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ea36a3dd 1/* Definitions of various defaults for tm.h macros.
fbd26352 2 Copyright (C) 1992-2019 Free Software Foundation, Inc.
77b413c0 3 Contributed by Ron Guilmette (rfg@monkeys.com)
99803b25 4
f12b58b3 5This file is part of GCC.
99803b25 6
f12b58b3 7GCC is free software; you can redistribute it and/or modify it under
8the terms of the GNU General Public License as published by the Free
8c4c00c1 9Software Foundation; either version 3, or (at your option) any later
f12b58b3 10version.
99803b25 11
f12b58b3 12GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13WARRANTY; without even the implied warranty of MERCHANTABILITY or
14FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15for more details.
99803b25 16
6bc9506f 17Under Section 7 of GPL version 3, you are granted additional
18permissions described in the GCC Runtime Library Exception, version
193.1, as published by the Free Software Foundation.
20
21You should have received a copy of the GNU General Public License and
22a copy of the GCC Runtime Library Exception along with this program;
23see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
8c4c00c1 24<http://www.gnu.org/licenses/>. */
99803b25 25
0e66aa75 26#ifndef GCC_DEFAULTS_H
27#define GCC_DEFAULTS_H
28
2d0a9e44 29/* How to start an assembler comment. */
30#ifndef ASM_COMMENT_START
31#define ASM_COMMENT_START ";#"
32#endif
33
805e22b2 34/* Store in OUTPUT a string (made with alloca) containing an
35 assembler-name for a local static variable or function named NAME.
b441e6f1 36 LABELNO is an integer which is different for each call. */
37
805e22b2 38#ifndef ASM_PN_FORMAT
39# ifndef NO_DOT_IN_LABEL
40# define ASM_PN_FORMAT "%s.%lu"
41# else
42# ifndef NO_DOLLAR_IN_LABEL
43# define ASM_PN_FORMAT "%s$%lu"
44# else
45# define ASM_PN_FORMAT "__%s_%lu"
46# endif
47# endif
48#endif /* ! ASM_PN_FORMAT */
49
b441e6f1 50#ifndef ASM_FORMAT_PRIVATE_NAME
805e22b2 51# define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
52 do { const char *const name_ = (NAME); \
4fd61bc6 53 char *const output_ = (OUTPUT) = \
54 (char *) alloca (strlen (name_) + 32); \
805e22b2 55 sprintf (output_, ASM_PN_FORMAT, name_, (unsigned long)(LABELNO)); \
b441e6f1 56 } while (0)
57#endif
58
21dda4ee 59/* Choose a reasonable default for ASM_OUTPUT_ASCII. */
99803b25 60
61#ifndef ASM_OUTPUT_ASCII
62#define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
63 do { \
64 FILE *_hide_asm_out_file = (MYFILE); \
a61deedf 65 const unsigned char *_hide_p = (const unsigned char *) (MYSTRING); \
99803b25 66 int _hide_thissize = (MYLENGTH); \
67 { \
68 FILE *asm_out_file = _hide_asm_out_file; \
a61deedf 69 const unsigned char *p = _hide_p; \
99803b25 70 int thissize = _hide_thissize; \
71 int i; \
72 fprintf (asm_out_file, "\t.ascii \""); \
73 \
74 for (i = 0; i < thissize; i++) \
75 { \
19cb6b50 76 int c = p[i]; \
99803b25 77 if (c == '\"' || c == '\\') \
78 putc ('\\', asm_out_file); \
9af5ce0c 79 if (ISPRINT (c)) \
99803b25 80 putc (c, asm_out_file); \
81 else \
82 { \
83 fprintf (asm_out_file, "\\%o", c); \
84 /* After an octal-escape, if a digit follows, \
85 terminate one string constant and start another. \
6c842310 86 The VAX assembler fails to stop reading the escape \
99803b25 87 after three digits, so this is the only way we \
88 can get it to parse the data properly. */ \
9af5ce0c 89 if (i < thissize - 1 && ISDIGIT (p[i + 1])) \
99803b25 90 fprintf (asm_out_file, "\"\n\t.ascii \""); \
91 } \
92 } \
93 fprintf (asm_out_file, "\"\n"); \
94 } \
95 } \
96 while (0)
97#endif
b4534d9a 98
bd81c5c3 99/* This is how we tell the assembler to equate two values. */
100#ifdef SET_ASM_OP
101#ifndef ASM_OUTPUT_DEF
102#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
17d8e118 103 do { fprintf ((FILE), "%s", SET_ASM_OP); \
bd81c5c3 104 assemble_name (FILE, LABEL1); \
105 fprintf (FILE, ","); \
106 assemble_name (FILE, LABEL2); \
107 fprintf (FILE, "\n"); \
108 } while (0)
109#endif
110#endif
9a0ce7db 111
85c0a25c 112#ifndef IFUNC_ASM_TYPE
113#define IFUNC_ASM_TYPE "gnu_indirect_function"
114#endif
115
7d070520 116#ifndef TLS_COMMON_ASM_OP
117#define TLS_COMMON_ASM_OP ".tls_common"
118#endif
119
6968d8fb 120#if defined (HAVE_AS_TLS) && !defined (ASM_OUTPUT_TLS_COMMON)
121#define ASM_OUTPUT_TLS_COMMON(FILE, DECL, NAME, SIZE) \
122 do \
123 { \
7d070520 124 fprintf ((FILE), "\t%s\t", TLS_COMMON_ASM_OP); \
6968d8fb 125 assemble_name ((FILE), (NAME)); \
f03df321 126 fprintf ((FILE), "," HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", \
6968d8fb 127 (SIZE), DECL_ALIGN (DECL) / BITS_PER_UNIT); \
128 } \
129 while (0)
130#endif
131
137900fa 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
136#endif
137
9bf98a09 138/* This is how to output the definition of a user-level label named
2761b7cb 139 NAME, such as the label on variable NAME. */
9bf98a09 140
141#ifndef ASM_OUTPUT_LABEL
142#define ASM_OUTPUT_LABEL(FILE,NAME) \
c0e76f1f 143 do { \
144 assemble_name ((FILE), (NAME)); \
145 fputs (":\n", (FILE)); \
146 } while (0)
9bf98a09 147#endif
148
2761b7cb 149/* This is how to output the definition of a user-level label named
150 NAME, such as the label on a function. */
151
152#ifndef ASM_OUTPUT_FUNCTION_LABEL
153#define ASM_OUTPUT_FUNCTION_LABEL(FILE, NAME, DECL) \
154 ASM_OUTPUT_LABEL ((FILE), (NAME))
155#endif
156
48126f0c 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) \
160 do { \
161 assemble_name_raw ((FILE), (NAME)); \
162 fputs (":\n", (FILE)); \
163 } while (0)
164#endif
165
afd6e1ea 166/* This is how to output a reference to a user-level label named NAME. */
167
168#ifndef ASM_OUTPUT_LABELREF
c0e76f1f 169#define ASM_OUTPUT_LABELREF(FILE,NAME) \
170 do { \
171 fputs (user_label_prefix, (FILE)); \
172 fputs ((NAME), (FILE)); \
66659825 173 } while (0)
afd6e1ea 174#endif
175
64e17633 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. */
179
180#ifndef ASM_OUTPUT_DEBUG_LABEL
181#define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
805e22b2 182 (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM)
64e17633 183#endif
184
3285e530 185/* This is how we tell the assembler that a symbol is weak. */
0074c35b 186#ifndef ASM_OUTPUT_WEAK_ALIAS
187#if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
3285e530 188#define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE) \
189 do \
190 { \
191 ASM_WEAKEN_LABEL (STREAM, NAME); \
192 if (VALUE) \
193 ASM_OUTPUT_DEF (STREAM, NAME, VALUE); \
194 } \
195 while (0)
f4a30bd7 196#endif
197#endif
198
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
b0988db1 207#define ASM_OUTPUT_WEAKREF(FILE, DECL, NAME, VALUE) \
f4a30bd7 208 do \
209 { \
210 fprintf ((FILE), "\t.weakref\t"); \
211 assemble_name ((FILE), (NAME)); \
212 fprintf ((FILE), ","); \
213 assemble_name ((FILE), (VALUE)); \
214 fprintf ((FILE), "\n"); \
215 } \
216 while (0)
3285e530 217#endif
0074c35b 218#endif
3285e530 219
ef7af4c3 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) \
224 do \
225 { \
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); \
231 } \
232 while (0)
233#endif
234#endif
235
236/* How to emit a .size directive. */
237#ifndef ASM_OUTPUT_SIZE_DIRECTIVE
238#ifdef SIZE_ASM_OP
239#define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE) \
240 do \
241 { \
242 HOST_WIDE_INT size_ = (SIZE); \
243 fputs (SIZE_ASM_OP, STREAM); \
244 assemble_name (STREAM, NAME); \
85aa12f7 245 fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \
ef7af4c3 246 } \
247 while (0)
248
a7424888 249#define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME) \
ef7af4c3 250 do \
251 { \
252 fputs (SIZE_ASM_OP, STREAM); \
a7424888 253 assemble_name (STREAM, NAME); \
254 fputs (", .-", STREAM); \
255 assemble_name (STREAM, NAME); \
ef7af4c3 256 putc ('\n', STREAM); \
257 } \
258 while (0)
259
260#endif
261#endif
262
293c8430 263/* This determines whether or not we support weak symbols. SUPPORTS_WEAK
264 must be a preprocessor constant. */
9a0ce7db 265#ifndef SUPPORTS_WEAK
ee0125fb 266#if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
9a0ce7db 267#define SUPPORTS_WEAK 1
268#else
269#define SUPPORTS_WEAK 0
270#endif
271#endif
19bce576 272
293c8430 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)
277#endif
278
1488fe24 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
284#else
285#define SUPPORTS_DISCRIMINATOR 0
286#endif
287#endif
288
21419a5e 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
293#else
294#define SUPPORTS_ONE_ONLY 0
295#endif
296#endif
297
9bb1c6fd 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;
fbf0afd1 302 see the documentation. */
9bb1c6fd 303#ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
304#define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
2f9fc8ef 305#endif
306
778ac06a 307/* This determines whether or not we need linkonce unwind information. */
2f9fc8ef 308#ifndef TARGET_USES_WEAK_UNWIND_INFO
309#define TARGET_USES_WEAK_UNWIND_INFO 0
310#endif
311
226e4024 312/* By default, there is no prefix on user-defined symbols. */
313#ifndef USER_LABEL_PREFIX
314#define USER_LABEL_PREFIX ""
315#endif
316
ee055d40 317/* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
9e7454d0 318 provide a weak attribute. Else define it to nothing.
ee055d40 319
673b6e5a 320 This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
ee055d40 321 not available at that time.
322
323 Note, this is only for use by target files which we know are to be
324 compiled by GCC. */
325#ifndef TARGET_ATTRIBUTE_WEAK
326# if SUPPORTS_WEAK
327# define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
328# else
329# define TARGET_ATTRIBUTE_WEAK
330# endif
331#endif
332
197e583a 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
337#endif
2f9fc8ef 338
246dd815 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 */
344
19bce576 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. */
cc7d6aed 347#if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
d757b8c9 348#define DWARF2_UNWIND_INFO 1
19bce576 349#endif
189c9752 350
01d15dc5 351/* If we have named sections, and we're using crtstuff to run ctors,
352 use them for registering eh frame information. */
5908b37c 353#if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
552a60d3 354 && !defined (EH_FRAME_THROUGH_COLLECT2)
2cb4ac60 355#ifndef EH_FRAME_SECTION_NAME
356#define EH_FRAME_SECTION_NAME ".eh_frame"
357#endif
a6881cf3 358#endif
359
51601538 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
375#else
376#define EH_TABLES_CAN_BE_READ_ONLY 0
377#endif
378#endif
379
0973afac 380/* Provide defaults for stuff that may not be defined when using
381 sjlj exceptions. */
382#ifndef EH_RETURN_DATA_REGNO
383#define EH_RETURN_DATA_REGNO(N) INVALID_REGNUM
384#endif
385
5d3b61f6 386/* Offset between the eh handler address and entry in eh tables. */
387#ifndef RETURN_ADDR_OFFSET
388#define RETURN_ADDR_OFFSET 0
389#endif
390
f564fb30 391#ifndef MASK_RETURN_ADDR
392#define MASK_RETURN_ADDR NULL_RTX
393#endif
394
de2f3039 395/* Number of hardware registers that go into the DWARF-2 unwind info.
396 If not defined, equals FIRST_PSEUDO_REGISTER */
397
398#ifndef DWARF_FRAME_REGISTERS
399#define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
400#endif
0e66aa75 401
53a3f6d1 402/* Offsets recorded in opcodes are a multiple of this alignment factor. */
403#ifndef DWARF_CIE_DATA_ALIGNMENT
404#ifdef STACK_GROWS_DOWNWARD
405#define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD))
406#else
407#define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD)
408#endif
409#endif
410
411/* The DWARF 2 CFA column which tracks the return address. Normally this
412 is the column for PC, or the first column after all of the hard
413 registers. */
414#ifndef DWARF_FRAME_RETURN_COLUMN
415#ifdef PC_REGNUM
416#define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM)
417#else
418#define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGISTERS
419#endif
420#endif
421
1ff6063a 422/* How to renumber registers for dbx and gdb. If not defined, assume
423 no renumbering is necessary. */
424
425#ifndef DBX_REGISTER_NUMBER
426#define DBX_REGISTER_NUMBER(REGNO) (REGNO)
427#endif
428
53a3f6d1 429/* The mapping from gcc register number to DWARF 2 CFA column number.
430 By default, we just provide columns for all registers. */
431#ifndef DWARF_FRAME_REGNUM
432#define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
433#endif
434
c0235a33 435/* The mapping from dwarf CFA reg number to internal dwarf reg numbers. */
436#ifndef DWARF_REG_TO_UNWIND_COLUMN
437#define DWARF_REG_TO_UNWIND_COLUMN(REGNO) (REGNO)
438#endif
439
53a3f6d1 440/* Map register numbers held in the call frame info that gcc has
441 collected using DWARF_FRAME_REGNUM to those that should be output in
442 .debug_frame and .eh_frame. */
443#ifndef DWARF2_FRAME_REG_OUT
444#define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) (REGNO)
445#endif
446
04dfc41a 447/* The size of addresses as they appear in the Dwarf 2 data.
448 Some architectures use word addresses to refer to code locations,
449 but Dwarf 2 info always uses byte addresses. On such machines,
450 Dwarf 2 addresses need to be larger than the architecture's
451 pointers. */
452#ifndef DWARF2_ADDR_SIZE
4765975c 453#define DWARF2_ADDR_SIZE ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)
04dfc41a 454#endif
455
456/* The size in bytes of a DWARF field indicating an offset or length
457 relative to a debug info section, specified to be 4 bytes in the
458 DWARF-2 specification. The SGI/MIPS ABI defines it to be the same
459 as PTR_SIZE. */
460#ifndef DWARF_OFFSET_SIZE
461#define DWARF_OFFSET_SIZE 4
462#endif
463
464/* The size in bytes of a DWARF 4 type signature. */
465#ifndef DWARF_TYPE_SIGNATURE_SIZE
466#define DWARF_TYPE_SIGNATURE_SIZE 8
467#endif
468
0e66aa75 469/* Default sizes for base C types. If the sizes are different for
470 your target, you should override these values by defining the
471 appropriate symbols in your tm.h file. */
472
6852ad78 473#ifndef BITS_PER_WORD
474#define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
475#endif
476
0e66aa75 477#ifndef CHAR_TYPE_SIZE
478#define CHAR_TYPE_SIZE BITS_PER_UNIT
479#endif
480
557840a9 481#ifndef BOOL_TYPE_SIZE
482/* `bool' has size and alignment `1', on almost all platforms. */
483#define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
484#endif
485
0e66aa75 486#ifndef SHORT_TYPE_SIZE
487#define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
488#endif
489
490#ifndef INT_TYPE_SIZE
491#define INT_TYPE_SIZE BITS_PER_WORD
492#endif
493
494#ifndef LONG_TYPE_SIZE
495#define LONG_TYPE_SIZE BITS_PER_WORD
496#endif
497
498#ifndef LONG_LONG_TYPE_SIZE
499#define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
500#endif
501
502#ifndef WCHAR_TYPE_SIZE
503#define WCHAR_TYPE_SIZE INT_TYPE_SIZE
504#endif
505
0e66aa75 506#ifndef FLOAT_TYPE_SIZE
507#define FLOAT_TYPE_SIZE BITS_PER_WORD
508#endif
509
510#ifndef DOUBLE_TYPE_SIZE
511#define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
512#endif
513
514#ifndef LONG_DOUBLE_TYPE_SIZE
515#define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
516#endif
517
c4503c0a 518#ifndef DECIMAL32_TYPE_SIZE
519#define DECIMAL32_TYPE_SIZE 32
48e1416a 520#endif
c4503c0a 521
48e1416a 522#ifndef DECIMAL64_TYPE_SIZE
c4503c0a 523#define DECIMAL64_TYPE_SIZE 64
48e1416a 524#endif
c4503c0a 525
526#ifndef DECIMAL128_TYPE_SIZE
527#define DECIMAL128_TYPE_SIZE 128
528#endif
529
06f0b99c 530#ifndef SHORT_FRACT_TYPE_SIZE
531#define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT
532#endif
533
534#ifndef FRACT_TYPE_SIZE
535#define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2)
536#endif
537
538#ifndef LONG_FRACT_TYPE_SIZE
539#define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4)
540#endif
541
542#ifndef LONG_LONG_FRACT_TYPE_SIZE
543#define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8)
544#endif
545
546#ifndef SHORT_ACCUM_TYPE_SIZE
547#define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2)
548#endif
549
550#ifndef ACCUM_TYPE_SIZE
551#define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2)
552#endif
553
554#ifndef LONG_ACCUM_TYPE_SIZE
555#define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2)
556#endif
557
558#ifndef LONG_LONG_ACCUM_TYPE_SIZE
559#define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2)
560#endif
561
b0b1cbb9 562/* We let tm.h override the types used here, to handle trivial differences
563 such as the choice of unsigned int or long unsigned int for size_t.
564 When machines start needing nontrivial differences in the size type,
565 it would be best to do something here to figure out automatically
566 from other information what type to use. */
567
568#ifndef SIZE_TYPE
569#define SIZE_TYPE "long unsigned int"
570#endif
571
748e5d45 572#ifndef SIZETYPE
573#define SIZETYPE SIZE_TYPE
574#endif
575
b0b1cbb9 576#ifndef PID_TYPE
577#define PID_TYPE "int"
578#endif
579
580/* If GCC knows the exact uint_least16_t and uint_least32_t types from
581 <stdint.h>, use them for char16_t and char32_t. Otherwise, use
582 these guesses; getting the wrong type of a given width will not
583 affect C++ name mangling because in C++ these are distinct types
584 not typedefs. */
585
82362779 586#ifndef CHAR8_TYPE
587#define CHAR8_TYPE "unsigned char"
588#endif
589
b0b1cbb9 590#ifdef UINT_LEAST16_TYPE
591#define CHAR16_TYPE UINT_LEAST16_TYPE
592#else
593#define CHAR16_TYPE "short unsigned int"
594#endif
595
596#ifdef UINT_LEAST32_TYPE
597#define CHAR32_TYPE UINT_LEAST32_TYPE
598#else
599#define CHAR32_TYPE "unsigned int"
600#endif
601
602#ifndef WCHAR_TYPE
603#define WCHAR_TYPE "int"
604#endif
605
606/* WCHAR_TYPE gets overridden by -fshort-wchar. */
607#define MODIFIED_WCHAR_TYPE \
608 (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE)
609
610#ifndef PTRDIFF_TYPE
611#define PTRDIFF_TYPE "long int"
612#endif
613
614#ifndef WINT_TYPE
615#define WINT_TYPE "unsigned int"
616#endif
617
618#ifndef INTMAX_TYPE
619#define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
620 ? "int" \
621 : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
622 ? "long int" \
623 : "long long int"))
624#endif
625
626#ifndef UINTMAX_TYPE
627#define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
628 ? "unsigned int" \
629 : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
630 ? "long unsigned int" \
631 : "long long unsigned int"))
632#endif
633
634
635/* There are no default definitions of these <stdint.h> types. */
636
637#ifndef SIG_ATOMIC_TYPE
638#define SIG_ATOMIC_TYPE ((const char *) NULL)
639#endif
640
641#ifndef INT8_TYPE
642#define INT8_TYPE ((const char *) NULL)
643#endif
644
645#ifndef INT16_TYPE
646#define INT16_TYPE ((const char *) NULL)
647#endif
648
649#ifndef INT32_TYPE
650#define INT32_TYPE ((const char *) NULL)
651#endif
652
653#ifndef INT64_TYPE
654#define INT64_TYPE ((const char *) NULL)
655#endif
656
657#ifndef UINT8_TYPE
658#define UINT8_TYPE ((const char *) NULL)
659#endif
660
661#ifndef UINT16_TYPE
662#define UINT16_TYPE ((const char *) NULL)
663#endif
664
665#ifndef UINT32_TYPE
666#define UINT32_TYPE ((const char *) NULL)
667#endif
668
669#ifndef UINT64_TYPE
670#define UINT64_TYPE ((const char *) NULL)
671#endif
672
673#ifndef INT_LEAST8_TYPE
674#define INT_LEAST8_TYPE ((const char *) NULL)
675#endif
676
677#ifndef INT_LEAST16_TYPE
678#define INT_LEAST16_TYPE ((const char *) NULL)
679#endif
680
681#ifndef INT_LEAST32_TYPE
682#define INT_LEAST32_TYPE ((const char *) NULL)
683#endif
684
685#ifndef INT_LEAST64_TYPE
686#define INT_LEAST64_TYPE ((const char *) NULL)
687#endif
688
689#ifndef UINT_LEAST8_TYPE
690#define UINT_LEAST8_TYPE ((const char *) NULL)
691#endif
692
693#ifndef UINT_LEAST16_TYPE
694#define UINT_LEAST16_TYPE ((const char *) NULL)
695#endif
696
697#ifndef UINT_LEAST32_TYPE
698#define UINT_LEAST32_TYPE ((const char *) NULL)
699#endif
700
701#ifndef UINT_LEAST64_TYPE
702#define UINT_LEAST64_TYPE ((const char *) NULL)
703#endif
704
705#ifndef INT_FAST8_TYPE
706#define INT_FAST8_TYPE ((const char *) NULL)
707#endif
708
709#ifndef INT_FAST16_TYPE
710#define INT_FAST16_TYPE ((const char *) NULL)
711#endif
712
713#ifndef INT_FAST32_TYPE
714#define INT_FAST32_TYPE ((const char *) NULL)
715#endif
716
717#ifndef INT_FAST64_TYPE
718#define INT_FAST64_TYPE ((const char *) NULL)
719#endif
720
721#ifndef UINT_FAST8_TYPE
722#define UINT_FAST8_TYPE ((const char *) NULL)
723#endif
724
725#ifndef UINT_FAST16_TYPE
726#define UINT_FAST16_TYPE ((const char *) NULL)
727#endif
728
729#ifndef UINT_FAST32_TYPE
730#define UINT_FAST32_TYPE ((const char *) NULL)
731#endif
732
733#ifndef UINT_FAST64_TYPE
734#define UINT_FAST64_TYPE ((const char *) NULL)
735#endif
736
737#ifndef INTPTR_TYPE
738#define INTPTR_TYPE ((const char *) NULL)
739#endif
740
741#ifndef UINTPTR_TYPE
742#define UINTPTR_TYPE ((const char *) NULL)
743#endif
744
3cf24182 745/* Width in bits of a pointer. Mind the value of the macro `Pmode'. */
746#ifndef POINTER_SIZE
747#define POINTER_SIZE BITS_PER_WORD
748#endif
4765975c 749#ifndef POINTER_SIZE_UNITS
750#define POINTER_SIZE_UNITS ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT)
751#endif
752
3cf24182 753
14e6e4d4 754#ifndef PIC_OFFSET_TABLE_REGNUM
755#define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
756#endif
757
260e669e 758#ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
759#define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 0
760#endif
761
3aa0c315 762#ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
763#define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
764#endif
765
3c5c992f 766#ifndef TARGET_DECLSPEC
3aa0c315 767#if TARGET_DLLIMPORT_DECL_ATTRIBUTES
3c5c992f 768/* If the target supports the "dllimport" attribute, users are
769 probably used to the "__declspec" syntax. */
770#define TARGET_DECLSPEC 1
771#else
772#define TARGET_DECLSPEC 0
773#endif
774#endif
775
96842e40 776/* By default, the preprocessor should be invoked the same way in C++
777 as in C. */
778#ifndef CPLUSPLUS_CPP_SPEC
779#ifdef CPP_SPEC
780#define CPLUSPLUS_CPP_SPEC CPP_SPEC
781#endif
782#endif
783
f89331aa 784#ifndef ACCUMULATE_OUTGOING_ARGS
785#define ACCUMULATE_OUTGOING_ARGS 0
786#endif
787
3f3d5ad4 788/* By default, use the GNU runtime for Objective C. */
789#ifndef NEXT_OBJC_RUNTIME
790#define NEXT_OBJC_RUNTIME 0
791#endif
792
f89331aa 793/* Supply a default definition for PUSH_ARGS. */
794#ifndef PUSH_ARGS
795#ifdef PUSH_ROUNDING
796#define PUSH_ARGS !ACCUMULATE_OUTGOING_ARGS
797#else
798#define PUSH_ARGS 0
799#endif
800#endif
801
8c69f6fb 802/* Decide whether a function's arguments should be processed
803 from first to last or from last to first.
804
805 They should if the stack and args grow in opposite directions, but
806 only if we have push insns. */
807
808#ifdef PUSH_ROUNDING
809
810#ifndef PUSH_ARGS_REVERSED
811#if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
812#define PUSH_ARGS_REVERSED PUSH_ARGS
813#endif
814#endif
815
816#endif
817
818#ifndef PUSH_ARGS_REVERSED
819#define PUSH_ARGS_REVERSED 0
820#endif
821
65c05dfd 822/* Default value for the alignment (in bits) a C conformant malloc has to
823 provide. This default is intended to be safe and always correct. */
824#ifndef MALLOC_ABI_ALIGNMENT
825#define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
826#endif
827
9dc9d0d3 828/* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
829 STACK_BOUNDARY is required. */
830#ifndef PREFERRED_STACK_BOUNDARY
831#define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
832#endif
833
27a7a23a 834/* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not
835 defined. */
836#ifndef INCOMING_STACK_BOUNDARY
837#define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY
838#endif
839
6b5553e5 840#ifndef TARGET_DEFAULT_PACK_STRUCT
841#define TARGET_DEFAULT_PACK_STRUCT 0
842#endif
843
5c43f650 844/* By default, the vtable entries are void pointers, the so the alignment
845 is the same as pointer alignment. The value of this macro specifies
846 the alignment of the vtable entry in bits. It should be defined only
7299020b 847 when special alignment is necessary. */
5c43f650 848#ifndef TARGET_VTABLE_ENTRY_ALIGN
849#define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
850#endif
851
852/* There are a few non-descriptor entries in the vtable at offsets below
853 zero. If these entries must be padded (say, to preserve the alignment
854 specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
855 words in each data entry. */
856#ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
857#define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
858#endif
859
5c0b8490 860/* Decide whether it is safe to use a local alias for a virtual function
861 when constructing thunks. */
862#ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
863#ifdef ASM_OUTPUT_DEF
864#define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
865#else
866#define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
867#endif
868#endif
869
07b8a412 870/* Decide whether target supports aliases. */
871#ifndef TARGET_SUPPORTS_ALIASES
872#ifdef ASM_OUTPUT_DEF
873#define TARGET_SUPPORTS_ALIASES 1
874#else
875#define TARGET_SUPPORTS_ALIASES 0
876#endif
877#endif
878
ad5818ae 879/* Select a format to encode pointers in exception handling data. We
880 prefer those that result in fewer dynamic relocations. Assume no
881 special support here and encode direct references. */
882#ifndef ASM_PREFERRED_EH_DATA_FORMAT
883#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) DW_EH_PE_absptr
884#endif
885
3aba38cc 886/* By default, the C++ compiler will use the lowest bit of the pointer
887 to function to indicate a pointer-to-member-function points to a
888 virtual member function. However, if FUNCTION_BOUNDARY indicates
889 function addresses aren't always even, the lowest bit of the delta
890 field will be used. */
891#ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
892#define TARGET_PTRMEMFUNC_VBIT_LOCATION \
893 (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
894 ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
895#endif
896
1a6f9700 897#ifndef DEFAULT_GDB_EXTENSIONS
898#define DEFAULT_GDB_EXTENSIONS 1
899#endif
900
901/* If more than one debugging type is supported, you must define
346e0763 902 PREFERRED_DEBUGGING_TYPE to choose the default. */
1a6f9700 903
4c52ff7a 904#if 1 < (defined (DBX_DEBUGGING_INFO) \
346e0763 905 + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
906 + defined (VMS_DEBUGGING_INFO))
1a6f9700 907#ifndef PREFERRED_DEBUGGING_TYPE
346e0763 908#error You must define PREFERRED_DEBUGGING_TYPE
1a6f9700 909#endif /* no PREFERRED_DEBUGGING_TYPE */
346e0763 910
911/* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
912 here so other code needn't care. */
913#elif defined DBX_DEBUGGING_INFO
1a6f9700 914#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
346e0763 915
a328e031 916#elif defined DWARF2_DEBUGGING_INFO || defined DWARF2_LINENO_DEBUGGING_INFO
1a6f9700 917#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
346e0763 918
919#elif defined VMS_DEBUGGING_INFO
8d60d2bc 920#define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
346e0763 921
922#elif defined XCOFF_DEBUGGING_INFO
1a6f9700 923#define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
1a6f9700 924
346e0763 925#else
926/* No debugging format is supported by this target. */
1a6f9700 927#define PREFERRED_DEBUGGING_TYPE NO_DEBUG
928#endif
929
f2f543a3 930#ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
931#define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
932#endif
933
597ff315 934/* True if the targets integer-comparison functions return { 0, 1, 2
30e9913f 935 } to indicate { <, ==, > }. False if { -1, 0, 1 } is used
936 instead. The libgcc routines are biased. */
937#ifndef TARGET_LIB_INT_CMP_BIASED
938#define TARGET_LIB_INT_CMP_BIASED (true)
939#endif
940
ef936590 941/* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
942 then the word-endianness is the same as for integers. */
aa870c1b 943#ifndef FLOAT_WORDS_BIG_ENDIAN
944#define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
945#endif
946
76c64076 947#ifndef REG_WORDS_BIG_ENDIAN
948#define REG_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
949#endif
950
f3dde807 951
c4503c0a 952#ifndef TARGET_DEC_EVAL_METHOD
953#define TARGET_DEC_EVAL_METHOD 2
954#endif
955
4f18499c 956#ifndef HAS_LONG_COND_BRANCH
957#define HAS_LONG_COND_BRANCH 0
958#endif
959
960#ifndef HAS_LONG_UNCOND_BRANCH
961#define HAS_LONG_UNCOND_BRANCH 0
962#endif
963
70ac8784 964/* Determine whether __cxa_atexit, rather than atexit, is used to
7299020b 965 register C++ destructors for local statics and global objects. */
70ac8784 966#ifndef DEFAULT_USE_CXA_ATEXIT
967#define DEFAULT_USE_CXA_ATEXIT 0
968#endif
969
026d3868 970#if GCC_VERSION >= 3000 && defined IN_GCC
971/* These old constraint macros shouldn't appear anywhere in a
972 configuration using MD constraint definitions. */
48ea5577 973#endif
974
05c1aa95 975/* Determin whether the target runtime library is Bionic */
976#ifndef TARGET_HAS_BIONIC
977#define TARGET_HAS_BIONIC 0
978#endif
979
8f4be2be 980/* Indicate that CLZ and CTZ are undefined at zero. */
9e7454d0 981#ifndef CLZ_DEFINED_VALUE_AT_ZERO
8f4be2be 982#define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
983#endif
9e7454d0 984#ifndef CTZ_DEFINED_VALUE_AT_ZERO
8f4be2be 985#define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
986#endif
987
194b1cc5 988/* Provide a default value for STORE_FLAG_VALUE. */
989#ifndef STORE_FLAG_VALUE
990#define STORE_FLAG_VALUE 1
991#endif
992
0ba2d907 993/* This macro is used to determine what the largest unit size that
994 move_by_pieces can use is. */
995
996/* MOVE_MAX_PIECES is the number of bytes at a time which we can
997 move efficiently, as opposed to MOVE_MAX which is the maximum
998 number of bytes we can move with a single instruction. */
999
1000#ifndef MOVE_MAX_PIECES
1001#define MOVE_MAX_PIECES MOVE_MAX
1002#endif
1003
0ec3791c 1004/* STORE_MAX_PIECES is the number of bytes at a time that we can
1005 store efficiently. Due to internal GCC limitations, this is
1006 MOVE_MAX_PIECES limited by the number of bytes GCC can represent
1007 for an immediate constant. */
1008
1009#ifndef STORE_MAX_PIECES
1010#define STORE_MAX_PIECES MIN (MOVE_MAX_PIECES, 2 * sizeof (HOST_WIDE_INT))
1011#endif
1012
3e346f54 1013/* Likewise for block comparisons. */
1014#ifndef COMPARE_MAX_PIECES
1015#define COMPARE_MAX_PIECES MOVE_MAX_PIECES
1016#endif
1017
c3997e3d 1018#ifndef MAX_MOVE_MAX
1019#define MAX_MOVE_MAX MOVE_MAX
1020#endif
1021
1022#ifndef MIN_UNITS_PER_WORD
1023#define MIN_UNITS_PER_WORD UNITS_PER_WORD
1024#endif
1025
d7c908eb 1026#ifndef MAX_BITS_PER_WORD
1027#define MAX_BITS_PER_WORD BITS_PER_WORD
1028#endif
1029
891a1732 1030#ifndef STACK_POINTER_OFFSET
1031#define STACK_POINTER_OFFSET 0
1032#endif
1033
0b43a491 1034#ifndef LOCAL_REGNO
1035#define LOCAL_REGNO(REGNO) 0
1036#endif
1037
d44f2f7c 1038#ifndef HONOR_REG_ALLOC_ORDER
1039#define HONOR_REG_ALLOC_ORDER 0
1040#endif
1041
13c5e7bf 1042/* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1043 the stack pointer does not matter. The value is tested only in
1044 functions that have frame pointers. */
1045#ifndef EXIT_IGNORE_STACK
1046#define EXIT_IGNORE_STACK 0
1047#endif
1048
0f5c9560 1049/* Assume that case vectors are not pc-relative. */
1050#ifndef CASE_VECTOR_PC_RELATIVE
1051#define CASE_VECTOR_PC_RELATIVE 0
1052#endif
1053
a27e3913 1054/* Force minimum alignment to be able to use the least significant bits
1055 for distinguishing descriptor addresses from code addresses. */
1056#define FUNCTION_ALIGNMENT(ALIGN) \
1057 (lang_hooks.custom_function_descriptors \
1058 && targetm.calls.custom_function_descriptors > 0 \
1059 ? MAX ((ALIGN), \
1060 2 * targetm.calls.custom_function_descriptors * BITS_PER_UNIT)\
1061 : (ALIGN))
1062
4ee9c684 1063/* Assume that trampolines need function alignment. */
1064#ifndef TRAMPOLINE_ALIGNMENT
a27e3913 1065#define TRAMPOLINE_ALIGNMENT FUNCTION_ALIGNMENT (FUNCTION_BOUNDARY)
4ee9c684 1066#endif
1067
a6e6eeae 1068/* Register mappings for target machines without register windows. */
1069#ifndef INCOMING_REGNO
1070#define INCOMING_REGNO(N) (N)
1071#endif
1072
1073#ifndef OUTGOING_REGNO
1074#define OUTGOING_REGNO(N) (N)
1075#endif
1076
98de49b3 1077#ifndef SHIFT_COUNT_TRUNCATED
1078#define SHIFT_COUNT_TRUNCATED 0
1079#endif
1080
7151fd0e 1081#ifndef LEGITIMATE_PIC_OPERAND_P
1082#define LEGITIMATE_PIC_OPERAND_P(X) 1
1083#endif
1084
e9ff93b1 1085#ifndef TARGET_MEM_CONSTRAINT
1086#define TARGET_MEM_CONSTRAINT 'm'
1087#endif
1088
8665fd86 1089#ifndef REVERSIBLE_CC_MODE
1090#define REVERSIBLE_CC_MODE(MODE) 0
1091#endif
1092
2ca6f7cc 1093/* Biggest alignment supported by the object file format of this machine. */
1094#ifndef MAX_OFILE_ALIGNMENT
1095#define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
1096#endif
1097
d28d5017 1098#ifndef FRAME_GROWS_DOWNWARD
1099#define FRAME_GROWS_DOWNWARD 0
1100#endif
1101
a26d6c60 1102#ifndef RETURN_ADDR_IN_PREVIOUS_FRAME
1103#define RETURN_ADDR_IN_PREVIOUS_FRAME 0
1104#endif
1105
12d886b8 1106/* On most machines, the CFA coincides with the first incoming parm. */
1107#ifndef ARG_POINTER_CFA_OFFSET
c9b5e4ec 1108#define ARG_POINTER_CFA_OFFSET(FNDECL) \
1109 (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
12d886b8 1110#endif
1111
89fa767a 1112/* On most machines, we use the CFA as DW_AT_frame_base. */
1113#ifndef CFA_FRAME_BASE_OFFSET
1114#define CFA_FRAME_BASE_OFFSET(FNDECL) 0
1115#endif
1116
12d886b8 1117/* The offset from the incoming value of %sp to the top of the stack frame
1118 for the current function. */
1119#ifndef INCOMING_FRAME_SP_OFFSET
1120#define INCOMING_FRAME_SP_OFFSET 0
1121#endif
1122
695595bc 1123#ifndef HARD_REGNO_NREGS_HAS_PADDING
1124#define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
1125#define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
1126#endif
1127
63c68695 1128#ifndef OUTGOING_REG_PARM_STACK_SPACE
22c61100 1129#define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
63c68695 1130#endif
1131
27a7a23a 1132/* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
1133 the backend. MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
1134 effort stack alignment supported by the backend. If the backend
1135 supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
1136 MAX_STACK_ALIGNMENT are the same. Otherwise, the incoming stack
1137 boundary will limit the maximum guaranteed stack alignment. */
1138#ifdef MAX_STACK_ALIGNMENT
1139#define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
1140#else
1141#define MAX_STACK_ALIGNMENT STACK_BOUNDARY
1142#define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
1143#endif
1144
1145#define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
1146
ad33891d 1147#ifndef LOCAL_ALIGNMENT
1148#define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
1149#endif
1150
1151#ifndef STACK_SLOT_ALIGNMENT
1152#define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
1153 ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
1154#endif
1155
76cbc2a0 1156#ifndef LOCAL_DECL_ALIGNMENT
1157#define LOCAL_DECL_ALIGNMENT(DECL) \
1158 LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
1159#endif
1160
8645d3e7 1161#ifndef MINIMUM_ALIGNMENT
1162#define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN)
1163#endif
1164
02421213 1165/* Alignment value for attribute ((aligned)). */
1166#ifndef ATTRIBUTE_ALIGNED_VALUE
1167#define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
1168#endif
1169
181dd1c5 1170/* For most ports anything that evaluates to a constant symbolic
1171 or integer value is acceptable as a constant address. */
1172#ifndef CONSTANT_ADDRESS_P
1173#define CONSTANT_ADDRESS_P(X) (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE)
1174#endif
1175
b2e48750 1176#ifndef MAX_FIXED_MODE_SIZE
1177#define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
1178#endif
1179
4aafe913 1180/* Nonzero if structures and unions should be returned in memory.
1181
1182 This should only be defined if compatibility with another compiler or
1183 with an ABI is needed, because it results in slower code. */
1184
1185#ifndef DEFAULT_PCC_STRUCT_RETURN
1186#define DEFAULT_PCC_STRUCT_RETURN 1
1187#endif
e754ed1d 1188
0791e28d 1189#ifndef PCC_BITFIELD_TYPE_MATTERS
1190#define PCC_BITFIELD_TYPE_MATTERS false
1191#endif
1192
91f95f00 1193#ifndef INSN_SETS_ARE_DELAYED
1194#define INSN_SETS_ARE_DELAYED(INSN) false
1195#endif
1196
6d7f2074 1197#ifndef INSN_REFERENCES_ARE_DELAYED
1198#define INSN_REFERENCES_ARE_DELAYED(INSN) false
1199#endif
1200
93516111 1201#ifndef NO_FUNCTION_CSE
1202#define NO_FUNCTION_CSE false
1203#endif
1204
e239bb25 1205#ifndef HARD_REGNO_RENAME_OK
1206#define HARD_REGNO_RENAME_OK(FROM, TO) true
1207#endif
1208
10ea5dad 1209#ifndef EPILOGUE_USES
1210#define EPILOGUE_USES(REG) false
1211#endif
1212
25ecdd6d 1213#ifndef ARGS_GROW_DOWNWARD
1214#define ARGS_GROW_DOWNWARD 0
1215#endif
1216
2b785411 1217#ifndef STACK_GROWS_DOWNWARD
1218#define STACK_GROWS_DOWNWARD 0
1219#endif
1220
279a4851 1221#ifndef STACK_PUSH_CODE
1222#if STACK_GROWS_DOWNWARD
1223#define STACK_PUSH_CODE PRE_DEC
1224#else
1225#define STACK_PUSH_CODE PRE_INC
1226#endif
1227#endif
1228
e9abca4f 1229/* Default value for flag_pie when flag_pie is initialized to -1:
1230 --enable-default-pie: Default flag_pie to -fPIE.
1231 --disable-default-pie: Default flag_pie to 0.
1232 */
1233#ifdef ENABLE_DEFAULT_PIE
1234# ifndef DEFAULT_FLAG_PIE
1235# define DEFAULT_FLAG_PIE 2
1236# endif
1237#else
1238# define DEFAULT_FLAG_PIE 0
1239#endif
1240
0f861224 1241#ifndef SWITCHABLE_TARGET
1242#define SWITCHABLE_TARGET 0
1243#endif
1244
1245/* If the target supports integers that are wider than two
1246 HOST_WIDE_INTs on the host compiler, then the target should define
1247 TARGET_SUPPORTS_WIDE_INT and make the appropriate fixups.
1248 Otherwise the compiler really is not robust. */
1249#ifndef TARGET_SUPPORTS_WIDE_INT
1250#define TARGET_SUPPORTS_WIDE_INT 0
1251#endif
1252
d0b99710 1253#ifndef SHORT_IMMEDIATES_SIGN_EXTEND
1254#define SHORT_IMMEDIATES_SIGN_EXTEND 0
1255#endif
1256
94f1fba7 1257#ifndef WORD_REGISTER_OPERATIONS
1258#define WORD_REGISTER_OPERATIONS 0
1259#endif
1260
91af28a2 1261#ifndef LOAD_EXTEND_OP
1262#define LOAD_EXTEND_OP(M) UNKNOWN
1263#endif
1264
3f840859 1265#ifndef INITIAL_FRAME_ADDRESS_RTX
1266#define INITIAL_FRAME_ADDRESS_RTX NULL
1267#endif
1268
3dd01ce6 1269#ifndef SETUP_FRAME_ADDRESSES
1270#define SETUP_FRAME_ADDRESSES() do { } while (0)
1271#endif
1272
a9e2e8b5 1273#ifndef DYNAMIC_CHAIN_ADDRESS
1274#define DYNAMIC_CHAIN_ADDRESS(x) (x)
1275#endif
1276
440a66da 1277#ifndef FRAME_ADDR_RTX
1278#define FRAME_ADDR_RTX(x) (x)
1279#endif
1280
e6daccdf 1281#ifndef REVERSE_CONDITION
1282#define REVERSE_CONDITION(code, mode) reverse_condition (code)
1283#endif
1284
6bf973f6 1285#ifndef TARGET_PECOFF
1286#define TARGET_PECOFF 0
1287#endif
1288
66303da2 1289#ifndef TARGET_COFF
1290#define TARGET_COFF 0
1291#endif
1292
05aaca92 1293#ifndef EH_RETURN_HANDLER_RTX
1294#define EH_RETURN_HANDLER_RTX NULL
1295#endif
1296
e754ed1d 1297#ifdef GCC_INSN_FLAGS_H
1298/* Dependent default target macro definitions
1299
1300 This section of defaults.h defines target macros that depend on generated
1301 headers. This is a bit awkward: We want to put all default definitions
1302 for target macros in defaults.h, but some of the defaults depend on the
1303 HAVE_* flags defines of insn-flags.h. But insn-flags.h is not always
1304 included by files that do include defaults.h.
1305
1306 Fortunately, the default macro definitions that depend on the HAVE_*
1307 macros are also the ones that will only be used inside GCC itself, i.e.
1308 not in the gen* programs or in target objects like libgcc.
1309
1310 Obviously, it would be best to keep this section of defaults.h as small
1311 as possible, by converting the macros defined below to target hooks or
1312 functions.
1313*/
1314
e754ed1d 1315/* The default branch cost is 1. */
1316#ifndef BRANCH_COST
1317#define BRANCH_COST(speed_p, predictable_p) 1
1318#endif
1319
1320/* If a memory-to-memory move would take MOVE_RATIO or more simple
f135a8d4 1321 move-instruction sequences, we will do a cpymem or libcall instead. */
e754ed1d 1322
1323#ifndef MOVE_RATIO
f135a8d4 1324#if defined (HAVE_cpymemqi) || defined (HAVE_cpymemhi) || defined (HAVE_cpymemsi) || defined (HAVE_cpymemdi) || defined (HAVE_cpymemti)
e754ed1d 1325#define MOVE_RATIO(speed) 2
1326#else
1327/* If we are optimizing for space (-Os), cut down the default move ratio. */
1328#define MOVE_RATIO(speed) ((speed) ? 15 : 3)
1329#endif
1330#endif
1331
1332/* If a clear memory operation would take CLEAR_RATIO or more simple
1333 move-instruction sequences, we will do a setmem or libcall instead. */
1334
1335#ifndef CLEAR_RATIO
1336#if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
1337#define CLEAR_RATIO(speed) 2
1338#else
1339/* If we are optimizing for space, cut down the default clear ratio. */
1340#define CLEAR_RATIO(speed) ((speed) ? 15 :3)
1341#endif
1342#endif
1343
1344/* If a memory set (to value other than zero) operation would take
f135a8d4 1345 SET_RATIO or more simple move-instruction sequences, we will do a setmem
e754ed1d 1346 or libcall instead. */
1347#ifndef SET_RATIO
9af5ce0c 1348#define SET_RATIO(speed) MOVE_RATIO (speed)
e754ed1d 1349#endif
1350
e754ed1d 1351/* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
1352 Normally move_insn, so Pmode stack pointer. */
1353
1354#ifndef STACK_SAVEAREA_MODE
1355#define STACK_SAVEAREA_MODE(LEVEL) Pmode
1356#endif
1357
1358/* Supply a default definition of STACK_SIZE_MODE for
1359 allocate_dynamic_stack_space. Normally PLUS/MINUS, so word_mode. */
1360
1361#ifndef STACK_SIZE_MODE
1362#define STACK_SIZE_MODE word_mode
1363#endif
1364
6957b94e 1365/* Default value for flag_stack_protect when flag_stack_protect is initialized to -1:
1366 --enable-default-ssp: Default flag_stack_protect to -fstack-protector-strong.
1367 --disable-default-ssp: Default flag_stack_protect to 0.
1368 */
1369#ifdef ENABLE_DEFAULT_SSP
1370# ifndef DEFAULT_FLAG_SSP
1371# define DEFAULT_FLAG_SSP 3
1372# endif
1373#else
1374# define DEFAULT_FLAG_SSP 0
1375#endif
1376
e754ed1d 1377/* Provide default values for the macros controlling stack checking. */
1378
1379/* The default is neither full builtin stack checking... */
1380#ifndef STACK_CHECK_BUILTIN
1381#define STACK_CHECK_BUILTIN 0
1382#endif
1383
1384/* ...nor static builtin stack checking. */
1385#ifndef STACK_CHECK_STATIC_BUILTIN
1386#define STACK_CHECK_STATIC_BUILTIN 0
1387#endif
1388
1389/* The default interval is one page (4096 bytes). */
1390#ifndef STACK_CHECK_PROBE_INTERVAL_EXP
1391#define STACK_CHECK_PROBE_INTERVAL_EXP 12
1392#endif
1393
1394/* The default is not to move the stack pointer. */
1395#ifndef STACK_CHECK_MOVING_SP
1396#define STACK_CHECK_MOVING_SP 0
1397#endif
1398
1399/* This is a kludge to try to capture the discrepancy between the old
1400 mechanism (generic stack checking) and the new mechanism (static
1401 builtin stack checking). STACK_CHECK_PROTECT needs to be bumped
1402 for the latter because part of the protection area is effectively
1403 included in STACK_CHECK_MAX_FRAME_SIZE for the former. */
1404#ifdef STACK_CHECK_PROTECT
1405#define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
1406#else
218e3e4e 1407#define STACK_OLD_CHECK_PROTECT \
5ee1325b 1408 (!global_options.x_flag_exceptions \
218e3e4e 1409 ? 75 * UNITS_PER_WORD \
5ee1325b 1410 : targetm_common.except_unwind_info (&global_options) == UI_SJLJ \
1411 ? 4 * 1024 \
1412 : 8 * 1024)
e754ed1d 1413#endif
1414
1415/* Minimum amount of stack required to recover from an anticipated stack
1416 overflow detection. The default value conveys an estimate of the amount
1417 of stack required to propagate an exception. */
1418#ifndef STACK_CHECK_PROTECT
218e3e4e 1419#define STACK_CHECK_PROTECT \
5ee1325b 1420 (!global_options.x_flag_exceptions \
1421 ? 4 * 1024 \
1422 : targetm_common.except_unwind_info (&global_options) == UI_SJLJ \
1423 ? 8 * 1024 \
1424 : 12 * 1024)
e754ed1d 1425#endif
1426
1427/* Make the maximum frame size be the largest we can and still only need
1428 one probe per function. */
1429#ifndef STACK_CHECK_MAX_FRAME_SIZE
1430#define STACK_CHECK_MAX_FRAME_SIZE \
1431 ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD)
1432#endif
1433
1434/* This is arbitrary, but should be large enough everywhere. */
1435#ifndef STACK_CHECK_FIXED_FRAME_SIZE
1436#define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
1437#endif
1438
1439/* Provide a reasonable default for the maximum size of an object to
1440 allocate in the fixed frame. We may need to be able to make this
1441 controllable by the user at some point. */
1442#ifndef STACK_CHECK_MAX_VAR_SIZE
1443#define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
1444#endif
1445
0f0e309f 1446/* By default, the C++ compiler will use function addresses in the
1447 vtable entries. Setting this nonzero tells the compiler to use
1448 function descriptors instead. The value of this macro says how
1449 many words wide the descriptor is (normally 2). It is assumed
1450 that the address of a function descriptor may be treated as a
1451 pointer to a function. */
1452#ifndef TARGET_VTABLE_USES_DESCRIPTORS
1453#define TARGET_VTABLE_USES_DESCRIPTORS 0
1454#endif
1455
e754ed1d 1456#endif /* GCC_INSN_FLAGS_H */
1457
f78f10d6 1458#ifndef DWARF_GNAT_ENCODINGS_DEFAULT
1459#define DWARF_GNAT_ENCODINGS_DEFAULT DWARF_GNAT_ENCODINGS_GDB
1460#endif
1461
16bf5121 1462#ifndef USED_FOR_TARGET
1463/* Done this way to keep gengtype happy. */
1464#if BITS_PER_UNIT == 8
1465#define TARGET_UNIT uint8_t
1466#elif BITS_PER_UNIT == 16
1467#define TARGET_UNIT uint16_t
1468#elif BITS_PER_UNIT == 32
1469#define TARGET_UNIT uint32_t
1470#else
1471#error Unknown BITS_PER_UNIT
1472#endif
1473typedef TARGET_UNIT target_unit;
1474#endif
1475
2a281353 1476#endif /* ! GCC_DEFAULTS_H */
Mirror of https://gcc.gnu.org/git/gcc.git