this expression.  */
 720               if (fc >= MAX_INSN_FIXUPS)
 721                 as_fatal ("too many fixups");
 722               fixups[fc].exp = ex;
 723               fixups[fc].opindex = *opindex_ptr;
 724               fixups[fc].reloc = BFD_RELOC_UNUSED;
 725               ++fc;
 726               break;
 727             }
 728
 729           while (*str == ' ' || *str == ',' || *str == '[' || *str == ']')
 730             ++str;
 731         }
 732       match = 1;
 733
 734     error:
 735       if (match == 0)
 736         {
 737           next_opcode = opcode + 1;
 738           if (next_opcode->opcode != 0 && !strcmp(next_opcode->name, opcode->name))
 739             {
 740               opcode = next_opcode;
 741               continue;
 742             }
 743
 744           as_bad ("%s", errmsg);
 745           return;
 746         }
 747       break;
 748     }
 749
 750   while (isspace (*str))
 751     ++str;
 752
 753   if (*str != '\0')
 754     as_bad ("junk at end of line: `%s'", str);
 755
 756   input_line_pointer = str;
 757
 758   f = frag_more (opcode->size);
 759   md_number_to_chars (f, insn, opcode->size);
 760 }
 761
 762
 763 /* if while processing a fixup, a reloc really needs to be created */
 764 /* then it is done here */
 765
 766 arelent *
 767 tc_gen_reloc (seg, fixp)
 768      asection *seg;
 769      fixS *fixp;
 770 {
 771   arelent *reloc;
 772   reloc = (arelent *) bfd_alloc_by_size_t (stdoutput, sizeof (arelent));
 773   reloc->sym_ptr_ptr = &fixp->fx_addsy->bsym;
 774   reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
 775   reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
 776   if (reloc->howto == (reloc_howto_type *) NULL)
 777     {
 778       as_bad_where (fixp->fx_file, fixp->fx_line,
 779                     "reloc %d not supported by object file format", (int)fixp->fx_r_type);
 780       return NULL;
 781     }
 782   reloc->addend = fixp->fx_addnumber;
 783   /*  printf("tc_gen_reloc: addr=%x  addend=%x\n", reloc->address, reloc->addend); */
 784   return reloc;
 785 }
 786
 787 int
 788 md_estimate_size_before_relax (fragp, seg)
 789      fragS *fragp;
 790      asection *seg;
 791 {
 792   abort ();
 793   return 0;
 794 }
 795
 796 long
 797 md_pcrel_from_section (fixp, sec)
 798      fixS *fixp;
 799      segT sec;
 800 {
 801     return 0;
 802     /*  return fixp->fx_frag->fr_address + fixp->fx_where; */
 803 }
 804
 805 int
 806 md_apply_fix3 (fixp, valuep, seg)
 807      fixS *fixp;
 808      valueT *valuep;
 809      segT seg;
 810 {
 811   as_tsktsk ("relocations not supported yet.\n");
 812   fixp->fx_done = 1;
 813   return 1;
 814   abort();
 815 #if 0
 816   valueT value;
 817   char *where;
 818   unsigned long insn;
 819   int op_type;
 820
 821   if (fixp->fx_addsy == (symbolS *) NULL)
 822     {
 823       value = *valuep;
 824       fixp->fx_done = 1;
 825     }
 826   else if (fixp->fx_pcrel)
 827     value = *valuep;
 828   else
 829     {
 830       value = fixp->fx_offset;
 831       if (fixp->fx_subsy != (symbolS *) NULL)
 832         {
 833           if (S_GET_SEGMENT (fixp->fx_subsy) == absolute_section)
 834             value -= S_GET_VALUE (fixp->fx_subsy);
 835           else
 836             {
 837               /* We don't actually support subtracting a symbol.  */
 838               as_bad_where (fixp->fx_file, fixp->fx_line,
 839                             "expression too complex");
 840             }
 841         }
 842     }
 843
 844   /*   printf("md_apply_fix: value=0x%x  type=%d\n",  value, fixp->fx_r_type); */
 845
 846   op_type = fixp->fx_r_type;
 847   fixp->fx_r_type = get_reloc((struct v850_operand *)&v850_operands[op_type]);
 848
 849   /*  printf("reloc=%d\n",fixp->fx_r_type); */
 850
 851   /* Fetch the instruction, insert the fully resolved operand
 852      value, and stuff the instruction back again.  */
 853   where = fixp->fx_frag->fr_literal + fixp->fx_where;
 854   insn = bfd_getb32 ((unsigned char *) where);
 855   /* printf("   insn=%x  value=%x\n",insn,value); */
 856
 857   insn = v850_insert_operand (insn, op_type, (offsetT) value);
 858
 859   /* printf("   new insn=%x\n",insn); */
 860
 861   bfd_putb32 ((bfd_vma) insn, (unsigned char *) where);
 862
 863   if (fixp->fx_done)
 864     return 1;
 865
 866   fixp->fx_addnumber = value;
 867   return 1;
 868 #endif
 869 }
 870
 871 \f
 872 /* Insert an operand value into an instruction.  */
 873
 874 static unsigned long
 875 v850_insert_operand (insn, operand, val, file, line)
 876      unsigned long insn;
 877      const struct v850_operand *operand;
 878      offsetT val;
 879      char *file;
 880      unsigned int line;
 881 {
 882   if (operand->bits != 32)
 883     {
 884       long min, max;
 885       offsetT test;
 886
 887       if ((operand->flags & V850_OPERAND_SIGNED) != 0)
 888         {
 889 #if 0
 890           if ((operand->flags & PPC_OPERAND_SIGNOPT) != 0
 891               && ppc_size == PPC_OPCODE_32)
 892             max = (1 << operand->bits) - 1;
 893           else
 894 #endif
 895             max = (1 << (operand->bits - 1)) - 1;
 896           min = - (1 << (operand->bits - 1));
 897         }
 898       else
 899         {
 900           max = (1 << operand->bits) - 1;
 901           min = 0;
 902         }
 903
 904 #if 0
 905       if ((operand->flags & PPC_OPERAND_NEGATIVE) != 0)
 906         test = - val;
 907       else
 908 #endif
 909         test = val;
 910
 911
 912       if (test < (offsetT) min || test > (offsetT) max)
 913         {
 914           const char *err =
 915             "operand out of range (%s not between %ld and %ld)";
 916           char buf[100];
 917
 918           sprint_value (buf, test);
 919           if (file == (char *) NULL)
 920             as_warn (err, buf, min, max);
 921           else
 922             as_warn_where (file, line, err, buf, min, max);
 923         }
 924     }
 925
 926   insn |= (((long) val & ((1 << operand->bits) - 1)) << operand->shift);
 927   return insn;
 928 }