1/* Definitions of various defaults for tm.h macros. 2 Copyright (C) 1992-2015 Free Software Foundation, Inc. 3 Contributed by Ron Guilmette (rfg@monkeys.com) 4 5This file is part of GCC. 6 7GCC is free software; you can redistribute it and/or modify it under 8the terms of the GNU General Public License as published by the Free 9Software Foundation; either version 3, or (at your option) any later 10version. 11 12GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13WARRANTY; without even the implied warranty of MERCHANTABILITY or 14FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15for more details. 16 17Under Section 7 of GPL version 3, you are granted additional 18permissions described in the GCC Runtime Library Exception, version 193.1, as published by the Free Software Foundation. 20 21You should have received a copy of the GNU General Public License and 22a copy of the GCC Runtime Library Exception along with this program; 23see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24<http://www.gnu.org/licenses/>. */ 25 26#ifndef GCC_DEFAULTS_H 27#define GCC_DEFAULTS_H 28 29/* How to start an assembler comment. */ 30#ifndef ASM_COMMENT_START 31#define ASM_COMMENT_START ";#" 32#endif 33 34/* Store in OUTPUT a string (made with alloca) containing an 35 assembler-name for a local static variable or function named NAME. 36 LABELNO is an integer which is different for each call. */ 37 38#ifndef ASM_PN_FORMAT 39# ifndef NO_DOT_IN_LABEL 40# define ASM_PN_FORMAT "%s.%lu" 41# else 42# ifndef NO_DOLLAR_IN_LABEL 43# define ASM_PN_FORMAT "%s$%lu" 44# else 45# define ASM_PN_FORMAT "__%s_%lu" 46# endif 47# endif 48#endif /* ! ASM_PN_FORMAT */ 49 50#ifndef ASM_FORMAT_PRIVATE_NAME 51# define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \ 52 do { const char *const name_ = (NAME); \ 53 char *const output_ = (OUTPUT) = \ 54 (char *) alloca (strlen (name_) + 32); \ 55 sprintf (output_, ASM_PN_FORMAT, name_, (unsigned long)(LABELNO)); \ 56 } while (0) 57#endif 58 59/* Choose a reasonable default for ASM_OUTPUT_ASCII. */ 60 61#ifndef ASM_OUTPUT_ASCII 62#define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \ 63 do { \ 64 FILE *_hide_asm_out_file = (MYFILE); \ 65 const unsigned char *_hide_p = (const unsigned char *) (MYSTRING); \ 66 int _hide_thissize = (MYLENGTH); \ 67 { \ 68 FILE *asm_out_file = _hide_asm_out_file; \ 69 const unsigned char *p = _hide_p; \ 70 int thissize = _hide_thissize; \ 71 int i; \ 72 fprintf (asm_out_file, "\t.ascii \""); \ 73 \ 74 for (i = 0; i < thissize; i++) \ 75 { \ 76 int c = p[i]; \ 77 if (c == '\"' || c == '\\') \ 78 putc ('\\', asm_out_file); \ 79 if (ISPRINT (c)) \ 80 putc (c, asm_out_file); \ 81 else \ 82 { \ 83 fprintf (asm_out_file, "\\%o", c); \ 84 /* After an octal-escape, if a digit follows, \ 85 terminate one string constant and start another. \ 86 The VAX assembler fails to stop reading the escape \ 87 after three digits, so this is the only way we \ 88 can get it to parse the data properly. */ \ 89 if (i < thissize - 1 && ISDIGIT (p[i + 1])) \ 90 fprintf (asm_out_file, "\"\n\t.ascii \""); \ 91 } \ 92 } \ 93 fprintf (asm_out_file, "\"\n"); \ 94 } \ 95 } \ 96 while (0) 97#endif 98 99/* This is how we tell the assembler to equate two values. */ 100#ifdef SET_ASM_OP 101#ifndef ASM_OUTPUT_DEF 102#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \ 103 do { fprintf ((FILE), "%s", SET_ASM_OP); \ 104 assemble_name (FILE, LABEL1); \ 105 fprintf (FILE, ","); \ 106 assemble_name (FILE, LABEL2); \ 107 fprintf (FILE, "\n"); \ 108 } while (0) 109#endif 110#endif 111 112#ifndef IFUNC_ASM_TYPE 113#define IFUNC_ASM_TYPE "gnu_indirect_function" 114#endif 115 116#ifndef TLS_COMMON_ASM_OP 117#define TLS_COMMON_ASM_OP ".tls_common" 118#endif 119 120#if defined (HAVE_AS_TLS) && !defined (ASM_OUTPUT_TLS_COMMON) 121#define ASM_OUTPUT_TLS_COMMON(FILE, DECL, NAME, SIZE) \ 122 do \ 123 { \ 124 fprintf ((FILE), "\t%s\t", TLS_COMMON_ASM_OP); \ 125 assemble_name ((FILE), (NAME)); \ 126 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", \ 127 (SIZE), DECL_ALIGN (DECL) / BITS_PER_UNIT); \ 128 } \ 129 while (0) 130#endif 131 132/* Decide whether to defer emitting the assembler output for an equate 133 of two values. The default is to not defer output. */ 134#ifndef TARGET_DEFERRED_OUTPUT_DEFS 135#define TARGET_DEFERRED_OUTPUT_DEFS(DECL,TARGET) false 136#endif 137 138/* This is how to output the definition of a user-level label named 139 NAME, such as the label on variable NAME. */ 140 141#ifndef ASM_OUTPUT_LABEL 142#define ASM_OUTPUT_LABEL(FILE,NAME) \ 143 do { \ 144 assemble_name ((FILE), (NAME)); \ 145 fputs (":\n", (FILE)); \ 146 } while (0) 147#endif 148 149/* This is how to output the definition of a user-level label named 150 NAME, such as the label on a function. */ 151 152#ifndef ASM_OUTPUT_FUNCTION_LABEL 153#define ASM_OUTPUT_FUNCTION_LABEL(FILE, NAME, DECL) \ 154 ASM_OUTPUT_LABEL ((FILE), (NAME)) 155#endif 156 157/* Output the definition of a compiler-generated label named NAME. */ 158#ifndef ASM_OUTPUT_INTERNAL_LABEL 159#define ASM_OUTPUT_INTERNAL_LABEL(FILE,NAME) \ 160 do { \ 161 assemble_name_raw ((FILE), (NAME)); \ 162 fputs (":\n", (FILE)); \ 163 } while (0) 164#endif 165 166/* This is how to output a reference to a user-level label named NAME. */ 167 168#ifndef ASM_OUTPUT_LABELREF 169#define ASM_OUTPUT_LABELREF(FILE,NAME) \ 170 do { \ 171 fputs (user_label_prefix, (FILE)); \ 172 fputs ((NAME), (FILE)); \ 173 } while (0); 174#endif 175 176/* Allow target to print debug info labels specially. This is useful for 177 VLIW targets, since debug info labels should go into the middle of 178 instruction bundles instead of breaking them. */ 179 180#ifndef ASM_OUTPUT_DEBUG_LABEL 181#define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \ 182 (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM) 183#endif 184 185/* This is how we tell the assembler that a symbol is weak. */ 186#ifndef ASM_OUTPUT_WEAK_ALIAS 187#if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF) 188#define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE) \ 189 do \ 190 { \ 191 ASM_WEAKEN_LABEL (STREAM, NAME); \ 192 if (VALUE) \ 193 ASM_OUTPUT_DEF (STREAM, NAME, VALUE); \ 194 } \ 195 while (0) 196#endif 197#endif 198 199/* This is how we tell the assembler that a symbol is a weak alias to 200 another symbol that doesn't require the other symbol to be defined. 201 Uses of the former will turn into weak uses of the latter, i.e., 202 uses that, in case the latter is undefined, will not cause errors, 203 and will add it to the symbol table as weak undefined. However, if 204 the latter is referenced directly, a strong reference prevails. */ 205#ifndef ASM_OUTPUT_WEAKREF 206#if defined HAVE_GAS_WEAKREF 207#define ASM_OUTPUT_WEAKREF(FILE, DECL, NAME, VALUE) \ 208 do \ 209 { \ 210 fprintf ((FILE), "\t.weakref\t"); \ 211 assemble_name ((FILE), (NAME)); \ 212 fprintf ((FILE), ","); \ 213 assemble_name ((FILE), (VALUE)); \ 214 fprintf ((FILE), "\n"); \ 215 } \ 216 while (0) 217#endif 218#endif 219 220/* How to emit a .type directive. */ 221#ifndef ASM_OUTPUT_TYPE_DIRECTIVE 222#if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT 223#define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE) \ 224 do \ 225 { \ 226 fputs (TYPE_ASM_OP, STREAM); \ 227 assemble_name (STREAM, NAME); \ 228 fputs (", ", STREAM); \ 229 fprintf (STREAM, TYPE_OPERAND_FMT, TYPE); \ 230 putc ('\n', STREAM); \ 231 } \ 232 while (0) 233#endif 234#endif 235 236/* How to emit a .size directive. */ 237#ifndef ASM_OUTPUT_SIZE_DIRECTIVE 238#ifdef SIZE_ASM_OP 239#define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE) \ 240 do \ 241 { \ 242 HOST_WIDE_INT size_ = (SIZE); \ 243 fputs (SIZE_ASM_OP, STREAM); \ 244 assemble_name (STREAM, NAME); \ 245 fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \ 246 } \ 247 while (0) 248 249#define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME) \ 250 do \ 251 { \ 252 fputs (SIZE_ASM_OP, STREAM); \ 253 assemble_name (STREAM, NAME); \ 254 fputs (", .-", STREAM); \ 255 assemble_name (STREAM, NAME); \ 256 putc ('\n', STREAM); \ 257 } \ 258 while (0) 259 260#endif 261#endif 262 263/* This determines whether or not we support weak symbols. SUPPORTS_WEAK 264 must be a preprocessor constant. */ 265#ifndef SUPPORTS_WEAK 266#if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL) 267#define SUPPORTS_WEAK 1 268#else 269#define SUPPORTS_WEAK 0 270#endif 271#endif 272 273/* This determines whether or not we support weak symbols during target 274 code generation. TARGET_SUPPORTS_WEAK can be any valid C expression. */ 275#ifndef TARGET_SUPPORTS_WEAK 276#define TARGET_SUPPORTS_WEAK (SUPPORTS_WEAK) 277#endif 278 279/* This determines whether or not we support the discriminator 280 attribute in the .loc directive. */ 281#ifndef SUPPORTS_DISCRIMINATOR 282#ifdef HAVE_GAS_DISCRIMINATOR 283#define SUPPORTS_DISCRIMINATOR 1 284#else 285#define SUPPORTS_DISCRIMINATOR 0 286#endif 287#endif 288 289/* This determines whether or not we support link-once semantics. */ 290#ifndef SUPPORTS_ONE_ONLY 291#ifdef MAKE_DECL_ONE_ONLY 292#define SUPPORTS_ONE_ONLY 1 293#else 294#define SUPPORTS_ONE_ONLY 0 295#endif 296#endif 297 298/* This determines whether weak symbols must be left out of a static 299 archive's table of contents. Defining this macro to be nonzero has 300 the consequence that certain symbols will not be made weak that 301 otherwise would be. The C++ ABI requires this macro to be zero; 302 see the documentation. */ 303#ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC 304#define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0 305#endif 306 307/* This determines whether or not we need linkonce unwind information. */ 308#ifndef TARGET_USES_WEAK_UNWIND_INFO 309#define TARGET_USES_WEAK_UNWIND_INFO 0 310#endif 311 312/* By default, there is no prefix on user-defined symbols. */ 313#ifndef USER_LABEL_PREFIX 314#define USER_LABEL_PREFIX "" 315#endif 316 317/* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to 318 provide a weak attribute. Else define it to nothing. 319 320 This would normally belong in ansidecl.h, but SUPPORTS_WEAK is 321 not available at that time. 322 323 Note, this is only for use by target files which we know are to be 324 compiled by GCC. */ 325#ifndef TARGET_ATTRIBUTE_WEAK 326# if SUPPORTS_WEAK 327# define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak)) 328# else 329# define TARGET_ATTRIBUTE_WEAK 330# endif 331#endif 332 333/* By default we can assume that all global symbols are in one namespace, 334 across all shared libraries. */ 335#ifndef MULTIPLE_SYMBOL_SPACES 336# define MULTIPLE_SYMBOL_SPACES 0 337#endif 338 339/* If the target supports init_priority C++ attribute, give 340 SUPPORTS_INIT_PRIORITY a nonzero value. */ 341#ifndef SUPPORTS_INIT_PRIORITY 342#define SUPPORTS_INIT_PRIORITY 1 343#endif /* SUPPORTS_INIT_PRIORITY */ 344 345/* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that 346 the rest of the DWARF 2 frame unwind support is also provided. */ 347#if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX) 348#define DWARF2_UNWIND_INFO 1 349#endif 350 351/* If we have named sections, and we're using crtstuff to run ctors, 352 use them for registering eh frame information. */ 353#if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \ 354 && !defined (EH_FRAME_IN_DATA_SECTION) 355#ifndef EH_FRAME_SECTION_NAME 356#define EH_FRAME_SECTION_NAME ".eh_frame" 357#endif 358#endif 359 360/* On many systems, different EH table encodings are used under 361 difference circumstances. Some will require runtime relocations; 362 some will not. For those that do not require runtime relocations, 363 we would like to make the table read-only. However, since the 364 read-only tables may need to be combined with read-write tables 365 that do require runtime relocation, it is not safe to make the 366 tables read-only unless the linker will merge read-only and 367 read-write sections into a single read-write section. If your 368 linker does not have this ability, but your system is such that no 369 encoding used with non-PIC code will ever require a runtime 370 relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in 371 your target configuration file. */ 372#ifndef EH_TABLES_CAN_BE_READ_ONLY 373#ifdef HAVE_LD_RO_RW_SECTION_MIXING 374#define EH_TABLES_CAN_BE_READ_ONLY 1 375#else 376#define EH_TABLES_CAN_BE_READ_ONLY 0 377#endif 378#endif 379 380/* If we have named section and we support weak symbols, then use the 381 .jcr section for recording java classes which need to be registered 382 at program start-up time. Can be overridden by defining 383 TARGET_NO_JCR_SECTION_NAME. */ 384#if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK \ 385 && !defined (TARGET_NO_JCR_SECTION_NAME) 386#ifndef JCR_SECTION_NAME 387#define JCR_SECTION_NAME ".jcr" 388#endif 389#endif 390 391/* This decision to use a .jcr section can be overridden by defining 392 USE_JCR_SECTION to 0 in target file. This is necessary if target 393 can define JCR_SECTION_NAME but does not have crtstuff or 394 linker support for .jcr section. */ 395#ifndef TARGET_USE_JCR_SECTION 396#ifdef JCR_SECTION_NAME 397#define TARGET_USE_JCR_SECTION 1 398#else 399#define TARGET_USE_JCR_SECTION 0 400#endif 401#endif 402 403/* Number of hardware registers that go into the DWARF-2 unwind info. 404 If not defined, equals FIRST_PSEUDO_REGISTER */ 405 406#ifndef DWARF_FRAME_REGISTERS 407#define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER 408#endif 409 410/* Offsets recorded in opcodes are a multiple of this alignment factor. */ 411#ifndef DWARF_CIE_DATA_ALIGNMENT 412#ifdef STACK_GROWS_DOWNWARD 413#define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD)) 414#else 415#define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD) 416#endif 417#endif 418 419/* The DWARF 2 CFA column which tracks the return address. Normally this 420 is the column for PC, or the first column after all of the hard 421 registers. */ 422#ifndef DWARF_FRAME_RETURN_COLUMN 423#ifdef PC_REGNUM 424#define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM) 425#else 426#define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGISTERS 427#endif 428#endif 429 430/* How to renumber registers for dbx and gdb. If not defined, assume 431 no renumbering is necessary. */ 432 433#ifndef DBX_REGISTER_NUMBER 434#define DBX_REGISTER_NUMBER(REGNO) (REGNO) 435#endif 436 437/* The mapping from gcc register number to DWARF 2 CFA column number. 438 By default, we just provide columns for all registers. */ 439#ifndef DWARF_FRAME_REGNUM 440#define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG) 441#endif 442 443/* The mapping from dwarf CFA reg number to internal dwarf reg numbers. */ 444#ifndef DWARF_REG_TO_UNWIND_COLUMN 445#define DWARF_REG_TO_UNWIND_COLUMN(REGNO) (REGNO) 446#endif 447 448/* Map register numbers held in the call frame info that gcc has 449 collected using DWARF_FRAME_REGNUM to those that should be output in 450 .debug_frame and .eh_frame. */ 451#ifndef DWARF2_FRAME_REG_OUT 452#define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) (REGNO) 453#endif 454 455/* The size of addresses as they appear in the Dwarf 2 data. 456 Some architectures use word addresses to refer to code locations, 457 but Dwarf 2 info always uses byte addresses. On such machines, 458 Dwarf 2 addresses need to be larger than the architecture's 459 pointers. */ 460#ifndef DWARF2_ADDR_SIZE 461#define DWARF2_ADDR_SIZE ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT) 462#endif 463 464/* The size in bytes of a DWARF field indicating an offset or length 465 relative to a debug info section, specified to be 4 bytes in the 466 DWARF-2 specification. The SGI/MIPS ABI defines it to be the same 467 as PTR_SIZE. */ 468#ifndef DWARF_OFFSET_SIZE 469#define DWARF_OFFSET_SIZE 4 470#endif 471 472/* The size in bytes of a DWARF 4 type signature. */ 473#ifndef DWARF_TYPE_SIGNATURE_SIZE 474#define DWARF_TYPE_SIGNATURE_SIZE 8 475#endif 476 477/* Default sizes for base C types. If the sizes are different for 478 your target, you should override these values by defining the 479 appropriate symbols in your tm.h file. */ 480 481#if BITS_PER_UNIT == 8 482#define LOG2_BITS_PER_UNIT 3 483#elif BITS_PER_UNIT == 16 484#define LOG2_BITS_PER_UNIT 4 485#else 486#error Unknown BITS_PER_UNIT 487#endif 488 489#ifndef BITS_PER_WORD 490#define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD) 491#endif 492 493#ifndef CHAR_TYPE_SIZE 494#define CHAR_TYPE_SIZE BITS_PER_UNIT 495#endif 496 497#ifndef BOOL_TYPE_SIZE 498/* `bool' has size and alignment `1', on almost all platforms. */ 499#define BOOL_TYPE_SIZE CHAR_TYPE_SIZE 500#endif 501 502#ifndef SHORT_TYPE_SIZE 503#define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2)) 504#endif 505 506#ifndef INT_TYPE_SIZE 507#define INT_TYPE_SIZE BITS_PER_WORD 508#endif 509 510#ifndef LONG_TYPE_SIZE 511#define LONG_TYPE_SIZE BITS_PER_WORD 512#endif 513 514#ifndef LONG_LONG_TYPE_SIZE 515#define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2) 516#endif 517 518#ifndef WCHAR_TYPE_SIZE 519#define WCHAR_TYPE_SIZE INT_TYPE_SIZE 520#endif 521 522#ifndef FLOAT_TYPE_SIZE 523#define FLOAT_TYPE_SIZE BITS_PER_WORD 524#endif 525 526#ifndef DOUBLE_TYPE_SIZE 527#define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2) 528#endif 529 530#ifndef LONG_DOUBLE_TYPE_SIZE 531#define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2) 532#endif 533 534#ifndef DECIMAL32_TYPE_SIZE 535#define DECIMAL32_TYPE_SIZE 32 536#endif 537 538#ifndef DECIMAL64_TYPE_SIZE 539#define DECIMAL64_TYPE_SIZE 64 540#endif 541 542#ifndef DECIMAL128_TYPE_SIZE 543#define DECIMAL128_TYPE_SIZE 128 544#endif 545 546#ifndef SHORT_FRACT_TYPE_SIZE 547#define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT 548#endif 549 550#ifndef FRACT_TYPE_SIZE 551#define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2) 552#endif 553 554#ifndef LONG_FRACT_TYPE_SIZE 555#define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4) 556#endif 557 558#ifndef LONG_LONG_FRACT_TYPE_SIZE 559#define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8) 560#endif 561 562#ifndef SHORT_ACCUM_TYPE_SIZE 563#define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2) 564#endif 565 566#ifndef ACCUM_TYPE_SIZE 567#define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2) 568#endif 569 570#ifndef LONG_ACCUM_TYPE_SIZE 571#define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2) 572#endif 573 574#ifndef LONG_LONG_ACCUM_TYPE_SIZE 575#define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2) 576#endif 577 578/* We let tm.h override the types used here, to handle trivial differences 579 such as the choice of unsigned int or long unsigned int for size_t. 580 When machines start needing nontrivial differences in the size type, 581 it would be best to do something here to figure out automatically 582 from other information what type to use. */ 583 584#ifndef SIZE_TYPE 585#define SIZE_TYPE "long unsigned int" 586#endif 587 588#ifndef SIZETYPE 589#define SIZETYPE SIZE_TYPE 590#endif 591 592#ifndef PID_TYPE 593#define PID_TYPE "int" 594#endif 595 596/* If GCC knows the exact uint_least16_t and uint_least32_t types from 597 <stdint.h>, use them for char16_t and char32_t. Otherwise, use 598 these guesses; getting the wrong type of a given width will not 599 affect C++ name mangling because in C++ these are distinct types 600 not typedefs. */ 601 602#ifdef UINT_LEAST16_TYPE 603#define CHAR16_TYPE UINT_LEAST16_TYPE 604#else 605#define CHAR16_TYPE "short unsigned int" 606#endif 607 608#ifdef UINT_LEAST32_TYPE 609#define CHAR32_TYPE UINT_LEAST32_TYPE 610#else 611#define CHAR32_TYPE "unsigned int" 612#endif 613 614#ifndef WCHAR_TYPE 615#define WCHAR_TYPE "int" 616#endif 617 618/* WCHAR_TYPE gets overridden by -fshort-wchar. */ 619#define MODIFIED_WCHAR_TYPE \ 620 (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE) 621 622#ifndef PTRDIFF_TYPE 623#define PTRDIFF_TYPE "long int" 624#endif 625 626#ifndef WINT_TYPE 627#define WINT_TYPE "unsigned int" 628#endif 629 630#ifndef INTMAX_TYPE 631#define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \ 632 ? "int" \ 633 : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \ 634 ? "long int" \ 635 : "long long int")) 636#endif 637 638#ifndef UINTMAX_TYPE 639#define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \ 640 ? "unsigned int" \ 641 : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \ 642 ? "long unsigned int" \ 643 : "long long unsigned int")) 644#endif 645 646 647/* There are no default definitions of these <stdint.h> types. */ 648 649#ifndef SIG_ATOMIC_TYPE 650#define SIG_ATOMIC_TYPE ((const char *) NULL) 651#endif 652 653#ifndef INT8_TYPE 654#define INT8_TYPE ((const char *) NULL) 655#endif 656 657#ifndef INT16_TYPE 658#define INT16_TYPE ((const char *) NULL) 659#endif 660 661#ifndef INT32_TYPE 662#define INT32_TYPE ((const char *) NULL) 663#endif 664 665#ifndef INT64_TYPE 666#define INT64_TYPE ((const char *) NULL) 667#endif 668 669#ifndef UINT8_TYPE 670#define UINT8_TYPE ((const char *) NULL) 671#endif 672 673#ifndef UINT16_TYPE 674#define UINT16_TYPE ((const char *) NULL) 675#endif 676 677#ifndef UINT32_TYPE 678#define UINT32_TYPE ((const char *) NULL) 679#endif 680 681#ifndef UINT64_TYPE 682#define UINT64_TYPE ((const char *) NULL) 683#endif 684 685#ifndef INT_LEAST8_TYPE 686#define INT_LEAST8_TYPE ((const char *) NULL) 687#endif 688 689#ifndef INT_LEAST16_TYPE 690#define INT_LEAST16_TYPE ((const char *) NULL) 691#endif 692 693#ifndef INT_LEAST32_TYPE 694#define INT_LEAST32_TYPE ((const char *) NULL) 695#endif 696 697#ifndef INT_LEAST64_TYPE 698#define INT_LEAST64_TYPE ((const char *) NULL) 699#endif 700 701#ifndef UINT_LEAST8_TYPE 702#define UINT_LEAST8_TYPE ((const char *) NULL) 703#endif 704 705#ifndef UINT_LEAST16_TYPE 706#define UINT_LEAST16_TYPE ((const char *) NULL) 707#endif 708 709#ifndef UINT_LEAST32_TYPE 710#define UINT_LEAST32_TYPE ((const char *) NULL) 711#endif 712 713#ifndef UINT_LEAST64_TYPE 714#define UINT_LEAST64_TYPE ((const char *) NULL) 715#endif 716 717#ifndef INT_FAST8_TYPE 718#define INT_FAST8_TYPE ((const char *) NULL) 719#endif 720 721#ifndef INT_FAST16_TYPE 722#define INT_FAST16_TYPE ((const char *) NULL) 723#endif 724 725#ifndef INT_FAST32_TYPE 726#define INT_FAST32_TYPE ((const char *) NULL) 727#endif 728 729#ifndef INT_FAST64_TYPE 730#define INT_FAST64_TYPE ((const char *) NULL) 731#endif 732 733#ifndef UINT_FAST8_TYPE 734#define UINT_FAST8_TYPE ((const char *) NULL) 735#endif 736 737#ifndef UINT_FAST16_TYPE 738#define UINT_FAST16_TYPE ((const char *) NULL) 739#endif 740 741#ifndef UINT_FAST32_TYPE 742#define UINT_FAST32_TYPE ((const char *) NULL) 743#endif 744 745#ifndef UINT_FAST64_TYPE 746#define UINT_FAST64_TYPE ((const char *) NULL) 747#endif 748 749#ifndef INTPTR_TYPE 750#define INTPTR_TYPE ((const char *) NULL) 751#endif 752 753#ifndef UINTPTR_TYPE 754#define UINTPTR_TYPE ((const char *) NULL) 755#endif 756 757/* Width in bits of a pointer. Mind the value of the macro `Pmode'. */ 758#ifndef POINTER_SIZE 759#define POINTER_SIZE BITS_PER_WORD 760#endif 761#ifndef POINTER_SIZE_UNITS 762#define POINTER_SIZE_UNITS ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT) 763#endif 764 765 766#ifndef PIC_OFFSET_TABLE_REGNUM 767#define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM 768#endif 769 770#ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 771#define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 0 772#endif 773 774#ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES 775#define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0 776#endif 777 778#ifndef TARGET_DECLSPEC 779#if TARGET_DLLIMPORT_DECL_ATTRIBUTES 780/* If the target supports the "dllimport" attribute, users are 781 probably used to the "__declspec" syntax. */ 782#define TARGET_DECLSPEC 1 783#else 784#define TARGET_DECLSPEC 0 785#endif 786#endif 787 788/* By default, the preprocessor should be invoked the same way in C++ 789 as in C. */ 790#ifndef CPLUSPLUS_CPP_SPEC 791#ifdef CPP_SPEC 792#define CPLUSPLUS_CPP_SPEC CPP_SPEC 793#endif 794#endif 795 796#ifndef ACCUMULATE_OUTGOING_ARGS 797#define ACCUMULATE_OUTGOING_ARGS 0 798#endif 799 800/* By default, use the GNU runtime for Objective C. */ 801#ifndef NEXT_OBJC_RUNTIME 802#define NEXT_OBJC_RUNTIME 0 803#endif 804 805/* Supply a default definition for PUSH_ARGS. */ 806#ifndef PUSH_ARGS 807#ifdef PUSH_ROUNDING 808#define PUSH_ARGS !ACCUMULATE_OUTGOING_ARGS 809#else 810#define PUSH_ARGS 0 811#endif 812#endif 813 814/* Decide whether a function's arguments should be processed 815 from first to last or from last to first. 816 817 They should if the stack and args grow in opposite directions, but 818 only if we have push insns. */ 819 820#ifdef PUSH_ROUNDING 821 822#ifndef PUSH_ARGS_REVERSED 823#if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD) 824#define PUSH_ARGS_REVERSED PUSH_ARGS 825#endif 826#endif 827 828#endif 829 830#ifndef PUSH_ARGS_REVERSED 831#define PUSH_ARGS_REVERSED 0 832#endif 833 834/* Default value for the alignment (in bits) a C conformant malloc has to 835 provide. This default is intended to be safe and always correct. */ 836#ifndef MALLOC_ABI_ALIGNMENT 837#define MALLOC_ABI_ALIGNMENT BITS_PER_WORD 838#endif 839 840/* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY. 841 STACK_BOUNDARY is required. */ 842#ifndef PREFERRED_STACK_BOUNDARY 843#define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY 844#endif 845 846/* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not 847 defined. */ 848#ifndef INCOMING_STACK_BOUNDARY 849#define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY 850#endif 851 852#ifndef TARGET_DEFAULT_PACK_STRUCT 853#define TARGET_DEFAULT_PACK_STRUCT 0 854#endif 855 856/* By default, the vtable entries are void pointers, the so the alignment 857 is the same as pointer alignment. The value of this macro specifies 858 the alignment of the vtable entry in bits. It should be defined only 859 when special alignment is necessary. */ 860#ifndef TARGET_VTABLE_ENTRY_ALIGN 861#define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE 862#endif 863 864/* There are a few non-descriptor entries in the vtable at offsets below 865 zero. If these entries must be padded (say, to preserve the alignment 866 specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of 867 words in each data entry. */ 868#ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE 869#define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1 870#endif 871 872/* Decide whether it is safe to use a local alias for a virtual function 873 when constructing thunks. */ 874#ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P 875#ifdef ASM_OUTPUT_DEF 876#define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1 877#else 878#define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0 879#endif 880#endif 881 882/* Select a format to encode pointers in exception handling data. We 883 prefer those that result in fewer dynamic relocations. Assume no 884 special support here and encode direct references. */ 885#ifndef ASM_PREFERRED_EH_DATA_FORMAT 886#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) DW_EH_PE_absptr 887#endif 888 889/* By default, the C++ compiler will use the lowest bit of the pointer 890 to function to indicate a pointer-to-member-function points to a 891 virtual member function. However, if FUNCTION_BOUNDARY indicates 892 function addresses aren't always even, the lowest bit of the delta 893 field will be used. */ 894#ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION 895#define TARGET_PTRMEMFUNC_VBIT_LOCATION \ 896 (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \ 897 ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta) 898#endif 899 900#ifndef DEFAULT_GDB_EXTENSIONS 901#define DEFAULT_GDB_EXTENSIONS 1 902#endif 903 904/* If more than one debugging type is supported, you must define 905 PREFERRED_DEBUGGING_TYPE to choose the default. */ 906 907#if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \ 908 + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \ 909 + defined (VMS_DEBUGGING_INFO)) 910#ifndef PREFERRED_DEBUGGING_TYPE 911#error You must define PREFERRED_DEBUGGING_TYPE 912#endif /* no PREFERRED_DEBUGGING_TYPE */ 913 914/* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE 915 here so other code needn't care. */ 916#elif defined DBX_DEBUGGING_INFO 917#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG 918 919#elif defined SDB_DEBUGGING_INFO 920#define PREFERRED_DEBUGGING_TYPE SDB_DEBUG 921 922#elif defined DWARF2_DEBUGGING_INFO 923#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG 924 925#elif defined VMS_DEBUGGING_INFO 926#define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG 927 928#elif defined XCOFF_DEBUGGING_INFO 929#define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG 930 931#else 932/* No debugging format is supported by this target. */ 933#define PREFERRED_DEBUGGING_TYPE NO_DEBUG 934#endif 935 936#ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL 937#define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false 938#endif 939 940/* True if the targets integer-comparison functions return { 0, 1, 2 941 } to indicate { <, ==, > }. False if { -1, 0, 1 } is used 942 instead. The libgcc routines are biased. */ 943#ifndef TARGET_LIB_INT_CMP_BIASED 944#define TARGET_LIB_INT_CMP_BIASED (true) 945#endif 946 947/* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files, 948 then the word-endianness is the same as for integers. */ 949#ifndef FLOAT_WORDS_BIG_ENDIAN 950#define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN 951#endif 952 953#ifndef REG_WORDS_BIG_ENDIAN 954#define REG_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN 955#endif 956 957#ifdef TARGET_FLT_EVAL_METHOD 958#define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 1 959#else 960#define TARGET_FLT_EVAL_METHOD 0 961#define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 0 962#endif 963 964#ifndef TARGET_DEC_EVAL_METHOD 965#define TARGET_DEC_EVAL_METHOD 2 966#endif 967 968#ifndef HAS_LONG_COND_BRANCH 969#define HAS_LONG_COND_BRANCH 0 970#endif 971 972#ifndef HAS_LONG_UNCOND_BRANCH 973#define HAS_LONG_UNCOND_BRANCH 0 974#endif 975 976/* Determine whether __cxa_atexit, rather than atexit, is used to 977 register C++ destructors for local statics and global objects. */ 978#ifndef DEFAULT_USE_CXA_ATEXIT 979#define DEFAULT_USE_CXA_ATEXIT 0 980#endif 981 982#if GCC_VERSION >= 3000 && defined IN_GCC 983/* These old constraint macros shouldn't appear anywhere in a 984 configuration using MD constraint definitions. */ 985#endif 986 987/* Determin whether the target runtime library is Bionic */ 988#ifndef TARGET_HAS_BIONIC 989#define TARGET_HAS_BIONIC 0 990#endif 991 992/* Indicate that CLZ and CTZ are undefined at zero. */ 993#ifndef CLZ_DEFINED_VALUE_AT_ZERO 994#define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0 995#endif 996#ifndef CTZ_DEFINED_VALUE_AT_ZERO 997#define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0 998#endif 999 1000/* Provide a default value for STORE_FLAG_VALUE. */ 1001#ifndef STORE_FLAG_VALUE 1002#define STORE_FLAG_VALUE 1 1003#endif 1004 1005/* This macro is used to determine what the largest unit size that 1006 move_by_pieces can use is. */ 1007 1008/* MOVE_MAX_PIECES is the number of bytes at a time which we can 1009 move efficiently, as opposed to MOVE_MAX which is the maximum 1010 number of bytes we can move with a single instruction. */ 1011 1012#ifndef MOVE_MAX_PIECES 1013#define MOVE_MAX_PIECES MOVE_MAX 1014#endif 1015 1016/* STORE_MAX_PIECES is the number of bytes at a time that we can 1017 store efficiently. Due to internal GCC limitations, this is 1018 MOVE_MAX_PIECES limited by the number of bytes GCC can represent 1019 for an immediate constant. */ 1020 1021#ifndef STORE_MAX_PIECES 1022#define STORE_MAX_PIECES MIN (MOVE_MAX_PIECES, 2 * sizeof (HOST_WIDE_INT)) 1023#endif 1024 1025#ifndef MAX_MOVE_MAX 1026#define MAX_MOVE_MAX MOVE_MAX 1027#endif 1028 1029#ifndef MIN_UNITS_PER_WORD 1030#define MIN_UNITS_PER_WORD UNITS_PER_WORD 1031#endif 1032 1033#ifndef MAX_BITS_PER_WORD 1034#define MAX_BITS_PER_WORD BITS_PER_WORD 1035#endif 1036 1037#ifndef STACK_POINTER_OFFSET 1038#define STACK_POINTER_OFFSET 0 1039#endif 1040 1041#ifndef LOCAL_REGNO 1042#define LOCAL_REGNO(REGNO) 0 1043#endif 1044 1045#ifndef HONOR_REG_ALLOC_ORDER 1046#define HONOR_REG_ALLOC_ORDER 0 1047#endif 1048 1049/* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, 1050 the stack pointer does not matter. The value is tested only in 1051 functions that have frame pointers. */ 1052#ifndef EXIT_IGNORE_STACK 1053#define EXIT_IGNORE_STACK 0 1054#endif 1055 1056/* Assume that case vectors are not pc-relative. */ 1057#ifndef CASE_VECTOR_PC_RELATIVE 1058#define CASE_VECTOR_PC_RELATIVE 0 1059#endif 1060 1061/* Assume that trampolines need function alignment. */ 1062#ifndef TRAMPOLINE_ALIGNMENT 1063#define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY 1064#endif 1065 1066/* Register mappings for target machines without register windows. */ 1067#ifndef INCOMING_REGNO 1068#define INCOMING_REGNO(N) (N) 1069#endif 1070 1071#ifndef OUTGOING_REGNO 1072#define OUTGOING_REGNO(N) (N) 1073#endif 1074 1075#ifndef SHIFT_COUNT_TRUNCATED 1076#define SHIFT_COUNT_TRUNCATED 0 1077#endif 1078 1079#ifndef LEGITIMATE_PIC_OPERAND_P 1080#define LEGITIMATE_PIC_OPERAND_P(X) 1 1081#endif 1082 1083#ifndef TARGET_MEM_CONSTRAINT 1084#define TARGET_MEM_CONSTRAINT 'm' 1085#endif 1086 1087#ifndef REVERSIBLE_CC_MODE 1088#define REVERSIBLE_CC_MODE(MODE) 0 1089#endif 1090 1091/* Biggest alignment supported by the object file format of this machine. */ 1092#ifndef MAX_OFILE_ALIGNMENT 1093#define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT 1094#endif 1095 1096#ifndef FRAME_GROWS_DOWNWARD 1097#define FRAME_GROWS_DOWNWARD 0 1098#endif 1099 1100#ifndef RETURN_ADDR_IN_PREVIOUS_FRAME 1101#define RETURN_ADDR_IN_PREVIOUS_FRAME 0 1102#endif 1103 1104/* On most machines, the CFA coincides with the first incoming parm. */ 1105#ifndef ARG_POINTER_CFA_OFFSET 1106#define ARG_POINTER_CFA_OFFSET(FNDECL) \ 1107 (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size) 1108#endif 1109 1110/* On most machines, we use the CFA as DW_AT_frame_base. */ 1111#ifndef CFA_FRAME_BASE_OFFSET 1112#define CFA_FRAME_BASE_OFFSET(FNDECL) 0 1113#endif 1114 1115/* The offset from the incoming value of %sp to the top of the stack frame 1116 for the current function. */ 1117#ifndef INCOMING_FRAME_SP_OFFSET 1118#define INCOMING_FRAME_SP_OFFSET 0 1119#endif 1120 1121#ifndef HARD_REGNO_NREGS_HAS_PADDING 1122#define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0 1123#define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1 1124#endif 1125 1126#ifndef OUTGOING_REG_PARM_STACK_SPACE 1127#define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0 1128#endif 1129 1130/* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by 1131 the backend. MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best 1132 effort stack alignment supported by the backend. If the backend 1133 supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and 1134 MAX_STACK_ALIGNMENT are the same. Otherwise, the incoming stack 1135 boundary will limit the maximum guaranteed stack alignment. */ 1136#ifdef MAX_STACK_ALIGNMENT 1137#define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT 1138#else 1139#define MAX_STACK_ALIGNMENT STACK_BOUNDARY 1140#define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY 1141#endif 1142 1143#define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY) 1144 1145#ifndef LOCAL_ALIGNMENT 1146#define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT 1147#endif 1148 1149#ifndef STACK_SLOT_ALIGNMENT 1150#define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \ 1151 ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN)) 1152#endif 1153 1154#ifndef LOCAL_DECL_ALIGNMENT 1155#define LOCAL_DECL_ALIGNMENT(DECL) \ 1156 LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL)) 1157#endif 1158 1159#ifndef MINIMUM_ALIGNMENT 1160#define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN) 1161#endif 1162 1163/* Alignment value for attribute ((aligned)). */ 1164#ifndef ATTRIBUTE_ALIGNED_VALUE 1165#define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT 1166#endif 1167 1168#ifndef SLOW_UNALIGNED_ACCESS 1169#define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) STRICT_ALIGNMENT 1170#endif 1171 1172/* For most ports anything that evaluates to a constant symbolic 1173 or integer value is acceptable as a constant address. */ 1174#ifndef CONSTANT_ADDRESS_P 1175#define CONSTANT_ADDRESS_P(X) (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE) 1176#endif 1177 1178#ifndef MAX_FIXED_MODE_SIZE 1179#define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode) 1180#endif 1181 1182/* Nonzero if structures and unions should be returned in memory. 1183 1184 This should only be defined if compatibility with another compiler or 1185 with an ABI is needed, because it results in slower code. */ 1186 1187#ifndef DEFAULT_PCC_STRUCT_RETURN 1188#define DEFAULT_PCC_STRUCT_RETURN 1 1189#endif 1190 1191#ifdef GCC_INSN_FLAGS_H 1192/* Dependent default target macro definitions 1193 1194 This section of defaults.h defines target macros that depend on generated 1195 headers. This is a bit awkward: We want to put all default definitions 1196 for target macros in defaults.h, but some of the defaults depend on the 1197 HAVE_* flags defines of insn-flags.h. But insn-flags.h is not always 1198 included by files that do include defaults.h. 1199 1200 Fortunately, the default macro definitions that depend on the HAVE_* 1201 macros are also the ones that will only be used inside GCC itself, i.e. 1202 not in the gen* programs or in target objects like libgcc. 1203 1204 Obviously, it would be best to keep this section of defaults.h as small 1205 as possible, by converting the macros defined below to target hooks or 1206 functions. 1207*/ 1208 1209/* The default branch cost is 1. */ 1210#ifndef BRANCH_COST 1211#define BRANCH_COST(speed_p, predictable_p) 1 1212#endif 1213 1214/* If a memory-to-memory move would take MOVE_RATIO or more simple 1215 move-instruction sequences, we will do a movmem or libcall instead. */ 1216 1217#ifndef MOVE_RATIO 1218#if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti) 1219#define MOVE_RATIO(speed) 2 1220#else 1221/* If we are optimizing for space (-Os), cut down the default move ratio. */ 1222#define MOVE_RATIO(speed) ((speed) ? 15 : 3) 1223#endif 1224#endif 1225 1226/* If a clear memory operation would take CLEAR_RATIO or more simple 1227 move-instruction sequences, we will do a setmem or libcall instead. */ 1228 1229#ifndef CLEAR_RATIO 1230#if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti) 1231#define CLEAR_RATIO(speed) 2 1232#else 1233/* If we are optimizing for space, cut down the default clear ratio. */ 1234#define CLEAR_RATIO(speed) ((speed) ? 15 :3) 1235#endif 1236#endif 1237 1238/* If a memory set (to value other than zero) operation would take 1239 SET_RATIO or more simple move-instruction sequences, we will do a movmem 1240 or libcall instead. */ 1241#ifndef SET_RATIO 1242#define SET_RATIO(speed) MOVE_RATIO (speed) 1243#endif 1244 1245/* Supply a default definition for FUNCTION_ARG_PADDING: 1246 usually pad upward, but pad short args downward on 1247 big-endian machines. */ 1248 1249#define DEFAULT_FUNCTION_ARG_PADDING(MODE, TYPE) \ 1250 (! BYTES_BIG_ENDIAN \ 1251 ? upward \ 1252 : (((MODE) == BLKmode \ 1253 ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST \ 1254 && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \ 1255 : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY) \ 1256 ? downward : upward)) 1257 1258#ifndef FUNCTION_ARG_PADDING 1259#define FUNCTION_ARG_PADDING(MODE, TYPE) \ 1260 DEFAULT_FUNCTION_ARG_PADDING ((MODE), (TYPE)) 1261#endif 1262 1263/* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save. 1264 Normally move_insn, so Pmode stack pointer. */ 1265 1266#ifndef STACK_SAVEAREA_MODE 1267#define STACK_SAVEAREA_MODE(LEVEL) Pmode 1268#endif 1269 1270/* Supply a default definition of STACK_SIZE_MODE for 1271 allocate_dynamic_stack_space. Normally PLUS/MINUS, so word_mode. */ 1272 1273#ifndef STACK_SIZE_MODE 1274#define STACK_SIZE_MODE word_mode 1275#endif 1276 1277/* Provide default values for the macros controlling stack checking. */ 1278 1279/* The default is neither full builtin stack checking... */ 1280#ifndef STACK_CHECK_BUILTIN 1281#define STACK_CHECK_BUILTIN 0 1282#endif 1283 1284/* ...nor static builtin stack checking. */ 1285#ifndef STACK_CHECK_STATIC_BUILTIN 1286#define STACK_CHECK_STATIC_BUILTIN 0 1287#endif 1288 1289/* The default interval is one page (4096 bytes). */ 1290#ifndef STACK_CHECK_PROBE_INTERVAL_EXP 1291#define STACK_CHECK_PROBE_INTERVAL_EXP 12 1292#endif 1293 1294/* The default is not to move the stack pointer. */ 1295#ifndef STACK_CHECK_MOVING_SP 1296#define STACK_CHECK_MOVING_SP 0 1297#endif 1298 1299/* This is a kludge to try to capture the discrepancy between the old 1300 mechanism (generic stack checking) and the new mechanism (static 1301 builtin stack checking). STACK_CHECK_PROTECT needs to be bumped 1302 for the latter because part of the protection area is effectively 1303 included in STACK_CHECK_MAX_FRAME_SIZE for the former. */ 1304#ifdef STACK_CHECK_PROTECT 1305#define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT 1306#else 1307#define STACK_OLD_CHECK_PROTECT \ 1308 (targetm_common.except_unwind_info (&global_options) == UI_SJLJ \ 1309 ? 75 * UNITS_PER_WORD \ 1310 : 8 * 1024) 1311#endif 1312 1313/* Minimum amount of stack required to recover from an anticipated stack 1314 overflow detection. The default value conveys an estimate of the amount 1315 of stack required to propagate an exception. */ 1316#ifndef STACK_CHECK_PROTECT 1317#define STACK_CHECK_PROTECT \ 1318 (targetm_common.except_unwind_info (&global_options) == UI_SJLJ \ 1319 ? 75 * UNITS_PER_WORD \ 1320 : 12 * 1024) 1321#endif 1322 1323/* Make the maximum frame size be the largest we can and still only need 1324 one probe per function. */ 1325#ifndef STACK_CHECK_MAX_FRAME_SIZE 1326#define STACK_CHECK_MAX_FRAME_SIZE \ 1327 ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD) 1328#endif 1329 1330/* This is arbitrary, but should be large enough everywhere. */ 1331#ifndef STACK_CHECK_FIXED_FRAME_SIZE 1332#define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD) 1333#endif 1334 1335/* Provide a reasonable default for the maximum size of an object to 1336 allocate in the fixed frame. We may need to be able to make this 1337 controllable by the user at some point. */ 1338#ifndef STACK_CHECK_MAX_VAR_SIZE 1339#define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100) 1340#endif 1341 1342/* By default, the C++ compiler will use function addresses in the 1343 vtable entries. Setting this nonzero tells the compiler to use 1344 function descriptors instead. The value of this macro says how 1345 many words wide the descriptor is (normally 2). It is assumed 1346 that the address of a function descriptor may be treated as a 1347 pointer to a function. */ 1348#ifndef TARGET_VTABLE_USES_DESCRIPTORS 1349#define TARGET_VTABLE_USES_DESCRIPTORS 0 1350#endif 1351 1352#ifndef SWITCHABLE_TARGET 1353#define SWITCHABLE_TARGET 0 1354#endif 1355 1356/* If the target supports integers that are wider than two 1357 HOST_WIDE_INTs on the host compiler, then the target should define 1358 TARGET_SUPPORTS_WIDE_INT and make the appropriate fixups. 1359 Otherwise the compiler really is not robust. */ 1360#ifndef TARGET_SUPPORTS_WIDE_INT 1361#define TARGET_SUPPORTS_WIDE_INT 0 1362#endif 1363 1364#endif /* GCC_INSN_FLAGS_H */ 1365 1366#endif /* ! GCC_DEFAULTS_H */ 1367