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 4 Free Software Foundation, Inc. 5 Contributed by Ron Guilmette (rfg (at) 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 #define obstack_chunk_alloc ((void *(*) (long)) xmalloc) 36 #define obstack_chunk_free ((void (*) (void *)) free) 37 #define OBSTACK_CHUNK_SIZE 0 38 #define gcc_obstack_init(OBSTACK) \ 39 _obstack_begin ((OBSTACK), OBSTACK_CHUNK_SIZE, 0, \ 40 obstack_chunk_alloc, \ 41 obstack_chunk_free) 42 43 /* Store in OUTPUT a string (made with alloca) containing an 44 assembler-name for a local static variable or function named NAME. 45 LABELNO is an integer which is different for each call. */ 46 47 #ifndef ASM_PN_FORMAT 48 # ifndef NO_DOT_IN_LABEL 49 # define ASM_PN_FORMAT "%s.%lu" 50 # else 51 # ifndef NO_DOLLAR_IN_LABEL 52 # define ASM_PN_FORMAT "%s$%lu" 53 # else 54 # define ASM_PN_FORMAT "__%s_%lu" 55 # endif 56 # endif 57 #endif /* ! ASM_PN_FORMAT */ 58 59 #ifndef ASM_FORMAT_PRIVATE_NAME 60 # define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \ 61 do { const char *const name_ = (NAME); \ 62 char *const output_ = (OUTPUT) = \ 63 (char *) alloca (strlen (name_) + 32); \ 64 sprintf (output_, ASM_PN_FORMAT, name_, (unsigned long)(LABELNO)); \ 65 } while (0) 66 #endif 67 68 /* Choose a reasonable default for ASM_OUTPUT_ASCII. */ 69 70 #ifndef ASM_OUTPUT_ASCII 71 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \ 72 do { \ 73 FILE *_hide_asm_out_file = (MYFILE); \ 74 const unsigned char *_hide_p = (const unsigned char *) (MYSTRING); \ 75 int _hide_thissize = (MYLENGTH); \ 76 { \ 77 FILE *asm_out_file = _hide_asm_out_file; \ 78 const unsigned char *p = _hide_p; \ 79 int thissize = _hide_thissize; \ 80 int i; \ 81 fprintf (asm_out_file, "\t.ascii \""); \ 82 \ 83 for (i = 0; i < thissize; i++) \ 84 { \ 85 int c = p[i]; \ 86 if (c == '\"' || c == '\\') \ 87 putc ('\\', asm_out_file); \ 88 if (ISPRINT(c)) \ 89 putc (c, asm_out_file); \ 90 else \ 91 { \ 92 fprintf (asm_out_file, "\\%o", c); \ 93 /* After an octal-escape, if a digit follows, \ 94 terminate one string constant and start another. \ 95 The VAX assembler fails to stop reading the escape \ 96 after three digits, so this is the only way we \ 97 can get it to parse the data properly. */ \ 98 if (i < thissize - 1 && ISDIGIT(p[i + 1])) \ 99 fprintf (asm_out_file, "\"\n\t.ascii \""); \ 100 } \ 101 } \ 102 fprintf (asm_out_file, "\"\n"); \ 103 } \ 104 } \ 105 while (0) 106 #endif 107 108 /* This is how we tell the assembler to equate two values. */ 109 #ifdef SET_ASM_OP 110 #ifndef ASM_OUTPUT_DEF 111 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \ 112 do { fprintf ((FILE), "%s", SET_ASM_OP); \ 113 assemble_name (FILE, LABEL1); \ 114 fprintf (FILE, ","); \ 115 assemble_name (FILE, LABEL2); \ 116 fprintf (FILE, "\n"); \ 117 } while (0) 118 #endif 119 #endif 120 121 #if defined (HAVE_AS_TLS) && !defined (ASM_OUTPUT_TLS_COMMON) 122 #define ASM_OUTPUT_TLS_COMMON(FILE, DECL, NAME, SIZE) \ 123 do \ 124 { \ 125 fprintf ((FILE), "\t.tls_common\t"); \ 126 assemble_name ((FILE), (NAME)); \ 127 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", \ 128 (SIZE), DECL_ALIGN (DECL) / BITS_PER_UNIT); \ 129 } \ 130 while (0) 131 #endif 132 133 /* Decide whether to defer emitting the assembler output for an equate 134 of two values. The default is to not defer output. */ 135 #ifndef TARGET_DEFERRED_OUTPUT_DEFS 136 #define TARGET_DEFERRED_OUTPUT_DEFS(DECL,TARGET) false 137 #endif 138 139 /* This is how to output the definition of a user-level label named 140 NAME, such as the label on a static function or variable NAME. */ 141 142 #ifndef ASM_OUTPUT_LABEL 143 #define ASM_OUTPUT_LABEL(FILE,NAME) \ 144 do { assemble_name ((FILE), (NAME)); fputs (":\n", (FILE)); } while (0) 145 #endif 146 147 /* Output the definition of a compiler-generated label named NAME. */ 148 #ifndef ASM_OUTPUT_INTERNAL_LABEL 149 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,NAME) \ 150 do { \ 151 assemble_name_raw ((FILE), (NAME)); \ 152 fputs (":\n", (FILE)); \ 153 } while (0) 154 #endif 155 156 /* This is how to output a reference to a user-level label named NAME. */ 157 158 #ifndef ASM_OUTPUT_LABELREF 159 #define ASM_OUTPUT_LABELREF(FILE,NAME) asm_fprintf ((FILE), "%U%s", (NAME)) 160 #endif 161 162 /* Allow target to print debug info labels specially. This is useful for 163 VLIW targets, since debug info labels should go into the middle of 164 instruction bundles instead of breaking them. */ 165 166 #ifndef ASM_OUTPUT_DEBUG_LABEL 167 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \ 168 (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM) 169 #endif 170 171 /* This is how we tell the assembler that a symbol is weak. */ 172 #ifndef ASM_OUTPUT_WEAK_ALIAS 173 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF) 174 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE) \ 175 do \ 176 { \ 177 ASM_WEAKEN_LABEL (STREAM, NAME); \ 178 if (VALUE) \ 179 ASM_OUTPUT_DEF (STREAM, NAME, VALUE); \ 180 } \ 181 while (0) 182 #endif 183 #endif 184 185 /* This is how we tell the assembler that a symbol is a weak alias to 186 another symbol that doesn't require the other symbol to be defined. 187 Uses of the former will turn into weak uses of the latter, i.e., 188 uses that, in case the latter is undefined, will not cause errors, 189 and will add it to the symbol table as weak undefined. However, if 190 the latter is referenced directly, a strong reference prevails. */ 191 #ifndef ASM_OUTPUT_WEAKREF 192 #if defined HAVE_GAS_WEAKREF 193 #define ASM_OUTPUT_WEAKREF(FILE, DECL, NAME, VALUE) \ 194 do \ 195 { \ 196 fprintf ((FILE), "\t.weakref\t"); \ 197 assemble_name ((FILE), (NAME)); \ 198 fprintf ((FILE), ","); \ 199 assemble_name ((FILE), (VALUE)); \ 200 fprintf ((FILE), "\n"); \ 201 } \ 202 while (0) 203 #endif 204 #endif 205 206 /* How to emit a .type directive. */ 207 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE 208 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT 209 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE) \ 210 do \ 211 { \ 212 fputs (TYPE_ASM_OP, STREAM); \ 213 assemble_name (STREAM, NAME); \ 214 fputs (", ", STREAM); \ 215 fprintf (STREAM, TYPE_OPERAND_FMT, TYPE); \ 216 putc ('\n', STREAM); \ 217 } \ 218 while (0) 219 #endif 220 #endif 221 222 /* How to emit a .size directive. */ 223 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE 224 #ifdef SIZE_ASM_OP 225 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE) \ 226 do \ 227 { \ 228 HOST_WIDE_INT size_ = (SIZE); \ 229 fputs (SIZE_ASM_OP, STREAM); \ 230 assemble_name (STREAM, NAME); \ 231 fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \ 232 } \ 233 while (0) 234 235 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME) \ 236 do \ 237 { \ 238 fputs (SIZE_ASM_OP, STREAM); \ 239 assemble_name (STREAM, NAME); \ 240 fputs (", .-", STREAM); \ 241 assemble_name (STREAM, NAME); \ 242 putc ('\n', STREAM); \ 243 } \ 244 while (0) 245 246 #endif 247 #endif 248 249 /* This determines whether or not we support weak symbols. */ 250 #ifndef SUPPORTS_WEAK 251 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL) 252 #define SUPPORTS_WEAK 1 253 #else 254 #define SUPPORTS_WEAK 0 255 #endif 256 #endif 257 258 /* This determines whether or not we support the discriminator 259 attribute in the .loc directive. */ 260 #ifndef SUPPORTS_DISCRIMINATOR 261 #ifdef HAVE_GAS_DISCRIMINATOR 262 #define SUPPORTS_DISCRIMINATOR 1 263 #else 264 #define SUPPORTS_DISCRIMINATOR 0 265 #endif 266 #endif 267 268 /* This determines whether or not we support link-once semantics. */ 269 #ifndef SUPPORTS_ONE_ONLY 270 #ifdef MAKE_DECL_ONE_ONLY 271 #define SUPPORTS_ONE_ONLY 1 272 #else 273 #define SUPPORTS_ONE_ONLY 0 274 #endif 275 #endif 276 277 /* This determines whether weak symbols must be left out of a static 278 archive's table of contents. Defining this macro to be nonzero has 279 the consequence that certain symbols will not be made weak that 280 otherwise would be. The C++ ABI requires this macro to be zero; 281 see the documentation. */ 282 #ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC 283 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0 284 #endif 285 286 /* This determines whether or not we need linkonce unwind information. */ 287 #ifndef TARGET_USES_WEAK_UNWIND_INFO 288 #define TARGET_USES_WEAK_UNWIND_INFO 0 289 #endif 290 291 /* By default, there is no prefix on user-defined symbols. */ 292 #ifndef USER_LABEL_PREFIX 293 #define USER_LABEL_PREFIX "" 294 #endif 295 296 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to 297 provide a weak attribute. Else define it to nothing. 298 299 This would normally belong in ansidecl.h, but SUPPORTS_WEAK is 300 not available at that time. 301 302 Note, this is only for use by target files which we know are to be 303 compiled by GCC. */ 304 #ifndef TARGET_ATTRIBUTE_WEAK 305 # if SUPPORTS_WEAK 306 # define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak)) 307 # else 308 # define TARGET_ATTRIBUTE_WEAK 309 # endif 310 #endif 311 312 /* Determines whether we may use common symbols to represent one-only 313 semantics (a.k.a. "vague linkage"). */ 314 #ifndef USE_COMMON_FOR_ONE_ONLY 315 # define USE_COMMON_FOR_ONE_ONLY 1 316 #endif 317 318 /* By default we can assume that all global symbols are in one namespace, 319 across all shared libraries. */ 320 #ifndef MULTIPLE_SYMBOL_SPACES 321 # define MULTIPLE_SYMBOL_SPACES 0 322 #endif 323 324 /* If the target supports init_priority C++ attribute, give 325 SUPPORTS_INIT_PRIORITY a nonzero value. */ 326 #ifndef SUPPORTS_INIT_PRIORITY 327 #define SUPPORTS_INIT_PRIORITY 1 328 #endif /* SUPPORTS_INIT_PRIORITY */ 329 330 /* If duplicate library search directories can be removed from a 331 linker command without changing the linker's semantics, give this 332 symbol a nonzero. */ 333 #ifndef LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 334 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 0 335 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */ 336 337 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that 338 the rest of the DWARF 2 frame unwind support is also provided. */ 339 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX) \ 340 && !defined (TARGET_UNWIND_INFO) 341 #define DWARF2_UNWIND_INFO 1 342 #endif 343 344 /* If we have named sections, and we're using crtstuff to run ctors, 345 use them for registering eh frame information. */ 346 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \ 347 && !defined(EH_FRAME_IN_DATA_SECTION) 348 #ifndef EH_FRAME_SECTION_NAME 349 #define EH_FRAME_SECTION_NAME ".eh_frame" 350 #endif 351 #endif 352 353 /* On many systems, different EH table encodings are used under 354 difference circumstances. Some will require runtime relocations; 355 some will not. For those that do not require runtime relocations, 356 we would like to make the table read-only. However, since the 357 read-only tables may need to be combined with read-write tables 358 that do require runtime relocation, it is not safe to make the 359 tables read-only unless the linker will merge read-only and 360 read-write sections into a single read-write section. If your 361 linker does not have this ability, but your system is such that no 362 encoding used with non-PIC code will ever require a runtime 363 relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in 364 your target configuration file. */ 365 #ifndef EH_TABLES_CAN_BE_READ_ONLY 366 #ifdef HAVE_LD_RO_RW_SECTION_MIXING 367 #define EH_TABLES_CAN_BE_READ_ONLY 1 368 #else 369 #define EH_TABLES_CAN_BE_READ_ONLY 0 370 #endif 371 #endif 372 373 /* If we have named section and we support weak symbols, then use the 374 .jcr section for recording java classes which need to be registered 375 at program start-up time. */ 376 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK 377 #ifndef JCR_SECTION_NAME 378 #define JCR_SECTION_NAME ".jcr" 379 #endif 380 #endif 381 382 /* This decision to use a .jcr section can be overridden by defining 383 USE_JCR_SECTION to 0 in target file. This is necessary if target 384 can define JCR_SECTION_NAME but does not have crtstuff or 385 linker support for .jcr section. */ 386 #ifndef TARGET_USE_JCR_SECTION 387 #ifdef JCR_SECTION_NAME 388 #define TARGET_USE_JCR_SECTION 1 389 #else 390 #define TARGET_USE_JCR_SECTION 0 391 #endif 392 #endif 393 394 /* Number of hardware registers that go into the DWARF-2 unwind info. 395 If not defined, equals FIRST_PSEUDO_REGISTER */ 396 397 #ifndef DWARF_FRAME_REGISTERS 398 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER 399 #endif 400 401 /* How to renumber registers for dbx and gdb. If not defined, assume 402 no renumbering is necessary. */ 403 404 #ifndef DBX_REGISTER_NUMBER 405 #define DBX_REGISTER_NUMBER(REGNO) (REGNO) 406 #endif 407 408 /* Default sizes for base C types. If the sizes are different for 409 your target, you should override these values by defining the 410 appropriate symbols in your tm.h file. */ 411 412 #ifndef BITS_PER_UNIT 413 #define BITS_PER_UNIT 8 414 #endif 415 416 #ifndef BITS_PER_WORD 417 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD) 418 #endif 419 420 #ifndef CHAR_TYPE_SIZE 421 #define CHAR_TYPE_SIZE BITS_PER_UNIT 422 #endif 423 424 #ifndef BOOL_TYPE_SIZE 425 /* `bool' has size and alignment `1', on almost all platforms. */ 426 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE 427 #endif 428 429 #ifndef SHORT_TYPE_SIZE 430 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2)) 431 #endif 432 433 #ifndef INT_TYPE_SIZE 434 #define INT_TYPE_SIZE BITS_PER_WORD 435 #endif 436 437 #ifndef LONG_TYPE_SIZE 438 #define LONG_TYPE_SIZE BITS_PER_WORD 439 #endif 440 441 #ifndef LONG_LONG_TYPE_SIZE 442 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2) 443 #endif 444 445 #ifndef WCHAR_TYPE_SIZE 446 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE 447 #endif 448 449 #ifndef FLOAT_TYPE_SIZE 450 #define FLOAT_TYPE_SIZE BITS_PER_WORD 451 #endif 452 453 #ifndef DOUBLE_TYPE_SIZE 454 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2) 455 #endif 456 457 #ifndef LONG_DOUBLE_TYPE_SIZE 458 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2) 459 #endif 460 461 #ifndef DECIMAL32_TYPE_SIZE 462 #define DECIMAL32_TYPE_SIZE 32 463 #endif 464 465 #ifndef DECIMAL64_TYPE_SIZE 466 #define DECIMAL64_TYPE_SIZE 64 467 #endif 468 469 #ifndef DECIMAL128_TYPE_SIZE 470 #define DECIMAL128_TYPE_SIZE 128 471 #endif 472 473 #ifndef SHORT_FRACT_TYPE_SIZE 474 #define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT 475 #endif 476 477 #ifndef FRACT_TYPE_SIZE 478 #define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2) 479 #endif 480 481 #ifndef LONG_FRACT_TYPE_SIZE 482 #define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4) 483 #endif 484 485 #ifndef LONG_LONG_FRACT_TYPE_SIZE 486 #define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8) 487 #endif 488 489 #ifndef SHORT_ACCUM_TYPE_SIZE 490 #define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2) 491 #endif 492 493 #ifndef ACCUM_TYPE_SIZE 494 #define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2) 495 #endif 496 497 #ifndef LONG_ACCUM_TYPE_SIZE 498 #define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2) 499 #endif 500 501 #ifndef LONG_LONG_ACCUM_TYPE_SIZE 502 #define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2) 503 #endif 504 505 /* Width in bits of a pointer. Mind the value of the macro `Pmode'. */ 506 #ifndef POINTER_SIZE 507 #define POINTER_SIZE BITS_PER_WORD 508 #endif 509 510 #ifndef PIC_OFFSET_TABLE_REGNUM 511 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM 512 #endif 513 514 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES 515 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0 516 #endif 517 518 #ifndef TARGET_DECLSPEC 519 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES 520 /* If the target supports the "dllimport" attribute, users are 521 probably used to the "__declspec" syntax. */ 522 #define TARGET_DECLSPEC 1 523 #else 524 #define TARGET_DECLSPEC 0 525 #endif 526 #endif 527 528 /* By default, the preprocessor should be invoked the same way in C++ 529 as in C. */ 530 #ifndef CPLUSPLUS_CPP_SPEC 531 #ifdef CPP_SPEC 532 #define CPLUSPLUS_CPP_SPEC CPP_SPEC 533 #endif 534 #endif 535 536 #ifndef ACCUMULATE_OUTGOING_ARGS 537 #define ACCUMULATE_OUTGOING_ARGS 0 538 #endif 539 540 /* Supply a default definition for PUSH_ARGS. */ 541 #ifndef PUSH_ARGS 542 #ifdef PUSH_ROUNDING 543 #define PUSH_ARGS !ACCUMULATE_OUTGOING_ARGS 544 #else 545 #define PUSH_ARGS 0 546 #endif 547 #endif 548 549 /* Decide whether a function's arguments should be processed 550 from first to last or from last to first. 551 552 They should if the stack and args grow in opposite directions, but 553 only if we have push insns. */ 554 555 #ifdef PUSH_ROUNDING 556 557 #ifndef PUSH_ARGS_REVERSED 558 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD) 559 #define PUSH_ARGS_REVERSED PUSH_ARGS 560 #endif 561 #endif 562 563 #endif 564 565 #ifndef PUSH_ARGS_REVERSED 566 #define PUSH_ARGS_REVERSED 0 567 #endif 568 569 /* Default value for the alignment (in bits) a C conformant malloc has to 570 provide. This default is intended to be safe and always correct. */ 571 #ifndef MALLOC_ABI_ALIGNMENT 572 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD 573 #endif 574 575 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY. 576 STACK_BOUNDARY is required. */ 577 #ifndef PREFERRED_STACK_BOUNDARY 578 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY 579 #endif 580 581 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not 582 defined. */ 583 #ifndef INCOMING_STACK_BOUNDARY 584 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY 585 #endif 586 587 #ifndef TARGET_DEFAULT_PACK_STRUCT 588 #define TARGET_DEFAULT_PACK_STRUCT 0 589 #endif 590 591 /* By default, the C++ compiler will use function addresses in the 592 vtable entries. Setting this nonzero tells the compiler to use 593 function descriptors instead. The value of this macro says how 594 many words wide the descriptor is (normally 2). It is assumed 595 that the address of a function descriptor may be treated as a 596 pointer to a function. */ 597 #ifndef TARGET_VTABLE_USES_DESCRIPTORS 598 #define TARGET_VTABLE_USES_DESCRIPTORS 0 599 #endif 600 601 /* By default, the vtable entries are void pointers, the so the alignment 602 is the same as pointer alignment. The value of this macro specifies 603 the alignment of the vtable entry in bits. It should be defined only 604 when special alignment is necessary. */ 605 #ifndef TARGET_VTABLE_ENTRY_ALIGN 606 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE 607 #endif 608 609 /* There are a few non-descriptor entries in the vtable at offsets below 610 zero. If these entries must be padded (say, to preserve the alignment 611 specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of 612 words in each data entry. */ 613 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE 614 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1 615 #endif 616 617 /* Decide whether it is safe to use a local alias for a virtual function 618 when constructing thunks. */ 619 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P 620 #ifdef ASM_OUTPUT_DEF 621 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1 622 #else 623 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0 624 #endif 625 #endif 626 627 /* Select a format to encode pointers in exception handling data. We 628 prefer those that result in fewer dynamic relocations. Assume no 629 special support here and encode direct references. */ 630 #ifndef ASM_PREFERRED_EH_DATA_FORMAT 631 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) DW_EH_PE_absptr 632 #endif 633 634 /* By default, the C++ compiler will use the lowest bit of the pointer 635 to function to indicate a pointer-to-member-function points to a 636 virtual member function. However, if FUNCTION_BOUNDARY indicates 637 function addresses aren't always even, the lowest bit of the delta 638 field will be used. */ 639 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION 640 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \ 641 (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \ 642 ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta) 643 #endif 644 645 #ifndef DEFAULT_GDB_EXTENSIONS 646 #define DEFAULT_GDB_EXTENSIONS 1 647 #endif 648 649 /* If more than one debugging type is supported, you must define 650 PREFERRED_DEBUGGING_TYPE to choose the default. */ 651 652 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \ 653 + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \ 654 + defined (VMS_DEBUGGING_INFO)) 655 #ifndef PREFERRED_DEBUGGING_TYPE 656 #error You must define PREFERRED_DEBUGGING_TYPE 657 #endif /* no PREFERRED_DEBUGGING_TYPE */ 658 659 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE 660 here so other code needn't care. */ 661 #elif defined DBX_DEBUGGING_INFO 662 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG 663 664 #elif defined SDB_DEBUGGING_INFO 665 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG 666 667 #elif defined DWARF2_DEBUGGING_INFO 668 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG 669 670 #elif defined VMS_DEBUGGING_INFO 671 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG 672 673 #elif defined XCOFF_DEBUGGING_INFO 674 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG 675 676 #else 677 /* No debugging format is supported by this target. */ 678 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG 679 #endif 680 681 #ifndef LARGEST_EXPONENT_IS_NORMAL 682 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0 683 #endif 684 685 #ifndef ROUND_TOWARDS_ZERO 686 #define ROUND_TOWARDS_ZERO 0 687 #endif 688 689 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL 690 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false 691 #endif 692 693 /* True if the targets integer-comparison functions return { 0, 1, 2 694 } to indicate { <, ==, > }. False if { -1, 0, 1 } is used 695 instead. The libgcc routines are biased. */ 696 #ifndef TARGET_LIB_INT_CMP_BIASED 697 #define TARGET_LIB_INT_CMP_BIASED (true) 698 #endif 699 700 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files, 701 then the word-endianness is the same as for integers. */ 702 #ifndef FLOAT_WORDS_BIG_ENDIAN 703 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN 704 #endif 705 706 #ifndef TARGET_FLT_EVAL_METHOD 707 #define TARGET_FLT_EVAL_METHOD 0 708 #endif 709 710 #ifndef TARGET_DEC_EVAL_METHOD 711 #define TARGET_DEC_EVAL_METHOD 2 712 #endif 713 714 #ifndef HOT_TEXT_SECTION_NAME 715 #define HOT_TEXT_SECTION_NAME ".text.hot" 716 #endif 717 718 #ifndef UNLIKELY_EXECUTED_TEXT_SECTION_NAME 719 #define UNLIKELY_EXECUTED_TEXT_SECTION_NAME ".text.unlikely" 720 #endif 721 722 #ifndef HAS_LONG_COND_BRANCH 723 #define HAS_LONG_COND_BRANCH 0 724 #endif 725 726 #ifndef HAS_LONG_UNCOND_BRANCH 727 #define HAS_LONG_UNCOND_BRANCH 0 728 #endif 729 730 /* By default, only attempt to parallelize bitwise operations, and 731 possibly adds/subtracts using bit-twiddling. */ 732 #ifndef UNITS_PER_SIMD_WORD 733 #define UNITS_PER_SIMD_WORD(MODE) UNITS_PER_WORD 734 #endif 735 736 /* Determine whether __cxa_atexit, rather than atexit, is used to 737 register C++ destructors for local statics and global objects. */ 738 #ifndef DEFAULT_USE_CXA_ATEXIT 739 #define DEFAULT_USE_CXA_ATEXIT 0 740 #endif 741 742 /* If none of these macros are defined, the port must use the new 743 technique of defining constraints in the machine description. 744 tm_p.h will define those macros that machine-independent code 745 still uses. */ 746 #if !defined CONSTRAINT_LEN \ 747 && !defined REG_CLASS_FROM_LETTER \ 748 && !defined REG_CLASS_FROM_CONSTRAINT \ 749 && !defined CONST_OK_FOR_LETTER_P \ 750 && !defined CONST_OK_FOR_CONSTRAINT_P \ 751 && !defined CONST_DOUBLE_OK_FOR_LETTER_P \ 752 && !defined CONST_DOUBLE_OK_FOR_CONSTRAINT_P \ 753 && !defined EXTRA_CONSTRAINT \ 754 && !defined EXTRA_CONSTRAINT_STR \ 755 && !defined EXTRA_MEMORY_CONSTRAINT \ 756 && !defined EXTRA_ADDRESS_CONSTRAINT 757 758 #define USE_MD_CONSTRAINTS 759 760 #if GCC_VERSION >= 3000 && defined IN_GCC 761 /* These old constraint macros shouldn't appear anywhere in a 762 configuration using MD constraint definitions. */ 763 #pragma GCC poison REG_CLASS_FROM_LETTER CONST_OK_FOR_LETTER_P \ 764 CONST_DOUBLE_OK_FOR_LETTER_P EXTRA_CONSTRAINT 765 #endif 766 767 #else /* old constraint mechanism in use */ 768 769 /* Determine whether extra constraint letter should be handled 770 via address reload (like 'o'). */ 771 #ifndef EXTRA_MEMORY_CONSTRAINT 772 #define EXTRA_MEMORY_CONSTRAINT(C,STR) 0 773 #endif 774 775 /* Determine whether extra constraint letter should be handled 776 as an address (like 'p'). */ 777 #ifndef EXTRA_ADDRESS_CONSTRAINT 778 #define EXTRA_ADDRESS_CONSTRAINT(C,STR) 0 779 #endif 780 781 /* When a port defines CONSTRAINT_LEN, it should use DEFAULT_CONSTRAINT_LEN 782 for all the characters that it does not want to change, so things like the 783 'length' of a digit in a matching constraint is an implementation detail, 784 and not part of the interface. */ 785 #define DEFAULT_CONSTRAINT_LEN(C,STR) 1 786 787 #ifndef CONSTRAINT_LEN 788 #define CONSTRAINT_LEN(C,STR) DEFAULT_CONSTRAINT_LEN (C, STR) 789 #endif 790 791 #if defined (CONST_OK_FOR_LETTER_P) && ! defined (CONST_OK_FOR_CONSTRAINT_P) 792 #define CONST_OK_FOR_CONSTRAINT_P(VAL,C,STR) CONST_OK_FOR_LETTER_P (VAL, C) 793 #endif 794 795 #if defined (CONST_DOUBLE_OK_FOR_LETTER_P) && ! defined (CONST_DOUBLE_OK_FOR_CONSTRAINT_P) 796 #define CONST_DOUBLE_OK_FOR_CONSTRAINT_P(OP,C,STR) \ 797 CONST_DOUBLE_OK_FOR_LETTER_P (OP, C) 798 #endif 799 800 #ifndef REG_CLASS_FROM_CONSTRAINT 801 #define REG_CLASS_FROM_CONSTRAINT(C,STR) REG_CLASS_FROM_LETTER (C) 802 #endif 803 804 #if defined (EXTRA_CONSTRAINT) && ! defined (EXTRA_CONSTRAINT_STR) 805 #define EXTRA_CONSTRAINT_STR(OP, C,STR) EXTRA_CONSTRAINT (OP, C) 806 #endif 807 808 #endif /* old constraint mechanism in use */ 809 810 #ifndef REGISTER_MOVE_COST 811 #define REGISTER_MOVE_COST(m, x, y) 2 812 #endif 813 814 /* Determine whether the entire c99 runtime 815 is present in the runtime library. */ 816 #ifndef TARGET_C99_FUNCTIONS 817 #define TARGET_C99_FUNCTIONS 0 818 #endif 819 820 /* Determine whether the target runtime library has 821 a sincos implementation following the GNU extension. */ 822 #ifndef TARGET_HAS_SINCOS 823 #define TARGET_HAS_SINCOS 0 824 #endif 825 826 /* Indicate that CLZ and CTZ are undefined at zero. */ 827 #ifndef CLZ_DEFINED_VALUE_AT_ZERO 828 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0 829 #endif 830 #ifndef CTZ_DEFINED_VALUE_AT_ZERO 831 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0 832 #endif 833 834 /* Provide a default value for STORE_FLAG_VALUE. */ 835 #ifndef STORE_FLAG_VALUE 836 #define STORE_FLAG_VALUE 1 837 #endif 838 839 /* This macro is used to determine what the largest unit size that 840 move_by_pieces can use is. */ 841 842 /* MOVE_MAX_PIECES is the number of bytes at a time which we can 843 move efficiently, as opposed to MOVE_MAX which is the maximum 844 number of bytes we can move with a single instruction. */ 845 846 #ifndef MOVE_MAX_PIECES 847 #define MOVE_MAX_PIECES MOVE_MAX 848 #endif 849 850 #ifndef STACK_POINTER_OFFSET 851 #define STACK_POINTER_OFFSET 0 852 #endif 853 854 #ifndef LOCAL_REGNO 855 #define LOCAL_REGNO(REGNO) 0 856 #endif 857 858 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, 859 the stack pointer does not matter. The value is tested only in 860 functions that have frame pointers. */ 861 #ifndef EXIT_IGNORE_STACK 862 #define EXIT_IGNORE_STACK 0 863 #endif 864 865 /* Assume that case vectors are not pc-relative. */ 866 #ifndef CASE_VECTOR_PC_RELATIVE 867 #define CASE_VECTOR_PC_RELATIVE 0 868 #endif 869 870 /* Assume that trampolines need function alignment. */ 871 #ifndef TRAMPOLINE_ALIGNMENT 872 #define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY 873 #endif 874 875 /* Register mappings for target machines without register windows. */ 876 #ifndef INCOMING_REGNO 877 #define INCOMING_REGNO(N) (N) 878 #endif 879 880 #ifndef OUTGOING_REGNO 881 #define OUTGOING_REGNO(N) (N) 882 #endif 883 884 #ifndef SHIFT_COUNT_TRUNCATED 885 #define SHIFT_COUNT_TRUNCATED 0 886 #endif 887 888 #ifndef LEGITIMIZE_ADDRESS 889 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) 890 #endif 891 892 #ifndef LEGITIMATE_PIC_OPERAND_P 893 #define LEGITIMATE_PIC_OPERAND_P(X) 1 894 #endif 895 896 #ifndef TARGET_MEM_CONSTRAINT 897 #define TARGET_MEM_CONSTRAINT 'm' 898 #endif 899 900 #ifndef REVERSIBLE_CC_MODE 901 #define REVERSIBLE_CC_MODE(MODE) 0 902 #endif 903 904 /* Biggest alignment supported by the object file format of this machine. */ 905 #ifndef MAX_OFILE_ALIGNMENT 906 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT 907 #endif 908 909 #ifndef FRAME_GROWS_DOWNWARD 910 #define FRAME_GROWS_DOWNWARD 0 911 #endif 912 913 /* On most machines, the CFA coincides with the first incoming parm. */ 914 #ifndef ARG_POINTER_CFA_OFFSET 915 #define ARG_POINTER_CFA_OFFSET(FNDECL) FIRST_PARM_OFFSET (FNDECL) 916 #endif 917 918 /* On most machines, we use the CFA as DW_AT_frame_base. */ 919 #ifndef CFA_FRAME_BASE_OFFSET 920 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0 921 #endif 922 923 /* The offset from the incoming value of %sp to the top of the stack frame 924 for the current function. */ 925 #ifndef INCOMING_FRAME_SP_OFFSET 926 #define INCOMING_FRAME_SP_OFFSET 0 927 #endif 928 929 #ifndef HARD_REGNO_NREGS_HAS_PADDING 930 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0 931 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1 932 #endif 933 934 #ifndef OUTGOING_REG_PARM_STACK_SPACE 935 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0 936 #endif 937 938 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by 939 the backend. MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best 940 effort stack alignment supported by the backend. If the backend 941 supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and 942 MAX_STACK_ALIGNMENT are the same. Otherwise, the incoming stack 943 boundary will limit the maximum guaranteed stack alignment. */ 944 #ifdef MAX_STACK_ALIGNMENT 945 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT 946 #else 947 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY 948 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY 949 #endif 950 951 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY) 952 953 #ifndef LOCAL_ALIGNMENT 954 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT 955 #endif 956 957 #ifndef STACK_SLOT_ALIGNMENT 958 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \ 959 ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN)) 960 #endif 961 962 #ifndef LOCAL_DECL_ALIGNMENT 963 #define LOCAL_DECL_ALIGNMENT(DECL) \ 964 LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL)) 965 #endif 966 967 #ifndef MINIMUM_ALIGNMENT 968 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN) 969 #endif 970 971 /* Alignment value for attribute ((aligned)). */ 972 #ifndef ATTRIBUTE_ALIGNED_VALUE 973 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT 974 #endif 975 976 #endif /* ! GCC_DEFAULTS_H */ 977
