gcc/defaults.h

   1 /* Definitions of various defaults for tm.h macros.
   2    Copyright (C) 1992-2018 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 /* Number of hardware registers that go into the DWARF-2 unwind info.
 396    If not defined, equals FIRST_PSEUDO_REGISTER  */
 397
 398 #ifndef DWARF_FRAME_REGISTERS
 399 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
 400 #endif
 401
 402 /* Offsets recorded in opcodes are a multiple of this alignment factor.  */
 403 #ifndef DWARF_CIE_DATA_ALIGNMENT
 404 #ifdef STACK_GROWS_DOWNWARD
 405 #define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD))
 406 #else
 407 #define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD)
 408 #endif
 409 #endif
 410
 411 /* The DWARF 2 CFA column which tracks the return address.  Normally this
 412    is the column for PC, or the first column after all of the hard
 413    registers.  */
 414 #ifndef DWARF_FRAME_RETURN_COLUMN
 415 #ifdef PC_REGNUM
 416 #define DWARF_FRAME_RETURN_COLUMN       DWARF_FRAME_REGNUM (PC_REGNUM)
 417 #else
 418 #define DWARF_FRAME_RETURN_COLUMN       DWARF_FRAME_REGISTERS
 419 #endif
 420 #endif
 421
 422 /* How to renumber registers for dbx and gdb.  If not defined, assume
 423    no renumbering is necessary.  */
 424
 425 #ifndef DBX_REGISTER_NUMBER
 426 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 427 #endif
 428
 429 /* The mapping from gcc register number to DWARF 2 CFA column number.
 430    By default, we just provide columns for all registers.  */
 431 #ifndef DWARF_FRAME_REGNUM
 432 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
 433 #endif
 434
 435 /* The mapping from dwarf CFA reg number to internal dwarf reg numbers.  */
 436 #ifndef DWARF_REG_TO_UNWIND_COLUMN
 437 #define DWARF_REG_TO_UNWIND_COLUMN(REGNO) (REGNO)
 438 #endif
 439
 440 /* Map register numbers held in the call frame info that gcc has
 441    collected using DWARF_FRAME_REGNUM to those that should be output in
 442    .debug_frame and .eh_frame.  */
 443 #ifndef DWARF2_FRAME_REG_OUT
 444 #define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) (REGNO)
 445 #endif
 446
 447 /* The size of addresses as they appear in the Dwarf 2 data.
 448    Some architectures use word addresses to refer to code locations,
 449    but Dwarf 2 info always uses byte addresses.  On such machines,
 450    Dwarf 2 addresses need to be larger than the architecture's
 451    pointers.  */
 452 #ifndef DWARF2_ADDR_SIZE
 453 #define DWARF2_ADDR_SIZE ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)
 454 #endif
 455
 456 /* The size in bytes of a DWARF field indicating an offset or length
 457    relative to a debug info section, specified to be 4 bytes in the
 458    DWARF-2 specification.  The SGI/MIPS ABI defines it to be the same
 459    as PTR_SIZE.  */
 460 #ifndef DWARF_OFFSET_SIZE
 461 #define DWARF_OFFSET_SIZE 4
 462 #endif
 463
 464 /* The size in bytes of a DWARF 4 type signature.  */
 465 #ifndef DWARF_TYPE_SIGNATURE_SIZE
 466 #define DWARF_TYPE_SIGNATURE_SIZE 8
 467 #endif
 468
 469 /* Default sizes for base C types.  If the sizes are different for
 470    your target, you should override these values by defining the
 471    appropriate symbols in your tm.h file.  */
 472
 473 #ifndef BITS_PER_WORD
 474 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
 475 #endif
 476
 477 #ifndef CHAR_TYPE_SIZE
 478 #define CHAR_TYPE_SIZE BITS_PER_UNIT
 479 #endif
 480
 481 #ifndef BOOL_TYPE_SIZE
 482 /* `bool' has size and alignment `1', on almost all platforms.  */
 483 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
 484 #endif
 485
 486 #ifndef SHORT_TYPE_SIZE
 487 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
 488 #endif
 489
 490 #ifndef INT_TYPE_SIZE
 491 #define INT_TYPE_SIZE BITS_PER_WORD
 492 #endif
 493
 494 #ifndef LONG_TYPE_SIZE
 495 #define LONG_TYPE_SIZE BITS_PER_WORD
 496 #endif
 497
 498 #ifndef LONG_LONG_TYPE_SIZE
 499 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
 500 #endif
 501
 502 #ifndef WCHAR_TYPE_SIZE
 503 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
 504 #endif
 505
 506 #ifndef FLOAT_TYPE_SIZE
 507 #define FLOAT_TYPE_SIZE BITS_PER_WORD
 508 #endif
 509
 510 #ifndef DOUBLE_TYPE_SIZE
 511 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 512 #endif
 513
 514 #ifndef LONG_DOUBLE_TYPE_SIZE
 515 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 516 #endif
 517
 518 #ifndef DECIMAL32_TYPE_SIZE
 519 #define DECIMAL32_TYPE_SIZE 32
 520 #endif
 521
 522 #ifndef DECIMAL64_TYPE_SIZE
 523 #define DECIMAL64_TYPE_SIZE 64
 524 #endif
 525
 526 #ifndef DECIMAL128_TYPE_SIZE
 527 #define DECIMAL128_TYPE_SIZE 128
 528 #endif
 529
 530 #ifndef SHORT_FRACT_TYPE_SIZE
 531 #define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT
 532 #endif
 533
 534 #ifndef FRACT_TYPE_SIZE
 535 #define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2)
 536 #endif
 537
 538 #ifndef LONG_FRACT_TYPE_SIZE
 539 #define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4)
 540 #endif
 541
 542 #ifndef LONG_LONG_FRACT_TYPE_SIZE
 543 #define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8)
 544 #endif
 545
 546 #ifndef SHORT_ACCUM_TYPE_SIZE
 547 #define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2)
 548 #endif
 549
 550 #ifndef ACCUM_TYPE_SIZE
 551 #define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2)
 552 #endif
 553
 554 #ifndef LONG_ACCUM_TYPE_SIZE
 555 #define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2)
 556 #endif
 557
 558 #ifndef LONG_LONG_ACCUM_TYPE_SIZE
 559 #define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2)
 560 #endif
 561
 562 /* We let tm.h override the types used here, to handle trivial differences
 563    such as the choice of unsigned int or long unsigned int for size_t.
 564    When machines start needing nontrivial differences in the size type,
 565    it would be best to do something here to figure out automatically
 566    from other information what type to use.  */
 567
 568 #ifndef SIZE_TYPE
 569 #define SIZE_TYPE "long unsigned int"
 570 #endif
 571
 572 #ifndef SIZETYPE
 573 #define SIZETYPE SIZE_TYPE
 574 #endif
 575
 576 #ifndef PID_TYPE
 577 #define PID_TYPE "int"
 578 #endif
 579
 580 /* If GCC knows the exact uint_least16_t and uint_least32_t types from
 581    <stdint.h>, use them for char16_t and char32_t.  Otherwise, use
 582    these guesses; getting the wrong type of a given width will not
 583    affect C++ name mangling because in C++ these are distinct types
 584    not typedefs.  */
 585
 586 #ifdef UINT_LEAST16_TYPE
 587 #define CHAR16_TYPE UINT_LEAST16_TYPE
 588 #else
 589 #define CHAR16_TYPE "short unsigned int"
 590 #endif
 591
 592 #ifdef UINT_LEAST32_TYPE
 593 #define CHAR32_TYPE UINT_LEAST32_TYPE
 594 #else
 595 #define CHAR32_TYPE "unsigned int"
 596 #endif
 597
 598 #ifndef WCHAR_TYPE
 599 #define WCHAR_TYPE "int"
 600 #endif
 601
 602 /* WCHAR_TYPE gets overridden by -fshort-wchar.  */
 603 #define MODIFIED_WCHAR_TYPE \
 604         (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE)
 605
 606 #ifndef PTRDIFF_TYPE
 607 #define PTRDIFF_TYPE "long int"
 608 #endif
 609
 610 #ifndef WINT_TYPE
 611 #define WINT_TYPE "unsigned int"
 612 #endif
 613
 614 #ifndef INTMAX_TYPE
 615 #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)     \
 616                      ? "int"                                    \
 617                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 618                         ? "long int"                            \
 619                         : "long long int"))
 620 #endif
 621
 622 #ifndef UINTMAX_TYPE
 623 #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)    \
 624                      ? "unsigned int"                           \
 625                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 626                         ? "long unsigned int"                   \
 627                         : "long long unsigned int"))
 628 #endif
 629
 630
 631 /* There are no default definitions of these <stdint.h> types.  */
 632
 633 #ifndef SIG_ATOMIC_TYPE
 634 #define SIG_ATOMIC_TYPE ((const char *) NULL)
 635 #endif
 636
 637 #ifndef INT8_TYPE
 638 #define INT8_TYPE ((const char *) NULL)
 639 #endif
 640
 641 #ifndef INT16_TYPE
 642 #define INT16_TYPE ((const char *) NULL)
 643 #endif
 644
 645 #ifndef INT32_TYPE
 646 #define INT32_TYPE ((const char *) NULL)
 647 #endif
 648
 649 #ifndef INT64_TYPE
 650 #define INT64_TYPE ((const char *) NULL)
 651 #endif
 652
 653 #ifndef UINT8_TYPE
 654 #define UINT8_TYPE ((const char *) NULL)
 655 #endif
 656
 657 #ifndef UINT16_TYPE
 658 #define UINT16_TYPE ((const char *) NULL)
 659 #endif
 660
 661 #ifndef UINT32_TYPE
 662 #define UINT32_TYPE ((const char *) NULL)
 663 #endif
 664
 665 #ifndef UINT64_TYPE
 666 #define UINT64_TYPE ((const char *) NULL)
 667 #endif
 668
 669 #ifndef INT_LEAST8_TYPE
 670 #define INT_LEAST8_TYPE ((const char *) NULL)
 671 #endif
 672
 673 #ifndef INT_LEAST16_TYPE
 674 #define INT_LEAST16_TYPE ((const char *) NULL)
 675 #endif
 676
 677 #ifndef INT_LEAST32_TYPE
 678 #define INT_LEAST32_TYPE ((const char *) NULL)
 679 #endif
 680
 681 #ifndef INT_LEAST64_TYPE
 682 #define INT_LEAST64_TYPE ((const char *) NULL)
 683 #endif
 684
 685 #ifndef UINT_LEAST8_TYPE
 686 #define UINT_LEAST8_TYPE ((const char *) NULL)
 687 #endif
 688
 689 #ifndef UINT_LEAST16_TYPE
 690 #define UINT_LEAST16_TYPE ((const char *) NULL)
 691 #endif
 692
 693 #ifndef UINT_LEAST32_TYPE
 694 #define UINT_LEAST32_TYPE ((const char *) NULL)
 695 #endif
 696
 697 #ifndef UINT_LEAST64_TYPE
 698 #define UINT_LEAST64_TYPE ((const char *) NULL)
 699 #endif
 700
 701 #ifndef INT_FAST8_TYPE
 702 #define INT_FAST8_TYPE ((const char *) NULL)
 703 #endif
 704
 705 #ifndef INT_FAST16_TYPE
 706 #define INT_FAST16_TYPE ((const char *) NULL)
 707 #endif
 708
 709 #ifndef INT_FAST32_TYPE
 710 #define INT_FAST32_TYPE ((const char *) NULL)
 711 #endif
 712
 713 #ifndef INT_FAST64_TYPE
 714 #define INT_FAST64_TYPE ((const char *) NULL)
 715 #endif
 716
 717 #ifndef UINT_FAST8_TYPE
 718 #define UINT_FAST8_TYPE ((const char *) NULL)
 719 #endif
 720
 721 #ifndef UINT_FAST16_TYPE
 722 #define UINT_FAST16_TYPE ((const char *) NULL)
 723 #endif
 724
 725 #ifndef UINT_FAST32_TYPE
 726 #define UINT_FAST32_TYPE ((const char *) NULL)
 727 #endif
 728
 729 #ifndef UINT_FAST64_TYPE
 730 #define UINT_FAST64_TYPE ((const char *) NULL)
 731 #endif
 732
 733 #ifndef INTPTR_TYPE
 734 #define INTPTR_TYPE ((const char *) NULL)
 735 #endif
 736
 737 #ifndef UINTPTR_TYPE
 738 #define UINTPTR_TYPE ((const char *) NULL)
 739 #endif
 740
 741 /* Width in bits of a pointer.  Mind the value of the macro `Pmode'.  */
 742 #ifndef POINTER_SIZE
 743 #define POINTER_SIZE BITS_PER_WORD
 744 #endif
 745 #ifndef POINTER_SIZE_UNITS
 746 #define POINTER_SIZE_UNITS ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)
 747 #endif
 748
 749
 750 #ifndef PIC_OFFSET_TABLE_REGNUM
 751 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
 752 #endif
 753
 754 #ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
 755 #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 0
 756 #endif
 757
 758 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
 759 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
 760 #endif
 761
 762 #ifndef TARGET_DECLSPEC
 763 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
 764 /* If the target supports the "dllimport" attribute, users are
 765    probably used to the "__declspec" syntax.  */
 766 #define TARGET_DECLSPEC 1
 767 #else
 768 #define TARGET_DECLSPEC 0
 769 #endif
 770 #endif
 771
 772 /* By default, the preprocessor should be invoked the same way in C++
 773    as in C.  */
 774 #ifndef CPLUSPLUS_CPP_SPEC
 775 #ifdef CPP_SPEC
 776 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
 777 #endif
 778 #endif
 779
 780 #ifndef ACCUMULATE_OUTGOING_ARGS
 781 #define ACCUMULATE_OUTGOING_ARGS 0
 782 #endif
 783
 784 /* By default, use the GNU runtime for Objective C.  */
 785 #ifndef NEXT_OBJC_RUNTIME
 786 #define NEXT_OBJC_RUNTIME 0
 787 #endif
 788
 789 /* Supply a default definition for PUSH_ARGS.  */
 790 #ifndef PUSH_ARGS
 791 #ifdef PUSH_ROUNDING
 792 #define PUSH_ARGS       !ACCUMULATE_OUTGOING_ARGS
 793 #else
 794 #define PUSH_ARGS       0
 795 #endif
 796 #endif
 797
 798 /* Decide whether a function's arguments should be processed
 799    from first to last or from last to first.
 800
 801    They should if the stack and args grow in opposite directions, but
 802    only if we have push insns.  */
 803
 804 #ifdef PUSH_ROUNDING
 805
 806 #ifndef PUSH_ARGS_REVERSED
 807 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
 808 #define PUSH_ARGS_REVERSED  PUSH_ARGS
 809 #endif
 810 #endif
 811
 812 #endif
 813
 814 #ifndef PUSH_ARGS_REVERSED
 815 #define PUSH_ARGS_REVERSED 0
 816 #endif
 817
 818 /* Default value for the alignment (in bits) a C conformant malloc has to
 819    provide. This default is intended to be safe and always correct.  */
 820 #ifndef MALLOC_ABI_ALIGNMENT
 821 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
 822 #endif
 823
 824 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
 825    STACK_BOUNDARY is required.  */
 826 #ifndef PREFERRED_STACK_BOUNDARY
 827 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
 828 #endif
 829
 830 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not
 831    defined.  */
 832 #ifndef INCOMING_STACK_BOUNDARY
 833 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY
 834 #endif
 835
 836 #ifndef TARGET_DEFAULT_PACK_STRUCT
 837 #define TARGET_DEFAULT_PACK_STRUCT 0
 838 #endif
 839
 840 /* By default, the vtable entries are void pointers, the so the alignment
 841    is the same as pointer alignment.  The value of this macro specifies
 842    the alignment of the vtable entry in bits.  It should be defined only
 843    when special alignment is necessary.  */
 844 #ifndef TARGET_VTABLE_ENTRY_ALIGN
 845 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
 846 #endif
 847
 848 /* There are a few non-descriptor entries in the vtable at offsets below
 849    zero.  If these entries must be padded (say, to preserve the alignment
 850    specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
 851    words in each data entry.  */
 852 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
 853 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
 854 #endif
 855
 856 /* Decide whether it is safe to use a local alias for a virtual function
 857    when constructing thunks.  */
 858 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
 859 #ifdef ASM_OUTPUT_DEF
 860 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
 861 #else
 862 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
 863 #endif
 864 #endif
 865
 866 /* Decide whether target supports aliases.  */
 867 #ifndef TARGET_SUPPORTS_ALIASES
 868 #ifdef ASM_OUTPUT_DEF
 869 #define TARGET_SUPPORTS_ALIASES 1
 870 #else
 871 #define TARGET_SUPPORTS_ALIASES 0
 872 #endif
 873 #endif
 874
 875 /* Select a format to encode pointers in exception handling data.  We
 876    prefer those that result in fewer dynamic relocations.  Assume no
 877    special support here and encode direct references.  */
 878 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
 879 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  DW_EH_PE_absptr
 880 #endif
 881
 882 /* By default, the C++ compiler will use the lowest bit of the pointer
 883    to function to indicate a pointer-to-member-function points to a
 884    virtual member function.  However, if FUNCTION_BOUNDARY indicates
 885    function addresses aren't always even, the lowest bit of the delta
 886    field will be used.  */
 887 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
 888 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
 889   (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
 890    ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
 891 #endif
 892
 893 #ifndef DEFAULT_GDB_EXTENSIONS
 894 #define DEFAULT_GDB_EXTENSIONS 1
 895 #endif
 896
 897 /* If more than one debugging type is supported, you must define
 898    PREFERRED_DEBUGGING_TYPE to choose the default.  */
 899
 900 #if 1 < (defined (DBX_DEBUGGING_INFO) \
 901          + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
 902          + defined (VMS_DEBUGGING_INFO))
 903 #ifndef PREFERRED_DEBUGGING_TYPE
 904 #error You must define PREFERRED_DEBUGGING_TYPE
 905 #endif /* no PREFERRED_DEBUGGING_TYPE */
 906
 907 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
 908    here so other code needn't care.  */
 909 #elif defined DBX_DEBUGGING_INFO
 910 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 911
 912 #elif defined DWARF2_DEBUGGING_INFO || defined DWARF2_LINENO_DEBUGGING_INFO
 913 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 914
 915 #elif defined VMS_DEBUGGING_INFO
 916 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
 917
 918 #elif defined XCOFF_DEBUGGING_INFO
 919 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
 920
 921 #else
 922 /* No debugging format is supported by this target.  */
 923 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
 924 #endif
 925
 926 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
 927 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
 928 #endif
 929
 930 /* True if the targets integer-comparison functions return { 0, 1, 2
 931    } to indicate { <, ==, > }.  False if { -1, 0, 1 } is used
 932    instead.  The libgcc routines are biased.  */
 933 #ifndef TARGET_LIB_INT_CMP_BIASED
 934 #define TARGET_LIB_INT_CMP_BIASED (true)
 935 #endif
 936
 937 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
 938    then the word-endianness is the same as for integers.  */
 939 #ifndef FLOAT_WORDS_BIG_ENDIAN
 940 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 941 #endif
 942
 943 #ifndef REG_WORDS_BIG_ENDIAN
 944 #define REG_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 945 #endif
 946
 947
 948 #ifndef TARGET_DEC_EVAL_METHOD
 949 #define TARGET_DEC_EVAL_METHOD 2
 950 #endif
 951
 952 #ifndef HAS_LONG_COND_BRANCH
 953 #define HAS_LONG_COND_BRANCH 0
 954 #endif
 955
 956 #ifndef HAS_LONG_UNCOND_BRANCH
 957 #define HAS_LONG_UNCOND_BRANCH 0
 958 #endif
 959
 960 /* Determine whether __cxa_atexit, rather than atexit, is used to
 961    register C++ destructors for local statics and global objects.  */
 962 #ifndef DEFAULT_USE_CXA_ATEXIT
 963 #define DEFAULT_USE_CXA_ATEXIT 0
 964 #endif
 965
 966 #if GCC_VERSION >= 3000 && defined IN_GCC
 967 /* These old constraint macros shouldn't appear anywhere in a
 968    configuration using MD constraint definitions.  */
 969 #endif
 970
 971 /* Determin whether the target runtime library is Bionic */
 972 #ifndef TARGET_HAS_BIONIC
 973 #define TARGET_HAS_BIONIC 0
 974 #endif
 975
 976 /* Indicate that CLZ and CTZ are undefined at zero.  */
 977 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
 978 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
 979 #endif
 980 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
 981 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
 982 #endif
 983
 984 /* Provide a default value for STORE_FLAG_VALUE.  */
 985 #ifndef STORE_FLAG_VALUE
 986 #define STORE_FLAG_VALUE  1
 987 #endif
 988
 989 /* This macro is used to determine what the largest unit size that
 990    move_by_pieces can use is.  */
 991
 992 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
 993    move efficiently, as opposed to  MOVE_MAX which is the maximum
 994    number of bytes we can move with a single instruction.  */
 995
 996 #ifndef MOVE_MAX_PIECES
 997 #define MOVE_MAX_PIECES   MOVE_MAX
 998 #endif
 999
1000 /* STORE_MAX_PIECES is the number of bytes at a time that we can
1001    store efficiently.  Due to internal GCC limitations, this is
1002    MOVE_MAX_PIECES limited by the number of bytes GCC can represent
1003    for an immediate constant.  */
1004
1005 #ifndef STORE_MAX_PIECES
1006 #define STORE_MAX_PIECES  MIN (MOVE_MAX_PIECES, 2 * sizeof (HOST_WIDE_INT))
1007 #endif
1008
1009 /* Likewise for block comparisons.  */
1010 #ifndef COMPARE_MAX_PIECES
1011 #define COMPARE_MAX_PIECES  MOVE_MAX_PIECES
1012 #endif
1013
1014 #ifndef MAX_MOVE_MAX
1015 #define MAX_MOVE_MAX MOVE_MAX
1016 #endif
1017
1018 #ifndef MIN_UNITS_PER_WORD
1019 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
1020 #endif
1021
1022 #ifndef MAX_BITS_PER_WORD
1023 #define MAX_BITS_PER_WORD BITS_PER_WORD
1024 #endif
1025
1026 #ifndef STACK_POINTER_OFFSET
1027 #define STACK_POINTER_OFFSET    0
1028 #endif
1029
1030 #ifndef LOCAL_REGNO
1031 #define LOCAL_REGNO(REGNO)  0
1032 #endif
1033
1034 #ifndef HONOR_REG_ALLOC_ORDER
1035 #define HONOR_REG_ALLOC_ORDER 0
1036 #endif
1037
1038 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1039    the stack pointer does not matter.  The value is tested only in
1040    functions that have frame pointers.  */
1041 #ifndef EXIT_IGNORE_STACK
1042 #define EXIT_IGNORE_STACK 0
1043 #endif
1044
1045 /* Assume that case vectors are not pc-relative.  */
1046 #ifndef CASE_VECTOR_PC_RELATIVE
1047 #define CASE_VECTOR_PC_RELATIVE 0
1048 #endif
1049
1050 /* Force minimum alignment to be able to use the least significant bits
1051    for distinguishing descriptor addresses from code addresses.  */
1052 #define FUNCTION_ALIGNMENT(ALIGN)                                       \
1053   (lang_hooks.custom_function_descriptors                               \
1054    && targetm.calls.custom_function_descriptors > 0                     \
1055    ? MAX ((ALIGN),                                              \
1056           2 * targetm.calls.custom_function_descriptors * BITS_PER_UNIT)\
1057    : (ALIGN))
1058
1059 /* Assume that trampolines need function alignment.  */
1060 #ifndef TRAMPOLINE_ALIGNMENT
1061 #define TRAMPOLINE_ALIGNMENT FUNCTION_ALIGNMENT (FUNCTION_BOUNDARY)
1062 #endif
1063
1064 /* Register mappings for target machines without register windows.  */
1065 #ifndef INCOMING_REGNO
1066 #define INCOMING_REGNO(N) (N)
1067 #endif
1068
1069 #ifndef OUTGOING_REGNO
1070 #define OUTGOING_REGNO(N) (N)
1071 #endif
1072
1073 #ifndef SHIFT_COUNT_TRUNCATED
1074 #define SHIFT_COUNT_TRUNCATED 0
1075 #endif
1076
1077 #ifndef LEGITIMATE_PIC_OPERAND_P
1078 #define LEGITIMATE_PIC_OPERAND_P(X) 1
1079 #endif
1080
1081 #ifndef TARGET_MEM_CONSTRAINT
1082 #define TARGET_MEM_CONSTRAINT 'm'
1083 #endif
1084
1085 #ifndef REVERSIBLE_CC_MODE
1086 #define REVERSIBLE_CC_MODE(MODE) 0
1087 #endif
1088
1089 /* Biggest alignment supported by the object file format of this machine.  */
1090 #ifndef MAX_OFILE_ALIGNMENT
1091 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
1092 #endif
1093
1094 #ifndef FRAME_GROWS_DOWNWARD
1095 #define FRAME_GROWS_DOWNWARD 0
1096 #endif
1097
1098 #ifndef RETURN_ADDR_IN_PREVIOUS_FRAME
1099 #define RETURN_ADDR_IN_PREVIOUS_FRAME 0
1100 #endif
1101
1102 /* On most machines, the CFA coincides with the first incoming parm.  */
1103 #ifndef ARG_POINTER_CFA_OFFSET
1104 #define ARG_POINTER_CFA_OFFSET(FNDECL) \
1105   (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
1106 #endif
1107
1108 /* On most machines, we use the CFA as DW_AT_frame_base.  */
1109 #ifndef CFA_FRAME_BASE_OFFSET
1110 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0
1111 #endif
1112
1113 /* The offset from the incoming value of %sp to the top of the stack frame
1114    for the current function.  */
1115 #ifndef INCOMING_FRAME_SP_OFFSET
1116 #define INCOMING_FRAME_SP_OFFSET 0
1117 #endif
1118
1119 #ifndef HARD_REGNO_NREGS_HAS_PADDING
1120 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
1121 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
1122 #endif
1123
1124 #ifndef OUTGOING_REG_PARM_STACK_SPACE
1125 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
1126 #endif
1127
1128 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
1129    the backend.  MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
1130    effort stack alignment supported by the backend.  If the backend
1131    supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
1132    MAX_STACK_ALIGNMENT are the same.  Otherwise, the incoming stack
1133    boundary will limit the maximum guaranteed stack alignment.  */
1134 #ifdef MAX_STACK_ALIGNMENT
1135 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
1136 #else
1137 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY
1138 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
1139 #endif
1140
1141 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
1142
1143 #ifndef LOCAL_ALIGNMENT
1144 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
1145 #endif
1146
1147 #ifndef STACK_SLOT_ALIGNMENT
1148 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
1149   ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
1150 #endif
1151
1152 #ifndef LOCAL_DECL_ALIGNMENT
1153 #define LOCAL_DECL_ALIGNMENT(DECL) \
1154   LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
1155 #endif
1156
1157 #ifndef MINIMUM_ALIGNMENT
1158 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN)
1159 #endif
1160
1161 /* Alignment value for attribute ((aligned)).  */
1162 #ifndef ATTRIBUTE_ALIGNED_VALUE
1163 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
1164 #endif
1165
1166 /* For most ports anything that evaluates to a constant symbolic
1167    or integer value is acceptable as a constant address.  */
1168 #ifndef CONSTANT_ADDRESS_P
1169 #define CONSTANT_ADDRESS_P(X)   (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE)
1170 #endif
1171
1172 #ifndef MAX_FIXED_MODE_SIZE
1173 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
1174 #endif
1175
1176 /* Nonzero if structures and unions should be returned in memory.
1177
1178    This should only be defined if compatibility with another compiler or
1179    with an ABI is needed, because it results in slower code.  */
1180
1181 #ifndef DEFAULT_PCC_STRUCT_RETURN
1182 #define DEFAULT_PCC_STRUCT_RETURN 1
1183 #endif
1184
1185 #ifndef PCC_BITFIELD_TYPE_MATTERS
1186 #define PCC_BITFIELD_TYPE_MATTERS false
1187 #endif
1188
1189 #ifndef INSN_SETS_ARE_DELAYED
1190 #define INSN_SETS_ARE_DELAYED(INSN) false
1191 #endif
1192
1193 #ifndef INSN_REFERENCES_ARE_DELAYED
1194 #define INSN_REFERENCES_ARE_DELAYED(INSN) false
1195 #endif
1196
1197 #ifndef NO_FUNCTION_CSE
1198 #define NO_FUNCTION_CSE false
1199 #endif
1200
1201 #ifndef HARD_REGNO_RENAME_OK
1202 #define HARD_REGNO_RENAME_OK(FROM, TO) true
1203 #endif
1204
1205 #ifndef EPILOGUE_USES
1206 #define EPILOGUE_USES(REG) false
1207 #endif
1208
1209 #ifndef ARGS_GROW_DOWNWARD
1210 #define ARGS_GROW_DOWNWARD 0
1211 #endif
1212
1213 #ifndef STACK_GROWS_DOWNWARD
1214 #define STACK_GROWS_DOWNWARD 0
1215 #endif
1216
1217 #ifndef STACK_PUSH_CODE
1218 #if STACK_GROWS_DOWNWARD
1219 #define STACK_PUSH_CODE PRE_DEC
1220 #else
1221 #define STACK_PUSH_CODE PRE_INC
1222 #endif
1223 #endif
1224
1225 /* Default value for flag_pie when flag_pie is initialized to -1:
1226    --enable-default-pie: Default flag_pie to -fPIE.
1227    --disable-default-pie: Default flag_pie to 0.
1228  */
1229 #ifdef ENABLE_DEFAULT_PIE
1230 # ifndef DEFAULT_FLAG_PIE
1231 #  define DEFAULT_FLAG_PIE 2
1232 # endif
1233 #else
1234 # define DEFAULT_FLAG_PIE 0
1235 #endif
1236
1237 #ifndef SWITCHABLE_TARGET
1238 #define SWITCHABLE_TARGET 0
1239 #endif
1240
1241 /* If the target supports integers that are wider than two
1242    HOST_WIDE_INTs on the host compiler, then the target should define
1243    TARGET_SUPPORTS_WIDE_INT and make the appropriate fixups.
1244    Otherwise the compiler really is not robust.  */
1245 #ifndef TARGET_SUPPORTS_WIDE_INT
1246 #define TARGET_SUPPORTS_WIDE_INT 0
1247 #endif
1248
1249 #ifndef SHORT_IMMEDIATES_SIGN_EXTEND
1250 #define SHORT_IMMEDIATES_SIGN_EXTEND 0
1251 #endif
1252
1253 #ifndef WORD_REGISTER_OPERATIONS
1254 #define WORD_REGISTER_OPERATIONS 0
1255 #endif
1256
1257 #ifndef LOAD_EXTEND_OP
1258 #define LOAD_EXTEND_OP(M) UNKNOWN
1259 #endif
1260
1261 #ifndef INITIAL_FRAME_ADDRESS_RTX
1262 #define INITIAL_FRAME_ADDRESS_RTX NULL
1263 #endif
1264
1265 #ifndef SETUP_FRAME_ADDRESSES
1266 #define SETUP_FRAME_ADDRESSES() do { } while (0)
1267 #endif
1268
1269 #ifndef DYNAMIC_CHAIN_ADDRESS
1270 #define DYNAMIC_CHAIN_ADDRESS(x) (x)
1271 #endif
1272
1273 #ifndef FRAME_ADDR_RTX
1274 #define FRAME_ADDR_RTX(x) (x)
1275 #endif
1276
1277 #ifndef REVERSE_CONDITION
1278 #define REVERSE_CONDITION(code, mode) reverse_condition (code)
1279 #endif
1280
1281 #ifndef TARGET_PECOFF
1282 #define TARGET_PECOFF 0
1283 #endif
1284
1285 #ifndef TARGET_COFF
1286 #define TARGET_COFF 0
1287 #endif
1288
1289 #ifndef EH_RETURN_HANDLER_RTX
1290 #define EH_RETURN_HANDLER_RTX NULL
1291 #endif
1292
1293 #ifdef GCC_INSN_FLAGS_H
1294 /* Dependent default target macro definitions
1295
1296    This section of defaults.h defines target macros that depend on generated
1297    headers.  This is a bit awkward:  We want to put all default definitions
1298    for target macros in defaults.h, but some of the defaults depend on the
1299    HAVE_* flags defines of insn-flags.h.  But insn-flags.h is not always
1300    included by files that do include defaults.h.
1301
1302    Fortunately, the default macro definitions that depend on the HAVE_*
1303    macros are also the ones that will only be used inside GCC itself, i.e.
1304    not in the gen* programs or in target objects like libgcc.
1305
1306    Obviously, it would be best to keep this section of defaults.h as small
1307    as possible, by converting the macros defined below to target hooks or
1308    functions.
1309 */
1310
1311 /* The default branch cost is 1.  */
1312 #ifndef BRANCH_COST
1313 #define BRANCH_COST(speed_p, predictable_p) 1
1314 #endif
1315
1316 /* If a memory-to-memory move would take MOVE_RATIO or more simple
1317    move-instruction sequences, we will do a movmem or libcall instead.  */
1318
1319 #ifndef MOVE_RATIO
1320 #if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti)
1321 #define MOVE_RATIO(speed) 2
1322 #else
1323 /* If we are optimizing for space (-Os), cut down the default move ratio.  */
1324 #define MOVE_RATIO(speed) ((speed) ? 15 : 3)
1325 #endif
1326 #endif
1327
1328 /* If a clear memory operation would take CLEAR_RATIO or more simple
1329    move-instruction sequences, we will do a setmem or libcall instead.  */
1330
1331 #ifndef CLEAR_RATIO
1332 #if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
1333 #define CLEAR_RATIO(speed) 2
1334 #else
1335 /* If we are optimizing for space, cut down the default clear ratio.  */
1336 #define CLEAR_RATIO(speed) ((speed) ? 15 :3)
1337 #endif
1338 #endif
1339
1340 /* If a memory set (to value other than zero) operation would take
1341    SET_RATIO or more simple move-instruction sequences, we will do a movmem
1342    or libcall instead.  */
1343 #ifndef SET_RATIO
1344 #define SET_RATIO(speed) MOVE_RATIO (speed)
1345 #endif
1346
1347 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
1348    Normally move_insn, so Pmode stack pointer.  */
1349
1350 #ifndef STACK_SAVEAREA_MODE
1351 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
1352 #endif
1353
1354 /* Supply a default definition of STACK_SIZE_MODE for
1355    allocate_dynamic_stack_space.  Normally PLUS/MINUS, so word_mode.  */
1356
1357 #ifndef STACK_SIZE_MODE
1358 #define STACK_SIZE_MODE word_mode
1359 #endif
1360
1361 /* Default value for flag_stack_protect when flag_stack_protect is initialized to -1:
1362    --enable-default-ssp: Default flag_stack_protect to -fstack-protector-strong.
1363    --disable-default-ssp: Default flag_stack_protect to 0.
1364  */
1365 #ifdef ENABLE_DEFAULT_SSP
1366 # ifndef DEFAULT_FLAG_SSP
1367 #  define DEFAULT_FLAG_SSP 3
1368 # endif
1369 #else
1370 # define DEFAULT_FLAG_SSP 0
1371 #endif
1372
1373 /* Provide default values for the macros controlling stack checking.  */
1374
1375 /* The default is neither full builtin stack checking...  */
1376 #ifndef STACK_CHECK_BUILTIN
1377 #define STACK_CHECK_BUILTIN 0
1378 #endif
1379
1380 /* ...nor static builtin stack checking.  */
1381 #ifndef STACK_CHECK_STATIC_BUILTIN
1382 #define STACK_CHECK_STATIC_BUILTIN 0
1383 #endif
1384
1385 /* The default interval is one page (4096 bytes).  */
1386 #ifndef STACK_CHECK_PROBE_INTERVAL_EXP
1387 #define STACK_CHECK_PROBE_INTERVAL_EXP 12
1388 #endif
1389
1390 /* The default is not to move the stack pointer.  */
1391 #ifndef STACK_CHECK_MOVING_SP
1392 #define STACK_CHECK_MOVING_SP 0
1393 #endif
1394
1395 /* This is a kludge to try to capture the discrepancy between the old
1396    mechanism (generic stack checking) and the new mechanism (static
1397    builtin stack checking).  STACK_CHECK_PROTECT needs to be bumped
1398    for the latter because part of the protection area is effectively
1399    included in STACK_CHECK_MAX_FRAME_SIZE for the former.  */
1400 #ifdef STACK_CHECK_PROTECT
1401 #define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
1402 #else
1403 #define STACK_OLD_CHECK_PROTECT                                         \
1404  (!global_options.x_flag_exceptions                                     \
1405   ? 75 * UNITS_PER_WORD                                                 \
1406   : targetm_common.except_unwind_info (&global_options) == UI_SJLJ      \
1407     ? 4 * 1024                                                          \
1408     : 8 * 1024)
1409 #endif
1410
1411 /* Minimum amount of stack required to recover from an anticipated stack
1412    overflow detection.  The default value conveys an estimate of the amount
1413    of stack required to propagate an exception.  */
1414 #ifndef STACK_CHECK_PROTECT
1415 #define STACK_CHECK_PROTECT                                             \
1416  (!global_options.x_flag_exceptions                                     \
1417   ? 4 * 1024                                                            \
1418   : targetm_common.except_unwind_info (&global_options) == UI_SJLJ      \
1419     ? 8 * 1024                                                          \
1420     : 12 * 1024)
1421 #endif
1422
1423 /* Make the maximum frame size be the largest we can and still only need
1424    one probe per function.  */
1425 #ifndef STACK_CHECK_MAX_FRAME_SIZE
1426 #define STACK_CHECK_MAX_FRAME_SIZE \
1427   ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD)
1428 #endif
1429
1430 /* This is arbitrary, but should be large enough everywhere.  */
1431 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
1432 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
1433 #endif
1434
1435 /* Provide a reasonable default for the maximum size of an object to
1436    allocate in the fixed frame.  We may need to be able to make this
1437    controllable by the user at some point.  */
1438 #ifndef STACK_CHECK_MAX_VAR_SIZE
1439 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
1440 #endif
1441
1442 /* By default, the C++ compiler will use function addresses in the
1443    vtable entries.  Setting this nonzero tells the compiler to use
1444    function descriptors instead.  The value of this macro says how
1445    many words wide the descriptor is (normally 2).  It is assumed
1446    that the address of a function descriptor may be treated as a
1447    pointer to a function.  */
1448 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
1449 #define TARGET_VTABLE_USES_DESCRIPTORS 0
1450 #endif
1451
1452 #endif /* GCC_INSN_FLAGS_H  */
1453
1454 #ifndef DWARF_GNAT_ENCODINGS_DEFAULT
1455 #define DWARF_GNAT_ENCODINGS_DEFAULT DWARF_GNAT_ENCODINGS_GDB
1456 #endif
1457
1458 #endif  /* ! GCC_DEFAULTS_H */