gcc/defaults.h

   1 /* Definitions of various defaults for tm.h macros.
   2    Copyright (C) 1992-2014 Free Software Foundation, Inc.
   3    Contributed by Ron Guilmette (rfg@monkeys.com)
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 3, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  26 #ifndef GCC_DEFAULTS_H
  27 #define GCC_DEFAULTS_H
  28
  29 /* How to start an assembler comment.  */
  30 #ifndef ASM_COMMENT_START
  31 #define ASM_COMMENT_START ";#"
  32 #endif
  33
  34 /* Store in OUTPUT a string (made with alloca) containing an
  35    assembler-name for a local static variable or function named NAME.
  36    LABELNO is an integer which is different for each call.  */
  37
  38 #ifndef ASM_PN_FORMAT
  39 # ifndef NO_DOT_IN_LABEL
  40 #  define ASM_PN_FORMAT "%s.%lu"
  41 # else
  42 #  ifndef NO_DOLLAR_IN_LABEL
  43 #   define ASM_PN_FORMAT "%s$%lu"
  44 #  else
  45 #   define ASM_PN_FORMAT "__%s_%lu"
  46 #  endif
  47 # endif
  48 #endif /* ! ASM_PN_FORMAT */
  49
  50 #ifndef ASM_FORMAT_PRIVATE_NAME
  51 # define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
  52   do { const char *const name_ = (NAME); \
  53        char *const output_ = (OUTPUT) = \
  54          (char *) alloca (strlen (name_) + 32); \
  55        sprintf (output_, ASM_PN_FORMAT, name_, (unsigned long)(LABELNO)); \
  56   } while (0)
  57 #endif
  58
  59 /* Choose a reasonable default for ASM_OUTPUT_ASCII.  */
  60
  61 #ifndef ASM_OUTPUT_ASCII
  62 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
  63   do {                                                                        \
  64     FILE *_hide_asm_out_file = (MYFILE);                                      \
  65     const unsigned char *_hide_p = (const unsigned char *) (MYSTRING);        \
  66     int _hide_thissize = (MYLENGTH);                                          \
  67     {                                                                         \
  68       FILE *asm_out_file = _hide_asm_out_file;                                \
  69       const unsigned char *p = _hide_p;                                       \
  70       int thissize = _hide_thissize;                                          \
  71       int i;                                                                  \
  72       fprintf (asm_out_file, "\t.ascii \"");                                  \
  73                                                                               \
  74       for (i = 0; i < thissize; i++)                                          \
  75         {                                                                     \
  76           int c = p[i];                                                       \
  77           if (c == '\"' || c == '\\')                                         \
  78             putc ('\\', asm_out_file);                                        \
  79           if (ISPRINT (c))                                                    \
  80             putc (c, asm_out_file);                                           \
  81           else                                                                \
  82             {                                                                 \
  83               fprintf (asm_out_file, "\\%o", c);                              \
  84               /* After an octal-escape, if a digit follows,                   \
  85                  terminate one string constant and start another.             \
  86                  The VAX assembler fails to stop reading the escape           \
  87                  after three digits, so this is the only way we               \
  88                  can get it to parse the data properly.  */                   \
  89               if (i < thissize - 1 && ISDIGIT (p[i + 1]))                     \
  90                 fprintf (asm_out_file, "\"\n\t.ascii \"");                    \
  91           }                                                                   \
  92         }                                                                     \
  93       fprintf (asm_out_file, "\"\n");                                         \
  94     }                                                                         \
  95   }                                                                           \
  96   while (0)
  97 #endif
  98
  99 /* This is how we tell the assembler to equate two values.  */
 100 #ifdef SET_ASM_OP
 101 #ifndef ASM_OUTPUT_DEF
 102 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
 103  do {   fprintf ((FILE), "%s", SET_ASM_OP);                             \
 104         assemble_name (FILE, LABEL1);                                   \
 105         fprintf (FILE, ",");                                            \
 106         assemble_name (FILE, LABEL2);                                   \
 107         fprintf (FILE, "\n");                                           \
 108   } while (0)
 109 #endif
 110 #endif
 111
 112 #ifndef IFUNC_ASM_TYPE
 113 #define IFUNC_ASM_TYPE "gnu_indirect_function"
 114 #endif
 115
 116 #ifndef TLS_COMMON_ASM_OP
 117 #define TLS_COMMON_ASM_OP ".tls_common"
 118 #endif
 119
 120 #if defined (HAVE_AS_TLS) && !defined (ASM_OUTPUT_TLS_COMMON)
 121 #define ASM_OUTPUT_TLS_COMMON(FILE, DECL, NAME, SIZE)                   \
 122   do                                                                    \
 123     {                                                                   \
 124       fprintf ((FILE), "\t%s\t", TLS_COMMON_ASM_OP);                    \
 125       assemble_name ((FILE), (NAME));                                   \
 126       fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n",          \
 127                (SIZE), DECL_ALIGN (DECL) / BITS_PER_UNIT);              \
 128     }                                                                   \
 129   while (0)
 130 #endif
 131
 132 /* Decide whether to defer emitting the assembler output for an equate
 133    of two values.  The default is to not defer output.  */
 134 #ifndef TARGET_DEFERRED_OUTPUT_DEFS
 135 #define TARGET_DEFERRED_OUTPUT_DEFS(DECL,TARGET) false
 136 #endif
 137
 138 /* This is how to output the definition of a user-level label named
 139    NAME, such as the label on variable NAME.  */
 140
 141 #ifndef ASM_OUTPUT_LABEL
 142 #define ASM_OUTPUT_LABEL(FILE,NAME) \
 143   do {                                          \
 144     assemble_name ((FILE), (NAME));             \
 145     fputs (":\n", (FILE));                      \
 146   } while (0)
 147 #endif
 148
 149 /* This is how to output the definition of a user-level label named
 150    NAME, such as the label on a function.  */
 151
 152 #ifndef ASM_OUTPUT_FUNCTION_LABEL
 153 #define ASM_OUTPUT_FUNCTION_LABEL(FILE, NAME, DECL) \
 154   ASM_OUTPUT_LABEL ((FILE), (NAME))
 155 #endif
 156
 157 /* Output the definition of a compiler-generated label named NAME.  */
 158 #ifndef ASM_OUTPUT_INTERNAL_LABEL
 159 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,NAME)    \
 160   do {                                          \
 161     assemble_name_raw ((FILE), (NAME));         \
 162     fputs (":\n", (FILE));                      \
 163   } while (0)
 164 #endif
 165
 166 /* This is how to output a reference to a user-level label named NAME.  */
 167
 168 #ifndef ASM_OUTPUT_LABELREF
 169 #define ASM_OUTPUT_LABELREF(FILE,NAME)  \
 170   do {                                                  \
 171     fputs (user_label_prefix, (FILE));                  \
 172     fputs ((NAME), (FILE));                             \
 173   } while (0);
 174 #endif
 175
 176 /* Allow target to print debug info labels specially.  This is useful for
 177    VLIW targets, since debug info labels should go into the middle of
 178    instruction bundles instead of breaking them.  */
 179
 180 #ifndef ASM_OUTPUT_DEBUG_LABEL
 181 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
 182   (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM)
 183 #endif
 184
 185 /* This is how we tell the assembler that a symbol is weak.  */
 186 #ifndef ASM_OUTPUT_WEAK_ALIAS
 187 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
 188 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE)      \
 189   do                                                    \
 190     {                                                   \
 191       ASM_WEAKEN_LABEL (STREAM, NAME);                  \
 192       if (VALUE)                                        \
 193         ASM_OUTPUT_DEF (STREAM, NAME, VALUE);           \
 194     }                                                   \
 195   while (0)
 196 #endif
 197 #endif
 198
 199 /* This is how we tell the assembler that a symbol is a weak alias to
 200    another symbol that doesn't require the other symbol to be defined.
 201    Uses of the former will turn into weak uses of the latter, i.e.,
 202    uses that, in case the latter is undefined, will not cause errors,
 203    and will add it to the symbol table as weak undefined.  However, if
 204    the latter is referenced directly, a strong reference prevails.  */
 205 #ifndef ASM_OUTPUT_WEAKREF
 206 #if defined HAVE_GAS_WEAKREF
 207 #define ASM_OUTPUT_WEAKREF(FILE, DECL, NAME, VALUE)                     \
 208   do                                                                    \
 209     {                                                                   \
 210       fprintf ((FILE), "\t.weakref\t");                                 \
 211       assemble_name ((FILE), (NAME));                                   \
 212       fprintf ((FILE), ",");                                            \
 213       assemble_name ((FILE), (VALUE));                                  \
 214       fprintf ((FILE), "\n");                                           \
 215     }                                                                   \
 216   while (0)
 217 #endif
 218 #endif
 219
 220 /* How to emit a .type directive.  */
 221 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE
 222 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT
 223 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE)   \
 224   do                                                    \
 225     {                                                   \
 226       fputs (TYPE_ASM_OP, STREAM);                      \
 227       assemble_name (STREAM, NAME);                     \
 228       fputs (", ", STREAM);                             \
 229       fprintf (STREAM, TYPE_OPERAND_FMT, TYPE);         \
 230       putc ('\n', STREAM);                              \
 231     }                                                   \
 232   while (0)
 233 #endif
 234 #endif
 235
 236 /* How to emit a .size directive.  */
 237 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE
 238 #ifdef SIZE_ASM_OP
 239 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE)   \
 240   do                                                    \
 241     {                                                   \
 242       HOST_WIDE_INT size_ = (SIZE);                     \
 243       fputs (SIZE_ASM_OP, STREAM);                      \
 244       assemble_name (STREAM, NAME);                     \
 245       fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \
 246     }                                                   \
 247   while (0)
 248
 249 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME)          \
 250   do                                                    \
 251     {                                                   \
 252       fputs (SIZE_ASM_OP, STREAM);                      \
 253       assemble_name (STREAM, NAME);                     \
 254       fputs (", .-", STREAM);                           \
 255       assemble_name (STREAM, NAME);                     \
 256       putc ('\n', STREAM);                              \
 257     }                                                   \
 258   while (0)
 259
 260 #endif
 261 #endif
 262
 263 /* This determines whether or not we support weak symbols.  SUPPORTS_WEAK
 264    must be a preprocessor constant.  */
 265 #ifndef SUPPORTS_WEAK
 266 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
 267 #define SUPPORTS_WEAK 1
 268 #else
 269 #define SUPPORTS_WEAK 0
 270 #endif
 271 #endif
 272
 273 /* This determines whether or not we support weak symbols during target
 274    code generation.  TARGET_SUPPORTS_WEAK can be any valid C expression.  */
 275 #ifndef TARGET_SUPPORTS_WEAK
 276 #define TARGET_SUPPORTS_WEAK (SUPPORTS_WEAK)
 277 #endif
 278
 279 /* This determines whether or not we support the discriminator
 280    attribute in the .loc directive.  */
 281 #ifndef SUPPORTS_DISCRIMINATOR
 282 #ifdef HAVE_GAS_DISCRIMINATOR
 283 #define SUPPORTS_DISCRIMINATOR 1
 284 #else
 285 #define SUPPORTS_DISCRIMINATOR 0
 286 #endif
 287 #endif
 288
 289 /* This determines whether or not we support link-once semantics.  */
 290 #ifndef SUPPORTS_ONE_ONLY
 291 #ifdef MAKE_DECL_ONE_ONLY
 292 #define SUPPORTS_ONE_ONLY 1
 293 #else
 294 #define SUPPORTS_ONE_ONLY 0
 295 #endif
 296 #endif
 297
 298 /* This determines whether weak symbols must be left out of a static
 299    archive's table of contents.  Defining this macro to be nonzero has
 300    the consequence that certain symbols will not be made weak that
 301    otherwise would be.  The C++ ABI requires this macro to be zero;
 302    see the documentation.  */
 303 #ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 304 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
 305 #endif
 306
 307 /* This determines whether or not we need linkonce unwind information.  */
 308 #ifndef TARGET_USES_WEAK_UNWIND_INFO
 309 #define TARGET_USES_WEAK_UNWIND_INFO 0
 310 #endif
 311
 312 /* By default, there is no prefix on user-defined symbols.  */
 313 #ifndef USER_LABEL_PREFIX
 314 #define USER_LABEL_PREFIX ""
 315 #endif
 316
 317 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
 318    provide a weak attribute.  Else define it to nothing.
 319
 320    This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
 321    not available at that time.
 322
 323    Note, this is only for use by target files which we know are to be
 324    compiled by GCC.  */
 325 #ifndef TARGET_ATTRIBUTE_WEAK
 326 # if SUPPORTS_WEAK
 327 #  define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
 328 # else
 329 #  define TARGET_ATTRIBUTE_WEAK
 330 # endif
 331 #endif
 332
 333 /* By default we can assume that all global symbols are in one namespace,
 334    across all shared libraries.  */
 335 #ifndef MULTIPLE_SYMBOL_SPACES
 336 # define MULTIPLE_SYMBOL_SPACES 0
 337 #endif
 338
 339 /* If the target supports init_priority C++ attribute, give
 340    SUPPORTS_INIT_PRIORITY a nonzero value.  */
 341 #ifndef SUPPORTS_INIT_PRIORITY
 342 #define SUPPORTS_INIT_PRIORITY 1
 343 #endif /* SUPPORTS_INIT_PRIORITY */
 344
 345 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
 346    the rest of the DWARF 2 frame unwind support is also provided.  */
 347 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
 348 #define DWARF2_UNWIND_INFO 1
 349 #endif
 350
 351 /* If we have named sections, and we're using crtstuff to run ctors,
 352    use them for registering eh frame information.  */
 353 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
 354     && !defined (EH_FRAME_IN_DATA_SECTION)
 355 #ifndef EH_FRAME_SECTION_NAME
 356 #define EH_FRAME_SECTION_NAME ".eh_frame"
 357 #endif
 358 #endif
 359
 360 /* On many systems, different EH table encodings are used under
 361    difference circumstances.  Some will require runtime relocations;
 362    some will not.  For those that do not require runtime relocations,
 363    we would like to make the table read-only.  However, since the
 364    read-only tables may need to be combined with read-write tables
 365    that do require runtime relocation, it is not safe to make the
 366    tables read-only unless the linker will merge read-only and
 367    read-write sections into a single read-write section.  If your
 368    linker does not have this ability, but your system is such that no
 369    encoding used with non-PIC code will ever require a runtime
 370    relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in
 371    your target configuration file.  */
 372 #ifndef EH_TABLES_CAN_BE_READ_ONLY
 373 #ifdef HAVE_LD_RO_RW_SECTION_MIXING
 374 #define EH_TABLES_CAN_BE_READ_ONLY 1
 375 #else
 376 #define EH_TABLES_CAN_BE_READ_ONLY 0
 377 #endif
 378 #endif
 379
 380 /* If we have named section and we support weak symbols, then use the
 381    .jcr section for recording java classes which need to be registered
 382    at program start-up time.  */
 383 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
 384 #ifndef JCR_SECTION_NAME
 385 #define JCR_SECTION_NAME ".jcr"
 386 #endif
 387 #endif
 388
 389 /* This decision to use a .jcr section can be overridden by defining
 390    USE_JCR_SECTION to 0 in target file.  This is necessary if target
 391    can define JCR_SECTION_NAME but does not have crtstuff or
 392    linker support for .jcr section.  */
 393 #ifndef TARGET_USE_JCR_SECTION
 394 #ifdef JCR_SECTION_NAME
 395 #define TARGET_USE_JCR_SECTION 1
 396 #else
 397 #define TARGET_USE_JCR_SECTION 0
 398 #endif
 399 #endif
 400
 401 /* Number of hardware registers that go into the DWARF-2 unwind info.
 402    If not defined, equals FIRST_PSEUDO_REGISTER  */
 403
 404 #ifndef DWARF_FRAME_REGISTERS
 405 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
 406 #endif
 407
 408 /* Offsets recorded in opcodes are a multiple of this alignment factor.  */
 409 #ifndef DWARF_CIE_DATA_ALIGNMENT
 410 #ifdef STACK_GROWS_DOWNWARD
 411 #define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD))
 412 #else
 413 #define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD)
 414 #endif
 415 #endif
 416
 417 /* The DWARF 2 CFA column which tracks the return address.  Normally this
 418    is the column for PC, or the first column after all of the hard
 419    registers.  */
 420 #ifndef DWARF_FRAME_RETURN_COLUMN
 421 #ifdef PC_REGNUM
 422 #define DWARF_FRAME_RETURN_COLUMN       DWARF_FRAME_REGNUM (PC_REGNUM)
 423 #else
 424 #define DWARF_FRAME_RETURN_COLUMN       DWARF_FRAME_REGISTERS
 425 #endif
 426 #endif
 427
 428 /* How to renumber registers for dbx and gdb.  If not defined, assume
 429    no renumbering is necessary.  */
 430
 431 #ifndef DBX_REGISTER_NUMBER
 432 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 433 #endif
 434
 435 /* The mapping from gcc register number to DWARF 2 CFA column number.
 436    By default, we just provide columns for all registers.  */
 437 #ifndef DWARF_FRAME_REGNUM
 438 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
 439 #endif
 440
 441 /* Map register numbers held in the call frame info that gcc has
 442    collected using DWARF_FRAME_REGNUM to those that should be output in
 443    .debug_frame and .eh_frame.  */
 444 #ifndef DWARF2_FRAME_REG_OUT
 445 #define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) (REGNO)
 446 #endif
 447
 448 /* The size of addresses as they appear in the Dwarf 2 data.
 449    Some architectures use word addresses to refer to code locations,
 450    but Dwarf 2 info always uses byte addresses.  On such machines,
 451    Dwarf 2 addresses need to be larger than the architecture's
 452    pointers.  */
 453 #ifndef DWARF2_ADDR_SIZE
 454 #define DWARF2_ADDR_SIZE ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)
 455 #endif
 456
 457 /* The size in bytes of a DWARF field indicating an offset or length
 458    relative to a debug info section, specified to be 4 bytes in the
 459    DWARF-2 specification.  The SGI/MIPS ABI defines it to be the same
 460    as PTR_SIZE.  */
 461 #ifndef DWARF_OFFSET_SIZE
 462 #define DWARF_OFFSET_SIZE 4
 463 #endif
 464
 465 /* The size in bytes of a DWARF 4 type signature.  */
 466 #ifndef DWARF_TYPE_SIGNATURE_SIZE
 467 #define DWARF_TYPE_SIGNATURE_SIZE 8
 468 #endif
 469
 470 /* Default sizes for base C types.  If the sizes are different for
 471    your target, you should override these values by defining the
 472    appropriate symbols in your tm.h file.  */
 473
 474 #if BITS_PER_UNIT == 8
 475 #define LOG2_BITS_PER_UNIT 3
 476 #elif BITS_PER_UNIT == 16
 477 #define LOG2_BITS_PER_UNIT 4
 478 #else
 479 #error Unknown BITS_PER_UNIT
 480 #endif
 481
 482 #ifndef BITS_PER_WORD
 483 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
 484 #endif
 485
 486 #ifndef CHAR_TYPE_SIZE
 487 #define CHAR_TYPE_SIZE BITS_PER_UNIT
 488 #endif
 489
 490 #ifndef BOOL_TYPE_SIZE
 491 /* `bool' has size and alignment `1', on almost all platforms.  */
 492 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
 493 #endif
 494
 495 #ifndef SHORT_TYPE_SIZE
 496 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
 497 #endif
 498
 499 #ifndef INT_TYPE_SIZE
 500 #define INT_TYPE_SIZE BITS_PER_WORD
 501 #endif
 502
 503 #ifndef LONG_TYPE_SIZE
 504 #define LONG_TYPE_SIZE BITS_PER_WORD
 505 #endif
 506
 507 #ifndef LONG_LONG_TYPE_SIZE
 508 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
 509 #endif
 510
 511 #ifndef WCHAR_TYPE_SIZE
 512 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
 513 #endif
 514
 515 #ifndef FLOAT_TYPE_SIZE
 516 #define FLOAT_TYPE_SIZE BITS_PER_WORD
 517 #endif
 518
 519 #ifndef DOUBLE_TYPE_SIZE
 520 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 521 #endif
 522
 523 #ifndef LONG_DOUBLE_TYPE_SIZE
 524 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 525 #endif
 526
 527 #ifndef DECIMAL32_TYPE_SIZE
 528 #define DECIMAL32_TYPE_SIZE 32
 529 #endif
 530
 531 #ifndef DECIMAL64_TYPE_SIZE
 532 #define DECIMAL64_TYPE_SIZE 64
 533 #endif
 534
 535 #ifndef DECIMAL128_TYPE_SIZE
 536 #define DECIMAL128_TYPE_SIZE 128
 537 #endif
 538
 539 #ifndef SHORT_FRACT_TYPE_SIZE
 540 #define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT
 541 #endif
 542
 543 #ifndef FRACT_TYPE_SIZE
 544 #define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2)
 545 #endif
 546
 547 #ifndef LONG_FRACT_TYPE_SIZE
 548 #define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4)
 549 #endif
 550
 551 #ifndef LONG_LONG_FRACT_TYPE_SIZE
 552 #define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8)
 553 #endif
 554
 555 #ifndef SHORT_ACCUM_TYPE_SIZE
 556 #define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2)
 557 #endif
 558
 559 #ifndef ACCUM_TYPE_SIZE
 560 #define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2)
 561 #endif
 562
 563 #ifndef LONG_ACCUM_TYPE_SIZE
 564 #define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2)
 565 #endif
 566
 567 #ifndef LONG_LONG_ACCUM_TYPE_SIZE
 568 #define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2)
 569 #endif
 570
 571 /* We let tm.h override the types used here, to handle trivial differences
 572    such as the choice of unsigned int or long unsigned int for size_t.
 573    When machines start needing nontrivial differences in the size type,
 574    it would be best to do something here to figure out automatically
 575    from other information what type to use.  */
 576
 577 #ifndef SIZE_TYPE
 578 #define SIZE_TYPE "long unsigned int"
 579 #endif
 580
 581 #ifndef SIZETYPE
 582 #define SIZETYPE SIZE_TYPE
 583 #endif
 584
 585 #ifndef PID_TYPE
 586 #define PID_TYPE "int"
 587 #endif
 588
 589 /* If GCC knows the exact uint_least16_t and uint_least32_t types from
 590    <stdint.h>, use them for char16_t and char32_t.  Otherwise, use
 591    these guesses; getting the wrong type of a given width will not
 592    affect C++ name mangling because in C++ these are distinct types
 593    not typedefs.  */
 594
 595 #ifdef UINT_LEAST16_TYPE
 596 #define CHAR16_TYPE UINT_LEAST16_TYPE
 597 #else
 598 #define CHAR16_TYPE "short unsigned int"
 599 #endif
 600
 601 #ifdef UINT_LEAST32_TYPE
 602 #define CHAR32_TYPE UINT_LEAST32_TYPE
 603 #else
 604 #define CHAR32_TYPE "unsigned int"
 605 #endif
 606
 607 #ifndef WCHAR_TYPE
 608 #define WCHAR_TYPE "int"
 609 #endif
 610
 611 /* WCHAR_TYPE gets overridden by -fshort-wchar.  */
 612 #define MODIFIED_WCHAR_TYPE \
 613         (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE)
 614
 615 #ifndef PTRDIFF_TYPE
 616 #define PTRDIFF_TYPE "long int"
 617 #endif
 618
 619 #ifndef WINT_TYPE
 620 #define WINT_TYPE "unsigned int"
 621 #endif
 622
 623 #ifndef INTMAX_TYPE
 624 #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)     \
 625                      ? "int"                                    \
 626                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 627                         ? "long int"                            \
 628                         : "long long int"))
 629 #endif
 630
 631 #ifndef UINTMAX_TYPE
 632 #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)    \
 633                      ? "unsigned int"                           \
 634                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 635                         ? "long unsigned int"                   \
 636                         : "long long unsigned int"))
 637 #endif
 638
 639
 640 /* There are no default definitions of these <stdint.h> types.  */
 641
 642 #ifndef SIG_ATOMIC_TYPE
 643 #define SIG_ATOMIC_TYPE ((const char *) NULL)
 644 #endif
 645
 646 #ifndef INT8_TYPE
 647 #define INT8_TYPE ((const char *) NULL)
 648 #endif
 649
 650 #ifndef INT16_TYPE
 651 #define INT16_TYPE ((const char *) NULL)
 652 #endif
 653
 654 #ifndef INT32_TYPE
 655 #define INT32_TYPE ((const char *) NULL)
 656 #endif
 657
 658 #ifndef INT64_TYPE
 659 #define INT64_TYPE ((const char *) NULL)
 660 #endif
 661
 662 #ifndef UINT8_TYPE
 663 #define UINT8_TYPE ((const char *) NULL)
 664 #endif
 665
 666 #ifndef UINT16_TYPE
 667 #define UINT16_TYPE ((const char *) NULL)
 668 #endif
 669
 670 #ifndef UINT32_TYPE
 671 #define UINT32_TYPE ((const char *) NULL)
 672 #endif
 673
 674 #ifndef UINT64_TYPE
 675 #define UINT64_TYPE ((const char *) NULL)
 676 #endif
 677
 678 #ifndef INT_LEAST8_TYPE
 679 #define INT_LEAST8_TYPE ((const char *) NULL)
 680 #endif
 681
 682 #ifndef INT_LEAST16_TYPE
 683 #define INT_LEAST16_TYPE ((const char *) NULL)
 684 #endif
 685
 686 #ifndef INT_LEAST32_TYPE
 687 #define INT_LEAST32_TYPE ((const char *) NULL)
 688 #endif
 689
 690 #ifndef INT_LEAST64_TYPE
 691 #define INT_LEAST64_TYPE ((const char *) NULL)
 692 #endif
 693
 694 #ifndef UINT_LEAST8_TYPE
 695 #define UINT_LEAST8_TYPE ((const char *) NULL)
 696 #endif
 697
 698 #ifndef UINT_LEAST16_TYPE
 699 #define UINT_LEAST16_TYPE ((const char *) NULL)
 700 #endif
 701
 702 #ifndef UINT_LEAST32_TYPE
 703 #define UINT_LEAST32_TYPE ((const char *) NULL)
 704 #endif
 705
 706 #ifndef UINT_LEAST64_TYPE
 707 #define UINT_LEAST64_TYPE ((const char *) NULL)
 708 #endif
 709
 710 #ifndef INT_FAST8_TYPE
 711 #define INT_FAST8_TYPE ((const char *) NULL)
 712 #endif
 713
 714 #ifndef INT_FAST16_TYPE
 715 #define INT_FAST16_TYPE ((const char *) NULL)
 716 #endif
 717
 718 #ifndef INT_FAST32_TYPE
 719 #define INT_FAST32_TYPE ((const char *) NULL)
 720 #endif
 721
 722 #ifndef INT_FAST64_TYPE
 723 #define INT_FAST64_TYPE ((const char *) NULL)
 724 #endif
 725
 726 #ifndef UINT_FAST8_TYPE
 727 #define UINT_FAST8_TYPE ((const char *) NULL)
 728 #endif
 729
 730 #ifndef UINT_FAST16_TYPE
 731 #define UINT_FAST16_TYPE ((const char *) NULL)
 732 #endif
 733
 734 #ifndef UINT_FAST32_TYPE
 735 #define UINT_FAST32_TYPE ((const char *) NULL)
 736 #endif
 737
 738 #ifndef UINT_FAST64_TYPE
 739 #define UINT_FAST64_TYPE ((const char *) NULL)
 740 #endif
 741
 742 #ifndef INTPTR_TYPE
 743 #define INTPTR_TYPE ((const char *) NULL)
 744 #endif
 745
 746 #ifndef UINTPTR_TYPE
 747 #define UINTPTR_TYPE ((const char *) NULL)
 748 #endif
 749
 750 /* Width in bits of a pointer.  Mind the value of the macro `Pmode'.  */
 751 #ifndef POINTER_SIZE
 752 #define POINTER_SIZE BITS_PER_WORD
 753 #endif
 754 #ifndef POINTER_SIZE_UNITS
 755 #define POINTER_SIZE_UNITS ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)
 756 #endif
 757
 758
 759 #ifndef PIC_OFFSET_TABLE_REGNUM
 760 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
 761 #endif
 762
 763 #ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
 764 #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 0
 765 #endif
 766
 767 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
 768 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
 769 #endif
 770
 771 #ifndef TARGET_DECLSPEC
 772 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
 773 /* If the target supports the "dllimport" attribute, users are
 774    probably used to the "__declspec" syntax.  */
 775 #define TARGET_DECLSPEC 1
 776 #else
 777 #define TARGET_DECLSPEC 0
 778 #endif
 779 #endif
 780
 781 /* By default, the preprocessor should be invoked the same way in C++
 782    as in C.  */
 783 #ifndef CPLUSPLUS_CPP_SPEC
 784 #ifdef CPP_SPEC
 785 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
 786 #endif
 787 #endif
 788
 789 #ifndef ACCUMULATE_OUTGOING_ARGS
 790 #define ACCUMULATE_OUTGOING_ARGS 0
 791 #endif
 792
 793 /* By default, use the GNU runtime for Objective C.  */
 794 #ifndef NEXT_OBJC_RUNTIME
 795 #define NEXT_OBJC_RUNTIME 0
 796 #endif
 797
 798 /* Supply a default definition for PUSH_ARGS.  */
 799 #ifndef PUSH_ARGS
 800 #ifdef PUSH_ROUNDING
 801 #define PUSH_ARGS       !ACCUMULATE_OUTGOING_ARGS
 802 #else
 803 #define PUSH_ARGS       0
 804 #endif
 805 #endif
 806
 807 /* Decide whether a function's arguments should be processed
 808    from first to last or from last to first.
 809
 810    They should if the stack and args grow in opposite directions, but
 811    only if we have push insns.  */
 812
 813 #ifdef PUSH_ROUNDING
 814
 815 #ifndef PUSH_ARGS_REVERSED
 816 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
 817 #define PUSH_ARGS_REVERSED  PUSH_ARGS
 818 #endif
 819 #endif
 820
 821 #endif
 822
 823 #ifndef PUSH_ARGS_REVERSED
 824 #define PUSH_ARGS_REVERSED 0
 825 #endif
 826
 827 /* Default value for the alignment (in bits) a C conformant malloc has to
 828    provide. This default is intended to be safe and always correct.  */
 829 #ifndef MALLOC_ABI_ALIGNMENT
 830 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
 831 #endif
 832
 833 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
 834    STACK_BOUNDARY is required.  */
 835 #ifndef PREFERRED_STACK_BOUNDARY
 836 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
 837 #endif
 838
 839 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not
 840    defined.  */
 841 #ifndef INCOMING_STACK_BOUNDARY
 842 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY
 843 #endif
 844
 845 #ifndef TARGET_DEFAULT_PACK_STRUCT
 846 #define TARGET_DEFAULT_PACK_STRUCT 0
 847 #endif
 848
 849 /* By default, the vtable entries are void pointers, the so the alignment
 850    is the same as pointer alignment.  The value of this macro specifies
 851    the alignment of the vtable entry in bits.  It should be defined only
 852    when special alignment is necessary.  */
 853 #ifndef TARGET_VTABLE_ENTRY_ALIGN
 854 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
 855 #endif
 856
 857 /* There are a few non-descriptor entries in the vtable at offsets below
 858    zero.  If these entries must be padded (say, to preserve the alignment
 859    specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
 860    words in each data entry.  */
 861 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
 862 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
 863 #endif
 864
 865 /* Decide whether it is safe to use a local alias for a virtual function
 866    when constructing thunks.  */
 867 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
 868 #ifdef ASM_OUTPUT_DEF
 869 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
 870 #else
 871 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
 872 #endif
 873 #endif
 874
 875 /* Select a format to encode pointers in exception handling data.  We
 876    prefer those that result in fewer dynamic relocations.  Assume no
 877    special support here and encode direct references.  */
 878 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
 879 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  DW_EH_PE_absptr
 880 #endif
 881
 882 /* By default, the C++ compiler will use the lowest bit of the pointer
 883    to function to indicate a pointer-to-member-function points to a
 884    virtual member function.  However, if FUNCTION_BOUNDARY indicates
 885    function addresses aren't always even, the lowest bit of the delta
 886    field will be used.  */
 887 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
 888 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
 889   (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
 890    ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
 891 #endif
 892
 893 #ifndef DEFAULT_GDB_EXTENSIONS
 894 #define DEFAULT_GDB_EXTENSIONS 1
 895 #endif
 896
 897 /* If more than one debugging type is supported, you must define
 898    PREFERRED_DEBUGGING_TYPE to choose the default.  */
 899
 900 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
 901          + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
 902          + defined (VMS_DEBUGGING_INFO))
 903 #ifndef PREFERRED_DEBUGGING_TYPE
 904 #error You must define PREFERRED_DEBUGGING_TYPE
 905 #endif /* no PREFERRED_DEBUGGING_TYPE */
 906
 907 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
 908    here so other code needn't care.  */
 909 #elif defined DBX_DEBUGGING_INFO
 910 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 911
 912 #elif defined SDB_DEBUGGING_INFO
 913 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
 914
 915 #elif defined DWARF2_DEBUGGING_INFO
 916 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 917
 918 #elif defined VMS_DEBUGGING_INFO
 919 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
 920
 921 #elif defined XCOFF_DEBUGGING_INFO
 922 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
 923
 924 #else
 925 /* No debugging format is supported by this target.  */
 926 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
 927 #endif
 928
 929 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
 930 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
 931 #endif
 932
 933 /* True if the targets integer-comparison functions return { 0, 1, 2
 934    } to indicate { <, ==, > }.  False if { -1, 0, 1 } is used
 935    instead.  The libgcc routines are biased.  */
 936 #ifndef TARGET_LIB_INT_CMP_BIASED
 937 #define TARGET_LIB_INT_CMP_BIASED (true)
 938 #endif
 939
 940 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
 941    then the word-endianness is the same as for integers.  */
 942 #ifndef FLOAT_WORDS_BIG_ENDIAN
 943 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 944 #endif
 945
 946 #ifndef REG_WORDS_BIG_ENDIAN
 947 #define REG_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 948 #endif
 949
 950 #ifdef TARGET_FLT_EVAL_METHOD
 951 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 1
 952 #else
 953 #define TARGET_FLT_EVAL_METHOD 0
 954 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 0
 955 #endif
 956
 957 #ifndef TARGET_DEC_EVAL_METHOD
 958 #define TARGET_DEC_EVAL_METHOD 2
 959 #endif
 960
 961 #ifndef HAS_LONG_COND_BRANCH
 962 #define HAS_LONG_COND_BRANCH 0
 963 #endif
 964
 965 #ifndef HAS_LONG_UNCOND_BRANCH
 966 #define HAS_LONG_UNCOND_BRANCH 0
 967 #endif
 968
 969 /* Determine whether __cxa_atexit, rather than atexit, is used to
 970    register C++ destructors for local statics and global objects.  */
 971 #ifndef DEFAULT_USE_CXA_ATEXIT
 972 #define DEFAULT_USE_CXA_ATEXIT 0
 973 #endif
 974
 975 #if GCC_VERSION >= 3000 && defined IN_GCC
 976 /* These old constraint macros shouldn't appear anywhere in a
 977    configuration using MD constraint definitions.  */
 978 #endif
 979
 980 /* Determin whether the target runtime library is Bionic */
 981 #ifndef TARGET_HAS_BIONIC
 982 #define TARGET_HAS_BIONIC 0
 983 #endif
 984
 985 /* Indicate that CLZ and CTZ are undefined at zero.  */
 986 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
 987 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
 988 #endif
 989 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
 990 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
 991 #endif
 992
 993 /* Provide a default value for STORE_FLAG_VALUE.  */
 994 #ifndef STORE_FLAG_VALUE
 995 #define STORE_FLAG_VALUE  1
 996 #endif
 997
 998 /* This macro is used to determine what the largest unit size that
 999    move_by_pieces can use is.  */
1000
1001 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
1002    move efficiently, as opposed to  MOVE_MAX which is the maximum
1003    number of bytes we can move with a single instruction.  */
1004
1005 #ifndef MOVE_MAX_PIECES
1006 #define MOVE_MAX_PIECES   MOVE_MAX
1007 #endif
1008
1009 #ifndef MAX_MOVE_MAX
1010 #define MAX_MOVE_MAX MOVE_MAX
1011 #endif
1012
1013 #ifndef MIN_UNITS_PER_WORD
1014 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
1015 #endif
1016
1017 #ifndef MAX_BITS_PER_WORD
1018 #define MAX_BITS_PER_WORD BITS_PER_WORD
1019 #endif
1020
1021 #ifndef STACK_POINTER_OFFSET
1022 #define STACK_POINTER_OFFSET    0
1023 #endif
1024
1025 #ifndef LOCAL_REGNO
1026 #define LOCAL_REGNO(REGNO)  0
1027 #endif
1028
1029 #ifndef HONOR_REG_ALLOC_ORDER
1030 #define HONOR_REG_ALLOC_ORDER 0
1031 #endif
1032
1033 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1034    the stack pointer does not matter.  The value is tested only in
1035    functions that have frame pointers.  */
1036 #ifndef EXIT_IGNORE_STACK
1037 #define EXIT_IGNORE_STACK 0
1038 #endif
1039
1040 /* Assume that case vectors are not pc-relative.  */
1041 #ifndef CASE_VECTOR_PC_RELATIVE
1042 #define CASE_VECTOR_PC_RELATIVE 0
1043 #endif
1044
1045 /* Assume that trampolines need function alignment.  */
1046 #ifndef TRAMPOLINE_ALIGNMENT
1047 #define TRAMPOLINE_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 /* On most machines, the CFA coincides with the first incoming parm.  */
1085 #ifndef ARG_POINTER_CFA_OFFSET
1086 #define ARG_POINTER_CFA_OFFSET(FNDECL) \
1087   (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
1088 #endif
1089
1090 /* On most machines, we use the CFA as DW_AT_frame_base.  */
1091 #ifndef CFA_FRAME_BASE_OFFSET
1092 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0
1093 #endif
1094
1095 /* The offset from the incoming value of %sp to the top of the stack frame
1096    for the current function.  */
1097 #ifndef INCOMING_FRAME_SP_OFFSET
1098 #define INCOMING_FRAME_SP_OFFSET 0
1099 #endif
1100
1101 #ifndef HARD_REGNO_NREGS_HAS_PADDING
1102 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
1103 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
1104 #endif
1105
1106 #ifndef OUTGOING_REG_PARM_STACK_SPACE
1107 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
1108 #endif
1109
1110 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
1111    the backend.  MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
1112    effort stack alignment supported by the backend.  If the backend
1113    supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
1114    MAX_STACK_ALIGNMENT are the same.  Otherwise, the incoming stack
1115    boundary will limit the maximum guaranteed stack alignment.  */
1116 #ifdef MAX_STACK_ALIGNMENT
1117 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
1118 #else
1119 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY
1120 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
1121 #endif
1122
1123 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
1124
1125 #ifndef LOCAL_ALIGNMENT
1126 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
1127 #endif
1128
1129 #ifndef STACK_SLOT_ALIGNMENT
1130 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
1131   ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
1132 #endif
1133
1134 #ifndef LOCAL_DECL_ALIGNMENT
1135 #define LOCAL_DECL_ALIGNMENT(DECL) \
1136   LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
1137 #endif
1138
1139 #ifndef MINIMUM_ALIGNMENT
1140 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN)
1141 #endif
1142
1143 /* Alignment value for attribute ((aligned)).  */
1144 #ifndef ATTRIBUTE_ALIGNED_VALUE
1145 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
1146 #endif
1147
1148 #ifndef SLOW_UNALIGNED_ACCESS
1149 #define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) STRICT_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 #ifdef GCC_INSN_FLAGS_H
1172 /* Dependent default target macro definitions
1173
1174    This section of defaults.h defines target macros that depend on generated
1175    headers.  This is a bit awkward:  We want to put all default definitions
1176    for target macros in defaults.h, but some of the defaults depend on the
1177    HAVE_* flags defines of insn-flags.h.  But insn-flags.h is not always
1178    included by files that do include defaults.h.
1179
1180    Fortunately, the default macro definitions that depend on the HAVE_*
1181    macros are also the ones that will only be used inside GCC itself, i.e.
1182    not in the gen* programs or in target objects like libgcc.
1183
1184    Obviously, it would be best to keep this section of defaults.h as small
1185    as possible, by converting the macros defined below to target hooks or
1186    functions.
1187 */
1188
1189 /* The default branch cost is 1.  */
1190 #ifndef BRANCH_COST
1191 #define BRANCH_COST(speed_p, predictable_p) 1
1192 #endif
1193
1194 /* If a memory-to-memory move would take MOVE_RATIO or more simple
1195    move-instruction sequences, we will do a movmem or libcall instead.  */
1196
1197 #ifndef MOVE_RATIO
1198 #if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti)
1199 #define MOVE_RATIO(speed) 2
1200 #else
1201 /* If we are optimizing for space (-Os), cut down the default move ratio.  */
1202 #define MOVE_RATIO(speed) ((speed) ? 15 : 3)
1203 #endif
1204 #endif
1205
1206 /* If a clear memory operation would take CLEAR_RATIO or more simple
1207    move-instruction sequences, we will do a setmem or libcall instead.  */
1208
1209 #ifndef CLEAR_RATIO
1210 #if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
1211 #define CLEAR_RATIO(speed) 2
1212 #else
1213 /* If we are optimizing for space, cut down the default clear ratio.  */
1214 #define CLEAR_RATIO(speed) ((speed) ? 15 :3)
1215 #endif
1216 #endif
1217
1218 /* If a memory set (to value other than zero) operation would take
1219    SET_RATIO or more simple move-instruction sequences, we will do a movmem
1220    or libcall instead.  */
1221 #ifndef SET_RATIO
1222 #define SET_RATIO(speed) MOVE_RATIO (speed)
1223 #endif
1224
1225 /* Supply a default definition for FUNCTION_ARG_PADDING:
1226    usually pad upward, but pad short args downward on
1227    big-endian machines.  */
1228
1229 #define DEFAULT_FUNCTION_ARG_PADDING(MODE, TYPE)                        \
1230   (! BYTES_BIG_ENDIAN                                                   \
1231    ? upward                                                             \
1232    : (((MODE) == BLKmode                                                \
1233        ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST         \
1234           && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \
1235        : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY)                       \
1236       ? downward : upward))
1237
1238 #ifndef FUNCTION_ARG_PADDING
1239 #define FUNCTION_ARG_PADDING(MODE, TYPE)        \
1240   DEFAULT_FUNCTION_ARG_PADDING ((MODE), (TYPE))
1241 #endif
1242
1243 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
1244    Normally move_insn, so Pmode stack pointer.  */
1245
1246 #ifndef STACK_SAVEAREA_MODE
1247 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
1248 #endif
1249
1250 /* Supply a default definition of STACK_SIZE_MODE for
1251    allocate_dynamic_stack_space.  Normally PLUS/MINUS, so word_mode.  */
1252
1253 #ifndef STACK_SIZE_MODE
1254 #define STACK_SIZE_MODE word_mode
1255 #endif
1256
1257 /* Provide default values for the macros controlling stack checking.  */
1258
1259 /* The default is neither full builtin stack checking...  */
1260 #ifndef STACK_CHECK_BUILTIN
1261 #define STACK_CHECK_BUILTIN 0
1262 #endif
1263
1264 /* ...nor static builtin stack checking.  */
1265 #ifndef STACK_CHECK_STATIC_BUILTIN
1266 #define STACK_CHECK_STATIC_BUILTIN 0
1267 #endif
1268
1269 /* The default interval is one page (4096 bytes).  */
1270 #ifndef STACK_CHECK_PROBE_INTERVAL_EXP
1271 #define STACK_CHECK_PROBE_INTERVAL_EXP 12
1272 #endif
1273
1274 /* The default is not to move the stack pointer.  */
1275 #ifndef STACK_CHECK_MOVING_SP
1276 #define STACK_CHECK_MOVING_SP 0
1277 #endif
1278
1279 /* This is a kludge to try to capture the discrepancy between the old
1280    mechanism (generic stack checking) and the new mechanism (static
1281    builtin stack checking).  STACK_CHECK_PROTECT needs to be bumped
1282    for the latter because part of the protection area is effectively
1283    included in STACK_CHECK_MAX_FRAME_SIZE for the former.  */
1284 #ifdef STACK_CHECK_PROTECT
1285 #define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
1286 #else
1287 #define STACK_OLD_CHECK_PROTECT                                         \
1288  (targetm_common.except_unwind_info (&global_options) == UI_SJLJ        \
1289   ? 75 * UNITS_PER_WORD                                                 \
1290   : 8 * 1024)
1291 #endif
1292
1293 /* Minimum amount of stack required to recover from an anticipated stack
1294    overflow detection.  The default value conveys an estimate of the amount
1295    of stack required to propagate an exception.  */
1296 #ifndef STACK_CHECK_PROTECT
1297 #define STACK_CHECK_PROTECT                                             \
1298  (targetm_common.except_unwind_info (&global_options) == UI_SJLJ        \
1299   ? 75 * UNITS_PER_WORD                                                 \
1300   : 12 * 1024)
1301 #endif
1302
1303 /* Make the maximum frame size be the largest we can and still only need
1304    one probe per function.  */
1305 #ifndef STACK_CHECK_MAX_FRAME_SIZE
1306 #define STACK_CHECK_MAX_FRAME_SIZE \
1307   ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD)
1308 #endif
1309
1310 /* This is arbitrary, but should be large enough everywhere.  */
1311 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
1312 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
1313 #endif
1314
1315 /* Provide a reasonable default for the maximum size of an object to
1316    allocate in the fixed frame.  We may need to be able to make this
1317    controllable by the user at some point.  */
1318 #ifndef STACK_CHECK_MAX_VAR_SIZE
1319 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
1320 #endif
1321
1322 /* By default, the C++ compiler will use function addresses in the
1323    vtable entries.  Setting this nonzero tells the compiler to use
1324    function descriptors instead.  The value of this macro says how
1325    many words wide the descriptor is (normally 2).  It is assumed
1326    that the address of a function descriptor may be treated as a
1327    pointer to a function.  */
1328 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
1329 #define TARGET_VTABLE_USES_DESCRIPTORS 0
1330 #endif
1331
1332 #ifndef SWITCHABLE_TARGET
1333 #define SWITCHABLE_TARGET 0
1334 #endif
1335
1336 /* If the target supports integers that are wider than two
1337    HOST_WIDE_INTs on the host compiler, then the target should define
1338    TARGET_SUPPORTS_WIDE_INT and make the appropriate fixups.
1339    Otherwise the compiler really is not robust.  */
1340 #ifndef TARGET_SUPPORTS_WIDE_INT
1341 #define TARGET_SUPPORTS_WIDE_INT 0
1342 #endif
1343
1344 #endif /* GCC_INSN_FLAGS_H  */
1345
1346 #endif  /* ! GCC_DEFAULTS_H */