gas/config/tc-spu.c

   1 /* spu.c -- Assembler for the IBM Synergistic Processing Unit (SPU)
   2
   3    Copyright 2006, 2007, 2008 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 (*) (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,
 124                             (void *) &spu_opcodes[i]);
 125
 126       if (retval != NULL && strcmp (retval, "exists") != 0)
 127         as_fatal (_("Can't hash instruction '%s':%s"),
 128                   spu_opcodes[i].mnemonic, retval);
 129     }
 130 }
 131 \f
 132 const char *md_shortopts = "";
 133 struct option md_longopts[] = {
 134 #define OPTION_APUASM (OPTION_MD_BASE)
 135   {"apuasm", no_argument, NULL, OPTION_APUASM},
 136 #define OPTION_DD2 (OPTION_MD_BASE+1)
 137   {"mdd2.0", no_argument, NULL, OPTION_DD2},
 138 #define OPTION_DD1 (OPTION_MD_BASE+2)
 139   {"mdd1.0", no_argument, NULL, OPTION_DD1},
 140 #define OPTION_DD3 (OPTION_MD_BASE+3)
 141   {"mdd3.0", no_argument, NULL, OPTION_DD3},
 142   { NULL, no_argument, NULL, 0 }
 143 };
 144 size_t md_longopts_size = sizeof (md_longopts);
 145
 146 /* When set (by -apuasm) our assembler emulates the behaviour of apuasm.
 147  * e.g. don't add bias to float conversion and don't right shift
 148  * immediate values. */
 149 static int emulate_apuasm;
 150
 151 /* Use the dd2.0 instructions set.  The only differences are some new
 152  * register names and the orx insn */
 153 static int use_dd2 = 1;
 154
 155 int
 156 md_parse_option (int c, char *arg ATTRIBUTE_UNUSED)
 157 {
 158   switch (c)
 159     {
 160     case OPTION_APUASM:
 161       emulate_apuasm = 1;
 162       break;
 163     case OPTION_DD3:
 164       use_dd2 = 1;
 165       break;
 166     case OPTION_DD2:
 167       use_dd2 = 1;
 168       break;
 169     case OPTION_DD1:
 170       use_dd2 = 0;
 171       break;
 172     default:
 173       return 0;
 174     }
 175   return 1;
 176 }
 177
 178 void
 179 md_show_usage (FILE *stream)
 180 {
 181   fputs (_("\
 182 SPU options:\n\
 183   --apuasm                emulate behaviour of apuasm\n"),
 184         stream);
 185 }
 186 \f
 187
 188 struct arg_encode {
 189   int size;
 190   int pos;
 191   int rshift;
 192   int lo, hi;
 193   int wlo, whi;
 194   bfd_reloc_code_real_type reloc;
 195 };
 196
 197 static struct arg_encode arg_encode[A_MAX] = {
 198   {  7,  0, 0,       0,    127,    0,   -1,  0 }, /* A_T */
 199   {  7,  7, 0,       0,    127,    0,   -1,  0 }, /* A_A */
 200   {  7, 14, 0,       0,    127,    0,   -1,  0 }, /* A_B */
 201   {  7, 21, 0,       0,    127,    0,   -1,  0 }, /* A_C */
 202   {  7,  7, 0,       0,    127,    0,   -1,  0 }, /* A_S */
 203   {  7,  7, 0,       0,    127,    0,   -1,  0 }, /* A_H */
 204   {  0,  0, 0,       0,     -1,    0,   -1,  0 }, /* A_P */
 205   {  7, 14, 0,       0,     -1,    0,   -1,  BFD_RELOC_SPU_IMM7 }, /* A_S3 */
 206   {  7, 14, 0,     -32,     31,  -31,    0,  BFD_RELOC_SPU_IMM7 }, /* A_S6 */
 207   {  7, 14, 0,       0,     -1,    0,   -1,  BFD_RELOC_SPU_IMM7 }, /* A_S7N */
 208   {  7, 14, 0,     -64,     63,  -63,    0,  BFD_RELOC_SPU_IMM7 }, /* A_S7 */
 209   {  8, 14, 0,       0,    127,    0,   -1,  BFD_RELOC_SPU_IMM8 }, /* A_U7A */
 210   {  8, 14, 0,       0,    127,    0,   -1,  BFD_RELOC_SPU_IMM8 }, /* A_U7B */
 211   { 10, 14, 0,    -512,    511, -128,  255,  BFD_RELOC_SPU_IMM10 }, /* A_S10B */
 212   { 10, 14, 0,    -512,    511,    0,   -1,  BFD_RELOC_SPU_IMM10 }, /* A_S10 */
 213   {  2, 23, 9,   -1024,   1023,    0,   -1,  BFD_RELOC_SPU_PCREL9a }, /* A_S11 */
 214   {  2, 14, 9,   -1024,   1023,    0,   -1,  BFD_RELOC_SPU_PCREL9b }, /* A_S11I */
 215   { 10, 14, 4,   -8192,   8191,    0,   -1,  BFD_RELOC_SPU_IMM10W }, /* A_S14 */
 216   { 16,  7, 0,  -32768,  32767,    0,   -1,  BFD_RELOC_SPU_IMM16 }, /* A_S16 */
 217   { 16,  7, 2, -131072, 262143,    0,   -1,  BFD_RELOC_SPU_IMM16W }, /* A_S18 */
 218   { 16,  7, 2, -262144, 262143,    0,   -1,  BFD_RELOC_SPU_PCREL16 }, /* A_R18 */
 219   {  7, 14, 0,       0,     -1,    0,   -1,  BFD_RELOC_SPU_IMM7 }, /* A_U3 */
 220   {  7, 14, 0,       0,    127,    0,   31,  BFD_RELOC_SPU_IMM7 }, /* A_U5 */
 221   {  7, 14, 0,       0,    127,    0,   63,  BFD_RELOC_SPU_IMM7 }, /* A_U6 */
 222   {  7, 14, 0,       0,     -1,    0,   -1,  BFD_RELOC_SPU_IMM7 }, /* A_U7 */
 223   { 14,  0, 0,       0,  16383,    0,   -1,  0 }, /* A_U14 */
 224   { 16,  7, 0,  -32768,  65535,    0,   -1,  BFD_RELOC_SPU_IMM16 }, /* A_X16 */
 225   { 18,  7, 0,       0, 262143,    0,   -1,  BFD_RELOC_SPU_IMM18 }, /* A_U18 */
 226 };
 227
 228 /* Some flags for handling errors.  This is very hackish and added after
 229  * the fact. */
 230 static int syntax_error_arg;
 231 static const char *syntax_error_param;
 232 static int syntax_reg;
 233
 234 static char *
 235 insn_fmt_string (struct spu_opcode *format)
 236 {
 237   static char buf[64];
 238   int len = 0;
 239   int i;
 240
 241   len += sprintf (&buf[len], "%s\t", format->mnemonic);
 242   for (i = 1; i <= format->arg[0]; i++)
 243     {
 244       int arg = format->arg[i];
 245       char *exp;
 246       if (i > 1 && arg != A_P && format->arg[i-1] != A_P)
 247         buf[len++] =  ',';
 248       if (arg == A_P)
 249         exp = "(";
 250       else if (arg < A_P)
 251         exp = i == syntax_error_arg ? "REG" : "reg";
 252       else
 253         exp = i == syntax_error_arg ? "IMM" : "imm";
 254       len += sprintf (&buf[len], "%s", exp);
 255       if (i > 1 && format->arg[i-1] == A_P)
 256         buf[len++] =  ')';
 257     }
 258   buf[len] = 0;
 259   return buf;
 260 }
 261
 262 void
 263 md_assemble (char *op)
 264 {
 265   char *param, *thisfrag;
 266   char c;
 267   struct spu_opcode *format;
 268   struct spu_insn insn;
 269   int i;
 270
 271   assert (op);
 272
 273   /* skip over instruction to find parameters */
 274
 275   for (param = op; *param != 0 && !ISSPACE (*param); param++)
 276     ;
 277   c = *param;
 278   *param = 0;
 279
 280   if (c != 0 && c != '\n')
 281     param++;
 282
 283   /* try to find the instruction in the hash table */
 284
 285   if ((format = (struct spu_opcode *) hash_find (op_hash, op)) == NULL)
 286     {
 287       as_bad (_("Invalid mnemonic '%s'"), op);
 288       return;
 289     }
 290
 291   if (!use_dd2 && strcmp (format->mnemonic, "orx") == 0)
 292     {
 293       as_bad (_("'%s' is only available in DD2.0 or higher."), op);
 294       return;
 295     }
 296
 297   while (1)
 298     {
 299       /* try parsing this instruction into insn */
 300       for (i = 0; i < MAX_RELOCS; i++)
 301         {
 302           insn.exp[i].X_add_symbol = 0;
 303           insn.exp[i].X_op_symbol = 0;
 304           insn.exp[i].X_add_number = 0;
 305           insn.exp[i].X_op = O_illegal;
 306           insn.reloc_arg[i] = -1;
 307           insn.reloc[i] = BFD_RELOC_NONE;
 308         }
 309       insn.opcode = format->opcode;
 310       insn.tag = (enum spu_insns) (format - spu_opcodes);
 311
 312       syntax_error_arg = 0;
 313       syntax_error_param = 0;
 314       syntax_reg = 0;
 315       if (calcop (format, param, &insn))
 316         break;
 317
 318       /* if it doesn't parse try the next instruction */
 319       if (!strcmp (format[0].mnemonic, format[1].mnemonic))
 320         format++;
 321       else
 322         {
 323           int parg = format[0].arg[syntax_error_arg-1];
 324
 325           as_fatal (_("Error in argument %d.  Expecting:  \"%s\""),
 326                     syntax_error_arg - (parg == A_P),
 327                     insn_fmt_string (format));
 328           return;
 329         }
 330     }
 331
 332   if ((syntax_reg & 4)
 333       && ! (insn.tag == M_RDCH
 334             || insn.tag == M_RCHCNT
 335             || insn.tag == M_WRCH))
 336     as_warn (_("Mixing register syntax, with and without '$'."));
 337   if (syntax_error_param)
 338     {
 339       const char *d = syntax_error_param;
 340       while (*d != '$')
 341         d--;
 342       as_warn (_("Treating '%-*s' as a symbol."), (int)(syntax_error_param - d), d);
 343     }
 344
 345   /* grow the current frag and plop in the opcode */
 346
 347   thisfrag = frag_more (4);
 348   md_number_to_chars (thisfrag, insn.opcode, 4);
 349
 350   /* if this instruction requires labels mark it for later */
 351
 352   for (i = 0; i < MAX_RELOCS; i++)
 353     if (insn.reloc_arg[i] >= 0)
 354       {
 355         fixS *fixP;
 356         bfd_reloc_code_real_type reloc = insn.reloc[i];
 357         int pcrel = 0;
 358
 359         if (reloc == BFD_RELOC_SPU_PCREL9a
 360             || reloc == BFD_RELOC_SPU_PCREL9b
 361             || reloc == BFD_RELOC_SPU_PCREL16)
 362           pcrel = 1;
 363         fixP = fix_new_exp (frag_now,
 364                             thisfrag - frag_now->fr_literal,
 365                             4,
 366                             &insn.exp[i],
 367                             pcrel,
 368                             reloc);
 369         fixP->tc_fix_data.arg_format = insn.reloc_arg[i];
 370         fixP->tc_fix_data.insn_tag = insn.tag;
 371       }
 372   dwarf2_emit_insn (4);
 373 }
 374
 375 static int
 376 calcop (struct spu_opcode *format, const char *param, struct spu_insn *insn)
 377 {
 378   int i;
 379   int paren = 0;
 380   int arg;
 381
 382   for (i = 1; i <= format->arg[0]; i++)
 383     {
 384       arg = format->arg[i];
 385       syntax_error_arg = i;
 386
 387       while (ISSPACE (*param))
 388         param++;
 389       if (*param == 0 || *param == ',')
 390         return 0;
 391       if (arg < A_P)
 392         param = get_reg (param, insn, arg, 1);
 393       else if (arg > A_P)
 394         param = get_imm (param, insn, arg);
 395       else if (arg == A_P)
 396         {
 397           paren++;
 398           if ('(' != *param++)
 399             return 0;
 400         }
 401
 402       if (!param)
 403         return 0;
 404
 405       while (ISSPACE (*param))
 406         param++;
 407
 408       if (arg != A_P && paren)
 409         {
 410           paren--;
 411           if (')' != *param++)
 412             return 0;
 413         }
 414       else if (i < format->arg[0]
 415                && format->arg[i] != A_P
 416                && format->arg[i+1] != A_P)
 417         {
 418           if (',' != *param++)
 419             {
 420               syntax_error_arg++;
 421               return 0;
 422             }
 423         }
 424     }
 425   while (ISSPACE (*param))
 426     param++;
 427   return !paren && (*param == 0 || *param == '\n');
 428 }
 429
 430 struct reg_name {
 431     unsigned int regno;
 432     unsigned int length;
 433     char name[32];
 434 };
 435
 436 #define REG_NAME(NO,NM) { NO, sizeof (NM) - 1, NM }
 437
 438 static struct reg_name reg_name[] = {
 439   REG_NAME (0, "lr"),  /* link register */
 440   REG_NAME (1, "sp"),  /* stack pointer */
 441   REG_NAME (0, "rp"),  /* link register */
 442   REG_NAME (127, "fp"),  /* frame pointer */
 443 };
 444
 445 static struct reg_name sp_reg_name[] = {
 446 };
 447
 448 static struct reg_name ch_reg_name[] = {
 449   REG_NAME (  0, "SPU_RdEventStat"),
 450   REG_NAME (  1, "SPU_WrEventMask"),
 451   REG_NAME (  2, "SPU_WrEventAck"),
 452   REG_NAME (  3, "SPU_RdSigNotify1"),
 453   REG_NAME (  4, "SPU_RdSigNotify2"),
 454   REG_NAME (  7, "SPU_WrDec"),
 455   REG_NAME (  8, "SPU_RdDec"),
 456   REG_NAME ( 11, "SPU_RdEventMask"), /* DD2.0 only */
 457   REG_NAME ( 13, "SPU_RdMachStat"),
 458   REG_NAME ( 14, "SPU_WrSRR0"),
 459   REG_NAME ( 15, "SPU_RdSRR0"),
 460   REG_NAME ( 28, "SPU_WrOutMbox"),
 461   REG_NAME ( 29, "SPU_RdInMbox"),
 462   REG_NAME ( 30, "SPU_WrOutIntrMbox"),
 463   REG_NAME (  9, "MFC_WrMSSyncReq"),
 464   REG_NAME ( 12, "MFC_RdTagMask"),   /* DD2.0 only */
 465   REG_NAME ( 16, "MFC_LSA"),
 466   REG_NAME ( 17, "MFC_EAH"),
 467   REG_NAME ( 18, "MFC_EAL"),
 468   REG_NAME ( 19, "MFC_Size"),
 469   REG_NAME ( 20, "MFC_TagID"),
 470   REG_NAME ( 21, "MFC_Cmd"),
 471   REG_NAME ( 22, "MFC_WrTagMask"),
 472   REG_NAME ( 23, "MFC_WrTagUpdate"),
 473   REG_NAME ( 24, "MFC_RdTagStat"),
 474   REG_NAME ( 25, "MFC_RdListStallStat"),
 475   REG_NAME ( 26, "MFC_WrListStallAck"),
 476   REG_NAME ( 27, "MFC_RdAtomicStat"),
 477 };
 478 #undef REG_NAME
 479
 480 static const char *
 481 get_reg (const char *param, struct spu_insn *insn, int arg, int accept_expr)
 482 {
 483   unsigned regno;
 484   int saw_prefix = 0;
 485
 486   if (*param == '$')
 487     {
 488       saw_prefix = 1;
 489       param++;
 490     }
 491
 492   if (arg == A_H) /* Channel */
 493     {
 494       if ((param[0] == 'c' || param[0] == 'C')
 495           && (param[1] == 'h' || param[1] == 'H')
 496           && ISDIGIT (param[2]))
 497         param += 2;
 498     }
 499   else if (arg == A_S) /* Special purpose register */
 500     {
 501       if ((param[0] == 's' || param[0] == 'S')
 502           && (param[1] == 'p' || param[1] == 'P')
 503           && ISDIGIT (param[2]))
 504         param += 2;
 505     }
 506
 507   if (ISDIGIT (*param))
 508     {
 509       regno = 0;
 510       while (ISDIGIT (*param))
 511         regno = regno * 10 + *param++ - '0';
 512     }
 513   else
 514     {
 515       struct reg_name *rn;
 516       unsigned int i, n, l = 0;
 517
 518       if (arg == A_H) /* Channel */
 519         {
 520           rn = ch_reg_name;
 521           n = sizeof (ch_reg_name) / sizeof (*ch_reg_name);
 522         }
 523       else if (arg == A_S) /* Special purpose register */
 524         {
 525           rn = sp_reg_name;
 526           n = sizeof (sp_reg_name) / sizeof (*sp_reg_name);
 527         }
 528       else
 529         {
 530           rn = reg_name;
 531           n = sizeof (reg_name) / sizeof (*reg_name);
 532         }
 533       regno = 128;
 534       for (i = 0; i < n; i++)
 535         if (rn[i].length > l
 536             && 0 == strncasecmp (param, rn[i].name, rn[i].length))
 537           {
 538             l = rn[i].length;
 539             regno = rn[i].regno;
 540           }
 541       param += l;
 542     }
 543
 544   if (!use_dd2
 545       && arg == A_H)
 546     {
 547       if (regno == 11)
 548         as_bad (_("'SPU_RdEventMask' (channel 11) is only available in DD2.0 or higher."));
 549       else if (regno == 12)
 550         as_bad (_("'MFC_RdTagMask' (channel 12) is only available in DD2.0 or higher."));
 551     }
 552
 553   if (regno < 128)
 554     {
 555       insn->opcode |= regno << arg_encode[arg].pos;
 556       if ((!saw_prefix && syntax_reg == 1)
 557           || (saw_prefix && syntax_reg == 2))
 558         syntax_reg |= 4;
 559       syntax_reg |= saw_prefix ? 1 : 2;
 560       return param;
 561     }
 562
 563   if (accept_expr)
 564     {
 565       char *save_ptr;
 566       expressionS ex;
 567       save_ptr = input_line_pointer;
 568       input_line_pointer = (char *)param;
 569       expression (&ex);
 570       param = input_line_pointer;
 571       input_line_pointer = save_ptr;
 572       if (ex.X_op == O_register || ex.X_op == O_constant)
 573         {
 574           insn->opcode |= ex.X_add_number << arg_encode[arg].pos;
 575           return param;
 576         }
 577     }
 578   return 0;
 579 }
 580
 581 static const char *
 582 get_imm (const char *param, struct spu_insn *insn, int arg)
 583 {
 584   int val;
 585   char *save_ptr;
 586   int low = 0, high = 0;
 587   int reloc_i = insn->reloc_arg[0] >= 0 ? 1 : 0;
 588
 589   if (strncasecmp (param, "%lo(", 4) == 0)
 590     {
 591       param += 3;
 592       low = 1;
 593       as_warn (_("Using old style, %%lo(expr), please change to PPC style, expr@l."));
 594     }
 595   else if (strncasecmp (param, "%hi(", 4) == 0)
 596     {
 597       param += 3;
 598       high = 1;
 599       as_warn (_("Using old style, %%hi(expr), please change to PPC style, expr@h."));
 600     }
 601   else if (strncasecmp (param, "%pic(", 5) == 0)
 602     {
 603       /* Currently we expect %pic(expr) == expr, so do nothing here.
 604          i.e. for code loaded at address 0 $toc will be 0.  */
 605       param += 4;
 606     }
 607
 608   if (*param == '$')
 609     {
 610       /* Symbols can start with $, but if this symbol matches a register
 611          name, it's probably a mistake.  The only way to avoid this
 612          warning is to rename the symbol.  */
 613       struct spu_insn tmp_insn;
 614       const char *np = get_reg (param, &tmp_insn, arg, 0);
 615
 616       if (np)
 617         syntax_error_param = np;
 618     }
 619
 620   save_ptr = input_line_pointer;
 621   input_line_pointer = (char *) param;
 622   expression (&insn->exp[reloc_i]);
 623   param = input_line_pointer;
 624   input_line_pointer = save_ptr;
 625
 626   /* Similar to ppc_elf_suffix in tc-ppc.c.  We have so few cases to
 627      handle we do it inlined here. */
 628   if (param[0] == '@' && !ISALNUM (param[2]) && param[2] != '@')
 629     {
 630       if (param[1] == 'h' || param[1] == 'H')
 631         {
 632           high = 1;
 633           param += 2;
 634         }
 635       else if (param[1] == 'l' || param[1] == 'L')
 636         {
 637           low = 1;
 638           param += 2;
 639         }
 640     }
 641
 642   if (insn->exp[reloc_i].X_op == O_constant)
 643     {
 644       val = insn->exp[reloc_i].X_add_number;
 645
 646       if (emulate_apuasm)
 647         {
 648           /* Convert the value to a format we expect. */
 649           val <<= arg_encode[arg].rshift;
 650           if (arg == A_U7A)
 651             val = 173 - val;
 652           else if (arg == A_U7B)
 653             val = 155 - val;
 654         }
 655
 656       if (high)
 657         val = val >> 16;
 658       else if (low)
 659         val = val & 0xffff;
 660
 661       /* Warn about out of range expressions. */
 662       {
 663         int hi = arg_encode[arg].hi;
 664         int lo = arg_encode[arg].lo;
 665         int whi = arg_encode[arg].whi;
 666         int wlo = arg_encode[arg].wlo;
 667
 668         if (hi > lo && (val < lo || val > hi))
 669           as_fatal (_("Constant expression %d out of range, [%d, %d]."),
 670                     val, lo, hi);
 671         else if (whi > wlo && (val < wlo || val > whi))
 672           as_warn (_("Constant expression %d out of range, [%d, %d]."),
 673                    val, wlo, whi);
 674       }
 675
 676       if (arg == A_U7A)
 677         val = 173 - val;
 678       else if (arg == A_U7B)
 679         val = 155 - val;
 680
 681       /* Branch hints have a split encoding.  Do the bottom part. */
 682       if (arg == A_S11 || arg == A_S11I)
 683         insn->opcode |= ((val >> 2) & 0x7f);
 684
 685       insn->opcode |= (((val >> arg_encode[arg].rshift)
 686                         & ((1 << arg_encode[arg].size) - 1))
 687                        << arg_encode[arg].pos);
 688     }
 689   else
 690     {
 691       insn->reloc_arg[reloc_i] = arg;
 692       if (high)
 693         insn->reloc[reloc_i] = BFD_RELOC_SPU_HI16;
 694       else if (low)
 695         insn->reloc[reloc_i] = BFD_RELOC_SPU_LO16;
 696       else
 697         insn->reloc[reloc_i] = arg_encode[arg].reloc;
 698     }
 699
 700   return param;
 701 }
 702
 703 char *
 704 md_atof (int type, char *litP, int *sizeP)
 705 {
 706   return ieee_md_atof (type, litP, sizeP, TRUE);
 707 }
 708
 709 #ifndef WORKING_DOT_WORD
 710 int md_short_jump_size = 4;
 711
 712 void
 713 md_create_short_jump (char *ptr,
 714                       addressT from_addr ATTRIBUTE_UNUSED,
 715                       addressT to_addr ATTRIBUTE_UNUSED,
 716                       fragS *frag,
 717                       symbolS *to_symbol)
 718 {
 719   ptr[0] = (char) 0xc0;
 720   ptr[1] = 0x00;
 721   ptr[2] = 0x00;
 722   ptr[3] = 0x00;
 723   fix_new (frag,
 724            ptr - frag->fr_literal,
 725            4,
 726            to_symbol,
 727            (offsetT) 0,
 728            0,
 729            BFD_RELOC_SPU_PCREL16);
 730 }
 731
 732 int md_long_jump_size = 4;
 733
 734 void
 735 md_create_long_jump (char *ptr,
 736                      addressT from_addr ATTRIBUTE_UNUSED,
 737                      addressT to_addr ATTRIBUTE_UNUSED,
 738                      fragS *frag,
 739                      symbolS *to_symbol)
 740 {
 741   ptr[0] = (char) 0xc0;
 742   ptr[1] = 0x00;
 743   ptr[2] = 0x00;
 744   ptr[3] = 0x00;
 745   fix_new (frag,
 746            ptr - frag->fr_literal,
 747            4,
 748            to_symbol,
 749            (offsetT) 0,
 750            0,
 751            BFD_RELOC_SPU_PCREL16);
 752 }
 753 #endif
 754
 755 /* Support @ppu on symbols referenced in .int/.long/.word/.quad.  */
 756 static void
 757 spu_cons (int nbytes)
 758 {
 759   expressionS exp;
 760
 761   if (is_it_end_of_statement ())
 762     {
 763       demand_empty_rest_of_line ();
 764       return;
 765     }
 766
 767   do
 768     {
 769       deferred_expression (&exp);
 770       if ((exp.X_op == O_symbol
 771            || exp.X_op == O_constant)
 772           && strncasecmp (input_line_pointer, "@ppu", 4) == 0)
 773         {
 774           char *p = frag_more (nbytes);
 775           enum bfd_reloc_code_real reloc;
 776
 777           /* Check for identifier@suffix+constant.  */
 778           input_line_pointer += 4;
 779           if (*input_line_pointer == '-' || *input_line_pointer == '+')
 780             {
 781               expressionS new_exp;
 782
 783               expression (&new_exp);
 784               if (new_exp.X_op == O_constant)
 785                 exp.X_add_number += new_exp.X_add_number;
 786             }
 787
 788           reloc = nbytes == 4 ? BFD_RELOC_SPU_PPU32 : BFD_RELOC_SPU_PPU64;
 789           fix_new_exp (frag_now, p - frag_now->fr_literal, nbytes,
 790                        &exp, 0, reloc);
 791         }
 792       else
 793         emit_expr (&exp, nbytes);
 794     }
 795   while (*input_line_pointer++ == ',');
 796
 797   /* Put terminator back into stream.  */
 798   input_line_pointer--;
 799   demand_empty_rest_of_line ();
 800 }
 801
 802 int
 803 md_estimate_size_before_relax (fragS *fragP ATTRIBUTE_UNUSED,
 804                                segT segment_type ATTRIBUTE_UNUSED)
 805 {
 806   as_fatal (_("Relaxation should never occur"));
 807   return -1;
 808 }
 809
 810 /* If while processing a fixup, a reloc really needs to be created,
 811    then it is done here.  */
 812
 813 arelent *
 814 tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED, fixS *fixp)
 815 {
 816   arelent *reloc;
 817   reloc = (arelent *) xmalloc (sizeof (arelent));
 818   reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
 819   if (fixp->fx_addsy)
 820     *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
 821   else if (fixp->fx_subsy)
 822     *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_subsy);
 823   else
 824     abort ();
 825   reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
 826   reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
 827   if (reloc->howto == (reloc_howto_type *) NULL)
 828     {
 829       as_bad_where (fixp->fx_file, fixp->fx_line,
 830                     _("reloc %d not supported by object file format"),
 831                     (int) fixp->fx_r_type);
 832       return NULL;
 833     }
 834   reloc->addend = fixp->fx_addnumber;
 835   return reloc;
 836 }
 837
 838 /* Round up a section's size to the appropriate boundary.  */
 839
 840 valueT
 841 md_section_align (segT seg, valueT size)
 842 {
 843   int align = bfd_get_section_alignment (stdoutput, seg);
 844   valueT mask = ((valueT) 1 << align) - 1;
 845
 846   return (size + mask) & ~mask;
 847 }
 848
 849 /* Where a PC relative offset is calculated from.  On the spu they
 850    are calculated from the beginning of the branch instruction.  */
 851
 852 long
 853 md_pcrel_from (fixS *fixp)
 854 {
 855   return fixp->fx_frag->fr_address + fixp->fx_where;
 856 }
 857
 858 /* Fill in rs_align_code fragments.  */
 859
 860 void
 861 spu_handle_align (fragS *fragp)
 862 {
 863   static const unsigned char nop_pattern[8] = {
 864     0x40, 0x20, 0x00, 0x00, /* even nop */
 865     0x00, 0x20, 0x00, 0x00, /* odd  nop */
 866   };
 867
 868   int bytes;
 869   char *p;
 870
 871   if (fragp->fr_type != rs_align_code)
 872     return;
 873
 874   bytes = fragp->fr_next->fr_address - fragp->fr_address - fragp->fr_fix;
 875   p = fragp->fr_literal + fragp->fr_fix;
 876
 877   if (bytes & 3)
 878     {
 879       int fix = bytes & 3;
 880       memset (p, 0, fix);
 881       p += fix;
 882       bytes -= fix;
 883       fragp->fr_fix += fix;
 884     }
 885   if (bytes & 4)
 886     {
 887       memcpy (p, &nop_pattern[4], 4);
 888       p += 4;
 889       bytes -= 4;
 890       fragp->fr_fix += 4;
 891     }
 892
 893   memcpy (p, nop_pattern, 8);
 894   fragp->fr_var = 8;
 895 }
 896
 897 void
 898 md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED)
 899 {
 900   unsigned int res;
 901   valueT val = *valP;
 902   char *place = fixP->fx_where + fixP->fx_frag->fr_literal;
 903
 904   if (fixP->fx_subsy != (symbolS *) NULL)
 905     {
 906       /* We can't actually support subtracting a symbol.  */
 907       as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex"));
 908     }
 909
 910   if (fixP->fx_addsy != NULL)
 911     {
 912       if (fixP->fx_pcrel)
 913         {
 914           /* Hack around bfd_install_relocation brain damage.  */
 915           val += fixP->fx_frag->fr_address + fixP->fx_where;
 916
 917           switch (fixP->fx_r_type)
 918             {
 919             case BFD_RELOC_32:
 920               fixP->fx_r_type = BFD_RELOC_32_PCREL;
 921               break;
 922
 923             case BFD_RELOC_SPU_PCREL16:
 924             case BFD_RELOC_SPU_PCREL9a:
 925             case BFD_RELOC_SPU_PCREL9b:
 926             case BFD_RELOC_32_PCREL:
 927               break;
 928
 929             default:
 930               as_bad_where (fixP->fx_file, fixP->fx_line,
 931                             _("expression too complex"));
 932               break;
 933             }
 934         }
 935     }
 936
 937   fixP->fx_addnumber = val;
 938
 939   if (fixP->fx_r_type == BFD_RELOC_SPU_PPU32
 940       || fixP->fx_r_type == BFD_RELOC_SPU_PPU64)
 941     return;
 942
 943   if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0)
 944     {
 945       fixP->fx_done = 1;
 946       res = 0;
 947       if (fixP->tc_fix_data.arg_format > A_P)
 948         {
 949           int hi = arg_encode[fixP->tc_fix_data.arg_format].hi;
 950           int lo = arg_encode[fixP->tc_fix_data.arg_format].lo;
 951           if (hi > lo && ((offsetT) val < lo || (offsetT) val > hi))
 952             as_bad_where (fixP->fx_file, fixP->fx_line,
 953                           "Relocation doesn't fit. (relocation value = 0x%lx)",
 954                           (long) val);
 955         }
 956
 957       switch (fixP->fx_r_type)
 958         {
 959         case BFD_RELOC_8:
 960           md_number_to_chars (place, val, 1);
 961           return;
 962
 963         case BFD_RELOC_16:
 964           md_number_to_chars (place, val, 2);
 965           return;
 966
 967         case BFD_RELOC_32:
 968         case BFD_RELOC_32_PCREL:
 969           md_number_to_chars (place, val, 4);
 970           return;
 971
 972         case BFD_RELOC_64:
 973           md_number_to_chars (place, val, 8);
 974           return;
 975
 976         case BFD_RELOC_SPU_IMM7:
 977           res = (val & 0x7f) << 14;
 978           break;
 979
 980         case BFD_RELOC_SPU_IMM8:
 981           res = (val & 0xff) << 14;
 982           break;
 983
 984         case BFD_RELOC_SPU_IMM10:
 985           res = (val & 0x3ff) << 14;
 986           break;
 987
 988         case BFD_RELOC_SPU_IMM10W:
 989           res = (val & 0x3ff0) << 10;
 990           break;
 991
 992         case BFD_RELOC_SPU_IMM16:
 993           res = (val & 0xffff) << 7;
 994           break;
 995
 996         case BFD_RELOC_SPU_IMM16W:
 997           res = (val & 0x3fffc) << 5;
 998           break;
 999
1000         case BFD_RELOC_SPU_IMM18:
1001           res = (val & 0x3ffff) << 7;
1002           break;
1003
1004         case BFD_RELOC_SPU_PCREL9a:
1005           res = ((val & 0x1fc) >> 2) | ((val & 0x600) << 14);
1006           break;
1007
1008         case BFD_RELOC_SPU_PCREL9b:
1009           res = ((val & 0x1fc) >> 2) | ((val & 0x600) << 5);
1010           break;
1011
1012         case BFD_RELOC_SPU_PCREL16:
1013           res = (val & 0x3fffc) << 5;
1014           break;
1015
1016         case BFD_RELOC_SPU_HI16:
1017           res = (val >> 9) & 0x7fff80;
1018           break;
1019
1020         case BFD_RELOC_SPU_LO16:
1021           res = (val << 7) & 0x7fff80;
1022           break;
1023
1024         default:
1025           as_bad_where (fixP->fx_file, fixP->fx_line,
1026                         _("reloc %d not supported by object file format"),
1027                         (int) fixP->fx_r_type);
1028         }
1029
1030       if (res != 0)
1031         {
1032           place[0] |= (res >> 24) & 0xff;
1033           place[1] |= (res >> 16) & 0xff;
1034           place[2] |= (res >> 8) & 0xff;
1035           place[3] |= (res) & 0xff;
1036         }
1037     }
1038 }