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, 2012
   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 /* By default we can assume that all global symbols are in one namespace,
 336    across all shared libraries.  */
 337 #ifndef MULTIPLE_SYMBOL_SPACES
 338 # define MULTIPLE_SYMBOL_SPACES 0
 339 #endif
 340
 341 /* If the target supports init_priority C++ attribute, give
 342    SUPPORTS_INIT_PRIORITY a nonzero value.  */
 343 #ifndef SUPPORTS_INIT_PRIORITY
 344 #define SUPPORTS_INIT_PRIORITY 1
 345 #endif /* SUPPORTS_INIT_PRIORITY */
 346
 347 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
 348    the rest of the DWARF 2 frame unwind support is also provided.  */
 349 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
 350 #define DWARF2_UNWIND_INFO 1
 351 #endif
 352
 353 /* If we have named sections, and we're using crtstuff to run ctors,
 354    use them for registering eh frame information.  */
 355 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
 356     && !defined(EH_FRAME_IN_DATA_SECTION)
 357 #ifndef EH_FRAME_SECTION_NAME
 358 #define EH_FRAME_SECTION_NAME ".eh_frame"
 359 #endif
 360 #endif
 361
 362 /* On many systems, different EH table encodings are used under
 363    difference circumstances.  Some will require runtime relocations;
 364    some will not.  For those that do not require runtime relocations,
 365    we would like to make the table read-only.  However, since the
 366    read-only tables may need to be combined with read-write tables
 367    that do require runtime relocation, it is not safe to make the
 368    tables read-only unless the linker will merge read-only and
 369    read-write sections into a single read-write section.  If your
 370    linker does not have this ability, but your system is such that no
 371    encoding used with non-PIC code will ever require a runtime
 372    relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in
 373    your target configuration file.  */
 374 #ifndef EH_TABLES_CAN_BE_READ_ONLY
 375 #ifdef HAVE_LD_RO_RW_SECTION_MIXING
 376 #define EH_TABLES_CAN_BE_READ_ONLY 1
 377 #else
 378 #define EH_TABLES_CAN_BE_READ_ONLY 0
 379 #endif
 380 #endif
 381
 382 /* If we have named section and we support weak symbols, then use the
 383    .jcr section for recording java classes which need to be registered
 384    at program start-up time.  */
 385 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
 386 #ifndef JCR_SECTION_NAME
 387 #define JCR_SECTION_NAME ".jcr"
 388 #endif
 389 #endif
 390
 391 /* This decision to use a .jcr section can be overridden by defining
 392    USE_JCR_SECTION to 0 in target file.  This is necessary if target
 393    can define JCR_SECTION_NAME but does not have crtstuff or
 394    linker support for .jcr section.  */
 395 #ifndef TARGET_USE_JCR_SECTION
 396 #ifdef JCR_SECTION_NAME
 397 #define TARGET_USE_JCR_SECTION 1
 398 #else
 399 #define TARGET_USE_JCR_SECTION 0
 400 #endif
 401 #endif
 402
 403 /* Number of hardware registers that go into the DWARF-2 unwind info.
 404    If not defined, equals FIRST_PSEUDO_REGISTER  */
 405
 406 #ifndef DWARF_FRAME_REGISTERS
 407 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
 408 #endif
 409
 410 /* Offsets recorded in opcodes are a multiple of this alignment factor.  */
 411 #ifndef DWARF_CIE_DATA_ALIGNMENT
 412 #ifdef STACK_GROWS_DOWNWARD
 413 #define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD))
 414 #else
 415 #define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD)
 416 #endif
 417 #endif
 418
 419 /* The DWARF 2 CFA column which tracks the return address.  Normally this
 420    is the column for PC, or the first column after all of the hard
 421    registers.  */
 422 #ifndef DWARF_FRAME_RETURN_COLUMN
 423 #ifdef PC_REGNUM
 424 #define DWARF_FRAME_RETURN_COLUMN       DWARF_FRAME_REGNUM (PC_REGNUM)
 425 #else
 426 #define DWARF_FRAME_RETURN_COLUMN       DWARF_FRAME_REGISTERS
 427 #endif
 428 #endif
 429
 430 /* How to renumber registers for dbx and gdb.  If not defined, assume
 431    no renumbering is necessary.  */
 432
 433 #ifndef DBX_REGISTER_NUMBER
 434 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 435 #endif
 436
 437 /* The mapping from gcc register number to DWARF 2 CFA column number.
 438    By default, we just provide columns for all registers.  */
 439 #ifndef DWARF_FRAME_REGNUM
 440 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
 441 #endif
 442
 443 /* Map register numbers held in the call frame info that gcc has
 444    collected using DWARF_FRAME_REGNUM to those that should be output in
 445    .debug_frame and .eh_frame.  */
 446 #ifndef DWARF2_FRAME_REG_OUT
 447 #define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) (REGNO)
 448 #endif
 449
 450 /* The size of addresses as they appear in the Dwarf 2 data.
 451    Some architectures use word addresses to refer to code locations,
 452    but Dwarf 2 info always uses byte addresses.  On such machines,
 453    Dwarf 2 addresses need to be larger than the architecture's
 454    pointers.  */
 455 #ifndef DWARF2_ADDR_SIZE
 456 #define DWARF2_ADDR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
 457 #endif
 458
 459 /* The size in bytes of a DWARF field indicating an offset or length
 460    relative to a debug info section, specified to be 4 bytes in the
 461    DWARF-2 specification.  The SGI/MIPS ABI defines it to be the same
 462    as PTR_SIZE.  */
 463 #ifndef DWARF_OFFSET_SIZE
 464 #define DWARF_OFFSET_SIZE 4
 465 #endif
 466
 467 /* The size in bytes of a DWARF 4 type signature.  */
 468 #ifndef DWARF_TYPE_SIGNATURE_SIZE
 469 #define DWARF_TYPE_SIGNATURE_SIZE 8
 470 #endif
 471
 472 /* Default sizes for base C types.  If the sizes are different for
 473    your target, you should override these values by defining the
 474    appropriate symbols in your tm.h file.  */
 475
 476 #ifndef BITS_PER_UNIT
 477 #define BITS_PER_UNIT 8
 478 #endif
 479
 480 #ifndef BITS_PER_WORD
 481 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
 482 #endif
 483
 484 #ifndef CHAR_TYPE_SIZE
 485 #define CHAR_TYPE_SIZE BITS_PER_UNIT
 486 #endif
 487
 488 #ifndef BOOL_TYPE_SIZE
 489 /* `bool' has size and alignment `1', on almost all platforms.  */
 490 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
 491 #endif
 492
 493 #ifndef SHORT_TYPE_SIZE
 494 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
 495 #endif
 496
 497 #ifndef INT_TYPE_SIZE
 498 #define INT_TYPE_SIZE BITS_PER_WORD
 499 #endif
 500
 501 #ifndef LONG_TYPE_SIZE
 502 #define LONG_TYPE_SIZE BITS_PER_WORD
 503 #endif
 504
 505 #ifndef LONG_LONG_TYPE_SIZE
 506 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
 507 #endif
 508
 509 #ifndef WCHAR_TYPE_SIZE
 510 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
 511 #endif
 512
 513 #ifndef FLOAT_TYPE_SIZE
 514 #define FLOAT_TYPE_SIZE BITS_PER_WORD
 515 #endif
 516
 517 #ifndef DOUBLE_TYPE_SIZE
 518 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 519 #endif
 520
 521 #ifndef LONG_DOUBLE_TYPE_SIZE
 522 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 523 #endif
 524
 525 #ifndef DECIMAL32_TYPE_SIZE
 526 #define DECIMAL32_TYPE_SIZE 32
 527 #endif
 528
 529 #ifndef DECIMAL64_TYPE_SIZE
 530 #define DECIMAL64_TYPE_SIZE 64
 531 #endif
 532
 533 #ifndef DECIMAL128_TYPE_SIZE
 534 #define DECIMAL128_TYPE_SIZE 128
 535 #endif
 536
 537 #ifndef SHORT_FRACT_TYPE_SIZE
 538 #define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT
 539 #endif
 540
 541 #ifndef FRACT_TYPE_SIZE
 542 #define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2)
 543 #endif
 544
 545 #ifndef LONG_FRACT_TYPE_SIZE
 546 #define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4)
 547 #endif
 548
 549 #ifndef LONG_LONG_FRACT_TYPE_SIZE
 550 #define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8)
 551 #endif
 552
 553 #ifndef SHORT_ACCUM_TYPE_SIZE
 554 #define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2)
 555 #endif
 556
 557 #ifndef ACCUM_TYPE_SIZE
 558 #define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2)
 559 #endif
 560
 561 #ifndef LONG_ACCUM_TYPE_SIZE
 562 #define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2)
 563 #endif
 564
 565 #ifndef LONG_LONG_ACCUM_TYPE_SIZE
 566 #define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2)
 567 #endif
 568
 569 /* We let tm.h override the types used here, to handle trivial differences
 570    such as the choice of unsigned int or long unsigned int for size_t.
 571    When machines start needing nontrivial differences in the size type,
 572    it would be best to do something here to figure out automatically
 573    from other information what type to use.  */
 574
 575 #ifndef SIZE_TYPE
 576 #define SIZE_TYPE "long unsigned int"
 577 #endif
 578
 579 #ifndef SIZETYPE
 580 #define SIZETYPE SIZE_TYPE
 581 #endif
 582
 583 #ifndef PID_TYPE
 584 #define PID_TYPE "int"
 585 #endif
 586
 587 /* If GCC knows the exact uint_least16_t and uint_least32_t types from
 588    <stdint.h>, use them for char16_t and char32_t.  Otherwise, use
 589    these guesses; getting the wrong type of a given width will not
 590    affect C++ name mangling because in C++ these are distinct types
 591    not typedefs.  */
 592
 593 #ifdef UINT_LEAST16_TYPE
 594 #define CHAR16_TYPE UINT_LEAST16_TYPE
 595 #else
 596 #define CHAR16_TYPE "short unsigned int"
 597 #endif
 598
 599 #ifdef UINT_LEAST32_TYPE
 600 #define CHAR32_TYPE UINT_LEAST32_TYPE
 601 #else
 602 #define CHAR32_TYPE "unsigned int"
 603 #endif
 604
 605 #ifndef WCHAR_TYPE
 606 #define WCHAR_TYPE "int"
 607 #endif
 608
 609 /* WCHAR_TYPE gets overridden by -fshort-wchar.  */
 610 #define MODIFIED_WCHAR_TYPE \
 611         (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE)
 612
 613 #ifndef PTRDIFF_TYPE
 614 #define PTRDIFF_TYPE "long int"
 615 #endif
 616
 617 #ifndef WINT_TYPE
 618 #define WINT_TYPE "unsigned int"
 619 #endif
 620
 621 #ifndef INTMAX_TYPE
 622 #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)     \
 623                      ? "int"                                    \
 624                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 625                         ? "long int"                            \
 626                         : "long long int"))
 627 #endif
 628
 629 #ifndef UINTMAX_TYPE
 630 #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)    \
 631                      ? "unsigned int"                           \
 632                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 633                         ? "long unsigned int"                   \
 634                         : "long long unsigned int"))
 635 #endif
 636
 637
 638 /* There are no default definitions of these <stdint.h> types.  */
 639
 640 #ifndef SIG_ATOMIC_TYPE
 641 #define SIG_ATOMIC_TYPE ((const char *) NULL)
 642 #endif
 643
 644 #ifndef INT8_TYPE
 645 #define INT8_TYPE ((const char *) NULL)
 646 #endif
 647
 648 #ifndef INT16_TYPE
 649 #define INT16_TYPE ((const char *) NULL)
 650 #endif
 651
 652 #ifndef INT32_TYPE
 653 #define INT32_TYPE ((const char *) NULL)
 654 #endif
 655
 656 #ifndef INT64_TYPE
 657 #define INT64_TYPE ((const char *) NULL)
 658 #endif
 659
 660 #ifndef UINT8_TYPE
 661 #define UINT8_TYPE ((const char *) NULL)
 662 #endif
 663
 664 #ifndef UINT16_TYPE
 665 #define UINT16_TYPE ((const char *) NULL)
 666 #endif
 667
 668 #ifndef UINT32_TYPE
 669 #define UINT32_TYPE ((const char *) NULL)
 670 #endif
 671
 672 #ifndef UINT64_TYPE
 673 #define UINT64_TYPE ((const char *) NULL)
 674 #endif
 675
 676 #ifndef INT_LEAST8_TYPE
 677 #define INT_LEAST8_TYPE ((const char *) NULL)
 678 #endif
 679
 680 #ifndef INT_LEAST16_TYPE
 681 #define INT_LEAST16_TYPE ((const char *) NULL)
 682 #endif
 683
 684 #ifndef INT_LEAST32_TYPE
 685 #define INT_LEAST32_TYPE ((const char *) NULL)
 686 #endif
 687
 688 #ifndef INT_LEAST64_TYPE
 689 #define INT_LEAST64_TYPE ((const char *) NULL)
 690 #endif
 691
 692 #ifndef UINT_LEAST8_TYPE
 693 #define UINT_LEAST8_TYPE ((const char *) NULL)
 694 #endif
 695
 696 #ifndef UINT_LEAST16_TYPE
 697 #define UINT_LEAST16_TYPE ((const char *) NULL)
 698 #endif
 699
 700 #ifndef UINT_LEAST32_TYPE
 701 #define UINT_LEAST32_TYPE ((const char *) NULL)
 702 #endif
 703
 704 #ifndef UINT_LEAST64_TYPE
 705 #define UINT_LEAST64_TYPE ((const char *) NULL)
 706 #endif
 707
 708 #ifndef INT_FAST8_TYPE
 709 #define INT_FAST8_TYPE ((const char *) NULL)
 710 #endif
 711
 712 #ifndef INT_FAST16_TYPE
 713 #define INT_FAST16_TYPE ((const char *) NULL)
 714 #endif
 715
 716 #ifndef INT_FAST32_TYPE
 717 #define INT_FAST32_TYPE ((const char *) NULL)
 718 #endif
 719
 720 #ifndef INT_FAST64_TYPE
 721 #define INT_FAST64_TYPE ((const char *) NULL)
 722 #endif
 723
 724 #ifndef UINT_FAST8_TYPE
 725 #define UINT_FAST8_TYPE ((const char *) NULL)
 726 #endif
 727
 728 #ifndef UINT_FAST16_TYPE
 729 #define UINT_FAST16_TYPE ((const char *) NULL)
 730 #endif
 731
 732 #ifndef UINT_FAST32_TYPE
 733 #define UINT_FAST32_TYPE ((const char *) NULL)
 734 #endif
 735
 736 #ifndef UINT_FAST64_TYPE
 737 #define UINT_FAST64_TYPE ((const char *) NULL)
 738 #endif
 739
 740 #ifndef INTPTR_TYPE
 741 #define INTPTR_TYPE ((const char *) NULL)
 742 #endif
 743
 744 #ifndef UINTPTR_TYPE
 745 #define UINTPTR_TYPE ((const char *) NULL)
 746 #endif
 747
 748 /* Width in bits of a pointer.  Mind the value of the macro `Pmode'.  */
 749 #ifndef POINTER_SIZE
 750 #define POINTER_SIZE BITS_PER_WORD
 751 #endif
 752
 753 #ifndef PIC_OFFSET_TABLE_REGNUM
 754 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
 755 #endif
 756
 757 #ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
 758 #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 0
 759 #endif
 760
 761 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
 762 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
 763 #endif
 764
 765 #ifndef TARGET_DECLSPEC
 766 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
 767 /* If the target supports the "dllimport" attribute, users are
 768    probably used to the "__declspec" syntax.  */
 769 #define TARGET_DECLSPEC 1
 770 #else
 771 #define TARGET_DECLSPEC 0
 772 #endif
 773 #endif
 774
 775 /* By default, the preprocessor should be invoked the same way in C++
 776    as in C.  */
 777 #ifndef CPLUSPLUS_CPP_SPEC
 778 #ifdef CPP_SPEC
 779 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
 780 #endif
 781 #endif
 782
 783 #ifndef ACCUMULATE_OUTGOING_ARGS
 784 #define ACCUMULATE_OUTGOING_ARGS 0
 785 #endif
 786
 787 /* By default, use the GNU runtime for Objective C.  */
 788 #ifndef NEXT_OBJC_RUNTIME
 789 #define NEXT_OBJC_RUNTIME 0
 790 #endif
 791
 792 /* Supply a default definition for PUSH_ARGS.  */
 793 #ifndef PUSH_ARGS
 794 #ifdef PUSH_ROUNDING
 795 #define PUSH_ARGS       !ACCUMULATE_OUTGOING_ARGS
 796 #else
 797 #define PUSH_ARGS       0
 798 #endif
 799 #endif
 800
 801 /* Decide whether a function's arguments should be processed
 802    from first to last or from last to first.
 803
 804    They should if the stack and args grow in opposite directions, but
 805    only if we have push insns.  */
 806
 807 #ifdef PUSH_ROUNDING
 808
 809 #ifndef PUSH_ARGS_REVERSED
 810 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
 811 #define PUSH_ARGS_REVERSED  PUSH_ARGS
 812 #endif
 813 #endif
 814
 815 #endif
 816
 817 #ifndef PUSH_ARGS_REVERSED
 818 #define PUSH_ARGS_REVERSED 0
 819 #endif
 820
 821 /* Default value for the alignment (in bits) a C conformant malloc has to
 822    provide. This default is intended to be safe and always correct.  */
 823 #ifndef MALLOC_ABI_ALIGNMENT
 824 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
 825 #endif
 826
 827 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
 828    STACK_BOUNDARY is required.  */
 829 #ifndef PREFERRED_STACK_BOUNDARY
 830 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
 831 #endif
 832
 833 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not
 834    defined.  */
 835 #ifndef INCOMING_STACK_BOUNDARY
 836 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY
 837 #endif
 838
 839 #ifndef TARGET_DEFAULT_PACK_STRUCT
 840 #define TARGET_DEFAULT_PACK_STRUCT 0
 841 #endif
 842
 843 /* By default, the vtable entries are void pointers, the so the alignment
 844    is the same as pointer alignment.  The value of this macro specifies
 845    the alignment of the vtable entry in bits.  It should be defined only
 846    when special alignment is necessary.  */
 847 #ifndef TARGET_VTABLE_ENTRY_ALIGN
 848 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
 849 #endif
 850
 851 /* There are a few non-descriptor entries in the vtable at offsets below
 852    zero.  If these entries must be padded (say, to preserve the alignment
 853    specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
 854    words in each data entry.  */
 855 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
 856 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
 857 #endif
 858
 859 /* Decide whether it is safe to use a local alias for a virtual function
 860    when constructing thunks.  */
 861 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
 862 #ifdef ASM_OUTPUT_DEF
 863 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
 864 #else
 865 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
 866 #endif
 867 #endif
 868
 869 /* Select a format to encode pointers in exception handling data.  We
 870    prefer those that result in fewer dynamic relocations.  Assume no
 871    special support here and encode direct references.  */
 872 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
 873 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  DW_EH_PE_absptr
 874 #endif
 875
 876 /* By default, the C++ compiler will use the lowest bit of the pointer
 877    to function to indicate a pointer-to-member-function points to a
 878    virtual member function.  However, if FUNCTION_BOUNDARY indicates
 879    function addresses aren't always even, the lowest bit of the delta
 880    field will be used.  */
 881 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
 882 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
 883   (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
 884    ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
 885 #endif
 886
 887 #ifndef DEFAULT_GDB_EXTENSIONS
 888 #define DEFAULT_GDB_EXTENSIONS 1
 889 #endif
 890
 891 /* If more than one debugging type is supported, you must define
 892    PREFERRED_DEBUGGING_TYPE to choose the default.  */
 893
 894 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
 895          + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
 896          + defined (VMS_DEBUGGING_INFO))
 897 #ifndef PREFERRED_DEBUGGING_TYPE
 898 #error You must define PREFERRED_DEBUGGING_TYPE
 899 #endif /* no PREFERRED_DEBUGGING_TYPE */
 900
 901 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
 902    here so other code needn't care.  */
 903 #elif defined DBX_DEBUGGING_INFO
 904 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 905
 906 #elif defined SDB_DEBUGGING_INFO
 907 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
 908
 909 #elif defined DWARF2_DEBUGGING_INFO
 910 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 911
 912 #elif defined VMS_DEBUGGING_INFO
 913 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
 914
 915 #elif defined XCOFF_DEBUGGING_INFO
 916 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
 917
 918 #else
 919 /* No debugging format is supported by this target.  */
 920 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
 921 #endif
 922
 923 #ifndef LARGEST_EXPONENT_IS_NORMAL
 924 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
 925 #endif
 926
 927 #ifndef ROUND_TOWARDS_ZERO
 928 #define ROUND_TOWARDS_ZERO 0
 929 #endif
 930
 931 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
 932 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
 933 #endif
 934
 935 /* True if the targets integer-comparison functions return { 0, 1, 2
 936    } to indicate { <, ==, > }.  False if { -1, 0, 1 } is used
 937    instead.  The libgcc routines are biased.  */
 938 #ifndef TARGET_LIB_INT_CMP_BIASED
 939 #define TARGET_LIB_INT_CMP_BIASED (true)
 940 #endif
 941
 942 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
 943    then the word-endianness is the same as for integers.  */
 944 #ifndef FLOAT_WORDS_BIG_ENDIAN
 945 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 946 #endif
 947
 948 #ifndef REG_WORDS_BIG_ENDIAN
 949 #define REG_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 950 #endif
 951
 952 #ifdef TARGET_FLT_EVAL_METHOD
 953 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 1
 954 #else
 955 #define TARGET_FLT_EVAL_METHOD 0
 956 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 0
 957 #endif
 958
 959 #ifndef TARGET_DEC_EVAL_METHOD
 960 #define TARGET_DEC_EVAL_METHOD 2
 961 #endif
 962
 963 #ifndef HAS_LONG_COND_BRANCH
 964 #define HAS_LONG_COND_BRANCH 0
 965 #endif
 966
 967 #ifndef HAS_LONG_UNCOND_BRANCH
 968 #define HAS_LONG_UNCOND_BRANCH 0
 969 #endif
 970
 971 /* Determine whether __cxa_atexit, rather than atexit, is used to
 972    register C++ destructors for local statics and global objects.  */
 973 #ifndef DEFAULT_USE_CXA_ATEXIT
 974 #define DEFAULT_USE_CXA_ATEXIT 0
 975 #endif
 976
 977 /* If none of these macros are defined, the port must use the new
 978    technique of defining constraints in the machine description.
 979    tm_p.h will define those macros that machine-independent code
 980    still uses.  */
 981 #if  !defined CONSTRAINT_LEN                    \
 982   && !defined REG_CLASS_FROM_LETTER             \
 983   && !defined REG_CLASS_FROM_CONSTRAINT         \
 984   && !defined CONST_OK_FOR_LETTER_P             \
 985   && !defined CONST_OK_FOR_CONSTRAINT_P         \
 986   && !defined CONST_DOUBLE_OK_FOR_LETTER_P      \
 987   && !defined CONST_DOUBLE_OK_FOR_CONSTRAINT_P  \
 988   && !defined EXTRA_CONSTRAINT                  \
 989   && !defined EXTRA_CONSTRAINT_STR              \
 990   && !defined EXTRA_MEMORY_CONSTRAINT           \
 991   && !defined EXTRA_ADDRESS_CONSTRAINT
 992
 993 #define USE_MD_CONSTRAINTS
 994
 995 #if GCC_VERSION >= 3000 && defined IN_GCC
 996 /* These old constraint macros shouldn't appear anywhere in a
 997    configuration using MD constraint definitions.  */
 998 #pragma GCC poison REG_CLASS_FROM_LETTER CONST_OK_FOR_LETTER_P \
 999                    CONST_DOUBLE_OK_FOR_LETTER_P EXTRA_CONSTRAINT
1000 #endif
1001
1002 #else /* old constraint mechanism in use */
1003
1004 /* Determine whether extra constraint letter should be handled
1005    via address reload (like 'o').  */
1006 #ifndef EXTRA_MEMORY_CONSTRAINT
1007 #define EXTRA_MEMORY_CONSTRAINT(C,STR) 0
1008 #endif
1009
1010 /* Determine whether extra constraint letter should be handled
1011    as an address (like 'p').  */
1012 #ifndef EXTRA_ADDRESS_CONSTRAINT
1013 #define EXTRA_ADDRESS_CONSTRAINT(C,STR) 0
1014 #endif
1015
1016 /* When a port defines CONSTRAINT_LEN, it should use DEFAULT_CONSTRAINT_LEN
1017    for all the characters that it does not want to change, so things like the
1018   'length' of a digit in a matching constraint is an implementation detail,
1019    and not part of the interface.  */
1020 #define DEFAULT_CONSTRAINT_LEN(C,STR) 1
1021
1022 #ifndef CONSTRAINT_LEN
1023 #define CONSTRAINT_LEN(C,STR) DEFAULT_CONSTRAINT_LEN (C, STR)
1024 #endif
1025
1026 #if defined (CONST_OK_FOR_LETTER_P) && ! defined (CONST_OK_FOR_CONSTRAINT_P)
1027 #define CONST_OK_FOR_CONSTRAINT_P(VAL,C,STR) CONST_OK_FOR_LETTER_P (VAL, C)
1028 #endif
1029
1030 #if defined (CONST_DOUBLE_OK_FOR_LETTER_P) && ! defined (CONST_DOUBLE_OK_FOR_CONSTRAINT_P)
1031 #define CONST_DOUBLE_OK_FOR_CONSTRAINT_P(OP,C,STR) \
1032   CONST_DOUBLE_OK_FOR_LETTER_P (OP, C)
1033 #endif
1034
1035 #ifndef REG_CLASS_FROM_CONSTRAINT
1036 #define REG_CLASS_FROM_CONSTRAINT(C,STR) REG_CLASS_FROM_LETTER (C)
1037 #endif
1038
1039 #if defined (EXTRA_CONSTRAINT) && ! defined (EXTRA_CONSTRAINT_STR)
1040 #define EXTRA_CONSTRAINT_STR(OP, C,STR) EXTRA_CONSTRAINT (OP, C)
1041 #endif
1042
1043 #endif /* old constraint mechanism in use */
1044
1045 /* Determine whether the entire c99 runtime
1046    is present in the runtime library.  */
1047 #ifndef TARGET_C99_FUNCTIONS
1048 #define TARGET_C99_FUNCTIONS 0
1049 #endif
1050
1051 /* Determine whether the target runtime library has
1052    a sincos implementation following the GNU extension.  */
1053 #ifndef TARGET_HAS_SINCOS
1054 #define TARGET_HAS_SINCOS 0
1055 #endif
1056
1057 /* Indicate that CLZ and CTZ are undefined at zero.  */
1058 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
1059 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
1060 #endif
1061 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
1062 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
1063 #endif
1064
1065 /* Provide a default value for STORE_FLAG_VALUE.  */
1066 #ifndef STORE_FLAG_VALUE
1067 #define STORE_FLAG_VALUE  1
1068 #endif
1069
1070 /* This macro is used to determine what the largest unit size that
1071    move_by_pieces can use is.  */
1072
1073 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
1074    move efficiently, as opposed to  MOVE_MAX which is the maximum
1075    number of bytes we can move with a single instruction.  */
1076
1077 #ifndef MOVE_MAX_PIECES
1078 #define MOVE_MAX_PIECES   MOVE_MAX
1079 #endif
1080
1081 #ifndef MAX_MOVE_MAX
1082 #define MAX_MOVE_MAX MOVE_MAX
1083 #endif
1084
1085 #ifndef MIN_UNITS_PER_WORD
1086 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
1087 #endif
1088
1089 #ifndef MAX_BITS_PER_WORD
1090 #define MAX_BITS_PER_WORD BITS_PER_WORD
1091 #endif
1092
1093 #ifndef STACK_POINTER_OFFSET
1094 #define STACK_POINTER_OFFSET    0
1095 #endif
1096
1097 #ifndef LOCAL_REGNO
1098 #define LOCAL_REGNO(REGNO)  0
1099 #endif
1100
1101 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1102    the stack pointer does not matter.  The value is tested only in
1103    functions that have frame pointers.  */
1104 #ifndef EXIT_IGNORE_STACK
1105 #define EXIT_IGNORE_STACK 0
1106 #endif
1107
1108 /* Assume that case vectors are not pc-relative.  */
1109 #ifndef CASE_VECTOR_PC_RELATIVE
1110 #define CASE_VECTOR_PC_RELATIVE 0
1111 #endif
1112
1113 /* Assume that trampolines need function alignment.  */
1114 #ifndef TRAMPOLINE_ALIGNMENT
1115 #define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY
1116 #endif
1117
1118 /* Register mappings for target machines without register windows.  */
1119 #ifndef INCOMING_REGNO
1120 #define INCOMING_REGNO(N) (N)
1121 #endif
1122
1123 #ifndef OUTGOING_REGNO
1124 #define OUTGOING_REGNO(N) (N)
1125 #endif
1126
1127 #ifndef SHIFT_COUNT_TRUNCATED
1128 #define SHIFT_COUNT_TRUNCATED 0
1129 #endif
1130
1131 #ifndef LEGITIMATE_PIC_OPERAND_P
1132 #define LEGITIMATE_PIC_OPERAND_P(X) 1
1133 #endif
1134
1135 #ifndef TARGET_MEM_CONSTRAINT
1136 #define TARGET_MEM_CONSTRAINT 'm'
1137 #endif
1138
1139 #ifndef REVERSIBLE_CC_MODE
1140 #define REVERSIBLE_CC_MODE(MODE) 0
1141 #endif
1142
1143 /* Biggest alignment supported by the object file format of this machine.  */
1144 #ifndef MAX_OFILE_ALIGNMENT
1145 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
1146 #endif
1147
1148 #ifndef FRAME_GROWS_DOWNWARD
1149 #define FRAME_GROWS_DOWNWARD 0
1150 #endif
1151
1152 /* On most machines, the CFA coincides with the first incoming parm.  */
1153 #ifndef ARG_POINTER_CFA_OFFSET
1154 #define ARG_POINTER_CFA_OFFSET(FNDECL) \
1155   (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
1156 #endif
1157
1158 /* On most machines, we use the CFA as DW_AT_frame_base.  */
1159 #ifndef CFA_FRAME_BASE_OFFSET
1160 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0
1161 #endif
1162
1163 /* The offset from the incoming value of %sp to the top of the stack frame
1164    for the current function.  */
1165 #ifndef INCOMING_FRAME_SP_OFFSET
1166 #define INCOMING_FRAME_SP_OFFSET 0
1167 #endif
1168
1169 #ifndef HARD_REGNO_NREGS_HAS_PADDING
1170 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
1171 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
1172 #endif
1173
1174 #ifndef OUTGOING_REG_PARM_STACK_SPACE
1175 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
1176 #endif
1177
1178 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
1179    the backend.  MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
1180    effort stack alignment supported by the backend.  If the backend
1181    supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
1182    MAX_STACK_ALIGNMENT are the same.  Otherwise, the incoming stack
1183    boundary will limit the maximum guaranteed stack alignment.  */
1184 #ifdef MAX_STACK_ALIGNMENT
1185 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
1186 #else
1187 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY
1188 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
1189 #endif
1190
1191 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
1192
1193 #ifndef LOCAL_ALIGNMENT
1194 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
1195 #endif
1196
1197 #ifndef STACK_SLOT_ALIGNMENT
1198 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
1199   ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
1200 #endif
1201
1202 #ifndef LOCAL_DECL_ALIGNMENT
1203 #define LOCAL_DECL_ALIGNMENT(DECL) \
1204   LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
1205 #endif
1206
1207 #ifndef MINIMUM_ALIGNMENT
1208 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN)
1209 #endif
1210
1211 /* Alignment value for attribute ((aligned)).  */
1212 #ifndef ATTRIBUTE_ALIGNED_VALUE
1213 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
1214 #endif
1215
1216 /* Many ports have no mode-dependent addresses (except possibly autoincrement
1217    and autodecrement addresses, which are handled by target-independent code
1218    in recog.c).  */
1219 #ifndef GO_IF_MODE_DEPENDENT_ADDRESS
1220 #define GO_IF_MODE_DEPENDENT_ADDRESS(X, WIN)
1221 #endif
1222
1223 /* For most ports anything that evaluates to a constant symbolic
1224    or integer value is acceptable as a constant address.  */
1225 #ifndef CONSTANT_ADDRESS_P
1226 #define CONSTANT_ADDRESS_P(X)   (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE)
1227 #endif
1228
1229 #ifndef MAX_FIXED_MODE_SIZE
1230 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
1231 #endif
1232
1233 /* Nonzero if structures and unions should be returned in memory.
1234
1235    This should only be defined if compatibility with another compiler or
1236    with an ABI is needed, because it results in slower code.  */
1237
1238 #ifndef DEFAULT_PCC_STRUCT_RETURN
1239 #define DEFAULT_PCC_STRUCT_RETURN 1
1240 #endif
1241
1242 #ifdef GCC_INSN_FLAGS_H
1243 /* Dependent default target macro definitions
1244
1245    This section of defaults.h defines target macros that depend on generated
1246    headers.  This is a bit awkward:  We want to put all default definitions
1247    for target macros in defaults.h, but some of the defaults depend on the
1248    HAVE_* flags defines of insn-flags.h.  But insn-flags.h is not always
1249    included by files that do include defaults.h.
1250
1251    Fortunately, the default macro definitions that depend on the HAVE_*
1252    macros are also the ones that will only be used inside GCC itself, i.e.
1253    not in the gen* programs or in target objects like libgcc.
1254
1255    Obviously, it would be best to keep this section of defaults.h as small
1256    as possible, by converting the macros defined below to target hooks or
1257    functions.
1258 */
1259
1260 /* The default branch cost is 1.  */
1261 #ifndef BRANCH_COST
1262 #define BRANCH_COST(speed_p, predictable_p) 1
1263 #endif
1264
1265 /* If a memory-to-memory move would take MOVE_RATIO or more simple
1266    move-instruction sequences, we will do a movmem or libcall instead.  */
1267
1268 #ifndef MOVE_RATIO
1269 #if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti)
1270 #define MOVE_RATIO(speed) 2
1271 #else
1272 /* If we are optimizing for space (-Os), cut down the default move ratio.  */
1273 #define MOVE_RATIO(speed) ((speed) ? 15 : 3)
1274 #endif
1275 #endif
1276
1277 /* If a clear memory operation would take CLEAR_RATIO or more simple
1278    move-instruction sequences, we will do a setmem or libcall instead.  */
1279
1280 #ifndef CLEAR_RATIO
1281 #if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
1282 #define CLEAR_RATIO(speed) 2
1283 #else
1284 /* If we are optimizing for space, cut down the default clear ratio.  */
1285 #define CLEAR_RATIO(speed) ((speed) ? 15 :3)
1286 #endif
1287 #endif
1288
1289 /* If a memory set (to value other than zero) operation would take
1290    SET_RATIO or more simple move-instruction sequences, we will do a movmem
1291    or libcall instead.  */
1292 #ifndef SET_RATIO
1293 #define SET_RATIO(speed) MOVE_RATIO(speed)
1294 #endif
1295
1296 /* Supply a default definition for FUNCTION_ARG_PADDING:
1297    usually pad upward, but pad short args downward on
1298    big-endian machines.  */
1299
1300 #define DEFAULT_FUNCTION_ARG_PADDING(MODE, TYPE)                        \
1301   (! BYTES_BIG_ENDIAN                                                   \
1302    ? upward                                                             \
1303    : (((MODE) == BLKmode                                                \
1304        ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST         \
1305           && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \
1306        : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY)                       \
1307       ? downward : upward))
1308
1309 #ifndef FUNCTION_ARG_PADDING
1310 #define FUNCTION_ARG_PADDING(MODE, TYPE)        \
1311   DEFAULT_FUNCTION_ARG_PADDING ((MODE), (TYPE))
1312 #endif
1313
1314 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
1315    Normally move_insn, so Pmode stack pointer.  */
1316
1317 #ifndef STACK_SAVEAREA_MODE
1318 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
1319 #endif
1320
1321 /* Supply a default definition of STACK_SIZE_MODE for
1322    allocate_dynamic_stack_space.  Normally PLUS/MINUS, so word_mode.  */
1323
1324 #ifndef STACK_SIZE_MODE
1325 #define STACK_SIZE_MODE word_mode
1326 #endif
1327
1328 /* Provide default values for the macros controlling stack checking.  */
1329
1330 /* The default is neither full builtin stack checking...  */
1331 #ifndef STACK_CHECK_BUILTIN
1332 #define STACK_CHECK_BUILTIN 0
1333 #endif
1334
1335 /* ...nor static builtin stack checking.  */
1336 #ifndef STACK_CHECK_STATIC_BUILTIN
1337 #define STACK_CHECK_STATIC_BUILTIN 0
1338 #endif
1339
1340 /* The default interval is one page (4096 bytes).  */
1341 #ifndef STACK_CHECK_PROBE_INTERVAL_EXP
1342 #define STACK_CHECK_PROBE_INTERVAL_EXP 12
1343 #endif
1344
1345 /* The default is not to move the stack pointer.  */
1346 #ifndef STACK_CHECK_MOVING_SP
1347 #define STACK_CHECK_MOVING_SP 0
1348 #endif
1349
1350 /* This is a kludge to try to capture the discrepancy between the old
1351    mechanism (generic stack checking) and the new mechanism (static
1352    builtin stack checking).  STACK_CHECK_PROTECT needs to be bumped
1353    for the latter because part of the protection area is effectively
1354    included in STACK_CHECK_MAX_FRAME_SIZE for the former.  */
1355 #ifdef STACK_CHECK_PROTECT
1356 #define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
1357 #else
1358 #define STACK_OLD_CHECK_PROTECT                                         \
1359  (targetm_common.except_unwind_info (&global_options) == UI_SJLJ        \
1360   ? 75 * UNITS_PER_WORD                                                 \
1361   : 8 * 1024)
1362 #endif
1363
1364 /* Minimum amount of stack required to recover from an anticipated stack
1365    overflow detection.  The default value conveys an estimate of the amount
1366    of stack required to propagate an exception.  */
1367 #ifndef STACK_CHECK_PROTECT
1368 #define STACK_CHECK_PROTECT                                             \
1369  (targetm_common.except_unwind_info (&global_options) == UI_SJLJ        \
1370   ? 75 * UNITS_PER_WORD                                                 \
1371   : 12 * 1024)
1372 #endif
1373
1374 /* Make the maximum frame size be the largest we can and still only need
1375    one probe per function.  */
1376 #ifndef STACK_CHECK_MAX_FRAME_SIZE
1377 #define STACK_CHECK_MAX_FRAME_SIZE \
1378   ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD)
1379 #endif
1380
1381 /* This is arbitrary, but should be large enough everywhere.  */
1382 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
1383 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
1384 #endif
1385
1386 /* Provide a reasonable default for the maximum size of an object to
1387    allocate in the fixed frame.  We may need to be able to make this
1388    controllable by the user at some point.  */
1389 #ifndef STACK_CHECK_MAX_VAR_SIZE
1390 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
1391 #endif
1392
1393 /* By default, the C++ compiler will use function addresses in the
1394    vtable entries.  Setting this nonzero tells the compiler to use
1395    function descriptors instead.  The value of this macro says how
1396    many words wide the descriptor is (normally 2).  It is assumed
1397    that the address of a function descriptor may be treated as a
1398    pointer to a function.  */
1399 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
1400 #define TARGET_VTABLE_USES_DESCRIPTORS 0
1401 #endif
1402
1403 #ifndef SWITCHABLE_TARGET
1404 #define SWITCHABLE_TARGET 0
1405 #endif
1406
1407 #endif /* GCC_INSN_FLAGS_H  */
1408
1409 #endif  /* ! GCC_DEFAULTS_H */