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 variable NAME.  */
 137
 138 #ifndef ASM_OUTPUT_LABEL
 139 #define ASM_OUTPUT_LABEL(FILE,NAME) \
 140   do { assemble_name ((FILE), (NAME)); fputs (":\n", (FILE)); } while (0)
 141 #endif
 142
 143 /* This is how to output the definition of a user-level label named
 144    NAME, such as the label on a function.  */
 145
 146 #ifndef ASM_OUTPUT_FUNCTION_LABEL
 147 #define ASM_OUTPUT_FUNCTION_LABEL(FILE, NAME, DECL) \
 148   ASM_OUTPUT_LABEL ((FILE), (NAME))
 149 #endif
 150
 151 /* Output the definition of a compiler-generated label named NAME.  */
 152 #ifndef ASM_OUTPUT_INTERNAL_LABEL
 153 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,NAME)    \
 154   do {                                          \
 155     assemble_name_raw ((FILE), (NAME));         \
 156     fputs (":\n", (FILE));                      \
 157   } while (0)
 158 #endif
 159
 160 /* This is how to output a reference to a user-level label named NAME.  */
 161
 162 #ifndef ASM_OUTPUT_LABELREF
 163 #define ASM_OUTPUT_LABELREF(FILE,NAME)  asm_fprintf ((FILE), "%U%s", (NAME))
 164 #endif
 165
 166 /* Allow target to print debug info labels specially.  This is useful for
 167    VLIW targets, since debug info labels should go into the middle of
 168    instruction bundles instead of breaking them.  */
 169
 170 #ifndef ASM_OUTPUT_DEBUG_LABEL
 171 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
 172   (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM)
 173 #endif
 174
 175 /* This is how we tell the assembler that a symbol is weak.  */
 176 #ifndef ASM_OUTPUT_WEAK_ALIAS
 177 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
 178 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE)      \
 179   do                                                    \
 180     {                                                   \
 181       ASM_WEAKEN_LABEL (STREAM, NAME);                  \
 182       if (VALUE)                                        \
 183         ASM_OUTPUT_DEF (STREAM, NAME, VALUE);           \
 184     }                                                   \
 185   while (0)
 186 #endif
 187 #endif
 188
 189 /* This is how we tell the assembler that a symbol is a weak alias to
 190    another symbol that doesn't require the other symbol to be defined.
 191    Uses of the former will turn into weak uses of the latter, i.e.,
 192    uses that, in case the latter is undefined, will not cause errors,
 193    and will add it to the symbol table as weak undefined.  However, if
 194    the latter is referenced directly, a strong reference prevails.  */
 195 #ifndef ASM_OUTPUT_WEAKREF
 196 #if defined HAVE_GAS_WEAKREF
 197 #define ASM_OUTPUT_WEAKREF(FILE, DECL, NAME, VALUE)                     \
 198   do                                                                    \
 199     {                                                                   \
 200       fprintf ((FILE), "\t.weakref\t");                                 \
 201       assemble_name ((FILE), (NAME));                                   \
 202       fprintf ((FILE), ",");                                            \
 203       assemble_name ((FILE), (VALUE));                                  \
 204       fprintf ((FILE), "\n");                                           \
 205     }                                                                   \
 206   while (0)
 207 #endif
 208 #endif
 209
 210 /* How to emit a .type directive.  */
 211 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE
 212 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT
 213 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE)   \
 214   do                                                    \
 215     {                                                   \
 216       fputs (TYPE_ASM_OP, STREAM);                      \
 217       assemble_name (STREAM, NAME);                     \
 218       fputs (", ", STREAM);                             \
 219       fprintf (STREAM, TYPE_OPERAND_FMT, TYPE);         \
 220       putc ('\n', STREAM);                              \
 221     }                                                   \
 222   while (0)
 223 #endif
 224 #endif
 225
 226 /* How to emit a .size directive.  */
 227 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE
 228 #ifdef SIZE_ASM_OP
 229 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE)   \
 230   do                                                    \
 231     {                                                   \
 232       HOST_WIDE_INT size_ = (SIZE);                     \
 233       fputs (SIZE_ASM_OP, STREAM);                      \
 234       assemble_name (STREAM, NAME);                     \
 235       fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \
 236     }                                                   \
 237   while (0)
 238
 239 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME)          \
 240   do                                                    \
 241     {                                                   \
 242       fputs (SIZE_ASM_OP, STREAM);                      \
 243       assemble_name (STREAM, NAME);                     \
 244       fputs (", .-", STREAM);                           \
 245       assemble_name (STREAM, NAME);                     \
 246       putc ('\n', STREAM);                              \
 247     }                                                   \
 248   while (0)
 249
 250 #endif
 251 #endif
 252
 253 /* This determines whether or not we support weak symbols.  */
 254 #ifndef SUPPORTS_WEAK
 255 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
 256 #define SUPPORTS_WEAK 1
 257 #else
 258 #define SUPPORTS_WEAK 0
 259 #endif
 260 #endif
 261
 262 /* This determines whether or not we support the discriminator
 263    attribute in the .loc directive.  */
 264 #ifndef SUPPORTS_DISCRIMINATOR
 265 #ifdef HAVE_GAS_DISCRIMINATOR
 266 #define SUPPORTS_DISCRIMINATOR 1
 267 #else
 268 #define SUPPORTS_DISCRIMINATOR 0
 269 #endif
 270 #endif
 271
 272 /* This determines whether or not we support link-once semantics.  */
 273 #ifndef SUPPORTS_ONE_ONLY
 274 #ifdef MAKE_DECL_ONE_ONLY
 275 #define SUPPORTS_ONE_ONLY 1
 276 #else
 277 #define SUPPORTS_ONE_ONLY 0
 278 #endif
 279 #endif
 280
 281 /* This determines whether weak symbols must be left out of a static
 282    archive's table of contents.  Defining this macro to be nonzero has
 283    the consequence that certain symbols will not be made weak that
 284    otherwise would be.  The C++ ABI requires this macro to be zero;
 285    see the documentation.  */
 286 #ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 287 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
 288 #endif
 289
 290 /* This determines whether or not we need linkonce unwind information.  */
 291 #ifndef TARGET_USES_WEAK_UNWIND_INFO
 292 #define TARGET_USES_WEAK_UNWIND_INFO 0
 293 #endif
 294
 295 /* By default, there is no prefix on user-defined symbols.  */
 296 #ifndef USER_LABEL_PREFIX
 297 #define USER_LABEL_PREFIX ""
 298 #endif
 299
 300 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
 301    provide a weak attribute.  Else define it to nothing.
 302
 303    This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
 304    not available at that time.
 305
 306    Note, this is only for use by target files which we know are to be
 307    compiled by GCC.  */
 308 #ifndef TARGET_ATTRIBUTE_WEAK
 309 # if SUPPORTS_WEAK
 310 #  define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
 311 # else
 312 #  define TARGET_ATTRIBUTE_WEAK
 313 # endif
 314 #endif
 315
 316 /* Determines whether we may use common symbols to represent one-only
 317    semantics (a.k.a. "vague linkage").  */
 318 #ifndef USE_COMMON_FOR_ONE_ONLY
 319 # define USE_COMMON_FOR_ONE_ONLY 1
 320 #endif
 321
 322 /* By default we can assume that all global symbols are in one namespace,
 323    across all shared libraries.  */
 324 #ifndef MULTIPLE_SYMBOL_SPACES
 325 # define MULTIPLE_SYMBOL_SPACES 0
 326 #endif
 327
 328 /* If the target supports init_priority C++ attribute, give
 329    SUPPORTS_INIT_PRIORITY a nonzero value.  */
 330 #ifndef SUPPORTS_INIT_PRIORITY
 331 #define SUPPORTS_INIT_PRIORITY 1
 332 #endif /* SUPPORTS_INIT_PRIORITY */
 333
 334 /* If duplicate library search directories can be removed from a
 335    linker command without changing the linker's semantics, give this
 336    symbol a nonzero.  */
 337 #ifndef LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
 338 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 0
 339 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
 340
 341 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
 342    the rest of the DWARF 2 frame unwind support is also provided.  */
 343 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX) \
 344     && !defined (TARGET_UNWIND_INFO)
 345 #define DWARF2_UNWIND_INFO 1
 346 #endif
 347
 348 /* If we have named sections, and we're using crtstuff to run ctors,
 349    use them for registering eh frame information.  */
 350 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
 351     && !defined(EH_FRAME_IN_DATA_SECTION)
 352 #ifndef EH_FRAME_SECTION_NAME
 353 #define EH_FRAME_SECTION_NAME ".eh_frame"
 354 #endif
 355 #endif
 356
 357 /* On many systems, different EH table encodings are used under
 358    difference circumstances.  Some will require runtime relocations;
 359    some will not.  For those that do not require runtime relocations,
 360    we would like to make the table read-only.  However, since the
 361    read-only tables may need to be combined with read-write tables
 362    that do require runtime relocation, it is not safe to make the
 363    tables read-only unless the linker will merge read-only and
 364    read-write sections into a single read-write section.  If your
 365    linker does not have this ability, but your system is such that no
 366    encoding used with non-PIC code will ever require a runtime
 367    relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in
 368    your target configuration file.  */
 369 #ifndef EH_TABLES_CAN_BE_READ_ONLY
 370 #ifdef HAVE_LD_RO_RW_SECTION_MIXING
 371 #define EH_TABLES_CAN_BE_READ_ONLY 1
 372 #else
 373 #define EH_TABLES_CAN_BE_READ_ONLY 0
 374 #endif
 375 #endif
 376
 377 /* If we have named section and we support weak symbols, then use the
 378    .jcr section for recording java classes which need to be registered
 379    at program start-up time.  */
 380 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
 381 #ifndef JCR_SECTION_NAME
 382 #define JCR_SECTION_NAME ".jcr"
 383 #endif
 384 #endif
 385
 386 /* This decision to use a .jcr section can be overridden by defining
 387    USE_JCR_SECTION to 0 in target file.  This is necessary if target
 388    can define JCR_SECTION_NAME but does not have crtstuff or
 389    linker support for .jcr section.  */
 390 #ifndef TARGET_USE_JCR_SECTION
 391 #ifdef JCR_SECTION_NAME
 392 #define TARGET_USE_JCR_SECTION 1
 393 #else
 394 #define TARGET_USE_JCR_SECTION 0
 395 #endif
 396 #endif
 397
 398 /* Number of hardware registers that go into the DWARF-2 unwind info.
 399    If not defined, equals FIRST_PSEUDO_REGISTER  */
 400
 401 #ifndef DWARF_FRAME_REGISTERS
 402 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
 403 #endif
 404
 405 /* How to renumber registers for dbx and gdb.  If not defined, assume
 406    no renumbering is necessary.  */
 407
 408 #ifndef DBX_REGISTER_NUMBER
 409 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 410 #endif
 411
 412 /* Default sizes for base C types.  If the sizes are different for
 413    your target, you should override these values by defining the
 414    appropriate symbols in your tm.h file.  */
 415
 416 #ifndef BITS_PER_UNIT
 417 #define BITS_PER_UNIT 8
 418 #endif
 419
 420 #ifndef BITS_PER_WORD
 421 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
 422 #endif
 423
 424 #ifndef CHAR_TYPE_SIZE
 425 #define CHAR_TYPE_SIZE BITS_PER_UNIT
 426 #endif
 427
 428 #ifndef BOOL_TYPE_SIZE
 429 /* `bool' has size and alignment `1', on almost all platforms.  */
 430 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
 431 #endif
 432
 433 #ifndef SHORT_TYPE_SIZE
 434 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
 435 #endif
 436
 437 #ifndef INT_TYPE_SIZE
 438 #define INT_TYPE_SIZE BITS_PER_WORD
 439 #endif
 440
 441 #ifndef LONG_TYPE_SIZE
 442 #define LONG_TYPE_SIZE BITS_PER_WORD
 443 #endif
 444
 445 #ifndef LONG_LONG_TYPE_SIZE
 446 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
 447 #endif
 448
 449 #ifndef WCHAR_TYPE_SIZE
 450 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
 451 #endif
 452
 453 #ifndef FLOAT_TYPE_SIZE
 454 #define FLOAT_TYPE_SIZE BITS_PER_WORD
 455 #endif
 456
 457 #ifndef DOUBLE_TYPE_SIZE
 458 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 459 #endif
 460
 461 #ifndef LONG_DOUBLE_TYPE_SIZE
 462 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 463 #endif
 464
 465 #ifndef DECIMAL32_TYPE_SIZE
 466 #define DECIMAL32_TYPE_SIZE 32
 467 #endif
 468
 469 #ifndef DECIMAL64_TYPE_SIZE
 470 #define DECIMAL64_TYPE_SIZE 64
 471 #endif
 472
 473 #ifndef DECIMAL128_TYPE_SIZE
 474 #define DECIMAL128_TYPE_SIZE 128
 475 #endif
 476
 477 #ifndef SHORT_FRACT_TYPE_SIZE
 478 #define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT
 479 #endif
 480
 481 #ifndef FRACT_TYPE_SIZE
 482 #define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2)
 483 #endif
 484
 485 #ifndef LONG_FRACT_TYPE_SIZE
 486 #define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4)
 487 #endif
 488
 489 #ifndef LONG_LONG_FRACT_TYPE_SIZE
 490 #define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8)
 491 #endif
 492
 493 #ifndef SHORT_ACCUM_TYPE_SIZE
 494 #define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2)
 495 #endif
 496
 497 #ifndef ACCUM_TYPE_SIZE
 498 #define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2)
 499 #endif
 500
 501 #ifndef LONG_ACCUM_TYPE_SIZE
 502 #define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2)
 503 #endif
 504
 505 #ifndef LONG_LONG_ACCUM_TYPE_SIZE
 506 #define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2)
 507 #endif
 508
 509 /* We let tm.h override the types used here, to handle trivial differences
 510    such as the choice of unsigned int or long unsigned int for size_t.
 511    When machines start needing nontrivial differences in the size type,
 512    it would be best to do something here to figure out automatically
 513    from other information what type to use.  */
 514
 515 #ifndef SIZE_TYPE
 516 #define SIZE_TYPE "long unsigned int"
 517 #endif
 518
 519 #ifndef PID_TYPE
 520 #define PID_TYPE "int"
 521 #endif
 522
 523 /* If GCC knows the exact uint_least16_t and uint_least32_t types from
 524    <stdint.h>, use them for char16_t and char32_t.  Otherwise, use
 525    these guesses; getting the wrong type of a given width will not
 526    affect C++ name mangling because in C++ these are distinct types
 527    not typedefs.  */
 528
 529 #ifdef UINT_LEAST16_TYPE
 530 #define CHAR16_TYPE UINT_LEAST16_TYPE
 531 #else
 532 #define CHAR16_TYPE "short unsigned int"
 533 #endif
 534
 535 #ifdef UINT_LEAST32_TYPE
 536 #define CHAR32_TYPE UINT_LEAST32_TYPE
 537 #else
 538 #define CHAR32_TYPE "unsigned int"
 539 #endif
 540
 541 #ifndef WCHAR_TYPE
 542 #define WCHAR_TYPE "int"
 543 #endif
 544
 545 /* WCHAR_TYPE gets overridden by -fshort-wchar.  */
 546 #define MODIFIED_WCHAR_TYPE \
 547         (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE)
 548
 549 #ifndef PTRDIFF_TYPE
 550 #define PTRDIFF_TYPE "long int"
 551 #endif
 552
 553 #ifndef WINT_TYPE
 554 #define WINT_TYPE "unsigned int"
 555 #endif
 556
 557 #ifndef INTMAX_TYPE
 558 #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)     \
 559                      ? "int"                                    \
 560                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 561                         ? "long int"                            \
 562                         : "long long int"))
 563 #endif
 564
 565 #ifndef UINTMAX_TYPE
 566 #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)    \
 567                      ? "unsigned int"                           \
 568                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 569                         ? "long unsigned int"                   \
 570                         : "long long unsigned int"))
 571 #endif
 572
 573
 574 /* There are no default definitions of these <stdint.h> types.  */
 575
 576 #ifndef SIG_ATOMIC_TYPE
 577 #define SIG_ATOMIC_TYPE ((const char *) NULL)
 578 #endif
 579
 580 #ifndef INT8_TYPE
 581 #define INT8_TYPE ((const char *) NULL)
 582 #endif
 583
 584 #ifndef INT16_TYPE
 585 #define INT16_TYPE ((const char *) NULL)
 586 #endif
 587
 588 #ifndef INT32_TYPE
 589 #define INT32_TYPE ((const char *) NULL)
 590 #endif
 591
 592 #ifndef INT64_TYPE
 593 #define INT64_TYPE ((const char *) NULL)
 594 #endif
 595
 596 #ifndef UINT8_TYPE
 597 #define UINT8_TYPE ((const char *) NULL)
 598 #endif
 599
 600 #ifndef UINT16_TYPE
 601 #define UINT16_TYPE ((const char *) NULL)
 602 #endif
 603
 604 #ifndef UINT32_TYPE
 605 #define UINT32_TYPE ((const char *) NULL)
 606 #endif
 607
 608 #ifndef UINT64_TYPE
 609 #define UINT64_TYPE ((const char *) NULL)
 610 #endif
 611
 612 #ifndef INT_LEAST8_TYPE
 613 #define INT_LEAST8_TYPE ((const char *) NULL)
 614 #endif
 615
 616 #ifndef INT_LEAST16_TYPE
 617 #define INT_LEAST16_TYPE ((const char *) NULL)
 618 #endif
 619
 620 #ifndef INT_LEAST32_TYPE
 621 #define INT_LEAST32_TYPE ((const char *) NULL)
 622 #endif
 623
 624 #ifndef INT_LEAST64_TYPE
 625 #define INT_LEAST64_TYPE ((const char *) NULL)
 626 #endif
 627
 628 #ifndef UINT_LEAST8_TYPE
 629 #define UINT_LEAST8_TYPE ((const char *) NULL)
 630 #endif
 631
 632 #ifndef UINT_LEAST16_TYPE
 633 #define UINT_LEAST16_TYPE ((const char *) NULL)
 634 #endif
 635
 636 #ifndef UINT_LEAST32_TYPE
 637 #define UINT_LEAST32_TYPE ((const char *) NULL)
 638 #endif
 639
 640 #ifndef UINT_LEAST64_TYPE
 641 #define UINT_LEAST64_TYPE ((const char *) NULL)
 642 #endif
 643
 644 #ifndef INT_FAST8_TYPE
 645 #define INT_FAST8_TYPE ((const char *) NULL)
 646 #endif
 647
 648 #ifndef INT_FAST16_TYPE
 649 #define INT_FAST16_TYPE ((const char *) NULL)
 650 #endif
 651
 652 #ifndef INT_FAST32_TYPE
 653 #define INT_FAST32_TYPE ((const char *) NULL)
 654 #endif
 655
 656 #ifndef INT_FAST64_TYPE
 657 #define INT_FAST64_TYPE ((const char *) NULL)
 658 #endif
 659
 660 #ifndef UINT_FAST8_TYPE
 661 #define UINT_FAST8_TYPE ((const char *) NULL)
 662 #endif
 663
 664 #ifndef UINT_FAST16_TYPE
 665 #define UINT_FAST16_TYPE ((const char *) NULL)
 666 #endif
 667
 668 #ifndef UINT_FAST32_TYPE
 669 #define UINT_FAST32_TYPE ((const char *) NULL)
 670 #endif
 671
 672 #ifndef UINT_FAST64_TYPE
 673 #define UINT_FAST64_TYPE ((const char *) NULL)
 674 #endif
 675
 676 #ifndef INTPTR_TYPE
 677 #define INTPTR_TYPE ((const char *) NULL)
 678 #endif
 679
 680 #ifndef UINTPTR_TYPE
 681 #define UINTPTR_TYPE ((const char *) NULL)
 682 #endif
 683
 684 /* Width in bits of a pointer.  Mind the value of the macro `Pmode'.  */
 685 #ifndef POINTER_SIZE
 686 #define POINTER_SIZE BITS_PER_WORD
 687 #endif
 688
 689 #ifndef PIC_OFFSET_TABLE_REGNUM
 690 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
 691 #endif
 692
 693 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
 694 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
 695 #endif
 696
 697 #ifndef TARGET_DECLSPEC
 698 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
 699 /* If the target supports the "dllimport" attribute, users are
 700    probably used to the "__declspec" syntax.  */
 701 #define TARGET_DECLSPEC 1
 702 #else
 703 #define TARGET_DECLSPEC 0
 704 #endif
 705 #endif
 706
 707 /* By default, the preprocessor should be invoked the same way in C++
 708    as in C.  */
 709 #ifndef CPLUSPLUS_CPP_SPEC
 710 #ifdef CPP_SPEC
 711 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
 712 #endif
 713 #endif
 714
 715 #ifndef ACCUMULATE_OUTGOING_ARGS
 716 #define ACCUMULATE_OUTGOING_ARGS 0
 717 #endif
 718
 719 /* Supply a default definition for PUSH_ARGS.  */
 720 #ifndef PUSH_ARGS
 721 #ifdef PUSH_ROUNDING
 722 #define PUSH_ARGS       !ACCUMULATE_OUTGOING_ARGS
 723 #else
 724 #define PUSH_ARGS       0
 725 #endif
 726 #endif
 727
 728 /* Decide whether a function's arguments should be processed
 729    from first to last or from last to first.
 730
 731    They should if the stack and args grow in opposite directions, but
 732    only if we have push insns.  */
 733
 734 #ifdef PUSH_ROUNDING
 735
 736 #ifndef PUSH_ARGS_REVERSED
 737 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
 738 #define PUSH_ARGS_REVERSED  PUSH_ARGS
 739 #endif
 740 #endif
 741
 742 #endif
 743
 744 #ifndef PUSH_ARGS_REVERSED
 745 #define PUSH_ARGS_REVERSED 0
 746 #endif
 747
 748 /* Default value for the alignment (in bits) a C conformant malloc has to
 749    provide. This default is intended to be safe and always correct.  */
 750 #ifndef MALLOC_ABI_ALIGNMENT
 751 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
 752 #endif
 753
 754 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
 755    STACK_BOUNDARY is required.  */
 756 #ifndef PREFERRED_STACK_BOUNDARY
 757 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
 758 #endif
 759
 760 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not
 761    defined.  */
 762 #ifndef INCOMING_STACK_BOUNDARY
 763 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY
 764 #endif
 765
 766 #ifndef TARGET_DEFAULT_PACK_STRUCT
 767 #define TARGET_DEFAULT_PACK_STRUCT 0
 768 #endif
 769
 770 /* By default, the C++ compiler will use function addresses in the
 771    vtable entries.  Setting this nonzero tells the compiler to use
 772    function descriptors instead.  The value of this macro says how
 773    many words wide the descriptor is (normally 2).  It is assumed
 774    that the address of a function descriptor may be treated as a
 775    pointer to a function.  */
 776 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
 777 #define TARGET_VTABLE_USES_DESCRIPTORS 0
 778 #endif
 779
 780 /* By default, the vtable entries are void pointers, the so the alignment
 781    is the same as pointer alignment.  The value of this macro specifies
 782    the alignment of the vtable entry in bits.  It should be defined only
 783    when special alignment is necessary.  */
 784 #ifndef TARGET_VTABLE_ENTRY_ALIGN
 785 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
 786 #endif
 787
 788 /* There are a few non-descriptor entries in the vtable at offsets below
 789    zero.  If these entries must be padded (say, to preserve the alignment
 790    specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
 791    words in each data entry.  */
 792 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
 793 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
 794 #endif
 795
 796 /* Decide whether it is safe to use a local alias for a virtual function
 797    when constructing thunks.  */
 798 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
 799 #ifdef ASM_OUTPUT_DEF
 800 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
 801 #else
 802 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
 803 #endif
 804 #endif
 805
 806 /* Select a format to encode pointers in exception handling data.  We
 807    prefer those that result in fewer dynamic relocations.  Assume no
 808    special support here and encode direct references.  */
 809 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
 810 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  DW_EH_PE_absptr
 811 #endif
 812
 813 /* By default, the C++ compiler will use the lowest bit of the pointer
 814    to function to indicate a pointer-to-member-function points to a
 815    virtual member function.  However, if FUNCTION_BOUNDARY indicates
 816    function addresses aren't always even, the lowest bit of the delta
 817    field will be used.  */
 818 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
 819 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
 820   (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
 821    ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
 822 #endif
 823
 824 #ifndef DEFAULT_GDB_EXTENSIONS
 825 #define DEFAULT_GDB_EXTENSIONS 1
 826 #endif
 827
 828 /* If more than one debugging type is supported, you must define
 829    PREFERRED_DEBUGGING_TYPE to choose the default.  */
 830
 831 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
 832          + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
 833          + defined (VMS_DEBUGGING_INFO))
 834 #ifndef PREFERRED_DEBUGGING_TYPE
 835 #error You must define PREFERRED_DEBUGGING_TYPE
 836 #endif /* no PREFERRED_DEBUGGING_TYPE */
 837
 838 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
 839    here so other code needn't care.  */
 840 #elif defined DBX_DEBUGGING_INFO
 841 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 842
 843 #elif defined SDB_DEBUGGING_INFO
 844 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
 845
 846 #elif defined DWARF2_DEBUGGING_INFO
 847 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 848
 849 #elif defined VMS_DEBUGGING_INFO
 850 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
 851
 852 #elif defined XCOFF_DEBUGGING_INFO
 853 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
 854
 855 #else
 856 /* No debugging format is supported by this target.  */
 857 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
 858 #endif
 859
 860 #ifndef LARGEST_EXPONENT_IS_NORMAL
 861 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
 862 #endif
 863
 864 #ifndef ROUND_TOWARDS_ZERO
 865 #define ROUND_TOWARDS_ZERO 0
 866 #endif
 867
 868 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
 869 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
 870 #endif
 871
 872 /* True if the targets integer-comparison functions return { 0, 1, 2
 873    } to indicate { <, ==, > }.  False if { -1, 0, 1 } is used
 874    instead.  The libgcc routines are biased.  */
 875 #ifndef TARGET_LIB_INT_CMP_BIASED
 876 #define TARGET_LIB_INT_CMP_BIASED (true)
 877 #endif
 878
 879 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
 880    then the word-endianness is the same as for integers.  */
 881 #ifndef FLOAT_WORDS_BIG_ENDIAN
 882 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 883 #endif
 884
 885 #ifdef TARGET_FLT_EVAL_METHOD
 886 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 1
 887 #else
 888 #define TARGET_FLT_EVAL_METHOD 0
 889 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 0
 890 #endif
 891
 892 #ifndef TARGET_DEC_EVAL_METHOD
 893 #define TARGET_DEC_EVAL_METHOD 2
 894 #endif
 895
 896 #ifndef HOT_TEXT_SECTION_NAME
 897 #define HOT_TEXT_SECTION_NAME ".text.hot"
 898 #endif
 899
 900 #ifndef UNLIKELY_EXECUTED_TEXT_SECTION_NAME
 901 #define UNLIKELY_EXECUTED_TEXT_SECTION_NAME ".text.unlikely"
 902 #endif
 903
 904 #ifndef HAS_LONG_COND_BRANCH
 905 #define HAS_LONG_COND_BRANCH 0
 906 #endif
 907
 908 #ifndef HAS_LONG_UNCOND_BRANCH
 909 #define HAS_LONG_UNCOND_BRANCH 0
 910 #endif
 911
 912 /* By default, only attempt to parallelize bitwise operations, and
 913    possibly adds/subtracts using bit-twiddling.  */
 914 #ifndef UNITS_PER_SIMD_WORD
 915 #define UNITS_PER_SIMD_WORD(MODE) UNITS_PER_WORD
 916 #endif
 917
 918 /* Determine whether __cxa_atexit, rather than atexit, is used to
 919    register C++ destructors for local statics and global objects.  */
 920 #ifndef DEFAULT_USE_CXA_ATEXIT
 921 #define DEFAULT_USE_CXA_ATEXIT 0
 922 #endif
 923
 924 /* If none of these macros are defined, the port must use the new
 925    technique of defining constraints in the machine description.
 926    tm_p.h will define those macros that machine-independent code
 927    still uses.  */
 928 #if  !defined CONSTRAINT_LEN                    \
 929   && !defined REG_CLASS_FROM_LETTER             \
 930   && !defined REG_CLASS_FROM_CONSTRAINT         \
 931   && !defined CONST_OK_FOR_LETTER_P             \
 932   && !defined CONST_OK_FOR_CONSTRAINT_P         \
 933   && !defined CONST_DOUBLE_OK_FOR_LETTER_P      \
 934   && !defined CONST_DOUBLE_OK_FOR_CONSTRAINT_P  \
 935   && !defined EXTRA_CONSTRAINT                  \
 936   && !defined EXTRA_CONSTRAINT_STR              \
 937   && !defined EXTRA_MEMORY_CONSTRAINT           \
 938   && !defined EXTRA_ADDRESS_CONSTRAINT
 939
 940 #define USE_MD_CONSTRAINTS
 941
 942 #if GCC_VERSION >= 3000 && defined IN_GCC
 943 /* These old constraint macros shouldn't appear anywhere in a
 944    configuration using MD constraint definitions.  */
 945 #pragma GCC poison REG_CLASS_FROM_LETTER CONST_OK_FOR_LETTER_P \
 946                    CONST_DOUBLE_OK_FOR_LETTER_P EXTRA_CONSTRAINT
 947 #endif
 948
 949 #else /* old constraint mechanism in use */
 950
 951 /* Determine whether extra constraint letter should be handled
 952    via address reload (like 'o').  */
 953 #ifndef EXTRA_MEMORY_CONSTRAINT
 954 #define EXTRA_MEMORY_CONSTRAINT(C,STR) 0
 955 #endif
 956
 957 /* Determine whether extra constraint letter should be handled
 958    as an address (like 'p').  */
 959 #ifndef EXTRA_ADDRESS_CONSTRAINT
 960 #define EXTRA_ADDRESS_CONSTRAINT(C,STR) 0
 961 #endif
 962
 963 /* When a port defines CONSTRAINT_LEN, it should use DEFAULT_CONSTRAINT_LEN
 964    for all the characters that it does not want to change, so things like the
 965   'length' of a digit in a matching constraint is an implementation detail,
 966    and not part of the interface.  */
 967 #define DEFAULT_CONSTRAINT_LEN(C,STR) 1
 968
 969 #ifndef CONSTRAINT_LEN
 970 #define CONSTRAINT_LEN(C,STR) DEFAULT_CONSTRAINT_LEN (C, STR)
 971 #endif
 972
 973 #if defined (CONST_OK_FOR_LETTER_P) && ! defined (CONST_OK_FOR_CONSTRAINT_P)
 974 #define CONST_OK_FOR_CONSTRAINT_P(VAL,C,STR) CONST_OK_FOR_LETTER_P (VAL, C)
 975 #endif
 976
 977 #if defined (CONST_DOUBLE_OK_FOR_LETTER_P) && ! defined (CONST_DOUBLE_OK_FOR_CONSTRAINT_P)
 978 #define CONST_DOUBLE_OK_FOR_CONSTRAINT_P(OP,C,STR) \
 979   CONST_DOUBLE_OK_FOR_LETTER_P (OP, C)
 980 #endif
 981
 982 #ifndef REG_CLASS_FROM_CONSTRAINT
 983 #define REG_CLASS_FROM_CONSTRAINT(C,STR) REG_CLASS_FROM_LETTER (C)
 984 #endif
 985
 986 #if defined (EXTRA_CONSTRAINT) && ! defined (EXTRA_CONSTRAINT_STR)
 987 #define EXTRA_CONSTRAINT_STR(OP, C,STR) EXTRA_CONSTRAINT (OP, C)
 988 #endif
 989
 990 #endif /* old constraint mechanism in use */
 991
 992 /* Determine whether the entire c99 runtime
 993    is present in the runtime library.  */
 994 #ifndef TARGET_C99_FUNCTIONS
 995 #define TARGET_C99_FUNCTIONS 0
 996 #endif
 997
 998 /* Determine whether the target runtime library has
 999    a sincos implementation following the GNU extension.  */
1000 #ifndef TARGET_HAS_SINCOS
1001 #define TARGET_HAS_SINCOS 0
1002 #endif
1003
1004 /* Indicate that CLZ and CTZ are undefined at zero.  */
1005 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
1006 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
1007 #endif
1008 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
1009 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
1010 #endif
1011
1012 /* Provide a default value for STORE_FLAG_VALUE.  */
1013 #ifndef STORE_FLAG_VALUE
1014 #define STORE_FLAG_VALUE  1
1015 #endif
1016
1017 /* This macro is used to determine what the largest unit size that
1018    move_by_pieces can use is.  */
1019
1020 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
1021    move efficiently, as opposed to  MOVE_MAX which is the maximum
1022    number of bytes we can move with a single instruction.  */
1023
1024 #ifndef MOVE_MAX_PIECES
1025 #define MOVE_MAX_PIECES   MOVE_MAX
1026 #endif
1027
1028 #ifndef MAX_MOVE_MAX
1029 #define MAX_MOVE_MAX MOVE_MAX
1030 #endif
1031
1032 #ifndef MIN_UNITS_PER_WORD
1033 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
1034 #endif
1035
1036 #ifndef MAX_BITS_PER_WORD
1037 #define MAX_BITS_PER_WORD BITS_PER_WORD
1038 #endif
1039
1040 #ifndef STACK_POINTER_OFFSET
1041 #define STACK_POINTER_OFFSET    0
1042 #endif
1043
1044 #ifndef LOCAL_REGNO
1045 #define LOCAL_REGNO(REGNO)  0
1046 #endif
1047
1048 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1049    the stack pointer does not matter.  The value is tested only in
1050    functions that have frame pointers.  */
1051 #ifndef EXIT_IGNORE_STACK
1052 #define EXIT_IGNORE_STACK 0
1053 #endif
1054
1055 /* Assume that case vectors are not pc-relative.  */
1056 #ifndef CASE_VECTOR_PC_RELATIVE
1057 #define CASE_VECTOR_PC_RELATIVE 0
1058 #endif
1059
1060 /* Assume that trampolines need function alignment.  */
1061 #ifndef TRAMPOLINE_ALIGNMENT
1062 #define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY
1063 #endif
1064
1065 /* Register mappings for target machines without register windows.  */
1066 #ifndef INCOMING_REGNO
1067 #define INCOMING_REGNO(N) (N)
1068 #endif
1069
1070 #ifndef OUTGOING_REGNO
1071 #define OUTGOING_REGNO(N) (N)
1072 #endif
1073
1074 #ifndef SHIFT_COUNT_TRUNCATED
1075 #define SHIFT_COUNT_TRUNCATED 0
1076 #endif
1077
1078 #ifndef LEGITIMATE_PIC_OPERAND_P
1079 #define LEGITIMATE_PIC_OPERAND_P(X) 1
1080 #endif
1081
1082 #ifndef TARGET_MEM_CONSTRAINT
1083 #define TARGET_MEM_CONSTRAINT 'm'
1084 #endif
1085
1086 #ifndef REVERSIBLE_CC_MODE
1087 #define REVERSIBLE_CC_MODE(MODE) 0
1088 #endif
1089
1090 /* Biggest alignment supported by the object file format of this machine.  */
1091 #ifndef MAX_OFILE_ALIGNMENT
1092 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
1093 #endif
1094
1095 #ifndef FRAME_GROWS_DOWNWARD
1096 #define FRAME_GROWS_DOWNWARD 0
1097 #endif
1098
1099 /* On most machines, the CFA coincides with the first incoming parm.  */
1100 #ifndef ARG_POINTER_CFA_OFFSET
1101 #define ARG_POINTER_CFA_OFFSET(FNDECL) \
1102   (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
1103 #endif
1104
1105 /* On most machines, we use the CFA as DW_AT_frame_base.  */
1106 #ifndef CFA_FRAME_BASE_OFFSET
1107 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0
1108 #endif
1109
1110 /* The offset from the incoming value of %sp to the top of the stack frame
1111    for the current function.  */
1112 #ifndef INCOMING_FRAME_SP_OFFSET
1113 #define INCOMING_FRAME_SP_OFFSET 0
1114 #endif
1115
1116 #ifndef HARD_REGNO_NREGS_HAS_PADDING
1117 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
1118 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
1119 #endif
1120
1121 #ifndef OUTGOING_REG_PARM_STACK_SPACE
1122 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
1123 #endif
1124
1125 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
1126    the backend.  MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
1127    effort stack alignment supported by the backend.  If the backend
1128    supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
1129    MAX_STACK_ALIGNMENT are the same.  Otherwise, the incoming stack
1130    boundary will limit the maximum guaranteed stack alignment.  */
1131 #ifdef MAX_STACK_ALIGNMENT
1132 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
1133 #else
1134 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY
1135 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
1136 #endif
1137
1138 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
1139
1140 #ifndef LOCAL_ALIGNMENT
1141 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
1142 #endif
1143
1144 #ifndef STACK_SLOT_ALIGNMENT
1145 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
1146   ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
1147 #endif
1148
1149 #ifndef LOCAL_DECL_ALIGNMENT
1150 #define LOCAL_DECL_ALIGNMENT(DECL) \
1151   LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
1152 #endif
1153
1154 #ifndef MINIMUM_ALIGNMENT
1155 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN)
1156 #endif
1157
1158 /* Alignment value for attribute ((aligned)).  */
1159 #ifndef ATTRIBUTE_ALIGNED_VALUE
1160 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
1161 #endif
1162
1163 /* Many ports have no mode-dependent addresses (except possibly autoincrement
1164    and autodecrement addresses, which are handled by target-independent code
1165    in recog.c).  */
1166 #ifndef GO_IF_MODE_DEPENDENT_ADDRESS
1167 #define GO_IF_MODE_DEPENDENT_ADDRESS(X, WIN)
1168 #endif
1169
1170 /* For most ports anything that evaluates to a constant symbolic
1171    or integer value is acceptable as a constant address.  */
1172 #ifndef CONSTANT_ADDRESS_P
1173 #define CONSTANT_ADDRESS_P(X)   (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE)
1174 #endif
1175
1176 #ifndef MAX_FIXED_MODE_SIZE
1177 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
1178 #endif
1179
1180 /* Nonzero if structures and unions should be returned in memory.
1181
1182    This should only be defined if compatibility with another compiler or
1183    with an ABI is needed, because it results in slower code.  */
1184
1185 #ifndef DEFAULT_PCC_STRUCT_RETURN
1186 #define DEFAULT_PCC_STRUCT_RETURN 1
1187 #endif
1188
1189 #ifdef GCC_INSN_FLAGS_H
1190 /* Dependent default target macro definitions
1191
1192    This section of defaults.h defines target macros that depend on generated
1193    headers.  This is a bit awkward:  We want to put all default definitions
1194    for target macros in defaults.h, but some of the defaults depend on the
1195    HAVE_* flags defines of insn-flags.h.  But insn-flags.h is not always
1196    included by files that do include defaults.h.
1197
1198    Fortunately, the default macro definitions that depend on the HAVE_*
1199    macros are also the ones that will only be used inside GCC itself, i.e.
1200    not in the gen* programs or in target objects like libgcc.
1201
1202    Obviously, it would be best to keep this section of defaults.h as small
1203    as possible, by converting the macros defined below to target hooks or
1204    functions.
1205 */
1206
1207 /* Just because the user configured --with-sjlj-exceptions=no doesn't
1208    mean that we can use call frame exceptions.  Detect that the target
1209    has appropriate support.  */
1210
1211 #ifndef MUST_USE_SJLJ_EXCEPTIONS
1212 # if defined (EH_RETURN_DATA_REGNO)                     \
1213        && (defined (TARGET_UNWIND_INFO)                 \
1214            || (DWARF2_UNWIND_INFO                       \
1215                && (defined (EH_RETURN_HANDLER_RTX)      \
1216                    || defined (HAVE_eh_return))))
1217 #  define MUST_USE_SJLJ_EXCEPTIONS      0
1218 # else
1219 #  define MUST_USE_SJLJ_EXCEPTIONS      1
1220 # endif
1221 #endif
1222
1223 #ifdef CONFIG_SJLJ_EXCEPTIONS
1224 # if CONFIG_SJLJ_EXCEPTIONS == 1
1225 #  define USING_SJLJ_EXCEPTIONS         1
1226 # endif
1227 # if CONFIG_SJLJ_EXCEPTIONS == 0
1228 #  define USING_SJLJ_EXCEPTIONS         0
1229 #  if !defined(EH_RETURN_DATA_REGNO)
1230     #error "EH_RETURN_DATA_REGNO required"
1231 #  endif
1232 #  if ! (defined(TARGET_UNWIND_INFO) || DWARF2_UNWIND_INFO)
1233     #error "{DWARF2,TARGET}_UNWIND_INFO required"
1234 #  endif
1235 #  if !defined(TARGET_UNWIND_INFO) \
1236         && !(defined(EH_RETURN_HANDLER_RTX) || defined(HAVE_eh_return))
1237     #error "EH_RETURN_HANDLER_RTX or eh_return required"
1238 #  endif
1239 /* Usually the above error checks will have already triggered an
1240    error, but backends may set MUST_USE_SJLJ_EXCEPTIONS for their own
1241    reasons.  */
1242 #  if MUST_USE_SJLJ_EXCEPTIONS
1243     #error "Must use SJLJ exceptions but configured not to"
1244 #  endif
1245 # endif
1246 #else
1247 # define USING_SJLJ_EXCEPTIONS          MUST_USE_SJLJ_EXCEPTIONS
1248 #endif
1249
1250 /* The default branch cost is 1.  */
1251 #ifndef BRANCH_COST
1252 #define BRANCH_COST(speed_p, predictable_p) 1
1253 #endif
1254
1255 /* If a memory-to-memory move would take MOVE_RATIO or more simple
1256    move-instruction sequences, we will do a movmem or libcall instead.  */
1257
1258 #ifndef MOVE_RATIO
1259 #if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti)
1260 #define MOVE_RATIO(speed) 2
1261 #else
1262 /* If we are optimizing for space (-Os), cut down the default move ratio.  */
1263 #define MOVE_RATIO(speed) ((speed) ? 15 : 3)
1264 #endif
1265 #endif
1266
1267 /* If a clear memory operation would take CLEAR_RATIO or more simple
1268    move-instruction sequences, we will do a setmem or libcall instead.  */
1269
1270 #ifndef CLEAR_RATIO
1271 #if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
1272 #define CLEAR_RATIO(speed) 2
1273 #else
1274 /* If we are optimizing for space, cut down the default clear ratio.  */
1275 #define CLEAR_RATIO(speed) ((speed) ? 15 :3)
1276 #endif
1277 #endif
1278
1279 /* If a memory set (to value other than zero) operation would take
1280    SET_RATIO or more simple move-instruction sequences, we will do a movmem
1281    or libcall instead.  */
1282 #ifndef SET_RATIO
1283 #define SET_RATIO(speed) MOVE_RATIO(speed)
1284 #endif
1285
1286 /* Supply a default definition for FUNCTION_ARG_PADDING:
1287    usually pad upward, but pad short args downward on
1288    big-endian machines.  */
1289
1290 #define DEFAULT_FUNCTION_ARG_PADDING(MODE, TYPE)                        \
1291   (! BYTES_BIG_ENDIAN                                                   \
1292    ? upward                                                             \
1293    : (((MODE) == BLKmode                                                \
1294        ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST         \
1295           && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \
1296        : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY)                       \
1297       ? downward : upward))
1298
1299 #ifndef FUNCTION_ARG_PADDING
1300 #define FUNCTION_ARG_PADDING(MODE, TYPE)        \
1301   DEFAULT_FUNCTION_ARG_PADDING ((MODE), (TYPE))
1302 #endif
1303
1304 /* Supply a default definition for FUNCTION_ARG_BOUNDARY.  Normally, we let
1305    FUNCTION_ARG_PADDING, which also pads the length, handle any needed
1306    alignment.  */
1307
1308 #ifndef FUNCTION_ARG_BOUNDARY
1309 #define FUNCTION_ARG_BOUNDARY(MODE, TYPE)       PARM_BOUNDARY
1310 #endif
1311
1312 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
1313    Normally move_insn, so Pmode stack pointer.  */
1314
1315 #ifndef STACK_SAVEAREA_MODE
1316 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
1317 #endif
1318
1319 /* Supply a default definition of STACK_SIZE_MODE for
1320    allocate_dynamic_stack_space.  Normally PLUS/MINUS, so word_mode.  */
1321
1322 #ifndef STACK_SIZE_MODE
1323 #define STACK_SIZE_MODE word_mode
1324 #endif
1325
1326 /* Provide default values for the macros controlling stack checking.  */
1327
1328 /* The default is neither full builtin stack checking...  */
1329 #ifndef STACK_CHECK_BUILTIN
1330 #define STACK_CHECK_BUILTIN 0
1331 #endif
1332
1333 /* ...nor static builtin stack checking.  */
1334 #ifndef STACK_CHECK_STATIC_BUILTIN
1335 #define STACK_CHECK_STATIC_BUILTIN 0
1336 #endif
1337
1338 /* The default interval is one page (4096 bytes).  */
1339 #ifndef STACK_CHECK_PROBE_INTERVAL_EXP
1340 #define STACK_CHECK_PROBE_INTERVAL_EXP 12
1341 #endif
1342
1343 /* The default is not to move the stack pointer.  */
1344 #ifndef STACK_CHECK_MOVING_SP
1345 #define STACK_CHECK_MOVING_SP 0
1346 #endif
1347
1348 /* This is a kludge to try to capture the discrepancy between the old
1349    mechanism (generic stack checking) and the new mechanism (static
1350    builtin stack checking).  STACK_CHECK_PROTECT needs to be bumped
1351    for the latter because part of the protection area is effectively
1352    included in STACK_CHECK_MAX_FRAME_SIZE for the former.  */
1353 #ifdef STACK_CHECK_PROTECT
1354 #define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
1355 #else
1356 #define STACK_OLD_CHECK_PROTECT \
1357  (USING_SJLJ_EXCEPTIONS ? 75 * UNITS_PER_WORD : 8 * 1024)
1358 #endif
1359
1360 /* Minimum amount of stack required to recover from an anticipated stack
1361    overflow detection.  The default value conveys an estimate of the amount
1362    of stack required to propagate an exception.  */
1363 #ifndef STACK_CHECK_PROTECT
1364 #define STACK_CHECK_PROTECT \
1365  (USING_SJLJ_EXCEPTIONS ? 75 * UNITS_PER_WORD : 12 * 1024)
1366 #endif
1367
1368 /* Make the maximum frame size be the largest we can and still only need
1369    one probe per function.  */
1370 #ifndef STACK_CHECK_MAX_FRAME_SIZE
1371 #define STACK_CHECK_MAX_FRAME_SIZE \
1372   ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD)
1373 #endif
1374
1375 /* This is arbitrary, but should be large enough everywhere.  */
1376 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
1377 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
1378 #endif
1379
1380 /* Provide a reasonable default for the maximum size of an object to
1381    allocate in the fixed frame.  We may need to be able to make this
1382    controllable by the user at some point.  */
1383 #ifndef STACK_CHECK_MAX_VAR_SIZE
1384 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
1385 #endif
1386
1387 #ifndef SWITCHABLE_TARGET
1388 #define SWITCHABLE_TARGET 0
1389 #endif
1390
1391 #endif /* GCC_INSN_FLAGS_H  */
1392
1393 #endif  /* ! GCC_DEFAULTS_H */