gas/config/tc-spu.c

   1 /* spu.c -- Assembler for the IBM Synergistic Processing Unit (SPU)
   2
   3    Copyright (C) 2006-2023 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 ## u) << (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_brinfo (int);
  57 static void spu_cons (int);
  58
  59 extern char *myname;
  60 static htab_t op_hash = NULL;
  61
  62 /* These bits should be turned off in the first address of every segment */
  63 int md_seg_align = 7;
  64
  65 /* These chars start a comment anywhere in a source file (except inside
  66    another comment */
  67 const char comment_chars[] = "#";
  68
  69 /* These chars only start a comment at the beginning of a line.  */
  70 const char line_comment_chars[] = "#";
  71
  72 /* gods own line continuation char */
  73 const char line_separator_chars[] = ";";
  74
  75 /* Chars that can be used to separate mant from exp in floating point nums */
  76 const char EXP_CHARS[] = "eE";
  77
  78 /* Chars that mean this number is a floating point constant */
  79 /* as in 0f123.456 */
  80 /* or    0H1.234E-12 (see exp chars above) */
  81 const char FLT_CHARS[] = "dDfF";
  82
  83 const pseudo_typeS md_pseudo_table[] =
  84 {
  85   {"align", s_align_ptwo, 4},
  86   {"brinfo", spu_brinfo, 0},
  87   {"bss", s_lcomm_bytes, 1},
  88   {"def", s_set, 0},
  89   {"dfloat", float_cons, 'd'},
  90   {"ffloat", float_cons, 'f'},
  91   {"global", s_globl, 0},
  92   {"half", cons, 2},
  93   {"int", spu_cons, 4},
  94   {"long", spu_cons, 4},
  95   {"quad", spu_cons, 8},
  96   {"string", stringer, 8 + 1},
  97   {"word", spu_cons, 4},
  98   /* Force set to be treated as an instruction.  */
  99   {"set", NULL, 0},
 100   {".set", s_set, 0},
 101   /* Likewise for eqv.  */
 102   {"eqv", NULL, 0},
 103   {".eqv", s_set, -1},
 104   {0,0,0}
 105 };
 106
 107 /* Bits plugged into branch instruction offset field.  */
 108 unsigned int brinfo;
 109
 110 void
 111 md_begin (void)
 112 {
 113   int i;
 114
 115   op_hash = str_htab_create ();
 116
 117   /* Hash each mnemonic and record its position.  There are
 118      duplicates, keep just the first.  */
 119   for (i = 0; i < spu_num_opcodes; i++)
 120     str_hash_insert (op_hash, spu_opcodes[i].mnemonic, &spu_opcodes[i], 0);
 121 }
 122 \f
 123 const char *md_shortopts = "";
 124 struct option md_longopts[] = {
 125 #define OPTION_APUASM (OPTION_MD_BASE)
 126   {"apuasm", no_argument, NULL, OPTION_APUASM},
 127 #define OPTION_DD2 (OPTION_MD_BASE+1)
 128   {"mdd2.0", no_argument, NULL, OPTION_DD2},
 129 #define OPTION_DD1 (OPTION_MD_BASE+2)
 130   {"mdd1.0", no_argument, NULL, OPTION_DD1},
 131 #define OPTION_DD3 (OPTION_MD_BASE+3)
 132   {"mdd3.0", no_argument, NULL, OPTION_DD3},
 133   { NULL, no_argument, NULL, 0 }
 134 };
 135 size_t md_longopts_size = sizeof (md_longopts);
 136
 137 /* When set (by -apuasm) our assembler emulates the behaviour of apuasm.
 138  * e.g. don't add bias to float conversion and don't right shift
 139  * immediate values. */
 140 static int emulate_apuasm;
 141
 142 /* Use the dd2.0 instructions set.  The only differences are some new
 143  * register names and the orx insn */
 144 static int use_dd2 = 1;
 145
 146 int
 147 md_parse_option (int c, const char *arg ATTRIBUTE_UNUSED)
 148 {
 149   switch (c)
 150     {
 151     case OPTION_APUASM:
 152       emulate_apuasm = 1;
 153       break;
 154     case OPTION_DD3:
 155       use_dd2 = 1;
 156       break;
 157     case OPTION_DD2:
 158       use_dd2 = 1;
 159       break;
 160     case OPTION_DD1:
 161       use_dd2 = 0;
 162       break;
 163     default:
 164       return 0;
 165     }
 166   return 1;
 167 }
 168
 169 void
 170 md_show_usage (FILE *stream)
 171 {
 172   fputs (_("\
 173 SPU options:\n\
 174   --apuasm                emulate behaviour of apuasm\n"),
 175         stream);
 176 }
 177 \f
 178
 179 struct arg_encode {
 180   int size;
 181   int pos;
 182   int rshift;
 183   int lo, hi;
 184   int wlo, whi;
 185   bfd_reloc_code_real_type reloc;
 186 };
 187
 188 static struct arg_encode arg_encode[A_MAX] = {
 189   {  7,  0, 0,       0,    127,    0,   -1,  0 }, /* A_T */
 190   {  7,  7, 0,       0,    127,    0,   -1,  0 }, /* A_A */
 191   {  7, 14, 0,       0,    127,    0,   -1,  0 }, /* A_B */
 192   {  7, 21, 0,       0,    127,    0,   -1,  0 }, /* A_C */
 193   {  7,  7, 0,       0,    127,    0,   -1,  0 }, /* A_S */
 194   {  7,  7, 0,       0,    127,    0,   -1,  0 }, /* A_H */
 195   {  0,  0, 0,       0,     -1,    0,   -1,  0 }, /* A_P */
 196   {  7, 14, 0,       0,     -1,    0,   -1,  BFD_RELOC_SPU_IMM7 }, /* A_S3 */
 197   {  7, 14, 0,     -32,     31,  -31,    0,  BFD_RELOC_SPU_IMM7 }, /* A_S6 */
 198   {  7, 14, 0,       0,     -1,    0,   -1,  BFD_RELOC_SPU_IMM7 }, /* A_S7N */
 199   {  7, 14, 0,     -64,     63,  -63,    0,  BFD_RELOC_SPU_IMM7 }, /* A_S7 */
 200   {  8, 14, 0,       0,    127,    0,   -1,  BFD_RELOC_SPU_IMM8 }, /* A_U7A */
 201   {  8, 14, 0,       0,    127,    0,   -1,  BFD_RELOC_SPU_IMM8 }, /* A_U7B */
 202   { 10, 14, 0,    -512,    511, -128,  255,  BFD_RELOC_SPU_IMM10 }, /* A_S10B */
 203   { 10, 14, 0,    -512,    511,    0,   -1,  BFD_RELOC_SPU_IMM10 }, /* A_S10 */
 204   {  2, 23, 9,   -1024,   1023,    0,   -1,  BFD_RELOC_SPU_PCREL9a }, /* A_S11 */
 205   {  2, 14, 9,   -1024,   1023,    0,   -1,  BFD_RELOC_SPU_PCREL9b }, /* A_S11I */
 206   { 10, 14, 4,   -8192,   8191,    0,   -1,  BFD_RELOC_SPU_IMM10W }, /* A_S14 */
 207   { 16,  7, 0,  -32768,  32767,    0,   -1,  BFD_RELOC_SPU_IMM16 }, /* A_S16 */
 208   { 16,  7, 2, -131072, 262143,    0,   -1,  BFD_RELOC_SPU_IMM16W }, /* A_S18 */
 209   { 16,  7, 2, -262144, 262143,    0,   -1,  BFD_RELOC_SPU_PCREL16 }, /* A_R18 */
 210   {  7, 14, 0,       0,     -1,    0,   -1,  BFD_RELOC_SPU_IMM7 }, /* A_U3 */
 211   {  7, 14, 0,       0,    127,    0,   31,  BFD_RELOC_SPU_IMM7 }, /* A_U5 */
 212   {  7, 14, 0,       0,    127,    0,   63,  BFD_RELOC_SPU_IMM7 }, /* A_U6 */
 213   {  7, 14, 0,       0,     -1,    0,   -1,  BFD_RELOC_SPU_IMM7 }, /* A_U7 */
 214   { 14,  0, 0,       0,  16383,    0,   -1,  0 }, /* A_U14 */
 215   { 16,  7, 0,  -32768,  65535,    0,   -1,  BFD_RELOC_SPU_IMM16 }, /* A_X16 */
 216   { 18,  7, 0,       0, 262143,    0,   -1,  BFD_RELOC_SPU_IMM18 }, /* A_U18 */
 217 };
 218
 219 /* Some flags for handling errors.  This is very hackish and added after
 220  * the fact. */
 221 static int syntax_error_arg;
 222 static const char *syntax_error_param;
 223 static int syntax_reg;
 224
 225 static char *
 226 insn_fmt_string (struct spu_opcode *format)
 227 {
 228   static char buf[64];
 229   int len = 0;
 230   int i;
 231
 232   len += sprintf (&buf[len], "%s\t", format->mnemonic);
 233   for (i = 1; i <= format->arg[0]; i++)
 234     {
 235       int arg = format->arg[i];
 236       const char *exp;
 237       if (i > 1 && arg != A_P && format->arg[i-1] != A_P)
 238         buf[len++] =  ',';
 239       if (arg == A_P)
 240         exp = "(";
 241       else if (arg < A_P)
 242         exp = i == syntax_error_arg ? "REG" : "reg";
 243       else
 244         exp = i == syntax_error_arg ? "IMM" : "imm";
 245       len += sprintf (&buf[len], "%s", exp);
 246       if (i > 1 && format->arg[i-1] == A_P)
 247         buf[len++] =  ')';
 248     }
 249   buf[len] = 0;
 250   return buf;
 251 }
 252
 253 void
 254 md_assemble (char *op)
 255 {
 256   char *param, *thisfrag;
 257   char c;
 258   struct spu_opcode *format;
 259   struct spu_insn insn;
 260   int i;
 261
 262   gas_assert (op);
 263
 264   /* skip over instruction to find parameters */
 265
 266   for (param = op; *param != 0 && !ISSPACE (*param); param++)
 267     ;
 268   c = *param;
 269   *param = 0;
 270
 271   if (c != 0 && c != '\n')
 272     param++;
 273
 274   /* try to find the instruction in the hash table */
 275
 276   if ((format = (struct spu_opcode *) str_hash_find (op_hash, op)) == NULL)
 277     {
 278       as_bad (_("Invalid mnemonic '%s'"), op);
 279       return;
 280     }
 281
 282   if (!use_dd2 && strcmp (format->mnemonic, "orx") == 0)
 283     {
 284       as_bad (_("'%s' is only available in DD2.0 or higher."), op);
 285       return;
 286     }
 287
 288   while (1)
 289     {
 290       /* try parsing this instruction into insn */
 291       for (i = 0; i < MAX_RELOCS; i++)
 292         {
 293           insn.exp[i].X_add_symbol = 0;
 294           insn.exp[i].X_op_symbol = 0;
 295           insn.exp[i].X_add_number = 0;
 296           insn.exp[i].X_op = O_illegal;
 297           insn.reloc_arg[i] = -1;
 298           insn.reloc[i] = BFD_RELOC_NONE;
 299         }
 300       insn.opcode = format->opcode;
 301       insn.tag = (enum spu_insns) (format - spu_opcodes);
 302
 303       syntax_error_arg = 0;
 304       syntax_error_param = 0;
 305       syntax_reg = 0;
 306       if (calcop (format, param, &insn))
 307         break;
 308
 309       /* if it doesn't parse try the next instruction */
 310       if (!strcmp (format[0].mnemonic, format[1].mnemonic))
 311         format++;
 312       else
 313         {
 314           int parg = format[0].arg[syntax_error_arg-1];
 315
 316           as_fatal (_("Error in argument %d.  Expecting:  \"%s\""),
 317                     syntax_error_arg - (parg == A_P),
 318                     insn_fmt_string (format));
 319           return;
 320         }
 321     }
 322
 323   if ((syntax_reg & 4)
 324       && ! (insn.tag == M_RDCH
 325             || insn.tag == M_RCHCNT
 326             || insn.tag == M_WRCH))
 327     as_warn (_("Mixing register syntax, with and without '$'."));
 328   if (syntax_error_param)
 329     {
 330       const char *d = syntax_error_param;
 331       while (*d != '$')
 332         d--;
 333       as_warn (_("Treating '%-*s' as a symbol."), (int)(syntax_error_param - d), d);
 334     }
 335
 336   if (brinfo != 0
 337       && (insn.tag <= M_BRASL
 338           || (insn.tag >= M_BRZ && insn.tag <= M_BRHNZ))
 339       && (insn.opcode & 0x7ff80) == 0
 340       && (insn.reloc_arg[0] == A_R18
 341           || insn.reloc_arg[0] == A_S18
 342           || insn.reloc_arg[1] == A_R18
 343           || insn.reloc_arg[1] == A_S18))
 344     insn.opcode |= brinfo << 7;
 345
 346   /* grow the current frag and plop in the opcode */
 347
 348   thisfrag = frag_more (4);
 349   md_number_to_chars (thisfrag, insn.opcode, 4);
 350
 351   /* if this instruction requires labels mark it for later */
 352
 353   for (i = 0; i < MAX_RELOCS; i++)
 354     if (insn.reloc_arg[i] >= 0)
 355       {
 356         fixS *fixP;
 357         bfd_reloc_code_real_type reloc = insn.reloc[i];
 358         int pcrel = 0;
 359
 360         if (reloc == BFD_RELOC_SPU_PCREL9a
 361             || reloc == BFD_RELOC_SPU_PCREL9b
 362             || reloc == BFD_RELOC_SPU_PCREL16)
 363           pcrel = 1;
 364         fixP = fix_new_exp (frag_now,
 365                             thisfrag - frag_now->fr_literal,
 366                             4,
 367                             &insn.exp[i],
 368                             pcrel,
 369                             reloc);
 370         fixP->tc_fix_data.arg_format = insn.reloc_arg[i];
 371         fixP->tc_fix_data.insn_tag = insn.tag;
 372       }
 373   dwarf2_emit_insn (4);
 374
 375   /* .brinfo lasts exactly one instruction.  */
 376   brinfo = 0;
 377 }
 378
 379 static int
 380 calcop (struct spu_opcode *format, const char *param, struct spu_insn *insn)
 381 {
 382   int i;
 383   int paren = 0;
 384   int arg;
 385
 386   for (i = 1; i <= format->arg[0]; i++)
 387     {
 388       arg = format->arg[i];
 389       syntax_error_arg = i;
 390
 391       while (ISSPACE (*param))
 392         param++;
 393       if (*param == 0 || *param == ',')
 394         return 0;
 395       if (arg < A_P)
 396         param = get_reg (param, insn, arg, 1);
 397       else if (arg > A_P)
 398         param = get_imm (param, insn, arg);
 399       else if (arg == A_P)
 400         {
 401           paren++;
 402           if ('(' != *param++)
 403             return 0;
 404         }
 405
 406       if (!param)
 407         return 0;
 408
 409       while (ISSPACE (*param))
 410         param++;
 411
 412       if (arg != A_P && paren)
 413         {
 414           paren--;
 415           if (')' != *param++)
 416             return 0;
 417         }
 418       else if (i < format->arg[0]
 419                && format->arg[i] != A_P
 420                && format->arg[i+1] != A_P)
 421         {
 422           if (',' != *param++)
 423             {
 424               syntax_error_arg++;
 425               return 0;
 426             }
 427         }
 428     }
 429   while (ISSPACE (*param))
 430     param++;
 431   return !paren && (*param == 0 || *param == '\n');
 432 }
 433
 434 struct reg_name {
 435     unsigned int regno;
 436     unsigned int length;
 437     char name[32];
 438 };
 439
 440 #define REG_NAME(NO,NM) { NO, sizeof (NM) - 1, NM }
 441
 442 static struct reg_name reg_name[] = {
 443   REG_NAME (0, "lr"),  /* link register */
 444   REG_NAME (1, "sp"),  /* stack pointer */
 445   REG_NAME (0, "rp"),  /* link register */
 446   REG_NAME (127, "fp"),  /* frame pointer */
 447 };
 448
 449 static struct reg_name sp_reg_name[] = {
 450 };
 451
 452 static struct reg_name ch_reg_name[] = {
 453   REG_NAME (  0, "SPU_RdEventStat"),
 454   REG_NAME (  1, "SPU_WrEventMask"),
 455   REG_NAME (  2, "SPU_WrEventAck"),
 456   REG_NAME (  3, "SPU_RdSigNotify1"),
 457   REG_NAME (  4, "SPU_RdSigNotify2"),
 458   REG_NAME (  7, "SPU_WrDec"),
 459   REG_NAME (  8, "SPU_RdDec"),
 460   REG_NAME ( 11, "SPU_RdEventMask"), /* DD2.0 only */
 461   REG_NAME ( 13, "SPU_RdMachStat"),
 462   REG_NAME ( 14, "SPU_WrSRR0"),
 463   REG_NAME ( 15, "SPU_RdSRR0"),
 464   REG_NAME ( 28, "SPU_WrOutMbox"),
 465   REG_NAME ( 29, "SPU_RdInMbox"),
 466   REG_NAME ( 30, "SPU_WrOutIntrMbox"),
 467   REG_NAME (  9, "MFC_WrMSSyncReq"),
 468   REG_NAME ( 12, "MFC_RdTagMask"),   /* DD2.0 only */
 469   REG_NAME ( 16, "MFC_LSA"),
 470   REG_NAME ( 17, "MFC_EAH"),
 471   REG_NAME ( 18, "MFC_EAL"),
 472   REG_NAME ( 19, "MFC_Size"),
 473   REG_NAME ( 20, "MFC_TagID"),
 474   REG_NAME ( 21, "MFC_Cmd"),
 475   REG_NAME ( 22, "MFC_WrTagMask"),
 476   REG_NAME ( 23, "MFC_WrTagUpdate"),
 477   REG_NAME ( 24, "MFC_RdTagStat"),
 478   REG_NAME ( 25, "MFC_RdListStallStat"),
 479   REG_NAME ( 26, "MFC_WrListStallAck"),
 480   REG_NAME ( 27, "MFC_RdAtomicStat"),
 481 };
 482 #undef REG_NAME
 483
 484 static const char *
 485 get_reg (const char *param, struct spu_insn *insn, int arg, int accept_expr)
 486 {
 487   unsigned regno;
 488   int saw_prefix = 0;
 489
 490   if (*param == '$')
 491     {
 492       saw_prefix = 1;
 493       param++;
 494     }
 495
 496   if (arg == A_H) /* Channel */
 497     {
 498       if ((param[0] == 'c' || param[0] == 'C')
 499           && (param[1] == 'h' || param[1] == 'H')
 500           && ISDIGIT (param[2]))
 501         param += 2;
 502     }
 503   else if (arg == A_S) /* Special purpose register */
 504     {
 505       if ((param[0] == 's' || param[0] == 'S')
 506           && (param[1] == 'p' || param[1] == 'P')
 507           && ISDIGIT (param[2]))
 508         param += 2;
 509     }
 510
 511   if (ISDIGIT (*param))
 512     {
 513       regno = 0;
 514       while (ISDIGIT (*param))
 515         regno = regno * 10 + *param++ - '0';
 516     }
 517   else
 518     {
 519       struct reg_name *rn;
 520       unsigned int i, n, l = 0;
 521
 522       if (arg == A_H) /* Channel */
 523         {
 524           rn = ch_reg_name;
 525           n = sizeof (ch_reg_name) / sizeof (*ch_reg_name);
 526         }
 527       else if (arg == A_S) /* Special purpose register */
 528         {
 529           rn = sp_reg_name;
 530           n = sizeof (sp_reg_name) / sizeof (*sp_reg_name);
 531         }
 532       else
 533         {
 534           rn = reg_name;
 535           n = sizeof (reg_name) / sizeof (*reg_name);
 536         }
 537       regno = 128;
 538       for (i = 0; i < n; i++)
 539         if (rn[i].length > l
 540             && 0 == strncasecmp (param, rn[i].name, rn[i].length))
 541           {
 542             l = rn[i].length;
 543             regno = rn[i].regno;
 544           }
 545       param += l;
 546     }
 547
 548   if (!use_dd2
 549       && arg == A_H)
 550     {
 551       if (regno == 11)
 552         as_bad (_("'SPU_RdEventMask' (channel 11) is only available in DD2.0 or higher."));
 553       else if (regno == 12)
 554         as_bad (_("'MFC_RdTagMask' (channel 12) is only available in DD2.0 or higher."));
 555     }
 556
 557   if (regno < 128)
 558     {
 559       insn->opcode |= regno << arg_encode[arg].pos;
 560       if ((!saw_prefix && syntax_reg == 1)
 561           || (saw_prefix && syntax_reg == 2))
 562         syntax_reg |= 4;
 563       syntax_reg |= saw_prefix ? 1 : 2;
 564       return param;
 565     }
 566
 567   if (accept_expr)
 568     {
 569       char *save_ptr;
 570       expressionS ex;
 571       save_ptr = input_line_pointer;
 572       input_line_pointer = (char *)param;
 573       expression (&ex);
 574       param = input_line_pointer;
 575       input_line_pointer = save_ptr;
 576       resolve_register (&ex);
 577       if (ex.X_op == O_register || ex.X_op == O_constant)
 578         {
 579           insn->opcode |= ex.X_add_number << arg_encode[arg].pos;
 580           return param;
 581         }
 582     }
 583   return 0;
 584 }
 585
 586 static const char *
 587 get_imm (const char *param, struct spu_insn *insn, int arg)
 588 {
 589   int val;
 590   char *save_ptr;
 591   int low = 0, high = 0;
 592   int reloc_i = insn->reloc_arg[0] >= 0 ? 1 : 0;
 593
 594   if (strncasecmp (param, "%lo(", 4) == 0)
 595     {
 596       param += 3;
 597       low = 1;
 598       as_warn (_("Using old style, %%lo(expr), please change to PPC style, expr@l."));
 599     }
 600   else if (strncasecmp (param, "%hi(", 4) == 0)
 601     {
 602       param += 3;
 603       high = 1;
 604       as_warn (_("Using old style, %%hi(expr), please change to PPC style, expr@h."));
 605     }
 606   else if (strncasecmp (param, "%pic(", 5) == 0)
 607     {
 608       /* Currently we expect %pic(expr) == expr, so do nothing here.
 609          i.e. for code loaded at address 0 $toc will be 0.  */
 610       param += 4;
 611     }
 612
 613   if (*param == '$')
 614     {
 615       /* Symbols can start with $, but if this symbol matches a register
 616          name, it's probably a mistake.  The only way to avoid this
 617          warning is to rename the symbol.  */
 618       struct spu_insn tmp_insn;
 619       const char *np = get_reg (param, &tmp_insn, arg, 0);
 620
 621       if (np)
 622         syntax_error_param = np;
 623     }
 624
 625   save_ptr = input_line_pointer;
 626   input_line_pointer = (char *) param;
 627   expression (&insn->exp[reloc_i]);
 628   param = input_line_pointer;
 629   input_line_pointer = save_ptr;
 630
 631   /* Similar to ppc_elf_suffix in tc-ppc.c.  We have so few cases to
 632      handle we do it inlined here. */
 633   if (param[0] == '@' && !ISALNUM (param[2]) && param[2] != '@')
 634     {
 635       if (param[1] == 'h' || param[1] == 'H')
 636         {
 637           high = 1;
 638           param += 2;
 639         }
 640       else if (param[1] == 'l' || param[1] == 'L')
 641         {
 642           low = 1;
 643           param += 2;
 644         }
 645     }
 646
 647   if (insn->exp[reloc_i].X_op == O_constant)
 648     {
 649       val = insn->exp[reloc_i].X_add_number;
 650
 651       if (emulate_apuasm)
 652         {
 653           /* Convert the value to a format we expect. */
 654           val <<= arg_encode[arg].rshift;
 655           if (arg == A_U7A)
 656             val = 173 - val;
 657           else if (arg == A_U7B)
 658             val = 155 - val;
 659         }
 660
 661       if (high)
 662         val = val >> 16;
 663       else if (low)
 664         val = val & 0xffff;
 665
 666       /* Warn about out of range expressions. */
 667       {
 668         int hi = arg_encode[arg].hi;
 669         int lo = arg_encode[arg].lo;
 670         int whi = arg_encode[arg].whi;
 671         int wlo = arg_encode[arg].wlo;
 672
 673         if (hi > lo && (val < lo || val > hi))
 674           as_fatal (_("Constant expression %d out of range, [%d, %d]."),
 675                     val, lo, hi);
 676         else if (whi > wlo && (val < wlo || val > whi))
 677           as_warn (_("Constant expression %d out of range, [%d, %d]."),
 678                    val, wlo, whi);
 679       }
 680
 681       if (arg == A_U7A)
 682         val = 173 - val;
 683       else if (arg == A_U7B)
 684         val = 155 - val;
 685
 686       /* Branch hints have a split encoding.  Do the bottom part. */
 687       if (arg == A_S11 || arg == A_S11I)
 688         insn->opcode |= ((val >> 2) & 0x7f);
 689
 690       insn->opcode |= (((val >> arg_encode[arg].rshift)
 691                         & ((1 << arg_encode[arg].size) - 1))
 692                        << arg_encode[arg].pos);
 693     }
 694   else
 695     {
 696       insn->reloc_arg[reloc_i] = arg;
 697       if (high)
 698         insn->reloc[reloc_i] = BFD_RELOC_SPU_HI16;
 699       else if (low)
 700         insn->reloc[reloc_i] = BFD_RELOC_SPU_LO16;
 701       else
 702         insn->reloc[reloc_i] = arg_encode[arg].reloc;
 703     }
 704
 705   return param;
 706 }
 707
 708 const char *
 709 md_atof (int type, char *litP, int *sizeP)
 710 {
 711   return ieee_md_atof (type, litP, sizeP, true);
 712 }
 713
 714 #ifndef WORKING_DOT_WORD
 715 int md_short_jump_size = 4;
 716
 717 void
 718 md_create_short_jump (char *ptr,
 719                       addressT from_addr ATTRIBUTE_UNUSED,
 720                       addressT to_addr ATTRIBUTE_UNUSED,
 721                       fragS *frag,
 722                       symbolS *to_symbol)
 723 {
 724   ptr[0] = (char) 0xc0;
 725   ptr[1] = 0x00;
 726   ptr[2] = 0x00;
 727   ptr[3] = 0x00;
 728   fix_new (frag,
 729            ptr - frag->fr_literal,
 730            4,
 731            to_symbol,
 732            (offsetT) 0,
 733            0,
 734            BFD_RELOC_SPU_PCREL16);
 735 }
 736
 737 int md_long_jump_size = 4;
 738
 739 void
 740 md_create_long_jump (char *ptr,
 741                      addressT from_addr ATTRIBUTE_UNUSED,
 742                      addressT to_addr ATTRIBUTE_UNUSED,
 743                      fragS *frag,
 744                      symbolS *to_symbol)
 745 {
 746   ptr[0] = (char) 0xc0;
 747   ptr[1] = 0x00;
 748   ptr[2] = 0x00;
 749   ptr[3] = 0x00;
 750   fix_new (frag,
 751            ptr - frag->fr_literal,
 752            4,
 753            to_symbol,
 754            (offsetT) 0,
 755            0,
 756            BFD_RELOC_SPU_PCREL16);
 757 }
 758 #endif
 759
 760 /* Handle .brinfo <priority>,<lrlive>.  */
 761 static void
 762 spu_brinfo (int ignore ATTRIBUTE_UNUSED)
 763 {
 764   addressT priority;
 765   addressT lrlive;
 766
 767   priority = get_absolute_expression ();
 768   SKIP_WHITESPACE ();
 769
 770   lrlive = 0;
 771   if (*input_line_pointer == ',')
 772     {
 773       ++input_line_pointer;
 774       lrlive = get_absolute_expression ();
 775     }
 776
 777   if (priority > 0x1fff)
 778     {
 779       as_bad (_("invalid priority '%lu'"), (unsigned long) priority);
 780       priority = 0;
 781     }
 782
 783   if (lrlive > 7)
 784     {
 785       as_bad (_("invalid lrlive '%lu'"), (unsigned long) lrlive);
 786       lrlive = 0;
 787     }
 788
 789   brinfo = (lrlive << 13) | priority;
 790   demand_empty_rest_of_line ();
 791 }
 792
 793 /* Support @ppu on symbols referenced in .int/.long/.word/.quad.  */
 794 static void
 795 spu_cons (int nbytes)
 796 {
 797   expressionS exp;
 798
 799   if (is_it_end_of_statement ())
 800     {
 801       demand_empty_rest_of_line ();
 802       return;
 803     }
 804
 805   do
 806     {
 807       char *save = input_line_pointer;
 808
 809       /* Use deferred_expression here so that an expression involving
 810          a symbol that happens to be defined already as an spu symbol,
 811          is not resolved.  */
 812       deferred_expression (&exp);
 813       if ((exp.X_op == O_symbol
 814            || exp.X_op == O_constant)
 815           && strncasecmp (input_line_pointer, "@ppu", 4) == 0)
 816         {
 817           char *p = frag_more (nbytes);
 818           enum bfd_reloc_code_real reloc;
 819
 820           /* Check for identifier@suffix+constant.  */
 821           input_line_pointer += 4;
 822           if (*input_line_pointer == '-' || *input_line_pointer == '+')
 823             {
 824               expressionS new_exp;
 825
 826               save = input_line_pointer;
 827               expression (&new_exp);
 828               if (new_exp.X_op == O_constant)
 829                 exp.X_add_number += new_exp.X_add_number;
 830               else
 831                 input_line_pointer = save;
 832             }
 833
 834           reloc = nbytes == 4 ? BFD_RELOC_SPU_PPU32 : BFD_RELOC_SPU_PPU64;
 835           fix_new_exp (frag_now, p - frag_now->fr_literal, nbytes,
 836                        &exp, 0, reloc);
 837         }
 838       else
 839         {
 840           /* Don't use deferred_expression for anything else.
 841              deferred_expression won't evaulate dot at the point it is
 842              used.  */
 843           input_line_pointer = save;
 844           expression (&exp);
 845           emit_expr (&exp, nbytes);
 846         }
 847     }
 848   while (*input_line_pointer++ == ',');
 849
 850   /* Put terminator back into stream.  */
 851   input_line_pointer--;
 852   demand_empty_rest_of_line ();
 853 }
 854
 855 int
 856 md_estimate_size_before_relax (fragS *fragP ATTRIBUTE_UNUSED,
 857                                segT segment_type ATTRIBUTE_UNUSED)
 858 {
 859   as_fatal (_("Relaxation should never occur"));
 860   return -1;
 861 }
 862
 863 /* If while processing a fixup, a reloc really needs to be created,
 864    then it is done here.  */
 865
 866 arelent *
 867 tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED, fixS *fixp)
 868 {
 869   arelent *reloc;
 870   reloc = XNEW (arelent);
 871   reloc->sym_ptr_ptr = XNEW (asymbol *);
 872   *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
 873   reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
 874   reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
 875   if (reloc->howto == (reloc_howto_type *) NULL)
 876     {
 877       as_bad_where (fixp->fx_file, fixp->fx_line,
 878                     _("reloc %d not supported by object file format"),
 879                     (int) fixp->fx_r_type);
 880       free (reloc->sym_ptr_ptr);
 881       free (reloc);
 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_section_alignment (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   unsigned int mask;
 952   valueT val = *valP;
 953   char *place = fixP->fx_where + fixP->fx_frag->fr_literal;
 954
 955   if (fixP->fx_subsy != (symbolS *) NULL)
 956     {
 957       /* We can't actually support subtracting a symbol.  */
 958       as_bad_subtract (fixP);
 959     }
 960
 961   if (fixP->fx_addsy != NULL)
 962     {
 963       if (fixP->fx_pcrel)
 964         {
 965           /* Hack around bfd_install_relocation brain damage.  */
 966           val += fixP->fx_frag->fr_address + fixP->fx_where;
 967
 968           switch (fixP->fx_r_type)
 969             {
 970             case BFD_RELOC_32:
 971               fixP->fx_r_type = BFD_RELOC_32_PCREL;
 972               break;
 973
 974             case BFD_RELOC_SPU_PCREL16:
 975             case BFD_RELOC_SPU_PCREL9a:
 976             case BFD_RELOC_SPU_PCREL9b:
 977             case BFD_RELOC_32_PCREL:
 978               break;
 979
 980             default:
 981               as_bad_where (fixP->fx_file, fixP->fx_line,
 982                             _("expression too complex"));
 983               break;
 984             }
 985         }
 986     }
 987
 988   fixP->fx_addnumber = val;
 989
 990   if (fixP->fx_r_type == BFD_RELOC_SPU_PPU32
 991       || fixP->fx_r_type == BFD_RELOC_SPU_PPU64
 992       || fixP->fx_r_type == BFD_RELOC_SPU_ADD_PIC)
 993     return;
 994
 995   if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0)
 996     {
 997       fixP->fx_done = 1;
 998       res = 0;
 999       mask = 0;
1000       if (fixP->tc_fix_data.arg_format > A_P)
1001         {
1002           int hi = arg_encode[fixP->tc_fix_data.arg_format].hi;
1003           int lo = arg_encode[fixP->tc_fix_data.arg_format].lo;
1004           if (hi > lo && ((offsetT) val < lo || (offsetT) val > hi))
1005             as_bad_where (fixP->fx_file, fixP->fx_line,
1006                           _("Relocation doesn't fit. (relocation value = 0x%lx)"),
1007                           (long) val);
1008         }
1009
1010       switch (fixP->fx_r_type)
1011         {
1012         case BFD_RELOC_8:
1013           md_number_to_chars (place, val, 1);
1014           return;
1015
1016         case BFD_RELOC_16:
1017           md_number_to_chars (place, val, 2);
1018           return;
1019
1020         case BFD_RELOC_32:
1021         case BFD_RELOC_32_PCREL:
1022           md_number_to_chars (place, val, 4);
1023           return;
1024
1025         case BFD_RELOC_64:
1026           md_number_to_chars (place, val, 8);
1027           return;
1028
1029         case BFD_RELOC_SPU_IMM7:
1030           res = val << 14;
1031           mask = 0x7f << 14;
1032           break;
1033
1034         case BFD_RELOC_SPU_IMM8:
1035           res = val << 14;
1036           mask = 0xff << 14;
1037           break;
1038
1039         case BFD_RELOC_SPU_IMM10:
1040           res = val << 14;
1041           mask = 0x3ff << 14;
1042           break;
1043
1044         case BFD_RELOC_SPU_IMM10W:
1045           res = val << 10;
1046           mask = 0x3ff0 << 10;
1047           break;
1048
1049         case BFD_RELOC_SPU_IMM16:
1050           res = val << 7;
1051           mask = 0xffff << 7;
1052           break;
1053
1054         case BFD_RELOC_SPU_IMM16W:
1055           res = val << 5;
1056           mask = 0x3fffc << 5;
1057           break;
1058
1059         case BFD_RELOC_SPU_IMM18:
1060           res = val << 7;
1061           mask = 0x3ffff << 7;
1062           break;
1063
1064         case BFD_RELOC_SPU_PCREL9a:
1065           res = ((val & 0x1fc) >> 2) | ((val & 0x600) << 14);
1066           mask = (0x1fc >> 2) | (0x600 << 14);
1067           break;
1068
1069         case BFD_RELOC_SPU_PCREL9b:
1070           res = ((val & 0x1fc) >> 2) | ((val & 0x600) << 5);
1071           mask = (0x1fc >> 2) | (0x600 << 5);
1072           break;
1073
1074         case BFD_RELOC_SPU_PCREL16:
1075           res = val << 5;
1076           mask = 0x3fffc << 5;
1077           break;
1078
1079         case BFD_RELOC_SPU_HI16:
1080           res = val >> 9;
1081           mask = 0xffff << 7;
1082           break;
1083
1084         case BFD_RELOC_SPU_LO16:
1085           res = val << 7;
1086           mask = 0xffff << 7;
1087           break;
1088
1089         default:
1090           as_bad_where (fixP->fx_file, fixP->fx_line,
1091                         _("reloc %d not supported by object file format"),
1092                         (int) fixP->fx_r_type);
1093         }
1094
1095       res &= mask;
1096       place[0] = (place[0] & (~mask >> 24)) | ((res >> 24) & 0xff);
1097       place[1] = (place[1] & (~mask >> 16)) | ((res >> 16) & 0xff);
1098       place[2] = (place[2] & (~mask >> 8)) | ((res >> 8) & 0xff);
1099       place[3] = (place[3] & ~mask) | (res & 0xff);
1100     }
1101 }