gas/config/tc-spu.c

   1 /* spu.c -- Assembler for the IBM Synergistic Processing Unit (SPU)
   2
   3    Copyright 2006, 2007 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 3, 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 "safe-ctype.h"
  24 #include "subsegs.h"
  25 #include "dwarf2dbg.h"
  26
  27 const struct spu_opcode spu_opcodes[] = {
  28 #define APUOP(TAG,MACFORMAT,OPCODE,MNEMONIC,ASMFORMAT,DEP,PIPE) \
  29         { MACFORMAT, (OPCODE) << (32-11), MNEMONIC, ASMFORMAT },
  30 #define APUOPFB(TAG,MACFORMAT,OPCODE,FB,MNEMONIC,ASMFORMAT,DEP,PIPE) \
  31         { MACFORMAT, ((OPCODE) << (32-11)) | ((FB) << (32-18)), MNEMONIC, ASMFORMAT },
  32 #include "opcode/spu-insns.h"
  33 #undef APUOP
  34 #undef APUOPFB
  35 };
  36
  37 static const int spu_num_opcodes =
  38   sizeof (spu_opcodes) / sizeof (spu_opcodes[0]);
  39
  40 #define MAX_RELOCS 2
  41
  42 struct spu_insn
  43 {
  44   unsigned int opcode;
  45   expressionS exp[MAX_RELOCS];
  46   int reloc_arg[MAX_RELOCS];
  47   bfd_reloc_code_real_type reloc[MAX_RELOCS];
  48   enum spu_insns tag;
  49 };
  50
  51 static const char *get_imm (const char *param, struct spu_insn *insn, int arg);
  52 static const char *get_reg (const char *param, struct spu_insn *insn, int arg,
  53                             int accept_expr);
  54 static int calcop (struct spu_opcode *format, const char *param,
  55                    struct spu_insn *insn);
  56 static void spu_cons (int);
  57
  58 extern char *myname;
  59 static struct hash_control *op_hash = NULL;
  60
  61 /* These bits should be turned off in the first address of every segment */
  62 int md_seg_align = 7;
  63
  64 /* These chars start a comment anywhere in a source file (except inside
  65    another comment */
  66 const char comment_chars[] = "#";
  67
  68 /* These chars only start a comment at the beginning of a line.  */
  69 const char line_comment_chars[] = "#";
  70
  71 /* gods own line continuation char */
  72 const char line_separator_chars[] = ";";
  73
  74 /* Chars that can be used to separate mant from exp in floating point nums */
  75 const char EXP_CHARS[] = "eE";
  76
  77 /* Chars that mean this number is a floating point constant */
  78 /* as in 0f123.456 */
  79 /* or    0H1.234E-12 (see exp chars above) */
  80 const char FLT_CHARS[] = "dDfF";
  81
  82 const pseudo_typeS md_pseudo_table[] =
  83 {
  84   {"align", s_align_ptwo, 4},
  85   {"bss", s_lcomm_bytes, 1},
  86   {"def", s_set, 0},
  87   {"dfloat", float_cons, 'd'},
  88   {"ffloat", float_cons, 'f'},
  89   {"global", s_globl, 0},
  90   {"half", cons, 2},
  91   {"int", spu_cons, 4},
  92   {"long", spu_cons, 4},
  93   {"quad", spu_cons, 8},
  94   {"string", stringer, 8 + 1},
  95   {"word", spu_cons, 4},
  96   /* Force set to be treated as an instruction.  */
  97   {"set", NULL, 0},
  98   {".set", s_set, 0},
  99   /* Likewise for eqv.  */
 100   {"eqv", NULL, 0},
 101   {".eqv", s_set, -1},
 102   {"file", (void (*) PARAMS ((int))) dwarf2_directive_file, 0 },
 103   {"loc", dwarf2_directive_loc, 0},
 104   {0,0,0}
 105 };
 106
 107 void
 108 md_begin (void)
 109 {
 110   const char *retval = NULL;
 111   int i;
 112
 113   /* initialize hash table */
 114
 115   op_hash = hash_new ();
 116
 117   /* loop until you see the end of the list */
 118
 119   for (i = 0; i < spu_num_opcodes; i++)
 120     {
 121       /* hash each mnemonic and record its position */
 122
 123       retval = hash_insert (op_hash, spu_opcodes[i].mnemonic, (PTR)&spu_opcodes[i]);
 124
 125       if (retval != NULL && strcmp (retval, "exists") != 0)
 126         as_fatal (_("Can't hash instruction '%s':%s"),
 127                   spu_opcodes[i].mnemonic, retval);
 128     }
 129 }
 130 \f
 131 const char *md_shortopts = "";
 132 struct option md_longopts[] = {
 133 #define OPTION_APUASM (OPTION_MD_BASE)
 134   {"apuasm", no_argument, NULL, OPTION_APUASM},
 135 #define OPTION_DD2 (OPTION_MD_BASE+1)
 136   {"mdd2.0", no_argument, NULL, OPTION_DD2},
 137 #define OPTION_DD1 (OPTION_MD_BASE+2)
 138   {"mdd1.0", no_argument, NULL, OPTION_DD1},
 139 #define OPTION_DD3 (OPTION_MD_BASE+3)
 140   {"mdd3.0", no_argument, NULL, OPTION_DD3},
 141   { NULL, no_argument, NULL, 0 }
 142 };
 143 size_t md_longopts_size = sizeof (md_longopts);
 144
 145 /* When set (by -apuasm) our assembler emulates the behaviour of apuasm.
 146  * e.g. don't add bias to float conversion and don't right shift
 147  * immediate values. */
 148 static int emulate_apuasm;
 149
 150 /* Use the dd2.0 instructions set.  The only differences are some new
 151  * register names and the orx insn */
 152 static int use_dd2 = 1;
 153
 154 int
 155 md_parse_option (int c, char *arg ATTRIBUTE_UNUSED)
 156 {
 157   switch (c)
 158     {
 159     case OPTION_APUASM:
 160       emulate_apuasm = 1;
 161       break;
 162     case OPTION_DD3:
 163       use_dd2 = 1;
 164       break;
 165     case OPTION_DD2:
 166       use_dd2 = 1;
 167       break;
 168     case OPTION_DD1:
 169       use_dd2 = 0;
 170       break;
 171     default:
 172       return 0;
 173     }
 174   return 1;
 175 }
 176
 177 void
 178 md_show_usage (FILE *stream)
 179 {
 180   fputs (_("\
 181 SPU options:\n\
 182   --apuasm                emulate behaviour of apuasm\n"),
 183         stream);
 184 }
 185 \f
 186
 187 struct arg_encode {
 188   int size;
 189   int pos;
 190   int rshift;
 191   int lo, hi;
 192   int wlo, whi;
 193   bfd_reloc_code_real_type reloc;
 194 };
 195
 196 static struct arg_encode arg_encode[A_MAX] = {
 197   {  7,  0, 0,       0,    127,    0,   -1,  0 }, /* A_T */
 198   {  7,  7, 0,       0,    127,    0,   -1,  0 }, /* A_A */
 199   {  7, 14, 0,       0,    127,    0,   -1,  0 }, /* A_B */
 200   {  7, 21, 0,       0,    127,    0,   -1,  0 }, /* A_C */
 201   {  7,  7, 0,       0,    127,    0,   -1,  0 }, /* A_S */
 202   {  7,  7, 0,       0,    127,    0,   -1,  0 }, /* A_H */
 203   {  0,  0, 0,       0,     -1,    0,   -1,  0 }, /* A_P */
 204   {  7, 14, 0,       0,     -1,    0,   -1,  BFD_RELOC_SPU_IMM7 }, /* A_S3 */
 205   {  7, 14, 0,     -32,     31,  -31,    0,  BFD_RELOC_SPU_IMM7 }, /* A_S6 */
 206   {  7, 14, 0,       0,     -1,    0,   -1,  BFD_RELOC_SPU_IMM7 }, /* A_S7N */
 207   {  7, 14, 0,     -64,     63,  -63,    0,  BFD_RELOC_SPU_IMM7 }, /* A_S7 */
 208   {  8, 14, 0,       0,    127,    0,   -1,  BFD_RELOC_SPU_IMM8 }, /* A_U7A */
 209   {  8, 14, 0,       0,    127,    0,   -1,  BFD_RELOC_SPU_IMM8 }, /* A_U7B */
 210   { 10, 14, 0,    -512,    511, -128,  255,  BFD_RELOC_SPU_IMM10 }, /* A_S10B */
 211   { 10, 14, 0,    -512,    511,    0,   -1,  BFD_RELOC_SPU_IMM10 }, /* A_S10 */
 212   {  2, 23, 9,   -1024,   1023,    0,   -1,  BFD_RELOC_SPU_PCREL9a }, /* A_S11 */
 213   {  2, 14, 9,   -1024,   1023,    0,   -1,  BFD_RELOC_SPU_PCREL9b }, /* A_S11I */
 214   { 10, 14, 4,   -8192,   8191,    0,   -1,  BFD_RELOC_SPU_IMM10W }, /* A_S14 */
 215   { 16,  7, 0,  -32768,  32767,    0,   -1,  BFD_RELOC_SPU_IMM16 }, /* A_S16 */
 216   { 16,  7, 2, -131072, 262143,    0,   -1,  BFD_RELOC_SPU_IMM16W }, /* A_S18 */
 217   { 16,  7, 2, -262144, 262143,    0,   -1,  BFD_RELOC_SPU_PCREL16 }, /* A_R18 */
 218   {  7, 14, 0,       0,     -1,    0,   -1,  BFD_RELOC_SPU_IMM7 }, /* A_U3 */
 219   {  7, 14, 0,       0,    127,    0,   31,  BFD_RELOC_SPU_IMM7 }, /* A_U5 */
 220   {  7, 14, 0,       0,    127,    0,   63,  BFD_RELOC_SPU_IMM7 }, /* A_U6 */
 221   {  7, 14, 0,       0,     -1,    0,   -1,  BFD_RELOC_SPU_IMM7 }, /* A_U7 */
 222   { 14,  0, 0,       0,  16383,    0,   -1,  0 }, /* A_U14 */
 223   { 16,  7, 0,  -32768,  65535,    0,   -1,  BFD_RELOC_SPU_IMM16 }, /* A_X16 */
 224   { 18,  7, 0,       0, 262143,    0,   -1,  BFD_RELOC_SPU_IMM18 }, /* A_U18 */
 225 };
 226
 227 /* Some flags for handling errors.  This is very hackish and added after
 228  * the fact. */
 229 static int syntax_error_arg;
 230 static const char *syntax_error_param;
 231 static int syntax_reg;
 232
 233 static char *
 234 insn_fmt_string (struct spu_opcode *format)
 235 {
 236   static char buf[64];
 237   int len = 0;
 238   int i;
 239
 240   len += sprintf (&buf[len], "%s\t", format->mnemonic);
 241   for (i = 1; i <= format->arg[0]; i++)
 242     {
 243       int arg = format->arg[i];
 244       char *exp;
 245       if (i > 1 && arg != A_P && format->arg[i-1] != A_P)
 246         buf[len++] =  ',';
 247       if (arg == A_P)
 248         exp = "(";
 249       else if (arg < A_P)
 250         exp = i == syntax_error_arg ? "REG" : "reg";
 251       else
 252         exp = i == syntax_error_arg ? "IMM" : "imm";
 253       len += sprintf (&buf[len], "%s", exp);
 254       if (i > 1 && format->arg[i-1] == A_P)
 255         buf[len++] =  ')';
 256     }
 257   buf[len] = 0;
 258   return buf;
 259 }
 260
 261 void
 262 md_assemble (char *op)
 263 {
 264   char *param, *thisfrag;
 265   char c;
 266   struct spu_opcode *format;
 267   struct spu_insn insn;
 268   int i;
 269
 270   assert (op);
 271
 272   /* skip over instruction to find parameters */
 273
 274   for (param = op; *param != 0 && !ISSPACE (*param); param++)
 275     ;
 276   c = *param;
 277   *param = 0;
 278
 279   if (c != 0 && c != '\n')
 280     param++;
 281
 282   /* try to find the instruction in the hash table */
 283
 284   if ((format = (struct spu_opcode *) hash_find (op_hash, op)) == NULL)
 285     {
 286       as_bad (_("Invalid mnemonic '%s'"), op);
 287       return;
 288     }
 289
 290   if (!use_dd2 && strcmp (format->mnemonic, "orx") == 0)
 291     {
 292       as_bad (_("'%s' is only available in DD2.0 or higher."), op);
 293       return;
 294     }
 295
 296   while (1)
 297     {
 298       /* try parsing this instruction into insn */
 299       for (i = 0; i < MAX_RELOCS; i++)
 300         {
 301           insn.exp[i].X_add_symbol = 0;
 302           insn.exp[i].X_op_symbol = 0;
 303           insn.exp[i].X_add_number = 0;
 304           insn.exp[i].X_op = O_illegal;
 305           insn.reloc_arg[i] = -1;
 306           insn.reloc[i] = BFD_RELOC_NONE;
 307         }
 308       insn.opcode = format->opcode;
 309       insn.tag = (enum spu_insns) (format - spu_opcodes);
 310
 311       syntax_error_arg = 0;
 312       syntax_error_param = 0;
 313       syntax_reg = 0;
 314       if (calcop (format, param, &insn))
 315         break;
 316
 317       /* if it doesn't parse try the next instruction */
 318       if (!strcmp (format[0].mnemonic, format[1].mnemonic))
 319         format++;
 320       else
 321         {
 322           int parg = format[0].arg[syntax_error_arg-1];
 323
 324           as_fatal (_("Error in argument %d.  Expecting:  \"%s\""),
 325                     syntax_error_arg - (parg == A_P),
 326                     insn_fmt_string (format));
 327           return;
 328         }
 329     }
 330
 331   if ((syntax_reg & 4)
 332       && ! (insn.tag == M_RDCH
 333             || insn.tag == M_RCHCNT
 334             || insn.tag == M_WRCH))
 335     as_warn (_("Mixing register syntax, with and without '$'."));
 336   if (syntax_error_param)
 337     {
 338       const char *d = syntax_error_param;
 339       while (*d != '$')
 340         d--;
 341       as_warn (_("Treating '%-*s' as a symbol."), (int)(syntax_error_param - d), d);
 342     }
 343
 344   /* grow the current frag and plop in the opcode */
 345
 346   thisfrag = frag_more (4);
 347   md_number_to_chars (thisfrag, insn.opcode, 4);
 348
 349   /* if this instruction requires labels mark it for later */
 350
 351   for (i = 0; i < MAX_RELOCS; i++)
 352     if (insn.reloc_arg[i] >= 0)
 353       {
 354         fixS *fixP;
 355         bfd_reloc_code_real_type reloc = insn.reloc[i];
 356         int pcrel = 0;
 357
 358         if (reloc == BFD_RELOC_SPU_PCREL9a
 359             || reloc == BFD_RELOC_SPU_PCREL9b
 360             || reloc == BFD_RELOC_SPU_PCREL16)
 361           pcrel = 1;
 362         fixP = fix_new_exp (frag_now,
 363                             thisfrag - frag_now->fr_literal,
 364                             4,
 365                             &insn.exp[i],
 366                             pcrel,
 367                             reloc);
 368         fixP->tc_fix_data.arg_format = insn.reloc_arg[i];
 369         fixP->tc_fix_data.insn_tag = insn.tag;
 370       }
 371   dwarf2_emit_insn (4);
 372 }
 373
 374 static int
 375 calcop (struct spu_opcode *format, const char *param, struct spu_insn *insn)
 376 {
 377   int i;
 378   int paren = 0;
 379   int arg;
 380
 381   for (i = 1; i <= format->arg[0]; i++)
 382     {
 383       arg = format->arg[i];
 384       syntax_error_arg = i;
 385
 386       while (ISSPACE (*param))
 387         param++;
 388       if (*param == 0 || *param == ',')
 389         return 0;
 390       if (arg < A_P)
 391         param = get_reg (param, insn, arg, 1);
 392       else if (arg > A_P)
 393         param = get_imm (param, insn, arg);
 394       else if (arg == A_P)
 395         {
 396           paren++;
 397           if ('(' != *param++)
 398             return 0;
 399         }
 400
 401       if (!param)
 402         return 0;
 403
 404       while (ISSPACE (*param))
 405         param++;
 406
 407       if (arg != A_P && paren)
 408         {
 409           paren--;
 410           if (')' != *param++)
 411             return 0;
 412         }
 413       else if (i < format->arg[0]
 414                && format->arg[i] != A_P
 415                && format->arg[i+1] != A_P)
 416         {
 417           if (',' != *param++)
 418             {
 419               syntax_error_arg++;
 420               return 0;
 421             }
 422         }
 423     }
 424   while (ISSPACE (*param))
 425     param++;
 426   return !paren && (*param == 0 || *param == '\n');
 427 }
 428
 429 struct reg_name {
 430     unsigned int regno;
 431     unsigned int length;
 432     char name[32];
 433 };
 434
 435 #define REG_NAME(NO,NM) { NO, sizeof (NM) - 1, NM }
 436
 437 static struct reg_name reg_name[] = {
 438   REG_NAME (0, "lr"),  /* link register */
 439   REG_NAME (1, "sp"),  /* stack pointer */
 440   REG_NAME (0, "rp"),  /* link register */
 441   REG_NAME (127, "fp"),  /* frame pointer */
 442 };
 443
 444 static struct reg_name sp_reg_name[] = {
 445 };
 446
 447 static struct reg_name ch_reg_name[] = {
 448   REG_NAME (  0, "SPU_RdEventStat"),
 449   REG_NAME (  1, "SPU_WrEventMask"),
 450   REG_NAME (  2, "SPU_WrEventAck"),
 451   REG_NAME (  3, "SPU_RdSigNotify1"),
 452   REG_NAME (  4, "SPU_RdSigNotify2"),
 453   REG_NAME (  7, "SPU_WrDec"),
 454   REG_NAME (  8, "SPU_RdDec"),
 455   REG_NAME ( 11, "SPU_RdEventMask"), /* DD2.0 only */
 456   REG_NAME ( 13, "SPU_RdMachStat"),
 457   REG_NAME ( 14, "SPU_WrSRR0"),
 458   REG_NAME ( 15, "SPU_RdSRR0"),
 459   REG_NAME ( 28, "SPU_WrOutMbox"),
 460   REG_NAME ( 29, "SPU_RdInMbox"),
 461   REG_NAME ( 30, "SPU_WrOutIntrMbox"),
 462   REG_NAME (  9, "MFC_WrMSSyncReq"),
 463   REG_NAME ( 12, "MFC_RdTagMask"),   /* DD2.0 only */
 464   REG_NAME ( 16, "MFC_LSA"),
 465   REG_NAME ( 17, "MFC_EAH"),
 466   REG_NAME ( 18, "MFC_EAL"),
 467   REG_NAME ( 19, "MFC_Size"),
 468   REG_NAME ( 20, "MFC_TagID"),
 469   REG_NAME ( 21, "MFC_Cmd"),
 470   REG_NAME ( 22, "MFC_WrTagMask"),
 471   REG_NAME ( 23, "MFC_WrTagUpdate"),
 472   REG_NAME ( 24, "MFC_RdTagStat"),
 473   REG_NAME ( 25, "MFC_RdListStallStat"),
 474   REG_NAME ( 26, "MFC_WrListStallAck"),
 475   REG_NAME ( 27, "MFC_RdAtomicStat"),
 476 };
 477 #undef REG_NAME
 478
 479 static const char *
 480 get_reg (const char *param, struct spu_insn *insn, int arg, int accept_expr)
 481 {
 482   unsigned regno;
 483   int saw_prefix = 0;
 484
 485   if (*param == '$')
 486     {
 487       saw_prefix = 1;
 488       param++;
 489     }
 490
 491   if (arg == A_H) /* Channel */
 492     {
 493       if ((param[0] == 'c' || param[0] == 'C')
 494           && (param[1] == 'h' || param[1] == 'H')
 495           && ISDIGIT (param[2]))
 496         param += 2;
 497     }
 498   else if (arg == A_S) /* Special purpose register */
 499     {
 500       if ((param[0] == 's' || param[0] == 'S')
 501           && (param[1] == 'p' || param[1] == 'P')
 502           && ISDIGIT (param[2]))
 503         param += 2;
 504     }
 505
 506   if (ISDIGIT (*param))
 507     {
 508       regno = 0;
 509       while (ISDIGIT (*param))
 510         regno = regno * 10 + *param++ - '0';
 511     }
 512   else
 513     {
 514       struct reg_name *rn;
 515       unsigned int i, n, l = 0;
 516
 517       if (arg == A_H) /* Channel */
 518         {
 519           rn = ch_reg_name;
 520           n = sizeof (ch_reg_name) / sizeof (*ch_reg_name);
 521         }
 522       else if (arg == A_S) /* Special purpose register */
 523         {
 524           rn = sp_reg_name;
 525           n = sizeof (sp_reg_name) / sizeof (*sp_reg_name);
 526         }
 527       else
 528         {
 529           rn = reg_name;
 530           n = sizeof (reg_name) / sizeof (*reg_name);
 531         }
 532       regno = 128;
 533       for (i = 0; i < n; i++)
 534         if (rn[i].length > l
 535             && 0 == strncasecmp (param, rn[i].name, rn[i].length))
 536           {
 537             l = rn[i].length;
 538             regno = rn[i].regno;
 539           }
 540       param += l;
 541     }
 542
 543   if (!use_dd2
 544       && arg == A_H)
 545     {
 546       if (regno == 11)
 547         as_bad (_("'SPU_RdEventMask' (channel 11) is only available in DD2.0 or higher."));
 548       else if (regno == 12)
 549         as_bad (_("'MFC_RdTagMask' (channel 12) is only available in DD2.0 or higher."));
 550     }
 551
 552   if (regno < 128)
 553     {
 554       insn->opcode |= regno << arg_encode[arg].pos;
 555       if ((!saw_prefix && syntax_reg == 1)
 556           || (saw_prefix && syntax_reg == 2))
 557         syntax_reg |= 4;
 558       syntax_reg |= saw_prefix ? 1 : 2;
 559       return param;
 560     }
 561
 562   if (accept_expr)
 563     {
 564       char *save_ptr;
 565       expressionS ex;
 566       save_ptr = input_line_pointer;
 567       input_line_pointer = (char *)param;
 568       expression (&ex);
 569       param = input_line_pointer;
 570       input_line_pointer = save_ptr;
 571       if (ex.X_op == O_register || ex.X_op == O_constant)
 572         {
 573           insn->opcode |= ex.X_add_number << arg_encode[arg].pos;
 574           return param;
 575         }
 576     }
 577   return 0;
 578 }
 579
 580 static const char *
 581 get_imm (const char *param, struct spu_insn *insn, int arg)
 582 {
 583   int val;
 584   char *save_ptr;
 585   int low = 0, high = 0;
 586   int reloc_i = insn->reloc_arg[0] >= 0 ? 1 : 0;
 587
 588   if (strncasecmp (param, "%lo(", 4) == 0)
 589     {
 590       param += 3;
 591       low = 1;
 592       as_warn (_("Using old style, %%lo(expr), please change to PPC style, expr@l."));
 593     }
 594   else if (strncasecmp (param, "%hi(", 4) == 0)
 595     {
 596       param += 3;
 597       high = 1;
 598       as_warn (_("Using old style, %%hi(expr), please change to PPC style, expr@h."));
 599     }
 600   else if (strncasecmp (param, "%pic(", 5) == 0)
 601     {
 602       /* Currently we expect %pic(expr) == expr, so do nothing here.
 603          i.e. for code loaded at address 0 $toc will be 0.  */
 604       param += 4;
 605     }
 606
 607   if (*param == '$')
 608     {
 609       /* Symbols can start with $, but if this symbol matches a register
 610          name, it's probably a mistake.  The only way to avoid this
 611          warning is to rename the symbol.  */
 612       struct spu_insn tmp_insn;
 613       const char *np = get_reg (param, &tmp_insn, arg, 0);
 614
 615       if (np)
 616         syntax_error_param = np;
 617     }
 618
 619   save_ptr = input_line_pointer;
 620   input_line_pointer = (char *) param;
 621   expression (&insn->exp[reloc_i]);
 622   param = input_line_pointer;
 623   input_line_pointer = save_ptr;
 624
 625   /* Similar to ppc_elf_suffix in tc-ppc.c.  We have so few cases to
 626      handle we do it inlined here. */
 627   if (param[0] == '@' && !ISALNUM (param[2]) && param[2] != '@')
 628     {
 629       if (param[1] == 'h' || param[1] == 'H')
 630         {
 631           high = 1;
 632           param += 2;
 633         }
 634       else if (param[1] == 'l' || param[1] == 'L')
 635         {
 636           low = 1;
 637           param += 2;
 638         }
 639     }
 640
 641   if (insn->exp[reloc_i].X_op == O_constant)
 642     {
 643       val = insn->exp[reloc_i].X_add_number;
 644
 645       if (emulate_apuasm)
 646         {
 647           /* Convert the value to a format we expect. */
 648           val <<= arg_encode[arg].rshift;
 649           if (arg == A_U7A)
 650             val = 173 - val;
 651           else if (arg == A_U7B)
 652             val = 155 - val;
 653         }
 654
 655       if (high)
 656         val = val >> 16;
 657       else if (low)
 658         val = val & 0xffff;
 659
 660       /* Warn about out of range expressions. */
 661       {
 662         int hi = arg_encode[arg].hi;
 663         int lo = arg_encode[arg].lo;
 664         int whi = arg_encode[arg].whi;
 665         int wlo = arg_encode[arg].wlo;
 666
 667         if (hi > lo && (val < lo || val > hi))
 668           as_fatal (_("Constant expression %d out of range, [%d, %d]."),
 669                     val, lo, hi);
 670         else if (whi > wlo && (val < wlo || val > whi))
 671           as_warn (_("Constant expression %d out of range, [%d, %d]."),
 672                    val, wlo, whi);
 673       }
 674
 675       if (arg == A_U7A)
 676         val = 173 - val;
 677       else if (arg == A_U7B)
 678         val = 155 - val;
 679
 680       /* Branch hints have a split encoding.  Do the bottom part. */
 681       if (arg == A_S11 || arg == A_S11I)
 682         insn->opcode |= ((val >> 2) & 0x7f);
 683
 684       insn->opcode |= (((val >> arg_encode[arg].rshift)
 685                         & ((1 << arg_encode[arg].size) - 1))
 686                        << arg_encode[arg].pos);
 687     }
 688   else
 689     {
 690       insn->reloc_arg[reloc_i] = arg;
 691       if (high)
 692         insn->reloc[reloc_i] = BFD_RELOC_SPU_HI16;
 693       else if (low)
 694         insn->reloc[reloc_i] = BFD_RELOC_SPU_LO16;
 695       else
 696         insn->reloc[reloc_i] = arg_encode[arg].reloc;
 697     }
 698
 699   return param;
 700 }
 701
 702 #define MAX_LITTLENUMS 6
 703
 704 /* Turn a string in input_line_pointer into a floating point constant of type
 705    type, and store the appropriate bytes in *litP.  The number of LITTLENUMS
 706    emitted is stored in *sizeP .  An error message is returned, or NULL on OK.
 707  */
 708 char *
 709 md_atof (int type, char *litP, int *sizeP)
 710 {
 711   int prec;
 712   LITTLENUM_TYPE words[MAX_LITTLENUMS];
 713   LITTLENUM_TYPE *wordP;
 714   char *t;
 715
 716   switch (type)
 717     {
 718     case 'f':
 719     case 'F':
 720     case 's':
 721     case 'S':
 722       prec = 2;
 723       break;
 724
 725     case 'd':
 726     case 'D':
 727     case 'r':
 728     case 'R':
 729       prec = 4;
 730       break;
 731
 732     case 'x':
 733     case 'X':
 734       prec = 6;
 735       break;
 736
 737     case 'p':
 738     case 'P':
 739       prec = 6;
 740       break;
 741
 742     default:
 743       *sizeP = 0;
 744       return _("Bad call to MD_ATOF()");
 745     }
 746   t = atof_ieee (input_line_pointer, type, words);
 747   if (t)
 748     input_line_pointer = t;
 749
 750   *sizeP = prec * sizeof (LITTLENUM_TYPE);
 751   for (wordP = words; prec--;)
 752     {
 753       md_number_to_chars (litP, (long) (*wordP++), sizeof (LITTLENUM_TYPE));
 754       litP += sizeof (LITTLENUM_TYPE);
 755     }
 756   return 0;
 757 }
 758
 759 #ifndef WORKING_DOT_WORD
 760 int md_short_jump_size = 4;
 761
 762 void
 763 md_create_short_jump (char *ptr,
 764                       addressT from_addr ATTRIBUTE_UNUSED,
 765                       addressT to_addr ATTRIBUTE_UNUSED,
 766                       fragS *frag,
 767                       symbolS *to_symbol)
 768 {
 769   ptr[0] = (char) 0xc0;
 770   ptr[1] = 0x00;
 771   ptr[2] = 0x00;
 772   ptr[3] = 0x00;
 773   fix_new (frag,
 774            ptr - frag->fr_literal,
 775            4,
 776            to_symbol,
 777            (offsetT) 0,
 778            0,
 779            BFD_RELOC_SPU_PCREL16);
 780 }
 781
 782 int md_long_jump_size = 4;
 783
 784 void
 785 md_create_long_jump (char *ptr,
 786                      addressT from_addr ATTRIBUTE_UNUSED,
 787                      addressT to_addr ATTRIBUTE_UNUSED,
 788                      fragS *frag,
 789                      symbolS *to_symbol)
 790 {
 791   ptr[0] = (char) 0xc0;
 792   ptr[1] = 0x00;
 793   ptr[2] = 0x00;
 794   ptr[3] = 0x00;
 795   fix_new (frag,
 796            ptr - frag->fr_literal,
 797            4,
 798            to_symbol,
 799            (offsetT) 0,
 800            0,
 801            BFD_RELOC_SPU_PCREL16);
 802 }
 803 #endif
 804
 805 /* Support @ppu on symbols referenced in .int/.long/.word/.quad.  */
 806 static void
 807 spu_cons (int nbytes)
 808 {
 809   expressionS exp;
 810
 811   if (is_it_end_of_statement ())
 812     {
 813       demand_empty_rest_of_line ();
 814       return;
 815     }
 816
 817   do
 818     {
 819       deferred_expression (&exp);
 820       if ((exp.X_op == O_symbol
 821            || exp.X_op == O_constant)
 822           && strncasecmp (input_line_pointer, "@ppu", 4) == 0)
 823         {
 824           char *p = frag_more (nbytes);
 825           enum bfd_reloc_code_real reloc;
 826
 827           /* Check for identifier@suffix+constant.  */
 828           input_line_pointer += 4;
 829           if (*input_line_pointer == '-' || *input_line_pointer == '+')
 830             {
 831               expressionS new_exp;
 832
 833               expression (&new_exp);
 834               if (new_exp.X_op == O_constant)
 835                 exp.X_add_number += new_exp.X_add_number;
 836             }
 837
 838           reloc = nbytes == 4 ? BFD_RELOC_SPU_PPU32 : BFD_RELOC_SPU_PPU64;
 839           fix_new_exp (frag_now, p - frag_now->fr_literal, nbytes,
 840                        &exp, 0, reloc);
 841         }
 842       else
 843         emit_expr (&exp, nbytes);
 844     }
 845   while (*input_line_pointer++ == ',');
 846
 847   /* Put terminator back into stream.  */
 848   input_line_pointer--;
 849   demand_empty_rest_of_line ();
 850 }
 851
 852 int
 853 md_estimate_size_before_relax (fragS *fragP ATTRIBUTE_UNUSED,
 854                                segT segment_type ATTRIBUTE_UNUSED)
 855 {
 856   as_fatal (_("Relaxation should never occur"));
 857   return -1;
 858 }
 859
 860 /* If while processing a fixup, a reloc really needs to be created,
 861    then it is done here.  */
 862
 863 arelent *
 864 tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED, fixS *fixp)
 865 {
 866   arelent *reloc;
 867   reloc = (arelent *) xmalloc (sizeof (arelent));
 868   reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
 869   if (fixp->fx_addsy)
 870     *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
 871   else if (fixp->fx_subsy)
 872     *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_subsy);
 873   else
 874     abort ();
 875   reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
 876   reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
 877   if (reloc->howto == (reloc_howto_type *) NULL)
 878     {
 879       as_bad_where (fixp->fx_file, fixp->fx_line,
 880                     _("reloc %d not supported by object file format"),
 881                     (int) fixp->fx_r_type);
 882       return NULL;
 883     }
 884   reloc->addend = fixp->fx_addnumber;
 885   return reloc;
 886 }
 887
 888 /* Round up a section's size to the appropriate boundary.  */
 889
 890 valueT
 891 md_section_align (segT seg, valueT size)
 892 {
 893   int align = bfd_get_section_alignment (stdoutput, seg);
 894   valueT mask = ((valueT) 1 << align) - 1;
 895
 896   return (size + mask) & ~mask;
 897 }
 898
 899 /* Where a PC relative offset is calculated from.  On the spu they
 900    are calculated from the beginning of the branch instruction.  */
 901
 902 long
 903 md_pcrel_from (fixS *fixp)
 904 {
 905   return fixp->fx_frag->fr_address + fixp->fx_where;
 906 }
 907
 908 /* Fill in rs_align_code fragments.  */
 909
 910 void
 911 spu_handle_align (fragS *fragp)
 912 {
 913   static const unsigned char nop_pattern[8] = {
 914     0x40, 0x20, 0x00, 0x00, /* even nop */
 915     0x00, 0x20, 0x00, 0x00, /* odd  nop */
 916   };
 917
 918   int bytes;
 919   char *p;
 920
 921   if (fragp->fr_type != rs_align_code)
 922     return;
 923
 924   bytes = fragp->fr_next->fr_address - fragp->fr_address - fragp->fr_fix;
 925   p = fragp->fr_literal + fragp->fr_fix;
 926
 927   if (bytes & 3)
 928     {
 929       int fix = bytes & 3;
 930       memset (p, 0, fix);
 931       p += fix;
 932       bytes -= fix;
 933       fragp->fr_fix += fix;
 934     }
 935   if (bytes & 4)
 936     {
 937       memcpy (p, &nop_pattern[4], 4);
 938       p += 4;
 939       bytes -= 4;
 940       fragp->fr_fix += 4;
 941     }
 942
 943   memcpy (p, nop_pattern, 8);
 944   fragp->fr_var = 8;
 945 }
 946
 947 void
 948 md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED)
 949 {
 950   unsigned int res;
 951   valueT val = *valP;
 952   char *place = fixP->fx_where + fixP->fx_frag->fr_literal;
 953
 954   if (fixP->fx_subsy != (symbolS *) NULL)
 955     {
 956       /* We can't actually support subtracting a symbol.  */
 957       as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex"));
 958     }
 959
 960   if (fixP->fx_addsy != NULL)
 961     {
 962       if (fixP->fx_pcrel)
 963         {
 964           /* Hack around bfd_install_relocation brain damage.  */
 965           val += fixP->fx_frag->fr_address + fixP->fx_where;
 966
 967           switch (fixP->fx_r_type)
 968             {
 969             case BFD_RELOC_32:
 970               fixP->fx_r_type = BFD_RELOC_32_PCREL;
 971               break;
 972
 973             case BFD_RELOC_SPU_PCREL16:
 974             case BFD_RELOC_SPU_PCREL9a:
 975             case BFD_RELOC_SPU_PCREL9b:
 976             case BFD_RELOC_32_PCREL:
 977               break;
 978
 979             default:
 980               as_bad_where (fixP->fx_file, fixP->fx_line,
 981                             _("expression too complex"));
 982               break;
 983             }
 984         }
 985     }
 986
 987   fixP->fx_addnumber = val;
 988
 989   if (fixP->fx_r_type == BFD_RELOC_SPU_PPU32
 990       || fixP->fx_r_type == BFD_RELOC_SPU_PPU64)
 991     return;
 992
 993   if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0)
 994     {
 995       fixP->fx_done = 1;
 996       res = 0;
 997       if (fixP->tc_fix_data.arg_format > A_P)
 998         {
 999           int hi = arg_encode[fixP->tc_fix_data.arg_format].hi;
1000           int lo = arg_encode[fixP->tc_fix_data.arg_format].lo;
1001           if (hi > lo && ((offsetT) val < lo || (offsetT) val > hi))
1002             as_bad_where (fixP->fx_file, fixP->fx_line,
1003                           "Relocation doesn't fit. (relocation value = 0x%lx)",
1004                           (long) val);
1005         }
1006
1007       switch (fixP->fx_r_type)
1008         {
1009         case BFD_RELOC_8:
1010           md_number_to_chars (place, val, 1);
1011           return;
1012
1013         case BFD_RELOC_16:
1014           md_number_to_chars (place, val, 2);
1015           return;
1016
1017         case BFD_RELOC_32:
1018           md_number_to_chars (place, val, 4);
1019           return;
1020
1021         case BFD_RELOC_64:
1022           md_number_to_chars (place, val, 8);
1023           return;
1024
1025         case BFD_RELOC_SPU_IMM7:
1026           res = (val & 0x7f) << 14;
1027           break;
1028
1029         case BFD_RELOC_SPU_IMM8:
1030           res = (val & 0xff) << 14;
1031           break;
1032
1033         case BFD_RELOC_SPU_IMM10:
1034           res = (val & 0x3ff) << 14;
1035           break;
1036
1037         case BFD_RELOC_SPU_IMM10W:
1038           res = (val & 0x3ff0) << 10;
1039           break;
1040
1041         case BFD_RELOC_SPU_IMM16:
1042           res = (val & 0xffff) << 7;
1043           break;
1044
1045         case BFD_RELOC_SPU_IMM16W:
1046           res = (val & 0x3fffc) << 5;
1047           break;
1048
1049         case BFD_RELOC_SPU_IMM18:
1050           res = (val & 0x3ffff) << 7;
1051           break;
1052
1053         case BFD_RELOC_SPU_PCREL9a:
1054           res = ((val & 0x1fc) >> 2) | ((val & 0x600) << 14);
1055           break;
1056
1057         case BFD_RELOC_SPU_PCREL9b:
1058           res = ((val & 0x1fc) >> 2) | ((val & 0x600) << 5);
1059           break;
1060
1061         case BFD_RELOC_SPU_PCREL16:
1062           res = (val & 0x3fffc) << 5;
1063           break;
1064
1065         default:
1066           as_bad_where (fixP->fx_file, fixP->fx_line,
1067                         _("reloc %d not supported by object file format"),
1068                         (int) fixP->fx_r_type);
1069         }
1070
1071       if (res != 0)
1072         {
1073           place[0] |= (res >> 24) & 0xff;
1074           place[1] |= (res >> 16) & 0xff;
1075           place[2] |= (res >> 8) & 0xff;
1076           place[3] |= (res) & 0xff;
1077         }
1078     }
1079 }