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1 38 julius
/* Definitions of various defaults for tm.h macros.
2
   Copyright (C) 1992, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
3
   2005, 2007
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 3, 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 COPYING3.  If not see
21
<http://www.gnu.org/licenses/>.  */
22
 
23
#ifndef GCC_DEFAULTS_H
24
#define GCC_DEFAULTS_H
25
 
26
#ifndef GET_ENVIRONMENT
27
#define GET_ENVIRONMENT(VALUE, NAME) do { (VALUE) = getenv (NAME); } while (0)
28
#endif
29
 
30
#define obstack_chunk_alloc     ((void *(*) (long)) xmalloc)
31
#define obstack_chunk_free      ((void (*) (void *)) free)
32
#define OBSTACK_CHUNK_SIZE      0
33
#define gcc_obstack_init(OBSTACK)                       \
34
  _obstack_begin ((OBSTACK), OBSTACK_CHUNK_SIZE, 0,      \
35
                  obstack_chunk_alloc,                  \
36
                  obstack_chunk_free)
37
 
38
/* Store in OUTPUT a string (made with alloca) containing an
39
   assembler-name for a local static variable or function named NAME.
40
   LABELNO is an integer which is different for each call.  */
41
 
42
#ifndef ASM_PN_FORMAT
43
# ifndef NO_DOT_IN_LABEL
44
#  define ASM_PN_FORMAT "%s.%lu"
45
# else
46
#  ifndef NO_DOLLAR_IN_LABEL
47
#   define ASM_PN_FORMAT "%s$%lu"
48
#  else
49
#   define ASM_PN_FORMAT "__%s_%lu"
50
#  endif
51
# endif
52
#endif /* ! ASM_PN_FORMAT */
53
 
54
#ifndef ASM_FORMAT_PRIVATE_NAME
55
# define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
56
  do { const char *const name_ = (NAME); \
57
       char *const output_ = (OUTPUT) = \
58
         (char *) alloca (strlen (name_) + 32); \
59
       sprintf (output_, ASM_PN_FORMAT, name_, (unsigned long)(LABELNO)); \
60
  } while (0)
61
#endif
62
 
63
/* Choose a reasonable default for ASM_OUTPUT_ASCII.  */
64
 
65
#ifndef ASM_OUTPUT_ASCII
66
#define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
67
  do {                                                                        \
68
    FILE *_hide_asm_out_file = (MYFILE);                                      \
69
    const unsigned char *_hide_p = (const unsigned char *) (MYSTRING);        \
70
    int _hide_thissize = (MYLENGTH);                                          \
71
    {                                                                         \
72
      FILE *asm_out_file = _hide_asm_out_file;                                \
73
      const unsigned char *p = _hide_p;                                       \
74
      int thissize = _hide_thissize;                                          \
75
      int i;                                                                  \
76
      fprintf (asm_out_file, "\t.ascii \"");                                  \
77
                                                                              \
78
      for (i = 0; i < thissize; i++)                                           \
79
        {                                                                     \
80
          int c = p[i];                                                       \
81
          if (c == '\"' || c == '\\')                                         \
82
            putc ('\\', asm_out_file);                                        \
83
          if (ISPRINT(c))                                                     \
84
            putc (c, asm_out_file);                                           \
85
          else                                                                \
86
            {                                                                 \
87
              fprintf (asm_out_file, "\\%o", c);                              \
88
              /* After an octal-escape, if a digit follows,                   \
89
                 terminate one string constant and start another.             \
90
                 The VAX assembler fails to stop reading the escape           \
91
                 after three digits, so this is the only way we               \
92
                 can get it to parse the data properly.  */                   \
93
              if (i < thissize - 1 && ISDIGIT(p[i + 1]))                      \
94
                fprintf (asm_out_file, "\"\n\t.ascii \"");                    \
95
          }                                                                   \
96
        }                                                                     \
97
      fprintf (asm_out_file, "\"\n");                                         \
98
    }                                                                         \
99
  }                                                                           \
100
  while (0)
101
#endif
102
 
103
/* This is how we tell the assembler to equate two values.  */
104
#ifdef SET_ASM_OP
105
#ifndef ASM_OUTPUT_DEF
106
#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
107
 do {   fprintf ((FILE), "%s", SET_ASM_OP);                             \
108
        assemble_name (FILE, LABEL1);                                   \
109
        fprintf (FILE, ",");                                            \
110
        assemble_name (FILE, LABEL2);                                   \
111
        fprintf (FILE, "\n");                                           \
112
  } while (0)
113
#endif
114
#endif
115
 
116
#if defined (HAVE_AS_TLS) && !defined (ASM_OUTPUT_TLS_COMMON)
117
#define ASM_OUTPUT_TLS_COMMON(FILE, DECL, NAME, SIZE)                   \
118
  do                                                                    \
119
    {                                                                   \
120
      fprintf ((FILE), "\t.tls_common\t");                              \
121
      assemble_name ((FILE), (NAME));                                   \
122
      fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n",          \
123
               (SIZE), DECL_ALIGN (DECL) / BITS_PER_UNIT);              \
124
    }                                                                   \
125
  while (0)
126
#endif
127
 
128
/* Decide whether to defer emitting the assembler output for an equate
129
   of two values.  The default is to not defer output.  */
130
#ifndef TARGET_DEFERRED_OUTPUT_DEFS
131
#define TARGET_DEFERRED_OUTPUT_DEFS(DECL,TARGET) false
132
#endif
133
 
134
/* This is how to output the definition of a user-level label named
135
   NAME, such as the label on a static function or variable NAME.  */
136
 
137
#ifndef ASM_OUTPUT_LABEL
138
#define ASM_OUTPUT_LABEL(FILE,NAME) \
139
  do { assemble_name ((FILE), (NAME)); fputs (":\n", (FILE)); } while (0)
140
#endif
141
 
142
/* Output the definition of a compiler-generated label named NAME.  */
143
#ifndef ASM_OUTPUT_INTERNAL_LABEL
144
#define ASM_OUTPUT_INTERNAL_LABEL(FILE,NAME)    \
145
  do {                                          \
146
    assemble_name_raw ((FILE), (NAME));         \
147
    fputs (":\n", (FILE));                      \
148
  } while (0)
149
#endif
150
 
151
/* This is how to output a reference to a user-level label named NAME.  */
152
 
153
#ifndef ASM_OUTPUT_LABELREF
154
#define ASM_OUTPUT_LABELREF(FILE,NAME)  asm_fprintf ((FILE), "%U%s", (NAME))
155
#endif
156
 
157
/* Allow target to print debug info labels specially.  This is useful for
158
   VLIW targets, since debug info labels should go into the middle of
159
   instruction bundles instead of breaking them.  */
160
 
161
#ifndef ASM_OUTPUT_DEBUG_LABEL
162
#define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
163
  (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM)
164
#endif
165
 
166
/* This is how we tell the assembler that a symbol is weak.  */
167
#ifndef ASM_OUTPUT_WEAK_ALIAS
168
#if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
169
#define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE)      \
170
  do                                                    \
171
    {                                                   \
172
      ASM_WEAKEN_LABEL (STREAM, NAME);                  \
173
      if (VALUE)                                        \
174
        ASM_OUTPUT_DEF (STREAM, NAME, VALUE);           \
175
    }                                                   \
176
  while (0)
177
#endif
178
#endif
179
 
180
/* This is how we tell the assembler that a symbol is a weak alias to
181
   another symbol that doesn't require the other symbol to be defined.
182
   Uses of the former will turn into weak uses of the latter, i.e.,
183
   uses that, in case the latter is undefined, will not cause errors,
184
   and will add it to the symbol table as weak undefined.  However, if
185
   the latter is referenced directly, a strong reference prevails.  */
186
#ifndef ASM_OUTPUT_WEAKREF
187
#if defined HAVE_GAS_WEAKREF
188
#define ASM_OUTPUT_WEAKREF(FILE, DECL, NAME, VALUE)                     \
189
  do                                                                    \
190
    {                                                                   \
191
      fprintf ((FILE), "\t.weakref\t");                                 \
192
      assemble_name ((FILE), (NAME));                                   \
193
      fprintf ((FILE), ",");                                            \
194
      assemble_name ((FILE), (VALUE));                                  \
195
      fprintf ((FILE), "\n");                                           \
196
    }                                                                   \
197
  while (0)
198
#endif
199
#endif
200
 
201
/* How to emit a .type directive.  */
202
#ifndef ASM_OUTPUT_TYPE_DIRECTIVE
203
#if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT
204
#define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE)   \
205
  do                                                    \
206
    {                                                   \
207
      fputs (TYPE_ASM_OP, STREAM);                      \
208
      assemble_name (STREAM, NAME);                     \
209
      fputs (", ", STREAM);                             \
210
      fprintf (STREAM, TYPE_OPERAND_FMT, TYPE);         \
211
      putc ('\n', STREAM);                              \
212
    }                                                   \
213
  while (0)
214
#endif
215
#endif
216
 
217
/* How to emit a .size directive.  */
218
#ifndef ASM_OUTPUT_SIZE_DIRECTIVE
219
#ifdef SIZE_ASM_OP
220
#define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE)   \
221
  do                                                    \
222
    {                                                   \
223
      HOST_WIDE_INT size_ = (SIZE);                     \
224
      fputs (SIZE_ASM_OP, STREAM);                      \
225
      assemble_name (STREAM, NAME);                     \
226
      fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_); \
227
    }                                                   \
228
  while (0)
229
 
230
#define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME)          \
231
  do                                                    \
232
    {                                                   \
233
      fputs (SIZE_ASM_OP, STREAM);                      \
234
      assemble_name (STREAM, NAME);                     \
235
      fputs (", .-", STREAM);                           \
236
      assemble_name (STREAM, NAME);                     \
237
      putc ('\n', STREAM);                              \
238
    }                                                   \
239
  while (0)
240
 
241
#endif
242
#endif
243
 
244
/* This determines whether or not we support weak symbols.  */
245
#ifndef SUPPORTS_WEAK
246
#if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
247
#define SUPPORTS_WEAK 1
248
#else
249
#define SUPPORTS_WEAK 0
250
#endif
251
#endif
252
 
253
/* This determines whether or not we support link-once semantics.  */
254
#ifndef SUPPORTS_ONE_ONLY
255
#ifdef MAKE_DECL_ONE_ONLY
256
#define SUPPORTS_ONE_ONLY 1
257
#else
258
#define SUPPORTS_ONE_ONLY 0
259
#endif
260
#endif
261
 
262
/* This determines whether weak symbols must be left out of a static
263
   archive's table of contents.  Defining this macro to be nonzero has
264
   the consequence that certain symbols will not be made weak that
265
   otherwise would be.  The C++ ABI requires this macro to be zero;
266
   see the documentation.  */
267
#ifndef TARGET_WEAK_NOT_IN_ARCHIVE_TOC
268
#define TARGET_WEAK_NOT_IN_ARCHIVE_TOC 0
269
#endif
270
 
271
/* This determines whether or not we need linkonce unwind information.  */
272
#ifndef TARGET_USES_WEAK_UNWIND_INFO
273
#define TARGET_USES_WEAK_UNWIND_INFO 0
274
#endif
275
 
276
/* By default, there is no prefix on user-defined symbols.  */
277
#ifndef USER_LABEL_PREFIX
278
#define USER_LABEL_PREFIX ""
279
#endif
280
 
281
/* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
282
   provide a weak attribute.  Else define it to nothing.
283
 
284
   This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
285
   not available at that time.
286
 
287
   Note, this is only for use by target files which we know are to be
288
   compiled by GCC.  */
289
#ifndef TARGET_ATTRIBUTE_WEAK
290
# if SUPPORTS_WEAK
291
#  define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
292
# else
293
#  define TARGET_ATTRIBUTE_WEAK
294
# endif
295
#endif
296
 
297
/* Determines whether we may use common symbols to represent one-only
298
   semantics (a.k.a. "vague linkage").  */
299
#ifndef USE_COMMON_FOR_ONE_ONLY
300
# define USE_COMMON_FOR_ONE_ONLY 1
301
#endif
302
 
303
/* By default we can assume that all global symbols are in one namespace,
304
   across all shared libraries.  */
305
#ifndef MULTIPLE_SYMBOL_SPACES
306
# define MULTIPLE_SYMBOL_SPACES 0
307
#endif
308
 
309
/* If the target supports init_priority C++ attribute, give
310
   SUPPORTS_INIT_PRIORITY a nonzero value.  */
311
#ifndef SUPPORTS_INIT_PRIORITY
312
#define SUPPORTS_INIT_PRIORITY 1
313
#endif /* SUPPORTS_INIT_PRIORITY */
314
 
315
/* If duplicate library search directories can be removed from a
316
   linker command without changing the linker's semantics, give this
317
   symbol a nonzero.  */
318
#ifndef LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
319
#define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 0
320
#endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
321
 
322
/* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
323
   the rest of the DWARF 2 frame unwind support is also provided.  */
324
#if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
325
#define DWARF2_UNWIND_INFO 1
326
#endif
327
 
328
/* If we have named sections, and we're using crtstuff to run ctors,
329
   use them for registering eh frame information.  */
330
#if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
331
    && !defined(EH_FRAME_IN_DATA_SECTION)
332
#ifndef EH_FRAME_SECTION_NAME
333
#define EH_FRAME_SECTION_NAME ".eh_frame"
334
#endif
335
#endif
336
 
337
/* On many systems, different EH table encodings are used under
338
   difference circumstances.  Some will require runtime relocations;
339
   some will not.  For those that do not require runtime relocations,
340
   we would like to make the table read-only.  However, since the
341
   read-only tables may need to be combined with read-write tables
342
   that do require runtime relocation, it is not safe to make the
343
   tables read-only unless the linker will merge read-only and
344
   read-write sections into a single read-write section.  If your
345
   linker does not have this ability, but your system is such that no
346
   encoding used with non-PIC code will ever require a runtime
347
   relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in
348
   your target configuration file.  */
349
#ifndef EH_TABLES_CAN_BE_READ_ONLY
350
#ifdef HAVE_LD_RO_RW_SECTION_MIXING
351
#define EH_TABLES_CAN_BE_READ_ONLY 1
352
#else
353
#define EH_TABLES_CAN_BE_READ_ONLY 0
354
#endif
355
#endif
356
 
357
/* If we have named section and we support weak symbols, then use the
358
   .jcr section for recording java classes which need to be registered
359
   at program start-up time.  */
360
#if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
361
#ifndef JCR_SECTION_NAME
362
#define JCR_SECTION_NAME ".jcr"
363
#endif
364
#endif
365
 
366
/* This decision to use a .jcr section can be overridden by defining
367
   USE_JCR_SECTION to 0 in target file.  This is necessary if target
368
   can define JCR_SECTION_NAME but does not have crtstuff or
369
   linker support for .jcr section.  */
370
#ifndef TARGET_USE_JCR_SECTION
371
#ifdef JCR_SECTION_NAME
372
#define TARGET_USE_JCR_SECTION 1
373
#else
374
#define TARGET_USE_JCR_SECTION 0
375
#endif
376
#endif
377
 
378
/* Number of hardware registers that go into the DWARF-2 unwind info.
379
   If not defined, equals FIRST_PSEUDO_REGISTER  */
380
 
381
#ifndef DWARF_FRAME_REGISTERS
382
#define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
383
#endif
384
 
385
/* How to renumber registers for dbx and gdb.  If not defined, assume
386
   no renumbering is necessary.  */
387
 
388
#ifndef DBX_REGISTER_NUMBER
389
#define DBX_REGISTER_NUMBER(REGNO) (REGNO)
390
#endif
391
 
392
/* Default sizes for base C types.  If the sizes are different for
393
   your target, you should override these values by defining the
394
   appropriate symbols in your tm.h file.  */
395
 
396
#ifndef BITS_PER_UNIT
397
#define BITS_PER_UNIT 8
398
#endif
399
 
400
#ifndef BITS_PER_WORD
401
#define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
402
#endif
403
 
404
#ifndef CHAR_TYPE_SIZE
405
#define CHAR_TYPE_SIZE BITS_PER_UNIT
406
#endif
407
 
408
#ifndef BOOL_TYPE_SIZE
409
/* `bool' has size and alignment `1', on almost all platforms.  */
410
#define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
411
#endif
412
 
413
#ifndef SHORT_TYPE_SIZE
414
#define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
415
#endif
416
 
417
#ifndef INT_TYPE_SIZE
418
#define INT_TYPE_SIZE BITS_PER_WORD
419
#endif
420
 
421
#ifndef LONG_TYPE_SIZE
422
#define LONG_TYPE_SIZE BITS_PER_WORD
423
#endif
424
 
425
#ifndef LONG_LONG_TYPE_SIZE
426
#define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
427
#endif
428
 
429
#ifndef WCHAR_TYPE_SIZE
430
#define WCHAR_TYPE_SIZE INT_TYPE_SIZE
431
#endif
432
 
433
#ifndef FLOAT_TYPE_SIZE
434
#define FLOAT_TYPE_SIZE BITS_PER_WORD
435
#endif
436
 
437
#ifndef DOUBLE_TYPE_SIZE
438
#define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
439
#endif
440
 
441
#ifndef LONG_DOUBLE_TYPE_SIZE
442
#define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
443
#endif
444
 
445
#ifndef DECIMAL32_TYPE_SIZE
446
#define DECIMAL32_TYPE_SIZE 32
447
#endif 
448
 
449
#ifndef DECIMAL64_TYPE_SIZE 
450
#define DECIMAL64_TYPE_SIZE 64
451
#endif 
452
 
453
#ifndef DECIMAL128_TYPE_SIZE
454
#define DECIMAL128_TYPE_SIZE 128
455
#endif
456
 
457
/* Width in bits of a pointer.  Mind the value of the macro `Pmode'.  */
458
#ifndef POINTER_SIZE
459
#define POINTER_SIZE BITS_PER_WORD
460
#endif
461
 
462
#ifndef PIC_OFFSET_TABLE_REGNUM
463
#define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
464
#endif
465
 
466
#ifndef TARGET_DLLIMPORT_DECL_ATTRIBUTES
467
#define TARGET_DLLIMPORT_DECL_ATTRIBUTES 0
468
#endif
469
 
470
#ifndef TARGET_DECLSPEC
471
#if TARGET_DLLIMPORT_DECL_ATTRIBUTES
472
/* If the target supports the "dllimport" attribute, users are
473
   probably used to the "__declspec" syntax.  */
474
#define TARGET_DECLSPEC 1
475
#else
476
#define TARGET_DECLSPEC 0
477
#endif
478
#endif
479
 
480
/* By default, the preprocessor should be invoked the same way in C++
481
   as in C.  */
482
#ifndef CPLUSPLUS_CPP_SPEC
483
#ifdef CPP_SPEC
484
#define CPLUSPLUS_CPP_SPEC CPP_SPEC
485
#endif
486
#endif
487
 
488
#ifndef ACCUMULATE_OUTGOING_ARGS
489
#define ACCUMULATE_OUTGOING_ARGS 0
490
#endif
491
 
492
/* Supply a default definition for PUSH_ARGS.  */
493
#ifndef PUSH_ARGS
494
#ifdef PUSH_ROUNDING
495
#define PUSH_ARGS       !ACCUMULATE_OUTGOING_ARGS
496
#else
497
#define PUSH_ARGS       0
498
#endif
499
#endif
500
 
501
/* Decide whether a function's arguments should be processed
502
   from first to last or from last to first.
503
 
504
   They should if the stack and args grow in opposite directions, but
505
   only if we have push insns.  */
506
 
507
#ifdef PUSH_ROUNDING
508
 
509
#ifndef PUSH_ARGS_REVERSED
510
#if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
511
#define PUSH_ARGS_REVERSED  PUSH_ARGS
512
#endif
513
#endif
514
 
515
#endif
516
 
517
#ifndef PUSH_ARGS_REVERSED
518
#define PUSH_ARGS_REVERSED 0
519
#endif
520
 
521
/* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
522
   STACK_BOUNDARY is required.  */
523
#ifndef PREFERRED_STACK_BOUNDARY
524
#define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
525
#endif
526
 
527
#ifndef TARGET_DEFAULT_PACK_STRUCT
528
#define TARGET_DEFAULT_PACK_STRUCT 0
529
#endif
530
 
531
/* By default, the C++ compiler will use function addresses in the
532
   vtable entries.  Setting this nonzero tells the compiler to use
533
   function descriptors instead.  The value of this macro says how
534
   many words wide the descriptor is (normally 2).  It is assumed
535
   that the address of a function descriptor may be treated as a
536
   pointer to a function.  */
537
#ifndef TARGET_VTABLE_USES_DESCRIPTORS
538
#define TARGET_VTABLE_USES_DESCRIPTORS 0
539
#endif
540
 
541
/* By default, the vtable entries are void pointers, the so the alignment
542
   is the same as pointer alignment.  The value of this macro specifies
543
   the alignment of the vtable entry in bits.  It should be defined only
544
   when special alignment is necessary.  */
545
#ifndef TARGET_VTABLE_ENTRY_ALIGN
546
#define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
547
#endif
548
 
549
/* There are a few non-descriptor entries in the vtable at offsets below
550
   zero.  If these entries must be padded (say, to preserve the alignment
551
   specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
552
   words in each data entry.  */
553
#ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
554
#define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
555
#endif
556
 
557
/* Decide whether it is safe to use a local alias for a virtual function
558
   when constructing thunks.  */
559
#ifndef TARGET_USE_LOCAL_THUNK_ALIAS_P
560
#ifdef ASM_OUTPUT_DEF
561
#define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 1
562
#else
563
#define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) 0
564
#endif
565
#endif
566
 
567
/* Select a format to encode pointers in exception handling data.  We
568
   prefer those that result in fewer dynamic relocations.  Assume no
569
   special support here and encode direct references.  */
570
#ifndef ASM_PREFERRED_EH_DATA_FORMAT
571
#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  DW_EH_PE_absptr
572
#endif
573
 
574
/* By default, the C++ compiler will use the lowest bit of the pointer
575
   to function to indicate a pointer-to-member-function points to a
576
   virtual member function.  However, if FUNCTION_BOUNDARY indicates
577
   function addresses aren't always even, the lowest bit of the delta
578
   field will be used.  */
579
#ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
580
#define TARGET_PTRMEMFUNC_VBIT_LOCATION \
581
  (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
582
   ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
583
#endif
584
 
585
#ifndef DEFAULT_GDB_EXTENSIONS
586
#define DEFAULT_GDB_EXTENSIONS 1
587
#endif
588
 
589
/* If more than one debugging type is supported, you must define
590
   PREFERRED_DEBUGGING_TYPE to choose the default.  */
591
 
592
#if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
593
         + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) \
594
         + defined (VMS_DEBUGGING_INFO))
595
#ifndef PREFERRED_DEBUGGING_TYPE
596
#error You must define PREFERRED_DEBUGGING_TYPE
597
#endif /* no PREFERRED_DEBUGGING_TYPE */
598
 
599
/* If only one debugging format is supported, define PREFERRED_DEBUGGING_TYPE
600
   here so other code needn't care.  */
601
#elif defined DBX_DEBUGGING_INFO
602
#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
603
 
604
#elif defined SDB_DEBUGGING_INFO
605
#define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
606
 
607
#elif defined DWARF2_DEBUGGING_INFO
608
#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
609
 
610
#elif defined VMS_DEBUGGING_INFO
611
#define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
612
 
613
#elif defined XCOFF_DEBUGGING_INFO
614
#define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
615
 
616
#else
617
/* No debugging format is supported by this target.  */
618
#define PREFERRED_DEBUGGING_TYPE NO_DEBUG
619
#endif
620
 
621
/* Define codes for all the float formats that we know of.  */
622
#define UNKNOWN_FLOAT_FORMAT 0
623
#define IEEE_FLOAT_FORMAT 1
624
#define VAX_FLOAT_FORMAT 2
625
#define IBM_FLOAT_FORMAT 3
626
#define C4X_FLOAT_FORMAT 4
627
 
628
/* Default to IEEE float if not specified.  Nearly all machines use it.  */
629
#ifndef TARGET_FLOAT_FORMAT
630
#define TARGET_FLOAT_FORMAT     IEEE_FLOAT_FORMAT
631
#endif
632
 
633
#ifndef LARGEST_EXPONENT_IS_NORMAL
634
#define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
635
#endif
636
 
637
#ifndef ROUND_TOWARDS_ZERO
638
#define ROUND_TOWARDS_ZERO 0
639
#endif
640
 
641
#ifndef MODE_HAS_NANS
642
#define MODE_HAS_NANS(MODE)                                     \
643
  (FLOAT_MODE_P (MODE)                                          \
644
   && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT                  \
645
   && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
646
#endif
647
 
648
#ifndef MODE_HAS_INFINITIES
649
#define MODE_HAS_INFINITIES(MODE)                               \
650
  (FLOAT_MODE_P (MODE)                                          \
651
   && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT                  \
652
   && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
653
#endif
654
 
655
#ifndef MODE_HAS_SIGNED_ZEROS
656
#define MODE_HAS_SIGNED_ZEROS(MODE) \
657
  (FLOAT_MODE_P (MODE) && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT)
658
#endif
659
 
660
#ifndef MODE_HAS_SIGN_DEPENDENT_ROUNDING
661
#define MODE_HAS_SIGN_DEPENDENT_ROUNDING(MODE)                  \
662
  (FLOAT_MODE_P (MODE)                                          \
663
   && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT                  \
664
   && !ROUND_TOWARDS_ZERO)
665
#endif
666
 
667
#ifndef FLOAT_LIB_COMPARE_RETURNS_BOOL
668
#define FLOAT_LIB_COMPARE_RETURNS_BOOL(MODE, COMPARISON) false
669
#endif
670
 
671
/* True if the targets integer-comparison functions return { 0, 1, 2
672
   } to indicate { <, ==, > }.  False if { -1, 0, 1 } is used
673
   instead.  The libgcc routines are biased.  */
674
#ifndef TARGET_LIB_INT_CMP_BIASED
675
#define TARGET_LIB_INT_CMP_BIASED (true)
676
#endif
677
 
678
/* If FLOAT_WORDS_BIG_ENDIAN is not defined in the header files,
679
   then the word-endianness is the same as for integers.  */
680
#ifndef FLOAT_WORDS_BIG_ENDIAN
681
#define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
682
#endif
683
 
684
#ifndef TARGET_FLT_EVAL_METHOD
685
#define TARGET_FLT_EVAL_METHOD 0
686
#endif
687
 
688
#ifndef TARGET_DEC_EVAL_METHOD
689
#define TARGET_DEC_EVAL_METHOD 2
690
#endif
691
 
692
#ifndef HOT_TEXT_SECTION_NAME
693
#define HOT_TEXT_SECTION_NAME ".text.hot"
694
#endif
695
 
696
#ifndef UNLIKELY_EXECUTED_TEXT_SECTION_NAME
697
#define UNLIKELY_EXECUTED_TEXT_SECTION_NAME ".text.unlikely"
698
#endif
699
 
700
#ifndef HAS_LONG_COND_BRANCH
701
#define HAS_LONG_COND_BRANCH 0
702
#endif
703
 
704
#ifndef HAS_LONG_UNCOND_BRANCH
705
#define HAS_LONG_UNCOND_BRANCH 0
706
#endif
707
 
708
/* By default, only attempt to parallelize bitwise operations, and
709
   possibly adds/subtracts using bit-twiddling.  */
710
#ifndef UNITS_PER_SIMD_WORD
711
#define UNITS_PER_SIMD_WORD UNITS_PER_WORD
712
#endif
713
 
714
/* Determine whether __cxa_atexit, rather than atexit, is used to
715
   register C++ destructors for local statics and global objects.  */
716
#ifndef DEFAULT_USE_CXA_ATEXIT
717
#define DEFAULT_USE_CXA_ATEXIT 0
718
#endif
719
 
720
/* If none of these macros are defined, the port must use the new
721
   technique of defining constraints in the machine description.
722
   tm_p.h will define those macros that machine-independent code
723
   still uses.  */
724
#if  !defined CONSTRAINT_LEN                    \
725
  && !defined REG_CLASS_FROM_LETTER             \
726
  && !defined REG_CLASS_FROM_CONSTRAINT         \
727
  && !defined CONST_OK_FOR_LETTER_P             \
728
  && !defined CONST_OK_FOR_CONSTRAINT_P         \
729
  && !defined CONST_DOUBLE_OK_FOR_LETTER_P      \
730
  && !defined CONST_DOUBLE_OK_FOR_CONSTRAINT_P  \
731
  && !defined EXTRA_CONSTRAINT                  \
732
  && !defined EXTRA_CONSTRAINT_STR              \
733
  && !defined EXTRA_MEMORY_CONSTRAINT           \
734
  && !defined EXTRA_ADDRESS_CONSTRAINT
735
 
736
#define USE_MD_CONSTRAINTS
737
 
738
#if GCC_VERSION >= 3000 && defined IN_GCC
739
/* These old constraint macros shouldn't appear anywhere in a
740
   configuration using MD constraint definitions.  */
741
#pragma GCC poison REG_CLASS_FROM_LETTER CONST_OK_FOR_LETTER_P \
742
                   CONST_DOUBLE_OK_FOR_LETTER_P EXTRA_CONSTRAINT
743
#endif
744
 
745
#else /* old constraint mechanism in use */
746
 
747
/* Determine whether extra constraint letter should be handled
748
   via address reload (like 'o').  */
749
#ifndef EXTRA_MEMORY_CONSTRAINT
750
#define EXTRA_MEMORY_CONSTRAINT(C,STR) 0
751
#endif
752
 
753
/* Determine whether extra constraint letter should be handled
754
   as an address (like 'p').  */
755
#ifndef EXTRA_ADDRESS_CONSTRAINT
756
#define EXTRA_ADDRESS_CONSTRAINT(C,STR) 0
757
#endif
758
 
759
/* When a port defines CONSTRAINT_LEN, it should use DEFAULT_CONSTRAINT_LEN
760
   for all the characters that it does not want to change, so things like the
761
  'length' of a digit in a matching constraint is an implementation detail,
762
   and not part of the interface.  */
763
#define DEFAULT_CONSTRAINT_LEN(C,STR) 1
764
 
765
#ifndef CONSTRAINT_LEN
766
#define CONSTRAINT_LEN(C,STR) DEFAULT_CONSTRAINT_LEN (C, STR)
767
#endif
768
 
769
#if defined (CONST_OK_FOR_LETTER_P) && ! defined (CONST_OK_FOR_CONSTRAINT_P)
770
#define CONST_OK_FOR_CONSTRAINT_P(VAL,C,STR) CONST_OK_FOR_LETTER_P (VAL, C)
771
#endif
772
 
773
#if defined (CONST_DOUBLE_OK_FOR_LETTER_P) && ! defined (CONST_DOUBLE_OK_FOR_CONSTRAINT_P)
774
#define CONST_DOUBLE_OK_FOR_CONSTRAINT_P(OP,C,STR) \
775
  CONST_DOUBLE_OK_FOR_LETTER_P (OP, C)
776
#endif
777
 
778
#ifndef REG_CLASS_FROM_CONSTRAINT
779
#define REG_CLASS_FROM_CONSTRAINT(C,STR) REG_CLASS_FROM_LETTER (C)
780
#endif
781
 
782
#if defined (EXTRA_CONSTRAINT) && ! defined (EXTRA_CONSTRAINT_STR)
783
#define EXTRA_CONSTRAINT_STR(OP, C,STR) EXTRA_CONSTRAINT (OP, C)
784
#endif
785
 
786
#endif /* old constraint mechanism in use */
787
 
788
#ifndef REGISTER_MOVE_COST
789
#define REGISTER_MOVE_COST(m, x, y) 2
790
#endif
791
 
792
/* Determine whether the entire c99 runtime
793
   is present in the runtime library.  */
794
#ifndef TARGET_C99_FUNCTIONS
795
#define TARGET_C99_FUNCTIONS 0
796
#endif
797
 
798
/* Indicate that CLZ and CTZ are undefined at zero.  */
799
#ifndef CLZ_DEFINED_VALUE_AT_ZERO
800
#define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
801
#endif
802
#ifndef CTZ_DEFINED_VALUE_AT_ZERO
803
#define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE)  0
804
#endif
805
 
806
/* Provide a default value for STORE_FLAG_VALUE.  */
807
#ifndef STORE_FLAG_VALUE
808
#define STORE_FLAG_VALUE  1
809
#endif
810
 
811
/* This macro is used to determine what the largest unit size that
812
   move_by_pieces can use is.  */
813
 
814
/* MOVE_MAX_PIECES is the number of bytes at a time which we can
815
   move efficiently, as opposed to  MOVE_MAX which is the maximum
816
   number of bytes we can move with a single instruction.  */
817
 
818
#ifndef MOVE_MAX_PIECES
819
#define MOVE_MAX_PIECES   MOVE_MAX
820
#endif
821
 
822
#ifndef STACK_POINTER_OFFSET
823
#define STACK_POINTER_OFFSET    0
824
#endif
825
 
826
#ifndef LOCAL_REGNO
827
#define LOCAL_REGNO(REGNO)  0
828
#endif
829
 
830
/* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
831
   the stack pointer does not matter.  The value is tested only in
832
   functions that have frame pointers.  */
833
#ifndef EXIT_IGNORE_STACK
834
#define EXIT_IGNORE_STACK 0
835
#endif
836
 
837
/* Assume that case vectors are not pc-relative.  */
838
#ifndef CASE_VECTOR_PC_RELATIVE
839
#define CASE_VECTOR_PC_RELATIVE 0
840
#endif
841
 
842
/* Assume that trampolines need function alignment.  */
843
#ifndef TRAMPOLINE_ALIGNMENT
844
#define TRAMPOLINE_ALIGNMENT FUNCTION_BOUNDARY
845
#endif
846
 
847
/* Register mappings for target machines without register windows.  */
848
#ifndef INCOMING_REGNO
849
#define INCOMING_REGNO(N) (N)
850
#endif
851
 
852
#ifndef OUTGOING_REGNO
853
#define OUTGOING_REGNO(N) (N)
854
#endif
855
 
856
#ifndef SHIFT_COUNT_TRUNCATED
857
#define SHIFT_COUNT_TRUNCATED 0
858
#endif
859
 
860
#ifndef LEGITIMIZE_ADDRESS
861
#define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)
862
#endif
863
 
864
#ifndef LEGITIMATE_PIC_OPERAND_P
865
#define LEGITIMATE_PIC_OPERAND_P(X) 1
866
#endif
867
 
868
#ifndef REVERSIBLE_CC_MODE
869
#define REVERSIBLE_CC_MODE(MODE) 0
870
#endif
871
 
872
/* Biggest alignment supported by the object file format of this machine.  */
873
#ifndef MAX_OFILE_ALIGNMENT
874
#define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
875
#endif
876
 
877
#ifndef FRAME_GROWS_DOWNWARD
878
#define FRAME_GROWS_DOWNWARD 0
879
#endif
880
 
881
/* On most machines, the CFA coincides with the first incoming parm.  */
882
#ifndef ARG_POINTER_CFA_OFFSET
883
#define ARG_POINTER_CFA_OFFSET(FNDECL) FIRST_PARM_OFFSET (FNDECL)
884
#endif
885
 
886
/* On most machines, we use the CFA as DW_AT_frame_base.  */
887
#ifndef CFA_FRAME_BASE_OFFSET
888
#define CFA_FRAME_BASE_OFFSET(FNDECL) 0
889
#endif
890
 
891
/* The offset from the incoming value of %sp to the top of the stack frame
892
   for the current function.  */
893
#ifndef INCOMING_FRAME_SP_OFFSET
894
#define INCOMING_FRAME_SP_OFFSET 0
895
#endif
896
 
897
#ifndef HARD_REGNO_NREGS_HAS_PADDING
898
#define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) 0
899
#define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) -1
900
#endif
901
 
902
#endif  /* ! GCC_DEFAULTS_H */

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