gcc/defaults.h

   1 /* Definitions of various defaults for tm.h macros.
   2    Copyright (C) 1992-2016 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_THROUGH_COLLECT2)
 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 /* Provide defaults for stuff that may not be defined when using
 381    sjlj exceptions.  */
 382 #ifndef EH_RETURN_DATA_REGNO
 383 #define EH_RETURN_DATA_REGNO(N) INVALID_REGNUM
 384 #endif
 385
 386 /* Offset between the eh handler address and entry in eh tables.  */
 387 #ifndef RETURN_ADDR_OFFSET
 388 #define RETURN_ADDR_OFFSET 0
 389 #endif
 390
 391 #ifndef MASK_RETURN_ADDR
 392 #define MASK_RETURN_ADDR NULL_RTX
 393 #endif
 394
 395 /* If we have named section and we support weak symbols, then use the
 396    .jcr section for recording java classes which need to be registered
 397    at program start-up time.  */
 398 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
 399 #ifndef JCR_SECTION_NAME
 400 #define JCR_SECTION_NAME ".jcr"
 401 #endif
 402 #endif
 403
 404 /* This decision to use a .jcr section can be overridden by defining
 405    USE_JCR_SECTION to 0 in target file.  This is necessary if target
 406    can define JCR_SECTION_NAME but does not have crtstuff or
 407    linker support for .jcr section.  */
 408 #ifndef TARGET_USE_JCR_SECTION
 409 #ifdef JCR_SECTION_NAME
 410 #define TARGET_USE_JCR_SECTION 1
 411 #else
 412 #define TARGET_USE_JCR_SECTION 0
 413 #endif
 414 #endif
 415
 416 /* Number of hardware registers that go into the DWARF-2 unwind info.
 417    If not defined, equals FIRST_PSEUDO_REGISTER  */
 418
 419 #ifndef DWARF_FRAME_REGISTERS
 420 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
 421 #endif
 422
 423 /* Offsets recorded in opcodes are a multiple of this alignment factor.  */
 424 #ifndef DWARF_CIE_DATA_ALIGNMENT
 425 #ifdef STACK_GROWS_DOWNWARD
 426 #define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD))
 427 #else
 428 #define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD)
 429 #endif
 430 #endif
 431
 432 /* The DWARF 2 CFA column which tracks the return address.  Normally this
 433    is the column for PC, or the first column after all of the hard
 434    registers.  */
 435 #ifndef DWARF_FRAME_RETURN_COLUMN
 436 #ifdef PC_REGNUM
 437 #define DWARF_FRAME_RETURN_COLUMN       DWARF_FRAME_REGNUM (PC_REGNUM)
 438 #else
 439 #define DWARF_FRAME_RETURN_COLUMN       DWARF_FRAME_REGISTERS
 440 #endif
 441 #endif
 442
 443 /* How to renumber registers for dbx and gdb.  If not defined, assume
 444    no renumbering is necessary.  */
 445
 446 #ifndef DBX_REGISTER_NUMBER
 447 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 448 #endif
 449
 450 /* The mapping from gcc register number to DWARF 2 CFA column number.
 451    By default, we just provide columns for all registers.  */
 452 #ifndef DWARF_FRAME_REGNUM
 453 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
 454 #endif
 455
 456 /* The mapping from dwarf CFA reg number to internal dwarf reg numbers.  */
 457 #ifndef DWARF_REG_TO_UNWIND_COLUMN
 458 #define DWARF_REG_TO_UNWIND_COLUMN(REGNO) (REGNO)
 459 #endif
 460
 461 /* Map register numbers held in the call frame info that gcc has
 462    collected using DWARF_FRAME_REGNUM to those that should be output in
 463    .debug_frame and .eh_frame.  */
 464 #ifndef DWARF2_FRAME_REG_OUT
 465 #define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) (REGNO)
 466 #endif
 467
 468 /* The size of addresses as they appear in the Dwarf 2 data.
 469    Some architectures use word addresses to refer to code locations,
 470    but Dwarf 2 info always uses byte addresses.  On such machines,
 471    Dwarf 2 addresses need to be larger than the architecture's
 472    pointers.  */
 473 #ifndef DWARF2_ADDR_SIZE
 474 #define DWARF2_ADDR_SIZE ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)
 475 #endif
 476
 477 /* The size in bytes of a DWARF field indicating an offset or length
 478    relative to a debug info section, specified to be 4 bytes in the
 479    DWARF-2 specification.  The SGI/MIPS ABI defines it to be the same
 480    as PTR_SIZE.  */
 481 #ifndef DWARF_OFFSET_SIZE
 482 #define DWARF_OFFSET_SIZE 4
 483 #endif
 484
 485 /* The size in bytes of a DWARF 4 type signature.  */
 486 #ifndef DWARF_TYPE_SIGNATURE_SIZE
 487 #define DWARF_TYPE_SIGNATURE_SIZE 8
 488 #endif
 489
 490 /* Default sizes for base C types.  If the sizes are different for
 491    your target, you should override these values by defining the
 492    appropriate symbols in your tm.h file.  */
 493
 494 #ifndef BITS_PER_WORD
 495 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
 496 #endif
 497
 498 #ifndef CHAR_TYPE_SIZE
 499 #define CHAR_TYPE_SIZE BITS_PER_UNIT
 500 #endif
 501
 502 #ifndef BOOL_TYPE_SIZE
 503 /* `bool' has size and alignment `1', on almost all platforms.  */
 504 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
 505 #endif
 506
 507 #ifndef SHORT_TYPE_SIZE
 508 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
 509 #endif
 510
 511 #ifndef INT_TYPE_SIZE
 512 #define INT_TYPE_SIZE BITS_PER_WORD
 513 #endif
 514
 515 #ifndef LONG_TYPE_SIZE
 516 #define LONG_TYPE_SIZE BITS_PER_WORD
 517 #endif
 518
 519 #ifndef LONG_LONG_TYPE_SIZE
 520 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
 521 #endif
 522
 523 #ifndef WCHAR_TYPE_SIZE
 524 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
 525 #endif
 526
 527 #ifndef FLOAT_TYPE_SIZE
 528 #define FLOAT_TYPE_SIZE BITS_PER_WORD
 529 #endif
 530
 531 #ifndef DOUBLE_TYPE_SIZE
 532 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 533 #endif
 534
 535 #ifndef LONG_DOUBLE_TYPE_SIZE
 536 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 537 #endif
 538
 539 #ifndef DECIMAL32_TYPE_SIZE
 540 #define DECIMAL32_TYPE_SIZE 32
 541 #endif
 542
 543 #ifndef DECIMAL64_TYPE_SIZE
 544 #define DECIMAL64_TYPE_SIZE 64
 545 #endif
 546
 547 #ifndef DECIMAL128_TYPE_SIZE
 548 #define DECIMAL128_TYPE_SIZE 128
 549 #endif
 550
 551 #ifndef SHORT_FRACT_TYPE_SIZE
 552 #define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT
 553 #endif
 554
 555 #ifndef FRACT_TYPE_SIZE
 556 #define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2)
 557 #endif
 558
 559 #ifndef LONG_FRACT_TYPE_SIZE
 560 #define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4)
 561 #endif
 562
 563 #ifndef LONG_LONG_FRACT_TYPE_SIZE
 564 #define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8)
 565 #endif
 566
 567 #ifndef SHORT_ACCUM_TYPE_SIZE
 568 #define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2)
 569 #endif
 570
 571 #ifndef ACCUM_TYPE_SIZE
 572 #define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2)
 573 #endif
 574
 575 #ifndef LONG_ACCUM_TYPE_SIZE
 576 #define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2)
 577 #endif
 578
 579 #ifndef LONG_LONG_ACCUM_TYPE_SIZE
 580 #define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2)
 581 #endif
 582
 583 /* We let tm.h override the types used here, to handle trivial differences
 584    such as the choice of unsigned int or long unsigned int for size_t.
 585    When machines start needing nontrivial differences in the size type,
 586    it would be best to do something here to figure out automatically
 587    from other information what type to use.  */
 588
 589 #ifndef SIZE_TYPE
 590 #define SIZE_TYPE "long unsigned int"
 591 #endif
 592
 593 #ifndef SIZETYPE
 594 #define SIZETYPE SIZE_TYPE
 595 #endif
 596
 597 #ifndef PID_TYPE
 598 #define PID_TYPE "int"
 599 #endif
 600
 601 /* If GCC knows the exact uint_least16_t and uint_least32_t types from
 602    <stdint.h>, use them for char16_t and char32_t.  Otherwise, use
 603    these guesses; getting the wrong type of a given width will not
 604    affect C++ name mangling because in C++ these are distinct types
 605    not typedefs.  */
 606
 607 #ifdef UINT_LEAST16_TYPE
 608 #define CHAR16_TYPE UINT_LEAST16_TYPE
 609 #else
 610 #define CHAR16_TYPE "short unsigned int"
 611 #endif
 612
 613 #ifdef UINT_LEAST32_TYPE
 614 #define CHAR32_TYPE UINT_LEAST32_TYPE
 615 #else
 616 #define CHAR32_TYPE "unsigned int"
 617 #endif
 618
 619 #ifndef WCHAR_TYPE
 620 #define WCHAR_TYPE "int"
 621 #endif
 622
 623 /* WCHAR_TYPE gets overridden by -fshort-wchar.  */
 624 #define MODIFIED_WCHAR_TYPE \
 625         (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE)
 626
 627 #ifndef PTRDIFF_TYPE
 628 #define PTRDIFF_TYPE "long int"
 629 #endif
 630
 631 #ifndef WINT_TYPE
 632 #define WINT_TYPE "unsigned int"
 633 #endif
 634
 635 #ifndef INTMAX_TYPE
 636 #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)     \
 637                      ? "int"                                    \
 638                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 639                         ? "long int"                            \
 640                         : "long long int"))
 641 #endif
 642
 643 #ifndef UINTMAX_TYPE
 644 #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)    \
 645                      ? "unsigned int"                           \
 646                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 647                         ? "long unsigned int"                   \
 648                         : "long long unsigned int"))
 649 #endif
 650
 651
 652 /* There are no default definitions of these <stdint.h> types.  */
 653
 654 #ifndef SIG_ATOMIC_TYPE
 655 #define SIG_ATOMIC_TYPE ((const char *) NULL)
 656 #endif
 657
 658 #ifndef INT8_TYPE
 659 #define INT8_TYPE ((const char *) NULL)
 660 #endif
 661
 662 #ifndef INT16_TYPE
 663 #define INT16_TYPE ((const char *) NULL)
 664 #endif
 665
 666 #ifndef INT32_TYPE
 667 #define INT32_TYPE ((const char *) NULL)
 668 #endif
 669
 670 #ifndef INT64_TYPE
 671 #define INT64_TYPE ((const char *) NULL)
 672 #endif
 673
 674 #ifndef UINT8_TYPE
 675 #define UINT8_TYPE ((const char *) NULL)
 676 #endif
 677
 678 #ifndef UINT16_TYPE
 679 #define UINT16_TYPE ((const char *) NULL)
 680 #endif
 681
 682 #ifndef UINT32_TYPE
 683 #define UINT32_TYPE ((const char *) NULL)
 684 #endif
 685
 686 #ifndef UINT64_TYPE
 687 #define UINT64_TYPE ((const char *) NULL)
 688 #endif
 689
 690 #ifndef INT_LEAST8_TYPE
 691 #define INT_LEAST8_TYPE ((const char *) NULL)
 692 #endif
 693
 694 #ifndef INT_LEAST16_TYPE
 695 #define INT_LEAST16_TYPE ((const char *) NULL)
 696 #endif
 697
 698 #ifndef INT_LEAST32_TYPE
 699 #define INT_LEAST32_TYPE ((const char *) NULL)
 700 #endif
 701
 702 #ifndef INT_LEAST64_TYPE
 703 #define INT_LEAST64_TYPE ((const char *) NULL)
 704 #endif
 705
 706 #ifndef UINT_LEAST8_TYPE
 707 #define UINT_LEAST8_TYPE ((const char *) NULL)
 708 #endif
 709
 710 #ifndef UINT_LEAST16_TYPE
 711 #define UINT_LEAST16_TYPE ((const char *) NULL)
 712 #endif
 713
 714 #ifndef UINT_LEAST32_TYPE
 715 #define UINT_LEAST32_TYPE ((const char *) NULL)
 716 #endif
 717
 718 #ifndef UINT_LEAST64_TYPE
 719 #define UINT_LEAST64_TYPE ((const char *) NULL)
 720 #endif
 721
 722 #ifndef INT_FAST8_TYPE
 723 #define INT_FAST8_TYPE ((const char *) NULL)
 724 #endif
 725
 726 #ifndef INT_FAST16_TYPE
 727 #define INT_FAST16_TYPE ((const char *) NULL)
 728 #endif
 729
 730 #ifndef INT_FAST32_TYPE
 731 #define INT_FAST32_TYPE ((const char *) NULL)
 732 #endif
 733
 734 #ifndef INT_FAST64_TYPE
 735 #define INT_FAST64_TYPE ((const char *) NULL)
 736 #endif
 737
 738 #ifndef UINT_FAST8_TYPE
 739 #define UINT_FAST8_TYPE ((const char *) NULL)
 740 #endif
 741
 742 #ifndef UINT_FAST16_TYPE
 743 #define UINT_FAST16_TYPE ((const char *) NULL)
 744 #endif
 745
 746 #ifndef UINT_FAST32_TYPE
 747 #define UINT_FAST32_TYPE ((const char *) NULL)
 748 #endif
 749
 750 #ifndef UINT_FAST64_TYPE
 751 #define UINT_FAST64_TYPE ((const char *) NULL)
 752 #endif
 753
 754 #ifndef INTPTR_TYPE
 755 #define INTPTR_TYPE ((const char *) NULL)
 756 #endif
 757
 758 #ifndef UINTPTR_TYPE
 759 #define UINTPTR_TYPE ((const char *) NULL)
 760 #endif
 761
 762 /* Width in bits of a pointer.  Mind the value of the macro `Pmode'.  */
 763 #ifndef POINTER_SIZE
 764 #define POINTER_SIZE BITS_PER_WORD
 765 #endif
 766 #ifndef POINTER_SIZE_UNITS
 767 #define POINTER_SIZE_UNITS ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)
 768 #endif
 769
 770
 771 #ifndef PIC_OFFSET_TABLE_REGNUM
 772 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
 773 #endif
 774
 775 #ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
 776 #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 0
 777 #endif
 778
 779 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
 780 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
 781 #endif
 782
 783 #ifndef TARGET_DECLSPEC
 784 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
 785 /* If the target supports the "dllimport" attribute, users are
 786    probably used to the "__declspec" syntax.  */
 787 #define TARGET_DECLSPEC 1
 788 #else
 789 #define TARGET_DECLSPEC 0
 790 #endif
 791 #endif
 792
 793 /* By default, the preprocessor should be invoked the same way in C++
 794    as in C.  */
 795 #ifndef CPLUSPLUS_CPP_SPEC
 796 #ifdef CPP_SPEC
 797 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
 798 #endif
 799 #endif
 800
 801 #ifndef ACCUMULATE_OUTGOING_ARGS
 802 #define ACCUMULATE_OUTGOING_ARGS 0
 803 #endif
 804
 805 /* By default, use the GNU runtime for Objective C.  */
 806 #ifndef NEXT_OBJC_RUNTIME
 807 #define NEXT_OBJC_RUNTIME 0
 808 #endif
 809
 810 /* Supply a default definition for PUSH_ARGS.  */
 811 #ifndef PUSH_ARGS
 812 #ifdef PUSH_ROUNDING
 813 #define PUSH_ARGS       !ACCUMULATE_OUTGOING_ARGS
 814 #else
 815 #define PUSH_ARGS       0
 816 #endif
 817 #endif
 818
 819 /* Decide whether a function's arguments should be processed
 820    from first to last or from last to first.
 821
 822    They should if the stack and args grow in opposite directions, but
 823    only if we have push insns.  */
 824
 825 #ifdef PUSH_ROUNDING
 826
 827 #ifndef PUSH_ARGS_REVERSED
 828 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
 829 #define PUSH_ARGS_REVERSED  PUSH_ARGS
 830 #endif
 831 #endif
 832
 833 #endif
 834
 835 #ifndef PUSH_ARGS_REVERSED
 836 #define PUSH_ARGS_REVERSED 0
 837 #endif
 838
 839 /* Default value for the alignment (in bits) a C conformant malloc has to
 840    provide. This default is intended to be safe and always correct.  */
 841 #ifndef MALLOC_ABI_ALIGNMENT
 842 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
 843 #endif
 844
 845 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
 846    STACK_BOUNDARY is required.  */
 847 #ifndef PREFERRED_STACK_BOUNDARY
 848 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
 849 #endif
 850
 851 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not
 852    defined.  */
 853 #ifndef INCOMING_STACK_BOUNDARY
 854 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY
 855 #endif
 856
 857 #ifndef TARGET_DEFAULT_PACK_STRUCT
 858 #define TARGET_DEFAULT_PACK_STRUCT 0
 859 #endif
 860
 861 /* By default, the vtable entries are void pointers, the so the alignment
 862    is the same as pointer alignment.  The value of this macro specifies
 863    the alignment of the vtable entry in bits.  It should be defined only
 864    when special alignment is necessary.  */
 865 #ifndef TARGET_VTABLE_ENTRY_ALIGN
 866 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
 867 #endif
 868
 869 /* There are a few non-descriptor entries in the vtable at offsets below
 870    zero.  If these entries must be padded (say, to preserve the alignment
 871    specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
 872    words in each data entry.  */
 873 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
 874 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
 875 #endif
 876
 877 /* Decide whether it is safe to use a local alias for a virtual function
 878    when constructing thunks.  */
 879 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
 880 #ifdef ASM_OUTPUT_DEF
 881 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
 882 #else
 883 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
 884 #endif
 885 #endif
 886
 887 /* Select a format to encode pointers in exception handling data.  We
 888    prefer those that result in fewer dynamic relocations.  Assume no
 889    special support here and encode direct references.  */
 890 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
 891 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  DW_EH_PE_absptr
 892 #endif
 893
 894 /* By default, the C++ compiler will use the lowest bit of the pointer
 895    to function to indicate a pointer-to-member-function points to a
 896    virtual member function.  However, if FUNCTION_BOUNDARY indicates
 897    function addresses aren't always even, the lowest bit of the delta
 898    field will be used.  */
 899 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
 900 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
 901   (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
 902    ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
 903 #endif
 904
 905 #ifndef DEFAULT_GDB_EXTENSIONS
 906 #define DEFAULT_GDB_EXTENSIONS 1
 907 #endif
 908
 909 #ifndef SDB_DEBUGGING_INFO
 910 #define SDB_DEBUGGING_INFO 0
 911 #endif
 912
 913 /* If more than one debugging type is supported, you must define
 914    PREFERRED_DEBUGGING_TYPE to choose the default.  */
 915
 916 #if 1 < (defined (DBX_DEBUGGING_INFO) + (SDB_DEBUGGING_INFO) \
 917          + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
 918          + defined (VMS_DEBUGGING_INFO))
 919 #ifndef PREFERRED_DEBUGGING_TYPE
 920 #error You must define PREFERRED_DEBUGGING_TYPE
 921 #endif /* no PREFERRED_DEBUGGING_TYPE */
 922
 923 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
 924    here so other code needn't care.  */
 925 #elif defined DBX_DEBUGGING_INFO
 926 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 927
 928 #elif SDB_DEBUGGING_INFO
 929 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
 930
 931 #elif defined DWARF2_DEBUGGING_INFO || defined DWARF2_LINENO_DEBUGGING_INFO
 932 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 933
 934 #elif defined VMS_DEBUGGING_INFO
 935 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
 936
 937 #elif defined XCOFF_DEBUGGING_INFO
 938 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
 939
 940 #else
 941 /* No debugging format is supported by this target.  */
 942 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
 943 #endif
 944
 945 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
 946 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
 947 #endif
 948
 949 /* True if the targets integer-comparison functions return { 0, 1, 2
 950    } to indicate { <, ==, > }.  False if { -1, 0, 1 } is used
 951    instead.  The libgcc routines are biased.  */
 952 #ifndef TARGET_LIB_INT_CMP_BIASED
 953 #define TARGET_LIB_INT_CMP_BIASED (true)
 954 #endif
 955
 956 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
 957    then the word-endianness is the same as for integers.  */
 958 #ifndef FLOAT_WORDS_BIG_ENDIAN
 959 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 960 #endif
 961
 962 #ifndef REG_WORDS_BIG_ENDIAN
 963 #define REG_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 964 #endif
 965
 966 #ifdef TARGET_FLT_EVAL_METHOD
 967 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 1
 968 #else
 969 #define TARGET_FLT_EVAL_METHOD 0
 970 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 0
 971 #endif
 972
 973 #ifndef TARGET_DEC_EVAL_METHOD
 974 #define TARGET_DEC_EVAL_METHOD 2
 975 #endif
 976
 977 #ifndef HAS_LONG_COND_BRANCH
 978 #define HAS_LONG_COND_BRANCH 0
 979 #endif
 980
 981 #ifndef HAS_LONG_UNCOND_BRANCH
 982 #define HAS_LONG_UNCOND_BRANCH 0
 983 #endif
 984
 985 /* Determine whether __cxa_atexit, rather than atexit, is used to
 986    register C++ destructors for local statics and global objects.  */
 987 #ifndef DEFAULT_USE_CXA_ATEXIT
 988 #define DEFAULT_USE_CXA_ATEXIT 0
 989 #endif
 990
 991 #if GCC_VERSION >= 3000 && defined IN_GCC
 992 /* These old constraint macros shouldn't appear anywhere in a
 993    configuration using MD constraint definitions.  */
 994 #endif
 995
 996 /* Determin whether the target runtime library is Bionic */
 997 #ifndef TARGET_HAS_BIONIC
 998 #define TARGET_HAS_BIONIC 0
 999 #endif
1000
1001 /* Indicate that CLZ and CTZ are undefined at zero.  */
1002 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
1003 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
1004 #endif
1005 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
1006 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
1007 #endif
1008
1009 /* Provide a default value for STORE_FLAG_VALUE.  */
1010 #ifndef STORE_FLAG_VALUE
1011 #define STORE_FLAG_VALUE  1
1012 #endif
1013
1014 /* This macro is used to determine what the largest unit size that
1015    move_by_pieces can use is.  */
1016
1017 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
1018    move efficiently, as opposed to  MOVE_MAX which is the maximum
1019    number of bytes we can move with a single instruction.  */
1020
1021 #ifndef MOVE_MAX_PIECES
1022 #define MOVE_MAX_PIECES   MOVE_MAX
1023 #endif
1024
1025 /* STORE_MAX_PIECES is the number of bytes at a time that we can
1026    store efficiently.  Due to internal GCC limitations, this is
1027    MOVE_MAX_PIECES limited by the number of bytes GCC can represent
1028    for an immediate constant.  */
1029
1030 #ifndef STORE_MAX_PIECES
1031 #define STORE_MAX_PIECES  MIN (MOVE_MAX_PIECES, 2 * sizeof (HOST_WIDE_INT))
1032 #endif
1033
1034 /* Likewise for block comparisons.  */
1035 #ifndef COMPARE_MAX_PIECES
1036 #define COMPARE_MAX_PIECES  MOVE_MAX_PIECES
1037 #endif
1038
1039 #ifndef MAX_MOVE_MAX
1040 #define MAX_MOVE_MAX MOVE_MAX
1041 #endif
1042
1043 #ifndef MIN_UNITS_PER_WORD
1044 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
1045 #endif
1046
1047 #ifndef MAX_BITS_PER_WORD
1048 #define MAX_BITS_PER_WORD BITS_PER_WORD
1049 #endif
1050
1051 #ifndef STACK_POINTER_OFFSET
1052 #define STACK_POINTER_OFFSET    0
1053 #endif
1054
1055 #ifndef LOCAL_REGNO
1056 #define LOCAL_REGNO(REGNO)  0
1057 #endif
1058
1059 #ifndef HONOR_REG_ALLOC_ORDER
1060 #define HONOR_REG_ALLOC_ORDER 0
1061 #endif
1062
1063 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1064    the stack pointer does not matter.  The value is tested only in
1065    functions that have frame pointers.  */
1066 #ifndef EXIT_IGNORE_STACK
1067 #define EXIT_IGNORE_STACK 0
1068 #endif
1069
1070 /* Assume that case vectors are not pc-relative.  */
1071 #ifndef CASE_VECTOR_PC_RELATIVE
1072 #define CASE_VECTOR_PC_RELATIVE 0
1073 #endif
1074
1075 /* Assume that trampolines need function alignment.  */
1076 #ifndef TRAMPOLINE_ALIGNMENT
1077 #define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY
1078 #endif
1079
1080 /* Register mappings for target machines without register windows.  */
1081 #ifndef INCOMING_REGNO
1082 #define INCOMING_REGNO(N) (N)
1083 #endif
1084
1085 #ifndef OUTGOING_REGNO
1086 #define OUTGOING_REGNO(N) (N)
1087 #endif
1088
1089 #ifndef SHIFT_COUNT_TRUNCATED
1090 #define SHIFT_COUNT_TRUNCATED 0
1091 #endif
1092
1093 #ifndef LEGITIMATE_PIC_OPERAND_P
1094 #define LEGITIMATE_PIC_OPERAND_P(X) 1
1095 #endif
1096
1097 #ifndef TARGET_MEM_CONSTRAINT
1098 #define TARGET_MEM_CONSTRAINT 'm'
1099 #endif
1100
1101 #ifndef REVERSIBLE_CC_MODE
1102 #define REVERSIBLE_CC_MODE(MODE) 0
1103 #endif
1104
1105 /* Biggest alignment supported by the object file format of this machine.  */
1106 #ifndef MAX_OFILE_ALIGNMENT
1107 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
1108 #endif
1109
1110 #ifndef FRAME_GROWS_DOWNWARD
1111 #define FRAME_GROWS_DOWNWARD 0
1112 #endif
1113
1114 #ifndef RETURN_ADDR_IN_PREVIOUS_FRAME
1115 #define RETURN_ADDR_IN_PREVIOUS_FRAME 0
1116 #endif
1117
1118 /* On most machines, the CFA coincides with the first incoming parm.  */
1119 #ifndef ARG_POINTER_CFA_OFFSET
1120 #define ARG_POINTER_CFA_OFFSET(FNDECL) \
1121   (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
1122 #endif
1123
1124 /* On most machines, we use the CFA as DW_AT_frame_base.  */
1125 #ifndef CFA_FRAME_BASE_OFFSET
1126 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0
1127 #endif
1128
1129 /* The offset from the incoming value of %sp to the top of the stack frame
1130    for the current function.  */
1131 #ifndef INCOMING_FRAME_SP_OFFSET
1132 #define INCOMING_FRAME_SP_OFFSET 0
1133 #endif
1134
1135 #ifndef HARD_REGNO_NREGS_HAS_PADDING
1136 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
1137 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
1138 #endif
1139
1140 #ifndef OUTGOING_REG_PARM_STACK_SPACE
1141 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
1142 #endif
1143
1144 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
1145    the backend.  MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
1146    effort stack alignment supported by the backend.  If the backend
1147    supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
1148    MAX_STACK_ALIGNMENT are the same.  Otherwise, the incoming stack
1149    boundary will limit the maximum guaranteed stack alignment.  */
1150 #ifdef MAX_STACK_ALIGNMENT
1151 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
1152 #else
1153 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY
1154 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
1155 #endif
1156
1157 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
1158
1159 #ifndef LOCAL_ALIGNMENT
1160 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
1161 #endif
1162
1163 #ifndef STACK_SLOT_ALIGNMENT
1164 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
1165   ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
1166 #endif
1167
1168 #ifndef LOCAL_DECL_ALIGNMENT
1169 #define LOCAL_DECL_ALIGNMENT(DECL) \
1170   LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
1171 #endif
1172
1173 #ifndef MINIMUM_ALIGNMENT
1174 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN)
1175 #endif
1176
1177 /* Alignment value for attribute ((aligned)).  */
1178 #ifndef ATTRIBUTE_ALIGNED_VALUE
1179 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
1180 #endif
1181
1182 #ifndef SLOW_UNALIGNED_ACCESS
1183 #define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) STRICT_ALIGNMENT
1184 #endif
1185
1186 /* For most ports anything that evaluates to a constant symbolic
1187    or integer value is acceptable as a constant address.  */
1188 #ifndef CONSTANT_ADDRESS_P
1189 #define CONSTANT_ADDRESS_P(X)   (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE)
1190 #endif
1191
1192 #ifndef MAX_FIXED_MODE_SIZE
1193 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
1194 #endif
1195
1196 /* Nonzero if structures and unions should be returned in memory.
1197
1198    This should only be defined if compatibility with another compiler or
1199    with an ABI is needed, because it results in slower code.  */
1200
1201 #ifndef DEFAULT_PCC_STRUCT_RETURN
1202 #define DEFAULT_PCC_STRUCT_RETURN 1
1203 #endif
1204
1205 #ifndef PCC_BITFIELD_TYPE_MATTERS
1206 #define PCC_BITFIELD_TYPE_MATTERS false
1207 #endif
1208
1209 #ifndef INSN_SETS_ARE_DELAYED
1210 #define INSN_SETS_ARE_DELAYED(INSN) false
1211 #endif
1212
1213 #ifndef INSN_REFERENCES_ARE_DELAYED
1214 #define INSN_REFERENCES_ARE_DELAYED(INSN) false
1215 #endif
1216
1217 #ifndef NO_FUNCTION_CSE
1218 #define NO_FUNCTION_CSE false
1219 #endif
1220
1221 #ifndef HARD_REGNO_RENAME_OK
1222 #define HARD_REGNO_RENAME_OK(FROM, TO) true
1223 #endif
1224
1225 #ifndef EPILOGUE_USES
1226 #define EPILOGUE_USES(REG) false
1227 #endif
1228
1229 #ifndef ARGS_GROW_DOWNWARD
1230 #define ARGS_GROW_DOWNWARD 0
1231 #endif
1232
1233 #ifndef STACK_GROWS_DOWNWARD
1234 #define STACK_GROWS_DOWNWARD 0
1235 #endif
1236
1237 #ifndef STACK_PUSH_CODE
1238 #if STACK_GROWS_DOWNWARD
1239 #define STACK_PUSH_CODE PRE_DEC
1240 #else
1241 #define STACK_PUSH_CODE PRE_INC
1242 #endif
1243 #endif
1244
1245 /* Default value for flag_pie when flag_pie is initialized to -1:
1246    --enable-default-pie: Default flag_pie to -fPIE.
1247    --disable-default-pie: Default flag_pie to 0.
1248  */
1249 #ifdef ENABLE_DEFAULT_PIE
1250 # ifndef DEFAULT_FLAG_PIE
1251 #  define DEFAULT_FLAG_PIE 2
1252 # endif
1253 #else
1254 # define DEFAULT_FLAG_PIE 0
1255 #endif
1256
1257 #ifndef SWITCHABLE_TARGET
1258 #define SWITCHABLE_TARGET 0
1259 #endif
1260
1261 /* If the target supports integers that are wider than two
1262    HOST_WIDE_INTs on the host compiler, then the target should define
1263    TARGET_SUPPORTS_WIDE_INT and make the appropriate fixups.
1264    Otherwise the compiler really is not robust.  */
1265 #ifndef TARGET_SUPPORTS_WIDE_INT
1266 #define TARGET_SUPPORTS_WIDE_INT 0
1267 #endif
1268
1269 #ifndef SHORT_IMMEDIATES_SIGN_EXTEND
1270 #define SHORT_IMMEDIATES_SIGN_EXTEND 0
1271 #endif
1272
1273 #ifndef WORD_REGISTER_OPERATIONS
1274 #define WORD_REGISTER_OPERATIONS 0
1275 #endif
1276
1277 #ifndef CONSTANT_ALIGNMENT
1278 #define CONSTANT_ALIGNMENT(EXP, ALIGN) ALIGN
1279 #endif
1280
1281 #ifndef INITIAL_FRAME_ADDRESS_RTX
1282 #define INITIAL_FRAME_ADDRESS_RTX NULL
1283 #endif
1284
1285 #ifndef SETUP_FRAME_ADDRESSES
1286 #define SETUP_FRAME_ADDRESSES() do { } while (0)
1287 #endif
1288
1289 #ifndef DYNAMIC_CHAIN_ADDRESS
1290 #define DYNAMIC_CHAIN_ADDRESS(x) (x)
1291 #endif
1292
1293 #ifndef FRAME_ADDR_RTX
1294 #define FRAME_ADDR_RTX(x) (x)
1295 #endif
1296
1297 #ifndef REVERSE_CONDITION
1298 #define REVERSE_CONDITION(code, mode) reverse_condition (code)
1299 #endif
1300
1301 #ifndef TARGET_PECOFF
1302 #define TARGET_PECOFF 0
1303 #endif
1304
1305 #ifndef EH_RETURN_HANDLER_RTX
1306 #define EH_RETURN_HANDLER_RTX NULL
1307 #endif
1308
1309 #ifdef GCC_INSN_FLAGS_H
1310 /* Dependent default target macro definitions
1311
1312    This section of defaults.h defines target macros that depend on generated
1313    headers.  This is a bit awkward:  We want to put all default definitions
1314    for target macros in defaults.h, but some of the defaults depend on the
1315    HAVE_* flags defines of insn-flags.h.  But insn-flags.h is not always
1316    included by files that do include defaults.h.
1317
1318    Fortunately, the default macro definitions that depend on the HAVE_*
1319    macros are also the ones that will only be used inside GCC itself, i.e.
1320    not in the gen* programs or in target objects like libgcc.
1321
1322    Obviously, it would be best to keep this section of defaults.h as small
1323    as possible, by converting the macros defined below to target hooks or
1324    functions.
1325 */
1326
1327 /* The default branch cost is 1.  */
1328 #ifndef BRANCH_COST
1329 #define BRANCH_COST(speed_p, predictable_p) 1
1330 #endif
1331
1332 /* If a memory-to-memory move would take MOVE_RATIO or more simple
1333    move-instruction sequences, we will do a movmem or libcall instead.  */
1334
1335 #ifndef MOVE_RATIO
1336 #if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti)
1337 #define MOVE_RATIO(speed) 2
1338 #else
1339 /* If we are optimizing for space (-Os), cut down the default move ratio.  */
1340 #define MOVE_RATIO(speed) ((speed) ? 15 : 3)
1341 #endif
1342 #endif
1343
1344 /* If a clear memory operation would take CLEAR_RATIO or more simple
1345    move-instruction sequences, we will do a setmem or libcall instead.  */
1346
1347 #ifndef CLEAR_RATIO
1348 #if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
1349 #define CLEAR_RATIO(speed) 2
1350 #else
1351 /* If we are optimizing for space, cut down the default clear ratio.  */
1352 #define CLEAR_RATIO(speed) ((speed) ? 15 :3)
1353 #endif
1354 #endif
1355
1356 /* If a memory set (to value other than zero) operation would take
1357    SET_RATIO or more simple move-instruction sequences, we will do a movmem
1358    or libcall instead.  */
1359 #ifndef SET_RATIO
1360 #define SET_RATIO(speed) MOVE_RATIO (speed)
1361 #endif
1362
1363 /* Supply a default definition for FUNCTION_ARG_PADDING:
1364    usually pad upward, but pad short args downward on
1365    big-endian machines.  */
1366
1367 #define DEFAULT_FUNCTION_ARG_PADDING(MODE, TYPE)                        \
1368   (! BYTES_BIG_ENDIAN                                                   \
1369    ? upward                                                             \
1370    : (((MODE) == BLKmode                                                \
1371        ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST         \
1372           && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \
1373        : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY)                       \
1374       ? downward : upward))
1375
1376 #ifndef FUNCTION_ARG_PADDING
1377 #define FUNCTION_ARG_PADDING(MODE, TYPE)        \
1378   DEFAULT_FUNCTION_ARG_PADDING ((MODE), (TYPE))
1379 #endif
1380
1381 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
1382    Normally move_insn, so Pmode stack pointer.  */
1383
1384 #ifndef STACK_SAVEAREA_MODE
1385 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
1386 #endif
1387
1388 /* Supply a default definition of STACK_SIZE_MODE for
1389    allocate_dynamic_stack_space.  Normally PLUS/MINUS, so word_mode.  */
1390
1391 #ifndef STACK_SIZE_MODE
1392 #define STACK_SIZE_MODE word_mode
1393 #endif
1394
1395 /* Default value for flag_stack_protect when flag_stack_protect is initialized to -1:
1396    --enable-default-ssp: Default flag_stack_protect to -fstack-protector-strong.
1397    --disable-default-ssp: Default flag_stack_protect to 0.
1398  */
1399 #ifdef ENABLE_DEFAULT_SSP
1400 # ifndef DEFAULT_FLAG_SSP
1401 #  define DEFAULT_FLAG_SSP 3
1402 # endif
1403 #else
1404 # define DEFAULT_FLAG_SSP 0
1405 #endif
1406
1407 /* Provide default values for the macros controlling stack checking.  */
1408
1409 /* The default is neither full builtin stack checking...  */
1410 #ifndef STACK_CHECK_BUILTIN
1411 #define STACK_CHECK_BUILTIN 0
1412 #endif
1413
1414 /* ...nor static builtin stack checking.  */
1415 #ifndef STACK_CHECK_STATIC_BUILTIN
1416 #define STACK_CHECK_STATIC_BUILTIN 0
1417 #endif
1418
1419 /* The default interval is one page (4096 bytes).  */
1420 #ifndef STACK_CHECK_PROBE_INTERVAL_EXP
1421 #define STACK_CHECK_PROBE_INTERVAL_EXP 12
1422 #endif
1423
1424 /* The default is not to move the stack pointer.  */
1425 #ifndef STACK_CHECK_MOVING_SP
1426 #define STACK_CHECK_MOVING_SP 0
1427 #endif
1428
1429 /* This is a kludge to try to capture the discrepancy between the old
1430    mechanism (generic stack checking) and the new mechanism (static
1431    builtin stack checking).  STACK_CHECK_PROTECT needs to be bumped
1432    for the latter because part of the protection area is effectively
1433    included in STACK_CHECK_MAX_FRAME_SIZE for the former.  */
1434 #ifdef STACK_CHECK_PROTECT
1435 #define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
1436 #else
1437 #define STACK_OLD_CHECK_PROTECT                                         \
1438  (!global_options.x_flag_exceptions                                     \
1439   ? 75 * UNITS_PER_WORD                                                 \
1440   : targetm_common.except_unwind_info (&global_options) == UI_SJLJ      \
1441     ? 4 * 1024                                                          \
1442     : 8 * 1024)
1443 #endif
1444
1445 /* Minimum amount of stack required to recover from an anticipated stack
1446    overflow detection.  The default value conveys an estimate of the amount
1447    of stack required to propagate an exception.  */
1448 #ifndef STACK_CHECK_PROTECT
1449 #define STACK_CHECK_PROTECT                                             \
1450  (!global_options.x_flag_exceptions                                     \
1451   ? 4 * 1024                                                            \
1452   : targetm_common.except_unwind_info (&global_options) == UI_SJLJ      \
1453     ? 8 * 1024                                                          \
1454     : 12 * 1024)
1455 #endif
1456
1457 /* Make the maximum frame size be the largest we can and still only need
1458    one probe per function.  */
1459 #ifndef STACK_CHECK_MAX_FRAME_SIZE
1460 #define STACK_CHECK_MAX_FRAME_SIZE \
1461   ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD)
1462 #endif
1463
1464 /* This is arbitrary, but should be large enough everywhere.  */
1465 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
1466 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
1467 #endif
1468
1469 /* Provide a reasonable default for the maximum size of an object to
1470    allocate in the fixed frame.  We may need to be able to make this
1471    controllable by the user at some point.  */
1472 #ifndef STACK_CHECK_MAX_VAR_SIZE
1473 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
1474 #endif
1475
1476 /* By default, the C++ compiler will use function addresses in the
1477    vtable entries.  Setting this nonzero tells the compiler to use
1478    function descriptors instead.  The value of this macro says how
1479    many words wide the descriptor is (normally 2).  It is assumed
1480    that the address of a function descriptor may be treated as a
1481    pointer to a function.  */
1482 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
1483 #define TARGET_VTABLE_USES_DESCRIPTORS 0
1484 #endif
1485
1486 #endif /* GCC_INSN_FLAGS_H  */
1487
1488 #ifndef DWARF_GNAT_ENCODINGS_DEFAULT
1489 #define DWARF_GNAT_ENCODINGS_DEFAULT DWARF_GNAT_ENCODINGS_GDB
1490 #endif
1491
1492 #endif  /* ! GCC_DEFAULTS_H */