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 #ifndef GET_ENVIRONMENT
  32 #define GET_ENVIRONMENT(VALUE, NAME) do { (VALUE) = getenv (NAME); } while (0)
  33 #endif
  34
  35 /* Store in OUTPUT a string (made with alloca) containing an
  36    assembler-name for a local static variable or function named NAME.
  37    LABELNO is an integer which is different for each call.  */
  38
  39 #ifndef ASM_PN_FORMAT
  40 # ifndef NO_DOT_IN_LABEL
  41 #  define ASM_PN_FORMAT "%s.%lu"
  42 # else
  43 #  ifndef NO_DOLLAR_IN_LABEL
  44 #   define ASM_PN_FORMAT "%s$%lu"
  45 #  else
  46 #   define ASM_PN_FORMAT "__%s_%lu"
  47 #  endif
  48 # endif
  49 #endif /* ! ASM_PN_FORMAT */
  50
  51 #ifndef ASM_FORMAT_PRIVATE_NAME
  52 # define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
  53   do { const char *const name_ = (NAME); \
  54        char *const output_ = (OUTPUT) = \
  55          (char *) alloca (strlen (name_) + 32); \
  56        sprintf (output_, ASM_PN_FORMAT, name_, (unsigned long)(LABELNO)); \
  57   } while (0)
  58 #endif
  59
  60 /* Choose a reasonable default for ASM_OUTPUT_ASCII.  */
  61
  62 #ifndef ASM_OUTPUT_ASCII
  63 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
  64   do {                                                                        \
  65     FILE *_hide_asm_out_file = (MYFILE);                                      \
  66     const unsigned char *_hide_p = (const unsigned char *) (MYSTRING);        \
  67     int _hide_thissize = (MYLENGTH);                                          \
  68     {                                                                         \
  69       FILE *asm_out_file = _hide_asm_out_file;                                \
  70       const unsigned char *p = _hide_p;                                       \
  71       int thissize = _hide_thissize;                                          \
  72       int i;                                                                  \
  73       fprintf (asm_out_file, "\t.ascii \"");                                  \
  74                                                                               \
  75       for (i = 0; i < thissize; i++)                                          \
  76         {                                                                     \
  77           int c = p[i];                                                       \
  78           if (c == '\"' || c == '\\')                                         \
  79             putc ('\\', asm_out_file);                                        \
  80           if (ISPRINT(c))                                                     \
  81             putc (c, asm_out_file);                                           \
  82           else                                                                \
  83             {                                                                 \
  84               fprintf (asm_out_file, "\\%o", c);                              \
  85               /* After an octal-escape, if a digit follows,                   \
  86                  terminate one string constant and start another.             \
  87                  The VAX assembler fails to stop reading the escape           \
  88                  after three digits, so this is the only way we               \
  89                  can get it to parse the data properly.  */                   \
  90               if (i < thissize - 1 && ISDIGIT(p[i + 1]))                      \
  91                 fprintf (asm_out_file, "\"\n\t.ascii \"");                    \
  92           }                                                                   \
  93         }                                                                     \
  94       fprintf (asm_out_file, "\"\n");                                         \
  95     }                                                                         \
  96   }                                                                           \
  97   while (0)
  98 #endif
  99
 100 /* This is how we tell the assembler to equate two values.  */
 101 #ifdef SET_ASM_OP
 102 #ifndef ASM_OUTPUT_DEF
 103 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
 104  do {   fprintf ((FILE), "%s", SET_ASM_OP);                             \
 105         assemble_name (FILE, LABEL1);                                   \
 106         fprintf (FILE, ",");                                            \
 107         assemble_name (FILE, LABEL2);                                   \
 108         fprintf (FILE, "\n");                                           \
 109   } while (0)
 110 #endif
 111 #endif
 112
 113 #ifndef IFUNC_ASM_TYPE
 114 #define IFUNC_ASM_TYPE "gnu_indirect_function"
 115 #endif
 116
 117 #ifndef TLS_COMMON_ASM_OP
 118 #define TLS_COMMON_ASM_OP ".tls_common"
 119 #endif
 120
 121 #if defined (HAVE_AS_TLS) && !defined (ASM_OUTPUT_TLS_COMMON)
 122 #define ASM_OUTPUT_TLS_COMMON(FILE, DECL, NAME, SIZE)                   \
 123   do                                                                    \
 124     {                                                                   \
 125       fprintf ((FILE), "\t%s\t", TLS_COMMON_ASM_OP);                    \
 126       assemble_name ((FILE), (NAME));                                   \
 127       fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n",          \
 128                (SIZE), DECL_ALIGN (DECL) / BITS_PER_UNIT);              \
 129     }                                                                   \
 130   while (0)
 131 #endif
 132
 133 /* Decide whether to defer emitting the assembler output for an equate
 134    of two values.  The default is to not defer output.  */
 135 #ifndef TARGET_DEFERRED_OUTPUT_DEFS
 136 #define TARGET_DEFERRED_OUTPUT_DEFS(DECL,TARGET) false
 137 #endif
 138
 139 /* This is how to output the definition of a user-level label named
 140    NAME, such as the label on variable NAME.  */
 141
 142 #ifndef ASM_OUTPUT_LABEL
 143 #define ASM_OUTPUT_LABEL(FILE,NAME) \
 144   do { assemble_name ((FILE), (NAME)); fputs (":\n", (FILE)); } while (0)
 145 #endif
 146
 147 /* This is how to output the definition of a user-level label named
 148    NAME, such as the label on a function.  */
 149
 150 #ifndef ASM_OUTPUT_FUNCTION_LABEL
 151 #define ASM_OUTPUT_FUNCTION_LABEL(FILE, NAME, DECL) \
 152   ASM_OUTPUT_LABEL ((FILE), (NAME))
 153 #endif
 154
 155 /* Output the definition of a compiler-generated label named NAME.  */
 156 #ifndef ASM_OUTPUT_INTERNAL_LABEL
 157 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,NAME)    \
 158   do {                                          \
 159     assemble_name_raw ((FILE), (NAME));         \
 160     fputs (":\n", (FILE));                      \
 161   } while (0)
 162 #endif
 163
 164 /* This is how to output a reference to a user-level label named NAME.  */
 165
 166 #ifndef ASM_OUTPUT_LABELREF
 167 #define ASM_OUTPUT_LABELREF(FILE,NAME)  asm_fprintf ((FILE), "%U%s", (NAME))
 168 #endif
 169
 170 /* Allow target to print debug info labels specially.  This is useful for
 171    VLIW targets, since debug info labels should go into the middle of
 172    instruction bundles instead of breaking them.  */
 173
 174 #ifndef ASM_OUTPUT_DEBUG_LABEL
 175 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
 176   (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM)
 177 #endif
 178
 179 /* This is how we tell the assembler that a symbol is weak.  */
 180 #ifndef ASM_OUTPUT_WEAK_ALIAS
 181 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
 182 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE)      \
 183   do                                                    \
 184     {                                                   \
 185       ASM_WEAKEN_LABEL (STREAM, NAME);                  \
 186       if (VALUE)                                        \
 187         ASM_OUTPUT_DEF (STREAM, NAME, VALUE);           \
 188     }                                                   \
 189   while (0)
 190 #endif
 191 #endif
 192
 193 /* This is how we tell the assembler that a symbol is a weak alias to
 194    another symbol that doesn't require the other symbol to be defined.
 195    Uses of the former will turn into weak uses of the latter, i.e.,
 196    uses that, in case the latter is undefined, will not cause errors,
 197    and will add it to the symbol table as weak undefined.  However, if
 198    the latter is referenced directly, a strong reference prevails.  */
 199 #ifndef ASM_OUTPUT_WEAKREF
 200 #if defined HAVE_GAS_WEAKREF
 201 #define ASM_OUTPUT_WEAKREF(FILE, DECL, NAME, VALUE)                     \
 202   do                                                                    \
 203     {                                                                   \
 204       fprintf ((FILE), "\t.weakref\t");                                 \
 205       assemble_name ((FILE), (NAME));                                   \
 206       fprintf ((FILE), ",");                                            \
 207       assemble_name ((FILE), (VALUE));                                  \
 208       fprintf ((FILE), "\n");                                           \
 209     }                                                                   \
 210   while (0)
 211 #endif
 212 #endif
 213
 214 /* How to emit a .type directive.  */
 215 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE
 216 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT
 217 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE)   \
 218   do                                                    \
 219     {                                                   \
 220       fputs (TYPE_ASM_OP, STREAM);                      \
 221       assemble_name (STREAM, NAME);                     \
 222       fputs (", ", STREAM);                             \
 223       fprintf (STREAM, TYPE_OPERAND_FMT, TYPE);         \
 224       putc ('\n', STREAM);                              \
 225     }                                                   \
 226   while (0)
 227 #endif
 228 #endif
 229
 230 /* How to emit a .size directive.  */
 231 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE
 232 #ifdef SIZE_ASM_OP
 233 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE)   \
 234   do                                                    \
 235     {                                                   \
 236       HOST_WIDE_INT size_ = (SIZE);                     \
 237       fputs (SIZE_ASM_OP, STREAM);                      \
 238       assemble_name (STREAM, NAME);                     \
 239       fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \
 240     }                                                   \
 241   while (0)
 242
 243 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME)          \
 244   do                                                    \
 245     {                                                   \
 246       fputs (SIZE_ASM_OP, STREAM);                      \
 247       assemble_name (STREAM, NAME);                     \
 248       fputs (", .-", STREAM);                           \
 249       assemble_name (STREAM, NAME);                     \
 250       putc ('\n', STREAM);                              \
 251     }                                                   \
 252   while (0)
 253
 254 #endif
 255 #endif
 256
 257 /* This determines whether or not we support weak symbols.  SUPPORTS_WEAK
 258    must be a preprocessor constant.  */
 259 #ifndef SUPPORTS_WEAK
 260 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
 261 #define SUPPORTS_WEAK 1
 262 #else
 263 #define SUPPORTS_WEAK 0
 264 #endif
 265 #endif
 266
 267 /* This determines whether or not we support weak symbols during target
 268    code generation.  TARGET_SUPPORTS_WEAK can be any valid C expression.  */
 269 #ifndef TARGET_SUPPORTS_WEAK
 270 #define TARGET_SUPPORTS_WEAK (SUPPORTS_WEAK)
 271 #endif
 272
 273 /* This determines whether or not we support the discriminator
 274    attribute in the .loc directive.  */
 275 #ifndef SUPPORTS_DISCRIMINATOR
 276 #ifdef HAVE_GAS_DISCRIMINATOR
 277 #define SUPPORTS_DISCRIMINATOR 1
 278 #else
 279 #define SUPPORTS_DISCRIMINATOR 0
 280 #endif
 281 #endif
 282
 283 /* This determines whether or not we support link-once semantics.  */
 284 #ifndef SUPPORTS_ONE_ONLY
 285 #ifdef MAKE_DECL_ONE_ONLY
 286 #define SUPPORTS_ONE_ONLY 1
 287 #else
 288 #define SUPPORTS_ONE_ONLY 0
 289 #endif
 290 #endif
 291
 292 /* This determines whether weak symbols must be left out of a static
 293    archive's table of contents.  Defining this macro to be nonzero has
 294    the consequence that certain symbols will not be made weak that
 295    otherwise would be.  The C++ ABI requires this macro to be zero;
 296    see the documentation.  */
 297 #ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 298 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
 299 #endif
 300
 301 /* This determines whether or not we need linkonce unwind information.  */
 302 #ifndef TARGET_USES_WEAK_UNWIND_INFO
 303 #define TARGET_USES_WEAK_UNWIND_INFO 0
 304 #endif
 305
 306 /* By default, there is no prefix on user-defined symbols.  */
 307 #ifndef USER_LABEL_PREFIX
 308 #define USER_LABEL_PREFIX ""
 309 #endif
 310
 311 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
 312    provide a weak attribute.  Else define it to nothing.
 313
 314    This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
 315    not available at that time.
 316
 317    Note, this is only for use by target files which we know are to be
 318    compiled by GCC.  */
 319 #ifndef TARGET_ATTRIBUTE_WEAK
 320 # if SUPPORTS_WEAK
 321 #  define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
 322 # else
 323 #  define TARGET_ATTRIBUTE_WEAK
 324 # endif
 325 #endif
 326
 327 /* Determines whether we may use common symbols to represent one-only
 328    semantics (a.k.a. "vague linkage").  */
 329 #ifndef USE_COMMON_FOR_ONE_ONLY
 330 # define USE_COMMON_FOR_ONE_ONLY 1
 331 #endif
 332
 333 /* By default we can assume that all global symbols are in one namespace,
 334    across all shared libraries.  */
 335 #ifndef MULTIPLE_SYMBOL_SPACES
 336 # define MULTIPLE_SYMBOL_SPACES 0
 337 #endif
 338
 339 /* If the target supports init_priority C++ attribute, give
 340    SUPPORTS_INIT_PRIORITY a nonzero value.  */
 341 #ifndef SUPPORTS_INIT_PRIORITY
 342 #define SUPPORTS_INIT_PRIORITY 1
 343 #endif /* SUPPORTS_INIT_PRIORITY */
 344
 345 /* If duplicate library search directories can be removed from a
 346    linker command without changing the linker's semantics, give this
 347    symbol a nonzero.  */
 348 #ifndef LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
 349 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 0
 350 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
 351
 352 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
 353    the rest of the DWARF 2 frame unwind support is also provided.  */
 354 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
 355 #define DWARF2_UNWIND_INFO 1
 356 #endif
 357
 358 /* If we have named sections, and we're using crtstuff to run ctors,
 359    use them for registering eh frame information.  */
 360 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
 361     && !defined(EH_FRAME_IN_DATA_SECTION)
 362 #ifndef EH_FRAME_SECTION_NAME
 363 #define EH_FRAME_SECTION_NAME ".eh_frame"
 364 #endif
 365 #endif
 366
 367 /* On many systems, different EH table encodings are used under
 368    difference circumstances.  Some will require runtime relocations;
 369    some will not.  For those that do not require runtime relocations,
 370    we would like to make the table read-only.  However, since the
 371    read-only tables may need to be combined with read-write tables
 372    that do require runtime relocation, it is not safe to make the
 373    tables read-only unless the linker will merge read-only and
 374    read-write sections into a single read-write section.  If your
 375    linker does not have this ability, but your system is such that no
 376    encoding used with non-PIC code will ever require a runtime
 377    relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in
 378    your target configuration file.  */
 379 #ifndef EH_TABLES_CAN_BE_READ_ONLY
 380 #ifdef HAVE_LD_RO_RW_SECTION_MIXING
 381 #define EH_TABLES_CAN_BE_READ_ONLY 1
 382 #else
 383 #define EH_TABLES_CAN_BE_READ_ONLY 0
 384 #endif
 385 #endif
 386
 387 /* If we have named section and we support weak symbols, then use the
 388    .jcr section for recording java classes which need to be registered
 389    at program start-up time.  */
 390 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
 391 #ifndef JCR_SECTION_NAME
 392 #define JCR_SECTION_NAME ".jcr"
 393 #endif
 394 #endif
 395
 396 /* This decision to use a .jcr section can be overridden by defining
 397    USE_JCR_SECTION to 0 in target file.  This is necessary if target
 398    can define JCR_SECTION_NAME but does not have crtstuff or
 399    linker support for .jcr section.  */
 400 #ifndef TARGET_USE_JCR_SECTION
 401 #ifdef JCR_SECTION_NAME
 402 #define TARGET_USE_JCR_SECTION 1
 403 #else
 404 #define TARGET_USE_JCR_SECTION 0
 405 #endif
 406 #endif
 407
 408 /* Number of hardware registers that go into the DWARF-2 unwind info.
 409    If not defined, equals FIRST_PSEUDO_REGISTER  */
 410
 411 #ifndef DWARF_FRAME_REGISTERS
 412 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
 413 #endif
 414
 415 /* How to renumber registers for dbx and gdb.  If not defined, assume
 416    no renumbering is necessary.  */
 417
 418 #ifndef DBX_REGISTER_NUMBER
 419 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 420 #endif
 421
 422 /* Default sizes for base C types.  If the sizes are different for
 423    your target, you should override these values by defining the
 424    appropriate symbols in your tm.h file.  */
 425
 426 #ifndef BITS_PER_UNIT
 427 #define BITS_PER_UNIT 8
 428 #endif
 429
 430 #ifndef BITS_PER_WORD
 431 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
 432 #endif
 433
 434 #ifndef CHAR_TYPE_SIZE
 435 #define CHAR_TYPE_SIZE BITS_PER_UNIT
 436 #endif
 437
 438 #ifndef BOOL_TYPE_SIZE
 439 /* `bool' has size and alignment `1', on almost all platforms.  */
 440 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
 441 #endif
 442
 443 #ifndef SHORT_TYPE_SIZE
 444 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
 445 #endif
 446
 447 #ifndef INT_TYPE_SIZE
 448 #define INT_TYPE_SIZE BITS_PER_WORD
 449 #endif
 450
 451 #ifndef LONG_TYPE_SIZE
 452 #define LONG_TYPE_SIZE BITS_PER_WORD
 453 #endif
 454
 455 #ifndef LONG_LONG_TYPE_SIZE
 456 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
 457 #endif
 458
 459 #ifndef WCHAR_TYPE_SIZE
 460 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
 461 #endif
 462
 463 #ifndef FLOAT_TYPE_SIZE
 464 #define FLOAT_TYPE_SIZE BITS_PER_WORD
 465 #endif
 466
 467 #ifndef DOUBLE_TYPE_SIZE
 468 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 469 #endif
 470
 471 #ifndef LONG_DOUBLE_TYPE_SIZE
 472 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 473 #endif
 474
 475 #ifndef DECIMAL32_TYPE_SIZE
 476 #define DECIMAL32_TYPE_SIZE 32
 477 #endif
 478
 479 #ifndef DECIMAL64_TYPE_SIZE
 480 #define DECIMAL64_TYPE_SIZE 64
 481 #endif
 482
 483 #ifndef DECIMAL128_TYPE_SIZE
 484 #define DECIMAL128_TYPE_SIZE 128
 485 #endif
 486
 487 #ifndef SHORT_FRACT_TYPE_SIZE
 488 #define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT
 489 #endif
 490
 491 #ifndef FRACT_TYPE_SIZE
 492 #define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2)
 493 #endif
 494
 495 #ifndef LONG_FRACT_TYPE_SIZE
 496 #define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4)
 497 #endif
 498
 499 #ifndef LONG_LONG_FRACT_TYPE_SIZE
 500 #define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8)
 501 #endif
 502
 503 #ifndef SHORT_ACCUM_TYPE_SIZE
 504 #define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2)
 505 #endif
 506
 507 #ifndef ACCUM_TYPE_SIZE
 508 #define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2)
 509 #endif
 510
 511 #ifndef LONG_ACCUM_TYPE_SIZE
 512 #define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2)
 513 #endif
 514
 515 #ifndef LONG_LONG_ACCUM_TYPE_SIZE
 516 #define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2)
 517 #endif
 518
 519 /* We let tm.h override the types used here, to handle trivial differences
 520    such as the choice of unsigned int or long unsigned int for size_t.
 521    When machines start needing nontrivial differences in the size type,
 522    it would be best to do something here to figure out automatically
 523    from other information what type to use.  */
 524
 525 #ifndef SIZE_TYPE
 526 #define SIZE_TYPE "long unsigned int"
 527 #endif
 528
 529 #ifndef PID_TYPE
 530 #define PID_TYPE "int"
 531 #endif
 532
 533 /* If GCC knows the exact uint_least16_t and uint_least32_t types from
 534    <stdint.h>, use them for char16_t and char32_t.  Otherwise, use
 535    these guesses; getting the wrong type of a given width will not
 536    affect C++ name mangling because in C++ these are distinct types
 537    not typedefs.  */
 538
 539 #ifdef UINT_LEAST16_TYPE
 540 #define CHAR16_TYPE UINT_LEAST16_TYPE
 541 #else
 542 #define CHAR16_TYPE "short unsigned int"
 543 #endif
 544
 545 #ifdef UINT_LEAST32_TYPE
 546 #define CHAR32_TYPE UINT_LEAST32_TYPE
 547 #else
 548 #define CHAR32_TYPE "unsigned int"
 549 #endif
 550
 551 #ifndef WCHAR_TYPE
 552 #define WCHAR_TYPE "int"
 553 #endif
 554
 555 /* WCHAR_TYPE gets overridden by -fshort-wchar.  */
 556 #define MODIFIED_WCHAR_TYPE \
 557         (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE)
 558
 559 #ifndef PTRDIFF_TYPE
 560 #define PTRDIFF_TYPE "long int"
 561 #endif
 562
 563 #ifndef WINT_TYPE
 564 #define WINT_TYPE "unsigned int"
 565 #endif
 566
 567 #ifndef INTMAX_TYPE
 568 #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)     \
 569                      ? "int"                                    \
 570                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 571                         ? "long int"                            \
 572                         : "long long int"))
 573 #endif
 574
 575 #ifndef UINTMAX_TYPE
 576 #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)    \
 577                      ? "unsigned int"                           \
 578                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 579                         ? "long unsigned int"                   \
 580                         : "long long unsigned int"))
 581 #endif
 582
 583
 584 /* There are no default definitions of these <stdint.h> types.  */
 585
 586 #ifndef SIG_ATOMIC_TYPE
 587 #define SIG_ATOMIC_TYPE ((const char *) NULL)
 588 #endif
 589
 590 #ifndef INT8_TYPE
 591 #define INT8_TYPE ((const char *) NULL)
 592 #endif
 593
 594 #ifndef INT16_TYPE
 595 #define INT16_TYPE ((const char *) NULL)
 596 #endif
 597
 598 #ifndef INT32_TYPE
 599 #define INT32_TYPE ((const char *) NULL)
 600 #endif
 601
 602 #ifndef INT64_TYPE
 603 #define INT64_TYPE ((const char *) NULL)
 604 #endif
 605
 606 #ifndef UINT8_TYPE
 607 #define UINT8_TYPE ((const char *) NULL)
 608 #endif
 609
 610 #ifndef UINT16_TYPE
 611 #define UINT16_TYPE ((const char *) NULL)
 612 #endif
 613
 614 #ifndef UINT32_TYPE
 615 #define UINT32_TYPE ((const char *) NULL)
 616 #endif
 617
 618 #ifndef UINT64_TYPE
 619 #define UINT64_TYPE ((const char *) NULL)
 620 #endif
 621
 622 #ifndef INT_LEAST8_TYPE
 623 #define INT_LEAST8_TYPE ((const char *) NULL)
 624 #endif
 625
 626 #ifndef INT_LEAST16_TYPE
 627 #define INT_LEAST16_TYPE ((const char *) NULL)
 628 #endif
 629
 630 #ifndef INT_LEAST32_TYPE
 631 #define INT_LEAST32_TYPE ((const char *) NULL)
 632 #endif
 633
 634 #ifndef INT_LEAST64_TYPE
 635 #define INT_LEAST64_TYPE ((const char *) NULL)
 636 #endif
 637
 638 #ifndef UINT_LEAST8_TYPE
 639 #define UINT_LEAST8_TYPE ((const char *) NULL)
 640 #endif
 641
 642 #ifndef UINT_LEAST16_TYPE
 643 #define UINT_LEAST16_TYPE ((const char *) NULL)
 644 #endif
 645
 646 #ifndef UINT_LEAST32_TYPE
 647 #define UINT_LEAST32_TYPE ((const char *) NULL)
 648 #endif
 649
 650 #ifndef UINT_LEAST64_TYPE
 651 #define UINT_LEAST64_TYPE ((const char *) NULL)
 652 #endif
 653
 654 #ifndef INT_FAST8_TYPE
 655 #define INT_FAST8_TYPE ((const char *) NULL)
 656 #endif
 657
 658 #ifndef INT_FAST16_TYPE
 659 #define INT_FAST16_TYPE ((const char *) NULL)
 660 #endif
 661
 662 #ifndef INT_FAST32_TYPE
 663 #define INT_FAST32_TYPE ((const char *) NULL)
 664 #endif
 665
 666 #ifndef INT_FAST64_TYPE
 667 #define INT_FAST64_TYPE ((const char *) NULL)
 668 #endif
 669
 670 #ifndef UINT_FAST8_TYPE
 671 #define UINT_FAST8_TYPE ((const char *) NULL)
 672 #endif
 673
 674 #ifndef UINT_FAST16_TYPE
 675 #define UINT_FAST16_TYPE ((const char *) NULL)
 676 #endif
 677
 678 #ifndef UINT_FAST32_TYPE
 679 #define UINT_FAST32_TYPE ((const char *) NULL)
 680 #endif
 681
 682 #ifndef UINT_FAST64_TYPE
 683 #define UINT_FAST64_TYPE ((const char *) NULL)
 684 #endif
 685
 686 #ifndef INTPTR_TYPE
 687 #define INTPTR_TYPE ((const char *) NULL)
 688 #endif
 689
 690 #ifndef UINTPTR_TYPE
 691 #define UINTPTR_TYPE ((const char *) NULL)
 692 #endif
 693
 694 /* Width in bits of a pointer.  Mind the value of the macro `Pmode'.  */
 695 #ifndef POINTER_SIZE
 696 #define POINTER_SIZE BITS_PER_WORD
 697 #endif
 698
 699 #ifndef PIC_OFFSET_TABLE_REGNUM
 700 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
 701 #endif
 702
 703 #ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
 704 #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 0
 705 #endif
 706
 707 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
 708 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
 709 #endif
 710
 711 #ifndef TARGET_DECLSPEC
 712 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
 713 /* If the target supports the "dllimport" attribute, users are
 714    probably used to the "__declspec" syntax.  */
 715 #define TARGET_DECLSPEC 1
 716 #else
 717 #define TARGET_DECLSPEC 0
 718 #endif
 719 #endif
 720
 721 /* By default, the preprocessor should be invoked the same way in C++
 722    as in C.  */
 723 #ifndef CPLUSPLUS_CPP_SPEC
 724 #ifdef CPP_SPEC
 725 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
 726 #endif
 727 #endif
 728
 729 #ifndef ACCUMULATE_OUTGOING_ARGS
 730 #define ACCUMULATE_OUTGOING_ARGS 0
 731 #endif
 732
 733 /* Supply a default definition for PUSH_ARGS.  */
 734 #ifndef PUSH_ARGS
 735 #ifdef PUSH_ROUNDING
 736 #define PUSH_ARGS       !ACCUMULATE_OUTGOING_ARGS
 737 #else
 738 #define PUSH_ARGS       0
 739 #endif
 740 #endif
 741
 742 /* Decide whether a function's arguments should be processed
 743    from first to last or from last to first.
 744
 745    They should if the stack and args grow in opposite directions, but
 746    only if we have push insns.  */
 747
 748 #ifdef PUSH_ROUNDING
 749
 750 #ifndef PUSH_ARGS_REVERSED
 751 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
 752 #define PUSH_ARGS_REVERSED  PUSH_ARGS
 753 #endif
 754 #endif
 755
 756 #endif
 757
 758 #ifndef PUSH_ARGS_REVERSED
 759 #define PUSH_ARGS_REVERSED 0
 760 #endif
 761
 762 /* Default value for the alignment (in bits) a C conformant malloc has to
 763    provide. This default is intended to be safe and always correct.  */
 764 #ifndef MALLOC_ABI_ALIGNMENT
 765 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
 766 #endif
 767
 768 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
 769    STACK_BOUNDARY is required.  */
 770 #ifndef PREFERRED_STACK_BOUNDARY
 771 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
 772 #endif
 773
 774 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not
 775    defined.  */
 776 #ifndef INCOMING_STACK_BOUNDARY
 777 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY
 778 #endif
 779
 780 #ifndef TARGET_DEFAULT_PACK_STRUCT
 781 #define TARGET_DEFAULT_PACK_STRUCT 0
 782 #endif
 783
 784 /* By default, the vtable entries are void pointers, the so the alignment
 785    is the same as pointer alignment.  The value of this macro specifies
 786    the alignment of the vtable entry in bits.  It should be defined only
 787    when special alignment is necessary.  */
 788 #ifndef TARGET_VTABLE_ENTRY_ALIGN
 789 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
 790 #endif
 791
 792 /* There are a few non-descriptor entries in the vtable at offsets below
 793    zero.  If these entries must be padded (say, to preserve the alignment
 794    specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
 795    words in each data entry.  */
 796 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
 797 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
 798 #endif
 799
 800 /* Decide whether it is safe to use a local alias for a virtual function
 801    when constructing thunks.  */
 802 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
 803 #ifdef ASM_OUTPUT_DEF
 804 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
 805 #else
 806 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
 807 #endif
 808 #endif
 809
 810 /* Select a format to encode pointers in exception handling data.  We
 811    prefer those that result in fewer dynamic relocations.  Assume no
 812    special support here and encode direct references.  */
 813 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
 814 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  DW_EH_PE_absptr
 815 #endif
 816
 817 /* By default, the C++ compiler will use the lowest bit of the pointer
 818    to function to indicate a pointer-to-member-function points to a
 819    virtual member function.  However, if FUNCTION_BOUNDARY indicates
 820    function addresses aren't always even, the lowest bit of the delta
 821    field will be used.  */
 822 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
 823 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
 824   (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
 825    ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
 826 #endif
 827
 828 #ifndef DEFAULT_GDB_EXTENSIONS
 829 #define DEFAULT_GDB_EXTENSIONS 1
 830 #endif
 831
 832 /* If more than one debugging type is supported, you must define
 833    PREFERRED_DEBUGGING_TYPE to choose the default.  */
 834
 835 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
 836          + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
 837          + defined (VMS_DEBUGGING_INFO))
 838 #ifndef PREFERRED_DEBUGGING_TYPE
 839 #error You must define PREFERRED_DEBUGGING_TYPE
 840 #endif /* no PREFERRED_DEBUGGING_TYPE */
 841
 842 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
 843    here so other code needn't care.  */
 844 #elif defined DBX_DEBUGGING_INFO
 845 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 846
 847 #elif defined SDB_DEBUGGING_INFO
 848 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
 849
 850 #elif defined DWARF2_DEBUGGING_INFO
 851 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 852
 853 #elif defined VMS_DEBUGGING_INFO
 854 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
 855
 856 #elif defined XCOFF_DEBUGGING_INFO
 857 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
 858
 859 #else
 860 /* No debugging format is supported by this target.  */
 861 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
 862 #endif
 863
 864 #ifndef LARGEST_EXPONENT_IS_NORMAL
 865 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
 866 #endif
 867
 868 #ifndef ROUND_TOWARDS_ZERO
 869 #define ROUND_TOWARDS_ZERO 0
 870 #endif
 871
 872 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
 873 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
 874 #endif
 875
 876 /* True if the targets integer-comparison functions return { 0, 1, 2
 877    } to indicate { <, ==, > }.  False if { -1, 0, 1 } is used
 878    instead.  The libgcc routines are biased.  */
 879 #ifndef TARGET_LIB_INT_CMP_BIASED
 880 #define TARGET_LIB_INT_CMP_BIASED (true)
 881 #endif
 882
 883 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
 884    then the word-endianness is the same as for integers.  */
 885 #ifndef FLOAT_WORDS_BIG_ENDIAN
 886 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 887 #endif
 888
 889 #ifdef TARGET_FLT_EVAL_METHOD
 890 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 1
 891 #else
 892 #define TARGET_FLT_EVAL_METHOD 0
 893 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 0
 894 #endif
 895
 896 #ifndef TARGET_DEC_EVAL_METHOD
 897 #define TARGET_DEC_EVAL_METHOD 2
 898 #endif
 899
 900 #ifndef HOT_TEXT_SECTION_NAME
 901 #define HOT_TEXT_SECTION_NAME ".text.hot"
 902 #endif
 903
 904 #ifndef UNLIKELY_EXECUTED_TEXT_SECTION_NAME
 905 #define UNLIKELY_EXECUTED_TEXT_SECTION_NAME ".text.unlikely"
 906 #endif
 907
 908 #ifndef HAS_LONG_COND_BRANCH
 909 #define HAS_LONG_COND_BRANCH 0
 910 #endif
 911
 912 #ifndef HAS_LONG_UNCOND_BRANCH
 913 #define HAS_LONG_UNCOND_BRANCH 0
 914 #endif
 915
 916 /* Determine whether __cxa_atexit, rather than atexit, is used to
 917    register C++ destructors for local statics and global objects.  */
 918 #ifndef DEFAULT_USE_CXA_ATEXIT
 919 #define DEFAULT_USE_CXA_ATEXIT 0
 920 #endif
 921
 922 /* If none of these macros are defined, the port must use the new
 923    technique of defining constraints in the machine description.
 924    tm_p.h will define those macros that machine-independent code
 925    still uses.  */
 926 #if  !defined CONSTRAINT_LEN                    \
 927   && !defined REG_CLASS_FROM_LETTER             \
 928   && !defined REG_CLASS_FROM_CONSTRAINT         \
 929   && !defined CONST_OK_FOR_LETTER_P             \
 930   && !defined CONST_OK_FOR_CONSTRAINT_P         \
 931   && !defined CONST_DOUBLE_OK_FOR_LETTER_P      \
 932   && !defined CONST_DOUBLE_OK_FOR_CONSTRAINT_P  \
 933   && !defined EXTRA_CONSTRAINT                  \
 934   && !defined EXTRA_CONSTRAINT_STR              \
 935   && !defined EXTRA_MEMORY_CONSTRAINT           \
 936   && !defined EXTRA_ADDRESS_CONSTRAINT
 937
 938 #define USE_MD_CONSTRAINTS
 939
 940 #if GCC_VERSION >= 3000 && defined IN_GCC
 941 /* These old constraint macros shouldn't appear anywhere in a
 942    configuration using MD constraint definitions.  */
 943 #pragma GCC poison REG_CLASS_FROM_LETTER CONST_OK_FOR_LETTER_P \
 944                    CONST_DOUBLE_OK_FOR_LETTER_P EXTRA_CONSTRAINT
 945 #endif
 946
 947 #else /* old constraint mechanism in use */
 948
 949 /* Determine whether extra constraint letter should be handled
 950    via address reload (like 'o').  */
 951 #ifndef EXTRA_MEMORY_CONSTRAINT
 952 #define EXTRA_MEMORY_CONSTRAINT(C,STR) 0
 953 #endif
 954
 955 /* Determine whether extra constraint letter should be handled
 956    as an address (like 'p').  */
 957 #ifndef EXTRA_ADDRESS_CONSTRAINT
 958 #define EXTRA_ADDRESS_CONSTRAINT(C,STR) 0
 959 #endif
 960
 961 /* When a port defines CONSTRAINT_LEN, it should use DEFAULT_CONSTRAINT_LEN
 962    for all the characters that it does not want to change, so things like the
 963   'length' of a digit in a matching constraint is an implementation detail,
 964    and not part of the interface.  */
 965 #define DEFAULT_CONSTRAINT_LEN(C,STR) 1
 966
 967 #ifndef CONSTRAINT_LEN
 968 #define CONSTRAINT_LEN(C,STR) DEFAULT_CONSTRAINT_LEN (C, STR)
 969 #endif
 970
 971 #if defined (CONST_OK_FOR_LETTER_P) && ! defined (CONST_OK_FOR_CONSTRAINT_P)
 972 #define CONST_OK_FOR_CONSTRAINT_P(VAL,C,STR) CONST_OK_FOR_LETTER_P (VAL, C)
 973 #endif
 974
 975 #if defined (CONST_DOUBLE_OK_FOR_LETTER_P) && ! defined (CONST_DOUBLE_OK_FOR_CONSTRAINT_P)
 976 #define CONST_DOUBLE_OK_FOR_CONSTRAINT_P(OP,C,STR) \
 977   CONST_DOUBLE_OK_FOR_LETTER_P (OP, C)
 978 #endif
 979
 980 #ifndef REG_CLASS_FROM_CONSTRAINT
 981 #define REG_CLASS_FROM_CONSTRAINT(C,STR) REG_CLASS_FROM_LETTER (C)
 982 #endif
 983
 984 #if defined (EXTRA_CONSTRAINT) && ! defined (EXTRA_CONSTRAINT_STR)
 985 #define EXTRA_CONSTRAINT_STR(OP, C,STR) EXTRA_CONSTRAINT (OP, C)
 986 #endif
 987
 988 #endif /* old constraint mechanism in use */
 989
 990 /* Determine whether the entire c99 runtime
 991    is present in the runtime library.  */
 992 #ifndef TARGET_C99_FUNCTIONS
 993 #define TARGET_C99_FUNCTIONS 0
 994 #endif
 995
 996 /* Determine whether the target runtime library has
 997    a sincos implementation following the GNU extension.  */
 998 #ifndef TARGET_HAS_SINCOS
 999 #define TARGET_HAS_SINCOS 0
1000 #endif
1001
1002 /* Indicate that CLZ and CTZ are undefined at zero.  */
1003 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
1004 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
1005 #endif
1006 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
1007 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
1008 #endif
1009
1010 /* Provide a default value for STORE_FLAG_VALUE.  */
1011 #ifndef STORE_FLAG_VALUE
1012 #define STORE_FLAG_VALUE  1
1013 #endif
1014
1015 /* This macro is used to determine what the largest unit size that
1016    move_by_pieces can use is.  */
1017
1018 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
1019    move efficiently, as opposed to  MOVE_MAX which is the maximum
1020    number of bytes we can move with a single instruction.  */
1021
1022 #ifndef MOVE_MAX_PIECES
1023 #define MOVE_MAX_PIECES   MOVE_MAX
1024 #endif
1025
1026 #ifndef MAX_MOVE_MAX
1027 #define MAX_MOVE_MAX MOVE_MAX
1028 #endif
1029
1030 #ifndef MIN_UNITS_PER_WORD
1031 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
1032 #endif
1033
1034 #ifndef MAX_BITS_PER_WORD
1035 #define MAX_BITS_PER_WORD BITS_PER_WORD
1036 #endif
1037
1038 #ifndef STACK_POINTER_OFFSET
1039 #define STACK_POINTER_OFFSET    0
1040 #endif
1041
1042 #ifndef LOCAL_REGNO
1043 #define LOCAL_REGNO(REGNO)  0
1044 #endif
1045
1046 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1047    the stack pointer does not matter.  The value is tested only in
1048    functions that have frame pointers.  */
1049 #ifndef EXIT_IGNORE_STACK
1050 #define EXIT_IGNORE_STACK 0
1051 #endif
1052
1053 /* Assume that case vectors are not pc-relative.  */
1054 #ifndef CASE_VECTOR_PC_RELATIVE
1055 #define CASE_VECTOR_PC_RELATIVE 0
1056 #endif
1057
1058 /* Assume that trampolines need function alignment.  */
1059 #ifndef TRAMPOLINE_ALIGNMENT
1060 #define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY
1061 #endif
1062
1063 /* Register mappings for target machines without register windows.  */
1064 #ifndef INCOMING_REGNO
1065 #define INCOMING_REGNO(N) (N)
1066 #endif
1067
1068 #ifndef OUTGOING_REGNO
1069 #define OUTGOING_REGNO(N) (N)
1070 #endif
1071
1072 #ifndef SHIFT_COUNT_TRUNCATED
1073 #define SHIFT_COUNT_TRUNCATED 0
1074 #endif
1075
1076 #ifndef LEGITIMATE_PIC_OPERAND_P
1077 #define LEGITIMATE_PIC_OPERAND_P(X) 1
1078 #endif
1079
1080 #ifndef TARGET_MEM_CONSTRAINT
1081 #define TARGET_MEM_CONSTRAINT 'm'
1082 #endif
1083
1084 #ifndef REVERSIBLE_CC_MODE
1085 #define REVERSIBLE_CC_MODE(MODE) 0
1086 #endif
1087
1088 /* Biggest alignment supported by the object file format of this machine.  */
1089 #ifndef MAX_OFILE_ALIGNMENT
1090 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
1091 #endif
1092
1093 #ifndef FRAME_GROWS_DOWNWARD
1094 #define FRAME_GROWS_DOWNWARD 0
1095 #endif
1096
1097 /* On most machines, the CFA coincides with the first incoming parm.  */
1098 #ifndef ARG_POINTER_CFA_OFFSET
1099 #define ARG_POINTER_CFA_OFFSET(FNDECL) \
1100   (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
1101 #endif
1102
1103 /* On most machines, we use the CFA as DW_AT_frame_base.  */
1104 #ifndef CFA_FRAME_BASE_OFFSET
1105 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0
1106 #endif
1107
1108 /* The offset from the incoming value of %sp to the top of the stack frame
1109    for the current function.  */
1110 #ifndef INCOMING_FRAME_SP_OFFSET
1111 #define INCOMING_FRAME_SP_OFFSET 0
1112 #endif
1113
1114 #ifndef HARD_REGNO_NREGS_HAS_PADDING
1115 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
1116 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
1117 #endif
1118
1119 #ifndef OUTGOING_REG_PARM_STACK_SPACE
1120 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
1121 #endif
1122
1123 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
1124    the backend.  MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
1125    effort stack alignment supported by the backend.  If the backend
1126    supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
1127    MAX_STACK_ALIGNMENT are the same.  Otherwise, the incoming stack
1128    boundary will limit the maximum guaranteed stack alignment.  */
1129 #ifdef MAX_STACK_ALIGNMENT
1130 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
1131 #else
1132 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY
1133 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
1134 #endif
1135
1136 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
1137
1138 #ifndef LOCAL_ALIGNMENT
1139 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
1140 #endif
1141
1142 #ifndef STACK_SLOT_ALIGNMENT
1143 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
1144   ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
1145 #endif
1146
1147 #ifndef LOCAL_DECL_ALIGNMENT
1148 #define LOCAL_DECL_ALIGNMENT(DECL) \
1149   LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
1150 #endif
1151
1152 #ifndef MINIMUM_ALIGNMENT
1153 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN)
1154 #endif
1155
1156 /* Alignment value for attribute ((aligned)).  */
1157 #ifndef ATTRIBUTE_ALIGNED_VALUE
1158 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
1159 #endif
1160
1161 /* Many ports have no mode-dependent addresses (except possibly autoincrement
1162    and autodecrement addresses, which are handled by target-independent code
1163    in recog.c).  */
1164 #ifndef GO_IF_MODE_DEPENDENT_ADDRESS
1165 #define GO_IF_MODE_DEPENDENT_ADDRESS(X, WIN)
1166 #endif
1167
1168 /* For most ports anything that evaluates to a constant symbolic
1169    or integer value is acceptable as a constant address.  */
1170 #ifndef CONSTANT_ADDRESS_P
1171 #define CONSTANT_ADDRESS_P(X)   (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE)
1172 #endif
1173
1174 #ifndef MAX_FIXED_MODE_SIZE
1175 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
1176 #endif
1177
1178 /* Nonzero if structures and unions should be returned in memory.
1179
1180    This should only be defined if compatibility with another compiler or
1181    with an ABI is needed, because it results in slower code.  */
1182
1183 #ifndef DEFAULT_PCC_STRUCT_RETURN
1184 #define DEFAULT_PCC_STRUCT_RETURN 1
1185 #endif
1186
1187 #ifdef GCC_INSN_FLAGS_H
1188 /* Dependent default target macro definitions
1189
1190    This section of defaults.h defines target macros that depend on generated
1191    headers.  This is a bit awkward:  We want to put all default definitions
1192    for target macros in defaults.h, but some of the defaults depend on the
1193    HAVE_* flags defines of insn-flags.h.  But insn-flags.h is not always
1194    included by files that do include defaults.h.
1195
1196    Fortunately, the default macro definitions that depend on the HAVE_*
1197    macros are also the ones that will only be used inside GCC itself, i.e.
1198    not in the gen* programs or in target objects like libgcc.
1199
1200    Obviously, it would be best to keep this section of defaults.h as small
1201    as possible, by converting the macros defined below to target hooks or
1202    functions.
1203 */
1204
1205 /* The default branch cost is 1.  */
1206 #ifndef BRANCH_COST
1207 #define BRANCH_COST(speed_p, predictable_p) 1
1208 #endif
1209
1210 /* If a memory-to-memory move would take MOVE_RATIO or more simple
1211    move-instruction sequences, we will do a movmem or libcall instead.  */
1212
1213 #ifndef MOVE_RATIO
1214 #if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti)
1215 #define MOVE_RATIO(speed) 2
1216 #else
1217 /* If we are optimizing for space (-Os), cut down the default move ratio.  */
1218 #define MOVE_RATIO(speed) ((speed) ? 15 : 3)
1219 #endif
1220 #endif
1221
1222 /* If a clear memory operation would take CLEAR_RATIO or more simple
1223    move-instruction sequences, we will do a setmem or libcall instead.  */
1224
1225 #ifndef CLEAR_RATIO
1226 #if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
1227 #define CLEAR_RATIO(speed) 2
1228 #else
1229 /* If we are optimizing for space, cut down the default clear ratio.  */
1230 #define CLEAR_RATIO(speed) ((speed) ? 15 :3)
1231 #endif
1232 #endif
1233
1234 /* If a memory set (to value other than zero) operation would take
1235    SET_RATIO or more simple move-instruction sequences, we will do a movmem
1236    or libcall instead.  */
1237 #ifndef SET_RATIO
1238 #define SET_RATIO(speed) MOVE_RATIO(speed)
1239 #endif
1240
1241 /* Supply a default definition for FUNCTION_ARG_PADDING:
1242    usually pad upward, but pad short args downward on
1243    big-endian machines.  */
1244
1245 #define DEFAULT_FUNCTION_ARG_PADDING(MODE, TYPE)                        \
1246   (! BYTES_BIG_ENDIAN                                                   \
1247    ? upward                                                             \
1248    : (((MODE) == BLKmode                                                \
1249        ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST         \
1250           && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \
1251        : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY)                       \
1252       ? downward : upward))
1253
1254 #ifndef FUNCTION_ARG_PADDING
1255 #define FUNCTION_ARG_PADDING(MODE, TYPE)        \
1256   DEFAULT_FUNCTION_ARG_PADDING ((MODE), (TYPE))
1257 #endif
1258
1259 /* Supply a default definition for FUNCTION_ARG_BOUNDARY.  Normally, we let
1260    FUNCTION_ARG_PADDING, which also pads the length, handle any needed
1261    alignment.  */
1262
1263 #ifndef FUNCTION_ARG_BOUNDARY
1264 #define FUNCTION_ARG_BOUNDARY(MODE, TYPE)       PARM_BOUNDARY
1265 #endif
1266
1267 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
1268    Normally move_insn, so Pmode stack pointer.  */
1269
1270 #ifndef STACK_SAVEAREA_MODE
1271 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
1272 #endif
1273
1274 /* Supply a default definition of STACK_SIZE_MODE for
1275    allocate_dynamic_stack_space.  Normally PLUS/MINUS, so word_mode.  */
1276
1277 #ifndef STACK_SIZE_MODE
1278 #define STACK_SIZE_MODE word_mode
1279 #endif
1280
1281 /* Provide default values for the macros controlling stack checking.  */
1282
1283 /* The default is neither full builtin stack checking...  */
1284 #ifndef STACK_CHECK_BUILTIN
1285 #define STACK_CHECK_BUILTIN 0
1286 #endif
1287
1288 /* ...nor static builtin stack checking.  */
1289 #ifndef STACK_CHECK_STATIC_BUILTIN
1290 #define STACK_CHECK_STATIC_BUILTIN 0
1291 #endif
1292
1293 /* The default interval is one page (4096 bytes).  */
1294 #ifndef STACK_CHECK_PROBE_INTERVAL_EXP
1295 #define STACK_CHECK_PROBE_INTERVAL_EXP 12
1296 #endif
1297
1298 /* The default is not to move the stack pointer.  */
1299 #ifndef STACK_CHECK_MOVING_SP
1300 #define STACK_CHECK_MOVING_SP 0
1301 #endif
1302
1303 /* This is a kludge to try to capture the discrepancy between the old
1304    mechanism (generic stack checking) and the new mechanism (static
1305    builtin stack checking).  STACK_CHECK_PROTECT needs to be bumped
1306    for the latter because part of the protection area is effectively
1307    included in STACK_CHECK_MAX_FRAME_SIZE for the former.  */
1308 #ifdef STACK_CHECK_PROTECT
1309 #define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
1310 #else
1311 #define STACK_OLD_CHECK_PROTECT \
1312  (targetm.except_unwind_info () == UI_SJLJ ? 75 * UNITS_PER_WORD : 8 * 1024)
1313 #endif
1314
1315 /* Minimum amount of stack required to recover from an anticipated stack
1316    overflow detection.  The default value conveys an estimate of the amount
1317    of stack required to propagate an exception.  */
1318 #ifndef STACK_CHECK_PROTECT
1319 #define STACK_CHECK_PROTECT \
1320  (targetm.except_unwind_info () == UI_SJLJ ? 75 * UNITS_PER_WORD : 12 * 1024)
1321 #endif
1322
1323 /* Make the maximum frame size be the largest we can and still only need
1324    one probe per function.  */
1325 #ifndef STACK_CHECK_MAX_FRAME_SIZE
1326 #define STACK_CHECK_MAX_FRAME_SIZE \
1327   ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD)
1328 #endif
1329
1330 /* This is arbitrary, but should be large enough everywhere.  */
1331 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
1332 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
1333 #endif
1334
1335 /* Provide a reasonable default for the maximum size of an object to
1336    allocate in the fixed frame.  We may need to be able to make this
1337    controllable by the user at some point.  */
1338 #ifndef STACK_CHECK_MAX_VAR_SIZE
1339 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
1340 #endif
1341
1342 /* By default, the C++ compiler will use function addresses in the
1343    vtable entries.  Setting this nonzero tells the compiler to use
1344    function descriptors instead.  The value of this macro says how
1345    many words wide the descriptor is (normally 2).  It is assumed
1346    that the address of a function descriptor may be treated as a
1347    pointer to a function.  */
1348 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
1349 #define TARGET_VTABLE_USES_DESCRIPTORS 0
1350 #endif
1351
1352 #ifndef SWITCHABLE_TARGET
1353 #define SWITCHABLE_TARGET 0
1354 #endif
1355
1356 #endif /* GCC_INSN_FLAGS_H  */
1357
1358 #endif  /* ! GCC_DEFAULTS_H */