1 /* Definitions of various defaults for tm.h macros.
2 Copyright (C) 1992, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
3 Free Software Foundation, Inc.
4 Contributed by Ron Guilmette (rfg@monkeys.com)
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to the Free
20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
23 #ifndef GCC_DEFAULTS_H
24 #define GCC_DEFAULTS_H
26 #ifndef GET_ENVIRONMENT
27 #define GET_ENVIRONMENT(VALUE, NAME) do { (VALUE) = getenv (NAME); } while (0)
30 #define obstack_chunk_alloc ((void *(*) (long)) xmalloc)
31 #define obstack_chunk_free ((void (*) (void *)) free)
32 #define OBSTACK_CHUNK_SIZE 0
33 #define gcc_obstack_init(OBSTACK) \
34 _obstack_begin ((OBSTACK), OBSTACK_CHUNK_SIZE, 0, \
35 obstack_chunk_alloc, \
38 /* Define default standard character escape sequences. */
40 # define TARGET_BELL 007
41 # define TARGET_BS 010
42 # define TARGET_CR 015
43 # define TARGET_DIGIT0 060
44 # define TARGET_ESC 033
45 # define TARGET_FF 014
46 # define TARGET_NEWLINE 012
47 # define TARGET_TAB 011
48 # define TARGET_VT 013
51 /* Store in OUTPUT a string (made with alloca) containing an
52 assembler-name for a local static variable or function named NAME.
53 LABELNO is an integer which is different for each call. */
56 # ifndef NO_DOT_IN_LABEL
57 # define ASM_PN_FORMAT "%s.%lu"
59 # ifndef NO_DOLLAR_IN_LABEL
60 # define ASM_PN_FORMAT "%s$%lu"
62 # define ASM_PN_FORMAT "__%s_%lu"
65 #endif /* ! ASM_PN_FORMAT */
67 #ifndef ASM_FORMAT_PRIVATE_NAME
68 # define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
69 do { const char *const name_ = (NAME); \
70 char *const output_ = (OUTPUT) = \
71 (char *) alloca (strlen (name_) + 32); \
72 sprintf (output_, ASM_PN_FORMAT, name_, (unsigned long)(LABELNO)); \
76 /* This is how to output an element of a case-vector that is absolute.
77 Some targets don't use this, but we have to define it anyway. */
79 #ifndef ASM_OUTPUT_ADDR_VEC_ELT
80 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
81 do { fputs (integer_asm_op (POINTER_SIZE / BITS_PER_UNIT, TRUE), FILE); \
82 (*targetm.asm_out.internal_label) (FILE, "L", (VALUE)); \
87 /* Choose a reasonable default for ASM_OUTPUT_ASCII. */
89 #ifndef ASM_OUTPUT_ASCII
90 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
92 FILE *_hide_asm_out_file = (MYFILE); \
93 const unsigned char *_hide_p = (const unsigned char *) (MYSTRING); \
94 int _hide_thissize = (MYLENGTH); \
96 FILE *asm_out_file = _hide_asm_out_file; \
97 const unsigned char *p = _hide_p; \
98 int thissize = _hide_thissize; \
100 fprintf (asm_out_file, "\t.ascii \""); \
102 for (i = 0; i < thissize; i++) \
105 if (c == '\"' || c == '\\') \
106 putc ('\\', asm_out_file); \
108 putc (c, asm_out_file); \
111 fprintf (asm_out_file, "\\%o", c); \
112 /* After an octal-escape, if a digit follows, \
113 terminate one string constant and start another. \
114 The VAX assembler fails to stop reading the escape \
115 after three digits, so this is the only way we \
116 can get it to parse the data properly. */ \
117 if (i < thissize - 1 && ISDIGIT(p[i + 1])) \
118 fprintf (asm_out_file, "\"\n\t.ascii \""); \
121 fprintf (asm_out_file, "\"\n"); \
127 /* This is how we tell the assembler to equate two values. */
129 #ifndef ASM_OUTPUT_DEF
130 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
131 do { fprintf ((FILE), "%s", SET_ASM_OP); \
132 assemble_name (FILE, LABEL1); \
133 fprintf (FILE, ","); \
134 assemble_name (FILE, LABEL2); \
135 fprintf (FILE, "\n"); \
140 /* This is how to output the definition of a user-level label named
141 NAME, such as the label on a static function or variable NAME. */
143 #ifndef ASM_OUTPUT_LABEL
144 #define ASM_OUTPUT_LABEL(FILE,NAME) \
145 do { assemble_name ((FILE), (NAME)); fputs (":\n", (FILE)); } while (0)
148 /* This is how to output a reference to a user-level label named NAME. */
150 #ifndef ASM_OUTPUT_LABELREF
151 #define ASM_OUTPUT_LABELREF(FILE,NAME) asm_fprintf ((FILE), "%U%s", (NAME))
154 /* Allow target to print debug info labels specially. This is useful for
155 VLIW targets, since debug info labels should go into the middle of
156 instruction bundles instead of breaking them. */
158 #ifndef ASM_OUTPUT_DEBUG_LABEL
159 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
160 (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM)
163 /* This is how we tell the assembler that a symbol is weak. */
164 #ifndef ASM_OUTPUT_WEAK_ALIAS
165 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
166 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE) \
169 ASM_WEAKEN_LABEL (STREAM, NAME); \
171 ASM_OUTPUT_DEF (STREAM, NAME, VALUE); \
177 /* How to emit a .type directive. */
178 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE
179 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT
180 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE) \
183 fputs (TYPE_ASM_OP, STREAM); \
184 assemble_name (STREAM, NAME); \
185 fputs (", ", STREAM); \
186 fprintf (STREAM, TYPE_OPERAND_FMT, TYPE); \
187 putc ('\n', STREAM); \
193 /* How to emit a .size directive. */
194 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE
196 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE) \
199 HOST_WIDE_INT size_ = (SIZE); \
200 fputs (SIZE_ASM_OP, STREAM); \
201 assemble_name (STREAM, NAME); \
202 fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \
206 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME) \
209 fputs (SIZE_ASM_OP, STREAM); \
210 assemble_name (STREAM, NAME); \
211 fputs (", .-", STREAM); \
212 assemble_name (STREAM, NAME); \
213 putc ('\n', STREAM); \
220 /* This determines whether or not we support weak symbols. */
221 #ifndef SUPPORTS_WEAK
222 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
223 #define SUPPORTS_WEAK 1
225 #define SUPPORTS_WEAK 0
229 /* This determines whether or not we support link-once semantics. */
230 #ifndef SUPPORTS_ONE_ONLY
231 #ifdef MAKE_DECL_ONE_ONLY
232 #define SUPPORTS_ONE_ONLY 1
234 #define SUPPORTS_ONE_ONLY 0
238 /* This determines whether weak symbols must be left out of a static
239 archive's table of contents. Defining this macro to be nonzero has
240 the consequence that certain symbols will not be made weak that
241 otherwise would be. The C++ ABI requires this macro to be zero;
242 see the documentation. */
243 #ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
244 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
247 /* This determines whether or not we need linkonce unwind information. */
248 #ifndef TARGET_USES_WEAK_UNWIND_INFO
249 #define TARGET_USES_WEAK_UNWIND_INFO 0
252 /* By default, there is no prefix on user-defined symbols. */
253 #ifndef USER_LABEL_PREFIX
254 #define USER_LABEL_PREFIX ""
257 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
258 provide a weak attribute. Else define it to nothing.
260 This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
261 not available at that time.
263 Note, this is only for use by target files which we know are to be
265 #ifndef TARGET_ATTRIBUTE_WEAK
267 # define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
269 # define TARGET_ATTRIBUTE_WEAK
273 /* Determines whether we may use common symbols to represent one-only
274 semantics (a.k.a. "vague linkage"). */
275 #ifndef USE_COMMON_FOR_ONE_ONLY
276 # define USE_COMMON_FOR_ONE_ONLY 1
279 /* By default we can assume that all global symbols are in one namespace,
280 across all shared libraries. */
281 #ifndef MULTIPLE_SYMBOL_SPACES
282 # define MULTIPLE_SYMBOL_SPACES 0
285 /* If the target supports init_priority C++ attribute, give
286 SUPPORTS_INIT_PRIORITY a nonzero value. */
287 #ifndef SUPPORTS_INIT_PRIORITY
288 #define SUPPORTS_INIT_PRIORITY 1
289 #endif /* SUPPORTS_INIT_PRIORITY */
291 /* If duplicate library search directories can be removed from a
292 linker command without changing the linker's semantics, give this
294 #ifndef LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
295 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 0
296 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
298 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
299 the rest of the DWARF 2 frame unwind support is also provided. */
300 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
301 #define DWARF2_UNWIND_INFO 1
304 /* If we have named sections, and we're using crtstuff to run ctors,
305 use them for registering eh frame information. */
306 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
307 && !defined(EH_FRAME_IN_DATA_SECTION)
308 #ifndef EH_FRAME_SECTION_NAME
309 #define EH_FRAME_SECTION_NAME ".eh_frame"
313 /* On many systems, different EH table encodings are used under
314 difference circumstances. Some will require runtime relocations;
315 some will not. For those that do not require runtime relocations,
316 we would like to make the table read-only. However, since the
317 read-only tables may need to be combined with read-write tables
318 that do require runtime relocation, it is not safe to make the
319 tables read-only unless the linker will merge read-only and
320 read-write sections into a single read-write section. If your
321 linker does not have this ability, but your system is such that no
322 encoding used with non-PIC code will ever require a runtime
323 relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in
324 your target configuration file. */
325 #ifndef EH_TABLES_CAN_BE_READ_ONLY
326 #ifdef HAVE_LD_RO_RW_SECTION_MIXING
327 #define EH_TABLES_CAN_BE_READ_ONLY 1
329 #define EH_TABLES_CAN_BE_READ_ONLY 0
333 /* If we have named section and we support weak symbols, then use the
334 .jcr section for recording java classes which need to be registered
335 at program start-up time. */
336 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
337 #ifndef JCR_SECTION_NAME
338 #define JCR_SECTION_NAME ".jcr"
342 /* This decision to use a .jcr section can be overridden by defining
343 USE_JCR_SECTION to 0 in target file. This is necessary if target
344 can define JCR_SECTION_NAME but does not have crtstuff or
345 linker support for .jcr section. */
346 #ifndef TARGET_USE_JCR_SECTION
347 #ifdef JCR_SECTION_NAME
348 #define TARGET_USE_JCR_SECTION 1
350 #define TARGET_USE_JCR_SECTION 0
354 /* Number of hardware registers that go into the DWARF-2 unwind info.
355 If not defined, equals FIRST_PSEUDO_REGISTER */
357 #ifndef DWARF_FRAME_REGISTERS
358 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
361 /* How to renumber registers for dbx and gdb. If not defined, assume
362 no renumbering is necessary. */
364 #ifndef DBX_REGISTER_NUMBER
365 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
368 /* Default sizes for base C types. If the sizes are different for
369 your target, you should override these values by defining the
370 appropriate symbols in your tm.h file. */
372 #ifndef BITS_PER_UNIT
373 #define BITS_PER_UNIT 8
376 #ifndef BITS_PER_WORD
377 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
380 #ifndef CHAR_TYPE_SIZE
381 #define CHAR_TYPE_SIZE BITS_PER_UNIT
384 #ifndef BOOL_TYPE_SIZE
385 /* `bool' has size and alignment `1', on almost all platforms. */
386 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
389 #ifndef SHORT_TYPE_SIZE
390 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
393 #ifndef INT_TYPE_SIZE
394 #define INT_TYPE_SIZE BITS_PER_WORD
397 #ifndef LONG_TYPE_SIZE
398 #define LONG_TYPE_SIZE BITS_PER_WORD
401 #ifndef LONG_LONG_TYPE_SIZE
402 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
405 #ifndef WCHAR_TYPE_SIZE
406 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
409 #ifndef FLOAT_TYPE_SIZE
410 #define FLOAT_TYPE_SIZE BITS_PER_WORD
413 #ifndef DOUBLE_TYPE_SIZE
414 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
417 #ifndef LONG_DOUBLE_TYPE_SIZE
418 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
421 /* Width in bits of a pointer. Mind the value of the macro `Pmode'. */
423 #define POINTER_SIZE BITS_PER_WORD
426 #ifndef PIC_OFFSET_TABLE_REGNUM
427 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
430 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
431 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
434 #ifndef TARGET_DECLSPEC
435 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
436 /* If the target supports the "dllimport" attribute, users are
437 probably used to the "__declspec" syntax. */
438 #define TARGET_DECLSPEC 1
440 #define TARGET_DECLSPEC 0
444 /* By default, the preprocessor should be invoked the same way in C++
446 #ifndef CPLUSPLUS_CPP_SPEC
448 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
452 #ifndef ACCUMULATE_OUTGOING_ARGS
453 #define ACCUMULATE_OUTGOING_ARGS 0
456 /* Supply a default definition for PUSH_ARGS. */
459 #define PUSH_ARGS !ACCUMULATE_OUTGOING_ARGS
465 /* Decide whether a function's arguments should be processed
466 from first to last or from last to first.
468 They should if the stack and args grow in opposite directions, but
469 only if we have push insns. */
473 #ifndef PUSH_ARGS_REVERSED
474 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
475 #define PUSH_ARGS_REVERSED PUSH_ARGS
481 #ifndef PUSH_ARGS_REVERSED
482 #define PUSH_ARGS_REVERSED 0
485 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
486 STACK_BOUNDARY is required. */
487 #ifndef PREFERRED_STACK_BOUNDARY
488 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
491 #ifndef TARGET_DEFAULT_PACK_STRUCT
492 #define TARGET_DEFAULT_PACK_STRUCT 0
495 /* By default, the C++ compiler will use function addresses in the
496 vtable entries. Setting this nonzero tells the compiler to use
497 function descriptors instead. The value of this macro says how
498 many words wide the descriptor is (normally 2). It is assumed
499 that the address of a function descriptor may be treated as a
500 pointer to a function. */
501 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
502 #define TARGET_VTABLE_USES_DESCRIPTORS 0
505 /* By default, the vtable entries are void pointers, the so the alignment
506 is the same as pointer alignment. The value of this macro specifies
507 the alignment of the vtable entry in bits. It should be defined only
508 when special alignment is necessary. */
509 #ifndef TARGET_VTABLE_ENTRY_ALIGN
510 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
513 /* There are a few non-descriptor entries in the vtable at offsets below
514 zero. If these entries must be padded (say, to preserve the alignment
515 specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
516 words in each data entry. */
517 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
518 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
521 /* Decide whether it is safe to use a local alias for a virtual function
522 when constructing thunks. */
523 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
524 #ifdef ASM_OUTPUT_DEF
525 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
527 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
531 /* Select a format to encode pointers in exception handling data. We
532 prefer those that result in fewer dynamic relocations. Assume no
533 special support here and encode direct references. */
534 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
535 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) DW_EH_PE_absptr
538 /* By default, the C++ compiler will use the lowest bit of the pointer
539 to function to indicate a pointer-to-member-function points to a
540 virtual member function. However, if FUNCTION_BOUNDARY indicates
541 function addresses aren't always even, the lowest bit of the delta
542 field will be used. */
543 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
544 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
545 (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
546 ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
549 #ifndef DEFAULT_GDB_EXTENSIONS
550 #define DEFAULT_GDB_EXTENSIONS 1
553 /* If more than one debugging type is supported, you must define
554 PREFERRED_DEBUGGING_TYPE to choose the default. */
556 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
557 + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
558 + defined (VMS_DEBUGGING_INFO))
559 #ifndef PREFERRED_DEBUGGING_TYPE
560 #error You must define PREFERRED_DEBUGGING_TYPE
561 #endif /* no PREFERRED_DEBUGGING_TYPE */
563 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
564 here so other code needn't care. */
565 #elif defined DBX_DEBUGGING_INFO
566 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
568 #elif defined SDB_DEBUGGING_INFO
569 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
571 #elif defined DWARF2_DEBUGGING_INFO
572 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
574 #elif defined VMS_DEBUGGING_INFO
575 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
577 #elif defined XCOFF_DEBUGGING_INFO
578 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
581 /* No debugging format is supported by this target. */
582 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
585 /* Define codes for all the float formats that we know of. */
586 #define UNKNOWN_FLOAT_FORMAT 0
587 #define IEEE_FLOAT_FORMAT 1
588 #define VAX_FLOAT_FORMAT 2
589 #define IBM_FLOAT_FORMAT 3
590 #define C4X_FLOAT_FORMAT 4
592 /* Default to IEEE float if not specified. Nearly all machines use it. */
593 #ifndef TARGET_FLOAT_FORMAT
594 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
597 /* Some macros can be defined by the backend in either a mode-dependent
598 or mode-independent form. The compiler proper should only use the
599 mode-dependent form, providing VOIDmode when the mode is unknown.
600 We can't poison the macros because the backend may reference them. */
602 #ifndef REGNO_MODE_OK_FOR_BASE_P
603 #define REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) REGNO_OK_FOR_BASE_P (REGNO)
606 #ifndef REG_MODE_OK_FOR_BASE_P
607 #define REG_MODE_OK_FOR_BASE_P(REG, MODE) REG_OK_FOR_BASE_P (REG)
610 /* Determine the register class for registers suitable to be the base
611 address register in a MEM. Allow the choice to be dependent upon
612 the mode of the memory access. */
613 #ifndef MODE_BASE_REG_CLASS
614 #define MODE_BASE_REG_CLASS(MODE) BASE_REG_CLASS
617 /* Some machines require a different base register class if the index
618 is a register. By default, assume that a base register is acceptable. */
619 #ifndef MODE_BASE_REG_REG_CLASS
620 #define MODE_BASE_REG_REG_CLASS(MODE) MODE_BASE_REG_CLASS(MODE)
623 #ifndef REGNO_MODE_OK_FOR_REG_BASE_P
624 #define REGNO_MODE_OK_FOR_REG_BASE_P(REGNO, MODE) REGNO_MODE_OK_FOR_BASE_P (REGNO, MODE)
627 #ifndef REG_MODE_OK_FOR_REG_BASE_P
628 #define REG_MODE_OK_FOR_REG_BASE_P(REGNO, MODE) REG_MODE_OK_FOR_BASE_P (REGNO, MODE)
631 #ifndef LARGEST_EXPONENT_IS_NORMAL
632 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
635 #ifndef ROUND_TOWARDS_ZERO
636 #define ROUND_TOWARDS_ZERO 0
639 #ifndef MODE_HAS_NANS
640 #define MODE_HAS_NANS(MODE) \
641 (FLOAT_MODE_P (MODE) \
642 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
643 && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
646 #ifndef MODE_HAS_INFINITIES
647 #define MODE_HAS_INFINITIES(MODE) \
648 (FLOAT_MODE_P (MODE) \
649 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
650 && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
653 #ifndef MODE_HAS_SIGNED_ZEROS
654 #define MODE_HAS_SIGNED_ZEROS(MODE) \
655 (FLOAT_MODE_P (MODE) && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT)
658 #ifndef MODE_HAS_SIGN_DEPENDENT_ROUNDING
659 #define MODE_HAS_SIGN_DEPENDENT_ROUNDING(MODE) \
660 (FLOAT_MODE_P (MODE) \
661 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
662 && !ROUND_TOWARDS_ZERO)
665 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
666 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
669 /* True if the targets integer-comparison functions return { 0, 1, 2
670 } to indicate { <, ==, > }. False if { -1, 0, 1 } is used
671 instead. The libgcc routines are biased. */
672 #ifndef TARGET_LIB_INT_CMP_BIASED
673 #define TARGET_LIB_INT_CMP_BIASED (true)
676 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
677 then the word-endianness is the same as for integers. */
678 #ifndef FLOAT_WORDS_BIG_ENDIAN
679 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
682 #ifndef TARGET_FLT_EVAL_METHOD
683 #define TARGET_FLT_EVAL_METHOD 0
686 #ifndef HOT_TEXT_SECTION_NAME
687 #define HOT_TEXT_SECTION_NAME ".text.hot"
690 #ifndef UNLIKELY_EXECUTED_TEXT_SECTION_NAME
691 #define UNLIKELY_EXECUTED_TEXT_SECTION_NAME ".text.unlikely"
694 #ifndef HAS_LONG_COND_BRANCH
695 #define HAS_LONG_COND_BRANCH 0
698 #ifndef HAS_LONG_UNCOND_BRANCH
699 #define HAS_LONG_UNCOND_BRANCH 0
702 #ifndef UNITS_PER_SIMD_WORD
703 #define UNITS_PER_SIMD_WORD 0
706 /* Determine whether __cxa_atexit, rather than atexit, is used to
707 register C++ destructors for local statics and global objects. */
708 #ifndef DEFAULT_USE_CXA_ATEXIT
709 #define DEFAULT_USE_CXA_ATEXIT 0
712 /* Determine whether extra constraint letter should be handled
713 via address reload (like 'o'). */
714 #ifndef EXTRA_MEMORY_CONSTRAINT
715 #define EXTRA_MEMORY_CONSTRAINT(C,STR) 0
718 /* Determine whether extra constraint letter should be handled
719 as an address (like 'p'). */
720 #ifndef EXTRA_ADDRESS_CONSTRAINT
721 #define EXTRA_ADDRESS_CONSTRAINT(C,STR) 0
724 /* When a port defines CONSTRAINT_LEN, it should use DEFAULT_CONSTRAINT_LEN
725 for all the characters that it does not want to change, so things like the
726 'length' of a digit in a matching constraint is an implementation detail,
727 and not part of the interface. */
728 #define DEFAULT_CONSTRAINT_LEN(C,STR) 1
730 #ifndef CONSTRAINT_LEN
731 #define CONSTRAINT_LEN(C,STR) DEFAULT_CONSTRAINT_LEN (C, STR)
734 #if defined (CONST_OK_FOR_LETTER_P) && ! defined (CONST_OK_FOR_CONSTRAINT_P)
735 #define CONST_OK_FOR_CONSTRAINT_P(VAL,C,STR) CONST_OK_FOR_LETTER_P (VAL, C)
738 #if defined (CONST_DOUBLE_OK_FOR_LETTER_P) && ! defined (CONST_DOUBLE_OK_FOR_CONSTRAINT_P)
739 #define CONST_DOUBLE_OK_FOR_CONSTRAINT_P(OP,C,STR) \
740 CONST_DOUBLE_OK_FOR_LETTER_P (OP, C)
743 #ifndef REG_CLASS_FROM_CONSTRAINT
744 #define REG_CLASS_FROM_CONSTRAINT(C,STR) REG_CLASS_FROM_LETTER (C)
747 #if defined (EXTRA_CONSTRAINT) && ! defined (EXTRA_CONSTRAINT_STR)
748 #define EXTRA_CONSTRAINT_STR(OP, C,STR) EXTRA_CONSTRAINT (OP, C)
751 #ifndef REGISTER_MOVE_COST
752 #define REGISTER_MOVE_COST(m, x, y) 2
755 /* Determine whether the the entire c99 runtime
756 is present in the runtime library. */
757 #ifndef TARGET_C99_FUNCTIONS
758 #define TARGET_C99_FUNCTIONS 0
761 /* Indicate that CLZ and CTZ are undefined at zero. */
762 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
763 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
765 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
766 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
769 /* Provide a default value for STORE_FLAG_VALUE. */
770 #ifndef STORE_FLAG_VALUE
771 #define STORE_FLAG_VALUE 1
774 /* This macro is used to determine what the largest unit size that
775 move_by_pieces can use is. */
777 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
778 move efficiently, as opposed to MOVE_MAX which is the maximum
779 number of bytes we can move with a single instruction. */
781 #ifndef MOVE_MAX_PIECES
782 #define MOVE_MAX_PIECES MOVE_MAX
785 #ifndef STACK_POINTER_OFFSET
786 #define STACK_POINTER_OFFSET 0
790 #define LOCAL_REGNO(REGNO) 0
793 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
794 the stack pointer does not matter. The value is tested only in
795 functions that have frame pointers. */
796 #ifndef EXIT_IGNORE_STACK
797 #define EXIT_IGNORE_STACK 0
800 /* Assume that case vectors are not pc-relative. */
801 #ifndef CASE_VECTOR_PC_RELATIVE
802 #define CASE_VECTOR_PC_RELATIVE 0
805 /* Assume that trampolines need function alignment. */
806 #ifndef TRAMPOLINE_ALIGNMENT
807 #define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY
810 /* Register mappings for target machines without register windows. */
811 #ifndef INCOMING_REGNO
812 #define INCOMING_REGNO(N) (N)
815 #ifndef OUTGOING_REGNO
816 #define OUTGOING_REGNO(N) (N)
819 #ifndef SHIFT_COUNT_TRUNCATED
820 #define SHIFT_COUNT_TRUNCATED 0
823 #ifndef LEGITIMIZE_ADDRESS
824 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)
827 #ifndef LEGITIMATE_PIC_OPERAND_P
828 #define LEGITIMATE_PIC_OPERAND_P(X) 1
831 #ifndef REVERSIBLE_CC_MODE
832 #define REVERSIBLE_CC_MODE(MODE) 0
835 /* Biggest alignment supported by the object file format of this machine. */
836 #ifndef MAX_OFILE_ALIGNMENT
837 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
840 #endif /* ! GCC_DEFAULTS_H */