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
   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 #ifndef GET_ENVIRONMENT
  32 #define GET_ENVIRONMENT(VALUE, NAME) do { (VALUE) = getenv (NAME); } while (0)
  33 #endif
  34
  35 /* This defines which switch letters take arguments.  */
  36
  37 #define DEFAULT_SWITCH_TAKES_ARG(CHAR) \
  38   ((CHAR) == 'D' || (CHAR) == 'U' || (CHAR) == 'o' \
  39    || (CHAR) == 'e' || (CHAR) == 'T' || (CHAR) == 'u' \
  40    || (CHAR) == 'I' || (CHAR) == 'J' || (CHAR) == 'm' \
  41    || (CHAR) == 'x' || (CHAR) == 'L' || (CHAR) == 'A' \
  42    || (CHAR) == 'B' )
  43
  44 /* This defines which multi-letter switches take arguments.  */
  45
  46 #define DEFAULT_WORD_SWITCH_TAKES_ARG(STR)              \
  47  (!strcmp (STR, "Tdata") || !strcmp (STR, "Ttext")      \
  48   || !strcmp (STR, "Tbss") || !strcmp (STR, "include")  \
  49   || !strcmp (STR, "imacros") || !strcmp (STR, "aux-info") \
  50   || !strcmp (STR, "idirafter") || !strcmp (STR, "iprefix") \
  51   || !strcmp (STR, "iwithprefix") || !strcmp (STR, "iwithprefixbefore") \
  52   || !strcmp (STR, "iquote") || !strcmp (STR, "isystem") \
  53   || !strcmp (STR, "isysroot") || !strcmp (STR, "imultilib") \
  54   || !strcmp (STR, "-param") || !strcmp (STR, "specs") \
  55   || !strcmp (STR, "MF") || !strcmp (STR, "MT") || !strcmp (STR, "MQ") \
  56   || !strcmp (STR, "fintrinsic-modules-path") \
  57   || !strcmp (STR, "dumpbase") || !strcmp (STR, "dumpdir"))
  58
  59 #ifndef SWITCH_TAKES_ARG
  60 #define SWITCH_TAKES_ARG(CHAR) DEFAULT_SWITCH_TAKES_ARG (CHAR)
  61 #endif
  62
  63 #ifndef WORD_SWITCH_TAKES_ARG
  64 #define WORD_SWITCH_TAKES_ARG(STR) DEFAULT_WORD_SWITCH_TAKES_ARG (STR)
  65 #endif
  66
  67 /* Store in OUTPUT a string (made with alloca) containing an
  68    assembler-name for a local static variable or function named NAME.
  69    LABELNO is an integer which is different for each call.  */
  70
  71 #ifndef ASM_PN_FORMAT
  72 # ifndef NO_DOT_IN_LABEL
  73 #  define ASM_PN_FORMAT "%s.%lu"
  74 # else
  75 #  ifndef NO_DOLLAR_IN_LABEL
  76 #   define ASM_PN_FORMAT "%s$%lu"
  77 #  else
  78 #   define ASM_PN_FORMAT "__%s_%lu"
  79 #  endif
  80 # endif
  81 #endif /* ! ASM_PN_FORMAT */
  82
  83 #ifndef ASM_FORMAT_PRIVATE_NAME
  84 # define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
  85   do { const char *const name_ = (NAME); \
  86        char *const output_ = (OUTPUT) = \
  87          (char *) alloca (strlen (name_) + 32); \
  88        sprintf (output_, ASM_PN_FORMAT, name_, (unsigned long)(LABELNO)); \
  89   } while (0)
  90 #endif
  91
  92 /* Choose a reasonable default for ASM_OUTPUT_ASCII.  */
  93
  94 #ifndef ASM_OUTPUT_ASCII
  95 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
  96   do {                                                                        \
  97     FILE *_hide_asm_out_file = (MYFILE);                                      \
  98     const unsigned char *_hide_p = (const unsigned char *) (MYSTRING);        \
  99     int _hide_thissize = (MYLENGTH);                                          \
 100     {                                                                         \
 101       FILE *asm_out_file = _hide_asm_out_file;                                \
 102       const unsigned char *p = _hide_p;                                       \
 103       int thissize = _hide_thissize;                                          \
 104       int i;                                                                  \
 105       fprintf (asm_out_file, "\t.ascii \"");                                  \
 106                                                                               \
 107       for (i = 0; i < thissize; i++)                                          \
 108         {                                                                     \
 109           int c = p[i];                                                       \
 110           if (c == '\"' || c == '\\')                                         \
 111             putc ('\\', asm_out_file);                                        \
 112           if (ISPRINT(c))                                                     \
 113             putc (c, asm_out_file);                                           \
 114           else                                                                \
 115             {                                                                 \
 116               fprintf (asm_out_file, "\\%o", c);                              \
 117               /* After an octal-escape, if a digit follows,                   \
 118                  terminate one string constant and start another.             \
 119                  The VAX assembler fails to stop reading the escape           \
 120                  after three digits, so this is the only way we               \
 121                  can get it to parse the data properly.  */                   \
 122               if (i < thissize - 1 && ISDIGIT(p[i + 1]))                      \
 123                 fprintf (asm_out_file, "\"\n\t.ascii \"");                    \
 124           }                                                                   \
 125         }                                                                     \
 126       fprintf (asm_out_file, "\"\n");                                         \
 127     }                                                                         \
 128   }                                                                           \
 129   while (0)
 130 #endif
 131
 132 /* This is how we tell the assembler to equate two values.  */
 133 #ifdef SET_ASM_OP
 134 #ifndef ASM_OUTPUT_DEF
 135 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
 136  do {   fprintf ((FILE), "%s", SET_ASM_OP);                             \
 137         assemble_name (FILE, LABEL1);                                   \
 138         fprintf (FILE, ",");                                            \
 139         assemble_name (FILE, LABEL2);                                   \
 140         fprintf (FILE, "\n");                                           \
 141   } while (0)
 142 #endif
 143 #endif
 144
 145 #ifndef TLS_COMMON_ASM_OP
 146 #define TLS_COMMON_ASM_OP ".tls_common"
 147 #endif
 148
 149 #if defined (HAVE_AS_TLS) && !defined (ASM_OUTPUT_TLS_COMMON)
 150 #define ASM_OUTPUT_TLS_COMMON(FILE, DECL, NAME, SIZE)                   \
 151   do                                                                    \
 152     {                                                                   \
 153       fprintf ((FILE), "\t%s\t", TLS_COMMON_ASM_OP);                    \
 154       assemble_name ((FILE), (NAME));                                   \
 155       fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n",          \
 156                (SIZE), DECL_ALIGN (DECL) / BITS_PER_UNIT);              \
 157     }                                                                   \
 158   while (0)
 159 #endif
 160
 161 /* Decide whether to defer emitting the assembler output for an equate
 162    of two values.  The default is to not defer output.  */
 163 #ifndef TARGET_DEFERRED_OUTPUT_DEFS
 164 #define TARGET_DEFERRED_OUTPUT_DEFS(DECL,TARGET) false
 165 #endif
 166
 167 /* This is how to output the definition of a user-level label named
 168    NAME, such as the label on variable NAME.  */
 169
 170 #ifndef ASM_OUTPUT_LABEL
 171 #define ASM_OUTPUT_LABEL(FILE,NAME) \
 172   do { assemble_name ((FILE), (NAME)); fputs (":\n", (FILE)); } while (0)
 173 #endif
 174
 175 /* This is how to output the definition of a user-level label named
 176    NAME, such as the label on a function.  */
 177
 178 #ifndef ASM_OUTPUT_FUNCTION_LABEL
 179 #define ASM_OUTPUT_FUNCTION_LABEL(FILE, NAME, DECL) \
 180   ASM_OUTPUT_LABEL ((FILE), (NAME))
 181 #endif
 182
 183 /* Output the definition of a compiler-generated label named NAME.  */
 184 #ifndef ASM_OUTPUT_INTERNAL_LABEL
 185 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,NAME)    \
 186   do {                                          \
 187     assemble_name_raw ((FILE), (NAME));         \
 188     fputs (":\n", (FILE));                      \
 189   } while (0)
 190 #endif
 191
 192 /* This is how to output a reference to a user-level label named NAME.  */
 193
 194 #ifndef ASM_OUTPUT_LABELREF
 195 #define ASM_OUTPUT_LABELREF(FILE,NAME)  asm_fprintf ((FILE), "%U%s", (NAME))
 196 #endif
 197
 198 /* Allow target to print debug info labels specially.  This is useful for
 199    VLIW targets, since debug info labels should go into the middle of
 200    instruction bundles instead of breaking them.  */
 201
 202 #ifndef ASM_OUTPUT_DEBUG_LABEL
 203 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
 204   (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM)
 205 #endif
 206
 207 /* This is how we tell the assembler that a symbol is weak.  */
 208 #ifndef ASM_OUTPUT_WEAK_ALIAS
 209 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
 210 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE)      \
 211   do                                                    \
 212     {                                                   \
 213       ASM_WEAKEN_LABEL (STREAM, NAME);                  \
 214       if (VALUE)                                        \
 215         ASM_OUTPUT_DEF (STREAM, NAME, VALUE);           \
 216     }                                                   \
 217   while (0)
 218 #endif
 219 #endif
 220
 221 /* This is how we tell the assembler that a symbol is a weak alias to
 222    another symbol that doesn't require the other symbol to be defined.
 223    Uses of the former will turn into weak uses of the latter, i.e.,
 224    uses that, in case the latter is undefined, will not cause errors,
 225    and will add it to the symbol table as weak undefined.  However, if
 226    the latter is referenced directly, a strong reference prevails.  */
 227 #ifndef ASM_OUTPUT_WEAKREF
 228 #if defined HAVE_GAS_WEAKREF
 229 #define ASM_OUTPUT_WEAKREF(FILE, DECL, NAME, VALUE)                     \
 230   do                                                                    \
 231     {                                                                   \
 232       fprintf ((FILE), "\t.weakref\t");                                 \
 233       assemble_name ((FILE), (NAME));                                   \
 234       fprintf ((FILE), ",");                                            \
 235       assemble_name ((FILE), (VALUE));                                  \
 236       fprintf ((FILE), "\n");                                           \
 237     }                                                                   \
 238   while (0)
 239 #endif
 240 #endif
 241
 242 /* How to emit a .type directive.  */
 243 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE
 244 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT
 245 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE)   \
 246   do                                                    \
 247     {                                                   \
 248       fputs (TYPE_ASM_OP, STREAM);                      \
 249       assemble_name (STREAM, NAME);                     \
 250       fputs (", ", STREAM);                             \
 251       fprintf (STREAM, TYPE_OPERAND_FMT, TYPE);         \
 252       putc ('\n', STREAM);                              \
 253     }                                                   \
 254   while (0)
 255 #endif
 256 #endif
 257
 258 /* How to emit a .size directive.  */
 259 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE
 260 #ifdef SIZE_ASM_OP
 261 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE)   \
 262   do                                                    \
 263     {                                                   \
 264       HOST_WIDE_INT size_ = (SIZE);                     \
 265       fputs (SIZE_ASM_OP, STREAM);                      \
 266       assemble_name (STREAM, NAME);                     \
 267       fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \
 268     }                                                   \
 269   while (0)
 270
 271 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME)          \
 272   do                                                    \
 273     {                                                   \
 274       fputs (SIZE_ASM_OP, STREAM);                      \
 275       assemble_name (STREAM, NAME);                     \
 276       fputs (", .-", STREAM);                           \
 277       assemble_name (STREAM, NAME);                     \
 278       putc ('\n', STREAM);                              \
 279     }                                                   \
 280   while (0)
 281
 282 #endif
 283 #endif
 284
 285 /* This determines whether or not we support weak symbols.  */
 286 #ifndef SUPPORTS_WEAK
 287 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
 288 #define SUPPORTS_WEAK 1
 289 #else
 290 #define SUPPORTS_WEAK 0
 291 #endif
 292 #endif
 293
 294 /* This determines whether or not we support the discriminator
 295    attribute in the .loc directive.  */
 296 #ifndef SUPPORTS_DISCRIMINATOR
 297 #ifdef HAVE_GAS_DISCRIMINATOR
 298 #define SUPPORTS_DISCRIMINATOR 1
 299 #else
 300 #define SUPPORTS_DISCRIMINATOR 0
 301 #endif
 302 #endif
 303
 304 /* This determines whether or not we support link-once semantics.  */
 305 #ifndef SUPPORTS_ONE_ONLY
 306 #ifdef MAKE_DECL_ONE_ONLY
 307 #define SUPPORTS_ONE_ONLY 1
 308 #else
 309 #define SUPPORTS_ONE_ONLY 0
 310 #endif
 311 #endif
 312
 313 /* This determines whether weak symbols must be left out of a static
 314    archive's table of contents.  Defining this macro to be nonzero has
 315    the consequence that certain symbols will not be made weak that
 316    otherwise would be.  The C++ ABI requires this macro to be zero;
 317    see the documentation.  */
 318 #ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
 319 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
 320 #endif
 321
 322 /* This determines whether or not we need linkonce unwind information.  */
 323 #ifndef TARGET_USES_WEAK_UNWIND_INFO
 324 #define TARGET_USES_WEAK_UNWIND_INFO 0
 325 #endif
 326
 327 /* By default, there is no prefix on user-defined symbols.  */
 328 #ifndef USER_LABEL_PREFIX
 329 #define USER_LABEL_PREFIX ""
 330 #endif
 331
 332 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
 333    provide a weak attribute.  Else define it to nothing.
 334
 335    This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
 336    not available at that time.
 337
 338    Note, this is only for use by target files which we know are to be
 339    compiled by GCC.  */
 340 #ifndef TARGET_ATTRIBUTE_WEAK
 341 # if SUPPORTS_WEAK
 342 #  define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
 343 # else
 344 #  define TARGET_ATTRIBUTE_WEAK
 345 # endif
 346 #endif
 347
 348 /* Determines whether we may use common symbols to represent one-only
 349    semantics (a.k.a. "vague linkage").  */
 350 #ifndef USE_COMMON_FOR_ONE_ONLY
 351 # define USE_COMMON_FOR_ONE_ONLY 1
 352 #endif
 353
 354 /* By default we can assume that all global symbols are in one namespace,
 355    across all shared libraries.  */
 356 #ifndef MULTIPLE_SYMBOL_SPACES
 357 # define MULTIPLE_SYMBOL_SPACES 0
 358 #endif
 359
 360 /* If the target supports init_priority C++ attribute, give
 361    SUPPORTS_INIT_PRIORITY a nonzero value.  */
 362 #ifndef SUPPORTS_INIT_PRIORITY
 363 #define SUPPORTS_INIT_PRIORITY 1
 364 #endif /* SUPPORTS_INIT_PRIORITY */
 365
 366 /* If duplicate library search directories can be removed from a
 367    linker command without changing the linker's semantics, give this
 368    symbol a nonzero.  */
 369 #ifndef LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
 370 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 0
 371 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
 372
 373 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
 374    the rest of the DWARF 2 frame unwind support is also provided.  */
 375 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX) \
 376     && !defined (TARGET_UNWIND_INFO)
 377 #define DWARF2_UNWIND_INFO 1
 378 #endif
 379
 380 /* If we have named sections, and we're using crtstuff to run ctors,
 381    use them for registering eh frame information.  */
 382 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
 383     && !defined(EH_FRAME_IN_DATA_SECTION)
 384 #ifndef EH_FRAME_SECTION_NAME
 385 #define EH_FRAME_SECTION_NAME ".eh_frame"
 386 #endif
 387 #endif
 388
 389 /* On many systems, different EH table encodings are used under
 390    difference circumstances.  Some will require runtime relocations;
 391    some will not.  For those that do not require runtime relocations,
 392    we would like to make the table read-only.  However, since the
 393    read-only tables may need to be combined with read-write tables
 394    that do require runtime relocation, it is not safe to make the
 395    tables read-only unless the linker will merge read-only and
 396    read-write sections into a single read-write section.  If your
 397    linker does not have this ability, but your system is such that no
 398    encoding used with non-PIC code will ever require a runtime
 399    relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in
 400    your target configuration file.  */
 401 #ifndef EH_TABLES_CAN_BE_READ_ONLY
 402 #ifdef HAVE_LD_RO_RW_SECTION_MIXING
 403 #define EH_TABLES_CAN_BE_READ_ONLY 1
 404 #else
 405 #define EH_TABLES_CAN_BE_READ_ONLY 0
 406 #endif
 407 #endif
 408
 409 /* If we have named section and we support weak symbols, then use the
 410    .jcr section for recording java classes which need to be registered
 411    at program start-up time.  */
 412 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
 413 #ifndef JCR_SECTION_NAME
 414 #define JCR_SECTION_NAME ".jcr"
 415 #endif
 416 #endif
 417
 418 /* This decision to use a .jcr section can be overridden by defining
 419    USE_JCR_SECTION to 0 in target file.  This is necessary if target
 420    can define JCR_SECTION_NAME but does not have crtstuff or
 421    linker support for .jcr section.  */
 422 #ifndef TARGET_USE_JCR_SECTION
 423 #ifdef JCR_SECTION_NAME
 424 #define TARGET_USE_JCR_SECTION 1
 425 #else
 426 #define TARGET_USE_JCR_SECTION 0
 427 #endif
 428 #endif
 429
 430 /* Number of hardware registers that go into the DWARF-2 unwind info.
 431    If not defined, equals FIRST_PSEUDO_REGISTER  */
 432
 433 #ifndef DWARF_FRAME_REGISTERS
 434 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
 435 #endif
 436
 437 /* How to renumber registers for dbx and gdb.  If not defined, assume
 438    no renumbering is necessary.  */
 439
 440 #ifndef DBX_REGISTER_NUMBER
 441 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 442 #endif
 443
 444 /* Default sizes for base C types.  If the sizes are different for
 445    your target, you should override these values by defining the
 446    appropriate symbols in your tm.h file.  */
 447
 448 #ifndef BITS_PER_UNIT
 449 #define BITS_PER_UNIT 8
 450 #endif
 451
 452 #ifndef BITS_PER_WORD
 453 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
 454 #endif
 455
 456 #ifndef CHAR_TYPE_SIZE
 457 #define CHAR_TYPE_SIZE BITS_PER_UNIT
 458 #endif
 459
 460 #ifndef BOOL_TYPE_SIZE
 461 /* `bool' has size and alignment `1', on almost all platforms.  */
 462 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
 463 #endif
 464
 465 #ifndef SHORT_TYPE_SIZE
 466 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
 467 #endif
 468
 469 #ifndef INT_TYPE_SIZE
 470 #define INT_TYPE_SIZE BITS_PER_WORD
 471 #endif
 472
 473 #ifndef LONG_TYPE_SIZE
 474 #define LONG_TYPE_SIZE BITS_PER_WORD
 475 #endif
 476
 477 #ifndef LONG_LONG_TYPE_SIZE
 478 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
 479 #endif
 480
 481 #ifndef WCHAR_TYPE_SIZE
 482 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
 483 #endif
 484
 485 #ifndef FLOAT_TYPE_SIZE
 486 #define FLOAT_TYPE_SIZE BITS_PER_WORD
 487 #endif
 488
 489 #ifndef DOUBLE_TYPE_SIZE
 490 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 491 #endif
 492
 493 #ifndef LONG_DOUBLE_TYPE_SIZE
 494 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 495 #endif
 496
 497 #ifndef DECIMAL32_TYPE_SIZE
 498 #define DECIMAL32_TYPE_SIZE 32
 499 #endif
 500
 501 #ifndef DECIMAL64_TYPE_SIZE
 502 #define DECIMAL64_TYPE_SIZE 64
 503 #endif
 504
 505 #ifndef DECIMAL128_TYPE_SIZE
 506 #define DECIMAL128_TYPE_SIZE 128
 507 #endif
 508
 509 #ifndef SHORT_FRACT_TYPE_SIZE
 510 #define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT
 511 #endif
 512
 513 #ifndef FRACT_TYPE_SIZE
 514 #define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2)
 515 #endif
 516
 517 #ifndef LONG_FRACT_TYPE_SIZE
 518 #define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4)
 519 #endif
 520
 521 #ifndef LONG_LONG_FRACT_TYPE_SIZE
 522 #define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8)
 523 #endif
 524
 525 #ifndef SHORT_ACCUM_TYPE_SIZE
 526 #define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2)
 527 #endif
 528
 529 #ifndef ACCUM_TYPE_SIZE
 530 #define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2)
 531 #endif
 532
 533 #ifndef LONG_ACCUM_TYPE_SIZE
 534 #define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2)
 535 #endif
 536
 537 #ifndef LONG_LONG_ACCUM_TYPE_SIZE
 538 #define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2)
 539 #endif
 540
 541 /* We let tm.h override the types used here, to handle trivial differences
 542    such as the choice of unsigned int or long unsigned int for size_t.
 543    When machines start needing nontrivial differences in the size type,
 544    it would be best to do something here to figure out automatically
 545    from other information what type to use.  */
 546
 547 #ifndef SIZE_TYPE
 548 #define SIZE_TYPE "long unsigned int"
 549 #endif
 550
 551 #ifndef PID_TYPE
 552 #define PID_TYPE "int"
 553 #endif
 554
 555 /* If GCC knows the exact uint_least16_t and uint_least32_t types from
 556    <stdint.h>, use them for char16_t and char32_t.  Otherwise, use
 557    these guesses; getting the wrong type of a given width will not
 558    affect C++ name mangling because in C++ these are distinct types
 559    not typedefs.  */
 560
 561 #ifdef UINT_LEAST16_TYPE
 562 #define CHAR16_TYPE UINT_LEAST16_TYPE
 563 #else
 564 #define CHAR16_TYPE "short unsigned int"
 565 #endif
 566
 567 #ifdef UINT_LEAST32_TYPE
 568 #define CHAR32_TYPE UINT_LEAST32_TYPE
 569 #else
 570 #define CHAR32_TYPE "unsigned int"
 571 #endif
 572
 573 #ifndef WCHAR_TYPE
 574 #define WCHAR_TYPE "int"
 575 #endif
 576
 577 /* WCHAR_TYPE gets overridden by -fshort-wchar.  */
 578 #define MODIFIED_WCHAR_TYPE \
 579         (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE)
 580
 581 #ifndef PTRDIFF_TYPE
 582 #define PTRDIFF_TYPE "long int"
 583 #endif
 584
 585 #ifndef WINT_TYPE
 586 #define WINT_TYPE "unsigned int"
 587 #endif
 588
 589 #ifndef INTMAX_TYPE
 590 #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)     \
 591                      ? "int"                                    \
 592                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 593                         ? "long int"                            \
 594                         : "long long int"))
 595 #endif
 596
 597 #ifndef UINTMAX_TYPE
 598 #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE)    \
 599                      ? "unsigned int"                           \
 600                      : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
 601                         ? "long unsigned int"                   \
 602                         : "long long unsigned int"))
 603 #endif
 604
 605
 606 /* There are no default definitions of these <stdint.h> types.  */
 607
 608 #ifndef SIG_ATOMIC_TYPE
 609 #define SIG_ATOMIC_TYPE ((const char *) NULL)
 610 #endif
 611
 612 #ifndef INT8_TYPE
 613 #define INT8_TYPE ((const char *) NULL)
 614 #endif
 615
 616 #ifndef INT16_TYPE
 617 #define INT16_TYPE ((const char *) NULL)
 618 #endif
 619
 620 #ifndef INT32_TYPE
 621 #define INT32_TYPE ((const char *) NULL)
 622 #endif
 623
 624 #ifndef INT64_TYPE
 625 #define INT64_TYPE ((const char *) NULL)
 626 #endif
 627
 628 #ifndef UINT8_TYPE
 629 #define UINT8_TYPE ((const char *) NULL)
 630 #endif
 631
 632 #ifndef UINT16_TYPE
 633 #define UINT16_TYPE ((const char *) NULL)
 634 #endif
 635
 636 #ifndef UINT32_TYPE
 637 #define UINT32_TYPE ((const char *) NULL)
 638 #endif
 639
 640 #ifndef UINT64_TYPE
 641 #define UINT64_TYPE ((const char *) NULL)
 642 #endif
 643
 644 #ifndef INT_LEAST8_TYPE
 645 #define INT_LEAST8_TYPE ((const char *) NULL)
 646 #endif
 647
 648 #ifndef INT_LEAST16_TYPE
 649 #define INT_LEAST16_TYPE ((const char *) NULL)
 650 #endif
 651
 652 #ifndef INT_LEAST32_TYPE
 653 #define INT_LEAST32_TYPE ((const char *) NULL)
 654 #endif
 655
 656 #ifndef INT_LEAST64_TYPE
 657 #define INT_LEAST64_TYPE ((const char *) NULL)
 658 #endif
 659
 660 #ifndef UINT_LEAST8_TYPE
 661 #define UINT_LEAST8_TYPE ((const char *) NULL)
 662 #endif
 663
 664 #ifndef UINT_LEAST16_TYPE
 665 #define UINT_LEAST16_TYPE ((const char *) NULL)
 666 #endif
 667
 668 #ifndef UINT_LEAST32_TYPE
 669 #define UINT_LEAST32_TYPE ((const char *) NULL)
 670 #endif
 671
 672 #ifndef UINT_LEAST64_TYPE
 673 #define UINT_LEAST64_TYPE ((const char *) NULL)
 674 #endif
 675
 676 #ifndef INT_FAST8_TYPE
 677 #define INT_FAST8_TYPE ((const char *) NULL)
 678 #endif
 679
 680 #ifndef INT_FAST16_TYPE
 681 #define INT_FAST16_TYPE ((const char *) NULL)
 682 #endif
 683
 684 #ifndef INT_FAST32_TYPE
 685 #define INT_FAST32_TYPE ((const char *) NULL)
 686 #endif
 687
 688 #ifndef INT_FAST64_TYPE
 689 #define INT_FAST64_TYPE ((const char *) NULL)
 690 #endif
 691
 692 #ifndef UINT_FAST8_TYPE
 693 #define UINT_FAST8_TYPE ((const char *) NULL)
 694 #endif
 695
 696 #ifndef UINT_FAST16_TYPE
 697 #define UINT_FAST16_TYPE ((const char *) NULL)
 698 #endif
 699
 700 #ifndef UINT_FAST32_TYPE
 701 #define UINT_FAST32_TYPE ((const char *) NULL)
 702 #endif
 703
 704 #ifndef UINT_FAST64_TYPE
 705 #define UINT_FAST64_TYPE ((const char *) NULL)
 706 #endif
 707
 708 #ifndef INTPTR_TYPE
 709 #define INTPTR_TYPE ((const char *) NULL)
 710 #endif
 711
 712 #ifndef UINTPTR_TYPE
 713 #define UINTPTR_TYPE ((const char *) NULL)
 714 #endif
 715
 716 /* Width in bits of a pointer.  Mind the value of the macro `Pmode'.  */
 717 #ifndef POINTER_SIZE
 718 #define POINTER_SIZE BITS_PER_WORD
 719 #endif
 720
 721 #ifndef PIC_OFFSET_TABLE_REGNUM
 722 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
 723 #endif
 724
 725 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
 726 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
 727 #endif
 728
 729 #ifndef TARGET_DECLSPEC
 730 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
 731 /* If the target supports the "dllimport" attribute, users are
 732    probably used to the "__declspec" syntax.  */
 733 #define TARGET_DECLSPEC 1
 734 #else
 735 #define TARGET_DECLSPEC 0
 736 #endif
 737 #endif
 738
 739 /* By default, the preprocessor should be invoked the same way in C++
 740    as in C.  */
 741 #ifndef CPLUSPLUS_CPP_SPEC
 742 #ifdef CPP_SPEC
 743 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
 744 #endif
 745 #endif
 746
 747 #ifndef ACCUMULATE_OUTGOING_ARGS
 748 #define ACCUMULATE_OUTGOING_ARGS 0
 749 #endif
 750
 751 /* Supply a default definition for PUSH_ARGS.  */
 752 #ifndef PUSH_ARGS
 753 #ifdef PUSH_ROUNDING
 754 #define PUSH_ARGS       !ACCUMULATE_OUTGOING_ARGS
 755 #else
 756 #define PUSH_ARGS       0
 757 #endif
 758 #endif
 759
 760 /* Decide whether a function's arguments should be processed
 761    from first to last or from last to first.
 762
 763    They should if the stack and args grow in opposite directions, but
 764    only if we have push insns.  */
 765
 766 #ifdef PUSH_ROUNDING
 767
 768 #ifndef PUSH_ARGS_REVERSED
 769 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
 770 #define PUSH_ARGS_REVERSED  PUSH_ARGS
 771 #endif
 772 #endif
 773
 774 #endif
 775
 776 #ifndef PUSH_ARGS_REVERSED
 777 #define PUSH_ARGS_REVERSED 0
 778 #endif
 779
 780 /* Default value for the alignment (in bits) a C conformant malloc has to
 781    provide. This default is intended to be safe and always correct.  */
 782 #ifndef MALLOC_ABI_ALIGNMENT
 783 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
 784 #endif
 785
 786 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
 787    STACK_BOUNDARY is required.  */
 788 #ifndef PREFERRED_STACK_BOUNDARY
 789 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
 790 #endif
 791
 792 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not
 793    defined.  */
 794 #ifndef INCOMING_STACK_BOUNDARY
 795 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY
 796 #endif
 797
 798 #ifndef TARGET_DEFAULT_PACK_STRUCT
 799 #define TARGET_DEFAULT_PACK_STRUCT 0
 800 #endif
 801
 802 /* By default, the C++ compiler will use function addresses in the
 803    vtable entries.  Setting this nonzero tells the compiler to use
 804    function descriptors instead.  The value of this macro says how
 805    many words wide the descriptor is (normally 2).  It is assumed
 806    that the address of a function descriptor may be treated as a
 807    pointer to a function.  */
 808 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
 809 #define TARGET_VTABLE_USES_DESCRIPTORS 0
 810 #endif
 811
 812 /* By default, the vtable entries are void pointers, the so the alignment
 813    is the same as pointer alignment.  The value of this macro specifies
 814    the alignment of the vtable entry in bits.  It should be defined only
 815    when special alignment is necessary.  */
 816 #ifndef TARGET_VTABLE_ENTRY_ALIGN
 817 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
 818 #endif
 819
 820 /* There are a few non-descriptor entries in the vtable at offsets below
 821    zero.  If these entries must be padded (say, to preserve the alignment
 822    specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
 823    words in each data entry.  */
 824 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
 825 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
 826 #endif
 827
 828 /* Decide whether it is safe to use a local alias for a virtual function
 829    when constructing thunks.  */
 830 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
 831 #ifdef ASM_OUTPUT_DEF
 832 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
 833 #else
 834 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
 835 #endif
 836 #endif
 837
 838 /* Select a format to encode pointers in exception handling data.  We
 839    prefer those that result in fewer dynamic relocations.  Assume no
 840    special support here and encode direct references.  */
 841 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
 842 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  DW_EH_PE_absptr
 843 #endif
 844
 845 /* By default, the C++ compiler will use the lowest bit of the pointer
 846    to function to indicate a pointer-to-member-function points to a
 847    virtual member function.  However, if FUNCTION_BOUNDARY indicates
 848    function addresses aren't always even, the lowest bit of the delta
 849    field will be used.  */
 850 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
 851 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
 852   (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
 853    ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
 854 #endif
 855
 856 #ifndef DEFAULT_GDB_EXTENSIONS
 857 #define DEFAULT_GDB_EXTENSIONS 1
 858 #endif
 859
 860 /* If more than one debugging type is supported, you must define
 861    PREFERRED_DEBUGGING_TYPE to choose the default.  */
 862
 863 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
 864          + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
 865          + defined (VMS_DEBUGGING_INFO))
 866 #ifndef PREFERRED_DEBUGGING_TYPE
 867 #error You must define PREFERRED_DEBUGGING_TYPE
 868 #endif /* no PREFERRED_DEBUGGING_TYPE */
 869
 870 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
 871    here so other code needn't care.  */
 872 #elif defined DBX_DEBUGGING_INFO
 873 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 874
 875 #elif defined SDB_DEBUGGING_INFO
 876 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
 877
 878 #elif defined DWARF2_DEBUGGING_INFO
 879 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 880
 881 #elif defined VMS_DEBUGGING_INFO
 882 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
 883
 884 #elif defined XCOFF_DEBUGGING_INFO
 885 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
 886
 887 #else
 888 /* No debugging format is supported by this target.  */
 889 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
 890 #endif
 891
 892 #ifndef LARGEST_EXPONENT_IS_NORMAL
 893 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
 894 #endif
 895
 896 #ifndef ROUND_TOWARDS_ZERO
 897 #define ROUND_TOWARDS_ZERO 0
 898 #endif
 899
 900 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
 901 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
 902 #endif
 903
 904 /* True if the targets integer-comparison functions return { 0, 1, 2
 905    } to indicate { <, ==, > }.  False if { -1, 0, 1 } is used
 906    instead.  The libgcc routines are biased.  */
 907 #ifndef TARGET_LIB_INT_CMP_BIASED
 908 #define TARGET_LIB_INT_CMP_BIASED (true)
 909 #endif
 910
 911 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
 912    then the word-endianness is the same as for integers.  */
 913 #ifndef FLOAT_WORDS_BIG_ENDIAN
 914 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
 915 #endif
 916
 917 #ifdef TARGET_FLT_EVAL_METHOD
 918 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 1
 919 #else
 920 #define TARGET_FLT_EVAL_METHOD 0
 921 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 0
 922 #endif
 923
 924 #ifndef TARGET_DEC_EVAL_METHOD
 925 #define TARGET_DEC_EVAL_METHOD 2
 926 #endif
 927
 928 #ifndef HOT_TEXT_SECTION_NAME
 929 #define HOT_TEXT_SECTION_NAME ".text.hot"
 930 #endif
 931
 932 #ifndef UNLIKELY_EXECUTED_TEXT_SECTION_NAME
 933 #define UNLIKELY_EXECUTED_TEXT_SECTION_NAME ".text.unlikely"
 934 #endif
 935
 936 #ifndef HAS_LONG_COND_BRANCH
 937 #define HAS_LONG_COND_BRANCH 0
 938 #endif
 939
 940 #ifndef HAS_LONG_UNCOND_BRANCH
 941 #define HAS_LONG_UNCOND_BRANCH 0
 942 #endif
 943
 944 /* By default, only attempt to parallelize bitwise operations, and
 945    possibly adds/subtracts using bit-twiddling.  */
 946 #ifndef UNITS_PER_SIMD_WORD
 947 #define UNITS_PER_SIMD_WORD(MODE) UNITS_PER_WORD
 948 #endif
 949
 950 /* Determine whether __cxa_atexit, rather than atexit, is used to
 951    register C++ destructors for local statics and global objects.  */
 952 #ifndef DEFAULT_USE_CXA_ATEXIT
 953 #define DEFAULT_USE_CXA_ATEXIT 0
 954 #endif
 955
 956 /* If none of these macros are defined, the port must use the new
 957    technique of defining constraints in the machine description.
 958    tm_p.h will define those macros that machine-independent code
 959    still uses.  */
 960 #if  !defined CONSTRAINT_LEN                    \
 961   && !defined REG_CLASS_FROM_LETTER             \
 962   && !defined REG_CLASS_FROM_CONSTRAINT         \
 963   && !defined CONST_OK_FOR_LETTER_P             \
 964   && !defined CONST_OK_FOR_CONSTRAINT_P         \
 965   && !defined CONST_DOUBLE_OK_FOR_LETTER_P      \
 966   && !defined CONST_DOUBLE_OK_FOR_CONSTRAINT_P  \
 967   && !defined EXTRA_CONSTRAINT                  \
 968   && !defined EXTRA_CONSTRAINT_STR              \
 969   && !defined EXTRA_MEMORY_CONSTRAINT           \
 970   && !defined EXTRA_ADDRESS_CONSTRAINT
 971
 972 #define USE_MD_CONSTRAINTS
 973
 974 #if GCC_VERSION >= 3000 && defined IN_GCC
 975 /* These old constraint macros shouldn't appear anywhere in a
 976    configuration using MD constraint definitions.  */
 977 #pragma GCC poison REG_CLASS_FROM_LETTER CONST_OK_FOR_LETTER_P \
 978                    CONST_DOUBLE_OK_FOR_LETTER_P EXTRA_CONSTRAINT
 979 #endif
 980
 981 #else /* old constraint mechanism in use */
 982
 983 /* Determine whether extra constraint letter should be handled
 984    via address reload (like 'o').  */
 985 #ifndef EXTRA_MEMORY_CONSTRAINT
 986 #define EXTRA_MEMORY_CONSTRAINT(C,STR) 0
 987 #endif
 988
 989 /* Determine whether extra constraint letter should be handled
 990    as an address (like 'p').  */
 991 #ifndef EXTRA_ADDRESS_CONSTRAINT
 992 #define EXTRA_ADDRESS_CONSTRAINT(C,STR) 0
 993 #endif
 994
 995 /* When a port defines CONSTRAINT_LEN, it should use DEFAULT_CONSTRAINT_LEN
 996    for all the characters that it does not want to change, so things like the
 997   'length' of a digit in a matching constraint is an implementation detail,
 998    and not part of the interface.  */
 999 #define DEFAULT_CONSTRAINT_LEN(C,STR) 1
1000
1001 #ifndef CONSTRAINT_LEN
1002 #define CONSTRAINT_LEN(C,STR) DEFAULT_CONSTRAINT_LEN (C, STR)
1003 #endif
1004
1005 #if defined (CONST_OK_FOR_LETTER_P) && ! defined (CONST_OK_FOR_CONSTRAINT_P)
1006 #define CONST_OK_FOR_CONSTRAINT_P(VAL,C,STR) CONST_OK_FOR_LETTER_P (VAL, C)
1007 #endif
1008
1009 #if defined (CONST_DOUBLE_OK_FOR_LETTER_P) && ! defined (CONST_DOUBLE_OK_FOR_CONSTRAINT_P)
1010 #define CONST_DOUBLE_OK_FOR_CONSTRAINT_P(OP,C,STR) \
1011   CONST_DOUBLE_OK_FOR_LETTER_P (OP, C)
1012 #endif
1013
1014 #ifndef REG_CLASS_FROM_CONSTRAINT
1015 #define REG_CLASS_FROM_CONSTRAINT(C,STR) REG_CLASS_FROM_LETTER (C)
1016 #endif
1017
1018 #if defined (EXTRA_CONSTRAINT) && ! defined (EXTRA_CONSTRAINT_STR)
1019 #define EXTRA_CONSTRAINT_STR(OP, C,STR) EXTRA_CONSTRAINT (OP, C)
1020 #endif
1021
1022 #endif /* old constraint mechanism in use */
1023
1024 /* Determine whether the entire c99 runtime
1025    is present in the runtime library.  */
1026 #ifndef TARGET_C99_FUNCTIONS
1027 #define TARGET_C99_FUNCTIONS 0
1028 #endif
1029
1030 /* Determine whether the target runtime library has
1031    a sincos implementation following the GNU extension.  */
1032 #ifndef TARGET_HAS_SINCOS
1033 #define TARGET_HAS_SINCOS 0
1034 #endif
1035
1036 /* Indicate that CLZ and CTZ are undefined at zero.  */
1037 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
1038 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
1039 #endif
1040 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
1041 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
1042 #endif
1043
1044 /* Provide a default value for STORE_FLAG_VALUE.  */
1045 #ifndef STORE_FLAG_VALUE
1046 #define STORE_FLAG_VALUE  1
1047 #endif
1048
1049 /* This macro is used to determine what the largest unit size that
1050    move_by_pieces can use is.  */
1051
1052 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
1053    move efficiently, as opposed to  MOVE_MAX which is the maximum
1054    number of bytes we can move with a single instruction.  */
1055
1056 #ifndef MOVE_MAX_PIECES
1057 #define MOVE_MAX_PIECES   MOVE_MAX
1058 #endif
1059
1060 #ifndef MAX_MOVE_MAX
1061 #define MAX_MOVE_MAX MOVE_MAX
1062 #endif
1063
1064 #ifndef MIN_UNITS_PER_WORD
1065 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
1066 #endif
1067
1068 #ifndef MAX_BITS_PER_WORD
1069 #define MAX_BITS_PER_WORD BITS_PER_WORD
1070 #endif
1071
1072 #ifndef STACK_POINTER_OFFSET
1073 #define STACK_POINTER_OFFSET    0
1074 #endif
1075
1076 #ifndef LOCAL_REGNO
1077 #define LOCAL_REGNO(REGNO)  0
1078 #endif
1079
1080 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1081    the stack pointer does not matter.  The value is tested only in
1082    functions that have frame pointers.  */
1083 #ifndef EXIT_IGNORE_STACK
1084 #define EXIT_IGNORE_STACK 0
1085 #endif
1086
1087 /* Assume that case vectors are not pc-relative.  */
1088 #ifndef CASE_VECTOR_PC_RELATIVE
1089 #define CASE_VECTOR_PC_RELATIVE 0
1090 #endif
1091
1092 /* Assume that trampolines need function alignment.  */
1093 #ifndef TRAMPOLINE_ALIGNMENT
1094 #define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY
1095 #endif
1096
1097 /* Register mappings for target machines without register windows.  */
1098 #ifndef INCOMING_REGNO
1099 #define INCOMING_REGNO(N) (N)
1100 #endif
1101
1102 #ifndef OUTGOING_REGNO
1103 #define OUTGOING_REGNO(N) (N)
1104 #endif
1105
1106 #ifndef SHIFT_COUNT_TRUNCATED
1107 #define SHIFT_COUNT_TRUNCATED 0
1108 #endif
1109
1110 #ifndef LEGITIMATE_PIC_OPERAND_P
1111 #define LEGITIMATE_PIC_OPERAND_P(X) 1
1112 #endif
1113
1114 #ifndef TARGET_MEM_CONSTRAINT
1115 #define TARGET_MEM_CONSTRAINT 'm'
1116 #endif
1117
1118 #ifndef REVERSIBLE_CC_MODE
1119 #define REVERSIBLE_CC_MODE(MODE) 0
1120 #endif
1121
1122 /* Biggest alignment supported by the object file format of this machine.  */
1123 #ifndef MAX_OFILE_ALIGNMENT
1124 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
1125 #endif
1126
1127 #ifndef FRAME_GROWS_DOWNWARD
1128 #define FRAME_GROWS_DOWNWARD 0
1129 #endif
1130
1131 /* On most machines, the CFA coincides with the first incoming parm.  */
1132 #ifndef ARG_POINTER_CFA_OFFSET
1133 #define ARG_POINTER_CFA_OFFSET(FNDECL) \
1134   (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
1135 #endif
1136
1137 /* On most machines, we use the CFA as DW_AT_frame_base.  */
1138 #ifndef CFA_FRAME_BASE_OFFSET
1139 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0
1140 #endif
1141
1142 /* The offset from the incoming value of %sp to the top of the stack frame
1143    for the current function.  */
1144 #ifndef INCOMING_FRAME_SP_OFFSET
1145 #define INCOMING_FRAME_SP_OFFSET 0
1146 #endif
1147
1148 #ifndef HARD_REGNO_NREGS_HAS_PADDING
1149 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
1150 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
1151 #endif
1152
1153 #ifndef OUTGOING_REG_PARM_STACK_SPACE
1154 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
1155 #endif
1156
1157 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
1158    the backend.  MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
1159    effort stack alignment supported by the backend.  If the backend
1160    supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
1161    MAX_STACK_ALIGNMENT are the same.  Otherwise, the incoming stack
1162    boundary will limit the maximum guaranteed stack alignment.  */
1163 #ifdef MAX_STACK_ALIGNMENT
1164 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
1165 #else
1166 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY
1167 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
1168 #endif
1169
1170 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
1171
1172 #ifndef LOCAL_ALIGNMENT
1173 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
1174 #endif
1175
1176 #ifndef STACK_SLOT_ALIGNMENT
1177 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
1178   ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
1179 #endif
1180
1181 #ifndef LOCAL_DECL_ALIGNMENT
1182 #define LOCAL_DECL_ALIGNMENT(DECL) \
1183   LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
1184 #endif
1185
1186 #ifndef MINIMUM_ALIGNMENT
1187 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN)
1188 #endif
1189
1190 /* Alignment value for attribute ((aligned)).  */
1191 #ifndef ATTRIBUTE_ALIGNED_VALUE
1192 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
1193 #endif
1194
1195 /* Many ports have no mode-dependent addresses (except possibly autoincrement
1196    and autodecrement addresses, which are handled by target-independent code
1197    in recog.c).  */
1198 #ifndef GO_IF_MODE_DEPENDENT_ADDRESS
1199 #define GO_IF_MODE_DEPENDENT_ADDRESS(X, WIN)
1200 #endif
1201
1202 /* For most ports anything that evaluates to a constant symbolic
1203    or integer value is acceptable as a constant address.  */
1204 #ifndef CONSTANT_ADDRESS_P
1205 #define CONSTANT_ADDRESS_P(X)   (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE)
1206 #endif
1207
1208 #ifndef MAX_FIXED_MODE_SIZE
1209 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
1210 #endif
1211
1212 /* Nonzero if structures and unions should be returned in memory.
1213
1214    This should only be defined if compatibility with another compiler or
1215    with an ABI is needed, because it results in slower code.  */
1216
1217 #ifndef DEFAULT_PCC_STRUCT_RETURN
1218 #define DEFAULT_PCC_STRUCT_RETURN 1
1219 #endif
1220
1221 #ifdef GCC_INSN_FLAGS_H
1222 /* Dependent default target macro definitions
1223
1224    This section of defaults.h defines target macros that depend on generated
1225    headers.  This is a bit awkward:  We want to put all default definitions
1226    for target macros in defaults.h, but some of the defaults depend on the
1227    HAVE_* flags defines of insn-flags.h.  But insn-flags.h is not always
1228    included by files that do include defaults.h.
1229
1230    Fortunately, the default macro definitions that depend on the HAVE_*
1231    macros are also the ones that will only be used inside GCC itself, i.e.
1232    not in the gen* programs or in target objects like libgcc.
1233
1234    Obviously, it would be best to keep this section of defaults.h as small
1235    as possible, by converting the macros defined below to target hooks or
1236    functions.
1237 */
1238
1239 /* Just because the user configured --with-sjlj-exceptions=no doesn't
1240    mean that we can use call frame exceptions.  Detect that the target
1241    has appropriate support.  */
1242
1243 #ifndef MUST_USE_SJLJ_EXCEPTIONS
1244 # if defined (EH_RETURN_DATA_REGNO)                     \
1245        && (defined (TARGET_UNWIND_INFO)                 \
1246            || (DWARF2_UNWIND_INFO                       \
1247                && (defined (EH_RETURN_HANDLER_RTX)      \
1248                    || defined (HAVE_eh_return))))
1249 #  define MUST_USE_SJLJ_EXCEPTIONS      0
1250 # else
1251 #  define MUST_USE_SJLJ_EXCEPTIONS      1
1252 # endif
1253 #endif
1254
1255 #ifdef CONFIG_SJLJ_EXCEPTIONS
1256 # if CONFIG_SJLJ_EXCEPTIONS == 1
1257 #  define USING_SJLJ_EXCEPTIONS         1
1258 # endif
1259 # if CONFIG_SJLJ_EXCEPTIONS == 0
1260 #  define USING_SJLJ_EXCEPTIONS         0
1261 #  if !defined(EH_RETURN_DATA_REGNO)
1262     #error "EH_RETURN_DATA_REGNO required"
1263 #  endif
1264 #  if ! (defined(TARGET_UNWIND_INFO) || DWARF2_UNWIND_INFO)
1265     #error "{DWARF2,TARGET}_UNWIND_INFO required"
1266 #  endif
1267 #  if !defined(TARGET_UNWIND_INFO) \
1268         && !(defined(EH_RETURN_HANDLER_RTX) || defined(HAVE_eh_return))
1269     #error "EH_RETURN_HANDLER_RTX or eh_return required"
1270 #  endif
1271 /* Usually the above error checks will have already triggered an
1272    error, but backends may set MUST_USE_SJLJ_EXCEPTIONS for their own
1273    reasons.  */
1274 #  if MUST_USE_SJLJ_EXCEPTIONS
1275     #error "Must use SJLJ exceptions but configured not to"
1276 #  endif
1277 # endif
1278 #else
1279 # define USING_SJLJ_EXCEPTIONS          MUST_USE_SJLJ_EXCEPTIONS
1280 #endif
1281
1282 /* The default branch cost is 1.  */
1283 #ifndef BRANCH_COST
1284 #define BRANCH_COST(speed_p, predictable_p) 1
1285 #endif
1286
1287 /* If a memory-to-memory move would take MOVE_RATIO or more simple
1288    move-instruction sequences, we will do a movmem or libcall instead.  */
1289
1290 #ifndef MOVE_RATIO
1291 #if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti)
1292 #define MOVE_RATIO(speed) 2
1293 #else
1294 /* If we are optimizing for space (-Os), cut down the default move ratio.  */
1295 #define MOVE_RATIO(speed) ((speed) ? 15 : 3)
1296 #endif
1297 #endif
1298
1299 /* If a clear memory operation would take CLEAR_RATIO or more simple
1300    move-instruction sequences, we will do a setmem or libcall instead.  */
1301
1302 #ifndef CLEAR_RATIO
1303 #if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
1304 #define CLEAR_RATIO(speed) 2
1305 #else
1306 /* If we are optimizing for space, cut down the default clear ratio.  */
1307 #define CLEAR_RATIO(speed) ((speed) ? 15 :3)
1308 #endif
1309 #endif
1310
1311 /* If a memory set (to value other than zero) operation would take
1312    SET_RATIO or more simple move-instruction sequences, we will do a movmem
1313    or libcall instead.  */
1314 #ifndef SET_RATIO
1315 #define SET_RATIO(speed) MOVE_RATIO(speed)
1316 #endif
1317
1318 /* Supply a default definition for FUNCTION_ARG_PADDING:
1319    usually pad upward, but pad short args downward on
1320    big-endian machines.  */
1321
1322 #define DEFAULT_FUNCTION_ARG_PADDING(MODE, TYPE)                        \
1323   (! BYTES_BIG_ENDIAN                                                   \
1324    ? upward                                                             \
1325    : (((MODE) == BLKmode                                                \
1326        ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST         \
1327           && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \
1328        : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY)                       \
1329       ? downward : upward))
1330
1331 #ifndef FUNCTION_ARG_PADDING
1332 #define FUNCTION_ARG_PADDING(MODE, TYPE)        \
1333   DEFAULT_FUNCTION_ARG_PADDING ((MODE), (TYPE))
1334 #endif
1335
1336 /* Supply a default definition for FUNCTION_ARG_BOUNDARY.  Normally, we let
1337    FUNCTION_ARG_PADDING, which also pads the length, handle any needed
1338    alignment.  */
1339
1340 #ifndef FUNCTION_ARG_BOUNDARY
1341 #define FUNCTION_ARG_BOUNDARY(MODE, TYPE)       PARM_BOUNDARY
1342 #endif
1343
1344 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
1345    Normally move_insn, so Pmode stack pointer.  */
1346
1347 #ifndef STACK_SAVEAREA_MODE
1348 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
1349 #endif
1350
1351 /* Supply a default definition of STACK_SIZE_MODE for
1352    allocate_dynamic_stack_space.  Normally PLUS/MINUS, so word_mode.  */
1353
1354 #ifndef STACK_SIZE_MODE
1355 #define STACK_SIZE_MODE word_mode
1356 #endif
1357
1358 /* Provide default values for the macros controlling stack checking.  */
1359
1360 /* The default is neither full builtin stack checking...  */
1361 #ifndef STACK_CHECK_BUILTIN
1362 #define STACK_CHECK_BUILTIN 0
1363 #endif
1364
1365 /* ...nor static builtin stack checking.  */
1366 #ifndef STACK_CHECK_STATIC_BUILTIN
1367 #define STACK_CHECK_STATIC_BUILTIN 0
1368 #endif
1369
1370 /* The default interval is one page (4096 bytes).  */
1371 #ifndef STACK_CHECK_PROBE_INTERVAL_EXP
1372 #define STACK_CHECK_PROBE_INTERVAL_EXP 12
1373 #endif
1374
1375 /* The default is not to move the stack pointer.  */
1376 #ifndef STACK_CHECK_MOVING_SP
1377 #define STACK_CHECK_MOVING_SP 0
1378 #endif
1379
1380 /* This is a kludge to try to capture the discrepancy between the old
1381    mechanism (generic stack checking) and the new mechanism (static
1382    builtin stack checking).  STACK_CHECK_PROTECT needs to be bumped
1383    for the latter because part of the protection area is effectively
1384    included in STACK_CHECK_MAX_FRAME_SIZE for the former.  */
1385 #ifdef STACK_CHECK_PROTECT
1386 #define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
1387 #else
1388 #define STACK_OLD_CHECK_PROTECT \
1389  (USING_SJLJ_EXCEPTIONS ? 75 * UNITS_PER_WORD : 8 * 1024)
1390 #endif
1391
1392 /* Minimum amount of stack required to recover from an anticipated stack
1393    overflow detection.  The default value conveys an estimate of the amount
1394    of stack required to propagate an exception.  */
1395 #ifndef STACK_CHECK_PROTECT
1396 #define STACK_CHECK_PROTECT \
1397  (USING_SJLJ_EXCEPTIONS ? 75 * UNITS_PER_WORD : 12 * 1024)
1398 #endif
1399
1400 /* Make the maximum frame size be the largest we can and still only need
1401    one probe per function.  */
1402 #ifndef STACK_CHECK_MAX_FRAME_SIZE
1403 #define STACK_CHECK_MAX_FRAME_SIZE \
1404   ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD)
1405 #endif
1406
1407 /* This is arbitrary, but should be large enough everywhere.  */
1408 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
1409 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
1410 #endif
1411
1412 /* Provide a reasonable default for the maximum size of an object to
1413    allocate in the fixed frame.  We may need to be able to make this
1414    controllable by the user at some point.  */
1415 #ifndef STACK_CHECK_MAX_VAR_SIZE
1416 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
1417 #endif
1418
1419 #ifndef SWITCHABLE_TARGET
1420 #define SWITCHABLE_TARGET 0
1421 #endif
1422
1423 #endif /* GCC_INSN_FLAGS_H  */
1424
1425 #endif  /* ! GCC_DEFAULTS_H */