gcc/defaults.h

   1 /* Definitions of various defaults for tm.h macros.
   2    Copyright (C) 1992-2015 Free Software Foundation, Inc.
   3    Contributed by Ron Guilmette (rfg@monkeys.com)
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 3, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  26 #ifndef GCC_DEFAULTS_H
  27 #define GCC_DEFAULTS_H
  28
  29 /* How to start an assembler comment.  */
  30 #ifndef ASM_COMMENT_START
  31 #define ASM_COMMENT_START ";#"
  32 #endif
  33
  34 /* Store in OUTPUT a string (made with alloca) containing an
  35    assembler-name for a local static variable or function named NAME.
  36    LABELNO is an integer which is different for each call.  */
  37
  38 #ifndef ASM_PN_FORMAT
  39 # ifndef NO_DOT_IN_LABEL
  40 #  define ASM_PN_FORMAT "%s.%lu"
  41 # else
  42 #  ifndef NO_DOLLAR_IN_LABEL
  43 #   define ASM_PN_FORMAT "%s$%lu"
  44 #  else
  45 #   define ASM_PN_FORMAT "__%s_%lu"
  46 #  endif
  47 # endif
  48 #endif /* ! ASM_PN_FORMAT */
  49
  50 #ifndef ASM_FORMAT_PRIVATE_NAME
  51 # define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
  52   do { const char *const name_ = (NAME); \
  53        char *const output_ = (OUTPUT) = \
  54          (char *) alloca (strlen (name_) + 32); \
  55        sprintf (output_, ASM_PN_FORMAT, name_, (unsigned long)(LABELNO)); \
  56   } while (0)
  57 #endif
  58
  59 /* Choose a reasonable default for ASM_OUTPUT_ASCII.  */
  60
  61 #ifndef ASM_OUTPUT_ASCII
  62 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
  63   do {                                                                        \
  64     FILE *_hide_asm_out_file = (MYFILE);                                      \
  65     const unsigned char *_hide_p = (const unsigned char *) (MYSTRING);        \
  66     int _hide_thissize = (MYLENGTH);                                          \
  67     {                                                                         \
  68       FILE *asm_out_file = _hide_asm_out_file;                                \
  69       const unsigned char *p = _hide_p;                                       \
  70       int thissize = _hide_thissize;                                          \
  71       int i;                                                                  \
  72       fprintf (asm_out_file, "\t.ascii \"");                                  \
  73                                                                               \
  74       for (i = 0; i < thissize; i++)                                          \
  75         {                                                                     \
  76           int c = p[i];                                                       \
  77           if (c == '\"' || c == '\\')                                         \
  78             putc ('\\', asm_out_file);                                        \
  79           if (ISPRINT (c))                                                    \
  80             putc (c, asm_out_file);                                           \
  81           else                                                                \
  82             {                                                                 \
  83               fprintf (asm_out_file, "\\%o", c);                              \
  84               /* After an octal-escape, if a digit follows,                   \
  85                  terminate one string constant and start another.             \
  86                  The VAX assembler fails to stop reading the escape           \
  87                  after three digits, so this is the only way we               \
  88                  can get it to parse the data properly.  */                   \
  89               if (i < thissize - 1 && ISDIGIT (p[i + 1]))                     \
  90                 fprintf (asm_out_file, "\"\n\t.ascii \"");                    \
  91           }                                                                   \
  92         }                                                                     \
  93       fprintf (asm_out_file, "\"\n");                                         \
  94     }                                                                         \
  95   }                                                                           \
  96   while (0)
  97 #endif
  98
  99 /* This is how we tell the assembler to equate two values.  */
 100 #ifdef SET_ASM_OP
 101 #ifndef ASM_OUTPUT_DEF
 102 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
 103  do {   fprintf ((FILE), "%s", SET_ASM_OP);                             \
 104         assemble_name (FILE, LABEL1);                                   \
 105         fprintf (FILE, ",");                                            \
 106         assemble_name (FILE, LABEL2);                                   \
 107         fprintf (FILE, "\n");                                           \
 108   } while (0)
 109 #endif
 110 #endif
 111
 112 #ifndef IFUNC_ASM_TYPE
 113 #define IFUNC_ASM_TYPE "gnu_indirect_function"
 114 #endif
 115
 116 #ifndef TLS_COMMON_ASM_OP
 117 #define TLS_COMMON_ASM_OP ".tls_common"
 118 #endif
 119
 120 #if defined (HAVE_AS_TLS) && !defined (ASM_OUTPUT_TLS_COMMON)
 121 #define ASM_OUTPUT_TLS_COMMON(FILE, DECL, NAME, SIZE)                   \
 122   do                                                                    \
 123     {                                                                   \
 124       fprintf ((FILE), "\t%s\t", TLS_COMMON_ASM_OP);                    \
 125       assemble_name ((FILE), (NAME));                                   \
 126       fprintf ((FILE), "," HOST_WIDE_INT_PRINT_UNSIGNED",%u\n",         \
 127                (SIZE), DECL_ALIGN (DECL) / BITS_PER_UNIT);              \
 128     }                                                                   \
 129   while (0)
 130 #endif
 131
 132 /* Decide whether to defer emitting the assembler output for an equate
 133    of two values.  The default is to not defer output.  */
 134 #ifndef TARGET_DEFERRED_OUTPUT_DEFS
 135 #define TARGET_DEFERRED_OUTPUT_DEFS(DECL,TARGET) false
 136 #endif
 137
 138 /* This is how to output the definition of a user-level label named
 139    NAME, such as the label on variable NAME.  */
 140
 141 #ifndef ASM_OUTPUT_LABEL
 142 #define ASM_OUTPUT_LABEL(FILE,NAME) \
 143   do {                                          \
 144     assemble_name ((FILE), (NAME));             \
 145     fputs (":\n", (FILE));                      \
 146   } while (0)
 147 #endif
 148
 149 /* This is how to output the definition of a user-level label named
 150    NAME, such as the label on a function.  */
 151
 152 #ifndef ASM_OUTPUT_FUNCTION_LABEL
 153 #define ASM_OUTPUT_FUNCTION_LABEL(FILE, NAME, DECL) \
 154   ASM_OUTPUT_LABEL ((FILE), (NAME))
 155 #endif
 156
 157 /* Output the definition of a compiler-generated label named NAME.  */
 158 #ifndef ASM_OUTPUT_INTERNAL_LABEL
 159 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,NAME)    \
 160   do {                                          \
 161     assemble_name_raw ((FILE), (NAME));         \
 162     fputs (":\n", (FILE));                      \
 163   } while (0)
 164 #endif
 165
 166 /* This is how to output a reference to a user-level label named NAME.  */
 167
 168 #ifndef ASM_OUTPUT_LABELREF
 169 #define ASM_OUTPUT_LABELREF(FILE,NAME)  \
 170   do {                                                  \
 171     fputs (user_label_prefix, (FILE));                  \
 172     fputs ((NAME), (FILE));                             \
 173   } while (0);
 174 #endif
 175
 176 /* Allow target to print debug info labels specially.  This is useful for
 177    VLIW targets, since debug info labels should go into the middle of
 178    instruction bundles instead of breaking them.  */
 179
 180 #ifndef ASM_OUTPUT_DEBUG_LABEL
 181 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
 182   (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM)
 183 #endif
 184
 185 /* This is how we tell the assembler that a symbol is weak.  */
 186 #ifndef ASM_OUTPUT_WEAK_ALIAS
 187 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
 188 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE)      \
 189   do                                                    \
 190     {                                                   \
 191       ASM_WEAKEN_LABEL (STREAM, NAME);                  \
 192       if (VALUE)                                        \
 193         ASM_OUTPUT_DEF (STREAM, NAME, VALUE);           \
 194     }                                                   \
 195   while (0)
 196 #endif
 197 #endif
 198
 199 /* This is how we tell the assembler that a symbol is a weak alias to
 200    another symbol that doesn't require the other symbol to be defined.
 201    Uses of the former will turn into weak uses of the latter, i.e.,
 202    uses that, in case the latter is undefined, will not cause errors,
 203    and will add it to the symbol table as weak undefined.  However, if
 204    the latter is referenced directly, a strong reference prevails.  */
 205 #ifndef ASM_OUTPUT_WEAKREF
 206 #if defined HAVE_GAS_WEAKREF
 207 #define ASM_OUTPUT_WEAKREF(FILE, DECL, NAME, VALUE)                     \
 208   do                                                                    \
 209     {                                                                   \
 210       fprintf ((FILE), "\t.weakref\t");                                 \
 211       assemble_name ((FILE), (NAME));                                   \
 212       fprintf ((FILE), ",");                                            \
 213       assemble_name ((FILE), (VALUE));                                  \
 214       fprintf ((FILE), "\n");                                           \
 215     }                                                                   \
 216   while (0)
 217 #endif
 218 #endif
 219
 220 /* How to emit a .type directive.  */
 221 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE
 222 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT
 223 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE)   \
 224   do                                                    \
 225     {                                                   \
 226       fputs (TYPE_ASM_OP, STREAM);                      \
 227       assemble_name (STREAM, NAME);                     \
 228       fputs (", ", STREAM);                             \
 229       fprintf (STREAM, TYPE_OPERAND_FMT, TYPE);         \
 230       putc ('\n', STREAM);                              \
 231     }                                                   \
 232   while (0)
 233 #endif
 234 #endif
 235
 236 /* How to emit a .size directive.  */
 237 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE
 238 #ifdef SIZE_ASM_OP
 239 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE)   \
 240   do                                                    \
 241     {                                                   \
 242       HOST_WIDE_INT size_ = (SIZE);                     \
 243       fputs (SIZE_ASM_OP, STREAM);                      \
 244       assemble_name (STREAM, NAME);                     \
 245       fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \
 246     }                                                   \
 247   while (0)
 248
 249 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME)          \
 250   do                                                    \
 251     {                                                   \
 252       fputs (SIZE_ASM_OP, STREAM);                      \
 253       assemble_name (STREAM, NAME);                     \
 254       fputs (", .-", STREAM);                           \
 255       assemble_name (STREAM, NAME);                     \
 256       putc ('\n', STREAM);                              \
 257     }                                                   \
 258   while (0)
 259
 260 #endif
 261 #endif
 262
 263 /* This determines whether or not we support weak symbols.  SUPPORTS_WEAK
 264    must be a preprocessor constant.  */
 265 #ifndef SUPPORTS_WEAK
 266 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
 267 #define SUPPORTS_WEAK 1
 268 #else
 269 #define SUPPORTS_WEAK 0
 270 #endif
 271 #endif
 272
 273 /* This determines whether or not we support weak symbols during target
 274    code generation.  TARGET_SUPPORTS_WEAK can be any valid C expression.  */
 275 #ifndef TARGET_SUPPORTS_WEAK
 276 #define TARGET_SUPPORTS_WEAK (SUPPORTS_WEAK)
 277 #endif
 278
 279 /* This determines whether or not we support the discriminator
 280    attribute in the .loc directive.  */
 281 #ifndef SUPPORTS_DISCRIMINATOR
 282 #ifdef HAVE_GAS_DISCRIMINATOR
 283 #define SUPPORTS_DISCRIMINATOR 1
 284 #else
 285 #define SUPPORTS_DISCRIMINATOR 0
 286 #endif
 287 #endif
 288
 289 /* This determines whether or not we support link-once semantics.  */
 290 #ifndef SUPPORTS_ONE_ONLY
 291 #ifdef MAKE_DECL_ONE_ONLY
 292 #define SUPPORTS_ONE_ONLY 1
 293 #else
 294 #define SUPPORTS_ONE_ONLY 0
 295 #endif
 296 #endif
 297
 298 /* This determines whether weak symbols must be left out of a static
 299    archive's table of contents.  Defining this macro to be nonzero has
 300    the consequence that certain symbols will not be made weak that
 301    otherwise would be.  The C++ ABI requires this macro to be zero;
 302    see the documentation.  */
 303 #ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 304 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
 305 #endif
 306
 307 /* This determines whether or not we need linkonce unwind information.  */
 308 #ifndef TARGET_USES_WEAK_UNWIND_INFO
 309 #define TARGET_USES_WEAK_UNWIND_INFO 0
 310 #endif
 311
 312 /* By default, there is no prefix on user-defined symbols.  */
 313 #ifndef USER_LABEL_PREFIX
 314 #define USER_LABEL_PREFIX ""
 315 #endif
 316
 317 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
 318    provide a weak attribute.  Else define it to nothing.
 319
 320    This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
 321    not available at that time.
 322
 323    Note, this is only for use by target files which we know are to be
 324    compiled by GCC.  */
 325 #ifndef TARGET_ATTRIBUTE_WEAK
 326 # if SUPPORTS_WEAK
 327 #  define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
 328 # else
 329 #  define TARGET_ATTRIBUTE_WEAK
 330 # endif
 331 #endif
 332
 333 /* By default we can assume that all global symbols are in one namespace,
 334    across all shared libraries.  */
 335 #ifndef MULTIPLE_SYMBOL_SPACES
 336 # define MULTIPLE_SYMBOL_SPACES 0
 337 #endif
 338
 339 /* If the target supports init_priority C++ attribute, give
 340    SUPPORTS_INIT_PRIORITY a nonzero value.  */
 341 #ifndef SUPPORTS_INIT_PRIORITY
 342 #define SUPPORTS_INIT_PRIORITY 1
 343 #endif /* SUPPORTS_INIT_PRIORITY */
 344
 345 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
 346    the rest of the DWARF 2 frame unwind support is also provided.  */
 347 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
 348 #define DWARF2_UNWIND_INFO 1
 349 #endif
 350
 351 /* If we have named sections, and we're using crtstuff to run ctors,
 352    use them for registering eh frame information.  */
 353 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
 354     && !defined (EH_FRAME_IN_DATA_SECTION)
 355 #ifndef EH_FRAME_SECTION_NAME
 356 #define EH_FRAME_SECTION_NAME ".eh_frame"
 357 #endif
 358 #endif
 359
 360 /* On many systems, different EH table encodings are used under
 361    difference circumstances.  Some will require runtime relocations;
 362    some will not.  For those that do not require runtime relocations,
 363    we would like to make the table read-only.  However, since the
 364    read-only tables may need to be combined with read-write tables
 365    that do require runtime relocation, it is not safe to make the
 366    tables read-only unless the linker will merge read-only and
 367    read-write sections into a single read-write section.  If your
 368    linker does not have this ability, but your system is such that no
 369    encoding used with non-PIC code will ever require a runtime
 370    relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in
 371    your target configuration file.  */
 372 #ifndef EH_TABLES_CAN_BE_READ_ONLY
 373 #ifdef HAVE_LD_RO_RW_SECTION_MIXING
 374 #define EH_TABLES_CAN_BE_READ_ONLY 1
 375 #else
 376 #define EH_TABLES_CAN_BE_READ_ONLY 0
 377 #endif
 378 #endif
 379
 380 /* Provide defaults for stuff that may not be defined when using
 381    sjlj exceptions.  */
 382 #ifndef EH_RETURN_DATA_REGNO
 383 #define EH_RETURN_DATA_REGNO(N) INVALID_REGNUM
 384 #endif
 385
 386 /* Offset between the eh handler address and entry in eh tables.  */
 387 #ifndef RETURN_ADDR_OFFSET
 388 #define RETURN_ADDR_OFFSET 0
 389 #endif
 390
 391 #ifndef MASK_RETURN_ADDR
 392 #define MASK_RETURN_ADDR NULL_RTX
 393 #endif
 394
 395 /* If we have named section and we support weak symbols, then use the
 396    .jcr section for recording java classes which need to be registered
 397    at program start-up time.  */
 398 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
 399 #ifndef JCR_SECTION_NAME
 400 #define JCR_SECTION_NAME ".jcr"
 401 #endif
 402 #endif
 403
 404 /* This decision to use a .jcr section can be overridden by defining
 405    USE_JCR_SECTION to 0 in target file.  This is necessary if target
 406    can define JCR_SECTION_NAME but does not have crtstuff or
 407    linker support for .jcr section.  */
 408 #ifndef TARGET_USE_JCR_SECTION
 409 #ifdef JCR_SECTION_NAME
 410 #define TARGET_USE_JCR_SECTION 1
 411 #else
 412 #define TARGET_USE_JCR_SECTION 0
 413 #endif
 414 #endif
 415
 416 /* Number of hardware registers that go into the DWARF-2 unwind info.
 417    If not defined, equals FIRST_PSEUDO_REGISTER  */
 418
 419 #ifndef DWARF_FRAME_REGISTERS
 420 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
 421 #endif
 422
 423 /* Offsets recorded in opcodes are a multiple of this alignment factor.  */
 424 #ifndef DWARF_CIE_DATA_ALIGNMENT
 425 #ifdef STACK_GROWS_DOWNWARD
 426 #define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD))
 427 #else
 428 #define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD)
 429 #endif
 430 #endif
 431
 432 /* The DWARF 2 CFA column which tracks the return address.  Normally this
 433    is the column for PC, or the first column after all of the hard
 434    registers.  */
 435 #ifndef DWARF_FRAME_RETURN_COLUMN
 436 #ifdef PC_REGNUM
 437 #define DWARF_FRAME_RETURN_COLUMN       DWARF_FRAME_REGNUM (PC_REGNUM)
 438 #else
 439 #define DWARF_FRAME_RETURN_COLUMN       DWARF_FRAME_REGISTERS
 440 #endif
 441 #endif
 442
 443 /* How to renumber registers for dbx and gdb.  If not defined, assume
 444    no renumbering is necessary.  */
 445
 446 #ifndef DBX_REGISTER_NUMBER
 447 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 448 #endif
 449
 450 /* The mapping from gcc register number to DWARF 2 CFA column number.
 451    By default, we just provide columns for all registers.  */
 452 #ifndef DWARF_FRAME_REGNUM
 453 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
 454 #endif
 455
 456 /* The mapping from dwarf CFA reg number to internal dwarf reg numbers.  */
 457 #ifndef DWARF_REG_TO_UNWIND_COLUMN
 458 #define DWARF_REG_TO_UNWIND_COLUMN(REGNO) (REGNO)
 459 #endif
 460
 461 /* Map register numbers held in the call frame info that gcc has
 462    collected using DWARF_FRAME_REGNUM to those that should be output in
 463    .debug_frame and .eh_frame.  */
 464 #ifndef DWARF2_FRAME_REG_OUT
 465 #define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) (REGNO)
 466 #endif
 467
 468 /* The size of addresses as they appear in the Dwarf 2 data.
 469    Some architectures use word addresses to refer to code locations,
 470    but Dwarf 2 info always uses byte addresses.  On such machines,
 471    Dwarf 2 addresses need to be larger than the architecture's
 472    pointers.  */
 473 #ifndef DWARF2_ADDR_SIZE
 474 #define DWARF2_ADDR_SIZE ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)
 475 #endif
 476
 477 /* The size in bytes of a DWARF field indicating an offset or length
 478    relative to a debug info section, specified to be 4 bytes in the
 479    DWARF-2 specification.  The SGI/MIPS ABI defines it to be the same
 480    as PTR_SIZE.  */
 481 #ifndef DWARF_OFFSET_SIZE
 482 #define DWARF_OFFSET_SIZE 4
 483 #endif
 484
 485 /* The size in bytes of a DWARF 4 type signature.  */
 486 #ifndef DWARF_TYPE_SIGNATURE_SIZE
 487 #define DWARF_TYPE_SIGNATURE_SIZE 8
 488 #endif
 489
 490 /* Default sizes for base C types.  If the sizes are different for
 491    your target, you should override these values by defining the
 492    appropriate symbols in your tm.h file.  */
 493
 494 #if BITS_PER_UNIT == 8
 495 #define LOG2_BITS_PER_UNIT 3
 496 #elif BITS_PER_UNIT == 16
 497 #define LOG2_BITS_PER_UNIT 4
 498 #else
 499 #error Unknown BITS_PER_UNIT
 500 #endif
 501
 502 #ifndef BITS_PER_WORD
 503 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
 504 #endif
 505
 506 #ifndef CHAR_TYPE_SIZE
 507 #define CHAR_TYPE_SIZE BITS_PER_UNIT
 508 #endif
 509
 510 #ifndef BOOL_TYPE_SIZE
 511 /* `bool' has size and alignment `1', on almost all platforms.  */
 512 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
 513 #endif
 514
 515 #ifndef SHORT_TYPE_SIZE
 516 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
 517 #endif
 518
 519 #ifndef INT_TYPE_SIZE
 520 #define INT_TYPE_SIZE BITS_PER_WORD
 521 #endif
 522
 523 #ifndef LONG_TYPE_SIZE
 524 #define LONG_TYPE_SIZE BITS_PER_WORD
 525 #endif
 526
 527 #ifndef LONG_LONG_TYPE_SIZE
 528 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
 529 #endif
 530
 531 #ifndef WCHAR_TYPE_SIZE
 532 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
 533 #endif
 534
 535 #ifndef FLOAT_TYPE_SIZE
 536 #define FLOAT_TYPE_SIZE BITS_PER_WORD
 537 #endif
 538
 539 #ifndef DOUBLE_TYPE_SIZE
 540 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 541 #endif
 542
 543 #ifndef LONG_DOUBLE_TYPE_SIZE
 544 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 545 #endif
 546
 547 #ifndef DECIMAL32_TYPE_SIZE
 548 #define DECIMAL32_TYPE_SIZE 32
 549 #endif
 550
 551 #ifndef DECIMAL64_TYPE_SIZE
 552 #define DECIMAL64_TYPE_SIZE 64
 553 #endif
 554
 555 #ifndef DECIMAL128_TYPE_SIZE
 556 #define DECIMAL128_TYPE_SIZE 128
 557 #endif
 558
 559 #ifndef SHORT_FRACT_TYPE_SIZE
 560 #define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT
 561 #endif
 562
 563 #ifndef FRACT_TYPE_SIZE
 564 #define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2)
 565 #endif
 566
 567 #ifndef LONG_FRACT_TYPE_SIZE
 568 #define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4)
 569 #endif
 570
 571 #ifndef LONG_LONG_FRACT_TYPE_SIZE
 572 #define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8)
 573 #endif
 574
 575 #ifndef SHORT_ACCUM_TYPE_SIZE
 576 #define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2)
 577 #endif
 578
 579 #ifndef ACCUM_TYPE_SIZE
 580 #define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2)
 581 #endif
 582
 583 #ifndef LONG_ACCUM_TYPE_SIZE
 584 #define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2)
 585 #endif
 586
 587 #ifndef LONG_LONG_ACCUM_TYPE_SIZE
 588 #define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2)
 589 #endif
 590
 591 /* We let tm.h override the types used here, to handle trivial differences
 592    such as the choice of unsigned int or long unsigned int for size_t.
 593    When machines start needing nontrivial differences in the size type,
 594    it would be best to do something here to figure out automatically
 595    from other information what type to use.  */
 596
 597 #ifndef SIZE_TYPE
 598 #define SIZE_TYPE "long unsigned int"
 599 #endif
 600
 601 #ifndef SIZETYPE
 602 #define SIZETYPE SIZE_TYPE
 603 #endif
 604
 605 #ifndef PID_TYPE
 606 #define PID_TYPE "int"
 607 #endif
 608
 609 /* If GCC knows the exact uint_least16_t and uint_least32_t types from
 610    <stdint.h>, use them for char16_t and char32_t.  Otherwise, use
 611    these guesses; getting the wrong type of a given width will not
 612    affect C++ name mangling because in C++ these are distinct types
 613    not typedefs.  */
 614
 615 #ifdef UINT_LEAST16_TYPE
 616 #define CHAR16_TYPE UINT_LEAST16_TYPE
 617 #else
 618 #define CHAR16_TYPE "short unsigned int"
 619 #endif
 620
 621 #ifdef UINT_LEAST32_TYPE
 622 #define CHAR32_TYPE UINT_LEAST32_TYPE
 623 #else
 624 #define CHAR32_TYPE "unsigned int"
 625 #endif
 626
 627 #ifndef WCHAR_TYPE
 628 #define WCHAR_TYPE "int"
 629 #endif
 630
 631 /* WCHAR_TYPE gets overridden by -fshort-wchar.  */
 632 #define MODIFIED_WCHAR_TYPE \
 633         (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE)
 634
 635 #ifndef PTRDIFF_TYPE
 636 #define PTRDIFF_TYPE "long int"
 637 #endif
 638
 639 #ifndef WINT_TYPE
 640 #define WINT_TYPE "unsigned int"
 641 #endif
 642
 643 #ifndef INTMAX_TYPE
 644 #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)     \
 645                      ? "int"                                    \
 646                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 647                         ? "long int"                            \
 648                         : "long long int"))
 649 #endif
 650
 651 #ifndef UINTMAX_TYPE
 652 #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)    \
 653                      ? "unsigned int"                           \
 654                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 655                         ? "long unsigned int"                   \
 656                         : "long long unsigned int"))
 657 #endif
 658
 659
 660 /* There are no default definitions of these <stdint.h> types.  */
 661
 662 #ifndef SIG_ATOMIC_TYPE
 663 #define SIG_ATOMIC_TYPE ((const char *) NULL)
 664 #endif
 665
 666 #ifndef INT8_TYPE
 667 #define INT8_TYPE ((const char *) NULL)
 668 #endif
 669
 670 #ifndef INT16_TYPE
 671 #define INT16_TYPE ((const char *) NULL)
 672 #endif
 673
 674 #ifndef INT32_TYPE
 675 #define INT32_TYPE ((const char *) NULL)
 676 #endif
 677
 678 #ifndef INT64_TYPE
 679 #define INT64_TYPE ((const char *) NULL)
 680 #endif
 681
 682 #ifndef UINT8_TYPE
 683 #define UINT8_TYPE ((const char *) NULL)
 684 #endif
 685
 686 #ifndef UINT16_TYPE
 687 #define UINT16_TYPE ((const char *) NULL)
 688 #endif
 689
 690 #ifndef UINT32_TYPE
 691 #define UINT32_TYPE ((const char *) NULL)
 692 #endif
 693
 694 #ifndef UINT64_TYPE
 695 #define UINT64_TYPE ((const char *) NULL)
 696 #endif
 697
 698 #ifndef INT_LEAST8_TYPE
 699 #define INT_LEAST8_TYPE ((const char *) NULL)
 700 #endif
 701
 702 #ifndef INT_LEAST16_TYPE
 703 #define INT_LEAST16_TYPE ((const char *) NULL)
 704 #endif
 705
 706 #ifndef INT_LEAST32_TYPE
 707 #define INT_LEAST32_TYPE ((const char *) NULL)
 708 #endif
 709
 710 #ifndef INT_LEAST64_TYPE
 711 #define INT_LEAST64_TYPE ((const char *) NULL)
 712 #endif
 713
 714 #ifndef UINT_LEAST8_TYPE
 715 #define UINT_LEAST8_TYPE ((const char *) NULL)
 716 #endif
 717
 718 #ifndef UINT_LEAST16_TYPE
 719 #define UINT_LEAST16_TYPE ((const char *) NULL)
 720 #endif
 721
 722 #ifndef UINT_LEAST32_TYPE
 723 #define UINT_LEAST32_TYPE ((const char *) NULL)
 724 #endif
 725
 726 #ifndef UINT_LEAST64_TYPE
 727 #define UINT_LEAST64_TYPE ((const char *) NULL)
 728 #endif
 729
 730 #ifndef INT_FAST8_TYPE
 731 #define INT_FAST8_TYPE ((const char *) NULL)
 732 #endif
 733
 734 #ifndef INT_FAST16_TYPE
 735 #define INT_FAST16_TYPE ((const char *) NULL)
 736 #endif
 737
 738 #ifndef INT_FAST32_TYPE
 739 #define INT_FAST32_TYPE ((const char *) NULL)
 740 #endif
 741
 742 #ifndef INT_FAST64_TYPE
 743 #define INT_FAST64_TYPE ((const char *) NULL)
 744 #endif
 745
 746 #ifndef UINT_FAST8_TYPE
 747 #define UINT_FAST8_TYPE ((const char *) NULL)
 748 #endif
 749
 750 #ifndef UINT_FAST16_TYPE
 751 #define UINT_FAST16_TYPE ((const char *) NULL)
 752 #endif
 753
 754 #ifndef UINT_FAST32_TYPE
 755 #define UINT_FAST32_TYPE ((const char *) NULL)
 756 #endif
 757
 758 #ifndef UINT_FAST64_TYPE
 759 #define UINT_FAST64_TYPE ((const char *) NULL)
 760 #endif
 761
 762 #ifndef INTPTR_TYPE
 763 #define INTPTR_TYPE ((const char *) NULL)
 764 #endif
 765
 766 #ifndef UINTPTR_TYPE
 767 #define UINTPTR_TYPE ((const char *) NULL)
 768 #endif
 769
 770 /* Width in bits of a pointer.  Mind the value of the macro `Pmode'.  */
 771 #ifndef POINTER_SIZE
 772 #define POINTER_SIZE BITS_PER_WORD
 773 #endif
 774 #ifndef POINTER_SIZE_UNITS
 775 #define POINTER_SIZE_UNITS ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)
 776 #endif
 777
 778
 779 #ifndef PIC_OFFSET_TABLE_REGNUM
 780 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
 781 #endif
 782
 783 #ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
 784 #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 0
 785 #endif
 786
 787 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
 788 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
 789 #endif
 790
 791 #ifndef TARGET_DECLSPEC
 792 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
 793 /* If the target supports the "dllimport" attribute, users are
 794    probably used to the "__declspec" syntax.  */
 795 #define TARGET_DECLSPEC 1
 796 #else
 797 #define TARGET_DECLSPEC 0
 798 #endif
 799 #endif
 800
 801 /* By default, the preprocessor should be invoked the same way in C++
 802    as in C.  */
 803 #ifndef CPLUSPLUS_CPP_SPEC
 804 #ifdef CPP_SPEC
 805 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
 806 #endif
 807 #endif
 808
 809 #ifndef ACCUMULATE_OUTGOING_ARGS
 810 #define ACCUMULATE_OUTGOING_ARGS 0
 811 #endif
 812
 813 /* By default, use the GNU runtime for Objective C.  */
 814 #ifndef NEXT_OBJC_RUNTIME
 815 #define NEXT_OBJC_RUNTIME 0
 816 #endif
 817
 818 /* Supply a default definition for PUSH_ARGS.  */
 819 #ifndef PUSH_ARGS
 820 #ifdef PUSH_ROUNDING
 821 #define PUSH_ARGS       !ACCUMULATE_OUTGOING_ARGS
 822 #else
 823 #define PUSH_ARGS       0
 824 #endif
 825 #endif
 826
 827 /* Decide whether a function's arguments should be processed
 828    from first to last or from last to first.
 829
 830    They should if the stack and args grow in opposite directions, but
 831    only if we have push insns.  */
 832
 833 #ifdef PUSH_ROUNDING
 834
 835 #ifndef PUSH_ARGS_REVERSED
 836 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
 837 #define PUSH_ARGS_REVERSED  PUSH_ARGS
 838 #endif
 839 #endif
 840
 841 #endif
 842
 843 #ifndef PUSH_ARGS_REVERSED
 844 #define PUSH_ARGS_REVERSED 0
 845 #endif
 846
 847 /* Default value for the alignment (in bits) a C conformant malloc has to
 848    provide. This default is intended to be safe and always correct.  */
 849 #ifndef MALLOC_ABI_ALIGNMENT
 850 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
 851 #endif
 852
 853 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
 854    STACK_BOUNDARY is required.  */
 855 #ifndef PREFERRED_STACK_BOUNDARY
 856 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
 857 #endif
 858
 859 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not
 860    defined.  */
 861 #ifndef INCOMING_STACK_BOUNDARY
 862 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY
 863 #endif
 864
 865 #ifndef TARGET_DEFAULT_PACK_STRUCT
 866 #define TARGET_DEFAULT_PACK_STRUCT 0
 867 #endif
 868
 869 /* By default, the vtable entries are void pointers, the so the alignment
 870    is the same as pointer alignment.  The value of this macro specifies
 871    the alignment of the vtable entry in bits.  It should be defined only
 872    when special alignment is necessary.  */
 873 #ifndef TARGET_VTABLE_ENTRY_ALIGN
 874 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
 875 #endif
 876
 877 /* There are a few non-descriptor entries in the vtable at offsets below
 878    zero.  If these entries must be padded (say, to preserve the alignment
 879    specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
 880    words in each data entry.  */
 881 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
 882 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
 883 #endif
 884
 885 /* Decide whether it is safe to use a local alias for a virtual function
 886    when constructing thunks.  */
 887 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
 888 #ifdef ASM_OUTPUT_DEF
 889 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
 890 #else
 891 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
 892 #endif
 893 #endif
 894
 895 /* Select a format to encode pointers in exception handling data.  We
 896    prefer those that result in fewer dynamic relocations.  Assume no
 897    special support here and encode direct references.  */
 898 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
 899 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  DW_EH_PE_absptr
 900 #endif
 901
 902 /* By default, the C++ compiler will use the lowest bit of the pointer
 903    to function to indicate a pointer-to-member-function points to a
 904    virtual member function.  However, if FUNCTION_BOUNDARY indicates
 905    function addresses aren't always even, the lowest bit of the delta
 906    field will be used.  */
 907 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
 908 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
 909   (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
 910    ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
 911 #endif
 912
 913 #ifndef DEFAULT_GDB_EXTENSIONS
 914 #define DEFAULT_GDB_EXTENSIONS 1
 915 #endif
 916
 917 /* If more than one debugging type is supported, you must define
 918    PREFERRED_DEBUGGING_TYPE to choose the default.  */
 919
 920 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
 921          + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
 922          + defined (VMS_DEBUGGING_INFO))
 923 #ifndef PREFERRED_DEBUGGING_TYPE
 924 #error You must define PREFERRED_DEBUGGING_TYPE
 925 #endif /* no PREFERRED_DEBUGGING_TYPE */
 926
 927 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
 928    here so other code needn't care.  */
 929 #elif defined DBX_DEBUGGING_INFO
 930 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 931
 932 #elif defined SDB_DEBUGGING_INFO
 933 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
 934
 935 #elif defined DWARF2_DEBUGGING_INFO
 936 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 937
 938 #elif defined VMS_DEBUGGING_INFO
 939 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
 940
 941 #elif defined XCOFF_DEBUGGING_INFO
 942 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
 943
 944 #else
 945 /* No debugging format is supported by this target.  */
 946 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
 947 #endif
 948
 949 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
 950 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
 951 #endif
 952
 953 /* True if the targets integer-comparison functions return { 0, 1, 2
 954    } to indicate { <, ==, > }.  False if { -1, 0, 1 } is used
 955    instead.  The libgcc routines are biased.  */
 956 #ifndef TARGET_LIB_INT_CMP_BIASED
 957 #define TARGET_LIB_INT_CMP_BIASED (true)
 958 #endif
 959
 960 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
 961    then the word-endianness is the same as for integers.  */
 962 #ifndef FLOAT_WORDS_BIG_ENDIAN
 963 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 964 #endif
 965
 966 #ifndef REG_WORDS_BIG_ENDIAN
 967 #define REG_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 968 #endif
 969
 970 #ifdef TARGET_FLT_EVAL_METHOD
 971 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 1
 972 #else
 973 #define TARGET_FLT_EVAL_METHOD 0
 974 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 0
 975 #endif
 976
 977 #ifndef TARGET_DEC_EVAL_METHOD
 978 #define TARGET_DEC_EVAL_METHOD 2
 979 #endif
 980
 981 #ifndef HAS_LONG_COND_BRANCH
 982 #define HAS_LONG_COND_BRANCH 0
 983 #endif
 984
 985 #ifndef HAS_LONG_UNCOND_BRANCH
 986 #define HAS_LONG_UNCOND_BRANCH 0
 987 #endif
 988
 989 /* Determine whether __cxa_atexit, rather than atexit, is used to
 990    register C++ destructors for local statics and global objects.  */
 991 #ifndef DEFAULT_USE_CXA_ATEXIT
 992 #define DEFAULT_USE_CXA_ATEXIT 0
 993 #endif
 994
 995 #if GCC_VERSION >= 3000 && defined IN_GCC
 996 /* These old constraint macros shouldn't appear anywhere in a
 997    configuration using MD constraint definitions.  */
 998 #endif
 999
1000 /* Determin whether the target runtime library is Bionic */
1001 #ifndef TARGET_HAS_BIONIC
1002 #define TARGET_HAS_BIONIC 0
1003 #endif
1004
1005 /* Indicate that CLZ and CTZ are undefined at zero.  */
1006 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
1007 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
1008 #endif
1009 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
1010 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
1011 #endif
1012
1013 /* Provide a default value for STORE_FLAG_VALUE.  */
1014 #ifndef STORE_FLAG_VALUE
1015 #define STORE_FLAG_VALUE  1
1016 #endif
1017
1018 /* This macro is used to determine what the largest unit size that
1019    move_by_pieces can use is.  */
1020
1021 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
1022    move efficiently, as opposed to  MOVE_MAX which is the maximum
1023    number of bytes we can move with a single instruction.  */
1024
1025 #ifndef MOVE_MAX_PIECES
1026 #define MOVE_MAX_PIECES   MOVE_MAX
1027 #endif
1028
1029 /* STORE_MAX_PIECES is the number of bytes at a time that we can
1030    store efficiently.  Due to internal GCC limitations, this is
1031    MOVE_MAX_PIECES limited by the number of bytes GCC can represent
1032    for an immediate constant.  */
1033
1034 #ifndef STORE_MAX_PIECES
1035 #define STORE_MAX_PIECES  MIN (MOVE_MAX_PIECES, 2 * sizeof (HOST_WIDE_INT))
1036 #endif
1037
1038 #ifndef MAX_MOVE_MAX
1039 #define MAX_MOVE_MAX MOVE_MAX
1040 #endif
1041
1042 #ifndef MIN_UNITS_PER_WORD
1043 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
1044 #endif
1045
1046 #ifndef MAX_BITS_PER_WORD
1047 #define MAX_BITS_PER_WORD BITS_PER_WORD
1048 #endif
1049
1050 #ifndef STACK_POINTER_OFFSET
1051 #define STACK_POINTER_OFFSET    0
1052 #endif
1053
1054 #ifndef LOCAL_REGNO
1055 #define LOCAL_REGNO(REGNO)  0
1056 #endif
1057
1058 #ifndef HONOR_REG_ALLOC_ORDER
1059 #define HONOR_REG_ALLOC_ORDER 0
1060 #endif
1061
1062 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1063    the stack pointer does not matter.  The value is tested only in
1064    functions that have frame pointers.  */
1065 #ifndef EXIT_IGNORE_STACK
1066 #define EXIT_IGNORE_STACK 0
1067 #endif
1068
1069 /* Assume that case vectors are not pc-relative.  */
1070 #ifndef CASE_VECTOR_PC_RELATIVE
1071 #define CASE_VECTOR_PC_RELATIVE 0
1072 #endif
1073
1074 /* Assume that trampolines need function alignment.  */
1075 #ifndef TRAMPOLINE_ALIGNMENT
1076 #define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY
1077 #endif
1078
1079 /* Register mappings for target machines without register windows.  */
1080 #ifndef INCOMING_REGNO
1081 #define INCOMING_REGNO(N) (N)
1082 #endif
1083
1084 #ifndef OUTGOING_REGNO
1085 #define OUTGOING_REGNO(N) (N)
1086 #endif
1087
1088 #ifndef SHIFT_COUNT_TRUNCATED
1089 #define SHIFT_COUNT_TRUNCATED 0
1090 #endif
1091
1092 #ifndef LEGITIMATE_PIC_OPERAND_P
1093 #define LEGITIMATE_PIC_OPERAND_P(X) 1
1094 #endif
1095
1096 #ifndef TARGET_MEM_CONSTRAINT
1097 #define TARGET_MEM_CONSTRAINT 'm'
1098 #endif
1099
1100 #ifndef REVERSIBLE_CC_MODE
1101 #define REVERSIBLE_CC_MODE(MODE) 0
1102 #endif
1103
1104 /* Biggest alignment supported by the object file format of this machine.  */
1105 #ifndef MAX_OFILE_ALIGNMENT
1106 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
1107 #endif
1108
1109 #ifndef FRAME_GROWS_DOWNWARD
1110 #define FRAME_GROWS_DOWNWARD 0
1111 #endif
1112
1113 #ifndef RETURN_ADDR_IN_PREVIOUS_FRAME
1114 #define RETURN_ADDR_IN_PREVIOUS_FRAME 0
1115 #endif
1116
1117 /* On most machines, the CFA coincides with the first incoming parm.  */
1118 #ifndef ARG_POINTER_CFA_OFFSET
1119 #define ARG_POINTER_CFA_OFFSET(FNDECL) \
1120   (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
1121 #endif
1122
1123 /* On most machines, we use the CFA as DW_AT_frame_base.  */
1124 #ifndef CFA_FRAME_BASE_OFFSET
1125 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0
1126 #endif
1127
1128 /* The offset from the incoming value of %sp to the top of the stack frame
1129    for the current function.  */
1130 #ifndef INCOMING_FRAME_SP_OFFSET
1131 #define INCOMING_FRAME_SP_OFFSET 0
1132 #endif
1133
1134 #ifndef HARD_REGNO_NREGS_HAS_PADDING
1135 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
1136 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
1137 #endif
1138
1139 #ifndef OUTGOING_REG_PARM_STACK_SPACE
1140 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
1141 #endif
1142
1143 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
1144    the backend.  MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
1145    effort stack alignment supported by the backend.  If the backend
1146    supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
1147    MAX_STACK_ALIGNMENT are the same.  Otherwise, the incoming stack
1148    boundary will limit the maximum guaranteed stack alignment.  */
1149 #ifdef MAX_STACK_ALIGNMENT
1150 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
1151 #else
1152 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY
1153 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
1154 #endif
1155
1156 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
1157
1158 #ifndef LOCAL_ALIGNMENT
1159 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
1160 #endif
1161
1162 #ifndef STACK_SLOT_ALIGNMENT
1163 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
1164   ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
1165 #endif
1166
1167 #ifndef LOCAL_DECL_ALIGNMENT
1168 #define LOCAL_DECL_ALIGNMENT(DECL) \
1169   LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
1170 #endif
1171
1172 #ifndef MINIMUM_ALIGNMENT
1173 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN)
1174 #endif
1175
1176 /* Alignment value for attribute ((aligned)).  */
1177 #ifndef ATTRIBUTE_ALIGNED_VALUE
1178 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
1179 #endif
1180
1181 #ifndef SLOW_UNALIGNED_ACCESS
1182 #define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) STRICT_ALIGNMENT
1183 #endif
1184
1185 /* For most ports anything that evaluates to a constant symbolic
1186    or integer value is acceptable as a constant address.  */
1187 #ifndef CONSTANT_ADDRESS_P
1188 #define CONSTANT_ADDRESS_P(X)   (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE)
1189 #endif
1190
1191 #ifndef MAX_FIXED_MODE_SIZE
1192 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
1193 #endif
1194
1195 /* Nonzero if structures and unions should be returned in memory.
1196
1197    This should only be defined if compatibility with another compiler or
1198    with an ABI is needed, because it results in slower code.  */
1199
1200 #ifndef DEFAULT_PCC_STRUCT_RETURN
1201 #define DEFAULT_PCC_STRUCT_RETURN 1
1202 #endif
1203
1204 #ifndef PCC_BITFIELD_TYPE_MATTERS
1205 #define PCC_BITFIELD_TYPE_MATTERS false
1206 #endif
1207
1208 #ifndef INSN_SETS_ARE_DELAYED
1209 #define INSN_SETS_ARE_DELAYED(INSN) false
1210 #endif
1211
1212 #ifndef INSN_REFERENCES_ARE_DELAYED
1213 #define INSN_REFERENCES_ARE_DELAYED(INSN) false
1214 #endif
1215
1216 #ifndef NO_FUNCTION_CSE
1217 #define NO_FUNCTION_CSE false
1218 #endif
1219
1220 #ifndef HARD_REGNO_RENAME_OK
1221 #define HARD_REGNO_RENAME_OK(FROM, TO) true
1222 #endif
1223
1224 #ifndef EPILOGUE_USES
1225 #define EPILOGUE_USES(REG) false
1226 #endif
1227
1228 #ifndef ARGS_GROW_DOWNWARD
1229 #define ARGS_GROW_DOWNWARD 0
1230 #endif
1231
1232 #ifndef STACK_GROWS_DOWNWARD
1233 #define STACK_GROWS_DOWNWARD 0
1234 #endif
1235
1236 #ifndef STACK_PUSH_CODE
1237 #if STACK_GROWS_DOWNWARD
1238 #define STACK_PUSH_CODE PRE_DEC
1239 #else
1240 #define STACK_PUSH_CODE PRE_INC
1241 #endif
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 /* If the target supports integers that are wider than two
1410    HOST_WIDE_INTs on the host compiler, then the target should define
1411    TARGET_SUPPORTS_WIDE_INT and make the appropriate fixups.
1412    Otherwise the compiler really is not robust.  */
1413 #ifndef TARGET_SUPPORTS_WIDE_INT
1414 #define TARGET_SUPPORTS_WIDE_INT 0
1415 #endif
1416
1417 #ifndef HAVE_simple_return
1418 #define HAVE_simple_return 0
1419 static inline rtx
1420 gen_simple_return ()
1421 {
1422   gcc_unreachable ();
1423   return NULL;
1424 }
1425 #endif
1426
1427 #ifndef HAVE_return
1428 #define HAVE_return 0
1429 static inline rtx
1430 gen_return ()
1431 {
1432   gcc_unreachable ();
1433   return NULL;
1434 }
1435 #endif
1436
1437 #ifndef HAVE_epilogue
1438 #define HAVE_epilogue 0
1439 static inline rtx
1440 gen_epilogue ()
1441 {
1442   gcc_unreachable ();
1443   return NULL;
1444 }
1445 #endif
1446
1447 #endif /* GCC_INSN_FLAGS_H  */
1448
1449 #endif  /* ! GCC_DEFAULTS_H */