1 /* Definitions of various defaults for tm.h macros.
2 Copyright (C) 1992-2013 Free Software Foundation, Inc.
3 Contributed by Ron Guilmette (rfg@monkeys.com)
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 Under Section 7 of GPL version 3, you are granted additional
18 permissions described in the GCC Runtime Library Exception, version
19 3.1, as published by the Free Software Foundation.
21 You should have received a copy of the GNU General Public License and
22 a copy of the GCC Runtime Library Exception along with this program;
23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 <http://www.gnu.org/licenses/>. */
26 #ifndef GCC_DEFAULTS_H
27 #define GCC_DEFAULTS_H
29 /* How to start an assembler comment. */
30 #ifndef ASM_COMMENT_START
31 #define ASM_COMMENT_START ";#"
34 /* Store in OUTPUT a string (made with alloca) containing an
35 assembler-name for a local static variable or function named NAME.
36 LABELNO is an integer which is different for each call. */
39 # ifndef NO_DOT_IN_LABEL
40 # define ASM_PN_FORMAT "%s.%lu"
42 # ifndef NO_DOLLAR_IN_LABEL
43 # define ASM_PN_FORMAT "%s$%lu"
45 # define ASM_PN_FORMAT "__%s_%lu"
48 #endif /* ! ASM_PN_FORMAT */
50 #ifndef ASM_FORMAT_PRIVATE_NAME
51 # define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
52 do { const char *const name_ = (NAME); \
53 char *const output_ = (OUTPUT) = \
54 (char *) alloca (strlen (name_) + 32); \
55 sprintf (output_, ASM_PN_FORMAT, name_, (unsigned long)(LABELNO)); \
59 /* Choose a reasonable default for ASM_OUTPUT_ASCII. */
61 #ifndef ASM_OUTPUT_ASCII
62 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
64 FILE *_hide_asm_out_file = (MYFILE); \
65 const unsigned char *_hide_p = (const unsigned char *) (MYSTRING); \
66 int _hide_thissize = (MYLENGTH); \
68 FILE *asm_out_file = _hide_asm_out_file; \
69 const unsigned char *p = _hide_p; \
70 int thissize = _hide_thissize; \
72 fprintf (asm_out_file, "\t.ascii \""); \
74 for (i = 0; i < thissize; i++) \
77 if (c == '\"' || c == '\\') \
78 putc ('\\', asm_out_file); \
80 putc (c, asm_out_file); \
83 fprintf (asm_out_file, "\\%o", c); \
84 /* After an octal-escape, if a digit follows, \
85 terminate one string constant and start another. \
86 The VAX assembler fails to stop reading the escape \
87 after three digits, so this is the only way we \
88 can get it to parse the data properly. */ \
89 if (i < thissize - 1 && ISDIGIT (p[i + 1])) \
90 fprintf (asm_out_file, "\"\n\t.ascii \""); \
93 fprintf (asm_out_file, "\"\n"); \
99 /* This is how we tell the assembler to equate two values. */
101 #ifndef ASM_OUTPUT_DEF
102 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
103 do { fprintf ((FILE), "%s", SET_ASM_OP); \
104 assemble_name (FILE, LABEL1); \
105 fprintf (FILE, ","); \
106 assemble_name (FILE, LABEL2); \
107 fprintf (FILE, "\n"); \
112 #ifndef IFUNC_ASM_TYPE
113 #define IFUNC_ASM_TYPE "gnu_indirect_function"
116 #ifndef TLS_COMMON_ASM_OP
117 #define TLS_COMMON_ASM_OP ".tls_common"
120 #if defined (HAVE_AS_TLS) && !defined (ASM_OUTPUT_TLS_COMMON)
121 #define ASM_OUTPUT_TLS_COMMON(FILE, DECL, NAME, SIZE) \
124 fprintf ((FILE), "\t%s\t", TLS_COMMON_ASM_OP); \
125 assemble_name ((FILE), (NAME)); \
126 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", \
127 (SIZE), DECL_ALIGN (DECL) / BITS_PER_UNIT); \
132 /* Decide whether to defer emitting the assembler output for an equate
133 of two values. The default is to not defer output. */
134 #ifndef TARGET_DEFERRED_OUTPUT_DEFS
135 #define TARGET_DEFERRED_OUTPUT_DEFS(DECL,TARGET) false
138 /* This is how to output the definition of a user-level label named
139 NAME, such as the label on variable NAME. */
141 #ifndef ASM_OUTPUT_LABEL
142 #define ASM_OUTPUT_LABEL(FILE,NAME) \
144 assemble_name ((FILE), (NAME)); \
145 fputs (":\n", (FILE)); \
149 /* This is how to output the definition of a user-level label named
150 NAME, such as the label on a function. */
152 #ifndef ASM_OUTPUT_FUNCTION_LABEL
153 #define ASM_OUTPUT_FUNCTION_LABEL(FILE, NAME, DECL) \
154 ASM_OUTPUT_LABEL ((FILE), (NAME))
157 /* Output the definition of a compiler-generated label named NAME. */
158 #ifndef ASM_OUTPUT_INTERNAL_LABEL
159 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,NAME) \
161 assemble_name_raw ((FILE), (NAME)); \
162 fputs (":\n", (FILE)); \
166 /* This is how to output a reference to a user-level label named NAME. */
168 #ifndef ASM_OUTPUT_LABELREF
169 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
171 fputs (user_label_prefix, (FILE)); \
172 fputs ((NAME), (FILE)); \
176 /* Allow target to print debug info labels specially. This is useful for
177 VLIW targets, since debug info labels should go into the middle of
178 instruction bundles instead of breaking them. */
180 #ifndef ASM_OUTPUT_DEBUG_LABEL
181 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
182 (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM)
185 /* This is how we tell the assembler that a symbol is weak. */
186 #ifndef ASM_OUTPUT_WEAK_ALIAS
187 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
188 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE) \
191 ASM_WEAKEN_LABEL (STREAM, NAME); \
193 ASM_OUTPUT_DEF (STREAM, NAME, VALUE); \
199 /* This is how we tell the assembler that a symbol is a weak alias to
200 another symbol that doesn't require the other symbol to be defined.
201 Uses of the former will turn into weak uses of the latter, i.e.,
202 uses that, in case the latter is undefined, will not cause errors,
203 and will add it to the symbol table as weak undefined. However, if
204 the latter is referenced directly, a strong reference prevails. */
205 #ifndef ASM_OUTPUT_WEAKREF
206 #if defined HAVE_GAS_WEAKREF
207 #define ASM_OUTPUT_WEAKREF(FILE, DECL, NAME, VALUE) \
210 fprintf ((FILE), "\t.weakref\t"); \
211 assemble_name ((FILE), (NAME)); \
212 fprintf ((FILE), ","); \
213 assemble_name ((FILE), (VALUE)); \
214 fprintf ((FILE), "\n"); \
220 /* How to emit a .type directive. */
221 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE
222 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT
223 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE) \
226 fputs (TYPE_ASM_OP, STREAM); \
227 assemble_name (STREAM, NAME); \
228 fputs (", ", STREAM); \
229 fprintf (STREAM, TYPE_OPERAND_FMT, TYPE); \
230 putc ('\n', STREAM); \
236 /* How to emit a .size directive. */
237 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE
239 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE) \
242 HOST_WIDE_INT size_ = (SIZE); \
243 fputs (SIZE_ASM_OP, STREAM); \
244 assemble_name (STREAM, NAME); \
245 fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \
249 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME) \
252 fputs (SIZE_ASM_OP, STREAM); \
253 assemble_name (STREAM, NAME); \
254 fputs (", .-", STREAM); \
255 assemble_name (STREAM, NAME); \
256 putc ('\n', STREAM); \
263 /* This determines whether or not we support weak symbols. SUPPORTS_WEAK
264 must be a preprocessor constant. */
265 #ifndef SUPPORTS_WEAK
266 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
267 #define SUPPORTS_WEAK 1
269 #define SUPPORTS_WEAK 0
273 /* This determines whether or not we support weak symbols during target
274 code generation. TARGET_SUPPORTS_WEAK can be any valid C expression. */
275 #ifndef TARGET_SUPPORTS_WEAK
276 #define TARGET_SUPPORTS_WEAK (SUPPORTS_WEAK)
279 /* This determines whether or not we support the discriminator
280 attribute in the .loc directive. */
281 #ifndef SUPPORTS_DISCRIMINATOR
282 #ifdef HAVE_GAS_DISCRIMINATOR
283 #define SUPPORTS_DISCRIMINATOR 1
285 #define SUPPORTS_DISCRIMINATOR 0
289 /* This determines whether or not we support link-once semantics. */
290 #ifndef SUPPORTS_ONE_ONLY
291 #ifdef MAKE_DECL_ONE_ONLY
292 #define SUPPORTS_ONE_ONLY 1
294 #define SUPPORTS_ONE_ONLY 0
298 /* This determines whether weak symbols must be left out of a static
299 archive's table of contents. Defining this macro to be nonzero has
300 the consequence that certain symbols will not be made weak that
301 otherwise would be. The C++ ABI requires this macro to be zero;
302 see the documentation. */
303 #ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
304 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
307 /* This determines whether or not we need linkonce unwind information. */
308 #ifndef TARGET_USES_WEAK_UNWIND_INFO
309 #define TARGET_USES_WEAK_UNWIND_INFO 0
312 /* By default, there is no prefix on user-defined symbols. */
313 #ifndef USER_LABEL_PREFIX
314 #define USER_LABEL_PREFIX ""
317 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
318 provide a weak attribute. Else define it to nothing.
320 This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
321 not available at that time.
323 Note, this is only for use by target files which we know are to be
325 #ifndef TARGET_ATTRIBUTE_WEAK
327 # define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
329 # define TARGET_ATTRIBUTE_WEAK
333 /* By default we can assume that all global symbols are in one namespace,
334 across all shared libraries. */
335 #ifndef MULTIPLE_SYMBOL_SPACES
336 # define MULTIPLE_SYMBOL_SPACES 0
339 /* If the target supports init_priority C++ attribute, give
340 SUPPORTS_INIT_PRIORITY a nonzero value. */
341 #ifndef SUPPORTS_INIT_PRIORITY
342 #define SUPPORTS_INIT_PRIORITY 1
343 #endif /* SUPPORTS_INIT_PRIORITY */
345 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
346 the rest of the DWARF 2 frame unwind support is also provided. */
347 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
348 #define DWARF2_UNWIND_INFO 1
351 /* If we have named sections, and we're using crtstuff to run ctors,
352 use them for registering eh frame information. */
353 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
354 && !defined (EH_FRAME_IN_DATA_SECTION)
355 #ifndef EH_FRAME_SECTION_NAME
356 #define EH_FRAME_SECTION_NAME ".eh_frame"
360 /* On many systems, different EH table encodings are used under
361 difference circumstances. Some will require runtime relocations;
362 some will not. For those that do not require runtime relocations,
363 we would like to make the table read-only. However, since the
364 read-only tables may need to be combined with read-write tables
365 that do require runtime relocation, it is not safe to make the
366 tables read-only unless the linker will merge read-only and
367 read-write sections into a single read-write section. If your
368 linker does not have this ability, but your system is such that no
369 encoding used with non-PIC code will ever require a runtime
370 relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in
371 your target configuration file. */
372 #ifndef EH_TABLES_CAN_BE_READ_ONLY
373 #ifdef HAVE_LD_RO_RW_SECTION_MIXING
374 #define EH_TABLES_CAN_BE_READ_ONLY 1
376 #define EH_TABLES_CAN_BE_READ_ONLY 0
380 /* If we have named section and we support weak symbols, then use the
381 .jcr section for recording java classes which need to be registered
382 at program start-up time. */
383 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
384 #ifndef JCR_SECTION_NAME
385 #define JCR_SECTION_NAME ".jcr"
389 /* This decision to use a .jcr section can be overridden by defining
390 USE_JCR_SECTION to 0 in target file. This is necessary if target
391 can define JCR_SECTION_NAME but does not have crtstuff or
392 linker support for .jcr section. */
393 #ifndef TARGET_USE_JCR_SECTION
394 #ifdef JCR_SECTION_NAME
395 #define TARGET_USE_JCR_SECTION 1
397 #define TARGET_USE_JCR_SECTION 0
401 /* Number of hardware registers that go into the DWARF-2 unwind info.
402 If not defined, equals FIRST_PSEUDO_REGISTER */
404 #ifndef DWARF_FRAME_REGISTERS
405 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
408 /* Offsets recorded in opcodes are a multiple of this alignment factor. */
409 #ifndef DWARF_CIE_DATA_ALIGNMENT
410 #ifdef STACK_GROWS_DOWNWARD
411 #define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD))
413 #define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD)
417 /* The DWARF 2 CFA column which tracks the return address. Normally this
418 is the column for PC, or the first column after all of the hard
420 #ifndef DWARF_FRAME_RETURN_COLUMN
422 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM)
424 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGISTERS
428 /* How to renumber registers for dbx and gdb. If not defined, assume
429 no renumbering is necessary. */
431 #ifndef DBX_REGISTER_NUMBER
432 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
435 /* The mapping from gcc register number to DWARF 2 CFA column number.
436 By default, we just provide columns for all registers. */
437 #ifndef DWARF_FRAME_REGNUM
438 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
441 /* Map register numbers held in the call frame info that gcc has
442 collected using DWARF_FRAME_REGNUM to those that should be output in
443 .debug_frame and .eh_frame. */
444 #ifndef DWARF2_FRAME_REG_OUT
445 #define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) (REGNO)
448 /* The size of addresses as they appear in the Dwarf 2 data.
449 Some architectures use word addresses to refer to code locations,
450 but Dwarf 2 info always uses byte addresses. On such machines,
451 Dwarf 2 addresses need to be larger than the architecture's
453 #ifndef DWARF2_ADDR_SIZE
454 #define DWARF2_ADDR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
457 /* The size in bytes of a DWARF field indicating an offset or length
458 relative to a debug info section, specified to be 4 bytes in the
459 DWARF-2 specification. The SGI/MIPS ABI defines it to be the same
461 #ifndef DWARF_OFFSET_SIZE
462 #define DWARF_OFFSET_SIZE 4
465 /* The size in bytes of a DWARF 4 type signature. */
466 #ifndef DWARF_TYPE_SIGNATURE_SIZE
467 #define DWARF_TYPE_SIGNATURE_SIZE 8
470 /* Default sizes for base C types. If the sizes are different for
471 your target, you should override these values by defining the
472 appropriate symbols in your tm.h file. */
474 #ifndef BITS_PER_UNIT
475 #define BITS_PER_UNIT 8
478 #ifndef BITS_PER_WORD
479 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
482 #ifndef CHAR_TYPE_SIZE
483 #define CHAR_TYPE_SIZE BITS_PER_UNIT
486 #ifndef BOOL_TYPE_SIZE
487 /* `bool' has size and alignment `1', on almost all platforms. */
488 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
491 #ifndef SHORT_TYPE_SIZE
492 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
495 #ifndef INT_TYPE_SIZE
496 #define INT_TYPE_SIZE BITS_PER_WORD
499 #ifndef LONG_TYPE_SIZE
500 #define LONG_TYPE_SIZE BITS_PER_WORD
503 #ifndef LONG_LONG_TYPE_SIZE
504 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
507 #ifndef WCHAR_TYPE_SIZE
508 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
511 #ifndef FLOAT_TYPE_SIZE
512 #define FLOAT_TYPE_SIZE BITS_PER_WORD
515 #ifndef DOUBLE_TYPE_SIZE
516 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
519 #ifndef LONG_DOUBLE_TYPE_SIZE
520 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
523 #ifndef DECIMAL32_TYPE_SIZE
524 #define DECIMAL32_TYPE_SIZE 32
527 #ifndef DECIMAL64_TYPE_SIZE
528 #define DECIMAL64_TYPE_SIZE 64
531 #ifndef DECIMAL128_TYPE_SIZE
532 #define DECIMAL128_TYPE_SIZE 128
535 #ifndef SHORT_FRACT_TYPE_SIZE
536 #define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT
539 #ifndef FRACT_TYPE_SIZE
540 #define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2)
543 #ifndef LONG_FRACT_TYPE_SIZE
544 #define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4)
547 #ifndef LONG_LONG_FRACT_TYPE_SIZE
548 #define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8)
551 #ifndef SHORT_ACCUM_TYPE_SIZE
552 #define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2)
555 #ifndef ACCUM_TYPE_SIZE
556 #define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2)
559 #ifndef LONG_ACCUM_TYPE_SIZE
560 #define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2)
563 #ifndef LONG_LONG_ACCUM_TYPE_SIZE
564 #define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2)
567 /* We let tm.h override the types used here, to handle trivial differences
568 such as the choice of unsigned int or long unsigned int for size_t.
569 When machines start needing nontrivial differences in the size type,
570 it would be best to do something here to figure out automatically
571 from other information what type to use. */
574 #define SIZE_TYPE "long unsigned int"
578 #define SIZETYPE SIZE_TYPE
582 #define PID_TYPE "int"
585 /* If GCC knows the exact uint_least16_t and uint_least32_t types from
586 <stdint.h>, use them for char16_t and char32_t. Otherwise, use
587 these guesses; getting the wrong type of a given width will not
588 affect C++ name mangling because in C++ these are distinct types
591 #ifdef UINT_LEAST16_TYPE
592 #define CHAR16_TYPE UINT_LEAST16_TYPE
594 #define CHAR16_TYPE "short unsigned int"
597 #ifdef UINT_LEAST32_TYPE
598 #define CHAR32_TYPE UINT_LEAST32_TYPE
600 #define CHAR32_TYPE "unsigned int"
604 #define WCHAR_TYPE "int"
607 /* WCHAR_TYPE gets overridden by -fshort-wchar. */
608 #define MODIFIED_WCHAR_TYPE \
609 (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE)
612 #define PTRDIFF_TYPE "long int"
616 #define WINT_TYPE "unsigned int"
620 #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
622 : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
628 #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
630 : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
631 ? "long unsigned int" \
632 : "long long unsigned int"))
636 /* There are no default definitions of these <stdint.h> types. */
638 #ifndef SIG_ATOMIC_TYPE
639 #define SIG_ATOMIC_TYPE ((const char *) NULL)
643 #define INT8_TYPE ((const char *) NULL)
647 #define INT16_TYPE ((const char *) NULL)
651 #define INT32_TYPE ((const char *) NULL)
655 #define INT64_TYPE ((const char *) NULL)
659 #define UINT8_TYPE ((const char *) NULL)
663 #define UINT16_TYPE ((const char *) NULL)
667 #define UINT32_TYPE ((const char *) NULL)
671 #define UINT64_TYPE ((const char *) NULL)
674 #ifndef INT_LEAST8_TYPE
675 #define INT_LEAST8_TYPE ((const char *) NULL)
678 #ifndef INT_LEAST16_TYPE
679 #define INT_LEAST16_TYPE ((const char *) NULL)
682 #ifndef INT_LEAST32_TYPE
683 #define INT_LEAST32_TYPE ((const char *) NULL)
686 #ifndef INT_LEAST64_TYPE
687 #define INT_LEAST64_TYPE ((const char *) NULL)
690 #ifndef UINT_LEAST8_TYPE
691 #define UINT_LEAST8_TYPE ((const char *) NULL)
694 #ifndef UINT_LEAST16_TYPE
695 #define UINT_LEAST16_TYPE ((const char *) NULL)
698 #ifndef UINT_LEAST32_TYPE
699 #define UINT_LEAST32_TYPE ((const char *) NULL)
702 #ifndef UINT_LEAST64_TYPE
703 #define UINT_LEAST64_TYPE ((const char *) NULL)
706 #ifndef INT_FAST8_TYPE
707 #define INT_FAST8_TYPE ((const char *) NULL)
710 #ifndef INT_FAST16_TYPE
711 #define INT_FAST16_TYPE ((const char *) NULL)
714 #ifndef INT_FAST32_TYPE
715 #define INT_FAST32_TYPE ((const char *) NULL)
718 #ifndef INT_FAST64_TYPE
719 #define INT_FAST64_TYPE ((const char *) NULL)
722 #ifndef UINT_FAST8_TYPE
723 #define UINT_FAST8_TYPE ((const char *) NULL)
726 #ifndef UINT_FAST16_TYPE
727 #define UINT_FAST16_TYPE ((const char *) NULL)
730 #ifndef UINT_FAST32_TYPE
731 #define UINT_FAST32_TYPE ((const char *) NULL)
734 #ifndef UINT_FAST64_TYPE
735 #define UINT_FAST64_TYPE ((const char *) NULL)
739 #define INTPTR_TYPE ((const char *) NULL)
743 #define UINTPTR_TYPE ((const char *) NULL)
746 /* Width in bits of a pointer. Mind the value of the macro `Pmode'. */
748 #define POINTER_SIZE BITS_PER_WORD
751 #ifndef PIC_OFFSET_TABLE_REGNUM
752 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
755 #ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
756 #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 0
759 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
760 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
763 #ifndef TARGET_DECLSPEC
764 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
765 /* If the target supports the "dllimport" attribute, users are
766 probably used to the "__declspec" syntax. */
767 #define TARGET_DECLSPEC 1
769 #define TARGET_DECLSPEC 0
773 /* By default, the preprocessor should be invoked the same way in C++
775 #ifndef CPLUSPLUS_CPP_SPEC
777 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
781 #ifndef ACCUMULATE_OUTGOING_ARGS
782 #define ACCUMULATE_OUTGOING_ARGS 0
785 /* By default, use the GNU runtime for Objective C. */
786 #ifndef NEXT_OBJC_RUNTIME
787 #define NEXT_OBJC_RUNTIME 0
790 /* Supply a default definition for PUSH_ARGS. */
793 #define PUSH_ARGS !ACCUMULATE_OUTGOING_ARGS
799 /* Decide whether a function's arguments should be processed
800 from first to last or from last to first.
802 They should if the stack and args grow in opposite directions, but
803 only if we have push insns. */
807 #ifndef PUSH_ARGS_REVERSED
808 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
809 #define PUSH_ARGS_REVERSED PUSH_ARGS
815 #ifndef PUSH_ARGS_REVERSED
816 #define PUSH_ARGS_REVERSED 0
819 /* Default value for the alignment (in bits) a C conformant malloc has to
820 provide. This default is intended to be safe and always correct. */
821 #ifndef MALLOC_ABI_ALIGNMENT
822 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
825 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
826 STACK_BOUNDARY is required. */
827 #ifndef PREFERRED_STACK_BOUNDARY
828 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
831 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not
833 #ifndef INCOMING_STACK_BOUNDARY
834 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY
837 #ifndef TARGET_DEFAULT_PACK_STRUCT
838 #define TARGET_DEFAULT_PACK_STRUCT 0
841 /* By default, the vtable entries are void pointers, the so the alignment
842 is the same as pointer alignment. The value of this macro specifies
843 the alignment of the vtable entry in bits. It should be defined only
844 when special alignment is necessary. */
845 #ifndef TARGET_VTABLE_ENTRY_ALIGN
846 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
849 /* There are a few non-descriptor entries in the vtable at offsets below
850 zero. If these entries must be padded (say, to preserve the alignment
851 specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
852 words in each data entry. */
853 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
854 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
857 /* Decide whether it is safe to use a local alias for a virtual function
858 when constructing thunks. */
859 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
860 #ifdef ASM_OUTPUT_DEF
861 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
863 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
867 /* Select a format to encode pointers in exception handling data. We
868 prefer those that result in fewer dynamic relocations. Assume no
869 special support here and encode direct references. */
870 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
871 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) DW_EH_PE_absptr
874 /* By default, the C++ compiler will use the lowest bit of the pointer
875 to function to indicate a pointer-to-member-function points to a
876 virtual member function. However, if FUNCTION_BOUNDARY indicates
877 function addresses aren't always even, the lowest bit of the delta
878 field will be used. */
879 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
880 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
881 (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
882 ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
885 #ifndef DEFAULT_GDB_EXTENSIONS
886 #define DEFAULT_GDB_EXTENSIONS 1
889 /* If more than one debugging type is supported, you must define
890 PREFERRED_DEBUGGING_TYPE to choose the default. */
892 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
893 + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
894 + defined (VMS_DEBUGGING_INFO))
895 #ifndef PREFERRED_DEBUGGING_TYPE
896 #error You must define PREFERRED_DEBUGGING_TYPE
897 #endif /* no PREFERRED_DEBUGGING_TYPE */
899 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
900 here so other code needn't care. */
901 #elif defined DBX_DEBUGGING_INFO
902 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
904 #elif defined SDB_DEBUGGING_INFO
905 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
907 #elif defined DWARF2_DEBUGGING_INFO
908 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
910 #elif defined VMS_DEBUGGING_INFO
911 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
913 #elif defined XCOFF_DEBUGGING_INFO
914 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
917 /* No debugging format is supported by this target. */
918 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
921 #ifndef LARGEST_EXPONENT_IS_NORMAL
922 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
925 #ifndef ROUND_TOWARDS_ZERO
926 #define ROUND_TOWARDS_ZERO 0
929 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
930 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
933 /* True if the targets integer-comparison functions return { 0, 1, 2
934 } to indicate { <, ==, > }. False if { -1, 0, 1 } is used
935 instead. The libgcc routines are biased. */
936 #ifndef TARGET_LIB_INT_CMP_BIASED
937 #define TARGET_LIB_INT_CMP_BIASED (true)
940 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
941 then the word-endianness is the same as for integers. */
942 #ifndef FLOAT_WORDS_BIG_ENDIAN
943 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
946 #ifndef REG_WORDS_BIG_ENDIAN
947 #define REG_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
950 #ifdef TARGET_FLT_EVAL_METHOD
951 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 1
953 #define TARGET_FLT_EVAL_METHOD 0
954 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 0
957 #ifndef TARGET_DEC_EVAL_METHOD
958 #define TARGET_DEC_EVAL_METHOD 2
961 #ifndef HAS_LONG_COND_BRANCH
962 #define HAS_LONG_COND_BRANCH 0
965 #ifndef HAS_LONG_UNCOND_BRANCH
966 #define HAS_LONG_UNCOND_BRANCH 0
969 /* Determine whether __cxa_atexit, rather than atexit, is used to
970 register C++ destructors for local statics and global objects. */
971 #ifndef DEFAULT_USE_CXA_ATEXIT
972 #define DEFAULT_USE_CXA_ATEXIT 0
975 /* If none of these macros are defined, the port must use the new
976 technique of defining constraints in the machine description.
977 tm_p.h will define those macros that machine-independent code
979 #if !defined CONSTRAINT_LEN \
980 && !defined REG_CLASS_FROM_LETTER \
981 && !defined REG_CLASS_FROM_CONSTRAINT \
982 && !defined CONST_OK_FOR_LETTER_P \
983 && !defined CONST_OK_FOR_CONSTRAINT_P \
984 && !defined CONST_DOUBLE_OK_FOR_LETTER_P \
985 && !defined CONST_DOUBLE_OK_FOR_CONSTRAINT_P \
986 && !defined EXTRA_CONSTRAINT \
987 && !defined EXTRA_CONSTRAINT_STR \
988 && !defined EXTRA_MEMORY_CONSTRAINT \
989 && !defined EXTRA_ADDRESS_CONSTRAINT
991 #define USE_MD_CONSTRAINTS
993 #if GCC_VERSION >= 3000 && defined IN_GCC
994 /* These old constraint macros shouldn't appear anywhere in a
995 configuration using MD constraint definitions. */
996 #pragma GCC poison REG_CLASS_FROM_LETTER CONST_OK_FOR_LETTER_P \
997 CONST_DOUBLE_OK_FOR_LETTER_P EXTRA_CONSTRAINT
1000 #else /* old constraint mechanism in use */
1002 /* Determine whether extra constraint letter should be handled
1003 via address reload (like 'o'). */
1004 #ifndef EXTRA_MEMORY_CONSTRAINT
1005 #define EXTRA_MEMORY_CONSTRAINT(C,STR) 0
1008 /* Determine whether extra constraint letter should be handled
1009 as an address (like 'p'). */
1010 #ifndef EXTRA_ADDRESS_CONSTRAINT
1011 #define EXTRA_ADDRESS_CONSTRAINT(C,STR) 0
1014 /* When a port defines CONSTRAINT_LEN, it should use DEFAULT_CONSTRAINT_LEN
1015 for all the characters that it does not want to change, so things like the
1016 'length' of a digit in a matching constraint is an implementation detail,
1017 and not part of the interface. */
1018 #define DEFAULT_CONSTRAINT_LEN(C,STR) 1
1020 #ifndef CONSTRAINT_LEN
1021 #define CONSTRAINT_LEN(C,STR) DEFAULT_CONSTRAINT_LEN (C, STR)
1024 #if defined (CONST_OK_FOR_LETTER_P) && ! defined (CONST_OK_FOR_CONSTRAINT_P)
1025 #define CONST_OK_FOR_CONSTRAINT_P(VAL,C,STR) CONST_OK_FOR_LETTER_P (VAL, C)
1028 #if defined (CONST_DOUBLE_OK_FOR_LETTER_P) && ! defined (CONST_DOUBLE_OK_FOR_CONSTRAINT_P)
1029 #define CONST_DOUBLE_OK_FOR_CONSTRAINT_P(OP,C,STR) \
1030 CONST_DOUBLE_OK_FOR_LETTER_P (OP, C)
1033 #ifndef REG_CLASS_FROM_CONSTRAINT
1034 #define REG_CLASS_FROM_CONSTRAINT(C,STR) REG_CLASS_FROM_LETTER (C)
1037 #if defined (EXTRA_CONSTRAINT) && ! defined (EXTRA_CONSTRAINT_STR)
1038 #define EXTRA_CONSTRAINT_STR(OP, C,STR) EXTRA_CONSTRAINT (OP, C)
1041 #endif /* old constraint mechanism in use */
1043 /* Determin whether the target runtime library is Bionic */
1044 #ifndef TARGET_HAS_BIONIC
1045 #define TARGET_HAS_BIONIC 0
1048 /* Indicate that CLZ and CTZ are undefined at zero. */
1049 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
1050 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
1052 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
1053 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
1056 /* Provide a default value for STORE_FLAG_VALUE. */
1057 #ifndef STORE_FLAG_VALUE
1058 #define STORE_FLAG_VALUE 1
1061 /* This macro is used to determine what the largest unit size that
1062 move_by_pieces can use is. */
1064 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
1065 move efficiently, as opposed to MOVE_MAX which is the maximum
1066 number of bytes we can move with a single instruction. */
1068 #ifndef MOVE_MAX_PIECES
1069 #define MOVE_MAX_PIECES MOVE_MAX
1072 #ifndef MAX_MOVE_MAX
1073 #define MAX_MOVE_MAX MOVE_MAX
1076 #ifndef MIN_UNITS_PER_WORD
1077 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
1080 #ifndef MAX_BITS_PER_WORD
1081 #define MAX_BITS_PER_WORD BITS_PER_WORD
1084 #ifndef STACK_POINTER_OFFSET
1085 #define STACK_POINTER_OFFSET 0
1089 #define LOCAL_REGNO(REGNO) 0
1092 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1093 the stack pointer does not matter. The value is tested only in
1094 functions that have frame pointers. */
1095 #ifndef EXIT_IGNORE_STACK
1096 #define EXIT_IGNORE_STACK 0
1099 /* Assume that case vectors are not pc-relative. */
1100 #ifndef CASE_VECTOR_PC_RELATIVE
1101 #define CASE_VECTOR_PC_RELATIVE 0
1104 /* Assume that trampolines need function alignment. */
1105 #ifndef TRAMPOLINE_ALIGNMENT
1106 #define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY
1109 /* Register mappings for target machines without register windows. */
1110 #ifndef INCOMING_REGNO
1111 #define INCOMING_REGNO(N) (N)
1114 #ifndef OUTGOING_REGNO
1115 #define OUTGOING_REGNO(N) (N)
1118 #ifndef SHIFT_COUNT_TRUNCATED
1119 #define SHIFT_COUNT_TRUNCATED 0
1122 #ifndef LEGITIMATE_PIC_OPERAND_P
1123 #define LEGITIMATE_PIC_OPERAND_P(X) 1
1126 #ifndef TARGET_MEM_CONSTRAINT
1127 #define TARGET_MEM_CONSTRAINT 'm'
1130 #ifndef REVERSIBLE_CC_MODE
1131 #define REVERSIBLE_CC_MODE(MODE) 0
1134 /* Biggest alignment supported by the object file format of this machine. */
1135 #ifndef MAX_OFILE_ALIGNMENT
1136 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
1139 #ifndef FRAME_GROWS_DOWNWARD
1140 #define FRAME_GROWS_DOWNWARD 0
1143 /* On most machines, the CFA coincides with the first incoming parm. */
1144 #ifndef ARG_POINTER_CFA_OFFSET
1145 #define ARG_POINTER_CFA_OFFSET(FNDECL) \
1146 (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
1149 /* On most machines, we use the CFA as DW_AT_frame_base. */
1150 #ifndef CFA_FRAME_BASE_OFFSET
1151 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0
1154 /* The offset from the incoming value of %sp to the top of the stack frame
1155 for the current function. */
1156 #ifndef INCOMING_FRAME_SP_OFFSET
1157 #define INCOMING_FRAME_SP_OFFSET 0
1160 #ifndef HARD_REGNO_NREGS_HAS_PADDING
1161 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
1162 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
1165 #ifndef OUTGOING_REG_PARM_STACK_SPACE
1166 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
1169 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
1170 the backend. MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
1171 effort stack alignment supported by the backend. If the backend
1172 supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
1173 MAX_STACK_ALIGNMENT are the same. Otherwise, the incoming stack
1174 boundary will limit the maximum guaranteed stack alignment. */
1175 #ifdef MAX_STACK_ALIGNMENT
1176 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
1178 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY
1179 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
1182 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
1184 #ifndef LOCAL_ALIGNMENT
1185 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
1188 #ifndef STACK_SLOT_ALIGNMENT
1189 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
1190 ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
1193 #ifndef LOCAL_DECL_ALIGNMENT
1194 #define LOCAL_DECL_ALIGNMENT(DECL) \
1195 LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
1198 #ifndef MINIMUM_ALIGNMENT
1199 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN)
1202 /* Alignment value for attribute ((aligned)). */
1203 #ifndef ATTRIBUTE_ALIGNED_VALUE
1204 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
1207 #ifndef SLOW_UNALIGNED_ACCESS
1208 #define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) STRICT_ALIGNMENT
1211 /* For most ports anything that evaluates to a constant symbolic
1212 or integer value is acceptable as a constant address. */
1213 #ifndef CONSTANT_ADDRESS_P
1214 #define CONSTANT_ADDRESS_P(X) (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE)
1217 #ifndef MAX_FIXED_MODE_SIZE
1218 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
1221 /* Nonzero if structures and unions should be returned in memory.
1223 This should only be defined if compatibility with another compiler or
1224 with an ABI is needed, because it results in slower code. */
1226 #ifndef DEFAULT_PCC_STRUCT_RETURN
1227 #define DEFAULT_PCC_STRUCT_RETURN 1
1230 #ifdef GCC_INSN_FLAGS_H
1231 /* Dependent default target macro definitions
1233 This section of defaults.h defines target macros that depend on generated
1234 headers. This is a bit awkward: We want to put all default definitions
1235 for target macros in defaults.h, but some of the defaults depend on the
1236 HAVE_* flags defines of insn-flags.h. But insn-flags.h is not always
1237 included by files that do include defaults.h.
1239 Fortunately, the default macro definitions that depend on the HAVE_*
1240 macros are also the ones that will only be used inside GCC itself, i.e.
1241 not in the gen* programs or in target objects like libgcc.
1243 Obviously, it would be best to keep this section of defaults.h as small
1244 as possible, by converting the macros defined below to target hooks or
1248 /* The default branch cost is 1. */
1250 #define BRANCH_COST(speed_p, predictable_p) 1
1253 /* If a memory-to-memory move would take MOVE_RATIO or more simple
1254 move-instruction sequences, we will do a movmem or libcall instead. */
1257 #if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti)
1258 #define MOVE_RATIO(speed) 2
1260 /* If we are optimizing for space (-Os), cut down the default move ratio. */
1261 #define MOVE_RATIO(speed) ((speed) ? 15 : 3)
1265 /* If a clear memory operation would take CLEAR_RATIO or more simple
1266 move-instruction sequences, we will do a setmem or libcall instead. */
1269 #if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
1270 #define CLEAR_RATIO(speed) 2
1272 /* If we are optimizing for space, cut down the default clear ratio. */
1273 #define CLEAR_RATIO(speed) ((speed) ? 15 :3)
1277 /* If a memory set (to value other than zero) operation would take
1278 SET_RATIO or more simple move-instruction sequences, we will do a movmem
1279 or libcall instead. */
1281 #define SET_RATIO(speed) MOVE_RATIO (speed)
1284 /* Supply a default definition for FUNCTION_ARG_PADDING:
1285 usually pad upward, but pad short args downward on
1286 big-endian machines. */
1288 #define DEFAULT_FUNCTION_ARG_PADDING(MODE, TYPE) \
1289 (! BYTES_BIG_ENDIAN \
1291 : (((MODE) == BLKmode \
1292 ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST \
1293 && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \
1294 : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY) \
1295 ? downward : upward))
1297 #ifndef FUNCTION_ARG_PADDING
1298 #define FUNCTION_ARG_PADDING(MODE, TYPE) \
1299 DEFAULT_FUNCTION_ARG_PADDING ((MODE), (TYPE))
1302 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
1303 Normally move_insn, so Pmode stack pointer. */
1305 #ifndef STACK_SAVEAREA_MODE
1306 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
1309 /* Supply a default definition of STACK_SIZE_MODE for
1310 allocate_dynamic_stack_space. Normally PLUS/MINUS, so word_mode. */
1312 #ifndef STACK_SIZE_MODE
1313 #define STACK_SIZE_MODE word_mode
1316 /* Provide default values for the macros controlling stack checking. */
1318 /* The default is neither full builtin stack checking... */
1319 #ifndef STACK_CHECK_BUILTIN
1320 #define STACK_CHECK_BUILTIN 0
1323 /* ...nor static builtin stack checking. */
1324 #ifndef STACK_CHECK_STATIC_BUILTIN
1325 #define STACK_CHECK_STATIC_BUILTIN 0
1328 /* The default interval is one page (4096 bytes). */
1329 #ifndef STACK_CHECK_PROBE_INTERVAL_EXP
1330 #define STACK_CHECK_PROBE_INTERVAL_EXP 12
1333 /* The default is not to move the stack pointer. */
1334 #ifndef STACK_CHECK_MOVING_SP
1335 #define STACK_CHECK_MOVING_SP 0
1338 /* This is a kludge to try to capture the discrepancy between the old
1339 mechanism (generic stack checking) and the new mechanism (static
1340 builtin stack checking). STACK_CHECK_PROTECT needs to be bumped
1341 for the latter because part of the protection area is effectively
1342 included in STACK_CHECK_MAX_FRAME_SIZE for the former. */
1343 #ifdef STACK_CHECK_PROTECT
1344 #define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
1346 #define STACK_OLD_CHECK_PROTECT \
1347 (targetm_common.except_unwind_info (&global_options) == UI_SJLJ \
1348 ? 75 * UNITS_PER_WORD \
1352 /* Minimum amount of stack required to recover from an anticipated stack
1353 overflow detection. The default value conveys an estimate of the amount
1354 of stack required to propagate an exception. */
1355 #ifndef STACK_CHECK_PROTECT
1356 #define STACK_CHECK_PROTECT \
1357 (targetm_common.except_unwind_info (&global_options) == UI_SJLJ \
1358 ? 75 * UNITS_PER_WORD \
1362 /* Make the maximum frame size be the largest we can and still only need
1363 one probe per function. */
1364 #ifndef STACK_CHECK_MAX_FRAME_SIZE
1365 #define STACK_CHECK_MAX_FRAME_SIZE \
1366 ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD)
1369 /* This is arbitrary, but should be large enough everywhere. */
1370 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
1371 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
1374 /* Provide a reasonable default for the maximum size of an object to
1375 allocate in the fixed frame. We may need to be able to make this
1376 controllable by the user at some point. */
1377 #ifndef STACK_CHECK_MAX_VAR_SIZE
1378 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
1381 /* By default, the C++ compiler will use function addresses in the
1382 vtable entries. Setting this nonzero tells the compiler to use
1383 function descriptors instead. The value of this macro says how
1384 many words wide the descriptor is (normally 2). It is assumed
1385 that the address of a function descriptor may be treated as a
1386 pointer to a function. */
1387 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
1388 #define TARGET_VTABLE_USES_DESCRIPTORS 0
1391 #ifndef SWITCHABLE_TARGET
1392 #define SWITCHABLE_TARGET 0
1395 /* If the target supports integers that are wider than two
1396 HOST_WIDE_INTs on the host compiler, then the target should define
1397 TARGET_SUPPORTS_WIDE_INT and make the appropriate fixups.
1398 Otherwise the compiler really is not robust. */
1399 #ifndef TARGET_SUPPORTS_WIDE_INT
1400 #define TARGET_SUPPORTS_WIDE_INT 0
1403 #endif /* GCC_INSN_FLAGS_H */
1405 #endif /* ! GCC_DEFAULTS_H */