gas/config/tc-bfin.c

   1 /* tc-bfin.c -- Assembler for the ADI Blackfin.
   2    Copyright 2005, 2006
   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, 51 Franklin Street - Fifth Floor, Boston, MA
  20    02110-1301, USA.  */
  21
  22 #include "as.h"
  23 #include "struc-symbol.h"
  24 #include "bfin-defs.h"
  25 #include "obstack.h"
  26 #include "safe-ctype.h"
  27 #ifdef OBJ_ELF
  28 #include "dwarf2dbg.h"
  29 #endif
  30 #include "libbfd.h"
  31 #include "elf/common.h"
  32 #include "elf/bfin.h"
  33
  34 extern int yyparse (void);
  35 struct yy_buffer_state;
  36 typedef struct yy_buffer_state *YY_BUFFER_STATE;
  37 extern YY_BUFFER_STATE yy_scan_string (const char *yy_str);
  38 extern void yy_delete_buffer (YY_BUFFER_STATE b);
  39 static parse_state parse (char *line);
  40 static void bfin_s_bss PARAMS ((int));
  41 static int md_chars_to_number PARAMS ((char *, int));
  42
  43 /* Global variables. */
  44 struct bfin_insn *insn;
  45 int last_insn_size;
  46
  47 extern struct obstack mempool;
  48 FILE *errorf;
  49
  50 /* Flags to set in the elf header */
  51 #define DEFAULT_FLAGS 0
  52
  53 static flagword bfin_flags = DEFAULT_FLAGS;
  54 static const char *bfin_pic_flag = (const char *)0;
  55
  56 /* Registers list.  */
  57 struct bfin_reg_entry
  58 {
  59   const char *name;
  60   int number;
  61 };
  62
  63 static const struct bfin_reg_entry bfin_reg_info[] = {
  64   {"R0.L", REG_RL0},
  65   {"R1.L", REG_RL1},
  66   {"R2.L", REG_RL2},
  67   {"R3.L", REG_RL3},
  68   {"R4.L", REG_RL4},
  69   {"R5.L", REG_RL5},
  70   {"R6.L", REG_RL6},
  71   {"R7.L", REG_RL7},
  72   {"R0.H", REG_RH0},
  73   {"R1.H", REG_RH1},
  74   {"R2.H", REG_RH2},
  75   {"R3.H", REG_RH3},
  76   {"R4.H", REG_RH4},
  77   {"R5.H", REG_RH5},
  78   {"R6.H", REG_RH6},
  79   {"R7.H", REG_RH7},
  80   {"R0", REG_R0},
  81   {"R1", REG_R1},
  82   {"R2", REG_R2},
  83   {"R3", REG_R3},
  84   {"R4", REG_R4},
  85   {"R5", REG_R5},
  86   {"R6", REG_R6},
  87   {"R7", REG_R7},
  88   {"P0", REG_P0},
  89   {"P0.H", REG_P0},
  90   {"P0.L", REG_P0},
  91   {"P1", REG_P1},
  92   {"P1.H", REG_P1},
  93   {"P1.L", REG_P1},
  94   {"P2", REG_P2},
  95   {"P2.H", REG_P2},
  96   {"P2.L", REG_P2},
  97   {"P3", REG_P3},
  98   {"P3.H", REG_P3},
  99   {"P3.L", REG_P3},
 100   {"P4", REG_P4},
 101   {"P4.H", REG_P4},
 102   {"P4.L", REG_P4},
 103   {"P5", REG_P5},
 104   {"P5.H", REG_P5},
 105   {"P5.L", REG_P5},
 106   {"SP", REG_SP},
 107   {"SP.L", REG_SP},
 108   {"SP.H", REG_SP},
 109   {"FP", REG_FP},
 110   {"FP.L", REG_FP},
 111   {"FP.H", REG_FP},
 112   {"A0x", REG_A0x},
 113   {"A1x", REG_A1x},
 114   {"A0w", REG_A0w},
 115   {"A1w", REG_A1w},
 116   {"A0.x", REG_A0x},
 117   {"A1.x", REG_A1x},
 118   {"A0.w", REG_A0w},
 119   {"A1.w", REG_A1w},
 120   {"A0", REG_A0},
 121   {"A0.L", REG_A0},
 122   {"A0.H", REG_A0},
 123   {"A1", REG_A1},
 124   {"A1.L", REG_A1},
 125   {"A1.H", REG_A1},
 126   {"I0", REG_I0},
 127   {"I0.L", REG_I0},
 128   {"I0.H", REG_I0},
 129   {"I1", REG_I1},
 130   {"I1.L", REG_I1},
 131   {"I1.H", REG_I1},
 132   {"I2", REG_I2},
 133   {"I2.L", REG_I2},
 134   {"I2.H", REG_I2},
 135   {"I3", REG_I3},
 136   {"I3.L", REG_I3},
 137   {"I3.H", REG_I3},
 138   {"M0", REG_M0},
 139   {"M0.H", REG_M0},
 140   {"M0.L", REG_M0},
 141   {"M1", REG_M1},
 142   {"M1.H", REG_M1},
 143   {"M1.L", REG_M1},
 144   {"M2", REG_M2},
 145   {"M2.H", REG_M2},
 146   {"M2.L", REG_M2},
 147   {"M3", REG_M3},
 148   {"M3.H", REG_M3},
 149   {"M3.L", REG_M3},
 150   {"B0", REG_B0},
 151   {"B0.H", REG_B0},
 152   {"B0.L", REG_B0},
 153   {"B1", REG_B1},
 154   {"B1.H", REG_B1},
 155   {"B1.L", REG_B1},
 156   {"B2", REG_B2},
 157   {"B2.H", REG_B2},
 158   {"B2.L", REG_B2},
 159   {"B3", REG_B3},
 160   {"B3.H", REG_B3},
 161   {"B3.L", REG_B3},
 162   {"L0", REG_L0},
 163   {"L0.H", REG_L0},
 164   {"L0.L", REG_L0},
 165   {"L1", REG_L1},
 166   {"L1.H", REG_L1},
 167   {"L1.L", REG_L1},
 168   {"L2", REG_L2},
 169   {"L2.H", REG_L2},
 170   {"L2.L", REG_L2},
 171   {"L3", REG_L3},
 172   {"L3.H", REG_L3},
 173   {"L3.L", REG_L3},
 174   {"AZ", S_AZ},
 175   {"AN", S_AN},
 176   {"AC0", S_AC0},
 177   {"AC1", S_AC1},
 178   {"AV0", S_AV0},
 179   {"AV0S", S_AV0S},
 180   {"AV1", S_AV1},
 181   {"AV1S", S_AV1S},
 182   {"AQ", S_AQ},
 183   {"V", S_V},
 184   {"VS", S_VS},
 185   {"sftreset", REG_sftreset},
 186   {"omode", REG_omode},
 187   {"excause", REG_excause},
 188   {"emucause", REG_emucause},
 189   {"idle_req", REG_idle_req},
 190   {"hwerrcause", REG_hwerrcause},
 191   {"CC", REG_CC},
 192   {"LC0", REG_LC0},
 193   {"LC1", REG_LC1},
 194   {"ASTAT", REG_ASTAT},
 195   {"RETS", REG_RETS},
 196   {"LT0", REG_LT0},
 197   {"LB0", REG_LB0},
 198   {"LT1", REG_LT1},
 199   {"LB1", REG_LB1},
 200   {"CYCLES", REG_CYCLES},
 201   {"CYCLES2", REG_CYCLES2},
 202   {"USP", REG_USP},
 203   {"SEQSTAT", REG_SEQSTAT},
 204   {"SYSCFG", REG_SYSCFG},
 205   {"RETI", REG_RETI},
 206   {"RETX", REG_RETX},
 207   {"RETN", REG_RETN},
 208   {"RETE", REG_RETE},
 209   {"EMUDAT", REG_EMUDAT},
 210   {0, 0}
 211 };
 212
 213 /* Blackfin specific function to handle FD-PIC pointer initializations.  */
 214
 215 static void
 216 bfin_pic_ptr (int nbytes)
 217 {
 218   expressionS exp;
 219   char *p;
 220
 221   if (nbytes != 4)
 222     abort ();
 223
 224 #ifdef md_flush_pending_output
 225   md_flush_pending_output ();
 226 #endif
 227
 228   if (is_it_end_of_statement ())
 229     {
 230       demand_empty_rest_of_line ();
 231       return;
 232     }
 233
 234 #ifdef md_cons_align
 235   md_cons_align (nbytes);
 236 #endif
 237
 238   do
 239     {
 240       bfd_reloc_code_real_type reloc_type = BFD_RELOC_BFIN_FUNCDESC;
 241
 242       if (strncasecmp (input_line_pointer, "funcdesc(", 9) == 0)
 243         {
 244           input_line_pointer += 9;
 245           expression (&exp);
 246           if (*input_line_pointer == ')')
 247             input_line_pointer++;
 248           else
 249             as_bad ("missing ')'");
 250         }
 251       else
 252         error ("missing funcdesc in picptr");
 253
 254       p = frag_more (4);
 255       memset (p, 0, 4);
 256       fix_new_exp (frag_now, p - frag_now->fr_literal, 4, &exp, 0,
 257                    reloc_type);
 258     }
 259   while (*input_line_pointer++ == ',');
 260
 261   input_line_pointer--;                 /* Put terminator back into stream. */
 262   demand_empty_rest_of_line ();
 263 }
 264
 265 static void
 266 bfin_s_bss (int ignore ATTRIBUTE_UNUSED)
 267 {
 268   register int temp;
 269
 270   temp = get_absolute_expression ();
 271   subseg_set (bss_section, (subsegT) temp);
 272   demand_empty_rest_of_line ();
 273 }
 274
 275 const pseudo_typeS md_pseudo_table[] = {
 276   {"align", s_align_bytes, 0},
 277   {"byte2", cons, 2},
 278   {"byte4", cons, 4},
 279   {"picptr", bfin_pic_ptr, 4},
 280   {"code", obj_elf_section, 0},
 281   {"db", cons, 1},
 282   {"dd", cons, 4},
 283   {"dw", cons, 2},
 284   {"p", s_ignore, 0},
 285   {"pdata", s_ignore, 0},
 286   {"var", s_ignore, 0},
 287   {"bss", bfin_s_bss, 0},
 288   {0, 0, 0}
 289 };
 290
 291 /* Characters that are used to denote comments and line separators. */
 292 const char comment_chars[] = "";
 293 const char line_comment_chars[] = "#";
 294 const char line_separator_chars[] = ";";
 295
 296 /* Characters that can be used to separate the mantissa from the
 297    exponent in floating point numbers. */
 298 const char EXP_CHARS[] = "eE";
 299
 300 /* Characters that mean this number is a floating point constant.
 301    As in 0f12.456 or  0d1.2345e12.  */
 302 const char FLT_CHARS[] = "fFdDxX";
 303
 304 /* Define bfin-specific command-line options (there are none). */
 305 const char *md_shortopts = "";
 306
 307 #define OPTION_FDPIC            (OPTION_MD_BASE)
 308
 309 struct option md_longopts[] =
 310 {
 311   { "mfdpic",           no_argument,            NULL, OPTION_FDPIC         },
 312   { NULL,               no_argument,            NULL, 0                 },
 313 };
 314
 315 size_t md_longopts_size = sizeof (md_longopts);
 316
 317
 318 int
 319 md_parse_option (int c ATTRIBUTE_UNUSED, char *arg ATTRIBUTE_UNUSED)
 320 {
 321   switch (c)
 322     {
 323     default:
 324       return 0;
 325
 326     case OPTION_FDPIC:
 327       bfin_flags |= EF_BFIN_FDPIC;
 328       bfin_pic_flag = "-mfdpic";
 329       break;
 330     }
 331
 332   return 1;
 333 }
 334
 335 void
 336 md_show_usage (FILE * stream ATTRIBUTE_UNUSED)
 337 {
 338   fprintf (stream, _(" BFIN specific command line options:\n"));
 339 }
 340
 341 /* Perform machine-specific initializations.  */
 342 void
 343 md_begin ()
 344 {
 345   /* Set the ELF flags if desired. */
 346   if (bfin_flags)
 347     bfd_set_private_flags (stdoutput, bfin_flags);
 348
 349   /* Set the default machine type. */
 350   if (!bfd_set_arch_mach (stdoutput, bfd_arch_bfin, 0))
 351     as_warn ("Could not set architecture and machine.");
 352
 353   /* Ensure that lines can begin with '(', for multiple
 354      register stack pops. */
 355   lex_type ['('] = LEX_BEGIN_NAME;
 356
 357 #ifdef OBJ_ELF
 358   record_alignment (text_section, 2);
 359   record_alignment (data_section, 2);
 360   record_alignment (bss_section, 2);
 361 #endif
 362
 363   errorf = stderr;
 364   obstack_init (&mempool);
 365
 366 #ifdef DEBUG
 367   extern int debug_codeselection;
 368   debug_codeselection = 1;
 369 #endif
 370
 371   last_insn_size = 0;
 372 }
 373
 374 /* Perform the main parsing, and assembly of the input here.  Also,
 375    call the required routines for alignment and fixups here.
 376    This is called for every line that contains real assembly code.  */
 377
 378 void
 379 md_assemble (char *line)
 380 {
 381   char *toP = 0;
 382   extern char *current_inputline;
 383   int size, insn_size;
 384   struct bfin_insn *tmp_insn;
 385   size_t len;
 386   static size_t buffer_len = 0;
 387   parse_state state;
 388
 389   len = strlen (line);
 390   if (len + 2 > buffer_len)
 391     {
 392       if (buffer_len > 0)
 393         free (current_inputline);
 394       buffer_len = len + 40;
 395       current_inputline = xmalloc (buffer_len);
 396     }
 397   memcpy (current_inputline, line, len);
 398   current_inputline[len] = ';';
 399   current_inputline[len + 1] = '\0';
 400
 401   state = parse (current_inputline);
 402   if (state == NO_INSN_GENERATED)
 403     return;
 404
 405   for (insn_size = 0, tmp_insn = insn; tmp_insn; tmp_insn = tmp_insn->next)
 406     if (!tmp_insn->reloc || !tmp_insn->exp->symbol)
 407       insn_size += 2;
 408
 409   if (insn_size)
 410     toP = frag_more (insn_size);
 411
 412   last_insn_size = insn_size;
 413
 414 #ifdef DEBUG
 415   printf ("INS:");
 416 #endif
 417   while (insn)
 418     {
 419       if (insn->reloc && insn->exp->symbol)
 420         {
 421           char *prev_toP = toP - 2;
 422           switch (insn->reloc)
 423             {
 424             case BFD_RELOC_BFIN_24_PCREL_JUMP_L:
 425             case BFD_RELOC_24_PCREL:
 426             case BFD_RELOC_BFIN_16_LOW:
 427             case BFD_RELOC_BFIN_16_HIGH:
 428               size = 4;
 429               break;
 430             default:
 431               size = 2;
 432             }
 433
 434           /* Following if condition checks for the arithmetic relocations.
 435              If the case then it doesn't required to generate the code.
 436              It has been assumed that, their ID will be contiguous.  */
 437           if ((BFD_ARELOC_BFIN_PUSH <= insn->reloc
 438                && BFD_ARELOC_BFIN_COMP >= insn->reloc)
 439               || insn->reloc == BFD_RELOC_BFIN_16_IMM)
 440             {
 441               size = 2;
 442             }
 443           if (insn->reloc == BFD_ARELOC_BFIN_CONST
 444               || insn->reloc == BFD_ARELOC_BFIN_PUSH)
 445             size = 4;
 446
 447           fix_new (frag_now,
 448                    (prev_toP - frag_now->fr_literal),
 449                    size, insn->exp->symbol, insn->exp->value,
 450                    insn->pcrel, insn->reloc);
 451         }
 452       else
 453         {
 454           md_number_to_chars (toP, insn->value, 2);
 455           toP += 2;
 456         }
 457
 458 #ifdef DEBUG
 459       printf (" reloc :");
 460       printf (" %02x%02x", ((unsigned char *) &insn->value)[0],
 461               ((unsigned char *) &insn->value)[1]);
 462       printf ("\n");
 463 #endif
 464       insn = insn->next;
 465     }
 466 #ifdef OBJ_ELF
 467   dwarf2_emit_insn (insn_size);
 468 #endif
 469 }
 470
 471 /* Parse one line of instructions, and generate opcode for it.
 472    To parse the line, YACC and LEX are used, because the instruction set
 473    syntax doesn't confirm to the AT&T assembly syntax.
 474    To call a YACC & LEX generated parser, we must provide the input via
 475    a FILE stream, otherwise stdin is used by default.  Below the input
 476    to the function will be put into a temporary file, then the generated
 477    parser uses the temporary file for parsing.  */
 478
 479 static parse_state
 480 parse (char *line)
 481 {
 482   parse_state state;
 483   YY_BUFFER_STATE buffstate;
 484
 485   buffstate = yy_scan_string (line);
 486
 487   /* our lex requires setting the start state to keyword
 488      every line as the first word may be a keyword.
 489      Fixes a bug where we could not have keywords as labels.  */
 490   set_start_state ();
 491
 492   /* Call yyparse here.  */
 493   state = yyparse ();
 494   if (state == SEMANTIC_ERROR)
 495     {
 496       as_bad ("Parse failed.");
 497       insn = 0;
 498     }
 499
 500   yy_delete_buffer (buffstate);
 501   return state;
 502 }
 503
 504 /* We need to handle various expressions properly.
 505    Such as, [SP--] = 34, concerned by md_assemble().  */
 506
 507 void
 508 md_operand (expressionS * expressionP)
 509 {
 510   if (*input_line_pointer == '[')
 511     {
 512       as_tsktsk ("We found a '['!");
 513       input_line_pointer++;
 514       expression (expressionP);
 515     }
 516 }
 517
 518 /* Handle undefined symbols. */
 519 symbolS *
 520 md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
 521 {
 522   return (symbolS *) 0;
 523 }
 524
 525 int
 526 md_estimate_size_before_relax (fragS * fragP ATTRIBUTE_UNUSED,
 527                                segT segment ATTRIBUTE_UNUSED)
 528 {
 529   return 0;
 530 }
 531
 532 /* Convert from target byte order to host byte order.  */
 533
 534 static int
 535 md_chars_to_number (char *val, int n)
 536 {
 537   int retval;
 538
 539   for (retval = 0; n--;)
 540     {
 541       retval <<= 8;
 542       retval |= val[n];
 543     }
 544   return retval;
 545 }
 546
 547 void
 548 md_apply_fix (fixS *fixP, valueT *valueP, segT seg ATTRIBUTE_UNUSED)
 549 {
 550   char *where = fixP->fx_frag->fr_literal + fixP->fx_where;
 551
 552   long value = *valueP;
 553   long newval;
 554
 555   switch (fixP->fx_r_type)
 556     {
 557     case BFD_RELOC_BFIN_GOT:
 558     case BFD_RELOC_BFIN_GOT17M4:
 559     case BFD_RELOC_BFIN_FUNCDESC_GOT17M4:
 560       fixP->fx_no_overflow = 1;
 561       newval = md_chars_to_number (where, 2);
 562       newval |= 0x0 & 0x7f;
 563       md_number_to_chars (where, newval, 2);
 564       break;
 565
 566     case BFD_RELOC_BFIN_10_PCREL:
 567       if (!value)
 568         break;
 569       if (value < -1024 || value > 1022)
 570         as_bad_where (fixP->fx_file, fixP->fx_line,
 571                       "pcrel too far BFD_RELOC_BFIN_10");
 572
 573       /* 11 bit offset even numbered, so we remove right bit.  */
 574       value = value >> 1;
 575       newval = md_chars_to_number (where, 2);
 576       newval |= value & 0x03ff;
 577       md_number_to_chars (where, newval, 2);
 578       break;
 579
 580     case BFD_RELOC_BFIN_12_PCREL_JUMP:
 581     case BFD_RELOC_BFIN_12_PCREL_JUMP_S:
 582     case BFD_RELOC_12_PCREL:
 583       if (!value)
 584         break;
 585
 586       if (value < -4096 || value > 4094)
 587         as_bad_where (fixP->fx_file, fixP->fx_line, "pcrel too far BFD_RELOC_BFIN_12");
 588       /* 13 bit offset even numbered, so we remove right bit.  */
 589       value = value >> 1;
 590       newval = md_chars_to_number (where, 2);
 591       newval |= value & 0xfff;
 592       md_number_to_chars (where, newval, 2);
 593       break;
 594
 595     case BFD_RELOC_BFIN_16_LOW:
 596     case BFD_RELOC_BFIN_16_HIGH:
 597       fixP->fx_done = FALSE;
 598       break;
 599
 600     case BFD_RELOC_BFIN_24_PCREL_JUMP_L:
 601     case BFD_RELOC_BFIN_24_PCREL_CALL_X:
 602     case BFD_RELOC_24_PCREL:
 603       if (!value)
 604         break;
 605
 606       if (value < -16777216 || value > 16777214)
 607         as_bad_where (fixP->fx_file, fixP->fx_line, "pcrel too far BFD_RELOC_BFIN_24");
 608
 609       /* 25 bit offset even numbered, so we remove right bit.  */
 610       value = value >> 1;
 611       value++;
 612
 613       md_number_to_chars (where - 2, value >> 16, 1);
 614       md_number_to_chars (where, value, 1);
 615       md_number_to_chars (where + 1, value >> 8, 1);
 616       break;
 617
 618     case BFD_RELOC_BFIN_5_PCREL:        /* LSETUP (a, b) : "a" */
 619       if (!value)
 620         break;
 621       if (value < 4 || value > 30)
 622         as_bad_where (fixP->fx_file, fixP->fx_line, "pcrel too far BFD_RELOC_BFIN_5");
 623       value = value >> 1;
 624       newval = md_chars_to_number (where, 1);
 625       newval = (newval & 0xf0) | (value & 0xf);
 626       md_number_to_chars (where, newval, 1);
 627       break;
 628
 629     case BFD_RELOC_BFIN_11_PCREL:       /* LSETUP (a, b) : "b" */
 630       if (!value)
 631         break;
 632       value += 2;
 633       if (value < 4 || value > 2046)
 634         as_bad_where (fixP->fx_file, fixP->fx_line, "pcrel too far BFD_RELOC_BFIN_11_PCREL");
 635       /* 11 bit unsigned even, so we remove right bit.  */
 636       value = value >> 1;
 637       newval = md_chars_to_number (where, 2);
 638       newval |= value & 0x03ff;
 639       md_number_to_chars (where, newval, 2);
 640       break;
 641
 642     case BFD_RELOC_8:
 643       if (value < -0x80 || value >= 0x7f)
 644         as_bad_where (fixP->fx_file, fixP->fx_line, "rel too far BFD_RELOC_8");
 645       md_number_to_chars (where, value, 1);
 646       break;
 647
 648     case BFD_RELOC_BFIN_16_IMM:
 649     case BFD_RELOC_16:
 650       if (value < -0x8000 || value >= 0x7fff)
 651         as_bad_where (fixP->fx_file, fixP->fx_line, "rel too far BFD_RELOC_8");
 652       md_number_to_chars (where, value, 2);
 653       break;
 654
 655     case BFD_RELOC_32:
 656       md_number_to_chars (where, value, 4);
 657       break;
 658
 659     case BFD_RELOC_BFIN_PLTPC:
 660       md_number_to_chars (where, value, 2);
 661       break;
 662
 663     case BFD_RELOC_BFIN_FUNCDESC:
 664     case BFD_RELOC_VTABLE_INHERIT:
 665     case BFD_RELOC_VTABLE_ENTRY:
 666       fixP->fx_done = FALSE;
 667       break;
 668
 669     default:
 670       if ((BFD_ARELOC_BFIN_PUSH > fixP->fx_r_type) || (BFD_ARELOC_BFIN_COMP < fixP->fx_r_type))
 671         {
 672           fprintf (stderr, "Relocation %d not handled in gas." " Contact support.\n", fixP->fx_r_type);
 673           return;
 674         }
 675     }
 676
 677   if (!fixP->fx_addsy)
 678     fixP->fx_done = TRUE;
 679
 680 }
 681
 682 /* Round up a section size to the appropriate boundary.  */
 683 valueT
 684 md_section_align (segment, size)
 685      segT segment;
 686      valueT size;
 687 {
 688   int boundary = bfd_get_section_alignment (stdoutput, segment);
 689   return ((size + (1 << boundary) - 1) & (-1 << boundary));
 690 }
 691
 692
 693 /* Turn a string in input_line_pointer into a floating point
 694    constant of type type, and store the appropriate bytes in
 695    *litP.  The number of LITTLENUMS emitted is stored in *sizeP.
 696    An error message is returned, or NULL on OK.  */
 697
 698 /* Equal to MAX_PRECISION in atof-ieee.c.  */
 699 #define MAX_LITTLENUMS 6
 700
 701 char *
 702 md_atof (type, litP, sizeP)
 703      char   type;
 704      char * litP;
 705      int *  sizeP;
 706 {
 707   int              prec;
 708   LITTLENUM_TYPE   words [MAX_LITTLENUMS];
 709   LITTLENUM_TYPE   *wordP;
 710   char *           t;
 711
 712   switch (type)
 713     {
 714     case 'f':
 715     case 'F':
 716       prec = 2;
 717       break;
 718
 719     case 'd':
 720     case 'D':
 721       prec = 4;
 722       break;
 723
 724    /* FIXME: Some targets allow other format chars for bigger sizes here.  */
 725
 726     default:
 727       *sizeP = 0;
 728       return _("Bad call to md_atof()");
 729     }
 730
 731   t = atof_ieee (input_line_pointer, type, words);
 732   if (t)
 733     input_line_pointer = t;
 734   *sizeP = prec * sizeof (LITTLENUM_TYPE);
 735
 736   *sizeP = prec * sizeof (LITTLENUM_TYPE);
 737   /* This loops outputs the LITTLENUMs in REVERSE order; in accord with
 738      the littleendianness of the processor.  */
 739   for (wordP = words + prec - 1; prec--;)
 740     {
 741       md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE));
 742       litP += sizeof (LITTLENUM_TYPE);
 743     }
 744
 745   return 0;
 746 }
 747
 748
 749 /* If while processing a fixup, a reloc really needs to be created
 750    then it is done here.  */
 751
 752 arelent *
 753 tc_gen_reloc (seg, fixp)
 754      asection *seg ATTRIBUTE_UNUSED;
 755      fixS *fixp;
 756 {
 757   arelent *reloc;
 758
 759   reloc               = (arelent *) xmalloc (sizeof (arelent));
 760   reloc->sym_ptr_ptr  = (asymbol **) xmalloc (sizeof (asymbol *));
 761   *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
 762   reloc->address      = fixp->fx_frag->fr_address + fixp->fx_where;
 763
 764   reloc->addend = fixp->fx_offset;
 765   reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
 766
 767   if (reloc->howto == (reloc_howto_type *) NULL)
 768     {
 769       as_bad_where (fixp->fx_file, fixp->fx_line,
 770                     /* xgettext:c-format.  */
 771                     _("reloc %d not supported by object file format"),
 772                     (int) fixp->fx_r_type);
 773
 774       xfree (reloc);
 775
 776       return NULL;
 777     }
 778
 779   return reloc;
 780 }
 781
 782 /*  The location from which a PC relative jump should be calculated,
 783     given a PC relative reloc.  */
 784
 785 long
 786 md_pcrel_from_section (fixP, sec)
 787      fixS *fixP;
 788      segT sec;
 789 {
 790   if (fixP->fx_addsy != (symbolS *) NULL
 791       && (!S_IS_DEFINED (fixP->fx_addsy)
 792       || S_GET_SEGMENT (fixP->fx_addsy) != sec))
 793     {
 794       /* The symbol is undefined (or is defined but not in this section).
 795          Let the linker figure it out.  */
 796       return 0;
 797     }
 798   return fixP->fx_frag->fr_address + fixP->fx_where;
 799 }
 800
 801 /* Return true if the fix can be handled by GAS, false if it must
 802    be passed through to the linker.  */
 803
 804 bfd_boolean
 805 bfin_fix_adjustable (fixS *fixP)
 806 {
 807   switch (fixP->fx_r_type)
 808     {
 809   /* Adjust_reloc_syms doesn't know about the GOT.  */
 810     case BFD_RELOC_BFIN_GOT:
 811     case BFD_RELOC_BFIN_GOT17M4:
 812     case BFD_RELOC_BFIN_FUNCDESC_GOT17M4:
 813     case BFD_RELOC_BFIN_PLTPC:
 814   /* We need the symbol name for the VTABLE entries.  */
 815     case BFD_RELOC_VTABLE_INHERIT:
 816     case BFD_RELOC_VTABLE_ENTRY:
 817       return 0;
 818
 819     default:
 820       return 1;
 821     }
 822 }
 823
 824
 825 /* Handle the LOOP_BEGIN and LOOP_END statements.
 826    Parse the Loop_Begin/Loop_End and create a label.  */
 827 void
 828 bfin_start_line_hook ()
 829 {
 830   bfd_boolean maybe_begin = FALSE;
 831   bfd_boolean maybe_end = FALSE;
 832
 833   char *c1, *label_name;
 834   symbolS *line_label;
 835   char *c = input_line_pointer;
 836   int cr_num = 0;
 837
 838   while (ISSPACE (*c))
 839     {
 840       if (*c == '\n')
 841         cr_num++;
 842       c++;
 843     }
 844
 845   /* Look for Loop_Begin or Loop_End statements.  */
 846
 847   if (*c != 'L' && *c != 'l')
 848     return;
 849
 850   c++;
 851   if (*c != 'O' && *c != 'o')
 852     return;
 853
 854   c++;
 855   if (*c != 'O' && *c != 'o')
 856     return;
 857
 858   c++;
 859   if (*c != 'P' && *c != 'p')
 860     return;
 861
 862   c++;
 863   if (*c != '_')
 864     return;
 865
 866   c++;
 867   if (*c == 'E' || *c == 'e')
 868     maybe_end = TRUE;
 869   else if (*c == 'B' || *c == 'b')
 870     maybe_begin = TRUE;
 871   else
 872     return;
 873
 874   if (maybe_end)
 875     {
 876       c++;
 877       if (*c != 'N' && *c != 'n')
 878         return;
 879
 880       c++;
 881       if (*c != 'D' && *c != 'd')
 882         return;
 883     }
 884
 885   if (maybe_begin)
 886     {
 887       c++;
 888       if (*c != 'E' && *c != 'e')
 889         return;
 890
 891       c++;
 892       if (*c != 'G' && *c != 'g')
 893         return;
 894
 895       c++;
 896       if (*c != 'I' && *c != 'i')
 897         return;
 898
 899       c++;
 900       if (*c != 'N' && *c != 'n')
 901         return;
 902     }
 903
 904   c++;
 905   while (ISSPACE (*c)) c++;
 906   c1 = c;
 907   while (ISALPHA (*c) || ISDIGIT (*c) || *c == '_') c++;
 908
 909   if (input_line_pointer[-1] == '\n')
 910     bump_line_counters ();
 911
 912   while (cr_num--)
 913     bump_line_counters ();
 914
 915   input_line_pointer = c;
 916   if (maybe_end)
 917     {
 918       label_name = (char *) xmalloc ((c - c1) + strlen ("__END") + 1);
 919       label_name[0] = 0;
 920       strncat (label_name, c1, c-c1);
 921       strcat (label_name, "__END");
 922     }
 923   else /* maybe_begin.  */
 924     {
 925       label_name = (char *) xmalloc ((c - c1) + strlen ("__BEGIN") + 1);
 926       label_name[0] = 0;
 927       strncat (label_name, c1, c-c1);
 928       strcat (label_name, "__BEGIN");
 929     }
 930
 931   line_label = colon (label_name);
 932
 933   /* Loop_End follows the last instruction in the loop.
 934      Adjust label address.  */
 935   if (maybe_end)
 936     line_label->sy_value.X_add_number -= last_insn_size;
 937
 938 }
 939
 940 /* Special extra functions that help bfin-parse.y perform its job.  */
 941
 942 #include <assert.h>
 943
 944 struct obstack mempool;
 945
 946 INSTR_T
 947 conscode (INSTR_T head, INSTR_T tail)
 948 {
 949   if (!head)
 950     return tail;
 951   head->next = tail;
 952   return head;
 953 }
 954
 955 INSTR_T
 956 conctcode (INSTR_T head, INSTR_T tail)
 957 {
 958   INSTR_T temp = (head);
 959   if (!head)
 960     return tail;
 961   while (temp->next)
 962     temp = temp->next;
 963   temp->next = tail;
 964
 965   return head;
 966 }
 967
 968 INSTR_T
 969 note_reloc (INSTR_T code, Expr_Node * symbol, int reloc, int pcrel)
 970 {
 971   /* Assert that the symbol is not an operator.  */
 972   assert (symbol->type == Expr_Node_Reloc);
 973
 974   return note_reloc1 (code, symbol->value.s_value, reloc, pcrel);
 975
 976 }
 977
 978 INSTR_T
 979 note_reloc1 (INSTR_T code, const char *symbol, int reloc, int pcrel)
 980 {
 981   code->reloc = reloc;
 982   code->exp = mkexpr (0, symbol_find_or_make (symbol));
 983   code->pcrel = pcrel;
 984   return code;
 985 }
 986
 987 INSTR_T
 988 note_reloc2 (INSTR_T code, const char *symbol, int reloc, int value, int pcrel)
 989 {
 990   code->reloc = reloc;
 991   code->exp = mkexpr (value, symbol_find_or_make (symbol));
 992   code->pcrel = pcrel;
 993   return code;
 994 }
 995
 996 INSTR_T
 997 gencode (unsigned long x)
 998 {
 999   INSTR_T cell = (INSTR_T) obstack_alloc (&mempool, sizeof (struct bfin_insn));
1000   memset (cell, 0, sizeof (struct bfin_insn));
1001   cell->value = (x);
1002   return cell;
1003 }
1004
1005 int reloc;
1006 int ninsns;
1007 int count_insns;
1008
1009 static void *
1010 allocate (int n)
1011 {
1012   return (void *) obstack_alloc (&mempool, n);
1013 }
1014
1015 Expr_Node *
1016 Expr_Node_Create (Expr_Node_Type type,
1017                   Expr_Node_Value value,
1018                   Expr_Node *Left_Child,
1019                   Expr_Node *Right_Child)
1020 {
1021
1022
1023   Expr_Node *node = (Expr_Node *) allocate (sizeof (Expr_Node));
1024   node->type = type;
1025   node->value = value;
1026   node->Left_Child = Left_Child;
1027   node->Right_Child = Right_Child;
1028   return node;
1029 }
1030
1031 static const char *con = ".__constant";
1032 static const char *op = ".__operator";
1033 static INSTR_T Expr_Node_Gen_Reloc_R (Expr_Node * head);
1034 INSTR_T Expr_Node_Gen_Reloc (Expr_Node *head, int parent_reloc);
1035
1036 INSTR_T
1037 Expr_Node_Gen_Reloc (Expr_Node * head, int parent_reloc)
1038 {
1039   /* Top level reloction expression generator VDSP style.
1040    If the relocation is just by itself, generate one item
1041    else generate this convoluted expression.  */
1042
1043   INSTR_T note = NULL_CODE;
1044   INSTR_T note1 = NULL_CODE;
1045   int pcrel = 1;  /* Is the parent reloc pcrelative?
1046                   This calculation here and HOWTO should match.  */
1047
1048   if (parent_reloc)
1049     {
1050       /*  If it's 32 bit quantity then 16bit code needs to be added.  */
1051       int value = 0;
1052
1053       if (head->type == Expr_Node_Constant)
1054         {
1055           /* If note1 is not null code, we have to generate a right
1056              aligned value for the constant. Otherwise the reloc is
1057              a part of the basic command and the yacc file
1058              generates this.  */
1059           value = head->value.i_value;
1060         }
1061       switch (parent_reloc)
1062         {
1063           /*  Some relocations will need to allocate extra words.  */
1064         case BFD_RELOC_BFIN_16_IMM:
1065         case BFD_RELOC_BFIN_16_LOW:
1066         case BFD_RELOC_BFIN_16_HIGH:
1067           note1 = conscode (gencode (value), NULL_CODE);
1068           pcrel = 0;
1069           break;
1070         case BFD_RELOC_BFIN_PLTPC:
1071           note1 = conscode (gencode (value), NULL_CODE);
1072           pcrel = 0;
1073           break;
1074         case BFD_RELOC_16:
1075         case BFD_RELOC_BFIN_GOT:
1076         case BFD_RELOC_BFIN_GOT17M4:
1077         case BFD_RELOC_BFIN_FUNCDESC_GOT17M4:
1078           note1 = conscode (gencode (value), NULL_CODE);
1079           pcrel = 0;
1080           break;
1081         case BFD_RELOC_24_PCREL:
1082         case BFD_RELOC_BFIN_24_PCREL_JUMP_L:
1083         case BFD_RELOC_BFIN_24_PCREL_CALL_X:
1084           /* These offsets are even numbered pcrel.  */
1085           note1 = conscode (gencode (value >> 1), NULL_CODE);
1086           break;
1087         default:
1088           note1 = NULL_CODE;
1089         }
1090     }
1091   if (head->type == Expr_Node_Constant)
1092     note = note1;
1093   else if (head->type == Expr_Node_Reloc)
1094     {
1095       note = note_reloc1 (gencode (0), head->value.s_value, parent_reloc, pcrel);
1096       if (note1 != NULL_CODE)
1097         note = conscode (note1, note);
1098     }
1099   else if (head->type == Expr_Node_Binop
1100            && (head->value.op_value == Expr_Op_Type_Add
1101                || head->value.op_value == Expr_Op_Type_Sub)
1102            && head->Left_Child->type == Expr_Node_Reloc
1103            && head->Right_Child->type == Expr_Node_Constant)
1104     {
1105       int val = head->Right_Child->value.i_value;
1106       if (head->value.op_value == Expr_Op_Type_Sub)
1107         val = -val;
1108       note = conscode (note_reloc2 (gencode (0), head->Left_Child->value.s_value,
1109                                     parent_reloc, val, 0),
1110                        NULL_CODE);
1111       if (note1 != NULL_CODE)
1112         note = conscode (note1, note);
1113     }
1114   else
1115     {
1116       /* Call the recursive function.  */
1117       note = note_reloc1 (gencode (0), op, parent_reloc, pcrel);
1118       if (note1 != NULL_CODE)
1119         note = conscode (note1, note);
1120       note = conctcode (Expr_Node_Gen_Reloc_R (head), note);
1121     }
1122   return note;
1123 }
1124
1125 static INSTR_T
1126 Expr_Node_Gen_Reloc_R (Expr_Node * head)
1127 {
1128
1129   INSTR_T note = 0;
1130   INSTR_T note1 = 0;
1131
1132   switch (head->type)
1133     {
1134     case Expr_Node_Constant:
1135       note = conscode (note_reloc2 (gencode (0), con, BFD_ARELOC_BFIN_CONST, head->value.i_value, 0), NULL_CODE);
1136       break;
1137     case Expr_Node_Reloc:
1138       note = conscode (note_reloc (gencode (0), head, BFD_ARELOC_BFIN_PUSH, 0), NULL_CODE);
1139       break;
1140     case Expr_Node_Binop:
1141       note1 = conctcode (Expr_Node_Gen_Reloc_R (head->Left_Child), Expr_Node_Gen_Reloc_R (head->Right_Child));
1142       switch (head->value.op_value)
1143         {
1144         case Expr_Op_Type_Add:
1145           note = conctcode (note1, conscode (note_reloc1 (gencode (0), op, BFD_ARELOC_BFIN_ADD, 0), NULL_CODE));
1146           break;
1147         case Expr_Op_Type_Sub:
1148           note = conctcode (note1, conscode (note_reloc1 (gencode (0), op, BFD_ARELOC_BFIN_SUB, 0), NULL_CODE));
1149           break;
1150         case Expr_Op_Type_Mult:
1151           note = conctcode (note1, conscode (note_reloc1 (gencode (0), op, BFD_ARELOC_BFIN_MULT, 0), NULL_CODE));
1152           break;
1153         case Expr_Op_Type_Div:
1154           note = conctcode (note1, conscode (note_reloc1 (gencode (0), op, BFD_ARELOC_BFIN_DIV, 0), NULL_CODE));
1155           break;
1156         case Expr_Op_Type_Mod:
1157           note = conctcode (note1, conscode (note_reloc1 (gencode (0), op, BFD_ARELOC_BFIN_MOD, 0), NULL_CODE));
1158           break;
1159         case Expr_Op_Type_Lshift:
1160           note = conctcode (note1, conscode (note_reloc1 (gencode (0), op, BFD_ARELOC_BFIN_LSHIFT, 0), NULL_CODE));
1161           break;
1162         case Expr_Op_Type_Rshift:
1163           note = conctcode (note1, conscode (note_reloc1 (gencode (0), op, BFD_ARELOC_BFIN_RSHIFT, 0), NULL_CODE));
1164           break;
1165         case Expr_Op_Type_BAND:
1166           note = conctcode (note1, conscode (note_reloc1 (gencode (0), op, BFD_ARELOC_BFIN_AND, 0), NULL_CODE));
1167           break;
1168         case Expr_Op_Type_BOR:
1169           note = conctcode (note1, conscode (note_reloc1 (gencode (0), op, BFD_ARELOC_BFIN_OR, 0), NULL_CODE));
1170           break;
1171         case Expr_Op_Type_BXOR:
1172           note = conctcode (note1, conscode (note_reloc1 (gencode (0), op, BFD_ARELOC_BFIN_XOR, 0), NULL_CODE));
1173           break;
1174         case Expr_Op_Type_LAND:
1175           note = conctcode (note1, conscode (note_reloc1 (gencode (0), op, BFD_ARELOC_BFIN_LAND, 0), NULL_CODE));
1176           break;
1177         case Expr_Op_Type_LOR:
1178           note = conctcode (note1, conscode (note_reloc1 (gencode (0), op, BFD_ARELOC_BFIN_LOR, 0), NULL_CODE));
1179           break;
1180         default:
1181           fprintf (stderr, "%s:%d:Unkonwn operator found for arithmetic" " relocation", __FILE__, __LINE__);
1182
1183
1184         }
1185       break;
1186     case Expr_Node_Unop:
1187       note1 = conscode (Expr_Node_Gen_Reloc_R (head->Left_Child), NULL_CODE);
1188       switch (head->value.op_value)
1189         {
1190         case Expr_Op_Type_NEG:
1191           note = conctcode (note1, conscode (note_reloc1 (gencode (0), op, BFD_ARELOC_BFIN_NEG, 0), NULL_CODE));
1192           break;
1193         case Expr_Op_Type_COMP:
1194           note = conctcode (note1, conscode (note_reloc1 (gencode (0), op, BFD_ARELOC_BFIN_COMP, 0), NULL_CODE));
1195           break;
1196         default:
1197           fprintf (stderr, "%s:%d:Unkonwn operator found for arithmetic" " relocation", __FILE__, __LINE__);
1198         }
1199       break;
1200     default:
1201       fprintf (stderr, "%s:%d:Unknown node expression found during " "arithmetic relocation generation", __FILE__, __LINE__);
1202     }
1203   return note;
1204 }
1205
1206
1207 /* Blackfin opcode generation.  */
1208
1209 /* These functions are called by the generated parser
1210    (from bfin-parse.y), the register type classification
1211    happens in bfin-lex.l.  */
1212
1213 #include "bfin-aux.h"
1214 #include "opcode/bfin.h"
1215
1216 #define INIT(t)  t c_code = init_##t
1217 #define ASSIGN(x) c_code.opcode |= ((x & c_code.mask_##x)<<c_code.bits_##x)
1218 #define ASSIGN_R(x) c_code.opcode |= (((x ? (x->regno & CODE_MASK) : 0) & c_code.mask_##x)<<c_code.bits_##x)
1219
1220 #define HI(x) ((x >> 16) & 0xffff)
1221 #define LO(x) ((x      ) & 0xffff)
1222
1223 #define GROUP(x) ((x->regno & CLASS_MASK) >> 4)
1224
1225 #define GEN_OPCODE32()  \
1226         conscode (gencode (HI (c_code.opcode)), \
1227         conscode (gencode (LO (c_code.opcode)), NULL_CODE))
1228
1229 #define GEN_OPCODE16()  \
1230         conscode (gencode (c_code.opcode), NULL_CODE)
1231
1232
1233 /*  32 BIT INSTRUCTIONS.  */
1234
1235
1236 /* DSP32 instruction generation.  */
1237
1238 INSTR_T
1239 bfin_gen_dsp32mac (int op1, int MM, int mmod, int w1, int P,
1240                    int h01, int h11, int h00, int h10, int op0,
1241                    REG_T dst, REG_T src0, REG_T src1, int w0)
1242 {
1243   INIT (DSP32Mac);
1244
1245   ASSIGN (op0);
1246   ASSIGN (op1);
1247   ASSIGN (MM);
1248   ASSIGN (mmod);
1249   ASSIGN (w0);
1250   ASSIGN (w1);
1251   ASSIGN (h01);
1252   ASSIGN (h11);
1253   ASSIGN (h00);
1254   ASSIGN (h10);
1255   ASSIGN (P);
1256
1257   /* If we have full reg assignments, mask out LSB to encode
1258   single or simultaneous even/odd register moves.  */
1259   if (P)
1260     {
1261       dst->regno &= 0x06;
1262     }
1263
1264   ASSIGN_R (dst);
1265   ASSIGN_R (src0);
1266   ASSIGN_R (src1);
1267
1268   return GEN_OPCODE32 ();
1269 }
1270
1271 INSTR_T
1272 bfin_gen_dsp32mult (int op1, int MM, int mmod, int w1, int P,
1273                     int h01, int h11, int h00, int h10, int op0,
1274                     REG_T dst, REG_T src0, REG_T src1, int w0)
1275 {
1276   INIT (DSP32Mult);
1277
1278   ASSIGN (op0);
1279   ASSIGN (op1);
1280   ASSIGN (MM);
1281   ASSIGN (mmod);
1282   ASSIGN (w0);
1283   ASSIGN (w1);
1284   ASSIGN (h01);
1285   ASSIGN (h11);
1286   ASSIGN (h00);
1287   ASSIGN (h10);
1288   ASSIGN (P);
1289
1290   if (P)
1291     {
1292       dst->regno &= 0x06;
1293     }
1294
1295   ASSIGN_R (dst);
1296   ASSIGN_R (src0);
1297   ASSIGN_R (src1);
1298
1299   return GEN_OPCODE32 ();
1300 }
1301
1302 INSTR_T
1303 bfin_gen_dsp32alu (int HL, int aopcde, int aop, int s, int x,
1304               REG_T dst0, REG_T dst1, REG_T src0, REG_T src1)
1305 {
1306   INIT (DSP32Alu);
1307
1308   ASSIGN (HL);
1309   ASSIGN (aopcde);
1310   ASSIGN (aop);
1311   ASSIGN (s);
1312   ASSIGN (x);
1313   ASSIGN_R (dst0);
1314   ASSIGN_R (dst1);
1315   ASSIGN_R (src0);
1316   ASSIGN_R (src1);
1317
1318   return GEN_OPCODE32 ();
1319 }
1320
1321 INSTR_T
1322 bfin_gen_dsp32shift (int sopcde, REG_T dst0, REG_T src0,
1323                 REG_T src1, int sop, int HLs)
1324 {
1325   INIT (DSP32Shift);
1326
1327   ASSIGN (sopcde);
1328   ASSIGN (sop);
1329   ASSIGN (HLs);
1330
1331   ASSIGN_R (dst0);
1332   ASSIGN_R (src0);
1333   ASSIGN_R (src1);
1334
1335   return GEN_OPCODE32 ();
1336 }
1337
1338 INSTR_T
1339 bfin_gen_dsp32shiftimm (int sopcde, REG_T dst0, int immag,
1340                    REG_T src1, int sop, int HLs)
1341 {
1342   INIT (DSP32ShiftImm);
1343
1344   ASSIGN (sopcde);
1345   ASSIGN (sop);
1346   ASSIGN (HLs);
1347
1348   ASSIGN_R (dst0);
1349   ASSIGN (immag);
1350   ASSIGN_R (src1);
1351
1352   return GEN_OPCODE32 ();
1353 }
1354
1355 /* LOOP SETUP.  */
1356
1357 INSTR_T
1358 bfin_gen_loopsetup (Expr_Node * psoffset, REG_T c, int rop,
1359                Expr_Node * peoffset, REG_T reg)
1360 {
1361   int soffset, eoffset;
1362   INIT (LoopSetup);
1363
1364   soffset = (EXPR_VALUE (psoffset) >> 1);
1365   ASSIGN (soffset);
1366   eoffset = (EXPR_VALUE (peoffset) >> 1);
1367   ASSIGN (eoffset);
1368   ASSIGN (rop);
1369   ASSIGN_R (c);
1370   ASSIGN_R (reg);
1371
1372   return
1373       conscode (gencode (HI (c_code.opcode)),
1374                 conctcode (Expr_Node_Gen_Reloc (psoffset, BFD_RELOC_BFIN_5_PCREL),
1375                            conctcode (gencode (LO (c_code.opcode)), Expr_Node_Gen_Reloc (peoffset, BFD_RELOC_BFIN_11_PCREL))));
1376
1377 }
1378
1379 /*  Call, Link.  */
1380
1381 INSTR_T
1382 bfin_gen_calla (Expr_Node * addr, int S)
1383 {
1384   int val;
1385   int high_val;
1386   int reloc = 0;
1387   INIT (CALLa);
1388
1389   switch(S){
1390    case 0 : reloc = BFD_RELOC_BFIN_24_PCREL_JUMP_L; break;
1391    case 1 : reloc = BFD_RELOC_24_PCREL; break;
1392    case 2 : reloc = BFD_RELOC_BFIN_PLTPC; break;
1393    default : break;
1394   }
1395
1396   ASSIGN (S);
1397
1398   val = EXPR_VALUE (addr) >> 1;
1399   high_val = val >> 16;
1400
1401   return conscode (gencode (HI (c_code.opcode) | (high_val & 0xff)),
1402                      Expr_Node_Gen_Reloc (addr, reloc));
1403   }
1404
1405 INSTR_T
1406 bfin_gen_linkage (int R, int framesize)
1407 {
1408   INIT (Linkage);
1409
1410   ASSIGN (R);
1411   ASSIGN (framesize);
1412
1413   return GEN_OPCODE32 ();
1414 }
1415
1416
1417 /* Load and Store.  */
1418
1419 INSTR_T
1420 bfin_gen_ldimmhalf (REG_T reg, int H, int S, int Z, Expr_Node * phword, int reloc)
1421 {
1422   int grp, hword;
1423   unsigned val = EXPR_VALUE (phword);
1424   INIT (LDIMMhalf);
1425
1426   ASSIGN (H);
1427   ASSIGN (S);
1428   ASSIGN (Z);
1429
1430   ASSIGN_R (reg);
1431   grp = (GROUP (reg));
1432   ASSIGN (grp);
1433   if (reloc == 2)
1434     {
1435       return conscode (gencode (HI (c_code.opcode)), Expr_Node_Gen_Reloc (phword, BFD_RELOC_BFIN_16_IMM));
1436     }
1437   else if (reloc == 1)
1438     {
1439       return conscode (gencode (HI (c_code.opcode)), Expr_Node_Gen_Reloc (phword, IS_H (*reg) ? BFD_RELOC_BFIN_16_HIGH : BFD_RELOC_BFIN_16_LOW));
1440     }
1441   else
1442     {
1443       hword = val;
1444       ASSIGN (hword);
1445     }
1446   return GEN_OPCODE32 ();
1447 }
1448
1449 INSTR_T
1450 bfin_gen_ldstidxi (REG_T ptr, REG_T reg, int W, int sz, int Z, Expr_Node * poffset)
1451 {
1452   INIT (LDSTidxI);
1453
1454   if (!IS_PREG (*ptr) || (!IS_DREG (*reg) && !Z))
1455     {
1456       fprintf (stderr, "Warning: possible mixup of Preg/Dreg\n");
1457       return 0;
1458     }
1459
1460   ASSIGN_R (ptr);
1461   ASSIGN_R (reg);
1462   ASSIGN (W);
1463   ASSIGN (sz);
1464
1465   ASSIGN (Z);
1466
1467   if (poffset->type != Expr_Node_Constant)
1468     {
1469       /* a GOT relocation such as R0 = [P5 + symbol@GOT] */
1470       /* distinguish between R0 = [P5 + symbol@GOT] and
1471          P5 = [P5 + _current_shared_library_p5_offset_]
1472       */
1473       if (poffset->type == Expr_Node_Reloc
1474           && !strcmp (poffset->value.s_value,
1475                       "_current_shared_library_p5_offset_"))
1476         {
1477           return  conscode (gencode (HI (c_code.opcode)),
1478                             Expr_Node_Gen_Reloc(poffset, BFD_RELOC_16));
1479         }
1480       else if (poffset->type != Expr_Node_GOT_Reloc)
1481         abort ();
1482
1483       return conscode (gencode (HI (c_code.opcode)),
1484                        Expr_Node_Gen_Reloc(poffset->Left_Child,
1485                                            poffset->value.i_value));
1486     }
1487   else
1488     {
1489       int value, offset;
1490       switch (sz)
1491         {                               // load/store access size
1492         case 0:                 // 32 bit
1493           value = EXPR_VALUE (poffset) >> 2;
1494           break;
1495         case 1:                 // 16 bit
1496           value = EXPR_VALUE (poffset) >> 1;
1497           break;
1498         case 2:                 // 8 bit
1499           value = EXPR_VALUE (poffset);
1500           break;
1501         default:
1502           abort ();
1503         }
1504
1505       offset = (value & 0xffff);
1506       ASSIGN (offset);
1507       return GEN_OPCODE32 ();
1508     }
1509 }
1510
1511
1512 INSTR_T
1513 bfin_gen_ldst (REG_T ptr, REG_T reg, int aop, int sz, int Z, int W)
1514 {
1515   INIT (LDST);
1516
1517   if (!IS_PREG (*ptr) || (!IS_DREG (*reg) && !Z))
1518     {
1519       fprintf (stderr, "Warning: possible mixup of Preg/Dreg\n");
1520       return 0;
1521     }
1522
1523   ASSIGN_R (ptr);
1524   ASSIGN_R (reg);
1525   ASSIGN (aop);
1526   ASSIGN (sz);
1527   ASSIGN (Z);
1528   ASSIGN (W);
1529
1530   return GEN_OPCODE16 ();
1531 }
1532
1533 INSTR_T
1534 bfin_gen_ldstii (REG_T ptr, REG_T reg, Expr_Node * poffset, int W, int op)
1535 {
1536   int offset;
1537   int value = 0;
1538   INIT (LDSTii);
1539
1540
1541   if (!IS_PREG (*ptr))
1542     {
1543       fprintf (stderr, "Warning: possible mixup of Preg/Dreg\n");
1544       return 0;
1545     }
1546
1547   switch (op)
1548     {
1549     case 1:
1550     case 2:
1551       value = EXPR_VALUE (poffset) >> 1;
1552       break;
1553     case 0:
1554     case 3:
1555       value = EXPR_VALUE (poffset) >> 2;
1556       break;
1557     }
1558
1559   ASSIGN_R (ptr);
1560   ASSIGN_R (reg);
1561
1562   offset = value;
1563   ASSIGN (offset);
1564   ASSIGN (W);
1565   ASSIGN (op);
1566
1567   return GEN_OPCODE16 ();
1568 }
1569
1570 INSTR_T
1571 bfin_gen_ldstiifp (REG_T sreg, Expr_Node * poffset, int W)
1572 {
1573   /* Set bit 4 if it's a Preg.  */
1574   int reg = (sreg->regno & CODE_MASK) | (IS_PREG (*sreg) ? 0x8 : 0x0);
1575   int offset = ((~(EXPR_VALUE (poffset) >> 2)) & 0x1f) + 1;
1576   INIT (LDSTiiFP);
1577   ASSIGN (reg);
1578   ASSIGN (offset);
1579   ASSIGN (W);
1580
1581   return GEN_OPCODE16 ();
1582 }
1583
1584 INSTR_T
1585 bfin_gen_ldstpmod (REG_T ptr, REG_T reg, int aop, int W, REG_T idx)
1586 {
1587   INIT (LDSTpmod);
1588
1589   ASSIGN_R (ptr);
1590   ASSIGN_R (reg);
1591   ASSIGN (aop);
1592   ASSIGN (W);
1593   ASSIGN_R (idx);
1594
1595   return GEN_OPCODE16 ();
1596 }
1597
1598 INSTR_T
1599 bfin_gen_dspldst (REG_T i, REG_T reg, int aop, int W, int m)
1600 {
1601   INIT (DspLDST);
1602
1603   ASSIGN_R (i);
1604   ASSIGN_R (reg);
1605   ASSIGN (aop);
1606   ASSIGN (W);
1607   ASSIGN (m);
1608
1609   return GEN_OPCODE16 ();
1610 }
1611
1612 INSTR_T
1613 bfin_gen_logi2op (int opc, int src, int dst)
1614 {
1615   INIT (LOGI2op);
1616
1617   ASSIGN (opc);
1618   ASSIGN (src);
1619   ASSIGN (dst);
1620
1621   return GEN_OPCODE16 ();
1622 }
1623
1624 INSTR_T
1625 bfin_gen_brcc (int T, int B, Expr_Node * poffset)
1626 {
1627   int offset;
1628   INIT (BRCC);
1629
1630   ASSIGN (T);
1631   ASSIGN (B);
1632   offset = ((EXPR_VALUE (poffset) >> 1));
1633   ASSIGN (offset);
1634   return conscode (gencode (c_code.opcode), Expr_Node_Gen_Reloc (poffset, BFD_RELOC_BFIN_10_PCREL));
1635 }
1636
1637 INSTR_T
1638 bfin_gen_ujump (Expr_Node * poffset)
1639 {
1640   int offset;
1641   INIT (UJump);
1642
1643   offset = ((EXPR_VALUE (poffset) >> 1));
1644   ASSIGN (offset);
1645
1646   return conscode (gencode (c_code.opcode),
1647                    Expr_Node_Gen_Reloc (
1648                        poffset, BFD_RELOC_BFIN_12_PCREL_JUMP_S));
1649 }
1650
1651 INSTR_T
1652 bfin_gen_alu2op (REG_T dst, REG_T src, int opc)
1653 {
1654   INIT (ALU2op);
1655
1656   ASSIGN_R (dst);
1657   ASSIGN_R (src);
1658   ASSIGN (opc);
1659
1660   return GEN_OPCODE16 ();
1661 }
1662
1663 INSTR_T
1664 bfin_gen_compi2opd (REG_T dst, int src, int op)
1665 {
1666   INIT (COMPI2opD);
1667
1668   ASSIGN_R (dst);
1669   ASSIGN (src);
1670   ASSIGN (op);
1671
1672   return GEN_OPCODE16 ();
1673 }
1674
1675 INSTR_T
1676 bfin_gen_compi2opp (REG_T dst, int src, int op)
1677 {
1678   INIT (COMPI2opP);
1679
1680   ASSIGN_R (dst);
1681   ASSIGN (src);
1682   ASSIGN (op);
1683
1684   return GEN_OPCODE16 ();
1685 }
1686
1687 INSTR_T
1688 bfin_gen_dagmodik (REG_T i, int op)
1689 {
1690   INIT (DagMODik);
1691
1692   ASSIGN_R (i);
1693   ASSIGN (op);
1694
1695   return GEN_OPCODE16 ();
1696 }
1697
1698 INSTR_T
1699 bfin_gen_dagmodim (REG_T i, REG_T m, int op, int br)
1700 {
1701   INIT (DagMODim);
1702
1703   ASSIGN_R (i);
1704   ASSIGN_R (m);
1705   ASSIGN (op);
1706   ASSIGN (br);
1707
1708   return GEN_OPCODE16 ();
1709 }
1710
1711 INSTR_T
1712 bfin_gen_ptr2op (REG_T dst, REG_T src, int opc)
1713 {
1714   INIT (PTR2op);
1715
1716   ASSIGN_R (dst);
1717   ASSIGN_R (src);
1718   ASSIGN (opc);
1719
1720   return GEN_OPCODE16 ();
1721 }
1722
1723 INSTR_T
1724 bfin_gen_comp3op (REG_T src0, REG_T src1, REG_T dst, int opc)
1725 {
1726   INIT (COMP3op);
1727
1728   ASSIGN_R (src0);
1729   ASSIGN_R (src1);
1730   ASSIGN_R (dst);
1731   ASSIGN (opc);
1732
1733   return GEN_OPCODE16 ();
1734 }
1735
1736 INSTR_T
1737 bfin_gen_ccflag (REG_T x, int y, int opc, int I, int G)
1738 {
1739   INIT (CCflag);
1740
1741   ASSIGN_R (x);
1742   ASSIGN (y);
1743   ASSIGN (opc);
1744   ASSIGN (I);
1745   ASSIGN (G);
1746
1747   return GEN_OPCODE16 ();
1748 }
1749
1750 INSTR_T
1751 bfin_gen_ccmv (REG_T src, REG_T dst, int T)
1752 {
1753   int s, d;
1754   INIT (CCmv);
1755
1756   ASSIGN_R (src);
1757   ASSIGN_R (dst);
1758   s = (GROUP (src));
1759   ASSIGN (s);
1760   d = (GROUP (dst));
1761   ASSIGN (d);
1762   ASSIGN (T);
1763
1764   return GEN_OPCODE16 ();
1765 }
1766
1767 INSTR_T
1768 bfin_gen_cc2stat (int cbit, int op, int D)
1769 {
1770   INIT (CC2stat);
1771
1772   ASSIGN (cbit);
1773   ASSIGN (op);
1774   ASSIGN (D);
1775
1776   return GEN_OPCODE16 ();
1777 }
1778
1779 INSTR_T
1780 bfin_gen_regmv (REG_T src, REG_T dst)
1781 {
1782   int gs, gd;
1783   INIT (RegMv);
1784
1785   ASSIGN_R (src);
1786   ASSIGN_R (dst);
1787
1788   gs = (GROUP (src));
1789   ASSIGN (gs);
1790   gd = (GROUP (dst));
1791   ASSIGN (gd);
1792
1793   return GEN_OPCODE16 ();
1794 }
1795
1796 INSTR_T
1797 bfin_gen_cc2dreg (int op, REG_T reg)
1798 {
1799   INIT (CC2dreg);
1800
1801   ASSIGN (op);
1802   ASSIGN_R (reg);
1803
1804   return GEN_OPCODE16 ();
1805 }
1806
1807 INSTR_T
1808 bfin_gen_progctrl (int prgfunc, int poprnd)
1809 {
1810   INIT (ProgCtrl);
1811
1812   ASSIGN (prgfunc);
1813   ASSIGN (poprnd);
1814
1815   return GEN_OPCODE16 ();
1816 }
1817
1818 INSTR_T
1819 bfin_gen_cactrl (REG_T reg, int a, int op)
1820 {
1821   INIT (CaCTRL);
1822
1823   ASSIGN_R (reg);
1824   ASSIGN (a);
1825   ASSIGN (op);
1826
1827   return GEN_OPCODE16 ();
1828 }
1829
1830 INSTR_T
1831 bfin_gen_pushpopmultiple (int dr, int pr, int d, int p, int W)
1832 {
1833   INIT (PushPopMultiple);
1834
1835   ASSIGN (dr);
1836   ASSIGN (pr);
1837   ASSIGN (d);
1838   ASSIGN (p);
1839   ASSIGN (W);
1840
1841   return GEN_OPCODE16 ();
1842 }
1843
1844 INSTR_T
1845 bfin_gen_pushpopreg (REG_T reg, int W)
1846 {
1847   int grp;
1848   INIT (PushPopReg);
1849
1850   ASSIGN_R (reg);
1851   grp = (GROUP (reg));
1852   ASSIGN (grp);
1853   ASSIGN (W);
1854
1855   return GEN_OPCODE16 ();
1856 }
1857
1858 /* Pseudo Debugging Support.  */
1859
1860 INSTR_T
1861 bfin_gen_pseudodbg (int fn, int reg, int grp)
1862 {
1863   INIT (PseudoDbg);
1864
1865   ASSIGN (fn);
1866   ASSIGN (reg);
1867   ASSIGN (grp);
1868
1869   return GEN_OPCODE16 ();
1870 }
1871
1872 INSTR_T
1873 bfin_gen_pseudodbg_assert (int dbgop, REG_T regtest, int expected)
1874 {
1875   INIT (PseudoDbg_Assert);
1876
1877   ASSIGN (dbgop);
1878   ASSIGN_R (regtest);
1879   ASSIGN (expected);
1880
1881   return GEN_OPCODE32 ();
1882 }
1883
1884 /* Multiple instruction generation.  */
1885
1886 INSTR_T
1887 bfin_gen_multi_instr (INSTR_T dsp32, INSTR_T dsp16_grp1, INSTR_T dsp16_grp2)
1888 {
1889   INSTR_T walk;
1890
1891   /* If it's a 0, convert into MNOP. */
1892   if (dsp32)
1893     {
1894       walk = dsp32->next;
1895       SET_MULTI_INSTRUCTION_BIT (dsp32);
1896     }
1897   else
1898     {
1899       dsp32 = gencode (0xc803);
1900       walk = gencode (0x1800);
1901       dsp32->next = walk;
1902     }
1903
1904   if (!dsp16_grp1)
1905     {
1906       dsp16_grp1 = gencode (0x0000);
1907     }
1908
1909   if (!dsp16_grp2)
1910     {
1911       dsp16_grp2 = gencode (0x0000);
1912     }
1913
1914   walk->next = dsp16_grp1;
1915   dsp16_grp1->next = dsp16_grp2;
1916   dsp16_grp2->next = NULL_CODE;
1917
1918   return dsp32;
1919 }
1920
1921 INSTR_T
1922 bfin_gen_loop (Expr_Node *expr, REG_T reg, int rop, REG_T preg)
1923 {
1924   const char *loopsym;
1925   char *lbeginsym, *lendsym;
1926   Expr_Node_Value lbeginval, lendval;
1927   Expr_Node *lbegin, *lend;
1928
1929   loopsym = expr->value.s_value;
1930   lbeginsym = (char *) xmalloc (strlen (loopsym) + strlen ("__BEGIN") + 1);
1931   lendsym = (char *) xmalloc (strlen (loopsym) + strlen ("__END") + 1);
1932
1933   lbeginsym[0] = 0;
1934   lendsym[0] = 0;
1935
1936   strcat (lbeginsym, loopsym);
1937   strcat (lbeginsym, "__BEGIN");
1938
1939   strcat (lendsym, loopsym);
1940   strcat (lendsym, "__END");
1941
1942   lbeginval.s_value = lbeginsym;
1943   lendval.s_value = lendsym;
1944
1945   lbegin = Expr_Node_Create (Expr_Node_Reloc, lbeginval, NULL, NULL);
1946   lend   = Expr_Node_Create (Expr_Node_Reloc, lendval, NULL, NULL);
1947   return bfin_gen_loopsetup(lbegin, reg, rop, lend, preg);
1948 }
1949
1950 bfd_boolean
1951 bfin_eol_in_insn (char *line)
1952 {
1953    /* Allow a new-line to appear in the middle of a multi-issue instruction.  */
1954
1955    char *temp = line;
1956
1957   if (*line != '\n')
1958     return FALSE;
1959
1960   /* A semi-colon followed by a newline is always the end of a line.  */
1961   if (line[-1] == ';')
1962     return FALSE;
1963
1964   if (line[-1] == '|')
1965     return TRUE;
1966
1967   /* If the || is on the next line, there might be leading whitespace.  */
1968   temp++;
1969   while (*temp == ' ' || *temp == '\t') temp++;
1970
1971   if (*temp == '|')
1972     return TRUE;
1973
1974   return FALSE;
1975 }
1976
1977 bfd_boolean
1978 bfin_start_label (char *ptr)
1979 {
1980   ptr--;
1981   while (!ISSPACE (*ptr) && !is_end_of_line[(unsigned char) *ptr])
1982     ptr--;
1983
1984   ptr++;
1985   if (*ptr == '(' || *ptr == '[')
1986     return FALSE;
1987
1988   return TRUE;
1989 }
1990
1991 int
1992 bfin_force_relocation (struct fix *fixp)
1993 {
1994   if (fixp->fx_r_type ==BFD_RELOC_BFIN_16_LOW
1995       || fixp->fx_r_type == BFD_RELOC_BFIN_16_HIGH)
1996     return TRUE;
1997
1998   return generic_force_reloc (fixp);
1999 }