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 /* Decide whether to defer emitting the assembler output for an equate
141 of two values. The default is to not defer output. */
142 #ifndef TARGET_DEFERRED_OUTPUT_DEFS
143 #define TARGET_DEFERRED_OUTPUT_DEFS(DECL,TARGET) false
146 /* This is how to output the definition of a user-level label named
147 NAME, such as the label on a static function or variable NAME. */
149 #ifndef ASM_OUTPUT_LABEL
150 #define ASM_OUTPUT_LABEL(FILE,NAME) \
151 do { assemble_name ((FILE), (NAME)); fputs (":\n", (FILE)); } while (0)
154 /* Output the definition of a compiler-generated label named NAME. */
155 #ifndef ASM_OUTPUT_INTERNAL_LABEL
156 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,NAME) \
158 assemble_name_raw ((FILE), (NAME)); \
159 fputs (":\n", (FILE)); \
163 /* This is how to output a reference to a user-level label named NAME. */
165 #ifndef ASM_OUTPUT_LABELREF
166 #define ASM_OUTPUT_LABELREF(FILE,NAME) asm_fprintf ((FILE), "%U%s", (NAME))
169 /* Allow target to print debug info labels specially. This is useful for
170 VLIW targets, since debug info labels should go into the middle of
171 instruction bundles instead of breaking them. */
173 #ifndef ASM_OUTPUT_DEBUG_LABEL
174 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
175 (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM)
178 /* This is how we tell the assembler that a symbol is weak. */
179 #ifndef ASM_OUTPUT_WEAK_ALIAS
180 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
181 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE) \
184 ASM_WEAKEN_LABEL (STREAM, NAME); \
186 ASM_OUTPUT_DEF (STREAM, NAME, VALUE); \
192 /* How to emit a .type directive. */
193 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE
194 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT
195 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE) \
198 fputs (TYPE_ASM_OP, STREAM); \
199 assemble_name (STREAM, NAME); \
200 fputs (", ", STREAM); \
201 fprintf (STREAM, TYPE_OPERAND_FMT, TYPE); \
202 putc ('\n', STREAM); \
208 /* How to emit a .size directive. */
209 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE
211 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE) \
214 HOST_WIDE_INT size_ = (SIZE); \
215 fputs (SIZE_ASM_OP, STREAM); \
216 assemble_name (STREAM, NAME); \
217 fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \
221 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME) \
224 fputs (SIZE_ASM_OP, STREAM); \
225 assemble_name (STREAM, NAME); \
226 fputs (", .-", STREAM); \
227 assemble_name (STREAM, NAME); \
228 putc ('\n', STREAM); \
235 /* This determines whether or not we support weak symbols. */
236 #ifndef SUPPORTS_WEAK
237 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
238 #define SUPPORTS_WEAK 1
240 #define SUPPORTS_WEAK 0
244 /* This determines whether or not we support link-once semantics. */
245 #ifndef SUPPORTS_ONE_ONLY
246 #ifdef MAKE_DECL_ONE_ONLY
247 #define SUPPORTS_ONE_ONLY 1
249 #define SUPPORTS_ONE_ONLY 0
253 /* This determines whether weak symbols must be left out of a static
254 archive's table of contents. Defining this macro to be nonzero has
255 the consequence that certain symbols will not be made weak that
256 otherwise would be. The C++ ABI requires this macro to be zero;
257 see the documentation. */
258 #ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
259 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
262 /* This determines whether or not we need linkonce unwind information. */
263 #ifndef TARGET_USES_WEAK_UNWIND_INFO
264 #define TARGET_USES_WEAK_UNWIND_INFO 0
267 /* By default, there is no prefix on user-defined symbols. */
268 #ifndef USER_LABEL_PREFIX
269 #define USER_LABEL_PREFIX ""
272 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
273 provide a weak attribute. Else define it to nothing.
275 This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
276 not available at that time.
278 Note, this is only for use by target files which we know are to be
280 #ifndef TARGET_ATTRIBUTE_WEAK
282 # define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
284 # define TARGET_ATTRIBUTE_WEAK
288 /* Determines whether we may use common symbols to represent one-only
289 semantics (a.k.a. "vague linkage"). */
290 #ifndef USE_COMMON_FOR_ONE_ONLY
291 # define USE_COMMON_FOR_ONE_ONLY 1
294 /* By default we can assume that all global symbols are in one namespace,
295 across all shared libraries. */
296 #ifndef MULTIPLE_SYMBOL_SPACES
297 # define MULTIPLE_SYMBOL_SPACES 0
300 /* If the target supports init_priority C++ attribute, give
301 SUPPORTS_INIT_PRIORITY a nonzero value. */
302 #ifndef SUPPORTS_INIT_PRIORITY
303 #define SUPPORTS_INIT_PRIORITY 1
304 #endif /* SUPPORTS_INIT_PRIORITY */
306 /* If duplicate library search directories can be removed from a
307 linker command without changing the linker's semantics, give this
309 #ifndef LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
310 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 0
311 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
313 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
314 the rest of the DWARF 2 frame unwind support is also provided. */
315 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
316 #define DWARF2_UNWIND_INFO 1
319 /* If we have named sections, and we're using crtstuff to run ctors,
320 use them for registering eh frame information. */
321 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
322 && !defined(EH_FRAME_IN_DATA_SECTION)
323 #ifndef EH_FRAME_SECTION_NAME
324 #define EH_FRAME_SECTION_NAME ".eh_frame"
328 /* On many systems, different EH table encodings are used under
329 difference circumstances. Some will require runtime relocations;
330 some will not. For those that do not require runtime relocations,
331 we would like to make the table read-only. However, since the
332 read-only tables may need to be combined with read-write tables
333 that do require runtime relocation, it is not safe to make the
334 tables read-only unless the linker will merge read-only and
335 read-write sections into a single read-write section. If your
336 linker does not have this ability, but your system is such that no
337 encoding used with non-PIC code will ever require a runtime
338 relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in
339 your target configuration file. */
340 #ifndef EH_TABLES_CAN_BE_READ_ONLY
341 #ifdef HAVE_LD_RO_RW_SECTION_MIXING
342 #define EH_TABLES_CAN_BE_READ_ONLY 1
344 #define EH_TABLES_CAN_BE_READ_ONLY 0
348 /* If we have named section and we support weak symbols, then use the
349 .jcr section for recording java classes which need to be registered
350 at program start-up time. */
351 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
352 #ifndef JCR_SECTION_NAME
353 #define JCR_SECTION_NAME ".jcr"
357 /* This decision to use a .jcr section can be overridden by defining
358 USE_JCR_SECTION to 0 in target file. This is necessary if target
359 can define JCR_SECTION_NAME but does not have crtstuff or
360 linker support for .jcr section. */
361 #ifndef TARGET_USE_JCR_SECTION
362 #ifdef JCR_SECTION_NAME
363 #define TARGET_USE_JCR_SECTION 1
365 #define TARGET_USE_JCR_SECTION 0
369 /* Number of hardware registers that go into the DWARF-2 unwind info.
370 If not defined, equals FIRST_PSEUDO_REGISTER */
372 #ifndef DWARF_FRAME_REGISTERS
373 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
376 /* How to renumber registers for dbx and gdb. If not defined, assume
377 no renumbering is necessary. */
379 #ifndef DBX_REGISTER_NUMBER
380 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
383 /* Default sizes for base C types. If the sizes are different for
384 your target, you should override these values by defining the
385 appropriate symbols in your tm.h file. */
387 #ifndef BITS_PER_UNIT
388 #define BITS_PER_UNIT 8
391 #ifndef BITS_PER_WORD
392 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
395 #ifndef CHAR_TYPE_SIZE
396 #define CHAR_TYPE_SIZE BITS_PER_UNIT
399 #ifndef BOOL_TYPE_SIZE
400 /* `bool' has size and alignment `1', on almost all platforms. */
401 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
404 #ifndef SHORT_TYPE_SIZE
405 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
408 #ifndef INT_TYPE_SIZE
409 #define INT_TYPE_SIZE BITS_PER_WORD
412 #ifndef LONG_TYPE_SIZE
413 #define LONG_TYPE_SIZE BITS_PER_WORD
416 #ifndef LONG_LONG_TYPE_SIZE
417 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
420 #ifndef WCHAR_TYPE_SIZE
421 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
424 #ifndef FLOAT_TYPE_SIZE
425 #define FLOAT_TYPE_SIZE BITS_PER_WORD
428 #ifndef DOUBLE_TYPE_SIZE
429 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
432 #ifndef LONG_DOUBLE_TYPE_SIZE
433 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
436 /* Width in bits of a pointer. Mind the value of the macro `Pmode'. */
438 #define POINTER_SIZE BITS_PER_WORD
441 #ifndef PIC_OFFSET_TABLE_REGNUM
442 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
445 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
446 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
449 #ifndef TARGET_DECLSPEC
450 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
451 /* If the target supports the "dllimport" attribute, users are
452 probably used to the "__declspec" syntax. */
453 #define TARGET_DECLSPEC 1
455 #define TARGET_DECLSPEC 0
459 /* By default, the preprocessor should be invoked the same way in C++
461 #ifndef CPLUSPLUS_CPP_SPEC
463 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
467 #ifndef ACCUMULATE_OUTGOING_ARGS
468 #define ACCUMULATE_OUTGOING_ARGS 0
471 /* Supply a default definition for PUSH_ARGS. */
474 #define PUSH_ARGS !ACCUMULATE_OUTGOING_ARGS
480 /* Decide whether a function's arguments should be processed
481 from first to last or from last to first.
483 They should if the stack and args grow in opposite directions, but
484 only if we have push insns. */
488 #ifndef PUSH_ARGS_REVERSED
489 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
490 #define PUSH_ARGS_REVERSED PUSH_ARGS
496 #ifndef PUSH_ARGS_REVERSED
497 #define PUSH_ARGS_REVERSED 0
500 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
501 STACK_BOUNDARY is required. */
502 #ifndef PREFERRED_STACK_BOUNDARY
503 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
506 #ifndef TARGET_DEFAULT_PACK_STRUCT
507 #define TARGET_DEFAULT_PACK_STRUCT 0
510 /* By default, the C++ compiler will use function addresses in the
511 vtable entries. Setting this nonzero tells the compiler to use
512 function descriptors instead. The value of this macro says how
513 many words wide the descriptor is (normally 2). It is assumed
514 that the address of a function descriptor may be treated as a
515 pointer to a function. */
516 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
517 #define TARGET_VTABLE_USES_DESCRIPTORS 0
520 /* By default, the vtable entries are void pointers, the so the alignment
521 is the same as pointer alignment. The value of this macro specifies
522 the alignment of the vtable entry in bits. It should be defined only
523 when special alignment is necessary. */
524 #ifndef TARGET_VTABLE_ENTRY_ALIGN
525 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
528 /* There are a few non-descriptor entries in the vtable at offsets below
529 zero. If these entries must be padded (say, to preserve the alignment
530 specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
531 words in each data entry. */
532 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
533 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
536 /* Decide whether it is safe to use a local alias for a virtual function
537 when constructing thunks. */
538 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
539 #ifdef ASM_OUTPUT_DEF
540 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
542 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
546 /* Select a format to encode pointers in exception handling data. We
547 prefer those that result in fewer dynamic relocations. Assume no
548 special support here and encode direct references. */
549 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
550 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) DW_EH_PE_absptr
553 /* By default, the C++ compiler will use the lowest bit of the pointer
554 to function to indicate a pointer-to-member-function points to a
555 virtual member function. However, if FUNCTION_BOUNDARY indicates
556 function addresses aren't always even, the lowest bit of the delta
557 field will be used. */
558 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
559 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
560 (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
561 ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
564 #ifndef DEFAULT_GDB_EXTENSIONS
565 #define DEFAULT_GDB_EXTENSIONS 1
568 /* If more than one debugging type is supported, you must define
569 PREFERRED_DEBUGGING_TYPE to choose the default. */
571 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
572 + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
573 + defined (VMS_DEBUGGING_INFO))
574 #ifndef PREFERRED_DEBUGGING_TYPE
575 #error You must define PREFERRED_DEBUGGING_TYPE
576 #endif /* no PREFERRED_DEBUGGING_TYPE */
578 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
579 here so other code needn't care. */
580 #elif defined DBX_DEBUGGING_INFO
581 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
583 #elif defined SDB_DEBUGGING_INFO
584 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
586 #elif defined DWARF2_DEBUGGING_INFO
587 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
589 #elif defined VMS_DEBUGGING_INFO
590 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
592 #elif defined XCOFF_DEBUGGING_INFO
593 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
596 /* No debugging format is supported by this target. */
597 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
600 /* Define codes for all the float formats that we know of. */
601 #define UNKNOWN_FLOAT_FORMAT 0
602 #define IEEE_FLOAT_FORMAT 1
603 #define VAX_FLOAT_FORMAT 2
604 #define IBM_FLOAT_FORMAT 3
605 #define C4X_FLOAT_FORMAT 4
607 /* Default to IEEE float if not specified. Nearly all machines use it. */
608 #ifndef TARGET_FLOAT_FORMAT
609 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
612 /* Some macros can be defined by the backend in either a mode-dependent
613 or mode-independent form. The compiler proper should only use the
614 mode-dependent form, providing VOIDmode when the mode is unknown.
615 We can't poison the macros because the backend may reference them. */
617 #ifndef REGNO_MODE_OK_FOR_BASE_P
618 #define REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) REGNO_OK_FOR_BASE_P (REGNO)
621 #ifndef REG_MODE_OK_FOR_BASE_P
622 #define REG_MODE_OK_FOR_BASE_P(REG, MODE) REG_OK_FOR_BASE_P (REG)
625 /* Determine the register class for registers suitable to be the base
626 address register in a MEM. Allow the choice to be dependent upon
627 the mode of the memory access. */
628 #ifndef MODE_BASE_REG_CLASS
629 #define MODE_BASE_REG_CLASS(MODE) BASE_REG_CLASS
632 /* Some machines require a different base register class if the index
633 is a register. By default, assume that a base register is acceptable. */
634 #ifndef MODE_BASE_REG_REG_CLASS
635 #define MODE_BASE_REG_REG_CLASS(MODE) MODE_BASE_REG_CLASS(MODE)
638 #ifndef REGNO_MODE_OK_FOR_REG_BASE_P
639 #define REGNO_MODE_OK_FOR_REG_BASE_P(REGNO, MODE) REGNO_MODE_OK_FOR_BASE_P (REGNO, MODE)
642 #ifndef REG_MODE_OK_FOR_REG_BASE_P
643 #define REG_MODE_OK_FOR_REG_BASE_P(REGNO, MODE) REG_MODE_OK_FOR_BASE_P (REGNO, MODE)
646 #ifndef LARGEST_EXPONENT_IS_NORMAL
647 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
650 #ifndef ROUND_TOWARDS_ZERO
651 #define ROUND_TOWARDS_ZERO 0
654 #ifndef MODE_HAS_NANS
655 #define MODE_HAS_NANS(MODE) \
656 (FLOAT_MODE_P (MODE) \
657 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
658 && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
661 #ifndef MODE_HAS_INFINITIES
662 #define MODE_HAS_INFINITIES(MODE) \
663 (FLOAT_MODE_P (MODE) \
664 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
665 && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
668 #ifndef MODE_HAS_SIGNED_ZEROS
669 #define MODE_HAS_SIGNED_ZEROS(MODE) \
670 (FLOAT_MODE_P (MODE) && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT)
673 #ifndef MODE_HAS_SIGN_DEPENDENT_ROUNDING
674 #define MODE_HAS_SIGN_DEPENDENT_ROUNDING(MODE) \
675 (FLOAT_MODE_P (MODE) \
676 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
677 && !ROUND_TOWARDS_ZERO)
680 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
681 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
684 /* True if the targets integer-comparison functions return { 0, 1, 2
685 } to indicate { <, ==, > }. False if { -1, 0, 1 } is used
686 instead. The libgcc routines are biased. */
687 #ifndef TARGET_LIB_INT_CMP_BIASED
688 #define TARGET_LIB_INT_CMP_BIASED (true)
691 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
692 then the word-endianness is the same as for integers. */
693 #ifndef FLOAT_WORDS_BIG_ENDIAN
694 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
697 #ifndef TARGET_FLT_EVAL_METHOD
698 #define TARGET_FLT_EVAL_METHOD 0
701 #ifndef HOT_TEXT_SECTION_NAME
702 #define HOT_TEXT_SECTION_NAME ".text.hot"
705 #ifndef UNLIKELY_EXECUTED_TEXT_SECTION_NAME
706 #define UNLIKELY_EXECUTED_TEXT_SECTION_NAME ".text.unlikely"
709 #ifndef HAS_LONG_COND_BRANCH
710 #define HAS_LONG_COND_BRANCH 0
713 #ifndef HAS_LONG_UNCOND_BRANCH
714 #define HAS_LONG_UNCOND_BRANCH 0
717 #ifndef UNITS_PER_SIMD_WORD
718 #define UNITS_PER_SIMD_WORD 0
721 /* Determine whether __cxa_atexit, rather than atexit, is used to
722 register C++ destructors for local statics and global objects. */
723 #ifndef DEFAULT_USE_CXA_ATEXIT
724 #define DEFAULT_USE_CXA_ATEXIT 0
727 /* Determine whether extra constraint letter should be handled
728 via address reload (like 'o'). */
729 #ifndef EXTRA_MEMORY_CONSTRAINT
730 #define EXTRA_MEMORY_CONSTRAINT(C,STR) 0
733 /* Determine whether extra constraint letter should be handled
734 as an address (like 'p'). */
735 #ifndef EXTRA_ADDRESS_CONSTRAINT
736 #define EXTRA_ADDRESS_CONSTRAINT(C,STR) 0
739 /* When a port defines CONSTRAINT_LEN, it should use DEFAULT_CONSTRAINT_LEN
740 for all the characters that it does not want to change, so things like the
741 'length' of a digit in a matching constraint is an implementation detail,
742 and not part of the interface. */
743 #define DEFAULT_CONSTRAINT_LEN(C,STR) 1
745 #ifndef CONSTRAINT_LEN
746 #define CONSTRAINT_LEN(C,STR) DEFAULT_CONSTRAINT_LEN (C, STR)
749 #if defined (CONST_OK_FOR_LETTER_P) && ! defined (CONST_OK_FOR_CONSTRAINT_P)
750 #define CONST_OK_FOR_CONSTRAINT_P(VAL,C,STR) CONST_OK_FOR_LETTER_P (VAL, C)
753 #if defined (CONST_DOUBLE_OK_FOR_LETTER_P) && ! defined (CONST_DOUBLE_OK_FOR_CONSTRAINT_P)
754 #define CONST_DOUBLE_OK_FOR_CONSTRAINT_P(OP,C,STR) \
755 CONST_DOUBLE_OK_FOR_LETTER_P (OP, C)
758 #ifndef REG_CLASS_FROM_CONSTRAINT
759 #define REG_CLASS_FROM_CONSTRAINT(C,STR) REG_CLASS_FROM_LETTER (C)
762 #if defined (EXTRA_CONSTRAINT) && ! defined (EXTRA_CONSTRAINT_STR)
763 #define EXTRA_CONSTRAINT_STR(OP, C,STR) EXTRA_CONSTRAINT (OP, C)
766 #ifndef REGISTER_MOVE_COST
767 #define REGISTER_MOVE_COST(m, x, y) 2
770 /* Determine whether the the entire c99 runtime
771 is present in the runtime library. */
772 #ifndef TARGET_C99_FUNCTIONS
773 #define TARGET_C99_FUNCTIONS 0
776 /* Indicate that CLZ and CTZ are undefined at zero. */
777 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
778 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
780 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
781 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
784 /* Provide a default value for STORE_FLAG_VALUE. */
785 #ifndef STORE_FLAG_VALUE
786 #define STORE_FLAG_VALUE 1
789 /* This macro is used to determine what the largest unit size that
790 move_by_pieces can use is. */
792 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
793 move efficiently, as opposed to MOVE_MAX which is the maximum
794 number of bytes we can move with a single instruction. */
796 #ifndef MOVE_MAX_PIECES
797 #define MOVE_MAX_PIECES MOVE_MAX
800 #ifndef STACK_POINTER_OFFSET
801 #define STACK_POINTER_OFFSET 0
805 #define LOCAL_REGNO(REGNO) 0
808 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
809 the stack pointer does not matter. The value is tested only in
810 functions that have frame pointers. */
811 #ifndef EXIT_IGNORE_STACK
812 #define EXIT_IGNORE_STACK 0
815 /* Assume that case vectors are not pc-relative. */
816 #ifndef CASE_VECTOR_PC_RELATIVE
817 #define CASE_VECTOR_PC_RELATIVE 0
820 /* Assume that trampolines need function alignment. */
821 #ifndef TRAMPOLINE_ALIGNMENT
822 #define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY
825 /* Register mappings for target machines without register windows. */
826 #ifndef INCOMING_REGNO
827 #define INCOMING_REGNO(N) (N)
830 #ifndef OUTGOING_REGNO
831 #define OUTGOING_REGNO(N) (N)
834 #ifndef SHIFT_COUNT_TRUNCATED
835 #define SHIFT_COUNT_TRUNCATED 0
838 #ifndef LEGITIMIZE_ADDRESS
839 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)
842 #ifndef LEGITIMATE_PIC_OPERAND_P
843 #define LEGITIMATE_PIC_OPERAND_P(X) 1
846 #ifndef REVERSIBLE_CC_MODE
847 #define REVERSIBLE_CC_MODE(MODE) 0
850 /* Biggest alignment supported by the object file format of this machine. */
851 #ifndef MAX_OFILE_ALIGNMENT
852 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
855 #endif /* ! GCC_DEFAULTS_H */