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1 12 jlechner
/* Definitions of various defaults for tm.h macros.
2
   Copyright (C) 1992, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
3
   2005
4
   Free Software Foundation, Inc.
5
   Contributed by Ron Guilmette (rfg@monkeys.com)
6
 
7
This file is part of GCC.
8
 
9
GCC is free software; you can redistribute it and/or modify it under
10
the terms of the GNU General Public License as published by the Free
11
Software Foundation; either version 2, or (at your option) any later
12
version.
13
 
14
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
15
WARRANTY; without even the implied warranty of MERCHANTABILITY or
16
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
17
for more details.
18
 
19
You should have received a copy of the GNU General Public License
20
along with GCC; see the file COPYING.  If not, write to the Free
21
Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
22
02110-1301, USA.  */
23
 
24
#ifndef GCC_DEFAULTS_H
25
#define GCC_DEFAULTS_H
26
 
27
#ifndef GET_ENVIRONMENT
28
#define GET_ENVIRONMENT(VALUE, NAME) do { (VALUE) = getenv (NAME); } while (0)
29
#endif
30
 
31
#define obstack_chunk_alloc     ((void *(*) (long)) xmalloc)
32
#define obstack_chunk_free      ((void (*) (void *)) free)
33
#define OBSTACK_CHUNK_SIZE      0
34
#define gcc_obstack_init(OBSTACK)                       \
35
  _obstack_begin ((OBSTACK), OBSTACK_CHUNK_SIZE, 0,      \
36
                  obstack_chunk_alloc,                  \
37
                  obstack_chunk_free)
38
 
39
/* Store in OUTPUT a string (made with alloca) containing an
40
   assembler-name for a local static variable or function named NAME.
41
   LABELNO is an integer which is different for each call.  */
42
 
43
#ifndef ASM_PN_FORMAT
44
# ifndef NO_DOT_IN_LABEL
45
#  define ASM_PN_FORMAT "%s.%lu"
46
# else
47
#  ifndef NO_DOLLAR_IN_LABEL
48
#   define ASM_PN_FORMAT "%s$%lu"
49
#  else
50
#   define ASM_PN_FORMAT "__%s_%lu"
51
#  endif
52
# endif
53
#endif /* ! ASM_PN_FORMAT */
54
 
55
#ifndef ASM_FORMAT_PRIVATE_NAME
56
# define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
57
  do { const char *const name_ = (NAME); \
58
       char *const output_ = (OUTPUT) = \
59
         (char *) alloca (strlen (name_) + 32); \
60
       sprintf (output_, ASM_PN_FORMAT, name_, (unsigned long)(LABELNO)); \
61
  } while (0)
62
#endif
63
 
64
/* Choose a reasonable default for ASM_OUTPUT_ASCII.  */
65
 
66
#ifndef ASM_OUTPUT_ASCII
67
#define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
68
  do {                                                                        \
69
    FILE *_hide_asm_out_file = (MYFILE);                                      \
70
    const unsigned char *_hide_p = (const unsigned char *) (MYSTRING);        \
71
    int _hide_thissize = (MYLENGTH);                                          \
72
    {                                                                         \
73
      FILE *asm_out_file = _hide_asm_out_file;                                \
74
      const unsigned char *p = _hide_p;                                       \
75
      int thissize = _hide_thissize;                                          \
76
      int i;                                                                  \
77
      fprintf (asm_out_file, "\t.ascii \"");                                  \
78
                                                                              \
79
      for (i = 0; i < thissize; i++)                                           \
80
        {                                                                     \
81
          int c = p[i];                                                       \
82
          if (c == '\"' || c == '\\')                                         \
83
            putc ('\\', asm_out_file);                                        \
84
          if (ISPRINT(c))                                                     \
85
            putc (c, asm_out_file);                                           \
86
          else                                                                \
87
            {                                                                 \
88
              fprintf (asm_out_file, "\\%o", c);                              \
89
              /* After an octal-escape, if a digit follows,                   \
90
                 terminate one string constant and start another.             \
91
                 The VAX assembler fails to stop reading the escape           \
92
                 after three digits, so this is the only way we               \
93
                 can get it to parse the data properly.  */                   \
94
              if (i < thissize - 1 && ISDIGIT(p[i + 1]))                      \
95
                fprintf (asm_out_file, "\"\n\t.ascii \"");                    \
96
          }                                                                   \
97
        }                                                                     \
98
      fprintf (asm_out_file, "\"\n");                                         \
99
    }                                                                         \
100
  }                                                                           \
101
  while (0)
102
#endif
103
 
104
/* This is how we tell the assembler to equate two values.  */
105
#ifdef SET_ASM_OP
106
#ifndef ASM_OUTPUT_DEF
107
#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
108
 do {   fprintf ((FILE), "%s", SET_ASM_OP);                             \
109
        assemble_name (FILE, LABEL1);                                   \
110
        fprintf (FILE, ",");                                            \
111
        assemble_name (FILE, LABEL2);                                   \
112
        fprintf (FILE, "\n");                                           \
113
  } while (0)
114
#endif
115
#endif
116
 
117
/* Decide whether to defer emitting the assembler output for an equate
118
   of two values.  The default is to not defer output.  */
119
#ifndef TARGET_DEFERRED_OUTPUT_DEFS
120
#define TARGET_DEFERRED_OUTPUT_DEFS(DECL,TARGET) false
121
#endif
122
 
123
/* This is how to output the definition of a user-level label named
124
   NAME, such as the label on a static function or variable NAME.  */
125
 
126
#ifndef ASM_OUTPUT_LABEL
127
#define ASM_OUTPUT_LABEL(FILE,NAME) \
128
  do { assemble_name ((FILE), (NAME)); fputs (":\n", (FILE)); } while (0)
129
#endif
130
 
131
/* Output the definition of a compiler-generated label named NAME.  */
132
#ifndef ASM_OUTPUT_INTERNAL_LABEL
133
#define ASM_OUTPUT_INTERNAL_LABEL(FILE,NAME)    \
134
  do {                                          \
135
    assemble_name_raw ((FILE), (NAME));         \
136
    fputs (":\n", (FILE));                      \
137
  } while (0)
138
#endif
139
 
140
/* This is how to output a reference to a user-level label named NAME.  */
141
 
142
#ifndef ASM_OUTPUT_LABELREF
143
#define ASM_OUTPUT_LABELREF(FILE,NAME)  asm_fprintf ((FILE), "%U%s", (NAME))
144
#endif
145
 
146
/* Allow target to print debug info labels specially.  This is useful for
147
   VLIW targets, since debug info labels should go into the middle of
148
   instruction bundles instead of breaking them.  */
149
 
150
#ifndef ASM_OUTPUT_DEBUG_LABEL
151
#define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
152
  (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM)
153
#endif
154
 
155
/* This is how we tell the assembler that a symbol is weak.  */
156
#ifndef ASM_OUTPUT_WEAK_ALIAS
157
#if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
158
#define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE)      \
159
  do                                                    \
160
    {                                                   \
161
      ASM_WEAKEN_LABEL (STREAM, NAME);                  \
162
      if (VALUE)                                        \
163
        ASM_OUTPUT_DEF (STREAM, NAME, VALUE);           \
164
    }                                                   \
165
  while (0)
166
#endif
167
#endif
168
 
169
/* This is how we tell the assembler that a symbol is a weak alias to
170
   another symbol that doesn't require the other symbol to be defined.
171
   Uses of the former will turn into weak uses of the latter, i.e.,
172
   uses that, in case the latter is undefined, will not cause errors,
173
   and will add it to the symbol table as weak undefined.  However, if
174
   the latter is referenced directly, a strong reference prevails.  */
175
#ifndef ASM_OUTPUT_WEAKREF
176
#if defined HAVE_GAS_WEAKREF
177
#define ASM_OUTPUT_WEAKREF(FILE, DECL, NAME, VALUE)                     \
178
  do                                                                    \
179
    {                                                                   \
180
      fprintf ((FILE), "\t.weakref\t");                                 \
181
      assemble_name ((FILE), (NAME));                                   \
182
      fprintf ((FILE), ",");                                            \
183
      assemble_name ((FILE), (VALUE));                                  \
184
      fprintf ((FILE), "\n");                                           \
185
    }                                                                   \
186
  while (0)
187
#endif
188
#endif
189
 
190
/* How to emit a .type directive.  */
191
#ifndef ASM_OUTPUT_TYPE_DIRECTIVE
192
#if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT
193
#define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE)   \
194
  do                                                    \
195
    {                                                   \
196
      fputs (TYPE_ASM_OP, STREAM);                      \
197
      assemble_name (STREAM, NAME);                     \
198
      fputs (", ", STREAM);                             \
199
      fprintf (STREAM, TYPE_OPERAND_FMT, TYPE);         \
200
      putc ('\n', STREAM);                              \
201
    }                                                   \
202
  while (0)
203
#endif
204
#endif
205
 
206
/* How to emit a .size directive.  */
207
#ifndef ASM_OUTPUT_SIZE_DIRECTIVE
208
#ifdef SIZE_ASM_OP
209
#define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE)   \
210
  do                                                    \
211
    {                                                   \
212
      HOST_WIDE_INT size_ = (SIZE);                     \
213
      fputs (SIZE_ASM_OP, STREAM);                      \
214
      assemble_name (STREAM, NAME);                     \
215
      fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \
216
    }                                                   \
217
  while (0)
218
 
219
#define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME)          \
220
  do                                                    \
221
    {                                                   \
222
      fputs (SIZE_ASM_OP, STREAM);                      \
223
      assemble_name (STREAM, NAME);                     \
224
      fputs (", .-", STREAM);                           \
225
      assemble_name (STREAM, NAME);                     \
226
      putc ('\n', STREAM);                              \
227
    }                                                   \
228
  while (0)
229
 
230
#endif
231
#endif
232
 
233
/* This determines whether or not we support weak symbols.  */
234
#ifndef SUPPORTS_WEAK
235
#if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
236
#define SUPPORTS_WEAK 1
237
#else
238
#define SUPPORTS_WEAK 0
239
#endif
240
#endif
241
 
242
/* This determines whether or not we support link-once semantics.  */
243
#ifndef SUPPORTS_ONE_ONLY
244
#ifdef MAKE_DECL_ONE_ONLY
245
#define SUPPORTS_ONE_ONLY 1
246
#else
247
#define SUPPORTS_ONE_ONLY 0
248
#endif
249
#endif
250
 
251
/* This determines whether weak symbols must be left out of a static
252
   archive's table of contents.  Defining this macro to be nonzero has
253
   the consequence that certain symbols will not be made weak that
254
   otherwise would be.  The C++ ABI requires this macro to be zero;
255
   see the documentation.  */
256
#ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
257
#define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
258
#endif
259
 
260
/* This determines whether or not we need linkonce unwind information.  */
261
#ifndef TARGET_USES_WEAK_UNWIND_INFO
262
#define TARGET_USES_WEAK_UNWIND_INFO 0
263
#endif
264
 
265
/* By default, there is no prefix on user-defined symbols.  */
266
#ifndef USER_LABEL_PREFIX
267
#define USER_LABEL_PREFIX ""
268
#endif
269
 
270
/* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
271
   provide a weak attribute.  Else define it to nothing.
272
 
273
   This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
274
   not available at that time.
275
 
276
   Note, this is only for use by target files which we know are to be
277
   compiled by GCC.  */
278
#ifndef TARGET_ATTRIBUTE_WEAK
279
# if SUPPORTS_WEAK
280
#  define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
281
# else
282
#  define TARGET_ATTRIBUTE_WEAK
283
# endif
284
#endif
285
 
286
/* Determines whether we may use common symbols to represent one-only
287
   semantics (a.k.a. "vague linkage").  */
288
#ifndef USE_COMMON_FOR_ONE_ONLY
289
# define USE_COMMON_FOR_ONE_ONLY 1
290
#endif
291
 
292
/* By default we can assume that all global symbols are in one namespace,
293
   across all shared libraries.  */
294
#ifndef MULTIPLE_SYMBOL_SPACES
295
# define MULTIPLE_SYMBOL_SPACES 0
296
#endif
297
 
298
/* If the target supports init_priority C++ attribute, give
299
   SUPPORTS_INIT_PRIORITY a nonzero value.  */
300
#ifndef SUPPORTS_INIT_PRIORITY
301
#define SUPPORTS_INIT_PRIORITY 1
302
#endif /* SUPPORTS_INIT_PRIORITY */
303
 
304
/* If duplicate library search directories can be removed from a
305
   linker command without changing the linker's semantics, give this
306
   symbol a nonzero.  */
307
#ifndef LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
308
#define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 0
309
#endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
310
 
311
/* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
312
   the rest of the DWARF 2 frame unwind support is also provided.  */
313
#if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
314
#define DWARF2_UNWIND_INFO 1
315
#endif
316
 
317
/* If we have named sections, and we're using crtstuff to run ctors,
318
   use them for registering eh frame information.  */
319
#if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
320
    && !defined(EH_FRAME_IN_DATA_SECTION)
321
#ifndef EH_FRAME_SECTION_NAME
322
#define EH_FRAME_SECTION_NAME ".eh_frame"
323
#endif
324
#endif
325
 
326
/* On many systems, different EH table encodings are used under
327
   difference circumstances.  Some will require runtime relocations;
328
   some will not.  For those that do not require runtime relocations,
329
   we would like to make the table read-only.  However, since the
330
   read-only tables may need to be combined with read-write tables
331
   that do require runtime relocation, it is not safe to make the
332
   tables read-only unless the linker will merge read-only and
333
   read-write sections into a single read-write section.  If your
334
   linker does not have this ability, but your system is such that no
335
   encoding used with non-PIC code will ever require a runtime
336
   relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in
337
   your target configuration file.  */
338
#ifndef EH_TABLES_CAN_BE_READ_ONLY
339
#ifdef HAVE_LD_RO_RW_SECTION_MIXING
340
#define EH_TABLES_CAN_BE_READ_ONLY 1
341
#else
342
#define EH_TABLES_CAN_BE_READ_ONLY 0
343
#endif
344
#endif
345
 
346
/* If we have named section and we support weak symbols, then use the
347
   .jcr section for recording java classes which need to be registered
348
   at program start-up time.  */
349
#if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
350
#ifndef JCR_SECTION_NAME
351
#define JCR_SECTION_NAME ".jcr"
352
#endif
353
#endif
354
 
355
/* This decision to use a .jcr section can be overridden by defining
356
   USE_JCR_SECTION to 0 in target file.  This is necessary if target
357
   can define JCR_SECTION_NAME but does not have crtstuff or
358
   linker support for .jcr section.  */
359
#ifndef TARGET_USE_JCR_SECTION
360
#ifdef JCR_SECTION_NAME
361
#define TARGET_USE_JCR_SECTION 1
362
#else
363
#define TARGET_USE_JCR_SECTION 0
364
#endif
365
#endif
366
 
367
/* Number of hardware registers that go into the DWARF-2 unwind info.
368
   If not defined, equals FIRST_PSEUDO_REGISTER  */
369
 
370
#ifndef DWARF_FRAME_REGISTERS
371
#define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
372
#endif
373
 
374
/* How to renumber registers for dbx and gdb.  If not defined, assume
375
   no renumbering is necessary.  */
376
 
377
#ifndef DBX_REGISTER_NUMBER
378
#define DBX_REGISTER_NUMBER(REGNO) (REGNO)
379
#endif
380
 
381
/* Default sizes for base C types.  If the sizes are different for
382
   your target, you should override these values by defining the
383
   appropriate symbols in your tm.h file.  */
384
 
385
#ifndef BITS_PER_UNIT
386
#define BITS_PER_UNIT 8
387
#endif
388
 
389
#ifndef BITS_PER_WORD
390
#define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
391
#endif
392
 
393
#ifndef CHAR_TYPE_SIZE
394
#define CHAR_TYPE_SIZE BITS_PER_UNIT
395
#endif
396
 
397
#ifndef BOOL_TYPE_SIZE
398
/* `bool' has size and alignment `1', on almost all platforms.  */
399
#define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
400
#endif
401
 
402
#ifndef SHORT_TYPE_SIZE
403
#define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
404
#endif
405
 
406
#ifndef INT_TYPE_SIZE
407
#define INT_TYPE_SIZE BITS_PER_WORD
408
#endif
409
 
410
#ifndef LONG_TYPE_SIZE
411
#define LONG_TYPE_SIZE BITS_PER_WORD
412
#endif
413
 
414
#ifndef LONG_LONG_TYPE_SIZE
415
#define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
416
#endif
417
 
418
#ifndef WCHAR_TYPE_SIZE
419
#define WCHAR_TYPE_SIZE INT_TYPE_SIZE
420
#endif
421
 
422
#ifndef FLOAT_TYPE_SIZE
423
#define FLOAT_TYPE_SIZE BITS_PER_WORD
424
#endif
425
 
426
#ifndef DOUBLE_TYPE_SIZE
427
#define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
428
#endif
429
 
430
#ifndef LONG_DOUBLE_TYPE_SIZE
431
#define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
432
#endif
433
 
434
/* Width in bits of a pointer.  Mind the value of the macro `Pmode'.  */
435
#ifndef POINTER_SIZE
436
#define POINTER_SIZE BITS_PER_WORD
437
#endif
438
 
439
#ifndef PIC_OFFSET_TABLE_REGNUM
440
#define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
441
#endif
442
 
443
#ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
444
#define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
445
#endif
446
 
447
#ifndef TARGET_DECLSPEC
448
#if TARGET_DLLIMPORT_DECL_ATTRIBUTES
449
/* If the target supports the "dllimport" attribute, users are
450
   probably used to the "__declspec" syntax.  */
451
#define TARGET_DECLSPEC 1
452
#else
453
#define TARGET_DECLSPEC 0
454
#endif
455
#endif
456
 
457
/* By default, the preprocessor should be invoked the same way in C++
458
   as in C.  */
459
#ifndef CPLUSPLUS_CPP_SPEC
460
#ifdef CPP_SPEC
461
#define CPLUSPLUS_CPP_SPEC CPP_SPEC
462
#endif
463
#endif
464
 
465
#ifndef ACCUMULATE_OUTGOING_ARGS
466
#define ACCUMULATE_OUTGOING_ARGS 0
467
#endif
468
 
469
/* Supply a default definition for PUSH_ARGS.  */
470
#ifndef PUSH_ARGS
471
#ifdef PUSH_ROUNDING
472
#define PUSH_ARGS       !ACCUMULATE_OUTGOING_ARGS
473
#else
474
#define PUSH_ARGS       0
475
#endif
476
#endif
477
 
478
/* Decide whether a function's arguments should be processed
479
   from first to last or from last to first.
480
 
481
   They should if the stack and args grow in opposite directions, but
482
   only if we have push insns.  */
483
 
484
#ifdef PUSH_ROUNDING
485
 
486
#ifndef PUSH_ARGS_REVERSED
487
#if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
488
#define PUSH_ARGS_REVERSED  PUSH_ARGS
489
#endif
490
#endif
491
 
492
#endif
493
 
494
#ifndef PUSH_ARGS_REVERSED
495
#define PUSH_ARGS_REVERSED 0
496
#endif
497
 
498
/* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
499
   STACK_BOUNDARY is required.  */
500
#ifndef PREFERRED_STACK_BOUNDARY
501
#define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
502
#endif
503
 
504
#ifndef TARGET_DEFAULT_PACK_STRUCT
505
#define TARGET_DEFAULT_PACK_STRUCT 0
506
#endif
507
 
508
/* By default, the C++ compiler will use function addresses in the
509
   vtable entries.  Setting this nonzero tells the compiler to use
510
   function descriptors instead.  The value of this macro says how
511
   many words wide the descriptor is (normally 2).  It is assumed
512
   that the address of a function descriptor may be treated as a
513
   pointer to a function.  */
514
#ifndef TARGET_VTABLE_USES_DESCRIPTORS
515
#define TARGET_VTABLE_USES_DESCRIPTORS 0
516
#endif
517
 
518
/* By default, the vtable entries are void pointers, the so the alignment
519
   is the same as pointer alignment.  The value of this macro specifies
520
   the alignment of the vtable entry in bits.  It should be defined only
521
   when special alignment is necessary.  */
522
#ifndef TARGET_VTABLE_ENTRY_ALIGN
523
#define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
524
#endif
525
 
526
/* There are a few non-descriptor entries in the vtable at offsets below
527
   zero.  If these entries must be padded (say, to preserve the alignment
528
   specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
529
   words in each data entry.  */
530
#ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
531
#define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
532
#endif
533
 
534
/* Decide whether it is safe to use a local alias for a virtual function
535
   when constructing thunks.  */
536
#ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
537
#ifdef ASM_OUTPUT_DEF
538
#define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
539
#else
540
#define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
541
#endif
542
#endif
543
 
544
/* Select a format to encode pointers in exception handling data.  We
545
   prefer those that result in fewer dynamic relocations.  Assume no
546
   special support here and encode direct references.  */
547
#ifndef ASM_PREFERRED_EH_DATA_FORMAT
548
#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  DW_EH_PE_absptr
549
#endif
550
 
551
/* By default, the C++ compiler will use the lowest bit of the pointer
552
   to function to indicate a pointer-to-member-function points to a
553
   virtual member function.  However, if FUNCTION_BOUNDARY indicates
554
   function addresses aren't always even, the lowest bit of the delta
555
   field will be used.  */
556
#ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
557
#define TARGET_PTRMEMFUNC_VBIT_LOCATION \
558
  (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
559
   ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
560
#endif
561
 
562
#ifndef DEFAULT_GDB_EXTENSIONS
563
#define DEFAULT_GDB_EXTENSIONS 1
564
#endif
565
 
566
/* If more than one debugging type is supported, you must define
567
   PREFERRED_DEBUGGING_TYPE to choose the default.  */
568
 
569
#if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
570
         + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
571
         + defined (VMS_DEBUGGING_INFO))
572
#ifndef PREFERRED_DEBUGGING_TYPE
573
#error You must define PREFERRED_DEBUGGING_TYPE
574
#endif /* no PREFERRED_DEBUGGING_TYPE */
575
 
576
/* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
577
   here so other code needn't care.  */
578
#elif defined DBX_DEBUGGING_INFO
579
#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
580
 
581
#elif defined SDB_DEBUGGING_INFO
582
#define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
583
 
584
#elif defined DWARF2_DEBUGGING_INFO
585
#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
586
 
587
#elif defined VMS_DEBUGGING_INFO
588
#define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
589
 
590
#elif defined XCOFF_DEBUGGING_INFO
591
#define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
592
 
593
#else
594
/* No debugging format is supported by this target.  */
595
#define PREFERRED_DEBUGGING_TYPE NO_DEBUG
596
#endif
597
 
598
/* Define codes for all the float formats that we know of.  */
599
#define UNKNOWN_FLOAT_FORMAT 0
600
#define IEEE_FLOAT_FORMAT 1
601
#define VAX_FLOAT_FORMAT 2
602
#define IBM_FLOAT_FORMAT 3
603
#define C4X_FLOAT_FORMAT 4
604
 
605
/* Default to IEEE float if not specified.  Nearly all machines use it.  */
606
#ifndef TARGET_FLOAT_FORMAT
607
#define TARGET_FLOAT_FORMAT     IEEE_FLOAT_FORMAT
608
#endif
609
 
610
/* Some macros can be defined by the backend in either a mode-dependent
611
   or mode-independent form.  The compiler proper should only use the
612
   mode-dependent form, providing VOIDmode when the mode is unknown.
613
   We can't poison the macros because the backend may reference them.  */
614
 
615
#ifndef REGNO_MODE_OK_FOR_BASE_P
616
#define REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) REGNO_OK_FOR_BASE_P (REGNO)
617
#endif
618
 
619
#ifndef REG_MODE_OK_FOR_BASE_P
620
#define REG_MODE_OK_FOR_BASE_P(REG, MODE) REG_OK_FOR_BASE_P (REG)
621
#endif
622
 
623
/* Determine the register class for registers suitable to be the base
624
   address register in a MEM.  Allow the choice to be dependent upon
625
   the mode of the memory access.  */
626
#ifndef MODE_BASE_REG_CLASS
627
#define MODE_BASE_REG_CLASS(MODE) BASE_REG_CLASS
628
#endif
629
 
630
/* Some machines require a different base register class if the index
631
   is a register.  By default, assume that a base register is acceptable.  */
632
#ifndef MODE_BASE_REG_REG_CLASS
633
#define MODE_BASE_REG_REG_CLASS(MODE) MODE_BASE_REG_CLASS(MODE)
634
#endif
635
 
636
#ifndef REGNO_MODE_OK_FOR_REG_BASE_P
637
#define REGNO_MODE_OK_FOR_REG_BASE_P(REGNO, MODE) REGNO_MODE_OK_FOR_BASE_P (REGNO, MODE)
638
#endif
639
 
640
#ifndef REG_MODE_OK_FOR_REG_BASE_P
641
#define REG_MODE_OK_FOR_REG_BASE_P(REGNO, MODE) REG_MODE_OK_FOR_BASE_P (REGNO, MODE)
642
#endif
643
 
644
#ifndef LARGEST_EXPONENT_IS_NORMAL
645
#define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
646
#endif
647
 
648
#ifndef ROUND_TOWARDS_ZERO
649
#define ROUND_TOWARDS_ZERO 0
650
#endif
651
 
652
#ifndef MODE_HAS_NANS
653
#define MODE_HAS_NANS(MODE)                                     \
654
  (FLOAT_MODE_P (MODE)                                          \
655
   && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT                  \
656
   && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
657
#endif
658
 
659
#ifndef MODE_HAS_INFINITIES
660
#define MODE_HAS_INFINITIES(MODE)                               \
661
  (FLOAT_MODE_P (MODE)                                          \
662
   && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT                  \
663
   && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
664
#endif
665
 
666
#ifndef MODE_HAS_SIGNED_ZEROS
667
#define MODE_HAS_SIGNED_ZEROS(MODE) \
668
  (FLOAT_MODE_P (MODE) && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT)
669
#endif
670
 
671
#ifndef MODE_HAS_SIGN_DEPENDENT_ROUNDING
672
#define MODE_HAS_SIGN_DEPENDENT_ROUNDING(MODE)                  \
673
  (FLOAT_MODE_P (MODE)                                          \
674
   && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT                  \
675
   && !ROUND_TOWARDS_ZERO)
676
#endif
677
 
678
#ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
679
#define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
680
#endif
681
 
682
/* True if the targets integer-comparison functions return { 0, 1, 2
683
   } to indicate { <, ==, > }.  False if { -1, 0, 1 } is used
684
   instead.  The libgcc routines are biased.  */
685
#ifndef TARGET_LIB_INT_CMP_BIASED
686
#define TARGET_LIB_INT_CMP_BIASED (true)
687
#endif
688
 
689
/* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
690
   then the word-endianness is the same as for integers.  */
691
#ifndef FLOAT_WORDS_BIG_ENDIAN
692
#define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
693
#endif
694
 
695
#ifndef TARGET_FLT_EVAL_METHOD
696
#define TARGET_FLT_EVAL_METHOD 0
697
#endif
698
 
699
#ifndef HOT_TEXT_SECTION_NAME
700
#define HOT_TEXT_SECTION_NAME ".text.hot"
701
#endif
702
 
703
#ifndef UNLIKELY_EXECUTED_TEXT_SECTION_NAME
704
#define UNLIKELY_EXECUTED_TEXT_SECTION_NAME ".text.unlikely"
705
#endif
706
 
707
#ifndef HAS_LONG_COND_BRANCH
708
#define HAS_LONG_COND_BRANCH 0
709
#endif
710
 
711
#ifndef HAS_LONG_UNCOND_BRANCH
712
#define HAS_LONG_UNCOND_BRANCH 0
713
#endif
714
 
715
/* By default, only attempt to parallelize bitwise operations, and
716
   possibly adds/subtracts using bit-twiddling.  */
717
#ifndef UNITS_PER_SIMD_WORD
718
#define UNITS_PER_SIMD_WORD UNITS_PER_WORD
719
#endif
720
 
721
/* Determine whether __cxa_atexit, rather than atexit, is used to
722
   register C++ destructors for local statics and global objects.  */
723
#ifndef DEFAULT_USE_CXA_ATEXIT
724
#define DEFAULT_USE_CXA_ATEXIT 0
725
#endif
726
 
727
/* Determine whether extra constraint letter should be handled
728
   via address reload (like 'o').  */
729
#ifndef EXTRA_MEMORY_CONSTRAINT
730
#define EXTRA_MEMORY_CONSTRAINT(C,STR) 0
731
#endif
732
 
733
/* Determine whether extra constraint letter should be handled
734
   as an address (like 'p').  */
735
#ifndef EXTRA_ADDRESS_CONSTRAINT
736
#define EXTRA_ADDRESS_CONSTRAINT(C,STR) 0
737
#endif
738
 
739
/* When a port defines CONSTRAINT_LEN, it should use DEFAULT_CONSTRAINT_LEN
740
   for all the characters that it does not want to change, so things like the
741
  'length' of a digit in a matching constraint is an implementation detail,
742
   and not part of the interface.  */
743
#define DEFAULT_CONSTRAINT_LEN(C,STR) 1
744
 
745
#ifndef CONSTRAINT_LEN
746
#define CONSTRAINT_LEN(C,STR) DEFAULT_CONSTRAINT_LEN (C, STR)
747
#endif
748
 
749
#if defined (CONST_OK_FOR_LETTER_P) && ! defined (CONST_OK_FOR_CONSTRAINT_P)
750
#define CONST_OK_FOR_CONSTRAINT_P(VAL,C,STR) CONST_OK_FOR_LETTER_P (VAL, C)
751
#endif
752
 
753
#if defined (CONST_DOUBLE_OK_FOR_LETTER_P) && ! defined (CONST_DOUBLE_OK_FOR_CONSTRAINT_P)
754
#define CONST_DOUBLE_OK_FOR_CONSTRAINT_P(OP,C,STR) \
755
  CONST_DOUBLE_OK_FOR_LETTER_P (OP, C)
756
#endif
757
 
758
#ifndef REG_CLASS_FROM_CONSTRAINT
759
#define REG_CLASS_FROM_CONSTRAINT(C,STR) REG_CLASS_FROM_LETTER (C)
760
#endif
761
 
762
#if defined (EXTRA_CONSTRAINT) && ! defined (EXTRA_CONSTRAINT_STR)
763
#define EXTRA_CONSTRAINT_STR(OP, C,STR) EXTRA_CONSTRAINT (OP, C)
764
#endif
765
 
766
#ifndef REGISTER_MOVE_COST
767
#define REGISTER_MOVE_COST(m, x, y) 2
768
#endif
769
 
770
/* Determine whether the entire c99 runtime
771
   is present in the runtime library.  */
772
#ifndef TARGET_C99_FUNCTIONS
773
#define TARGET_C99_FUNCTIONS 0
774
#endif
775
 
776
/* Indicate that CLZ and CTZ are undefined at zero.  */
777
#ifndef CLZ_DEFINED_VALUE_AT_ZERO
778
#define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
779
#endif
780
#ifndef CTZ_DEFINED_VALUE_AT_ZERO
781
#define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
782
#endif
783
 
784
/* Provide a default value for STORE_FLAG_VALUE.  */
785
#ifndef STORE_FLAG_VALUE
786
#define STORE_FLAG_VALUE  1
787
#endif
788
 
789
/* This macro is used to determine what the largest unit size that
790
   move_by_pieces can use is.  */
791
 
792
/* MOVE_MAX_PIECES is the number of bytes at a time which we can
793
   move efficiently, as opposed to  MOVE_MAX which is the maximum
794
   number of bytes we can move with a single instruction.  */
795
 
796
#ifndef MOVE_MAX_PIECES
797
#define MOVE_MAX_PIECES   MOVE_MAX
798
#endif
799
 
800
#ifndef STACK_POINTER_OFFSET
801
#define STACK_POINTER_OFFSET    0
802
#endif
803
 
804
#ifndef LOCAL_REGNO
805
#define LOCAL_REGNO(REGNO)  0
806
#endif
807
 
808
/* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
809
   the stack pointer does not matter.  The value is tested only in
810
   functions that have frame pointers.  */
811
#ifndef EXIT_IGNORE_STACK
812
#define EXIT_IGNORE_STACK 0
813
#endif
814
 
815
/* Assume that case vectors are not pc-relative.  */
816
#ifndef CASE_VECTOR_PC_RELATIVE
817
#define CASE_VECTOR_PC_RELATIVE 0
818
#endif
819
 
820
/* Assume that trampolines need function alignment.  */
821
#ifndef TRAMPOLINE_ALIGNMENT
822
#define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY
823
#endif
824
 
825
/* Register mappings for target machines without register windows.  */
826
#ifndef INCOMING_REGNO
827
#define INCOMING_REGNO(N) (N)
828
#endif
829
 
830
#ifndef OUTGOING_REGNO
831
#define OUTGOING_REGNO(N) (N)
832
#endif
833
 
834
#ifndef SHIFT_COUNT_TRUNCATED
835
#define SHIFT_COUNT_TRUNCATED 0
836
#endif
837
 
838
#ifndef LEGITIMIZE_ADDRESS
839
#define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)
840
#endif
841
 
842
#ifndef LEGITIMATE_PIC_OPERAND_P
843
#define LEGITIMATE_PIC_OPERAND_P(X) 1
844
#endif
845
 
846
#ifndef REVERSIBLE_CC_MODE
847
#define REVERSIBLE_CC_MODE(MODE) 0
848
#endif
849
 
850
/* Biggest alignment supported by the object file format of this machine.  */
851
#ifndef MAX_OFILE_ALIGNMENT
852
#define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
853
#endif
854
 
855
#ifndef FRAME_GROWS_DOWNWARD
856
#define FRAME_GROWS_DOWNWARD 0
857
#endif
858
 
859
/* On most machines, the CFA coincides with the first incoming parm.  */
860
#ifndef ARG_POINTER_CFA_OFFSET
861
#define ARG_POINTER_CFA_OFFSET(FNDECL) FIRST_PARM_OFFSET (FNDECL)
862
#endif
863
 
864
/* The offset from the incoming value of %sp to the top of the stack frame
865
   for the current function.  */
866
#ifndef INCOMING_FRAME_SP_OFFSET
867
#define INCOMING_FRAME_SP_OFFSET 0
868
#endif
869
 
870
#endif  /* ! GCC_DEFAULTS_H */

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