gcc/defaults.h

   1 /* Definitions of various defaults for tm.h macros.
   2    Copyright (C) 1992, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
   3    2005, 2007, 2008, 2009, 2010
   4    Free Software Foundation, Inc.
   5    Contributed by Ron Guilmette (rfg@monkeys.com)
   6
   7 This file is part of GCC.
   8
   9 GCC is free software; you can redistribute it and/or modify it under
  10 the terms of the GNU General Public License as published by the Free
  11 Software Foundation; either version 3, or (at your option) any later
  12 version.
  13
  14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  17 for more details.
  18
  19 Under Section 7 of GPL version 3, you are granted additional
  20 permissions described in the GCC Runtime Library Exception, version
  21 3.1, as published by the Free Software Foundation.
  22
  23 You should have received a copy of the GNU General Public License and
  24 a copy of the GCC Runtime Library Exception along with this program;
  25 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  26 <http://www.gnu.org/licenses/>.  */
  27
  28 #ifndef GCC_DEFAULTS_H
  29 #define GCC_DEFAULTS_H
  30
  31 /* Store in OUTPUT a string (made with alloca) containing an
  32    assembler-name for a local static variable or function named NAME.
  33    LABELNO is an integer which is different for each call.  */
  34
  35 #ifndef ASM_PN_FORMAT
  36 # ifndef NO_DOT_IN_LABEL
  37 #  define ASM_PN_FORMAT "%s.%lu"
  38 # else
  39 #  ifndef NO_DOLLAR_IN_LABEL
  40 #   define ASM_PN_FORMAT "%s$%lu"
  41 #  else
  42 #   define ASM_PN_FORMAT "__%s_%lu"
  43 #  endif
  44 # endif
  45 #endif /* ! ASM_PN_FORMAT */
  46
  47 #ifndef ASM_FORMAT_PRIVATE_NAME
  48 # define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
  49   do { const char *const name_ = (NAME); \
  50        char *const output_ = (OUTPUT) = \
  51          (char *) alloca (strlen (name_) + 32); \
  52        sprintf (output_, ASM_PN_FORMAT, name_, (unsigned long)(LABELNO)); \
  53   } while (0)
  54 #endif
  55
  56 /* Choose a reasonable default for ASM_OUTPUT_ASCII.  */
  57
  58 #ifndef ASM_OUTPUT_ASCII
  59 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
  60   do {                                                                        \
  61     FILE *_hide_asm_out_file = (MYFILE);                                      \
  62     const unsigned char *_hide_p = (const unsigned char *) (MYSTRING);        \
  63     int _hide_thissize = (MYLENGTH);                                          \
  64     {                                                                         \
  65       FILE *asm_out_file = _hide_asm_out_file;                                \
  66       const unsigned char *p = _hide_p;                                       \
  67       int thissize = _hide_thissize;                                          \
  68       int i;                                                                  \
  69       fprintf (asm_out_file, "\t.ascii \"");                                  \
  70                                                                               \
  71       for (i = 0; i < thissize; i++)                                          \
  72         {                                                                     \
  73           int c = p[i];                                                       \
  74           if (c == '\"' || c == '\\')                                         \
  75             putc ('\\', asm_out_file);                                        \
  76           if (ISPRINT(c))                                                     \
  77             putc (c, asm_out_file);                                           \
  78           else                                                                \
  79             {                                                                 \
  80               fprintf (asm_out_file, "\\%o", c);                              \
  81               /* After an octal-escape, if a digit follows,                   \
  82                  terminate one string constant and start another.             \
  83                  The VAX assembler fails to stop reading the escape           \
  84                  after three digits, so this is the only way we               \
  85                  can get it to parse the data properly.  */                   \
  86               if (i < thissize - 1 && ISDIGIT(p[i + 1]))                      \
  87                 fprintf (asm_out_file, "\"\n\t.ascii \"");                    \
  88           }                                                                   \
  89         }                                                                     \
  90       fprintf (asm_out_file, "\"\n");                                         \
  91     }                                                                         \
  92   }                                                                           \
  93   while (0)
  94 #endif
  95
  96 /* This is how we tell the assembler to equate two values.  */
  97 #ifdef SET_ASM_OP
  98 #ifndef ASM_OUTPUT_DEF
  99 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
 100  do {   fprintf ((FILE), "%s", SET_ASM_OP);                             \
 101         assemble_name (FILE, LABEL1);                                   \
 102         fprintf (FILE, ",");                                            \
 103         assemble_name (FILE, LABEL2);                                   \
 104         fprintf (FILE, "\n");                                           \
 105   } while (0)
 106 #endif
 107 #endif
 108
 109 #ifndef IFUNC_ASM_TYPE
 110 #define IFUNC_ASM_TYPE "gnu_indirect_function"
 111 #endif
 112
 113 #ifndef TLS_COMMON_ASM_OP
 114 #define TLS_COMMON_ASM_OP ".tls_common"
 115 #endif
 116
 117 #if defined (HAVE_AS_TLS) && !defined (ASM_OUTPUT_TLS_COMMON)
 118 #define ASM_OUTPUT_TLS_COMMON(FILE, DECL, NAME, SIZE)                   \
 119   do                                                                    \
 120     {                                                                   \
 121       fprintf ((FILE), "\t%s\t", TLS_COMMON_ASM_OP);                    \
 122       assemble_name ((FILE), (NAME));                                   \
 123       fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n",          \
 124                (SIZE), DECL_ALIGN (DECL) / BITS_PER_UNIT);              \
 125     }                                                                   \
 126   while (0)
 127 #endif
 128
 129 /* Decide whether to defer emitting the assembler output for an equate
 130    of two values.  The default is to not defer output.  */
 131 #ifndef TARGET_DEFERRED_OUTPUT_DEFS
 132 #define TARGET_DEFERRED_OUTPUT_DEFS(DECL,TARGET) false
 133 #endif
 134
 135 /* This is how to output the definition of a user-level label named
 136    NAME, such as the label on variable NAME.  */
 137
 138 #ifndef ASM_OUTPUT_LABEL
 139 #define ASM_OUTPUT_LABEL(FILE,NAME) \
 140   do { assemble_name ((FILE), (NAME)); fputs (":\n", (FILE)); } while (0)
 141 #endif
 142
 143 /* This is how to output the definition of a user-level label named
 144    NAME, such as the label on a function.  */
 145
 146 #ifndef ASM_OUTPUT_FUNCTION_LABEL
 147 #define ASM_OUTPUT_FUNCTION_LABEL(FILE, NAME, DECL) \
 148   ASM_OUTPUT_LABEL ((FILE), (NAME))
 149 #endif
 150
 151 /* Output the definition of a compiler-generated label named NAME.  */
 152 #ifndef ASM_OUTPUT_INTERNAL_LABEL
 153 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,NAME)    \
 154   do {                                          \
 155     assemble_name_raw ((FILE), (NAME));         \
 156     fputs (":\n", (FILE));                      \
 157   } while (0)
 158 #endif
 159
 160 /* This is how to output a reference to a user-level label named NAME.  */
 161
 162 #ifndef ASM_OUTPUT_LABELREF
 163 #define ASM_OUTPUT_LABELREF(FILE,NAME)  asm_fprintf ((FILE), "%U%s", (NAME))
 164 #endif
 165
 166 /* Allow target to print debug info labels specially.  This is useful for
 167    VLIW targets, since debug info labels should go into the middle of
 168    instruction bundles instead of breaking them.  */
 169
 170 #ifndef ASM_OUTPUT_DEBUG_LABEL
 171 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
 172   (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM)
 173 #endif
 174
 175 /* This is how we tell the assembler that a symbol is weak.  */
 176 #ifndef ASM_OUTPUT_WEAK_ALIAS
 177 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
 178 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE)      \
 179   do                                                    \
 180     {                                                   \
 181       ASM_WEAKEN_LABEL (STREAM, NAME);                  \
 182       if (VALUE)                                        \
 183         ASM_OUTPUT_DEF (STREAM, NAME, VALUE);           \
 184     }                                                   \
 185   while (0)
 186 #endif
 187 #endif
 188
 189 /* This is how we tell the assembler that a symbol is a weak alias to
 190    another symbol that doesn't require the other symbol to be defined.
 191    Uses of the former will turn into weak uses of the latter, i.e.,
 192    uses that, in case the latter is undefined, will not cause errors,
 193    and will add it to the symbol table as weak undefined.  However, if
 194    the latter is referenced directly, a strong reference prevails.  */
 195 #ifndef ASM_OUTPUT_WEAKREF
 196 #if defined HAVE_GAS_WEAKREF
 197 #define ASM_OUTPUT_WEAKREF(FILE, DECL, NAME, VALUE)                     \
 198   do                                                                    \
 199     {                                                                   \
 200       fprintf ((FILE), "\t.weakref\t");                                 \
 201       assemble_name ((FILE), (NAME));                                   \
 202       fprintf ((FILE), ",");                                            \
 203       assemble_name ((FILE), (VALUE));                                  \
 204       fprintf ((FILE), "\n");                                           \
 205     }                                                                   \
 206   while (0)
 207 #endif
 208 #endif
 209
 210 /* How to emit a .type directive.  */
 211 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE
 212 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT
 213 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE)   \
 214   do                                                    \
 215     {                                                   \
 216       fputs (TYPE_ASM_OP, STREAM);                      \
 217       assemble_name (STREAM, NAME);                     \
 218       fputs (", ", STREAM);                             \
 219       fprintf (STREAM, TYPE_OPERAND_FMT, TYPE);         \
 220       putc ('\n', STREAM);                              \
 221     }                                                   \
 222   while (0)
 223 #endif
 224 #endif
 225
 226 /* How to emit a .size directive.  */
 227 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE
 228 #ifdef SIZE_ASM_OP
 229 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE)   \
 230   do                                                    \
 231     {                                                   \
 232       HOST_WIDE_INT size_ = (SIZE);                     \
 233       fputs (SIZE_ASM_OP, STREAM);                      \
 234       assemble_name (STREAM, NAME);                     \
 235       fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \
 236     }                                                   \
 237   while (0)
 238
 239 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME)          \
 240   do                                                    \
 241     {                                                   \
 242       fputs (SIZE_ASM_OP, STREAM);                      \
 243       assemble_name (STREAM, NAME);                     \
 244       fputs (", .-", STREAM);                           \
 245       assemble_name (STREAM, NAME);                     \
 246       putc ('\n', STREAM);                              \
 247     }                                                   \
 248   while (0)
 249
 250 #endif
 251 #endif
 252
 253 /* This determines whether or not we support weak symbols.  SUPPORTS_WEAK
 254    must be a preprocessor constant.  */
 255 #ifndef SUPPORTS_WEAK
 256 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
 257 #define SUPPORTS_WEAK 1
 258 #else
 259 #define SUPPORTS_WEAK 0
 260 #endif
 261 #endif
 262
 263 /* This determines whether or not we support weak symbols during target
 264    code generation.  TARGET_SUPPORTS_WEAK can be any valid C expression.  */
 265 #ifndef TARGET_SUPPORTS_WEAK
 266 #define TARGET_SUPPORTS_WEAK (SUPPORTS_WEAK)
 267 #endif
 268
 269 /* This determines whether or not we support the discriminator
 270    attribute in the .loc directive.  */
 271 #ifndef SUPPORTS_DISCRIMINATOR
 272 #ifdef HAVE_GAS_DISCRIMINATOR
 273 #define SUPPORTS_DISCRIMINATOR 1
 274 #else
 275 #define SUPPORTS_DISCRIMINATOR 0
 276 #endif
 277 #endif
 278
 279 /* This determines whether or not we support link-once semantics.  */
 280 #ifndef SUPPORTS_ONE_ONLY
 281 #ifdef MAKE_DECL_ONE_ONLY
 282 #define SUPPORTS_ONE_ONLY 1
 283 #else
 284 #define SUPPORTS_ONE_ONLY 0
 285 #endif
 286 #endif
 287
 288 /* This determines whether weak symbols must be left out of a static
 289    archive's table of contents.  Defining this macro to be nonzero has
 290    the consequence that certain symbols will not be made weak that
 291    otherwise would be.  The C++ ABI requires this macro to be zero;
 292    see the documentation.  */
 293 #ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 294 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
 295 #endif
 296
 297 /* This determines whether or not we need linkonce unwind information.  */
 298 #ifndef TARGET_USES_WEAK_UNWIND_INFO
 299 #define TARGET_USES_WEAK_UNWIND_INFO 0
 300 #endif
 301
 302 /* By default, there is no prefix on user-defined symbols.  */
 303 #ifndef USER_LABEL_PREFIX
 304 #define USER_LABEL_PREFIX ""
 305 #endif
 306
 307 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
 308    provide a weak attribute.  Else define it to nothing.
 309
 310    This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
 311    not available at that time.
 312
 313    Note, this is only for use by target files which we know are to be
 314    compiled by GCC.  */
 315 #ifndef TARGET_ATTRIBUTE_WEAK
 316 # if SUPPORTS_WEAK
 317 #  define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
 318 # else
 319 #  define TARGET_ATTRIBUTE_WEAK
 320 # endif
 321 #endif
 322
 323 /* Determines whether we may use common symbols to represent one-only
 324    semantics (a.k.a. "vague linkage").  */
 325 #ifndef USE_COMMON_FOR_ONE_ONLY
 326 # define USE_COMMON_FOR_ONE_ONLY 1
 327 #endif
 328
 329 /* By default we can assume that all global symbols are in one namespace,
 330    across all shared libraries.  */
 331 #ifndef MULTIPLE_SYMBOL_SPACES
 332 # define MULTIPLE_SYMBOL_SPACES 0
 333 #endif
 334
 335 /* If the target supports init_priority C++ attribute, give
 336    SUPPORTS_INIT_PRIORITY a nonzero value.  */
 337 #ifndef SUPPORTS_INIT_PRIORITY
 338 #define SUPPORTS_INIT_PRIORITY 1
 339 #endif /* SUPPORTS_INIT_PRIORITY */
 340
 341 /* If duplicate library search directories can be removed from a
 342    linker command without changing the linker's semantics, give this
 343    symbol a nonzero.  */
 344 #ifndef LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
 345 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 0
 346 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
 347
 348 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
 349    the rest of the DWARF 2 frame unwind support is also provided.  */
 350 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
 351 #define DWARF2_UNWIND_INFO 1
 352 #endif
 353
 354 /* If we have named sections, and we're using crtstuff to run ctors,
 355    use them for registering eh frame information.  */
 356 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
 357     && !defined(EH_FRAME_IN_DATA_SECTION)
 358 #ifndef EH_FRAME_SECTION_NAME
 359 #define EH_FRAME_SECTION_NAME ".eh_frame"
 360 #endif
 361 #endif
 362
 363 /* On many systems, different EH table encodings are used under
 364    difference circumstances.  Some will require runtime relocations;
 365    some will not.  For those that do not require runtime relocations,
 366    we would like to make the table read-only.  However, since the
 367    read-only tables may need to be combined with read-write tables
 368    that do require runtime relocation, it is not safe to make the
 369    tables read-only unless the linker will merge read-only and
 370    read-write sections into a single read-write section.  If your
 371    linker does not have this ability, but your system is such that no
 372    encoding used with non-PIC code will ever require a runtime
 373    relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in
 374    your target configuration file.  */
 375 #ifndef EH_TABLES_CAN_BE_READ_ONLY
 376 #ifdef HAVE_LD_RO_RW_SECTION_MIXING
 377 #define EH_TABLES_CAN_BE_READ_ONLY 1
 378 #else
 379 #define EH_TABLES_CAN_BE_READ_ONLY 0
 380 #endif
 381 #endif
 382
 383 /* If we have named section and we support weak symbols, then use the
 384    .jcr section for recording java classes which need to be registered
 385    at program start-up time.  */
 386 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
 387 #ifndef JCR_SECTION_NAME
 388 #define JCR_SECTION_NAME ".jcr"
 389 #endif
 390 #endif
 391
 392 /* This decision to use a .jcr section can be overridden by defining
 393    USE_JCR_SECTION to 0 in target file.  This is necessary if target
 394    can define JCR_SECTION_NAME but does not have crtstuff or
 395    linker support for .jcr section.  */
 396 #ifndef TARGET_USE_JCR_SECTION
 397 #ifdef JCR_SECTION_NAME
 398 #define TARGET_USE_JCR_SECTION 1
 399 #else
 400 #define TARGET_USE_JCR_SECTION 0
 401 #endif
 402 #endif
 403
 404 /* Number of hardware registers that go into the DWARF-2 unwind info.
 405    If not defined, equals FIRST_PSEUDO_REGISTER  */
 406
 407 #ifndef DWARF_FRAME_REGISTERS
 408 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
 409 #endif
 410
 411 /* How to renumber registers for dbx and gdb.  If not defined, assume
 412    no renumbering is necessary.  */
 413
 414 #ifndef DBX_REGISTER_NUMBER
 415 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 416 #endif
 417
 418 /* Default sizes for base C types.  If the sizes are different for
 419    your target, you should override these values by defining the
 420    appropriate symbols in your tm.h file.  */
 421
 422 #ifndef BITS_PER_UNIT
 423 #define BITS_PER_UNIT 8
 424 #endif
 425
 426 #ifndef BITS_PER_WORD
 427 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
 428 #endif
 429
 430 #ifndef CHAR_TYPE_SIZE
 431 #define CHAR_TYPE_SIZE BITS_PER_UNIT
 432 #endif
 433
 434 #ifndef BOOL_TYPE_SIZE
 435 /* `bool' has size and alignment `1', on almost all platforms.  */
 436 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
 437 #endif
 438
 439 #ifndef SHORT_TYPE_SIZE
 440 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
 441 #endif
 442
 443 #ifndef INT_TYPE_SIZE
 444 #define INT_TYPE_SIZE BITS_PER_WORD
 445 #endif
 446
 447 #ifndef LONG_TYPE_SIZE
 448 #define LONG_TYPE_SIZE BITS_PER_WORD
 449 #endif
 450
 451 #ifndef LONG_LONG_TYPE_SIZE
 452 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
 453 #endif
 454
 455 #ifndef WCHAR_TYPE_SIZE
 456 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
 457 #endif
 458
 459 #ifndef FLOAT_TYPE_SIZE
 460 #define FLOAT_TYPE_SIZE BITS_PER_WORD
 461 #endif
 462
 463 #ifndef DOUBLE_TYPE_SIZE
 464 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 465 #endif
 466
 467 #ifndef LONG_DOUBLE_TYPE_SIZE
 468 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 469 #endif
 470
 471 #ifndef DECIMAL32_TYPE_SIZE
 472 #define DECIMAL32_TYPE_SIZE 32
 473 #endif
 474
 475 #ifndef DECIMAL64_TYPE_SIZE
 476 #define DECIMAL64_TYPE_SIZE 64
 477 #endif
 478
 479 #ifndef DECIMAL128_TYPE_SIZE
 480 #define DECIMAL128_TYPE_SIZE 128
 481 #endif
 482
 483 #ifndef SHORT_FRACT_TYPE_SIZE
 484 #define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT
 485 #endif
 486
 487 #ifndef FRACT_TYPE_SIZE
 488 #define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2)
 489 #endif
 490
 491 #ifndef LONG_FRACT_TYPE_SIZE
 492 #define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4)
 493 #endif
 494
 495 #ifndef LONG_LONG_FRACT_TYPE_SIZE
 496 #define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8)
 497 #endif
 498
 499 #ifndef SHORT_ACCUM_TYPE_SIZE
 500 #define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2)
 501 #endif
 502
 503 #ifndef ACCUM_TYPE_SIZE
 504 #define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2)
 505 #endif
 506
 507 #ifndef LONG_ACCUM_TYPE_SIZE
 508 #define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2)
 509 #endif
 510
 511 #ifndef LONG_LONG_ACCUM_TYPE_SIZE
 512 #define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2)
 513 #endif
 514
 515 /* We let tm.h override the types used here, to handle trivial differences
 516    such as the choice of unsigned int or long unsigned int for size_t.
 517    When machines start needing nontrivial differences in the size type,
 518    it would be best to do something here to figure out automatically
 519    from other information what type to use.  */
 520
 521 #ifndef SIZE_TYPE
 522 #define SIZE_TYPE "long unsigned int"
 523 #endif
 524
 525 #ifndef PID_TYPE
 526 #define PID_TYPE "int"
 527 #endif
 528
 529 /* If GCC knows the exact uint_least16_t and uint_least32_t types from
 530    <stdint.h>, use them for char16_t and char32_t.  Otherwise, use
 531    these guesses; getting the wrong type of a given width will not
 532    affect C++ name mangling because in C++ these are distinct types
 533    not typedefs.  */
 534
 535 #ifdef UINT_LEAST16_TYPE
 536 #define CHAR16_TYPE UINT_LEAST16_TYPE
 537 #else
 538 #define CHAR16_TYPE "short unsigned int"
 539 #endif
 540
 541 #ifdef UINT_LEAST32_TYPE
 542 #define CHAR32_TYPE UINT_LEAST32_TYPE
 543 #else
 544 #define CHAR32_TYPE "unsigned int"
 545 #endif
 546
 547 #ifndef WCHAR_TYPE
 548 #define WCHAR_TYPE "int"
 549 #endif
 550
 551 /* WCHAR_TYPE gets overridden by -fshort-wchar.  */
 552 #define MODIFIED_WCHAR_TYPE \
 553         (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE)
 554
 555 #ifndef PTRDIFF_TYPE
 556 #define PTRDIFF_TYPE "long int"
 557 #endif
 558
 559 #ifndef WINT_TYPE
 560 #define WINT_TYPE "unsigned int"
 561 #endif
 562
 563 #ifndef INTMAX_TYPE
 564 #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)     \
 565                      ? "int"                                    \
 566                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 567                         ? "long int"                            \
 568                         : "long long int"))
 569 #endif
 570
 571 #ifndef UINTMAX_TYPE
 572 #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)    \
 573                      ? "unsigned int"                           \
 574                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 575                         ? "long unsigned int"                   \
 576                         : "long long unsigned int"))
 577 #endif
 578
 579
 580 /* There are no default definitions of these <stdint.h> types.  */
 581
 582 #ifndef SIG_ATOMIC_TYPE
 583 #define SIG_ATOMIC_TYPE ((const char *) NULL)
 584 #endif
 585
 586 #ifndef INT8_TYPE
 587 #define INT8_TYPE ((const char *) NULL)
 588 #endif
 589
 590 #ifndef INT16_TYPE
 591 #define INT16_TYPE ((const char *) NULL)
 592 #endif
 593
 594 #ifndef INT32_TYPE
 595 #define INT32_TYPE ((const char *) NULL)
 596 #endif
 597
 598 #ifndef INT64_TYPE
 599 #define INT64_TYPE ((const char *) NULL)
 600 #endif
 601
 602 #ifndef UINT8_TYPE
 603 #define UINT8_TYPE ((const char *) NULL)
 604 #endif
 605
 606 #ifndef UINT16_TYPE
 607 #define UINT16_TYPE ((const char *) NULL)
 608 #endif
 609
 610 #ifndef UINT32_TYPE
 611 #define UINT32_TYPE ((const char *) NULL)
 612 #endif
 613
 614 #ifndef UINT64_TYPE
 615 #define UINT64_TYPE ((const char *) NULL)
 616 #endif
 617
 618 #ifndef INT_LEAST8_TYPE
 619 #define INT_LEAST8_TYPE ((const char *) NULL)
 620 #endif
 621
 622 #ifndef INT_LEAST16_TYPE
 623 #define INT_LEAST16_TYPE ((const char *) NULL)
 624 #endif
 625
 626 #ifndef INT_LEAST32_TYPE
 627 #define INT_LEAST32_TYPE ((const char *) NULL)
 628 #endif
 629
 630 #ifndef INT_LEAST64_TYPE
 631 #define INT_LEAST64_TYPE ((const char *) NULL)
 632 #endif
 633
 634 #ifndef UINT_LEAST8_TYPE
 635 #define UINT_LEAST8_TYPE ((const char *) NULL)
 636 #endif
 637
 638 #ifndef UINT_LEAST16_TYPE
 639 #define UINT_LEAST16_TYPE ((const char *) NULL)
 640 #endif
 641
 642 #ifndef UINT_LEAST32_TYPE
 643 #define UINT_LEAST32_TYPE ((const char *) NULL)
 644 #endif
 645
 646 #ifndef UINT_LEAST64_TYPE
 647 #define UINT_LEAST64_TYPE ((const char *) NULL)
 648 #endif
 649
 650 #ifndef INT_FAST8_TYPE
 651 #define INT_FAST8_TYPE ((const char *) NULL)
 652 #endif
 653
 654 #ifndef INT_FAST16_TYPE
 655 #define INT_FAST16_TYPE ((const char *) NULL)
 656 #endif
 657
 658 #ifndef INT_FAST32_TYPE
 659 #define INT_FAST32_TYPE ((const char *) NULL)
 660 #endif
 661
 662 #ifndef INT_FAST64_TYPE
 663 #define INT_FAST64_TYPE ((const char *) NULL)
 664 #endif
 665
 666 #ifndef UINT_FAST8_TYPE
 667 #define UINT_FAST8_TYPE ((const char *) NULL)
 668 #endif
 669
 670 #ifndef UINT_FAST16_TYPE
 671 #define UINT_FAST16_TYPE ((const char *) NULL)
 672 #endif
 673
 674 #ifndef UINT_FAST32_TYPE
 675 #define UINT_FAST32_TYPE ((const char *) NULL)
 676 #endif
 677
 678 #ifndef UINT_FAST64_TYPE
 679 #define UINT_FAST64_TYPE ((const char *) NULL)
 680 #endif
 681
 682 #ifndef INTPTR_TYPE
 683 #define INTPTR_TYPE ((const char *) NULL)
 684 #endif
 685
 686 #ifndef UINTPTR_TYPE
 687 #define UINTPTR_TYPE ((const char *) NULL)
 688 #endif
 689
 690 /* Width in bits of a pointer.  Mind the value of the macro `Pmode'.  */
 691 #ifndef POINTER_SIZE
 692 #define POINTER_SIZE BITS_PER_WORD
 693 #endif
 694
 695 #ifndef PIC_OFFSET_TABLE_REGNUM
 696 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
 697 #endif
 698
 699 #ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
 700 #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 0
 701 #endif
 702
 703 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
 704 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
 705 #endif
 706
 707 #ifndef TARGET_DECLSPEC
 708 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
 709 /* If the target supports the "dllimport" attribute, users are
 710    probably used to the "__declspec" syntax.  */
 711 #define TARGET_DECLSPEC 1
 712 #else
 713 #define TARGET_DECLSPEC 0
 714 #endif
 715 #endif
 716
 717 /* By default, the preprocessor should be invoked the same way in C++
 718    as in C.  */
 719 #ifndef CPLUSPLUS_CPP_SPEC
 720 #ifdef CPP_SPEC
 721 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
 722 #endif
 723 #endif
 724
 725 #ifndef ACCUMULATE_OUTGOING_ARGS
 726 #define ACCUMULATE_OUTGOING_ARGS 0
 727 #endif
 728
 729 /* Supply a default definition for PUSH_ARGS.  */
 730 #ifndef PUSH_ARGS
 731 #ifdef PUSH_ROUNDING
 732 #define PUSH_ARGS       !ACCUMULATE_OUTGOING_ARGS
 733 #else
 734 #define PUSH_ARGS       0
 735 #endif
 736 #endif
 737
 738 /* Decide whether a function's arguments should be processed
 739    from first to last or from last to first.
 740
 741    They should if the stack and args grow in opposite directions, but
 742    only if we have push insns.  */
 743
 744 #ifdef PUSH_ROUNDING
 745
 746 #ifndef PUSH_ARGS_REVERSED
 747 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
 748 #define PUSH_ARGS_REVERSED  PUSH_ARGS
 749 #endif
 750 #endif
 751
 752 #endif
 753
 754 #ifndef PUSH_ARGS_REVERSED
 755 #define PUSH_ARGS_REVERSED 0
 756 #endif
 757
 758 /* Default value for the alignment (in bits) a C conformant malloc has to
 759    provide. This default is intended to be safe and always correct.  */
 760 #ifndef MALLOC_ABI_ALIGNMENT
 761 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
 762 #endif
 763
 764 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
 765    STACK_BOUNDARY is required.  */
 766 #ifndef PREFERRED_STACK_BOUNDARY
 767 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
 768 #endif
 769
 770 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not
 771    defined.  */
 772 #ifndef INCOMING_STACK_BOUNDARY
 773 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY
 774 #endif
 775
 776 #ifndef TARGET_DEFAULT_PACK_STRUCT
 777 #define TARGET_DEFAULT_PACK_STRUCT 0
 778 #endif
 779
 780 /* By default, the vtable entries are void pointers, the so the alignment
 781    is the same as pointer alignment.  The value of this macro specifies
 782    the alignment of the vtable entry in bits.  It should be defined only
 783    when special alignment is necessary.  */
 784 #ifndef TARGET_VTABLE_ENTRY_ALIGN
 785 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
 786 #endif
 787
 788 /* There are a few non-descriptor entries in the vtable at offsets below
 789    zero.  If these entries must be padded (say, to preserve the alignment
 790    specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
 791    words in each data entry.  */
 792 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
 793 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
 794 #endif
 795
 796 /* Decide whether it is safe to use a local alias for a virtual function
 797    when constructing thunks.  */
 798 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
 799 #ifdef ASM_OUTPUT_DEF
 800 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
 801 #else
 802 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
 803 #endif
 804 #endif
 805
 806 /* Select a format to encode pointers in exception handling data.  We
 807    prefer those that result in fewer dynamic relocations.  Assume no
 808    special support here and encode direct references.  */
 809 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
 810 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  DW_EH_PE_absptr
 811 #endif
 812
 813 /* By default, the C++ compiler will use the lowest bit of the pointer
 814    to function to indicate a pointer-to-member-function points to a
 815    virtual member function.  However, if FUNCTION_BOUNDARY indicates
 816    function addresses aren't always even, the lowest bit of the delta
 817    field will be used.  */
 818 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
 819 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
 820   (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
 821    ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
 822 #endif
 823
 824 #ifndef DEFAULT_GDB_EXTENSIONS
 825 #define DEFAULT_GDB_EXTENSIONS 1
 826 #endif
 827
 828 /* If more than one debugging type is supported, you must define
 829    PREFERRED_DEBUGGING_TYPE to choose the default.  */
 830
 831 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
 832          + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
 833          + defined (VMS_DEBUGGING_INFO))
 834 #ifndef PREFERRED_DEBUGGING_TYPE
 835 #error You must define PREFERRED_DEBUGGING_TYPE
 836 #endif /* no PREFERRED_DEBUGGING_TYPE */
 837
 838 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
 839    here so other code needn't care.  */
 840 #elif defined DBX_DEBUGGING_INFO
 841 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 842
 843 #elif defined SDB_DEBUGGING_INFO
 844 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
 845
 846 #elif defined DWARF2_DEBUGGING_INFO
 847 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 848
 849 #elif defined VMS_DEBUGGING_INFO
 850 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
 851
 852 #elif defined XCOFF_DEBUGGING_INFO
 853 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
 854
 855 #else
 856 /* No debugging format is supported by this target.  */
 857 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
 858 #endif
 859
 860 #ifndef LARGEST_EXPONENT_IS_NORMAL
 861 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
 862 #endif
 863
 864 #ifndef ROUND_TOWARDS_ZERO
 865 #define ROUND_TOWARDS_ZERO 0
 866 #endif
 867
 868 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
 869 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
 870 #endif
 871
 872 /* True if the targets integer-comparison functions return { 0, 1, 2
 873    } to indicate { <, ==, > }.  False if { -1, 0, 1 } is used
 874    instead.  The libgcc routines are biased.  */
 875 #ifndef TARGET_LIB_INT_CMP_BIASED
 876 #define TARGET_LIB_INT_CMP_BIASED (true)
 877 #endif
 878
 879 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
 880    then the word-endianness is the same as for integers.  */
 881 #ifndef FLOAT_WORDS_BIG_ENDIAN
 882 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 883 #endif
 884
 885 #ifdef TARGET_FLT_EVAL_METHOD
 886 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 1
 887 #else
 888 #define TARGET_FLT_EVAL_METHOD 0
 889 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 0
 890 #endif
 891
 892 #ifndef TARGET_DEC_EVAL_METHOD
 893 #define TARGET_DEC_EVAL_METHOD 2
 894 #endif
 895
 896 #ifndef HAS_LONG_COND_BRANCH
 897 #define HAS_LONG_COND_BRANCH 0
 898 #endif
 899
 900 #ifndef HAS_LONG_UNCOND_BRANCH
 901 #define HAS_LONG_UNCOND_BRANCH 0
 902 #endif
 903
 904 /* Determine whether __cxa_atexit, rather than atexit, is used to
 905    register C++ destructors for local statics and global objects.  */
 906 #ifndef DEFAULT_USE_CXA_ATEXIT
 907 #define DEFAULT_USE_CXA_ATEXIT 0
 908 #endif
 909
 910 /* If none of these macros are defined, the port must use the new
 911    technique of defining constraints in the machine description.
 912    tm_p.h will define those macros that machine-independent code
 913    still uses.  */
 914 #if  !defined CONSTRAINT_LEN                    \
 915   && !defined REG_CLASS_FROM_LETTER             \
 916   && !defined REG_CLASS_FROM_CONSTRAINT         \
 917   && !defined CONST_OK_FOR_LETTER_P             \
 918   && !defined CONST_OK_FOR_CONSTRAINT_P         \
 919   && !defined CONST_DOUBLE_OK_FOR_LETTER_P      \
 920   && !defined CONST_DOUBLE_OK_FOR_CONSTRAINT_P  \
 921   && !defined EXTRA_CONSTRAINT                  \
 922   && !defined EXTRA_CONSTRAINT_STR              \
 923   && !defined EXTRA_MEMORY_CONSTRAINT           \
 924   && !defined EXTRA_ADDRESS_CONSTRAINT
 925
 926 #define USE_MD_CONSTRAINTS
 927
 928 #if GCC_VERSION >= 3000 && defined IN_GCC
 929 /* These old constraint macros shouldn't appear anywhere in a
 930    configuration using MD constraint definitions.  */
 931 #pragma GCC poison REG_CLASS_FROM_LETTER CONST_OK_FOR_LETTER_P \
 932                    CONST_DOUBLE_OK_FOR_LETTER_P EXTRA_CONSTRAINT
 933 #endif
 934
 935 #else /* old constraint mechanism in use */
 936
 937 /* Determine whether extra constraint letter should be handled
 938    via address reload (like 'o').  */
 939 #ifndef EXTRA_MEMORY_CONSTRAINT
 940 #define EXTRA_MEMORY_CONSTRAINT(C,STR) 0
 941 #endif
 942
 943 /* Determine whether extra constraint letter should be handled
 944    as an address (like 'p').  */
 945 #ifndef EXTRA_ADDRESS_CONSTRAINT
 946 #define EXTRA_ADDRESS_CONSTRAINT(C,STR) 0
 947 #endif
 948
 949 /* When a port defines CONSTRAINT_LEN, it should use DEFAULT_CONSTRAINT_LEN
 950    for all the characters that it does not want to change, so things like the
 951   'length' of a digit in a matching constraint is an implementation detail,
 952    and not part of the interface.  */
 953 #define DEFAULT_CONSTRAINT_LEN(C,STR) 1
 954
 955 #ifndef CONSTRAINT_LEN
 956 #define CONSTRAINT_LEN(C,STR) DEFAULT_CONSTRAINT_LEN (C, STR)
 957 #endif
 958
 959 #if defined (CONST_OK_FOR_LETTER_P) && ! defined (CONST_OK_FOR_CONSTRAINT_P)
 960 #define CONST_OK_FOR_CONSTRAINT_P(VAL,C,STR) CONST_OK_FOR_LETTER_P (VAL, C)
 961 #endif
 962
 963 #if defined (CONST_DOUBLE_OK_FOR_LETTER_P) && ! defined (CONST_DOUBLE_OK_FOR_CONSTRAINT_P)
 964 #define CONST_DOUBLE_OK_FOR_CONSTRAINT_P(OP,C,STR) \
 965   CONST_DOUBLE_OK_FOR_LETTER_P (OP, C)
 966 #endif
 967
 968 #ifndef REG_CLASS_FROM_CONSTRAINT
 969 #define REG_CLASS_FROM_CONSTRAINT(C,STR) REG_CLASS_FROM_LETTER (C)
 970 #endif
 971
 972 #if defined (EXTRA_CONSTRAINT) && ! defined (EXTRA_CONSTRAINT_STR)
 973 #define EXTRA_CONSTRAINT_STR(OP, C,STR) EXTRA_CONSTRAINT (OP, C)
 974 #endif
 975
 976 #endif /* old constraint mechanism in use */
 977
 978 /* Determine whether the entire c99 runtime
 979    is present in the runtime library.  */
 980 #ifndef TARGET_C99_FUNCTIONS
 981 #define TARGET_C99_FUNCTIONS 0
 982 #endif
 983
 984 /* Determine whether the target runtime library has
 985    a sincos implementation following the GNU extension.  */
 986 #ifndef TARGET_HAS_SINCOS
 987 #define TARGET_HAS_SINCOS 0
 988 #endif
 989
 990 /* Indicate that CLZ and CTZ are undefined at zero.  */
 991 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
 992 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
 993 #endif
 994 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
 995 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
 996 #endif
 997
 998 /* Provide a default value for STORE_FLAG_VALUE.  */
 999 #ifndef STORE_FLAG_VALUE
1000 #define STORE_FLAG_VALUE  1
1001 #endif
1002
1003 /* This macro is used to determine what the largest unit size that
1004    move_by_pieces can use is.  */
1005
1006 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
1007    move efficiently, as opposed to  MOVE_MAX which is the maximum
1008    number of bytes we can move with a single instruction.  */
1009
1010 #ifndef MOVE_MAX_PIECES
1011 #define MOVE_MAX_PIECES   MOVE_MAX
1012 #endif
1013
1014 #ifndef MAX_MOVE_MAX
1015 #define MAX_MOVE_MAX MOVE_MAX
1016 #endif
1017
1018 #ifndef MIN_UNITS_PER_WORD
1019 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
1020 #endif
1021
1022 #ifndef MAX_BITS_PER_WORD
1023 #define MAX_BITS_PER_WORD BITS_PER_WORD
1024 #endif
1025
1026 #ifndef STACK_POINTER_OFFSET
1027 #define STACK_POINTER_OFFSET    0
1028 #endif
1029
1030 #ifndef LOCAL_REGNO
1031 #define LOCAL_REGNO(REGNO)  0
1032 #endif
1033
1034 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1035    the stack pointer does not matter.  The value is tested only in
1036    functions that have frame pointers.  */
1037 #ifndef EXIT_IGNORE_STACK
1038 #define EXIT_IGNORE_STACK 0
1039 #endif
1040
1041 /* Assume that case vectors are not pc-relative.  */
1042 #ifndef CASE_VECTOR_PC_RELATIVE
1043 #define CASE_VECTOR_PC_RELATIVE 0
1044 #endif
1045
1046 /* Assume that trampolines need function alignment.  */
1047 #ifndef TRAMPOLINE_ALIGNMENT
1048 #define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY
1049 #endif
1050
1051 /* Register mappings for target machines without register windows.  */
1052 #ifndef INCOMING_REGNO
1053 #define INCOMING_REGNO(N) (N)
1054 #endif
1055
1056 #ifndef OUTGOING_REGNO
1057 #define OUTGOING_REGNO(N) (N)
1058 #endif
1059
1060 #ifndef SHIFT_COUNT_TRUNCATED
1061 #define SHIFT_COUNT_TRUNCATED 0
1062 #endif
1063
1064 #ifndef LEGITIMATE_PIC_OPERAND_P
1065 #define LEGITIMATE_PIC_OPERAND_P(X) 1
1066 #endif
1067
1068 #ifndef TARGET_MEM_CONSTRAINT
1069 #define TARGET_MEM_CONSTRAINT 'm'
1070 #endif
1071
1072 #ifndef REVERSIBLE_CC_MODE
1073 #define REVERSIBLE_CC_MODE(MODE) 0
1074 #endif
1075
1076 /* Biggest alignment supported by the object file format of this machine.  */
1077 #ifndef MAX_OFILE_ALIGNMENT
1078 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
1079 #endif
1080
1081 #ifndef FRAME_GROWS_DOWNWARD
1082 #define FRAME_GROWS_DOWNWARD 0
1083 #endif
1084
1085 /* On most machines, the CFA coincides with the first incoming parm.  */
1086 #ifndef ARG_POINTER_CFA_OFFSET
1087 #define ARG_POINTER_CFA_OFFSET(FNDECL) \
1088   (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
1089 #endif
1090
1091 /* On most machines, we use the CFA as DW_AT_frame_base.  */
1092 #ifndef CFA_FRAME_BASE_OFFSET
1093 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0
1094 #endif
1095
1096 /* The offset from the incoming value of %sp to the top of the stack frame
1097    for the current function.  */
1098 #ifndef INCOMING_FRAME_SP_OFFSET
1099 #define INCOMING_FRAME_SP_OFFSET 0
1100 #endif
1101
1102 #ifndef HARD_REGNO_NREGS_HAS_PADDING
1103 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
1104 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
1105 #endif
1106
1107 #ifndef OUTGOING_REG_PARM_STACK_SPACE
1108 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
1109 #endif
1110
1111 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
1112    the backend.  MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
1113    effort stack alignment supported by the backend.  If the backend
1114    supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
1115    MAX_STACK_ALIGNMENT are the same.  Otherwise, the incoming stack
1116    boundary will limit the maximum guaranteed stack alignment.  */
1117 #ifdef MAX_STACK_ALIGNMENT
1118 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
1119 #else
1120 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY
1121 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
1122 #endif
1123
1124 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
1125
1126 #ifndef LOCAL_ALIGNMENT
1127 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
1128 #endif
1129
1130 #ifndef STACK_SLOT_ALIGNMENT
1131 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
1132   ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
1133 #endif
1134
1135 #ifndef LOCAL_DECL_ALIGNMENT
1136 #define LOCAL_DECL_ALIGNMENT(DECL) \
1137   LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
1138 #endif
1139
1140 #ifndef MINIMUM_ALIGNMENT
1141 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN)
1142 #endif
1143
1144 /* Alignment value for attribute ((aligned)).  */
1145 #ifndef ATTRIBUTE_ALIGNED_VALUE
1146 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
1147 #endif
1148
1149 /* Many ports have no mode-dependent addresses (except possibly autoincrement
1150    and autodecrement addresses, which are handled by target-independent code
1151    in recog.c).  */
1152 #ifndef GO_IF_MODE_DEPENDENT_ADDRESS
1153 #define GO_IF_MODE_DEPENDENT_ADDRESS(X, WIN)
1154 #endif
1155
1156 /* For most ports anything that evaluates to a constant symbolic
1157    or integer value is acceptable as a constant address.  */
1158 #ifndef CONSTANT_ADDRESS_P
1159 #define CONSTANT_ADDRESS_P(X)   (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE)
1160 #endif
1161
1162 #ifndef MAX_FIXED_MODE_SIZE
1163 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
1164 #endif
1165
1166 /* Nonzero if structures and unions should be returned in memory.
1167
1168    This should only be defined if compatibility with another compiler or
1169    with an ABI is needed, because it results in slower code.  */
1170
1171 #ifndef DEFAULT_PCC_STRUCT_RETURN
1172 #define DEFAULT_PCC_STRUCT_RETURN 1
1173 #endif
1174
1175 #ifdef GCC_INSN_FLAGS_H
1176 /* Dependent default target macro definitions
1177
1178    This section of defaults.h defines target macros that depend on generated
1179    headers.  This is a bit awkward:  We want to put all default definitions
1180    for target macros in defaults.h, but some of the defaults depend on the
1181    HAVE_* flags defines of insn-flags.h.  But insn-flags.h is not always
1182    included by files that do include defaults.h.
1183
1184    Fortunately, the default macro definitions that depend on the HAVE_*
1185    macros are also the ones that will only be used inside GCC itself, i.e.
1186    not in the gen* programs or in target objects like libgcc.
1187
1188    Obviously, it would be best to keep this section of defaults.h as small
1189    as possible, by converting the macros defined below to target hooks or
1190    functions.
1191 */
1192
1193 /* The default branch cost is 1.  */
1194 #ifndef BRANCH_COST
1195 #define BRANCH_COST(speed_p, predictable_p) 1
1196 #endif
1197
1198 /* If a memory-to-memory move would take MOVE_RATIO or more simple
1199    move-instruction sequences, we will do a movmem or libcall instead.  */
1200
1201 #ifndef MOVE_RATIO
1202 #if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti)
1203 #define MOVE_RATIO(speed) 2
1204 #else
1205 /* If we are optimizing for space (-Os), cut down the default move ratio.  */
1206 #define MOVE_RATIO(speed) ((speed) ? 15 : 3)
1207 #endif
1208 #endif
1209
1210 /* If a clear memory operation would take CLEAR_RATIO or more simple
1211    move-instruction sequences, we will do a setmem or libcall instead.  */
1212
1213 #ifndef CLEAR_RATIO
1214 #if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
1215 #define CLEAR_RATIO(speed) 2
1216 #else
1217 /* If we are optimizing for space, cut down the default clear ratio.  */
1218 #define CLEAR_RATIO(speed) ((speed) ? 15 :3)
1219 #endif
1220 #endif
1221
1222 /* If a memory set (to value other than zero) operation would take
1223    SET_RATIO or more simple move-instruction sequences, we will do a movmem
1224    or libcall instead.  */
1225 #ifndef SET_RATIO
1226 #define SET_RATIO(speed) MOVE_RATIO(speed)
1227 #endif
1228
1229 /* Supply a default definition for FUNCTION_ARG_PADDING:
1230    usually pad upward, but pad short args downward on
1231    big-endian machines.  */
1232
1233 #define DEFAULT_FUNCTION_ARG_PADDING(MODE, TYPE)                        \
1234   (! BYTES_BIG_ENDIAN                                                   \
1235    ? upward                                                             \
1236    : (((MODE) == BLKmode                                                \
1237        ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST         \
1238           && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \
1239        : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY)                       \
1240       ? downward : upward))
1241
1242 #ifndef FUNCTION_ARG_PADDING
1243 #define FUNCTION_ARG_PADDING(MODE, TYPE)        \
1244   DEFAULT_FUNCTION_ARG_PADDING ((MODE), (TYPE))
1245 #endif
1246
1247 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
1248    Normally move_insn, so Pmode stack pointer.  */
1249
1250 #ifndef STACK_SAVEAREA_MODE
1251 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
1252 #endif
1253
1254 /* Supply a default definition of STACK_SIZE_MODE for
1255    allocate_dynamic_stack_space.  Normally PLUS/MINUS, so word_mode.  */
1256
1257 #ifndef STACK_SIZE_MODE
1258 #define STACK_SIZE_MODE word_mode
1259 #endif
1260
1261 /* Provide default values for the macros controlling stack checking.  */
1262
1263 /* The default is neither full builtin stack checking...  */
1264 #ifndef STACK_CHECK_BUILTIN
1265 #define STACK_CHECK_BUILTIN 0
1266 #endif
1267
1268 /* ...nor static builtin stack checking.  */
1269 #ifndef STACK_CHECK_STATIC_BUILTIN
1270 #define STACK_CHECK_STATIC_BUILTIN 0
1271 #endif
1272
1273 /* The default interval is one page (4096 bytes).  */
1274 #ifndef STACK_CHECK_PROBE_INTERVAL_EXP
1275 #define STACK_CHECK_PROBE_INTERVAL_EXP 12
1276 #endif
1277
1278 /* The default is not to move the stack pointer.  */
1279 #ifndef STACK_CHECK_MOVING_SP
1280 #define STACK_CHECK_MOVING_SP 0
1281 #endif
1282
1283 /* This is a kludge to try to capture the discrepancy between the old
1284    mechanism (generic stack checking) and the new mechanism (static
1285    builtin stack checking).  STACK_CHECK_PROTECT needs to be bumped
1286    for the latter because part of the protection area is effectively
1287    included in STACK_CHECK_MAX_FRAME_SIZE for the former.  */
1288 #ifdef STACK_CHECK_PROTECT
1289 #define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
1290 #else
1291 #define STACK_OLD_CHECK_PROTECT                                 \
1292  (targetm.except_unwind_info (&global_options) == UI_SJLJ       \
1293   ? 75 * UNITS_PER_WORD                                         \
1294   : 8 * 1024)
1295 #endif
1296
1297 /* Minimum amount of stack required to recover from an anticipated stack
1298    overflow detection.  The default value conveys an estimate of the amount
1299    of stack required to propagate an exception.  */
1300 #ifndef STACK_CHECK_PROTECT
1301 #define STACK_CHECK_PROTECT                                     \
1302  (targetm.except_unwind_info (&global_options) == UI_SJLJ       \
1303   ? 75 * UNITS_PER_WORD                                         \
1304   : 12 * 1024)
1305 #endif
1306
1307 /* Make the maximum frame size be the largest we can and still only need
1308    one probe per function.  */
1309 #ifndef STACK_CHECK_MAX_FRAME_SIZE
1310 #define STACK_CHECK_MAX_FRAME_SIZE \
1311   ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD)
1312 #endif
1313
1314 /* This is arbitrary, but should be large enough everywhere.  */
1315 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
1316 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
1317 #endif
1318
1319 /* Provide a reasonable default for the maximum size of an object to
1320    allocate in the fixed frame.  We may need to be able to make this
1321    controllable by the user at some point.  */
1322 #ifndef STACK_CHECK_MAX_VAR_SIZE
1323 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
1324 #endif
1325
1326 /* By default, the C++ compiler will use function addresses in the
1327    vtable entries.  Setting this nonzero tells the compiler to use
1328    function descriptors instead.  The value of this macro says how
1329    many words wide the descriptor is (normally 2).  It is assumed
1330    that the address of a function descriptor may be treated as a
1331    pointer to a function.  */
1332 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
1333 #define TARGET_VTABLE_USES_DESCRIPTORS 0
1334 #endif
1335
1336 #ifndef SWITCHABLE_TARGET
1337 #define SWITCHABLE_TARGET 0
1338 #endif
1339
1340 #endif /* GCC_INSN_FLAGS_H  */
1341
1342 #endif  /* ! GCC_DEFAULTS_H */