gcc/defaults.h

   1 /* Definitions of various defaults for tm.h macros.
   2    Copyright (C) 1992-2023 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   ASM_OUTPUT_LABEL ((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 /* Select a format to encode pointers in exception handling data.  We
 881    prefer those that result in fewer dynamic relocations.  Assume no
 882    special support here and encode direct references.  */
 883 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
 884 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  DW_EH_PE_absptr
 885 #endif
 886
 887 /* By default, the C++ compiler will use the lowest bit of the pointer
 888    to function to indicate a pointer-to-member-function points to a
 889    virtual member function.  However, if FUNCTION_BOUNDARY indicates
 890    function addresses aren't always even, the lowest bit of the delta
 891    field will be used.  */
 892 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
 893 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
 894   (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
 895    ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
 896 #endif
 897
 898 #ifndef DEFAULT_GDB_EXTENSIONS
 899 #define DEFAULT_GDB_EXTENSIONS 1
 900 #endif
 901
 902 /* Default to DWARF2_DEBUGGING_INFO.  Legacy targets can choose different
 903    by defining PREFERRED_DEBUGGING_TYPE.  */
 904 #ifndef PREFERRED_DEBUGGING_TYPE
 905 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_LINENO_DEBUGGING_INFO
 906 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 907 #else
 908 #error You must define PREFERRED_DEBUGGING_TYPE if DWARF is not supported
 909 #endif
 910 #endif
 911
 912 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
 913 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
 914 #endif
 915
 916 /* True if the targets integer-comparison functions return { 0, 1, 2
 917    } to indicate { <, ==, > }.  False if { -1, 0, 1 } is used
 918    instead.  The libgcc routines are biased.  */
 919 #ifndef TARGET_LIB_INT_CMP_BIASED
 920 #define TARGET_LIB_INT_CMP_BIASED (true)
 921 #endif
 922
 923 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
 924    then the word-endianness is the same as for integers.  */
 925 #ifndef FLOAT_WORDS_BIG_ENDIAN
 926 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 927 #endif
 928
 929 #ifndef REG_WORDS_BIG_ENDIAN
 930 #define REG_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 931 #endif
 932
 933
 934 #ifndef TARGET_DEC_EVAL_METHOD
 935 #define TARGET_DEC_EVAL_METHOD 2
 936 #endif
 937
 938 #ifndef HAS_LONG_COND_BRANCH
 939 #define HAS_LONG_COND_BRANCH 0
 940 #endif
 941
 942 #ifndef HAS_LONG_UNCOND_BRANCH
 943 #define HAS_LONG_UNCOND_BRANCH 0
 944 #endif
 945
 946 /* Determine whether __cxa_atexit, rather than atexit, is used to
 947    register C++ destructors for local statics and global objects.  */
 948 #ifndef DEFAULT_USE_CXA_ATEXIT
 949 #define DEFAULT_USE_CXA_ATEXIT 0
 950 #endif
 951
 952 #if GCC_VERSION >= 3000 && defined IN_GCC
 953 /* These old constraint macros shouldn't appear anywhere in a
 954    configuration using MD constraint definitions.  */
 955 #endif
 956
 957 /* Determin whether the target runtime library is Bionic */
 958 #ifndef TARGET_HAS_BIONIC
 959 #define TARGET_HAS_BIONIC 0
 960 #endif
 961
 962 /* Indicate that CLZ and CTZ are undefined at zero.  */
 963 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
 964 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
 965 #endif
 966 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
 967 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
 968 #endif
 969
 970 /* Provide a default value for STORE_FLAG_VALUE.  */
 971 #ifndef STORE_FLAG_VALUE
 972 #define STORE_FLAG_VALUE  1
 973 #endif
 974
 975 /* This macro is used to determine what the largest unit size that
 976    move_by_pieces can use is.  */
 977
 978 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
 979    move efficiently, as opposed to  MOVE_MAX which is the maximum
 980    number of bytes we can move with a single instruction.  */
 981
 982 #ifndef MOVE_MAX_PIECES
 983 #define MOVE_MAX_PIECES   MOVE_MAX
 984 #endif
 985
 986 /* STORE_MAX_PIECES is the number of bytes at a time that we can
 987    store efficiently.  Due to internal GCC limitations, this is
 988    MOVE_MAX_PIECES limited by the number of bytes GCC can represent
 989    for an immediate constant.  */
 990
 991 #ifndef STORE_MAX_PIECES
 992 #define STORE_MAX_PIECES  MIN (MOVE_MAX_PIECES, 2 * sizeof (HOST_WIDE_INT))
 993 #endif
 994
 995 /* Likewise for block comparisons.  */
 996 #ifndef COMPARE_MAX_PIECES
 997 #define COMPARE_MAX_PIECES  MOVE_MAX_PIECES
 998 #endif
 999
1000 #ifndef MAX_MOVE_MAX
1001 #define MAX_MOVE_MAX MOVE_MAX
1002 #endif
1003
1004 #ifndef MIN_UNITS_PER_WORD
1005 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
1006 #endif
1007
1008 #ifndef MAX_BITS_PER_WORD
1009 #define MAX_BITS_PER_WORD BITS_PER_WORD
1010 #endif
1011
1012 #ifndef STACK_POINTER_OFFSET
1013 #define STACK_POINTER_OFFSET    0
1014 #endif
1015
1016 #ifndef LOCAL_REGNO
1017 #define LOCAL_REGNO(REGNO)  0
1018 #endif
1019
1020 #ifndef HONOR_REG_ALLOC_ORDER
1021 #define HONOR_REG_ALLOC_ORDER 0
1022 #endif
1023
1024 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1025    the stack pointer does not matter.  The value is tested only in
1026    functions that have frame pointers.  */
1027 #ifndef EXIT_IGNORE_STACK
1028 #define EXIT_IGNORE_STACK 0
1029 #endif
1030
1031 /* Assume that case vectors are not pc-relative.  */
1032 #ifndef CASE_VECTOR_PC_RELATIVE
1033 #define CASE_VECTOR_PC_RELATIVE 0
1034 #endif
1035
1036 /* Force minimum alignment to be able to use the least significant bits
1037    for distinguishing descriptor addresses from code addresses.  */
1038 #define FUNCTION_ALIGNMENT(ALIGN)                                       \
1039   (lang_hooks.custom_function_descriptors                               \
1040    && targetm.calls.custom_function_descriptors > 0                     \
1041    ? MAX ((ALIGN),                                              \
1042           2 * targetm.calls.custom_function_descriptors * BITS_PER_UNIT)\
1043    : (ALIGN))
1044
1045 /* Assume that trampolines need function alignment.  */
1046 #ifndef TRAMPOLINE_ALIGNMENT
1047 #define TRAMPOLINE_ALIGNMENT FUNCTION_ALIGNMENT (FUNCTION_BOUNDARY)
1048 #endif
1049
1050 /* Register mappings for target machines without register windows.  */
1051 #ifndef INCOMING_REGNO
1052 #define INCOMING_REGNO(N) (N)
1053 #endif
1054
1055 #ifndef OUTGOING_REGNO
1056 #define OUTGOING_REGNO(N) (N)
1057 #endif
1058
1059 #ifndef SHIFT_COUNT_TRUNCATED
1060 #define SHIFT_COUNT_TRUNCATED 0
1061 #endif
1062
1063 #ifndef LEGITIMATE_PIC_OPERAND_P
1064 #define LEGITIMATE_PIC_OPERAND_P(X) 1
1065 #endif
1066
1067 #ifndef TARGET_MEM_CONSTRAINT
1068 #define TARGET_MEM_CONSTRAINT 'm'
1069 #endif
1070
1071 #ifndef REVERSIBLE_CC_MODE
1072 #define REVERSIBLE_CC_MODE(MODE) 0
1073 #endif
1074
1075 /* Biggest alignment supported by the object file format of this machine.  */
1076 #ifndef MAX_OFILE_ALIGNMENT
1077 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
1078 #endif
1079
1080 #ifndef FRAME_GROWS_DOWNWARD
1081 #define FRAME_GROWS_DOWNWARD 0
1082 #endif
1083
1084 #ifndef RETURN_ADDR_IN_PREVIOUS_FRAME
1085 #define RETURN_ADDR_IN_PREVIOUS_FRAME 0
1086 #endif
1087
1088 /* On most machines, the CFA coincides with the first incoming parm.  */
1089 #ifndef ARG_POINTER_CFA_OFFSET
1090 #define ARG_POINTER_CFA_OFFSET(FNDECL) \
1091   (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
1092 #endif
1093
1094 /* On most machines, we use the CFA as DW_AT_frame_base.  */
1095 #ifndef CFA_FRAME_BASE_OFFSET
1096 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0
1097 #endif
1098
1099 /* The offset from the incoming value of %sp to the top of the stack frame
1100    for the current function.  */
1101 #ifndef INCOMING_FRAME_SP_OFFSET
1102 #define INCOMING_FRAME_SP_OFFSET 0
1103 #endif
1104
1105 #ifndef HARD_REGNO_NREGS_HAS_PADDING
1106 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
1107 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
1108 #endif
1109
1110 #ifndef OUTGOING_REG_PARM_STACK_SPACE
1111 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
1112 #endif
1113
1114 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
1115    the backend.  MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
1116    effort stack alignment supported by the backend.  If the backend
1117    supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
1118    MAX_STACK_ALIGNMENT are the same.  Otherwise, the incoming stack
1119    boundary will limit the maximum guaranteed stack alignment.  */
1120 #ifdef MAX_STACK_ALIGNMENT
1121 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
1122 #else
1123 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY
1124 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
1125 #endif
1126
1127 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
1128
1129 #ifndef LOCAL_ALIGNMENT
1130 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
1131 #endif
1132
1133 #ifndef STACK_SLOT_ALIGNMENT
1134 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
1135   ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
1136 #endif
1137
1138 #ifndef LOCAL_DECL_ALIGNMENT
1139 #define LOCAL_DECL_ALIGNMENT(DECL) \
1140   LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
1141 #endif
1142
1143 #ifndef MINIMUM_ALIGNMENT
1144 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN)
1145 #endif
1146
1147 /* Alignment value for attribute ((aligned)).  */
1148 #ifndef ATTRIBUTE_ALIGNED_VALUE
1149 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
1150 #endif
1151
1152 /* For most ports anything that evaluates to a constant symbolic
1153    or integer value is acceptable as a constant address.  */
1154 #ifndef CONSTANT_ADDRESS_P
1155 #define CONSTANT_ADDRESS_P(X)   (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE)
1156 #endif
1157
1158 #ifndef MAX_FIXED_MODE_SIZE
1159 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
1160 #endif
1161
1162 /* Nonzero if structures and unions should be returned in memory.
1163
1164    This should only be defined if compatibility with another compiler or
1165    with an ABI is needed, because it results in slower code.  */
1166
1167 #ifndef DEFAULT_PCC_STRUCT_RETURN
1168 #define DEFAULT_PCC_STRUCT_RETURN 1
1169 #endif
1170
1171 #ifndef PCC_BITFIELD_TYPE_MATTERS
1172 #define PCC_BITFIELD_TYPE_MATTERS false
1173 #endif
1174
1175 #ifndef INSN_SETS_ARE_DELAYED
1176 #define INSN_SETS_ARE_DELAYED(INSN) false
1177 #endif
1178
1179 #ifndef INSN_REFERENCES_ARE_DELAYED
1180 #define INSN_REFERENCES_ARE_DELAYED(INSN) false
1181 #endif
1182
1183 #ifndef NO_FUNCTION_CSE
1184 #define NO_FUNCTION_CSE false
1185 #endif
1186
1187 #ifndef HARD_REGNO_RENAME_OK
1188 #define HARD_REGNO_RENAME_OK(FROM, TO) true
1189 #endif
1190
1191 #ifndef EPILOGUE_USES
1192 #define EPILOGUE_USES(REG) false
1193 #endif
1194
1195 #ifndef ARGS_GROW_DOWNWARD
1196 #define ARGS_GROW_DOWNWARD 0
1197 #endif
1198
1199 #ifndef STACK_GROWS_DOWNWARD
1200 #define STACK_GROWS_DOWNWARD 0
1201 #endif
1202
1203 #ifndef STACK_PUSH_CODE
1204 #if STACK_GROWS_DOWNWARD
1205 #define STACK_PUSH_CODE PRE_DEC
1206 #else
1207 #define STACK_PUSH_CODE PRE_INC
1208 #endif
1209 #endif
1210
1211 /* Default value for flag_pie when flag_pie is initialized to -1:
1212    --enable-default-pie: Default flag_pie to -fPIE.
1213    --disable-default-pie: Default flag_pie to 0.
1214  */
1215 #ifdef ENABLE_DEFAULT_PIE
1216 # ifndef DEFAULT_FLAG_PIE
1217 #  define DEFAULT_FLAG_PIE 2
1218 # endif
1219 #else
1220 # define DEFAULT_FLAG_PIE 0
1221 #endif
1222
1223 #ifndef SWITCHABLE_TARGET
1224 #define SWITCHABLE_TARGET 0
1225 #endif
1226
1227 /* If the target supports integers that are wider than two
1228    HOST_WIDE_INTs on the host compiler, then the target should define
1229    TARGET_SUPPORTS_WIDE_INT and make the appropriate fixups.
1230    Otherwise the compiler really is not robust.  */
1231 #ifndef TARGET_SUPPORTS_WIDE_INT
1232 #define TARGET_SUPPORTS_WIDE_INT 0
1233 #endif
1234
1235 #ifndef SHORT_IMMEDIATES_SIGN_EXTEND
1236 #define SHORT_IMMEDIATES_SIGN_EXTEND 0
1237 #endif
1238
1239 #ifndef WORD_REGISTER_OPERATIONS
1240 #define WORD_REGISTER_OPERATIONS 0
1241 #endif
1242
1243 #ifndef LOAD_EXTEND_OP
1244 #define LOAD_EXTEND_OP(M) UNKNOWN
1245 #endif
1246
1247 #ifndef INITIAL_FRAME_ADDRESS_RTX
1248 #define INITIAL_FRAME_ADDRESS_RTX NULL
1249 #endif
1250
1251 #ifndef SETUP_FRAME_ADDRESSES
1252 #define SETUP_FRAME_ADDRESSES() do { } while (0)
1253 #endif
1254
1255 #ifndef DYNAMIC_CHAIN_ADDRESS
1256 #define DYNAMIC_CHAIN_ADDRESS(x) (x)
1257 #endif
1258
1259 #ifndef FRAME_ADDR_RTX
1260 #define FRAME_ADDR_RTX(x) (x)
1261 #endif
1262
1263 #ifndef REVERSE_CONDITION
1264 #define REVERSE_CONDITION(code, mode) reverse_condition (code)
1265 #endif
1266
1267 #ifndef TARGET_PECOFF
1268 #define TARGET_PECOFF 0
1269 #endif
1270
1271 #ifndef TARGET_COFF
1272 #define TARGET_COFF 0
1273 #endif
1274
1275 #ifndef EH_RETURN_HANDLER_RTX
1276 #define EH_RETURN_HANDLER_RTX NULL
1277 #endif
1278
1279 #ifdef GCC_INSN_FLAGS_H
1280 /* Dependent default target macro definitions
1281
1282    This section of defaults.h defines target macros that depend on generated
1283    headers.  This is a bit awkward:  We want to put all default definitions
1284    for target macros in defaults.h, but some of the defaults depend on the
1285    HAVE_* flags defines of insn-flags.h.  But insn-flags.h is not always
1286    included by files that do include defaults.h.
1287
1288    Fortunately, the default macro definitions that depend on the HAVE_*
1289    macros are also the ones that will only be used inside GCC itself, i.e.
1290    not in the gen* programs or in target objects like libgcc.
1291
1292    Obviously, it would be best to keep this section of defaults.h as small
1293    as possible, by converting the macros defined below to target hooks or
1294    functions.
1295 */
1296
1297 /* The default branch cost is 1.  */
1298 #ifndef BRANCH_COST
1299 #define BRANCH_COST(speed_p, predictable_p) 1
1300 #endif
1301
1302 /* If a memory-to-memory move would take MOVE_RATIO or more simple
1303    move-instruction sequences, we will do a cpymem or libcall instead.  */
1304
1305 #ifndef MOVE_RATIO
1306 #if defined (HAVE_cpymemqi) || defined (HAVE_cpymemhi) || defined (HAVE_cpymemsi) || defined (HAVE_cpymemdi) || defined (HAVE_cpymemti)
1307 #define MOVE_RATIO(speed) 2
1308 #else
1309 /* If we are optimizing for space (-Os), cut down the default move ratio.  */
1310 #define MOVE_RATIO(speed) ((speed) ? 15 : 3)
1311 #endif
1312 #endif
1313
1314 /* If a clear memory operation would take CLEAR_RATIO or more simple
1315    move-instruction sequences, we will do a setmem or libcall instead.  */
1316
1317 #ifndef CLEAR_RATIO
1318 #if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
1319 #define CLEAR_RATIO(speed) 2
1320 #else
1321 /* If we are optimizing for space, cut down the default clear ratio.  */
1322 #define CLEAR_RATIO(speed) ((speed) ? 15 :3)
1323 #endif
1324 #endif
1325
1326 /* If a memory set (to value other than zero) operation would take
1327    SET_RATIO or more simple move-instruction sequences, we will do a setmem
1328    or libcall instead.  */
1329 #ifndef SET_RATIO
1330 #define SET_RATIO(speed) MOVE_RATIO (speed)
1331 #endif
1332
1333 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
1334    Normally move_insn, so Pmode stack pointer.  */
1335
1336 #ifndef STACK_SAVEAREA_MODE
1337 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
1338 #endif
1339
1340 /* Supply a default definition of STACK_SIZE_MODE for
1341    allocate_dynamic_stack_space.  Normally PLUS/MINUS, so word_mode.  */
1342
1343 #ifndef STACK_SIZE_MODE
1344 #define STACK_SIZE_MODE word_mode
1345 #endif
1346
1347 /* Default value for flag_stack_protect when flag_stack_protect is initialized to -1:
1348    --enable-default-ssp: Default flag_stack_protect to -fstack-protector-strong.
1349    --disable-default-ssp: Default flag_stack_protect to 0.
1350  */
1351 #ifdef ENABLE_DEFAULT_SSP
1352 # ifndef DEFAULT_FLAG_SSP
1353 #  define DEFAULT_FLAG_SSP 3
1354 # endif
1355 #else
1356 # define DEFAULT_FLAG_SSP 0
1357 #endif
1358
1359 /* Provide default values for the macros controlling stack checking.  */
1360
1361 /* The default is neither full builtin stack checking...  */
1362 #ifndef STACK_CHECK_BUILTIN
1363 #define STACK_CHECK_BUILTIN 0
1364 #endif
1365
1366 /* ...nor static builtin stack checking.  */
1367 #ifndef STACK_CHECK_STATIC_BUILTIN
1368 #define STACK_CHECK_STATIC_BUILTIN 0
1369 #endif
1370
1371 /* The default interval is one page (4096 bytes).  */
1372 #ifndef STACK_CHECK_PROBE_INTERVAL_EXP
1373 #define STACK_CHECK_PROBE_INTERVAL_EXP 12
1374 #endif
1375
1376 /* The default is not to move the stack pointer.  */
1377 #ifndef STACK_CHECK_MOVING_SP
1378 #define STACK_CHECK_MOVING_SP 0
1379 #endif
1380
1381 /* This is a kludge to try to capture the discrepancy between the old
1382    mechanism (generic stack checking) and the new mechanism (static
1383    builtin stack checking).  STACK_CHECK_PROTECT needs to be bumped
1384    for the latter because part of the protection area is effectively
1385    included in STACK_CHECK_MAX_FRAME_SIZE for the former.  */
1386 #ifdef STACK_CHECK_PROTECT
1387 #define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
1388 #else
1389 #define STACK_OLD_CHECK_PROTECT                                         \
1390  (!global_options.x_flag_exceptions                                     \
1391   ? 75 * UNITS_PER_WORD                                                 \
1392   : targetm_common.except_unwind_info (&global_options) == UI_SJLJ      \
1393     ? 4 * 1024                                                          \
1394     : 8 * 1024)
1395 #endif
1396
1397 /* Minimum amount of stack required to recover from an anticipated stack
1398    overflow detection.  The default value conveys an estimate of the amount
1399    of stack required to propagate an exception.  */
1400 #ifndef STACK_CHECK_PROTECT
1401 #define STACK_CHECK_PROTECT                                             \
1402  (!global_options.x_flag_exceptions                                     \
1403   ? 4 * 1024                                                            \
1404   : targetm_common.except_unwind_info (&global_options) == UI_SJLJ      \
1405     ? 8 * 1024                                                          \
1406     : 12 * 1024)
1407 #endif
1408
1409 /* Make the maximum frame size be the largest we can and still only need
1410    one probe per function.  */
1411 #ifndef STACK_CHECK_MAX_FRAME_SIZE
1412 #define STACK_CHECK_MAX_FRAME_SIZE \
1413   ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD)
1414 #endif
1415
1416 /* This is arbitrary, but should be large enough everywhere.  */
1417 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
1418 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
1419 #endif
1420
1421 /* Provide a reasonable default for the maximum size of an object to
1422    allocate in the fixed frame.  We may need to be able to make this
1423    controllable by the user at some point.  */
1424 #ifndef STACK_CHECK_MAX_VAR_SIZE
1425 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
1426 #endif
1427
1428 /* By default, the C++ compiler will use function addresses in the
1429    vtable entries.  Setting this nonzero tells the compiler to use
1430    function descriptors instead.  The value of this macro says how
1431    many words wide the descriptor is (normally 2).  It is assumed
1432    that the address of a function descriptor may be treated as a
1433    pointer to a function.  */
1434 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
1435 #define TARGET_VTABLE_USES_DESCRIPTORS 0
1436 #endif
1437
1438 #endif /* GCC_INSN_FLAGS_H  */
1439
1440 #ifndef DWARF_GNAT_ENCODINGS_DEFAULT
1441 #define DWARF_GNAT_ENCODINGS_DEFAULT DWARF_GNAT_ENCODINGS_GDB
1442 #endif
1443
1444 /* When generating dwarf info, the default standard version we'll honor
1445    and advertise in absence of -gdwarf-<N> on the command line.  */
1446 #ifndef DWARF_VERSION_DEFAULT
1447 #define DWARF_VERSION_DEFAULT 5
1448 #endif
1449
1450 #ifndef USED_FOR_TARGET
1451 /* Done this way to keep gengtype happy.  */
1452 #if BITS_PER_UNIT == 8
1453 #define TARGET_UNIT uint8_t
1454 #elif BITS_PER_UNIT == 16
1455 #define TARGET_UNIT uint16_t
1456 #elif BITS_PER_UNIT == 32
1457 #define TARGET_UNIT uint32_t
1458 #else
1459 #error Unknown BITS_PER_UNIT
1460 #endif
1461 typedef TARGET_UNIT target_unit;
1462 #endif
1463
1464 #endif  /* ! GCC_DEFAULTS_H */