defaults.h revision 1.5
1 /* Definitions of various defaults for tm.h macros. 2 Copyright (C) 1992-2015 Free Software Foundation, Inc. 3 Contributed by Ron Guilmette (rfg (at) monkeys.com) 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify it under 8 the terms of the GNU General Public License as published by the Free 9 Software Foundation; either version 3, or (at your option) any later 10 version. 11 12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13 WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 for more details. 16 17 Under Section 7 of GPL version 3, you are granted additional 18 permissions described in the GCC Runtime Library Exception, version 19 3.1, as published by the Free Software Foundation. 20 21 You should have received a copy of the GNU General Public License and 22 a copy of the GCC Runtime Library Exception along with this program; 23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24 <http://www.gnu.org/licenses/>. */ 25 26 #ifndef GCC_DEFAULTS_H 27 #define GCC_DEFAULTS_H 28 29 /* How to start an assembler comment. */ 30 #ifndef ASM_COMMENT_START 31 #define ASM_COMMENT_START ";#" 32 #endif 33 34 /* Store in OUTPUT a string (made with alloca) containing an 35 assembler-name for a local static variable or function named NAME. 36 LABELNO is an integer which is different for each call. */ 37 38 #ifndef ASM_PN_FORMAT 39 # ifndef NO_DOT_IN_LABEL 40 # define ASM_PN_FORMAT "%s.%lu" 41 # else 42 # ifndef NO_DOLLAR_IN_LABEL 43 # define ASM_PN_FORMAT "%s$%lu" 44 # else 45 # define ASM_PN_FORMAT "__%s_%lu" 46 # endif 47 # endif 48 #endif /* ! ASM_PN_FORMAT */ 49 50 #ifndef ASM_FORMAT_PRIVATE_NAME 51 # define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \ 52 do { const char *const name_ = (NAME); \ 53 char *const output_ = (OUTPUT) = \ 54 (char *) alloca (strlen (name_) + 32); \ 55 sprintf (output_, ASM_PN_FORMAT, name_, (unsigned long)(LABELNO)); \ 56 } while (0) 57 #endif 58 59 /* Choose a reasonable default for ASM_OUTPUT_ASCII. */ 60 61 #ifndef ASM_OUTPUT_ASCII 62 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \ 63 do { \ 64 FILE *_hide_asm_out_file = (MYFILE); \ 65 const unsigned char *_hide_p = (const unsigned char *) (MYSTRING); \ 66 int _hide_thissize = (MYLENGTH); \ 67 { \ 68 FILE *asm_out_file = _hide_asm_out_file; \ 69 const unsigned char *p = _hide_p; \ 70 int thissize = _hide_thissize; \ 71 int i; \ 72 fprintf (asm_out_file, "\t.ascii \""); \ 73 \ 74 for (i = 0; i < thissize; i++) \ 75 { \ 76 int c = p[i]; \ 77 if (c == '\"' || c == '\\') \ 78 putc ('\\', asm_out_file); \ 79 if (ISPRINT (c)) \ 80 putc (c, asm_out_file); \ 81 else \ 82 { \ 83 fprintf (asm_out_file, "\\%o", c); \ 84 /* After an octal-escape, if a digit follows, \ 85 terminate one string constant and start another. \ 86 The VAX assembler fails to stop reading the escape \ 87 after three digits, so this is the only way we \ 88 can get it to parse the data properly. */ \ 89 if (i < thissize - 1 && ISDIGIT (p[i + 1])) \ 90 fprintf (asm_out_file, "\"\n\t.ascii \""); \ 91 } \ 92 } \ 93 fprintf (asm_out_file, "\"\n"); \ 94 } \ 95 } \ 96 while (0) 97 #endif 98 99 /* This is how we tell the assembler to equate two values. */ 100 #ifdef SET_ASM_OP 101 #ifndef ASM_OUTPUT_DEF 102 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \ 103 do { fprintf ((FILE), "%s", SET_ASM_OP); \ 104 assemble_name (FILE, LABEL1); \ 105 fprintf (FILE, ","); \ 106 assemble_name (FILE, LABEL2); \ 107 fprintf (FILE, "\n"); \ 108 } while (0) 109 #endif 110 #endif 111 112 #ifndef IFUNC_ASM_TYPE 113 #define IFUNC_ASM_TYPE "gnu_indirect_function" 114 #endif 115 116 #ifndef TLS_COMMON_ASM_OP 117 #define TLS_COMMON_ASM_OP ".tls_common" 118 #endif 119 120 #if defined (HAVE_AS_TLS) && !defined (ASM_OUTPUT_TLS_COMMON) 121 #define ASM_OUTPUT_TLS_COMMON(FILE, DECL, NAME, SIZE) \ 122 do \ 123 { \ 124 fprintf ((FILE), "\t%s\t", TLS_COMMON_ASM_OP); \ 125 assemble_name ((FILE), (NAME)); \ 126 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", \ 127 (SIZE), DECL_ALIGN (DECL) / BITS_PER_UNIT); \ 128 } \ 129 while (0) 130 #endif 131 132 /* Decide whether to defer emitting the assembler output for an equate 133 of two values. The default is to not defer output. */ 134 #ifndef TARGET_DEFERRED_OUTPUT_DEFS 135 #define TARGET_DEFERRED_OUTPUT_DEFS(DECL,TARGET) false 136 #endif 137 138 /* This is how to output the definition of a user-level label named 139 NAME, such as the label on variable NAME. */ 140 141 #ifndef ASM_OUTPUT_LABEL 142 #define ASM_OUTPUT_LABEL(FILE,NAME) \ 143 do { \ 144 assemble_name ((FILE), (NAME)); \ 145 fputs (":\n", (FILE)); \ 146 } while (0) 147 #endif 148 149 /* This is how to output the definition of a user-level label named 150 NAME, such as the label on a function. */ 151 152 #ifndef ASM_OUTPUT_FUNCTION_LABEL 153 #define ASM_OUTPUT_FUNCTION_LABEL(FILE, NAME, DECL) \ 154 ASM_OUTPUT_LABEL ((FILE), (NAME)) 155 #endif 156 157 /* Output the definition of a compiler-generated label named NAME. */ 158 #ifndef ASM_OUTPUT_INTERNAL_LABEL 159 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,NAME) \ 160 do { \ 161 assemble_name_raw ((FILE), (NAME)); \ 162 fputs (":\n", (FILE)); \ 163 } while (0) 164 #endif 165 166 /* This is how to output a reference to a user-level label named NAME. */ 167 168 #ifndef ASM_OUTPUT_LABELREF 169 #define ASM_OUTPUT_LABELREF(FILE,NAME) \ 170 do { \ 171 fputs (user_label_prefix, (FILE)); \ 172 fputs ((NAME), (FILE)); \ 173 } while (0); 174 #endif 175 176 /* Allow target to print debug info labels specially. This is useful for 177 VLIW targets, since debug info labels should go into the middle of 178 instruction bundles instead of breaking them. */ 179 180 #ifndef ASM_OUTPUT_DEBUG_LABEL 181 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \ 182 (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM) 183 #endif 184 185 /* This is how we tell the assembler that a symbol is weak. */ 186 #ifndef ASM_OUTPUT_WEAK_ALIAS 187 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF) 188 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE) \ 189 do \ 190 { \ 191 ASM_WEAKEN_LABEL (STREAM, NAME); \ 192 if (VALUE) \ 193 ASM_OUTPUT_DEF (STREAM, NAME, VALUE); \ 194 } \ 195 while (0) 196 #endif 197 #endif 198 199 /* This is how we tell the assembler that a symbol is a weak alias to 200 another symbol that doesn't require the other symbol to be defined. 201 Uses of the former will turn into weak uses of the latter, i.e., 202 uses that, in case the latter is undefined, will not cause errors, 203 and will add it to the symbol table as weak undefined. However, if 204 the latter is referenced directly, a strong reference prevails. */ 205 #ifndef ASM_OUTPUT_WEAKREF 206 #if defined HAVE_GAS_WEAKREF 207 #define ASM_OUTPUT_WEAKREF(FILE, DECL, NAME, VALUE) \ 208 do \ 209 { \ 210 fprintf ((FILE), "\t.weakref\t"); \ 211 assemble_name ((FILE), (NAME)); \ 212 fprintf ((FILE), ","); \ 213 assemble_name ((FILE), (VALUE)); \ 214 fprintf ((FILE), "\n"); \ 215 } \ 216 while (0) 217 #endif 218 #endif 219 220 /* How to emit a .type directive. */ 221 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE 222 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT 223 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE) \ 224 do \ 225 { \ 226 fputs (TYPE_ASM_OP, STREAM); \ 227 assemble_name (STREAM, NAME); \ 228 fputs (", ", STREAM); \ 229 fprintf (STREAM, TYPE_OPERAND_FMT, TYPE); \ 230 putc ('\n', STREAM); \ 231 } \ 232 while (0) 233 #endif 234 #endif 235 236 /* How to emit a .size directive. */ 237 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE 238 #ifdef SIZE_ASM_OP 239 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE) \ 240 do \ 241 { \ 242 HOST_WIDE_INT size_ = (SIZE); \ 243 fputs (SIZE_ASM_OP, STREAM); \ 244 assemble_name (STREAM, NAME); \ 245 fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \ 246 } \ 247 while (0) 248 249 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME) \ 250 do \ 251 { \ 252 fputs (SIZE_ASM_OP, STREAM); \ 253 assemble_name (STREAM, NAME); \ 254 fputs (", .-", STREAM); \ 255 assemble_name (STREAM, NAME); \ 256 putc ('\n', STREAM); \ 257 } \ 258 while (0) 259 260 #endif 261 #endif 262 263 /* This determines whether or not we support weak symbols. SUPPORTS_WEAK 264 must be a preprocessor constant. */ 265 #ifndef SUPPORTS_WEAK 266 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL) 267 #define SUPPORTS_WEAK 1 268 #else 269 #define SUPPORTS_WEAK 0 270 #endif 271 #endif 272 273 /* This determines whether or not we support weak symbols during target 274 code generation. TARGET_SUPPORTS_WEAK can be any valid C expression. */ 275 #ifndef TARGET_SUPPORTS_WEAK 276 #define TARGET_SUPPORTS_WEAK (SUPPORTS_WEAK) 277 #endif 278 279 /* This determines whether or not we support the discriminator 280 attribute in the .loc directive. */ 281 #ifndef SUPPORTS_DISCRIMINATOR 282 #ifdef HAVE_GAS_DISCRIMINATOR 283 #define SUPPORTS_DISCRIMINATOR 1 284 #else 285 #define SUPPORTS_DISCRIMINATOR 0 286 #endif 287 #endif 288 289 /* This determines whether or not we support link-once semantics. */ 290 #ifndef SUPPORTS_ONE_ONLY 291 #ifdef MAKE_DECL_ONE_ONLY 292 #define SUPPORTS_ONE_ONLY 1 293 #else 294 #define SUPPORTS_ONE_ONLY 0 295 #endif 296 #endif 297 298 /* This determines whether weak symbols must be left out of a static 299 archive's table of contents. Defining this macro to be nonzero has 300 the consequence that certain symbols will not be made weak that 301 otherwise would be. The C++ ABI requires this macro to be zero; 302 see the documentation. */ 303 #ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC 304 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0 305 #endif 306 307 /* This determines whether or not we need linkonce unwind information. */ 308 #ifndef TARGET_USES_WEAK_UNWIND_INFO 309 #define TARGET_USES_WEAK_UNWIND_INFO 0 310 #endif 311 312 /* By default, there is no prefix on user-defined symbols. */ 313 #ifndef USER_LABEL_PREFIX 314 #define USER_LABEL_PREFIX "" 315 #endif 316 317 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to 318 provide a weak attribute. Else define it to nothing. 319 320 This would normally belong in ansidecl.h, but SUPPORTS_WEAK is 321 not available at that time. 322 323 Note, this is only for use by target files which we know are to be 324 compiled by GCC. */ 325 #ifndef TARGET_ATTRIBUTE_WEAK 326 # if SUPPORTS_WEAK 327 # define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak)) 328 # else 329 # define TARGET_ATTRIBUTE_WEAK 330 # endif 331 #endif 332 333 /* By default we can assume that all global symbols are in one namespace, 334 across all shared libraries. */ 335 #ifndef MULTIPLE_SYMBOL_SPACES 336 # define MULTIPLE_SYMBOL_SPACES 0 337 #endif 338 339 /* If the target supports init_priority C++ attribute, give 340 SUPPORTS_INIT_PRIORITY a nonzero value. */ 341 #ifndef SUPPORTS_INIT_PRIORITY 342 #define SUPPORTS_INIT_PRIORITY 1 343 #endif /* SUPPORTS_INIT_PRIORITY */ 344 345 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that 346 the rest of the DWARF 2 frame unwind support is also provided. */ 347 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX) 348 #define DWARF2_UNWIND_INFO 1 349 #endif 350 351 /* If we have named sections, and we're using crtstuff to run ctors, 352 use them for registering eh frame information. */ 353 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \ 354 && !defined (EH_FRAME_IN_DATA_SECTION) 355 #ifndef EH_FRAME_SECTION_NAME 356 #define EH_FRAME_SECTION_NAME ".eh_frame" 357 #endif 358 #endif 359 360 /* On many systems, different EH table encodings are used under 361 difference circumstances. Some will require runtime relocations; 362 some will not. For those that do not require runtime relocations, 363 we would like to make the table read-only. However, since the 364 read-only tables may need to be combined with read-write tables 365 that do require runtime relocation, it is not safe to make the 366 tables read-only unless the linker will merge read-only and 367 read-write sections into a single read-write section. If your 368 linker does not have this ability, but your system is such that no 369 encoding used with non-PIC code will ever require a runtime 370 relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in 371 your target configuration file. */ 372 #ifndef EH_TABLES_CAN_BE_READ_ONLY 373 #ifdef HAVE_LD_RO_RW_SECTION_MIXING 374 #define EH_TABLES_CAN_BE_READ_ONLY 1 375 #else 376 #define EH_TABLES_CAN_BE_READ_ONLY 0 377 #endif 378 #endif 379 380 /* 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. */ 383 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK 384 #ifndef JCR_SECTION_NAME 385 #define JCR_SECTION_NAME ".jcr" 386 #endif 387 #endif 388 389 /* This decision to use a .jcr section can be overridden by defining 390 USE_JCR_SECTION to 0 in target file. This is necessary if target 391 can define JCR_SECTION_NAME but does not have crtstuff or 392 linker support for .jcr section. */ 393 #ifndef TARGET_USE_JCR_SECTION 394 #ifdef JCR_SECTION_NAME 395 #define TARGET_USE_JCR_SECTION 1 396 #else 397 #define TARGET_USE_JCR_SECTION 0 398 #endif 399 #endif 400 401 /* Number of hardware registers that go into the DWARF-2 unwind info. 402 If not defined, equals FIRST_PSEUDO_REGISTER */ 403 404 #ifndef DWARF_FRAME_REGISTERS 405 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER 406 #endif 407 408 /* Offsets recorded in opcodes are a multiple of this alignment factor. */ 409 #ifndef DWARF_CIE_DATA_ALIGNMENT 410 #ifdef STACK_GROWS_DOWNWARD 411 #define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD)) 412 #else 413 #define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD) 414 #endif 415 #endif 416 417 /* The DWARF 2 CFA column which tracks the return address. Normally this 418 is the column for PC, or the first column after all of the hard 419 registers. */ 420 #ifndef DWARF_FRAME_RETURN_COLUMN 421 #ifdef PC_REGNUM 422 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM) 423 #else 424 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGISTERS 425 #endif 426 #endif 427 428 /* How to renumber registers for dbx and gdb. If not defined, assume 429 no renumbering is necessary. */ 430 431 #ifndef DBX_REGISTER_NUMBER 432 #define DBX_REGISTER_NUMBER(REGNO) (REGNO) 433 #endif 434 435 /* The mapping from gcc register number to DWARF 2 CFA column number. 436 By default, we just provide columns for all registers. */ 437 #ifndef DWARF_FRAME_REGNUM 438 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG) 439 #endif 440 441 /* The mapping from dwarf CFA reg number to internal dwarf reg numbers. */ 442 #ifndef DWARF_REG_TO_UNWIND_COLUMN 443 #define DWARF_REG_TO_UNWIND_COLUMN(REGNO) (REGNO) 444 #endif 445 446 /* Map register numbers held in the call frame info that gcc has 447 collected using DWARF_FRAME_REGNUM to those that should be output in 448 .debug_frame and .eh_frame. */ 449 #ifndef DWARF2_FRAME_REG_OUT 450 #define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) (REGNO) 451 #endif 452 453 /* The size of addresses as they appear in the Dwarf 2 data. 454 Some architectures use word addresses to refer to code locations, 455 but Dwarf 2 info always uses byte addresses. On such machines, 456 Dwarf 2 addresses need to be larger than the architecture's 457 pointers. */ 458 #ifndef DWARF2_ADDR_SIZE 459 #define DWARF2_ADDR_SIZE ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT) 460 #endif 461 462 /* The size in bytes of a DWARF field indicating an offset or length 463 relative to a debug info section, specified to be 4 bytes in the 464 DWARF-2 specification. The SGI/MIPS ABI defines it to be the same 465 as PTR_SIZE. */ 466 #ifndef DWARF_OFFSET_SIZE 467 #define DWARF_OFFSET_SIZE 4 468 #endif 469 470 /* The size in bytes of a DWARF 4 type signature. */ 471 #ifndef DWARF_TYPE_SIGNATURE_SIZE 472 #define DWARF_TYPE_SIGNATURE_SIZE 8 473 #endif 474 475 /* Default sizes for base C types. If the sizes are different for 476 your target, you should override these values by defining the 477 appropriate symbols in your tm.h file. */ 478 479 #if BITS_PER_UNIT == 8 480 #define LOG2_BITS_PER_UNIT 3 481 #elif BITS_PER_UNIT == 16 482 #define LOG2_BITS_PER_UNIT 4 483 #else 484 #error Unknown BITS_PER_UNIT 485 #endif 486 487 #ifndef BITS_PER_WORD 488 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD) 489 #endif 490 491 #ifndef CHAR_TYPE_SIZE 492 #define CHAR_TYPE_SIZE BITS_PER_UNIT 493 #endif 494 495 #ifndef BOOL_TYPE_SIZE 496 /* `bool' has size and alignment `1', on almost all platforms. */ 497 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE 498 #endif 499 500 #ifndef SHORT_TYPE_SIZE 501 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2)) 502 #endif 503 504 #ifndef INT_TYPE_SIZE 505 #define INT_TYPE_SIZE BITS_PER_WORD 506 #endif 507 508 #ifndef LONG_TYPE_SIZE 509 #define LONG_TYPE_SIZE BITS_PER_WORD 510 #endif 511 512 #ifndef LONG_LONG_TYPE_SIZE 513 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2) 514 #endif 515 516 #ifndef WCHAR_TYPE_SIZE 517 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE 518 #endif 519 520 #ifndef FLOAT_TYPE_SIZE 521 #define FLOAT_TYPE_SIZE BITS_PER_WORD 522 #endif 523 524 #ifndef DOUBLE_TYPE_SIZE 525 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2) 526 #endif 527 528 #ifndef LONG_DOUBLE_TYPE_SIZE 529 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2) 530 #endif 531 532 #ifndef DECIMAL32_TYPE_SIZE 533 #define DECIMAL32_TYPE_SIZE 32 534 #endif 535 536 #ifndef DECIMAL64_TYPE_SIZE 537 #define DECIMAL64_TYPE_SIZE 64 538 #endif 539 540 #ifndef DECIMAL128_TYPE_SIZE 541 #define DECIMAL128_TYPE_SIZE 128 542 #endif 543 544 #ifndef SHORT_FRACT_TYPE_SIZE 545 #define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT 546 #endif 547 548 #ifndef FRACT_TYPE_SIZE 549 #define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2) 550 #endif 551 552 #ifndef LONG_FRACT_TYPE_SIZE 553 #define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4) 554 #endif 555 556 #ifndef LONG_LONG_FRACT_TYPE_SIZE 557 #define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8) 558 #endif 559 560 #ifndef SHORT_ACCUM_TYPE_SIZE 561 #define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2) 562 #endif 563 564 #ifndef ACCUM_TYPE_SIZE 565 #define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2) 566 #endif 567 568 #ifndef LONG_ACCUM_TYPE_SIZE 569 #define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2) 570 #endif 571 572 #ifndef LONG_LONG_ACCUM_TYPE_SIZE 573 #define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2) 574 #endif 575 576 /* We let tm.h override the types used here, to handle trivial differences 577 such as the choice of unsigned int or long unsigned int for size_t. 578 When machines start needing nontrivial differences in the size type, 579 it would be best to do something here to figure out automatically 580 from other information what type to use. */ 581 582 #ifndef SIZE_TYPE 583 #define SIZE_TYPE "long unsigned int" 584 #endif 585 586 #ifndef SIZETYPE 587 #define SIZETYPE SIZE_TYPE 588 #endif 589 590 #ifndef PID_TYPE 591 #define PID_TYPE "int" 592 #endif 593 594 /* If GCC knows the exact uint_least16_t and uint_least32_t types from 595 <stdint.h>, use them for char16_t and char32_t. Otherwise, use 596 these guesses; getting the wrong type of a given width will not 597 affect C++ name mangling because in C++ these are distinct types 598 not typedefs. */ 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 /* Supply a default definition for PUSH_ARGS. */ 804 #ifndef PUSH_ARGS 805 #ifdef PUSH_ROUNDING 806 #define PUSH_ARGS !ACCUMULATE_OUTGOING_ARGS 807 #else 808 #define PUSH_ARGS 0 809 #endif 810 #endif 811 812 /* Decide whether a function's arguments should be processed 813 from first to last or from last to first. 814 815 They should if the stack and args grow in opposite directions, but 816 only if we have push insns. */ 817 818 #ifdef PUSH_ROUNDING 819 820 #ifndef PUSH_ARGS_REVERSED 821 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD) 822 #define PUSH_ARGS_REVERSED PUSH_ARGS 823 #endif 824 #endif 825 826 #endif 827 828 #ifndef PUSH_ARGS_REVERSED 829 #define PUSH_ARGS_REVERSED 0 830 #endif 831 832 /* Default value for the alignment (in bits) a C conformant malloc has to 833 provide. This default is intended to be safe and always correct. */ 834 #ifndef MALLOC_ABI_ALIGNMENT 835 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD 836 #endif 837 838 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY. 839 STACK_BOUNDARY is required. */ 840 #ifndef PREFERRED_STACK_BOUNDARY 841 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY 842 #endif 843 844 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not 845 defined. */ 846 #ifndef INCOMING_STACK_BOUNDARY 847 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY 848 #endif 849 850 #ifndef TARGET_DEFAULT_PACK_STRUCT 851 #define TARGET_DEFAULT_PACK_STRUCT 0 852 #endif 853 854 /* By default, the vtable entries are void pointers, the so the alignment 855 is the same as pointer alignment. The value of this macro specifies 856 the alignment of the vtable entry in bits. It should be defined only 857 when special alignment is necessary. */ 858 #ifndef TARGET_VTABLE_ENTRY_ALIGN 859 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE 860 #endif 861 862 /* There are a few non-descriptor entries in the vtable at offsets below 863 zero. If these entries must be padded (say, to preserve the alignment 864 specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of 865 words in each data entry. */ 866 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE 867 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1 868 #endif 869 870 /* Decide whether it is safe to use a local alias for a virtual function 871 when constructing thunks. */ 872 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P 873 #ifdef ASM_OUTPUT_DEF 874 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1 875 #else 876 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 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 /* If more than one debugging type is supported, you must define 903 PREFERRED_DEBUGGING_TYPE to choose the default. */ 904 905 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \ 906 + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \ 907 + defined (VMS_DEBUGGING_INFO)) 908 #ifndef PREFERRED_DEBUGGING_TYPE 909 #error You must define PREFERRED_DEBUGGING_TYPE 910 #endif /* no PREFERRED_DEBUGGING_TYPE */ 911 912 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE 913 here so other code needn't care. */ 914 #elif defined DBX_DEBUGGING_INFO 915 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG 916 917 #elif defined SDB_DEBUGGING_INFO 918 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG 919 920 #elif defined DWARF2_DEBUGGING_INFO 921 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG 922 923 #elif defined VMS_DEBUGGING_INFO 924 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG 925 926 #elif defined XCOFF_DEBUGGING_INFO 927 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG 928 929 #else 930 /* No debugging format is supported by this target. */ 931 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG 932 #endif 933 934 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL 935 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false 936 #endif 937 938 /* True if the targets integer-comparison functions return { 0, 1, 2 939 } to indicate { <, ==, > }. False if { -1, 0, 1 } is used 940 instead. The libgcc routines are biased. */ 941 #ifndef TARGET_LIB_INT_CMP_BIASED 942 #define TARGET_LIB_INT_CMP_BIASED (true) 943 #endif 944 945 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files, 946 then the word-endianness is the same as for integers. */ 947 #ifndef FLOAT_WORDS_BIG_ENDIAN 948 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN 949 #endif 950 951 #ifndef REG_WORDS_BIG_ENDIAN 952 #define REG_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN 953 #endif 954 955 #ifdef TARGET_FLT_EVAL_METHOD 956 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 1 957 #else 958 #define TARGET_FLT_EVAL_METHOD 0 959 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 0 960 #endif 961 962 #ifndef TARGET_DEC_EVAL_METHOD 963 #define TARGET_DEC_EVAL_METHOD 2 964 #endif 965 966 #ifndef HAS_LONG_COND_BRANCH 967 #define HAS_LONG_COND_BRANCH 0 968 #endif 969 970 #ifndef HAS_LONG_UNCOND_BRANCH 971 #define HAS_LONG_UNCOND_BRANCH 0 972 #endif 973 974 /* Determine whether __cxa_atexit, rather than atexit, is used to 975 register C++ destructors for local statics and global objects. */ 976 #ifndef DEFAULT_USE_CXA_ATEXIT 977 #define DEFAULT_USE_CXA_ATEXIT 0 978 #endif 979 980 #if GCC_VERSION >= 3000 && defined IN_GCC 981 /* These old constraint macros shouldn't appear anywhere in a 982 configuration using MD constraint definitions. */ 983 #endif 984 985 /* Determin whether the target runtime library is Bionic */ 986 #ifndef TARGET_HAS_BIONIC 987 #define TARGET_HAS_BIONIC 0 988 #endif 989 990 /* Indicate that CLZ and CTZ are undefined at zero. */ 991 #ifndef CLZ_DEFINED_VALUE_AT_ZERO 992 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0 993 #endif 994 #ifndef CTZ_DEFINED_VALUE_AT_ZERO 995 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0 996 #endif 997 998 /* Provide a default value for STORE_FLAG_VALUE. */ 999 #ifndef STORE_FLAG_VALUE 1000 #define STORE_FLAG_VALUE 1 1001 #endif 1002 1003 /* This macro is used to determine what the largest unit size that 1004 move_by_pieces can use is. */ 1005 1006 /* MOVE_MAX_PIECES is the number of bytes at a time which we can 1007 move efficiently, as opposed to MOVE_MAX which is the maximum 1008 number of bytes we can move with a single instruction. */ 1009 1010 #ifndef MOVE_MAX_PIECES 1011 #define MOVE_MAX_PIECES MOVE_MAX 1012 #endif 1013 1014 /* STORE_MAX_PIECES is the number of bytes at a time that we can 1015 store efficiently. Due to internal GCC limitations, this is 1016 MOVE_MAX_PIECES limited by the number of bytes GCC can represent 1017 for an immediate constant. */ 1018 1019 #ifndef STORE_MAX_PIECES 1020 #define STORE_MAX_PIECES MIN (MOVE_MAX_PIECES, 2 * sizeof (HOST_WIDE_INT)) 1021 #endif 1022 1023 #ifndef MAX_MOVE_MAX 1024 #define MAX_MOVE_MAX MOVE_MAX 1025 #endif 1026 1027 #ifndef MIN_UNITS_PER_WORD 1028 #define MIN_UNITS_PER_WORD UNITS_PER_WORD 1029 #endif 1030 1031 #ifndef MAX_BITS_PER_WORD 1032 #define MAX_BITS_PER_WORD BITS_PER_WORD 1033 #endif 1034 1035 #ifndef STACK_POINTER_OFFSET 1036 #define STACK_POINTER_OFFSET 0 1037 #endif 1038 1039 #ifndef LOCAL_REGNO 1040 #define LOCAL_REGNO(REGNO) 0 1041 #endif 1042 1043 #ifndef HONOR_REG_ALLOC_ORDER 1044 #define HONOR_REG_ALLOC_ORDER 0 1045 #endif 1046 1047 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, 1048 the stack pointer does not matter. The value is tested only in 1049 functions that have frame pointers. */ 1050 #ifndef EXIT_IGNORE_STACK 1051 #define EXIT_IGNORE_STACK 0 1052 #endif 1053 1054 /* Assume that case vectors are not pc-relative. */ 1055 #ifndef CASE_VECTOR_PC_RELATIVE 1056 #define CASE_VECTOR_PC_RELATIVE 0 1057 #endif 1058 1059 /* Assume that trampolines need function alignment. */ 1060 #ifndef TRAMPOLINE_ALIGNMENT 1061 #define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY 1062 #endif 1063 1064 /* Register mappings for target machines without register windows. */ 1065 #ifndef INCOMING_REGNO 1066 #define INCOMING_REGNO(N) (N) 1067 #endif 1068 1069 #ifndef OUTGOING_REGNO 1070 #define OUTGOING_REGNO(N) (N) 1071 #endif 1072 1073 #ifndef SHIFT_COUNT_TRUNCATED 1074 #define SHIFT_COUNT_TRUNCATED 0 1075 #endif 1076 1077 #ifndef LEGITIMATE_PIC_OPERAND_P 1078 #define LEGITIMATE_PIC_OPERAND_P(X) 1 1079 #endif 1080 1081 #ifndef TARGET_MEM_CONSTRAINT 1082 #define TARGET_MEM_CONSTRAINT 'm' 1083 #endif 1084 1085 #ifndef REVERSIBLE_CC_MODE 1086 #define REVERSIBLE_CC_MODE(MODE) 0 1087 #endif 1088 1089 /* Biggest alignment supported by the object file format of this machine. */ 1090 #ifndef MAX_OFILE_ALIGNMENT 1091 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT 1092 #endif 1093 1094 #ifndef FRAME_GROWS_DOWNWARD 1095 #define FRAME_GROWS_DOWNWARD 0 1096 #endif 1097 1098 #ifndef RETURN_ADDR_IN_PREVIOUS_FRAME 1099 #define RETURN_ADDR_IN_PREVIOUS_FRAME 0 1100 #endif 1101 1102 /* On most machines, the CFA coincides with the first incoming parm. */ 1103 #ifndef ARG_POINTER_CFA_OFFSET 1104 #define ARG_POINTER_CFA_OFFSET(FNDECL) \ 1105 (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size) 1106 #endif 1107 1108 /* On most machines, we use the CFA as DW_AT_frame_base. */ 1109 #ifndef CFA_FRAME_BASE_OFFSET 1110 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0 1111 #endif 1112 1113 /* The offset from the incoming value of %sp to the top of the stack frame 1114 for the current function. */ 1115 #ifndef INCOMING_FRAME_SP_OFFSET 1116 #define INCOMING_FRAME_SP_OFFSET 0 1117 #endif 1118 1119 #ifndef HARD_REGNO_NREGS_HAS_PADDING 1120 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0 1121 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1 1122 #endif 1123 1124 #ifndef OUTGOING_REG_PARM_STACK_SPACE 1125 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0 1126 #endif 1127 1128 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by 1129 the backend. MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best 1130 effort stack alignment supported by the backend. If the backend 1131 supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and 1132 MAX_STACK_ALIGNMENT are the same. Otherwise, the incoming stack 1133 boundary will limit the maximum guaranteed stack alignment. */ 1134 #ifdef MAX_STACK_ALIGNMENT 1135 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT 1136 #else 1137 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY 1138 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY 1139 #endif 1140 1141 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY) 1142 1143 #ifndef LOCAL_ALIGNMENT 1144 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT 1145 #endif 1146 1147 #ifndef STACK_SLOT_ALIGNMENT 1148 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \ 1149 ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN)) 1150 #endif 1151 1152 #ifndef LOCAL_DECL_ALIGNMENT 1153 #define LOCAL_DECL_ALIGNMENT(DECL) \ 1154 LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL)) 1155 #endif 1156 1157 #ifndef MINIMUM_ALIGNMENT 1158 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN) 1159 #endif 1160 1161 /* Alignment value for attribute ((aligned)). */ 1162 #ifndef ATTRIBUTE_ALIGNED_VALUE 1163 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT 1164 #endif 1165 1166 #ifndef SLOW_UNALIGNED_ACCESS 1167 #define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) STRICT_ALIGNMENT 1168 #endif 1169 1170 /* For most ports anything that evaluates to a constant symbolic 1171 or integer value is acceptable as a constant address. */ 1172 #ifndef CONSTANT_ADDRESS_P 1173 #define CONSTANT_ADDRESS_P(X) (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE) 1174 #endif 1175 1176 #ifndef MAX_FIXED_MODE_SIZE 1177 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode) 1178 #endif 1179 1180 /* Nonzero if structures and unions should be returned in memory. 1181 1182 This should only be defined if compatibility with another compiler or 1183 with an ABI is needed, because it results in slower code. */ 1184 1185 #ifndef DEFAULT_PCC_STRUCT_RETURN 1186 #define DEFAULT_PCC_STRUCT_RETURN 1 1187 #endif 1188 1189 #ifdef GCC_INSN_FLAGS_H 1190 /* Dependent default target macro definitions 1191 1192 This section of defaults.h defines target macros that depend on generated 1193 headers. This is a bit awkward: We want to put all default definitions 1194 for target macros in defaults.h, but some of the defaults depend on the 1195 HAVE_* flags defines of insn-flags.h. But insn-flags.h is not always 1196 included by files that do include defaults.h. 1197 1198 Fortunately, the default macro definitions that depend on the HAVE_* 1199 macros are also the ones that will only be used inside GCC itself, i.e. 1200 not in the gen* programs or in target objects like libgcc. 1201 1202 Obviously, it would be best to keep this section of defaults.h as small 1203 as possible, by converting the macros defined below to target hooks or 1204 functions. 1205 */ 1206 1207 /* The default branch cost is 1. */ 1208 #ifndef BRANCH_COST 1209 #define BRANCH_COST(speed_p, predictable_p) 1 1210 #endif 1211 1212 /* If a memory-to-memory move would take MOVE_RATIO or more simple 1213 move-instruction sequences, we will do a movmem or libcall instead. */ 1214 1215 #ifndef MOVE_RATIO 1216 #if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti) 1217 #define MOVE_RATIO(speed) 2 1218 #else 1219 /* If we are optimizing for space (-Os), cut down the default move ratio. */ 1220 #define MOVE_RATIO(speed) ((speed) ? 15 : 3) 1221 #endif 1222 #endif 1223 1224 /* If a clear memory operation would take CLEAR_RATIO or more simple 1225 move-instruction sequences, we will do a setmem or libcall instead. */ 1226 1227 #ifndef CLEAR_RATIO 1228 #if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti) 1229 #define CLEAR_RATIO(speed) 2 1230 #else 1231 /* If we are optimizing for space, cut down the default clear ratio. */ 1232 #define CLEAR_RATIO(speed) ((speed) ? 15 :3) 1233 #endif 1234 #endif 1235 1236 /* If a memory set (to value other than zero) operation would take 1237 SET_RATIO or more simple move-instruction sequences, we will do a movmem 1238 or libcall instead. */ 1239 #ifndef SET_RATIO 1240 #define SET_RATIO(speed) MOVE_RATIO (speed) 1241 #endif 1242 1243 /* Supply a default definition for FUNCTION_ARG_PADDING: 1244 usually pad upward, but pad short args downward on 1245 big-endian machines. */ 1246 1247 #define DEFAULT_FUNCTION_ARG_PADDING(MODE, TYPE) \ 1248 (! BYTES_BIG_ENDIAN \ 1249 ? upward \ 1250 : (((MODE) == BLKmode \ 1251 ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST \ 1252 && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \ 1253 : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY) \ 1254 ? downward : upward)) 1255 1256 #ifndef FUNCTION_ARG_PADDING 1257 #define FUNCTION_ARG_PADDING(MODE, TYPE) \ 1258 DEFAULT_FUNCTION_ARG_PADDING ((MODE), (TYPE)) 1259 #endif 1260 1261 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save. 1262 Normally move_insn, so Pmode stack pointer. */ 1263 1264 #ifndef STACK_SAVEAREA_MODE 1265 #define STACK_SAVEAREA_MODE(LEVEL) Pmode 1266 #endif 1267 1268 /* Supply a default definition of STACK_SIZE_MODE for 1269 allocate_dynamic_stack_space. Normally PLUS/MINUS, so word_mode. */ 1270 1271 #ifndef STACK_SIZE_MODE 1272 #define STACK_SIZE_MODE word_mode 1273 #endif 1274 1275 /* Provide default values for the macros controlling stack checking. */ 1276 1277 /* The default is neither full builtin stack checking... */ 1278 #ifndef STACK_CHECK_BUILTIN 1279 #define STACK_CHECK_BUILTIN 0 1280 #endif 1281 1282 /* ...nor static builtin stack checking. */ 1283 #ifndef STACK_CHECK_STATIC_BUILTIN 1284 #define STACK_CHECK_STATIC_BUILTIN 0 1285 #endif 1286 1287 /* The default interval is one page (4096 bytes). */ 1288 #ifndef STACK_CHECK_PROBE_INTERVAL_EXP 1289 #define STACK_CHECK_PROBE_INTERVAL_EXP 12 1290 #endif 1291 1292 /* The default is not to move the stack pointer. */ 1293 #ifndef STACK_CHECK_MOVING_SP 1294 #define STACK_CHECK_MOVING_SP 0 1295 #endif 1296 1297 /* This is a kludge to try to capture the discrepancy between the old 1298 mechanism (generic stack checking) and the new mechanism (static 1299 builtin stack checking). STACK_CHECK_PROTECT needs to be bumped 1300 for the latter because part of the protection area is effectively 1301 included in STACK_CHECK_MAX_FRAME_SIZE for the former. */ 1302 #ifdef STACK_CHECK_PROTECT 1303 #define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT 1304 #else 1305 #define STACK_OLD_CHECK_PROTECT \ 1306 (targetm_common.except_unwind_info (&global_options) == UI_SJLJ \ 1307 ? 75 * UNITS_PER_WORD \ 1308 : 8 * 1024) 1309 #endif 1310 1311 /* Minimum amount of stack required to recover from an anticipated stack 1312 overflow detection. The default value conveys an estimate of the amount 1313 of stack required to propagate an exception. */ 1314 #ifndef STACK_CHECK_PROTECT 1315 #define STACK_CHECK_PROTECT \ 1316 (targetm_common.except_unwind_info (&global_options) == UI_SJLJ \ 1317 ? 75 * UNITS_PER_WORD \ 1318 : 12 * 1024) 1319 #endif 1320 1321 /* Make the maximum frame size be the largest we can and still only need 1322 one probe per function. */ 1323 #ifndef STACK_CHECK_MAX_FRAME_SIZE 1324 #define STACK_CHECK_MAX_FRAME_SIZE \ 1325 ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD) 1326 #endif 1327 1328 /* This is arbitrary, but should be large enough everywhere. */ 1329 #ifndef STACK_CHECK_FIXED_FRAME_SIZE 1330 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD) 1331 #endif 1332 1333 /* Provide a reasonable default for the maximum size of an object to 1334 allocate in the fixed frame. We may need to be able to make this 1335 controllable by the user at some point. */ 1336 #ifndef STACK_CHECK_MAX_VAR_SIZE 1337 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100) 1338 #endif 1339 1340 /* By default, the C++ compiler will use function addresses in the 1341 vtable entries. Setting this nonzero tells the compiler to use 1342 function descriptors instead. The value of this macro says how 1343 many words wide the descriptor is (normally 2). It is assumed 1344 that the address of a function descriptor may be treated as a 1345 pointer to a function. */ 1346 #ifndef TARGET_VTABLE_USES_DESCRIPTORS 1347 #define TARGET_VTABLE_USES_DESCRIPTORS 0 1348 #endif 1349 1350 #ifndef SWITCHABLE_TARGET 1351 #define SWITCHABLE_TARGET 0 1352 #endif 1353 1354 /* If the target supports integers that are wider than two 1355 HOST_WIDE_INTs on the host compiler, then the target should define 1356 TARGET_SUPPORTS_WIDE_INT and make the appropriate fixups. 1357 Otherwise the compiler really is not robust. */ 1358 #ifndef TARGET_SUPPORTS_WIDE_INT 1359 #define TARGET_SUPPORTS_WIDE_INT 0 1360 #endif 1361 1362 #endif /* GCC_INSN_FLAGS_H */ 1363 1364 #endif /* ! GCC_DEFAULTS_H */ 1365
Indexes created Tue May 05 00:25:04 UTC 2026