1 /* Definitions of various defaults for tm.h macros. 2 Copyright (C) 1992-2022 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 *_my_file = (MYFILE); \ 65 const unsigned char *_hide_p = (const unsigned char *) (MYSTRING); \ 66 int _hide_thissize = (MYLENGTH); \ 67 { \ 68 const unsigned char *p = _hide_p; \ 69 int thissize = _hide_thissize; \ 70 int i; \ 71 fprintf (_my_file, "\t.ascii \""); \ 72 \ 73 for (i = 0; i < thissize; i++) \ 74 { \ 75 int c = p[i]; \ 76 if (c == '\"' || c == '\\') \ 77 putc ('\\', _my_file); \ 78 if (ISPRINT (c)) \ 79 putc (c, _my_file); \ 80 else \ 81 { \ 82 fprintf (_my_file, "\\%o", c); \ 83 /* After an octal-escape, if a digit follows, \ 84 terminate one string constant and start another. \ 85 The VAX assembler fails to stop reading the escape \ 86 after three digits, so this is the only way we \ 87 can get it to parse the data properly. */ \ 88 if (i < thissize - 1 && ISDIGIT (p[i + 1])) \ 89 fprintf (_my_file, "\"\n\t.ascii \""); \ 90 } \ 91 } \ 92 fprintf (_my_file, "\"\n"); \ 93 } \ 94 } \ 95 while (0) 96 #endif 97 98 /* This is how we tell the assembler to equate two values. */ 99 #ifdef SET_ASM_OP 100 #ifndef ASM_OUTPUT_DEF 101 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \ 102 do { fprintf ((FILE), "%s", SET_ASM_OP); \ 103 assemble_name (FILE, LABEL1); \ 104 fprintf (FILE, ","); \ 105 assemble_name (FILE, LABEL2); \ 106 fprintf (FILE, "\n"); \ 107 } while (0) 108 #endif 109 #endif 110 111 #ifndef IFUNC_ASM_TYPE 112 #define IFUNC_ASM_TYPE "gnu_indirect_function" 113 #endif 114 115 #ifndef TLS_COMMON_ASM_OP 116 #define TLS_COMMON_ASM_OP ".tls_common" 117 #endif 118 119 #if defined (HAVE_AS_TLS) && !defined (ASM_OUTPUT_TLS_COMMON) 120 #define ASM_OUTPUT_TLS_COMMON(FILE, DECL, NAME, SIZE) \ 121 do \ 122 { \ 123 fprintf ((FILE), "\t%s\t", TLS_COMMON_ASM_OP); \ 124 assemble_name ((FILE), (NAME)); \ 125 fprintf ((FILE), "," HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", \ 126 (SIZE), DECL_ALIGN (DECL) / BITS_PER_UNIT); \ 127 } \ 128 while (0) 129 #endif 130 131 /* Decide whether to defer emitting the assembler output for an equate 132 of two values. The default is to not defer output. */ 133 #ifndef TARGET_DEFERRED_OUTPUT_DEFS 134 #define TARGET_DEFERRED_OUTPUT_DEFS(DECL,TARGET) false 135 #endif 136 137 /* This is how to output the definition of a user-level label named 138 NAME, such as the label on variable NAME. */ 139 140 #ifndef ASM_OUTPUT_LABEL 141 #define ASM_OUTPUT_LABEL(FILE,NAME) \ 142 do { \ 143 assemble_name ((FILE), (NAME)); \ 144 fputs (":\n", (FILE)); \ 145 } while (0) 146 #endif 147 148 /* This is how to output the definition of a user-level label named 149 NAME, such as the label on a function. */ 150 151 #ifndef ASM_OUTPUT_FUNCTION_LABEL 152 #define ASM_OUTPUT_FUNCTION_LABEL(FILE, NAME, DECL) \ 153 ASM_OUTPUT_LABEL ((FILE), (NAME)) 154 #endif 155 156 /* Output the definition of a compiler-generated label named NAME. */ 157 #ifndef ASM_OUTPUT_INTERNAL_LABEL 158 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,NAME) \ 159 do { \ 160 assemble_name_raw ((FILE), (NAME)); \ 161 fputs (":\n", (FILE)); \ 162 } while (0) 163 #endif 164 165 /* This is how to output a reference to a user-level label named NAME. */ 166 167 #ifndef ASM_OUTPUT_LABELREF 168 #define ASM_OUTPUT_LABELREF(FILE,NAME) \ 169 do { \ 170 fputs (user_label_prefix, (FILE)); \ 171 fputs ((NAME), (FILE)); \ 172 } while (0) 173 #endif 174 175 /* Allow target to print debug info labels specially. This is useful for 176 VLIW targets, since debug info labels should go into the middle of 177 instruction bundles instead of breaking them. */ 178 179 #ifndef ASM_OUTPUT_DEBUG_LABEL 180 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \ 181 (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM) 182 #endif 183 184 /* This is how we tell the assembler that a symbol is weak. */ 185 #ifndef ASM_OUTPUT_WEAK_ALIAS 186 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF) 187 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE) \ 188 do \ 189 { \ 190 ASM_WEAKEN_LABEL (STREAM, NAME); \ 191 if (VALUE) \ 192 ASM_OUTPUT_DEF (STREAM, NAME, VALUE); \ 193 } \ 194 while (0) 195 #endif 196 #endif 197 198 /* This is how we tell the assembler that a symbol is a weak alias to 199 another symbol that doesn't require the other symbol to be defined. 200 Uses of the former will turn into weak uses of the latter, i.e., 201 uses that, in case the latter is undefined, will not cause errors, 202 and will add it to the symbol table as weak undefined. However, if 203 the latter is referenced directly, a strong reference prevails. */ 204 #ifndef ASM_OUTPUT_WEAKREF 205 #if defined HAVE_GAS_WEAKREF 206 #define ASM_OUTPUT_WEAKREF(FILE, DECL, NAME, VALUE) \ 207 do \ 208 { \ 209 fprintf ((FILE), "\t.weakref\t"); \ 210 assemble_name ((FILE), (NAME)); \ 211 fprintf ((FILE), ","); \ 212 assemble_name ((FILE), (VALUE)); \ 213 fprintf ((FILE), "\n"); \ 214 } \ 215 while (0) 216 #endif 217 #endif 218 219 /* How to emit a .type directive. */ 220 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE 221 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT 222 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE) \ 223 do \ 224 { \ 225 fputs (TYPE_ASM_OP, STREAM); \ 226 assemble_name (STREAM, NAME); \ 227 fputs (", ", STREAM); \ 228 fprintf (STREAM, TYPE_OPERAND_FMT, TYPE); \ 229 putc ('\n', STREAM); \ 230 } \ 231 while (0) 232 #endif 233 #endif 234 235 /* How to emit a .size directive. */ 236 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE 237 #ifdef SIZE_ASM_OP 238 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE) \ 239 do \ 240 { \ 241 HOST_WIDE_INT size_ = (SIZE); \ 242 fputs (SIZE_ASM_OP, STREAM); \ 243 assemble_name (STREAM, NAME); \ 244 fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \ 245 } \ 246 while (0) 247 248 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME) \ 249 do \ 250 { \ 251 fputs (SIZE_ASM_OP, STREAM); \ 252 assemble_name (STREAM, NAME); \ 253 fputs (", .-", STREAM); \ 254 assemble_name (STREAM, NAME); \ 255 putc ('\n', STREAM); \ 256 } \ 257 while (0) 258 259 #endif 260 #endif 261 262 /* This determines whether or not we support weak symbols. SUPPORTS_WEAK 263 must be a preprocessor constant. */ 264 #ifndef SUPPORTS_WEAK 265 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL) 266 #define SUPPORTS_WEAK 1 267 #else 268 #define SUPPORTS_WEAK 0 269 #endif 270 #endif 271 272 /* This determines whether or not we support weak symbols during target 273 code generation. TARGET_SUPPORTS_WEAK can be any valid C expression. */ 274 #ifndef TARGET_SUPPORTS_WEAK 275 #define TARGET_SUPPORTS_WEAK (SUPPORTS_WEAK) 276 #endif 277 278 /* This determines whether or not we support the discriminator 279 attribute in the .loc directive. */ 280 #ifndef SUPPORTS_DISCRIMINATOR 281 #ifdef HAVE_GAS_DISCRIMINATOR 282 #define SUPPORTS_DISCRIMINATOR 1 283 #else 284 #define SUPPORTS_DISCRIMINATOR 0 285 #endif 286 #endif 287 288 /* This determines whether or not we support marking sections with 289 SHF_GNU_RETAIN flag. Also require .init_array/.fini_array section 290 for constructors and destructors. */ 291 #ifndef SUPPORTS_SHF_GNU_RETAIN 292 #if HAVE_GAS_SHF_GNU_RETAIN && HAVE_INITFINI_ARRAY_SUPPORT 293 #define SUPPORTS_SHF_GNU_RETAIN 1 294 #else 295 #define SUPPORTS_SHF_GNU_RETAIN 0 296 #endif 297 #endif 298 299 /* This determines whether or not we support link-once semantics. */ 300 #ifndef SUPPORTS_ONE_ONLY 301 #ifdef MAKE_DECL_ONE_ONLY 302 #define SUPPORTS_ONE_ONLY 1 303 #else 304 #define SUPPORTS_ONE_ONLY 0 305 #endif 306 #endif 307 308 /* This determines whether weak symbols must be left out of a static 309 archive's table of contents. Defining this macro to be nonzero has 310 the consequence that certain symbols will not be made weak that 311 otherwise would be. The C++ ABI requires this macro to be zero; 312 see the documentation. */ 313 #ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC 314 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0 315 #endif 316 317 /* This determines whether or not we need linkonce unwind information. */ 318 #ifndef TARGET_USES_WEAK_UNWIND_INFO 319 #define TARGET_USES_WEAK_UNWIND_INFO 0 320 #endif 321 322 /* By default, there is no prefix on user-defined symbols. */ 323 #ifndef USER_LABEL_PREFIX 324 #define USER_LABEL_PREFIX "" 325 #endif 326 327 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to 328 provide a weak attribute. Else define it to nothing. 329 330 This would normally belong in ansidecl.h, but SUPPORTS_WEAK is 331 not available at that time. 332 333 Note, this is only for use by target files which we know are to be 334 compiled by GCC. */ 335 #ifndef TARGET_ATTRIBUTE_WEAK 336 # if SUPPORTS_WEAK 337 # define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak)) 338 # else 339 # define TARGET_ATTRIBUTE_WEAK 340 # endif 341 #endif 342 343 /* By default we can assume that all global symbols are in one namespace, 344 across all shared libraries. */ 345 #ifndef MULTIPLE_SYMBOL_SPACES 346 # define MULTIPLE_SYMBOL_SPACES 0 347 #endif 348 349 /* If the target supports init_priority C++ attribute, give 350 SUPPORTS_INIT_PRIORITY a nonzero value. */ 351 #ifndef SUPPORTS_INIT_PRIORITY 352 #define SUPPORTS_INIT_PRIORITY 1 353 #endif /* SUPPORTS_INIT_PRIORITY */ 354 355 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that 356 the rest of the DWARF 2 frame unwind support is also provided. */ 357 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX) 358 #define DWARF2_UNWIND_INFO 1 359 #endif 360 361 /* If we have named sections, and we're using crtstuff to run ctors, 362 use them for registering eh frame information. */ 363 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \ 364 && !defined (EH_FRAME_THROUGH_COLLECT2) 365 #ifndef EH_FRAME_SECTION_NAME 366 #define EH_FRAME_SECTION_NAME ".eh_frame" 367 #endif 368 #endif 369 370 /* On many systems, different EH table encodings are used under 371 difference circumstances. Some will require runtime relocations; 372 some will not. For those that do not require runtime relocations, 373 we would like to make the table read-only. However, since the 374 read-only tables may need to be combined with read-write tables 375 that do require runtime relocation, it is not safe to make the 376 tables read-only unless the linker will merge read-only and 377 read-write sections into a single read-write section. If your 378 linker does not have this ability, but your system is such that no 379 encoding used with non-PIC code will ever require a runtime 380 relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in 381 your target configuration file. */ 382 #ifndef EH_TABLES_CAN_BE_READ_ONLY 383 #ifdef HAVE_LD_RO_RW_SECTION_MIXING 384 #define EH_TABLES_CAN_BE_READ_ONLY 1 385 #else 386 #define EH_TABLES_CAN_BE_READ_ONLY 0 387 #endif 388 #endif 389 390 /* Provide defaults for stuff that may not be defined when using 391 sjlj exceptions. */ 392 #ifndef EH_RETURN_DATA_REGNO 393 #define EH_RETURN_DATA_REGNO(N) INVALID_REGNUM 394 #endif 395 396 /* Offset between the eh handler address and entry in eh tables. */ 397 #ifndef RETURN_ADDR_OFFSET 398 #define RETURN_ADDR_OFFSET 0 399 #endif 400 401 #ifndef MASK_RETURN_ADDR 402 #define MASK_RETURN_ADDR NULL_RTX 403 #endif 404 405 /* Number of hardware registers that go into the DWARF-2 unwind info. 406 If not defined, equals FIRST_PSEUDO_REGISTER */ 407 408 #ifndef DWARF_FRAME_REGISTERS 409 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER 410 #endif 411 412 /* Offsets recorded in opcodes are a multiple of this alignment factor. */ 413 #ifndef DWARF_CIE_DATA_ALIGNMENT 414 #ifdef STACK_GROWS_DOWNWARD 415 #define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD)) 416 #else 417 #define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD) 418 #endif 419 #endif 420 421 /* The DWARF 2 CFA column which tracks the return address. Normally this 422 is the column for PC, or the first column after all of the hard 423 registers. */ 424 #ifndef DWARF_FRAME_RETURN_COLUMN 425 #ifdef PC_REGNUM 426 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM) 427 #else 428 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGISTERS 429 #endif 430 #endif 431 432 /* How to renumber registers for dbx and gdb. If not defined, assume 433 no renumbering is necessary. */ 434 435 #ifndef DBX_REGISTER_NUMBER 436 #define DBX_REGISTER_NUMBER(REGNO) (REGNO) 437 #endif 438 439 /* The mapping from gcc register number to DWARF 2 CFA column number. 440 By default, we just provide columns for all registers. */ 441 #ifndef DWARF_FRAME_REGNUM 442 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG) 443 #endif 444 445 /* The mapping from dwarf CFA reg number to internal dwarf reg numbers. */ 446 #ifndef DWARF_REG_TO_UNWIND_COLUMN 447 #define DWARF_REG_TO_UNWIND_COLUMN(REGNO) (REGNO) 448 #endif 449 450 /* Map register numbers held in the call frame info that gcc has 451 collected using DWARF_FRAME_REGNUM to those that should be output in 452 .debug_frame and .eh_frame. */ 453 #ifndef DWARF2_FRAME_REG_OUT 454 #define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) (REGNO) 455 #endif 456 457 /* The size of addresses as they appear in the Dwarf 2 data. 458 Some architectures use word addresses to refer to code locations, 459 but Dwarf 2 info always uses byte addresses. On such machines, 460 Dwarf 2 addresses need to be larger than the architecture's 461 pointers. */ 462 #ifndef DWARF2_ADDR_SIZE 463 #define DWARF2_ADDR_SIZE ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT) 464 #endif 465 466 /* The size in bytes of a DWARF field indicating an offset or length 467 relative to a debug info section, specified to be 4 bytes in the 468 DWARF-2 specification. The SGI/MIPS ABI defines it to be the same 469 as PTR_SIZE. */ 470 #ifndef DWARF_OFFSET_SIZE 471 #define DWARF_OFFSET_SIZE 4 472 #endif 473 474 /* The size in bytes of a DWARF 4 type signature. */ 475 #ifndef DWARF_TYPE_SIGNATURE_SIZE 476 #define DWARF_TYPE_SIGNATURE_SIZE 8 477 #endif 478 479 /* Default sizes for base C types. If the sizes are different for 480 your target, you should override these values by defining the 481 appropriate symbols in your tm.h file. */ 482 483 #ifndef BITS_PER_WORD 484 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD) 485 #endif 486 487 #ifndef CHAR_TYPE_SIZE 488 #define CHAR_TYPE_SIZE BITS_PER_UNIT 489 #endif 490 491 #ifndef BOOL_TYPE_SIZE 492 /* `bool' has size and alignment `1', on almost all platforms. */ 493 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE 494 #endif 495 496 #ifndef SHORT_TYPE_SIZE 497 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2)) 498 #endif 499 500 #ifndef INT_TYPE_SIZE 501 #define INT_TYPE_SIZE BITS_PER_WORD 502 #endif 503 504 #ifndef LONG_TYPE_SIZE 505 #define LONG_TYPE_SIZE BITS_PER_WORD 506 #endif 507 508 #ifndef LONG_LONG_TYPE_SIZE 509 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2) 510 #endif 511 512 #ifndef WCHAR_TYPE_SIZE 513 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE 514 #endif 515 516 #ifndef FLOAT_TYPE_SIZE 517 #define FLOAT_TYPE_SIZE BITS_PER_WORD 518 #endif 519 520 #ifndef DOUBLE_TYPE_SIZE 521 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2) 522 #endif 523 524 #ifndef LONG_DOUBLE_TYPE_SIZE 525 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2) 526 #endif 527 528 #ifndef DECIMAL32_TYPE_SIZE 529 #define DECIMAL32_TYPE_SIZE 32 530 #endif 531 532 #ifndef DECIMAL64_TYPE_SIZE 533 #define DECIMAL64_TYPE_SIZE 64 534 #endif 535 536 #ifndef DECIMAL128_TYPE_SIZE 537 #define DECIMAL128_TYPE_SIZE 128 538 #endif 539 540 #ifndef SHORT_FRACT_TYPE_SIZE 541 #define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT 542 #endif 543 544 #ifndef FRACT_TYPE_SIZE 545 #define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2) 546 #endif 547 548 #ifndef LONG_FRACT_TYPE_SIZE 549 #define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4) 550 #endif 551 552 #ifndef LONG_LONG_FRACT_TYPE_SIZE 553 #define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8) 554 #endif 555 556 #ifndef SHORT_ACCUM_TYPE_SIZE 557 #define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2) 558 #endif 559 560 #ifndef ACCUM_TYPE_SIZE 561 #define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2) 562 #endif 563 564 #ifndef LONG_ACCUM_TYPE_SIZE 565 #define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2) 566 #endif 567 568 #ifndef LONG_LONG_ACCUM_TYPE_SIZE 569 #define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2) 570 #endif 571 572 /* We let tm.h override the types used here, to handle trivial differences 573 such as the choice of unsigned int or long unsigned int for size_t. 574 When machines start needing nontrivial differences in the size type, 575 it would be best to do something here to figure out automatically 576 from other information what type to use. */ 577 578 #ifndef SIZE_TYPE 579 #define SIZE_TYPE "long unsigned int" 580 #endif 581 582 #ifndef SIZETYPE 583 #define SIZETYPE SIZE_TYPE 584 #endif 585 586 #ifndef PID_TYPE 587 #define PID_TYPE "int" 588 #endif 589 590 /* If GCC knows the exact uint_least16_t and uint_least32_t types from 591 <stdint.h>, use them for char16_t and char32_t. Otherwise, use 592 these guesses; getting the wrong type of a given width will not 593 affect C++ name mangling because in C++ these are distinct types 594 not typedefs. */ 595 596 #ifndef CHAR8_TYPE 597 #define CHAR8_TYPE "unsigned char" 598 #endif 599 600 #ifdef UINT_LEAST16_TYPE 601 #define CHAR16_TYPE UINT_LEAST16_TYPE 602 #else 603 #define CHAR16_TYPE "short unsigned int" 604 #endif 605 606 #ifdef UINT_LEAST32_TYPE 607 #define CHAR32_TYPE UINT_LEAST32_TYPE 608 #else 609 #define CHAR32_TYPE "unsigned int" 610 #endif 611 612 #ifndef WCHAR_TYPE 613 #define WCHAR_TYPE "int" 614 #endif 615 616 /* WCHAR_TYPE gets overridden by -fshort-wchar. */ 617 #define MODIFIED_WCHAR_TYPE \ 618 (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE) 619 620 #ifndef PTRDIFF_TYPE 621 #define PTRDIFF_TYPE "long int" 622 #endif 623 624 #ifndef WINT_TYPE 625 #define WINT_TYPE "unsigned int" 626 #endif 627 628 #ifndef INTMAX_TYPE 629 #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \ 630 ? "int" \ 631 : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \ 632 ? "long int" \ 633 : "long long int")) 634 #endif 635 636 #ifndef UINTMAX_TYPE 637 #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \ 638 ? "unsigned int" \ 639 : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \ 640 ? "long unsigned int" \ 641 : "long long unsigned int")) 642 #endif 643 644 645 /* There are no default definitions of these <stdint.h> types. */ 646 647 #ifndef SIG_ATOMIC_TYPE 648 #define SIG_ATOMIC_TYPE ((const char *) NULL) 649 #endif 650 651 #ifndef INT8_TYPE 652 #define INT8_TYPE ((const char *) NULL) 653 #endif 654 655 #ifndef INT16_TYPE 656 #define INT16_TYPE ((const char *) NULL) 657 #endif 658 659 #ifndef INT32_TYPE 660 #define INT32_TYPE ((const char *) NULL) 661 #endif 662 663 #ifndef INT64_TYPE 664 #define INT64_TYPE ((const char *) NULL) 665 #endif 666 667 #ifndef UINT8_TYPE 668 #define UINT8_TYPE ((const char *) NULL) 669 #endif 670 671 #ifndef UINT16_TYPE 672 #define UINT16_TYPE ((const char *) NULL) 673 #endif 674 675 #ifndef UINT32_TYPE 676 #define UINT32_TYPE ((const char *) NULL) 677 #endif 678 679 #ifndef UINT64_TYPE 680 #define UINT64_TYPE ((const char *) NULL) 681 #endif 682 683 #ifndef INT_LEAST8_TYPE 684 #define INT_LEAST8_TYPE ((const char *) NULL) 685 #endif 686 687 #ifndef INT_LEAST16_TYPE 688 #define INT_LEAST16_TYPE ((const char *) NULL) 689 #endif 690 691 #ifndef INT_LEAST32_TYPE 692 #define INT_LEAST32_TYPE ((const char *) NULL) 693 #endif 694 695 #ifndef INT_LEAST64_TYPE 696 #define INT_LEAST64_TYPE ((const char *) NULL) 697 #endif 698 699 #ifndef UINT_LEAST8_TYPE 700 #define UINT_LEAST8_TYPE ((const char *) NULL) 701 #endif 702 703 #ifndef UINT_LEAST16_TYPE 704 #define UINT_LEAST16_TYPE ((const char *) NULL) 705 #endif 706 707 #ifndef UINT_LEAST32_TYPE 708 #define UINT_LEAST32_TYPE ((const char *) NULL) 709 #endif 710 711 #ifndef UINT_LEAST64_TYPE 712 #define UINT_LEAST64_TYPE ((const char *) NULL) 713 #endif 714 715 #ifndef INT_FAST8_TYPE 716 #define INT_FAST8_TYPE ((const char *) NULL) 717 #endif 718 719 #ifndef INT_FAST16_TYPE 720 #define INT_FAST16_TYPE ((const char *) NULL) 721 #endif 722 723 #ifndef INT_FAST32_TYPE 724 #define INT_FAST32_TYPE ((const char *) NULL) 725 #endif 726 727 #ifndef INT_FAST64_TYPE 728 #define INT_FAST64_TYPE ((const char *) NULL) 729 #endif 730 731 #ifndef UINT_FAST8_TYPE 732 #define UINT_FAST8_TYPE ((const char *) NULL) 733 #endif 734 735 #ifndef UINT_FAST16_TYPE 736 #define UINT_FAST16_TYPE ((const char *) NULL) 737 #endif 738 739 #ifndef UINT_FAST32_TYPE 740 #define UINT_FAST32_TYPE ((const char *) NULL) 741 #endif 742 743 #ifndef UINT_FAST64_TYPE 744 #define UINT_FAST64_TYPE ((const char *) NULL) 745 #endif 746 747 #ifndef INTPTR_TYPE 748 #define INTPTR_TYPE ((const char *) NULL) 749 #endif 750 751 #ifndef UINTPTR_TYPE 752 #define UINTPTR_TYPE ((const char *) NULL) 753 #endif 754 755 /* Width in bits of a pointer. Mind the value of the macro `Pmode'. */ 756 #ifndef POINTER_SIZE 757 #define POINTER_SIZE BITS_PER_WORD 758 #endif 759 #ifndef POINTER_SIZE_UNITS 760 #define POINTER_SIZE_UNITS ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT) 761 #endif 762 763 764 #ifndef PIC_OFFSET_TABLE_REGNUM 765 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM 766 #endif 767 768 #ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 769 #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 0 770 #endif 771 772 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES 773 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0 774 #endif 775 776 #ifndef TARGET_DECLSPEC 777 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES 778 /* If the target supports the "dllimport" attribute, users are 779 probably used to the "__declspec" syntax. */ 780 #define TARGET_DECLSPEC 1 781 #else 782 #define TARGET_DECLSPEC 0 783 #endif 784 #endif 785 786 /* By default, the preprocessor should be invoked the same way in C++ 787 as in C. */ 788 #ifndef CPLUSPLUS_CPP_SPEC 789 #ifdef CPP_SPEC 790 #define CPLUSPLUS_CPP_SPEC CPP_SPEC 791 #endif 792 #endif 793 794 #ifndef ACCUMULATE_OUTGOING_ARGS 795 #define ACCUMULATE_OUTGOING_ARGS 0 796 #endif 797 798 /* By default, use the GNU runtime for Objective C. */ 799 #ifndef NEXT_OBJC_RUNTIME 800 #define NEXT_OBJC_RUNTIME 0 801 #endif 802 803 /* Decide whether a function's arguments should be processed 804 from first to last or from last to first. 805 806 They should if the stack and args grow in opposite directions, but 807 only if we have push insns. */ 808 809 #ifdef PUSH_ROUNDING 810 811 #ifndef PUSH_ARGS_REVERSED 812 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD) 813 #define PUSH_ARGS_REVERSED targetm.calls.push_argument (0) 814 #endif 815 #endif 816 817 #endif 818 819 #ifndef PUSH_ARGS_REVERSED 820 #define PUSH_ARGS_REVERSED 0 821 #endif 822 823 /* Default value for the alignment (in bits) a C conformant malloc has to 824 provide. This default is intended to be safe and always correct. */ 825 #ifndef MALLOC_ABI_ALIGNMENT 826 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD 827 #endif 828 829 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY. 830 STACK_BOUNDARY is required. */ 831 #ifndef PREFERRED_STACK_BOUNDARY 832 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY 833 #endif 834 835 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not 836 defined. */ 837 #ifndef INCOMING_STACK_BOUNDARY 838 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY 839 #endif 840 841 #ifndef TARGET_DEFAULT_PACK_STRUCT 842 #define TARGET_DEFAULT_PACK_STRUCT 0 843 #endif 844 845 /* By default, the vtable entries are void pointers, the so the alignment 846 is the same as pointer alignment. The value of this macro specifies 847 the alignment of the vtable entry in bits. It should be defined only 848 when special alignment is necessary. */ 849 #ifndef TARGET_VTABLE_ENTRY_ALIGN 850 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE 851 #endif 852 853 /* There are a few non-descriptor entries in the vtable at offsets below 854 zero. If these entries must be padded (say, to preserve the alignment 855 specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of 856 words in each data entry. */ 857 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE 858 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1 859 #endif 860 861 /* Decide whether it is safe to use a local alias for a virtual function 862 when constructing thunks. */ 863 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P 864 #ifdef ASM_OUTPUT_DEF 865 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1 866 #else 867 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0 868 #endif 869 #endif 870 871 /* Decide whether target supports aliases. */ 872 #ifndef TARGET_SUPPORTS_ALIASES 873 #ifdef ASM_OUTPUT_DEF 874 #define TARGET_SUPPORTS_ALIASES 1 875 #else 876 #define TARGET_SUPPORTS_ALIASES 0 877 #endif 878 #endif 879 880 /* Select a format to encode pointers in exception handling data. We 881 prefer those that result in fewer dynamic relocations. Assume no 882 special support here and encode direct references. */ 883 #ifndef ASM_PREFERRED_EH_DATA_FORMAT 884 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) DW_EH_PE_absptr 885 #endif 886 887 /* By default, the C++ compiler will use the lowest bit of the pointer 888 to function to indicate a pointer-to-member-function points to a 889 virtual member function. However, if FUNCTION_BOUNDARY indicates 890 function addresses aren't always even, the lowest bit of the delta 891 field will be used. */ 892 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION 893 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \ 894 (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \ 895 ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta) 896 #endif 897 898 #ifndef DEFAULT_GDB_EXTENSIONS 899 #define DEFAULT_GDB_EXTENSIONS 1 900 #endif 901 902 /* Default to DWARF2_DEBUGGING_INFO. Legacy targets can choose different 903 by defining PREFERRED_DEBUGGING_TYPE. */ 904 #ifndef PREFERRED_DEBUGGING_TYPE 905 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_LINENO_DEBUGGING_INFO 906 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG 907 #else 908 #error You must define PREFERRED_DEBUGGING_TYPE if DWARF is not supported 909 #endif 910 #endif 911 912 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL 913 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false 914 #endif 915 916 /* True if the targets integer-comparison functions return { 0, 1, 2 917 } to indicate { <, ==, > }. False if { -1, 0, 1 } is used 918 instead. The libgcc routines are biased. */ 919 #ifndef TARGET_LIB_INT_CMP_BIASED 920 #define TARGET_LIB_INT_CMP_BIASED (true) 921 #endif 922 923 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files, 924 then the word-endianness is the same as for integers. */ 925 #ifndef FLOAT_WORDS_BIG_ENDIAN 926 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN 927 #endif 928 929 #ifndef REG_WORDS_BIG_ENDIAN 930 #define REG_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN 931 #endif 932 933 934 #ifndef TARGET_DEC_EVAL_METHOD 935 #define TARGET_DEC_EVAL_METHOD 2 936 #endif 937 938 #ifndef HAS_LONG_COND_BRANCH 939 #define HAS_LONG_COND_BRANCH 0 940 #endif 941 942 #ifndef HAS_LONG_UNCOND_BRANCH 943 #define HAS_LONG_UNCOND_BRANCH 0 944 #endif 945 946 /* Determine whether __cxa_atexit, rather than atexit, is used to 947 register C++ destructors for local statics and global objects. */ 948 #ifndef DEFAULT_USE_CXA_ATEXIT 949 #define DEFAULT_USE_CXA_ATEXIT 0 950 #endif 951 952 #if GCC_VERSION >= 3000 && defined IN_GCC 953 /* These old constraint macros shouldn't appear anywhere in a 954 configuration using MD constraint definitions. */ 955 #endif 956 957 /* Determin whether the target runtime library is Bionic */ 958 #ifndef TARGET_HAS_BIONIC 959 #define TARGET_HAS_BIONIC 0 960 #endif 961 962 /* Indicate that CLZ and CTZ are undefined at zero. */ 963 #ifndef CLZ_DEFINED_VALUE_AT_ZERO 964 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0 965 #endif 966 #ifndef CTZ_DEFINED_VALUE_AT_ZERO 967 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0 968 #endif 969 970 /* Provide a default value for STORE_FLAG_VALUE. */ 971 #ifndef STORE_FLAG_VALUE 972 #define STORE_FLAG_VALUE 1 973 #endif 974 975 /* This macro is used to determine what the largest unit size that 976 move_by_pieces can use is. */ 977 978 /* MOVE_MAX_PIECES is the number of bytes at a time which we can 979 move efficiently, as opposed to MOVE_MAX which is the maximum 980 number of bytes we can move with a single instruction. */ 981 982 #ifndef MOVE_MAX_PIECES 983 #define MOVE_MAX_PIECES MOVE_MAX 984 #endif 985 986 /* STORE_MAX_PIECES is the number of bytes at a time that we can 987 store efficiently. Due to internal GCC limitations, this is 988 MOVE_MAX_PIECES limited by the number of bytes GCC can represent 989 for an immediate constant. */ 990 991 #ifndef STORE_MAX_PIECES 992 #define STORE_MAX_PIECES MIN (MOVE_MAX_PIECES, 2 * sizeof (HOST_WIDE_INT)) 993 #endif 994 995 /* Likewise for block comparisons. */ 996 #ifndef COMPARE_MAX_PIECES 997 #define COMPARE_MAX_PIECES MOVE_MAX_PIECES 998 #endif 999 1000 #ifndef MAX_MOVE_MAX 1001 #define MAX_MOVE_MAX MOVE_MAX 1002 #endif 1003 1004 #ifndef MIN_UNITS_PER_WORD 1005 #define MIN_UNITS_PER_WORD UNITS_PER_WORD 1006 #endif 1007 1008 #ifndef MAX_BITS_PER_WORD 1009 #define MAX_BITS_PER_WORD BITS_PER_WORD 1010 #endif 1011 1012 #ifndef STACK_POINTER_OFFSET 1013 #define STACK_POINTER_OFFSET 0 1014 #endif 1015 1016 #ifndef LOCAL_REGNO 1017 #define LOCAL_REGNO(REGNO) 0 1018 #endif 1019 1020 #ifndef HONOR_REG_ALLOC_ORDER 1021 #define HONOR_REG_ALLOC_ORDER 0 1022 #endif 1023 1024 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, 1025 the stack pointer does not matter. The value is tested only in 1026 functions that have frame pointers. */ 1027 #ifndef EXIT_IGNORE_STACK 1028 #define EXIT_IGNORE_STACK 0 1029 #endif 1030 1031 /* Assume that case vectors are not pc-relative. */ 1032 #ifndef CASE_VECTOR_PC_RELATIVE 1033 #define CASE_VECTOR_PC_RELATIVE 0 1034 #endif 1035 1036 /* Force minimum alignment to be able to use the least significant bits 1037 for distinguishing descriptor addresses from code addresses. */ 1038 #define FUNCTION_ALIGNMENT(ALIGN) \ 1039 (lang_hooks.custom_function_descriptors \ 1040 && targetm.calls.custom_function_descriptors > 0 \ 1041 ? MAX ((ALIGN), \ 1042 2 * targetm.calls.custom_function_descriptors * BITS_PER_UNIT)\ 1043 : (ALIGN)) 1044 1045 /* Assume that trampolines need function alignment. */ 1046 #ifndef TRAMPOLINE_ALIGNMENT 1047 #define TRAMPOLINE_ALIGNMENT FUNCTION_ALIGNMENT (FUNCTION_BOUNDARY) 1048 #endif 1049 1050 /* Register mappings for target machines without register windows. */ 1051 #ifndef INCOMING_REGNO 1052 #define INCOMING_REGNO(N) (N) 1053 #endif 1054 1055 #ifndef OUTGOING_REGNO 1056 #define OUTGOING_REGNO(N) (N) 1057 #endif 1058 1059 #ifndef SHIFT_COUNT_TRUNCATED 1060 #define SHIFT_COUNT_TRUNCATED 0 1061 #endif 1062 1063 #ifndef LEGITIMATE_PIC_OPERAND_P 1064 #define LEGITIMATE_PIC_OPERAND_P(X) 1 1065 #endif 1066 1067 #ifndef TARGET_MEM_CONSTRAINT 1068 #define TARGET_MEM_CONSTRAINT 'm' 1069 #endif 1070 1071 #ifndef REVERSIBLE_CC_MODE 1072 #define REVERSIBLE_CC_MODE(MODE) 0 1073 #endif 1074 1075 /* Biggest alignment supported by the object file format of this machine. */ 1076 #ifndef MAX_OFILE_ALIGNMENT 1077 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT 1078 #endif 1079 1080 #ifndef FRAME_GROWS_DOWNWARD 1081 #define FRAME_GROWS_DOWNWARD 0 1082 #endif 1083 1084 #ifndef RETURN_ADDR_IN_PREVIOUS_FRAME 1085 #define RETURN_ADDR_IN_PREVIOUS_FRAME 0 1086 #endif 1087 1088 /* On most machines, the CFA coincides with the first incoming parm. */ 1089 #ifndef ARG_POINTER_CFA_OFFSET 1090 #define ARG_POINTER_CFA_OFFSET(FNDECL) \ 1091 (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size) 1092 #endif 1093 1094 /* On most machines, we use the CFA as DW_AT_frame_base. */ 1095 #ifndef CFA_FRAME_BASE_OFFSET 1096 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0 1097 #endif 1098 1099 /* The offset from the incoming value of %sp to the top of the stack frame 1100 for the current function. */ 1101 #ifndef INCOMING_FRAME_SP_OFFSET 1102 #define INCOMING_FRAME_SP_OFFSET 0 1103 #endif 1104 1105 #ifndef HARD_REGNO_NREGS_HAS_PADDING 1106 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0 1107 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1 1108 #endif 1109 1110 #ifndef OUTGOING_REG_PARM_STACK_SPACE 1111 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0 1112 #endif 1113 1114 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by 1115 the backend. MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best 1116 effort stack alignment supported by the backend. If the backend 1117 supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and 1118 MAX_STACK_ALIGNMENT are the same. Otherwise, the incoming stack 1119 boundary will limit the maximum guaranteed stack alignment. */ 1120 #ifdef MAX_STACK_ALIGNMENT 1121 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT 1122 #else 1123 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY 1124 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY 1125 #endif 1126 1127 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY) 1128 1129 #ifndef LOCAL_ALIGNMENT 1130 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT 1131 #endif 1132 1133 #ifndef STACK_SLOT_ALIGNMENT 1134 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \ 1135 ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN)) 1136 #endif 1137 1138 #ifndef LOCAL_DECL_ALIGNMENT 1139 #define LOCAL_DECL_ALIGNMENT(DECL) \ 1140 LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL)) 1141 #endif 1142 1143 #ifndef MINIMUM_ALIGNMENT 1144 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN) 1145 #endif 1146 1147 /* Alignment value for attribute ((aligned)). */ 1148 #ifndef ATTRIBUTE_ALIGNED_VALUE 1149 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT 1150 #endif 1151 1152 /* For most ports anything that evaluates to a constant symbolic 1153 or integer value is acceptable as a constant address. */ 1154 #ifndef CONSTANT_ADDRESS_P 1155 #define CONSTANT_ADDRESS_P(X) (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE) 1156 #endif 1157 1158 #ifndef MAX_FIXED_MODE_SIZE 1159 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode) 1160 #endif 1161 1162 /* Nonzero if structures and unions should be returned in memory. 1163 1164 This should only be defined if compatibility with another compiler or 1165 with an ABI is needed, because it results in slower code. */ 1166 1167 #ifndef DEFAULT_PCC_STRUCT_RETURN 1168 #define DEFAULT_PCC_STRUCT_RETURN 1 1169 #endif 1170 1171 #ifndef PCC_BITFIELD_TYPE_MATTERS 1172 #define PCC_BITFIELD_TYPE_MATTERS false 1173 #endif 1174 1175 #ifndef INSN_SETS_ARE_DELAYED 1176 #define INSN_SETS_ARE_DELAYED(INSN) false 1177 #endif 1178 1179 #ifndef INSN_REFERENCES_ARE_DELAYED 1180 #define INSN_REFERENCES_ARE_DELAYED(INSN) false 1181 #endif 1182 1183 #ifndef NO_FUNCTION_CSE 1184 #define NO_FUNCTION_CSE false 1185 #endif 1186 1187 #ifndef HARD_REGNO_RENAME_OK 1188 #define HARD_REGNO_RENAME_OK(FROM, TO) true 1189 #endif 1190 1191 #ifndef EPILOGUE_USES 1192 #define EPILOGUE_USES(REG) false 1193 #endif 1194 1195 #ifndef ARGS_GROW_DOWNWARD 1196 #define ARGS_GROW_DOWNWARD 0 1197 #endif 1198 1199 #ifndef STACK_GROWS_DOWNWARD 1200 #define STACK_GROWS_DOWNWARD 0 1201 #endif 1202 1203 #ifndef STACK_PUSH_CODE 1204 #if STACK_GROWS_DOWNWARD 1205 #define STACK_PUSH_CODE PRE_DEC 1206 #else 1207 #define STACK_PUSH_CODE PRE_INC 1208 #endif 1209 #endif 1210 1211 /* Default value for flag_pie when flag_pie is initialized to -1: 1212 --enable-default-pie: Default flag_pie to -fPIE. 1213 --disable-default-pie: Default flag_pie to 0. 1214 */ 1215 #ifdef ENABLE_DEFAULT_PIE 1216 # ifndef DEFAULT_FLAG_PIE 1217 # define DEFAULT_FLAG_PIE 2 1218 # endif 1219 #else 1220 # define DEFAULT_FLAG_PIE 0 1221 #endif 1222 1223 #ifndef SWITCHABLE_TARGET 1224 #define SWITCHABLE_TARGET 0 1225 #endif 1226 1227 /* If the target supports integers that are wider than two 1228 HOST_WIDE_INTs on the host compiler, then the target should define 1229 TARGET_SUPPORTS_WIDE_INT and make the appropriate fixups. 1230 Otherwise the compiler really is not robust. */ 1231 #ifndef TARGET_SUPPORTS_WIDE_INT 1232 #define TARGET_SUPPORTS_WIDE_INT 0 1233 #endif 1234 1235 #ifndef SHORT_IMMEDIATES_SIGN_EXTEND 1236 #define SHORT_IMMEDIATES_SIGN_EXTEND 0 1237 #endif 1238 1239 #ifndef WORD_REGISTER_OPERATIONS 1240 #define WORD_REGISTER_OPERATIONS 0 1241 #endif 1242 1243 #ifndef LOAD_EXTEND_OP 1244 #define LOAD_EXTEND_OP(M) UNKNOWN 1245 #endif 1246 1247 #ifndef INITIAL_FRAME_ADDRESS_RTX 1248 #define INITIAL_FRAME_ADDRESS_RTX NULL 1249 #endif 1250 1251 #ifndef SETUP_FRAME_ADDRESSES 1252 #define SETUP_FRAME_ADDRESSES() do { } while (0) 1253 #endif 1254 1255 #ifndef DYNAMIC_CHAIN_ADDRESS 1256 #define DYNAMIC_CHAIN_ADDRESS(x) (x) 1257 #endif 1258 1259 #ifndef FRAME_ADDR_RTX 1260 #define FRAME_ADDR_RTX(x) (x) 1261 #endif 1262 1263 #ifndef REVERSE_CONDITION 1264 #define REVERSE_CONDITION(code, mode) reverse_condition (code) 1265 #endif 1266 1267 #ifndef TARGET_PECOFF 1268 #define TARGET_PECOFF 0 1269 #endif 1270 1271 #ifndef TARGET_COFF 1272 #define TARGET_COFF 0 1273 #endif 1274 1275 #ifndef EH_RETURN_HANDLER_RTX 1276 #define EH_RETURN_HANDLER_RTX NULL 1277 #endif 1278 1279 #ifdef GCC_INSN_FLAGS_H 1280 /* Dependent default target macro definitions 1281 1282 This section of defaults.h defines target macros that depend on generated 1283 headers. This is a bit awkward: We want to put all default definitions 1284 for target macros in defaults.h, but some of the defaults depend on the 1285 HAVE_* flags defines of insn-flags.h. But insn-flags.h is not always 1286 included by files that do include defaults.h. 1287 1288 Fortunately, the default macro definitions that depend on the HAVE_* 1289 macros are also the ones that will only be used inside GCC itself, i.e. 1290 not in the gen* programs or in target objects like libgcc. 1291 1292 Obviously, it would be best to keep this section of defaults.h as small 1293 as possible, by converting the macros defined below to target hooks or 1294 functions. 1295 */ 1296 1297 /* The default branch cost is 1. */ 1298 #ifndef BRANCH_COST 1299 #define BRANCH_COST(speed_p, predictable_p) 1 1300 #endif 1301 1302 /* If a memory-to-memory move would take MOVE_RATIO or more simple 1303 move-instruction sequences, we will do a cpymem or libcall instead. */ 1304 1305 #ifndef MOVE_RATIO 1306 #if defined (HAVE_cpymemqi) || defined (HAVE_cpymemhi) || defined (HAVE_cpymemsi) || defined (HAVE_cpymemdi) || defined (HAVE_cpymemti) 1307 #define MOVE_RATIO(speed) 2 1308 #else 1309 /* If we are optimizing for space (-Os), cut down the default move ratio. */ 1310 #define MOVE_RATIO(speed) ((speed) ? 15 : 3) 1311 #endif 1312 #endif 1313 1314 /* If a clear memory operation would take CLEAR_RATIO or more simple 1315 move-instruction sequences, we will do a setmem or libcall instead. */ 1316 1317 #ifndef CLEAR_RATIO 1318 #if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti) 1319 #define CLEAR_RATIO(speed) 2 1320 #else 1321 /* If we are optimizing for space, cut down the default clear ratio. */ 1322 #define CLEAR_RATIO(speed) ((speed) ? 15 :3) 1323 #endif 1324 #endif 1325 1326 /* If a memory set (to value other than zero) operation would take 1327 SET_RATIO or more simple move-instruction sequences, we will do a setmem 1328 or libcall instead. */ 1329 #ifndef SET_RATIO 1330 #define SET_RATIO(speed) MOVE_RATIO (speed) 1331 #endif 1332 1333 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save. 1334 Normally move_insn, so Pmode stack pointer. */ 1335 1336 #ifndef STACK_SAVEAREA_MODE 1337 #define STACK_SAVEAREA_MODE(LEVEL) Pmode 1338 #endif 1339 1340 /* Supply a default definition of STACK_SIZE_MODE for 1341 allocate_dynamic_stack_space. Normally PLUS/MINUS, so word_mode. */ 1342 1343 #ifndef STACK_SIZE_MODE 1344 #define STACK_SIZE_MODE word_mode 1345 #endif 1346 1347 /* Default value for flag_stack_protect when flag_stack_protect is initialized to -1: 1348 --enable-default-ssp: Default flag_stack_protect to -fstack-protector-strong. 1349 --disable-default-ssp: Default flag_stack_protect to 0. 1350 */ 1351 #ifdef ENABLE_DEFAULT_SSP 1352 # ifndef DEFAULT_FLAG_SSP 1353 # define DEFAULT_FLAG_SSP 3 1354 # endif 1355 #else 1356 # define DEFAULT_FLAG_SSP 0 1357 #endif 1358 1359 /* Provide default values for the macros controlling stack checking. */ 1360 1361 /* The default is neither full builtin stack checking... */ 1362 #ifndef STACK_CHECK_BUILTIN 1363 #define STACK_CHECK_BUILTIN 0 1364 #endif 1365 1366 /* ...nor static builtin stack checking. */ 1367 #ifndef STACK_CHECK_STATIC_BUILTIN 1368 #define STACK_CHECK_STATIC_BUILTIN 0 1369 #endif 1370 1371 /* The default interval is one page (4096 bytes). */ 1372 #ifndef STACK_CHECK_PROBE_INTERVAL_EXP 1373 #define STACK_CHECK_PROBE_INTERVAL_EXP 12 1374 #endif 1375 1376 /* The default is not to move the stack pointer. */ 1377 #ifndef STACK_CHECK_MOVING_SP 1378 #define STACK_CHECK_MOVING_SP 0 1379 #endif 1380 1381 /* This is a kludge to try to capture the discrepancy between the old 1382 mechanism (generic stack checking) and the new mechanism (static 1383 builtin stack checking). STACK_CHECK_PROTECT needs to be bumped 1384 for the latter because part of the protection area is effectively 1385 included in STACK_CHECK_MAX_FRAME_SIZE for the former. */ 1386 #ifdef STACK_CHECK_PROTECT 1387 #define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT 1388 #else 1389 #define STACK_OLD_CHECK_PROTECT \ 1390 (!global_options.x_flag_exceptions \ 1391 ? 75 * UNITS_PER_WORD \ 1392 : targetm_common.except_unwind_info (&global_options) == UI_SJLJ \ 1393 ? 4 * 1024 \ 1394 : 8 * 1024) 1395 #endif 1396 1397 /* Minimum amount of stack required to recover from an anticipated stack 1398 overflow detection. The default value conveys an estimate of the amount 1399 of stack required to propagate an exception. */ 1400 #ifndef STACK_CHECK_PROTECT 1401 #define STACK_CHECK_PROTECT \ 1402 (!global_options.x_flag_exceptions \ 1403 ? 4 * 1024 \ 1404 : targetm_common.except_unwind_info (&global_options) == UI_SJLJ \ 1405 ? 8 * 1024 \ 1406 : 12 * 1024) 1407 #endif 1408 1409 /* Make the maximum frame size be the largest we can and still only need 1410 one probe per function. */ 1411 #ifndef STACK_CHECK_MAX_FRAME_SIZE 1412 #define STACK_CHECK_MAX_FRAME_SIZE \ 1413 ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD) 1414 #endif 1415 1416 /* This is arbitrary, but should be large enough everywhere. */ 1417 #ifndef STACK_CHECK_FIXED_FRAME_SIZE 1418 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD) 1419 #endif 1420 1421 /* Provide a reasonable default for the maximum size of an object to 1422 allocate in the fixed frame. We may need to be able to make this 1423 controllable by the user at some point. */ 1424 #ifndef STACK_CHECK_MAX_VAR_SIZE 1425 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100) 1426 #endif 1427 1428 /* By default, the C++ compiler will use function addresses in the 1429 vtable entries. Setting this nonzero tells the compiler to use 1430 function descriptors instead. The value of this macro says how 1431 many words wide the descriptor is (normally 2). It is assumed 1432 that the address of a function descriptor may be treated as a 1433 pointer to a function. */ 1434 #ifndef TARGET_VTABLE_USES_DESCRIPTORS 1435 #define TARGET_VTABLE_USES_DESCRIPTORS 0 1436 #endif 1437 1438 #endif /* GCC_INSN_FLAGS_H */ 1439 1440 #ifndef DWARF_GNAT_ENCODINGS_DEFAULT 1441 #define DWARF_GNAT_ENCODINGS_DEFAULT DWARF_GNAT_ENCODINGS_GDB 1442 #endif 1443 1444 #ifndef USED_FOR_TARGET 1445 /* Done this way to keep gengtype happy. */ 1446 #if BITS_PER_UNIT == 8 1447 #define TARGET_UNIT uint8_t 1448 #elif BITS_PER_UNIT == 16 1449 #define TARGET_UNIT uint16_t 1450 #elif BITS_PER_UNIT == 32 1451 #define TARGET_UNIT uint32_t 1452 #else 1453 #error Unknown BITS_PER_UNIT 1454 #endif 1455 typedef TARGET_UNIT target_unit; 1456 #endif 1457 1458 #endif /* ! GCC_DEFAULTS_H */ 1459