gcc/defaults.h

   1 /* Definitions of various defaults for tm.h macros.
   2    Copyright (C) 1992, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
   3    2005, 2007, 2008, 2009, 2010, 2011
   4    Free Software Foundation, Inc.
   5    Contributed by Ron Guilmette (rfg@monkeys.com)
   6
   7 This file is part of GCC.
   8
   9 GCC is free software; you can redistribute it and/or modify it under
  10 the terms of the GNU General Public License as published by the Free
  11 Software Foundation; either version 3, or (at your option) any later
  12 version.
  13
  14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  17 for more details.
  18
  19 Under Section 7 of GPL version 3, you are granted additional
  20 permissions described in the GCC Runtime Library Exception, version
  21 3.1, as published by the Free Software Foundation.
  22
  23 You should have received a copy of the GNU General Public License and
  24 a copy of the GCC Runtime Library Exception along with this program;
  25 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  26 <http://www.gnu.org/licenses/>.  */
  27
  28 #ifndef GCC_DEFAULTS_H
  29 #define GCC_DEFAULTS_H
  30
  31 /* How to start an assembler comment.  */
  32 #ifndef ASM_COMMENT_START
  33 #define ASM_COMMENT_START ";#"
  34 #endif
  35
  36 /* Store in OUTPUT a string (made with alloca) containing an
  37    assembler-name for a local static variable or function named NAME.
  38    LABELNO is an integer which is different for each call.  */
  39
  40 #ifndef ASM_PN_FORMAT
  41 # ifndef NO_DOT_IN_LABEL
  42 #  define ASM_PN_FORMAT "%s.%lu"
  43 # else
  44 #  ifndef NO_DOLLAR_IN_LABEL
  45 #   define ASM_PN_FORMAT "%s$%lu"
  46 #  else
  47 #   define ASM_PN_FORMAT "__%s_%lu"
  48 #  endif
  49 # endif
  50 #endif /* ! ASM_PN_FORMAT */
  51
  52 #ifndef ASM_FORMAT_PRIVATE_NAME
  53 # define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
  54   do { const char *const name_ = (NAME); \
  55        char *const output_ = (OUTPUT) = \
  56          (char *) alloca (strlen (name_) + 32); \
  57        sprintf (output_, ASM_PN_FORMAT, name_, (unsigned long)(LABELNO)); \
  58   } while (0)
  59 #endif
  60
  61 /* Choose a reasonable default for ASM_OUTPUT_ASCII.  */
  62
  63 #ifndef ASM_OUTPUT_ASCII
  64 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
  65   do {                                                                        \
  66     FILE *_hide_asm_out_file = (MYFILE);                                      \
  67     const unsigned char *_hide_p = (const unsigned char *) (MYSTRING);        \
  68     int _hide_thissize = (MYLENGTH);                                          \
  69     {                                                                         \
  70       FILE *asm_out_file = _hide_asm_out_file;                                \
  71       const unsigned char *p = _hide_p;                                       \
  72       int thissize = _hide_thissize;                                          \
  73       int i;                                                                  \
  74       fprintf (asm_out_file, "\t.ascii \"");                                  \
  75                                                                               \
  76       for (i = 0; i < thissize; i++)                                          \
  77         {                                                                     \
  78           int c = p[i];                                                       \
  79           if (c == '\"' || c == '\\')                                         \
  80             putc ('\\', asm_out_file);                                        \
  81           if (ISPRINT(c))                                                     \
  82             putc (c, asm_out_file);                                           \
  83           else                                                                \
  84             {                                                                 \
  85               fprintf (asm_out_file, "\\%o", c);                              \
  86               /* After an octal-escape, if a digit follows,                   \
  87                  terminate one string constant and start another.             \
  88                  The VAX assembler fails to stop reading the escape           \
  89                  after three digits, so this is the only way we               \
  90                  can get it to parse the data properly.  */                   \
  91               if (i < thissize - 1 && ISDIGIT(p[i + 1]))                      \
  92                 fprintf (asm_out_file, "\"\n\t.ascii \"");                    \
  93           }                                                                   \
  94         }                                                                     \
  95       fprintf (asm_out_file, "\"\n");                                         \
  96     }                                                                         \
  97   }                                                                           \
  98   while (0)
  99 #endif
 100
 101 /* This is how we tell the assembler to equate two values.  */
 102 #ifdef SET_ASM_OP
 103 #ifndef ASM_OUTPUT_DEF
 104 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
 105  do {   fprintf ((FILE), "%s", SET_ASM_OP);                             \
 106         assemble_name (FILE, LABEL1);                                   \
 107         fprintf (FILE, ",");                                            \
 108         assemble_name (FILE, LABEL2);                                   \
 109         fprintf (FILE, "\n");                                           \
 110   } while (0)
 111 #endif
 112 #endif
 113
 114 #ifndef IFUNC_ASM_TYPE
 115 #define IFUNC_ASM_TYPE "gnu_indirect_function"
 116 #endif
 117
 118 #ifndef TLS_COMMON_ASM_OP
 119 #define TLS_COMMON_ASM_OP ".tls_common"
 120 #endif
 121
 122 #if defined (HAVE_AS_TLS) && !defined (ASM_OUTPUT_TLS_COMMON)
 123 #define ASM_OUTPUT_TLS_COMMON(FILE, DECL, NAME, SIZE)                   \
 124   do                                                                    \
 125     {                                                                   \
 126       fprintf ((FILE), "\t%s\t", TLS_COMMON_ASM_OP);                    \
 127       assemble_name ((FILE), (NAME));                                   \
 128       fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n",          \
 129                (SIZE), DECL_ALIGN (DECL) / BITS_PER_UNIT);              \
 130     }                                                                   \
 131   while (0)
 132 #endif
 133
 134 /* Decide whether to defer emitting the assembler output for an equate
 135    of two values.  The default is to not defer output.  */
 136 #ifndef TARGET_DEFERRED_OUTPUT_DEFS
 137 #define TARGET_DEFERRED_OUTPUT_DEFS(DECL,TARGET) false
 138 #endif
 139
 140 /* This is how to output the definition of a user-level label named
 141    NAME, such as the label on variable NAME.  */
 142
 143 #ifndef ASM_OUTPUT_LABEL
 144 #define ASM_OUTPUT_LABEL(FILE,NAME) \
 145   do {                                          \
 146     assemble_name ((FILE), (NAME));             \
 147     fputs (":\n", (FILE));                      \
 148   } while (0)
 149 #endif
 150
 151 /* This is how to output the definition of a user-level label named
 152    NAME, such as the label on a function.  */
 153
 154 #ifndef ASM_OUTPUT_FUNCTION_LABEL
 155 #define ASM_OUTPUT_FUNCTION_LABEL(FILE, NAME, DECL) \
 156   ASM_OUTPUT_LABEL ((FILE), (NAME))
 157 #endif
 158
 159 /* Output the definition of a compiler-generated label named NAME.  */
 160 #ifndef ASM_OUTPUT_INTERNAL_LABEL
 161 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,NAME)    \
 162   do {                                          \
 163     assemble_name_raw ((FILE), (NAME));         \
 164     fputs (":\n", (FILE));                      \
 165   } while (0)
 166 #endif
 167
 168 /* This is how to output a reference to a user-level label named NAME.  */
 169
 170 #ifndef ASM_OUTPUT_LABELREF
 171 #define ASM_OUTPUT_LABELREF(FILE,NAME)  \
 172   do {                                                  \
 173     fputs (user_label_prefix, (FILE));                  \
 174     fputs ((NAME), (FILE));                             \
 175   } while (0);
 176 #endif
 177
 178 /* Allow target to print debug info labels specially.  This is useful for
 179    VLIW targets, since debug info labels should go into the middle of
 180    instruction bundles instead of breaking them.  */
 181
 182 #ifndef ASM_OUTPUT_DEBUG_LABEL
 183 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
 184   (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM)
 185 #endif
 186
 187 /* This is how we tell the assembler that a symbol is weak.  */
 188 #ifndef ASM_OUTPUT_WEAK_ALIAS
 189 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
 190 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE)      \
 191   do                                                    \
 192     {                                                   \
 193       ASM_WEAKEN_LABEL (STREAM, NAME);                  \
 194       if (VALUE)                                        \
 195         ASM_OUTPUT_DEF (STREAM, NAME, VALUE);           \
 196     }                                                   \
 197   while (0)
 198 #endif
 199 #endif
 200
 201 /* This is how we tell the assembler that a symbol is a weak alias to
 202    another symbol that doesn't require the other symbol to be defined.
 203    Uses of the former will turn into weak uses of the latter, i.e.,
 204    uses that, in case the latter is undefined, will not cause errors,
 205    and will add it to the symbol table as weak undefined.  However, if
 206    the latter is referenced directly, a strong reference prevails.  */
 207 #ifndef ASM_OUTPUT_WEAKREF
 208 #if defined HAVE_GAS_WEAKREF
 209 #define ASM_OUTPUT_WEAKREF(FILE, DECL, NAME, VALUE)                     \
 210   do                                                                    \
 211     {                                                                   \
 212       fprintf ((FILE), "\t.weakref\t");                                 \
 213       assemble_name ((FILE), (NAME));                                   \
 214       fprintf ((FILE), ",");                                            \
 215       assemble_name ((FILE), (VALUE));                                  \
 216       fprintf ((FILE), "\n");                                           \
 217     }                                                                   \
 218   while (0)
 219 #endif
 220 #endif
 221
 222 /* How to emit a .type directive.  */
 223 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE
 224 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT
 225 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE)   \
 226   do                                                    \
 227     {                                                   \
 228       fputs (TYPE_ASM_OP, STREAM);                      \
 229       assemble_name (STREAM, NAME);                     \
 230       fputs (", ", STREAM);                             \
 231       fprintf (STREAM, TYPE_OPERAND_FMT, TYPE);         \
 232       putc ('\n', STREAM);                              \
 233     }                                                   \
 234   while (0)
 235 #endif
 236 #endif
 237
 238 /* How to emit a .size directive.  */
 239 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE
 240 #ifdef SIZE_ASM_OP
 241 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE)   \
 242   do                                                    \
 243     {                                                   \
 244       HOST_WIDE_INT size_ = (SIZE);                     \
 245       fputs (SIZE_ASM_OP, STREAM);                      \
 246       assemble_name (STREAM, NAME);                     \
 247       fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \
 248     }                                                   \
 249   while (0)
 250
 251 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME)          \
 252   do                                                    \
 253     {                                                   \
 254       fputs (SIZE_ASM_OP, STREAM);                      \
 255       assemble_name (STREAM, NAME);                     \
 256       fputs (", .-", STREAM);                           \
 257       assemble_name (STREAM, NAME);                     \
 258       putc ('\n', STREAM);                              \
 259     }                                                   \
 260   while (0)
 261
 262 #endif
 263 #endif
 264
 265 /* This determines whether or not we support weak symbols.  SUPPORTS_WEAK
 266    must be a preprocessor constant.  */
 267 #ifndef SUPPORTS_WEAK
 268 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
 269 #define SUPPORTS_WEAK 1
 270 #else
 271 #define SUPPORTS_WEAK 0
 272 #endif
 273 #endif
 274
 275 /* This determines whether or not we support weak symbols during target
 276    code generation.  TARGET_SUPPORTS_WEAK can be any valid C expression.  */
 277 #ifndef TARGET_SUPPORTS_WEAK
 278 #define TARGET_SUPPORTS_WEAK (SUPPORTS_WEAK)
 279 #endif
 280
 281 /* This determines whether or not we support the discriminator
 282    attribute in the .loc directive.  */
 283 #ifndef SUPPORTS_DISCRIMINATOR
 284 #ifdef HAVE_GAS_DISCRIMINATOR
 285 #define SUPPORTS_DISCRIMINATOR 1
 286 #else
 287 #define SUPPORTS_DISCRIMINATOR 0
 288 #endif
 289 #endif
 290
 291 /* This determines whether or not we support link-once semantics.  */
 292 #ifndef SUPPORTS_ONE_ONLY
 293 #ifdef MAKE_DECL_ONE_ONLY
 294 #define SUPPORTS_ONE_ONLY 1
 295 #else
 296 #define SUPPORTS_ONE_ONLY 0
 297 #endif
 298 #endif
 299
 300 /* This determines whether weak symbols must be left out of a static
 301    archive's table of contents.  Defining this macro to be nonzero has
 302    the consequence that certain symbols will not be made weak that
 303    otherwise would be.  The C++ ABI requires this macro to be zero;
 304    see the documentation.  */
 305 #ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 306 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
 307 #endif
 308
 309 /* This determines whether or not we need linkonce unwind information.  */
 310 #ifndef TARGET_USES_WEAK_UNWIND_INFO
 311 #define TARGET_USES_WEAK_UNWIND_INFO 0
 312 #endif
 313
 314 /* By default, there is no prefix on user-defined symbols.  */
 315 #ifndef USER_LABEL_PREFIX
 316 #define USER_LABEL_PREFIX ""
 317 #endif
 318
 319 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
 320    provide a weak attribute.  Else define it to nothing.
 321
 322    This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
 323    not available at that time.
 324
 325    Note, this is only for use by target files which we know are to be
 326    compiled by GCC.  */
 327 #ifndef TARGET_ATTRIBUTE_WEAK
 328 # if SUPPORTS_WEAK
 329 #  define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
 330 # else
 331 #  define TARGET_ATTRIBUTE_WEAK
 332 # endif
 333 #endif
 334
 335 /* Determines whether we may use common symbols to represent one-only
 336    semantics (a.k.a. "vague linkage").  */
 337 #ifndef USE_COMMON_FOR_ONE_ONLY
 338 # define USE_COMMON_FOR_ONE_ONLY 1
 339 #endif
 340
 341 /* By default we can assume that all global symbols are in one namespace,
 342    across all shared libraries.  */
 343 #ifndef MULTIPLE_SYMBOL_SPACES
 344 # define MULTIPLE_SYMBOL_SPACES 0
 345 #endif
 346
 347 /* If the target supports init_priority C++ attribute, give
 348    SUPPORTS_INIT_PRIORITY a nonzero value.  */
 349 #ifndef SUPPORTS_INIT_PRIORITY
 350 #define SUPPORTS_INIT_PRIORITY 1
 351 #endif /* SUPPORTS_INIT_PRIORITY */
 352
 353 /* If duplicate library search directories can be removed from a
 354    linker command without changing the linker's semantics, give this
 355    symbol a nonzero.  */
 356 #ifndef LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
 357 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 0
 358 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
 359
 360 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
 361    the rest of the DWARF 2 frame unwind support is also provided.  */
 362 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
 363 #define DWARF2_UNWIND_INFO 1
 364 #endif
 365
 366 /* If we have named sections, and we're using crtstuff to run ctors,
 367    use them for registering eh frame information.  */
 368 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
 369     && !defined(EH_FRAME_IN_DATA_SECTION)
 370 #ifndef EH_FRAME_SECTION_NAME
 371 #define EH_FRAME_SECTION_NAME ".eh_frame"
 372 #endif
 373 #endif
 374
 375 /* On many systems, different EH table encodings are used under
 376    difference circumstances.  Some will require runtime relocations;
 377    some will not.  For those that do not require runtime relocations,
 378    we would like to make the table read-only.  However, since the
 379    read-only tables may need to be combined with read-write tables
 380    that do require runtime relocation, it is not safe to make the
 381    tables read-only unless the linker will merge read-only and
 382    read-write sections into a single read-write section.  If your
 383    linker does not have this ability, but your system is such that no
 384    encoding used with non-PIC code will ever require a runtime
 385    relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in
 386    your target configuration file.  */
 387 #ifndef EH_TABLES_CAN_BE_READ_ONLY
 388 #ifdef HAVE_LD_RO_RW_SECTION_MIXING
 389 #define EH_TABLES_CAN_BE_READ_ONLY 1
 390 #else
 391 #define EH_TABLES_CAN_BE_READ_ONLY 0
 392 #endif
 393 #endif
 394
 395 /* If we have named section and we support weak symbols, then use the
 396    .jcr section for recording java classes which need to be registered
 397    at program start-up time.  */
 398 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
 399 #ifndef JCR_SECTION_NAME
 400 #define JCR_SECTION_NAME ".jcr"
 401 #endif
 402 #endif
 403
 404 /* This decision to use a .jcr section can be overridden by defining
 405    USE_JCR_SECTION to 0 in target file.  This is necessary if target
 406    can define JCR_SECTION_NAME but does not have crtstuff or
 407    linker support for .jcr section.  */
 408 #ifndef TARGET_USE_JCR_SECTION
 409 #ifdef JCR_SECTION_NAME
 410 #define TARGET_USE_JCR_SECTION 1
 411 #else
 412 #define TARGET_USE_JCR_SECTION 0
 413 #endif
 414 #endif
 415
 416 /* Number of hardware registers that go into the DWARF-2 unwind info.
 417    If not defined, equals FIRST_PSEUDO_REGISTER  */
 418
 419 #ifndef DWARF_FRAME_REGISTERS
 420 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
 421 #endif
 422
 423 /* Offsets recorded in opcodes are a multiple of this alignment factor.  */
 424 #ifndef DWARF_CIE_DATA_ALIGNMENT
 425 #ifdef STACK_GROWS_DOWNWARD
 426 #define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD))
 427 #else
 428 #define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD)
 429 #endif
 430 #endif
 431
 432 /* The DWARF 2 CFA column which tracks the return address.  Normally this
 433    is the column for PC, or the first column after all of the hard
 434    registers.  */
 435 #ifndef DWARF_FRAME_RETURN_COLUMN
 436 #ifdef PC_REGNUM
 437 #define DWARF_FRAME_RETURN_COLUMN       DWARF_FRAME_REGNUM (PC_REGNUM)
 438 #else
 439 #define DWARF_FRAME_RETURN_COLUMN       DWARF_FRAME_REGISTERS
 440 #endif
 441 #endif
 442
 443 /* How to renumber registers for dbx and gdb.  If not defined, assume
 444    no renumbering is necessary.  */
 445
 446 #ifndef DBX_REGISTER_NUMBER
 447 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 448 #endif
 449
 450 /* The mapping from gcc register number to DWARF 2 CFA column number.
 451    By default, we just provide columns for all registers.  */
 452 #ifndef DWARF_FRAME_REGNUM
 453 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
 454 #endif
 455
 456 /* Map register numbers held in the call frame info that gcc has
 457    collected using DWARF_FRAME_REGNUM to those that should be output in
 458    .debug_frame and .eh_frame.  */
 459 #ifndef DWARF2_FRAME_REG_OUT
 460 #define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) (REGNO)
 461 #endif
 462
 463 /* The size of addresses as they appear in the Dwarf 2 data.
 464    Some architectures use word addresses to refer to code locations,
 465    but Dwarf 2 info always uses byte addresses.  On such machines,
 466    Dwarf 2 addresses need to be larger than the architecture's
 467    pointers.  */
 468 #ifndef DWARF2_ADDR_SIZE
 469 #define DWARF2_ADDR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
 470 #endif
 471
 472 /* The size in bytes of a DWARF field indicating an offset or length
 473    relative to a debug info section, specified to be 4 bytes in the
 474    DWARF-2 specification.  The SGI/MIPS ABI defines it to be the same
 475    as PTR_SIZE.  */
 476 #ifndef DWARF_OFFSET_SIZE
 477 #define DWARF_OFFSET_SIZE 4
 478 #endif
 479
 480 /* The size in bytes of a DWARF 4 type signature.  */
 481 #ifndef DWARF_TYPE_SIGNATURE_SIZE
 482 #define DWARF_TYPE_SIGNATURE_SIZE 8
 483 #endif
 484
 485 /* Default sizes for base C types.  If the sizes are different for
 486    your target, you should override these values by defining the
 487    appropriate symbols in your tm.h file.  */
 488
 489 #ifndef BITS_PER_UNIT
 490 #define BITS_PER_UNIT 8
 491 #endif
 492
 493 #ifndef BITS_PER_WORD
 494 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
 495 #endif
 496
 497 #ifndef CHAR_TYPE_SIZE
 498 #define CHAR_TYPE_SIZE BITS_PER_UNIT
 499 #endif
 500
 501 #ifndef BOOL_TYPE_SIZE
 502 /* `bool' has size and alignment `1', on almost all platforms.  */
 503 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
 504 #endif
 505
 506 #ifndef SHORT_TYPE_SIZE
 507 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
 508 #endif
 509
 510 #ifndef INT_TYPE_SIZE
 511 #define INT_TYPE_SIZE BITS_PER_WORD
 512 #endif
 513
 514 #ifndef LONG_TYPE_SIZE
 515 #define LONG_TYPE_SIZE BITS_PER_WORD
 516 #endif
 517
 518 #ifndef LONG_LONG_TYPE_SIZE
 519 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
 520 #endif
 521
 522 #ifndef WCHAR_TYPE_SIZE
 523 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
 524 #endif
 525
 526 #ifndef FLOAT_TYPE_SIZE
 527 #define FLOAT_TYPE_SIZE BITS_PER_WORD
 528 #endif
 529
 530 #ifndef DOUBLE_TYPE_SIZE
 531 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 532 #endif
 533
 534 #ifndef LONG_DOUBLE_TYPE_SIZE
 535 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 536 #endif
 537
 538 #ifndef DECIMAL32_TYPE_SIZE
 539 #define DECIMAL32_TYPE_SIZE 32
 540 #endif
 541
 542 #ifndef DECIMAL64_TYPE_SIZE
 543 #define DECIMAL64_TYPE_SIZE 64
 544 #endif
 545
 546 #ifndef DECIMAL128_TYPE_SIZE
 547 #define DECIMAL128_TYPE_SIZE 128
 548 #endif
 549
 550 #ifndef SHORT_FRACT_TYPE_SIZE
 551 #define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT
 552 #endif
 553
 554 #ifndef FRACT_TYPE_SIZE
 555 #define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2)
 556 #endif
 557
 558 #ifndef LONG_FRACT_TYPE_SIZE
 559 #define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4)
 560 #endif
 561
 562 #ifndef LONG_LONG_FRACT_TYPE_SIZE
 563 #define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8)
 564 #endif
 565
 566 #ifndef SHORT_ACCUM_TYPE_SIZE
 567 #define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2)
 568 #endif
 569
 570 #ifndef ACCUM_TYPE_SIZE
 571 #define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2)
 572 #endif
 573
 574 #ifndef LONG_ACCUM_TYPE_SIZE
 575 #define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2)
 576 #endif
 577
 578 #ifndef LONG_LONG_ACCUM_TYPE_SIZE
 579 #define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2)
 580 #endif
 581
 582 /* We let tm.h override the types used here, to handle trivial differences
 583    such as the choice of unsigned int or long unsigned int for size_t.
 584    When machines start needing nontrivial differences in the size type,
 585    it would be best to do something here to figure out automatically
 586    from other information what type to use.  */
 587
 588 #ifndef SIZE_TYPE
 589 #define SIZE_TYPE "long unsigned int"
 590 #endif
 591
 592 #ifndef PID_TYPE
 593 #define PID_TYPE "int"
 594 #endif
 595
 596 /* If GCC knows the exact uint_least16_t and uint_least32_t types from
 597    <stdint.h>, use them for char16_t and char32_t.  Otherwise, use
 598    these guesses; getting the wrong type of a given width will not
 599    affect C++ name mangling because in C++ these are distinct types
 600    not typedefs.  */
 601
 602 #ifdef UINT_LEAST16_TYPE
 603 #define CHAR16_TYPE UINT_LEAST16_TYPE
 604 #else
 605 #define CHAR16_TYPE "short unsigned int"
 606 #endif
 607
 608 #ifdef UINT_LEAST32_TYPE
 609 #define CHAR32_TYPE UINT_LEAST32_TYPE
 610 #else
 611 #define CHAR32_TYPE "unsigned int"
 612 #endif
 613
 614 #ifndef WCHAR_TYPE
 615 #define WCHAR_TYPE "int"
 616 #endif
 617
 618 /* WCHAR_TYPE gets overridden by -fshort-wchar.  */
 619 #define MODIFIED_WCHAR_TYPE \
 620         (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE)
 621
 622 #ifndef PTRDIFF_TYPE
 623 #define PTRDIFF_TYPE "long int"
 624 #endif
 625
 626 #ifndef WINT_TYPE
 627 #define WINT_TYPE "unsigned int"
 628 #endif
 629
 630 #ifndef INTMAX_TYPE
 631 #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)     \
 632                      ? "int"                                    \
 633                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 634                         ? "long int"                            \
 635                         : "long long int"))
 636 #endif
 637
 638 #ifndef UINTMAX_TYPE
 639 #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)    \
 640                      ? "unsigned int"                           \
 641                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 642                         ? "long unsigned int"                   \
 643                         : "long long unsigned int"))
 644 #endif
 645
 646
 647 /* There are no default definitions of these <stdint.h> types.  */
 648
 649 #ifndef SIG_ATOMIC_TYPE
 650 #define SIG_ATOMIC_TYPE ((const char *) NULL)
 651 #endif
 652
 653 #ifndef INT8_TYPE
 654 #define INT8_TYPE ((const char *) NULL)
 655 #endif
 656
 657 #ifndef INT16_TYPE
 658 #define INT16_TYPE ((const char *) NULL)
 659 #endif
 660
 661 #ifndef INT32_TYPE
 662 #define INT32_TYPE ((const char *) NULL)
 663 #endif
 664
 665 #ifndef INT64_TYPE
 666 #define INT64_TYPE ((const char *) NULL)
 667 #endif
 668
 669 #ifndef UINT8_TYPE
 670 #define UINT8_TYPE ((const char *) NULL)
 671 #endif
 672
 673 #ifndef UINT16_TYPE
 674 #define UINT16_TYPE ((const char *) NULL)
 675 #endif
 676
 677 #ifndef UINT32_TYPE
 678 #define UINT32_TYPE ((const char *) NULL)
 679 #endif
 680
 681 #ifndef UINT64_TYPE
 682 #define UINT64_TYPE ((const char *) NULL)
 683 #endif
 684
 685 #ifndef INT_LEAST8_TYPE
 686 #define INT_LEAST8_TYPE ((const char *) NULL)
 687 #endif
 688
 689 #ifndef INT_LEAST16_TYPE
 690 #define INT_LEAST16_TYPE ((const char *) NULL)
 691 #endif
 692
 693 #ifndef INT_LEAST32_TYPE
 694 #define INT_LEAST32_TYPE ((const char *) NULL)
 695 #endif
 696
 697 #ifndef INT_LEAST64_TYPE
 698 #define INT_LEAST64_TYPE ((const char *) NULL)
 699 #endif
 700
 701 #ifndef UINT_LEAST8_TYPE
 702 #define UINT_LEAST8_TYPE ((const char *) NULL)
 703 #endif
 704
 705 #ifndef UINT_LEAST16_TYPE
 706 #define UINT_LEAST16_TYPE ((const char *) NULL)
 707 #endif
 708
 709 #ifndef UINT_LEAST32_TYPE
 710 #define UINT_LEAST32_TYPE ((const char *) NULL)
 711 #endif
 712
 713 #ifndef UINT_LEAST64_TYPE
 714 #define UINT_LEAST64_TYPE ((const char *) NULL)
 715 #endif
 716
 717 #ifndef INT_FAST8_TYPE
 718 #define INT_FAST8_TYPE ((const char *) NULL)
 719 #endif
 720
 721 #ifndef INT_FAST16_TYPE
 722 #define INT_FAST16_TYPE ((const char *) NULL)
 723 #endif
 724
 725 #ifndef INT_FAST32_TYPE
 726 #define INT_FAST32_TYPE ((const char *) NULL)
 727 #endif
 728
 729 #ifndef INT_FAST64_TYPE
 730 #define INT_FAST64_TYPE ((const char *) NULL)
 731 #endif
 732
 733 #ifndef UINT_FAST8_TYPE
 734 #define UINT_FAST8_TYPE ((const char *) NULL)
 735 #endif
 736
 737 #ifndef UINT_FAST16_TYPE
 738 #define UINT_FAST16_TYPE ((const char *) NULL)
 739 #endif
 740
 741 #ifndef UINT_FAST32_TYPE
 742 #define UINT_FAST32_TYPE ((const char *) NULL)
 743 #endif
 744
 745 #ifndef UINT_FAST64_TYPE
 746 #define UINT_FAST64_TYPE ((const char *) NULL)
 747 #endif
 748
 749 #ifndef INTPTR_TYPE
 750 #define INTPTR_TYPE ((const char *) NULL)
 751 #endif
 752
 753 #ifndef UINTPTR_TYPE
 754 #define UINTPTR_TYPE ((const char *) NULL)
 755 #endif
 756
 757 /* Width in bits of a pointer.  Mind the value of the macro `Pmode'.  */
 758 #ifndef POINTER_SIZE
 759 #define POINTER_SIZE BITS_PER_WORD
 760 #endif
 761
 762 #ifndef PIC_OFFSET_TABLE_REGNUM
 763 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
 764 #endif
 765
 766 #ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
 767 #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 0
 768 #endif
 769
 770 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
 771 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
 772 #endif
 773
 774 #ifndef TARGET_DECLSPEC
 775 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
 776 /* If the target supports the "dllimport" attribute, users are
 777    probably used to the "__declspec" syntax.  */
 778 #define TARGET_DECLSPEC 1
 779 #else
 780 #define TARGET_DECLSPEC 0
 781 #endif
 782 #endif
 783
 784 /* By default, the preprocessor should be invoked the same way in C++
 785    as in C.  */
 786 #ifndef CPLUSPLUS_CPP_SPEC
 787 #ifdef CPP_SPEC
 788 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
 789 #endif
 790 #endif
 791
 792 #ifndef ACCUMULATE_OUTGOING_ARGS
 793 #define ACCUMULATE_OUTGOING_ARGS 0
 794 #endif
 795
 796 /* By default, use the GNU runtime for Objective C.  */
 797 #ifndef NEXT_OBJC_RUNTIME
 798 #define NEXT_OBJC_RUNTIME 0
 799 #endif
 800
 801 /* Supply a default definition for PUSH_ARGS.  */
 802 #ifndef PUSH_ARGS
 803 #ifdef PUSH_ROUNDING
 804 #define PUSH_ARGS       !ACCUMULATE_OUTGOING_ARGS
 805 #else
 806 #define PUSH_ARGS       0
 807 #endif
 808 #endif
 809
 810 /* Decide whether a function's arguments should be processed
 811    from first to last or from last to first.
 812
 813    They should if the stack and args grow in opposite directions, but
 814    only if we have push insns.  */
 815
 816 #ifdef PUSH_ROUNDING
 817
 818 #ifndef PUSH_ARGS_REVERSED
 819 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
 820 #define PUSH_ARGS_REVERSED  PUSH_ARGS
 821 #endif
 822 #endif
 823
 824 #endif
 825
 826 #ifndef PUSH_ARGS_REVERSED
 827 #define PUSH_ARGS_REVERSED 0
 828 #endif
 829
 830 /* Default value for the alignment (in bits) a C conformant malloc has to
 831    provide. This default is intended to be safe and always correct.  */
 832 #ifndef MALLOC_ABI_ALIGNMENT
 833 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
 834 #endif
 835
 836 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
 837    STACK_BOUNDARY is required.  */
 838 #ifndef PREFERRED_STACK_BOUNDARY
 839 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
 840 #endif
 841
 842 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not
 843    defined.  */
 844 #ifndef INCOMING_STACK_BOUNDARY
 845 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY
 846 #endif
 847
 848 #ifndef TARGET_DEFAULT_PACK_STRUCT
 849 #define TARGET_DEFAULT_PACK_STRUCT 0
 850 #endif
 851
 852 /* By default, the vtable entries are void pointers, the so the alignment
 853    is the same as pointer alignment.  The value of this macro specifies
 854    the alignment of the vtable entry in bits.  It should be defined only
 855    when special alignment is necessary.  */
 856 #ifndef TARGET_VTABLE_ENTRY_ALIGN
 857 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
 858 #endif
 859
 860 /* There are a few non-descriptor entries in the vtable at offsets below
 861    zero.  If these entries must be padded (say, to preserve the alignment
 862    specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
 863    words in each data entry.  */
 864 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
 865 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
 866 #endif
 867
 868 /* Decide whether it is safe to use a local alias for a virtual function
 869    when constructing thunks.  */
 870 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
 871 #ifdef ASM_OUTPUT_DEF
 872 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
 873 #else
 874 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
 875 #endif
 876 #endif
 877
 878 /* Select a format to encode pointers in exception handling data.  We
 879    prefer those that result in fewer dynamic relocations.  Assume no
 880    special support here and encode direct references.  */
 881 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
 882 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  DW_EH_PE_absptr
 883 #endif
 884
 885 /* By default, the C++ compiler will use the lowest bit of the pointer
 886    to function to indicate a pointer-to-member-function points to a
 887    virtual member function.  However, if FUNCTION_BOUNDARY indicates
 888    function addresses aren't always even, the lowest bit of the delta
 889    field will be used.  */
 890 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
 891 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
 892   (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
 893    ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
 894 #endif
 895
 896 #ifndef DEFAULT_GDB_EXTENSIONS
 897 #define DEFAULT_GDB_EXTENSIONS 1
 898 #endif
 899
 900 /* If more than one debugging type is supported, you must define
 901    PREFERRED_DEBUGGING_TYPE to choose the default.  */
 902
 903 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
 904          + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
 905          + defined (VMS_DEBUGGING_INFO))
 906 #ifndef PREFERRED_DEBUGGING_TYPE
 907 #error You must define PREFERRED_DEBUGGING_TYPE
 908 #endif /* no PREFERRED_DEBUGGING_TYPE */
 909
 910 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
 911    here so other code needn't care.  */
 912 #elif defined DBX_DEBUGGING_INFO
 913 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 914
 915 #elif defined SDB_DEBUGGING_INFO
 916 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
 917
 918 #elif defined DWARF2_DEBUGGING_INFO
 919 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 920
 921 #elif defined VMS_DEBUGGING_INFO
 922 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
 923
 924 #elif defined XCOFF_DEBUGGING_INFO
 925 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
 926
 927 #else
 928 /* No debugging format is supported by this target.  */
 929 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
 930 #endif
 931
 932 #ifndef LARGEST_EXPONENT_IS_NORMAL
 933 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
 934 #endif
 935
 936 #ifndef ROUND_TOWARDS_ZERO
 937 #define ROUND_TOWARDS_ZERO 0
 938 #endif
 939
 940 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
 941 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
 942 #endif
 943
 944 /* True if the targets integer-comparison functions return { 0, 1, 2
 945    } to indicate { <, ==, > }.  False if { -1, 0, 1 } is used
 946    instead.  The libgcc routines are biased.  */
 947 #ifndef TARGET_LIB_INT_CMP_BIASED
 948 #define TARGET_LIB_INT_CMP_BIASED (true)
 949 #endif
 950
 951 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
 952    then the word-endianness is the same as for integers.  */
 953 #ifndef FLOAT_WORDS_BIG_ENDIAN
 954 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 955 #endif
 956
 957 #ifndef REG_WORDS_BIG_ENDIAN
 958 #define REG_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 959 #endif
 960
 961 #ifdef TARGET_FLT_EVAL_METHOD
 962 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 1
 963 #else
 964 #define TARGET_FLT_EVAL_METHOD 0
 965 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 0
 966 #endif
 967
 968 #ifndef TARGET_DEC_EVAL_METHOD
 969 #define TARGET_DEC_EVAL_METHOD 2
 970 #endif
 971
 972 #ifndef HAS_LONG_COND_BRANCH
 973 #define HAS_LONG_COND_BRANCH 0
 974 #endif
 975
 976 #ifndef HAS_LONG_UNCOND_BRANCH
 977 #define HAS_LONG_UNCOND_BRANCH 0
 978 #endif
 979
 980 /* Determine whether __cxa_atexit, rather than atexit, is used to
 981    register C++ destructors for local statics and global objects.  */
 982 #ifndef DEFAULT_USE_CXA_ATEXIT
 983 #define DEFAULT_USE_CXA_ATEXIT 0
 984 #endif
 985
 986 /* If none of these macros are defined, the port must use the new
 987    technique of defining constraints in the machine description.
 988    tm_p.h will define those macros that machine-independent code
 989    still uses.  */
 990 #if  !defined CONSTRAINT_LEN                    \
 991   && !defined REG_CLASS_FROM_LETTER             \
 992   && !defined REG_CLASS_FROM_CONSTRAINT         \
 993   && !defined CONST_OK_FOR_LETTER_P             \
 994   && !defined CONST_OK_FOR_CONSTRAINT_P         \
 995   && !defined CONST_DOUBLE_OK_FOR_LETTER_P      \
 996   && !defined CONST_DOUBLE_OK_FOR_CONSTRAINT_P  \
 997   && !defined EXTRA_CONSTRAINT                  \
 998   && !defined EXTRA_CONSTRAINT_STR              \
 999   && !defined EXTRA_MEMORY_CONSTRAINT           \
1000   && !defined EXTRA_ADDRESS_CONSTRAINT
1001
1002 #define USE_MD_CONSTRAINTS
1003
1004 #if GCC_VERSION >= 3000 && defined IN_GCC
1005 /* These old constraint macros shouldn't appear anywhere in a
1006    configuration using MD constraint definitions.  */
1007 #pragma GCC poison REG_CLASS_FROM_LETTER CONST_OK_FOR_LETTER_P \
1008                    CONST_DOUBLE_OK_FOR_LETTER_P EXTRA_CONSTRAINT
1009 #endif
1010
1011 #else /* old constraint mechanism in use */
1012
1013 /* Determine whether extra constraint letter should be handled
1014    via address reload (like 'o').  */
1015 #ifndef EXTRA_MEMORY_CONSTRAINT
1016 #define EXTRA_MEMORY_CONSTRAINT(C,STR) 0
1017 #endif
1018
1019 /* Determine whether extra constraint letter should be handled
1020    as an address (like 'p').  */
1021 #ifndef EXTRA_ADDRESS_CONSTRAINT
1022 #define EXTRA_ADDRESS_CONSTRAINT(C,STR) 0
1023 #endif
1024
1025 /* When a port defines CONSTRAINT_LEN, it should use DEFAULT_CONSTRAINT_LEN
1026    for all the characters that it does not want to change, so things like the
1027   'length' of a digit in a matching constraint is an implementation detail,
1028    and not part of the interface.  */
1029 #define DEFAULT_CONSTRAINT_LEN(C,STR) 1
1030
1031 #ifndef CONSTRAINT_LEN
1032 #define CONSTRAINT_LEN(C,STR) DEFAULT_CONSTRAINT_LEN (C, STR)
1033 #endif
1034
1035 #if defined (CONST_OK_FOR_LETTER_P) && ! defined (CONST_OK_FOR_CONSTRAINT_P)
1036 #define CONST_OK_FOR_CONSTRAINT_P(VAL,C,STR) CONST_OK_FOR_LETTER_P (VAL, C)
1037 #endif
1038
1039 #if defined (CONST_DOUBLE_OK_FOR_LETTER_P) && ! defined (CONST_DOUBLE_OK_FOR_CONSTRAINT_P)
1040 #define CONST_DOUBLE_OK_FOR_CONSTRAINT_P(OP,C,STR) \
1041   CONST_DOUBLE_OK_FOR_LETTER_P (OP, C)
1042 #endif
1043
1044 #ifndef REG_CLASS_FROM_CONSTRAINT
1045 #define REG_CLASS_FROM_CONSTRAINT(C,STR) REG_CLASS_FROM_LETTER (C)
1046 #endif
1047
1048 #if defined (EXTRA_CONSTRAINT) && ! defined (EXTRA_CONSTRAINT_STR)
1049 #define EXTRA_CONSTRAINT_STR(OP, C,STR) EXTRA_CONSTRAINT (OP, C)
1050 #endif
1051
1052 #endif /* old constraint mechanism in use */
1053
1054 /* Determine whether the entire c99 runtime
1055    is present in the runtime library.  */
1056 #ifndef TARGET_C99_FUNCTIONS
1057 #define TARGET_C99_FUNCTIONS 0
1058 #endif
1059
1060 /* Determine whether the target runtime library has
1061    a sincos implementation following the GNU extension.  */
1062 #ifndef TARGET_HAS_SINCOS
1063 #define TARGET_HAS_SINCOS 0
1064 #endif
1065
1066 /* Indicate that CLZ and CTZ are undefined at zero.  */
1067 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
1068 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
1069 #endif
1070 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
1071 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
1072 #endif
1073
1074 /* Provide a default value for STORE_FLAG_VALUE.  */
1075 #ifndef STORE_FLAG_VALUE
1076 #define STORE_FLAG_VALUE  1
1077 #endif
1078
1079 /* This macro is used to determine what the largest unit size that
1080    move_by_pieces can use is.  */
1081
1082 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
1083    move efficiently, as opposed to  MOVE_MAX which is the maximum
1084    number of bytes we can move with a single instruction.  */
1085
1086 #ifndef MOVE_MAX_PIECES
1087 #define MOVE_MAX_PIECES   MOVE_MAX
1088 #endif
1089
1090 #ifndef MAX_MOVE_MAX
1091 #define MAX_MOVE_MAX MOVE_MAX
1092 #endif
1093
1094 #ifndef MIN_UNITS_PER_WORD
1095 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
1096 #endif
1097
1098 #ifndef MAX_BITS_PER_WORD
1099 #define MAX_BITS_PER_WORD BITS_PER_WORD
1100 #endif
1101
1102 #ifndef STACK_POINTER_OFFSET
1103 #define STACK_POINTER_OFFSET    0
1104 #endif
1105
1106 #ifndef LOCAL_REGNO
1107 #define LOCAL_REGNO(REGNO)  0
1108 #endif
1109
1110 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1111    the stack pointer does not matter.  The value is tested only in
1112    functions that have frame pointers.  */
1113 #ifndef EXIT_IGNORE_STACK
1114 #define EXIT_IGNORE_STACK 0
1115 #endif
1116
1117 /* Assume that case vectors are not pc-relative.  */
1118 #ifndef CASE_VECTOR_PC_RELATIVE
1119 #define CASE_VECTOR_PC_RELATIVE 0
1120 #endif
1121
1122 /* Assume that trampolines need function alignment.  */
1123 #ifndef TRAMPOLINE_ALIGNMENT
1124 #define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY
1125 #endif
1126
1127 /* Register mappings for target machines without register windows.  */
1128 #ifndef INCOMING_REGNO
1129 #define INCOMING_REGNO(N) (N)
1130 #endif
1131
1132 #ifndef OUTGOING_REGNO
1133 #define OUTGOING_REGNO(N) (N)
1134 #endif
1135
1136 #ifndef SHIFT_COUNT_TRUNCATED
1137 #define SHIFT_COUNT_TRUNCATED 0
1138 #endif
1139
1140 #ifndef LEGITIMATE_PIC_OPERAND_P
1141 #define LEGITIMATE_PIC_OPERAND_P(X) 1
1142 #endif
1143
1144 #ifndef TARGET_MEM_CONSTRAINT
1145 #define TARGET_MEM_CONSTRAINT 'm'
1146 #endif
1147
1148 #ifndef REVERSIBLE_CC_MODE
1149 #define REVERSIBLE_CC_MODE(MODE) 0
1150 #endif
1151
1152 /* Biggest alignment supported by the object file format of this machine.  */
1153 #ifndef MAX_OFILE_ALIGNMENT
1154 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
1155 #endif
1156
1157 #ifndef FRAME_GROWS_DOWNWARD
1158 #define FRAME_GROWS_DOWNWARD 0
1159 #endif
1160
1161 /* On most machines, the CFA coincides with the first incoming parm.  */
1162 #ifndef ARG_POINTER_CFA_OFFSET
1163 #define ARG_POINTER_CFA_OFFSET(FNDECL) \
1164   (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
1165 #endif
1166
1167 /* On most machines, we use the CFA as DW_AT_frame_base.  */
1168 #ifndef CFA_FRAME_BASE_OFFSET
1169 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0
1170 #endif
1171
1172 /* The offset from the incoming value of %sp to the top of the stack frame
1173    for the current function.  */
1174 #ifndef INCOMING_FRAME_SP_OFFSET
1175 #define INCOMING_FRAME_SP_OFFSET 0
1176 #endif
1177
1178 #ifndef HARD_REGNO_NREGS_HAS_PADDING
1179 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
1180 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
1181 #endif
1182
1183 #ifndef OUTGOING_REG_PARM_STACK_SPACE
1184 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
1185 #endif
1186
1187 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
1188    the backend.  MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
1189    effort stack alignment supported by the backend.  If the backend
1190    supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
1191    MAX_STACK_ALIGNMENT are the same.  Otherwise, the incoming stack
1192    boundary will limit the maximum guaranteed stack alignment.  */
1193 #ifdef MAX_STACK_ALIGNMENT
1194 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
1195 #else
1196 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY
1197 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
1198 #endif
1199
1200 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
1201
1202 #ifndef LOCAL_ALIGNMENT
1203 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
1204 #endif
1205
1206 #ifndef STACK_SLOT_ALIGNMENT
1207 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
1208   ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
1209 #endif
1210
1211 #ifndef LOCAL_DECL_ALIGNMENT
1212 #define LOCAL_DECL_ALIGNMENT(DECL) \
1213   LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
1214 #endif
1215
1216 #ifndef MINIMUM_ALIGNMENT
1217 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN)
1218 #endif
1219
1220 /* Alignment value for attribute ((aligned)).  */
1221 #ifndef ATTRIBUTE_ALIGNED_VALUE
1222 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
1223 #endif
1224
1225 /* Many ports have no mode-dependent addresses (except possibly autoincrement
1226    and autodecrement addresses, which are handled by target-independent code
1227    in recog.c).  */
1228 #ifndef GO_IF_MODE_DEPENDENT_ADDRESS
1229 #define GO_IF_MODE_DEPENDENT_ADDRESS(X, WIN)
1230 #endif
1231
1232 /* For most ports anything that evaluates to a constant symbolic
1233    or integer value is acceptable as a constant address.  */
1234 #ifndef CONSTANT_ADDRESS_P
1235 #define CONSTANT_ADDRESS_P(X)   (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE)
1236 #endif
1237
1238 #ifndef MAX_FIXED_MODE_SIZE
1239 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
1240 #endif
1241
1242 /* Nonzero if structures and unions should be returned in memory.
1243
1244    This should only be defined if compatibility with another compiler or
1245    with an ABI is needed, because it results in slower code.  */
1246
1247 #ifndef DEFAULT_PCC_STRUCT_RETURN
1248 #define DEFAULT_PCC_STRUCT_RETURN 1
1249 #endif
1250
1251 #ifdef GCC_INSN_FLAGS_H
1252 /* Dependent default target macro definitions
1253
1254    This section of defaults.h defines target macros that depend on generated
1255    headers.  This is a bit awkward:  We want to put all default definitions
1256    for target macros in defaults.h, but some of the defaults depend on the
1257    HAVE_* flags defines of insn-flags.h.  But insn-flags.h is not always
1258    included by files that do include defaults.h.
1259
1260    Fortunately, the default macro definitions that depend on the HAVE_*
1261    macros are also the ones that will only be used inside GCC itself, i.e.
1262    not in the gen* programs or in target objects like libgcc.
1263
1264    Obviously, it would be best to keep this section of defaults.h as small
1265    as possible, by converting the macros defined below to target hooks or
1266    functions.
1267 */
1268
1269 /* The default branch cost is 1.  */
1270 #ifndef BRANCH_COST
1271 #define BRANCH_COST(speed_p, predictable_p) 1
1272 #endif
1273
1274 /* If a memory-to-memory move would take MOVE_RATIO or more simple
1275    move-instruction sequences, we will do a movmem or libcall instead.  */
1276
1277 #ifndef MOVE_RATIO
1278 #if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti)
1279 #define MOVE_RATIO(speed) 2
1280 #else
1281 /* If we are optimizing for space (-Os), cut down the default move ratio.  */
1282 #define MOVE_RATIO(speed) ((speed) ? 15 : 3)
1283 #endif
1284 #endif
1285
1286 /* If a clear memory operation would take CLEAR_RATIO or more simple
1287    move-instruction sequences, we will do a setmem or libcall instead.  */
1288
1289 #ifndef CLEAR_RATIO
1290 #if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
1291 #define CLEAR_RATIO(speed) 2
1292 #else
1293 /* If we are optimizing for space, cut down the default clear ratio.  */
1294 #define CLEAR_RATIO(speed) ((speed) ? 15 :3)
1295 #endif
1296 #endif
1297
1298 /* If a memory set (to value other than zero) operation would take
1299    SET_RATIO or more simple move-instruction sequences, we will do a movmem
1300    or libcall instead.  */
1301 #ifndef SET_RATIO
1302 #define SET_RATIO(speed) MOVE_RATIO(speed)
1303 #endif
1304
1305 /* Supply a default definition for FUNCTION_ARG_PADDING:
1306    usually pad upward, but pad short args downward on
1307    big-endian machines.  */
1308
1309 #define DEFAULT_FUNCTION_ARG_PADDING(MODE, TYPE)                        \
1310   (! BYTES_BIG_ENDIAN                                                   \
1311    ? upward                                                             \
1312    : (((MODE) == BLKmode                                                \
1313        ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST         \
1314           && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \
1315        : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY)                       \
1316       ? downward : upward))
1317
1318 #ifndef FUNCTION_ARG_PADDING
1319 #define FUNCTION_ARG_PADDING(MODE, TYPE)        \
1320   DEFAULT_FUNCTION_ARG_PADDING ((MODE), (TYPE))
1321 #endif
1322
1323 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
1324    Normally move_insn, so Pmode stack pointer.  */
1325
1326 #ifndef STACK_SAVEAREA_MODE
1327 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
1328 #endif
1329
1330 /* Supply a default definition of STACK_SIZE_MODE for
1331    allocate_dynamic_stack_space.  Normally PLUS/MINUS, so word_mode.  */
1332
1333 #ifndef STACK_SIZE_MODE
1334 #define STACK_SIZE_MODE word_mode
1335 #endif
1336
1337 /* Provide default values for the macros controlling stack checking.  */
1338
1339 /* The default is neither full builtin stack checking...  */
1340 #ifndef STACK_CHECK_BUILTIN
1341 #define STACK_CHECK_BUILTIN 0
1342 #endif
1343
1344 /* ...nor static builtin stack checking.  */
1345 #ifndef STACK_CHECK_STATIC_BUILTIN
1346 #define STACK_CHECK_STATIC_BUILTIN 0
1347 #endif
1348
1349 /* The default interval is one page (4096 bytes).  */
1350 #ifndef STACK_CHECK_PROBE_INTERVAL_EXP
1351 #define STACK_CHECK_PROBE_INTERVAL_EXP 12
1352 #endif
1353
1354 /* The default is not to move the stack pointer.  */
1355 #ifndef STACK_CHECK_MOVING_SP
1356 #define STACK_CHECK_MOVING_SP 0
1357 #endif
1358
1359 /* This is a kludge to try to capture the discrepancy between the old
1360    mechanism (generic stack checking) and the new mechanism (static
1361    builtin stack checking).  STACK_CHECK_PROTECT needs to be bumped
1362    for the latter because part of the protection area is effectively
1363    included in STACK_CHECK_MAX_FRAME_SIZE for the former.  */
1364 #ifdef STACK_CHECK_PROTECT
1365 #define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
1366 #else
1367 #define STACK_OLD_CHECK_PROTECT                                         \
1368  (targetm_common.except_unwind_info (&global_options) == UI_SJLJ        \
1369   ? 75 * UNITS_PER_WORD                                                 \
1370   : 8 * 1024)
1371 #endif
1372
1373 /* Minimum amount of stack required to recover from an anticipated stack
1374    overflow detection.  The default value conveys an estimate of the amount
1375    of stack required to propagate an exception.  */
1376 #ifndef STACK_CHECK_PROTECT
1377 #define STACK_CHECK_PROTECT                                             \
1378  (targetm_common.except_unwind_info (&global_options) == UI_SJLJ        \
1379   ? 75 * UNITS_PER_WORD                                                 \
1380   : 12 * 1024)
1381 #endif
1382
1383 /* Make the maximum frame size be the largest we can and still only need
1384    one probe per function.  */
1385 #ifndef STACK_CHECK_MAX_FRAME_SIZE
1386 #define STACK_CHECK_MAX_FRAME_SIZE \
1387   ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD)
1388 #endif
1389
1390 /* This is arbitrary, but should be large enough everywhere.  */
1391 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
1392 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
1393 #endif
1394
1395 /* Provide a reasonable default for the maximum size of an object to
1396    allocate in the fixed frame.  We may need to be able to make this
1397    controllable by the user at some point.  */
1398 #ifndef STACK_CHECK_MAX_VAR_SIZE
1399 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
1400 #endif
1401
1402 /* By default, the C++ compiler will use function addresses in the
1403    vtable entries.  Setting this nonzero tells the compiler to use
1404    function descriptors instead.  The value of this macro says how
1405    many words wide the descriptor is (normally 2).  It is assumed
1406    that the address of a function descriptor may be treated as a
1407    pointer to a function.  */
1408 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
1409 #define TARGET_VTABLE_USES_DESCRIPTORS 0
1410 #endif
1411
1412 #ifndef SWITCHABLE_TARGET
1413 #define SWITCHABLE_TARGET 0
1414 #endif
1415
1416 #endif /* GCC_INSN_FLAGS_H  */
1417
1418 #endif  /* ! GCC_DEFAULTS_H */