GCC Middle and Back End API Reference
defaults.h
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1 /* Definitions of various defaults for tm.h macros.
2  Copyright (C) 1992-2013 Free Software Foundation, Inc.
3  Contributed by Ron Guilmette (rfg@monkeys.com)
4 
5 This file is part of GCC.
6 
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
10 version.
11 
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
15 for more details.
16 
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.
20 
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/>. */
25 
26 #ifndef GCC_DEFAULTS_H
27 #define GCC_DEFAULTS_H
28 
29 /* How to start an assembler comment. */
30 #ifndef ASM_COMMENT_START
31 #define ASM_COMMENT_START ";#"
32 #endif
33 
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. */
37 
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 
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)); \
56  } while (0)
57 #endif
58 
59 /* Choose a reasonable default for ASM_OUTPUT_ASCII. */
60 
61 #ifndef ASM_OUTPUT_ASCII
62 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
63  do { \
64  FILE *_hide_asm_out_file = (MYFILE); \
65  const unsigned char *_hide_p = (const unsigned char *) (MYSTRING); \
66  int _hide_thissize = (MYLENGTH); \
67  { \
68  FILE *asm_out_file = _hide_asm_out_file; \
69  const unsigned char *p = _hide_p; \
70  int thissize = _hide_thissize; \
71  int i; \
72  fprintf (asm_out_file, "\t.ascii \""); \
73  \
74  for (i = 0; i < thissize; i++) \
75  { \
76  int c = p[i]; \
77  if (c == '\"' || c == '\\') \
78  putc ('\\', asm_out_file); \
79  if (ISPRINT (c)) \
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. \
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 \""); \
91  } \
92  } \
93  fprintf (asm_out_file, "\"\n"); \
94  } \
95  } \
96  while (0)
97 #endif
98 
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) \
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"); \
108  } while (0)
109 #endif
110 #endif
111 
112 #ifndef IFUNC_ASM_TYPE
113 #define IFUNC_ASM_TYPE "gnu_indirect_function"
114 #endif
115 
116 #ifndef TLS_COMMON_ASM_OP
117 #define TLS_COMMON_ASM_OP ".tls_common"
118 #endif
119 
120 #if defined (HAVE_AS_TLS) && !defined (ASM_OUTPUT_TLS_COMMON)
121 #define ASM_OUTPUT_TLS_COMMON(FILE, DECL, NAME, SIZE) \
122  do \
123  { \
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); \
128  } \
129  while (0)
130 #endif
131 
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
138 /* This is how to output the definition of a user-level label named
139  NAME, such as the label on variable NAME. */
140 
141 #ifndef ASM_OUTPUT_LABEL
142 #define ASM_OUTPUT_LABEL(FILE,NAME) \
143  do { \
144  assemble_name ((FILE), (NAME)); \
145  fputs (":\n", (FILE)); \
146  } while (0)
147 #endif
148 
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 
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 
166 /* This is how to output a reference to a user-level label named NAME. */
167 
168 #ifndef ASM_OUTPUT_LABELREF
169 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
170  do { \
171  fputs (user_label_prefix, (FILE)); \
172  fputs ((NAME), (FILE)); \
173  } while (0);
174 #endif
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) \
182  (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM)
183 #endif
184 
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) \
189  do \
190  { \
191  ASM_WEAKEN_LABEL (STREAM, NAME); \
192  if (VALUE) \
193  ASM_OUTPUT_DEF (STREAM, NAME, VALUE); \
194  } \
195  while (0)
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
207 #define ASM_OUTPUT_WEAKREF(FILE, DECL, NAME, VALUE) \
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)
217 #endif
218 #endif
219 
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); \
245  fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \
246  } \
247  while (0)
248 
249 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME) \
250  do \
251  { \
252  fputs (SIZE_ASM_OP, STREAM); \
253  assemble_name (STREAM, NAME); \
254  fputs (", .-", STREAM); \
255  assemble_name (STREAM, NAME); \
256  putc ('\n', STREAM); \
257  } \
258  while (0)
259 
260 #endif
261 #endif
262 
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
268 #else
269 #define SUPPORTS_WEAK 0
270 #endif
271 #endif
272 
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 
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 
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 
298 /* This determines whether weak symbols must be left out of a static
299  archive's table of contents. Defining this macro to be nonzero has
300  the consequence that certain symbols will not be made weak that
301  otherwise would be. The C++ ABI requires this macro to be zero;
302  see the documentation. */
303 #ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
304 #define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
305 #endif
306 
307 /* This determines whether or not we need linkonce unwind information. */
308 #ifndef TARGET_USES_WEAK_UNWIND_INFO
309 #define TARGET_USES_WEAK_UNWIND_INFO 0
310 #endif
311 
312 /* By default, there is no prefix on user-defined symbols. */
313 #ifndef USER_LABEL_PREFIX
314 #define USER_LABEL_PREFIX ""
315 #endif
316 
317 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
318  provide a weak attribute. Else define it to nothing.
319 
320  This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
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
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
338 
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 
345 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
346  the rest of the DWARF 2 frame unwind support is also provided. */
347 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
348 #define DWARF2_UNWIND_INFO 1
349 #endif
350 
351 /* If we have named sections, and we're using crtstuff to run ctors,
352  use them for registering eh frame information. */
353 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
354  && !defined (EH_FRAME_IN_DATA_SECTION)
355 #ifndef EH_FRAME_SECTION_NAME
356 #define EH_FRAME_SECTION_NAME ".eh_frame"
357 #endif
358 #endif
359 
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 
380 /* If we have named section and we support weak symbols, then use the
381  .jcr section for recording java classes which need to be registered
382  at program start-up time. */
383 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
384 #ifndef JCR_SECTION_NAME
385 #define JCR_SECTION_NAME ".jcr"
386 #endif
387 #endif
388 
389 /* This decision to use a .jcr section can be overridden by defining
390  USE_JCR_SECTION to 0 in target file. This is necessary if target
391  can define JCR_SECTION_NAME but does not have crtstuff or
392  linker support for .jcr section. */
393 #ifndef TARGET_USE_JCR_SECTION
394 #ifdef JCR_SECTION_NAME
395 #define TARGET_USE_JCR_SECTION 1
396 #else
397 #define TARGET_USE_JCR_SECTION 0
398 #endif
399 #endif
401 /* Number of hardware registers that go into the DWARF-2 unwind info.
402  If not defined, equals FIRST_PSEUDO_REGISTER */
403 
404 #ifndef DWARF_FRAME_REGISTERS
405 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
406 #endif
407 
408 /* Offsets recorded in opcodes are a multiple of this alignment factor. */
409 #ifndef DWARF_CIE_DATA_ALIGNMENT
410 #ifdef STACK_GROWS_DOWNWARD
411 #define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD))
412 #else
413 #define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD)
414 #endif
415 #endif
416 
417 /* The DWARF 2 CFA column which tracks the return address. Normally this
418  is the column for PC, or the first column after all of the hard
419  registers. */
420 #ifndef DWARF_FRAME_RETURN_COLUMN
421 #ifdef PC_REGNUM
422 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM)
423 #else
424 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGISTERS
425 #endif
426 #endif
427 
428 /* How to renumber registers for dbx and gdb. If not defined, assume
429  no renumbering is necessary. */
430 
431 #ifndef DBX_REGISTER_NUMBER
432 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
433 #endif
434 
435 /* The mapping from gcc register number to DWARF 2 CFA column number.
436  By default, we just provide columns for all registers. */
437 #ifndef DWARF_FRAME_REGNUM
438 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
439 #endif
440 
441 /* Map register numbers held in the call frame info that gcc has
442  collected using DWARF_FRAME_REGNUM to those that should be output in
443  .debug_frame and .eh_frame. */
444 #ifndef DWARF2_FRAME_REG_OUT
445 #define DWARF2_FRAME_REG_OUT(REGNO, FOR_EH) (REGNO)
446 #endif
447 
448 /* The size of addresses as they appear in the Dwarf 2 data.
449  Some architectures use word addresses to refer to code locations,
450  but Dwarf 2 info always uses byte addresses. On such machines,
451  Dwarf 2 addresses need to be larger than the architecture's
452  pointers. */
453 #ifndef DWARF2_ADDR_SIZE
454 #define DWARF2_ADDR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
455 #endif
456 
457 /* The size in bytes of a DWARF field indicating an offset or length
458  relative to a debug info section, specified to be 4 bytes in the
459  DWARF-2 specification. The SGI/MIPS ABI defines it to be the same
460  as PTR_SIZE. */
461 #ifndef DWARF_OFFSET_SIZE
462 #define DWARF_OFFSET_SIZE 4
463 #endif
464 
465 /* The size in bytes of a DWARF 4 type signature. */
466 #ifndef DWARF_TYPE_SIGNATURE_SIZE
467 #define DWARF_TYPE_SIGNATURE_SIZE 8
468 #endif
470 /* Default sizes for base C types. If the sizes are different for
471  your target, you should override these values by defining the
472  appropriate symbols in your tm.h file. */
473 
474 #ifndef BITS_PER_UNIT
475 #define BITS_PER_UNIT 8
476 #endif
478 #ifndef BITS_PER_WORD
479 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
480 #endif
481 
482 #ifndef CHAR_TYPE_SIZE
483 #define CHAR_TYPE_SIZE BITS_PER_UNIT
484 #endif
485 
486 #ifndef BOOL_TYPE_SIZE
487 /* `bool' has size and alignment `1', on almost all platforms. */
488 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
489 #endif
490 
491 #ifndef SHORT_TYPE_SIZE
492 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
493 #endif
494 
495 #ifndef INT_TYPE_SIZE
496 #define INT_TYPE_SIZE BITS_PER_WORD
497 #endif
498 
499 #ifndef LONG_TYPE_SIZE
500 #define LONG_TYPE_SIZE BITS_PER_WORD
501 #endif
503 #ifndef LONG_LONG_TYPE_SIZE
504 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
505 #endif
506 
507 #ifndef WCHAR_TYPE_SIZE
508 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
509 #endif
510 
511 #ifndef FLOAT_TYPE_SIZE
512 #define FLOAT_TYPE_SIZE BITS_PER_WORD
513 #endif
514 
515 #ifndef DOUBLE_TYPE_SIZE
516 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
517 #endif
518 
519 #ifndef LONG_DOUBLE_TYPE_SIZE
520 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
521 #endif
522 
523 #ifndef DECIMAL32_TYPE_SIZE
524 #define DECIMAL32_TYPE_SIZE 32
525 #endif
526 
527 #ifndef DECIMAL64_TYPE_SIZE
528 #define DECIMAL64_TYPE_SIZE 64
529 #endif
530 
531 #ifndef DECIMAL128_TYPE_SIZE
532 #define DECIMAL128_TYPE_SIZE 128
533 #endif
534 
535 #ifndef SHORT_FRACT_TYPE_SIZE
536 #define SHORT_FRACT_TYPE_SIZE BITS_PER_UNIT
537 #endif
538 
539 #ifndef FRACT_TYPE_SIZE
540 #define FRACT_TYPE_SIZE (BITS_PER_UNIT * 2)
541 #endif
542 
543 #ifndef LONG_FRACT_TYPE_SIZE
544 #define LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 4)
545 #endif
546 
547 #ifndef LONG_LONG_FRACT_TYPE_SIZE
548 #define LONG_LONG_FRACT_TYPE_SIZE (BITS_PER_UNIT * 8)
549 #endif
550 
551 #ifndef SHORT_ACCUM_TYPE_SIZE
552 #define SHORT_ACCUM_TYPE_SIZE (SHORT_FRACT_TYPE_SIZE * 2)
553 #endif
554 
555 #ifndef ACCUM_TYPE_SIZE
556 #define ACCUM_TYPE_SIZE (FRACT_TYPE_SIZE * 2)
557 #endif
558 
559 #ifndef LONG_ACCUM_TYPE_SIZE
560 #define LONG_ACCUM_TYPE_SIZE (LONG_FRACT_TYPE_SIZE * 2)
561 #endif
562 
563 #ifndef LONG_LONG_ACCUM_TYPE_SIZE
564 #define LONG_LONG_ACCUM_TYPE_SIZE (LONG_LONG_FRACT_TYPE_SIZE * 2)
565 #endif
566 
567 /* We let tm.h override the types used here, to handle trivial differences
568  such as the choice of unsigned int or long unsigned int for size_t.
569  When machines start needing nontrivial differences in the size type,
570  it would be best to do something here to figure out automatically
571  from other information what type to use. */
572 
573 #ifndef SIZE_TYPE
574 #define SIZE_TYPE "long unsigned int"
575 #endif
576 
577 #ifndef SIZETYPE
578 #define SIZETYPE SIZE_TYPE
579 #endif
580 
581 #ifndef PID_TYPE
582 #define PID_TYPE "int"
583 #endif
584 
585 /* If GCC knows the exact uint_least16_t and uint_least32_t types from
586  <stdint.h>, use them for char16_t and char32_t. Otherwise, use
587  these guesses; getting the wrong type of a given width will not
588  affect C++ name mangling because in C++ these are distinct types
589  not typedefs. */
590 
591 #ifdef UINT_LEAST16_TYPE
592 #define CHAR16_TYPE UINT_LEAST16_TYPE
593 #else
594 #define CHAR16_TYPE "short unsigned int"
595 #endif
596 
597 #ifdef UINT_LEAST32_TYPE
598 #define CHAR32_TYPE UINT_LEAST32_TYPE
599 #else
600 #define CHAR32_TYPE "unsigned int"
601 #endif
602 
603 #ifndef WCHAR_TYPE
604 #define WCHAR_TYPE "int"
605 #endif
606 
607 /* WCHAR_TYPE gets overridden by -fshort-wchar. */
608 #define MODIFIED_WCHAR_TYPE \
609  (flag_short_wchar ? "short unsigned int" : WCHAR_TYPE)
610 
611 #ifndef PTRDIFF_TYPE
612 #define PTRDIFF_TYPE "long int"
613 #endif
614 
615 #ifndef WINT_TYPE
616 #define WINT_TYPE "unsigned int"
617 #endif
618 
619 #ifndef INTMAX_TYPE
620 #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
621  ? "int" \
622  : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
623  ? "long int" \
624  : "long long int"))
625 #endif
626 
627 #ifndef UINTMAX_TYPE
628 #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
629  ? "unsigned int" \
630  : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
631  ? "long unsigned int" \
632  : "long long unsigned int"))
633 #endif
634 
635 
636 /* There are no default definitions of these <stdint.h> types. */
637 
638 #ifndef SIG_ATOMIC_TYPE
639 #define SIG_ATOMIC_TYPE ((const char *) NULL)
640 #endif
641 
642 #ifndef INT8_TYPE
643 #define INT8_TYPE ((const char *) NULL)
644 #endif
645 
646 #ifndef INT16_TYPE
647 #define INT16_TYPE ((const char *) NULL)
648 #endif
649 
650 #ifndef INT32_TYPE
651 #define INT32_TYPE ((const char *) NULL)
652 #endif
653 
654 #ifndef INT64_TYPE
655 #define INT64_TYPE ((const char *) NULL)
656 #endif
657 
658 #ifndef UINT8_TYPE
659 #define UINT8_TYPE ((const char *) NULL)
660 #endif
661 
662 #ifndef UINT16_TYPE
663 #define UINT16_TYPE ((const char *) NULL)
664 #endif
665 
666 #ifndef UINT32_TYPE
667 #define UINT32_TYPE ((const char *) NULL)
668 #endif
669 
670 #ifndef UINT64_TYPE
671 #define UINT64_TYPE ((const char *) NULL)
672 #endif
673 
674 #ifndef INT_LEAST8_TYPE
675 #define INT_LEAST8_TYPE ((const char *) NULL)
676 #endif
677 
678 #ifndef INT_LEAST16_TYPE
679 #define INT_LEAST16_TYPE ((const char *) NULL)
680 #endif
681 
682 #ifndef INT_LEAST32_TYPE
683 #define INT_LEAST32_TYPE ((const char *) NULL)
684 #endif
685 
686 #ifndef INT_LEAST64_TYPE
687 #define INT_LEAST64_TYPE ((const char *) NULL)
688 #endif
689 
690 #ifndef UINT_LEAST8_TYPE
691 #define UINT_LEAST8_TYPE ((const char *) NULL)
692 #endif
693 
694 #ifndef UINT_LEAST16_TYPE
695 #define UINT_LEAST16_TYPE ((const char *) NULL)
696 #endif
697 
698 #ifndef UINT_LEAST32_TYPE
699 #define UINT_LEAST32_TYPE ((const char *) NULL)
700 #endif
701 
702 #ifndef UINT_LEAST64_TYPE
703 #define UINT_LEAST64_TYPE ((const char *) NULL)
704 #endif
705 
706 #ifndef INT_FAST8_TYPE
707 #define INT_FAST8_TYPE ((const char *) NULL)
708 #endif
709 
710 #ifndef INT_FAST16_TYPE
711 #define INT_FAST16_TYPE ((const char *) NULL)
712 #endif
713 
714 #ifndef INT_FAST32_TYPE
715 #define INT_FAST32_TYPE ((const char *) NULL)
716 #endif
717 
718 #ifndef INT_FAST64_TYPE
719 #define INT_FAST64_TYPE ((const char *) NULL)
720 #endif
721 
722 #ifndef UINT_FAST8_TYPE
723 #define UINT_FAST8_TYPE ((const char *) NULL)
724 #endif
725 
726 #ifndef UINT_FAST16_TYPE
727 #define UINT_FAST16_TYPE ((const char *) NULL)
728 #endif
729 
730 #ifndef UINT_FAST32_TYPE
731 #define UINT_FAST32_TYPE ((const char *) NULL)
732 #endif
733 
734 #ifndef UINT_FAST64_TYPE
735 #define UINT_FAST64_TYPE ((const char *) NULL)
736 #endif
737 
738 #ifndef INTPTR_TYPE
739 #define INTPTR_TYPE ((const char *) NULL)
740 #endif
741 
742 #ifndef UINTPTR_TYPE
743 #define UINTPTR_TYPE ((const char *) NULL)
744 #endif
745 
746 /* Width in bits of a pointer. Mind the value of the macro `Pmode'. */
747 #ifndef POINTER_SIZE
748 #define POINTER_SIZE BITS_PER_WORD
749 #endif
750 
751 #ifndef PIC_OFFSET_TABLE_REGNUM
752 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
753 #endif
754 
755 #ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
756 #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 0
757 #endif
758 
759 #ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
760 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
761 #endif
762 
763 #ifndef TARGET_DECLSPEC
764 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
765 /* If the target supports the "dllimport" attribute, users are
766  probably used to the "__declspec" syntax. */
767 #define TARGET_DECLSPEC 1
768 #else
769 #define TARGET_DECLSPEC 0
770 #endif
771 #endif
773 /* By default, the preprocessor should be invoked the same way in C++
774  as in C. */
775 #ifndef CPLUSPLUS_CPP_SPEC
776 #ifdef CPP_SPEC
777 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
778 #endif
779 #endif
781 #ifndef ACCUMULATE_OUTGOING_ARGS
782 #define ACCUMULATE_OUTGOING_ARGS 0
783 #endif
785 /* By default, use the GNU runtime for Objective C. */
786 #ifndef NEXT_OBJC_RUNTIME
787 #define NEXT_OBJC_RUNTIME 0
788 #endif
789 
790 /* Supply a default definition for PUSH_ARGS. */
791 #ifndef PUSH_ARGS
792 #ifdef PUSH_ROUNDING
793 #define PUSH_ARGS !ACCUMULATE_OUTGOING_ARGS
794 #else
795 #define PUSH_ARGS 0
796 #endif
797 #endif
799 /* Decide whether a function's arguments should be processed
800  from first to last or from last to first.
801 
802  They should if the stack and args grow in opposite directions, but
803  only if we have push insns. */
804 
805 #ifdef PUSH_ROUNDING
806 
807 #ifndef PUSH_ARGS_REVERSED
808 #if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
809 #define PUSH_ARGS_REVERSED PUSH_ARGS
810 #endif
811 #endif
813 #endif
814 
815 #ifndef PUSH_ARGS_REVERSED
816 #define PUSH_ARGS_REVERSED 0
817 #endif
818 
819 /* Default value for the alignment (in bits) a C conformant malloc has to
820  provide. This default is intended to be safe and always correct. */
821 #ifndef MALLOC_ABI_ALIGNMENT
822 #define MALLOC_ABI_ALIGNMENT BITS_PER_WORD
823 #endif
824 
825 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
826  STACK_BOUNDARY is required. */
827 #ifndef PREFERRED_STACK_BOUNDARY
828 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
829 #endif
830 
831 /* Set INCOMING_STACK_BOUNDARY to PREFERRED_STACK_BOUNDARY if it is not
832  defined. */
833 #ifndef INCOMING_STACK_BOUNDARY
834 #define INCOMING_STACK_BOUNDARY PREFERRED_STACK_BOUNDARY
835 #endif
836 
837 #ifndef TARGET_DEFAULT_PACK_STRUCT
838 #define TARGET_DEFAULT_PACK_STRUCT 0
839 #endif
840 
841 /* By default, the vtable entries are void pointers, the so the alignment
842  is the same as pointer alignment. The value of this macro specifies
843  the alignment of the vtable entry in bits. It should be defined only
844  when special alignment is necessary. */
845 #ifndef TARGET_VTABLE_ENTRY_ALIGN
846 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
847 #endif
848 
849 /* There are a few non-descriptor entries in the vtable at offsets below
850  zero. If these entries must be padded (say, to preserve the alignment
851  specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
852  words in each data entry. */
853 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
854 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
855 #endif
856 
857 /* Decide whether it is safe to use a local alias for a virtual function
858  when constructing thunks. */
859 #ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
860 #ifdef ASM_OUTPUT_DEF
861 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
862 #else
863 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
864 #endif
865 #endif
866 
867 /* Select a format to encode pointers in exception handling data. We
868  prefer those that result in fewer dynamic relocations. Assume no
869  special support here and encode direct references. */
870 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
871 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) DW_EH_PE_absptr
872 #endif
873 
874 /* By default, the C++ compiler will use the lowest bit of the pointer
875  to function to indicate a pointer-to-member-function points to a
876  virtual member function. However, if FUNCTION_BOUNDARY indicates
877  function addresses aren't always even, the lowest bit of the delta
878  field will be used. */
879 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
880 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
881  (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
882  ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
883 #endif
885 #ifndef DEFAULT_GDB_EXTENSIONS
886 #define DEFAULT_GDB_EXTENSIONS 1
887 #endif
889 /* If more than one debugging type is supported, you must define
890  PREFERRED_DEBUGGING_TYPE to choose the default. */
891 
892 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
893  + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
894  + defined (VMS_DEBUGGING_INFO))
895 #ifndef PREFERRED_DEBUGGING_TYPE
896 #error You must define PREFERRED_DEBUGGING_TYPE
897 #endif /* no PREFERRED_DEBUGGING_TYPE */
898 
899 /* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
900  here so other code needn't care. */
901 #elif defined DBX_DEBUGGING_INFO
902 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
903 
904 #elif defined SDB_DEBUGGING_INFO
905 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
907 #elif defined DWARF2_DEBUGGING_INFO
908 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
909 
910 #elif defined VMS_DEBUGGING_INFO
911 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
912 
913 #elif defined XCOFF_DEBUGGING_INFO
914 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
915 
916 #else
917 /* No debugging format is supported by this target. */
918 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
919 #endif
920 
921 #ifndef LARGEST_EXPONENT_IS_NORMAL
922 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
923 #endif
924 
925 #ifndef ROUND_TOWARDS_ZERO
926 #define ROUND_TOWARDS_ZERO 0
927 #endif
928 
929 #ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
930 #define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
931 #endif
932 
933 /* True if the targets integer-comparison functions return { 0, 1, 2
934  } to indicate { <, ==, > }. False if { -1, 0, 1 } is used
935  instead. The libgcc routines are biased. */
936 #ifndef TARGET_LIB_INT_CMP_BIASED
937 #define TARGET_LIB_INT_CMP_BIASED (true)
938 #endif
939 
940 /* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
941  then the word-endianness is the same as for integers. */
942 #ifndef FLOAT_WORDS_BIG_ENDIAN
943 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
944 #endif
945 
946 #ifndef REG_WORDS_BIG_ENDIAN
947 #define REG_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
948 #endif
949 
950 #ifdef TARGET_FLT_EVAL_METHOD
951 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 1
952 #else
953 #define TARGET_FLT_EVAL_METHOD 0
954 #define TARGET_FLT_EVAL_METHOD_NON_DEFAULT 0
955 #endif
956 
957 #ifndef TARGET_DEC_EVAL_METHOD
958 #define TARGET_DEC_EVAL_METHOD 2
959 #endif
960 
961 #ifndef HAS_LONG_COND_BRANCH
962 #define HAS_LONG_COND_BRANCH 0
963 #endif
964 
965 #ifndef HAS_LONG_UNCOND_BRANCH
966 #define HAS_LONG_UNCOND_BRANCH 0
967 #endif
968 
969 /* Determine whether __cxa_atexit, rather than atexit, is used to
970  register C++ destructors for local statics and global objects. */
971 #ifndef DEFAULT_USE_CXA_ATEXIT
972 #define DEFAULT_USE_CXA_ATEXIT 0
973 #endif
974 
975 /* If none of these macros are defined, the port must use the new
976  technique of defining constraints in the machine description.
977  tm_p.h will define those macros that machine-independent code
978  still uses. */
979 #if !defined CONSTRAINT_LEN \
980  && !defined REG_CLASS_FROM_LETTER \
981  && !defined REG_CLASS_FROM_CONSTRAINT \
982  && !defined CONST_OK_FOR_LETTER_P \
983  && !defined CONST_OK_FOR_CONSTRAINT_P \
984  && !defined CONST_DOUBLE_OK_FOR_LETTER_P \
985  && !defined CONST_DOUBLE_OK_FOR_CONSTRAINT_P \
986  && !defined EXTRA_CONSTRAINT \
987  && !defined EXTRA_CONSTRAINT_STR \
988  && !defined EXTRA_MEMORY_CONSTRAINT \
989  && !defined EXTRA_ADDRESS_CONSTRAINT
990 
991 #define USE_MD_CONSTRAINTS
992 
993 #if GCC_VERSION >= 3000 && defined IN_GCC
994 /* These old constraint macros shouldn't appear anywhere in a
995  configuration using MD constraint definitions. */
996 #pragma GCC poison REG_CLASS_FROM_LETTER CONST_OK_FOR_LETTER_P \
997  CONST_DOUBLE_OK_FOR_LETTER_P EXTRA_CONSTRAINT
998 #endif
999 
1000 #else /* old constraint mechanism in use */
1001 
1002 /* Determine whether extra constraint letter should be handled
1003  via address reload (like 'o'). */
1004 #ifndef EXTRA_MEMORY_CONSTRAINT
1005 #define EXTRA_MEMORY_CONSTRAINT(C,STR) 0
1006 #endif
1008 /* Determine whether extra constraint letter should be handled
1009  as an address (like 'p'). */
1010 #ifndef EXTRA_ADDRESS_CONSTRAINT
1011 #define EXTRA_ADDRESS_CONSTRAINT(C,STR) 0
1012 #endif
1014 /* When a port defines CONSTRAINT_LEN, it should use DEFAULT_CONSTRAINT_LEN
1015  for all the characters that it does not want to change, so things like the
1016  'length' of a digit in a matching constraint is an implementation detail,
1017  and not part of the interface. */
1018 #define DEFAULT_CONSTRAINT_LEN(C,STR) 1
1019 
1020 #ifndef CONSTRAINT_LEN
1021 #define CONSTRAINT_LEN(C,STR) DEFAULT_CONSTRAINT_LEN (C, STR)
1022 #endif
1023 
1024 #if defined (CONST_OK_FOR_LETTER_P) && ! defined (CONST_OK_FOR_CONSTRAINT_P)
1025 #define CONST_OK_FOR_CONSTRAINT_P(VAL,C,STR) CONST_OK_FOR_LETTER_P (VAL, C)
1026 #endif
1027 
1028 #if defined (CONST_DOUBLE_OK_FOR_LETTER_P) && ! defined (CONST_DOUBLE_OK_FOR_CONSTRAINT_P)
1029 #define CONST_DOUBLE_OK_FOR_CONSTRAINT_P(OP,C,STR) \
1030  CONST_DOUBLE_OK_FOR_LETTER_P (OP, C)
1031 #endif
1032 
1033 #ifndef REG_CLASS_FROM_CONSTRAINT
1034 #define REG_CLASS_FROM_CONSTRAINT(C,STR) REG_CLASS_FROM_LETTER (C)
1035 #endif
1036 
1037 #if defined (EXTRA_CONSTRAINT) && ! defined (EXTRA_CONSTRAINT_STR)
1038 #define EXTRA_CONSTRAINT_STR(OP, C,STR) EXTRA_CONSTRAINT (OP, C)
1039 #endif
1040 
1041 #endif /* old constraint mechanism in use */
1042 
1043 /* Determin whether the target runtime library is Bionic */
1044 #ifndef TARGET_HAS_BIONIC
1045 #define TARGET_HAS_BIONIC 0
1046 #endif
1047 
1048 /* Indicate that CLZ and CTZ are undefined at zero. */
1049 #ifndef CLZ_DEFINED_VALUE_AT_ZERO
1050 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
1051 #endif
1052 #ifndef CTZ_DEFINED_VALUE_AT_ZERO
1053 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) 0
1054 #endif
1055 
1056 /* Provide a default value for STORE_FLAG_VALUE. */
1057 #ifndef STORE_FLAG_VALUE
1058 #define STORE_FLAG_VALUE 1
1059 #endif
1060 
1061 /* This macro is used to determine what the largest unit size that
1062  move_by_pieces can use is. */
1063 
1064 /* MOVE_MAX_PIECES is the number of bytes at a time which we can
1065  move efficiently, as opposed to MOVE_MAX which is the maximum
1066  number of bytes we can move with a single instruction. */
1067 
1068 #ifndef MOVE_MAX_PIECES
1069 #define MOVE_MAX_PIECES MOVE_MAX
1070 #endif
1071 
1072 #ifndef MAX_MOVE_MAX
1073 #define MAX_MOVE_MAX MOVE_MAX
1074 #endif
1075 
1076 #ifndef MIN_UNITS_PER_WORD
1077 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
1078 #endif
1079 
1080 #ifndef MAX_BITS_PER_WORD
1081 #define MAX_BITS_PER_WORD BITS_PER_WORD
1082 #endif
1083 
1084 #ifndef STACK_POINTER_OFFSET
1085 #define STACK_POINTER_OFFSET 0
1086 #endif
1087 
1088 #ifndef LOCAL_REGNO
1089 #define LOCAL_REGNO(REGNO) 0
1090 #endif
1091 
1092 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1093  the stack pointer does not matter. The value is tested only in
1094  functions that have frame pointers. */
1095 #ifndef EXIT_IGNORE_STACK
1096 #define EXIT_IGNORE_STACK 0
1097 #endif
1098 
1099 /* Assume that case vectors are not pc-relative. */
1100 #ifndef CASE_VECTOR_PC_RELATIVE
1101 #define CASE_VECTOR_PC_RELATIVE 0
1102 #endif
1103 
1104 /* Assume that trampolines need function alignment. */
1105 #ifndef TRAMPOLINE_ALIGNMENT
1106 #define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY
1107 #endif
1108 
1109 /* Register mappings for target machines without register windows. */
1110 #ifndef INCOMING_REGNO
1111 #define INCOMING_REGNO(N) (N)
1112 #endif
1113 
1114 #ifndef OUTGOING_REGNO
1115 #define OUTGOING_REGNO(N) (N)
1116 #endif
1117 
1118 #ifndef SHIFT_COUNT_TRUNCATED
1119 #define SHIFT_COUNT_TRUNCATED 0
1120 #endif
1122 #ifndef LEGITIMATE_PIC_OPERAND_P
1123 #define LEGITIMATE_PIC_OPERAND_P(X) 1
1124 #endif
1125 
1126 #ifndef TARGET_MEM_CONSTRAINT
1127 #define TARGET_MEM_CONSTRAINT 'm'
1128 #endif
1129 
1130 #ifndef REVERSIBLE_CC_MODE
1131 #define REVERSIBLE_CC_MODE(MODE) 0
1132 #endif
1133 
1134 /* Biggest alignment supported by the object file format of this machine. */
1135 #ifndef MAX_OFILE_ALIGNMENT
1136 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
1137 #endif
1138 
1139 #ifndef FRAME_GROWS_DOWNWARD
1140 #define FRAME_GROWS_DOWNWARD 0
1141 #endif
1142 
1143 /* On most machines, the CFA coincides with the first incoming parm. */
1144 #ifndef ARG_POINTER_CFA_OFFSET
1145 #define ARG_POINTER_CFA_OFFSET(FNDECL) \
1146  (FIRST_PARM_OFFSET (FNDECL) + crtl->args.pretend_args_size)
1147 #endif
1149 /* On most machines, we use the CFA as DW_AT_frame_base. */
1150 #ifndef CFA_FRAME_BASE_OFFSET
1151 #define CFA_FRAME_BASE_OFFSET(FNDECL) 0
1152 #endif
1153 
1154 /* The offset from the incoming value of %sp to the top of the stack frame
1155  for the current function. */
1156 #ifndef INCOMING_FRAME_SP_OFFSET
1157 #define INCOMING_FRAME_SP_OFFSET 0
1158 #endif
1159 
1160 #ifndef HARD_REGNO_NREGS_HAS_PADDING
1161 #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
1162 #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
1163 #endif
1164 
1165 #ifndef OUTGOING_REG_PARM_STACK_SPACE
1166 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 0
1167 #endif
1169 /* MAX_STACK_ALIGNMENT is the maximum stack alignment guaranteed by
1170  the backend. MAX_SUPPORTED_STACK_ALIGNMENT is the maximum best
1171  effort stack alignment supported by the backend. If the backend
1172  supports stack alignment, MAX_SUPPORTED_STACK_ALIGNMENT and
1173  MAX_STACK_ALIGNMENT are the same. Otherwise, the incoming stack
1174  boundary will limit the maximum guaranteed stack alignment. */
1175 #ifdef MAX_STACK_ALIGNMENT
1176 #define MAX_SUPPORTED_STACK_ALIGNMENT MAX_STACK_ALIGNMENT
1177 #else
1178 #define MAX_STACK_ALIGNMENT STACK_BOUNDARY
1179 #define MAX_SUPPORTED_STACK_ALIGNMENT PREFERRED_STACK_BOUNDARY
1180 #endif
1181 
1182 #define SUPPORTS_STACK_ALIGNMENT (MAX_STACK_ALIGNMENT > STACK_BOUNDARY)
1183 
1184 #ifndef LOCAL_ALIGNMENT
1185 #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT
1186 #endif
1187 
1188 #ifndef STACK_SLOT_ALIGNMENT
1189 #define STACK_SLOT_ALIGNMENT(TYPE,MODE,ALIGN) \
1190  ((TYPE) ? LOCAL_ALIGNMENT ((TYPE), (ALIGN)) : (ALIGN))
1191 #endif
1192 
1193 #ifndef LOCAL_DECL_ALIGNMENT
1194 #define LOCAL_DECL_ALIGNMENT(DECL) \
1195  LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL))
1196 #endif
1197 
1198 #ifndef MINIMUM_ALIGNMENT
1199 #define MINIMUM_ALIGNMENT(EXP,MODE,ALIGN) (ALIGN)
1200 #endif
1201 
1202 /* Alignment value for attribute ((aligned)). */
1203 #ifndef ATTRIBUTE_ALIGNED_VALUE
1204 #define ATTRIBUTE_ALIGNED_VALUE BIGGEST_ALIGNMENT
1205 #endif
1207 #ifndef SLOW_UNALIGNED_ACCESS
1208 #define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) STRICT_ALIGNMENT
1209 #endif
1210 
1211 /* For most ports anything that evaluates to a constant symbolic
1212  or integer value is acceptable as a constant address. */
1213 #ifndef CONSTANT_ADDRESS_P
1214 #define CONSTANT_ADDRESS_P(X) (CONSTANT_P (X) && GET_CODE (X) != CONST_DOUBLE)
1215 #endif
1217 #ifndef MAX_FIXED_MODE_SIZE
1218 #define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
1219 #endif
1220 
1221 /* Nonzero if structures and unions should be returned in memory.
1223  This should only be defined if compatibility with another compiler or
1224  with an ABI is needed, because it results in slower code. */
1225 
1226 #ifndef DEFAULT_PCC_STRUCT_RETURN
1227 #define DEFAULT_PCC_STRUCT_RETURN 1
1228 #endif
1230 #ifdef GCC_INSN_FLAGS_H
1231 /* Dependent default target macro definitions
1232 
1233  This section of defaults.h defines target macros that depend on generated
1234  headers. This is a bit awkward: We want to put all default definitions
1235  for target macros in defaults.h, but some of the defaults depend on the
1236  HAVE_* flags defines of insn-flags.h. But insn-flags.h is not always
1237  included by files that do include defaults.h.
1238 
1239  Fortunately, the default macro definitions that depend on the HAVE_*
1240  macros are also the ones that will only be used inside GCC itself, i.e.
1241  not in the gen* programs or in target objects like libgcc.
1242 
1243  Obviously, it would be best to keep this section of defaults.h as small
1244  as possible, by converting the macros defined below to target hooks or
1245  functions.
1246 */
1247 
1248 /* The default branch cost is 1. */
1249 #ifndef BRANCH_COST
1250 #define BRANCH_COST(speed_p, predictable_p) 1
1251 #endif
1252 
1253 /* If a memory-to-memory move would take MOVE_RATIO or more simple
1254  move-instruction sequences, we will do a movmem or libcall instead. */
1255 
1256 #ifndef MOVE_RATIO
1257 #if defined (HAVE_movmemqi) || defined (HAVE_movmemhi) || defined (HAVE_movmemsi) || defined (HAVE_movmemdi) || defined (HAVE_movmemti)
1258 #define MOVE_RATIO(speed) 2
1259 #else
1260 /* If we are optimizing for space (-Os), cut down the default move ratio. */
1261 #define MOVE_RATIO(speed) ((speed) ? 15 : 3)
1262 #endif
1263 #endif
1264 
1265 /* If a clear memory operation would take CLEAR_RATIO or more simple
1266  move-instruction sequences, we will do a setmem or libcall instead. */
1267 
1268 #ifndef CLEAR_RATIO
1269 #if defined (HAVE_setmemqi) || defined (HAVE_setmemhi) || defined (HAVE_setmemsi) || defined (HAVE_setmemdi) || defined (HAVE_setmemti)
1270 #define CLEAR_RATIO(speed) 2
1271 #else
1272 /* If we are optimizing for space, cut down the default clear ratio. */
1273 #define CLEAR_RATIO(speed) ((speed) ? 15 :3)
1274 #endif
1275 #endif
1276 
1277 /* If a memory set (to value other than zero) operation would take
1278  SET_RATIO or more simple move-instruction sequences, we will do a movmem
1279  or libcall instead. */
1280 #ifndef SET_RATIO
1281 #define SET_RATIO(speed) MOVE_RATIO (speed)
1282 #endif
1283 
1284 /* Supply a default definition for FUNCTION_ARG_PADDING:
1285  usually pad upward, but pad short args downward on
1286  big-endian machines. */
1287 
1288 #define DEFAULT_FUNCTION_ARG_PADDING(MODE, TYPE) \
1289  (! BYTES_BIG_ENDIAN \
1290  ? upward \
1291  : (((MODE) == BLKmode \
1292  ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST \
1293  && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \
1294  : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY) \
1295  ? downward : upward))
1297 #ifndef FUNCTION_ARG_PADDING
1298 #define FUNCTION_ARG_PADDING(MODE, TYPE) \
1299  DEFAULT_FUNCTION_ARG_PADDING ((MODE), (TYPE))
1300 #endif
1301 
1302 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
1303  Normally move_insn, so Pmode stack pointer. */
1304 
1305 #ifndef STACK_SAVEAREA_MODE
1306 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
1307 #endif
1308 
1309 /* Supply a default definition of STACK_SIZE_MODE for
1310  allocate_dynamic_stack_space. Normally PLUS/MINUS, so word_mode. */
1311 
1312 #ifndef STACK_SIZE_MODE
1313 #define STACK_SIZE_MODE word_mode
1314 #endif
1315 
1316 /* Provide default values for the macros controlling stack checking. */
1317 
1318 /* The default is neither full builtin stack checking... */
1319 #ifndef STACK_CHECK_BUILTIN
1320 #define STACK_CHECK_BUILTIN 0
1321 #endif
1322 
1323 /* ...nor static builtin stack checking. */
1324 #ifndef STACK_CHECK_STATIC_BUILTIN
1325 #define STACK_CHECK_STATIC_BUILTIN 0
1326 #endif
1327 
1328 /* The default interval is one page (4096 bytes). */
1329 #ifndef STACK_CHECK_PROBE_INTERVAL_EXP
1330 #define STACK_CHECK_PROBE_INTERVAL_EXP 12
1331 #endif
1332 
1333 /* The default is not to move the stack pointer. */
1334 #ifndef STACK_CHECK_MOVING_SP
1335 #define STACK_CHECK_MOVING_SP 0
1336 #endif
1337 
1338 /* This is a kludge to try to capture the discrepancy between the old
1339  mechanism (generic stack checking) and the new mechanism (static
1340  builtin stack checking). STACK_CHECK_PROTECT needs to be bumped
1341  for the latter because part of the protection area is effectively
1342  included in STACK_CHECK_MAX_FRAME_SIZE for the former. */
1343 #ifdef STACK_CHECK_PROTECT
1344 #define STACK_OLD_CHECK_PROTECT STACK_CHECK_PROTECT
1345 #else
1346 #define STACK_OLD_CHECK_PROTECT \
1347  (targetm_common.except_unwind_info (&global_options) == UI_SJLJ \
1348  ? 75 * UNITS_PER_WORD \
1349  : 8 * 1024)
1350 #endif
1351 
1352 /* Minimum amount of stack required to recover from an anticipated stack
1353  overflow detection. The default value conveys an estimate of the amount
1354  of stack required to propagate an exception. */
1355 #ifndef STACK_CHECK_PROTECT
1356 #define STACK_CHECK_PROTECT \
1357  (targetm_common.except_unwind_info (&global_options) == UI_SJLJ \
1358  ? 75 * UNITS_PER_WORD \
1359  : 12 * 1024)
1360 #endif
1361 
1362 /* Make the maximum frame size be the largest we can and still only need
1363  one probe per function. */
1364 #ifndef STACK_CHECK_MAX_FRAME_SIZE
1365 #define STACK_CHECK_MAX_FRAME_SIZE \
1366  ((1 << STACK_CHECK_PROBE_INTERVAL_EXP) - UNITS_PER_WORD)
1367 #endif
1368 
1369 /* This is arbitrary, but should be large enough everywhere. */
1370 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
1371 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
1372 #endif
1373 
1374 /* Provide a reasonable default for the maximum size of an object to
1375  allocate in the fixed frame. We may need to be able to make this
1376  controllable by the user at some point. */
1377 #ifndef STACK_CHECK_MAX_VAR_SIZE
1378 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
1379 #endif
1380 
1381 /* By default, the C++ compiler will use function addresses in the
1382  vtable entries. Setting this nonzero tells the compiler to use
1383  function descriptors instead. The value of this macro says how
1384  many words wide the descriptor is (normally 2). It is assumed
1385  that the address of a function descriptor may be treated as a
1386  pointer to a function. */
1387 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
1388 #define TARGET_VTABLE_USES_DESCRIPTORS 0
1389 #endif
1390 
1391 #ifndef SWITCHABLE_TARGET
1392 #define SWITCHABLE_TARGET 0
1393 #endif
1394 
1395 #endif /* GCC_INSN_FLAGS_H */
1396 
1397 #endif /* ! GCC_DEFAULTS_H */