1 /* Definitions of various defaults for tm.h macros.
2 Copyright (C) 1992, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
4 Free Software Foundation, Inc.
5 Contributed by Ron Guilmette (rfg@monkeys.com)
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify it under
10 the terms of the GNU General Public License as published by the Free
11 Software Foundation; either version 2, or (at your option) any later
14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING. If not, write to the Free
21 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
24 #ifndef GCC_DEFAULTS_H
25 #define GCC_DEFAULTS_H
27 #ifndef GET_ENVIRONMENT
28 #define GET_ENVIRONMENT(VALUE, NAME) do { (VALUE) = getenv (NAME); } while (0)
31 #define obstack_chunk_alloc ((void *(*) (long)) xmalloc)
32 #define obstack_chunk_free ((void (*) (void *)) free)
33 #define OBSTACK_CHUNK_SIZE 0
34 #define gcc_obstack_init(OBSTACK) \
35 _obstack_begin ((OBSTACK), OBSTACK_CHUNK_SIZE, 0, \
36 obstack_chunk_alloc, \
39 /* Store in OUTPUT a string (made with alloca) containing an
40 assembler-name for a local static variable or function named NAME.
41 LABELNO is an integer which is different for each call. */
44 # ifndef NO_DOT_IN_LABEL
45 # define ASM_PN_FORMAT "%s.%lu"
47 # ifndef NO_DOLLAR_IN_LABEL
48 # define ASM_PN_FORMAT "%s$%lu"
50 # define ASM_PN_FORMAT "__%s_%lu"
53 #endif /* ! ASM_PN_FORMAT */
55 #ifndef ASM_FORMAT_PRIVATE_NAME
56 # define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
57 do { const char *const name_ = (NAME); \
58 char *const output_ = (OUTPUT) = \
59 (char *) alloca (strlen (name_) + 32); \
60 sprintf (output_, ASM_PN_FORMAT, name_, (unsigned long)(LABELNO)); \
64 /* Choose a reasonable default for ASM_OUTPUT_ASCII. */
66 #ifndef ASM_OUTPUT_ASCII
67 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
69 FILE *_hide_asm_out_file = (MYFILE); \
70 const unsigned char *_hide_p = (const unsigned char *) (MYSTRING); \
71 int _hide_thissize = (MYLENGTH); \
73 FILE *asm_out_file = _hide_asm_out_file; \
74 const unsigned char *p = _hide_p; \
75 int thissize = _hide_thissize; \
77 fprintf (asm_out_file, "\t.ascii \""); \
79 for (i = 0; i < thissize; i++) \
82 if (c == '\"' || c == '\\') \
83 putc ('\\', asm_out_file); \
85 putc (c, asm_out_file); \
88 fprintf (asm_out_file, "\\%o", c); \
89 /* After an octal-escape, if a digit follows, \
90 terminate one string constant and start another. \
91 The VAX assembler fails to stop reading the escape \
92 after three digits, so this is the only way we \
93 can get it to parse the data properly. */ \
94 if (i < thissize - 1 && ISDIGIT(p[i + 1])) \
95 fprintf (asm_out_file, "\"\n\t.ascii \""); \
98 fprintf (asm_out_file, "\"\n"); \
104 /* This is how we tell the assembler to equate two values. */
106 #ifndef ASM_OUTPUT_DEF
107 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
108 do { fprintf ((FILE), "%s", SET_ASM_OP); \
109 assemble_name (FILE, LABEL1); \
110 fprintf (FILE, ","); \
111 assemble_name (FILE, LABEL2); \
112 fprintf (FILE, "\n"); \
117 /* Decide whether to defer emitting the assembler output for an equate
118 of two values. The default is to not defer output. */
119 #ifndef TARGET_DEFERRED_OUTPUT_DEFS
120 #define TARGET_DEFERRED_OUTPUT_DEFS(DECL,TARGET) false
123 /* This is how to output the definition of a user-level label named
124 NAME, such as the label on a static function or variable NAME. */
126 #ifndef ASM_OUTPUT_LABEL
127 #define ASM_OUTPUT_LABEL(FILE,NAME) \
128 do { assemble_name ((FILE), (NAME)); fputs (":\n", (FILE)); } while (0)
131 /* Output the definition of a compiler-generated label named NAME. */
132 #ifndef ASM_OUTPUT_INTERNAL_LABEL
133 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,NAME) \
135 assemble_name_raw ((FILE), (NAME)); \
136 fputs (":\n", (FILE)); \
140 /* This is how to output a reference to a user-level label named NAME. */
142 #ifndef ASM_OUTPUT_LABELREF
143 #define ASM_OUTPUT_LABELREF(FILE,NAME) asm_fprintf ((FILE), "%U%s", (NAME))
146 /* Allow target to print debug info labels specially. This is useful for
147 VLIW targets, since debug info labels should go into the middle of
148 instruction bundles instead of breaking them. */
150 #ifndef ASM_OUTPUT_DEBUG_LABEL
151 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
152 (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM)
155 /* This is how we tell the assembler that a symbol is weak. */
156 #ifndef ASM_OUTPUT_WEAK_ALIAS
157 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
158 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE) \
161 ASM_WEAKEN_LABEL (STREAM, NAME); \
163 ASM_OUTPUT_DEF (STREAM, NAME, VALUE); \
169 /* How to emit a .type directive. */
170 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE
171 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT
172 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE) \
175 fputs (TYPE_ASM_OP, STREAM); \
176 assemble_name (STREAM, NAME); \
177 fputs (", ", STREAM); \
178 fprintf (STREAM, TYPE_OPERAND_FMT, TYPE); \
179 putc ('\n', STREAM); \
185 /* How to emit a .size directive. */
186 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE
188 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE) \
191 HOST_WIDE_INT size_ = (SIZE); \
192 fputs (SIZE_ASM_OP, STREAM); \
193 assemble_name (STREAM, NAME); \
194 fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \
198 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME) \
201 fputs (SIZE_ASM_OP, STREAM); \
202 assemble_name (STREAM, NAME); \
203 fputs (", .-", STREAM); \
204 assemble_name (STREAM, NAME); \
205 putc ('\n', STREAM); \
212 /* This determines whether or not we support weak symbols. */
213 #ifndef SUPPORTS_WEAK
214 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
215 #define SUPPORTS_WEAK 1
217 #define SUPPORTS_WEAK 0
221 /* This determines whether or not we support link-once semantics. */
222 #ifndef SUPPORTS_ONE_ONLY
223 #ifdef MAKE_DECL_ONE_ONLY
224 #define SUPPORTS_ONE_ONLY 1
226 #define SUPPORTS_ONE_ONLY 0
230 /* This determines whether weak symbols must be left out of a static
231 archive's table of contents. Defining this macro to be nonzero has
232 the consequence that certain symbols will not be made weak that
233 otherwise would be. The C++ ABI requires this macro to be zero;
234 see the documentation. */
235 #ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
236 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
239 /* This determines whether or not we need linkonce unwind information. */
240 #ifndef TARGET_USES_WEAK_UNWIND_INFO
241 #define TARGET_USES_WEAK_UNWIND_INFO 0
244 /* By default, there is no prefix on user-defined symbols. */
245 #ifndef USER_LABEL_PREFIX
246 #define USER_LABEL_PREFIX ""
249 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
250 provide a weak attribute. Else define it to nothing.
252 This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
253 not available at that time.
255 Note, this is only for use by target files which we know are to be
257 #ifndef TARGET_ATTRIBUTE_WEAK
259 # define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
261 # define TARGET_ATTRIBUTE_WEAK
265 /* Determines whether we may use common symbols to represent one-only
266 semantics (a.k.a. "vague linkage"). */
267 #ifndef USE_COMMON_FOR_ONE_ONLY
268 # define USE_COMMON_FOR_ONE_ONLY 1
271 /* By default we can assume that all global symbols are in one namespace,
272 across all shared libraries. */
273 #ifndef MULTIPLE_SYMBOL_SPACES
274 # define MULTIPLE_SYMBOL_SPACES 0
277 /* If the target supports init_priority C++ attribute, give
278 SUPPORTS_INIT_PRIORITY a nonzero value. */
279 #ifndef SUPPORTS_INIT_PRIORITY
280 #define SUPPORTS_INIT_PRIORITY 1
281 #endif /* SUPPORTS_INIT_PRIORITY */
283 /* If duplicate library search directories can be removed from a
284 linker command without changing the linker's semantics, give this
286 #ifndef LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
287 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 0
288 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
290 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
291 the rest of the DWARF 2 frame unwind support is also provided. */
292 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
293 #define DWARF2_UNWIND_INFO 1
296 /* If we have named sections, and we're using crtstuff to run ctors,
297 use them for registering eh frame information. */
298 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
299 && !defined(EH_FRAME_IN_DATA_SECTION)
300 #ifndef EH_FRAME_SECTION_NAME
301 #define EH_FRAME_SECTION_NAME ".eh_frame"
305 /* On many systems, different EH table encodings are used under
306 difference circumstances. Some will require runtime relocations;
307 some will not. For those that do not require runtime relocations,
308 we would like to make the table read-only. However, since the
309 read-only tables may need to be combined with read-write tables
310 that do require runtime relocation, it is not safe to make the
311 tables read-only unless the linker will merge read-only and
312 read-write sections into a single read-write section. If your
313 linker does not have this ability, but your system is such that no
314 encoding used with non-PIC code will ever require a runtime
315 relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in
316 your target configuration file. */
317 #ifndef EH_TABLES_CAN_BE_READ_ONLY
318 #ifdef HAVE_LD_RO_RW_SECTION_MIXING
319 #define EH_TABLES_CAN_BE_READ_ONLY 1
321 #define EH_TABLES_CAN_BE_READ_ONLY 0
325 /* If we have named section and we support weak symbols, then use the
326 .jcr section for recording java classes which need to be registered
327 at program start-up time. */
328 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
329 #ifndef JCR_SECTION_NAME
330 #define JCR_SECTION_NAME ".jcr"
334 /* This decision to use a .jcr section can be overridden by defining
335 USE_JCR_SECTION to 0 in target file. This is necessary if target
336 can define JCR_SECTION_NAME but does not have crtstuff or
337 linker support for .jcr section. */
338 #ifndef TARGET_USE_JCR_SECTION
339 #ifdef JCR_SECTION_NAME
340 #define TARGET_USE_JCR_SECTION 1
342 #define TARGET_USE_JCR_SECTION 0
346 /* Number of hardware registers that go into the DWARF-2 unwind info.
347 If not defined, equals FIRST_PSEUDO_REGISTER */
349 #ifndef DWARF_FRAME_REGISTERS
350 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
353 /* How to renumber registers for dbx and gdb. If not defined, assume
354 no renumbering is necessary. */
356 #ifndef DBX_REGISTER_NUMBER
357 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
360 /* Default sizes for base C types. If the sizes are different for
361 your target, you should override these values by defining the
362 appropriate symbols in your tm.h file. */
364 #ifndef BITS_PER_UNIT
365 #define BITS_PER_UNIT 8
368 #ifndef BITS_PER_WORD
369 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
372 #ifndef CHAR_TYPE_SIZE
373 #define CHAR_TYPE_SIZE BITS_PER_UNIT
376 #ifndef BOOL_TYPE_SIZE
377 /* `bool' has size and alignment `1', on almost all platforms. */
378 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
381 #ifndef SHORT_TYPE_SIZE
382 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
385 #ifndef INT_TYPE_SIZE
386 #define INT_TYPE_SIZE BITS_PER_WORD
389 #ifndef LONG_TYPE_SIZE
390 #define LONG_TYPE_SIZE BITS_PER_WORD
393 #ifndef LONG_LONG_TYPE_SIZE
394 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
397 #ifndef WCHAR_TYPE_SIZE
398 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
401 #ifndef FLOAT_TYPE_SIZE
402 #define FLOAT_TYPE_SIZE BITS_PER_WORD
405 #ifndef DOUBLE_TYPE_SIZE
406 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
409 #ifndef LONG_DOUBLE_TYPE_SIZE
410 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
413 /* Width in bits of a pointer. Mind the value of the macro `Pmode'. */
415 #define POINTER_SIZE BITS_PER_WORD
418 #ifndef PIC_OFFSET_TABLE_REGNUM
419 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
422 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
423 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
426 #ifndef TARGET_DECLSPEC
427 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
428 /* If the target supports the "dllimport" attribute, users are
429 probably used to the "__declspec" syntax. */
430 #define TARGET_DECLSPEC 1
432 #define TARGET_DECLSPEC 0
436 /* By default, the preprocessor should be invoked the same way in C++
438 #ifndef CPLUSPLUS_CPP_SPEC
440 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
444 #ifndef ACCUMULATE_OUTGOING_ARGS
445 #define ACCUMULATE_OUTGOING_ARGS 0
448 /* Supply a default definition for PUSH_ARGS. */
451 #define PUSH_ARGS !ACCUMULATE_OUTGOING_ARGS
457 /* Decide whether a function's arguments should be processed
458 from first to last or from last to first.
460 They should if the stack and args grow in opposite directions, but
461 only if we have push insns. */
465 #ifndef PUSH_ARGS_REVERSED
466 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
467 #define PUSH_ARGS_REVERSED PUSH_ARGS
473 #ifndef PUSH_ARGS_REVERSED
474 #define PUSH_ARGS_REVERSED 0
477 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
478 STACK_BOUNDARY is required. */
479 #ifndef PREFERRED_STACK_BOUNDARY
480 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
483 #ifndef TARGET_DEFAULT_PACK_STRUCT
484 #define TARGET_DEFAULT_PACK_STRUCT 0
487 /* By default, the C++ compiler will use function addresses in the
488 vtable entries. Setting this nonzero tells the compiler to use
489 function descriptors instead. The value of this macro says how
490 many words wide the descriptor is (normally 2). It is assumed
491 that the address of a function descriptor may be treated as a
492 pointer to a function. */
493 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
494 #define TARGET_VTABLE_USES_DESCRIPTORS 0
497 /* By default, the vtable entries are void pointers, the so the alignment
498 is the same as pointer alignment. The value of this macro specifies
499 the alignment of the vtable entry in bits. It should be defined only
500 when special alignment is necessary. */
501 #ifndef TARGET_VTABLE_ENTRY_ALIGN
502 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
505 /* There are a few non-descriptor entries in the vtable at offsets below
506 zero. If these entries must be padded (say, to preserve the alignment
507 specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
508 words in each data entry. */
509 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
510 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
513 /* Decide whether it is safe to use a local alias for a virtual function
514 when constructing thunks. */
515 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
516 #ifdef ASM_OUTPUT_DEF
517 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
519 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
523 /* Select a format to encode pointers in exception handling data. We
524 prefer those that result in fewer dynamic relocations. Assume no
525 special support here and encode direct references. */
526 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
527 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) DW_EH_PE_absptr
530 /* By default, the C++ compiler will use the lowest bit of the pointer
531 to function to indicate a pointer-to-member-function points to a
532 virtual member function. However, if FUNCTION_BOUNDARY indicates
533 function addresses aren't always even, the lowest bit of the delta
534 field will be used. */
535 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
536 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
537 (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
538 ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
541 #ifndef DEFAULT_GDB_EXTENSIONS
542 #define DEFAULT_GDB_EXTENSIONS 1
545 /* If more than one debugging type is supported, you must define
546 PREFERRED_DEBUGGING_TYPE to choose the default. */
548 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
549 + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
550 + defined (VMS_DEBUGGING_INFO))
551 #ifndef PREFERRED_DEBUGGING_TYPE
552 #error You must define PREFERRED_DEBUGGING_TYPE
553 #endif /* no PREFERRED_DEBUGGING_TYPE */
555 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
556 here so other code needn't care. */
557 #elif defined DBX_DEBUGGING_INFO
558 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
560 #elif defined SDB_DEBUGGING_INFO
561 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
563 #elif defined DWARF2_DEBUGGING_INFO
564 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
566 #elif defined VMS_DEBUGGING_INFO
567 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
569 #elif defined XCOFF_DEBUGGING_INFO
570 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
573 /* No debugging format is supported by this target. */
574 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
577 /* Define codes for all the float formats that we know of. */
578 #define UNKNOWN_FLOAT_FORMAT 0
579 #define IEEE_FLOAT_FORMAT 1
580 #define VAX_FLOAT_FORMAT 2
581 #define IBM_FLOAT_FORMAT 3
582 #define C4X_FLOAT_FORMAT 4
584 /* Default to IEEE float if not specified. Nearly all machines use it. */
585 #ifndef TARGET_FLOAT_FORMAT
586 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
589 /* Some macros can be defined by the backend in either a mode-dependent
590 or mode-independent form. The compiler proper should only use the
591 mode-dependent form, providing VOIDmode when the mode is unknown.
592 We can't poison the macros because the backend may reference them. */
594 #ifndef REGNO_MODE_OK_FOR_BASE_P
595 #define REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) REGNO_OK_FOR_BASE_P (REGNO)
598 #ifndef REG_MODE_OK_FOR_BASE_P
599 #define REG_MODE_OK_FOR_BASE_P(REG, MODE) REG_OK_FOR_BASE_P (REG)
602 /* Determine the register class for registers suitable to be the base
603 address register in a MEM. Allow the choice to be dependent upon
604 the mode of the memory access. */
605 #ifndef MODE_BASE_REG_CLASS
606 #define MODE_BASE_REG_CLASS(MODE) BASE_REG_CLASS
609 /* Some machines require a different base register class if the index
610 is a register. By default, assume that a base register is acceptable. */
611 #ifndef MODE_BASE_REG_REG_CLASS
612 #define MODE_BASE_REG_REG_CLASS(MODE) MODE_BASE_REG_CLASS(MODE)
615 #ifndef REGNO_MODE_OK_FOR_REG_BASE_P
616 #define REGNO_MODE_OK_FOR_REG_BASE_P(REGNO, MODE) REGNO_MODE_OK_FOR_BASE_P (REGNO, MODE)
619 #ifndef REG_MODE_OK_FOR_REG_BASE_P
620 #define REG_MODE_OK_FOR_REG_BASE_P(REGNO, MODE) REG_MODE_OK_FOR_BASE_P (REGNO, MODE)
623 #ifndef LARGEST_EXPONENT_IS_NORMAL
624 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
627 #ifndef ROUND_TOWARDS_ZERO
628 #define ROUND_TOWARDS_ZERO 0
631 #ifndef MODE_HAS_NANS
632 #define MODE_HAS_NANS(MODE) \
633 (FLOAT_MODE_P (MODE) \
634 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
635 && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
638 #ifndef MODE_HAS_INFINITIES
639 #define MODE_HAS_INFINITIES(MODE) \
640 (FLOAT_MODE_P (MODE) \
641 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
642 && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
645 #ifndef MODE_HAS_SIGNED_ZEROS
646 #define MODE_HAS_SIGNED_ZEROS(MODE) \
647 (FLOAT_MODE_P (MODE) && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT)
650 #ifndef MODE_HAS_SIGN_DEPENDENT_ROUNDING
651 #define MODE_HAS_SIGN_DEPENDENT_ROUNDING(MODE) \
652 (FLOAT_MODE_P (MODE) \
653 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
654 && !ROUND_TOWARDS_ZERO)
657 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
658 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
661 /* True if the targets integer-comparison functions return { 0, 1, 2
662 } to indicate { <, ==, > }. False if { -1, 0, 1 } is used
663 instead. The libgcc routines are biased. */
664 #ifndef TARGET_LIB_INT_CMP_BIASED
665 #define TARGET_LIB_INT_CMP_BIASED (true)
668 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
669 then the word-endianness is the same as for integers. */
670 #ifndef FLOAT_WORDS_BIG_ENDIAN
671 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
674 #ifndef TARGET_FLT_EVAL_METHOD
675 #define TARGET_FLT_EVAL_METHOD 0
678 #ifndef HOT_TEXT_SECTION_NAME
679 #define HOT_TEXT_SECTION_NAME ".text.hot"
682 #ifndef UNLIKELY_EXECUTED_TEXT_SECTION_NAME
683 #define UNLIKELY_EXECUTED_TEXT_SECTION_NAME ".text.unlikely"
686 #ifndef HAS_LONG_COND_BRANCH
687 #define HAS_LONG_COND_BRANCH 0
690 #ifndef HAS_LONG_UNCOND_BRANCH
691 #define HAS_LONG_UNCOND_BRANCH 0
694 /* By default, only attempt to parallelize bitwise operations, and
695 possibly adds/subtracts using bit-twiddling. */
696 #ifndef UNITS_PER_SIMD_WORD
697 #define UNITS_PER_SIMD_WORD UNITS_PER_WORD
700 /* Determine whether __cxa_atexit, rather than atexit, is used to
701 register C++ destructors for local statics and global objects. */
702 #ifndef DEFAULT_USE_CXA_ATEXIT
703 #define DEFAULT_USE_CXA_ATEXIT 0
706 /* Determine whether extra constraint letter should be handled
707 via address reload (like 'o'). */
708 #ifndef EXTRA_MEMORY_CONSTRAINT
709 #define EXTRA_MEMORY_CONSTRAINT(C,STR) 0
712 /* Determine whether extra constraint letter should be handled
713 as an address (like 'p'). */
714 #ifndef EXTRA_ADDRESS_CONSTRAINT
715 #define EXTRA_ADDRESS_CONSTRAINT(C,STR) 0
718 /* When a port defines CONSTRAINT_LEN, it should use DEFAULT_CONSTRAINT_LEN
719 for all the characters that it does not want to change, so things like the
720 'length' of a digit in a matching constraint is an implementation detail,
721 and not part of the interface. */
722 #define DEFAULT_CONSTRAINT_LEN(C,STR) 1
724 #ifndef CONSTRAINT_LEN
725 #define CONSTRAINT_LEN(C,STR) DEFAULT_CONSTRAINT_LEN (C, STR)
728 #if defined (CONST_OK_FOR_LETTER_P) && ! defined (CONST_OK_FOR_CONSTRAINT_P)
729 #define CONST_OK_FOR_CONSTRAINT_P(VAL,C,STR) CONST_OK_FOR_LETTER_P (VAL, C)
732 #if defined (CONST_DOUBLE_OK_FOR_LETTER_P) && ! defined (CONST_DOUBLE_OK_FOR_CONSTRAINT_P)
733 #define CONST_DOUBLE_OK_FOR_CONSTRAINT_P(OP,C,STR) \
734 CONST_DOUBLE_OK_FOR_LETTER_P (OP, C)
737 #ifndef REG_CLASS_FROM_CONSTRAINT
738 #define REG_CLASS_FROM_CONSTRAINT(C,STR) REG_CLASS_FROM_LETTER (C)
741 #if defined (EXTRA_CONSTRAINT) && ! defined (EXTRA_CONSTRAINT_STR)
742 #define EXTRA_CONSTRAINT_STR(OP, C,STR) EXTRA_CONSTRAINT (OP, C)
745 #ifndef REGISTER_MOVE_COST
746 #define REGISTER_MOVE_COST(m, x, y) 2
749 /* Determine whether the entire c99 runtime
750 is present in the runtime library. */
751 #ifndef TARGET_C99_FUNCTIONS
752 #define TARGET_C99_FUNCTIONS 0
755 /* Indicate that CLZ and CTZ are undefined at zero. */
756 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
757 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
759 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
760 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
763 /* Provide a default value for STORE_FLAG_VALUE. */
764 #ifndef STORE_FLAG_VALUE
765 #define STORE_FLAG_VALUE 1
768 /* This macro is used to determine what the largest unit size that
769 move_by_pieces can use is. */
771 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
772 move efficiently, as opposed to MOVE_MAX which is the maximum
773 number of bytes we can move with a single instruction. */
775 #ifndef MOVE_MAX_PIECES
776 #define MOVE_MAX_PIECES MOVE_MAX
779 #ifndef STACK_POINTER_OFFSET
780 #define STACK_POINTER_OFFSET 0
784 #define LOCAL_REGNO(REGNO) 0
787 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
788 the stack pointer does not matter. The value is tested only in
789 functions that have frame pointers. */
790 #ifndef EXIT_IGNORE_STACK
791 #define EXIT_IGNORE_STACK 0
794 /* Assume that case vectors are not pc-relative. */
795 #ifndef CASE_VECTOR_PC_RELATIVE
796 #define CASE_VECTOR_PC_RELATIVE 0
799 /* Assume that trampolines need function alignment. */
800 #ifndef TRAMPOLINE_ALIGNMENT
801 #define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY
804 /* Register mappings for target machines without register windows. */
805 #ifndef INCOMING_REGNO
806 #define INCOMING_REGNO(N) (N)
809 #ifndef OUTGOING_REGNO
810 #define OUTGOING_REGNO(N) (N)
813 #ifndef SHIFT_COUNT_TRUNCATED
814 #define SHIFT_COUNT_TRUNCATED 0
817 #ifndef LEGITIMIZE_ADDRESS
818 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)
821 #ifndef LEGITIMATE_PIC_OPERAND_P
822 #define LEGITIMATE_PIC_OPERAND_P(X) 1
825 #ifndef REVERSIBLE_CC_MODE
826 #define REVERSIBLE_CC_MODE(MODE) 0
829 /* Biggest alignment supported by the object file format of this machine. */
830 #ifndef MAX_OFILE_ALIGNMENT
831 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
834 #ifndef FRAME_GROWS_DOWNWARD
835 #define FRAME_GROWS_DOWNWARD 0
838 #endif /* ! GCC_DEFAULTS_H */