1 /* Definitions of various defaults for tm.h macros.
2 Copyright (C) 1992-2021 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 marking sections with
290 SHF_GNU_RETAIN flag. Also require .init_array/.fini_array section
291 for constructors and destructors. */
292 #ifndef SUPPORTS_SHF_GNU_RETAIN
293 #if HAVE_GAS_SHF_GNU_RETAIN && HAVE_INITFINI_ARRAY_SUPPORT
294 #define SUPPORTS_SHF_GNU_RETAIN 1
296 #define SUPPORTS_SHF_GNU_RETAIN 0
300 /* This determines whether or not we support link-once semantics. */
301 #ifndef SUPPORTS_ONE_ONLY
302 #ifdef MAKE_DECL_ONE_ONLY
303 #define SUPPORTS_ONE_ONLY 1
305 #define SUPPORTS_ONE_ONLY 0
309 /* This determines whether weak symbols must be left out of a static
310 archive's table of contents. Defining this macro to be nonzero has
311 the consequence that certain symbols will not be made weak that
312 otherwise would be. The C++ ABI requires this macro to be zero;
313 see the documentation. */
314 #ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
315 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
318 /* This determines whether or not we need linkonce unwind information. */
319 #ifndef TARGET_USES_WEAK_UNWIND_INFO
320 #define TARGET_USES_WEAK_UNWIND_INFO 0
323 /* By default, there is no prefix on user-defined symbols. */
324 #ifndef USER_LABEL_PREFIX
325 #define USER_LABEL_PREFIX ""
328 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
329 provide a weak attribute. Else define it to nothing.
331 This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
332 not available at that time.
334 Note, this is only for use by target files which we know are to be
336 #ifndef TARGET_ATTRIBUTE_WEAK
338 # define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
340 # define TARGET_ATTRIBUTE_WEAK
344 /* By default we can assume that all global symbols are in one namespace,
345 across all shared libraries. */
346 #ifndef MULTIPLE_SYMBOL_SPACES
347 # define MULTIPLE_SYMBOL_SPACES 0
350 /* If the target supports init_priority C++ attribute, give
351 SUPPORTS_INIT_PRIORITY a nonzero value. */
352 #ifndef SUPPORTS_INIT_PRIORITY
353 #define SUPPORTS_INIT_PRIORITY 1
354 #endif /* SUPPORTS_INIT_PRIORITY */
356 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
357 the rest of the DWARF 2 frame unwind support is also provided. */
358 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
359 #define DWARF2_UNWIND_INFO 1
362 /* If we have named sections, and we're using crtstuff to run ctors,
363 use them for registering eh frame information. */
364 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
365 && !defined (EH_FRAME_THROUGH_COLLECT2)
366 #ifndef EH_FRAME_SECTION_NAME
367 #define EH_FRAME_SECTION_NAME ".eh_frame"
371 /* On many systems, different EH table encodings are used under
372 difference circumstances. Some will require runtime relocations;
373 some will not. For those that do not require runtime relocations,
374 we would like to make the table read-only. However, since the
375 read-only tables may need to be combined with read-write tables
376 that do require runtime relocation, it is not safe to make the
377 tables read-only unless the linker will merge read-only and
378 read-write sections into a single read-write section. If your
379 linker does not have this ability, but your system is such that no
380 encoding used with non-PIC code will ever require a runtime
381 relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in
382 your target configuration file. */
383 #ifndef EH_TABLES_CAN_BE_READ_ONLY
384 #ifdef HAVE_LD_RO_RW_SECTION_MIXING
385 #define EH_TABLES_CAN_BE_READ_ONLY 1
387 #define EH_TABLES_CAN_BE_READ_ONLY 0
391 /* Provide defaults for stuff that may not be defined when using
393 #ifndef EH_RETURN_DATA_REGNO
394 #define EH_RETURN_DATA_REGNO(N) INVALID_REGNUM
397 /* Offset between the eh handler address and entry in eh tables. */
398 #ifndef RETURN_ADDR_OFFSET
399 #define RETURN_ADDR_OFFSET 0
402 #ifndef MASK_RETURN_ADDR
403 #define MASK_RETURN_ADDR NULL_RTX
406 /* Number of hardware registers that go into the DWARF-2 unwind info.
407 If not defined, equals FIRST_PSEUDO_REGISTER */
409 #ifndef DWARF_FRAME_REGISTERS
410 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
413 /* Offsets recorded in opcodes are a multiple of this alignment factor. */
414 #ifndef DWARF_CIE_DATA_ALIGNMENT
415 #ifdef STACK_GROWS_DOWNWARD
416 #define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD))
418 #define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD)
422 /* The DWARF 2 CFA column which tracks the return address. Normally this
423 is the column for PC, or the first column after all of the hard
425 #ifndef DWARF_FRAME_RETURN_COLUMN
427 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM)
429 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGISTERS
433 /* How to renumber registers for dbx and gdb. If not defined, assume
434 no renumbering is necessary. */
436 #ifndef DBX_REGISTER_NUMBER
437 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
440 /* The mapping from gcc register number to DWARF 2 CFA column number.
441 By default, we just provide columns for all registers. */
442 #ifndef DWARF_FRAME_REGNUM
443 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
446 /* The mapping from dwarf CFA reg number to internal dwarf reg numbers. */
447 #ifndef DWARF_REG_TO_UNWIND_COLUMN
448 #define DWARF_REG_TO_UNWIND_COLUMN(REGNO) (REGNO)
451 /* Map register numbers held in the call frame info that gcc has
452 collected using DWARF_FRAME_REGNUM to those that should be output in
453 .debug_frame and .eh_frame. */
454 #ifndef DWARF2_FRAME_REG_OUT
455 #define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) (REGNO)
458 /* The size of addresses as they appear in the Dwarf 2 data.
459 Some architectures use word addresses to refer to code locations,
460 but Dwarf 2 info always uses byte addresses. On such machines,
461 Dwarf 2 addresses need to be larger than the architecture's
463 #ifndef DWARF2_ADDR_SIZE
464 #define DWARF2_ADDR_SIZE ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)
467 /* The size in bytes of a DWARF field indicating an offset or length
468 relative to a debug info section, specified to be 4 bytes in the
469 DWARF-2 specification. The SGI/MIPS ABI defines it to be the same
471 #ifndef DWARF_OFFSET_SIZE
472 #define DWARF_OFFSET_SIZE 4
475 /* The size in bytes of a DWARF 4 type signature. */
476 #ifndef DWARF_TYPE_SIGNATURE_SIZE
477 #define DWARF_TYPE_SIGNATURE_SIZE 8
480 /* Default sizes for base C types. If the sizes are different for
481 your target, you should override these values by defining the
482 appropriate symbols in your tm.h file. */
484 #ifndef BITS_PER_WORD
485 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
488 #ifndef CHAR_TYPE_SIZE
489 #define CHAR_TYPE_SIZE BITS_PER_UNIT
492 #ifndef BOOL_TYPE_SIZE
493 /* `bool' has size and alignment `1', on almost all platforms. */
494 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
497 #ifndef SHORT_TYPE_SIZE
498 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
501 #ifndef INT_TYPE_SIZE
502 #define INT_TYPE_SIZE BITS_PER_WORD
505 #ifndef LONG_TYPE_SIZE
506 #define LONG_TYPE_SIZE BITS_PER_WORD
509 #ifndef LONG_LONG_TYPE_SIZE
510 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
513 #ifndef WCHAR_TYPE_SIZE
514 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
517 #ifndef FLOAT_TYPE_SIZE
518 #define FLOAT_TYPE_SIZE BITS_PER_WORD
521 #ifndef DOUBLE_TYPE_SIZE
522 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
525 #ifndef LONG_DOUBLE_TYPE_SIZE
526 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
529 #ifndef DECIMAL32_TYPE_SIZE
530 #define DECIMAL32_TYPE_SIZE 32
533 #ifndef DECIMAL64_TYPE_SIZE
534 #define DECIMAL64_TYPE_SIZE 64
537 #ifndef DECIMAL128_TYPE_SIZE
538 #define DECIMAL128_TYPE_SIZE 128
541 #ifndef SHORT_FRACT_TYPE_SIZE
542 #define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT
545 #ifndef FRACT_TYPE_SIZE
546 #define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2)
549 #ifndef LONG_FRACT_TYPE_SIZE
550 #define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4)
553 #ifndef LONG_LONG_FRACT_TYPE_SIZE
554 #define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8)
557 #ifndef SHORT_ACCUM_TYPE_SIZE
558 #define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2)
561 #ifndef ACCUM_TYPE_SIZE
562 #define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2)
565 #ifndef LONG_ACCUM_TYPE_SIZE
566 #define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2)
569 #ifndef LONG_LONG_ACCUM_TYPE_SIZE
570 #define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2)
573 /* We let tm.h override the types used here, to handle trivial differences
574 such as the choice of unsigned int or long unsigned int for size_t.
575 When machines start needing nontrivial differences in the size type,
576 it would be best to do something here to figure out automatically
577 from other information what type to use. */
580 #define SIZE_TYPE "long unsigned int"
584 #define SIZETYPE SIZE_TYPE
588 #define PID_TYPE "int"
591 /* If GCC knows the exact uint_least16_t and uint_least32_t types from
592 <stdint.h>, use them for char16_t and char32_t. Otherwise, use
593 these guesses; getting the wrong type of a given width will not
594 affect C++ name mangling because in C++ these are distinct types
598 #define CHAR8_TYPE "unsigned char"
601 #ifdef UINT_LEAST16_TYPE
602 #define CHAR16_TYPE UINT_LEAST16_TYPE
604 #define CHAR16_TYPE "short unsigned int"
607 #ifdef UINT_LEAST32_TYPE
608 #define CHAR32_TYPE UINT_LEAST32_TYPE
610 #define CHAR32_TYPE "unsigned int"
614 #define WCHAR_TYPE "int"
617 /* WCHAR_TYPE gets overridden by -fshort-wchar. */
618 #define MODIFIED_WCHAR_TYPE \
619 (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE)
622 #define PTRDIFF_TYPE "long int"
626 #define WINT_TYPE "unsigned int"
630 #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
632 : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
638 #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
640 : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
641 ? "long unsigned int" \
642 : "long long unsigned int"))
646 /* There are no default definitions of these <stdint.h> types. */
648 #ifndef SIG_ATOMIC_TYPE
649 #define SIG_ATOMIC_TYPE ((const char *) NULL)
653 #define INT8_TYPE ((const char *) NULL)
657 #define INT16_TYPE ((const char *) NULL)
661 #define INT32_TYPE ((const char *) NULL)
665 #define INT64_TYPE ((const char *) NULL)
669 #define UINT8_TYPE ((const char *) NULL)
673 #define UINT16_TYPE ((const char *) NULL)
677 #define UINT32_TYPE ((const char *) NULL)
681 #define UINT64_TYPE ((const char *) NULL)
684 #ifndef INT_LEAST8_TYPE
685 #define INT_LEAST8_TYPE ((const char *) NULL)
688 #ifndef INT_LEAST16_TYPE
689 #define INT_LEAST16_TYPE ((const char *) NULL)
692 #ifndef INT_LEAST32_TYPE
693 #define INT_LEAST32_TYPE ((const char *) NULL)
696 #ifndef INT_LEAST64_TYPE
697 #define INT_LEAST64_TYPE ((const char *) NULL)
700 #ifndef UINT_LEAST8_TYPE
701 #define UINT_LEAST8_TYPE ((const char *) NULL)
704 #ifndef UINT_LEAST16_TYPE
705 #define UINT_LEAST16_TYPE ((const char *) NULL)
708 #ifndef UINT_LEAST32_TYPE
709 #define UINT_LEAST32_TYPE ((const char *) NULL)
712 #ifndef UINT_LEAST64_TYPE
713 #define UINT_LEAST64_TYPE ((const char *) NULL)
716 #ifndef INT_FAST8_TYPE
717 #define INT_FAST8_TYPE ((const char *) NULL)
720 #ifndef INT_FAST16_TYPE
721 #define INT_FAST16_TYPE ((const char *) NULL)
724 #ifndef INT_FAST32_TYPE
725 #define INT_FAST32_TYPE ((const char *) NULL)
728 #ifndef INT_FAST64_TYPE
729 #define INT_FAST64_TYPE ((const char *) NULL)
732 #ifndef UINT_FAST8_TYPE
733 #define UINT_FAST8_TYPE ((const char *) NULL)
736 #ifndef UINT_FAST16_TYPE
737 #define UINT_FAST16_TYPE ((const char *) NULL)
740 #ifndef UINT_FAST32_TYPE
741 #define UINT_FAST32_TYPE ((const char *) NULL)
744 #ifndef UINT_FAST64_TYPE
745 #define UINT_FAST64_TYPE ((const char *) NULL)
749 #define INTPTR_TYPE ((const char *) NULL)
753 #define UINTPTR_TYPE ((const char *) NULL)
756 /* Width in bits of a pointer. Mind the value of the macro `Pmode'. */
758 #define POINTER_SIZE BITS_PER_WORD
760 #ifndef POINTER_SIZE_UNITS
761 #define POINTER_SIZE_UNITS ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)
765 #ifndef PIC_OFFSET_TABLE_REGNUM
766 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
769 #ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
770 #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 0
773 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
774 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
777 #ifndef TARGET_DECLSPEC
778 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
779 /* If the target supports the "dllimport" attribute, users are
780 probably used to the "__declspec" syntax. */
781 #define TARGET_DECLSPEC 1
783 #define TARGET_DECLSPEC 0
787 /* By default, the preprocessor should be invoked the same way in C++
789 #ifndef CPLUSPLUS_CPP_SPEC
791 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
795 #ifndef ACCUMULATE_OUTGOING_ARGS
796 #define ACCUMULATE_OUTGOING_ARGS 0
799 /* By default, use the GNU runtime for Objective C. */
800 #ifndef NEXT_OBJC_RUNTIME
801 #define NEXT_OBJC_RUNTIME 0
804 /* Decide whether a function's arguments should be processed
805 from first to last or from last to first.
807 They should if the stack and args grow in opposite directions, but
808 only if we have push insns. */
812 #ifndef PUSH_ARGS_REVERSED
813 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
814 #define PUSH_ARGS_REVERSED targetm.calls.push_argument (0)
820 #ifndef PUSH_ARGS_REVERSED
821 #define PUSH_ARGS_REVERSED 0
824 /* Default value for the alignment (in bits) a C conformant malloc has to
825 provide. This default is intended to be safe and always correct. */
826 #ifndef MALLOC_ABI_ALIGNMENT
827 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
830 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
831 STACK_BOUNDARY is required. */
832 #ifndef PREFERRED_STACK_BOUNDARY
833 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
836 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not
838 #ifndef INCOMING_STACK_BOUNDARY
839 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY
842 #ifndef TARGET_DEFAULT_PACK_STRUCT
843 #define TARGET_DEFAULT_PACK_STRUCT 0
846 /* By default, the vtable entries are void pointers, the so the alignment
847 is the same as pointer alignment. The value of this macro specifies
848 the alignment of the vtable entry in bits. It should be defined only
849 when special alignment is necessary. */
850 #ifndef TARGET_VTABLE_ENTRY_ALIGN
851 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
854 /* There are a few non-descriptor entries in the vtable at offsets below
855 zero. If these entries must be padded (say, to preserve the alignment
856 specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
857 words in each data entry. */
858 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
859 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
862 /* Decide whether it is safe to use a local alias for a virtual function
863 when constructing thunks. */
864 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
865 #ifdef ASM_OUTPUT_DEF
866 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
868 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
872 /* Decide whether target supports aliases. */
873 #ifndef TARGET_SUPPORTS_ALIASES
874 #ifdef ASM_OUTPUT_DEF
875 #define TARGET_SUPPORTS_ALIASES 1
877 #define TARGET_SUPPORTS_ALIASES 0
881 /* Select a format to encode pointers in exception handling data. We
882 prefer those that result in fewer dynamic relocations. Assume no
883 special support here and encode direct references. */
884 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
885 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) DW_EH_PE_absptr
888 /* By default, the C++ compiler will use the lowest bit of the pointer
889 to function to indicate a pointer-to-member-function points to a
890 virtual member function. However, if FUNCTION_BOUNDARY indicates
891 function addresses aren't always even, the lowest bit of the delta
892 field will be used. */
893 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
894 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
895 (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
896 ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
899 #ifndef DEFAULT_GDB_EXTENSIONS
900 #define DEFAULT_GDB_EXTENSIONS 1
903 /* If more than one debugging type is supported, you must define
904 PREFERRED_DEBUGGING_TYPE to choose the default. */
906 #if 1 < (defined (DBX_DEBUGGING_INFO) \
907 + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
908 + defined (VMS_DEBUGGING_INFO))
909 #ifndef PREFERRED_DEBUGGING_TYPE
910 #error You must define PREFERRED_DEBUGGING_TYPE
911 #endif /* no PREFERRED_DEBUGGING_TYPE */
913 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
914 here so other code needn't care. */
915 #elif defined DBX_DEBUGGING_INFO
916 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
918 #elif defined DWARF2_DEBUGGING_INFO || defined DWARF2_LINENO_DEBUGGING_INFO
919 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
921 #elif defined VMS_DEBUGGING_INFO
922 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
924 #elif defined XCOFF_DEBUGGING_INFO
925 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
928 /* No debugging format is supported by this target. */
929 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
932 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
933 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
936 /* True if the targets integer-comparison functions return { 0, 1, 2
937 } to indicate { <, ==, > }. False if { -1, 0, 1 } is used
938 instead. The libgcc routines are biased. */
939 #ifndef TARGET_LIB_INT_CMP_BIASED
940 #define TARGET_LIB_INT_CMP_BIASED (true)
943 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
944 then the word-endianness is the same as for integers. */
945 #ifndef FLOAT_WORDS_BIG_ENDIAN
946 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
949 #ifndef REG_WORDS_BIG_ENDIAN
950 #define REG_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
954 #ifndef TARGET_DEC_EVAL_METHOD
955 #define TARGET_DEC_EVAL_METHOD 2
958 #ifndef HAS_LONG_COND_BRANCH
959 #define HAS_LONG_COND_BRANCH 0
962 #ifndef HAS_LONG_UNCOND_BRANCH
963 #define HAS_LONG_UNCOND_BRANCH 0
966 /* Determine whether __cxa_atexit, rather than atexit, is used to
967 register C++ destructors for local statics and global objects. */
968 #ifndef DEFAULT_USE_CXA_ATEXIT
969 #define DEFAULT_USE_CXA_ATEXIT 0
972 #if GCC_VERSION >= 3000 && defined IN_GCC
973 /* These old constraint macros shouldn't appear anywhere in a
974 configuration using MD constraint definitions. */
977 /* Determin whether the target runtime library is Bionic */
978 #ifndef TARGET_HAS_BIONIC
979 #define TARGET_HAS_BIONIC 0
982 /* Indicate that CLZ and CTZ are undefined at zero. */
983 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
984 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
986 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
987 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
990 /* Provide a default value for STORE_FLAG_VALUE. */
991 #ifndef STORE_FLAG_VALUE
992 #define STORE_FLAG_VALUE 1
995 /* This macro is used to determine what the largest unit size that
996 move_by_pieces can use is. */
998 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
999 move efficiently, as opposed to MOVE_MAX which is the maximum
1000 number of bytes we can move with a single instruction. */
1002 #ifndef MOVE_MAX_PIECES
1003 #define MOVE_MAX_PIECES MOVE_MAX
1006 /* STORE_MAX_PIECES is the number of bytes at a time that we can
1007 store efficiently. Due to internal GCC limitations, this is
1008 MOVE_MAX_PIECES limited by the number of bytes GCC can represent
1009 for an immediate constant. */
1011 #ifndef STORE_MAX_PIECES
1012 #define STORE_MAX_PIECES MIN (MOVE_MAX_PIECES, 2 * sizeof (HOST_WIDE_INT))
1015 /* Likewise for block comparisons. */
1016 #ifndef COMPARE_MAX_PIECES
1017 #define COMPARE_MAX_PIECES MOVE_MAX_PIECES
1020 #ifndef MAX_MOVE_MAX
1021 #define MAX_MOVE_MAX MOVE_MAX
1024 #ifndef MIN_UNITS_PER_WORD
1025 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
1028 #ifndef MAX_BITS_PER_WORD
1029 #define MAX_BITS_PER_WORD BITS_PER_WORD
1032 #ifndef STACK_POINTER_OFFSET
1033 #define STACK_POINTER_OFFSET 0
1037 #define LOCAL_REGNO(REGNO) 0
1040 #ifndef HONOR_REG_ALLOC_ORDER
1041 #define HONOR_REG_ALLOC_ORDER 0
1044 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1045 the stack pointer does not matter. The value is tested only in
1046 functions that have frame pointers. */
1047 #ifndef EXIT_IGNORE_STACK
1048 #define EXIT_IGNORE_STACK 0
1051 /* Assume that case vectors are not pc-relative. */
1052 #ifndef CASE_VECTOR_PC_RELATIVE
1053 #define CASE_VECTOR_PC_RELATIVE 0
1056 /* Force minimum alignment to be able to use the least significant bits
1057 for distinguishing descriptor addresses from code addresses. */
1058 #define FUNCTION_ALIGNMENT(ALIGN) \
1059 (lang_hooks.custom_function_descriptors \
1060 && targetm.calls.custom_function_descriptors > 0 \
1062 2 * targetm.calls.custom_function_descriptors * BITS_PER_UNIT)\
1065 /* Assume that trampolines need function alignment. */
1066 #ifndef TRAMPOLINE_ALIGNMENT
1067 #define TRAMPOLINE_ALIGNMENT FUNCTION_ALIGNMENT (FUNCTION_BOUNDARY)
1070 /* Register mappings for target machines without register windows. */
1071 #ifndef INCOMING_REGNO
1072 #define INCOMING_REGNO(N) (N)
1075 #ifndef OUTGOING_REGNO
1076 #define OUTGOING_REGNO(N) (N)
1079 #ifndef SHIFT_COUNT_TRUNCATED
1080 #define SHIFT_COUNT_TRUNCATED 0
1083 #ifndef LEGITIMATE_PIC_OPERAND_P
1084 #define LEGITIMATE_PIC_OPERAND_P(X) 1
1087 #ifndef TARGET_MEM_CONSTRAINT
1088 #define TARGET_MEM_CONSTRAINT 'm'
1091 #ifndef REVERSIBLE_CC_MODE
1092 #define REVERSIBLE_CC_MODE(MODE) 0
1095 /* Biggest alignment supported by the object file format of this machine. */
1096 #ifndef MAX_OFILE_ALIGNMENT
1097 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
1100 #ifndef FRAME_GROWS_DOWNWARD
1101 #define FRAME_GROWS_DOWNWARD 0
1104 #ifndef RETURN_ADDR_IN_PREVIOUS_FRAME
1105 #define RETURN_ADDR_IN_PREVIOUS_FRAME 0
1108 /* On most machines, the CFA coincides with the first incoming parm. */
1109 #ifndef ARG_POINTER_CFA_OFFSET
1110 #define ARG_POINTER_CFA_OFFSET(FNDECL) \
1111 (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
1114 /* On most machines, we use the CFA as DW_AT_frame_base. */
1115 #ifndef CFA_FRAME_BASE_OFFSET
1116 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0
1119 /* The offset from the incoming value of %sp to the top of the stack frame
1120 for the current function. */
1121 #ifndef INCOMING_FRAME_SP_OFFSET
1122 #define INCOMING_FRAME_SP_OFFSET 0
1125 #ifndef HARD_REGNO_NREGS_HAS_PADDING
1126 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
1127 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
1130 #ifndef OUTGOING_REG_PARM_STACK_SPACE
1131 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
1134 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
1135 the backend. MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
1136 effort stack alignment supported by the backend. If the backend
1137 supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
1138 MAX_STACK_ALIGNMENT are the same. Otherwise, the incoming stack
1139 boundary will limit the maximum guaranteed stack alignment. */
1140 #ifdef MAX_STACK_ALIGNMENT
1141 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
1143 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY
1144 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
1147 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
1149 #ifndef LOCAL_ALIGNMENT
1150 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
1153 #ifndef STACK_SLOT_ALIGNMENT
1154 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
1155 ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
1158 #ifndef LOCAL_DECL_ALIGNMENT
1159 #define LOCAL_DECL_ALIGNMENT(DECL) \
1160 LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
1163 #ifndef MINIMUM_ALIGNMENT
1164 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN)
1167 /* Alignment value for attribute ((aligned)). */
1168 #ifndef ATTRIBUTE_ALIGNED_VALUE
1169 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
1172 /* For most ports anything that evaluates to a constant symbolic
1173 or integer value is acceptable as a constant address. */
1174 #ifndef CONSTANT_ADDRESS_P
1175 #define CONSTANT_ADDRESS_P(X) (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE)
1178 #ifndef MAX_FIXED_MODE_SIZE
1179 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
1182 /* Nonzero if structures and unions should be returned in memory.
1184 This should only be defined if compatibility with another compiler or
1185 with an ABI is needed, because it results in slower code. */
1187 #ifndef DEFAULT_PCC_STRUCT_RETURN
1188 #define DEFAULT_PCC_STRUCT_RETURN 1
1191 #ifndef PCC_BITFIELD_TYPE_MATTERS
1192 #define PCC_BITFIELD_TYPE_MATTERS false
1195 #ifndef INSN_SETS_ARE_DELAYED
1196 #define INSN_SETS_ARE_DELAYED(INSN) false
1199 #ifndef INSN_REFERENCES_ARE_DELAYED
1200 #define INSN_REFERENCES_ARE_DELAYED(INSN) false
1203 #ifndef NO_FUNCTION_CSE
1204 #define NO_FUNCTION_CSE false
1207 #ifndef HARD_REGNO_RENAME_OK
1208 #define HARD_REGNO_RENAME_OK(FROM, TO) true
1211 #ifndef EPILOGUE_USES
1212 #define EPILOGUE_USES(REG) false
1215 #ifndef ARGS_GROW_DOWNWARD
1216 #define ARGS_GROW_DOWNWARD 0
1219 #ifndef STACK_GROWS_DOWNWARD
1220 #define STACK_GROWS_DOWNWARD 0
1223 #ifndef STACK_PUSH_CODE
1224 #if STACK_GROWS_DOWNWARD
1225 #define STACK_PUSH_CODE PRE_DEC
1227 #define STACK_PUSH_CODE PRE_INC
1231 /* Default value for flag_pie when flag_pie is initialized to -1:
1232 --enable-default-pie: Default flag_pie to -fPIE.
1233 --disable-default-pie: Default flag_pie to 0.
1235 #ifdef ENABLE_DEFAULT_PIE
1236 # ifndef DEFAULT_FLAG_PIE
1237 # define DEFAULT_FLAG_PIE 2
1240 # define DEFAULT_FLAG_PIE 0
1243 #ifndef SWITCHABLE_TARGET
1244 #define SWITCHABLE_TARGET 0
1247 /* If the target supports integers that are wider than two
1248 HOST_WIDE_INTs on the host compiler, then the target should define
1249 TARGET_SUPPORTS_WIDE_INT and make the appropriate fixups.
1250 Otherwise the compiler really is not robust. */
1251 #ifndef TARGET_SUPPORTS_WIDE_INT
1252 #define TARGET_SUPPORTS_WIDE_INT 0
1255 #ifndef SHORT_IMMEDIATES_SIGN_EXTEND
1256 #define SHORT_IMMEDIATES_SIGN_EXTEND 0
1259 #ifndef WORD_REGISTER_OPERATIONS
1260 #define WORD_REGISTER_OPERATIONS 0
1263 #ifndef LOAD_EXTEND_OP
1264 #define LOAD_EXTEND_OP(M) UNKNOWN
1267 #ifndef INITIAL_FRAME_ADDRESS_RTX
1268 #define INITIAL_FRAME_ADDRESS_RTX NULL
1271 #ifndef SETUP_FRAME_ADDRESSES
1272 #define SETUP_FRAME_ADDRESSES() do { } while (0)
1275 #ifndef DYNAMIC_CHAIN_ADDRESS
1276 #define DYNAMIC_CHAIN_ADDRESS(x) (x)
1279 #ifndef FRAME_ADDR_RTX
1280 #define FRAME_ADDR_RTX(x) (x)
1283 #ifndef REVERSE_CONDITION
1284 #define REVERSE_CONDITION(code, mode) reverse_condition (code)
1287 #ifndef TARGET_PECOFF
1288 #define TARGET_PECOFF 0
1292 #define TARGET_COFF 0
1295 #ifndef EH_RETURN_HANDLER_RTX
1296 #define EH_RETURN_HANDLER_RTX NULL
1299 #ifdef GCC_INSN_FLAGS_H
1300 /* Dependent default target macro definitions
1302 This section of defaults.h defines target macros that depend on generated
1303 headers. This is a bit awkward: We want to put all default definitions
1304 for target macros in defaults.h, but some of the defaults depend on the
1305 HAVE_* flags defines of insn-flags.h. But insn-flags.h is not always
1306 included by files that do include defaults.h.
1308 Fortunately, the default macro definitions that depend on the HAVE_*
1309 macros are also the ones that will only be used inside GCC itself, i.e.
1310 not in the gen* programs or in target objects like libgcc.
1312 Obviously, it would be best to keep this section of defaults.h as small
1313 as possible, by converting the macros defined below to target hooks or
1317 /* The default branch cost is 1. */
1319 #define BRANCH_COST(speed_p, predictable_p) 1
1322 /* If a memory-to-memory move would take MOVE_RATIO or more simple
1323 move-instruction sequences, we will do a cpymem or libcall instead. */
1326 #if defined (HAVE_cpymemqi) || defined (HAVE_cpymemhi) || defined (HAVE_cpymemsi) || defined (HAVE_cpymemdi) || defined (HAVE_cpymemti)
1327 #define MOVE_RATIO(speed) 2
1329 /* If we are optimizing for space (-Os), cut down the default move ratio. */
1330 #define MOVE_RATIO(speed) ((speed) ? 15 : 3)
1334 /* If a clear memory operation would take CLEAR_RATIO or more simple
1335 move-instruction sequences, we will do a setmem or libcall instead. */
1338 #if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
1339 #define CLEAR_RATIO(speed) 2
1341 /* If we are optimizing for space, cut down the default clear ratio. */
1342 #define CLEAR_RATIO(speed) ((speed) ? 15 :3)
1346 /* If a memory set (to value other than zero) operation would take
1347 SET_RATIO or more simple move-instruction sequences, we will do a setmem
1348 or libcall instead. */
1350 #define SET_RATIO(speed) MOVE_RATIO (speed)
1353 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
1354 Normally move_insn, so Pmode stack pointer. */
1356 #ifndef STACK_SAVEAREA_MODE
1357 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
1360 /* Supply a default definition of STACK_SIZE_MODE for
1361 allocate_dynamic_stack_space. Normally PLUS/MINUS, so word_mode. */
1363 #ifndef STACK_SIZE_MODE
1364 #define STACK_SIZE_MODE word_mode
1367 /* Default value for flag_stack_protect when flag_stack_protect is initialized to -1:
1368 --enable-default-ssp: Default flag_stack_protect to -fstack-protector-strong.
1369 --disable-default-ssp: Default flag_stack_protect to 0.
1371 #ifdef ENABLE_DEFAULT_SSP
1372 # ifndef DEFAULT_FLAG_SSP
1373 # define DEFAULT_FLAG_SSP 3
1376 # define DEFAULT_FLAG_SSP 0
1379 /* Provide default values for the macros controlling stack checking. */
1381 /* The default is neither full builtin stack checking... */
1382 #ifndef STACK_CHECK_BUILTIN
1383 #define STACK_CHECK_BUILTIN 0
1386 /* ...nor static builtin stack checking. */
1387 #ifndef STACK_CHECK_STATIC_BUILTIN
1388 #define STACK_CHECK_STATIC_BUILTIN 0
1391 /* The default interval is one page (4096 bytes). */
1392 #ifndef STACK_CHECK_PROBE_INTERVAL_EXP
1393 #define STACK_CHECK_PROBE_INTERVAL_EXP 12
1396 /* The default is not to move the stack pointer. */
1397 #ifndef STACK_CHECK_MOVING_SP
1398 #define STACK_CHECK_MOVING_SP 0
1401 /* This is a kludge to try to capture the discrepancy between the old
1402 mechanism (generic stack checking) and the new mechanism (static
1403 builtin stack checking). STACK_CHECK_PROTECT needs to be bumped
1404 for the latter because part of the protection area is effectively
1405 included in STACK_CHECK_MAX_FRAME_SIZE for the former. */
1406 #ifdef STACK_CHECK_PROTECT
1407 #define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
1409 #define STACK_OLD_CHECK_PROTECT \
1410 (!global_options.x_flag_exceptions \
1411 ? 75 * UNITS_PER_WORD \
1412 : targetm_common.except_unwind_info (&global_options) == UI_SJLJ \
1417 /* Minimum amount of stack required to recover from an anticipated stack
1418 overflow detection. The default value conveys an estimate of the amount
1419 of stack required to propagate an exception. */
1420 #ifndef STACK_CHECK_PROTECT
1421 #define STACK_CHECK_PROTECT \
1422 (!global_options.x_flag_exceptions \
1424 : targetm_common.except_unwind_info (&global_options) == UI_SJLJ \
1429 /* Make the maximum frame size be the largest we can and still only need
1430 one probe per function. */
1431 #ifndef STACK_CHECK_MAX_FRAME_SIZE
1432 #define STACK_CHECK_MAX_FRAME_SIZE \
1433 ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD)
1436 /* This is arbitrary, but should be large enough everywhere. */
1437 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
1438 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
1441 /* Provide a reasonable default for the maximum size of an object to
1442 allocate in the fixed frame. We may need to be able to make this
1443 controllable by the user at some point. */
1444 #ifndef STACK_CHECK_MAX_VAR_SIZE
1445 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
1448 /* By default, the C++ compiler will use function addresses in the
1449 vtable entries. Setting this nonzero tells the compiler to use
1450 function descriptors instead. The value of this macro says how
1451 many words wide the descriptor is (normally 2). It is assumed
1452 that the address of a function descriptor may be treated as a
1453 pointer to a function. */
1454 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
1455 #define TARGET_VTABLE_USES_DESCRIPTORS 0
1458 #endif /* GCC_INSN_FLAGS_H */
1460 #ifndef DWARF_GNAT_ENCODINGS_DEFAULT
1461 #define DWARF_GNAT_ENCODINGS_DEFAULT DWARF_GNAT_ENCODINGS_GDB
1464 #ifndef USED_FOR_TARGET
1465 /* Done this way to keep gengtype happy. */
1466 #if BITS_PER_UNIT == 8
1467 #define TARGET_UNIT uint8_t
1468 #elif BITS_PER_UNIT == 16
1469 #define TARGET_UNIT uint16_t
1470 #elif BITS_PER_UNIT == 32
1471 #define TARGET_UNIT uint32_t
1473 #error Unknown BITS_PER_UNIT
1475 typedef TARGET_UNIT target_unit
;
1478 #endif /* ! GCC_DEFAULTS_H */