gas/config/tc-spu.c

   1 /* spu.c -- Assembler for the IBM Synergistic Processing Unit (SPU)
   2
   3    Copyright 2006, 2007, 2008, 2009 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_brinfo (int);
  57 static void spu_cons (int);
  58
  59 extern char *myname;
  60 static struct hash_control *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   {"file", (void (*) (int)) dwarf2_directive_file, 0 },
 105   {"loc", dwarf2_directive_loc, 0},
 106   {0,0,0}
 107 };
 108
 109 /* Bits plugged into branch instruction offset field.  */
 110 unsigned int brinfo;
 111
 112 void
 113 md_begin (void)
 114 {
 115   const char *retval = NULL;
 116   int i;
 117
 118   /* initialize hash table */
 119
 120   op_hash = hash_new ();
 121
 122   /* loop until you see the end of the list */
 123
 124   for (i = 0; i < spu_num_opcodes; i++)
 125     {
 126       /* hash each mnemonic and record its position */
 127
 128       retval = hash_insert (op_hash, spu_opcodes[i].mnemonic,
 129                             (void *) &spu_opcodes[i]);
 130
 131       if (retval != NULL && strcmp (retval, "exists") != 0)
 132         as_fatal (_("Can't hash instruction '%s':%s"),
 133                   spu_opcodes[i].mnemonic, retval);
 134     }
 135 }
 136 \f
 137 const char *md_shortopts = "";
 138 struct option md_longopts[] = {
 139 #define OPTION_APUASM (OPTION_MD_BASE)
 140   {"apuasm", no_argument, NULL, OPTION_APUASM},
 141 #define OPTION_DD2 (OPTION_MD_BASE+1)
 142   {"mdd2.0", no_argument, NULL, OPTION_DD2},
 143 #define OPTION_DD1 (OPTION_MD_BASE+2)
 144   {"mdd1.0", no_argument, NULL, OPTION_DD1},
 145 #define OPTION_DD3 (OPTION_MD_BASE+3)
 146   {"mdd3.0", no_argument, NULL, OPTION_DD3},
 147   { NULL, no_argument, NULL, 0 }
 148 };
 149 size_t md_longopts_size = sizeof (md_longopts);
 150
 151 /* When set (by -apuasm) our assembler emulates the behaviour of apuasm.
 152  * e.g. don't add bias to float conversion and don't right shift
 153  * immediate values. */
 154 static int emulate_apuasm;
 155
 156 /* Use the dd2.0 instructions set.  The only differences are some new
 157  * register names and the orx insn */
 158 static int use_dd2 = 1;
 159
 160 int
 161 md_parse_option (int c, char *arg ATTRIBUTE_UNUSED)
 162 {
 163   switch (c)
 164     {
 165     case OPTION_APUASM:
 166       emulate_apuasm = 1;
 167       break;
 168     case OPTION_DD3:
 169       use_dd2 = 1;
 170       break;
 171     case OPTION_DD2:
 172       use_dd2 = 1;
 173       break;
 174     case OPTION_DD1:
 175       use_dd2 = 0;
 176       break;
 177     default:
 178       return 0;
 179     }
 180   return 1;
 181 }
 182
 183 void
 184 md_show_usage (FILE *stream)
 185 {
 186   fputs (_("\
 187 SPU options:\n\
 188   --apuasm                emulate behaviour of apuasm\n"),
 189         stream);
 190 }
 191 \f
 192
 193 struct arg_encode {
 194   int size;
 195   int pos;
 196   int rshift;
 197   int lo, hi;
 198   int wlo, whi;
 199   bfd_reloc_code_real_type reloc;
 200 };
 201
 202 static struct arg_encode arg_encode[A_MAX] = {
 203   {  7,  0, 0,       0,    127,    0,   -1,  0 }, /* A_T */
 204   {  7,  7, 0,       0,    127,    0,   -1,  0 }, /* A_A */
 205   {  7, 14, 0,       0,    127,    0,   -1,  0 }, /* A_B */
 206   {  7, 21, 0,       0,    127,    0,   -1,  0 }, /* A_C */
 207   {  7,  7, 0,       0,    127,    0,   -1,  0 }, /* A_S */
 208   {  7,  7, 0,       0,    127,    0,   -1,  0 }, /* A_H */
 209   {  0,  0, 0,       0,     -1,    0,   -1,  0 }, /* A_P */
 210   {  7, 14, 0,       0,     -1,    0,   -1,  BFD_RELOC_SPU_IMM7 }, /* A_S3 */
 211   {  7, 14, 0,     -32,     31,  -31,    0,  BFD_RELOC_SPU_IMM7 }, /* A_S6 */
 212   {  7, 14, 0,       0,     -1,    0,   -1,  BFD_RELOC_SPU_IMM7 }, /* A_S7N */
 213   {  7, 14, 0,     -64,     63,  -63,    0,  BFD_RELOC_SPU_IMM7 }, /* A_S7 */
 214   {  8, 14, 0,       0,    127,    0,   -1,  BFD_RELOC_SPU_IMM8 }, /* A_U7A */
 215   {  8, 14, 0,       0,    127,    0,   -1,  BFD_RELOC_SPU_IMM8 }, /* A_U7B */
 216   { 10, 14, 0,    -512,    511, -128,  255,  BFD_RELOC_SPU_IMM10 }, /* A_S10B */
 217   { 10, 14, 0,    -512,    511,    0,   -1,  BFD_RELOC_SPU_IMM10 }, /* A_S10 */
 218   {  2, 23, 9,   -1024,   1023,    0,   -1,  BFD_RELOC_SPU_PCREL9a }, /* A_S11 */
 219   {  2, 14, 9,   -1024,   1023,    0,   -1,  BFD_RELOC_SPU_PCREL9b }, /* A_S11I */
 220   { 10, 14, 4,   -8192,   8191,    0,   -1,  BFD_RELOC_SPU_IMM10W }, /* A_S14 */
 221   { 16,  7, 0,  -32768,  32767,    0,   -1,  BFD_RELOC_SPU_IMM16 }, /* A_S16 */
 222   { 16,  7, 2, -131072, 262143,    0,   -1,  BFD_RELOC_SPU_IMM16W }, /* A_S18 */
 223   { 16,  7, 2, -262144, 262143,    0,   -1,  BFD_RELOC_SPU_PCREL16 }, /* A_R18 */
 224   {  7, 14, 0,       0,     -1,    0,   -1,  BFD_RELOC_SPU_IMM7 }, /* A_U3 */
 225   {  7, 14, 0,       0,    127,    0,   31,  BFD_RELOC_SPU_IMM7 }, /* A_U5 */
 226   {  7, 14, 0,       0,    127,    0,   63,  BFD_RELOC_SPU_IMM7 }, /* A_U6 */
 227   {  7, 14, 0,       0,     -1,    0,   -1,  BFD_RELOC_SPU_IMM7 }, /* A_U7 */
 228   { 14,  0, 0,       0,  16383,    0,   -1,  0 }, /* A_U14 */
 229   { 16,  7, 0,  -32768,  65535,    0,   -1,  BFD_RELOC_SPU_IMM16 }, /* A_X16 */
 230   { 18,  7, 0,       0, 262143,    0,   -1,  BFD_RELOC_SPU_IMM18 }, /* A_U18 */
 231 };
 232
 233 /* Some flags for handling errors.  This is very hackish and added after
 234  * the fact. */
 235 static int syntax_error_arg;
 236 static const char *syntax_error_param;
 237 static int syntax_reg;
 238
 239 static char *
 240 insn_fmt_string (struct spu_opcode *format)
 241 {
 242   static char buf[64];
 243   int len = 0;
 244   int i;
 245
 246   len += sprintf (&buf[len], "%s\t", format->mnemonic);
 247   for (i = 1; i <= format->arg[0]; i++)
 248     {
 249       int arg = format->arg[i];
 250       char *exp;
 251       if (i > 1 && arg != A_P && format->arg[i-1] != A_P)
 252         buf[len++] =  ',';
 253       if (arg == A_P)
 254         exp = "(";
 255       else if (arg < A_P)
 256         exp = i == syntax_error_arg ? "REG" : "reg";
 257       else
 258         exp = i == syntax_error_arg ? "IMM" : "imm";
 259       len += sprintf (&buf[len], "%s", exp);
 260       if (i > 1 && format->arg[i-1] == A_P)
 261         buf[len++] =  ')';
 262     }
 263   buf[len] = 0;
 264   return buf;
 265 }
 266
 267 void
 268 md_assemble (char *op)
 269 {
 270   char *param, *thisfrag;
 271   char c;
 272   struct spu_opcode *format;
 273   struct spu_insn insn;
 274   int i;
 275
 276   assert (op);
 277
 278   /* skip over instruction to find parameters */
 279
 280   for (param = op; *param != 0 && !ISSPACE (*param); param++)
 281     ;
 282   c = *param;
 283   *param = 0;
 284
 285   if (c != 0 && c != '\n')
 286     param++;
 287
 288   /* try to find the instruction in the hash table */
 289
 290   if ((format = (struct spu_opcode *) hash_find (op_hash, op)) == NULL)
 291     {
 292       as_bad (_("Invalid mnemonic '%s'"), op);
 293       return;
 294     }
 295
 296   if (!use_dd2 && strcmp (format->mnemonic, "orx") == 0)
 297     {
 298       as_bad (_("'%s' is only available in DD2.0 or higher."), op);
 299       return;
 300     }
 301
 302   while (1)
 303     {
 304       /* try parsing this instruction into insn */
 305       for (i = 0; i < MAX_RELOCS; i++)
 306         {
 307           insn.exp[i].X_add_symbol = 0;
 308           insn.exp[i].X_op_symbol = 0;
 309           insn.exp[i].X_add_number = 0;
 310           insn.exp[i].X_op = O_illegal;
 311           insn.reloc_arg[i] = -1;
 312           insn.reloc[i] = BFD_RELOC_NONE;
 313         }
 314       insn.opcode = format->opcode;
 315       insn.tag = (enum spu_insns) (format - spu_opcodes);
 316
 317       syntax_error_arg = 0;
 318       syntax_error_param = 0;
 319       syntax_reg = 0;
 320       if (calcop (format, param, &insn))
 321         break;
 322
 323       /* if it doesn't parse try the next instruction */
 324       if (!strcmp (format[0].mnemonic, format[1].mnemonic))
 325         format++;
 326       else
 327         {
 328           int parg = format[0].arg[syntax_error_arg-1];
 329
 330           as_fatal (_("Error in argument %d.  Expecting:  \"%s\""),
 331                     syntax_error_arg - (parg == A_P),
 332                     insn_fmt_string (format));
 333           return;
 334         }
 335     }
 336
 337   if ((syntax_reg & 4)
 338       && ! (insn.tag == M_RDCH
 339             || insn.tag == M_RCHCNT
 340             || insn.tag == M_WRCH))
 341     as_warn (_("Mixing register syntax, with and without '$'."));
 342   if (syntax_error_param)
 343     {
 344       const char *d = syntax_error_param;
 345       while (*d != '$')
 346         d--;
 347       as_warn (_("Treating '%-*s' as a symbol."), (int)(syntax_error_param - d), d);
 348     }
 349
 350   if (brinfo != 0
 351       && (insn.tag <= M_BRASL
 352           || (insn.tag >= M_BRZ && insn.tag <= M_BRHNZ))
 353       && (insn.opcode & 0x7ff80) == 0
 354       && (insn.reloc_arg[0] == A_R18
 355           || insn.reloc_arg[0] == A_S18
 356           || insn.reloc_arg[1] == A_R18
 357           || insn.reloc_arg[1] == A_S18))
 358     insn.opcode |= brinfo << 7;
 359
 360   /* grow the current frag and plop in the opcode */
 361
 362   thisfrag = frag_more (4);
 363   md_number_to_chars (thisfrag, insn.opcode, 4);
 364
 365   /* if this instruction requires labels mark it for later */
 366
 367   for (i = 0; i < MAX_RELOCS; i++)
 368     if (insn.reloc_arg[i] >= 0)
 369       {
 370         fixS *fixP;
 371         bfd_reloc_code_real_type reloc = insn.reloc[i];
 372         int pcrel = 0;
 373
 374         if (reloc == BFD_RELOC_SPU_PCREL9a
 375             || reloc == BFD_RELOC_SPU_PCREL9b
 376             || reloc == BFD_RELOC_SPU_PCREL16)
 377           pcrel = 1;
 378         fixP = fix_new_exp (frag_now,
 379                             thisfrag - frag_now->fr_literal,
 380                             4,
 381                             &insn.exp[i],
 382                             pcrel,
 383                             reloc);
 384         fixP->tc_fix_data.arg_format = insn.reloc_arg[i];
 385         fixP->tc_fix_data.insn_tag = insn.tag;
 386       }
 387   dwarf2_emit_insn (4);
 388
 389   /* .brinfo lasts exactly one instruction.  */
 390   brinfo = 0;
 391 }
 392
 393 static int
 394 calcop (struct spu_opcode *format, const char *param, struct spu_insn *insn)
 395 {
 396   int i;
 397   int paren = 0;
 398   int arg;
 399
 400   for (i = 1; i <= format->arg[0]; i++)
 401     {
 402       arg = format->arg[i];
 403       syntax_error_arg = i;
 404
 405       while (ISSPACE (*param))
 406         param++;
 407       if (*param == 0 || *param == ',')
 408         return 0;
 409       if (arg < A_P)
 410         param = get_reg (param, insn, arg, 1);
 411       else if (arg > A_P)
 412         param = get_imm (param, insn, arg);
 413       else if (arg == A_P)
 414         {
 415           paren++;
 416           if ('(' != *param++)
 417             return 0;
 418         }
 419
 420       if (!param)
 421         return 0;
 422
 423       while (ISSPACE (*param))
 424         param++;
 425
 426       if (arg != A_P && paren)
 427         {
 428           paren--;
 429           if (')' != *param++)
 430             return 0;
 431         }
 432       else if (i < format->arg[0]
 433                && format->arg[i] != A_P
 434                && format->arg[i+1] != A_P)
 435         {
 436           if (',' != *param++)
 437             {
 438               syntax_error_arg++;
 439               return 0;
 440             }
 441         }
 442     }
 443   while (ISSPACE (*param))
 444     param++;
 445   return !paren && (*param == 0 || *param == '\n');
 446 }
 447
 448 struct reg_name {
 449     unsigned int regno;
 450     unsigned int length;
 451     char name[32];
 452 };
 453
 454 #define REG_NAME(NO,NM) { NO, sizeof (NM) - 1, NM }
 455
 456 static struct reg_name reg_name[] = {
 457   REG_NAME (0, "lr"),  /* link register */
 458   REG_NAME (1, "sp"),  /* stack pointer */
 459   REG_NAME (0, "rp"),  /* link register */
 460   REG_NAME (127, "fp"),  /* frame pointer */
 461 };
 462
 463 static struct reg_name sp_reg_name[] = {
 464 };
 465
 466 static struct reg_name ch_reg_name[] = {
 467   REG_NAME (  0, "SPU_RdEventStat"),
 468   REG_NAME (  1, "SPU_WrEventMask"),
 469   REG_NAME (  2, "SPU_WrEventAck"),
 470   REG_NAME (  3, "SPU_RdSigNotify1"),
 471   REG_NAME (  4, "SPU_RdSigNotify2"),
 472   REG_NAME (  7, "SPU_WrDec"),
 473   REG_NAME (  8, "SPU_RdDec"),
 474   REG_NAME ( 11, "SPU_RdEventMask"), /* DD2.0 only */
 475   REG_NAME ( 13, "SPU_RdMachStat"),
 476   REG_NAME ( 14, "SPU_WrSRR0"),
 477   REG_NAME ( 15, "SPU_RdSRR0"),
 478   REG_NAME ( 28, "SPU_WrOutMbox"),
 479   REG_NAME ( 29, "SPU_RdInMbox"),
 480   REG_NAME ( 30, "SPU_WrOutIntrMbox"),
 481   REG_NAME (  9, "MFC_WrMSSyncReq"),
 482   REG_NAME ( 12, "MFC_RdTagMask"),   /* DD2.0 only */
 483   REG_NAME ( 16, "MFC_LSA"),
 484   REG_NAME ( 17, "MFC_EAH"),
 485   REG_NAME ( 18, "MFC_EAL"),
 486   REG_NAME ( 19, "MFC_Size"),
 487   REG_NAME ( 20, "MFC_TagID"),
 488   REG_NAME ( 21, "MFC_Cmd"),
 489   REG_NAME ( 22, "MFC_WrTagMask"),
 490   REG_NAME ( 23, "MFC_WrTagUpdate"),
 491   REG_NAME ( 24, "MFC_RdTagStat"),
 492   REG_NAME ( 25, "MFC_RdListStallStat"),
 493   REG_NAME ( 26, "MFC_WrListStallAck"),
 494   REG_NAME ( 27, "MFC_RdAtomicStat"),
 495 };
 496 #undef REG_NAME
 497
 498 static const char *
 499 get_reg (const char *param, struct spu_insn *insn, int arg, int accept_expr)
 500 {
 501   unsigned regno;
 502   int saw_prefix = 0;
 503
 504   if (*param == '$')
 505     {
 506       saw_prefix = 1;
 507       param++;
 508     }
 509
 510   if (arg == A_H) /* Channel */
 511     {
 512       if ((param[0] == 'c' || param[0] == 'C')
 513           && (param[1] == 'h' || param[1] == 'H')
 514           && ISDIGIT (param[2]))
 515         param += 2;
 516     }
 517   else if (arg == A_S) /* Special purpose register */
 518     {
 519       if ((param[0] == 's' || param[0] == 'S')
 520           && (param[1] == 'p' || param[1] == 'P')
 521           && ISDIGIT (param[2]))
 522         param += 2;
 523     }
 524
 525   if (ISDIGIT (*param))
 526     {
 527       regno = 0;
 528       while (ISDIGIT (*param))
 529         regno = regno * 10 + *param++ - '0';
 530     }
 531   else
 532     {
 533       struct reg_name *rn;
 534       unsigned int i, n, l = 0;
 535
 536       if (arg == A_H) /* Channel */
 537         {
 538           rn = ch_reg_name;
 539           n = sizeof (ch_reg_name) / sizeof (*ch_reg_name);
 540         }
 541       else if (arg == A_S) /* Special purpose register */
 542         {
 543           rn = sp_reg_name;
 544           n = sizeof (sp_reg_name) / sizeof (*sp_reg_name);
 545         }
 546       else
 547         {
 548           rn = reg_name;
 549           n = sizeof (reg_name) / sizeof (*reg_name);
 550         }
 551       regno = 128;
 552       for (i = 0; i < n; i++)
 553         if (rn[i].length > l
 554             && 0 == strncasecmp (param, rn[i].name, rn[i].length))
 555           {
 556             l = rn[i].length;
 557             regno = rn[i].regno;
 558           }
 559       param += l;
 560     }
 561
 562   if (!use_dd2
 563       && arg == A_H)
 564     {
 565       if (regno == 11)
 566         as_bad (_("'SPU_RdEventMask' (channel 11) is only available in DD2.0 or higher."));
 567       else if (regno == 12)
 568         as_bad (_("'MFC_RdTagMask' (channel 12) is only available in DD2.0 or higher."));
 569     }
 570
 571   if (regno < 128)
 572     {
 573       insn->opcode |= regno << arg_encode[arg].pos;
 574       if ((!saw_prefix && syntax_reg == 1)
 575           || (saw_prefix && syntax_reg == 2))
 576         syntax_reg |= 4;
 577       syntax_reg |= saw_prefix ? 1 : 2;
 578       return param;
 579     }
 580
 581   if (accept_expr)
 582     {
 583       char *save_ptr;
 584       expressionS ex;
 585       save_ptr = input_line_pointer;
 586       input_line_pointer = (char *)param;
 587       expression (&ex);
 588       param = input_line_pointer;
 589       input_line_pointer = save_ptr;
 590       if (ex.X_op == O_register || ex.X_op == O_constant)
 591         {
 592           insn->opcode |= ex.X_add_number << arg_encode[arg].pos;
 593           return param;
 594         }
 595     }
 596   return 0;
 597 }
 598
 599 static const char *
 600 get_imm (const char *param, struct spu_insn *insn, int arg)
 601 {
 602   int val;
 603   char *save_ptr;
 604   int low = 0, high = 0;
 605   int reloc_i = insn->reloc_arg[0] >= 0 ? 1 : 0;
 606
 607   if (strncasecmp (param, "%lo(", 4) == 0)
 608     {
 609       param += 3;
 610       low = 1;
 611       as_warn (_("Using old style, %%lo(expr), please change to PPC style, expr@l."));
 612     }
 613   else if (strncasecmp (param, "%hi(", 4) == 0)
 614     {
 615       param += 3;
 616       high = 1;
 617       as_warn (_("Using old style, %%hi(expr), please change to PPC style, expr@h."));
 618     }
 619   else if (strncasecmp (param, "%pic(", 5) == 0)
 620     {
 621       /* Currently we expect %pic(expr) == expr, so do nothing here.
 622          i.e. for code loaded at address 0 $toc will be 0.  */
 623       param += 4;
 624     }
 625
 626   if (*param == '$')
 627     {
 628       /* Symbols can start with $, but if this symbol matches a register
 629          name, it's probably a mistake.  The only way to avoid this
 630          warning is to rename the symbol.  */
 631       struct spu_insn tmp_insn;
 632       const char *np = get_reg (param, &tmp_insn, arg, 0);
 633
 634       if (np)
 635         syntax_error_param = np;
 636     }
 637
 638   save_ptr = input_line_pointer;
 639   input_line_pointer = (char *) param;
 640   expression (&insn->exp[reloc_i]);
 641   param = input_line_pointer;
 642   input_line_pointer = save_ptr;
 643
 644   /* Similar to ppc_elf_suffix in tc-ppc.c.  We have so few cases to
 645      handle we do it inlined here. */
 646   if (param[0] == '@' && !ISALNUM (param[2]) && param[2] != '@')
 647     {
 648       if (param[1] == 'h' || param[1] == 'H')
 649         {
 650           high = 1;
 651           param += 2;
 652         }
 653       else if (param[1] == 'l' || param[1] == 'L')
 654         {
 655           low = 1;
 656           param += 2;
 657         }
 658     }
 659
 660   if (insn->exp[reloc_i].X_op == O_constant)
 661     {
 662       val = insn->exp[reloc_i].X_add_number;
 663
 664       if (emulate_apuasm)
 665         {
 666           /* Convert the value to a format we expect. */
 667           val <<= arg_encode[arg].rshift;
 668           if (arg == A_U7A)
 669             val = 173 - val;
 670           else if (arg == A_U7B)
 671             val = 155 - val;
 672         }
 673
 674       if (high)
 675         val = val >> 16;
 676       else if (low)
 677         val = val & 0xffff;
 678
 679       /* Warn about out of range expressions. */
 680       {
 681         int hi = arg_encode[arg].hi;
 682         int lo = arg_encode[arg].lo;
 683         int whi = arg_encode[arg].whi;
 684         int wlo = arg_encode[arg].wlo;
 685
 686         if (hi > lo && (val < lo || val > hi))
 687           as_fatal (_("Constant expression %d out of range, [%d, %d]."),
 688                     val, lo, hi);
 689         else if (whi > wlo && (val < wlo || val > whi))
 690           as_warn (_("Constant expression %d out of range, [%d, %d]."),
 691                    val, wlo, whi);
 692       }
 693
 694       if (arg == A_U7A)
 695         val = 173 - val;
 696       else if (arg == A_U7B)
 697         val = 155 - val;
 698
 699       /* Branch hints have a split encoding.  Do the bottom part. */
 700       if (arg == A_S11 || arg == A_S11I)
 701         insn->opcode |= ((val >> 2) & 0x7f);
 702
 703       insn->opcode |= (((val >> arg_encode[arg].rshift)
 704                         & ((1 << arg_encode[arg].size) - 1))
 705                        << arg_encode[arg].pos);
 706     }
 707   else
 708     {
 709       insn->reloc_arg[reloc_i] = arg;
 710       if (high)
 711         insn->reloc[reloc_i] = BFD_RELOC_SPU_HI16;
 712       else if (low)
 713         insn->reloc[reloc_i] = BFD_RELOC_SPU_LO16;
 714       else
 715         insn->reloc[reloc_i] = arg_encode[arg].reloc;
 716     }
 717
 718   return param;
 719 }
 720
 721 char *
 722 md_atof (int type, char *litP, int *sizeP)
 723 {
 724   return ieee_md_atof (type, litP, sizeP, TRUE);
 725 }
 726
 727 #ifndef WORKING_DOT_WORD
 728 int md_short_jump_size = 4;
 729
 730 void
 731 md_create_short_jump (char *ptr,
 732                       addressT from_addr ATTRIBUTE_UNUSED,
 733                       addressT to_addr ATTRIBUTE_UNUSED,
 734                       fragS *frag,
 735                       symbolS *to_symbol)
 736 {
 737   ptr[0] = (char) 0xc0;
 738   ptr[1] = 0x00;
 739   ptr[2] = 0x00;
 740   ptr[3] = 0x00;
 741   fix_new (frag,
 742            ptr - frag->fr_literal,
 743            4,
 744            to_symbol,
 745            (offsetT) 0,
 746            0,
 747            BFD_RELOC_SPU_PCREL16);
 748 }
 749
 750 int md_long_jump_size = 4;
 751
 752 void
 753 md_create_long_jump (char *ptr,
 754                      addressT from_addr ATTRIBUTE_UNUSED,
 755                      addressT to_addr ATTRIBUTE_UNUSED,
 756                      fragS *frag,
 757                      symbolS *to_symbol)
 758 {
 759   ptr[0] = (char) 0xc0;
 760   ptr[1] = 0x00;
 761   ptr[2] = 0x00;
 762   ptr[3] = 0x00;
 763   fix_new (frag,
 764            ptr - frag->fr_literal,
 765            4,
 766            to_symbol,
 767            (offsetT) 0,
 768            0,
 769            BFD_RELOC_SPU_PCREL16);
 770 }
 771 #endif
 772
 773 /* Handle .brinfo <priority>,<lrlive>.  */
 774 static void
 775 spu_brinfo (int ignore ATTRIBUTE_UNUSED)
 776 {
 777   addressT priority;
 778   addressT lrlive;
 779
 780   priority = get_absolute_expression ();
 781   SKIP_WHITESPACE ();
 782
 783   lrlive = 0;
 784   if (*input_line_pointer == ',')
 785     {
 786       ++input_line_pointer;
 787       lrlive = get_absolute_expression ();
 788     }
 789
 790   if (priority > 0x1fff)
 791     {
 792       as_bad (_("invalid priority '%lu'"), (unsigned long) priority);
 793       priority = 0;
 794     }
 795
 796   if (lrlive > 7)
 797     {
 798       as_bad (_("invalid lrlive '%lu'"), (unsigned long) lrlive);
 799       lrlive = 0;
 800     }
 801
 802   brinfo = (lrlive << 13) | priority;
 803   demand_empty_rest_of_line ();
 804 }
 805
 806 /* Support @ppu on symbols referenced in .int/.long/.word/.quad.  */
 807 static void
 808 spu_cons (int nbytes)
 809 {
 810   expressionS exp;
 811
 812   if (is_it_end_of_statement ())
 813     {
 814       demand_empty_rest_of_line ();
 815       return;
 816     }
 817
 818   do
 819     {
 820       deferred_expression (&exp);
 821       if ((exp.X_op == O_symbol
 822            || exp.X_op == O_constant)
 823           && strncasecmp (input_line_pointer, "@ppu", 4) == 0)
 824         {
 825           char *p = frag_more (nbytes);
 826           enum bfd_reloc_code_real reloc;
 827
 828           /* Check for identifier@suffix+constant.  */
 829           input_line_pointer += 4;
 830           if (*input_line_pointer == '-' || *input_line_pointer == '+')
 831             {
 832               expressionS new_exp;
 833
 834               expression (&new_exp);
 835               if (new_exp.X_op == O_constant)
 836                 exp.X_add_number += new_exp.X_add_number;
 837             }
 838
 839           reloc = nbytes == 4 ? BFD_RELOC_SPU_PPU32 : BFD_RELOC_SPU_PPU64;
 840           fix_new_exp (frag_now, p - frag_now->fr_literal, nbytes,
 841                        &exp, 0, reloc);
 842         }
 843       else
 844         emit_expr (&exp, nbytes);
 845     }
 846   while (*input_line_pointer++ == ',');
 847
 848   /* Put terminator back into stream.  */
 849   input_line_pointer--;
 850   demand_empty_rest_of_line ();
 851 }
 852
 853 int
 854 md_estimate_size_before_relax (fragS *fragP ATTRIBUTE_UNUSED,
 855                                segT segment_type ATTRIBUTE_UNUSED)
 856 {
 857   as_fatal (_("Relaxation should never occur"));
 858   return -1;
 859 }
 860
 861 /* If while processing a fixup, a reloc really needs to be created,
 862    then it is done here.  */
 863
 864 arelent *
 865 tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED, fixS *fixp)
 866 {
 867   arelent *reloc;
 868   reloc = (arelent *) xmalloc (sizeof (arelent));
 869   reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
 870   if (fixp->fx_addsy)
 871     *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
 872   else if (fixp->fx_subsy)
 873     *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_subsy);
 874   else
 875     abort ();
 876   reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
 877   reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
 878   if (reloc->howto == (reloc_howto_type *) NULL)
 879     {
 880       as_bad_where (fixp->fx_file, fixp->fx_line,
 881                     _("reloc %d not supported by object file format"),
 882                     (int) fixp->fx_r_type);
 883       return NULL;
 884     }
 885   reloc->addend = fixp->fx_addnumber;
 886   return reloc;
 887 }
 888
 889 /* Round up a section's size to the appropriate boundary.  */
 890
 891 valueT
 892 md_section_align (segT seg, valueT size)
 893 {
 894   int align = bfd_get_section_alignment (stdoutput, seg);
 895   valueT mask = ((valueT) 1 << align) - 1;
 896
 897   return (size + mask) & ~mask;
 898 }
 899
 900 /* Where a PC relative offset is calculated from.  On the spu they
 901    are calculated from the beginning of the branch instruction.  */
 902
 903 long
 904 md_pcrel_from (fixS *fixp)
 905 {
 906   return fixp->fx_frag->fr_address + fixp->fx_where;
 907 }
 908
 909 /* Fill in rs_align_code fragments.  */
 910
 911 void
 912 spu_handle_align (fragS *fragp)
 913 {
 914   static const unsigned char nop_pattern[8] = {
 915     0x40, 0x20, 0x00, 0x00, /* even nop */
 916     0x00, 0x20, 0x00, 0x00, /* odd  nop */
 917   };
 918
 919   int bytes;
 920   char *p;
 921
 922   if (fragp->fr_type != rs_align_code)
 923     return;
 924
 925   bytes = fragp->fr_next->fr_address - fragp->fr_address - fragp->fr_fix;
 926   p = fragp->fr_literal + fragp->fr_fix;
 927
 928   if (bytes & 3)
 929     {
 930       int fix = bytes & 3;
 931       memset (p, 0, fix);
 932       p += fix;
 933       bytes -= fix;
 934       fragp->fr_fix += fix;
 935     }
 936   if (bytes & 4)
 937     {
 938       memcpy (p, &nop_pattern[4], 4);
 939       p += 4;
 940       bytes -= 4;
 941       fragp->fr_fix += 4;
 942     }
 943
 944   memcpy (p, nop_pattern, 8);
 945   fragp->fr_var = 8;
 946 }
 947
 948 void
 949 md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED)
 950 {
 951   unsigned int res;
 952   unsigned int mask;
 953   valueT val = *valP;
 954   char *place = fixP->fx_where + fixP->fx_frag->fr_literal;
 955
 956   if (fixP->fx_subsy != (symbolS *) NULL)
 957     {
 958       /* We can't actually support subtracting a symbol.  */
 959       as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex"));
 960     }
 961
 962   if (fixP->fx_addsy != NULL)
 963     {
 964       if (fixP->fx_pcrel)
 965         {
 966           /* Hack around bfd_install_relocation brain damage.  */
 967           val += fixP->fx_frag->fr_address + fixP->fx_where;
 968
 969           switch (fixP->fx_r_type)
 970             {
 971             case BFD_RELOC_32:
 972               fixP->fx_r_type = BFD_RELOC_32_PCREL;
 973               break;
 974
 975             case BFD_RELOC_SPU_PCREL16:
 976             case BFD_RELOC_SPU_PCREL9a:
 977             case BFD_RELOC_SPU_PCREL9b:
 978             case BFD_RELOC_32_PCREL:
 979               break;
 980
 981             default:
 982               as_bad_where (fixP->fx_file, fixP->fx_line,
 983                             _("expression too complex"));
 984               break;
 985             }
 986         }
 987     }
 988
 989   fixP->fx_addnumber = val;
 990
 991   if (fixP->fx_r_type == BFD_RELOC_SPU_PPU32
 992       || fixP->fx_r_type == BFD_RELOC_SPU_PPU64)
 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 }