gcc/defaults.h

   1 /* Definitions of various defaults for tm.h macros.
   2    Copyright (C) 1992-2021 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 marking sections with
 290    SHF_GNU_RETAIN flag.  Also require .init_array/.fini_array section
 291    for constructors and destructors.  */
 292 #ifndef SUPPORTS_SHF_GNU_RETAIN
 293 #if HAVE_GAS_SHF_GNU_RETAIN && HAVE_INITFINI_ARRAY_SUPPORT
 294 #define SUPPORTS_SHF_GNU_RETAIN 1
 295 #else
 296 #define SUPPORTS_SHF_GNU_RETAIN 0
 297 #endif
 298 #endif
 299
 300 /* This determines whether or not we support link-once semantics.  */
 301 #ifndef SUPPORTS_ONE_ONLY
 302 #ifdef MAKE_DECL_ONE_ONLY
 303 #define SUPPORTS_ONE_ONLY 1
 304 #else
 305 #define SUPPORTS_ONE_ONLY 0
 306 #endif
 307 #endif
 308
 309 /* This determines whether weak symbols must be left out of a static
 310    archive's table of contents.  Defining this macro to be nonzero has
 311    the consequence that certain symbols will not be made weak that
 312    otherwise would be.  The C++ ABI requires this macro to be zero;
 313    see the documentation.  */
 314 #ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 315 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
 316 #endif
 317
 318 /* This determines whether or not we need linkonce unwind information.  */
 319 #ifndef TARGET_USES_WEAK_UNWIND_INFO
 320 #define TARGET_USES_WEAK_UNWIND_INFO 0
 321 #endif
 322
 323 /* By default, there is no prefix on user-defined symbols.  */
 324 #ifndef USER_LABEL_PREFIX
 325 #define USER_LABEL_PREFIX ""
 326 #endif
 327
 328 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
 329    provide a weak attribute.  Else define it to nothing.
 330
 331    This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
 332    not available at that time.
 333
 334    Note, this is only for use by target files which we know are to be
 335    compiled by GCC.  */
 336 #ifndef TARGET_ATTRIBUTE_WEAK
 337 # if SUPPORTS_WEAK
 338 #  define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
 339 # else
 340 #  define TARGET_ATTRIBUTE_WEAK
 341 # endif
 342 #endif
 343
 344 /* By default we can assume that all global symbols are in one namespace,
 345    across all shared libraries.  */
 346 #ifndef MULTIPLE_SYMBOL_SPACES
 347 # define MULTIPLE_SYMBOL_SPACES 0
 348 #endif
 349
 350 /* If the target supports init_priority C++ attribute, give
 351    SUPPORTS_INIT_PRIORITY a nonzero value.  */
 352 #ifndef SUPPORTS_INIT_PRIORITY
 353 #define SUPPORTS_INIT_PRIORITY 1
 354 #endif /* SUPPORTS_INIT_PRIORITY */
 355
 356 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
 357    the rest of the DWARF 2 frame unwind support is also provided.  */
 358 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
 359 #define DWARF2_UNWIND_INFO 1
 360 #endif
 361
 362 /* If we have named sections, and we're using crtstuff to run ctors,
 363    use them for registering eh frame information.  */
 364 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
 365     && !defined (EH_FRAME_THROUGH_COLLECT2)
 366 #ifndef EH_FRAME_SECTION_NAME
 367 #define EH_FRAME_SECTION_NAME ".eh_frame"
 368 #endif
 369 #endif
 370
 371 /* On many systems, different EH table encodings are used under
 372    difference circumstances.  Some will require runtime relocations;
 373    some will not.  For those that do not require runtime relocations,
 374    we would like to make the table read-only.  However, since the
 375    read-only tables may need to be combined with read-write tables
 376    that do require runtime relocation, it is not safe to make the
 377    tables read-only unless the linker will merge read-only and
 378    read-write sections into a single read-write section.  If your
 379    linker does not have this ability, but your system is such that no
 380    encoding used with non-PIC code will ever require a runtime
 381    relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in
 382    your target configuration file.  */
 383 #ifndef EH_TABLES_CAN_BE_READ_ONLY
 384 #ifdef HAVE_LD_RO_RW_SECTION_MIXING
 385 #define EH_TABLES_CAN_BE_READ_ONLY 1
 386 #else
 387 #define EH_TABLES_CAN_BE_READ_ONLY 0
 388 #endif
 389 #endif
 390
 391 /* Provide defaults for stuff that may not be defined when using
 392    sjlj exceptions.  */
 393 #ifndef EH_RETURN_DATA_REGNO
 394 #define EH_RETURN_DATA_REGNO(N) INVALID_REGNUM
 395 #endif
 396
 397 /* Offset between the eh handler address and entry in eh tables.  */
 398 #ifndef RETURN_ADDR_OFFSET
 399 #define RETURN_ADDR_OFFSET 0
 400 #endif
 401
 402 #ifndef MASK_RETURN_ADDR
 403 #define MASK_RETURN_ADDR NULL_RTX
 404 #endif
 405
 406 /* Number of hardware registers that go into the DWARF-2 unwind info.
 407    If not defined, equals FIRST_PSEUDO_REGISTER  */
 408
 409 #ifndef DWARF_FRAME_REGISTERS
 410 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
 411 #endif
 412
 413 /* Offsets recorded in opcodes are a multiple of this alignment factor.  */
 414 #ifndef DWARF_CIE_DATA_ALIGNMENT
 415 #ifdef STACK_GROWS_DOWNWARD
 416 #define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD))
 417 #else
 418 #define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD)
 419 #endif
 420 #endif
 421
 422 /* The DWARF 2 CFA column which tracks the return address.  Normally this
 423    is the column for PC, or the first column after all of the hard
 424    registers.  */
 425 #ifndef DWARF_FRAME_RETURN_COLUMN
 426 #ifdef PC_REGNUM
 427 #define DWARF_FRAME_RETURN_COLUMN       DWARF_FRAME_REGNUM (PC_REGNUM)
 428 #else
 429 #define DWARF_FRAME_RETURN_COLUMN       DWARF_FRAME_REGISTERS
 430 #endif
 431 #endif
 432
 433 /* How to renumber registers for dbx and gdb.  If not defined, assume
 434    no renumbering is necessary.  */
 435
 436 #ifndef DBX_REGISTER_NUMBER
 437 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 438 #endif
 439
 440 /* The mapping from gcc register number to DWARF 2 CFA column number.
 441    By default, we just provide columns for all registers.  */
 442 #ifndef DWARF_FRAME_REGNUM
 443 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
 444 #endif
 445
 446 /* The mapping from dwarf CFA reg number to internal dwarf reg numbers.  */
 447 #ifndef DWARF_REG_TO_UNWIND_COLUMN
 448 #define DWARF_REG_TO_UNWIND_COLUMN(REGNO) (REGNO)
 449 #endif
 450
 451 /* Map register numbers held in the call frame info that gcc has
 452    collected using DWARF_FRAME_REGNUM to those that should be output in
 453    .debug_frame and .eh_frame.  */
 454 #ifndef DWARF2_FRAME_REG_OUT
 455 #define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) (REGNO)
 456 #endif
 457
 458 /* The size of addresses as they appear in the Dwarf 2 data.
 459    Some architectures use word addresses to refer to code locations,
 460    but Dwarf 2 info always uses byte addresses.  On such machines,
 461    Dwarf 2 addresses need to be larger than the architecture's
 462    pointers.  */
 463 #ifndef DWARF2_ADDR_SIZE
 464 #define DWARF2_ADDR_SIZE ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)
 465 #endif
 466
 467 /* The size in bytes of a DWARF field indicating an offset or length
 468    relative to a debug info section, specified to be 4 bytes in the
 469    DWARF-2 specification.  The SGI/MIPS ABI defines it to be the same
 470    as PTR_SIZE.  */
 471 #ifndef DWARF_OFFSET_SIZE
 472 #define DWARF_OFFSET_SIZE 4
 473 #endif
 474
 475 /* The size in bytes of a DWARF 4 type signature.  */
 476 #ifndef DWARF_TYPE_SIGNATURE_SIZE
 477 #define DWARF_TYPE_SIGNATURE_SIZE 8
 478 #endif
 479
 480 /* Default sizes for base C types.  If the sizes are different for
 481    your target, you should override these values by defining the
 482    appropriate symbols in your tm.h file.  */
 483
 484 #ifndef BITS_PER_WORD
 485 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
 486 #endif
 487
 488 #ifndef CHAR_TYPE_SIZE
 489 #define CHAR_TYPE_SIZE BITS_PER_UNIT
 490 #endif
 491
 492 #ifndef BOOL_TYPE_SIZE
 493 /* `bool' has size and alignment `1', on almost all platforms.  */
 494 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
 495 #endif
 496
 497 #ifndef SHORT_TYPE_SIZE
 498 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
 499 #endif
 500
 501 #ifndef INT_TYPE_SIZE
 502 #define INT_TYPE_SIZE BITS_PER_WORD
 503 #endif
 504
 505 #ifndef LONG_TYPE_SIZE
 506 #define LONG_TYPE_SIZE BITS_PER_WORD
 507 #endif
 508
 509 #ifndef LONG_LONG_TYPE_SIZE
 510 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
 511 #endif
 512
 513 #ifndef WCHAR_TYPE_SIZE
 514 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
 515 #endif
 516
 517 #ifndef FLOAT_TYPE_SIZE
 518 #define FLOAT_TYPE_SIZE BITS_PER_WORD
 519 #endif
 520
 521 #ifndef DOUBLE_TYPE_SIZE
 522 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 523 #endif
 524
 525 #ifndef LONG_DOUBLE_TYPE_SIZE
 526 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 527 #endif
 528
 529 #ifndef DECIMAL32_TYPE_SIZE
 530 #define DECIMAL32_TYPE_SIZE 32
 531 #endif
 532
 533 #ifndef DECIMAL64_TYPE_SIZE
 534 #define DECIMAL64_TYPE_SIZE 64
 535 #endif
 536
 537 #ifndef DECIMAL128_TYPE_SIZE
 538 #define DECIMAL128_TYPE_SIZE 128
 539 #endif
 540
 541 #ifndef SHORT_FRACT_TYPE_SIZE
 542 #define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT
 543 #endif
 544
 545 #ifndef FRACT_TYPE_SIZE
 546 #define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2)
 547 #endif
 548
 549 #ifndef LONG_FRACT_TYPE_SIZE
 550 #define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4)
 551 #endif
 552
 553 #ifndef LONG_LONG_FRACT_TYPE_SIZE
 554 #define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8)
 555 #endif
 556
 557 #ifndef SHORT_ACCUM_TYPE_SIZE
 558 #define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2)
 559 #endif
 560
 561 #ifndef ACCUM_TYPE_SIZE
 562 #define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2)
 563 #endif
 564
 565 #ifndef LONG_ACCUM_TYPE_SIZE
 566 #define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2)
 567 #endif
 568
 569 #ifndef LONG_LONG_ACCUM_TYPE_SIZE
 570 #define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2)
 571 #endif
 572
 573 /* We let tm.h override the types used here, to handle trivial differences
 574    such as the choice of unsigned int or long unsigned int for size_t.
 575    When machines start needing nontrivial differences in the size type,
 576    it would be best to do something here to figure out automatically
 577    from other information what type to use.  */
 578
 579 #ifndef SIZE_TYPE
 580 #define SIZE_TYPE "long unsigned int"
 581 #endif
 582
 583 #ifndef SIZETYPE
 584 #define SIZETYPE SIZE_TYPE
 585 #endif
 586
 587 #ifndef PID_TYPE
 588 #define PID_TYPE "int"
 589 #endif
 590
 591 /* If GCC knows the exact uint_least16_t and uint_least32_t types from
 592    <stdint.h>, use them for char16_t and char32_t.  Otherwise, use
 593    these guesses; getting the wrong type of a given width will not
 594    affect C++ name mangling because in C++ these are distinct types
 595    not typedefs.  */
 596
 597 #ifndef CHAR8_TYPE
 598 #define CHAR8_TYPE "unsigned char"
 599 #endif
 600
 601 #ifdef UINT_LEAST16_TYPE
 602 #define CHAR16_TYPE UINT_LEAST16_TYPE
 603 #else
 604 #define CHAR16_TYPE "short unsigned int"
 605 #endif
 606
 607 #ifdef UINT_LEAST32_TYPE
 608 #define CHAR32_TYPE UINT_LEAST32_TYPE
 609 #else
 610 #define CHAR32_TYPE "unsigned int"
 611 #endif
 612
 613 #ifndef WCHAR_TYPE
 614 #define WCHAR_TYPE "int"
 615 #endif
 616
 617 /* WCHAR_TYPE gets overridden by -fshort-wchar.  */
 618 #define MODIFIED_WCHAR_TYPE \
 619         (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE)
 620
 621 #ifndef PTRDIFF_TYPE
 622 #define PTRDIFF_TYPE "long int"
 623 #endif
 624
 625 #ifndef WINT_TYPE
 626 #define WINT_TYPE "unsigned int"
 627 #endif
 628
 629 #ifndef INTMAX_TYPE
 630 #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)     \
 631                      ? "int"                                    \
 632                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 633                         ? "long int"                            \
 634                         : "long long int"))
 635 #endif
 636
 637 #ifndef UINTMAX_TYPE
 638 #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)    \
 639                      ? "unsigned int"                           \
 640                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 641                         ? "long unsigned int"                   \
 642                         : "long long unsigned int"))
 643 #endif
 644
 645
 646 /* There are no default definitions of these <stdint.h> types.  */
 647
 648 #ifndef SIG_ATOMIC_TYPE
 649 #define SIG_ATOMIC_TYPE ((const char *) NULL)
 650 #endif
 651
 652 #ifndef INT8_TYPE
 653 #define INT8_TYPE ((const char *) NULL)
 654 #endif
 655
 656 #ifndef INT16_TYPE
 657 #define INT16_TYPE ((const char *) NULL)
 658 #endif
 659
 660 #ifndef INT32_TYPE
 661 #define INT32_TYPE ((const char *) NULL)
 662 #endif
 663
 664 #ifndef INT64_TYPE
 665 #define INT64_TYPE ((const char *) NULL)
 666 #endif
 667
 668 #ifndef UINT8_TYPE
 669 #define UINT8_TYPE ((const char *) NULL)
 670 #endif
 671
 672 #ifndef UINT16_TYPE
 673 #define UINT16_TYPE ((const char *) NULL)
 674 #endif
 675
 676 #ifndef UINT32_TYPE
 677 #define UINT32_TYPE ((const char *) NULL)
 678 #endif
 679
 680 #ifndef UINT64_TYPE
 681 #define UINT64_TYPE ((const char *) NULL)
 682 #endif
 683
 684 #ifndef INT_LEAST8_TYPE
 685 #define INT_LEAST8_TYPE ((const char *) NULL)
 686 #endif
 687
 688 #ifndef INT_LEAST16_TYPE
 689 #define INT_LEAST16_TYPE ((const char *) NULL)
 690 #endif
 691
 692 #ifndef INT_LEAST32_TYPE
 693 #define INT_LEAST32_TYPE ((const char *) NULL)
 694 #endif
 695
 696 #ifndef INT_LEAST64_TYPE
 697 #define INT_LEAST64_TYPE ((const char *) NULL)
 698 #endif
 699
 700 #ifndef UINT_LEAST8_TYPE
 701 #define UINT_LEAST8_TYPE ((const char *) NULL)
 702 #endif
 703
 704 #ifndef UINT_LEAST16_TYPE
 705 #define UINT_LEAST16_TYPE ((const char *) NULL)
 706 #endif
 707
 708 #ifndef UINT_LEAST32_TYPE
 709 #define UINT_LEAST32_TYPE ((const char *) NULL)
 710 #endif
 711
 712 #ifndef UINT_LEAST64_TYPE
 713 #define UINT_LEAST64_TYPE ((const char *) NULL)
 714 #endif
 715
 716 #ifndef INT_FAST8_TYPE
 717 #define INT_FAST8_TYPE ((const char *) NULL)
 718 #endif
 719
 720 #ifndef INT_FAST16_TYPE
 721 #define INT_FAST16_TYPE ((const char *) NULL)
 722 #endif
 723
 724 #ifndef INT_FAST32_TYPE
 725 #define INT_FAST32_TYPE ((const char *) NULL)
 726 #endif
 727
 728 #ifndef INT_FAST64_TYPE
 729 #define INT_FAST64_TYPE ((const char *) NULL)
 730 #endif
 731
 732 #ifndef UINT_FAST8_TYPE
 733 #define UINT_FAST8_TYPE ((const char *) NULL)
 734 #endif
 735
 736 #ifndef UINT_FAST16_TYPE
 737 #define UINT_FAST16_TYPE ((const char *) NULL)
 738 #endif
 739
 740 #ifndef UINT_FAST32_TYPE
 741 #define UINT_FAST32_TYPE ((const char *) NULL)
 742 #endif
 743
 744 #ifndef UINT_FAST64_TYPE
 745 #define UINT_FAST64_TYPE ((const char *) NULL)
 746 #endif
 747
 748 #ifndef INTPTR_TYPE
 749 #define INTPTR_TYPE ((const char *) NULL)
 750 #endif
 751
 752 #ifndef UINTPTR_TYPE
 753 #define UINTPTR_TYPE ((const char *) NULL)
 754 #endif
 755
 756 /* Width in bits of a pointer.  Mind the value of the macro `Pmode'.  */
 757 #ifndef POINTER_SIZE
 758 #define POINTER_SIZE BITS_PER_WORD
 759 #endif
 760 #ifndef POINTER_SIZE_UNITS
 761 #define POINTER_SIZE_UNITS ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)
 762 #endif
 763
 764
 765 #ifndef PIC_OFFSET_TABLE_REGNUM
 766 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
 767 #endif
 768
 769 #ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
 770 #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 0
 771 #endif
 772
 773 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
 774 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
 775 #endif
 776
 777 #ifndef TARGET_DECLSPEC
 778 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
 779 /* If the target supports the "dllimport" attribute, users are
 780    probably used to the "__declspec" syntax.  */
 781 #define TARGET_DECLSPEC 1
 782 #else
 783 #define TARGET_DECLSPEC 0
 784 #endif
 785 #endif
 786
 787 /* By default, the preprocessor should be invoked the same way in C++
 788    as in C.  */
 789 #ifndef CPLUSPLUS_CPP_SPEC
 790 #ifdef CPP_SPEC
 791 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
 792 #endif
 793 #endif
 794
 795 #ifndef ACCUMULATE_OUTGOING_ARGS
 796 #define ACCUMULATE_OUTGOING_ARGS 0
 797 #endif
 798
 799 /* By default, use the GNU runtime for Objective C.  */
 800 #ifndef NEXT_OBJC_RUNTIME
 801 #define NEXT_OBJC_RUNTIME 0
 802 #endif
 803
 804 /* Decide whether a function's arguments should be processed
 805    from first to last or from last to first.
 806
 807    They should if the stack and args grow in opposite directions, but
 808    only if we have push insns.  */
 809
 810 #ifdef PUSH_ROUNDING
 811
 812 #ifndef PUSH_ARGS_REVERSED
 813 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
 814 #define PUSH_ARGS_REVERSED targetm.calls.push_argument (0)
 815 #endif
 816 #endif
 817
 818 #endif
 819
 820 #ifndef PUSH_ARGS_REVERSED
 821 #define PUSH_ARGS_REVERSED 0
 822 #endif
 823
 824 /* Default value for the alignment (in bits) a C conformant malloc has to
 825    provide. This default is intended to be safe and always correct.  */
 826 #ifndef MALLOC_ABI_ALIGNMENT
 827 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
 828 #endif
 829
 830 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
 831    STACK_BOUNDARY is required.  */
 832 #ifndef PREFERRED_STACK_BOUNDARY
 833 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
 834 #endif
 835
 836 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not
 837    defined.  */
 838 #ifndef INCOMING_STACK_BOUNDARY
 839 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY
 840 #endif
 841
 842 #ifndef TARGET_DEFAULT_PACK_STRUCT
 843 #define TARGET_DEFAULT_PACK_STRUCT 0
 844 #endif
 845
 846 /* By default, the vtable entries are void pointers, the so the alignment
 847    is the same as pointer alignment.  The value of this macro specifies
 848    the alignment of the vtable entry in bits.  It should be defined only
 849    when special alignment is necessary.  */
 850 #ifndef TARGET_VTABLE_ENTRY_ALIGN
 851 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
 852 #endif
 853
 854 /* There are a few non-descriptor entries in the vtable at offsets below
 855    zero.  If these entries must be padded (say, to preserve the alignment
 856    specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
 857    words in each data entry.  */
 858 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
 859 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
 860 #endif
 861
 862 /* Decide whether it is safe to use a local alias for a virtual function
 863    when constructing thunks.  */
 864 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
 865 #ifdef ASM_OUTPUT_DEF
 866 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
 867 #else
 868 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
 869 #endif
 870 #endif
 871
 872 /* Decide whether target supports aliases.  */
 873 #ifndef TARGET_SUPPORTS_ALIASES
 874 #ifdef ASM_OUTPUT_DEF
 875 #define TARGET_SUPPORTS_ALIASES 1
 876 #else
 877 #define TARGET_SUPPORTS_ALIASES 0
 878 #endif
 879 #endif
 880
 881 /* Select a format to encode pointers in exception handling data.  We
 882    prefer those that result in fewer dynamic relocations.  Assume no
 883    special support here and encode direct references.  */
 884 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
 885 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  DW_EH_PE_absptr
 886 #endif
 887
 888 /* By default, the C++ compiler will use the lowest bit of the pointer
 889    to function to indicate a pointer-to-member-function points to a
 890    virtual member function.  However, if FUNCTION_BOUNDARY indicates
 891    function addresses aren't always even, the lowest bit of the delta
 892    field will be used.  */
 893 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
 894 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
 895   (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
 896    ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
 897 #endif
 898
 899 #ifndef DEFAULT_GDB_EXTENSIONS
 900 #define DEFAULT_GDB_EXTENSIONS 1
 901 #endif
 902
 903 /* If more than one debugging type is supported, you must define
 904    PREFERRED_DEBUGGING_TYPE to choose the default.  */
 905
 906 #if 1 < (defined (DBX_DEBUGGING_INFO) \
 907          + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
 908          + defined (VMS_DEBUGGING_INFO))
 909 #ifndef PREFERRED_DEBUGGING_TYPE
 910 #error You must define PREFERRED_DEBUGGING_TYPE
 911 #endif /* no PREFERRED_DEBUGGING_TYPE */
 912
 913 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
 914    here so other code needn't care.  */
 915 #elif defined DBX_DEBUGGING_INFO
 916 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 917
 918 #elif defined DWARF2_DEBUGGING_INFO || defined DWARF2_LINENO_DEBUGGING_INFO
 919 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 920
 921 #elif defined VMS_DEBUGGING_INFO
 922 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
 923
 924 #elif defined XCOFF_DEBUGGING_INFO
 925 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
 926
 927 #else
 928 /* No debugging format is supported by this target.  */
 929 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
 930 #endif
 931
 932 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
 933 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
 934 #endif
 935
 936 /* True if the targets integer-comparison functions return { 0, 1, 2
 937    } to indicate { <, ==, > }.  False if { -1, 0, 1 } is used
 938    instead.  The libgcc routines are biased.  */
 939 #ifndef TARGET_LIB_INT_CMP_BIASED
 940 #define TARGET_LIB_INT_CMP_BIASED (true)
 941 #endif
 942
 943 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
 944    then the word-endianness is the same as for integers.  */
 945 #ifndef FLOAT_WORDS_BIG_ENDIAN
 946 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 947 #endif
 948
 949 #ifndef REG_WORDS_BIG_ENDIAN
 950 #define REG_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 951 #endif
 952
 953
 954 #ifndef TARGET_DEC_EVAL_METHOD
 955 #define TARGET_DEC_EVAL_METHOD 2
 956 #endif
 957
 958 #ifndef HAS_LONG_COND_BRANCH
 959 #define HAS_LONG_COND_BRANCH 0
 960 #endif
 961
 962 #ifndef HAS_LONG_UNCOND_BRANCH
 963 #define HAS_LONG_UNCOND_BRANCH 0
 964 #endif
 965
 966 /* Determine whether __cxa_atexit, rather than atexit, is used to
 967    register C++ destructors for local statics and global objects.  */
 968 #ifndef DEFAULT_USE_CXA_ATEXIT
 969 #define DEFAULT_USE_CXA_ATEXIT 0
 970 #endif
 971
 972 #if GCC_VERSION >= 3000 && defined IN_GCC
 973 /* These old constraint macros shouldn't appear anywhere in a
 974    configuration using MD constraint definitions.  */
 975 #endif
 976
 977 /* Determin whether the target runtime library is Bionic */
 978 #ifndef TARGET_HAS_BIONIC
 979 #define TARGET_HAS_BIONIC 0
 980 #endif
 981
 982 /* Indicate that CLZ and CTZ are undefined at zero.  */
 983 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
 984 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
 985 #endif
 986 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
 987 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
 988 #endif
 989
 990 /* Provide a default value for STORE_FLAG_VALUE.  */
 991 #ifndef STORE_FLAG_VALUE
 992 #define STORE_FLAG_VALUE  1
 993 #endif
 994
 995 /* This macro is used to determine what the largest unit size that
 996    move_by_pieces can use is.  */
 997
 998 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
 999    move efficiently, as opposed to  MOVE_MAX which is the maximum
1000    number of bytes we can move with a single instruction.  */
1001
1002 #ifndef MOVE_MAX_PIECES
1003 #define MOVE_MAX_PIECES   MOVE_MAX
1004 #endif
1005
1006 /* STORE_MAX_PIECES is the number of bytes at a time that we can
1007    store efficiently.  Due to internal GCC limitations, this is
1008    MOVE_MAX_PIECES limited by the number of bytes GCC can represent
1009    for an immediate constant.  */
1010
1011 #ifndef STORE_MAX_PIECES
1012 #define STORE_MAX_PIECES  MIN (MOVE_MAX_PIECES, 2 * sizeof (HOST_WIDE_INT))
1013 #endif
1014
1015 /* Likewise for block comparisons.  */
1016 #ifndef COMPARE_MAX_PIECES
1017 #define COMPARE_MAX_PIECES  MOVE_MAX_PIECES
1018 #endif
1019
1020 #ifndef MAX_MOVE_MAX
1021 #define MAX_MOVE_MAX MOVE_MAX
1022 #endif
1023
1024 #ifndef MIN_UNITS_PER_WORD
1025 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
1026 #endif
1027
1028 #ifndef MAX_BITS_PER_WORD
1029 #define MAX_BITS_PER_WORD BITS_PER_WORD
1030 #endif
1031
1032 #ifndef STACK_POINTER_OFFSET
1033 #define STACK_POINTER_OFFSET    0
1034 #endif
1035
1036 #ifndef LOCAL_REGNO
1037 #define LOCAL_REGNO(REGNO)  0
1038 #endif
1039
1040 #ifndef HONOR_REG_ALLOC_ORDER
1041 #define HONOR_REG_ALLOC_ORDER 0
1042 #endif
1043
1044 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1045    the stack pointer does not matter.  The value is tested only in
1046    functions that have frame pointers.  */
1047 #ifndef EXIT_IGNORE_STACK
1048 #define EXIT_IGNORE_STACK 0
1049 #endif
1050
1051 /* Assume that case vectors are not pc-relative.  */
1052 #ifndef CASE_VECTOR_PC_RELATIVE
1053 #define CASE_VECTOR_PC_RELATIVE 0
1054 #endif
1055
1056 /* Force minimum alignment to be able to use the least significant bits
1057    for distinguishing descriptor addresses from code addresses.  */
1058 #define FUNCTION_ALIGNMENT(ALIGN)                                       \
1059   (lang_hooks.custom_function_descriptors                               \
1060    && targetm.calls.custom_function_descriptors > 0                     \
1061    ? MAX ((ALIGN),                                              \
1062           2 * targetm.calls.custom_function_descriptors * BITS_PER_UNIT)\
1063    : (ALIGN))
1064
1065 /* Assume that trampolines need function alignment.  */
1066 #ifndef TRAMPOLINE_ALIGNMENT
1067 #define TRAMPOLINE_ALIGNMENT FUNCTION_ALIGNMENT (FUNCTION_BOUNDARY)
1068 #endif
1069
1070 /* Register mappings for target machines without register windows.  */
1071 #ifndef INCOMING_REGNO
1072 #define INCOMING_REGNO(N) (N)
1073 #endif
1074
1075 #ifndef OUTGOING_REGNO
1076 #define OUTGOING_REGNO(N) (N)
1077 #endif
1078
1079 #ifndef SHIFT_COUNT_TRUNCATED
1080 #define SHIFT_COUNT_TRUNCATED 0
1081 #endif
1082
1083 #ifndef LEGITIMATE_PIC_OPERAND_P
1084 #define LEGITIMATE_PIC_OPERAND_P(X) 1
1085 #endif
1086
1087 #ifndef TARGET_MEM_CONSTRAINT
1088 #define TARGET_MEM_CONSTRAINT 'm'
1089 #endif
1090
1091 #ifndef REVERSIBLE_CC_MODE
1092 #define REVERSIBLE_CC_MODE(MODE) 0
1093 #endif
1094
1095 /* Biggest alignment supported by the object file format of this machine.  */
1096 #ifndef MAX_OFILE_ALIGNMENT
1097 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
1098 #endif
1099
1100 #ifndef FRAME_GROWS_DOWNWARD
1101 #define FRAME_GROWS_DOWNWARD 0
1102 #endif
1103
1104 #ifndef RETURN_ADDR_IN_PREVIOUS_FRAME
1105 #define RETURN_ADDR_IN_PREVIOUS_FRAME 0
1106 #endif
1107
1108 /* On most machines, the CFA coincides with the first incoming parm.  */
1109 #ifndef ARG_POINTER_CFA_OFFSET
1110 #define ARG_POINTER_CFA_OFFSET(FNDECL) \
1111   (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
1112 #endif
1113
1114 /* On most machines, we use the CFA as DW_AT_frame_base.  */
1115 #ifndef CFA_FRAME_BASE_OFFSET
1116 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0
1117 #endif
1118
1119 /* The offset from the incoming value of %sp to the top of the stack frame
1120    for the current function.  */
1121 #ifndef INCOMING_FRAME_SP_OFFSET
1122 #define INCOMING_FRAME_SP_OFFSET 0
1123 #endif
1124
1125 #ifndef HARD_REGNO_NREGS_HAS_PADDING
1126 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
1127 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
1128 #endif
1129
1130 #ifndef OUTGOING_REG_PARM_STACK_SPACE
1131 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
1132 #endif
1133
1134 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
1135    the backend.  MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
1136    effort stack alignment supported by the backend.  If the backend
1137    supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
1138    MAX_STACK_ALIGNMENT are the same.  Otherwise, the incoming stack
1139    boundary will limit the maximum guaranteed stack alignment.  */
1140 #ifdef MAX_STACK_ALIGNMENT
1141 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
1142 #else
1143 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY
1144 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
1145 #endif
1146
1147 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
1148
1149 #ifndef LOCAL_ALIGNMENT
1150 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
1151 #endif
1152
1153 #ifndef STACK_SLOT_ALIGNMENT
1154 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
1155   ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
1156 #endif
1157
1158 #ifndef LOCAL_DECL_ALIGNMENT
1159 #define LOCAL_DECL_ALIGNMENT(DECL) \
1160   LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
1161 #endif
1162
1163 #ifndef MINIMUM_ALIGNMENT
1164 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN)
1165 #endif
1166
1167 /* Alignment value for attribute ((aligned)).  */
1168 #ifndef ATTRIBUTE_ALIGNED_VALUE
1169 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
1170 #endif
1171
1172 /* For most ports anything that evaluates to a constant symbolic
1173    or integer value is acceptable as a constant address.  */
1174 #ifndef CONSTANT_ADDRESS_P
1175 #define CONSTANT_ADDRESS_P(X)   (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE)
1176 #endif
1177
1178 #ifndef MAX_FIXED_MODE_SIZE
1179 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
1180 #endif
1181
1182 /* Nonzero if structures and unions should be returned in memory.
1183
1184    This should only be defined if compatibility with another compiler or
1185    with an ABI is needed, because it results in slower code.  */
1186
1187 #ifndef DEFAULT_PCC_STRUCT_RETURN
1188 #define DEFAULT_PCC_STRUCT_RETURN 1
1189 #endif
1190
1191 #ifndef PCC_BITFIELD_TYPE_MATTERS
1192 #define PCC_BITFIELD_TYPE_MATTERS false
1193 #endif
1194
1195 #ifndef INSN_SETS_ARE_DELAYED
1196 #define INSN_SETS_ARE_DELAYED(INSN) false
1197 #endif
1198
1199 #ifndef INSN_REFERENCES_ARE_DELAYED
1200 #define INSN_REFERENCES_ARE_DELAYED(INSN) false
1201 #endif
1202
1203 #ifndef NO_FUNCTION_CSE
1204 #define NO_FUNCTION_CSE false
1205 #endif
1206
1207 #ifndef HARD_REGNO_RENAME_OK
1208 #define HARD_REGNO_RENAME_OK(FROM, TO) true
1209 #endif
1210
1211 #ifndef EPILOGUE_USES
1212 #define EPILOGUE_USES(REG) false
1213 #endif
1214
1215 #ifndef ARGS_GROW_DOWNWARD
1216 #define ARGS_GROW_DOWNWARD 0
1217 #endif
1218
1219 #ifndef STACK_GROWS_DOWNWARD
1220 #define STACK_GROWS_DOWNWARD 0
1221 #endif
1222
1223 #ifndef STACK_PUSH_CODE
1224 #if STACK_GROWS_DOWNWARD
1225 #define STACK_PUSH_CODE PRE_DEC
1226 #else
1227 #define STACK_PUSH_CODE PRE_INC
1228 #endif
1229 #endif
1230
1231 /* Default value for flag_pie when flag_pie is initialized to -1:
1232    --enable-default-pie: Default flag_pie to -fPIE.
1233    --disable-default-pie: Default flag_pie to 0.
1234  */
1235 #ifdef ENABLE_DEFAULT_PIE
1236 # ifndef DEFAULT_FLAG_PIE
1237 #  define DEFAULT_FLAG_PIE 2
1238 # endif
1239 #else
1240 # define DEFAULT_FLAG_PIE 0
1241 #endif
1242
1243 #ifndef SWITCHABLE_TARGET
1244 #define SWITCHABLE_TARGET 0
1245 #endif
1246
1247 /* If the target supports integers that are wider than two
1248    HOST_WIDE_INTs on the host compiler, then the target should define
1249    TARGET_SUPPORTS_WIDE_INT and make the appropriate fixups.
1250    Otherwise the compiler really is not robust.  */
1251 #ifndef TARGET_SUPPORTS_WIDE_INT
1252 #define TARGET_SUPPORTS_WIDE_INT 0
1253 #endif
1254
1255 #ifndef SHORT_IMMEDIATES_SIGN_EXTEND
1256 #define SHORT_IMMEDIATES_SIGN_EXTEND 0
1257 #endif
1258
1259 #ifndef WORD_REGISTER_OPERATIONS
1260 #define WORD_REGISTER_OPERATIONS 0
1261 #endif
1262
1263 #ifndef LOAD_EXTEND_OP
1264 #define LOAD_EXTEND_OP(M) UNKNOWN
1265 #endif
1266
1267 #ifndef INITIAL_FRAME_ADDRESS_RTX
1268 #define INITIAL_FRAME_ADDRESS_RTX NULL
1269 #endif
1270
1271 #ifndef SETUP_FRAME_ADDRESSES
1272 #define SETUP_FRAME_ADDRESSES() do { } while (0)
1273 #endif
1274
1275 #ifndef DYNAMIC_CHAIN_ADDRESS
1276 #define DYNAMIC_CHAIN_ADDRESS(x) (x)
1277 #endif
1278
1279 #ifndef FRAME_ADDR_RTX
1280 #define FRAME_ADDR_RTX(x) (x)
1281 #endif
1282
1283 #ifndef REVERSE_CONDITION
1284 #define REVERSE_CONDITION(code, mode) reverse_condition (code)
1285 #endif
1286
1287 #ifndef TARGET_PECOFF
1288 #define TARGET_PECOFF 0
1289 #endif
1290
1291 #ifndef TARGET_COFF
1292 #define TARGET_COFF 0
1293 #endif
1294
1295 #ifndef EH_RETURN_HANDLER_RTX
1296 #define EH_RETURN_HANDLER_RTX NULL
1297 #endif
1298
1299 #ifdef GCC_INSN_FLAGS_H
1300 /* Dependent default target macro definitions
1301
1302    This section of defaults.h defines target macros that depend on generated
1303    headers.  This is a bit awkward:  We want to put all default definitions
1304    for target macros in defaults.h, but some of the defaults depend on the
1305    HAVE_* flags defines of insn-flags.h.  But insn-flags.h is not always
1306    included by files that do include defaults.h.
1307
1308    Fortunately, the default macro definitions that depend on the HAVE_*
1309    macros are also the ones that will only be used inside GCC itself, i.e.
1310    not in the gen* programs or in target objects like libgcc.
1311
1312    Obviously, it would be best to keep this section of defaults.h as small
1313    as possible, by converting the macros defined below to target hooks or
1314    functions.
1315 */
1316
1317 /* The default branch cost is 1.  */
1318 #ifndef BRANCH_COST
1319 #define BRANCH_COST(speed_p, predictable_p) 1
1320 #endif
1321
1322 /* If a memory-to-memory move would take MOVE_RATIO or more simple
1323    move-instruction sequences, we will do a cpymem or libcall instead.  */
1324
1325 #ifndef MOVE_RATIO
1326 #if defined (HAVE_cpymemqi) || defined (HAVE_cpymemhi) || defined (HAVE_cpymemsi) || defined (HAVE_cpymemdi) || defined (HAVE_cpymemti)
1327 #define MOVE_RATIO(speed) 2
1328 #else
1329 /* If we are optimizing for space (-Os), cut down the default move ratio.  */
1330 #define MOVE_RATIO(speed) ((speed) ? 15 : 3)
1331 #endif
1332 #endif
1333
1334 /* If a clear memory operation would take CLEAR_RATIO or more simple
1335    move-instruction sequences, we will do a setmem or libcall instead.  */
1336
1337 #ifndef CLEAR_RATIO
1338 #if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
1339 #define CLEAR_RATIO(speed) 2
1340 #else
1341 /* If we are optimizing for space, cut down the default clear ratio.  */
1342 #define CLEAR_RATIO(speed) ((speed) ? 15 :3)
1343 #endif
1344 #endif
1345
1346 /* If a memory set (to value other than zero) operation would take
1347    SET_RATIO or more simple move-instruction sequences, we will do a setmem
1348    or libcall instead.  */
1349 #ifndef SET_RATIO
1350 #define SET_RATIO(speed) MOVE_RATIO (speed)
1351 #endif
1352
1353 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
1354    Normally move_insn, so Pmode stack pointer.  */
1355
1356 #ifndef STACK_SAVEAREA_MODE
1357 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
1358 #endif
1359
1360 /* Supply a default definition of STACK_SIZE_MODE for
1361    allocate_dynamic_stack_space.  Normally PLUS/MINUS, so word_mode.  */
1362
1363 #ifndef STACK_SIZE_MODE
1364 #define STACK_SIZE_MODE word_mode
1365 #endif
1366
1367 /* Default value for flag_stack_protect when flag_stack_protect is initialized to -1:
1368    --enable-default-ssp: Default flag_stack_protect to -fstack-protector-strong.
1369    --disable-default-ssp: Default flag_stack_protect to 0.
1370  */
1371 #ifdef ENABLE_DEFAULT_SSP
1372 # ifndef DEFAULT_FLAG_SSP
1373 #  define DEFAULT_FLAG_SSP 3
1374 # endif
1375 #else
1376 # define DEFAULT_FLAG_SSP 0
1377 #endif
1378
1379 /* Provide default values for the macros controlling stack checking.  */
1380
1381 /* The default is neither full builtin stack checking...  */
1382 #ifndef STACK_CHECK_BUILTIN
1383 #define STACK_CHECK_BUILTIN 0
1384 #endif
1385
1386 /* ...nor static builtin stack checking.  */
1387 #ifndef STACK_CHECK_STATIC_BUILTIN
1388 #define STACK_CHECK_STATIC_BUILTIN 0
1389 #endif
1390
1391 /* The default interval is one page (4096 bytes).  */
1392 #ifndef STACK_CHECK_PROBE_INTERVAL_EXP
1393 #define STACK_CHECK_PROBE_INTERVAL_EXP 12
1394 #endif
1395
1396 /* The default is not to move the stack pointer.  */
1397 #ifndef STACK_CHECK_MOVING_SP
1398 #define STACK_CHECK_MOVING_SP 0
1399 #endif
1400
1401 /* This is a kludge to try to capture the discrepancy between the old
1402    mechanism (generic stack checking) and the new mechanism (static
1403    builtin stack checking).  STACK_CHECK_PROTECT needs to be bumped
1404    for the latter because part of the protection area is effectively
1405    included in STACK_CHECK_MAX_FRAME_SIZE for the former.  */
1406 #ifdef STACK_CHECK_PROTECT
1407 #define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
1408 #else
1409 #define STACK_OLD_CHECK_PROTECT                                         \
1410  (!global_options.x_flag_exceptions                                     \
1411   ? 75 * UNITS_PER_WORD                                                 \
1412   : targetm_common.except_unwind_info (&global_options) == UI_SJLJ      \
1413     ? 4 * 1024                                                          \
1414     : 8 * 1024)
1415 #endif
1416
1417 /* Minimum amount of stack required to recover from an anticipated stack
1418    overflow detection.  The default value conveys an estimate of the amount
1419    of stack required to propagate an exception.  */
1420 #ifndef STACK_CHECK_PROTECT
1421 #define STACK_CHECK_PROTECT                                             \
1422  (!global_options.x_flag_exceptions                                     \
1423   ? 4 * 1024                                                            \
1424   : targetm_common.except_unwind_info (&global_options) == UI_SJLJ      \
1425     ? 8 * 1024                                                          \
1426     : 12 * 1024)
1427 #endif
1428
1429 /* Make the maximum frame size be the largest we can and still only need
1430    one probe per function.  */
1431 #ifndef STACK_CHECK_MAX_FRAME_SIZE
1432 #define STACK_CHECK_MAX_FRAME_SIZE \
1433   ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD)
1434 #endif
1435
1436 /* This is arbitrary, but should be large enough everywhere.  */
1437 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
1438 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
1439 #endif
1440
1441 /* Provide a reasonable default for the maximum size of an object to
1442    allocate in the fixed frame.  We may need to be able to make this
1443    controllable by the user at some point.  */
1444 #ifndef STACK_CHECK_MAX_VAR_SIZE
1445 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
1446 #endif
1447
1448 /* By default, the C++ compiler will use function addresses in the
1449    vtable entries.  Setting this nonzero tells the compiler to use
1450    function descriptors instead.  The value of this macro says how
1451    many words wide the descriptor is (normally 2).  It is assumed
1452    that the address of a function descriptor may be treated as a
1453    pointer to a function.  */
1454 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
1455 #define TARGET_VTABLE_USES_DESCRIPTORS 0
1456 #endif
1457
1458 #endif /* GCC_INSN_FLAGS_H  */
1459
1460 #ifndef DWARF_GNAT_ENCODINGS_DEFAULT
1461 #define DWARF_GNAT_ENCODINGS_DEFAULT DWARF_GNAT_ENCODINGS_GDB
1462 #endif
1463
1464 #ifndef USED_FOR_TARGET
1465 /* Done this way to keep gengtype happy.  */
1466 #if BITS_PER_UNIT == 8
1467 #define TARGET_UNIT uint8_t
1468 #elif BITS_PER_UNIT == 16
1469 #define TARGET_UNIT uint16_t
1470 #elif BITS_PER_UNIT == 32
1471 #define TARGET_UNIT uint32_t
1472 #else
1473 #error Unknown BITS_PER_UNIT
1474 #endif
1475 typedef TARGET_UNIT target_unit;
1476 #endif
1477
1478 #endif  /* ! GCC_DEFAULTS_H */