gcc/defaults.h

   1 /* Definitions of various defaults for tm.h macros.
   2    Copyright (C) 1992-2014 Free Software Foundation, Inc.
   3    Contributed by Ron Guilmette (rfg@monkeys.com)
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 3, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  26 #ifndef GCC_DEFAULTS_H
  27 #define GCC_DEFAULTS_H
  28
  29 /* How to start an assembler comment.  */
  30 #ifndef ASM_COMMENT_START
  31 #define ASM_COMMENT_START ";#"
  32 #endif
  33
  34 /* Store in OUTPUT a string (made with alloca) containing an
  35    assembler-name for a local static variable or function named NAME.
  36    LABELNO is an integer which is different for each call.  */
  37
  38 #ifndef ASM_PN_FORMAT
  39 # ifndef NO_DOT_IN_LABEL
  40 #  define ASM_PN_FORMAT "%s.%lu"
  41 # else
  42 #  ifndef NO_DOLLAR_IN_LABEL
  43 #   define ASM_PN_FORMAT "%s$%lu"
  44 #  else
  45 #   define ASM_PN_FORMAT "__%s_%lu"
  46 #  endif
  47 # endif
  48 #endif /* ! ASM_PN_FORMAT */
  49
  50 #ifndef ASM_FORMAT_PRIVATE_NAME
  51 # define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
  52   do { const char *const name_ = (NAME); \
  53        char *const output_ = (OUTPUT) = \
  54          (char *) alloca (strlen (name_) + 32); \
  55        sprintf (output_, ASM_PN_FORMAT, name_, (unsigned long)(LABELNO)); \
  56   } while (0)
  57 #endif
  58
  59 /* Choose a reasonable default for ASM_OUTPUT_ASCII.  */
  60
  61 #ifndef ASM_OUTPUT_ASCII
  62 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
  63   do {                                                                        \
  64     FILE *_hide_asm_out_file = (MYFILE);                                      \
  65     const unsigned char *_hide_p = (const unsigned char *) (MYSTRING);        \
  66     int _hide_thissize = (MYLENGTH);                                          \
  67     {                                                                         \
  68       FILE *asm_out_file = _hide_asm_out_file;                                \
  69       const unsigned char *p = _hide_p;                                       \
  70       int thissize = _hide_thissize;                                          \
  71       int i;                                                                  \
  72       fprintf (asm_out_file, "\t.ascii \"");                                  \
  73                                                                               \
  74       for (i = 0; i < thissize; i++)                                          \
  75         {                                                                     \
  76           int c = p[i];                                                       \
  77           if (c == '\"' || c == '\\')                                         \
  78             putc ('\\', asm_out_file);                                        \
  79           if (ISPRINT (c))                                                    \
  80             putc (c, asm_out_file);                                           \
  81           else                                                                \
  82             {                                                                 \
  83               fprintf (asm_out_file, "\\%o", c);                              \
  84               /* After an octal-escape, if a digit follows,                   \
  85                  terminate one string constant and start another.             \
  86                  The VAX assembler fails to stop reading the escape           \
  87                  after three digits, so this is the only way we               \
  88                  can get it to parse the data properly.  */                   \
  89               if (i < thissize - 1 && ISDIGIT (p[i + 1]))                     \
  90                 fprintf (asm_out_file, "\"\n\t.ascii \"");                    \
  91           }                                                                   \
  92         }                                                                     \
  93       fprintf (asm_out_file, "\"\n");                                         \
  94     }                                                                         \
  95   }                                                                           \
  96   while (0)
  97 #endif
  98
  99 /* This is how we tell the assembler to equate two values.  */
 100 #ifdef SET_ASM_OP
 101 #ifndef ASM_OUTPUT_DEF
 102 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
 103  do {   fprintf ((FILE), "%s", SET_ASM_OP);                             \
 104         assemble_name (FILE, LABEL1);                                   \
 105         fprintf (FILE, ",");                                            \
 106         assemble_name (FILE, LABEL2);                                   \
 107         fprintf (FILE, "\n");                                           \
 108   } while (0)
 109 #endif
 110 #endif
 111
 112 #ifndef IFUNC_ASM_TYPE
 113 #define IFUNC_ASM_TYPE "gnu_indirect_function"
 114 #endif
 115
 116 #ifndef TLS_COMMON_ASM_OP
 117 #define TLS_COMMON_ASM_OP ".tls_common"
 118 #endif
 119
 120 #if defined (HAVE_AS_TLS) && !defined (ASM_OUTPUT_TLS_COMMON)
 121 #define ASM_OUTPUT_TLS_COMMON(FILE, DECL, NAME, SIZE)                   \
 122   do                                                                    \
 123     {                                                                   \
 124       fprintf ((FILE), "\t%s\t", TLS_COMMON_ASM_OP);                    \
 125       assemble_name ((FILE), (NAME));                                   \
 126       fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n",          \
 127                (SIZE), DECL_ALIGN (DECL) / BITS_PER_UNIT);              \
 128     }                                                                   \
 129   while (0)
 130 #endif
 131
 132 /* Decide whether to defer emitting the assembler output for an equate
 133    of two values.  The default is to not defer output.  */
 134 #ifndef TARGET_DEFERRED_OUTPUT_DEFS
 135 #define TARGET_DEFERRED_OUTPUT_DEFS(DECL,TARGET) false
 136 #endif
 137
 138 /* This is how to output the definition of a user-level label named
 139    NAME, such as the label on variable NAME.  */
 140
 141 #ifndef ASM_OUTPUT_LABEL
 142 #define ASM_OUTPUT_LABEL(FILE,NAME) \
 143   do {                                          \
 144     assemble_name ((FILE), (NAME));             \
 145     fputs (":\n", (FILE));                      \
 146   } while (0)
 147 #endif
 148
 149 /* This is how to output the definition of a user-level label named
 150    NAME, such as the label on a function.  */
 151
 152 #ifndef ASM_OUTPUT_FUNCTION_LABEL
 153 #define ASM_OUTPUT_FUNCTION_LABEL(FILE, NAME, DECL) \
 154   ASM_OUTPUT_LABEL ((FILE), (NAME))
 155 #endif
 156
 157 /* Output the definition of a compiler-generated label named NAME.  */
 158 #ifndef ASM_OUTPUT_INTERNAL_LABEL
 159 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,NAME)    \
 160   do {                                          \
 161     assemble_name_raw ((FILE), (NAME));         \
 162     fputs (":\n", (FILE));                      \
 163   } while (0)
 164 #endif
 165
 166 /* This is how to output a reference to a user-level label named NAME.  */
 167
 168 #ifndef ASM_OUTPUT_LABELREF
 169 #define ASM_OUTPUT_LABELREF(FILE,NAME)  \
 170   do {                                                  \
 171     fputs (user_label_prefix, (FILE));                  \
 172     fputs ((NAME), (FILE));                             \
 173   } while (0);
 174 #endif
 175
 176 /* Allow target to print debug info labels specially.  This is useful for
 177    VLIW targets, since debug info labels should go into the middle of
 178    instruction bundles instead of breaking them.  */
 179
 180 #ifndef ASM_OUTPUT_DEBUG_LABEL
 181 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
 182   (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM)
 183 #endif
 184
 185 /* This is how we tell the assembler that a symbol is weak.  */
 186 #ifndef ASM_OUTPUT_WEAK_ALIAS
 187 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
 188 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE)      \
 189   do                                                    \
 190     {                                                   \
 191       ASM_WEAKEN_LABEL (STREAM, NAME);                  \
 192       if (VALUE)                                        \
 193         ASM_OUTPUT_DEF (STREAM, NAME, VALUE);           \
 194     }                                                   \
 195   while (0)
 196 #endif
 197 #endif
 198
 199 /* This is how we tell the assembler that a symbol is a weak alias to
 200    another symbol that doesn't require the other symbol to be defined.
 201    Uses of the former will turn into weak uses of the latter, i.e.,
 202    uses that, in case the latter is undefined, will not cause errors,
 203    and will add it to the symbol table as weak undefined.  However, if
 204    the latter is referenced directly, a strong reference prevails.  */
 205 #ifndef ASM_OUTPUT_WEAKREF
 206 #if defined HAVE_GAS_WEAKREF
 207 #define ASM_OUTPUT_WEAKREF(FILE, DECL, NAME, VALUE)                     \
 208   do                                                                    \
 209     {                                                                   \
 210       fprintf ((FILE), "\t.weakref\t");                                 \
 211       assemble_name ((FILE), (NAME));                                   \
 212       fprintf ((FILE), ",");                                            \
 213       assemble_name ((FILE), (VALUE));                                  \
 214       fprintf ((FILE), "\n");                                           \
 215     }                                                                   \
 216   while (0)
 217 #endif
 218 #endif
 219
 220 /* How to emit a .type directive.  */
 221 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE
 222 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT
 223 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE)   \
 224   do                                                    \
 225     {                                                   \
 226       fputs (TYPE_ASM_OP, STREAM);                      \
 227       assemble_name (STREAM, NAME);                     \
 228       fputs (", ", STREAM);                             \
 229       fprintf (STREAM, TYPE_OPERAND_FMT, TYPE);         \
 230       putc ('\n', STREAM);                              \
 231     }                                                   \
 232   while (0)
 233 #endif
 234 #endif
 235
 236 /* How to emit a .size directive.  */
 237 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE
 238 #ifdef SIZE_ASM_OP
 239 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE)   \
 240   do                                                    \
 241     {                                                   \
 242       HOST_WIDE_INT size_ = (SIZE);                     \
 243       fputs (SIZE_ASM_OP, STREAM);                      \
 244       assemble_name (STREAM, NAME);                     \
 245       fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \
 246     }                                                   \
 247   while (0)
 248
 249 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME)          \
 250   do                                                    \
 251     {                                                   \
 252       fputs (SIZE_ASM_OP, STREAM);                      \
 253       assemble_name (STREAM, NAME);                     \
 254       fputs (", .-", STREAM);                           \
 255       assemble_name (STREAM, NAME);                     \
 256       putc ('\n', STREAM);                              \
 257     }                                                   \
 258   while (0)
 259
 260 #endif
 261 #endif
 262
 263 /* This determines whether or not we support weak symbols.  SUPPORTS_WEAK
 264    must be a preprocessor constant.  */
 265 #ifndef SUPPORTS_WEAK
 266 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
 267 #define SUPPORTS_WEAK 1
 268 #else
 269 #define SUPPORTS_WEAK 0
 270 #endif
 271 #endif
 272
 273 /* This determines whether or not we support weak symbols during target
 274    code generation.  TARGET_SUPPORTS_WEAK can be any valid C expression.  */
 275 #ifndef TARGET_SUPPORTS_WEAK
 276 #define TARGET_SUPPORTS_WEAK (SUPPORTS_WEAK)
 277 #endif
 278
 279 /* This determines whether or not we support the discriminator
 280    attribute in the .loc directive.  */
 281 #ifndef SUPPORTS_DISCRIMINATOR
 282 #ifdef HAVE_GAS_DISCRIMINATOR
 283 #define SUPPORTS_DISCRIMINATOR 1
 284 #else
 285 #define SUPPORTS_DISCRIMINATOR 0
 286 #endif
 287 #endif
 288
 289 /* This determines whether or not we support link-once semantics.  */
 290 #ifndef SUPPORTS_ONE_ONLY
 291 #ifdef MAKE_DECL_ONE_ONLY
 292 #define SUPPORTS_ONE_ONLY 1
 293 #else
 294 #define SUPPORTS_ONE_ONLY 0
 295 #endif
 296 #endif
 297
 298 /* This determines whether weak symbols must be left out of a static
 299    archive's table of contents.  Defining this macro to be nonzero has
 300    the consequence that certain symbols will not be made weak that
 301    otherwise would be.  The C++ ABI requires this macro to be zero;
 302    see the documentation.  */
 303 #ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 304 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
 305 #endif
 306
 307 /* This determines whether or not we need linkonce unwind information.  */
 308 #ifndef TARGET_USES_WEAK_UNWIND_INFO
 309 #define TARGET_USES_WEAK_UNWIND_INFO 0
 310 #endif
 311
 312 /* By default, there is no prefix on user-defined symbols.  */
 313 #ifndef USER_LABEL_PREFIX
 314 #define USER_LABEL_PREFIX ""
 315 #endif
 316
 317 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
 318    provide a weak attribute.  Else define it to nothing.
 319
 320    This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
 321    not available at that time.
 322
 323    Note, this is only for use by target files which we know are to be
 324    compiled by GCC.  */
 325 #ifndef TARGET_ATTRIBUTE_WEAK
 326 # if SUPPORTS_WEAK
 327 #  define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
 328 # else
 329 #  define TARGET_ATTRIBUTE_WEAK
 330 # endif
 331 #endif
 332
 333 /* By default we can assume that all global symbols are in one namespace,
 334    across all shared libraries.  */
 335 #ifndef MULTIPLE_SYMBOL_SPACES
 336 # define MULTIPLE_SYMBOL_SPACES 0
 337 #endif
 338
 339 /* If the target supports init_priority C++ attribute, give
 340    SUPPORTS_INIT_PRIORITY a nonzero value.  */
 341 #ifndef SUPPORTS_INIT_PRIORITY
 342 #define SUPPORTS_INIT_PRIORITY 1
 343 #endif /* SUPPORTS_INIT_PRIORITY */
 344
 345 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
 346    the rest of the DWARF 2 frame unwind support is also provided.  */
 347 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
 348 #define DWARF2_UNWIND_INFO 1
 349 #endif
 350
 351 /* If we have named sections, and we're using crtstuff to run ctors,
 352    use them for registering eh frame information.  */
 353 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
 354     && !defined (EH_FRAME_IN_DATA_SECTION)
 355 #ifndef EH_FRAME_SECTION_NAME
 356 #define EH_FRAME_SECTION_NAME ".eh_frame"
 357 #endif
 358 #endif
 359
 360 /* On many systems, different EH table encodings are used under
 361    difference circumstances.  Some will require runtime relocations;
 362    some will not.  For those that do not require runtime relocations,
 363    we would like to make the table read-only.  However, since the
 364    read-only tables may need to be combined with read-write tables
 365    that do require runtime relocation, it is not safe to make the
 366    tables read-only unless the linker will merge read-only and
 367    read-write sections into a single read-write section.  If your
 368    linker does not have this ability, but your system is such that no
 369    encoding used with non-PIC code will ever require a runtime
 370    relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in
 371    your target configuration file.  */
 372 #ifndef EH_TABLES_CAN_BE_READ_ONLY
 373 #ifdef HAVE_LD_RO_RW_SECTION_MIXING
 374 #define EH_TABLES_CAN_BE_READ_ONLY 1
 375 #else
 376 #define EH_TABLES_CAN_BE_READ_ONLY 0
 377 #endif
 378 #endif
 379
 380 /* If we have named section and we support weak symbols, then use the
 381    .jcr section for recording java classes which need to be registered
 382    at program start-up time.  */
 383 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
 384 #ifndef JCR_SECTION_NAME
 385 #define JCR_SECTION_NAME ".jcr"
 386 #endif
 387 #endif
 388
 389 /* This decision to use a .jcr section can be overridden by defining
 390    USE_JCR_SECTION to 0 in target file.  This is necessary if target
 391    can define JCR_SECTION_NAME but does not have crtstuff or
 392    linker support for .jcr section.  */
 393 #ifndef TARGET_USE_JCR_SECTION
 394 #ifdef JCR_SECTION_NAME
 395 #define TARGET_USE_JCR_SECTION 1
 396 #else
 397 #define TARGET_USE_JCR_SECTION 0
 398 #endif
 399 #endif
 400
 401 /* Number of hardware registers that go into the DWARF-2 unwind info.
 402    If not defined, equals FIRST_PSEUDO_REGISTER  */
 403
 404 #ifndef DWARF_FRAME_REGISTERS
 405 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
 406 #endif
 407
 408 /* Offsets recorded in opcodes are a multiple of this alignment factor.  */
 409 #ifndef DWARF_CIE_DATA_ALIGNMENT
 410 #ifdef STACK_GROWS_DOWNWARD
 411 #define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD))
 412 #else
 413 #define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD)
 414 #endif
 415 #endif
 416
 417 /* The DWARF 2 CFA column which tracks the return address.  Normally this
 418    is the column for PC, or the first column after all of the hard
 419    registers.  */
 420 #ifndef DWARF_FRAME_RETURN_COLUMN
 421 #ifdef PC_REGNUM
 422 #define DWARF_FRAME_RETURN_COLUMN       DWARF_FRAME_REGNUM (PC_REGNUM)
 423 #else
 424 #define DWARF_FRAME_RETURN_COLUMN       DWARF_FRAME_REGISTERS
 425 #endif
 426 #endif
 427
 428 /* How to renumber registers for dbx and gdb.  If not defined, assume
 429    no renumbering is necessary.  */
 430
 431 #ifndef DBX_REGISTER_NUMBER
 432 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 433 #endif
 434
 435 /* The mapping from gcc register number to DWARF 2 CFA column number.
 436    By default, we just provide columns for all registers.  */
 437 #ifndef DWARF_FRAME_REGNUM
 438 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
 439 #endif
 440
 441 /* Map register numbers held in the call frame info that gcc has
 442    collected using DWARF_FRAME_REGNUM to those that should be output in
 443    .debug_frame and .eh_frame.  */
 444 #ifndef DWARF2_FRAME_REG_OUT
 445 #define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) (REGNO)
 446 #endif
 447
 448 /* The size of addresses as they appear in the Dwarf 2 data.
 449    Some architectures use word addresses to refer to code locations,
 450    but Dwarf 2 info always uses byte addresses.  On such machines,
 451    Dwarf 2 addresses need to be larger than the architecture's
 452    pointers.  */
 453 #ifndef DWARF2_ADDR_SIZE
 454 #define DWARF2_ADDR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
 455 #endif
 456
 457 /* The size in bytes of a DWARF field indicating an offset or length
 458    relative to a debug info section, specified to be 4 bytes in the
 459    DWARF-2 specification.  The SGI/MIPS ABI defines it to be the same
 460    as PTR_SIZE.  */
 461 #ifndef DWARF_OFFSET_SIZE
 462 #define DWARF_OFFSET_SIZE 4
 463 #endif
 464
 465 /* The size in bytes of a DWARF 4 type signature.  */
 466 #ifndef DWARF_TYPE_SIGNATURE_SIZE
 467 #define DWARF_TYPE_SIGNATURE_SIZE 8
 468 #endif
 469
 470 /* Default sizes for base C types.  If the sizes are different for
 471    your target, you should override these values by defining the
 472    appropriate symbols in your tm.h file.  */
 473
 474 #ifndef BITS_PER_WORD
 475 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
 476 #endif
 477
 478 #ifndef CHAR_TYPE_SIZE
 479 #define CHAR_TYPE_SIZE BITS_PER_UNIT
 480 #endif
 481
 482 #ifndef BOOL_TYPE_SIZE
 483 /* `bool' has size and alignment `1', on almost all platforms.  */
 484 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
 485 #endif
 486
 487 #ifndef SHORT_TYPE_SIZE
 488 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
 489 #endif
 490
 491 #ifndef INT_TYPE_SIZE
 492 #define INT_TYPE_SIZE BITS_PER_WORD
 493 #endif
 494
 495 #ifndef LONG_TYPE_SIZE
 496 #define LONG_TYPE_SIZE BITS_PER_WORD
 497 #endif
 498
 499 #ifndef LONG_LONG_TYPE_SIZE
 500 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
 501 #endif
 502
 503 #ifndef WCHAR_TYPE_SIZE
 504 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
 505 #endif
 506
 507 #ifndef FLOAT_TYPE_SIZE
 508 #define FLOAT_TYPE_SIZE BITS_PER_WORD
 509 #endif
 510
 511 #ifndef DOUBLE_TYPE_SIZE
 512 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 513 #endif
 514
 515 #ifndef LONG_DOUBLE_TYPE_SIZE
 516 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 517 #endif
 518
 519 #ifndef DECIMAL32_TYPE_SIZE
 520 #define DECIMAL32_TYPE_SIZE 32
 521 #endif
 522
 523 #ifndef DECIMAL64_TYPE_SIZE
 524 #define DECIMAL64_TYPE_SIZE 64
 525 #endif
 526
 527 #ifndef DECIMAL128_TYPE_SIZE
 528 #define DECIMAL128_TYPE_SIZE 128
 529 #endif
 530
 531 #ifndef SHORT_FRACT_TYPE_SIZE
 532 #define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT
 533 #endif
 534
 535 #ifndef FRACT_TYPE_SIZE
 536 #define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2)
 537 #endif
 538
 539 #ifndef LONG_FRACT_TYPE_SIZE
 540 #define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4)
 541 #endif
 542
 543 #ifndef LONG_LONG_FRACT_TYPE_SIZE
 544 #define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8)
 545 #endif
 546
 547 #ifndef SHORT_ACCUM_TYPE_SIZE
 548 #define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2)
 549 #endif
 550
 551 #ifndef ACCUM_TYPE_SIZE
 552 #define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2)
 553 #endif
 554
 555 #ifndef LONG_ACCUM_TYPE_SIZE
 556 #define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2)
 557 #endif
 558
 559 #ifndef LONG_LONG_ACCUM_TYPE_SIZE
 560 #define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2)
 561 #endif
 562
 563 /* We let tm.h override the types used here, to handle trivial differences
 564    such as the choice of unsigned int or long unsigned int for size_t.
 565    When machines start needing nontrivial differences in the size type,
 566    it would be best to do something here to figure out automatically
 567    from other information what type to use.  */
 568
 569 #ifndef SIZE_TYPE
 570 #define SIZE_TYPE "long unsigned int"
 571 #endif
 572
 573 #ifndef SIZETYPE
 574 #define SIZETYPE SIZE_TYPE
 575 #endif
 576
 577 #ifndef PID_TYPE
 578 #define PID_TYPE "int"
 579 #endif
 580
 581 /* If GCC knows the exact uint_least16_t and uint_least32_t types from
 582    <stdint.h>, use them for char16_t and char32_t.  Otherwise, use
 583    these guesses; getting the wrong type of a given width will not
 584    affect C++ name mangling because in C++ these are distinct types
 585    not typedefs.  */
 586
 587 #ifdef UINT_LEAST16_TYPE
 588 #define CHAR16_TYPE UINT_LEAST16_TYPE
 589 #else
 590 #define CHAR16_TYPE "short unsigned int"
 591 #endif
 592
 593 #ifdef UINT_LEAST32_TYPE
 594 #define CHAR32_TYPE UINT_LEAST32_TYPE
 595 #else
 596 #define CHAR32_TYPE "unsigned int"
 597 #endif
 598
 599 #ifndef WCHAR_TYPE
 600 #define WCHAR_TYPE "int"
 601 #endif
 602
 603 /* WCHAR_TYPE gets overridden by -fshort-wchar.  */
 604 #define MODIFIED_WCHAR_TYPE \
 605         (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE)
 606
 607 #ifndef PTRDIFF_TYPE
 608 #define PTRDIFF_TYPE "long int"
 609 #endif
 610
 611 #ifndef WINT_TYPE
 612 #define WINT_TYPE "unsigned int"
 613 #endif
 614
 615 #ifndef INTMAX_TYPE
 616 #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)     \
 617                      ? "int"                                    \
 618                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 619                         ? "long int"                            \
 620                         : "long long int"))
 621 #endif
 622
 623 #ifndef UINTMAX_TYPE
 624 #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)    \
 625                      ? "unsigned int"                           \
 626                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 627                         ? "long unsigned int"                   \
 628                         : "long long unsigned int"))
 629 #endif
 630
 631
 632 /* There are no default definitions of these <stdint.h> types.  */
 633
 634 #ifndef SIG_ATOMIC_TYPE
 635 #define SIG_ATOMIC_TYPE ((const char *) NULL)
 636 #endif
 637
 638 #ifndef INT8_TYPE
 639 #define INT8_TYPE ((const char *) NULL)
 640 #endif
 641
 642 #ifndef INT16_TYPE
 643 #define INT16_TYPE ((const char *) NULL)
 644 #endif
 645
 646 #ifndef INT32_TYPE
 647 #define INT32_TYPE ((const char *) NULL)
 648 #endif
 649
 650 #ifndef INT64_TYPE
 651 #define INT64_TYPE ((const char *) NULL)
 652 #endif
 653
 654 #ifndef UINT8_TYPE
 655 #define UINT8_TYPE ((const char *) NULL)
 656 #endif
 657
 658 #ifndef UINT16_TYPE
 659 #define UINT16_TYPE ((const char *) NULL)
 660 #endif
 661
 662 #ifndef UINT32_TYPE
 663 #define UINT32_TYPE ((const char *) NULL)
 664 #endif
 665
 666 #ifndef UINT64_TYPE
 667 #define UINT64_TYPE ((const char *) NULL)
 668 #endif
 669
 670 #ifndef INT_LEAST8_TYPE
 671 #define INT_LEAST8_TYPE ((const char *) NULL)
 672 #endif
 673
 674 #ifndef INT_LEAST16_TYPE
 675 #define INT_LEAST16_TYPE ((const char *) NULL)
 676 #endif
 677
 678 #ifndef INT_LEAST32_TYPE
 679 #define INT_LEAST32_TYPE ((const char *) NULL)
 680 #endif
 681
 682 #ifndef INT_LEAST64_TYPE
 683 #define INT_LEAST64_TYPE ((const char *) NULL)
 684 #endif
 685
 686 #ifndef UINT_LEAST8_TYPE
 687 #define UINT_LEAST8_TYPE ((const char *) NULL)
 688 #endif
 689
 690 #ifndef UINT_LEAST16_TYPE
 691 #define UINT_LEAST16_TYPE ((const char *) NULL)
 692 #endif
 693
 694 #ifndef UINT_LEAST32_TYPE
 695 #define UINT_LEAST32_TYPE ((const char *) NULL)
 696 #endif
 697
 698 #ifndef UINT_LEAST64_TYPE
 699 #define UINT_LEAST64_TYPE ((const char *) NULL)
 700 #endif
 701
 702 #ifndef INT_FAST8_TYPE
 703 #define INT_FAST8_TYPE ((const char *) NULL)
 704 #endif
 705
 706 #ifndef INT_FAST16_TYPE
 707 #define INT_FAST16_TYPE ((const char *) NULL)
 708 #endif
 709
 710 #ifndef INT_FAST32_TYPE
 711 #define INT_FAST32_TYPE ((const char *) NULL)
 712 #endif
 713
 714 #ifndef INT_FAST64_TYPE
 715 #define INT_FAST64_TYPE ((const char *) NULL)
 716 #endif
 717
 718 #ifndef UINT_FAST8_TYPE
 719 #define UINT_FAST8_TYPE ((const char *) NULL)
 720 #endif
 721
 722 #ifndef UINT_FAST16_TYPE
 723 #define UINT_FAST16_TYPE ((const char *) NULL)
 724 #endif
 725
 726 #ifndef UINT_FAST32_TYPE
 727 #define UINT_FAST32_TYPE ((const char *) NULL)
 728 #endif
 729
 730 #ifndef UINT_FAST64_TYPE
 731 #define UINT_FAST64_TYPE ((const char *) NULL)
 732 #endif
 733
 734 #ifndef INTPTR_TYPE
 735 #define INTPTR_TYPE ((const char *) NULL)
 736 #endif
 737
 738 #ifndef UINTPTR_TYPE
 739 #define UINTPTR_TYPE ((const char *) NULL)
 740 #endif
 741
 742 /* Width in bits of a pointer.  Mind the value of the macro `Pmode'.  */
 743 #ifndef POINTER_SIZE
 744 #define POINTER_SIZE BITS_PER_WORD
 745 #endif
 746
 747 #ifndef PIC_OFFSET_TABLE_REGNUM
 748 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
 749 #endif
 750
 751 #ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
 752 #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 0
 753 #endif
 754
 755 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
 756 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
 757 #endif
 758
 759 #ifndef TARGET_DECLSPEC
 760 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
 761 /* If the target supports the "dllimport" attribute, users are
 762    probably used to the "__declspec" syntax.  */
 763 #define TARGET_DECLSPEC 1
 764 #else
 765 #define TARGET_DECLSPEC 0
 766 #endif
 767 #endif
 768
 769 /* By default, the preprocessor should be invoked the same way in C++
 770    as in C.  */
 771 #ifndef CPLUSPLUS_CPP_SPEC
 772 #ifdef CPP_SPEC
 773 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
 774 #endif
 775 #endif
 776
 777 #ifndef ACCUMULATE_OUTGOING_ARGS
 778 #define ACCUMULATE_OUTGOING_ARGS 0
 779 #endif
 780
 781 /* By default, use the GNU runtime for Objective C.  */
 782 #ifndef NEXT_OBJC_RUNTIME
 783 #define NEXT_OBJC_RUNTIME 0
 784 #endif
 785
 786 /* Supply a default definition for PUSH_ARGS.  */
 787 #ifndef PUSH_ARGS
 788 #ifdef PUSH_ROUNDING
 789 #define PUSH_ARGS       !ACCUMULATE_OUTGOING_ARGS
 790 #else
 791 #define PUSH_ARGS       0
 792 #endif
 793 #endif
 794
 795 /* Decide whether a function's arguments should be processed
 796    from first to last or from last to first.
 797
 798    They should if the stack and args grow in opposite directions, but
 799    only if we have push insns.  */
 800
 801 #ifdef PUSH_ROUNDING
 802
 803 #ifndef PUSH_ARGS_REVERSED
 804 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
 805 #define PUSH_ARGS_REVERSED  PUSH_ARGS
 806 #endif
 807 #endif
 808
 809 #endif
 810
 811 #ifndef PUSH_ARGS_REVERSED
 812 #define PUSH_ARGS_REVERSED 0
 813 #endif
 814
 815 /* Default value for the alignment (in bits) a C conformant malloc has to
 816    provide. This default is intended to be safe and always correct.  */
 817 #ifndef MALLOC_ABI_ALIGNMENT
 818 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
 819 #endif
 820
 821 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
 822    STACK_BOUNDARY is required.  */
 823 #ifndef PREFERRED_STACK_BOUNDARY
 824 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
 825 #endif
 826
 827 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not
 828    defined.  */
 829 #ifndef INCOMING_STACK_BOUNDARY
 830 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY
 831 #endif
 832
 833 #ifndef TARGET_DEFAULT_PACK_STRUCT
 834 #define TARGET_DEFAULT_PACK_STRUCT 0
 835 #endif
 836
 837 /* By default, the vtable entries are void pointers, the so the alignment
 838    is the same as pointer alignment.  The value of this macro specifies
 839    the alignment of the vtable entry in bits.  It should be defined only
 840    when special alignment is necessary.  */
 841 #ifndef TARGET_VTABLE_ENTRY_ALIGN
 842 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
 843 #endif
 844
 845 /* There are a few non-descriptor entries in the vtable at offsets below
 846    zero.  If these entries must be padded (say, to preserve the alignment
 847    specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
 848    words in each data entry.  */
 849 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
 850 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
 851 #endif
 852
 853 /* Decide whether it is safe to use a local alias for a virtual function
 854    when constructing thunks.  */
 855 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
 856 #ifdef ASM_OUTPUT_DEF
 857 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
 858 #else
 859 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
 860 #endif
 861 #endif
 862
 863 /* Select a format to encode pointers in exception handling data.  We
 864    prefer those that result in fewer dynamic relocations.  Assume no
 865    special support here and encode direct references.  */
 866 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
 867 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  DW_EH_PE_absptr
 868 #endif
 869
 870 /* By default, the C++ compiler will use the lowest bit of the pointer
 871    to function to indicate a pointer-to-member-function points to a
 872    virtual member function.  However, if FUNCTION_BOUNDARY indicates
 873    function addresses aren't always even, the lowest bit of the delta
 874    field will be used.  */
 875 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
 876 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
 877   (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
 878    ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
 879 #endif
 880
 881 #ifndef DEFAULT_GDB_EXTENSIONS
 882 #define DEFAULT_GDB_EXTENSIONS 1
 883 #endif
 884
 885 /* If more than one debugging type is supported, you must define
 886    PREFERRED_DEBUGGING_TYPE to choose the default.  */
 887
 888 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
 889          + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
 890          + defined (VMS_DEBUGGING_INFO))
 891 #ifndef PREFERRED_DEBUGGING_TYPE
 892 #error You must define PREFERRED_DEBUGGING_TYPE
 893 #endif /* no PREFERRED_DEBUGGING_TYPE */
 894
 895 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
 896    here so other code needn't care.  */
 897 #elif defined DBX_DEBUGGING_INFO
 898 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 899
 900 #elif defined SDB_DEBUGGING_INFO
 901 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
 902
 903 #elif defined DWARF2_DEBUGGING_INFO
 904 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 905
 906 #elif defined VMS_DEBUGGING_INFO
 907 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
 908
 909 #elif defined XCOFF_DEBUGGING_INFO
 910 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
 911
 912 #else
 913 /* No debugging format is supported by this target.  */
 914 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
 915 #endif
 916
 917 #ifndef LARGEST_EXPONENT_IS_NORMAL
 918 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
 919 #endif
 920
 921 #ifndef ROUND_TOWARDS_ZERO
 922 #define ROUND_TOWARDS_ZERO 0
 923 #endif
 924
 925 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
 926 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
 927 #endif
 928
 929 /* True if the targets integer-comparison functions return { 0, 1, 2
 930    } to indicate { <, ==, > }.  False if { -1, 0, 1 } is used
 931    instead.  The libgcc routines are biased.  */
 932 #ifndef TARGET_LIB_INT_CMP_BIASED
 933 #define TARGET_LIB_INT_CMP_BIASED (true)
 934 #endif
 935
 936 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
 937    then the word-endianness is the same as for integers.  */
 938 #ifndef FLOAT_WORDS_BIG_ENDIAN
 939 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 940 #endif
 941
 942 #ifndef REG_WORDS_BIG_ENDIAN
 943 #define REG_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 944 #endif
 945
 946 #ifdef TARGET_FLT_EVAL_METHOD
 947 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 1
 948 #else
 949 #define TARGET_FLT_EVAL_METHOD 0
 950 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 0
 951 #endif
 952
 953 #ifndef TARGET_DEC_EVAL_METHOD
 954 #define TARGET_DEC_EVAL_METHOD 2
 955 #endif
 956
 957 #ifndef HAS_LONG_COND_BRANCH
 958 #define HAS_LONG_COND_BRANCH 0
 959 #endif
 960
 961 #ifndef HAS_LONG_UNCOND_BRANCH
 962 #define HAS_LONG_UNCOND_BRANCH 0
 963 #endif
 964
 965 /* Determine whether __cxa_atexit, rather than atexit, is used to
 966    register C++ destructors for local statics and global objects.  */
 967 #ifndef DEFAULT_USE_CXA_ATEXIT
 968 #define DEFAULT_USE_CXA_ATEXIT 0
 969 #endif
 970
 971 /* If none of these macros are defined, the port must use the new
 972    technique of defining constraints in the machine description.
 973    tm_p.h will define those macros that machine-independent code
 974    still uses.  */
 975 #if  !defined CONSTRAINT_LEN                    \
 976   && !defined REG_CLASS_FROM_LETTER             \
 977   && !defined REG_CLASS_FROM_CONSTRAINT         \
 978   && !defined CONST_OK_FOR_LETTER_P             \
 979   && !defined CONST_OK_FOR_CONSTRAINT_P         \
 980   && !defined CONST_DOUBLE_OK_FOR_LETTER_P      \
 981   && !defined CONST_DOUBLE_OK_FOR_CONSTRAINT_P  \
 982   && !defined EXTRA_CONSTRAINT                  \
 983   && !defined EXTRA_CONSTRAINT_STR              \
 984   && !defined EXTRA_MEMORY_CONSTRAINT           \
 985   && !defined EXTRA_ADDRESS_CONSTRAINT
 986
 987 #define USE_MD_CONSTRAINTS
 988
 989 #if GCC_VERSION >= 3000 && defined IN_GCC
 990 /* These old constraint macros shouldn't appear anywhere in a
 991    configuration using MD constraint definitions.  */
 992 #pragma GCC poison REG_CLASS_FROM_LETTER CONST_OK_FOR_LETTER_P \
 993                    CONST_DOUBLE_OK_FOR_LETTER_P EXTRA_CONSTRAINT
 994 #endif
 995
 996 #else /* old constraint mechanism in use */
 997
 998 /* Determine whether extra constraint letter should be handled
 999    via address reload (like 'o').  */
1000 #ifndef EXTRA_MEMORY_CONSTRAINT
1001 #define EXTRA_MEMORY_CONSTRAINT(C,STR) 0
1002 #endif
1003
1004 /* Determine whether extra constraint letter should be handled
1005    as an address (like 'p').  */
1006 #ifndef EXTRA_ADDRESS_CONSTRAINT
1007 #define EXTRA_ADDRESS_CONSTRAINT(C,STR) 0
1008 #endif
1009
1010 /* When a port defines CONSTRAINT_LEN, it should use DEFAULT_CONSTRAINT_LEN
1011    for all the characters that it does not want to change, so things like the
1012   'length' of a digit in a matching constraint is an implementation detail,
1013    and not part of the interface.  */
1014 #define DEFAULT_CONSTRAINT_LEN(C,STR) 1
1015
1016 #ifndef CONSTRAINT_LEN
1017 #define CONSTRAINT_LEN(C,STR) DEFAULT_CONSTRAINT_LEN (C, STR)
1018 #endif
1019
1020 #if defined (CONST_OK_FOR_LETTER_P) && ! defined (CONST_OK_FOR_CONSTRAINT_P)
1021 #define CONST_OK_FOR_CONSTRAINT_P(VAL,C,STR) CONST_OK_FOR_LETTER_P (VAL, C)
1022 #endif
1023
1024 #if defined (CONST_DOUBLE_OK_FOR_LETTER_P) && ! defined (CONST_DOUBLE_OK_FOR_CONSTRAINT_P)
1025 #define CONST_DOUBLE_OK_FOR_CONSTRAINT_P(OP,C,STR) \
1026   CONST_DOUBLE_OK_FOR_LETTER_P (OP, C)
1027 #endif
1028
1029 #ifndef REG_CLASS_FROM_CONSTRAINT
1030 #define REG_CLASS_FROM_CONSTRAINT(C,STR) REG_CLASS_FROM_LETTER (C)
1031 #endif
1032
1033 #if defined (EXTRA_CONSTRAINT) && ! defined (EXTRA_CONSTRAINT_STR)
1034 #define EXTRA_CONSTRAINT_STR(OP, C,STR) EXTRA_CONSTRAINT (OP, C)
1035 #endif
1036
1037 #endif /* old constraint mechanism in use */
1038
1039 /* Determin whether the target runtime library is Bionic */
1040 #ifndef TARGET_HAS_BIONIC
1041 #define TARGET_HAS_BIONIC 0
1042 #endif
1043
1044 /* Indicate that CLZ and CTZ are undefined at zero.  */
1045 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
1046 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
1047 #endif
1048 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
1049 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
1050 #endif
1051
1052 /* Provide a default value for STORE_FLAG_VALUE.  */
1053 #ifndef STORE_FLAG_VALUE
1054 #define STORE_FLAG_VALUE  1
1055 #endif
1056
1057 /* This macro is used to determine what the largest unit size that
1058    move_by_pieces can use is.  */
1059
1060 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
1061    move efficiently, as opposed to  MOVE_MAX which is the maximum
1062    number of bytes we can move with a single instruction.  */
1063
1064 #ifndef MOVE_MAX_PIECES
1065 #define MOVE_MAX_PIECES   MOVE_MAX
1066 #endif
1067
1068 #ifndef MAX_MOVE_MAX
1069 #define MAX_MOVE_MAX MOVE_MAX
1070 #endif
1071
1072 #ifndef MIN_UNITS_PER_WORD
1073 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
1074 #endif
1075
1076 #ifndef MAX_BITS_PER_WORD
1077 #define MAX_BITS_PER_WORD BITS_PER_WORD
1078 #endif
1079
1080 #ifndef STACK_POINTER_OFFSET
1081 #define STACK_POINTER_OFFSET    0
1082 #endif
1083
1084 #ifndef LOCAL_REGNO
1085 #define LOCAL_REGNO(REGNO)  0
1086 #endif
1087
1088 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1089    the stack pointer does not matter.  The value is tested only in
1090    functions that have frame pointers.  */
1091 #ifndef EXIT_IGNORE_STACK
1092 #define EXIT_IGNORE_STACK 0
1093 #endif
1094
1095 /* Assume that case vectors are not pc-relative.  */
1096 #ifndef CASE_VECTOR_PC_RELATIVE
1097 #define CASE_VECTOR_PC_RELATIVE 0
1098 #endif
1099
1100 /* Assume that trampolines need function alignment.  */
1101 #ifndef TRAMPOLINE_ALIGNMENT
1102 #define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY
1103 #endif
1104
1105 /* Register mappings for target machines without register windows.  */
1106 #ifndef INCOMING_REGNO
1107 #define INCOMING_REGNO(N) (N)
1108 #endif
1109
1110 #ifndef OUTGOING_REGNO
1111 #define OUTGOING_REGNO(N) (N)
1112 #endif
1113
1114 #ifndef SHIFT_COUNT_TRUNCATED
1115 #define SHIFT_COUNT_TRUNCATED 0
1116 #endif
1117
1118 #ifndef LEGITIMATE_PIC_OPERAND_P
1119 #define LEGITIMATE_PIC_OPERAND_P(X) 1
1120 #endif
1121
1122 #ifndef TARGET_MEM_CONSTRAINT
1123 #define TARGET_MEM_CONSTRAINT 'm'
1124 #endif
1125
1126 #ifndef REVERSIBLE_CC_MODE
1127 #define REVERSIBLE_CC_MODE(MODE) 0
1128 #endif
1129
1130 /* Biggest alignment supported by the object file format of this machine.  */
1131 #ifndef MAX_OFILE_ALIGNMENT
1132 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
1133 #endif
1134
1135 #ifndef FRAME_GROWS_DOWNWARD
1136 #define FRAME_GROWS_DOWNWARD 0
1137 #endif
1138
1139 /* On most machines, the CFA coincides with the first incoming parm.  */
1140 #ifndef ARG_POINTER_CFA_OFFSET
1141 #define ARG_POINTER_CFA_OFFSET(FNDECL) \
1142   (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
1143 #endif
1144
1145 /* On most machines, we use the CFA as DW_AT_frame_base.  */
1146 #ifndef CFA_FRAME_BASE_OFFSET
1147 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0
1148 #endif
1149
1150 /* The offset from the incoming value of %sp to the top of the stack frame
1151    for the current function.  */
1152 #ifndef INCOMING_FRAME_SP_OFFSET
1153 #define INCOMING_FRAME_SP_OFFSET 0
1154 #endif
1155
1156 #ifndef HARD_REGNO_NREGS_HAS_PADDING
1157 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
1158 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
1159 #endif
1160
1161 #ifndef OUTGOING_REG_PARM_STACK_SPACE
1162 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
1163 #endif
1164
1165 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
1166    the backend.  MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
1167    effort stack alignment supported by the backend.  If the backend
1168    supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
1169    MAX_STACK_ALIGNMENT are the same.  Otherwise, the incoming stack
1170    boundary will limit the maximum guaranteed stack alignment.  */
1171 #ifdef MAX_STACK_ALIGNMENT
1172 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
1173 #else
1174 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY
1175 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
1176 #endif
1177
1178 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
1179
1180 #ifndef LOCAL_ALIGNMENT
1181 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
1182 #endif
1183
1184 #ifndef STACK_SLOT_ALIGNMENT
1185 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
1186   ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
1187 #endif
1188
1189 #ifndef LOCAL_DECL_ALIGNMENT
1190 #define LOCAL_DECL_ALIGNMENT(DECL) \
1191   LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
1192 #endif
1193
1194 #ifndef MINIMUM_ALIGNMENT
1195 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN)
1196 #endif
1197
1198 /* Alignment value for attribute ((aligned)).  */
1199 #ifndef ATTRIBUTE_ALIGNED_VALUE
1200 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
1201 #endif
1202
1203 #ifndef SLOW_UNALIGNED_ACCESS
1204 #define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) STRICT_ALIGNMENT
1205 #endif
1206
1207 /* For most ports anything that evaluates to a constant symbolic
1208    or integer value is acceptable as a constant address.  */
1209 #ifndef CONSTANT_ADDRESS_P
1210 #define CONSTANT_ADDRESS_P(X)   (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE)
1211 #endif
1212
1213 #ifndef MAX_FIXED_MODE_SIZE
1214 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
1215 #endif
1216
1217 /* Nonzero if structures and unions should be returned in memory.
1218
1219    This should only be defined if compatibility with another compiler or
1220    with an ABI is needed, because it results in slower code.  */
1221
1222 #ifndef DEFAULT_PCC_STRUCT_RETURN
1223 #define DEFAULT_PCC_STRUCT_RETURN 1
1224 #endif
1225
1226 #ifdef GCC_INSN_FLAGS_H
1227 /* Dependent default target macro definitions
1228
1229    This section of defaults.h defines target macros that depend on generated
1230    headers.  This is a bit awkward:  We want to put all default definitions
1231    for target macros in defaults.h, but some of the defaults depend on the
1232    HAVE_* flags defines of insn-flags.h.  But insn-flags.h is not always
1233    included by files that do include defaults.h.
1234
1235    Fortunately, the default macro definitions that depend on the HAVE_*
1236    macros are also the ones that will only be used inside GCC itself, i.e.
1237    not in the gen* programs or in target objects like libgcc.
1238
1239    Obviously, it would be best to keep this section of defaults.h as small
1240    as possible, by converting the macros defined below to target hooks or
1241    functions.
1242 */
1243
1244 /* The default branch cost is 1.  */
1245 #ifndef BRANCH_COST
1246 #define BRANCH_COST(speed_p, predictable_p) 1
1247 #endif
1248
1249 /* If a memory-to-memory move would take MOVE_RATIO or more simple
1250    move-instruction sequences, we will do a movmem or libcall instead.  */
1251
1252 #ifndef MOVE_RATIO
1253 #if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti)
1254 #define MOVE_RATIO(speed) 2
1255 #else
1256 /* If we are optimizing for space (-Os), cut down the default move ratio.  */
1257 #define MOVE_RATIO(speed) ((speed) ? 15 : 3)
1258 #endif
1259 #endif
1260
1261 /* If a clear memory operation would take CLEAR_RATIO or more simple
1262    move-instruction sequences, we will do a setmem or libcall instead.  */
1263
1264 #ifndef CLEAR_RATIO
1265 #if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
1266 #define CLEAR_RATIO(speed) 2
1267 #else
1268 /* If we are optimizing for space, cut down the default clear ratio.  */
1269 #define CLEAR_RATIO(speed) ((speed) ? 15 :3)
1270 #endif
1271 #endif
1272
1273 /* If a memory set (to value other than zero) operation would take
1274    SET_RATIO or more simple move-instruction sequences, we will do a movmem
1275    or libcall instead.  */
1276 #ifndef SET_RATIO
1277 #define SET_RATIO(speed) MOVE_RATIO (speed)
1278 #endif
1279
1280 /* Supply a default definition for FUNCTION_ARG_PADDING:
1281    usually pad upward, but pad short args downward on
1282    big-endian machines.  */
1283
1284 #define DEFAULT_FUNCTION_ARG_PADDING(MODE, TYPE)                        \
1285   (! BYTES_BIG_ENDIAN                                                   \
1286    ? upward                                                             \
1287    : (((MODE) == BLKmode                                                \
1288        ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST         \
1289           && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \
1290        : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY)                       \
1291       ? downward : upward))
1292
1293 #ifndef FUNCTION_ARG_PADDING
1294 #define FUNCTION_ARG_PADDING(MODE, TYPE)        \
1295   DEFAULT_FUNCTION_ARG_PADDING ((MODE), (TYPE))
1296 #endif
1297
1298 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
1299    Normally move_insn, so Pmode stack pointer.  */
1300
1301 #ifndef STACK_SAVEAREA_MODE
1302 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
1303 #endif
1304
1305 /* Supply a default definition of STACK_SIZE_MODE for
1306    allocate_dynamic_stack_space.  Normally PLUS/MINUS, so word_mode.  */
1307
1308 #ifndef STACK_SIZE_MODE
1309 #define STACK_SIZE_MODE word_mode
1310 #endif
1311
1312 /* Provide default values for the macros controlling stack checking.  */
1313
1314 /* The default is neither full builtin stack checking...  */
1315 #ifndef STACK_CHECK_BUILTIN
1316 #define STACK_CHECK_BUILTIN 0
1317 #endif
1318
1319 /* ...nor static builtin stack checking.  */
1320 #ifndef STACK_CHECK_STATIC_BUILTIN
1321 #define STACK_CHECK_STATIC_BUILTIN 0
1322 #endif
1323
1324 /* The default interval is one page (4096 bytes).  */
1325 #ifndef STACK_CHECK_PROBE_INTERVAL_EXP
1326 #define STACK_CHECK_PROBE_INTERVAL_EXP 12
1327 #endif
1328
1329 /* The default is not to move the stack pointer.  */
1330 #ifndef STACK_CHECK_MOVING_SP
1331 #define STACK_CHECK_MOVING_SP 0
1332 #endif
1333
1334 /* This is a kludge to try to capture the discrepancy between the old
1335    mechanism (generic stack checking) and the new mechanism (static
1336    builtin stack checking).  STACK_CHECK_PROTECT needs to be bumped
1337    for the latter because part of the protection area is effectively
1338    included in STACK_CHECK_MAX_FRAME_SIZE for the former.  */
1339 #ifdef STACK_CHECK_PROTECT
1340 #define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
1341 #else
1342 #define STACK_OLD_CHECK_PROTECT                                         \
1343  (targetm_common.except_unwind_info (&global_options) == UI_SJLJ        \
1344   ? 75 * UNITS_PER_WORD                                                 \
1345   : 8 * 1024)
1346 #endif
1347
1348 /* Minimum amount of stack required to recover from an anticipated stack
1349    overflow detection.  The default value conveys an estimate of the amount
1350    of stack required to propagate an exception.  */
1351 #ifndef STACK_CHECK_PROTECT
1352 #define STACK_CHECK_PROTECT                                             \
1353  (targetm_common.except_unwind_info (&global_options) == UI_SJLJ        \
1354   ? 75 * UNITS_PER_WORD                                                 \
1355   : 12 * 1024)
1356 #endif
1357
1358 /* Make the maximum frame size be the largest we can and still only need
1359    one probe per function.  */
1360 #ifndef STACK_CHECK_MAX_FRAME_SIZE
1361 #define STACK_CHECK_MAX_FRAME_SIZE \
1362   ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD)
1363 #endif
1364
1365 /* This is arbitrary, but should be large enough everywhere.  */
1366 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
1367 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
1368 #endif
1369
1370 /* Provide a reasonable default for the maximum size of an object to
1371    allocate in the fixed frame.  We may need to be able to make this
1372    controllable by the user at some point.  */
1373 #ifndef STACK_CHECK_MAX_VAR_SIZE
1374 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
1375 #endif
1376
1377 /* By default, the C++ compiler will use function addresses in the
1378    vtable entries.  Setting this nonzero tells the compiler to use
1379    function descriptors instead.  The value of this macro says how
1380    many words wide the descriptor is (normally 2).  It is assumed
1381    that the address of a function descriptor may be treated as a
1382    pointer to a function.  */
1383 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
1384 #define TARGET_VTABLE_USES_DESCRIPTORS 0
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 */