gcc/defaults.h

   1 /* Definitions of various defaults for tm.h macros.
   2    Copyright (C) 1992-2015 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 /* The mapping from dwarf CFA reg number to internal dwarf reg numbers.  */
 442 #ifndef DWARF_REG_TO_UNWIND_COLUMN
 443 #define DWARF_REG_TO_UNWIND_COLUMN(REGNO) (REGNO)
 444 #endif
 445
 446 /* Map register numbers held in the call frame info that gcc has
 447    collected using DWARF_FRAME_REGNUM to those that should be output in
 448    .debug_frame and .eh_frame.  */
 449 #ifndef DWARF2_FRAME_REG_OUT
 450 #define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) (REGNO)
 451 #endif
 452
 453 /* The size of addresses as they appear in the Dwarf 2 data.
 454    Some architectures use word addresses to refer to code locations,
 455    but Dwarf 2 info always uses byte addresses.  On such machines,
 456    Dwarf 2 addresses need to be larger than the architecture's
 457    pointers.  */
 458 #ifndef DWARF2_ADDR_SIZE
 459 #define DWARF2_ADDR_SIZE ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)
 460 #endif
 461
 462 /* The size in bytes of a DWARF field indicating an offset or length
 463    relative to a debug info section, specified to be 4 bytes in the
 464    DWARF-2 specification.  The SGI/MIPS ABI defines it to be the same
 465    as PTR_SIZE.  */
 466 #ifndef DWARF_OFFSET_SIZE
 467 #define DWARF_OFFSET_SIZE 4
 468 #endif
 469
 470 /* The size in bytes of a DWARF 4 type signature.  */
 471 #ifndef DWARF_TYPE_SIGNATURE_SIZE
 472 #define DWARF_TYPE_SIGNATURE_SIZE 8
 473 #endif
 474
 475 /* Default sizes for base C types.  If the sizes are different for
 476    your target, you should override these values by defining the
 477    appropriate symbols in your tm.h file.  */
 478
 479 #if BITS_PER_UNIT == 8
 480 #define LOG2_BITS_PER_UNIT 3
 481 #elif BITS_PER_UNIT == 16
 482 #define LOG2_BITS_PER_UNIT 4
 483 #else
 484 #error Unknown BITS_PER_UNIT
 485 #endif
 486
 487 #ifndef BITS_PER_WORD
 488 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
 489 #endif
 490
 491 #ifndef CHAR_TYPE_SIZE
 492 #define CHAR_TYPE_SIZE BITS_PER_UNIT
 493 #endif
 494
 495 #ifndef BOOL_TYPE_SIZE
 496 /* `bool' has size and alignment `1', on almost all platforms.  */
 497 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
 498 #endif
 499
 500 #ifndef SHORT_TYPE_SIZE
 501 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
 502 #endif
 503
 504 #ifndef INT_TYPE_SIZE
 505 #define INT_TYPE_SIZE BITS_PER_WORD
 506 #endif
 507
 508 #ifndef LONG_TYPE_SIZE
 509 #define LONG_TYPE_SIZE BITS_PER_WORD
 510 #endif
 511
 512 #ifndef LONG_LONG_TYPE_SIZE
 513 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
 514 #endif
 515
 516 #ifndef WCHAR_TYPE_SIZE
 517 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
 518 #endif
 519
 520 #ifndef FLOAT_TYPE_SIZE
 521 #define FLOAT_TYPE_SIZE BITS_PER_WORD
 522 #endif
 523
 524 #ifndef DOUBLE_TYPE_SIZE
 525 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 526 #endif
 527
 528 #ifndef LONG_DOUBLE_TYPE_SIZE
 529 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 530 #endif
 531
 532 #ifndef DECIMAL32_TYPE_SIZE
 533 #define DECIMAL32_TYPE_SIZE 32
 534 #endif
 535
 536 #ifndef DECIMAL64_TYPE_SIZE
 537 #define DECIMAL64_TYPE_SIZE 64
 538 #endif
 539
 540 #ifndef DECIMAL128_TYPE_SIZE
 541 #define DECIMAL128_TYPE_SIZE 128
 542 #endif
 543
 544 #ifndef SHORT_FRACT_TYPE_SIZE
 545 #define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT
 546 #endif
 547
 548 #ifndef FRACT_TYPE_SIZE
 549 #define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2)
 550 #endif
 551
 552 #ifndef LONG_FRACT_TYPE_SIZE
 553 #define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4)
 554 #endif
 555
 556 #ifndef LONG_LONG_FRACT_TYPE_SIZE
 557 #define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8)
 558 #endif
 559
 560 #ifndef SHORT_ACCUM_TYPE_SIZE
 561 #define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2)
 562 #endif
 563
 564 #ifndef ACCUM_TYPE_SIZE
 565 #define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2)
 566 #endif
 567
 568 #ifndef LONG_ACCUM_TYPE_SIZE
 569 #define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2)
 570 #endif
 571
 572 #ifndef LONG_LONG_ACCUM_TYPE_SIZE
 573 #define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2)
 574 #endif
 575
 576 /* We let tm.h override the types used here, to handle trivial differences
 577    such as the choice of unsigned int or long unsigned int for size_t.
 578    When machines start needing nontrivial differences in the size type,
 579    it would be best to do something here to figure out automatically
 580    from other information what type to use.  */
 581
 582 #ifndef SIZE_TYPE
 583 #define SIZE_TYPE "long unsigned int"
 584 #endif
 585
 586 #ifndef SIZETYPE
 587 #define SIZETYPE SIZE_TYPE
 588 #endif
 589
 590 #ifndef PID_TYPE
 591 #define PID_TYPE "int"
 592 #endif
 593
 594 /* If GCC knows the exact uint_least16_t and uint_least32_t types from
 595    <stdint.h>, use them for char16_t and char32_t.  Otherwise, use
 596    these guesses; getting the wrong type of a given width will not
 597    affect C++ name mangling because in C++ these are distinct types
 598    not typedefs.  */
 599
 600 #ifdef UINT_LEAST16_TYPE
 601 #define CHAR16_TYPE UINT_LEAST16_TYPE
 602 #else
 603 #define CHAR16_TYPE "short unsigned int"
 604 #endif
 605
 606 #ifdef UINT_LEAST32_TYPE
 607 #define CHAR32_TYPE UINT_LEAST32_TYPE
 608 #else
 609 #define CHAR32_TYPE "unsigned int"
 610 #endif
 611
 612 #ifndef WCHAR_TYPE
 613 #define WCHAR_TYPE "int"
 614 #endif
 615
 616 /* WCHAR_TYPE gets overridden by -fshort-wchar.  */
 617 #define MODIFIED_WCHAR_TYPE \
 618         (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE)
 619
 620 #ifndef PTRDIFF_TYPE
 621 #define PTRDIFF_TYPE "long int"
 622 #endif
 623
 624 #ifndef WINT_TYPE
 625 #define WINT_TYPE "unsigned int"
 626 #endif
 627
 628 #ifndef INTMAX_TYPE
 629 #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)     \
 630                      ? "int"                                    \
 631                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 632                         ? "long int"                            \
 633                         : "long long int"))
 634 #endif
 635
 636 #ifndef UINTMAX_TYPE
 637 #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)    \
 638                      ? "unsigned int"                           \
 639                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 640                         ? "long unsigned int"                   \
 641                         : "long long unsigned int"))
 642 #endif
 643
 644
 645 /* There are no default definitions of these <stdint.h> types.  */
 646
 647 #ifndef SIG_ATOMIC_TYPE
 648 #define SIG_ATOMIC_TYPE ((const char *) NULL)
 649 #endif
 650
 651 #ifndef INT8_TYPE
 652 #define INT8_TYPE ((const char *) NULL)
 653 #endif
 654
 655 #ifndef INT16_TYPE
 656 #define INT16_TYPE ((const char *) NULL)
 657 #endif
 658
 659 #ifndef INT32_TYPE
 660 #define INT32_TYPE ((const char *) NULL)
 661 #endif
 662
 663 #ifndef INT64_TYPE
 664 #define INT64_TYPE ((const char *) NULL)
 665 #endif
 666
 667 #ifndef UINT8_TYPE
 668 #define UINT8_TYPE ((const char *) NULL)
 669 #endif
 670
 671 #ifndef UINT16_TYPE
 672 #define UINT16_TYPE ((const char *) NULL)
 673 #endif
 674
 675 #ifndef UINT32_TYPE
 676 #define UINT32_TYPE ((const char *) NULL)
 677 #endif
 678
 679 #ifndef UINT64_TYPE
 680 #define UINT64_TYPE ((const char *) NULL)
 681 #endif
 682
 683 #ifndef INT_LEAST8_TYPE
 684 #define INT_LEAST8_TYPE ((const char *) NULL)
 685 #endif
 686
 687 #ifndef INT_LEAST16_TYPE
 688 #define INT_LEAST16_TYPE ((const char *) NULL)
 689 #endif
 690
 691 #ifndef INT_LEAST32_TYPE
 692 #define INT_LEAST32_TYPE ((const char *) NULL)
 693 #endif
 694
 695 #ifndef INT_LEAST64_TYPE
 696 #define INT_LEAST64_TYPE ((const char *) NULL)
 697 #endif
 698
 699 #ifndef UINT_LEAST8_TYPE
 700 #define UINT_LEAST8_TYPE ((const char *) NULL)
 701 #endif
 702
 703 #ifndef UINT_LEAST16_TYPE
 704 #define UINT_LEAST16_TYPE ((const char *) NULL)
 705 #endif
 706
 707 #ifndef UINT_LEAST32_TYPE
 708 #define UINT_LEAST32_TYPE ((const char *) NULL)
 709 #endif
 710
 711 #ifndef UINT_LEAST64_TYPE
 712 #define UINT_LEAST64_TYPE ((const char *) NULL)
 713 #endif
 714
 715 #ifndef INT_FAST8_TYPE
 716 #define INT_FAST8_TYPE ((const char *) NULL)
 717 #endif
 718
 719 #ifndef INT_FAST16_TYPE
 720 #define INT_FAST16_TYPE ((const char *) NULL)
 721 #endif
 722
 723 #ifndef INT_FAST32_TYPE
 724 #define INT_FAST32_TYPE ((const char *) NULL)
 725 #endif
 726
 727 #ifndef INT_FAST64_TYPE
 728 #define INT_FAST64_TYPE ((const char *) NULL)
 729 #endif
 730
 731 #ifndef UINT_FAST8_TYPE
 732 #define UINT_FAST8_TYPE ((const char *) NULL)
 733 #endif
 734
 735 #ifndef UINT_FAST16_TYPE
 736 #define UINT_FAST16_TYPE ((const char *) NULL)
 737 #endif
 738
 739 #ifndef UINT_FAST32_TYPE
 740 #define UINT_FAST32_TYPE ((const char *) NULL)
 741 #endif
 742
 743 #ifndef UINT_FAST64_TYPE
 744 #define UINT_FAST64_TYPE ((const char *) NULL)
 745 #endif
 746
 747 #ifndef INTPTR_TYPE
 748 #define INTPTR_TYPE ((const char *) NULL)
 749 #endif
 750
 751 #ifndef UINTPTR_TYPE
 752 #define UINTPTR_TYPE ((const char *) NULL)
 753 #endif
 754
 755 /* Width in bits of a pointer.  Mind the value of the macro `Pmode'.  */
 756 #ifndef POINTER_SIZE
 757 #define POINTER_SIZE BITS_PER_WORD
 758 #endif
 759 #ifndef POINTER_SIZE_UNITS
 760 #define POINTER_SIZE_UNITS ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)
 761 #endif
 762
 763
 764 #ifndef PIC_OFFSET_TABLE_REGNUM
 765 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
 766 #endif
 767
 768 #ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
 769 #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 0
 770 #endif
 771
 772 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
 773 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
 774 #endif
 775
 776 #ifndef TARGET_DECLSPEC
 777 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
 778 /* If the target supports the "dllimport" attribute, users are
 779    probably used to the "__declspec" syntax.  */
 780 #define TARGET_DECLSPEC 1
 781 #else
 782 #define TARGET_DECLSPEC 0
 783 #endif
 784 #endif
 785
 786 /* By default, the preprocessor should be invoked the same way in C++
 787    as in C.  */
 788 #ifndef CPLUSPLUS_CPP_SPEC
 789 #ifdef CPP_SPEC
 790 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
 791 #endif
 792 #endif
 793
 794 #ifndef ACCUMULATE_OUTGOING_ARGS
 795 #define ACCUMULATE_OUTGOING_ARGS 0
 796 #endif
 797
 798 /* By default, use the GNU runtime for Objective C.  */
 799 #ifndef NEXT_OBJC_RUNTIME
 800 #define NEXT_OBJC_RUNTIME 0
 801 #endif
 802
 803 /* Supply a default definition for PUSH_ARGS.  */
 804 #ifndef PUSH_ARGS
 805 #ifdef PUSH_ROUNDING
 806 #define PUSH_ARGS       !ACCUMULATE_OUTGOING_ARGS
 807 #else
 808 #define PUSH_ARGS       0
 809 #endif
 810 #endif
 811
 812 /* Decide whether a function's arguments should be processed
 813    from first to last or from last to first.
 814
 815    They should if the stack and args grow in opposite directions, but
 816    only if we have push insns.  */
 817
 818 #ifdef PUSH_ROUNDING
 819
 820 #ifndef PUSH_ARGS_REVERSED
 821 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
 822 #define PUSH_ARGS_REVERSED  PUSH_ARGS
 823 #endif
 824 #endif
 825
 826 #endif
 827
 828 #ifndef PUSH_ARGS_REVERSED
 829 #define PUSH_ARGS_REVERSED 0
 830 #endif
 831
 832 /* Default value for the alignment (in bits) a C conformant malloc has to
 833    provide. This default is intended to be safe and always correct.  */
 834 #ifndef MALLOC_ABI_ALIGNMENT
 835 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
 836 #endif
 837
 838 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
 839    STACK_BOUNDARY is required.  */
 840 #ifndef PREFERRED_STACK_BOUNDARY
 841 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
 842 #endif
 843
 844 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not
 845    defined.  */
 846 #ifndef INCOMING_STACK_BOUNDARY
 847 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY
 848 #endif
 849
 850 #ifndef TARGET_DEFAULT_PACK_STRUCT
 851 #define TARGET_DEFAULT_PACK_STRUCT 0
 852 #endif
 853
 854 /* By default, the vtable entries are void pointers, the so the alignment
 855    is the same as pointer alignment.  The value of this macro specifies
 856    the alignment of the vtable entry in bits.  It should be defined only
 857    when special alignment is necessary.  */
 858 #ifndef TARGET_VTABLE_ENTRY_ALIGN
 859 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
 860 #endif
 861
 862 /* There are a few non-descriptor entries in the vtable at offsets below
 863    zero.  If these entries must be padded (say, to preserve the alignment
 864    specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
 865    words in each data entry.  */
 866 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
 867 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
 868 #endif
 869
 870 /* Decide whether it is safe to use a local alias for a virtual function
 871    when constructing thunks.  */
 872 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
 873 #ifdef ASM_OUTPUT_DEF
 874 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
 875 #else
 876 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
 877 #endif
 878 #endif
 879
 880 /* Select a format to encode pointers in exception handling data.  We
 881    prefer those that result in fewer dynamic relocations.  Assume no
 882    special support here and encode direct references.  */
 883 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
 884 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  DW_EH_PE_absptr
 885 #endif
 886
 887 /* By default, the C++ compiler will use the lowest bit of the pointer
 888    to function to indicate a pointer-to-member-function points to a
 889    virtual member function.  However, if FUNCTION_BOUNDARY indicates
 890    function addresses aren't always even, the lowest bit of the delta
 891    field will be used.  */
 892 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
 893 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
 894   (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
 895    ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
 896 #endif
 897
 898 #ifndef DEFAULT_GDB_EXTENSIONS
 899 #define DEFAULT_GDB_EXTENSIONS 1
 900 #endif
 901
 902 /* If more than one debugging type is supported, you must define
 903    PREFERRED_DEBUGGING_TYPE to choose the default.  */
 904
 905 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
 906          + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
 907          + defined (VMS_DEBUGGING_INFO))
 908 #ifndef PREFERRED_DEBUGGING_TYPE
 909 #error You must define PREFERRED_DEBUGGING_TYPE
 910 #endif /* no PREFERRED_DEBUGGING_TYPE */
 911
 912 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
 913    here so other code needn't care.  */
 914 #elif defined DBX_DEBUGGING_INFO
 915 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 916
 917 #elif defined SDB_DEBUGGING_INFO
 918 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
 919
 920 #elif defined DWARF2_DEBUGGING_INFO
 921 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 922
 923 #elif defined VMS_DEBUGGING_INFO
 924 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
 925
 926 #elif defined XCOFF_DEBUGGING_INFO
 927 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
 928
 929 #else
 930 /* No debugging format is supported by this target.  */
 931 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
 932 #endif
 933
 934 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
 935 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
 936 #endif
 937
 938 /* True if the targets integer-comparison functions return { 0, 1, 2
 939    } to indicate { <, ==, > }.  False if { -1, 0, 1 } is used
 940    instead.  The libgcc routines are biased.  */
 941 #ifndef TARGET_LIB_INT_CMP_BIASED
 942 #define TARGET_LIB_INT_CMP_BIASED (true)
 943 #endif
 944
 945 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
 946    then the word-endianness is the same as for integers.  */
 947 #ifndef FLOAT_WORDS_BIG_ENDIAN
 948 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 949 #endif
 950
 951 #ifndef REG_WORDS_BIG_ENDIAN
 952 #define REG_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 953 #endif
 954
 955 #ifdef TARGET_FLT_EVAL_METHOD
 956 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 1
 957 #else
 958 #define TARGET_FLT_EVAL_METHOD 0
 959 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 0
 960 #endif
 961
 962 #ifndef TARGET_DEC_EVAL_METHOD
 963 #define TARGET_DEC_EVAL_METHOD 2
 964 #endif
 965
 966 #ifndef HAS_LONG_COND_BRANCH
 967 #define HAS_LONG_COND_BRANCH 0
 968 #endif
 969
 970 #ifndef HAS_LONG_UNCOND_BRANCH
 971 #define HAS_LONG_UNCOND_BRANCH 0
 972 #endif
 973
 974 /* Determine whether __cxa_atexit, rather than atexit, is used to
 975    register C++ destructors for local statics and global objects.  */
 976 #ifndef DEFAULT_USE_CXA_ATEXIT
 977 #define DEFAULT_USE_CXA_ATEXIT 0
 978 #endif
 979
 980 #if GCC_VERSION >= 3000 && defined IN_GCC
 981 /* These old constraint macros shouldn't appear anywhere in a
 982    configuration using MD constraint definitions.  */
 983 #endif
 984
 985 /* Determin whether the target runtime library is Bionic */
 986 #ifndef TARGET_HAS_BIONIC
 987 #define TARGET_HAS_BIONIC 0
 988 #endif
 989
 990 /* Indicate that CLZ and CTZ are undefined at zero.  */
 991 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
 992 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
 993 #endif
 994 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
 995 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
 996 #endif
 997
 998 /* Provide a default value for STORE_FLAG_VALUE.  */
 999 #ifndef STORE_FLAG_VALUE
1000 #define STORE_FLAG_VALUE  1
1001 #endif
1002
1003 /* This macro is used to determine what the largest unit size that
1004    move_by_pieces can use is.  */
1005
1006 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
1007    move efficiently, as opposed to  MOVE_MAX which is the maximum
1008    number of bytes we can move with a single instruction.  */
1009
1010 #ifndef MOVE_MAX_PIECES
1011 #define MOVE_MAX_PIECES   MOVE_MAX
1012 #endif
1013
1014 /* STORE_MAX_PIECES is the number of bytes at a time that we can
1015    store efficiently.  Due to internal GCC limitations, this is
1016    MOVE_MAX_PIECES limited by the number of bytes GCC can represent
1017    for an immediate constant.  */
1018
1019 #ifndef STORE_MAX_PIECES
1020 #define STORE_MAX_PIECES  MIN (MOVE_MAX_PIECES, 2 * sizeof (HOST_WIDE_INT))
1021 #endif
1022
1023 #ifndef MAX_MOVE_MAX
1024 #define MAX_MOVE_MAX MOVE_MAX
1025 #endif
1026
1027 #ifndef MIN_UNITS_PER_WORD
1028 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
1029 #endif
1030
1031 #ifndef MAX_BITS_PER_WORD
1032 #define MAX_BITS_PER_WORD BITS_PER_WORD
1033 #endif
1034
1035 #ifndef STACK_POINTER_OFFSET
1036 #define STACK_POINTER_OFFSET    0
1037 #endif
1038
1039 #ifndef LOCAL_REGNO
1040 #define LOCAL_REGNO(REGNO)  0
1041 #endif
1042
1043 #ifndef HONOR_REG_ALLOC_ORDER
1044 #define HONOR_REG_ALLOC_ORDER 0
1045 #endif
1046
1047 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1048    the stack pointer does not matter.  The value is tested only in
1049    functions that have frame pointers.  */
1050 #ifndef EXIT_IGNORE_STACK
1051 #define EXIT_IGNORE_STACK 0
1052 #endif
1053
1054 /* Assume that case vectors are not pc-relative.  */
1055 #ifndef CASE_VECTOR_PC_RELATIVE
1056 #define CASE_VECTOR_PC_RELATIVE 0
1057 #endif
1058
1059 /* Assume that trampolines need function alignment.  */
1060 #ifndef TRAMPOLINE_ALIGNMENT
1061 #define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY
1062 #endif
1063
1064 /* Register mappings for target machines without register windows.  */
1065 #ifndef INCOMING_REGNO
1066 #define INCOMING_REGNO(N) (N)
1067 #endif
1068
1069 #ifndef OUTGOING_REGNO
1070 #define OUTGOING_REGNO(N) (N)
1071 #endif
1072
1073 #ifndef SHIFT_COUNT_TRUNCATED
1074 #define SHIFT_COUNT_TRUNCATED 0
1075 #endif
1076
1077 #ifndef LEGITIMATE_PIC_OPERAND_P
1078 #define LEGITIMATE_PIC_OPERAND_P(X) 1
1079 #endif
1080
1081 #ifndef TARGET_MEM_CONSTRAINT
1082 #define TARGET_MEM_CONSTRAINT 'm'
1083 #endif
1084
1085 #ifndef REVERSIBLE_CC_MODE
1086 #define REVERSIBLE_CC_MODE(MODE) 0
1087 #endif
1088
1089 /* Biggest alignment supported by the object file format of this machine.  */
1090 #ifndef MAX_OFILE_ALIGNMENT
1091 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
1092 #endif
1093
1094 #ifndef FRAME_GROWS_DOWNWARD
1095 #define FRAME_GROWS_DOWNWARD 0
1096 #endif
1097
1098 #ifndef RETURN_ADDR_IN_PREVIOUS_FRAME
1099 #define RETURN_ADDR_IN_PREVIOUS_FRAME 0
1100 #endif
1101
1102 /* On most machines, the CFA coincides with the first incoming parm.  */
1103 #ifndef ARG_POINTER_CFA_OFFSET
1104 #define ARG_POINTER_CFA_OFFSET(FNDECL) \
1105   (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
1106 #endif
1107
1108 /* On most machines, we use the CFA as DW_AT_frame_base.  */
1109 #ifndef CFA_FRAME_BASE_OFFSET
1110 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0
1111 #endif
1112
1113 /* The offset from the incoming value of %sp to the top of the stack frame
1114    for the current function.  */
1115 #ifndef INCOMING_FRAME_SP_OFFSET
1116 #define INCOMING_FRAME_SP_OFFSET 0
1117 #endif
1118
1119 #ifndef HARD_REGNO_NREGS_HAS_PADDING
1120 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
1121 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
1122 #endif
1123
1124 #ifndef OUTGOING_REG_PARM_STACK_SPACE
1125 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
1126 #endif
1127
1128 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
1129    the backend.  MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
1130    effort stack alignment supported by the backend.  If the backend
1131    supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
1132    MAX_STACK_ALIGNMENT are the same.  Otherwise, the incoming stack
1133    boundary will limit the maximum guaranteed stack alignment.  */
1134 #ifdef MAX_STACK_ALIGNMENT
1135 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
1136 #else
1137 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY
1138 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
1139 #endif
1140
1141 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
1142
1143 #ifndef LOCAL_ALIGNMENT
1144 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
1145 #endif
1146
1147 #ifndef STACK_SLOT_ALIGNMENT
1148 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
1149   ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
1150 #endif
1151
1152 #ifndef LOCAL_DECL_ALIGNMENT
1153 #define LOCAL_DECL_ALIGNMENT(DECL) \
1154   LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
1155 #endif
1156
1157 #ifndef MINIMUM_ALIGNMENT
1158 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN)
1159 #endif
1160
1161 /* Alignment value for attribute ((aligned)).  */
1162 #ifndef ATTRIBUTE_ALIGNED_VALUE
1163 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
1164 #endif
1165
1166 #ifndef SLOW_UNALIGNED_ACCESS
1167 #define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) STRICT_ALIGNMENT
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 /* The default branch cost is 1.  */
1208 #ifndef BRANCH_COST
1209 #define BRANCH_COST(speed_p, predictable_p) 1
1210 #endif
1211
1212 /* If a memory-to-memory move would take MOVE_RATIO or more simple
1213    move-instruction sequences, we will do a movmem or libcall instead.  */
1214
1215 #ifndef MOVE_RATIO
1216 #if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti)
1217 #define MOVE_RATIO(speed) 2
1218 #else
1219 /* If we are optimizing for space (-Os), cut down the default move ratio.  */
1220 #define MOVE_RATIO(speed) ((speed) ? 15 : 3)
1221 #endif
1222 #endif
1223
1224 /* If a clear memory operation would take CLEAR_RATIO or more simple
1225    move-instruction sequences, we will do a setmem or libcall instead.  */
1226
1227 #ifndef CLEAR_RATIO
1228 #if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
1229 #define CLEAR_RATIO(speed) 2
1230 #else
1231 /* If we are optimizing for space, cut down the default clear ratio.  */
1232 #define CLEAR_RATIO(speed) ((speed) ? 15 :3)
1233 #endif
1234 #endif
1235
1236 /* If a memory set (to value other than zero) operation would take
1237    SET_RATIO or more simple move-instruction sequences, we will do a movmem
1238    or libcall instead.  */
1239 #ifndef SET_RATIO
1240 #define SET_RATIO(speed) MOVE_RATIO (speed)
1241 #endif
1242
1243 /* Supply a default definition for FUNCTION_ARG_PADDING:
1244    usually pad upward, but pad short args downward on
1245    big-endian machines.  */
1246
1247 #define DEFAULT_FUNCTION_ARG_PADDING(MODE, TYPE)                        \
1248   (! BYTES_BIG_ENDIAN                                                   \
1249    ? upward                                                             \
1250    : (((MODE) == BLKmode                                                \
1251        ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST         \
1252           && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \
1253        : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY)                       \
1254       ? downward : upward))
1255
1256 #ifndef FUNCTION_ARG_PADDING
1257 #define FUNCTION_ARG_PADDING(MODE, TYPE)        \
1258   DEFAULT_FUNCTION_ARG_PADDING ((MODE), (TYPE))
1259 #endif
1260
1261 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
1262    Normally move_insn, so Pmode stack pointer.  */
1263
1264 #ifndef STACK_SAVEAREA_MODE
1265 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
1266 #endif
1267
1268 /* Supply a default definition of STACK_SIZE_MODE for
1269    allocate_dynamic_stack_space.  Normally PLUS/MINUS, so word_mode.  */
1270
1271 #ifndef STACK_SIZE_MODE
1272 #define STACK_SIZE_MODE word_mode
1273 #endif
1274
1275 /* Provide default values for the macros controlling stack checking.  */
1276
1277 /* The default is neither full builtin stack checking...  */
1278 #ifndef STACK_CHECK_BUILTIN
1279 #define STACK_CHECK_BUILTIN 0
1280 #endif
1281
1282 /* ...nor static builtin stack checking.  */
1283 #ifndef STACK_CHECK_STATIC_BUILTIN
1284 #define STACK_CHECK_STATIC_BUILTIN 0
1285 #endif
1286
1287 /* The default interval is one page (4096 bytes).  */
1288 #ifndef STACK_CHECK_PROBE_INTERVAL_EXP
1289 #define STACK_CHECK_PROBE_INTERVAL_EXP 12
1290 #endif
1291
1292 /* The default is not to move the stack pointer.  */
1293 #ifndef STACK_CHECK_MOVING_SP
1294 #define STACK_CHECK_MOVING_SP 0
1295 #endif
1296
1297 /* This is a kludge to try to capture the discrepancy between the old
1298    mechanism (generic stack checking) and the new mechanism (static
1299    builtin stack checking).  STACK_CHECK_PROTECT needs to be bumped
1300    for the latter because part of the protection area is effectively
1301    included in STACK_CHECK_MAX_FRAME_SIZE for the former.  */
1302 #ifdef STACK_CHECK_PROTECT
1303 #define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
1304 #else
1305 #define STACK_OLD_CHECK_PROTECT                                         \
1306  (targetm_common.except_unwind_info (&global_options) == UI_SJLJ        \
1307   ? 75 * UNITS_PER_WORD                                                 \
1308   : 8 * 1024)
1309 #endif
1310
1311 /* Minimum amount of stack required to recover from an anticipated stack
1312    overflow detection.  The default value conveys an estimate of the amount
1313    of stack required to propagate an exception.  */
1314 #ifndef STACK_CHECK_PROTECT
1315 #define STACK_CHECK_PROTECT                                             \
1316  (targetm_common.except_unwind_info (&global_options) == UI_SJLJ        \
1317   ? 75 * UNITS_PER_WORD                                                 \
1318   : 12 * 1024)
1319 #endif
1320
1321 /* Make the maximum frame size be the largest we can and still only need
1322    one probe per function.  */
1323 #ifndef STACK_CHECK_MAX_FRAME_SIZE
1324 #define STACK_CHECK_MAX_FRAME_SIZE \
1325   ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD)
1326 #endif
1327
1328 /* This is arbitrary, but should be large enough everywhere.  */
1329 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
1330 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
1331 #endif
1332
1333 /* Provide a reasonable default for the maximum size of an object to
1334    allocate in the fixed frame.  We may need to be able to make this
1335    controllable by the user at some point.  */
1336 #ifndef STACK_CHECK_MAX_VAR_SIZE
1337 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
1338 #endif
1339
1340 /* By default, the C++ compiler will use function addresses in the
1341    vtable entries.  Setting this nonzero tells the compiler to use
1342    function descriptors instead.  The value of this macro says how
1343    many words wide the descriptor is (normally 2).  It is assumed
1344    that the address of a function descriptor may be treated as a
1345    pointer to a function.  */
1346 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
1347 #define TARGET_VTABLE_USES_DESCRIPTORS 0
1348 #endif
1349
1350 #ifndef SWITCHABLE_TARGET
1351 #define SWITCHABLE_TARGET 0
1352 #endif
1353
1354 /* If the target supports integers that are wider than two
1355    HOST_WIDE_INTs on the host compiler, then the target should define
1356    TARGET_SUPPORTS_WIDE_INT and make the appropriate fixups.
1357    Otherwise the compiler really is not robust.  */
1358 #ifndef TARGET_SUPPORTS_WIDE_INT
1359 #define TARGET_SUPPORTS_WIDE_INT 0
1360 #endif
1361
1362 #endif /* GCC_INSN_FLAGS_H  */
1363
1364 #endif  /* ! GCC_DEFAULTS_H */