1 /* Definitions of various defaults for tm.h macros.
2 Copyright (C) 1992, 1996, 1997, 1998, 1999, 2000, 2001, 2002
3 Free Software Foundation, Inc.
4 Contributed by Ron Guilmette (rfg@monkeys.com)
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to the Free
20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
23 #ifndef GCC_DEFAULTS_H
24 #define GCC_DEFAULTS_H
26 #ifndef GET_ENVIRONMENT
27 #define GET_ENVIRONMENT(VALUE, NAME) do { (VALUE) = getenv (NAME); } while (0)
30 #define obstack_chunk_alloc xmalloc
31 #define obstack_chunk_free free
33 /* Define default standard character escape sequences. */
35 # define TARGET_BELL 007
36 # define TARGET_BS 010
37 # define TARGET_TAB 011
38 # define TARGET_NEWLINE 012
39 # define TARGET_VT 013
40 # define TARGET_FF 014
41 # define TARGET_CR 015
42 # define TARGET_ESC 033
45 /* When removal of CPP_PREDEFINES is complete, TARGET_CPU_CPP_BULITINS
46 can also be removed from here. */
47 #ifndef TARGET_OS_CPP_BUILTINS
48 # define TARGET_OS_CPP_BUILTINS()
50 #ifndef TARGET_CPU_CPP_BUILTINS
51 # define TARGET_CPU_CPP_BUILTINS()
53 #ifndef CPP_PREDEFINES
54 # define CPP_PREDEFINES ""
57 /* Store in OUTPUT a string (made with alloca) containing
58 an assembler-name for a local static variable or function named NAME.
59 LABELNO is an integer which is different for each call. */
61 #ifndef ASM_FORMAT_PRIVATE_NAME
62 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
64 int len = strlen (NAME); \
65 char *temp = (char *) alloca (len + 3); \
67 strcpy (&temp[1], (NAME)); \
68 temp[len + 1] = '.'; \
70 (OUTPUT) = (char *) alloca (strlen (NAME) + 11); \
71 ASM_GENERATE_INTERNAL_LABEL (OUTPUT, temp, LABELNO); \
76 #define ASM_STABD_OP "\t.stabd\t"
79 /* This is how to output an element of a case-vector that is absolute.
80 Some targets don't use this, but we have to define it anyway. */
82 #ifndef ASM_OUTPUT_ADDR_VEC_ELT
83 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
84 do { fputs (integer_asm_op (POINTER_SIZE / UNITS_PER_WORD, TRUE), FILE); \
85 ASM_OUTPUT_INTERNAL_LABEL (FILE, "L", (VALUE)); \
90 /* choose a reasonable default for ASM_OUTPUT_ASCII. */
92 #ifndef ASM_OUTPUT_ASCII
93 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
95 FILE *_hide_asm_out_file = (MYFILE); \
96 const unsigned char *_hide_p = (const unsigned char *) (MYSTRING); \
97 int _hide_thissize = (MYLENGTH); \
99 FILE *asm_out_file = _hide_asm_out_file; \
100 const unsigned char *p = _hide_p; \
101 int thissize = _hide_thissize; \
103 fprintf (asm_out_file, "\t.ascii \""); \
105 for (i = 0; i < thissize; i++) \
108 if (c == '\"' || c == '\\') \
109 putc ('\\', asm_out_file); \
111 putc (c, asm_out_file); \
114 fprintf (asm_out_file, "\\%o", c); \
115 /* After an octal-escape, if a digit follows, \
116 terminate one string constant and start another. \
117 The VAX assembler fails to stop reading the escape \
118 after three digits, so this is the only way we \
119 can get it to parse the data properly. */ \
120 if (i < thissize - 1 && ISDIGIT(p[i + 1])) \
121 fprintf (asm_out_file, "\"\n\t.ascii \""); \
124 fprintf (asm_out_file, "\"\n"); \
130 /* This is how we tell the assembler to equate two values. */
132 #ifndef ASM_OUTPUT_DEF
133 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
134 do { fprintf ((FILE), "%s", SET_ASM_OP); \
135 assemble_name (FILE, LABEL1); \
136 fprintf (FILE, ","); \
137 assemble_name (FILE, LABEL2); \
138 fprintf (FILE, "\n"); \
143 /* This is how to output the definition of a user-level label named
144 NAME, such as the label on a static function or variable NAME. */
146 #ifndef ASM_OUTPUT_LABEL
147 #define ASM_OUTPUT_LABEL(FILE,NAME) \
148 do { assemble_name ((FILE), (NAME)); fputs (":\n", (FILE)); } while (0)
151 /* This is how to output a reference to a user-level label named NAME. */
153 #ifndef ASM_OUTPUT_LABELREF
154 #define ASM_OUTPUT_LABELREF(FILE,NAME) asm_fprintf ((FILE), "%U%s", (NAME))
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. */
161 #ifndef ASM_OUTPUT_DEBUG_LABEL
162 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
163 ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM)
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) \
172 ASM_WEAKEN_LABEL (STREAM, NAME); \
174 ASM_OUTPUT_DEF (STREAM, NAME, VALUE); \
180 /* How to emit a .type directive. */
181 #ifndef ASM_OUTPUT_TYPE_DIRECTIVE
182 #if defined TYPE_ASM_OP && defined TYPE_OPERAND_FMT
183 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE) \
186 fputs (TYPE_ASM_OP, STREAM); \
187 assemble_name (STREAM, NAME); \
188 fputs (", ", STREAM); \
189 fprintf (STREAM, TYPE_OPERAND_FMT, TYPE); \
190 putc ('\n', STREAM); \
196 /* How to emit a .size directive. */
197 #ifndef ASM_OUTPUT_SIZE_DIRECTIVE
199 #define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE) \
202 HOST_WIDE_INT size_ = (SIZE); \
203 fputs (SIZE_ASM_OP, STREAM); \
204 assemble_name (STREAM, NAME); \
205 fputs (", ", STREAM); \
206 fprintf (STREAM, HOST_WIDE_INT_PRINT_DEC, size_); \
207 putc ('\n', STREAM); \
211 #define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME) \
214 fputs (SIZE_ASM_OP, STREAM); \
215 assemble_name (STREAM, NAME); \
216 fputs (", .-", STREAM); \
217 assemble_name (STREAM, NAME); \
218 putc ('\n', STREAM); \
225 /* This determines whether or not we support weak symbols. */
226 #ifndef SUPPORTS_WEAK
227 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
228 #define SUPPORTS_WEAK 1
230 #define SUPPORTS_WEAK 0
234 /* This determines whether or not we support link-once semantics. */
235 #ifndef SUPPORTS_ONE_ONLY
236 #ifdef MAKE_DECL_ONE_ONLY
237 #define SUPPORTS_ONE_ONLY 1
239 #define SUPPORTS_ONE_ONLY 0
243 /* By default, there is no prefix on user-defined symbols. */
244 #ifndef USER_LABEL_PREFIX
245 #define USER_LABEL_PREFIX ""
248 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
249 provide a weak attribute. Else define it to nothing.
251 This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
252 not available at that time.
254 Note, this is only for use by target files which we know are to be
256 #ifndef TARGET_ATTRIBUTE_WEAK
258 # define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
260 # define TARGET_ATTRIBUTE_WEAK
264 /* If the target supports init_priority C++ attribute, give
265 SUPPORTS_INIT_PRIORITY a nonzero value. */
266 #ifndef SUPPORTS_INIT_PRIORITY
267 #define SUPPORTS_INIT_PRIORITY 1
268 #endif /* SUPPORTS_INIT_PRIORITY */
270 /* If duplicate library search directories can be removed from a
271 linker command without changing the linker's semantics, give this
273 #ifndef LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
274 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 0
275 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
277 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
278 the rest of the DWARF 2 frame unwind support is also provided. */
279 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
280 #define DWARF2_UNWIND_INFO 1
283 /* If we have named sections, and we're using crtstuff to run ctors,
284 use them for registering eh frame information. */
285 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
286 && !defined(EH_FRAME_IN_DATA_SECTION)
287 #ifndef EH_FRAME_SECTION_NAME
288 #define EH_FRAME_SECTION_NAME ".eh_frame"
292 /* If we have named section and we support weak symbols, then use the
293 .jcr section for recording java classes which need to be registered
294 at program start-up time. */
295 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
296 #ifndef JCR_SECTION_NAME
297 #define JCR_SECTION_NAME ".jcr"
301 /* By default, we generate a label at the beginning and end of the
302 text section, and compute the size of the text section by
303 subtracting the two. However, on some platforms that doesn't
304 work, and we use the section itself, rather than a label at the
305 beginning of it, to indicate the start of the section. On such
306 platforms, define this to zero. */
307 #ifndef DWARF2_GENERATE_TEXT_SECTION_LABEL
308 #define DWARF2_GENERATE_TEXT_SECTION_LABEL 1
311 /* Supply a default definition for PROMOTE_PROTOTYPES. */
312 #ifndef PROMOTE_PROTOTYPES
313 #define PROMOTE_PROTOTYPES 0
316 /* Number of hardware registers that go into the DWARF-2 unwind info.
317 If not defined, equals FIRST_PSEUDO_REGISTER */
319 #ifndef DWARF_FRAME_REGISTERS
320 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
323 /* How to renumber registers for dbx and gdb. If not defined, assume
324 no renumbering is necessary. */
326 #ifndef DBX_REGISTER_NUMBER
327 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
330 /* Default sizes for base C types. If the sizes are different for
331 your target, you should override these values by defining the
332 appropriate symbols in your tm.h file. */
334 #ifndef BITS_PER_UNIT
335 #define BITS_PER_UNIT 8
338 #ifndef BITS_PER_WORD
339 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
342 #ifndef CHAR_TYPE_SIZE
343 #define CHAR_TYPE_SIZE BITS_PER_UNIT
346 #ifndef BOOL_TYPE_SIZE
347 /* `bool' has size and alignment `1', on almost all platforms. */
348 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
351 #ifndef SHORT_TYPE_SIZE
352 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
355 #ifndef INT_TYPE_SIZE
356 #define INT_TYPE_SIZE BITS_PER_WORD
359 #ifndef LONG_TYPE_SIZE
360 #define LONG_TYPE_SIZE BITS_PER_WORD
363 #ifndef LONG_LONG_TYPE_SIZE
364 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
367 #ifndef WCHAR_TYPE_SIZE
368 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
371 #ifndef FLOAT_TYPE_SIZE
372 #define FLOAT_TYPE_SIZE BITS_PER_WORD
375 #ifndef DOUBLE_TYPE_SIZE
376 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
379 #ifndef LONG_DOUBLE_TYPE_SIZE
380 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
383 /* Width in bits of a pointer. Mind the value of the macro `Pmode'. */
385 #define POINTER_SIZE BITS_PER_WORD
388 #ifndef BUILD_VA_LIST_TYPE
389 #define BUILD_VA_LIST_TYPE(X) ((X) = ptr_type_node)
392 #ifndef PIC_OFFSET_TABLE_REGNUM
393 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
396 /* Type used by GCOV counters. Use 64bit data type if target supports
398 #if LONG_TYPE_SIZE >= 64
399 #define GCOV_TYPE_SIZE LONG_TYPE_SIZE
401 #define GCOV_TYPE_SIZE LONG_LONG_TYPE_SIZE
405 /* By default, the preprocessor should be invoked the same way in C++
407 #ifndef CPLUSPLUS_CPP_SPEC
409 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
413 #ifndef ACCUMULATE_OUTGOING_ARGS
414 #define ACCUMULATE_OUTGOING_ARGS 0
417 /* Supply a default definition for PUSH_ARGS. */
420 #define PUSH_ARGS !ACCUMULATE_OUTGOING_ARGS
426 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
427 STACK_BOUNDARY is required. */
428 #ifndef PREFERRED_STACK_BOUNDARY
429 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
432 /* By default, the C++ compiler will use function addresses in the
433 vtable entries. Setting this nonzero tells the compiler to use
434 function descriptors instead. The value of this macro says how
435 many words wide the descriptor is (normally 2). It is assumed
436 that the address of a function descriptor may be treated as a
437 pointer to a function. */
438 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
439 #define TARGET_VTABLE_USES_DESCRIPTORS 0
442 /* By default, the vtable entries are void pointers, the so the alignment
443 is the same as pointer alignment. The value of this macro specifies
444 the alignment of the vtable entry in bits. It should be defined only
445 when special alignment is necessary. */
446 #ifndef TARGET_VTABLE_ENTRY_ALIGN
447 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
450 /* There are a few non-descriptor entries in the vtable at offsets below
451 zero. If these entries must be padded (say, to preserve the alignment
452 specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
453 words in each data entry. */
454 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
455 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
458 /* Select a format to encode pointers in exception handling data. We
459 prefer those that result in fewer dynamic relocations. Assume no
460 special support here and encode direct references. */
461 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
462 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) DW_EH_PE_absptr
465 /* By default, the C++ compiler will use the lowest bit of the pointer
466 to function to indicate a pointer-to-member-function points to a
467 virtual member function. However, if FUNCTION_BOUNDARY indicates
468 function addresses aren't always even, the lowest bit of the delta
469 field will be used. */
470 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
471 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
472 (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
473 ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
476 #ifndef DEFAULT_GDB_EXTENSIONS
477 #define DEFAULT_GDB_EXTENSIONS 1
480 /* If more than one debugging type is supported, you must define
481 PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
483 This is one long line cause VAXC can't handle a \-newline. */
484 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) + defined (VMS_DEBUGGING_INFO))
485 #ifndef PREFERRED_DEBUGGING_TYPE
486 You Lose
! You must define PREFERRED_DEBUGGING_TYPE
!
487 #endif /* no PREFERRED_DEBUGGING_TYPE */
488 #else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
489 so other code needn't care. */
490 #ifdef DBX_DEBUGGING_INFO
491 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
493 #ifdef SDB_DEBUGGING_INFO
494 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
496 #ifdef DWARF_DEBUGGING_INFO
497 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
499 #ifdef DWARF2_DEBUGGING_INFO
500 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
502 #ifdef VMS_DEBUGGING_INFO
503 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
505 #ifdef XCOFF_DEBUGGING_INFO
506 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
508 #endif /* More than one debugger format enabled. */
510 /* If still not defined, must have been because no debugging formats
512 #ifndef PREFERRED_DEBUGGING_TYPE
513 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
516 /* Define codes for all the float formats that we know of. */
517 #define UNKNOWN_FLOAT_FORMAT 0
518 #define IEEE_FLOAT_FORMAT 1
519 #define VAX_FLOAT_FORMAT 2
520 #define IBM_FLOAT_FORMAT 3
521 #define C4X_FLOAT_FORMAT 4
523 /* Default to IEEE float if not specified. Nearly all machines use it. */
524 #ifndef TARGET_FLOAT_FORMAT
525 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
528 /* Determine the register class for registers suitable to be the base
529 address register in a MEM. Allow the choice to be dependent upon
530 the mode of the memory access. */
531 #ifndef MODE_BASE_REG_CLASS
532 #define MODE_BASE_REG_CLASS(MODE) BASE_REG_CLASS
535 #ifndef LARGEST_EXPONENT_IS_NORMAL
536 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
539 #ifndef ROUND_TOWARDS_ZERO
540 #define ROUND_TOWARDS_ZERO 0
543 #ifndef MODE_HAS_NANS
544 #define MODE_HAS_NANS(MODE) \
545 (FLOAT_MODE_P (MODE) \
546 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
547 && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
550 #ifndef MODE_HAS_INFINITIES
551 #define MODE_HAS_INFINITIES(MODE) \
552 (FLOAT_MODE_P (MODE) \
553 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
554 && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
557 #ifndef MODE_HAS_SIGNED_ZEROS
558 #define MODE_HAS_SIGNED_ZEROS(MODE) \
559 (FLOAT_MODE_P (MODE) && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT)
562 #ifndef MODE_HAS_SIGN_DEPENDENT_ROUNDING
563 #define MODE_HAS_SIGN_DEPENDENT_ROUNDING(MODE) \
564 (FLOAT_MODE_P (MODE) \
565 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
566 && !ROUND_TOWARDS_ZERO)
569 /* If FLOAT_WORDS_BIG_ENDIAN and HOST_FLOAT_WORDS_BIG_ENDIAN are not defined
570 in the header files, then this implies the word-endianness is the same as
572 #ifndef FLOAT_WORDS_BIG_ENDIAN
573 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
576 #ifndef TARGET_FLT_EVAL_METHOD
577 #define TARGET_FLT_EVAL_METHOD 0
580 #ifndef HOT_TEXT_SECTION_NAME
581 #define HOT_TEXT_SECTION_NAME "text.hot"
584 #ifndef UNLIKELY_EXECUTED_TEXT_SECTION_NAME
585 #define UNLIKELY_EXECUTED_TEXT_SECTION_NAME "text.unlikely"
588 #ifndef VECTOR_MODE_SUPPORTED_P
589 #define VECTOR_MODE_SUPPORTED_P(MODE) 0
592 /* Determine whether __cxa_atexit, rather than atexit, is used to
593 register C++ destructors for local statics and global objects. */
594 #ifndef DEFAULT_USE_CXA_ATEXIT
595 #define DEFAULT_USE_CXA_ATEXIT 0
598 /* Determine whether extra constraint letter should be handled
599 via address reload (like 'o'). */
600 #ifndef EXTRA_MEMORY_CONSTRAINT
601 #define EXTRA_MEMORY_CONSTRAINT(C) 0
604 /* Determine whether extra constraint letter should be handled
605 as an address (like 'p'). */
606 #ifndef EXTRA_ADDRESS_CONSTRAINT
607 #define EXTRA_ADDRESS_CONSTRAINT(C) 0
610 #endif /* ! GCC_DEFAULTS_H */