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 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 a static function or 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 /* Output the definition of a compiler-generated label named NAME.  */
 144 #ifndef ASM_OUTPUT_INTERNAL_LABEL
 145 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,NAME)    \
 146   do {                                          \
 147     assemble_name_raw ((FILE), (NAME));         \
 148     fputs (":\n", (FILE));                      \
 149   } while (0)
 150 #endif
 151
 152 /* This is how to output a reference to a user-level label named NAME.  */
 153
 154 #ifndef ASM_OUTPUT_LABELREF
 155 #define ASM_OUTPUT_LABELREF(FILE,NAME)  asm_fprintf ((FILE), "%U%s", (NAME))
 156 #endif
 157
 158 /* Allow target to print debug info labels specially.  This is useful for
 159    VLIW targets, since debug info labels should go into the middle of
 160    instruction bundles instead of breaking them.  */
 161
 162 #ifndef ASM_OUTPUT_DEBUG_LABEL
 163 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
 164   (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM)
 165 #endif
 166
 167 /* This is how we tell the assembler that a symbol is weak.  */
 168 #ifndef ASM_OUTPUT_WEAK_ALIAS
 169 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
 170 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE)      \
 171   do                                                    \
 172     {                                                   \
 173       ASM_WEAKEN_LABEL (STREAM, NAME);                  \
 174       if (VALUE)                                        \
 175         ASM_OUTPUT_DEF (STREAM, NAME, VALUE);           \
 176     }                                                   \
 177   while (0)
 178 #endif
 179 #endif
 180
 181 /* This is how we tell the assembler that a symbol is a weak alias to
 182    another symbol that doesn't require the other symbol to be defined.
 183    Uses of the former will turn into weak uses of the latter, i.e.,
 184    uses that, in case the latter is undefined, will not cause errors,
 185    and will add it to the symbol table as weak undefined.  However, if
 186    the latter is referenced directly, a strong reference prevails.  */
 187 #ifndef ASM_OUTPUT_WEAKREF
 188 #if defined HAVE_GAS_WEAKREF
 189 #define ASM_OUTPUT_WEAKREF(FILE, DECL, NAME, VALUE)                     \
 190   do                                                                    \
 191     {                                                                   \
 192       fprintf ((FILE), "\t.weakref\t");                                 \
 193       assemble_name ((FILE), (NAME));                                   \
 194       fprintf ((FILE), ",");                                            \
 195       assemble_name ((FILE), (VALUE));                                  \
 196       fprintf ((FILE), "\n");                                           \
 197     }                                                                   \
 198   while (0)
 199 #endif
 200 #endif
 201
 202 /* How to emit a .type directive.  */
 203 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE
 204 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT
 205 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE)   \
 206   do                                                    \
 207     {                                                   \
 208       fputs (TYPE_ASM_OP, STREAM);                      \
 209       assemble_name (STREAM, NAME);                     \
 210       fputs (", ", STREAM);                             \
 211       fprintf (STREAM, TYPE_OPERAND_FMT, TYPE);         \
 212       putc ('\n', STREAM);                              \
 213     }                                                   \
 214   while (0)
 215 #endif
 216 #endif
 217
 218 /* How to emit a .size directive.  */
 219 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE
 220 #ifdef SIZE_ASM_OP
 221 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE)   \
 222   do                                                    \
 223     {                                                   \
 224       HOST_WIDE_INT size_ = (SIZE);                     \
 225       fputs (SIZE_ASM_OP, STREAM);                      \
 226       assemble_name (STREAM, NAME);                     \
 227       fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \
 228     }                                                   \
 229   while (0)
 230
 231 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME)          \
 232   do                                                    \
 233     {                                                   \
 234       fputs (SIZE_ASM_OP, STREAM);                      \
 235       assemble_name (STREAM, NAME);                     \
 236       fputs (", .-", STREAM);                           \
 237       assemble_name (STREAM, NAME);                     \
 238       putc ('\n', STREAM);                              \
 239     }                                                   \
 240   while (0)
 241
 242 #endif
 243 #endif
 244
 245 /* This determines whether or not we support weak symbols.  */
 246 #ifndef SUPPORTS_WEAK
 247 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
 248 #define SUPPORTS_WEAK 1
 249 #else
 250 #define SUPPORTS_WEAK 0
 251 #endif
 252 #endif
 253
 254 /* This determines whether or not we support the discriminator
 255    attribute in the .loc directive.  */
 256 #ifndef SUPPORTS_DISCRIMINATOR
 257 #ifdef HAVE_GAS_DISCRIMINATOR
 258 #define SUPPORTS_DISCRIMINATOR 1
 259 #else
 260 #define SUPPORTS_DISCRIMINATOR 0
 261 #endif
 262 #endif
 263
 264 /* This determines whether or not we support link-once semantics.  */
 265 #ifndef SUPPORTS_ONE_ONLY
 266 #ifdef MAKE_DECL_ONE_ONLY
 267 #define SUPPORTS_ONE_ONLY 1
 268 #else
 269 #define SUPPORTS_ONE_ONLY 0
 270 #endif
 271 #endif
 272
 273 /* This determines whether weak symbols must be left out of a static
 274    archive's table of contents.  Defining this macro to be nonzero has
 275    the consequence that certain symbols will not be made weak that
 276    otherwise would be.  The C++ ABI requires this macro to be zero;
 277    see the documentation.  */
 278 #ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 279 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
 280 #endif
 281
 282 /* This determines whether or not we need linkonce unwind information.  */
 283 #ifndef TARGET_USES_WEAK_UNWIND_INFO
 284 #define TARGET_USES_WEAK_UNWIND_INFO 0
 285 #endif
 286
 287 /* By default, there is no prefix on user-defined symbols.  */
 288 #ifndef USER_LABEL_PREFIX
 289 #define USER_LABEL_PREFIX ""
 290 #endif
 291
 292 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
 293    provide a weak attribute.  Else define it to nothing.
 294
 295    This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
 296    not available at that time.
 297
 298    Note, this is only for use by target files which we know are to be
 299    compiled by GCC.  */
 300 #ifndef TARGET_ATTRIBUTE_WEAK
 301 # if SUPPORTS_WEAK
 302 #  define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
 303 # else
 304 #  define TARGET_ATTRIBUTE_WEAK
 305 # endif
 306 #endif
 307
 308 /* Determines whether we may use common symbols to represent one-only
 309    semantics (a.k.a. "vague linkage").  */
 310 #ifndef USE_COMMON_FOR_ONE_ONLY
 311 # define USE_COMMON_FOR_ONE_ONLY 1
 312 #endif
 313
 314 /* By default we can assume that all global symbols are in one namespace,
 315    across all shared libraries.  */
 316 #ifndef MULTIPLE_SYMBOL_SPACES
 317 # define MULTIPLE_SYMBOL_SPACES 0
 318 #endif
 319
 320 /* If the target supports init_priority C++ attribute, give
 321    SUPPORTS_INIT_PRIORITY a nonzero value.  */
 322 #ifndef SUPPORTS_INIT_PRIORITY
 323 #define SUPPORTS_INIT_PRIORITY 1
 324 #endif /* SUPPORTS_INIT_PRIORITY */
 325
 326 /* If duplicate library search directories can be removed from a
 327    linker command without changing the linker's semantics, give this
 328    symbol a nonzero.  */
 329 #ifndef LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
 330 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 0
 331 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
 332
 333 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
 334    the rest of the DWARF 2 frame unwind support is also provided.  */
 335 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX) \
 336     && !defined (TARGET_UNWIND_INFO)
 337 #define DWARF2_UNWIND_INFO 1
 338 #endif
 339
 340 /* If we have named sections, and we're using crtstuff to run ctors,
 341    use them for registering eh frame information.  */
 342 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
 343     && !defined(EH_FRAME_IN_DATA_SECTION)
 344 #ifndef EH_FRAME_SECTION_NAME
 345 #define EH_FRAME_SECTION_NAME ".eh_frame"
 346 #endif
 347 #endif
 348
 349 /* On many systems, different EH table encodings are used under
 350    difference circumstances.  Some will require runtime relocations;
 351    some will not.  For those that do not require runtime relocations,
 352    we would like to make the table read-only.  However, since the
 353    read-only tables may need to be combined with read-write tables
 354    that do require runtime relocation, it is not safe to make the
 355    tables read-only unless the linker will merge read-only and
 356    read-write sections into a single read-write section.  If your
 357    linker does not have this ability, but your system is such that no
 358    encoding used with non-PIC code will ever require a runtime
 359    relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in
 360    your target configuration file.  */
 361 #ifndef EH_TABLES_CAN_BE_READ_ONLY
 362 #ifdef HAVE_LD_RO_RW_SECTION_MIXING
 363 #define EH_TABLES_CAN_BE_READ_ONLY 1
 364 #else
 365 #define EH_TABLES_CAN_BE_READ_ONLY 0
 366 #endif
 367 #endif
 368
 369 /* If we have named section and we support weak symbols, then use the
 370    .jcr section for recording java classes which need to be registered
 371    at program start-up time.  */
 372 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
 373 #ifndef JCR_SECTION_NAME
 374 #define JCR_SECTION_NAME ".jcr"
 375 #endif
 376 #endif
 377
 378 /* This decision to use a .jcr section can be overridden by defining
 379    USE_JCR_SECTION to 0 in target file.  This is necessary if target
 380    can define JCR_SECTION_NAME but does not have crtstuff or
 381    linker support for .jcr section.  */
 382 #ifndef TARGET_USE_JCR_SECTION
 383 #ifdef JCR_SECTION_NAME
 384 #define TARGET_USE_JCR_SECTION 1
 385 #else
 386 #define TARGET_USE_JCR_SECTION 0
 387 #endif
 388 #endif
 389
 390 /* Number of hardware registers that go into the DWARF-2 unwind info.
 391    If not defined, equals FIRST_PSEUDO_REGISTER  */
 392
 393 #ifndef DWARF_FRAME_REGISTERS
 394 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
 395 #endif
 396
 397 /* How to renumber registers for dbx and gdb.  If not defined, assume
 398    no renumbering is necessary.  */
 399
 400 #ifndef DBX_REGISTER_NUMBER
 401 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 402 #endif
 403
 404 /* Default sizes for base C types.  If the sizes are different for
 405    your target, you should override these values by defining the
 406    appropriate symbols in your tm.h file.  */
 407
 408 #ifndef BITS_PER_UNIT
 409 #define BITS_PER_UNIT 8
 410 #endif
 411
 412 #ifndef BITS_PER_WORD
 413 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
 414 #endif
 415
 416 #ifndef CHAR_TYPE_SIZE
 417 #define CHAR_TYPE_SIZE BITS_PER_UNIT
 418 #endif
 419
 420 #ifndef BOOL_TYPE_SIZE
 421 /* `bool' has size and alignment `1', on almost all platforms.  */
 422 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
 423 #endif
 424
 425 #ifndef SHORT_TYPE_SIZE
 426 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
 427 #endif
 428
 429 #ifndef INT_TYPE_SIZE
 430 #define INT_TYPE_SIZE BITS_PER_WORD
 431 #endif
 432
 433 #ifndef LONG_TYPE_SIZE
 434 #define LONG_TYPE_SIZE BITS_PER_WORD
 435 #endif
 436
 437 #ifndef LONG_LONG_TYPE_SIZE
 438 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
 439 #endif
 440
 441 #ifndef WCHAR_TYPE_SIZE
 442 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
 443 #endif
 444
 445 #ifndef FLOAT_TYPE_SIZE
 446 #define FLOAT_TYPE_SIZE BITS_PER_WORD
 447 #endif
 448
 449 #ifndef DOUBLE_TYPE_SIZE
 450 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 451 #endif
 452
 453 #ifndef LONG_DOUBLE_TYPE_SIZE
 454 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 455 #endif
 456
 457 #ifndef DECIMAL32_TYPE_SIZE
 458 #define DECIMAL32_TYPE_SIZE 32
 459 #endif
 460
 461 #ifndef DECIMAL64_TYPE_SIZE
 462 #define DECIMAL64_TYPE_SIZE 64
 463 #endif
 464
 465 #ifndef DECIMAL128_TYPE_SIZE
 466 #define DECIMAL128_TYPE_SIZE 128
 467 #endif
 468
 469 #ifndef SHORT_FRACT_TYPE_SIZE
 470 #define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT
 471 #endif
 472
 473 #ifndef FRACT_TYPE_SIZE
 474 #define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2)
 475 #endif
 476
 477 #ifndef LONG_FRACT_TYPE_SIZE
 478 #define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4)
 479 #endif
 480
 481 #ifndef LONG_LONG_FRACT_TYPE_SIZE
 482 #define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8)
 483 #endif
 484
 485 #ifndef SHORT_ACCUM_TYPE_SIZE
 486 #define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2)
 487 #endif
 488
 489 #ifndef ACCUM_TYPE_SIZE
 490 #define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2)
 491 #endif
 492
 493 #ifndef LONG_ACCUM_TYPE_SIZE
 494 #define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2)
 495 #endif
 496
 497 #ifndef LONG_LONG_ACCUM_TYPE_SIZE
 498 #define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2)
 499 #endif
 500
 501 /* We let tm.h override the types used here, to handle trivial differences
 502    such as the choice of unsigned int or long unsigned int for size_t.
 503    When machines start needing nontrivial differences in the size type,
 504    it would be best to do something here to figure out automatically
 505    from other information what type to use.  */
 506
 507 #ifndef SIZE_TYPE
 508 #define SIZE_TYPE "long unsigned int"
 509 #endif
 510
 511 #ifndef PID_TYPE
 512 #define PID_TYPE "int"
 513 #endif
 514
 515 /* If GCC knows the exact uint_least16_t and uint_least32_t types from
 516    <stdint.h>, use them for char16_t and char32_t.  Otherwise, use
 517    these guesses; getting the wrong type of a given width will not
 518    affect C++ name mangling because in C++ these are distinct types
 519    not typedefs.  */
 520
 521 #ifdef UINT_LEAST16_TYPE
 522 #define CHAR16_TYPE UINT_LEAST16_TYPE
 523 #else
 524 #define CHAR16_TYPE "short unsigned int"
 525 #endif
 526
 527 #ifdef UINT_LEAST32_TYPE
 528 #define CHAR32_TYPE UINT_LEAST32_TYPE
 529 #else
 530 #define CHAR32_TYPE "unsigned int"
 531 #endif
 532
 533 #ifndef WCHAR_TYPE
 534 #define WCHAR_TYPE "int"
 535 #endif
 536
 537 /* WCHAR_TYPE gets overridden by -fshort-wchar.  */
 538 #define MODIFIED_WCHAR_TYPE \
 539         (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE)
 540
 541 #ifndef PTRDIFF_TYPE
 542 #define PTRDIFF_TYPE "long int"
 543 #endif
 544
 545 #ifndef WINT_TYPE
 546 #define WINT_TYPE "unsigned int"
 547 #endif
 548
 549 #ifndef INTMAX_TYPE
 550 #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)     \
 551                      ? "int"                                    \
 552                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 553                         ? "long int"                            \
 554                         : "long long int"))
 555 #endif
 556
 557 #ifndef UINTMAX_TYPE
 558 #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)    \
 559                      ? "unsigned int"                           \
 560                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 561                         ? "long unsigned int"                   \
 562                         : "long long unsigned int"))
 563 #endif
 564
 565
 566 /* There are no default definitions of these <stdint.h> types.  */
 567
 568 #ifndef SIG_ATOMIC_TYPE
 569 #define SIG_ATOMIC_TYPE ((const char *) NULL)
 570 #endif
 571
 572 #ifndef INT8_TYPE
 573 #define INT8_TYPE ((const char *) NULL)
 574 #endif
 575
 576 #ifndef INT16_TYPE
 577 #define INT16_TYPE ((const char *) NULL)
 578 #endif
 579
 580 #ifndef INT32_TYPE
 581 #define INT32_TYPE ((const char *) NULL)
 582 #endif
 583
 584 #ifndef INT64_TYPE
 585 #define INT64_TYPE ((const char *) NULL)
 586 #endif
 587
 588 #ifndef UINT8_TYPE
 589 #define UINT8_TYPE ((const char *) NULL)
 590 #endif
 591
 592 #ifndef UINT16_TYPE
 593 #define UINT16_TYPE ((const char *) NULL)
 594 #endif
 595
 596 #ifndef UINT32_TYPE
 597 #define UINT32_TYPE ((const char *) NULL)
 598 #endif
 599
 600 #ifndef UINT64_TYPE
 601 #define UINT64_TYPE ((const char *) NULL)
 602 #endif
 603
 604 #ifndef INT_LEAST8_TYPE
 605 #define INT_LEAST8_TYPE ((const char *) NULL)
 606 #endif
 607
 608 #ifndef INT_LEAST16_TYPE
 609 #define INT_LEAST16_TYPE ((const char *) NULL)
 610 #endif
 611
 612 #ifndef INT_LEAST32_TYPE
 613 #define INT_LEAST32_TYPE ((const char *) NULL)
 614 #endif
 615
 616 #ifndef INT_LEAST64_TYPE
 617 #define INT_LEAST64_TYPE ((const char *) NULL)
 618 #endif
 619
 620 #ifndef UINT_LEAST8_TYPE
 621 #define UINT_LEAST8_TYPE ((const char *) NULL)
 622 #endif
 623
 624 #ifndef UINT_LEAST16_TYPE
 625 #define UINT_LEAST16_TYPE ((const char *) NULL)
 626 #endif
 627
 628 #ifndef UINT_LEAST32_TYPE
 629 #define UINT_LEAST32_TYPE ((const char *) NULL)
 630 #endif
 631
 632 #ifndef UINT_LEAST64_TYPE
 633 #define UINT_LEAST64_TYPE ((const char *) NULL)
 634 #endif
 635
 636 #ifndef INT_FAST8_TYPE
 637 #define INT_FAST8_TYPE ((const char *) NULL)
 638 #endif
 639
 640 #ifndef INT_FAST16_TYPE
 641 #define INT_FAST16_TYPE ((const char *) NULL)
 642 #endif
 643
 644 #ifndef INT_FAST32_TYPE
 645 #define INT_FAST32_TYPE ((const char *) NULL)
 646 #endif
 647
 648 #ifndef INT_FAST64_TYPE
 649 #define INT_FAST64_TYPE ((const char *) NULL)
 650 #endif
 651
 652 #ifndef UINT_FAST8_TYPE
 653 #define UINT_FAST8_TYPE ((const char *) NULL)
 654 #endif
 655
 656 #ifndef UINT_FAST16_TYPE
 657 #define UINT_FAST16_TYPE ((const char *) NULL)
 658 #endif
 659
 660 #ifndef UINT_FAST32_TYPE
 661 #define UINT_FAST32_TYPE ((const char *) NULL)
 662 #endif
 663
 664 #ifndef UINT_FAST64_TYPE
 665 #define UINT_FAST64_TYPE ((const char *) NULL)
 666 #endif
 667
 668 #ifndef INTPTR_TYPE
 669 #define INTPTR_TYPE ((const char *) NULL)
 670 #endif
 671
 672 #ifndef UINTPTR_TYPE
 673 #define UINTPTR_TYPE ((const char *) NULL)
 674 #endif
 675
 676 /* Width in bits of a pointer.  Mind the value of the macro `Pmode'.  */
 677 #ifndef POINTER_SIZE
 678 #define POINTER_SIZE BITS_PER_WORD
 679 #endif
 680
 681 #ifndef PIC_OFFSET_TABLE_REGNUM
 682 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
 683 #endif
 684
 685 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
 686 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
 687 #endif
 688
 689 #ifndef TARGET_DECLSPEC
 690 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
 691 /* If the target supports the "dllimport" attribute, users are
 692    probably used to the "__declspec" syntax.  */
 693 #define TARGET_DECLSPEC 1
 694 #else
 695 #define TARGET_DECLSPEC 0
 696 #endif
 697 #endif
 698
 699 /* By default, the preprocessor should be invoked the same way in C++
 700    as in C.  */
 701 #ifndef CPLUSPLUS_CPP_SPEC
 702 #ifdef CPP_SPEC
 703 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
 704 #endif
 705 #endif
 706
 707 #ifndef ACCUMULATE_OUTGOING_ARGS
 708 #define ACCUMULATE_OUTGOING_ARGS 0
 709 #endif
 710
 711 /* Supply a default definition for PUSH_ARGS.  */
 712 #ifndef PUSH_ARGS
 713 #ifdef PUSH_ROUNDING
 714 #define PUSH_ARGS       !ACCUMULATE_OUTGOING_ARGS
 715 #else
 716 #define PUSH_ARGS       0
 717 #endif
 718 #endif
 719
 720 /* Decide whether a function's arguments should be processed
 721    from first to last or from last to first.
 722
 723    They should if the stack and args grow in opposite directions, but
 724    only if we have push insns.  */
 725
 726 #ifdef PUSH_ROUNDING
 727
 728 #ifndef PUSH_ARGS_REVERSED
 729 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
 730 #define PUSH_ARGS_REVERSED  PUSH_ARGS
 731 #endif
 732 #endif
 733
 734 #endif
 735
 736 #ifndef PUSH_ARGS_REVERSED
 737 #define PUSH_ARGS_REVERSED 0
 738 #endif
 739
 740 /* Default value for the alignment (in bits) a C conformant malloc has to
 741    provide. This default is intended to be safe and always correct.  */
 742 #ifndef MALLOC_ABI_ALIGNMENT
 743 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
 744 #endif
 745
 746 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
 747    STACK_BOUNDARY is required.  */
 748 #ifndef PREFERRED_STACK_BOUNDARY
 749 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
 750 #endif
 751
 752 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not
 753    defined.  */
 754 #ifndef INCOMING_STACK_BOUNDARY
 755 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY
 756 #endif
 757
 758 #ifndef TARGET_DEFAULT_PACK_STRUCT
 759 #define TARGET_DEFAULT_PACK_STRUCT 0
 760 #endif
 761
 762 /* By default, the C++ compiler will use function addresses in the
 763    vtable entries.  Setting this nonzero tells the compiler to use
 764    function descriptors instead.  The value of this macro says how
 765    many words wide the descriptor is (normally 2).  It is assumed
 766    that the address of a function descriptor may be treated as a
 767    pointer to a function.  */
 768 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
 769 #define TARGET_VTABLE_USES_DESCRIPTORS 0
 770 #endif
 771
 772 /* By default, the vtable entries are void pointers, the so the alignment
 773    is the same as pointer alignment.  The value of this macro specifies
 774    the alignment of the vtable entry in bits.  It should be defined only
 775    when special alignment is necessary.  */
 776 #ifndef TARGET_VTABLE_ENTRY_ALIGN
 777 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
 778 #endif
 779
 780 /* There are a few non-descriptor entries in the vtable at offsets below
 781    zero.  If these entries must be padded (say, to preserve the alignment
 782    specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
 783    words in each data entry.  */
 784 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
 785 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
 786 #endif
 787
 788 /* Decide whether it is safe to use a local alias for a virtual function
 789    when constructing thunks.  */
 790 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
 791 #ifdef ASM_OUTPUT_DEF
 792 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
 793 #else
 794 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
 795 #endif
 796 #endif
 797
 798 /* Select a format to encode pointers in exception handling data.  We
 799    prefer those that result in fewer dynamic relocations.  Assume no
 800    special support here and encode direct references.  */
 801 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
 802 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  DW_EH_PE_absptr
 803 #endif
 804
 805 /* By default, the C++ compiler will use the lowest bit of the pointer
 806    to function to indicate a pointer-to-member-function points to a
 807    virtual member function.  However, if FUNCTION_BOUNDARY indicates
 808    function addresses aren't always even, the lowest bit of the delta
 809    field will be used.  */
 810 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
 811 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
 812   (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
 813    ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
 814 #endif
 815
 816 #ifndef DEFAULT_GDB_EXTENSIONS
 817 #define DEFAULT_GDB_EXTENSIONS 1
 818 #endif
 819
 820 /* If more than one debugging type is supported, you must define
 821    PREFERRED_DEBUGGING_TYPE to choose the default.  */
 822
 823 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
 824          + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
 825          + defined (VMS_DEBUGGING_INFO))
 826 #ifndef PREFERRED_DEBUGGING_TYPE
 827 #error You must define PREFERRED_DEBUGGING_TYPE
 828 #endif /* no PREFERRED_DEBUGGING_TYPE */
 829
 830 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
 831    here so other code needn't care.  */
 832 #elif defined DBX_DEBUGGING_INFO
 833 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 834
 835 #elif defined SDB_DEBUGGING_INFO
 836 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
 837
 838 #elif defined DWARF2_DEBUGGING_INFO
 839 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 840
 841 #elif defined VMS_DEBUGGING_INFO
 842 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
 843
 844 #elif defined XCOFF_DEBUGGING_INFO
 845 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
 846
 847 #else
 848 /* No debugging format is supported by this target.  */
 849 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
 850 #endif
 851
 852 #ifndef LARGEST_EXPONENT_IS_NORMAL
 853 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
 854 #endif
 855
 856 #ifndef ROUND_TOWARDS_ZERO
 857 #define ROUND_TOWARDS_ZERO 0
 858 #endif
 859
 860 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
 861 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
 862 #endif
 863
 864 /* True if the targets integer-comparison functions return { 0, 1, 2
 865    } to indicate { <, ==, > }.  False if { -1, 0, 1 } is used
 866    instead.  The libgcc routines are biased.  */
 867 #ifndef TARGET_LIB_INT_CMP_BIASED
 868 #define TARGET_LIB_INT_CMP_BIASED (true)
 869 #endif
 870
 871 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
 872    then the word-endianness is the same as for integers.  */
 873 #ifndef FLOAT_WORDS_BIG_ENDIAN
 874 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 875 #endif
 876
 877 #ifdef TARGET_FLT_EVAL_METHOD
 878 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 1
 879 #else
 880 #define TARGET_FLT_EVAL_METHOD 0
 881 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 0
 882 #endif
 883
 884 #ifndef TARGET_DEC_EVAL_METHOD
 885 #define TARGET_DEC_EVAL_METHOD 2
 886 #endif
 887
 888 #ifndef HOT_TEXT_SECTION_NAME
 889 #define HOT_TEXT_SECTION_NAME ".text.hot"
 890 #endif
 891
 892 #ifndef UNLIKELY_EXECUTED_TEXT_SECTION_NAME
 893 #define UNLIKELY_EXECUTED_TEXT_SECTION_NAME ".text.unlikely"
 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 /* By default, only attempt to parallelize bitwise operations, and
 905    possibly adds/subtracts using bit-twiddling.  */
 906 #ifndef UNITS_PER_SIMD_WORD
 907 #define UNITS_PER_SIMD_WORD(MODE) UNITS_PER_WORD
 908 #endif
 909
 910 /* Determine whether __cxa_atexit, rather than atexit, is used to
 911    register C++ destructors for local statics and global objects.  */
 912 #ifndef DEFAULT_USE_CXA_ATEXIT
 913 #define DEFAULT_USE_CXA_ATEXIT 0
 914 #endif
 915
 916 /* If none of these macros are defined, the port must use the new
 917    technique of defining constraints in the machine description.
 918    tm_p.h will define those macros that machine-independent code
 919    still uses.  */
 920 #if  !defined CONSTRAINT_LEN                    \
 921   && !defined REG_CLASS_FROM_LETTER             \
 922   && !defined REG_CLASS_FROM_CONSTRAINT         \
 923   && !defined CONST_OK_FOR_LETTER_P             \
 924   && !defined CONST_OK_FOR_CONSTRAINT_P         \
 925   && !defined CONST_DOUBLE_OK_FOR_LETTER_P      \
 926   && !defined CONST_DOUBLE_OK_FOR_CONSTRAINT_P  \
 927   && !defined EXTRA_CONSTRAINT                  \
 928   && !defined EXTRA_CONSTRAINT_STR              \
 929   && !defined EXTRA_MEMORY_CONSTRAINT           \
 930   && !defined EXTRA_ADDRESS_CONSTRAINT
 931
 932 #define USE_MD_CONSTRAINTS
 933
 934 #if GCC_VERSION >= 3000 && defined IN_GCC
 935 /* These old constraint macros shouldn't appear anywhere in a
 936    configuration using MD constraint definitions.  */
 937 #pragma GCC poison REG_CLASS_FROM_LETTER CONST_OK_FOR_LETTER_P \
 938                    CONST_DOUBLE_OK_FOR_LETTER_P EXTRA_CONSTRAINT
 939 #endif
 940
 941 #else /* old constraint mechanism in use */
 942
 943 /* Determine whether extra constraint letter should be handled
 944    via address reload (like 'o').  */
 945 #ifndef EXTRA_MEMORY_CONSTRAINT
 946 #define EXTRA_MEMORY_CONSTRAINT(C,STR) 0
 947 #endif
 948
 949 /* Determine whether extra constraint letter should be handled
 950    as an address (like 'p').  */
 951 #ifndef EXTRA_ADDRESS_CONSTRAINT
 952 #define EXTRA_ADDRESS_CONSTRAINT(C,STR) 0
 953 #endif
 954
 955 /* When a port defines CONSTRAINT_LEN, it should use DEFAULT_CONSTRAINT_LEN
 956    for all the characters that it does not want to change, so things like the
 957   'length' of a digit in a matching constraint is an implementation detail,
 958    and not part of the interface.  */
 959 #define DEFAULT_CONSTRAINT_LEN(C,STR) 1
 960
 961 #ifndef CONSTRAINT_LEN
 962 #define CONSTRAINT_LEN(C,STR) DEFAULT_CONSTRAINT_LEN (C, STR)
 963 #endif
 964
 965 #if defined (CONST_OK_FOR_LETTER_P) && ! defined (CONST_OK_FOR_CONSTRAINT_P)
 966 #define CONST_OK_FOR_CONSTRAINT_P(VAL,C,STR) CONST_OK_FOR_LETTER_P (VAL, C)
 967 #endif
 968
 969 #if defined (CONST_DOUBLE_OK_FOR_LETTER_P) && ! defined (CONST_DOUBLE_OK_FOR_CONSTRAINT_P)
 970 #define CONST_DOUBLE_OK_FOR_CONSTRAINT_P(OP,C,STR) \
 971   CONST_DOUBLE_OK_FOR_LETTER_P (OP, C)
 972 #endif
 973
 974 #ifndef REG_CLASS_FROM_CONSTRAINT
 975 #define REG_CLASS_FROM_CONSTRAINT(C,STR) REG_CLASS_FROM_LETTER (C)
 976 #endif
 977
 978 #if defined (EXTRA_CONSTRAINT) && ! defined (EXTRA_CONSTRAINT_STR)
 979 #define EXTRA_CONSTRAINT_STR(OP, C,STR) EXTRA_CONSTRAINT (OP, C)
 980 #endif
 981
 982 #endif /* old constraint mechanism in use */
 983
 984 /* Determine whether the entire c99 runtime
 985    is present in the runtime library.  */
 986 #ifndef TARGET_C99_FUNCTIONS
 987 #define TARGET_C99_FUNCTIONS 0
 988 #endif
 989
 990 /* Determine whether the target runtime library has
 991    a sincos implementation following the GNU extension.  */
 992 #ifndef TARGET_HAS_SINCOS
 993 #define TARGET_HAS_SINCOS 0
 994 #endif
 995
 996 /* Indicate that CLZ and CTZ are undefined at zero.  */
 997 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
 998 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
 999 #endif
1000 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
1001 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
1002 #endif
1003
1004 /* Provide a default value for STORE_FLAG_VALUE.  */
1005 #ifndef STORE_FLAG_VALUE
1006 #define STORE_FLAG_VALUE  1
1007 #endif
1008
1009 /* This macro is used to determine what the largest unit size that
1010    move_by_pieces can use is.  */
1011
1012 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
1013    move efficiently, as opposed to  MOVE_MAX which is the maximum
1014    number of bytes we can move with a single instruction.  */
1015
1016 #ifndef MOVE_MAX_PIECES
1017 #define MOVE_MAX_PIECES   MOVE_MAX
1018 #endif
1019
1020 #ifndef STACK_POINTER_OFFSET
1021 #define STACK_POINTER_OFFSET    0
1022 #endif
1023
1024 #ifndef LOCAL_REGNO
1025 #define LOCAL_REGNO(REGNO)  0
1026 #endif
1027
1028 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1029    the stack pointer does not matter.  The value is tested only in
1030    functions that have frame pointers.  */
1031 #ifndef EXIT_IGNORE_STACK
1032 #define EXIT_IGNORE_STACK 0
1033 #endif
1034
1035 /* Assume that case vectors are not pc-relative.  */
1036 #ifndef CASE_VECTOR_PC_RELATIVE
1037 #define CASE_VECTOR_PC_RELATIVE 0
1038 #endif
1039
1040 /* Assume that trampolines need function alignment.  */
1041 #ifndef TRAMPOLINE_ALIGNMENT
1042 #define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY
1043 #endif
1044
1045 /* Register mappings for target machines without register windows.  */
1046 #ifndef INCOMING_REGNO
1047 #define INCOMING_REGNO(N) (N)
1048 #endif
1049
1050 #ifndef OUTGOING_REGNO
1051 #define OUTGOING_REGNO(N) (N)
1052 #endif
1053
1054 #ifndef SHIFT_COUNT_TRUNCATED
1055 #define SHIFT_COUNT_TRUNCATED 0
1056 #endif
1057
1058 #ifndef LEGITIMATE_PIC_OPERAND_P
1059 #define LEGITIMATE_PIC_OPERAND_P(X) 1
1060 #endif
1061
1062 #ifndef TARGET_MEM_CONSTRAINT
1063 #define TARGET_MEM_CONSTRAINT 'm'
1064 #endif
1065
1066 #ifndef REVERSIBLE_CC_MODE
1067 #define REVERSIBLE_CC_MODE(MODE) 0
1068 #endif
1069
1070 /* Biggest alignment supported by the object file format of this machine.  */
1071 #ifndef MAX_OFILE_ALIGNMENT
1072 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
1073 #endif
1074
1075 #ifndef FRAME_GROWS_DOWNWARD
1076 #define FRAME_GROWS_DOWNWARD 0
1077 #endif
1078
1079 /* On most machines, the CFA coincides with the first incoming parm.  */
1080 #ifndef ARG_POINTER_CFA_OFFSET
1081 #define ARG_POINTER_CFA_OFFSET(FNDECL) \
1082   (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
1083 #endif
1084
1085 /* On most machines, we use the CFA as DW_AT_frame_base.  */
1086 #ifndef CFA_FRAME_BASE_OFFSET
1087 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0
1088 #endif
1089
1090 /* The offset from the incoming value of %sp to the top of the stack frame
1091    for the current function.  */
1092 #ifndef INCOMING_FRAME_SP_OFFSET
1093 #define INCOMING_FRAME_SP_OFFSET 0
1094 #endif
1095
1096 #ifndef HARD_REGNO_NREGS_HAS_PADDING
1097 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
1098 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
1099 #endif
1100
1101 #ifndef OUTGOING_REG_PARM_STACK_SPACE
1102 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
1103 #endif
1104
1105 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
1106    the backend.  MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
1107    effort stack alignment supported by the backend.  If the backend
1108    supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
1109    MAX_STACK_ALIGNMENT are the same.  Otherwise, the incoming stack
1110    boundary will limit the maximum guaranteed stack alignment.  */
1111 #ifdef MAX_STACK_ALIGNMENT
1112 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
1113 #else
1114 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY
1115 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
1116 #endif
1117
1118 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
1119
1120 #ifndef LOCAL_ALIGNMENT
1121 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
1122 #endif
1123
1124 #ifndef STACK_SLOT_ALIGNMENT
1125 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
1126   ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
1127 #endif
1128
1129 #ifndef LOCAL_DECL_ALIGNMENT
1130 #define LOCAL_DECL_ALIGNMENT(DECL) \
1131   LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
1132 #endif
1133
1134 #ifndef MINIMUM_ALIGNMENT
1135 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN)
1136 #endif
1137
1138 /* Alignment value for attribute ((aligned)).  */
1139 #ifndef ATTRIBUTE_ALIGNED_VALUE
1140 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
1141 #endif
1142
1143 /* Many ports have no mode-dependent addresses (except possibly autoincrement
1144    and autodecrement addresses, which are handled by target-independent code
1145    in recog.c).  */
1146 #ifndef GO_IF_MODE_DEPENDENT_ADDRESS
1147 #define GO_IF_MODE_DEPENDENT_ADDRESS(X, WIN)
1148 #endif
1149
1150 /* For most ports anything that evaluates to a constant symbolic
1151    or integer value is acceptable as a constant address.  */
1152 #ifndef CONSTANT_ADDRESS_P
1153 #define CONSTANT_ADDRESS_P(X)   (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE)
1154 #endif
1155
1156 #ifndef MAX_FIXED_MODE_SIZE
1157 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
1158 #endif
1159
1160 /* Nonzero if structures and unions should be returned in memory.
1161
1162    This should only be defined if compatibility with another compiler or
1163    with an ABI is needed, because it results in slower code.  */
1164
1165 #ifndef DEFAULT_PCC_STRUCT_RETURN
1166 #define DEFAULT_PCC_STRUCT_RETURN 1
1167 #endif
1168
1169 #ifdef GCC_INSN_FLAGS_H
1170 /* Dependent default target macro definitions
1171
1172    This section of defaults.h defines target macros that depend on generated
1173    headers.  This is a bit awkward:  We want to put all default definitions
1174    for target macros in defaults.h, but some of the defaults depend on the
1175    HAVE_* flags defines of insn-flags.h.  But insn-flags.h is not always
1176    included by files that do include defaults.h.
1177
1178    Fortunately, the default macro definitions that depend on the HAVE_*
1179    macros are also the ones that will only be used inside GCC itself, i.e.
1180    not in the gen* programs or in target objects like libgcc.
1181
1182    Obviously, it would be best to keep this section of defaults.h as small
1183    as possible, by converting the macros defined below to target hooks or
1184    functions.
1185 */
1186
1187 /* Just because the user configured --with-sjlj-exceptions=no doesn't
1188    mean that we can use call frame exceptions.  Detect that the target
1189    has appropriate support.  */
1190
1191 #ifndef MUST_USE_SJLJ_EXCEPTIONS
1192 # if defined (EH_RETURN_DATA_REGNO)                     \
1193        && (defined (TARGET_UNWIND_INFO)                 \
1194            || (DWARF2_UNWIND_INFO                       \
1195                && (defined (EH_RETURN_HANDLER_RTX)      \
1196                    || defined (HAVE_eh_return))))
1197 #  define MUST_USE_SJLJ_EXCEPTIONS      0
1198 # else
1199 #  define MUST_USE_SJLJ_EXCEPTIONS      1
1200 # endif
1201 #endif
1202
1203 #ifdef CONFIG_SJLJ_EXCEPTIONS
1204 # if CONFIG_SJLJ_EXCEPTIONS == 1
1205 #  define USING_SJLJ_EXCEPTIONS         1
1206 # endif
1207 # if CONFIG_SJLJ_EXCEPTIONS == 0
1208 #  define USING_SJLJ_EXCEPTIONS         0
1209 #  if !defined(EH_RETURN_DATA_REGNO)
1210     #error "EH_RETURN_DATA_REGNO required"
1211 #  endif
1212 #  if ! (defined(TARGET_UNWIND_INFO) || DWARF2_UNWIND_INFO)
1213     #error "{DWARF2,TARGET}_UNWIND_INFO required"
1214 #  endif
1215 #  if !defined(TARGET_UNWIND_INFO) \
1216         && !(defined(EH_RETURN_HANDLER_RTX) || defined(HAVE_eh_return))
1217     #error "EH_RETURN_HANDLER_RTX or eh_return required"
1218 #  endif
1219 /* Usually the above error checks will have already triggered an
1220    error, but backends may set MUST_USE_SJLJ_EXCEPTIONS for their own
1221    reasons.  */
1222 #  if MUST_USE_SJLJ_EXCEPTIONS
1223     #error "Must use SJLJ exceptions but configured not to"
1224 #  endif
1225 # endif
1226 #else
1227 # define USING_SJLJ_EXCEPTIONS          MUST_USE_SJLJ_EXCEPTIONS
1228 #endif
1229
1230 /* The default branch cost is 1.  */
1231 #ifndef BRANCH_COST
1232 #define BRANCH_COST(speed_p, predictable_p) 1
1233 #endif
1234
1235 /* If a memory-to-memory move would take MOVE_RATIO or more simple
1236    move-instruction sequences, we will do a movmem or libcall instead.  */
1237
1238 #ifndef MOVE_RATIO
1239 #if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti)
1240 #define MOVE_RATIO(speed) 2
1241 #else
1242 /* If we are optimizing for space (-Os), cut down the default move ratio.  */
1243 #define MOVE_RATIO(speed) ((speed) ? 15 : 3)
1244 #endif
1245 #endif
1246
1247 /* If a clear memory operation would take CLEAR_RATIO or more simple
1248    move-instruction sequences, we will do a setmem or libcall instead.  */
1249
1250 #ifndef CLEAR_RATIO
1251 #if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
1252 #define CLEAR_RATIO(speed) 2
1253 #else
1254 /* If we are optimizing for space, cut down the default clear ratio.  */
1255 #define CLEAR_RATIO(speed) ((speed) ? 15 :3)
1256 #endif
1257 #endif
1258
1259 /* If a memory set (to value other than zero) operation would take
1260    SET_RATIO or more simple move-instruction sequences, we will do a movmem
1261    or libcall instead.  */
1262 #ifndef SET_RATIO
1263 #define SET_RATIO(speed) MOVE_RATIO(speed)
1264 #endif
1265
1266 /* Supply a default definition for FUNCTION_ARG_PADDING:
1267    usually pad upward, but pad short args downward on
1268    big-endian machines.  */
1269
1270 #define DEFAULT_FUNCTION_ARG_PADDING(MODE, TYPE)                        \
1271   (! BYTES_BIG_ENDIAN                                                   \
1272    ? upward                                                             \
1273    : (((MODE) == BLKmode                                                \
1274        ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST         \
1275           && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \
1276        : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY)                       \
1277       ? downward : upward))
1278
1279 #ifndef FUNCTION_ARG_PADDING
1280 #define FUNCTION_ARG_PADDING(MODE, TYPE)        \
1281   DEFAULT_FUNCTION_ARG_PADDING ((MODE), (TYPE))
1282 #endif
1283
1284 /* Supply a default definition for FUNCTION_ARG_BOUNDARY.  Normally, we let
1285    FUNCTION_ARG_PADDING, which also pads the length, handle any needed
1286    alignment.  */
1287
1288 #ifndef FUNCTION_ARG_BOUNDARY
1289 #define FUNCTION_ARG_BOUNDARY(MODE, TYPE)       PARM_BOUNDARY
1290 #endif
1291
1292 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
1293    Normally move_insn, so Pmode stack pointer.  */
1294
1295 #ifndef STACK_SAVEAREA_MODE
1296 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
1297 #endif
1298
1299 /* Supply a default definition of STACK_SIZE_MODE for
1300    allocate_dynamic_stack_space.  Normally PLUS/MINUS, so word_mode.  */
1301
1302 #ifndef STACK_SIZE_MODE
1303 #define STACK_SIZE_MODE word_mode
1304 #endif
1305
1306 /* Provide default values for the macros controlling stack checking.  */
1307
1308 /* The default is neither full builtin stack checking...  */
1309 #ifndef STACK_CHECK_BUILTIN
1310 #define STACK_CHECK_BUILTIN 0
1311 #endif
1312
1313 /* ...nor static builtin stack checking.  */
1314 #ifndef STACK_CHECK_STATIC_BUILTIN
1315 #define STACK_CHECK_STATIC_BUILTIN 0
1316 #endif
1317
1318 /* The default interval is one page (4096 bytes).  */
1319 #ifndef STACK_CHECK_PROBE_INTERVAL_EXP
1320 #define STACK_CHECK_PROBE_INTERVAL_EXP 12
1321 #endif
1322
1323 /* The default is not to move the stack pointer.  */
1324 #ifndef STACK_CHECK_MOVING_SP
1325 #define STACK_CHECK_MOVING_SP 0
1326 #endif
1327
1328 /* This is a kludge to try to capture the discrepancy between the old
1329    mechanism (generic stack checking) and the new mechanism (static
1330    builtin stack checking).  STACK_CHECK_PROTECT needs to be bumped
1331    for the latter because part of the protection area is effectively
1332    included in STACK_CHECK_MAX_FRAME_SIZE for the former.  */
1333 #ifdef STACK_CHECK_PROTECT
1334 #define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
1335 #else
1336 #define STACK_OLD_CHECK_PROTECT \
1337  (USING_SJLJ_EXCEPTIONS ? 75 * UNITS_PER_WORD : 8 * 1024)
1338 #endif
1339
1340 /* Minimum amount of stack required to recover from an anticipated stack
1341    overflow detection.  The default value conveys an estimate of the amount
1342    of stack required to propagate an exception.  */
1343 #ifndef STACK_CHECK_PROTECT
1344 #define STACK_CHECK_PROTECT \
1345  (USING_SJLJ_EXCEPTIONS ? 75 * UNITS_PER_WORD : 12 * 1024)
1346 #endif
1347
1348 /* Make the maximum frame size be the largest we can and still only need
1349    one probe per function.  */
1350 #ifndef STACK_CHECK_MAX_FRAME_SIZE
1351 #define STACK_CHECK_MAX_FRAME_SIZE \
1352   ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD)
1353 #endif
1354
1355 /* This is arbitrary, but should be large enough everywhere.  */
1356 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
1357 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
1358 #endif
1359
1360 /* Provide a reasonable default for the maximum size of an object to
1361    allocate in the fixed frame.  We may need to be able to make this
1362    controllable by the user at some point.  */
1363 #ifndef STACK_CHECK_MAX_VAR_SIZE
1364 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
1365 #endif
1366
1367 #endif /* GCC_INSN_FLAGS_H  */
1368
1369 #endif  /* ! GCC_DEFAULTS_H */