1 /* Definitions of various defaults for tm.h macros.
2 Copyright (C) 1992-2022 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 *_my_file = (MYFILE); \
65 const unsigned char *_hide_p = (const unsigned char *) (MYSTRING); \
66 int _hide_thissize = (MYLENGTH); \
68 const unsigned char *p = _hide_p; \
69 int thissize = _hide_thissize; \
71 fprintf (_my_file, "\t.ascii \""); \
73 for (i = 0; i < thissize; i++) \
76 if (c == '\"' || c == '\\') \
77 putc ('\\', _my_file); \
82 fprintf (_my_file, "\\%o", c); \
83 /* After an octal-escape, if a digit follows, \
84 terminate one string constant and start another. \
85 The VAX assembler fails to stop reading the escape \
86 after three digits, so this is the only way we \
87 can get it to parse the data properly. */ \
88 if (i < thissize - 1 && ISDIGIT (p[i + 1])) \
89 fprintf (_my_file, "\"\n\t.ascii \""); \
92 fprintf (_my_file, "\"\n"); \
98 /* This is how we tell the assembler to equate two values. */
100 #ifndef ASM_OUTPUT_DEF
101 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
102 do { fprintf ((FILE), "%s", SET_ASM_OP); \
103 assemble_name (FILE, LABEL1); \
104 fprintf (FILE, ","); \
105 assemble_name (FILE, LABEL2); \
106 fprintf (FILE, "\n"); \
111 #ifndef IFUNC_ASM_TYPE
112 #define IFUNC_ASM_TYPE "gnu_indirect_function"
115 #ifndef TLS_COMMON_ASM_OP
116 #define TLS_COMMON_ASM_OP ".tls_common"
119 #if defined (HAVE_AS_TLS) && !defined (ASM_OUTPUT_TLS_COMMON)
120 #define ASM_OUTPUT_TLS_COMMON(FILE, DECL, NAME, SIZE) \
123 fprintf ((FILE), "\t%s\t", TLS_COMMON_ASM_OP); \
124 assemble_name ((FILE), (NAME)); \
125 fprintf ((FILE), "," HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", \
126 (SIZE), DECL_ALIGN (DECL) / BITS_PER_UNIT); \
131 /* Decide whether to defer emitting the assembler output for an equate
132 of two values. The default is to not defer output. */
133 #ifndef TARGET_DEFERRED_OUTPUT_DEFS
134 #define TARGET_DEFERRED_OUTPUT_DEFS(DECL,TARGET) false
137 /* This is how to output the definition of a user-level label named
138 NAME, such as the label on variable NAME. */
140 #ifndef ASM_OUTPUT_LABEL
141 #define ASM_OUTPUT_LABEL(FILE,NAME) \
143 assemble_name ((FILE), (NAME)); \
144 fputs (":\n", (FILE)); \
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) \
170 fputs (user_label_prefix, (FILE)); \
171 fputs ((NAME), (FILE)); \
175 /* Allow target to print debug info labels specially. This is useful for
176 VLIW targets, since debug info labels should go into the middle of
177 instruction bundles instead of breaking them. */
179 #ifndef ASM_OUTPUT_DEBUG_LABEL
180 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
181 (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM)
184 /* This is how we tell the assembler that a symbol is weak. */
185 #ifndef ASM_OUTPUT_WEAK_ALIAS
186 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
187 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE) \
190 ASM_WEAKEN_LABEL (STREAM, NAME); \
192 ASM_OUTPUT_DEF (STREAM, NAME, VALUE); \
198 /* This is how we tell the assembler that a symbol is a weak alias to
199 another symbol that doesn't require the other symbol to be defined.
200 Uses of the former will turn into weak uses of the latter, i.e.,
201 uses that, in case the latter is undefined, will not cause errors,
202 and will add it to the symbol table as weak undefined. However, if
203 the latter is referenced directly, a strong reference prevails. */
204 #ifndef ASM_OUTPUT_WEAKREF
205 #if defined HAVE_GAS_WEAKREF
206 #define ASM_OUTPUT_WEAKREF(FILE, DECL, NAME, VALUE) \
209 fprintf ((FILE), "\t.weakref\t"); \
210 assemble_name ((FILE), (NAME)); \
211 fprintf ((FILE), ","); \
212 assemble_name ((FILE), (VALUE)); \
213 fprintf ((FILE), "\n"); \
219 /* How to emit a .type directive. */
220 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE
221 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT
222 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE) \
225 fputs (TYPE_ASM_OP, STREAM); \
226 assemble_name (STREAM, NAME); \
227 fputs (", ", STREAM); \
228 fprintf (STREAM, TYPE_OPERAND_FMT, TYPE); \
229 putc ('\n', STREAM); \
235 /* How to emit a .size directive. */
236 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE
238 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE) \
241 HOST_WIDE_INT size_ = (SIZE); \
242 fputs (SIZE_ASM_OP, STREAM); \
243 assemble_name (STREAM, NAME); \
244 fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \
248 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME) \
251 fputs (SIZE_ASM_OP, STREAM); \
252 assemble_name (STREAM, NAME); \
253 fputs (", .-", STREAM); \
254 assemble_name (STREAM, NAME); \
255 putc ('\n', STREAM); \
262 /* This determines whether or not we support weak symbols. SUPPORTS_WEAK
263 must be a preprocessor constant. */
264 #ifndef SUPPORTS_WEAK
265 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
266 #define SUPPORTS_WEAK 1
268 #define SUPPORTS_WEAK 0
272 /* This determines whether or not we support weak symbols during target
273 code generation. TARGET_SUPPORTS_WEAK can be any valid C expression. */
274 #ifndef TARGET_SUPPORTS_WEAK
275 #define TARGET_SUPPORTS_WEAK (SUPPORTS_WEAK)
278 /* This determines whether or not we support the discriminator
279 attribute in the .loc directive. */
280 #ifndef SUPPORTS_DISCRIMINATOR
281 #ifdef HAVE_GAS_DISCRIMINATOR
282 #define SUPPORTS_DISCRIMINATOR 1
284 #define SUPPORTS_DISCRIMINATOR 0
288 /* This determines whether or not we support marking sections with
289 SHF_GNU_RETAIN flag. Also require .init_array/.fini_array section
290 for constructors and destructors. */
291 #ifndef SUPPORTS_SHF_GNU_RETAIN
292 #if HAVE_GAS_SHF_GNU_RETAIN && HAVE_INITFINI_ARRAY_SUPPORT
293 #define SUPPORTS_SHF_GNU_RETAIN 1
295 #define SUPPORTS_SHF_GNU_RETAIN 0
299 /* This determines whether or not we support link-once semantics. */
300 #ifndef SUPPORTS_ONE_ONLY
301 #ifdef MAKE_DECL_ONE_ONLY
302 #define SUPPORTS_ONE_ONLY 1
304 #define SUPPORTS_ONE_ONLY 0
308 /* This determines whether weak symbols must be left out of a static
309 archive's table of contents. Defining this macro to be nonzero has
310 the consequence that certain symbols will not be made weak that
311 otherwise would be. The C++ ABI requires this macro to be zero;
312 see the documentation. */
313 #ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
314 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
317 /* This determines whether or not we need linkonce unwind information. */
318 #ifndef TARGET_USES_WEAK_UNWIND_INFO
319 #define TARGET_USES_WEAK_UNWIND_INFO 0
322 /* By default, there is no prefix on user-defined symbols. */
323 #ifndef USER_LABEL_PREFIX
324 #define USER_LABEL_PREFIX ""
327 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
328 provide a weak attribute. Else define it to nothing.
330 This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
331 not available at that time.
333 Note, this is only for use by target files which we know are to be
335 #ifndef TARGET_ATTRIBUTE_WEAK
337 # define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
339 # define TARGET_ATTRIBUTE_WEAK
343 /* By default we can assume that all global symbols are in one namespace,
344 across all shared libraries. */
345 #ifndef MULTIPLE_SYMBOL_SPACES
346 # define MULTIPLE_SYMBOL_SPACES 0
349 /* If the target supports init_priority C++ attribute, give
350 SUPPORTS_INIT_PRIORITY a nonzero value. */
351 #ifndef SUPPORTS_INIT_PRIORITY
352 #define SUPPORTS_INIT_PRIORITY 1
353 #endif /* SUPPORTS_INIT_PRIORITY */
355 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
356 the rest of the DWARF 2 frame unwind support is also provided. */
357 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
358 #define DWARF2_UNWIND_INFO 1
361 /* If we have named sections, and we're using crtstuff to run ctors,
362 use them for registering eh frame information. */
363 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
364 && !defined (EH_FRAME_THROUGH_COLLECT2)
365 #ifndef EH_FRAME_SECTION_NAME
366 #define EH_FRAME_SECTION_NAME ".eh_frame"
370 /* On many systems, different EH table encodings are used under
371 difference circumstances. Some will require runtime relocations;
372 some will not. For those that do not require runtime relocations,
373 we would like to make the table read-only. However, since the
374 read-only tables may need to be combined with read-write tables
375 that do require runtime relocation, it is not safe to make the
376 tables read-only unless the linker will merge read-only and
377 read-write sections into a single read-write section. If your
378 linker does not have this ability, but your system is such that no
379 encoding used with non-PIC code will ever require a runtime
380 relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in
381 your target configuration file. */
382 #ifndef EH_TABLES_CAN_BE_READ_ONLY
383 #ifdef HAVE_LD_RO_RW_SECTION_MIXING
384 #define EH_TABLES_CAN_BE_READ_ONLY 1
386 #define EH_TABLES_CAN_BE_READ_ONLY 0
390 /* Provide defaults for stuff that may not be defined when using
392 #ifndef EH_RETURN_DATA_REGNO
393 #define EH_RETURN_DATA_REGNO(N) INVALID_REGNUM
396 /* Offset between the eh handler address and entry in eh tables. */
397 #ifndef RETURN_ADDR_OFFSET
398 #define RETURN_ADDR_OFFSET 0
401 #ifndef MASK_RETURN_ADDR
402 #define MASK_RETURN_ADDR NULL_RTX
405 /* Number of hardware registers that go into the DWARF-2 unwind info.
406 If not defined, equals FIRST_PSEUDO_REGISTER */
408 #ifndef DWARF_FRAME_REGISTERS
409 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
412 /* Offsets recorded in opcodes are a multiple of this alignment factor. */
413 #ifndef DWARF_CIE_DATA_ALIGNMENT
414 #ifdef STACK_GROWS_DOWNWARD
415 #define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD))
417 #define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD)
421 /* The DWARF 2 CFA column which tracks the return address. Normally this
422 is the column for PC, or the first column after all of the hard
424 #ifndef DWARF_FRAME_RETURN_COLUMN
426 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM)
428 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGISTERS
432 /* How to renumber registers for dbx and gdb. If not defined, assume
433 no renumbering is necessary. */
435 #ifndef DBX_REGISTER_NUMBER
436 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
439 /* The mapping from gcc register number to DWARF 2 CFA column number.
440 By default, we just provide columns for all registers. */
441 #ifndef DWARF_FRAME_REGNUM
442 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
445 /* The mapping from dwarf CFA reg number to internal dwarf reg numbers. */
446 #ifndef DWARF_REG_TO_UNWIND_COLUMN
447 #define DWARF_REG_TO_UNWIND_COLUMN(REGNO) (REGNO)
450 /* Map register numbers held in the call frame info that gcc has
451 collected using DWARF_FRAME_REGNUM to those that should be output in
452 .debug_frame and .eh_frame. */
453 #ifndef DWARF2_FRAME_REG_OUT
454 #define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) (REGNO)
457 /* The size of addresses as they appear in the Dwarf 2 data.
458 Some architectures use word addresses to refer to code locations,
459 but Dwarf 2 info always uses byte addresses. On such machines,
460 Dwarf 2 addresses need to be larger than the architecture's
462 #ifndef DWARF2_ADDR_SIZE
463 #define DWARF2_ADDR_SIZE ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)
466 /* The size in bytes of a DWARF field indicating an offset or length
467 relative to a debug info section, specified to be 4 bytes in the
468 DWARF-2 specification. The SGI/MIPS ABI defines it to be the same
470 #ifndef DWARF_OFFSET_SIZE
471 #define DWARF_OFFSET_SIZE 4
474 /* The size in bytes of a DWARF 4 type signature. */
475 #ifndef DWARF_TYPE_SIGNATURE_SIZE
476 #define DWARF_TYPE_SIGNATURE_SIZE 8
479 /* Default sizes for base C types. If the sizes are different for
480 your target, you should override these values by defining the
481 appropriate symbols in your tm.h file. */
483 #ifndef BITS_PER_WORD
484 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
487 #ifndef CHAR_TYPE_SIZE
488 #define CHAR_TYPE_SIZE BITS_PER_UNIT
491 #ifndef BOOL_TYPE_SIZE
492 /* `bool' has size and alignment `1', on almost all platforms. */
493 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
496 #ifndef SHORT_TYPE_SIZE
497 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
500 #ifndef INT_TYPE_SIZE
501 #define INT_TYPE_SIZE BITS_PER_WORD
504 #ifndef LONG_TYPE_SIZE
505 #define LONG_TYPE_SIZE BITS_PER_WORD
508 #ifndef LONG_LONG_TYPE_SIZE
509 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
512 #ifndef WCHAR_TYPE_SIZE
513 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
516 #ifndef FLOAT_TYPE_SIZE
517 #define FLOAT_TYPE_SIZE BITS_PER_WORD
520 #ifndef DOUBLE_TYPE_SIZE
521 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
524 #ifndef LONG_DOUBLE_TYPE_SIZE
525 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
528 #ifndef DECIMAL32_TYPE_SIZE
529 #define DECIMAL32_TYPE_SIZE 32
532 #ifndef DECIMAL64_TYPE_SIZE
533 #define DECIMAL64_TYPE_SIZE 64
536 #ifndef DECIMAL128_TYPE_SIZE
537 #define DECIMAL128_TYPE_SIZE 128
540 #ifndef SHORT_FRACT_TYPE_SIZE
541 #define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT
544 #ifndef FRACT_TYPE_SIZE
545 #define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2)
548 #ifndef LONG_FRACT_TYPE_SIZE
549 #define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4)
552 #ifndef LONG_LONG_FRACT_TYPE_SIZE
553 #define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8)
556 #ifndef SHORT_ACCUM_TYPE_SIZE
557 #define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2)
560 #ifndef ACCUM_TYPE_SIZE
561 #define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2)
564 #ifndef LONG_ACCUM_TYPE_SIZE
565 #define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2)
568 #ifndef LONG_LONG_ACCUM_TYPE_SIZE
569 #define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2)
572 /* We let tm.h override the types used here, to handle trivial differences
573 such as the choice of unsigned int or long unsigned int for size_t.
574 When machines start needing nontrivial differences in the size type,
575 it would be best to do something here to figure out automatically
576 from other information what type to use. */
579 #define SIZE_TYPE "long unsigned int"
583 #define SIZETYPE SIZE_TYPE
587 #define PID_TYPE "int"
590 /* If GCC knows the exact uint_least16_t and uint_least32_t types from
591 <stdint.h>, use them for char16_t and char32_t. Otherwise, use
592 these guesses; getting the wrong type of a given width will not
593 affect C++ name mangling because in C++ these are distinct types
597 #define CHAR8_TYPE "unsigned char"
600 #ifdef UINT_LEAST16_TYPE
601 #define CHAR16_TYPE UINT_LEAST16_TYPE
603 #define CHAR16_TYPE "short unsigned int"
606 #ifdef UINT_LEAST32_TYPE
607 #define CHAR32_TYPE UINT_LEAST32_TYPE
609 #define CHAR32_TYPE "unsigned int"
613 #define WCHAR_TYPE "int"
616 /* WCHAR_TYPE gets overridden by -fshort-wchar. */
617 #define MODIFIED_WCHAR_TYPE \
618 (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE)
621 #define PTRDIFF_TYPE "long int"
625 #define WINT_TYPE "unsigned int"
629 #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
631 : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
637 #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
639 : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
640 ? "long unsigned int" \
641 : "long long unsigned int"))
645 /* There are no default definitions of these <stdint.h> types. */
647 #ifndef SIG_ATOMIC_TYPE
648 #define SIG_ATOMIC_TYPE ((const char *) NULL)
652 #define INT8_TYPE ((const char *) NULL)
656 #define INT16_TYPE ((const char *) NULL)
660 #define INT32_TYPE ((const char *) NULL)
664 #define INT64_TYPE ((const char *) NULL)
668 #define UINT8_TYPE ((const char *) NULL)
672 #define UINT16_TYPE ((const char *) NULL)
676 #define UINT32_TYPE ((const char *) NULL)
680 #define UINT64_TYPE ((const char *) NULL)
683 #ifndef INT_LEAST8_TYPE
684 #define INT_LEAST8_TYPE ((const char *) NULL)
687 #ifndef INT_LEAST16_TYPE
688 #define INT_LEAST16_TYPE ((const char *) NULL)
691 #ifndef INT_LEAST32_TYPE
692 #define INT_LEAST32_TYPE ((const char *) NULL)
695 #ifndef INT_LEAST64_TYPE
696 #define INT_LEAST64_TYPE ((const char *) NULL)
699 #ifndef UINT_LEAST8_TYPE
700 #define UINT_LEAST8_TYPE ((const char *) NULL)
703 #ifndef UINT_LEAST16_TYPE
704 #define UINT_LEAST16_TYPE ((const char *) NULL)
707 #ifndef UINT_LEAST32_TYPE
708 #define UINT_LEAST32_TYPE ((const char *) NULL)
711 #ifndef UINT_LEAST64_TYPE
712 #define UINT_LEAST64_TYPE ((const char *) NULL)
715 #ifndef INT_FAST8_TYPE
716 #define INT_FAST8_TYPE ((const char *) NULL)
719 #ifndef INT_FAST16_TYPE
720 #define INT_FAST16_TYPE ((const char *) NULL)
723 #ifndef INT_FAST32_TYPE
724 #define INT_FAST32_TYPE ((const char *) NULL)
727 #ifndef INT_FAST64_TYPE
728 #define INT_FAST64_TYPE ((const char *) NULL)
731 #ifndef UINT_FAST8_TYPE
732 #define UINT_FAST8_TYPE ((const char *) NULL)
735 #ifndef UINT_FAST16_TYPE
736 #define UINT_FAST16_TYPE ((const char *) NULL)
739 #ifndef UINT_FAST32_TYPE
740 #define UINT_FAST32_TYPE ((const char *) NULL)
743 #ifndef UINT_FAST64_TYPE
744 #define UINT_FAST64_TYPE ((const char *) NULL)
748 #define INTPTR_TYPE ((const char *) NULL)
752 #define UINTPTR_TYPE ((const char *) NULL)
755 /* Width in bits of a pointer. Mind the value of the macro `Pmode'. */
757 #define POINTER_SIZE BITS_PER_WORD
759 #ifndef POINTER_SIZE_UNITS
760 #define POINTER_SIZE_UNITS ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)
764 #ifndef PIC_OFFSET_TABLE_REGNUM
765 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
768 #ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
769 #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 0
772 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
773 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
776 #ifndef TARGET_DECLSPEC
777 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
778 /* If the target supports the "dllimport" attribute, users are
779 probably used to the "__declspec" syntax. */
780 #define TARGET_DECLSPEC 1
782 #define TARGET_DECLSPEC 0
786 /* By default, the preprocessor should be invoked the same way in C++
788 #ifndef CPLUSPLUS_CPP_SPEC
790 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
794 #ifndef ACCUMULATE_OUTGOING_ARGS
795 #define ACCUMULATE_OUTGOING_ARGS 0
798 /* By default, use the GNU runtime for Objective C. */
799 #ifndef NEXT_OBJC_RUNTIME
800 #define NEXT_OBJC_RUNTIME 0
803 /* Decide whether a function's arguments should be processed
804 from first to last or from last to first.
806 They should if the stack and args grow in opposite directions, but
807 only if we have push insns. */
811 #ifndef PUSH_ARGS_REVERSED
812 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
813 #define PUSH_ARGS_REVERSED targetm.calls.push_argument (0)
819 #ifndef PUSH_ARGS_REVERSED
820 #define PUSH_ARGS_REVERSED 0
823 /* Default value for the alignment (in bits) a C conformant malloc has to
824 provide. This default is intended to be safe and always correct. */
825 #ifndef MALLOC_ABI_ALIGNMENT
826 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
829 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
830 STACK_BOUNDARY is required. */
831 #ifndef PREFERRED_STACK_BOUNDARY
832 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
835 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not
837 #ifndef INCOMING_STACK_BOUNDARY
838 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY
841 #ifndef TARGET_DEFAULT_PACK_STRUCT
842 #define TARGET_DEFAULT_PACK_STRUCT 0
845 /* By default, the vtable entries are void pointers, the so the alignment
846 is the same as pointer alignment. The value of this macro specifies
847 the alignment of the vtable entry in bits. It should be defined only
848 when special alignment is necessary. */
849 #ifndef TARGET_VTABLE_ENTRY_ALIGN
850 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
853 /* There are a few non-descriptor entries in the vtable at offsets below
854 zero. If these entries must be padded (say, to preserve the alignment
855 specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
856 words in each data entry. */
857 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
858 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
861 /* Decide whether it is safe to use a local alias for a virtual function
862 when constructing thunks. */
863 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
864 #ifdef ASM_OUTPUT_DEF
865 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
867 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
871 /* Decide whether target supports aliases. */
872 #ifndef TARGET_SUPPORTS_ALIASES
873 #ifdef ASM_OUTPUT_DEF
874 #define TARGET_SUPPORTS_ALIASES 1
876 #define TARGET_SUPPORTS_ALIASES 0
880 /* Select a format to encode pointers in exception handling data. We
881 prefer those that result in fewer dynamic relocations. Assume no
882 special support here and encode direct references. */
883 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
884 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) DW_EH_PE_absptr
887 /* By default, the C++ compiler will use the lowest bit of the pointer
888 to function to indicate a pointer-to-member-function points to a
889 virtual member function. However, if FUNCTION_BOUNDARY indicates
890 function addresses aren't always even, the lowest bit of the delta
891 field will be used. */
892 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
893 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
894 (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
895 ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
898 #ifndef DEFAULT_GDB_EXTENSIONS
899 #define DEFAULT_GDB_EXTENSIONS 1
902 /* Default to DWARF2_DEBUGGING_INFO. Legacy targets can choose different
903 by defining PREFERRED_DEBUGGING_TYPE. */
904 #ifndef PREFERRED_DEBUGGING_TYPE
905 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_LINENO_DEBUGGING_INFO
906 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
908 #error You must define PREFERRED_DEBUGGING_TYPE if DWARF is not supported
912 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
913 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
916 /* True if the targets integer-comparison functions return { 0, 1, 2
917 } to indicate { <, ==, > }. False if { -1, 0, 1 } is used
918 instead. The libgcc routines are biased. */
919 #ifndef TARGET_LIB_INT_CMP_BIASED
920 #define TARGET_LIB_INT_CMP_BIASED (true)
923 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
924 then the word-endianness is the same as for integers. */
925 #ifndef FLOAT_WORDS_BIG_ENDIAN
926 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
929 #ifndef REG_WORDS_BIG_ENDIAN
930 #define REG_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
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 GCC_VERSION >= 3000 && defined IN_GCC
953 /* These old constraint macros shouldn't appear anywhere in a
954 configuration using MD constraint definitions. */
957 /* Determin whether the target runtime library is Bionic */
958 #ifndef TARGET_HAS_BIONIC
959 #define TARGET_HAS_BIONIC 0
962 /* Indicate that CLZ and CTZ are undefined at zero. */
963 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
964 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
966 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
967 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
970 /* Provide a default value for STORE_FLAG_VALUE. */
971 #ifndef STORE_FLAG_VALUE
972 #define STORE_FLAG_VALUE 1
975 /* This macro is used to determine what the largest unit size that
976 move_by_pieces can use is. */
978 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
979 move efficiently, as opposed to MOVE_MAX which is the maximum
980 number of bytes we can move with a single instruction. */
982 #ifndef MOVE_MAX_PIECES
983 #define MOVE_MAX_PIECES MOVE_MAX
986 /* STORE_MAX_PIECES is the number of bytes at a time that we can
987 store efficiently. Due to internal GCC limitations, this is
988 MOVE_MAX_PIECES limited by the number of bytes GCC can represent
989 for an immediate constant. */
991 #ifndef STORE_MAX_PIECES
992 #define STORE_MAX_PIECES MIN (MOVE_MAX_PIECES, 2 * sizeof (HOST_WIDE_INT))
995 /* Likewise for block comparisons. */
996 #ifndef COMPARE_MAX_PIECES
997 #define COMPARE_MAX_PIECES MOVE_MAX_PIECES
1000 #ifndef MAX_MOVE_MAX
1001 #define MAX_MOVE_MAX MOVE_MAX
1004 #ifndef MIN_UNITS_PER_WORD
1005 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
1008 #ifndef MAX_BITS_PER_WORD
1009 #define MAX_BITS_PER_WORD BITS_PER_WORD
1012 #ifndef STACK_POINTER_OFFSET
1013 #define STACK_POINTER_OFFSET 0
1017 #define LOCAL_REGNO(REGNO) 0
1020 #ifndef HONOR_REG_ALLOC_ORDER
1021 #define HONOR_REG_ALLOC_ORDER 0
1024 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1025 the stack pointer does not matter. The value is tested only in
1026 functions that have frame pointers. */
1027 #ifndef EXIT_IGNORE_STACK
1028 #define EXIT_IGNORE_STACK 0
1031 /* Assume that case vectors are not pc-relative. */
1032 #ifndef CASE_VECTOR_PC_RELATIVE
1033 #define CASE_VECTOR_PC_RELATIVE 0
1036 /* Force minimum alignment to be able to use the least significant bits
1037 for distinguishing descriptor addresses from code addresses. */
1038 #define FUNCTION_ALIGNMENT(ALIGN) \
1039 (lang_hooks.custom_function_descriptors \
1040 && targetm.calls.custom_function_descriptors > 0 \
1042 2 * targetm.calls.custom_function_descriptors * BITS_PER_UNIT)\
1045 /* Assume that trampolines need function alignment. */
1046 #ifndef TRAMPOLINE_ALIGNMENT
1047 #define TRAMPOLINE_ALIGNMENT FUNCTION_ALIGNMENT (FUNCTION_BOUNDARY)
1050 /* Register mappings for target machines without register windows. */
1051 #ifndef INCOMING_REGNO
1052 #define INCOMING_REGNO(N) (N)
1055 #ifndef OUTGOING_REGNO
1056 #define OUTGOING_REGNO(N) (N)
1059 #ifndef SHIFT_COUNT_TRUNCATED
1060 #define SHIFT_COUNT_TRUNCATED 0
1063 #ifndef LEGITIMATE_PIC_OPERAND_P
1064 #define LEGITIMATE_PIC_OPERAND_P(X) 1
1067 #ifndef TARGET_MEM_CONSTRAINT
1068 #define TARGET_MEM_CONSTRAINT 'm'
1071 #ifndef REVERSIBLE_CC_MODE
1072 #define REVERSIBLE_CC_MODE(MODE) 0
1075 /* Biggest alignment supported by the object file format of this machine. */
1076 #ifndef MAX_OFILE_ALIGNMENT
1077 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
1080 #ifndef FRAME_GROWS_DOWNWARD
1081 #define FRAME_GROWS_DOWNWARD 0
1084 #ifndef RETURN_ADDR_IN_PREVIOUS_FRAME
1085 #define RETURN_ADDR_IN_PREVIOUS_FRAME 0
1088 /* On most machines, the CFA coincides with the first incoming parm. */
1089 #ifndef ARG_POINTER_CFA_OFFSET
1090 #define ARG_POINTER_CFA_OFFSET(FNDECL) \
1091 (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
1094 /* On most machines, we use the CFA as DW_AT_frame_base. */
1095 #ifndef CFA_FRAME_BASE_OFFSET
1096 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0
1099 /* The offset from the incoming value of %sp to the top of the stack frame
1100 for the current function. */
1101 #ifndef INCOMING_FRAME_SP_OFFSET
1102 #define INCOMING_FRAME_SP_OFFSET 0
1105 #ifndef HARD_REGNO_NREGS_HAS_PADDING
1106 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
1107 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
1110 #ifndef OUTGOING_REG_PARM_STACK_SPACE
1111 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
1114 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
1115 the backend. MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
1116 effort stack alignment supported by the backend. If the backend
1117 supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
1118 MAX_STACK_ALIGNMENT are the same. Otherwise, the incoming stack
1119 boundary will limit the maximum guaranteed stack alignment. */
1120 #ifdef MAX_STACK_ALIGNMENT
1121 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
1123 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY
1124 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
1127 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
1129 #ifndef LOCAL_ALIGNMENT
1130 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
1133 #ifndef STACK_SLOT_ALIGNMENT
1134 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
1135 ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
1138 #ifndef LOCAL_DECL_ALIGNMENT
1139 #define LOCAL_DECL_ALIGNMENT(DECL) \
1140 LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
1143 #ifndef MINIMUM_ALIGNMENT
1144 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN)
1147 /* Alignment value for attribute ((aligned)). */
1148 #ifndef ATTRIBUTE_ALIGNED_VALUE
1149 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
1152 /* For most ports anything that evaluates to a constant symbolic
1153 or integer value is acceptable as a constant address. */
1154 #ifndef CONSTANT_ADDRESS_P
1155 #define CONSTANT_ADDRESS_P(X) (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE)
1158 #ifndef MAX_FIXED_MODE_SIZE
1159 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
1162 /* Nonzero if structures and unions should be returned in memory.
1164 This should only be defined if compatibility with another compiler or
1165 with an ABI is needed, because it results in slower code. */
1167 #ifndef DEFAULT_PCC_STRUCT_RETURN
1168 #define DEFAULT_PCC_STRUCT_RETURN 1
1171 #ifndef PCC_BITFIELD_TYPE_MATTERS
1172 #define PCC_BITFIELD_TYPE_MATTERS false
1175 #ifndef INSN_SETS_ARE_DELAYED
1176 #define INSN_SETS_ARE_DELAYED(INSN) false
1179 #ifndef INSN_REFERENCES_ARE_DELAYED
1180 #define INSN_REFERENCES_ARE_DELAYED(INSN) false
1183 #ifndef NO_FUNCTION_CSE
1184 #define NO_FUNCTION_CSE false
1187 #ifndef HARD_REGNO_RENAME_OK
1188 #define HARD_REGNO_RENAME_OK(FROM, TO) true
1191 #ifndef EPILOGUE_USES
1192 #define EPILOGUE_USES(REG) false
1195 #ifndef ARGS_GROW_DOWNWARD
1196 #define ARGS_GROW_DOWNWARD 0
1199 #ifndef STACK_GROWS_DOWNWARD
1200 #define STACK_GROWS_DOWNWARD 0
1203 #ifndef STACK_PUSH_CODE
1204 #if STACK_GROWS_DOWNWARD
1205 #define STACK_PUSH_CODE PRE_DEC
1207 #define STACK_PUSH_CODE PRE_INC
1211 /* Default value for flag_pie when flag_pie is initialized to -1:
1212 --enable-default-pie: Default flag_pie to -fPIE.
1213 --disable-default-pie: Default flag_pie to 0.
1215 #ifdef ENABLE_DEFAULT_PIE
1216 # ifndef DEFAULT_FLAG_PIE
1217 # define DEFAULT_FLAG_PIE 2
1220 # define DEFAULT_FLAG_PIE 0
1223 #ifndef SWITCHABLE_TARGET
1224 #define SWITCHABLE_TARGET 0
1227 /* If the target supports integers that are wider than two
1228 HOST_WIDE_INTs on the host compiler, then the target should define
1229 TARGET_SUPPORTS_WIDE_INT and make the appropriate fixups.
1230 Otherwise the compiler really is not robust. */
1231 #ifndef TARGET_SUPPORTS_WIDE_INT
1232 #define TARGET_SUPPORTS_WIDE_INT 0
1235 #ifndef SHORT_IMMEDIATES_SIGN_EXTEND
1236 #define SHORT_IMMEDIATES_SIGN_EXTEND 0
1239 #ifndef WORD_REGISTER_OPERATIONS
1240 #define WORD_REGISTER_OPERATIONS 0
1243 #ifndef LOAD_EXTEND_OP
1244 #define LOAD_EXTEND_OP(M) UNKNOWN
1247 #ifndef INITIAL_FRAME_ADDRESS_RTX
1248 #define INITIAL_FRAME_ADDRESS_RTX NULL
1251 #ifndef SETUP_FRAME_ADDRESSES
1252 #define SETUP_FRAME_ADDRESSES() do { } while (0)
1255 #ifndef DYNAMIC_CHAIN_ADDRESS
1256 #define DYNAMIC_CHAIN_ADDRESS(x) (x)
1259 #ifndef FRAME_ADDR_RTX
1260 #define FRAME_ADDR_RTX(x) (x)
1263 #ifndef REVERSE_CONDITION
1264 #define REVERSE_CONDITION(code, mode) reverse_condition (code)
1267 #ifndef TARGET_PECOFF
1268 #define TARGET_PECOFF 0
1272 #define TARGET_COFF 0
1275 #ifndef EH_RETURN_HANDLER_RTX
1276 #define EH_RETURN_HANDLER_RTX NULL
1279 #ifdef GCC_INSN_FLAGS_H
1280 /* Dependent default target macro definitions
1282 This section of defaults.h defines target macros that depend on generated
1283 headers. This is a bit awkward: We want to put all default definitions
1284 for target macros in defaults.h, but some of the defaults depend on the
1285 HAVE_* flags defines of insn-flags.h. But insn-flags.h is not always
1286 included by files that do include defaults.h.
1288 Fortunately, the default macro definitions that depend on the HAVE_*
1289 macros are also the ones that will only be used inside GCC itself, i.e.
1290 not in the gen* programs or in target objects like libgcc.
1292 Obviously, it would be best to keep this section of defaults.h as small
1293 as possible, by converting the macros defined below to target hooks or
1297 /* The default branch cost is 1. */
1299 #define BRANCH_COST(speed_p, predictable_p) 1
1302 /* If a memory-to-memory move would take MOVE_RATIO or more simple
1303 move-instruction sequences, we will do a cpymem or libcall instead. */
1306 #if defined (HAVE_cpymemqi) || defined (HAVE_cpymemhi) || defined (HAVE_cpymemsi) || defined (HAVE_cpymemdi) || defined (HAVE_cpymemti)
1307 #define MOVE_RATIO(speed) 2
1309 /* If we are optimizing for space (-Os), cut down the default move ratio. */
1310 #define MOVE_RATIO(speed) ((speed) ? 15 : 3)
1314 /* If a clear memory operation would take CLEAR_RATIO or more simple
1315 move-instruction sequences, we will do a setmem or libcall instead. */
1318 #if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
1319 #define CLEAR_RATIO(speed) 2
1321 /* If we are optimizing for space, cut down the default clear ratio. */
1322 #define CLEAR_RATIO(speed) ((speed) ? 15 :3)
1326 /* If a memory set (to value other than zero) operation would take
1327 SET_RATIO or more simple move-instruction sequences, we will do a setmem
1328 or libcall instead. */
1330 #define SET_RATIO(speed) MOVE_RATIO (speed)
1333 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
1334 Normally move_insn, so Pmode stack pointer. */
1336 #ifndef STACK_SAVEAREA_MODE
1337 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
1340 /* Supply a default definition of STACK_SIZE_MODE for
1341 allocate_dynamic_stack_space. Normally PLUS/MINUS, so word_mode. */
1343 #ifndef STACK_SIZE_MODE
1344 #define STACK_SIZE_MODE word_mode
1347 /* Default value for flag_stack_protect when flag_stack_protect is initialized to -1:
1348 --enable-default-ssp: Default flag_stack_protect to -fstack-protector-strong.
1349 --disable-default-ssp: Default flag_stack_protect to 0.
1351 #ifdef ENABLE_DEFAULT_SSP
1352 # ifndef DEFAULT_FLAG_SSP
1353 # define DEFAULT_FLAG_SSP 3
1356 # define DEFAULT_FLAG_SSP 0
1359 /* Provide default values for the macros controlling stack checking. */
1361 /* The default is neither full builtin stack checking... */
1362 #ifndef STACK_CHECK_BUILTIN
1363 #define STACK_CHECK_BUILTIN 0
1366 /* ...nor static builtin stack checking. */
1367 #ifndef STACK_CHECK_STATIC_BUILTIN
1368 #define STACK_CHECK_STATIC_BUILTIN 0
1371 /* The default interval is one page (4096 bytes). */
1372 #ifndef STACK_CHECK_PROBE_INTERVAL_EXP
1373 #define STACK_CHECK_PROBE_INTERVAL_EXP 12
1376 /* The default is not to move the stack pointer. */
1377 #ifndef STACK_CHECK_MOVING_SP
1378 #define STACK_CHECK_MOVING_SP 0
1381 /* This is a kludge to try to capture the discrepancy between the old
1382 mechanism (generic stack checking) and the new mechanism (static
1383 builtin stack checking). STACK_CHECK_PROTECT needs to be bumped
1384 for the latter because part of the protection area is effectively
1385 included in STACK_CHECK_MAX_FRAME_SIZE for the former. */
1386 #ifdef STACK_CHECK_PROTECT
1387 #define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
1389 #define STACK_OLD_CHECK_PROTECT \
1390 (!global_options.x_flag_exceptions \
1391 ? 75 * UNITS_PER_WORD \
1392 : targetm_common.except_unwind_info (&global_options) == UI_SJLJ \
1397 /* Minimum amount of stack required to recover from an anticipated stack
1398 overflow detection. The default value conveys an estimate of the amount
1399 of stack required to propagate an exception. */
1400 #ifndef STACK_CHECK_PROTECT
1401 #define STACK_CHECK_PROTECT \
1402 (!global_options.x_flag_exceptions \
1404 : targetm_common.except_unwind_info (&global_options) == UI_SJLJ \
1409 /* Make the maximum frame size be the largest we can and still only need
1410 one probe per function. */
1411 #ifndef STACK_CHECK_MAX_FRAME_SIZE
1412 #define STACK_CHECK_MAX_FRAME_SIZE \
1413 ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD)
1416 /* This is arbitrary, but should be large enough everywhere. */
1417 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
1418 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
1421 /* Provide a reasonable default for the maximum size of an object to
1422 allocate in the fixed frame. We may need to be able to make this
1423 controllable by the user at some point. */
1424 #ifndef STACK_CHECK_MAX_VAR_SIZE
1425 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
1428 /* By default, the C++ compiler will use function addresses in the
1429 vtable entries. Setting this nonzero tells the compiler to use
1430 function descriptors instead. The value of this macro says how
1431 many words wide the descriptor is (normally 2). It is assumed
1432 that the address of a function descriptor may be treated as a
1433 pointer to a function. */
1434 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
1435 #define TARGET_VTABLE_USES_DESCRIPTORS 0
1438 #endif /* GCC_INSN_FLAGS_H */
1440 #ifndef DWARF_GNAT_ENCODINGS_DEFAULT
1441 #define DWARF_GNAT_ENCODINGS_DEFAULT DWARF_GNAT_ENCODINGS_GDB
1444 #ifndef USED_FOR_TARGET
1445 /* Done this way to keep gengtype happy. */
1446 #if BITS_PER_UNIT == 8
1447 #define TARGET_UNIT uint8_t
1448 #elif BITS_PER_UNIT == 16
1449 #define TARGET_UNIT uint16_t
1450 #elif BITS_PER_UNIT == 32
1451 #define TARGET_UNIT uint32_t
1453 #error Unknown BITS_PER_UNIT
1455 typedef TARGET_UNIT target_unit
;
1458 #endif /* ! GCC_DEFAULTS_H */