1 /* Definitions of various defaults for tm.h macros.
2 Copyright (C) 1992, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
3 2005, 2007, 2008, 2009, 2010, 2011
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 /* How to start an assembler comment. */
32 #ifndef ASM_COMMENT_START
33 #define ASM_COMMENT_START ";#"
36 /* Store in OUTPUT a string (made with alloca) containing an
37 assembler-name for a local static variable or function named NAME.
38 LABELNO is an integer which is different for each call. */
41 # ifndef NO_DOT_IN_LABEL
42 # define ASM_PN_FORMAT "%s.%lu"
44 # ifndef NO_DOLLAR_IN_LABEL
45 # define ASM_PN_FORMAT "%s$%lu"
47 # define ASM_PN_FORMAT "__%s_%lu"
50 #endif /* ! ASM_PN_FORMAT */
52 #ifndef ASM_FORMAT_PRIVATE_NAME
53 # define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
54 do { const char *const name_ = (NAME); \
55 char *const output_ = (OUTPUT) = \
56 (char *) alloca (strlen (name_) + 32); \
57 sprintf (output_, ASM_PN_FORMAT, name_, (unsigned long)(LABELNO)); \
61 /* Choose a reasonable default for ASM_OUTPUT_ASCII. */
63 #ifndef ASM_OUTPUT_ASCII
64 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
66 FILE *_hide_asm_out_file = (MYFILE); \
67 const unsigned char *_hide_p = (const unsigned char *) (MYSTRING); \
68 int _hide_thissize = (MYLENGTH); \
70 FILE *asm_out_file = _hide_asm_out_file; \
71 const unsigned char *p = _hide_p; \
72 int thissize = _hide_thissize; \
74 fprintf (asm_out_file, "\t.ascii \""); \
76 for (i = 0; i < thissize; i++) \
79 if (c == '\"' || c == '\\') \
80 putc ('\\', asm_out_file); \
82 putc (c, asm_out_file); \
85 fprintf (asm_out_file, "\\%o", c); \
86 /* After an octal-escape, if a digit follows, \
87 terminate one string constant and start another. \
88 The VAX assembler fails to stop reading the escape \
89 after three digits, so this is the only way we \
90 can get it to parse the data properly. */ \
91 if (i < thissize - 1 && ISDIGIT(p[i + 1])) \
92 fprintf (asm_out_file, "\"\n\t.ascii \""); \
95 fprintf (asm_out_file, "\"\n"); \
101 /* This is how we tell the assembler to equate two values. */
103 #ifndef ASM_OUTPUT_DEF
104 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
105 do { fprintf ((FILE), "%s", SET_ASM_OP); \
106 assemble_name (FILE, LABEL1); \
107 fprintf (FILE, ","); \
108 assemble_name (FILE, LABEL2); \
109 fprintf (FILE, "\n"); \
114 #ifndef IFUNC_ASM_TYPE
115 #define IFUNC_ASM_TYPE "gnu_indirect_function"
118 #ifndef TLS_COMMON_ASM_OP
119 #define TLS_COMMON_ASM_OP ".tls_common"
122 #if defined (HAVE_AS_TLS) && !defined (ASM_OUTPUT_TLS_COMMON)
123 #define ASM_OUTPUT_TLS_COMMON(FILE, DECL, NAME, SIZE) \
126 fprintf ((FILE), "\t%s\t", TLS_COMMON_ASM_OP); \
127 assemble_name ((FILE), (NAME)); \
128 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", \
129 (SIZE), DECL_ALIGN (DECL) / BITS_PER_UNIT); \
134 /* Decide whether to defer emitting the assembler output for an equate
135 of two values. The default is to not defer output. */
136 #ifndef TARGET_DEFERRED_OUTPUT_DEFS
137 #define TARGET_DEFERRED_OUTPUT_DEFS(DECL,TARGET) false
140 /* This is how to output the definition of a user-level label named
141 NAME, such as the label on 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 the definition of a user-level label named
149 NAME, such as the label on a function. */
151 #ifndef ASM_OUTPUT_FUNCTION_LABEL
152 #define ASM_OUTPUT_FUNCTION_LABEL(FILE, NAME, DECL) \
153 ASM_OUTPUT_LABEL ((FILE), (NAME))
156 /* Output the definition of a compiler-generated label named NAME. */
157 #ifndef ASM_OUTPUT_INTERNAL_LABEL
158 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,NAME) \
160 assemble_name_raw ((FILE), (NAME)); \
161 fputs (":\n", (FILE)); \
165 /* This is how to output a reference to a user-level label named NAME. */
167 #ifndef ASM_OUTPUT_LABELREF
168 #define ASM_OUTPUT_LABELREF(FILE,NAME) asm_fprintf ((FILE), "%U%s", (NAME))
171 /* Allow target to print debug info labels specially. This is useful for
172 VLIW targets, since debug info labels should go into the middle of
173 instruction bundles instead of breaking them. */
175 #ifndef ASM_OUTPUT_DEBUG_LABEL
176 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
177 (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM)
180 /* This is how we tell the assembler that a symbol is weak. */
181 #ifndef ASM_OUTPUT_WEAK_ALIAS
182 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
183 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE) \
186 ASM_WEAKEN_LABEL (STREAM, NAME); \
188 ASM_OUTPUT_DEF (STREAM, NAME, VALUE); \
194 /* This is how we tell the assembler that a symbol is a weak alias to
195 another symbol that doesn't require the other symbol to be defined.
196 Uses of the former will turn into weak uses of the latter, i.e.,
197 uses that, in case the latter is undefined, will not cause errors,
198 and will add it to the symbol table as weak undefined. However, if
199 the latter is referenced directly, a strong reference prevails. */
200 #ifndef ASM_OUTPUT_WEAKREF
201 #if defined HAVE_GAS_WEAKREF
202 #define ASM_OUTPUT_WEAKREF(FILE, DECL, NAME, VALUE) \
205 fprintf ((FILE), "\t.weakref\t"); \
206 assemble_name ((FILE), (NAME)); \
207 fprintf ((FILE), ","); \
208 assemble_name ((FILE), (VALUE)); \
209 fprintf ((FILE), "\n"); \
215 /* How to emit a .type directive. */
216 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE
217 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT
218 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE) \
221 fputs (TYPE_ASM_OP, STREAM); \
222 assemble_name (STREAM, NAME); \
223 fputs (", ", STREAM); \
224 fprintf (STREAM, TYPE_OPERAND_FMT, TYPE); \
225 putc ('\n', STREAM); \
231 /* How to emit a .size directive. */
232 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE
234 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE) \
237 HOST_WIDE_INT size_ = (SIZE); \
238 fputs (SIZE_ASM_OP, STREAM); \
239 assemble_name (STREAM, NAME); \
240 fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \
244 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME) \
247 fputs (SIZE_ASM_OP, STREAM); \
248 assemble_name (STREAM, NAME); \
249 fputs (", .-", STREAM); \
250 assemble_name (STREAM, NAME); \
251 putc ('\n', STREAM); \
258 /* This determines whether or not we support weak symbols. SUPPORTS_WEAK
259 must be a preprocessor constant. */
260 #ifndef SUPPORTS_WEAK
261 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
262 #define SUPPORTS_WEAK 1
264 #define SUPPORTS_WEAK 0
268 /* This determines whether or not we support weak symbols during target
269 code generation. TARGET_SUPPORTS_WEAK can be any valid C expression. */
270 #ifndef TARGET_SUPPORTS_WEAK
271 #define TARGET_SUPPORTS_WEAK (SUPPORTS_WEAK)
274 /* This determines whether or not we support the discriminator
275 attribute in the .loc directive. */
276 #ifndef SUPPORTS_DISCRIMINATOR
277 #ifdef HAVE_GAS_DISCRIMINATOR
278 #define SUPPORTS_DISCRIMINATOR 1
280 #define SUPPORTS_DISCRIMINATOR 0
284 /* This determines whether or not we support link-once semantics. */
285 #ifndef SUPPORTS_ONE_ONLY
286 #ifdef MAKE_DECL_ONE_ONLY
287 #define SUPPORTS_ONE_ONLY 1
289 #define SUPPORTS_ONE_ONLY 0
293 /* This determines whether weak symbols must be left out of a static
294 archive's table of contents. Defining this macro to be nonzero has
295 the consequence that certain symbols will not be made weak that
296 otherwise would be. The C++ ABI requires this macro to be zero;
297 see the documentation. */
298 #ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
299 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
302 /* This determines whether or not we need linkonce unwind information. */
303 #ifndef TARGET_USES_WEAK_UNWIND_INFO
304 #define TARGET_USES_WEAK_UNWIND_INFO 0
307 /* By default, there is no prefix on user-defined symbols. */
308 #ifndef USER_LABEL_PREFIX
309 #define USER_LABEL_PREFIX ""
312 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
313 provide a weak attribute. Else define it to nothing.
315 This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
316 not available at that time.
318 Note, this is only for use by target files which we know are to be
320 #ifndef TARGET_ATTRIBUTE_WEAK
322 # define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
324 # define TARGET_ATTRIBUTE_WEAK
328 /* Determines whether we may use common symbols to represent one-only
329 semantics (a.k.a. "vague linkage"). */
330 #ifndef USE_COMMON_FOR_ONE_ONLY
331 # define USE_COMMON_FOR_ONE_ONLY 1
334 /* By default we can assume that all global symbols are in one namespace,
335 across all shared libraries. */
336 #ifndef MULTIPLE_SYMBOL_SPACES
337 # define MULTIPLE_SYMBOL_SPACES 0
340 /* If the target supports init_priority C++ attribute, give
341 SUPPORTS_INIT_PRIORITY a nonzero value. */
342 #ifndef SUPPORTS_INIT_PRIORITY
343 #define SUPPORTS_INIT_PRIORITY 1
344 #endif /* SUPPORTS_INIT_PRIORITY */
346 /* If duplicate library search directories can be removed from a
347 linker command without changing the linker's semantics, give this
349 #ifndef LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
350 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 0
351 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
353 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
354 the rest of the DWARF 2 frame unwind support is also provided. */
355 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
356 #define DWARF2_UNWIND_INFO 1
359 /* If we have named sections, and we're using crtstuff to run ctors,
360 use them for registering eh frame information. */
361 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
362 && !defined(EH_FRAME_IN_DATA_SECTION)
363 #ifndef EH_FRAME_SECTION_NAME
364 #define EH_FRAME_SECTION_NAME ".eh_frame"
368 /* On many systems, different EH table encodings are used under
369 difference circumstances. Some will require runtime relocations;
370 some will not. For those that do not require runtime relocations,
371 we would like to make the table read-only. However, since the
372 read-only tables may need to be combined with read-write tables
373 that do require runtime relocation, it is not safe to make the
374 tables read-only unless the linker will merge read-only and
375 read-write sections into a single read-write section. If your
376 linker does not have this ability, but your system is such that no
377 encoding used with non-PIC code will ever require a runtime
378 relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in
379 your target configuration file. */
380 #ifndef EH_TABLES_CAN_BE_READ_ONLY
381 #ifdef HAVE_LD_RO_RW_SECTION_MIXING
382 #define EH_TABLES_CAN_BE_READ_ONLY 1
384 #define EH_TABLES_CAN_BE_READ_ONLY 0
388 /* If we have named section and we support weak symbols, then use the
389 .jcr section for recording java classes which need to be registered
390 at program start-up time. */
391 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
392 #ifndef JCR_SECTION_NAME
393 #define JCR_SECTION_NAME ".jcr"
397 /* This decision to use a .jcr section can be overridden by defining
398 USE_JCR_SECTION to 0 in target file. This is necessary if target
399 can define JCR_SECTION_NAME but does not have crtstuff or
400 linker support for .jcr section. */
401 #ifndef TARGET_USE_JCR_SECTION
402 #ifdef JCR_SECTION_NAME
403 #define TARGET_USE_JCR_SECTION 1
405 #define TARGET_USE_JCR_SECTION 0
409 /* Number of hardware registers that go into the DWARF-2 unwind info.
410 If not defined, equals FIRST_PSEUDO_REGISTER */
412 #ifndef DWARF_FRAME_REGISTERS
413 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
416 /* Offsets recorded in opcodes are a multiple of this alignment factor. */
417 #ifndef DWARF_CIE_DATA_ALIGNMENT
418 #ifdef STACK_GROWS_DOWNWARD
419 #define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD))
421 #define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD)
425 /* The DWARF 2 CFA column which tracks the return address. Normally this
426 is the column for PC, or the first column after all of the hard
428 #ifndef DWARF_FRAME_RETURN_COLUMN
430 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM)
432 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGISTERS
436 /* How to renumber registers for dbx and gdb. If not defined, assume
437 no renumbering is necessary. */
439 #ifndef DBX_REGISTER_NUMBER
440 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
443 /* The mapping from gcc register number to DWARF 2 CFA column number.
444 By default, we just provide columns for all registers. */
445 #ifndef DWARF_FRAME_REGNUM
446 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
449 /* Map register numbers held in the call frame info that gcc has
450 collected using DWARF_FRAME_REGNUM to those that should be output in
451 .debug_frame and .eh_frame. */
452 #ifndef DWARF2_FRAME_REG_OUT
453 #define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) (REGNO)
456 /* Default sizes for base C types. If the sizes are different for
457 your target, you should override these values by defining the
458 appropriate symbols in your tm.h file. */
460 #ifndef BITS_PER_UNIT
461 #define BITS_PER_UNIT 8
464 #ifndef BITS_PER_WORD
465 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
468 #ifndef CHAR_TYPE_SIZE
469 #define CHAR_TYPE_SIZE BITS_PER_UNIT
472 #ifndef BOOL_TYPE_SIZE
473 /* `bool' has size and alignment `1', on almost all platforms. */
474 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
477 #ifndef SHORT_TYPE_SIZE
478 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
481 #ifndef INT_TYPE_SIZE
482 #define INT_TYPE_SIZE BITS_PER_WORD
485 #ifndef LONG_TYPE_SIZE
486 #define LONG_TYPE_SIZE BITS_PER_WORD
489 #ifndef LONG_LONG_TYPE_SIZE
490 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
493 #ifndef WCHAR_TYPE_SIZE
494 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
497 #ifndef FLOAT_TYPE_SIZE
498 #define FLOAT_TYPE_SIZE BITS_PER_WORD
501 #ifndef DOUBLE_TYPE_SIZE
502 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
505 #ifndef LONG_DOUBLE_TYPE_SIZE
506 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
509 #ifndef DECIMAL32_TYPE_SIZE
510 #define DECIMAL32_TYPE_SIZE 32
513 #ifndef DECIMAL64_TYPE_SIZE
514 #define DECIMAL64_TYPE_SIZE 64
517 #ifndef DECIMAL128_TYPE_SIZE
518 #define DECIMAL128_TYPE_SIZE 128
521 #ifndef SHORT_FRACT_TYPE_SIZE
522 #define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT
525 #ifndef FRACT_TYPE_SIZE
526 #define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2)
529 #ifndef LONG_FRACT_TYPE_SIZE
530 #define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4)
533 #ifndef LONG_LONG_FRACT_TYPE_SIZE
534 #define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8)
537 #ifndef SHORT_ACCUM_TYPE_SIZE
538 #define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2)
541 #ifndef ACCUM_TYPE_SIZE
542 #define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2)
545 #ifndef LONG_ACCUM_TYPE_SIZE
546 #define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2)
549 #ifndef LONG_LONG_ACCUM_TYPE_SIZE
550 #define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2)
553 /* We let tm.h override the types used here, to handle trivial differences
554 such as the choice of unsigned int or long unsigned int for size_t.
555 When machines start needing nontrivial differences in the size type,
556 it would be best to do something here to figure out automatically
557 from other information what type to use. */
560 #define SIZE_TYPE "long unsigned int"
564 #define PID_TYPE "int"
567 /* If GCC knows the exact uint_least16_t and uint_least32_t types from
568 <stdint.h>, use them for char16_t and char32_t. Otherwise, use
569 these guesses; getting the wrong type of a given width will not
570 affect C++ name mangling because in C++ these are distinct types
573 #ifdef UINT_LEAST16_TYPE
574 #define CHAR16_TYPE UINT_LEAST16_TYPE
576 #define CHAR16_TYPE "short unsigned int"
579 #ifdef UINT_LEAST32_TYPE
580 #define CHAR32_TYPE UINT_LEAST32_TYPE
582 #define CHAR32_TYPE "unsigned int"
586 #define WCHAR_TYPE "int"
589 /* WCHAR_TYPE gets overridden by -fshort-wchar. */
590 #define MODIFIED_WCHAR_TYPE \
591 (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE)
594 #define PTRDIFF_TYPE "long int"
598 #define WINT_TYPE "unsigned int"
602 #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
604 : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
610 #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
612 : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
613 ? "long unsigned int" \
614 : "long long unsigned int"))
618 /* There are no default definitions of these <stdint.h> types. */
620 #ifndef SIG_ATOMIC_TYPE
621 #define SIG_ATOMIC_TYPE ((const char *) NULL)
625 #define INT8_TYPE ((const char *) NULL)
629 #define INT16_TYPE ((const char *) NULL)
633 #define INT32_TYPE ((const char *) NULL)
637 #define INT64_TYPE ((const char *) NULL)
641 #define UINT8_TYPE ((const char *) NULL)
645 #define UINT16_TYPE ((const char *) NULL)
649 #define UINT32_TYPE ((const char *) NULL)
653 #define UINT64_TYPE ((const char *) NULL)
656 #ifndef INT_LEAST8_TYPE
657 #define INT_LEAST8_TYPE ((const char *) NULL)
660 #ifndef INT_LEAST16_TYPE
661 #define INT_LEAST16_TYPE ((const char *) NULL)
664 #ifndef INT_LEAST32_TYPE
665 #define INT_LEAST32_TYPE ((const char *) NULL)
668 #ifndef INT_LEAST64_TYPE
669 #define INT_LEAST64_TYPE ((const char *) NULL)
672 #ifndef UINT_LEAST8_TYPE
673 #define UINT_LEAST8_TYPE ((const char *) NULL)
676 #ifndef UINT_LEAST16_TYPE
677 #define UINT_LEAST16_TYPE ((const char *) NULL)
680 #ifndef UINT_LEAST32_TYPE
681 #define UINT_LEAST32_TYPE ((const char *) NULL)
684 #ifndef UINT_LEAST64_TYPE
685 #define UINT_LEAST64_TYPE ((const char *) NULL)
688 #ifndef INT_FAST8_TYPE
689 #define INT_FAST8_TYPE ((const char *) NULL)
692 #ifndef INT_FAST16_TYPE
693 #define INT_FAST16_TYPE ((const char *) NULL)
696 #ifndef INT_FAST32_TYPE
697 #define INT_FAST32_TYPE ((const char *) NULL)
700 #ifndef INT_FAST64_TYPE
701 #define INT_FAST64_TYPE ((const char *) NULL)
704 #ifndef UINT_FAST8_TYPE
705 #define UINT_FAST8_TYPE ((const char *) NULL)
708 #ifndef UINT_FAST16_TYPE
709 #define UINT_FAST16_TYPE ((const char *) NULL)
712 #ifndef UINT_FAST32_TYPE
713 #define UINT_FAST32_TYPE ((const char *) NULL)
716 #ifndef UINT_FAST64_TYPE
717 #define UINT_FAST64_TYPE ((const char *) NULL)
721 #define INTPTR_TYPE ((const char *) NULL)
725 #define UINTPTR_TYPE ((const char *) NULL)
728 /* Width in bits of a pointer. Mind the value of the macro `Pmode'. */
730 #define POINTER_SIZE BITS_PER_WORD
733 #ifndef PIC_OFFSET_TABLE_REGNUM
734 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
737 #ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
738 #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 0
741 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
742 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
745 #ifndef TARGET_DECLSPEC
746 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
747 /* If the target supports the "dllimport" attribute, users are
748 probably used to the "__declspec" syntax. */
749 #define TARGET_DECLSPEC 1
751 #define TARGET_DECLSPEC 0
755 /* By default, the preprocessor should be invoked the same way in C++
757 #ifndef CPLUSPLUS_CPP_SPEC
759 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
763 #ifndef ACCUMULATE_OUTGOING_ARGS
764 #define ACCUMULATE_OUTGOING_ARGS 0
767 /* Supply a default definition for PUSH_ARGS. */
770 #define PUSH_ARGS !ACCUMULATE_OUTGOING_ARGS
776 /* Decide whether a function's arguments should be processed
777 from first to last or from last to first.
779 They should if the stack and args grow in opposite directions, but
780 only if we have push insns. */
784 #ifndef PUSH_ARGS_REVERSED
785 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
786 #define PUSH_ARGS_REVERSED PUSH_ARGS
792 #ifndef PUSH_ARGS_REVERSED
793 #define PUSH_ARGS_REVERSED 0
796 /* Default value for the alignment (in bits) a C conformant malloc has to
797 provide. This default is intended to be safe and always correct. */
798 #ifndef MALLOC_ABI_ALIGNMENT
799 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
802 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
803 STACK_BOUNDARY is required. */
804 #ifndef PREFERRED_STACK_BOUNDARY
805 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
808 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not
810 #ifndef INCOMING_STACK_BOUNDARY
811 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY
814 #ifndef TARGET_DEFAULT_PACK_STRUCT
815 #define TARGET_DEFAULT_PACK_STRUCT 0
818 /* By default, the vtable entries are void pointers, the so the alignment
819 is the same as pointer alignment. The value of this macro specifies
820 the alignment of the vtable entry in bits. It should be defined only
821 when special alignment is necessary. */
822 #ifndef TARGET_VTABLE_ENTRY_ALIGN
823 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
826 /* There are a few non-descriptor entries in the vtable at offsets below
827 zero. If these entries must be padded (say, to preserve the alignment
828 specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
829 words in each data entry. */
830 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
831 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
834 /* Decide whether it is safe to use a local alias for a virtual function
835 when constructing thunks. */
836 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
837 #ifdef ASM_OUTPUT_DEF
838 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
840 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
844 /* Select a format to encode pointers in exception handling data. We
845 prefer those that result in fewer dynamic relocations. Assume no
846 special support here and encode direct references. */
847 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
848 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) DW_EH_PE_absptr
851 /* By default, the C++ compiler will use the lowest bit of the pointer
852 to function to indicate a pointer-to-member-function points to a
853 virtual member function. However, if FUNCTION_BOUNDARY indicates
854 function addresses aren't always even, the lowest bit of the delta
855 field will be used. */
856 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
857 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
858 (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
859 ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
862 #ifndef DEFAULT_GDB_EXTENSIONS
863 #define DEFAULT_GDB_EXTENSIONS 1
866 /* If more than one debugging type is supported, you must define
867 PREFERRED_DEBUGGING_TYPE to choose the default. */
869 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
870 + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
871 + defined (VMS_DEBUGGING_INFO))
872 #ifndef PREFERRED_DEBUGGING_TYPE
873 #error You must define PREFERRED_DEBUGGING_TYPE
874 #endif /* no PREFERRED_DEBUGGING_TYPE */
876 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
877 here so other code needn't care. */
878 #elif defined DBX_DEBUGGING_INFO
879 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
881 #elif defined SDB_DEBUGGING_INFO
882 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
884 #elif defined DWARF2_DEBUGGING_INFO
885 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
887 #elif defined VMS_DEBUGGING_INFO
888 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
890 #elif defined XCOFF_DEBUGGING_INFO
891 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
894 /* No debugging format is supported by this target. */
895 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
898 #ifndef LARGEST_EXPONENT_IS_NORMAL
899 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
902 #ifndef ROUND_TOWARDS_ZERO
903 #define ROUND_TOWARDS_ZERO 0
906 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
907 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
910 /* True if the targets integer-comparison functions return { 0, 1, 2
911 } to indicate { <, ==, > }. False if { -1, 0, 1 } is used
912 instead. The libgcc routines are biased. */
913 #ifndef TARGET_LIB_INT_CMP_BIASED
914 #define TARGET_LIB_INT_CMP_BIASED (true)
917 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
918 then the word-endianness is the same as for integers. */
919 #ifndef FLOAT_WORDS_BIG_ENDIAN
920 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
923 #ifndef REG_WORDS_BIG_ENDIAN
924 #define REG_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
927 #ifdef TARGET_FLT_EVAL_METHOD
928 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 1
930 #define TARGET_FLT_EVAL_METHOD 0
931 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 0
934 #ifndef TARGET_DEC_EVAL_METHOD
935 #define TARGET_DEC_EVAL_METHOD 2
938 #ifndef HAS_LONG_COND_BRANCH
939 #define HAS_LONG_COND_BRANCH 0
942 #ifndef HAS_LONG_UNCOND_BRANCH
943 #define HAS_LONG_UNCOND_BRANCH 0
946 /* Determine whether __cxa_atexit, rather than atexit, is used to
947 register C++ destructors for local statics and global objects. */
948 #ifndef DEFAULT_USE_CXA_ATEXIT
949 #define DEFAULT_USE_CXA_ATEXIT 0
952 /* If none of these macros are defined, the port must use the new
953 technique of defining constraints in the machine description.
954 tm_p.h will define those macros that machine-independent code
956 #if !defined CONSTRAINT_LEN \
957 && !defined REG_CLASS_FROM_LETTER \
958 && !defined REG_CLASS_FROM_CONSTRAINT \
959 && !defined CONST_OK_FOR_LETTER_P \
960 && !defined CONST_OK_FOR_CONSTRAINT_P \
961 && !defined CONST_DOUBLE_OK_FOR_LETTER_P \
962 && !defined CONST_DOUBLE_OK_FOR_CONSTRAINT_P \
963 && !defined EXTRA_CONSTRAINT \
964 && !defined EXTRA_CONSTRAINT_STR \
965 && !defined EXTRA_MEMORY_CONSTRAINT \
966 && !defined EXTRA_ADDRESS_CONSTRAINT
968 #define USE_MD_CONSTRAINTS
970 #if GCC_VERSION >= 3000 && defined IN_GCC
971 /* These old constraint macros shouldn't appear anywhere in a
972 configuration using MD constraint definitions. */
973 #pragma GCC poison REG_CLASS_FROM_LETTER CONST_OK_FOR_LETTER_P \
974 CONST_DOUBLE_OK_FOR_LETTER_P EXTRA_CONSTRAINT
977 #else /* old constraint mechanism in use */
979 /* Determine whether extra constraint letter should be handled
980 via address reload (like 'o'). */
981 #ifndef EXTRA_MEMORY_CONSTRAINT
982 #define EXTRA_MEMORY_CONSTRAINT(C,STR) 0
985 /* Determine whether extra constraint letter should be handled
986 as an address (like 'p'). */
987 #ifndef EXTRA_ADDRESS_CONSTRAINT
988 #define EXTRA_ADDRESS_CONSTRAINT(C,STR) 0
991 /* When a port defines CONSTRAINT_LEN, it should use DEFAULT_CONSTRAINT_LEN
992 for all the characters that it does not want to change, so things like the
993 'length' of a digit in a matching constraint is an implementation detail,
994 and not part of the interface. */
995 #define DEFAULT_CONSTRAINT_LEN(C,STR) 1
997 #ifndef CONSTRAINT_LEN
998 #define CONSTRAINT_LEN(C,STR) DEFAULT_CONSTRAINT_LEN (C, STR)
1001 #if defined (CONST_OK_FOR_LETTER_P) && ! defined (CONST_OK_FOR_CONSTRAINT_P)
1002 #define CONST_OK_FOR_CONSTRAINT_P(VAL,C,STR) CONST_OK_FOR_LETTER_P (VAL, C)
1005 #if defined (CONST_DOUBLE_OK_FOR_LETTER_P) && ! defined (CONST_DOUBLE_OK_FOR_CONSTRAINT_P)
1006 #define CONST_DOUBLE_OK_FOR_CONSTRAINT_P(OP,C,STR) \
1007 CONST_DOUBLE_OK_FOR_LETTER_P (OP, C)
1010 #ifndef REG_CLASS_FROM_CONSTRAINT
1011 #define REG_CLASS_FROM_CONSTRAINT(C,STR) REG_CLASS_FROM_LETTER (C)
1014 #if defined (EXTRA_CONSTRAINT) && ! defined (EXTRA_CONSTRAINT_STR)
1015 #define EXTRA_CONSTRAINT_STR(OP, C,STR) EXTRA_CONSTRAINT (OP, C)
1018 #endif /* old constraint mechanism in use */
1020 /* Determine whether the entire c99 runtime
1021 is present in the runtime library. */
1022 #ifndef TARGET_C99_FUNCTIONS
1023 #define TARGET_C99_FUNCTIONS 0
1026 /* Determine whether the target runtime library has
1027 a sincos implementation following the GNU extension. */
1028 #ifndef TARGET_HAS_SINCOS
1029 #define TARGET_HAS_SINCOS 0
1032 /* Indicate that CLZ and CTZ are undefined at zero. */
1033 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
1034 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
1036 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
1037 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
1040 /* Provide a default value for STORE_FLAG_VALUE. */
1041 #ifndef STORE_FLAG_VALUE
1042 #define STORE_FLAG_VALUE 1
1045 /* This macro is used to determine what the largest unit size that
1046 move_by_pieces can use is. */
1048 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
1049 move efficiently, as opposed to MOVE_MAX which is the maximum
1050 number of bytes we can move with a single instruction. */
1052 #ifndef MOVE_MAX_PIECES
1053 #define MOVE_MAX_PIECES MOVE_MAX
1056 #ifndef MAX_MOVE_MAX
1057 #define MAX_MOVE_MAX MOVE_MAX
1060 #ifndef MIN_UNITS_PER_WORD
1061 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
1064 #ifndef MAX_BITS_PER_WORD
1065 #define MAX_BITS_PER_WORD BITS_PER_WORD
1068 #ifndef STACK_POINTER_OFFSET
1069 #define STACK_POINTER_OFFSET 0
1073 #define LOCAL_REGNO(REGNO) 0
1076 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1077 the stack pointer does not matter. The value is tested only in
1078 functions that have frame pointers. */
1079 #ifndef EXIT_IGNORE_STACK
1080 #define EXIT_IGNORE_STACK 0
1083 /* Assume that case vectors are not pc-relative. */
1084 #ifndef CASE_VECTOR_PC_RELATIVE
1085 #define CASE_VECTOR_PC_RELATIVE 0
1088 /* Assume that trampolines need function alignment. */
1089 #ifndef TRAMPOLINE_ALIGNMENT
1090 #define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY
1093 /* Register mappings for target machines without register windows. */
1094 #ifndef INCOMING_REGNO
1095 #define INCOMING_REGNO(N) (N)
1098 #ifndef OUTGOING_REGNO
1099 #define OUTGOING_REGNO(N) (N)
1102 #ifndef SHIFT_COUNT_TRUNCATED
1103 #define SHIFT_COUNT_TRUNCATED 0
1106 #ifndef LEGITIMATE_PIC_OPERAND_P
1107 #define LEGITIMATE_PIC_OPERAND_P(X) 1
1110 #ifndef TARGET_MEM_CONSTRAINT
1111 #define TARGET_MEM_CONSTRAINT 'm'
1114 #ifndef REVERSIBLE_CC_MODE
1115 #define REVERSIBLE_CC_MODE(MODE) 0
1118 /* Biggest alignment supported by the object file format of this machine. */
1119 #ifndef MAX_OFILE_ALIGNMENT
1120 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
1123 #ifndef FRAME_GROWS_DOWNWARD
1124 #define FRAME_GROWS_DOWNWARD 0
1127 /* On most machines, the CFA coincides with the first incoming parm. */
1128 #ifndef ARG_POINTER_CFA_OFFSET
1129 #define ARG_POINTER_CFA_OFFSET(FNDECL) \
1130 (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
1133 /* On most machines, we use the CFA as DW_AT_frame_base. */
1134 #ifndef CFA_FRAME_BASE_OFFSET
1135 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0
1138 /* The offset from the incoming value of %sp to the top of the stack frame
1139 for the current function. */
1140 #ifndef INCOMING_FRAME_SP_OFFSET
1141 #define INCOMING_FRAME_SP_OFFSET 0
1144 #ifndef HARD_REGNO_NREGS_HAS_PADDING
1145 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
1146 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
1149 #ifndef OUTGOING_REG_PARM_STACK_SPACE
1150 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
1153 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
1154 the backend. MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
1155 effort stack alignment supported by the backend. If the backend
1156 supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
1157 MAX_STACK_ALIGNMENT are the same. Otherwise, the incoming stack
1158 boundary will limit the maximum guaranteed stack alignment. */
1159 #ifdef MAX_STACK_ALIGNMENT
1160 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
1162 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY
1163 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
1166 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
1168 #ifndef LOCAL_ALIGNMENT
1169 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
1172 #ifndef STACK_SLOT_ALIGNMENT
1173 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
1174 ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
1177 #ifndef LOCAL_DECL_ALIGNMENT
1178 #define LOCAL_DECL_ALIGNMENT(DECL) \
1179 LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
1182 #ifndef MINIMUM_ALIGNMENT
1183 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN)
1186 /* Alignment value for attribute ((aligned)). */
1187 #ifndef ATTRIBUTE_ALIGNED_VALUE
1188 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
1191 /* Many ports have no mode-dependent addresses (except possibly autoincrement
1192 and autodecrement addresses, which are handled by target-independent code
1194 #ifndef GO_IF_MODE_DEPENDENT_ADDRESS
1195 #define GO_IF_MODE_DEPENDENT_ADDRESS(X, WIN)
1198 /* For most ports anything that evaluates to a constant symbolic
1199 or integer value is acceptable as a constant address. */
1200 #ifndef CONSTANT_ADDRESS_P
1201 #define CONSTANT_ADDRESS_P(X) (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE)
1204 #ifndef MAX_FIXED_MODE_SIZE
1205 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
1208 /* Nonzero if structures and unions should be returned in memory.
1210 This should only be defined if compatibility with another compiler or
1211 with an ABI is needed, because it results in slower code. */
1213 #ifndef DEFAULT_PCC_STRUCT_RETURN
1214 #define DEFAULT_PCC_STRUCT_RETURN 1
1217 #ifdef GCC_INSN_FLAGS_H
1218 /* Dependent default target macro definitions
1220 This section of defaults.h defines target macros that depend on generated
1221 headers. This is a bit awkward: We want to put all default definitions
1222 for target macros in defaults.h, but some of the defaults depend on the
1223 HAVE_* flags defines of insn-flags.h. But insn-flags.h is not always
1224 included by files that do include defaults.h.
1226 Fortunately, the default macro definitions that depend on the HAVE_*
1227 macros are also the ones that will only be used inside GCC itself, i.e.
1228 not in the gen* programs or in target objects like libgcc.
1230 Obviously, it would be best to keep this section of defaults.h as small
1231 as possible, by converting the macros defined below to target hooks or
1235 /* The default branch cost is 1. */
1237 #define BRANCH_COST(speed_p, predictable_p) 1
1240 /* If a memory-to-memory move would take MOVE_RATIO or more simple
1241 move-instruction sequences, we will do a movmem or libcall instead. */
1244 #if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti)
1245 #define MOVE_RATIO(speed) 2
1247 /* If we are optimizing for space (-Os), cut down the default move ratio. */
1248 #define MOVE_RATIO(speed) ((speed) ? 15 : 3)
1252 /* If a clear memory operation would take CLEAR_RATIO or more simple
1253 move-instruction sequences, we will do a setmem or libcall instead. */
1256 #if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
1257 #define CLEAR_RATIO(speed) 2
1259 /* If we are optimizing for space, cut down the default clear ratio. */
1260 #define CLEAR_RATIO(speed) ((speed) ? 15 :3)
1264 /* If a memory set (to value other than zero) operation would take
1265 SET_RATIO or more simple move-instruction sequences, we will do a movmem
1266 or libcall instead. */
1268 #define SET_RATIO(speed) MOVE_RATIO(speed)
1271 /* Supply a default definition for FUNCTION_ARG_PADDING:
1272 usually pad upward, but pad short args downward on
1273 big-endian machines. */
1275 #define DEFAULT_FUNCTION_ARG_PADDING(MODE, TYPE) \
1276 (! BYTES_BIG_ENDIAN \
1278 : (((MODE) == BLKmode \
1279 ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST \
1280 && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \
1281 : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY) \
1282 ? downward : upward))
1284 #ifndef FUNCTION_ARG_PADDING
1285 #define FUNCTION_ARG_PADDING(MODE, TYPE) \
1286 DEFAULT_FUNCTION_ARG_PADDING ((MODE), (TYPE))
1289 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
1290 Normally move_insn, so Pmode stack pointer. */
1292 #ifndef STACK_SAVEAREA_MODE
1293 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
1296 /* Supply a default definition of STACK_SIZE_MODE for
1297 allocate_dynamic_stack_space. Normally PLUS/MINUS, so word_mode. */
1299 #ifndef STACK_SIZE_MODE
1300 #define STACK_SIZE_MODE word_mode
1303 /* Provide default values for the macros controlling stack checking. */
1305 /* The default is neither full builtin stack checking... */
1306 #ifndef STACK_CHECK_BUILTIN
1307 #define STACK_CHECK_BUILTIN 0
1310 /* ...nor static builtin stack checking. */
1311 #ifndef STACK_CHECK_STATIC_BUILTIN
1312 #define STACK_CHECK_STATIC_BUILTIN 0
1315 /* The default interval is one page (4096 bytes). */
1316 #ifndef STACK_CHECK_PROBE_INTERVAL_EXP
1317 #define STACK_CHECK_PROBE_INTERVAL_EXP 12
1320 /* The default is not to move the stack pointer. */
1321 #ifndef STACK_CHECK_MOVING_SP
1322 #define STACK_CHECK_MOVING_SP 0
1325 /* This is a kludge to try to capture the discrepancy between the old
1326 mechanism (generic stack checking) and the new mechanism (static
1327 builtin stack checking). STACK_CHECK_PROTECT needs to be bumped
1328 for the latter because part of the protection area is effectively
1329 included in STACK_CHECK_MAX_FRAME_SIZE for the former. */
1330 #ifdef STACK_CHECK_PROTECT
1331 #define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
1333 #define STACK_OLD_CHECK_PROTECT \
1334 (targetm_common.except_unwind_info (&global_options) == UI_SJLJ \
1335 ? 75 * UNITS_PER_WORD \
1339 /* Minimum amount of stack required to recover from an anticipated stack
1340 overflow detection. The default value conveys an estimate of the amount
1341 of stack required to propagate an exception. */
1342 #ifndef STACK_CHECK_PROTECT
1343 #define STACK_CHECK_PROTECT \
1344 (targetm_common.except_unwind_info (&global_options) == UI_SJLJ \
1345 ? 75 * UNITS_PER_WORD \
1349 /* Make the maximum frame size be the largest we can and still only need
1350 one probe per function. */
1351 #ifndef STACK_CHECK_MAX_FRAME_SIZE
1352 #define STACK_CHECK_MAX_FRAME_SIZE \
1353 ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD)
1356 /* This is arbitrary, but should be large enough everywhere. */
1357 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
1358 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
1361 /* Provide a reasonable default for the maximum size of an object to
1362 allocate in the fixed frame. We may need to be able to make this
1363 controllable by the user at some point. */
1364 #ifndef STACK_CHECK_MAX_VAR_SIZE
1365 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
1368 /* By default, the C++ compiler will use function addresses in the
1369 vtable entries. Setting this nonzero tells the compiler to use
1370 function descriptors instead. The value of this macro says how
1371 many words wide the descriptor is (normally 2). It is assumed
1372 that the address of a function descriptor may be treated as a
1373 pointer to a function. */
1374 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
1375 #define TARGET_VTABLE_USES_DESCRIPTORS 0
1378 #ifndef SWITCHABLE_TARGET
1379 #define SWITCHABLE_TARGET 0
1382 #endif /* GCC_INSN_FLAGS_H */
1384 #endif /* ! GCC_DEFAULTS_H */