gas/config/tc-spu.c

   1 /* spu.c -- Assembler for the IBM Synergistic Processing Unit (SPU)
   2
   3    Copyright (C) 2006-2020 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   /* initialize hash table */
 116
 117   op_hash = str_htab_create ();
 118
 119   /* loop until you see the end of the list */
 120
 121   for (i = 0; i < spu_num_opcodes; i++)
 122     /* hash each mnemonic and record its position */
 123     if (str_hash_find (op_hash, spu_opcodes[i].mnemonic) == NULL)
 124       str_hash_insert (op_hash, spu_opcodes[i].mnemonic,
 125                        (void *) &spu_opcodes[i]);
 126 }
 127 \f
 128 const char *md_shortopts = "";
 129 struct option md_longopts[] = {
 130 #define OPTION_APUASM (OPTION_MD_BASE)
 131   {"apuasm", no_argument, NULL, OPTION_APUASM},
 132 #define OPTION_DD2 (OPTION_MD_BASE+1)
 133   {"mdd2.0", no_argument, NULL, OPTION_DD2},
 134 #define OPTION_DD1 (OPTION_MD_BASE+2)
 135   {"mdd1.0", no_argument, NULL, OPTION_DD1},
 136 #define OPTION_DD3 (OPTION_MD_BASE+3)
 137   {"mdd3.0", no_argument, NULL, OPTION_DD3},
 138   { NULL, no_argument, NULL, 0 }
 139 };
 140 size_t md_longopts_size = sizeof (md_longopts);
 141
 142 /* When set (by -apuasm) our assembler emulates the behaviour of apuasm.
 143  * e.g. don't add bias to float conversion and don't right shift
 144  * immediate values. */
 145 static int emulate_apuasm;
 146
 147 /* Use the dd2.0 instructions set.  The only differences are some new
 148  * register names and the orx insn */
 149 static int use_dd2 = 1;
 150
 151 int
 152 md_parse_option (int c, const char *arg ATTRIBUTE_UNUSED)
 153 {
 154   switch (c)
 155     {
 156     case OPTION_APUASM:
 157       emulate_apuasm = 1;
 158       break;
 159     case OPTION_DD3:
 160       use_dd2 = 1;
 161       break;
 162     case OPTION_DD2:
 163       use_dd2 = 1;
 164       break;
 165     case OPTION_DD1:
 166       use_dd2 = 0;
 167       break;
 168     default:
 169       return 0;
 170     }
 171   return 1;
 172 }
 173
 174 void
 175 md_show_usage (FILE *stream)
 176 {
 177   fputs (_("\
 178 SPU options:\n\
 179   --apuasm                emulate behaviour of apuasm\n"),
 180         stream);
 181 }
 182 \f
 183
 184 struct arg_encode {
 185   int size;
 186   int pos;
 187   int rshift;
 188   int lo, hi;
 189   int wlo, whi;
 190   bfd_reloc_code_real_type reloc;
 191 };
 192
 193 static struct arg_encode arg_encode[A_MAX] = {
 194   {  7,  0, 0,       0,    127,    0,   -1,  0 }, /* A_T */
 195   {  7,  7, 0,       0,    127,    0,   -1,  0 }, /* A_A */
 196   {  7, 14, 0,       0,    127,    0,   -1,  0 }, /* A_B */
 197   {  7, 21, 0,       0,    127,    0,   -1,  0 }, /* A_C */
 198   {  7,  7, 0,       0,    127,    0,   -1,  0 }, /* A_S */
 199   {  7,  7, 0,       0,    127,    0,   -1,  0 }, /* A_H */
 200   {  0,  0, 0,       0,     -1,    0,   -1,  0 }, /* A_P */
 201   {  7, 14, 0,       0,     -1,    0,   -1,  BFD_RELOC_SPU_IMM7 }, /* A_S3 */
 202   {  7, 14, 0,     -32,     31,  -31,    0,  BFD_RELOC_SPU_IMM7 }, /* A_S6 */
 203   {  7, 14, 0,       0,     -1,    0,   -1,  BFD_RELOC_SPU_IMM7 }, /* A_S7N */
 204   {  7, 14, 0,     -64,     63,  -63,    0,  BFD_RELOC_SPU_IMM7 }, /* A_S7 */
 205   {  8, 14, 0,       0,    127,    0,   -1,  BFD_RELOC_SPU_IMM8 }, /* A_U7A */
 206   {  8, 14, 0,       0,    127,    0,   -1,  BFD_RELOC_SPU_IMM8 }, /* A_U7B */
 207   { 10, 14, 0,    -512,    511, -128,  255,  BFD_RELOC_SPU_IMM10 }, /* A_S10B */
 208   { 10, 14, 0,    -512,    511,    0,   -1,  BFD_RELOC_SPU_IMM10 }, /* A_S10 */
 209   {  2, 23, 9,   -1024,   1023,    0,   -1,  BFD_RELOC_SPU_PCREL9a }, /* A_S11 */
 210   {  2, 14, 9,   -1024,   1023,    0,   -1,  BFD_RELOC_SPU_PCREL9b }, /* A_S11I */
 211   { 10, 14, 4,   -8192,   8191,    0,   -1,  BFD_RELOC_SPU_IMM10W }, /* A_S14 */
 212   { 16,  7, 0,  -32768,  32767,    0,   -1,  BFD_RELOC_SPU_IMM16 }, /* A_S16 */
 213   { 16,  7, 2, -131072, 262143,    0,   -1,  BFD_RELOC_SPU_IMM16W }, /* A_S18 */
 214   { 16,  7, 2, -262144, 262143,    0,   -1,  BFD_RELOC_SPU_PCREL16 }, /* A_R18 */
 215   {  7, 14, 0,       0,     -1,    0,   -1,  BFD_RELOC_SPU_IMM7 }, /* A_U3 */
 216   {  7, 14, 0,       0,    127,    0,   31,  BFD_RELOC_SPU_IMM7 }, /* A_U5 */
 217   {  7, 14, 0,       0,    127,    0,   63,  BFD_RELOC_SPU_IMM7 }, /* A_U6 */
 218   {  7, 14, 0,       0,     -1,    0,   -1,  BFD_RELOC_SPU_IMM7 }, /* A_U7 */
 219   { 14,  0, 0,       0,  16383,    0,   -1,  0 }, /* A_U14 */
 220   { 16,  7, 0,  -32768,  65535,    0,   -1,  BFD_RELOC_SPU_IMM16 }, /* A_X16 */
 221   { 18,  7, 0,       0, 262143,    0,   -1,  BFD_RELOC_SPU_IMM18 }, /* A_U18 */
 222 };
 223
 224 /* Some flags for handling errors.  This is very hackish and added after
 225  * the fact. */
 226 static int syntax_error_arg;
 227 static const char *syntax_error_param;
 228 static int syntax_reg;
 229
 230 static char *
 231 insn_fmt_string (struct spu_opcode *format)
 232 {
 233   static char buf[64];
 234   int len = 0;
 235   int i;
 236
 237   len += sprintf (&buf[len], "%s\t", format->mnemonic);
 238   for (i = 1; i <= format->arg[0]; i++)
 239     {
 240       int arg = format->arg[i];
 241       const char *exp;
 242       if (i > 1 && arg != A_P && format->arg[i-1] != A_P)
 243         buf[len++] =  ',';
 244       if (arg == A_P)
 245         exp = "(";
 246       else if (arg < A_P)
 247         exp = i == syntax_error_arg ? "REG" : "reg";
 248       else
 249         exp = i == syntax_error_arg ? "IMM" : "imm";
 250       len += sprintf (&buf[len], "%s", exp);
 251       if (i > 1 && format->arg[i-1] == A_P)
 252         buf[len++] =  ')';
 253     }
 254   buf[len] = 0;
 255   return buf;
 256 }
 257
 258 void
 259 md_assemble (char *op)
 260 {
 261   char *param, *thisfrag;
 262   char c;
 263   struct spu_opcode *format;
 264   struct spu_insn insn;
 265   int i;
 266
 267   gas_assert (op);
 268
 269   /* skip over instruction to find parameters */
 270
 271   for (param = op; *param != 0 && !ISSPACE (*param); param++)
 272     ;
 273   c = *param;
 274   *param = 0;
 275
 276   if (c != 0 && c != '\n')
 277     param++;
 278
 279   /* try to find the instruction in the hash table */
 280
 281   if ((format = (struct spu_opcode *) str_hash_find (op_hash, op)) == NULL)
 282     {
 283       as_bad (_("Invalid mnemonic '%s'"), op);
 284       return;
 285     }
 286
 287   if (!use_dd2 && strcmp (format->mnemonic, "orx") == 0)
 288     {
 289       as_bad (_("'%s' is only available in DD2.0 or higher."), op);
 290       return;
 291     }
 292
 293   while (1)
 294     {
 295       /* try parsing this instruction into insn */
 296       for (i = 0; i < MAX_RELOCS; i++)
 297         {
 298           insn.exp[i].X_add_symbol = 0;
 299           insn.exp[i].X_op_symbol = 0;
 300           insn.exp[i].X_add_number = 0;
 301           insn.exp[i].X_op = O_illegal;
 302           insn.reloc_arg[i] = -1;
 303           insn.reloc[i] = BFD_RELOC_NONE;
 304         }
 305       insn.opcode = format->opcode;
 306       insn.tag = (enum spu_insns) (format - spu_opcodes);
 307
 308       syntax_error_arg = 0;
 309       syntax_error_param = 0;
 310       syntax_reg = 0;
 311       if (calcop (format, param, &insn))
 312         break;
 313
 314       /* if it doesn't parse try the next instruction */
 315       if (!strcmp (format[0].mnemonic, format[1].mnemonic))
 316         format++;
 317       else
 318         {
 319           int parg = format[0].arg[syntax_error_arg-1];
 320
 321           as_fatal (_("Error in argument %d.  Expecting:  \"%s\""),
 322                     syntax_error_arg - (parg == A_P),
 323                     insn_fmt_string (format));
 324           return;
 325         }
 326     }
 327
 328   if ((syntax_reg & 4)
 329       && ! (insn.tag == M_RDCH
 330             || insn.tag == M_RCHCNT
 331             || insn.tag == M_WRCH))
 332     as_warn (_("Mixing register syntax, with and without '$'."));
 333   if (syntax_error_param)
 334     {
 335       const char *d = syntax_error_param;
 336       while (*d != '$')
 337         d--;
 338       as_warn (_("Treating '%-*s' as a symbol."), (int)(syntax_error_param - d), d);
 339     }
 340
 341   if (brinfo != 0
 342       && (insn.tag <= M_BRASL
 343           || (insn.tag >= M_BRZ && insn.tag <= M_BRHNZ))
 344       && (insn.opcode & 0x7ff80) == 0
 345       && (insn.reloc_arg[0] == A_R18
 346           || insn.reloc_arg[0] == A_S18
 347           || insn.reloc_arg[1] == A_R18
 348           || insn.reloc_arg[1] == A_S18))
 349     insn.opcode |= brinfo << 7;
 350
 351   /* grow the current frag and plop in the opcode */
 352
 353   thisfrag = frag_more (4);
 354   md_number_to_chars (thisfrag, insn.opcode, 4);
 355
 356   /* if this instruction requires labels mark it for later */
 357
 358   for (i = 0; i < MAX_RELOCS; i++)
 359     if (insn.reloc_arg[i] >= 0)
 360       {
 361         fixS *fixP;
 362         bfd_reloc_code_real_type reloc = insn.reloc[i];
 363         int pcrel = 0;
 364
 365         if (reloc == BFD_RELOC_SPU_PCREL9a
 366             || reloc == BFD_RELOC_SPU_PCREL9b
 367             || reloc == BFD_RELOC_SPU_PCREL16)
 368           pcrel = 1;
 369         fixP = fix_new_exp (frag_now,
 370                             thisfrag - frag_now->fr_literal,
 371                             4,
 372                             &insn.exp[i],
 373                             pcrel,
 374                             reloc);
 375         fixP->tc_fix_data.arg_format = insn.reloc_arg[i];
 376         fixP->tc_fix_data.insn_tag = insn.tag;
 377       }
 378   dwarf2_emit_insn (4);
 379
 380   /* .brinfo lasts exactly one instruction.  */
 381   brinfo = 0;
 382 }
 383
 384 static int
 385 calcop (struct spu_opcode *format, const char *param, struct spu_insn *insn)
 386 {
 387   int i;
 388   int paren = 0;
 389   int arg;
 390
 391   for (i = 1; i <= format->arg[0]; i++)
 392     {
 393       arg = format->arg[i];
 394       syntax_error_arg = i;
 395
 396       while (ISSPACE (*param))
 397         param++;
 398       if (*param == 0 || *param == ',')
 399         return 0;
 400       if (arg < A_P)
 401         param = get_reg (param, insn, arg, 1);
 402       else if (arg > A_P)
 403         param = get_imm (param, insn, arg);
 404       else if (arg == A_P)
 405         {
 406           paren++;
 407           if ('(' != *param++)
 408             return 0;
 409         }
 410
 411       if (!param)
 412         return 0;
 413
 414       while (ISSPACE (*param))
 415         param++;
 416
 417       if (arg != A_P && paren)
 418         {
 419           paren--;
 420           if (')' != *param++)
 421             return 0;
 422         }
 423       else if (i < format->arg[0]
 424                && format->arg[i] != A_P
 425                && format->arg[i+1] != A_P)
 426         {
 427           if (',' != *param++)
 428             {
 429               syntax_error_arg++;
 430               return 0;
 431             }
 432         }
 433     }
 434   while (ISSPACE (*param))
 435     param++;
 436   return !paren && (*param == 0 || *param == '\n');
 437 }
 438
 439 struct reg_name {
 440     unsigned int regno;
 441     unsigned int length;
 442     char name[32];
 443 };
 444
 445 #define REG_NAME(NO,NM) { NO, sizeof (NM) - 1, NM }
 446
 447 static struct reg_name reg_name[] = {
 448   REG_NAME (0, "lr"),  /* link register */
 449   REG_NAME (1, "sp"),  /* stack pointer */
 450   REG_NAME (0, "rp"),  /* link register */
 451   REG_NAME (127, "fp"),  /* frame pointer */
 452 };
 453
 454 static struct reg_name sp_reg_name[] = {
 455 };
 456
 457 static struct reg_name ch_reg_name[] = {
 458   REG_NAME (  0, "SPU_RdEventStat"),
 459   REG_NAME (  1, "SPU_WrEventMask"),
 460   REG_NAME (  2, "SPU_WrEventAck"),
 461   REG_NAME (  3, "SPU_RdSigNotify1"),
 462   REG_NAME (  4, "SPU_RdSigNotify2"),
 463   REG_NAME (  7, "SPU_WrDec"),
 464   REG_NAME (  8, "SPU_RdDec"),
 465   REG_NAME ( 11, "SPU_RdEventMask"), /* DD2.0 only */
 466   REG_NAME ( 13, "SPU_RdMachStat"),
 467   REG_NAME ( 14, "SPU_WrSRR0"),
 468   REG_NAME ( 15, "SPU_RdSRR0"),
 469   REG_NAME ( 28, "SPU_WrOutMbox"),
 470   REG_NAME ( 29, "SPU_RdInMbox"),
 471   REG_NAME ( 30, "SPU_WrOutIntrMbox"),
 472   REG_NAME (  9, "MFC_WrMSSyncReq"),
 473   REG_NAME ( 12, "MFC_RdTagMask"),   /* DD2.0 only */
 474   REG_NAME ( 16, "MFC_LSA"),
 475   REG_NAME ( 17, "MFC_EAH"),
 476   REG_NAME ( 18, "MFC_EAL"),
 477   REG_NAME ( 19, "MFC_Size"),
 478   REG_NAME ( 20, "MFC_TagID"),
 479   REG_NAME ( 21, "MFC_Cmd"),
 480   REG_NAME ( 22, "MFC_WrTagMask"),
 481   REG_NAME ( 23, "MFC_WrTagUpdate"),
 482   REG_NAME ( 24, "MFC_RdTagStat"),
 483   REG_NAME ( 25, "MFC_RdListStallStat"),
 484   REG_NAME ( 26, "MFC_WrListStallAck"),
 485   REG_NAME ( 27, "MFC_RdAtomicStat"),
 486 };
 487 #undef REG_NAME
 488
 489 static const char *
 490 get_reg (const char *param, struct spu_insn *insn, int arg, int accept_expr)
 491 {
 492   unsigned regno;
 493   int saw_prefix = 0;
 494
 495   if (*param == '$')
 496     {
 497       saw_prefix = 1;
 498       param++;
 499     }
 500
 501   if (arg == A_H) /* Channel */
 502     {
 503       if ((param[0] == 'c' || param[0] == 'C')
 504           && (param[1] == 'h' || param[1] == 'H')
 505           && ISDIGIT (param[2]))
 506         param += 2;
 507     }
 508   else if (arg == A_S) /* Special purpose register */
 509     {
 510       if ((param[0] == 's' || param[0] == 'S')
 511           && (param[1] == 'p' || param[1] == 'P')
 512           && ISDIGIT (param[2]))
 513         param += 2;
 514     }
 515
 516   if (ISDIGIT (*param))
 517     {
 518       regno = 0;
 519       while (ISDIGIT (*param))
 520         regno = regno * 10 + *param++ - '0';
 521     }
 522   else
 523     {
 524       struct reg_name *rn;
 525       unsigned int i, n, l = 0;
 526
 527       if (arg == A_H) /* Channel */
 528         {
 529           rn = ch_reg_name;
 530           n = sizeof (ch_reg_name) / sizeof (*ch_reg_name);
 531         }
 532       else if (arg == A_S) /* Special purpose register */
 533         {
 534           rn = sp_reg_name;
 535           n = sizeof (sp_reg_name) / sizeof (*sp_reg_name);
 536         }
 537       else
 538         {
 539           rn = reg_name;
 540           n = sizeof (reg_name) / sizeof (*reg_name);
 541         }
 542       regno = 128;
 543       for (i = 0; i < n; i++)
 544         if (rn[i].length > l
 545             && 0 == strncasecmp (param, rn[i].name, rn[i].length))
 546           {
 547             l = rn[i].length;
 548             regno = rn[i].regno;
 549           }
 550       param += l;
 551     }
 552
 553   if (!use_dd2
 554       && arg == A_H)
 555     {
 556       if (regno == 11)
 557         as_bad (_("'SPU_RdEventMask' (channel 11) is only available in DD2.0 or higher."));
 558       else if (regno == 12)
 559         as_bad (_("'MFC_RdTagMask' (channel 12) is only available in DD2.0 or higher."));
 560     }
 561
 562   if (regno < 128)
 563     {
 564       insn->opcode |= regno << arg_encode[arg].pos;
 565       if ((!saw_prefix && syntax_reg == 1)
 566           || (saw_prefix && syntax_reg == 2))
 567         syntax_reg |= 4;
 568       syntax_reg |= saw_prefix ? 1 : 2;
 569       return param;
 570     }
 571
 572   if (accept_expr)
 573     {
 574       char *save_ptr;
 575       expressionS ex;
 576       save_ptr = input_line_pointer;
 577       input_line_pointer = (char *)param;
 578       expression (&ex);
 579       param = input_line_pointer;
 580       input_line_pointer = save_ptr;
 581       if (ex.X_op == O_register || ex.X_op == O_constant)
 582         {
 583           insn->opcode |= ex.X_add_number << arg_encode[arg].pos;
 584           return param;
 585         }
 586     }
 587   return 0;
 588 }
 589
 590 static const char *
 591 get_imm (const char *param, struct spu_insn *insn, int arg)
 592 {
 593   int val;
 594   char *save_ptr;
 595   int low = 0, high = 0;
 596   int reloc_i = insn->reloc_arg[0] >= 0 ? 1 : 0;
 597
 598   if (strncasecmp (param, "%lo(", 4) == 0)
 599     {
 600       param += 3;
 601       low = 1;
 602       as_warn (_("Using old style, %%lo(expr), please change to PPC style, expr@l."));
 603     }
 604   else if (strncasecmp (param, "%hi(", 4) == 0)
 605     {
 606       param += 3;
 607       high = 1;
 608       as_warn (_("Using old style, %%hi(expr), please change to PPC style, expr@h."));
 609     }
 610   else if (strncasecmp (param, "%pic(", 5) == 0)
 611     {
 612       /* Currently we expect %pic(expr) == expr, so do nothing here.
 613          i.e. for code loaded at address 0 $toc will be 0.  */
 614       param += 4;
 615     }
 616
 617   if (*param == '$')
 618     {
 619       /* Symbols can start with $, but if this symbol matches a register
 620          name, it's probably a mistake.  The only way to avoid this
 621          warning is to rename the symbol.  */
 622       struct spu_insn tmp_insn;
 623       const char *np = get_reg (param, &tmp_insn, arg, 0);
 624
 625       if (np)
 626         syntax_error_param = np;
 627     }
 628
 629   save_ptr = input_line_pointer;
 630   input_line_pointer = (char *) param;
 631   expression (&insn->exp[reloc_i]);
 632   param = input_line_pointer;
 633   input_line_pointer = save_ptr;
 634
 635   /* Similar to ppc_elf_suffix in tc-ppc.c.  We have so few cases to
 636      handle we do it inlined here. */
 637   if (param[0] == '@' && !ISALNUM (param[2]) && param[2] != '@')
 638     {
 639       if (param[1] == 'h' || param[1] == 'H')
 640         {
 641           high = 1;
 642           param += 2;
 643         }
 644       else if (param[1] == 'l' || param[1] == 'L')
 645         {
 646           low = 1;
 647           param += 2;
 648         }
 649     }
 650
 651   if (insn->exp[reloc_i].X_op == O_constant)
 652     {
 653       val = insn->exp[reloc_i].X_add_number;
 654
 655       if (emulate_apuasm)
 656         {
 657           /* Convert the value to a format we expect. */
 658           val <<= arg_encode[arg].rshift;
 659           if (arg == A_U7A)
 660             val = 173 - val;
 661           else if (arg == A_U7B)
 662             val = 155 - val;
 663         }
 664
 665       if (high)
 666         val = val >> 16;
 667       else if (low)
 668         val = val & 0xffff;
 669
 670       /* Warn about out of range expressions. */
 671       {
 672         int hi = arg_encode[arg].hi;
 673         int lo = arg_encode[arg].lo;
 674         int whi = arg_encode[arg].whi;
 675         int wlo = arg_encode[arg].wlo;
 676
 677         if (hi > lo && (val < lo || val > hi))
 678           as_fatal (_("Constant expression %d out of range, [%d, %d]."),
 679                     val, lo, hi);
 680         else if (whi > wlo && (val < wlo || val > whi))
 681           as_warn (_("Constant expression %d out of range, [%d, %d]."),
 682                    val, wlo, whi);
 683       }
 684
 685       if (arg == A_U7A)
 686         val = 173 - val;
 687       else if (arg == A_U7B)
 688         val = 155 - val;
 689
 690       /* Branch hints have a split encoding.  Do the bottom part. */
 691       if (arg == A_S11 || arg == A_S11I)
 692         insn->opcode |= ((val >> 2) & 0x7f);
 693
 694       insn->opcode |= (((val >> arg_encode[arg].rshift)
 695                         & ((1 << arg_encode[arg].size) - 1))
 696                        << arg_encode[arg].pos);
 697     }
 698   else
 699     {
 700       insn->reloc_arg[reloc_i] = arg;
 701       if (high)
 702         insn->reloc[reloc_i] = BFD_RELOC_SPU_HI16;
 703       else if (low)
 704         insn->reloc[reloc_i] = BFD_RELOC_SPU_LO16;
 705       else
 706         insn->reloc[reloc_i] = arg_encode[arg].reloc;
 707     }
 708
 709   return param;
 710 }
 711
 712 const char *
 713 md_atof (int type, char *litP, int *sizeP)
 714 {
 715   return ieee_md_atof (type, litP, sizeP, TRUE);
 716 }
 717
 718 #ifndef WORKING_DOT_WORD
 719 int md_short_jump_size = 4;
 720
 721 void
 722 md_create_short_jump (char *ptr,
 723                       addressT from_addr ATTRIBUTE_UNUSED,
 724                       addressT to_addr ATTRIBUTE_UNUSED,
 725                       fragS *frag,
 726                       symbolS *to_symbol)
 727 {
 728   ptr[0] = (char) 0xc0;
 729   ptr[1] = 0x00;
 730   ptr[2] = 0x00;
 731   ptr[3] = 0x00;
 732   fix_new (frag,
 733            ptr - frag->fr_literal,
 734            4,
 735            to_symbol,
 736            (offsetT) 0,
 737            0,
 738            BFD_RELOC_SPU_PCREL16);
 739 }
 740
 741 int md_long_jump_size = 4;
 742
 743 void
 744 md_create_long_jump (char *ptr,
 745                      addressT from_addr ATTRIBUTE_UNUSED,
 746                      addressT to_addr ATTRIBUTE_UNUSED,
 747                      fragS *frag,
 748                      symbolS *to_symbol)
 749 {
 750   ptr[0] = (char) 0xc0;
 751   ptr[1] = 0x00;
 752   ptr[2] = 0x00;
 753   ptr[3] = 0x00;
 754   fix_new (frag,
 755            ptr - frag->fr_literal,
 756            4,
 757            to_symbol,
 758            (offsetT) 0,
 759            0,
 760            BFD_RELOC_SPU_PCREL16);
 761 }
 762 #endif
 763
 764 /* Handle .brinfo <priority>,<lrlive>.  */
 765 static void
 766 spu_brinfo (int ignore ATTRIBUTE_UNUSED)
 767 {
 768   addressT priority;
 769   addressT lrlive;
 770
 771   priority = get_absolute_expression ();
 772   SKIP_WHITESPACE ();
 773
 774   lrlive = 0;
 775   if (*input_line_pointer == ',')
 776     {
 777       ++input_line_pointer;
 778       lrlive = get_absolute_expression ();
 779     }
 780
 781   if (priority > 0x1fff)
 782     {
 783       as_bad (_("invalid priority '%lu'"), (unsigned long) priority);
 784       priority = 0;
 785     }
 786
 787   if (lrlive > 7)
 788     {
 789       as_bad (_("invalid lrlive '%lu'"), (unsigned long) lrlive);
 790       lrlive = 0;
 791     }
 792
 793   brinfo = (lrlive << 13) | priority;
 794   demand_empty_rest_of_line ();
 795 }
 796
 797 /* Support @ppu on symbols referenced in .int/.long/.word/.quad.  */
 798 static void
 799 spu_cons (int nbytes)
 800 {
 801   expressionS exp;
 802
 803   if (is_it_end_of_statement ())
 804     {
 805       demand_empty_rest_of_line ();
 806       return;
 807     }
 808
 809   do
 810     {
 811       char *save = input_line_pointer;
 812
 813       /* Use deferred_expression here so that an expression involving
 814          a symbol that happens to be defined already as an spu symbol,
 815          is not resolved.  */
 816       deferred_expression (&exp);
 817       if ((exp.X_op == O_symbol
 818            || exp.X_op == O_constant)
 819           && strncasecmp (input_line_pointer, "@ppu", 4) == 0)
 820         {
 821           char *p = frag_more (nbytes);
 822           enum bfd_reloc_code_real reloc;
 823
 824           /* Check for identifier@suffix+constant.  */
 825           input_line_pointer += 4;
 826           if (*input_line_pointer == '-' || *input_line_pointer == '+')
 827             {
 828               expressionS new_exp;
 829
 830               save = input_line_pointer;
 831               expression (&new_exp);
 832               if (new_exp.X_op == O_constant)
 833                 exp.X_add_number += new_exp.X_add_number;
 834               else
 835                 input_line_pointer = save;
 836             }
 837
 838           reloc = nbytes == 4 ? BFD_RELOC_SPU_PPU32 : BFD_RELOC_SPU_PPU64;
 839           fix_new_exp (frag_now, p - frag_now->fr_literal, nbytes,
 840                        &exp, 0, reloc);
 841         }
 842       else
 843         {
 844           /* Don't use deferred_expression for anything else.
 845              deferred_expression won't evaulate dot at the point it is
 846              used.  */
 847           input_line_pointer = save;
 848           expression (&exp);
 849           emit_expr (&exp, nbytes);
 850         }
 851     }
 852   while (*input_line_pointer++ == ',');
 853
 854   /* Put terminator back into stream.  */
 855   input_line_pointer--;
 856   demand_empty_rest_of_line ();
 857 }
 858
 859 int
 860 md_estimate_size_before_relax (fragS *fragP ATTRIBUTE_UNUSED,
 861                                segT segment_type ATTRIBUTE_UNUSED)
 862 {
 863   as_fatal (_("Relaxation should never occur"));
 864   return -1;
 865 }
 866
 867 /* If while processing a fixup, a reloc really needs to be created,
 868    then it is done here.  */
 869
 870 arelent *
 871 tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED, fixS *fixp)
 872 {
 873   arelent *reloc;
 874   reloc = XNEW (arelent);
 875   reloc->sym_ptr_ptr = XNEW (asymbol *);
 876   if (fixp->fx_addsy)
 877     *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
 878   else if (fixp->fx_subsy)
 879     *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_subsy);
 880   else
 881     abort ();
 882   reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
 883   reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
 884   if (reloc->howto == (reloc_howto_type *) NULL)
 885     {
 886       as_bad_where (fixp->fx_file, fixp->fx_line,
 887                     _("reloc %d not supported by object file format"),
 888                     (int) fixp->fx_r_type);
 889       return NULL;
 890     }
 891   reloc->addend = fixp->fx_addnumber;
 892   return reloc;
 893 }
 894
 895 /* Round up a section's size to the appropriate boundary.  */
 896
 897 valueT
 898 md_section_align (segT seg, valueT size)
 899 {
 900   int align = bfd_section_alignment (seg);
 901   valueT mask = ((valueT) 1 << align) - 1;
 902
 903   return (size + mask) & ~mask;
 904 }
 905
 906 /* Where a PC relative offset is calculated from.  On the spu they
 907    are calculated from the beginning of the branch instruction.  */
 908
 909 long
 910 md_pcrel_from (fixS *fixp)
 911 {
 912   return fixp->fx_frag->fr_address + fixp->fx_where;
 913 }
 914
 915 /* Fill in rs_align_code fragments.  */
 916
 917 void
 918 spu_handle_align (fragS *fragp)
 919 {
 920   static const unsigned char nop_pattern[8] = {
 921     0x40, 0x20, 0x00, 0x00, /* even nop */
 922     0x00, 0x20, 0x00, 0x00, /* odd  nop */
 923   };
 924
 925   int bytes;
 926   char *p;
 927
 928   if (fragp->fr_type != rs_align_code)
 929     return;
 930
 931   bytes = fragp->fr_next->fr_address - fragp->fr_address - fragp->fr_fix;
 932   p = fragp->fr_literal + fragp->fr_fix;
 933
 934   if (bytes & 3)
 935     {
 936       int fix = bytes & 3;
 937       memset (p, 0, fix);
 938       p += fix;
 939       bytes -= fix;
 940       fragp->fr_fix += fix;
 941     }
 942   if (bytes & 4)
 943     {
 944       memcpy (p, &nop_pattern[4], 4);
 945       p += 4;
 946       bytes -= 4;
 947       fragp->fr_fix += 4;
 948     }
 949
 950   memcpy (p, nop_pattern, 8);
 951   fragp->fr_var = 8;
 952 }
 953
 954 void
 955 md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED)
 956 {
 957   unsigned int res;
 958   unsigned int mask;
 959   valueT val = *valP;
 960   char *place = fixP->fx_where + fixP->fx_frag->fr_literal;
 961
 962   if (fixP->fx_subsy != (symbolS *) NULL)
 963     {
 964       /* We can't actually support subtracting a symbol.  */
 965       as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex"));
 966     }
 967
 968   if (fixP->fx_addsy != NULL)
 969     {
 970       if (fixP->fx_pcrel)
 971         {
 972           /* Hack around bfd_install_relocation brain damage.  */
 973           val += fixP->fx_frag->fr_address + fixP->fx_where;
 974
 975           switch (fixP->fx_r_type)
 976             {
 977             case BFD_RELOC_32:
 978               fixP->fx_r_type = BFD_RELOC_32_PCREL;
 979               break;
 980
 981             case BFD_RELOC_SPU_PCREL16:
 982             case BFD_RELOC_SPU_PCREL9a:
 983             case BFD_RELOC_SPU_PCREL9b:
 984             case BFD_RELOC_32_PCREL:
 985               break;
 986
 987             default:
 988               as_bad_where (fixP->fx_file, fixP->fx_line,
 989                             _("expression too complex"));
 990               break;
 991             }
 992         }
 993     }
 994
 995   fixP->fx_addnumber = val;
 996
 997   if (fixP->fx_r_type == BFD_RELOC_SPU_PPU32
 998       || fixP->fx_r_type == BFD_RELOC_SPU_PPU64
 999       || fixP->fx_r_type == BFD_RELOC_SPU_ADD_PIC)
1000     return;
1001
1002   if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0)
1003     {
1004       fixP->fx_done = 1;
1005       res = 0;
1006       mask = 0;
1007       if (fixP->tc_fix_data.arg_format > A_P)
1008         {
1009           int hi = arg_encode[fixP->tc_fix_data.arg_format].hi;
1010           int lo = arg_encode[fixP->tc_fix_data.arg_format].lo;
1011           if (hi > lo && ((offsetT) val < lo || (offsetT) val > hi))
1012             as_bad_where (fixP->fx_file, fixP->fx_line,
1013                           _("Relocation doesn't fit. (relocation value = 0x%lx)"),
1014                           (long) val);
1015         }
1016
1017       switch (fixP->fx_r_type)
1018         {
1019         case BFD_RELOC_8:
1020           md_number_to_chars (place, val, 1);
1021           return;
1022
1023         case BFD_RELOC_16:
1024           md_number_to_chars (place, val, 2);
1025           return;
1026
1027         case BFD_RELOC_32:
1028         case BFD_RELOC_32_PCREL:
1029           md_number_to_chars (place, val, 4);
1030           return;
1031
1032         case BFD_RELOC_64:
1033           md_number_to_chars (place, val, 8);
1034           return;
1035
1036         case BFD_RELOC_SPU_IMM7:
1037           res = val << 14;
1038           mask = 0x7f << 14;
1039           break;
1040
1041         case BFD_RELOC_SPU_IMM8:
1042           res = val << 14;
1043           mask = 0xff << 14;
1044           break;
1045
1046         case BFD_RELOC_SPU_IMM10:
1047           res = val << 14;
1048           mask = 0x3ff << 14;
1049           break;
1050
1051         case BFD_RELOC_SPU_IMM10W:
1052           res = val << 10;
1053           mask = 0x3ff0 << 10;
1054           break;
1055
1056         case BFD_RELOC_SPU_IMM16:
1057           res = val << 7;
1058           mask = 0xffff << 7;
1059           break;
1060
1061         case BFD_RELOC_SPU_IMM16W:
1062           res = val << 5;
1063           mask = 0x3fffc << 5;
1064           break;
1065
1066         case BFD_RELOC_SPU_IMM18:
1067           res = val << 7;
1068           mask = 0x3ffff << 7;
1069           break;
1070
1071         case BFD_RELOC_SPU_PCREL9a:
1072           res = ((val & 0x1fc) >> 2) | ((val & 0x600) << 14);
1073           mask = (0x1fc >> 2) | (0x600 << 14);
1074           break;
1075
1076         case BFD_RELOC_SPU_PCREL9b:
1077           res = ((val & 0x1fc) >> 2) | ((val & 0x600) << 5);
1078           mask = (0x1fc >> 2) | (0x600 << 5);
1079           break;
1080
1081         case BFD_RELOC_SPU_PCREL16:
1082           res = val << 5;
1083           mask = 0x3fffc << 5;
1084           break;
1085
1086         case BFD_RELOC_SPU_HI16:
1087           res = val >> 9;
1088           mask = 0xffff << 7;
1089           break;
1090
1091         case BFD_RELOC_SPU_LO16:
1092           res = val << 7;
1093           mask = 0xffff << 7;
1094           break;
1095
1096         default:
1097           as_bad_where (fixP->fx_file, fixP->fx_line,
1098                         _("reloc %d not supported by object file format"),
1099                         (int) fixP->fx_r_type);
1100         }
1101
1102       res &= mask;
1103       place[0] = (place[0] & (~mask >> 24)) | ((res >> 24) & 0xff);
1104       place[1] = (place[1] & (~mask >> 16)) | ((res >> 16) & 0xff);
1105       place[2] = (place[2] & (~mask >> 8)) | ((res >> 8) & 0xff);
1106       place[3] = (place[3] & ~mask) | (res & 0xff);
1107     }
1108 }