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 3, 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 Under Section 7 of GPL version 3, you are granted additional
20 permissions described in the GCC Runtime Library Exception, version
21 3.1, as published by the Free Software Foundation.
23 You should have received a copy of the GNU General Public License and
24 a copy of the GCC Runtime Library Exception along with this program;
25 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
26 <http://www.gnu.org/licenses/>. */
28 #ifndef GCC_DEFAULTS_H
29 #define GCC_DEFAULTS_H
31 #ifndef GET_ENVIRONMENT
32 #define GET_ENVIRONMENT(VALUE, NAME) do { (VALUE) = getenv (NAME); } while (0)
35 #define obstack_chunk_alloc ((void *(*) (long)) xmalloc)
36 #define obstack_chunk_free ((void (*) (void *)) free)
37 #define OBSTACK_CHUNK_SIZE 0
38 #define gcc_obstack_init(OBSTACK) \
39 _obstack_begin ((OBSTACK), OBSTACK_CHUNK_SIZE, 0, \
40 obstack_chunk_alloc, \
43 /* Store in OUTPUT a string (made with alloca) containing an
44 assembler-name for a local static variable or function named NAME.
45 LABELNO is an integer which is different for each call. */
48 # ifndef NO_DOT_IN_LABEL
49 # define ASM_PN_FORMAT "%s.%lu"
51 # ifndef NO_DOLLAR_IN_LABEL
52 # define ASM_PN_FORMAT "%s$%lu"
54 # define ASM_PN_FORMAT "__%s_%lu"
57 #endif /* ! ASM_PN_FORMAT */
59 #ifndef ASM_FORMAT_PRIVATE_NAME
60 # define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
61 do { const char *const name_ = (NAME); \
62 char *const output_ = (OUTPUT) = \
63 (char *) alloca (strlen (name_) + 32); \
64 sprintf (output_, ASM_PN_FORMAT, name_, (unsigned long)(LABELNO)); \
68 /* Choose a reasonable default for ASM_OUTPUT_ASCII. */
70 #ifndef ASM_OUTPUT_ASCII
71 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
73 FILE *_hide_asm_out_file = (MYFILE); \
74 const unsigned char *_hide_p = (const unsigned char *) (MYSTRING); \
75 int _hide_thissize = (MYLENGTH); \
77 FILE *asm_out_file = _hide_asm_out_file; \
78 const unsigned char *p = _hide_p; \
79 int thissize = _hide_thissize; \
81 fprintf (asm_out_file, "\t.ascii \""); \
83 for (i = 0; i < thissize; i++) \
86 if (c == '\"' || c == '\\') \
87 putc ('\\', asm_out_file); \
89 putc (c, asm_out_file); \
92 fprintf (asm_out_file, "\\%o", c); \
93 /* After an octal-escape, if a digit follows, \
94 terminate one string constant and start another. \
95 The VAX assembler fails to stop reading the escape \
96 after three digits, so this is the only way we \
97 can get it to parse the data properly. */ \
98 if (i < thissize - 1 && ISDIGIT(p[i + 1])) \
99 fprintf (asm_out_file, "\"\n\t.ascii \""); \
102 fprintf (asm_out_file, "\"\n"); \
108 /* This is how we tell the assembler to equate two values. */
110 #ifndef ASM_OUTPUT_DEF
111 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
112 do { fprintf ((FILE), "%s", SET_ASM_OP); \
113 assemble_name (FILE, LABEL1); \
114 fprintf (FILE, ","); \
115 assemble_name (FILE, LABEL2); \
116 fprintf (FILE, "\n"); \
121 #if defined (HAVE_AS_TLS) && !defined (ASM_OUTPUT_TLS_COMMON)
122 #define ASM_OUTPUT_TLS_COMMON(FILE, DECL, NAME, SIZE) \
125 fprintf ((FILE), "\t.tls_common\t"); \
126 assemble_name ((FILE), (NAME)); \
127 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", \
128 (SIZE), DECL_ALIGN (DECL) / BITS_PER_UNIT); \
133 /* Decide whether to defer emitting the assembler output for an equate
134 of two values. The default is to not defer output. */
135 #ifndef TARGET_DEFERRED_OUTPUT_DEFS
136 #define TARGET_DEFERRED_OUTPUT_DEFS(DECL,TARGET) false
139 /* This is how to output the definition of a user-level label named
140 NAME, such as the label on a static function or variable NAME. */
142 #ifndef ASM_OUTPUT_LABEL
143 #define ASM_OUTPUT_LABEL(FILE,NAME) \
144 do { assemble_name ((FILE), (NAME)); fputs (":\n", (FILE)); } while (0)
147 /* Output the definition of a compiler-generated label named NAME. */
148 #ifndef ASM_OUTPUT_INTERNAL_LABEL
149 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,NAME) \
151 assemble_name_raw ((FILE), (NAME)); \
152 fputs (":\n", (FILE)); \
156 /* This is how to output a reference to a user-level label named NAME. */
158 #ifndef ASM_OUTPUT_LABELREF
159 #define ASM_OUTPUT_LABELREF(FILE,NAME) asm_fprintf ((FILE), "%U%s", (NAME))
162 /* Allow target to print debug info labels specially. This is useful for
163 VLIW targets, since debug info labels should go into the middle of
164 instruction bundles instead of breaking them. */
166 #ifndef ASM_OUTPUT_DEBUG_LABEL
167 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
168 (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM)
171 /* This is how we tell the assembler that a symbol is weak. */
172 #ifndef ASM_OUTPUT_WEAK_ALIAS
173 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
174 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE) \
177 ASM_WEAKEN_LABEL (STREAM, NAME); \
179 ASM_OUTPUT_DEF (STREAM, NAME, VALUE); \
185 /* This is how we tell the assembler that a symbol is a weak alias to
186 another symbol that doesn't require the other symbol to be defined.
187 Uses of the former will turn into weak uses of the latter, i.e.,
188 uses that, in case the latter is undefined, will not cause errors,
189 and will add it to the symbol table as weak undefined. However, if
190 the latter is referenced directly, a strong reference prevails. */
191 #ifndef ASM_OUTPUT_WEAKREF
192 #if defined HAVE_GAS_WEAKREF
193 #define ASM_OUTPUT_WEAKREF(FILE, DECL, NAME, VALUE) \
196 fprintf ((FILE), "\t.weakref\t"); \
197 assemble_name ((FILE), (NAME)); \
198 fprintf ((FILE), ","); \
199 assemble_name ((FILE), (VALUE)); \
200 fprintf ((FILE), "\n"); \
206 /* How to emit a .type directive. */
207 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE
208 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT
209 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE) \
212 fputs (TYPE_ASM_OP, STREAM); \
213 assemble_name (STREAM, NAME); \
214 fputs (", ", STREAM); \
215 fprintf (STREAM, TYPE_OPERAND_FMT, TYPE); \
216 putc ('\n', STREAM); \
222 /* How to emit a .size directive. */
223 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE
225 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE) \
228 HOST_WIDE_INT size_ = (SIZE); \
229 fputs (SIZE_ASM_OP, STREAM); \
230 assemble_name (STREAM, NAME); \
231 fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \
235 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME) \
238 fputs (SIZE_ASM_OP, STREAM); \
239 assemble_name (STREAM, NAME); \
240 fputs (", .-", STREAM); \
241 assemble_name (STREAM, NAME); \
242 putc ('\n', STREAM); \
249 /* This determines whether or not we support weak symbols. */
250 #ifndef SUPPORTS_WEAK
251 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
252 #define SUPPORTS_WEAK 1
254 #define SUPPORTS_WEAK 0
258 /* This determines whether or not we support the discriminator
259 attribute in the .loc directive. */
260 #ifndef SUPPORTS_DISCRIMINATOR
261 #ifdef HAVE_GAS_DISCRIMINATOR
262 #define SUPPORTS_DISCRIMINATOR 1
264 #define SUPPORTS_DISCRIMINATOR 0
268 /* This determines whether or not we support link-once semantics. */
269 #ifndef SUPPORTS_ONE_ONLY
270 #ifdef MAKE_DECL_ONE_ONLY
271 #define SUPPORTS_ONE_ONLY 1
273 #define SUPPORTS_ONE_ONLY 0
277 /* This determines whether weak symbols must be left out of a static
278 archive's table of contents. Defining this macro to be nonzero has
279 the consequence that certain symbols will not be made weak that
280 otherwise would be. The C++ ABI requires this macro to be zero;
281 see the documentation. */
282 #ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
283 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
286 /* This determines whether or not we need linkonce unwind information. */
287 #ifndef TARGET_USES_WEAK_UNWIND_INFO
288 #define TARGET_USES_WEAK_UNWIND_INFO 0
291 /* By default, there is no prefix on user-defined symbols. */
292 #ifndef USER_LABEL_PREFIX
293 #define USER_LABEL_PREFIX ""
296 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
297 provide a weak attribute. Else define it to nothing.
299 This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
300 not available at that time.
302 Note, this is only for use by target files which we know are to be
304 #ifndef TARGET_ATTRIBUTE_WEAK
306 # define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
308 # define TARGET_ATTRIBUTE_WEAK
312 /* Determines whether we may use common symbols to represent one-only
313 semantics (a.k.a. "vague linkage"). */
314 #ifndef USE_COMMON_FOR_ONE_ONLY
315 # define USE_COMMON_FOR_ONE_ONLY 1
318 /* By default we can assume that all global symbols are in one namespace,
319 across all shared libraries. */
320 #ifndef MULTIPLE_SYMBOL_SPACES
321 # define MULTIPLE_SYMBOL_SPACES 0
324 /* If the target supports init_priority C++ attribute, give
325 SUPPORTS_INIT_PRIORITY a nonzero value. */
326 #ifndef SUPPORTS_INIT_PRIORITY
327 #define SUPPORTS_INIT_PRIORITY 1
328 #endif /* SUPPORTS_INIT_PRIORITY */
330 /* If duplicate library search directories can be removed from a
331 linker command without changing the linker's semantics, give this
333 #ifndef LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
334 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 0
335 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
337 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
338 the rest of the DWARF 2 frame unwind support is also provided. */
339 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX) \
340 && !defined (TARGET_UNWIND_INFO)
341 #define DWARF2_UNWIND_INFO 1
344 /* If we have named sections, and we're using crtstuff to run ctors,
345 use them for registering eh frame information. */
346 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
347 && !defined(EH_FRAME_IN_DATA_SECTION)
348 #ifndef EH_FRAME_SECTION_NAME
349 #define EH_FRAME_SECTION_NAME ".eh_frame"
353 /* On many systems, different EH table encodings are used under
354 difference circumstances. Some will require runtime relocations;
355 some will not. For those that do not require runtime relocations,
356 we would like to make the table read-only. However, since the
357 read-only tables may need to be combined with read-write tables
358 that do require runtime relocation, it is not safe to make the
359 tables read-only unless the linker will merge read-only and
360 read-write sections into a single read-write section. If your
361 linker does not have this ability, but your system is such that no
362 encoding used with non-PIC code will ever require a runtime
363 relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in
364 your target configuration file. */
365 #ifndef EH_TABLES_CAN_BE_READ_ONLY
366 #ifdef HAVE_LD_RO_RW_SECTION_MIXING
367 #define EH_TABLES_CAN_BE_READ_ONLY 1
369 #define EH_TABLES_CAN_BE_READ_ONLY 0
373 /* If we have named section and we support weak symbols, then use the
374 .jcr section for recording java classes which need to be registered
375 at program start-up time. */
376 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
377 #ifndef JCR_SECTION_NAME
378 #define JCR_SECTION_NAME ".jcr"
382 /* This decision to use a .jcr section can be overridden by defining
383 USE_JCR_SECTION to 0 in target file. This is necessary if target
384 can define JCR_SECTION_NAME but does not have crtstuff or
385 linker support for .jcr section. */
386 #ifndef TARGET_USE_JCR_SECTION
387 #ifdef JCR_SECTION_NAME
388 #define TARGET_USE_JCR_SECTION 1
390 #define TARGET_USE_JCR_SECTION 0
394 /* Number of hardware registers that go into the DWARF-2 unwind info.
395 If not defined, equals FIRST_PSEUDO_REGISTER */
397 #ifndef DWARF_FRAME_REGISTERS
398 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
401 /* How to renumber registers for dbx and gdb. If not defined, assume
402 no renumbering is necessary. */
404 #ifndef DBX_REGISTER_NUMBER
405 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
408 /* Default sizes for base C types. If the sizes are different for
409 your target, you should override these values by defining the
410 appropriate symbols in your tm.h file. */
412 #ifndef BITS_PER_UNIT
413 #define BITS_PER_UNIT 8
416 #ifndef BITS_PER_WORD
417 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
420 #ifndef CHAR_TYPE_SIZE
421 #define CHAR_TYPE_SIZE BITS_PER_UNIT
424 #ifndef BOOL_TYPE_SIZE
425 /* `bool' has size and alignment `1', on almost all platforms. */
426 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
429 #ifndef SHORT_TYPE_SIZE
430 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
433 #ifndef INT_TYPE_SIZE
434 #define INT_TYPE_SIZE BITS_PER_WORD
437 #ifndef LONG_TYPE_SIZE
438 #define LONG_TYPE_SIZE BITS_PER_WORD
441 #ifndef LONG_LONG_TYPE_SIZE
442 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
445 #ifndef WCHAR_TYPE_SIZE
446 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
449 #ifndef FLOAT_TYPE_SIZE
450 #define FLOAT_TYPE_SIZE BITS_PER_WORD
453 #ifndef DOUBLE_TYPE_SIZE
454 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
457 #ifndef LONG_DOUBLE_TYPE_SIZE
458 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
461 #ifndef DECIMAL32_TYPE_SIZE
462 #define DECIMAL32_TYPE_SIZE 32
465 #ifndef DECIMAL64_TYPE_SIZE
466 #define DECIMAL64_TYPE_SIZE 64
469 #ifndef DECIMAL128_TYPE_SIZE
470 #define DECIMAL128_TYPE_SIZE 128
473 #ifndef SHORT_FRACT_TYPE_SIZE
474 #define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT
477 #ifndef FRACT_TYPE_SIZE
478 #define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2)
481 #ifndef LONG_FRACT_TYPE_SIZE
482 #define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4)
485 #ifndef LONG_LONG_FRACT_TYPE_SIZE
486 #define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8)
489 #ifndef SHORT_ACCUM_TYPE_SIZE
490 #define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2)
493 #ifndef ACCUM_TYPE_SIZE
494 #define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2)
497 #ifndef LONG_ACCUM_TYPE_SIZE
498 #define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2)
501 #ifndef LONG_LONG_ACCUM_TYPE_SIZE
502 #define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2)
505 /* Width in bits of a pointer. Mind the value of the macro `Pmode'. */
507 #define POINTER_SIZE BITS_PER_WORD
510 #ifndef PIC_OFFSET_TABLE_REGNUM
511 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
514 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
515 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
518 #ifndef TARGET_DECLSPEC
519 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
520 /* If the target supports the "dllimport" attribute, users are
521 probably used to the "__declspec" syntax. */
522 #define TARGET_DECLSPEC 1
524 #define TARGET_DECLSPEC 0
528 /* By default, the preprocessor should be invoked the same way in C++
530 #ifndef CPLUSPLUS_CPP_SPEC
532 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
536 #ifndef ACCUMULATE_OUTGOING_ARGS
537 #define ACCUMULATE_OUTGOING_ARGS 0
540 /* Supply a default definition for PUSH_ARGS. */
543 #define PUSH_ARGS !ACCUMULATE_OUTGOING_ARGS
549 /* Decide whether a function's arguments should be processed
550 from first to last or from last to first.
552 They should if the stack and args grow in opposite directions, but
553 only if we have push insns. */
557 #ifndef PUSH_ARGS_REVERSED
558 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
559 #define PUSH_ARGS_REVERSED PUSH_ARGS
565 #ifndef PUSH_ARGS_REVERSED
566 #define PUSH_ARGS_REVERSED 0
569 /* Default value for the alignment (in bits) a C conformant malloc has to
570 provide. This default is intended to be safe and always correct. */
571 #ifndef MALLOC_ABI_ALIGNMENT
572 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
575 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
576 STACK_BOUNDARY is required. */
577 #ifndef PREFERRED_STACK_BOUNDARY
578 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
581 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not
583 #ifndef INCOMING_STACK_BOUNDARY
584 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY
587 #ifndef TARGET_DEFAULT_PACK_STRUCT
588 #define TARGET_DEFAULT_PACK_STRUCT 0
591 /* By default, the C++ compiler will use function addresses in the
592 vtable entries. Setting this nonzero tells the compiler to use
593 function descriptors instead. The value of this macro says how
594 many words wide the descriptor is (normally 2). It is assumed
595 that the address of a function descriptor may be treated as a
596 pointer to a function. */
597 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
598 #define TARGET_VTABLE_USES_DESCRIPTORS 0
601 /* By default, the vtable entries are void pointers, the so the alignment
602 is the same as pointer alignment. The value of this macro specifies
603 the alignment of the vtable entry in bits. It should be defined only
604 when special alignment is necessary. */
605 #ifndef TARGET_VTABLE_ENTRY_ALIGN
606 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
609 /* There are a few non-descriptor entries in the vtable at offsets below
610 zero. If these entries must be padded (say, to preserve the alignment
611 specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
612 words in each data entry. */
613 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
614 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
617 /* Decide whether it is safe to use a local alias for a virtual function
618 when constructing thunks. */
619 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
620 #ifdef ASM_OUTPUT_DEF
621 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
623 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
627 /* Select a format to encode pointers in exception handling data. We
628 prefer those that result in fewer dynamic relocations. Assume no
629 special support here and encode direct references. */
630 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
631 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) DW_EH_PE_absptr
634 /* By default, the C++ compiler will use the lowest bit of the pointer
635 to function to indicate a pointer-to-member-function points to a
636 virtual member function. However, if FUNCTION_BOUNDARY indicates
637 function addresses aren't always even, the lowest bit of the delta
638 field will be used. */
639 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
640 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
641 (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
642 ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
645 #ifndef DEFAULT_GDB_EXTENSIONS
646 #define DEFAULT_GDB_EXTENSIONS 1
649 /* If more than one debugging type is supported, you must define
650 PREFERRED_DEBUGGING_TYPE to choose the default. */
652 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
653 + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
654 + defined (VMS_DEBUGGING_INFO))
655 #ifndef PREFERRED_DEBUGGING_TYPE
656 #error You must define PREFERRED_DEBUGGING_TYPE
657 #endif /* no PREFERRED_DEBUGGING_TYPE */
659 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
660 here so other code needn't care. */
661 #elif defined DBX_DEBUGGING_INFO
662 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
664 #elif defined SDB_DEBUGGING_INFO
665 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
667 #elif defined DWARF2_DEBUGGING_INFO
668 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
670 #elif defined VMS_DEBUGGING_INFO
671 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
673 #elif defined XCOFF_DEBUGGING_INFO
674 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
677 /* No debugging format is supported by this target. */
678 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
681 #ifndef LARGEST_EXPONENT_IS_NORMAL
682 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
685 #ifndef ROUND_TOWARDS_ZERO
686 #define ROUND_TOWARDS_ZERO 0
689 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
690 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
693 /* True if the targets integer-comparison functions return { 0, 1, 2
694 } to indicate { <, ==, > }. False if { -1, 0, 1 } is used
695 instead. The libgcc routines are biased. */
696 #ifndef TARGET_LIB_INT_CMP_BIASED
697 #define TARGET_LIB_INT_CMP_BIASED (true)
700 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
701 then the word-endianness is the same as for integers. */
702 #ifndef FLOAT_WORDS_BIG_ENDIAN
703 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
706 #ifndef TARGET_FLT_EVAL_METHOD
707 #define TARGET_FLT_EVAL_METHOD 0
710 #ifndef TARGET_DEC_EVAL_METHOD
711 #define TARGET_DEC_EVAL_METHOD 2
714 #ifndef HOT_TEXT_SECTION_NAME
715 #define HOT_TEXT_SECTION_NAME ".text.hot"
718 #ifndef UNLIKELY_EXECUTED_TEXT_SECTION_NAME
719 #define UNLIKELY_EXECUTED_TEXT_SECTION_NAME ".text.unlikely"
722 #ifndef HAS_LONG_COND_BRANCH
723 #define HAS_LONG_COND_BRANCH 0
726 #ifndef HAS_LONG_UNCOND_BRANCH
727 #define HAS_LONG_UNCOND_BRANCH 0
730 /* By default, only attempt to parallelize bitwise operations, and
731 possibly adds/subtracts using bit-twiddling. */
732 #ifndef UNITS_PER_SIMD_WORD
733 #define UNITS_PER_SIMD_WORD(MODE) UNITS_PER_WORD
736 /* Determine whether __cxa_atexit, rather than atexit, is used to
737 register C++ destructors for local statics and global objects. */
738 #ifndef DEFAULT_USE_CXA_ATEXIT
739 #define DEFAULT_USE_CXA_ATEXIT 0
742 /* If none of these macros are defined, the port must use the new
743 technique of defining constraints in the machine description.
744 tm_p.h will define those macros that machine-independent code
746 #if !defined CONSTRAINT_LEN \
747 && !defined REG_CLASS_FROM_LETTER \
748 && !defined REG_CLASS_FROM_CONSTRAINT \
749 && !defined CONST_OK_FOR_LETTER_P \
750 && !defined CONST_OK_FOR_CONSTRAINT_P \
751 && !defined CONST_DOUBLE_OK_FOR_LETTER_P \
752 && !defined CONST_DOUBLE_OK_FOR_CONSTRAINT_P \
753 && !defined EXTRA_CONSTRAINT \
754 && !defined EXTRA_CONSTRAINT_STR \
755 && !defined EXTRA_MEMORY_CONSTRAINT \
756 && !defined EXTRA_ADDRESS_CONSTRAINT
758 #define USE_MD_CONSTRAINTS
760 #if GCC_VERSION >= 3000 && defined IN_GCC
761 /* These old constraint macros shouldn't appear anywhere in a
762 configuration using MD constraint definitions. */
763 #pragma GCC poison REG_CLASS_FROM_LETTER CONST_OK_FOR_LETTER_P \
764 CONST_DOUBLE_OK_FOR_LETTER_P EXTRA_CONSTRAINT
767 #else /* old constraint mechanism in use */
769 /* Determine whether extra constraint letter should be handled
770 via address reload (like 'o'). */
771 #ifndef EXTRA_MEMORY_CONSTRAINT
772 #define EXTRA_MEMORY_CONSTRAINT(C,STR) 0
775 /* Determine whether extra constraint letter should be handled
776 as an address (like 'p'). */
777 #ifndef EXTRA_ADDRESS_CONSTRAINT
778 #define EXTRA_ADDRESS_CONSTRAINT(C,STR) 0
781 /* When a port defines CONSTRAINT_LEN, it should use DEFAULT_CONSTRAINT_LEN
782 for all the characters that it does not want to change, so things like the
783 'length' of a digit in a matching constraint is an implementation detail,
784 and not part of the interface. */
785 #define DEFAULT_CONSTRAINT_LEN(C,STR) 1
787 #ifndef CONSTRAINT_LEN
788 #define CONSTRAINT_LEN(C,STR) DEFAULT_CONSTRAINT_LEN (C, STR)
791 #if defined (CONST_OK_FOR_LETTER_P) && ! defined (CONST_OK_FOR_CONSTRAINT_P)
792 #define CONST_OK_FOR_CONSTRAINT_P(VAL,C,STR) CONST_OK_FOR_LETTER_P (VAL, C)
795 #if defined (CONST_DOUBLE_OK_FOR_LETTER_P) && ! defined (CONST_DOUBLE_OK_FOR_CONSTRAINT_P)
796 #define CONST_DOUBLE_OK_FOR_CONSTRAINT_P(OP,C,STR) \
797 CONST_DOUBLE_OK_FOR_LETTER_P (OP, C)
800 #ifndef REG_CLASS_FROM_CONSTRAINT
801 #define REG_CLASS_FROM_CONSTRAINT(C,STR) REG_CLASS_FROM_LETTER (C)
804 #if defined (EXTRA_CONSTRAINT) && ! defined (EXTRA_CONSTRAINT_STR)
805 #define EXTRA_CONSTRAINT_STR(OP, C,STR) EXTRA_CONSTRAINT (OP, C)
808 #endif /* old constraint mechanism in use */
810 #ifndef REGISTER_MOVE_COST
811 #define REGISTER_MOVE_COST(m, x, y) 2
814 /* Determine whether the entire c99 runtime
815 is present in the runtime library. */
816 #ifndef TARGET_C99_FUNCTIONS
817 #define TARGET_C99_FUNCTIONS 0
820 /* Determine whether the target runtime library has
821 a sincos implementation following the GNU extension. */
822 #ifndef TARGET_HAS_SINCOS
823 #define TARGET_HAS_SINCOS 0
826 /* Indicate that CLZ and CTZ are undefined at zero. */
827 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
828 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
830 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
831 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
834 /* Provide a default value for STORE_FLAG_VALUE. */
835 #ifndef STORE_FLAG_VALUE
836 #define STORE_FLAG_VALUE 1
839 /* This macro is used to determine what the largest unit size that
840 move_by_pieces can use is. */
842 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
843 move efficiently, as opposed to MOVE_MAX which is the maximum
844 number of bytes we can move with a single instruction. */
846 #ifndef MOVE_MAX_PIECES
847 #define MOVE_MAX_PIECES MOVE_MAX
850 #ifndef STACK_POINTER_OFFSET
851 #define STACK_POINTER_OFFSET 0
855 #define LOCAL_REGNO(REGNO) 0
858 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
859 the stack pointer does not matter. The value is tested only in
860 functions that have frame pointers. */
861 #ifndef EXIT_IGNORE_STACK
862 #define EXIT_IGNORE_STACK 0
865 /* Assume that case vectors are not pc-relative. */
866 #ifndef CASE_VECTOR_PC_RELATIVE
867 #define CASE_VECTOR_PC_RELATIVE 0
870 /* Assume that trampolines need function alignment. */
871 #ifndef TRAMPOLINE_ALIGNMENT
872 #define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY
875 /* Register mappings for target machines without register windows. */
876 #ifndef INCOMING_REGNO
877 #define INCOMING_REGNO(N) (N)
880 #ifndef OUTGOING_REGNO
881 #define OUTGOING_REGNO(N) (N)
884 #ifndef SHIFT_COUNT_TRUNCATED
885 #define SHIFT_COUNT_TRUNCATED 0
888 #ifndef LEGITIMIZE_ADDRESS
889 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)
892 #ifndef LEGITIMATE_PIC_OPERAND_P
893 #define LEGITIMATE_PIC_OPERAND_P(X) 1
896 #ifndef TARGET_MEM_CONSTRAINT
897 #define TARGET_MEM_CONSTRAINT 'm'
900 #ifndef REVERSIBLE_CC_MODE
901 #define REVERSIBLE_CC_MODE(MODE) 0
904 /* Biggest alignment supported by the object file format of this machine. */
905 #ifndef MAX_OFILE_ALIGNMENT
906 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
909 #ifndef FRAME_GROWS_DOWNWARD
910 #define FRAME_GROWS_DOWNWARD 0
913 /* On most machines, the CFA coincides with the first incoming parm. */
914 #ifndef ARG_POINTER_CFA_OFFSET
915 #define ARG_POINTER_CFA_OFFSET(FNDECL) FIRST_PARM_OFFSET (FNDECL)
918 /* On most machines, we use the CFA as DW_AT_frame_base. */
919 #ifndef CFA_FRAME_BASE_OFFSET
920 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0
923 /* The offset from the incoming value of %sp to the top of the stack frame
924 for the current function. */
925 #ifndef INCOMING_FRAME_SP_OFFSET
926 #define INCOMING_FRAME_SP_OFFSET 0
929 #ifndef HARD_REGNO_NREGS_HAS_PADDING
930 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
931 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
934 #ifndef OUTGOING_REG_PARM_STACK_SPACE
935 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
938 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
939 the backend. MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
940 effort stack alignment supported by the backend. If the backend
941 supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
942 MAX_STACK_ALIGNMENT are the same. Otherwise, the incoming stack
943 boundary will limit the maximum guaranteed stack alignment. */
944 #ifdef MAX_STACK_ALIGNMENT
945 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
947 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY
948 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
951 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
953 #ifndef LOCAL_ALIGNMENT
954 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
957 #ifndef STACK_SLOT_ALIGNMENT
958 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
959 ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
962 #ifndef LOCAL_DECL_ALIGNMENT
963 #define LOCAL_DECL_ALIGNMENT(DECL) \
964 LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
967 /* Alignment value for attribute ((aligned)). */
968 #ifndef ATTRIBUTE_ALIGNED_VALUE
969 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
972 #endif /* ! GCC_DEFAULTS_H */