gcc/defaults.h

   1 /* Definitions of various defaults for tm.h macros.
   2    Copyright (C) 1992-2024 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 *_my_file = (MYFILE);                                \
  65     const unsigned char *_hide_p = (const unsigned char *) (MYSTRING);        \
  66     int _hide_thissize = (MYLENGTH);                                          \
  67     {                                                                         \
  68       const unsigned char *p = _hide_p;                                       \
  69       int thissize = _hide_thissize;                                          \
  70       int i;                                                                  \
  71       fprintf (_my_file, "\t.ascii \"");                                      \
  72                                                                               \
  73       for (i = 0; i < thissize; i++)                                          \
  74         {                                                                     \
  75           int c = p[i];                                                       \
  76           if (c == '\"' || c == '\\')                                         \
  77             putc ('\\', _my_file);                                            \
  78           if (ISPRINT (c))                                                    \
  79             putc (c, _my_file);                                               \
  80           else                                                                \
  81             {                                                                 \
  82               fprintf (_my_file, "\\%o", c);                                  \
  83               /* After an octal-escape, if a digit follows,                   \
  84                  terminate one string constant and start another.             \
  85                  The VAX assembler fails to stop reading the escape           \
  86                  after three digits, so this is the only way we               \
  87                  can get it to parse the data properly.  */                   \
  88               if (i < thissize - 1 && ISDIGIT (p[i + 1]))                     \
  89                 fprintf (_my_file, "\"\n\t.ascii \"");                        \
  90           }                                                                   \
  91         }                                                                     \
  92       fprintf (_my_file, "\"\n");                                             \
  93     }                                                                         \
  94   }                                                                           \
  95   while (0)
  96 #endif
  97
  98 /* This is how we tell the assembler to equate two values.  */
  99 #ifdef SET_ASM_OP
 100 #ifndef ASM_OUTPUT_DEF
 101 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
 102  do {   fprintf ((FILE), "%s", SET_ASM_OP);                             \
 103         assemble_name (FILE, LABEL1);                                   \
 104         fprintf (FILE, ",");                                            \
 105         assemble_name (FILE, LABEL2);                                   \
 106         fprintf (FILE, "\n");                                           \
 107   } while (0)
 108 #endif
 109 #endif
 110
 111 #ifndef IFUNC_ASM_TYPE
 112 #define IFUNC_ASM_TYPE "gnu_indirect_function"
 113 #endif
 114
 115 #ifndef TLS_COMMON_ASM_OP
 116 #define TLS_COMMON_ASM_OP ".tls_common"
 117 #endif
 118
 119 #if defined (HAVE_AS_TLS) && !defined (ASM_OUTPUT_TLS_COMMON)
 120 #define ASM_OUTPUT_TLS_COMMON(FILE, DECL, NAME, SIZE)                   \
 121   do                                                                    \
 122     {                                                                   \
 123       fprintf ((FILE), "\t%s\t", TLS_COMMON_ASM_OP);                    \
 124       assemble_name ((FILE), (NAME));                                   \
 125       fprintf ((FILE), "," HOST_WIDE_INT_PRINT_UNSIGNED",%u\n",         \
 126                (SIZE), DECL_ALIGN (DECL) / BITS_PER_UNIT);              \
 127     }                                                                   \
 128   while (0)
 129 #endif
 130
 131 /* Decide whether to defer emitting the assembler output for an equate
 132    of two values.  The default is to not defer output.  */
 133 #ifndef TARGET_DEFERRED_OUTPUT_DEFS
 134 #define TARGET_DEFERRED_OUTPUT_DEFS(DECL,TARGET) false
 135 #endif
 136
 137 /* This is how to output the definition of a user-level label named
 138    NAME, such as the label on variable NAME.  */
 139
 140 #ifndef ASM_OUTPUT_LABEL
 141 #define ASM_OUTPUT_LABEL(FILE,NAME) \
 142   do {                                          \
 143     assemble_name ((FILE), (NAME));             \
 144     fputs (":\n", (FILE));                      \
 145   } while (0)
 146 #endif
 147
 148 /* This is how to output the definition of a user-level label named
 149    NAME, such as the label on a function.  */
 150
 151 #ifndef ASM_OUTPUT_FUNCTION_LABEL
 152 #define ASM_OUTPUT_FUNCTION_LABEL(FILE, NAME, DECL) \
 153   assemble_function_label_raw ((FILE), (NAME))
 154 #endif
 155
 156 /* Output the definition of a compiler-generated label named NAME.  */
 157 #ifndef ASM_OUTPUT_INTERNAL_LABEL
 158 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,NAME)    \
 159   do {                                          \
 160     assemble_name_raw ((FILE), (NAME));         \
 161     fputs (":\n", (FILE));                      \
 162   } while (0)
 163 #endif
 164
 165 /* This is how to output a reference to a user-level label named NAME.  */
 166
 167 #ifndef ASM_OUTPUT_LABELREF
 168 #define ASM_OUTPUT_LABELREF(FILE,NAME)  \
 169   do {                                                  \
 170     fputs (user_label_prefix, (FILE));                  \
 171     fputs ((NAME), (FILE));                             \
 172   } while (0)
 173 #endif
 174
 175 /* Allow target to print debug info labels specially.  This is useful for
 176    VLIW targets, since debug info labels should go into the middle of
 177    instruction bundles instead of breaking them.  */
 178
 179 #ifndef ASM_OUTPUT_DEBUG_LABEL
 180 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
 181   (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM)
 182 #endif
 183
 184 /* This is how we tell the assembler that a symbol is weak.  */
 185 #ifndef ASM_OUTPUT_WEAK_ALIAS
 186 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
 187 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE)      \
 188   do                                                    \
 189     {                                                   \
 190       ASM_WEAKEN_LABEL (STREAM, NAME);                  \
 191       if (VALUE)                                        \
 192         ASM_OUTPUT_DEF (STREAM, NAME, VALUE);           \
 193     }                                                   \
 194   while (0)
 195 #endif
 196 #endif
 197
 198 /* This is how we tell the assembler that a symbol is a weak alias to
 199    another symbol that doesn't require the other symbol to be defined.
 200    Uses of the former will turn into weak uses of the latter, i.e.,
 201    uses that, in case the latter is undefined, will not cause errors,
 202    and will add it to the symbol table as weak undefined.  However, if
 203    the latter is referenced directly, a strong reference prevails.  */
 204 #ifndef ASM_OUTPUT_WEAKREF
 205 #if defined HAVE_GAS_WEAKREF
 206 #define ASM_OUTPUT_WEAKREF(FILE, DECL, NAME, VALUE)                     \
 207   do                                                                    \
 208     {                                                                   \
 209       fprintf ((FILE), "\t.weakref\t");                                 \
 210       assemble_name ((FILE), (NAME));                                   \
 211       fprintf ((FILE), ",");                                            \
 212       assemble_name ((FILE), (VALUE));                                  \
 213       fprintf ((FILE), "\n");                                           \
 214     }                                                                   \
 215   while (0)
 216 #endif
 217 #endif
 218
 219 /* How to emit a .type directive.  */
 220 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE
 221 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT
 222 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE)   \
 223   do                                                    \
 224     {                                                   \
 225       fputs (TYPE_ASM_OP, STREAM);                      \
 226       assemble_name (STREAM, NAME);                     \
 227       fputs (", ", STREAM);                             \
 228       fprintf (STREAM, TYPE_OPERAND_FMT, TYPE);         \
 229       putc ('\n', STREAM);                              \
 230     }                                                   \
 231   while (0)
 232 #endif
 233 #endif
 234
 235 /* How to emit a .size directive.  */
 236 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE
 237 #ifdef SIZE_ASM_OP
 238 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE)   \
 239   do                                                    \
 240     {                                                   \
 241       HOST_WIDE_INT size_ = (SIZE);                     \
 242       fputs (SIZE_ASM_OP, STREAM);                      \
 243       assemble_name (STREAM, NAME);                     \
 244       fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \
 245     }                                                   \
 246   while (0)
 247
 248 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME)          \
 249   do                                                    \
 250     {                                                   \
 251       fputs (SIZE_ASM_OP, STREAM);                      \
 252       assemble_name (STREAM, NAME);                     \
 253       fputs (", .-", STREAM);                           \
 254       assemble_name (STREAM, NAME);                     \
 255       putc ('\n', STREAM);                              \
 256     }                                                   \
 257   while (0)
 258
 259 #endif
 260 #endif
 261
 262 /* This determines whether or not we support weak symbols.  SUPPORTS_WEAK
 263    must be a preprocessor constant.  */
 264 #ifndef SUPPORTS_WEAK
 265 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
 266 #define SUPPORTS_WEAK 1
 267 #else
 268 #define SUPPORTS_WEAK 0
 269 #endif
 270 #endif
 271
 272 /* This determines whether or not we support weak symbols during target
 273    code generation.  TARGET_SUPPORTS_WEAK can be any valid C expression.  */
 274 #ifndef TARGET_SUPPORTS_WEAK
 275 #define TARGET_SUPPORTS_WEAK (SUPPORTS_WEAK)
 276 #endif
 277
 278 /* This determines whether or not we support the discriminator
 279    attribute in the .loc directive.  */
 280 #ifndef SUPPORTS_DISCRIMINATOR
 281 #ifdef HAVE_GAS_DISCRIMINATOR
 282 #define SUPPORTS_DISCRIMINATOR 1
 283 #else
 284 #define SUPPORTS_DISCRIMINATOR 0
 285 #endif
 286 #endif
 287
 288 /* This determines whether or not we support marking sections with
 289    SHF_GNU_RETAIN flag.  Also require .init_array/.fini_array section
 290    for constructors and destructors.  */
 291 #ifndef SUPPORTS_SHF_GNU_RETAIN
 292 #if HAVE_GAS_SHF_GNU_RETAIN && HAVE_INITFINI_ARRAY_SUPPORT
 293 #define SUPPORTS_SHF_GNU_RETAIN 1
 294 #else
 295 #define SUPPORTS_SHF_GNU_RETAIN 0
 296 #endif
 297 #endif
 298
 299 /* This determines whether or not we support link-once semantics.  */
 300 #ifndef SUPPORTS_ONE_ONLY
 301 #ifdef MAKE_DECL_ONE_ONLY
 302 #define SUPPORTS_ONE_ONLY 1
 303 #else
 304 #define SUPPORTS_ONE_ONLY 0
 305 #endif
 306 #endif
 307
 308 /* This determines whether weak symbols must be left out of a static
 309    archive's table of contents.  Defining this macro to be nonzero has
 310    the consequence that certain symbols will not be made weak that
 311    otherwise would be.  The C++ ABI requires this macro to be zero;
 312    see the documentation.  */
 313 #ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 314 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
 315 #endif
 316
 317 /* This determines whether or not we need linkonce unwind information.  */
 318 #ifndef TARGET_USES_WEAK_UNWIND_INFO
 319 #define TARGET_USES_WEAK_UNWIND_INFO 0
 320 #endif
 321
 322 /* By default, there is no prefix on user-defined symbols.  */
 323 #ifndef USER_LABEL_PREFIX
 324 #define USER_LABEL_PREFIX ""
 325 #endif
 326
 327 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
 328    provide a weak attribute.  Else define it to nothing.
 329
 330    This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
 331    not available at that time.
 332
 333    Note, this is only for use by target files which we know are to be
 334    compiled by GCC.  */
 335 #ifndef TARGET_ATTRIBUTE_WEAK
 336 # if SUPPORTS_WEAK
 337 #  define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
 338 # else
 339 #  define TARGET_ATTRIBUTE_WEAK
 340 # endif
 341 #endif
 342
 343 /* By default we can assume that all global symbols are in one namespace,
 344    across all shared libraries.  */
 345 #ifndef MULTIPLE_SYMBOL_SPACES
 346 # define MULTIPLE_SYMBOL_SPACES 0
 347 #endif
 348
 349 /* If the target supports init_priority C++ attribute, give
 350    SUPPORTS_INIT_PRIORITY a nonzero value.  */
 351 #ifndef SUPPORTS_INIT_PRIORITY
 352 #define SUPPORTS_INIT_PRIORITY 1
 353 #endif /* SUPPORTS_INIT_PRIORITY */
 354
 355 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
 356    the rest of the DWARF 2 frame unwind support is also provided.  */
 357 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
 358 #define DWARF2_UNWIND_INFO 1
 359 #endif
 360
 361 /* If we have named sections, and we're using crtstuff to run ctors,
 362    use them for registering eh frame information.  */
 363 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
 364     && !defined (EH_FRAME_THROUGH_COLLECT2)
 365 #ifndef EH_FRAME_SECTION_NAME
 366 #define EH_FRAME_SECTION_NAME ".eh_frame"
 367 #endif
 368 #endif
 369
 370 /* On many systems, different EH table encodings are used under
 371    difference circumstances.  Some will require runtime relocations;
 372    some will not.  For those that do not require runtime relocations,
 373    we would like to make the table read-only.  However, since the
 374    read-only tables may need to be combined with read-write tables
 375    that do require runtime relocation, it is not safe to make the
 376    tables read-only unless the linker will merge read-only and
 377    read-write sections into a single read-write section.  If your
 378    linker does not have this ability, but your system is such that no
 379    encoding used with non-PIC code will ever require a runtime
 380    relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in
 381    your target configuration file.  */
 382 #ifndef EH_TABLES_CAN_BE_READ_ONLY
 383 #ifdef HAVE_LD_RO_RW_SECTION_MIXING
 384 #define EH_TABLES_CAN_BE_READ_ONLY 1
 385 #else
 386 #define EH_TABLES_CAN_BE_READ_ONLY 0
 387 #endif
 388 #endif
 389
 390 /* Provide defaults for stuff that may not be defined when using
 391    sjlj exceptions.  */
 392 #ifndef EH_RETURN_DATA_REGNO
 393 #define EH_RETURN_DATA_REGNO(N) INVALID_REGNUM
 394 #endif
 395
 396 /* Offset between the eh handler address and entry in eh tables.  */
 397 #ifndef RETURN_ADDR_OFFSET
 398 #define RETURN_ADDR_OFFSET 0
 399 #endif
 400
 401 #ifndef MASK_RETURN_ADDR
 402 #define MASK_RETURN_ADDR NULL_RTX
 403 #endif
 404
 405 /* Number of hardware registers that go into the DWARF-2 unwind info.
 406    If not defined, equals FIRST_PSEUDO_REGISTER  */
 407
 408 #ifndef DWARF_FRAME_REGISTERS
 409 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
 410 #endif
 411
 412 /* Offsets recorded in opcodes are a multiple of this alignment factor.  */
 413 #ifndef DWARF_CIE_DATA_ALIGNMENT
 414 #ifdef STACK_GROWS_DOWNWARD
 415 #define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD))
 416 #else
 417 #define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD)
 418 #endif
 419 #endif
 420
 421 /* The DWARF 2 CFA column which tracks the return address.  Normally this
 422    is the column for PC, or the first column after all of the hard
 423    registers.  */
 424 #ifndef DWARF_FRAME_RETURN_COLUMN
 425 #ifdef PC_REGNUM
 426 #define DWARF_FRAME_RETURN_COLUMN       DWARF_FRAME_REGNUM (PC_REGNUM)
 427 #else
 428 #define DWARF_FRAME_RETURN_COLUMN       DWARF_FRAME_REGISTERS
 429 #endif
 430 #endif
 431
 432 /* How to renumber registers for gdb.  If not defined, assume
 433    no renumbering is necessary.  */
 434
 435 #ifndef DEBUGGER_REGNO
 436 #define DEBUGGER_REGNO(REGNO) (REGNO)
 437 #endif
 438
 439 /* The mapping from gcc register number to DWARF 2 CFA column number.
 440    By default, we just provide columns for all registers.  */
 441 #ifndef DWARF_FRAME_REGNUM
 442 #define DWARF_FRAME_REGNUM(REG) DEBUGGER_REGNO (REG)
 443 #endif
 444
 445 /* The mapping from dwarf CFA reg number to internal dwarf reg numbers.  */
 446 #ifndef DWARF_REG_TO_UNWIND_COLUMN
 447 #define DWARF_REG_TO_UNWIND_COLUMN(REGNO) (REGNO)
 448 #endif
 449
 450 /* Map register numbers held in the call frame info that gcc has
 451    collected using DWARF_FRAME_REGNUM to those that should be output in
 452    .debug_frame and .eh_frame.  */
 453 #ifndef DWARF2_FRAME_REG_OUT
 454 #define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) (REGNO)
 455 #endif
 456
 457 /* The size of addresses as they appear in the Dwarf 2 data.
 458    Some architectures use word addresses to refer to code locations,
 459    but Dwarf 2 info always uses byte addresses.  On such machines,
 460    Dwarf 2 addresses need to be larger than the architecture's
 461    pointers.  */
 462 #ifndef DWARF2_ADDR_SIZE
 463 #define DWARF2_ADDR_SIZE ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)
 464 #endif
 465
 466 /* The size in bytes of a DWARF field indicating an offset or length
 467    relative to a debug info section, specified to be 4 bytes in the
 468    DWARF-2 specification.  The SGI/MIPS ABI defines it to be the same
 469    as PTR_SIZE.  */
 470 #ifndef DWARF_OFFSET_SIZE
 471 #define DWARF_OFFSET_SIZE 4
 472 #endif
 473
 474 /* The size in bytes of a DWARF 4 type signature.  */
 475 #ifndef DWARF_TYPE_SIGNATURE_SIZE
 476 #define DWARF_TYPE_SIGNATURE_SIZE 8
 477 #endif
 478
 479 /* Default sizes for base C types.  If the sizes are different for
 480    your target, you should override these values by defining the
 481    appropriate symbols in your tm.h file.  */
 482
 483 #ifndef BITS_PER_WORD
 484 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
 485 #endif
 486
 487 #ifndef CHAR_TYPE_SIZE
 488 #define CHAR_TYPE_SIZE BITS_PER_UNIT
 489 #endif
 490
 491 #ifndef BOOL_TYPE_SIZE
 492 /* `bool' has size and alignment `1', on almost all platforms.  */
 493 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
 494 #endif
 495
 496 #ifndef SHORT_TYPE_SIZE
 497 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
 498 #endif
 499
 500 #ifndef INT_TYPE_SIZE
 501 #define INT_TYPE_SIZE BITS_PER_WORD
 502 #endif
 503
 504 #ifndef LONG_TYPE_SIZE
 505 #define LONG_TYPE_SIZE BITS_PER_WORD
 506 #endif
 507
 508 #ifndef LONG_LONG_TYPE_SIZE
 509 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
 510 #endif
 511
 512 #ifndef WCHAR_TYPE_SIZE
 513 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
 514 #endif
 515
 516 #ifndef FLOAT_TYPE_SIZE
 517 #define FLOAT_TYPE_SIZE BITS_PER_WORD
 518 #endif
 519
 520 #ifndef DOUBLE_TYPE_SIZE
 521 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 522 #endif
 523
 524 #ifndef LONG_DOUBLE_TYPE_SIZE
 525 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 526 #endif
 527
 528 #ifndef DECIMAL32_TYPE_SIZE
 529 #define DECIMAL32_TYPE_SIZE 32
 530 #endif
 531
 532 #ifndef DECIMAL64_TYPE_SIZE
 533 #define DECIMAL64_TYPE_SIZE 64
 534 #endif
 535
 536 #ifndef DECIMAL128_TYPE_SIZE
 537 #define DECIMAL128_TYPE_SIZE 128
 538 #endif
 539
 540 #ifndef SHORT_FRACT_TYPE_SIZE
 541 #define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT
 542 #endif
 543
 544 #ifndef FRACT_TYPE_SIZE
 545 #define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2)
 546 #endif
 547
 548 #ifndef LONG_FRACT_TYPE_SIZE
 549 #define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4)
 550 #endif
 551
 552 #ifndef LONG_LONG_FRACT_TYPE_SIZE
 553 #define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8)
 554 #endif
 555
 556 #ifndef SHORT_ACCUM_TYPE_SIZE
 557 #define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2)
 558 #endif
 559
 560 #ifndef ACCUM_TYPE_SIZE
 561 #define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2)
 562 #endif
 563
 564 #ifndef LONG_ACCUM_TYPE_SIZE
 565 #define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2)
 566 #endif
 567
 568 #ifndef LONG_LONG_ACCUM_TYPE_SIZE
 569 #define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2)
 570 #endif
 571
 572 /* We let tm.h override the types used here, to handle trivial differences
 573    such as the choice of unsigned int or long unsigned int for size_t.
 574    When machines start needing nontrivial differences in the size type,
 575    it would be best to do something here to figure out automatically
 576    from other information what type to use.  */
 577
 578 #ifndef SIZE_TYPE
 579 #define SIZE_TYPE "long unsigned int"
 580 #endif
 581
 582 #ifndef SIZETYPE
 583 #define SIZETYPE SIZE_TYPE
 584 #endif
 585
 586 #ifndef PID_TYPE
 587 #define PID_TYPE "int"
 588 #endif
 589
 590 /* If GCC knows the exact uint_least16_t and uint_least32_t types from
 591    <stdint.h>, use them for char16_t and char32_t.  Otherwise, use
 592    these guesses; getting the wrong type of a given width will not
 593    affect C++ name mangling because in C++ these are distinct types
 594    not typedefs.  */
 595
 596 #ifndef CHAR8_TYPE
 597 #define CHAR8_TYPE "unsigned char"
 598 #endif
 599
 600 #ifdef UINT_LEAST16_TYPE
 601 #define CHAR16_TYPE UINT_LEAST16_TYPE
 602 #else
 603 #define CHAR16_TYPE "short unsigned int"
 604 #endif
 605
 606 #ifdef UINT_LEAST32_TYPE
 607 #define CHAR32_TYPE UINT_LEAST32_TYPE
 608 #else
 609 #define CHAR32_TYPE "unsigned int"
 610 #endif
 611
 612 #ifndef WCHAR_TYPE
 613 #define WCHAR_TYPE "int"
 614 #endif
 615
 616 /* WCHAR_TYPE gets overridden by -fshort-wchar.  */
 617 #define MODIFIED_WCHAR_TYPE \
 618         (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE)
 619
 620 #ifndef PTRDIFF_TYPE
 621 #define PTRDIFF_TYPE "long int"
 622 #endif
 623
 624 #ifndef WINT_TYPE
 625 #define WINT_TYPE "unsigned int"
 626 #endif
 627
 628 #ifndef INTMAX_TYPE
 629 #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)     \
 630                      ? "int"                                    \
 631                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 632                         ? "long int"                            \
 633                         : "long long int"))
 634 #endif
 635
 636 #ifndef UINTMAX_TYPE
 637 #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)    \
 638                      ? "unsigned int"                           \
 639                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 640                         ? "long unsigned int"                   \
 641                         : "long long unsigned int"))
 642 #endif
 643
 644
 645 /* There are no default definitions of these <stdint.h> types.  */
 646
 647 #ifndef SIG_ATOMIC_TYPE
 648 #define SIG_ATOMIC_TYPE ((const char *) NULL)
 649 #endif
 650
 651 #ifndef INT8_TYPE
 652 #define INT8_TYPE ((const char *) NULL)
 653 #endif
 654
 655 #ifndef INT16_TYPE
 656 #define INT16_TYPE ((const char *) NULL)
 657 #endif
 658
 659 #ifndef INT32_TYPE
 660 #define INT32_TYPE ((const char *) NULL)
 661 #endif
 662
 663 #ifndef INT64_TYPE
 664 #define INT64_TYPE ((const char *) NULL)
 665 #endif
 666
 667 #ifndef UINT8_TYPE
 668 #define UINT8_TYPE ((const char *) NULL)
 669 #endif
 670
 671 #ifndef UINT16_TYPE
 672 #define UINT16_TYPE ((const char *) NULL)
 673 #endif
 674
 675 #ifndef UINT32_TYPE
 676 #define UINT32_TYPE ((const char *) NULL)
 677 #endif
 678
 679 #ifndef UINT64_TYPE
 680 #define UINT64_TYPE ((const char *) NULL)
 681 #endif
 682
 683 #ifndef INT_LEAST8_TYPE
 684 #define INT_LEAST8_TYPE ((const char *) NULL)
 685 #endif
 686
 687 #ifndef INT_LEAST16_TYPE
 688 #define INT_LEAST16_TYPE ((const char *) NULL)
 689 #endif
 690
 691 #ifndef INT_LEAST32_TYPE
 692 #define INT_LEAST32_TYPE ((const char *) NULL)
 693 #endif
 694
 695 #ifndef INT_LEAST64_TYPE
 696 #define INT_LEAST64_TYPE ((const char *) NULL)
 697 #endif
 698
 699 #ifndef UINT_LEAST8_TYPE
 700 #define UINT_LEAST8_TYPE ((const char *) NULL)
 701 #endif
 702
 703 #ifndef UINT_LEAST16_TYPE
 704 #define UINT_LEAST16_TYPE ((const char *) NULL)
 705 #endif
 706
 707 #ifndef UINT_LEAST32_TYPE
 708 #define UINT_LEAST32_TYPE ((const char *) NULL)
 709 #endif
 710
 711 #ifndef UINT_LEAST64_TYPE
 712 #define UINT_LEAST64_TYPE ((const char *) NULL)
 713 #endif
 714
 715 #ifndef INT_FAST8_TYPE
 716 #define INT_FAST8_TYPE ((const char *) NULL)
 717 #endif
 718
 719 #ifndef INT_FAST16_TYPE
 720 #define INT_FAST16_TYPE ((const char *) NULL)
 721 #endif
 722
 723 #ifndef INT_FAST32_TYPE
 724 #define INT_FAST32_TYPE ((const char *) NULL)
 725 #endif
 726
 727 #ifndef INT_FAST64_TYPE
 728 #define INT_FAST64_TYPE ((const char *) NULL)
 729 #endif
 730
 731 #ifndef UINT_FAST8_TYPE
 732 #define UINT_FAST8_TYPE ((const char *) NULL)
 733 #endif
 734
 735 #ifndef UINT_FAST16_TYPE
 736 #define UINT_FAST16_TYPE ((const char *) NULL)
 737 #endif
 738
 739 #ifndef UINT_FAST32_TYPE
 740 #define UINT_FAST32_TYPE ((const char *) NULL)
 741 #endif
 742
 743 #ifndef UINT_FAST64_TYPE
 744 #define UINT_FAST64_TYPE ((const char *) NULL)
 745 #endif
 746
 747 #ifndef INTPTR_TYPE
 748 #define INTPTR_TYPE ((const char *) NULL)
 749 #endif
 750
 751 #ifndef UINTPTR_TYPE
 752 #define UINTPTR_TYPE ((const char *) NULL)
 753 #endif
 754
 755 /* Width in bits of a pointer.  Mind the value of the macro `Pmode'.  */
 756 #ifndef POINTER_SIZE
 757 #define POINTER_SIZE BITS_PER_WORD
 758 #endif
 759 #ifndef POINTER_SIZE_UNITS
 760 #define POINTER_SIZE_UNITS ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)
 761 #endif
 762
 763
 764 #ifndef PIC_OFFSET_TABLE_REGNUM
 765 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
 766 #endif
 767
 768 #ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
 769 #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 0
 770 #endif
 771
 772 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
 773 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
 774 #endif
 775
 776 #ifndef TARGET_DECLSPEC
 777 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
 778 /* If the target supports the "dllimport" attribute, users are
 779    probably used to the "__declspec" syntax.  */
 780 #define TARGET_DECLSPEC 1
 781 #else
 782 #define TARGET_DECLSPEC 0
 783 #endif
 784 #endif
 785
 786 /* By default, the preprocessor should be invoked the same way in C++
 787    as in C.  */
 788 #ifndef CPLUSPLUS_CPP_SPEC
 789 #ifdef CPP_SPEC
 790 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
 791 #endif
 792 #endif
 793
 794 #ifndef ACCUMULATE_OUTGOING_ARGS
 795 #define ACCUMULATE_OUTGOING_ARGS 0
 796 #endif
 797
 798 /* By default, use the GNU runtime for Objective C.  */
 799 #ifndef NEXT_OBJC_RUNTIME
 800 #define NEXT_OBJC_RUNTIME 0
 801 #endif
 802
 803 /* Decide whether a function's arguments should be processed
 804    from first to last or from last to first.
 805
 806    They should if the stack and args grow in opposite directions, but
 807    only if we have push insns.  */
 808
 809 #ifdef PUSH_ROUNDING
 810
 811 #ifndef PUSH_ARGS_REVERSED
 812 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
 813 #define PUSH_ARGS_REVERSED targetm.calls.push_argument (0)
 814 #endif
 815 #endif
 816
 817 #endif
 818
 819 #ifndef PUSH_ARGS_REVERSED
 820 #define PUSH_ARGS_REVERSED 0
 821 #endif
 822
 823 /* Default value for the alignment (in bits) a C conformant malloc has to
 824    provide. This default is intended to be safe and always correct.  */
 825 #ifndef MALLOC_ABI_ALIGNMENT
 826 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
 827 #endif
 828
 829 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
 830    STACK_BOUNDARY is required.  */
 831 #ifndef PREFERRED_STACK_BOUNDARY
 832 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
 833 #endif
 834
 835 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not
 836    defined.  */
 837 #ifndef INCOMING_STACK_BOUNDARY
 838 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY
 839 #endif
 840
 841 #ifndef TARGET_DEFAULT_PACK_STRUCT
 842 #define TARGET_DEFAULT_PACK_STRUCT 0
 843 #endif
 844
 845 /* By default, the vtable entries are void pointers, the so the alignment
 846    is the same as pointer alignment.  The value of this macro specifies
 847    the alignment of the vtable entry in bits.  It should be defined only
 848    when special alignment is necessary.  */
 849 #ifndef TARGET_VTABLE_ENTRY_ALIGN
 850 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
 851 #endif
 852
 853 /* There are a few non-descriptor entries in the vtable at offsets below
 854    zero.  If these entries must be padded (say, to preserve the alignment
 855    specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
 856    words in each data entry.  */
 857 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
 858 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
 859 #endif
 860
 861 /* Decide whether it is safe to use a local alias for a virtual function
 862    when constructing thunks.  */
 863 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
 864 #ifdef ASM_OUTPUT_DEF
 865 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
 866 #else
 867 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
 868 #endif
 869 #endif
 870
 871 /* Decide whether target supports aliases.  */
 872 #ifndef TARGET_SUPPORTS_ALIASES
 873 #ifdef ASM_OUTPUT_DEF
 874 #define TARGET_SUPPORTS_ALIASES 1
 875 #else
 876 #define TARGET_SUPPORTS_ALIASES 0
 877 #endif
 878 #endif
 879
 880 /* Indicate whether the target uses "target" attributes for function
 881    multiversioning.  This is used to choose between the "target" and
 882    "target_version" attributes when expanding a "target_clones" attribute, and
 883    determine whether the "target" and "target_clones" attributes are mutually
 884    exclusive.  */
 885 #ifndef TARGET_HAS_FMV_TARGET_ATTRIBUTE
 886 #define TARGET_HAS_FMV_TARGET_ATTRIBUTE 1
 887 #endif
 888
 889
 890 /* Select a format to encode pointers in exception handling data.  We
 891    prefer those that result in fewer dynamic relocations.  Assume no
 892    special support here and encode direct references.  */
 893 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
 894 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  DW_EH_PE_absptr
 895 #endif
 896
 897 /* By default, the C++ compiler will use the lowest bit of the pointer
 898    to function to indicate a pointer-to-member-function points to a
 899    virtual member function.  However, if FUNCTION_BOUNDARY indicates
 900    function addresses aren't always even, the lowest bit of the delta
 901    field will be used.  */
 902 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
 903 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
 904   (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
 905    ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
 906 #endif
 907
 908 #ifndef DEFAULT_GDB_EXTENSIONS
 909 #define DEFAULT_GDB_EXTENSIONS 1
 910 #endif
 911
 912 /* Default to DWARF2_DEBUGGING_INFO.  Legacy targets can choose different
 913    by defining PREFERRED_DEBUGGING_TYPE.  */
 914 #ifndef PREFERRED_DEBUGGING_TYPE
 915 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_LINENO_DEBUGGING_INFO
 916 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 917 #else
 918 #error You must define PREFERRED_DEBUGGING_TYPE if DWARF is not supported
 919 #endif
 920 #endif
 921
 922 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
 923 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
 924 #endif
 925
 926 /* True if the targets integer-comparison functions return { 0, 1, 2
 927    } to indicate { <, ==, > }.  False if { -1, 0, 1 } is used
 928    instead.  The libgcc routines are biased.  */
 929 #ifndef TARGET_LIB_INT_CMP_BIASED
 930 #define TARGET_LIB_INT_CMP_BIASED (true)
 931 #endif
 932
 933 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
 934    then the word-endianness is the same as for integers.  */
 935 #ifndef FLOAT_WORDS_BIG_ENDIAN
 936 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 937 #endif
 938
 939 #ifndef REG_WORDS_BIG_ENDIAN
 940 #define REG_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 941 #endif
 942
 943
 944 #ifndef TARGET_DEC_EVAL_METHOD
 945 #define TARGET_DEC_EVAL_METHOD 2
 946 #endif
 947
 948 #ifndef HAS_LONG_COND_BRANCH
 949 #define HAS_LONG_COND_BRANCH 0
 950 #endif
 951
 952 #ifndef HAS_LONG_UNCOND_BRANCH
 953 #define HAS_LONG_UNCOND_BRANCH 0
 954 #endif
 955
 956 /* Determine whether __cxa_atexit, rather than atexit, is used to
 957    register C++ destructors for local statics and global objects.  */
 958 #ifndef DEFAULT_USE_CXA_ATEXIT
 959 #define DEFAULT_USE_CXA_ATEXIT 0
 960 #endif
 961
 962 #if GCC_VERSION >= 3000 && defined IN_GCC
 963 /* These old constraint macros shouldn't appear anywhere in a
 964    configuration using MD constraint definitions.  */
 965 #endif
 966
 967 /* Determin whether the target runtime library is Bionic */
 968 #ifndef TARGET_HAS_BIONIC
 969 #define TARGET_HAS_BIONIC 0
 970 #endif
 971
 972 /* Indicate that CLZ and CTZ are undefined at zero.  */
 973 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
 974 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
 975 #endif
 976 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
 977 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
 978 #endif
 979
 980 /* Provide a default value for STORE_FLAG_VALUE.  */
 981 #ifndef STORE_FLAG_VALUE
 982 #define STORE_FLAG_VALUE  1
 983 #endif
 984
 985 /* This macro is used to determine what the largest unit size that
 986    move_by_pieces can use is.  */
 987
 988 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
 989    move efficiently, as opposed to  MOVE_MAX which is the maximum
 990    number of bytes we can move with a single instruction.  */
 991
 992 #ifndef MOVE_MAX_PIECES
 993 #define MOVE_MAX_PIECES   MOVE_MAX
 994 #endif
 995
 996 /* STORE_MAX_PIECES is the number of bytes at a time that we can
 997    store efficiently.  Due to internal GCC limitations, this is
 998    MOVE_MAX_PIECES limited by the number of bytes GCC can represent
 999    for an immediate constant.  */
1000
1001 #ifndef STORE_MAX_PIECES
1002 #define STORE_MAX_PIECES  MIN (MOVE_MAX_PIECES, 2 * sizeof (HOST_WIDE_INT))
1003 #endif
1004
1005 /* Likewise for block comparisons.  */
1006 #ifndef COMPARE_MAX_PIECES
1007 #define COMPARE_MAX_PIECES  MOVE_MAX_PIECES
1008 #endif
1009
1010 #ifndef MAX_MOVE_MAX
1011 #define MAX_MOVE_MAX MOVE_MAX
1012 #endif
1013
1014 #ifndef MIN_UNITS_PER_WORD
1015 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
1016 #endif
1017
1018 #ifndef MAX_BITS_PER_WORD
1019 #define MAX_BITS_PER_WORD BITS_PER_WORD
1020 #endif
1021
1022 #ifndef STACK_POINTER_OFFSET
1023 #define STACK_POINTER_OFFSET    0
1024 #endif
1025
1026 #ifndef LOCAL_REGNO
1027 #define LOCAL_REGNO(REGNO)  0
1028 #endif
1029
1030 #ifndef HONOR_REG_ALLOC_ORDER
1031 #define HONOR_REG_ALLOC_ORDER 0
1032 #endif
1033
1034 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1035    the stack pointer does not matter.  The value is tested only in
1036    functions that have frame pointers.  */
1037 #ifndef EXIT_IGNORE_STACK
1038 #define EXIT_IGNORE_STACK 0
1039 #endif
1040
1041 /* Assume that case vectors are not pc-relative.  */
1042 #ifndef CASE_VECTOR_PC_RELATIVE
1043 #define CASE_VECTOR_PC_RELATIVE 0
1044 #endif
1045
1046 /* Force minimum alignment to be able to use the least significant bits
1047    for distinguishing descriptor addresses from code addresses.  */
1048 #define FUNCTION_ALIGNMENT(ALIGN)                                       \
1049   (lang_hooks.custom_function_descriptors                               \
1050    && targetm.calls.custom_function_descriptors > 0                     \
1051    ? MAX ((ALIGN),                                              \
1052           2 * targetm.calls.custom_function_descriptors * BITS_PER_UNIT)\
1053    : (ALIGN))
1054
1055 /* Assume that trampolines need function alignment.  */
1056 #ifndef TRAMPOLINE_ALIGNMENT
1057 #define TRAMPOLINE_ALIGNMENT FUNCTION_ALIGNMENT (FUNCTION_BOUNDARY)
1058 #endif
1059
1060 /* Register mappings for target machines without register windows.  */
1061 #ifndef INCOMING_REGNO
1062 #define INCOMING_REGNO(N) (N)
1063 #endif
1064
1065 #ifndef OUTGOING_REGNO
1066 #define OUTGOING_REGNO(N) (N)
1067 #endif
1068
1069 #ifndef SHIFT_COUNT_TRUNCATED
1070 #define SHIFT_COUNT_TRUNCATED 0
1071 #endif
1072
1073 #ifndef LEGITIMATE_PIC_OPERAND_P
1074 #define LEGITIMATE_PIC_OPERAND_P(X) 1
1075 #endif
1076
1077 #ifndef TARGET_MEM_CONSTRAINT
1078 #define TARGET_MEM_CONSTRAINT 'm'
1079 #endif
1080
1081 #ifndef REVERSIBLE_CC_MODE
1082 #define REVERSIBLE_CC_MODE(MODE) 0
1083 #endif
1084
1085 /* Biggest alignment supported by the object file format of this machine.  */
1086 #ifndef MAX_OFILE_ALIGNMENT
1087 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
1088 #endif
1089
1090 #ifndef FRAME_GROWS_DOWNWARD
1091 #define FRAME_GROWS_DOWNWARD 0
1092 #endif
1093
1094 #ifndef RETURN_ADDR_IN_PREVIOUS_FRAME
1095 #define RETURN_ADDR_IN_PREVIOUS_FRAME 0
1096 #endif
1097
1098 /* On most machines, the CFA coincides with the first incoming parm.  */
1099 #ifndef ARG_POINTER_CFA_OFFSET
1100 #define ARG_POINTER_CFA_OFFSET(FNDECL) \
1101   (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
1102 #endif
1103
1104 /* On most machines, we use the CFA as DW_AT_frame_base.  */
1105 #ifndef CFA_FRAME_BASE_OFFSET
1106 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0
1107 #endif
1108
1109 /* The offset from the incoming value of %sp to the top of the stack frame
1110    for the current function.  */
1111 #ifndef INCOMING_FRAME_SP_OFFSET
1112 #define INCOMING_FRAME_SP_OFFSET 0
1113 #endif
1114
1115 #ifndef HARD_REGNO_NREGS_HAS_PADDING
1116 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
1117 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
1118 #endif
1119
1120 #ifndef OUTGOING_REG_PARM_STACK_SPACE
1121 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
1122 #endif
1123
1124 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
1125    the backend.  MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
1126    effort stack alignment supported by the backend.  If the backend
1127    supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
1128    MAX_STACK_ALIGNMENT are the same.  Otherwise, the incoming stack
1129    boundary will limit the maximum guaranteed stack alignment.  */
1130 #ifdef MAX_STACK_ALIGNMENT
1131 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
1132 #else
1133 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY
1134 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
1135 #endif
1136
1137 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
1138
1139 #ifndef LOCAL_ALIGNMENT
1140 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
1141 #endif
1142
1143 #ifndef STACK_SLOT_ALIGNMENT
1144 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
1145   ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
1146 #endif
1147
1148 #ifndef LOCAL_DECL_ALIGNMENT
1149 #define LOCAL_DECL_ALIGNMENT(DECL) \
1150   LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
1151 #endif
1152
1153 #ifndef MINIMUM_ALIGNMENT
1154 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN)
1155 #endif
1156
1157 /* Alignment value for attribute ((aligned)).  */
1158 #ifndef ATTRIBUTE_ALIGNED_VALUE
1159 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
1160 #endif
1161
1162 /* For most ports anything that evaluates to a constant symbolic
1163    or integer value is acceptable as a constant address.  */
1164 #ifndef CONSTANT_ADDRESS_P
1165 #define CONSTANT_ADDRESS_P(X)   (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE)
1166 #endif
1167
1168 #ifndef MAX_FIXED_MODE_SIZE
1169 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
1170 #endif
1171
1172 /* Nonzero if structures and unions should be returned in memory.
1173
1174    This should only be defined if compatibility with another compiler or
1175    with an ABI is needed, because it results in slower code.  */
1176
1177 #ifndef DEFAULT_PCC_STRUCT_RETURN
1178 #define DEFAULT_PCC_STRUCT_RETURN 1
1179 #endif
1180
1181 #ifndef PCC_BITFIELD_TYPE_MATTERS
1182 #define PCC_BITFIELD_TYPE_MATTERS false
1183 #endif
1184
1185 #ifndef INSN_SETS_ARE_DELAYED
1186 #define INSN_SETS_ARE_DELAYED(INSN) false
1187 #endif
1188
1189 #ifndef INSN_REFERENCES_ARE_DELAYED
1190 #define INSN_REFERENCES_ARE_DELAYED(INSN) false
1191 #endif
1192
1193 #ifndef NO_FUNCTION_CSE
1194 #define NO_FUNCTION_CSE false
1195 #endif
1196
1197 #ifndef HARD_REGNO_RENAME_OK
1198 #define HARD_REGNO_RENAME_OK(FROM, TO) true
1199 #endif
1200
1201 #ifndef EPILOGUE_USES
1202 #define EPILOGUE_USES(REG) false
1203 #endif
1204
1205 #ifndef ARGS_GROW_DOWNWARD
1206 #define ARGS_GROW_DOWNWARD 0
1207 #endif
1208
1209 #ifndef STACK_GROWS_DOWNWARD
1210 #define STACK_GROWS_DOWNWARD 0
1211 #endif
1212
1213 #ifndef STACK_PUSH_CODE
1214 #if STACK_GROWS_DOWNWARD
1215 #define STACK_PUSH_CODE PRE_DEC
1216 #else
1217 #define STACK_PUSH_CODE PRE_INC
1218 #endif
1219 #endif
1220
1221 /* Default value for flag_pie when flag_pie is initialized to -1:
1222    --enable-default-pie: Default flag_pie to -fPIE.
1223    --disable-default-pie: Default flag_pie to 0.
1224  */
1225 #ifdef ENABLE_DEFAULT_PIE
1226 # ifndef DEFAULT_FLAG_PIE
1227 #  define DEFAULT_FLAG_PIE 2
1228 # endif
1229 #else
1230 # define DEFAULT_FLAG_PIE 0
1231 #endif
1232
1233 #ifndef SWITCHABLE_TARGET
1234 #define SWITCHABLE_TARGET 0
1235 #endif
1236
1237 /* If the target supports integers that are wider than two
1238    HOST_WIDE_INTs on the host compiler, then the target should define
1239    TARGET_SUPPORTS_WIDE_INT and make the appropriate fixups.
1240    Otherwise the compiler really is not robust.  */
1241 #ifndef TARGET_SUPPORTS_WIDE_INT
1242 #define TARGET_SUPPORTS_WIDE_INT 0
1243 #endif
1244
1245 #ifndef SHORT_IMMEDIATES_SIGN_EXTEND
1246 #define SHORT_IMMEDIATES_SIGN_EXTEND 0
1247 #endif
1248
1249 #ifndef WORD_REGISTER_OPERATIONS
1250 #define WORD_REGISTER_OPERATIONS 0
1251 #endif
1252
1253 #ifndef LOAD_EXTEND_OP
1254 #define LOAD_EXTEND_OP(M) UNKNOWN
1255 #endif
1256
1257 #ifndef INITIAL_FRAME_ADDRESS_RTX
1258 #define INITIAL_FRAME_ADDRESS_RTX NULL
1259 #endif
1260
1261 #ifndef SETUP_FRAME_ADDRESSES
1262 #define SETUP_FRAME_ADDRESSES() do { } while (0)
1263 #endif
1264
1265 #ifndef DYNAMIC_CHAIN_ADDRESS
1266 #define DYNAMIC_CHAIN_ADDRESS(x) (x)
1267 #endif
1268
1269 #ifndef FRAME_ADDR_RTX
1270 #define FRAME_ADDR_RTX(x) (x)
1271 #endif
1272
1273 #ifndef REVERSE_CONDITION
1274 #define REVERSE_CONDITION(code, mode) reverse_condition (code)
1275 #endif
1276
1277 #ifndef TARGET_PECOFF
1278 #define TARGET_PECOFF 0
1279 #endif
1280
1281 #ifndef TARGET_COFF
1282 #define TARGET_COFF 0
1283 #endif
1284
1285 #ifndef EH_RETURN_HANDLER_RTX
1286 #define EH_RETURN_HANDLER_RTX NULL
1287 #endif
1288
1289 #ifdef GCC_INSN_FLAGS_H
1290 /* Dependent default target macro definitions
1291
1292    This section of defaults.h defines target macros that depend on generated
1293    headers.  This is a bit awkward:  We want to put all default definitions
1294    for target macros in defaults.h, but some of the defaults depend on the
1295    HAVE_* flags defines of insn-flags.h.  But insn-flags.h is not always
1296    included by files that do include defaults.h.
1297
1298    Fortunately, the default macro definitions that depend on the HAVE_*
1299    macros are also the ones that will only be used inside GCC itself, i.e.
1300    not in the gen* programs or in target objects like libgcc.
1301
1302    Obviously, it would be best to keep this section of defaults.h as small
1303    as possible, by converting the macros defined below to target hooks or
1304    functions.
1305 */
1306
1307 /* The default branch cost is 1.  */
1308 #ifndef BRANCH_COST
1309 #define BRANCH_COST(speed_p, predictable_p) 1
1310 #endif
1311
1312 /* If a memory-to-memory move would take MOVE_RATIO or more simple
1313    move-instruction sequences, we will do a cpymem or libcall instead.  */
1314
1315 #ifndef MOVE_RATIO
1316 #if defined (HAVE_cpymemqi) || defined (HAVE_cpymemhi) || defined (HAVE_cpymemsi) || defined (HAVE_cpymemdi) || defined (HAVE_cpymemti)
1317 #define MOVE_RATIO(speed) 2
1318 #else
1319 /* If we are optimizing for space (-Os), cut down the default move ratio.  */
1320 #define MOVE_RATIO(speed) ((speed) ? 15 : 3)
1321 #endif
1322 #endif
1323
1324 /* If a clear memory operation would take CLEAR_RATIO or more simple
1325    move-instruction sequences, we will do a setmem or libcall instead.  */
1326
1327 #ifndef CLEAR_RATIO
1328 #if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
1329 #define CLEAR_RATIO(speed) 2
1330 #else
1331 /* If we are optimizing for space, cut down the default clear ratio.  */
1332 #define CLEAR_RATIO(speed) ((speed) ? 15 :3)
1333 #endif
1334 #endif
1335
1336 /* If a memory set (to value other than zero) operation would take
1337    SET_RATIO or more simple move-instruction sequences, we will do a setmem
1338    or libcall instead.  */
1339 #ifndef SET_RATIO
1340 #define SET_RATIO(speed) MOVE_RATIO (speed)
1341 #endif
1342
1343 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
1344    Normally move_insn, so Pmode stack pointer.  */
1345
1346 #ifndef STACK_SAVEAREA_MODE
1347 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
1348 #endif
1349
1350 /* Supply a default definition of STACK_SIZE_MODE for
1351    allocate_dynamic_stack_space.  Normally PLUS/MINUS, so word_mode.  */
1352
1353 #ifndef STACK_SIZE_MODE
1354 #define STACK_SIZE_MODE word_mode
1355 #endif
1356
1357 /* Default value for flag_stack_protect when flag_stack_protect is initialized to -1:
1358    --enable-default-ssp: Default flag_stack_protect to -fstack-protector-strong.
1359    --disable-default-ssp: Default flag_stack_protect to 0.
1360  */
1361 #ifdef ENABLE_DEFAULT_SSP
1362 # ifndef DEFAULT_FLAG_SSP
1363 #  define DEFAULT_FLAG_SSP 3
1364 # endif
1365 #else
1366 # define DEFAULT_FLAG_SSP 0
1367 #endif
1368
1369 /* Provide default values for the macros controlling stack checking.  */
1370
1371 /* The default is neither full builtin stack checking...  */
1372 #ifndef STACK_CHECK_BUILTIN
1373 #define STACK_CHECK_BUILTIN 0
1374 #endif
1375
1376 /* ...nor static builtin stack checking.  */
1377 #ifndef STACK_CHECK_STATIC_BUILTIN
1378 #define STACK_CHECK_STATIC_BUILTIN 0
1379 #endif
1380
1381 /* The default interval is one page (4096 bytes).  */
1382 #ifndef STACK_CHECK_PROBE_INTERVAL_EXP
1383 #define STACK_CHECK_PROBE_INTERVAL_EXP 12
1384 #endif
1385
1386 /* The default is not to move the stack pointer.  */
1387 #ifndef STACK_CHECK_MOVING_SP
1388 #define STACK_CHECK_MOVING_SP 0
1389 #endif
1390
1391 /* This is a kludge to try to capture the discrepancy between the old
1392    mechanism (generic stack checking) and the new mechanism (static
1393    builtin stack checking).  STACK_CHECK_PROTECT needs to be bumped
1394    for the latter because part of the protection area is effectively
1395    included in STACK_CHECK_MAX_FRAME_SIZE for the former.  */
1396 #ifdef STACK_CHECK_PROTECT
1397 #define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
1398 #else
1399 #define STACK_OLD_CHECK_PROTECT                                         \
1400  (!global_options.x_flag_exceptions                                     \
1401   ? 75 * UNITS_PER_WORD                                                 \
1402   : targetm_common.except_unwind_info (&global_options) == UI_SJLJ      \
1403     ? 4 * 1024                                                          \
1404     : 8 * 1024)
1405 #endif
1406
1407 /* Minimum amount of stack required to recover from an anticipated stack
1408    overflow detection.  The default value conveys an estimate of the amount
1409    of stack required to propagate an exception.  */
1410 #ifndef STACK_CHECK_PROTECT
1411 #define STACK_CHECK_PROTECT                                             \
1412  (!global_options.x_flag_exceptions                                     \
1413   ? 4 * 1024                                                            \
1414   : targetm_common.except_unwind_info (&global_options) == UI_SJLJ      \
1415     ? 8 * 1024                                                          \
1416     : 12 * 1024)
1417 #endif
1418
1419 /* Make the maximum frame size be the largest we can and still only need
1420    one probe per function.  */
1421 #ifndef STACK_CHECK_MAX_FRAME_SIZE
1422 #define STACK_CHECK_MAX_FRAME_SIZE \
1423   ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD)
1424 #endif
1425
1426 /* This is arbitrary, but should be large enough everywhere.  */
1427 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
1428 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
1429 #endif
1430
1431 /* Provide a reasonable default for the maximum size of an object to
1432    allocate in the fixed frame.  We may need to be able to make this
1433    controllable by the user at some point.  */
1434 #ifndef STACK_CHECK_MAX_VAR_SIZE
1435 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
1436 #endif
1437
1438 /* By default, the C++ compiler will use function addresses in the
1439    vtable entries.  Setting this nonzero tells the compiler to use
1440    function descriptors instead.  The value of this macro says how
1441    many words wide the descriptor is (normally 2).  It is assumed
1442    that the address of a function descriptor may be treated as a
1443    pointer to a function.  */
1444 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
1445 #define TARGET_VTABLE_USES_DESCRIPTORS 0
1446 #endif
1447
1448 #endif /* GCC_INSN_FLAGS_H  */
1449
1450 #ifndef DWARF_GNAT_ENCODINGS_DEFAULT
1451 #define DWARF_GNAT_ENCODINGS_DEFAULT DWARF_GNAT_ENCODINGS_GDB
1452 #endif
1453
1454 /* When generating dwarf info, the default standard version we'll honor
1455    and advertise in absence of -gdwarf-<N> on the command line.  */
1456 #ifndef DWARF_VERSION_DEFAULT
1457 #define DWARF_VERSION_DEFAULT 5
1458 #endif
1459
1460 #ifndef USED_FOR_TARGET
1461 /* Done this way to keep gengtype happy.  */
1462 #if BITS_PER_UNIT == 8
1463 #define TARGET_UNIT uint8_t
1464 #elif BITS_PER_UNIT == 16
1465 #define TARGET_UNIT uint16_t
1466 #elif BITS_PER_UNIT == 32
1467 #define TARGET_UNIT uint32_t
1468 #else
1469 #error Unknown BITS_PER_UNIT
1470 #endif
1471 typedef TARGET_UNIT target_unit;
1472 #endif
1473
1474 #endif  /* ! GCC_DEFAULTS_H */