contrib/gcc-3.4/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    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     ((void *(*) (long)) xmalloc)
  31 #define obstack_chunk_free      ((void (*) (void *)) free)
  32 #define OBSTACK_CHUNK_SIZE      0
  33 #define gcc_obstack_init(OBSTACK)                       \
  34   _obstack_begin ((OBSTACK), OBSTACK_CHUNK_SIZE, 0,     \
  35                   obstack_chunk_alloc,                  \
  36                   obstack_chunk_free)
  37
  38 /* Define default standard character escape sequences.  */
  39 #ifndef TARGET_BELL
  40 #  define TARGET_BELL 007
  41 #  define TARGET_BS 010
  42 #  define TARGET_TAB 011
  43 #  define TARGET_NEWLINE 012
  44 #  define TARGET_VT 013
  45 #  define TARGET_FF 014
  46 #  define TARGET_CR 015
  47 #  define TARGET_ESC 033
  48 #endif
  49
  50 /* Store in OUTPUT a string (made with alloca) containing an
  51    assembler-name for a local static variable or function named NAME.
  52    LABELNO is an integer which is different for each call.  */
  53
  54 #ifndef ASM_PN_FORMAT
  55 # ifndef NO_DOT_IN_LABEL
  56 #  define ASM_PN_FORMAT "%s.%lu"
  57 # else
  58 #  ifndef NO_DOLLAR_IN_LABEL
  59 #   define ASM_PN_FORMAT "%s$%lu"
  60 #  else
  61 #   define ASM_PN_FORMAT "__%s_%lu"
  62 #  endif
  63 # endif
  64 #endif /* ! ASM_PN_FORMAT */
  65
  66 #ifndef ASM_FORMAT_PRIVATE_NAME
  67 # define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
  68   do { const char *const name_ = (NAME); \
  69        char *const output_ = (OUTPUT) = alloca (strlen (name_) + 32);\
  70        sprintf (output_, ASM_PN_FORMAT, name_, (unsigned long)(LABELNO)); \
  71   } while (0)
  72 #endif
  73
  74 #ifndef ASM_STABD_OP
  75 #define ASM_STABD_OP "\t.stabd\t"
  76 #endif
  77
  78 /* This is how to output an element of a case-vector that is absolute.
  79    Some targets don't use this, but we have to define it anyway.  */
  80
  81 #ifndef ASM_OUTPUT_ADDR_VEC_ELT
  82 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
  83 do { fputs (integer_asm_op (POINTER_SIZE / UNITS_PER_WORD, TRUE), FILE); \
  84      (*targetm.asm_out.internal_label) (FILE, "L", (VALUE));                    \
  85      fputc ('\n', FILE);                                                \
  86    } while (0)
  87 #endif
  88
  89 /* Choose a reasonable default for ASM_OUTPUT_ASCII.  */
  90
  91 #ifndef ASM_OUTPUT_ASCII
  92 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
  93   do {                                                                        \
  94     FILE *_hide_asm_out_file = (MYFILE);                                      \
  95     const unsigned char *_hide_p = (const unsigned char *) (MYSTRING);        \
  96     int _hide_thissize = (MYLENGTH);                                          \
  97     {                                                                         \
  98       FILE *asm_out_file = _hide_asm_out_file;                                \
  99       const unsigned char *p = _hide_p;                                       \
 100       int thissize = _hide_thissize;                                          \
 101       int i;                                                                  \
 102       fprintf (asm_out_file, "\t.ascii \"");                                  \
 103                                                                               \
 104       for (i = 0; i < thissize; i++)                                          \
 105         {                                                                     \
 106           int c = p[i];                                                       \
 107           if (c == '\"' || c == '\\')                                         \
 108             putc ('\\', asm_out_file);                                        \
 109           if (ISPRINT(c))                                                     \
 110             putc (c, asm_out_file);                                           \
 111           else                                                                \
 112             {                                                                 \
 113               fprintf (asm_out_file, "\\%o", c);                              \
 114               /* After an octal-escape, if a digit follows,                   \
 115                  terminate one string constant and start another.             \
 116                  The VAX assembler fails to stop reading the escape           \
 117                  after three digits, so this is the only way we               \
 118                  can get it to parse the data properly.  */                   \
 119               if (i < thissize - 1 && ISDIGIT(p[i + 1]))                      \
 120                 fprintf (asm_out_file, "\"\n\t.ascii \"");                    \
 121           }                                                                   \
 122         }                                                                     \
 123       fprintf (asm_out_file, "\"\n");                                         \
 124     }                                                                         \
 125   }                                                                           \
 126   while (0)
 127 #endif
 128
 129 /* This is how we tell the assembler to equate two values.  */
 130 #ifdef SET_ASM_OP
 131 #ifndef ASM_OUTPUT_DEF
 132 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
 133  do {   fprintf ((FILE), "%s", SET_ASM_OP);                             \
 134         assemble_name (FILE, LABEL1);                                   \
 135         fprintf (FILE, ",");                                            \
 136         assemble_name (FILE, LABEL2);                                   \
 137         fprintf (FILE, "\n");                                           \
 138   } while (0)
 139 #endif
 140 #endif
 141
 142 /* Decide whether to defer emitting the assembler output for an equate
 143    of two values.  The default is to not defer output.  */
 144 #ifndef TARGET_DEFERRED_OUTPUT_DEFS
 145 #define TARGET_DEFERRED_OUTPUT_DEFS(DECL,TARGET) false
 146 #endif
 147
 148 /* This is how to output the definition of a user-level label named
 149    NAME, such as the label on a static function or variable NAME.  */
 150
 151 #ifndef ASM_OUTPUT_LABEL
 152 #define ASM_OUTPUT_LABEL(FILE,NAME) \
 153   do { assemble_name ((FILE), (NAME)); fputs (":\n", (FILE)); } while (0)
 154 #endif
 155
 156 /* This is how to output a reference to a user-level label named NAME.  */
 157
 158 #ifndef ASM_OUTPUT_LABELREF
 159 #define ASM_OUTPUT_LABELREF(FILE,NAME)  asm_fprintf ((FILE), "%U%s", (NAME))
 160 #endif
 161
 162 /* Allow target to print debug info labels specially.  This is useful for
 163    VLIW targets, since debug info labels should go into the middle of
 164    instruction bundles instead of breaking them.  */
 165
 166 #ifndef ASM_OUTPUT_DEBUG_LABEL
 167 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
 168   (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM)
 169 #endif
 170
 171 /* This is how we tell the assembler that a symbol is weak.  */
 172 #ifndef ASM_OUTPUT_WEAK_ALIAS
 173 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
 174 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE)      \
 175   do                                                    \
 176     {                                                   \
 177       ASM_WEAKEN_LABEL (STREAM, NAME);                  \
 178       if (VALUE)                                        \
 179         ASM_OUTPUT_DEF (STREAM, NAME, VALUE);           \
 180     }                                                   \
 181   while (0)
 182 #endif
 183 #endif
 184
 185 /* How to emit a .type directive.  */
 186 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE
 187 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT
 188 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE)   \
 189   do                                                    \
 190     {                                                   \
 191       fputs (TYPE_ASM_OP, STREAM);                      \
 192       assemble_name (STREAM, NAME);                     \
 193       fputs (", ", STREAM);                             \
 194       fprintf (STREAM, TYPE_OPERAND_FMT, TYPE);         \
 195       putc ('\n', STREAM);                              \
 196     }                                                   \
 197   while (0)
 198 #endif
 199 #endif
 200
 201 /* How to emit a .size directive.  */
 202 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE
 203 #ifdef SIZE_ASM_OP
 204 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE)   \
 205   do                                                    \
 206     {                                                   \
 207       HOST_WIDE_INT size_ = (SIZE);                     \
 208       fputs (SIZE_ASM_OP, STREAM);                      \
 209       assemble_name (STREAM, NAME);                     \
 210       fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \
 211     }                                                   \
 212   while (0)
 213
 214 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME)          \
 215   do                                                    \
 216     {                                                   \
 217       fputs (SIZE_ASM_OP, STREAM);                      \
 218       assemble_name (STREAM, NAME);                     \
 219       fputs (", .-", STREAM);                           \
 220       assemble_name (STREAM, NAME);                     \
 221       putc ('\n', STREAM);                              \
 222     }                                                   \
 223   while (0)
 224
 225 #endif
 226 #endif
 227
 228 /* This determines whether or not we support weak symbols.  */
 229 #ifndef SUPPORTS_WEAK
 230 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
 231 #define SUPPORTS_WEAK 1
 232 #else
 233 #define SUPPORTS_WEAK 0
 234 #endif
 235 #endif
 236
 237 /* This determines whether or not we support link-once semantics.  */
 238 #ifndef SUPPORTS_ONE_ONLY
 239 #ifdef MAKE_DECL_ONE_ONLY
 240 #define SUPPORTS_ONE_ONLY 1
 241 #else
 242 #define SUPPORTS_ONE_ONLY 0
 243 #endif
 244 #endif
 245
 246 /* By default, there is no prefix on user-defined symbols.  */
 247 #ifndef USER_LABEL_PREFIX
 248 #define USER_LABEL_PREFIX ""
 249 #endif
 250
 251 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
 252    provide a weak attribute.  Else define it to nothing.
 253
 254    This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
 255    not available at that time.
 256
 257    Note, this is only for use by target files which we know are to be
 258    compiled by GCC.  */
 259 #ifndef TARGET_ATTRIBUTE_WEAK
 260 # if SUPPORTS_WEAK
 261 #  define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
 262 # else
 263 #  define TARGET_ATTRIBUTE_WEAK
 264 # endif
 265 #endif
 266
 267 /* If the target supports init_priority C++ attribute, give
 268    SUPPORTS_INIT_PRIORITY a nonzero value.  */
 269 #ifndef SUPPORTS_INIT_PRIORITY
 270 #define SUPPORTS_INIT_PRIORITY 1
 271 #endif /* SUPPORTS_INIT_PRIORITY */
 272
 273 /* If duplicate library search directories can be removed from a
 274    linker command without changing the linker's semantics, give this
 275    symbol a nonzero.  */
 276 #ifndef LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
 277 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 0
 278 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
 279
 280 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
 281    the rest of the DWARF 2 frame unwind support is also provided.  */
 282 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
 283 #define DWARF2_UNWIND_INFO 1
 284 #endif
 285
 286 /* If we have named sections, and we're using crtstuff to run ctors,
 287    use them for registering eh frame information.  */
 288 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
 289     && !defined(EH_FRAME_IN_DATA_SECTION)
 290 #ifndef EH_FRAME_SECTION_NAME
 291 #define EH_FRAME_SECTION_NAME ".eh_frame"
 292 #endif
 293 #endif
 294
 295 /* If we have named section and we support weak symbols, then use the
 296    .jcr section for recording java classes which need to be registered
 297    at program start-up time.  */
 298 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
 299 #ifndef JCR_SECTION_NAME
 300 #define JCR_SECTION_NAME ".jcr"
 301 #endif
 302 #endif
 303
 304 /* By default, we generate a label at the beginning and end of the
 305    text section, and compute the size of the text section by
 306    subtracting the two.  However, on some platforms that doesn't
 307    work, and we use the section itself, rather than a label at the
 308    beginning of it, to indicate the start of the section.  On such
 309    platforms, define this to zero.  */
 310 #ifndef DWARF2_GENERATE_TEXT_SECTION_LABEL
 311 #define DWARF2_GENERATE_TEXT_SECTION_LABEL 1
 312 #endif
 313
 314 /* Supply a default definition for PROMOTE_PROTOTYPES.  */
 315 #ifndef PROMOTE_PROTOTYPES
 316 #define PROMOTE_PROTOTYPES      0
 317 #endif
 318
 319 /* Number of hardware registers that go into the DWARF-2 unwind info.
 320    If not defined, equals FIRST_PSEUDO_REGISTER  */
 321
 322 #ifndef DWARF_FRAME_REGISTERS
 323 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
 324 #endif
 325
 326 /* How to renumber registers for dbx and gdb.  If not defined, assume
 327    no renumbering is necessary.  */
 328
 329 #ifndef DBX_REGISTER_NUMBER
 330 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 331 #endif
 332
 333 /* Default sizes for base C types.  If the sizes are different for
 334    your target, you should override these values by defining the
 335    appropriate symbols in your tm.h file.  */
 336
 337 #ifndef BITS_PER_UNIT
 338 #define BITS_PER_UNIT 8
 339 #endif
 340
 341 #ifndef BITS_PER_WORD
 342 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
 343 #endif
 344
 345 #ifndef CHAR_TYPE_SIZE
 346 #define CHAR_TYPE_SIZE BITS_PER_UNIT
 347 #endif
 348
 349 #ifndef BOOL_TYPE_SIZE
 350 /* `bool' has size and alignment `1', on almost all platforms.  */
 351 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
 352 #endif
 353
 354 #ifndef SHORT_TYPE_SIZE
 355 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
 356 #endif
 357
 358 #ifndef INT_TYPE_SIZE
 359 #define INT_TYPE_SIZE BITS_PER_WORD
 360 #endif
 361
 362 #ifndef LONG_TYPE_SIZE
 363 #define LONG_TYPE_SIZE BITS_PER_WORD
 364 #endif
 365
 366 #ifndef LONG_LONG_TYPE_SIZE
 367 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
 368 #endif
 369
 370 #ifndef WCHAR_TYPE_SIZE
 371 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
 372 #endif
 373
 374 #ifndef FLOAT_TYPE_SIZE
 375 #define FLOAT_TYPE_SIZE BITS_PER_WORD
 376 #endif
 377
 378 #ifndef DOUBLE_TYPE_SIZE
 379 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 380 #endif
 381
 382 #ifndef LONG_DOUBLE_TYPE_SIZE
 383 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 384 #endif
 385
 386 /* Width in bits of a pointer.  Mind the value of the macro `Pmode'.  */
 387 #ifndef POINTER_SIZE
 388 #define POINTER_SIZE BITS_PER_WORD
 389 #endif
 390
 391 #ifndef PIC_OFFSET_TABLE_REGNUM
 392 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
 393 #endif
 394
 395 /* By default, the preprocessor should be invoked the same way in C++
 396    as in C.  */
 397 #ifndef CPLUSPLUS_CPP_SPEC
 398 #ifdef CPP_SPEC
 399 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
 400 #endif
 401 #endif
 402
 403 #ifndef ACCUMULATE_OUTGOING_ARGS
 404 #define ACCUMULATE_OUTGOING_ARGS 0
 405 #endif
 406
 407 /* Supply a default definition for PUSH_ARGS.  */
 408 #ifndef PUSH_ARGS
 409 #ifdef PUSH_ROUNDING
 410 #define PUSH_ARGS       !ACCUMULATE_OUTGOING_ARGS
 411 #else
 412 #define PUSH_ARGS       0
 413 #endif
 414 #endif
 415
 416 /* Decide whether a function's arguments should be processed
 417    from first to last or from last to first.
 418
 419    They should if the stack and args grow in opposite directions, but
 420    only if we have push insns.  */
 421
 422 #ifdef PUSH_ROUNDING
 423
 424 #ifndef PUSH_ARGS_REVERSED
 425 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
 426 #define PUSH_ARGS_REVERSED  PUSH_ARGS
 427 #endif
 428 #endif
 429
 430 #endif
 431
 432 #ifndef PUSH_ARGS_REVERSED
 433 #define PUSH_ARGS_REVERSED 0
 434 #endif
 435
 436 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
 437    STACK_BOUNDARY is required.  */
 438 #ifndef PREFERRED_STACK_BOUNDARY
 439 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
 440 #endif
 441
 442 /* By default, the C++ compiler will use function addresses in the
 443    vtable entries.  Setting this nonzero tells the compiler to use
 444    function descriptors instead.  The value of this macro says how
 445    many words wide the descriptor is (normally 2).  It is assumed
 446    that the address of a function descriptor may be treated as a
 447    pointer to a function.  */
 448 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
 449 #define TARGET_VTABLE_USES_DESCRIPTORS 0
 450 #endif
 451
 452 /* By default, the vtable entries are void pointers, the so the alignment
 453    is the same as pointer alignment.  The value of this macro specifies
 454    the alignment of the vtable entry in bits.  It should be defined only
 455    when special alignment is necessary.  */
 456 #ifndef TARGET_VTABLE_ENTRY_ALIGN
 457 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
 458 #endif
 459
 460 /* There are a few non-descriptor entries in the vtable at offsets below
 461    zero.  If these entries must be padded (say, to preserve the alignment
 462    specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
 463    words in each data entry.  */
 464 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
 465 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
 466 #endif
 467
 468 /* Select a format to encode pointers in exception handling data.  We
 469    prefer those that result in fewer dynamic relocations.  Assume no
 470    special support here and encode direct references.  */
 471 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
 472 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  DW_EH_PE_absptr
 473 #endif
 474
 475 /* By default, the C++ compiler will use the lowest bit of the pointer
 476    to function to indicate a pointer-to-member-function points to a
 477    virtual member function.  However, if FUNCTION_BOUNDARY indicates
 478    function addresses aren't always even, the lowest bit of the delta
 479    field will be used.  */
 480 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
 481 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
 482   (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
 483    ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
 484 #endif
 485
 486 #ifndef DEFAULT_GDB_EXTENSIONS
 487 #define DEFAULT_GDB_EXTENSIONS 1
 488 #endif
 489
 490 /* If more than one debugging type is supported, you must define
 491    PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
 492
 493    This is one long line cause VAXC can't handle a \-newline.  */
 494 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) + defined (VMS_DEBUGGING_INFO))
 495 #ifndef PREFERRED_DEBUGGING_TYPE
 496 You Lose!  You must define PREFERRED_DEBUGGING_TYPE!
 497 #endif /* no PREFERRED_DEBUGGING_TYPE */
 498 #else /* Only one debugging format supported.  Define PREFERRED_DEBUGGING_TYPE
 499          so other code needn't care.  */
 500 #ifdef DBX_DEBUGGING_INFO
 501 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 502 #endif
 503 #ifdef SDB_DEBUGGING_INFO
 504 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
 505 #endif
 506 #ifdef DWARF_DEBUGGING_INFO
 507 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
 508 #endif
 509 #ifdef DWARF2_DEBUGGING_INFO
 510 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 511 #endif
 512 #ifdef VMS_DEBUGGING_INFO
 513 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
 514 #endif
 515 #ifdef XCOFF_DEBUGGING_INFO
 516 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
 517 #endif
 518 #endif /* More than one debugger format enabled.  */
 519
 520 /* If still not defined, must have been because no debugging formats
 521    are supported.  */
 522 #ifndef PREFERRED_DEBUGGING_TYPE
 523 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
 524 #endif
 525
 526 /* Define codes for all the float formats that we know of.  */
 527 #define UNKNOWN_FLOAT_FORMAT 0
 528 #define IEEE_FLOAT_FORMAT 1
 529 #define VAX_FLOAT_FORMAT 2
 530 #define IBM_FLOAT_FORMAT 3
 531 #define C4X_FLOAT_FORMAT 4
 532
 533 /* Default to IEEE float if not specified.  Nearly all machines use it.  */
 534 #ifndef TARGET_FLOAT_FORMAT
 535 #define TARGET_FLOAT_FORMAT     IEEE_FLOAT_FORMAT
 536 #endif
 537
 538 /* Determine the register class for registers suitable to be the base
 539    address register in a MEM.  Allow the choice to be dependent upon
 540    the mode of the memory access.  */
 541 #ifndef MODE_BASE_REG_CLASS
 542 #define MODE_BASE_REG_CLASS(MODE) BASE_REG_CLASS
 543 #endif
 544
 545 #ifndef LARGEST_EXPONENT_IS_NORMAL
 546 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
 547 #endif
 548
 549 #ifndef ROUND_TOWARDS_ZERO
 550 #define ROUND_TOWARDS_ZERO 0
 551 #endif
 552
 553 #ifndef MODE_HAS_NANS
 554 #define MODE_HAS_NANS(MODE)                                     \
 555   (FLOAT_MODE_P (MODE)                                          \
 556    && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT                  \
 557    && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
 558 #endif
 559
 560 #ifndef MODE_HAS_INFINITIES
 561 #define MODE_HAS_INFINITIES(MODE)                               \
 562   (FLOAT_MODE_P (MODE)                                          \
 563    && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT                  \
 564    && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
 565 #endif
 566
 567 #ifndef MODE_HAS_SIGNED_ZEROS
 568 #define MODE_HAS_SIGNED_ZEROS(MODE) \
 569   (FLOAT_MODE_P (MODE) && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT)
 570 #endif
 571
 572 #ifndef MODE_HAS_SIGN_DEPENDENT_ROUNDING
 573 #define MODE_HAS_SIGN_DEPENDENT_ROUNDING(MODE)                  \
 574   (FLOAT_MODE_P (MODE)                                          \
 575    && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT                  \
 576    && !ROUND_TOWARDS_ZERO)
 577 #endif
 578
 579 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
 580 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
 581 #endif
 582
 583 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
 584    then the word-endianness is the same as for integers.  */
 585 #ifndef FLOAT_WORDS_BIG_ENDIAN
 586 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 587 #endif
 588
 589 #ifndef TARGET_FLT_EVAL_METHOD
 590 #define TARGET_FLT_EVAL_METHOD 0
 591 #endif
 592
 593 #ifndef HOT_TEXT_SECTION_NAME
 594 #define HOT_TEXT_SECTION_NAME "text.hot"
 595 #endif
 596
 597 #ifndef UNLIKELY_EXECUTED_TEXT_SECTION_NAME
 598 #define UNLIKELY_EXECUTED_TEXT_SECTION_NAME "text.unlikely"
 599 #endif
 600
 601 #ifndef VECTOR_MODE_SUPPORTED_P
 602 #define VECTOR_MODE_SUPPORTED_P(MODE) 0
 603 #endif
 604
 605 /* Determine whether __cxa_atexit, rather than atexit, is used to
 606    register C++ destructors for local statics and global objects.  */
 607 #ifndef DEFAULT_USE_CXA_ATEXIT
 608 #define DEFAULT_USE_CXA_ATEXIT 0
 609 #endif
 610
 611 /* Determine whether extra constraint letter should be handled
 612    via address reload (like 'o').  */
 613 #ifndef EXTRA_MEMORY_CONSTRAINT
 614 #define EXTRA_MEMORY_CONSTRAINT(C,STR) 0
 615 #endif
 616
 617 /* Determine whether extra constraint letter should be handled
 618    as an address (like 'p').  */
 619 #ifndef EXTRA_ADDRESS_CONSTRAINT
 620 #define EXTRA_ADDRESS_CONSTRAINT(C,STR) 0
 621 #endif
 622
 623 /* When a port defines CONSTRAINT_LEN, it should use DEFAULT_CONSTRAINT_LEN
 624    for all the characters that it does not want to change, so things like the
 625   'length' of a digit in a matching constraint is an implementation detail,
 626    and not part of the interface.  */
 627 #define DEFAULT_CONSTRAINT_LEN(C,STR) 1
 628
 629 #ifndef CONSTRAINT_LEN
 630 #define CONSTRAINT_LEN(C,STR) DEFAULT_CONSTRAINT_LEN (C, STR)
 631 #endif
 632
 633 #if defined (CONST_OK_FOR_LETTER_P) && ! defined (CONST_OK_FOR_CONSTRAINT_P)
 634 #define CONST_OK_FOR_CONSTRAINT_P(VAL,C,STR) CONST_OK_FOR_LETTER_P (VAL, C)
 635 #endif
 636
 637 #if defined (CONST_DOUBLE_OK_FOR_LETTER_P) && ! defined (CONST_DOUBLE_OK_FOR_CONSTRAINT_P)
 638 #define CONST_DOUBLE_OK_FOR_CONSTRAINT_P(OP,C,STR) \
 639   CONST_DOUBLE_OK_FOR_LETTER_P (OP, C)
 640 #endif
 641
 642 #ifndef REG_CLASS_FROM_CONSTRAINT
 643 #define REG_CLASS_FROM_CONSTRAINT(C,STR) REG_CLASS_FROM_LETTER (C)
 644 #endif
 645
 646 #if defined (EXTRA_CONSTRAINT) && ! defined (EXTRA_CONSTRAINT_STR)
 647 #define EXTRA_CONSTRAINT_STR(OP, C,STR) EXTRA_CONSTRAINT (OP, C)
 648 #endif
 649
 650 #ifndef REGISTER_MOVE_COST
 651 #define REGISTER_MOVE_COST(m, x, y) 2
 652 #endif
 653
 654 /* Determine whether the the entire c99 runtime
 655    is present in the runtime library.  */
 656 #ifndef TARGET_C99_FUNCTIONS
 657 #define TARGET_C99_FUNCTIONS 0
 658 #endif
 659
 660 /* Indicate that CLZ and CTZ are undefined at zero.  */
 661 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
 662 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
 663 #endif
 664 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
 665 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
 666 #endif
 667
 668 /* Provide a default value for STORE_FLAG_VALUE.  */
 669 #ifndef STORE_FLAG_VALUE
 670 #define STORE_FLAG_VALUE  1
 671 #endif
 672
 673 /* This macro is used to determine what the largest unit size that
 674    move_by_pieces can use is.  */
 675
 676 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
 677    move efficiently, as opposed to  MOVE_MAX which is the maximum
 678    number of bytes we can move with a single instruction.  */
 679
 680 #ifndef MOVE_MAX_PIECES
 681 #define MOVE_MAX_PIECES   MOVE_MAX
 682 #endif
 683
 684 #ifndef STACK_POINTER_OFFSET
 685 #define STACK_POINTER_OFFSET    0
 686 #endif
 687
 688 #ifndef LOCAL_REGNO
 689 #define LOCAL_REGNO(REGNO)  0
 690 #endif
 691
 692 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
 693    the stack pointer does not matter.  The value is tested only in
 694    functions that have frame pointers.  */
 695 #ifndef EXIT_IGNORE_STACK
 696 #define EXIT_IGNORE_STACK 0
 697 #endif
 698
 699 #endif  /* ! GCC_DEFAULTS_H */