gcc/defaults.h

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