gcc/defaults.h

   1 /* Definitions of various defaults for tm.h macros.
   2    Copyright (C) 1992, 1996, 1997, 1998, 1999, 2000, 2001, 2002
   3    Free Software Foundation, Inc.
   4    Contributed by Ron Guilmette (rfg@monkeys.com)
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 2, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING.  If not, write to the Free
  20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  21 02111-1307, USA.  */
  22
  23 #ifndef GCC_DEFAULTS_H
  24 #define GCC_DEFAULTS_H
  25
  26 #ifndef GET_ENVIRONMENT
  27 #define GET_ENVIRONMENT(VALUE, NAME) do { (VALUE) = getenv (NAME); } while (0)
  28 #endif
  29
  30 #define obstack_chunk_alloc xmalloc
  31 #define obstack_chunk_free free
  32
  33 /* Define default standard character escape sequences.  */
  34 #ifndef TARGET_BELL
  35 #  define TARGET_BELL 007
  36 #  define TARGET_BS 010
  37 #  define TARGET_TAB 011
  38 #  define TARGET_NEWLINE 012
  39 #  define TARGET_VT 013
  40 #  define TARGET_FF 014
  41 #  define TARGET_CR 015
  42 #  define TARGET_ESC 033
  43 #endif
  44
  45 /* When removal of CPP_PREDEFINES is complete, TARGET_CPU_CPP_BULITINS
  46    can also be removed from here.  */
  47 #ifndef TARGET_OS_CPP_BUILTINS
  48 # define TARGET_OS_CPP_BUILTINS()
  49 #endif
  50 #ifndef TARGET_CPU_CPP_BUILTINS
  51 # define TARGET_CPU_CPP_BUILTINS()
  52 #endif
  53 #ifndef CPP_PREDEFINES
  54 # define CPP_PREDEFINES ""
  55 #endif
  56
  57 /* Store in OUTPUT a string (made with alloca) containing
  58    an assembler-name for a local static variable or function named NAME.
  59    LABELNO is an integer which is different for each call.  */
  60
  61 #ifndef ASM_FORMAT_PRIVATE_NAME
  62 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO)                  \
  63   do {                                                                  \
  64     int len = strlen (NAME);                                            \
  65     char *temp = (char *) alloca (len + 3);                             \
  66     temp[0] = 'L';                                                      \
  67     strcpy (&temp[1], (NAME));                                          \
  68     temp[len + 1] = '.';                                                \
  69     temp[len + 2] = 0;                                                  \
  70     (OUTPUT) = (char *) alloca (strlen (NAME) + 11);                    \
  71     ASM_GENERATE_INTERNAL_LABEL (OUTPUT, temp, LABELNO);                \
  72   } while (0)
  73 #endif
  74
  75 #ifndef ASM_STABD_OP
  76 #define ASM_STABD_OP "\t.stabd\t"
  77 #endif
  78
  79 /* This is how to output an element of a case-vector that is absolute.
  80    Some targets don't use this, but we have to define it anyway.  */
  81
  82 #ifndef ASM_OUTPUT_ADDR_VEC_ELT
  83 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
  84 do { fputs (integer_asm_op (POINTER_SIZE / UNITS_PER_WORD, TRUE), FILE); \
  85      ASM_OUTPUT_INTERNAL_LABEL (FILE, "L", (VALUE));                    \
  86      fputc ('\n', FILE);                                                \
  87    } while (0)
  88 #endif
  89
  90 /* choose a reasonable default for ASM_OUTPUT_ASCII.  */
  91
  92 #ifndef ASM_OUTPUT_ASCII
  93 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
  94   do {                                                                        \
  95     FILE *_hide_asm_out_file = (MYFILE);                                      \
  96     const unsigned char *_hide_p = (const unsigned char *) (MYSTRING);        \
  97     int _hide_thissize = (MYLENGTH);                                          \
  98     {                                                                         \
  99       FILE *asm_out_file = _hide_asm_out_file;                                \
 100       const unsigned char *p = _hide_p;                                       \
 101       int thissize = _hide_thissize;                                          \
 102       int i;                                                                  \
 103       fprintf (asm_out_file, "\t.ascii \"");                                  \
 104                                                                               \
 105       for (i = 0; i < thissize; i++)                                          \
 106         {                                                                     \
 107           int c = p[i];                                                       \
 108           if (c == '\"' || c == '\\')                                         \
 109             putc ('\\', asm_out_file);                                        \
 110           if (ISPRINT(c))                                                     \
 111             putc (c, asm_out_file);                                           \
 112           else                                                                \
 113             {                                                                 \
 114               fprintf (asm_out_file, "\\%o", c);                              \
 115               /* After an octal-escape, if a digit follows,                   \
 116                  terminate one string constant and start another.             \
 117                  The VAX assembler fails to stop reading the escape           \
 118                  after three digits, so this is the only way we               \
 119                  can get it to parse the data properly.  */                   \
 120               if (i < thissize - 1 && ISDIGIT(p[i + 1]))                      \
 121                 fprintf (asm_out_file, "\"\n\t.ascii \"");                    \
 122           }                                                                   \
 123         }                                                                     \
 124       fprintf (asm_out_file, "\"\n");                                         \
 125     }                                                                         \
 126   }                                                                           \
 127   while (0)
 128 #endif
 129
 130 /* This is how we tell the assembler to equate two values.  */
 131 #ifdef SET_ASM_OP
 132 #ifndef ASM_OUTPUT_DEF
 133 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
 134  do {   fprintf ((FILE), "%s", SET_ASM_OP);                             \
 135         assemble_name (FILE, LABEL1);                                   \
 136         fprintf (FILE, ",");                                            \
 137         assemble_name (FILE, LABEL2);                                   \
 138         fprintf (FILE, "\n");                                           \
 139   } while (0)
 140 #endif
 141 #endif
 142
 143 /* This is how to output a reference to a user-level label named NAME.  */
 144
 145 #ifndef ASM_OUTPUT_LABELREF
 146 #define ASM_OUTPUT_LABELREF(FILE,NAME)  asm_fprintf ((FILE), "%U%s", (NAME))
 147 #endif
 148
 149 /* Allow target to print debug info labels specially.  This is useful for
 150    VLIW targets, since debug info labels should go into the middle of
 151    instruction bundles instead of breaking them.  */
 152
 153 #ifndef ASM_OUTPUT_DEBUG_LABEL
 154 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
 155   ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM)
 156 #endif
 157
 158 /* This is how we tell the assembler that a symbol is weak.  */
 159 #ifndef ASM_OUTPUT_WEAK_ALIAS
 160 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
 161 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE)      \
 162   do                                                    \
 163     {                                                   \
 164       ASM_WEAKEN_LABEL (STREAM, NAME);                  \
 165       if (VALUE)                                        \
 166         ASM_OUTPUT_DEF (STREAM, NAME, VALUE);           \
 167     }                                                   \
 168   while (0)
 169 #endif
 170 #endif
 171
 172 /* How to emit a .type directive.  */
 173 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE
 174 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT
 175 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE)   \
 176   do                                                    \
 177     {                                                   \
 178       fputs (TYPE_ASM_OP, STREAM);                      \
 179       assemble_name (STREAM, NAME);                     \
 180       fputs (", ", STREAM);                             \
 181       fprintf (STREAM, TYPE_OPERAND_FMT, TYPE);         \
 182       putc ('\n', STREAM);                              \
 183     }                                                   \
 184   while (0)
 185 #endif
 186 #endif
 187
 188 /* How to emit a .size directive.  */
 189 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE
 190 #ifdef SIZE_ASM_OP
 191 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE)   \
 192   do                                                    \
 193     {                                                   \
 194       HOST_WIDE_INT size_ = (SIZE);                     \
 195       fputs (SIZE_ASM_OP, STREAM);                      \
 196       assemble_name (STREAM, NAME);                     \
 197       fputs (", ", STREAM);                             \
 198       fprintf (STREAM, HOST_WIDE_INT_PRINT_DEC, size_); \
 199       putc ('\n', STREAM);                              \
 200     }                                                   \
 201   while (0)
 202
 203 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, BEG, END)      \
 204   do                                                    \
 205     {                                                   \
 206       fputs (SIZE_ASM_OP, STREAM);                      \
 207       assemble_name (STREAM, BEG);                      \
 208       fputs (", ", STREAM);                             \
 209       assemble_name (STREAM, END);                      \
 210       putc ('-', STREAM);                               \
 211       assemble_name (STREAM, BEG);                      \
 212       putc ('\n', STREAM);                              \
 213     }                                                   \
 214   while (0)
 215
 216 #endif
 217 #endif
 218
 219 /* This determines whether or not we support weak symbols.  */
 220 #ifndef SUPPORTS_WEAK
 221 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
 222 #define SUPPORTS_WEAK 1
 223 #else
 224 #define SUPPORTS_WEAK 0
 225 #endif
 226 #endif
 227
 228 /* This determines whether or not we support link-once semantics.  */
 229 #ifndef SUPPORTS_ONE_ONLY
 230 #ifdef MAKE_DECL_ONE_ONLY
 231 #define SUPPORTS_ONE_ONLY 1
 232 #else
 233 #define SUPPORTS_ONE_ONLY 0
 234 #endif
 235 #endif
 236
 237 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
 238    provide a weak attribute.  Else define it to nothing.
 239
 240    This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
 241    not available at that time.
 242
 243    Note, this is only for use by target files which we know are to be
 244    compiled by GCC.  */
 245 #ifndef TARGET_ATTRIBUTE_WEAK
 246 # if SUPPORTS_WEAK
 247 #  define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
 248 # else
 249 #  define TARGET_ATTRIBUTE_WEAK
 250 # endif
 251 #endif
 252
 253 /* If the target supports init_priority C++ attribute, give
 254    SUPPORTS_INIT_PRIORITY a nonzero value.  */
 255 #ifndef SUPPORTS_INIT_PRIORITY
 256 #define SUPPORTS_INIT_PRIORITY 1
 257 #endif /* SUPPORTS_INIT_PRIORITY */
 258
 259 /* If duplicate library search directories can be removed from a
 260    linker command without changing the linker's semantics, give this
 261    symbol a nonzero.  */
 262 #ifndef LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
 263 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 0
 264 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
 265
 266 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
 267    the rest of the DWARF 2 frame unwind support is also provided.  */
 268 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
 269 #define DWARF2_UNWIND_INFO 1
 270 #endif
 271
 272 /* If we have named sections, and we're using crtstuff to run ctors,
 273    use them for registering eh frame information.  */
 274 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
 275     && !defined(EH_FRAME_IN_DATA_SECTION)
 276 #ifndef EH_FRAME_SECTION_NAME
 277 #define EH_FRAME_SECTION_NAME ".eh_frame"
 278 #endif
 279 #endif
 280
 281 /* If we have named section and we support weak symbols, then use the
 282    .jcr section for recording java classes which need to be registered
 283    at program start-up time.  */
 284 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
 285 #ifndef JCR_SECTION_NAME
 286 #define JCR_SECTION_NAME ".jcr"
 287 #endif
 288 #endif
 289
 290 /* By default, we generate a label at the beginning and end of the
 291    text section, and compute the size of the text section by
 292    subtracting the two.  However, on some platforms that doesn't
 293    work, and we use the section itself, rather than a label at the
 294    beginning of it, to indicate the start of the section.  On such
 295    platforms, define this to zero.  */
 296 #ifndef DWARF2_GENERATE_TEXT_SECTION_LABEL
 297 #define DWARF2_GENERATE_TEXT_SECTION_LABEL 1
 298 #endif
 299
 300 /* Supply a default definition for PROMOTE_PROTOTYPES.  */
 301 #ifndef PROMOTE_PROTOTYPES
 302 #define PROMOTE_PROTOTYPES      0
 303 #endif
 304
 305 /* Number of hardware registers that go into the DWARF-2 unwind info.
 306    If not defined, equals FIRST_PSEUDO_REGISTER  */
 307
 308 #ifndef DWARF_FRAME_REGISTERS
 309 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
 310 #endif
 311
 312 /* How to renumber registers for dbx and gdb.  If not defined, assume
 313    no renumbering is necessary.  */
 314
 315 #ifndef DBX_REGISTER_NUMBER
 316 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 317 #endif
 318
 319 /* Default sizes for base C types.  If the sizes are different for
 320    your target, you should override these values by defining the
 321    appropriate symbols in your tm.h file.  */
 322
 323 #ifndef BITS_PER_UNIT
 324 #define BITS_PER_UNIT 8
 325 #endif
 326
 327 #ifndef BITS_PER_WORD
 328 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
 329 #endif
 330
 331 #ifndef CHAR_TYPE_SIZE
 332 #define CHAR_TYPE_SIZE BITS_PER_UNIT
 333 #endif
 334
 335 #ifndef BOOL_TYPE_SIZE
 336 /* `bool' has size and alignment `1', on almost all platforms.  */
 337 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
 338 #endif
 339
 340 #ifndef SHORT_TYPE_SIZE
 341 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
 342 #endif
 343
 344 #ifndef INT_TYPE_SIZE
 345 #define INT_TYPE_SIZE BITS_PER_WORD
 346 #endif
 347
 348 #ifndef LONG_TYPE_SIZE
 349 #define LONG_TYPE_SIZE BITS_PER_WORD
 350 #endif
 351
 352 #ifndef LONG_LONG_TYPE_SIZE
 353 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
 354 #endif
 355
 356 #ifndef WCHAR_TYPE_SIZE
 357 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
 358 #endif
 359
 360 #ifndef FLOAT_TYPE_SIZE
 361 #define FLOAT_TYPE_SIZE BITS_PER_WORD
 362 #endif
 363
 364 #ifndef DOUBLE_TYPE_SIZE
 365 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 366 #endif
 367
 368 #ifndef LONG_DOUBLE_TYPE_SIZE
 369 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 370 #endif
 371
 372 /* Width in bits of a pointer.  Mind the value of the macro `Pmode'.  */
 373 #ifndef POINTER_SIZE
 374 #define POINTER_SIZE BITS_PER_WORD
 375 #endif
 376
 377 #ifndef BUILD_VA_LIST_TYPE
 378 #define BUILD_VA_LIST_TYPE(X) ((X) = ptr_type_node)
 379 #endif
 380
 381 #ifndef PIC_OFFSET_TABLE_REGNUM
 382 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
 383 #endif
 384
 385 /* Type used by GCOV counters.  Use 64bit data type if target supports
 386    it.  */
 387 #if LONG_TYPE_SIZE >= 64
 388 #define GCOV_TYPE_SIZE LONG_TYPE_SIZE
 389 #else
 390 #define GCOV_TYPE_SIZE LONG_LONG_TYPE_SIZE
 391 #endif
 392
 393
 394 /* By default, the preprocessor should be invoked the same way in C++
 395    as in C.  */
 396 #ifndef CPLUSPLUS_CPP_SPEC
 397 #ifdef CPP_SPEC
 398 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
 399 #endif
 400 #endif
 401
 402 #ifndef ACCUMULATE_OUTGOING_ARGS
 403 #define ACCUMULATE_OUTGOING_ARGS 0
 404 #endif
 405
 406 /* Supply a default definition for PUSH_ARGS.  */
 407 #ifndef PUSH_ARGS
 408 #ifdef PUSH_ROUNDING
 409 #define PUSH_ARGS       !ACCUMULATE_OUTGOING_ARGS
 410 #else
 411 #define PUSH_ARGS       0
 412 #endif
 413 #endif
 414
 415 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
 416    STACK_BOUNDARY is required.  */
 417 #ifndef PREFERRED_STACK_BOUNDARY
 418 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
 419 #endif
 420
 421 /* By default, the C++ compiler will use function addresses in the
 422    vtable entries.  Setting this non-zero tells the compiler to use
 423    function descriptors instead.  The value of this macro says how
 424    many words wide the descriptor is (normally 2).  It is assumed
 425    that the address of a function descriptor may be treated as a
 426    pointer to a function.  */
 427 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
 428 #define TARGET_VTABLE_USES_DESCRIPTORS 0
 429 #endif
 430
 431 /* By default, the vtable entries are void pointers, the so the alignment
 432    is the same as pointer alignment.  The value of this macro specifies
 433    the alignment of the vtable entry in bits.  It should be defined only
 434    when special alignment is necessary. */
 435 #ifndef TARGET_VTABLE_ENTRY_ALIGN
 436 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
 437 #endif
 438
 439 /* There are a few non-descriptor entries in the vtable at offsets below
 440    zero.  If these entries must be padded (say, to preserve the alignment
 441    specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
 442    words in each data entry.  */
 443 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
 444 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
 445 #endif
 446
 447 /* Select a format to encode pointers in exception handling data.  We
 448    prefer those that result in fewer dynamic relocations.  Assume no
 449    special support here and encode direct references.  */
 450 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
 451 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  DW_EH_PE_absptr
 452 #endif
 453
 454 /* By default, the C++ compiler will use the lowest bit of the pointer
 455    to function to indicate a pointer-to-member-function points to a
 456    virtual member function.  However, if FUNCTION_BOUNDARY indicates
 457    function addresses aren't always even, the lowest bit of the delta
 458    field will be used.  */
 459 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
 460 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
 461   (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
 462    ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
 463 #endif
 464
 465 #ifndef DEFAULT_GDB_EXTENSIONS
 466 #define DEFAULT_GDB_EXTENSIONS 1
 467 #endif
 468
 469 /* If more than one debugging type is supported, you must define
 470    PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
 471
 472    This is one long line cause VAXC can't handle a \-newline.  */
 473 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) + defined (VMS_DEBUGGING_INFO))
 474 #ifndef PREFERRED_DEBUGGING_TYPE
 475 You Lose!  You must define PREFERRED_DEBUGGING_TYPE!
 476 #endif /* no PREFERRED_DEBUGGING_TYPE */
 477 #else /* Only one debugging format supported.  Define PREFERRED_DEBUGGING_TYPE
 478          so other code needn't care.  */
 479 #ifdef DBX_DEBUGGING_INFO
 480 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 481 #endif
 482 #ifdef SDB_DEBUGGING_INFO
 483 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
 484 #endif
 485 #ifdef DWARF_DEBUGGING_INFO
 486 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
 487 #endif
 488 #ifdef DWARF2_DEBUGGING_INFO
 489 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 490 #endif
 491 #ifdef VMS_DEBUGGING_INFO
 492 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
 493 #endif
 494 #ifdef XCOFF_DEBUGGING_INFO
 495 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
 496 #endif
 497 #endif /* More than one debugger format enabled.  */
 498
 499 /* If still not defined, must have been because no debugging formats
 500    are supported.  */
 501 #ifndef PREFERRED_DEBUGGING_TYPE
 502 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
 503 #endif
 504
 505 /* This is set to 1 if BYTES_BIG_ENDIAN is defined but the target uses a
 506    little-endian method of passing and returning structures in registers.
 507    On the HP-UX IA64 and PA64 platforms structures are aligned differently
 508    then integral values and setting this value to 1 will allow for the
 509    special handling of structure arguments and return values in regs.  */
 510
 511 #ifndef FUNCTION_ARG_REG_LITTLE_ENDIAN
 512 #define FUNCTION_ARG_REG_LITTLE_ENDIAN 0
 513 #endif
 514
 515 /* Determine the register class for registers suitable to be the base
 516    address register in a MEM.  Allow the choice to be dependent upon
 517    the mode of the memory access.  */
 518 #ifndef MODE_BASE_REG_CLASS
 519 #define MODE_BASE_REG_CLASS(MODE) BASE_REG_CLASS
 520 #endif
 521
 522 #ifndef LARGEST_EXPONENT_IS_NORMAL
 523 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
 524 #endif
 525
 526 #ifndef ROUND_TOWARDS_ZERO
 527 #define ROUND_TOWARDS_ZERO 0
 528 #endif
 529
 530 #ifndef MODE_HAS_NANS
 531 #define MODE_HAS_NANS(MODE)                                     \
 532   (FLOAT_MODE_P (MODE)                                          \
 533    && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT                  \
 534    && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
 535 #endif
 536
 537 #ifndef MODE_HAS_INFINITIES
 538 #define MODE_HAS_INFINITIES(MODE)                               \
 539   (FLOAT_MODE_P (MODE)                                          \
 540    && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT                  \
 541    && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
 542 #endif
 543
 544 #ifndef MODE_HAS_SIGNED_ZEROS
 545 #define MODE_HAS_SIGNED_ZEROS(MODE) \
 546   (FLOAT_MODE_P (MODE) && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT)
 547 #endif
 548
 549 #ifndef MODE_HAS_SIGN_DEPENDENT_ROUNDING
 550 #define MODE_HAS_SIGN_DEPENDENT_ROUNDING(MODE)                  \
 551   (FLOAT_MODE_P (MODE)                                          \
 552    && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT                  \
 553    && !ROUND_TOWARDS_ZERO)
 554 #endif
 555
 556 #ifndef HOT_TEXT_SECTION_NAME
 557 #define HOT_TEXT_SECTION_NAME "text.hot"
 558 #endif
 559
 560 #ifndef UNLIKELY_EXECUTED_TEXT_SECTION_NAME
 561 #define UNLIKELY_EXECUTED_TEXT_SECTION_NAME "text.unlikely"
 562 #endif
 563
 564 #ifndef VECTOR_MODE_SUPPORTED_P
 565 #define VECTOR_MODE_SUPPORTED_P(MODE) 0
 566 #endif
 567
 568 /* Determine whether __cxa_atexit, rather than atexit, is used to
 569    register C++ destructors for local statics and global objects. */
 570 #ifndef DEFAULT_USE_CXA_ATEXIT
 571 #define DEFAULT_USE_CXA_ATEXIT 0
 572 #endif
 573
 574 #endif  /* ! GCC_DEFAULTS_H */