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 /* Determines whether we may use common symbols to represent one-only
 336    semantics (a.k.a. "vague linkage").  */
 337 #ifndef USE_COMMON_FOR_ONE_ONLY
 338 # define USE_COMMON_FOR_ONE_ONLY 1
 339 #endif
 340
 341 /* By default we can assume that all global symbols are in one namespace,
 342    across all shared libraries.  */
 343 #ifndef MULTIPLE_SYMBOL_SPACES
 344 # define MULTIPLE_SYMBOL_SPACES 0
 345 #endif
 346
 347 /* If the target supports init_priority C++ attribute, give
 348    SUPPORTS_INIT_PRIORITY a nonzero value.  */
 349 #ifndef SUPPORTS_INIT_PRIORITY
 350 #define SUPPORTS_INIT_PRIORITY 1
 351 #endif /* SUPPORTS_INIT_PRIORITY */
 352
 353 /* If 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 /* By default, use the GNU runtime for Objective C.  */
 790 #ifndef NEXT_OBJC_RUNTIME
 791 #define NEXT_OBJC_RUNTIME 0
 792 #endif
 793
 794 /* Supply a default definition for PUSH_ARGS.  */
 795 #ifndef PUSH_ARGS
 796 #ifdef PUSH_ROUNDING
 797 #define PUSH_ARGS       !ACCUMULATE_OUTGOING_ARGS
 798 #else
 799 #define PUSH_ARGS       0
 800 #endif
 801 #endif
 802
 803 /* Decide whether a function's arguments should be processed
 804    from first to last or from last to first.
 805
 806    They should if the stack and args grow in opposite directions, but
 807    only if we have push insns.  */
 808
 809 #ifdef PUSH_ROUNDING
 810
 811 #ifndef PUSH_ARGS_REVERSED
 812 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
 813 #define PUSH_ARGS_REVERSED  PUSH_ARGS
 814 #endif
 815 #endif
 816
 817 #endif
 818
 819 #ifndef PUSH_ARGS_REVERSED
 820 #define PUSH_ARGS_REVERSED 0
 821 #endif
 822
 823 /* Default value for the alignment (in bits) a C conformant malloc has to
 824    provide. This default is intended to be safe and always correct.  */
 825 #ifndef MALLOC_ABI_ALIGNMENT
 826 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
 827 #endif
 828
 829 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
 830    STACK_BOUNDARY is required.  */
 831 #ifndef PREFERRED_STACK_BOUNDARY
 832 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
 833 #endif
 834
 835 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not
 836    defined.  */
 837 #ifndef INCOMING_STACK_BOUNDARY
 838 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY
 839 #endif
 840
 841 #ifndef TARGET_DEFAULT_PACK_STRUCT
 842 #define TARGET_DEFAULT_PACK_STRUCT 0
 843 #endif
 844
 845 /* By default, the vtable entries are void pointers, the so the alignment
 846    is the same as pointer alignment.  The value of this macro specifies
 847    the alignment of the vtable entry in bits.  It should be defined only
 848    when special alignment is necessary.  */
 849 #ifndef TARGET_VTABLE_ENTRY_ALIGN
 850 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
 851 #endif
 852
 853 /* There are a few non-descriptor entries in the vtable at offsets below
 854    zero.  If these entries must be padded (say, to preserve the alignment
 855    specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
 856    words in each data entry.  */
 857 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
 858 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
 859 #endif
 860
 861 /* Decide whether it is safe to use a local alias for a virtual function
 862    when constructing thunks.  */
 863 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
 864 #ifdef ASM_OUTPUT_DEF
 865 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
 866 #else
 867 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
 868 #endif
 869 #endif
 870
 871 /* Select a format to encode pointers in exception handling data.  We
 872    prefer those that result in fewer dynamic relocations.  Assume no
 873    special support here and encode direct references.  */
 874 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
 875 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  DW_EH_PE_absptr
 876 #endif
 877
 878 /* By default, the C++ compiler will use the lowest bit of the pointer
 879    to function to indicate a pointer-to-member-function points to a
 880    virtual member function.  However, if FUNCTION_BOUNDARY indicates
 881    function addresses aren't always even, the lowest bit of the delta
 882    field will be used.  */
 883 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
 884 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
 885   (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
 886    ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
 887 #endif
 888
 889 #ifndef DEFAULT_GDB_EXTENSIONS
 890 #define DEFAULT_GDB_EXTENSIONS 1
 891 #endif
 892
 893 /* If more than one debugging type is supported, you must define
 894    PREFERRED_DEBUGGING_TYPE to choose the default.  */
 895
 896 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
 897          + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
 898          + defined (VMS_DEBUGGING_INFO))
 899 #ifndef PREFERRED_DEBUGGING_TYPE
 900 #error You must define PREFERRED_DEBUGGING_TYPE
 901 #endif /* no PREFERRED_DEBUGGING_TYPE */
 902
 903 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
 904    here so other code needn't care.  */
 905 #elif defined DBX_DEBUGGING_INFO
 906 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 907
 908 #elif defined SDB_DEBUGGING_INFO
 909 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
 910
 911 #elif defined DWARF2_DEBUGGING_INFO
 912 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 913
 914 #elif defined VMS_DEBUGGING_INFO
 915 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
 916
 917 #elif defined XCOFF_DEBUGGING_INFO
 918 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
 919
 920 #else
 921 /* No debugging format is supported by this target.  */
 922 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
 923 #endif
 924
 925 #ifndef LARGEST_EXPONENT_IS_NORMAL
 926 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
 927 #endif
 928
 929 #ifndef ROUND_TOWARDS_ZERO
 930 #define ROUND_TOWARDS_ZERO 0
 931 #endif
 932
 933 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
 934 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
 935 #endif
 936
 937 /* True if the targets integer-comparison functions return { 0, 1, 2
 938    } to indicate { <, ==, > }.  False if { -1, 0, 1 } is used
 939    instead.  The libgcc routines are biased.  */
 940 #ifndef TARGET_LIB_INT_CMP_BIASED
 941 #define TARGET_LIB_INT_CMP_BIASED (true)
 942 #endif
 943
 944 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
 945    then the word-endianness is the same as for integers.  */
 946 #ifndef FLOAT_WORDS_BIG_ENDIAN
 947 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 948 #endif
 949
 950 #ifndef REG_WORDS_BIG_ENDIAN
 951 #define REG_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 952 #endif
 953
 954 #ifdef TARGET_FLT_EVAL_METHOD
 955 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 1
 956 #else
 957 #define TARGET_FLT_EVAL_METHOD 0
 958 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 0
 959 #endif
 960
 961 #ifndef TARGET_DEC_EVAL_METHOD
 962 #define TARGET_DEC_EVAL_METHOD 2
 963 #endif
 964
 965 #ifndef HAS_LONG_COND_BRANCH
 966 #define HAS_LONG_COND_BRANCH 0
 967 #endif
 968
 969 #ifndef HAS_LONG_UNCOND_BRANCH
 970 #define HAS_LONG_UNCOND_BRANCH 0
 971 #endif
 972
 973 /* Determine whether __cxa_atexit, rather than atexit, is used to
 974    register C++ destructors for local statics and global objects.  */
 975 #ifndef DEFAULT_USE_CXA_ATEXIT
 976 #define DEFAULT_USE_CXA_ATEXIT 0
 977 #endif
 978
 979 /* If none of these macros are defined, the port must use the new
 980    technique of defining constraints in the machine description.
 981    tm_p.h will define those macros that machine-independent code
 982    still uses.  */
 983 #if  !defined CONSTRAINT_LEN                    \
 984   && !defined REG_CLASS_FROM_LETTER             \
 985   && !defined REG_CLASS_FROM_CONSTRAINT         \
 986   && !defined CONST_OK_FOR_LETTER_P             \
 987   && !defined CONST_OK_FOR_CONSTRAINT_P         \
 988   && !defined CONST_DOUBLE_OK_FOR_LETTER_P      \
 989   && !defined CONST_DOUBLE_OK_FOR_CONSTRAINT_P  \
 990   && !defined EXTRA_CONSTRAINT                  \
 991   && !defined EXTRA_CONSTRAINT_STR              \
 992   && !defined EXTRA_MEMORY_CONSTRAINT           \
 993   && !defined EXTRA_ADDRESS_CONSTRAINT
 994
 995 #define USE_MD_CONSTRAINTS
 996
 997 #if GCC_VERSION >= 3000 && defined IN_GCC
 998 /* These old constraint macros shouldn't appear anywhere in a
 999    configuration using MD constraint definitions.  */
1000 #pragma GCC poison REG_CLASS_FROM_LETTER CONST_OK_FOR_LETTER_P \
1001                    CONST_DOUBLE_OK_FOR_LETTER_P EXTRA_CONSTRAINT
1002 #endif
1003
1004 #else /* old constraint mechanism in use */
1005
1006 /* Determine whether extra constraint letter should be handled
1007    via address reload (like 'o').  */
1008 #ifndef EXTRA_MEMORY_CONSTRAINT
1009 #define EXTRA_MEMORY_CONSTRAINT(C,STR) 0
1010 #endif
1011
1012 /* Determine whether extra constraint letter should be handled
1013    as an address (like 'p').  */
1014 #ifndef EXTRA_ADDRESS_CONSTRAINT
1015 #define EXTRA_ADDRESS_CONSTRAINT(C,STR) 0
1016 #endif
1017
1018 /* When a port defines CONSTRAINT_LEN, it should use DEFAULT_CONSTRAINT_LEN
1019    for all the characters that it does not want to change, so things like the
1020   'length' of a digit in a matching constraint is an implementation detail,
1021    and not part of the interface.  */
1022 #define DEFAULT_CONSTRAINT_LEN(C,STR) 1
1023
1024 #ifndef CONSTRAINT_LEN
1025 #define CONSTRAINT_LEN(C,STR) DEFAULT_CONSTRAINT_LEN (C, STR)
1026 #endif
1027
1028 #if defined (CONST_OK_FOR_LETTER_P) && ! defined (CONST_OK_FOR_CONSTRAINT_P)
1029 #define CONST_OK_FOR_CONSTRAINT_P(VAL,C,STR) CONST_OK_FOR_LETTER_P (VAL, C)
1030 #endif
1031
1032 #if defined (CONST_DOUBLE_OK_FOR_LETTER_P) && ! defined (CONST_DOUBLE_OK_FOR_CONSTRAINT_P)
1033 #define CONST_DOUBLE_OK_FOR_CONSTRAINT_P(OP,C,STR) \
1034   CONST_DOUBLE_OK_FOR_LETTER_P (OP, C)
1035 #endif
1036
1037 #ifndef REG_CLASS_FROM_CONSTRAINT
1038 #define REG_CLASS_FROM_CONSTRAINT(C,STR) REG_CLASS_FROM_LETTER (C)
1039 #endif
1040
1041 #if defined (EXTRA_CONSTRAINT) && ! defined (EXTRA_CONSTRAINT_STR)
1042 #define EXTRA_CONSTRAINT_STR(OP, C,STR) EXTRA_CONSTRAINT (OP, C)
1043 #endif
1044
1045 #endif /* old constraint mechanism in use */
1046
1047 /* Determine whether the entire c99 runtime
1048    is present in the runtime library.  */
1049 #ifndef TARGET_C99_FUNCTIONS
1050 #define TARGET_C99_FUNCTIONS 0
1051 #endif
1052
1053 /* Determine whether the target runtime library has
1054    a sincos implementation following the GNU extension.  */
1055 #ifndef TARGET_HAS_SINCOS
1056 #define TARGET_HAS_SINCOS 0
1057 #endif
1058
1059 /* Indicate that CLZ and CTZ are undefined at zero.  */
1060 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
1061 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
1062 #endif
1063 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
1064 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
1065 #endif
1066
1067 /* Provide a default value for STORE_FLAG_VALUE.  */
1068 #ifndef STORE_FLAG_VALUE
1069 #define STORE_FLAG_VALUE  1
1070 #endif
1071
1072 /* This macro is used to determine what the largest unit size that
1073    move_by_pieces can use is.  */
1074
1075 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
1076    move efficiently, as opposed to  MOVE_MAX which is the maximum
1077    number of bytes we can move with a single instruction.  */
1078
1079 #ifndef MOVE_MAX_PIECES
1080 #define MOVE_MAX_PIECES   MOVE_MAX
1081 #endif
1082
1083 #ifndef MAX_MOVE_MAX
1084 #define MAX_MOVE_MAX MOVE_MAX
1085 #endif
1086
1087 #ifndef MIN_UNITS_PER_WORD
1088 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
1089 #endif
1090
1091 #ifndef MAX_BITS_PER_WORD
1092 #define MAX_BITS_PER_WORD BITS_PER_WORD
1093 #endif
1094
1095 #ifndef STACK_POINTER_OFFSET
1096 #define STACK_POINTER_OFFSET    0
1097 #endif
1098
1099 #ifndef LOCAL_REGNO
1100 #define LOCAL_REGNO(REGNO)  0
1101 #endif
1102
1103 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1104    the stack pointer does not matter.  The value is tested only in
1105    functions that have frame pointers.  */
1106 #ifndef EXIT_IGNORE_STACK
1107 #define EXIT_IGNORE_STACK 0
1108 #endif
1109
1110 /* Assume that case vectors are not pc-relative.  */
1111 #ifndef CASE_VECTOR_PC_RELATIVE
1112 #define CASE_VECTOR_PC_RELATIVE 0
1113 #endif
1114
1115 /* Assume that trampolines need function alignment.  */
1116 #ifndef TRAMPOLINE_ALIGNMENT
1117 #define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY
1118 #endif
1119
1120 /* Register mappings for target machines without register windows.  */
1121 #ifndef INCOMING_REGNO
1122 #define INCOMING_REGNO(N) (N)
1123 #endif
1124
1125 #ifndef OUTGOING_REGNO
1126 #define OUTGOING_REGNO(N) (N)
1127 #endif
1128
1129 #ifndef SHIFT_COUNT_TRUNCATED
1130 #define SHIFT_COUNT_TRUNCATED 0
1131 #endif
1132
1133 #ifndef LEGITIMATE_PIC_OPERAND_P
1134 #define LEGITIMATE_PIC_OPERAND_P(X) 1
1135 #endif
1136
1137 #ifndef TARGET_MEM_CONSTRAINT
1138 #define TARGET_MEM_CONSTRAINT 'm'
1139 #endif
1140
1141 #ifndef REVERSIBLE_CC_MODE
1142 #define REVERSIBLE_CC_MODE(MODE) 0
1143 #endif
1144
1145 /* Biggest alignment supported by the object file format of this machine.  */
1146 #ifndef MAX_OFILE_ALIGNMENT
1147 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
1148 #endif
1149
1150 #ifndef FRAME_GROWS_DOWNWARD
1151 #define FRAME_GROWS_DOWNWARD 0
1152 #endif
1153
1154 /* On most machines, the CFA coincides with the first incoming parm.  */
1155 #ifndef ARG_POINTER_CFA_OFFSET
1156 #define ARG_POINTER_CFA_OFFSET(FNDECL) \
1157   (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
1158 #endif
1159
1160 /* On most machines, we use the CFA as DW_AT_frame_base.  */
1161 #ifndef CFA_FRAME_BASE_OFFSET
1162 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0
1163 #endif
1164
1165 /* The offset from the incoming value of %sp to the top of the stack frame
1166    for the current function.  */
1167 #ifndef INCOMING_FRAME_SP_OFFSET
1168 #define INCOMING_FRAME_SP_OFFSET 0
1169 #endif
1170
1171 #ifndef HARD_REGNO_NREGS_HAS_PADDING
1172 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
1173 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
1174 #endif
1175
1176 #ifndef OUTGOING_REG_PARM_STACK_SPACE
1177 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
1178 #endif
1179
1180 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
1181    the backend.  MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
1182    effort stack alignment supported by the backend.  If the backend
1183    supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
1184    MAX_STACK_ALIGNMENT are the same.  Otherwise, the incoming stack
1185    boundary will limit the maximum guaranteed stack alignment.  */
1186 #ifdef MAX_STACK_ALIGNMENT
1187 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
1188 #else
1189 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY
1190 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
1191 #endif
1192
1193 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
1194
1195 #ifndef LOCAL_ALIGNMENT
1196 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
1197 #endif
1198
1199 #ifndef STACK_SLOT_ALIGNMENT
1200 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
1201   ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
1202 #endif
1203
1204 #ifndef LOCAL_DECL_ALIGNMENT
1205 #define LOCAL_DECL_ALIGNMENT(DECL) \
1206   LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
1207 #endif
1208
1209 #ifndef MINIMUM_ALIGNMENT
1210 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN)
1211 #endif
1212
1213 /* Alignment value for attribute ((aligned)).  */
1214 #ifndef ATTRIBUTE_ALIGNED_VALUE
1215 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
1216 #endif
1217
1218 /* Many ports have no mode-dependent addresses (except possibly autoincrement
1219    and autodecrement addresses, which are handled by target-independent code
1220    in recog.c).  */
1221 #ifndef GO_IF_MODE_DEPENDENT_ADDRESS
1222 #define GO_IF_MODE_DEPENDENT_ADDRESS(X, WIN)
1223 #endif
1224
1225 /* For most ports anything that evaluates to a constant symbolic
1226    or integer value is acceptable as a constant address.  */
1227 #ifndef CONSTANT_ADDRESS_P
1228 #define CONSTANT_ADDRESS_P(X)   (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE)
1229 #endif
1230
1231 #ifndef MAX_FIXED_MODE_SIZE
1232 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
1233 #endif
1234
1235 /* Nonzero if structures and unions should be returned in memory.
1236
1237    This should only be defined if compatibility with another compiler or
1238    with an ABI is needed, because it results in slower code.  */
1239
1240 #ifndef DEFAULT_PCC_STRUCT_RETURN
1241 #define DEFAULT_PCC_STRUCT_RETURN 1
1242 #endif
1243
1244 #ifdef GCC_INSN_FLAGS_H
1245 /* Dependent default target macro definitions
1246
1247    This section of defaults.h defines target macros that depend on generated
1248    headers.  This is a bit awkward:  We want to put all default definitions
1249    for target macros in defaults.h, but some of the defaults depend on the
1250    HAVE_* flags defines of insn-flags.h.  But insn-flags.h is not always
1251    included by files that do include defaults.h.
1252
1253    Fortunately, the default macro definitions that depend on the HAVE_*
1254    macros are also the ones that will only be used inside GCC itself, i.e.
1255    not in the gen* programs or in target objects like libgcc.
1256
1257    Obviously, it would be best to keep this section of defaults.h as small
1258    as possible, by converting the macros defined below to target hooks or
1259    functions.
1260 */
1261
1262 /* The default branch cost is 1.  */
1263 #ifndef BRANCH_COST
1264 #define BRANCH_COST(speed_p, predictable_p) 1
1265 #endif
1266
1267 /* If a memory-to-memory move would take MOVE_RATIO or more simple
1268    move-instruction sequences, we will do a movmem or libcall instead.  */
1269
1270 #ifndef MOVE_RATIO
1271 #if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti)
1272 #define MOVE_RATIO(speed) 2
1273 #else
1274 /* If we are optimizing for space (-Os), cut down the default move ratio.  */
1275 #define MOVE_RATIO(speed) ((speed) ? 15 : 3)
1276 #endif
1277 #endif
1278
1279 /* If a clear memory operation would take CLEAR_RATIO or more simple
1280    move-instruction sequences, we will do a setmem or libcall instead.  */
1281
1282 #ifndef CLEAR_RATIO
1283 #if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
1284 #define CLEAR_RATIO(speed) 2
1285 #else
1286 /* If we are optimizing for space, cut down the default clear ratio.  */
1287 #define CLEAR_RATIO(speed) ((speed) ? 15 :3)
1288 #endif
1289 #endif
1290
1291 /* If a memory set (to value other than zero) operation would take
1292    SET_RATIO or more simple move-instruction sequences, we will do a movmem
1293    or libcall instead.  */
1294 #ifndef SET_RATIO
1295 #define SET_RATIO(speed) MOVE_RATIO(speed)
1296 #endif
1297
1298 /* Supply a default definition for FUNCTION_ARG_PADDING:
1299    usually pad upward, but pad short args downward on
1300    big-endian machines.  */
1301
1302 #define DEFAULT_FUNCTION_ARG_PADDING(MODE, TYPE)                        \
1303   (! BYTES_BIG_ENDIAN                                                   \
1304    ? upward                                                             \
1305    : (((MODE) == BLKmode                                                \
1306        ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST         \
1307           && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \
1308        : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY)                       \
1309       ? downward : upward))
1310
1311 #ifndef FUNCTION_ARG_PADDING
1312 #define FUNCTION_ARG_PADDING(MODE, TYPE)        \
1313   DEFAULT_FUNCTION_ARG_PADDING ((MODE), (TYPE))
1314 #endif
1315
1316 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
1317    Normally move_insn, so Pmode stack pointer.  */
1318
1319 #ifndef STACK_SAVEAREA_MODE
1320 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
1321 #endif
1322
1323 /* Supply a default definition of STACK_SIZE_MODE for
1324    allocate_dynamic_stack_space.  Normally PLUS/MINUS, so word_mode.  */
1325
1326 #ifndef STACK_SIZE_MODE
1327 #define STACK_SIZE_MODE word_mode
1328 #endif
1329
1330 /* Provide default values for the macros controlling stack checking.  */
1331
1332 /* The default is neither full builtin stack checking...  */
1333 #ifndef STACK_CHECK_BUILTIN
1334 #define STACK_CHECK_BUILTIN 0
1335 #endif
1336
1337 /* ...nor static builtin stack checking.  */
1338 #ifndef STACK_CHECK_STATIC_BUILTIN
1339 #define STACK_CHECK_STATIC_BUILTIN 0
1340 #endif
1341
1342 /* The default interval is one page (4096 bytes).  */
1343 #ifndef STACK_CHECK_PROBE_INTERVAL_EXP
1344 #define STACK_CHECK_PROBE_INTERVAL_EXP 12
1345 #endif
1346
1347 /* The default is not to move the stack pointer.  */
1348 #ifndef STACK_CHECK_MOVING_SP
1349 #define STACK_CHECK_MOVING_SP 0
1350 #endif
1351
1352 /* This is a kludge to try to capture the discrepancy between the old
1353    mechanism (generic stack checking) and the new mechanism (static
1354    builtin stack checking).  STACK_CHECK_PROTECT needs to be bumped
1355    for the latter because part of the protection area is effectively
1356    included in STACK_CHECK_MAX_FRAME_SIZE for the former.  */
1357 #ifdef STACK_CHECK_PROTECT
1358 #define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
1359 #else
1360 #define STACK_OLD_CHECK_PROTECT                                         \
1361  (targetm_common.except_unwind_info (&global_options) == UI_SJLJ        \
1362   ? 75 * UNITS_PER_WORD                                                 \
1363   : 8 * 1024)
1364 #endif
1365
1366 /* Minimum amount of stack required to recover from an anticipated stack
1367    overflow detection.  The default value conveys an estimate of the amount
1368    of stack required to propagate an exception.  */
1369 #ifndef STACK_CHECK_PROTECT
1370 #define STACK_CHECK_PROTECT                                             \
1371  (targetm_common.except_unwind_info (&global_options) == UI_SJLJ        \
1372   ? 75 * UNITS_PER_WORD                                                 \
1373   : 12 * 1024)
1374 #endif
1375
1376 /* Make the maximum frame size be the largest we can and still only need
1377    one probe per function.  */
1378 #ifndef STACK_CHECK_MAX_FRAME_SIZE
1379 #define STACK_CHECK_MAX_FRAME_SIZE \
1380   ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD)
1381 #endif
1382
1383 /* This is arbitrary, but should be large enough everywhere.  */
1384 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
1385 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
1386 #endif
1387
1388 /* Provide a reasonable default for the maximum size of an object to
1389    allocate in the fixed frame.  We may need to be able to make this
1390    controllable by the user at some point.  */
1391 #ifndef STACK_CHECK_MAX_VAR_SIZE
1392 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
1393 #endif
1394
1395 /* By default, the C++ compiler will use function addresses in the
1396    vtable entries.  Setting this nonzero tells the compiler to use
1397    function descriptors instead.  The value of this macro says how
1398    many words wide the descriptor is (normally 2).  It is assumed
1399    that the address of a function descriptor may be treated as a
1400    pointer to a function.  */
1401 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
1402 #define TARGET_VTABLE_USES_DESCRIPTORS 0
1403 #endif
1404
1405 #ifndef SWITCHABLE_TARGET
1406 #define SWITCHABLE_TARGET 0
1407 #endif
1408
1409 #endif /* GCC_INSN_FLAGS_H  */
1410
1411 #endif  /* ! GCC_DEFAULTS_H */