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 SIZETYPE
 586 #define SIZETYPE SIZE_TYPE
 587 #endif
 588
 589 #ifndef PID_TYPE
 590 #define PID_TYPE "int"
 591 #endif
 592
 593 /* If GCC knows the exact uint_least16_t and uint_least32_t types from
 594    <stdint.h>, use them for char16_t and char32_t.  Otherwise, use
 595    these guesses; getting the wrong type of a given width will not
 596    affect C++ name mangling because in C++ these are distinct types
 597    not typedefs.  */
 598
 599 #ifdef UINT_LEAST16_TYPE
 600 #define CHAR16_TYPE UINT_LEAST16_TYPE
 601 #else
 602 #define CHAR16_TYPE "short unsigned int"
 603 #endif
 604
 605 #ifdef UINT_LEAST32_TYPE
 606 #define CHAR32_TYPE UINT_LEAST32_TYPE
 607 #else
 608 #define CHAR32_TYPE "unsigned int"
 609 #endif
 610
 611 #ifndef WCHAR_TYPE
 612 #define WCHAR_TYPE "int"
 613 #endif
 614
 615 /* WCHAR_TYPE gets overridden by -fshort-wchar.  */
 616 #define MODIFIED_WCHAR_TYPE \
 617         (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE)
 618
 619 #ifndef PTRDIFF_TYPE
 620 #define PTRDIFF_TYPE "long int"
 621 #endif
 622
 623 #ifndef WINT_TYPE
 624 #define WINT_TYPE "unsigned int"
 625 #endif
 626
 627 #ifndef INTMAX_TYPE
 628 #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)     \
 629                      ? "int"                                    \
 630                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 631                         ? "long int"                            \
 632                         : "long long int"))
 633 #endif
 634
 635 #ifndef UINTMAX_TYPE
 636 #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)    \
 637                      ? "unsigned int"                           \
 638                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 639                         ? "long unsigned int"                   \
 640                         : "long long unsigned int"))
 641 #endif
 642
 643
 644 /* There are no default definitions of these <stdint.h> types.  */
 645
 646 #ifndef SIG_ATOMIC_TYPE
 647 #define SIG_ATOMIC_TYPE ((const char *) NULL)
 648 #endif
 649
 650 #ifndef INT8_TYPE
 651 #define INT8_TYPE ((const char *) NULL)
 652 #endif
 653
 654 #ifndef INT16_TYPE
 655 #define INT16_TYPE ((const char *) NULL)
 656 #endif
 657
 658 #ifndef INT32_TYPE
 659 #define INT32_TYPE ((const char *) NULL)
 660 #endif
 661
 662 #ifndef INT64_TYPE
 663 #define INT64_TYPE ((const char *) NULL)
 664 #endif
 665
 666 #ifndef UINT8_TYPE
 667 #define UINT8_TYPE ((const char *) NULL)
 668 #endif
 669
 670 #ifndef UINT16_TYPE
 671 #define UINT16_TYPE ((const char *) NULL)
 672 #endif
 673
 674 #ifndef UINT32_TYPE
 675 #define UINT32_TYPE ((const char *) NULL)
 676 #endif
 677
 678 #ifndef UINT64_TYPE
 679 #define UINT64_TYPE ((const char *) NULL)
 680 #endif
 681
 682 #ifndef INT_LEAST8_TYPE
 683 #define INT_LEAST8_TYPE ((const char *) NULL)
 684 #endif
 685
 686 #ifndef INT_LEAST16_TYPE
 687 #define INT_LEAST16_TYPE ((const char *) NULL)
 688 #endif
 689
 690 #ifndef INT_LEAST32_TYPE
 691 #define INT_LEAST32_TYPE ((const char *) NULL)
 692 #endif
 693
 694 #ifndef INT_LEAST64_TYPE
 695 #define INT_LEAST64_TYPE ((const char *) NULL)
 696 #endif
 697
 698 #ifndef UINT_LEAST8_TYPE
 699 #define UINT_LEAST8_TYPE ((const char *) NULL)
 700 #endif
 701
 702 #ifndef UINT_LEAST16_TYPE
 703 #define UINT_LEAST16_TYPE ((const char *) NULL)
 704 #endif
 705
 706 #ifndef UINT_LEAST32_TYPE
 707 #define UINT_LEAST32_TYPE ((const char *) NULL)
 708 #endif
 709
 710 #ifndef UINT_LEAST64_TYPE
 711 #define UINT_LEAST64_TYPE ((const char *) NULL)
 712 #endif
 713
 714 #ifndef INT_FAST8_TYPE
 715 #define INT_FAST8_TYPE ((const char *) NULL)
 716 #endif
 717
 718 #ifndef INT_FAST16_TYPE
 719 #define INT_FAST16_TYPE ((const char *) NULL)
 720 #endif
 721
 722 #ifndef INT_FAST32_TYPE
 723 #define INT_FAST32_TYPE ((const char *) NULL)
 724 #endif
 725
 726 #ifndef INT_FAST64_TYPE
 727 #define INT_FAST64_TYPE ((const char *) NULL)
 728 #endif
 729
 730 #ifndef UINT_FAST8_TYPE
 731 #define UINT_FAST8_TYPE ((const char *) NULL)
 732 #endif
 733
 734 #ifndef UINT_FAST16_TYPE
 735 #define UINT_FAST16_TYPE ((const char *) NULL)
 736 #endif
 737
 738 #ifndef UINT_FAST32_TYPE
 739 #define UINT_FAST32_TYPE ((const char *) NULL)
 740 #endif
 741
 742 #ifndef UINT_FAST64_TYPE
 743 #define UINT_FAST64_TYPE ((const char *) NULL)
 744 #endif
 745
 746 #ifndef INTPTR_TYPE
 747 #define INTPTR_TYPE ((const char *) NULL)
 748 #endif
 749
 750 #ifndef UINTPTR_TYPE
 751 #define UINTPTR_TYPE ((const char *) NULL)
 752 #endif
 753
 754 /* Width in bits of a pointer.  Mind the value of the macro `Pmode'.  */
 755 #ifndef POINTER_SIZE
 756 #define POINTER_SIZE BITS_PER_WORD
 757 #endif
 758
 759 #ifndef PIC_OFFSET_TABLE_REGNUM
 760 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
 761 #endif
 762
 763 #ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
 764 #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 0
 765 #endif
 766
 767 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
 768 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
 769 #endif
 770
 771 #ifndef TARGET_DECLSPEC
 772 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
 773 /* If the target supports the "dllimport" attribute, users are
 774    probably used to the "__declspec" syntax.  */
 775 #define TARGET_DECLSPEC 1
 776 #else
 777 #define TARGET_DECLSPEC 0
 778 #endif
 779 #endif
 780
 781 /* By default, the preprocessor should be invoked the same way in C++
 782    as in C.  */
 783 #ifndef CPLUSPLUS_CPP_SPEC
 784 #ifdef CPP_SPEC
 785 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
 786 #endif
 787 #endif
 788
 789 #ifndef ACCUMULATE_OUTGOING_ARGS
 790 #define ACCUMULATE_OUTGOING_ARGS 0
 791 #endif
 792
 793 /* By default, use the GNU runtime for Objective C.  */
 794 #ifndef NEXT_OBJC_RUNTIME
 795 #define NEXT_OBJC_RUNTIME 0
 796 #endif
 797
 798 /* Supply a default definition for PUSH_ARGS.  */
 799 #ifndef PUSH_ARGS
 800 #ifdef PUSH_ROUNDING
 801 #define PUSH_ARGS       !ACCUMULATE_OUTGOING_ARGS
 802 #else
 803 #define PUSH_ARGS       0
 804 #endif
 805 #endif
 806
 807 /* Decide whether a function's arguments should be processed
 808    from first to last or from last to first.
 809
 810    They should if the stack and args grow in opposite directions, but
 811    only if we have push insns.  */
 812
 813 #ifdef PUSH_ROUNDING
 814
 815 #ifndef PUSH_ARGS_REVERSED
 816 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
 817 #define PUSH_ARGS_REVERSED  PUSH_ARGS
 818 #endif
 819 #endif
 820
 821 #endif
 822
 823 #ifndef PUSH_ARGS_REVERSED
 824 #define PUSH_ARGS_REVERSED 0
 825 #endif
 826
 827 /* Default value for the alignment (in bits) a C conformant malloc has to
 828    provide. This default is intended to be safe and always correct.  */
 829 #ifndef MALLOC_ABI_ALIGNMENT
 830 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
 831 #endif
 832
 833 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
 834    STACK_BOUNDARY is required.  */
 835 #ifndef PREFERRED_STACK_BOUNDARY
 836 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
 837 #endif
 838
 839 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not
 840    defined.  */
 841 #ifndef INCOMING_STACK_BOUNDARY
 842 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY
 843 #endif
 844
 845 #ifndef TARGET_DEFAULT_PACK_STRUCT
 846 #define TARGET_DEFAULT_PACK_STRUCT 0
 847 #endif
 848
 849 /* By default, the vtable entries are void pointers, the so the alignment
 850    is the same as pointer alignment.  The value of this macro specifies
 851    the alignment of the vtable entry in bits.  It should be defined only
 852    when special alignment is necessary.  */
 853 #ifndef TARGET_VTABLE_ENTRY_ALIGN
 854 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
 855 #endif
 856
 857 /* There are a few non-descriptor entries in the vtable at offsets below
 858    zero.  If these entries must be padded (say, to preserve the alignment
 859    specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
 860    words in each data entry.  */
 861 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
 862 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
 863 #endif
 864
 865 /* Decide whether it is safe to use a local alias for a virtual function
 866    when constructing thunks.  */
 867 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
 868 #ifdef ASM_OUTPUT_DEF
 869 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
 870 #else
 871 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
 872 #endif
 873 #endif
 874
 875 /* Select a format to encode pointers in exception handling data.  We
 876    prefer those that result in fewer dynamic relocations.  Assume no
 877    special support here and encode direct references.  */
 878 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
 879 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  DW_EH_PE_absptr
 880 #endif
 881
 882 /* By default, the C++ compiler will use the lowest bit of the pointer
 883    to function to indicate a pointer-to-member-function points to a
 884    virtual member function.  However, if FUNCTION_BOUNDARY indicates
 885    function addresses aren't always even, the lowest bit of the delta
 886    field will be used.  */
 887 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
 888 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
 889   (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
 890    ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
 891 #endif
 892
 893 #ifndef DEFAULT_GDB_EXTENSIONS
 894 #define DEFAULT_GDB_EXTENSIONS 1
 895 #endif
 896
 897 /* If more than one debugging type is supported, you must define
 898    PREFERRED_DEBUGGING_TYPE to choose the default.  */
 899
 900 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
 901          + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
 902          + defined (VMS_DEBUGGING_INFO))
 903 #ifndef PREFERRED_DEBUGGING_TYPE
 904 #error You must define PREFERRED_DEBUGGING_TYPE
 905 #endif /* no PREFERRED_DEBUGGING_TYPE */
 906
 907 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
 908    here so other code needn't care.  */
 909 #elif defined DBX_DEBUGGING_INFO
 910 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 911
 912 #elif defined SDB_DEBUGGING_INFO
 913 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
 914
 915 #elif defined DWARF2_DEBUGGING_INFO
 916 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 917
 918 #elif defined VMS_DEBUGGING_INFO
 919 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
 920
 921 #elif defined XCOFF_DEBUGGING_INFO
 922 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
 923
 924 #else
 925 /* No debugging format is supported by this target.  */
 926 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
 927 #endif
 928
 929 #ifndef LARGEST_EXPONENT_IS_NORMAL
 930 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
 931 #endif
 932
 933 #ifndef ROUND_TOWARDS_ZERO
 934 #define ROUND_TOWARDS_ZERO 0
 935 #endif
 936
 937 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
 938 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
 939 #endif
 940
 941 /* True if the targets integer-comparison functions return { 0, 1, 2
 942    } to indicate { <, ==, > }.  False if { -1, 0, 1 } is used
 943    instead.  The libgcc routines are biased.  */
 944 #ifndef TARGET_LIB_INT_CMP_BIASED
 945 #define TARGET_LIB_INT_CMP_BIASED (true)
 946 #endif
 947
 948 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
 949    then the word-endianness is the same as for integers.  */
 950 #ifndef FLOAT_WORDS_BIG_ENDIAN
 951 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 952 #endif
 953
 954 #ifndef REG_WORDS_BIG_ENDIAN
 955 #define REG_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 956 #endif
 957
 958 #ifdef TARGET_FLT_EVAL_METHOD
 959 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 1
 960 #else
 961 #define TARGET_FLT_EVAL_METHOD 0
 962 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 0
 963 #endif
 964
 965 #ifndef TARGET_DEC_EVAL_METHOD
 966 #define TARGET_DEC_EVAL_METHOD 2
 967 #endif
 968
 969 #ifndef HAS_LONG_COND_BRANCH
 970 #define HAS_LONG_COND_BRANCH 0
 971 #endif
 972
 973 #ifndef HAS_LONG_UNCOND_BRANCH
 974 #define HAS_LONG_UNCOND_BRANCH 0
 975 #endif
 976
 977 /* Determine whether __cxa_atexit, rather than atexit, is used to
 978    register C++ destructors for local statics and global objects.  */
 979 #ifndef DEFAULT_USE_CXA_ATEXIT
 980 #define DEFAULT_USE_CXA_ATEXIT 0
 981 #endif
 982
 983 /* If none of these macros are defined, the port must use the new
 984    technique of defining constraints in the machine description.
 985    tm_p.h will define those macros that machine-independent code
 986    still uses.  */
 987 #if  !defined CONSTRAINT_LEN                    \
 988   && !defined REG_CLASS_FROM_LETTER             \
 989   && !defined REG_CLASS_FROM_CONSTRAINT         \
 990   && !defined CONST_OK_FOR_LETTER_P             \
 991   && !defined CONST_OK_FOR_CONSTRAINT_P         \
 992   && !defined CONST_DOUBLE_OK_FOR_LETTER_P      \
 993   && !defined CONST_DOUBLE_OK_FOR_CONSTRAINT_P  \
 994   && !defined EXTRA_CONSTRAINT                  \
 995   && !defined EXTRA_CONSTRAINT_STR              \
 996   && !defined EXTRA_MEMORY_CONSTRAINT           \
 997   && !defined EXTRA_ADDRESS_CONSTRAINT
 998
 999 #define USE_MD_CONSTRAINTS
1000
1001 #if GCC_VERSION >= 3000 && defined IN_GCC
1002 /* These old constraint macros shouldn't appear anywhere in a
1003    configuration using MD constraint definitions.  */
1004 #pragma GCC poison REG_CLASS_FROM_LETTER CONST_OK_FOR_LETTER_P \
1005                    CONST_DOUBLE_OK_FOR_LETTER_P EXTRA_CONSTRAINT
1006 #endif
1007
1008 #else /* old constraint mechanism in use */
1009
1010 /* Determine whether extra constraint letter should be handled
1011    via address reload (like 'o').  */
1012 #ifndef EXTRA_MEMORY_CONSTRAINT
1013 #define EXTRA_MEMORY_CONSTRAINT(C,STR) 0
1014 #endif
1015
1016 /* Determine whether extra constraint letter should be handled
1017    as an address (like 'p').  */
1018 #ifndef EXTRA_ADDRESS_CONSTRAINT
1019 #define EXTRA_ADDRESS_CONSTRAINT(C,STR) 0
1020 #endif
1021
1022 /* When a port defines CONSTRAINT_LEN, it should use DEFAULT_CONSTRAINT_LEN
1023    for all the characters that it does not want to change, so things like the
1024   'length' of a digit in a matching constraint is an implementation detail,
1025    and not part of the interface.  */
1026 #define DEFAULT_CONSTRAINT_LEN(C,STR) 1
1027
1028 #ifndef CONSTRAINT_LEN
1029 #define CONSTRAINT_LEN(C,STR) DEFAULT_CONSTRAINT_LEN (C, STR)
1030 #endif
1031
1032 #if defined (CONST_OK_FOR_LETTER_P) && ! defined (CONST_OK_FOR_CONSTRAINT_P)
1033 #define CONST_OK_FOR_CONSTRAINT_P(VAL,C,STR) CONST_OK_FOR_LETTER_P (VAL, C)
1034 #endif
1035
1036 #if defined (CONST_DOUBLE_OK_FOR_LETTER_P) && ! defined (CONST_DOUBLE_OK_FOR_CONSTRAINT_P)
1037 #define CONST_DOUBLE_OK_FOR_CONSTRAINT_P(OP,C,STR) \
1038   CONST_DOUBLE_OK_FOR_LETTER_P (OP, C)
1039 #endif
1040
1041 #ifndef REG_CLASS_FROM_CONSTRAINT
1042 #define REG_CLASS_FROM_CONSTRAINT(C,STR) REG_CLASS_FROM_LETTER (C)
1043 #endif
1044
1045 #if defined (EXTRA_CONSTRAINT) && ! defined (EXTRA_CONSTRAINT_STR)
1046 #define EXTRA_CONSTRAINT_STR(OP, C,STR) EXTRA_CONSTRAINT (OP, C)
1047 #endif
1048
1049 #endif /* old constraint mechanism in use */
1050
1051 /* Determine whether the entire c99 runtime
1052    is present in the runtime library.  */
1053 #ifndef TARGET_C99_FUNCTIONS
1054 #define TARGET_C99_FUNCTIONS 0
1055 #endif
1056
1057 /* Determine whether the target runtime library has
1058    a sincos implementation following the GNU extension.  */
1059 #ifndef TARGET_HAS_SINCOS
1060 #define TARGET_HAS_SINCOS 0
1061 #endif
1062
1063 /* Indicate that CLZ and CTZ are undefined at zero.  */
1064 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
1065 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
1066 #endif
1067 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
1068 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
1069 #endif
1070
1071 /* Provide a default value for STORE_FLAG_VALUE.  */
1072 #ifndef STORE_FLAG_VALUE
1073 #define STORE_FLAG_VALUE  1
1074 #endif
1075
1076 /* This macro is used to determine what the largest unit size that
1077    move_by_pieces can use is.  */
1078
1079 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
1080    move efficiently, as opposed to  MOVE_MAX which is the maximum
1081    number of bytes we can move with a single instruction.  */
1082
1083 #ifndef MOVE_MAX_PIECES
1084 #define MOVE_MAX_PIECES   MOVE_MAX
1085 #endif
1086
1087 #ifndef MAX_MOVE_MAX
1088 #define MAX_MOVE_MAX MOVE_MAX
1089 #endif
1090
1091 #ifndef MIN_UNITS_PER_WORD
1092 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
1093 #endif
1094
1095 #ifndef MAX_BITS_PER_WORD
1096 #define MAX_BITS_PER_WORD BITS_PER_WORD
1097 #endif
1098
1099 #ifndef STACK_POINTER_OFFSET
1100 #define STACK_POINTER_OFFSET    0
1101 #endif
1102
1103 #ifndef LOCAL_REGNO
1104 #define LOCAL_REGNO(REGNO)  0
1105 #endif
1106
1107 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1108    the stack pointer does not matter.  The value is tested only in
1109    functions that have frame pointers.  */
1110 #ifndef EXIT_IGNORE_STACK
1111 #define EXIT_IGNORE_STACK 0
1112 #endif
1113
1114 /* Assume that case vectors are not pc-relative.  */
1115 #ifndef CASE_VECTOR_PC_RELATIVE
1116 #define CASE_VECTOR_PC_RELATIVE 0
1117 #endif
1118
1119 /* Assume that trampolines need function alignment.  */
1120 #ifndef TRAMPOLINE_ALIGNMENT
1121 #define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY
1122 #endif
1123
1124 /* Register mappings for target machines without register windows.  */
1125 #ifndef INCOMING_REGNO
1126 #define INCOMING_REGNO(N) (N)
1127 #endif
1128
1129 #ifndef OUTGOING_REGNO
1130 #define OUTGOING_REGNO(N) (N)
1131 #endif
1132
1133 #ifndef SHIFT_COUNT_TRUNCATED
1134 #define SHIFT_COUNT_TRUNCATED 0
1135 #endif
1136
1137 #ifndef LEGITIMATE_PIC_OPERAND_P
1138 #define LEGITIMATE_PIC_OPERAND_P(X) 1
1139 #endif
1140
1141 #ifndef TARGET_MEM_CONSTRAINT
1142 #define TARGET_MEM_CONSTRAINT 'm'
1143 #endif
1144
1145 #ifndef REVERSIBLE_CC_MODE
1146 #define REVERSIBLE_CC_MODE(MODE) 0
1147 #endif
1148
1149 /* Biggest alignment supported by the object file format of this machine.  */
1150 #ifndef MAX_OFILE_ALIGNMENT
1151 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
1152 #endif
1153
1154 #ifndef FRAME_GROWS_DOWNWARD
1155 #define FRAME_GROWS_DOWNWARD 0
1156 #endif
1157
1158 /* On most machines, the CFA coincides with the first incoming parm.  */
1159 #ifndef ARG_POINTER_CFA_OFFSET
1160 #define ARG_POINTER_CFA_OFFSET(FNDECL) \
1161   (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
1162 #endif
1163
1164 /* On most machines, we use the CFA as DW_AT_frame_base.  */
1165 #ifndef CFA_FRAME_BASE_OFFSET
1166 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0
1167 #endif
1168
1169 /* The offset from the incoming value of %sp to the top of the stack frame
1170    for the current function.  */
1171 #ifndef INCOMING_FRAME_SP_OFFSET
1172 #define INCOMING_FRAME_SP_OFFSET 0
1173 #endif
1174
1175 #ifndef HARD_REGNO_NREGS_HAS_PADDING
1176 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
1177 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
1178 #endif
1179
1180 #ifndef OUTGOING_REG_PARM_STACK_SPACE
1181 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
1182 #endif
1183
1184 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
1185    the backend.  MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
1186    effort stack alignment supported by the backend.  If the backend
1187    supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
1188    MAX_STACK_ALIGNMENT are the same.  Otherwise, the incoming stack
1189    boundary will limit the maximum guaranteed stack alignment.  */
1190 #ifdef MAX_STACK_ALIGNMENT
1191 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
1192 #else
1193 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY
1194 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
1195 #endif
1196
1197 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
1198
1199 #ifndef LOCAL_ALIGNMENT
1200 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
1201 #endif
1202
1203 #ifndef STACK_SLOT_ALIGNMENT
1204 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
1205   ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
1206 #endif
1207
1208 #ifndef LOCAL_DECL_ALIGNMENT
1209 #define LOCAL_DECL_ALIGNMENT(DECL) \
1210   LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
1211 #endif
1212
1213 #ifndef MINIMUM_ALIGNMENT
1214 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN)
1215 #endif
1216
1217 /* Alignment value for attribute ((aligned)).  */
1218 #ifndef ATTRIBUTE_ALIGNED_VALUE
1219 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
1220 #endif
1221
1222 /* Many ports have no mode-dependent addresses (except possibly autoincrement
1223    and autodecrement addresses, which are handled by target-independent code
1224    in recog.c).  */
1225 #ifndef GO_IF_MODE_DEPENDENT_ADDRESS
1226 #define GO_IF_MODE_DEPENDENT_ADDRESS(X, WIN)
1227 #endif
1228
1229 /* For most ports anything that evaluates to a constant symbolic
1230    or integer value is acceptable as a constant address.  */
1231 #ifndef CONSTANT_ADDRESS_P
1232 #define CONSTANT_ADDRESS_P(X)   (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE)
1233 #endif
1234
1235 #ifndef MAX_FIXED_MODE_SIZE
1236 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
1237 #endif
1238
1239 /* Nonzero if structures and unions should be returned in memory.
1240
1241    This should only be defined if compatibility with another compiler or
1242    with an ABI is needed, because it results in slower code.  */
1243
1244 #ifndef DEFAULT_PCC_STRUCT_RETURN
1245 #define DEFAULT_PCC_STRUCT_RETURN 1
1246 #endif
1247
1248 #ifdef GCC_INSN_FLAGS_H
1249 /* Dependent default target macro definitions
1250
1251    This section of defaults.h defines target macros that depend on generated
1252    headers.  This is a bit awkward:  We want to put all default definitions
1253    for target macros in defaults.h, but some of the defaults depend on the
1254    HAVE_* flags defines of insn-flags.h.  But insn-flags.h is not always
1255    included by files that do include defaults.h.
1256
1257    Fortunately, the default macro definitions that depend on the HAVE_*
1258    macros are also the ones that will only be used inside GCC itself, i.e.
1259    not in the gen* programs or in target objects like libgcc.
1260
1261    Obviously, it would be best to keep this section of defaults.h as small
1262    as possible, by converting the macros defined below to target hooks or
1263    functions.
1264 */
1265
1266 /* The default branch cost is 1.  */
1267 #ifndef BRANCH_COST
1268 #define BRANCH_COST(speed_p, predictable_p) 1
1269 #endif
1270
1271 /* If a memory-to-memory move would take MOVE_RATIO or more simple
1272    move-instruction sequences, we will do a movmem or libcall instead.  */
1273
1274 #ifndef MOVE_RATIO
1275 #if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti)
1276 #define MOVE_RATIO(speed) 2
1277 #else
1278 /* If we are optimizing for space (-Os), cut down the default move ratio.  */
1279 #define MOVE_RATIO(speed) ((speed) ? 15 : 3)
1280 #endif
1281 #endif
1282
1283 /* If a clear memory operation would take CLEAR_RATIO or more simple
1284    move-instruction sequences, we will do a setmem or libcall instead.  */
1285
1286 #ifndef CLEAR_RATIO
1287 #if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
1288 #define CLEAR_RATIO(speed) 2
1289 #else
1290 /* If we are optimizing for space, cut down the default clear ratio.  */
1291 #define CLEAR_RATIO(speed) ((speed) ? 15 :3)
1292 #endif
1293 #endif
1294
1295 /* If a memory set (to value other than zero) operation would take
1296    SET_RATIO or more simple move-instruction sequences, we will do a movmem
1297    or libcall instead.  */
1298 #ifndef SET_RATIO
1299 #define SET_RATIO(speed) MOVE_RATIO(speed)
1300 #endif
1301
1302 /* Supply a default definition for FUNCTION_ARG_PADDING:
1303    usually pad upward, but pad short args downward on
1304    big-endian machines.  */
1305
1306 #define DEFAULT_FUNCTION_ARG_PADDING(MODE, TYPE)                        \
1307   (! BYTES_BIG_ENDIAN                                                   \
1308    ? upward                                                             \
1309    : (((MODE) == BLKmode                                                \
1310        ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST         \
1311           && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \
1312        : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY)                       \
1313       ? downward : upward))
1314
1315 #ifndef FUNCTION_ARG_PADDING
1316 #define FUNCTION_ARG_PADDING(MODE, TYPE)        \
1317   DEFAULT_FUNCTION_ARG_PADDING ((MODE), (TYPE))
1318 #endif
1319
1320 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
1321    Normally move_insn, so Pmode stack pointer.  */
1322
1323 #ifndef STACK_SAVEAREA_MODE
1324 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
1325 #endif
1326
1327 /* Supply a default definition of STACK_SIZE_MODE for
1328    allocate_dynamic_stack_space.  Normally PLUS/MINUS, so word_mode.  */
1329
1330 #ifndef STACK_SIZE_MODE
1331 #define STACK_SIZE_MODE word_mode
1332 #endif
1333
1334 /* Provide default values for the macros controlling stack checking.  */
1335
1336 /* The default is neither full builtin stack checking...  */
1337 #ifndef STACK_CHECK_BUILTIN
1338 #define STACK_CHECK_BUILTIN 0
1339 #endif
1340
1341 /* ...nor static builtin stack checking.  */
1342 #ifndef STACK_CHECK_STATIC_BUILTIN
1343 #define STACK_CHECK_STATIC_BUILTIN 0
1344 #endif
1345
1346 /* The default interval is one page (4096 bytes).  */
1347 #ifndef STACK_CHECK_PROBE_INTERVAL_EXP
1348 #define STACK_CHECK_PROBE_INTERVAL_EXP 12
1349 #endif
1350
1351 /* The default is not to move the stack pointer.  */
1352 #ifndef STACK_CHECK_MOVING_SP
1353 #define STACK_CHECK_MOVING_SP 0
1354 #endif
1355
1356 /* This is a kludge to try to capture the discrepancy between the old
1357    mechanism (generic stack checking) and the new mechanism (static
1358    builtin stack checking).  STACK_CHECK_PROTECT needs to be bumped
1359    for the latter because part of the protection area is effectively
1360    included in STACK_CHECK_MAX_FRAME_SIZE for the former.  */
1361 #ifdef STACK_CHECK_PROTECT
1362 #define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
1363 #else
1364 #define STACK_OLD_CHECK_PROTECT                                         \
1365  (targetm_common.except_unwind_info (&global_options) == UI_SJLJ        \
1366   ? 75 * UNITS_PER_WORD                                                 \
1367   : 8 * 1024)
1368 #endif
1369
1370 /* Minimum amount of stack required to recover from an anticipated stack
1371    overflow detection.  The default value conveys an estimate of the amount
1372    of stack required to propagate an exception.  */
1373 #ifndef STACK_CHECK_PROTECT
1374 #define STACK_CHECK_PROTECT                                             \
1375  (targetm_common.except_unwind_info (&global_options) == UI_SJLJ        \
1376   ? 75 * UNITS_PER_WORD                                                 \
1377   : 12 * 1024)
1378 #endif
1379
1380 /* Make the maximum frame size be the largest we can and still only need
1381    one probe per function.  */
1382 #ifndef STACK_CHECK_MAX_FRAME_SIZE
1383 #define STACK_CHECK_MAX_FRAME_SIZE \
1384   ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD)
1385 #endif
1386
1387 /* This is arbitrary, but should be large enough everywhere.  */
1388 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
1389 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
1390 #endif
1391
1392 /* Provide a reasonable default for the maximum size of an object to
1393    allocate in the fixed frame.  We may need to be able to make this
1394    controllable by the user at some point.  */
1395 #ifndef STACK_CHECK_MAX_VAR_SIZE
1396 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
1397 #endif
1398
1399 /* By default, the C++ compiler will use function addresses in the
1400    vtable entries.  Setting this nonzero tells the compiler to use
1401    function descriptors instead.  The value of this macro says how
1402    many words wide the descriptor is (normally 2).  It is assumed
1403    that the address of a function descriptor may be treated as a
1404    pointer to a function.  */
1405 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
1406 #define TARGET_VTABLE_USES_DESCRIPTORS 0
1407 #endif
1408
1409 #ifndef SWITCHABLE_TARGET
1410 #define SWITCHABLE_TARGET 0
1411 #endif
1412
1413 #endif /* GCC_INSN_FLAGS_H  */
1414
1415 #endif  /* ! GCC_DEFAULTS_H */