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 /* Define default standard character escape sequences. */
28 # define TARGET_BELL 007
29 # define TARGET_BS 010
30 # define TARGET_TAB 011
31 # define TARGET_NEWLINE 012
32 # define TARGET_VT 013
33 # define TARGET_FF 014
34 # define TARGET_CR 015
35 # define TARGET_ESC 033
38 /* When removal of CPP_PREDEFINES is complete, TARGET_CPU_CPP_BULITINS
39 can also be removed from here. */
40 #ifndef TARGET_OS_CPP_BUILTINS
41 # define TARGET_OS_CPP_BUILTINS()
43 #ifndef TARGET_CPU_CPP_BUILTINS
44 # define TARGET_CPU_CPP_BUILTINS()
46 #ifndef CPP_PREDEFINES
47 # define CPP_PREDEFINES ""
50 /* Store in OUTPUT a string (made with alloca) containing
51 an assembler-name for a local static variable or function named NAME.
52 LABELNO is an integer which is different for each call. */
54 #ifndef ASM_FORMAT_PRIVATE_NAME
55 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
57 int len = strlen (NAME); \
58 char *temp = (char *) alloca (len + 3); \
60 strcpy (&temp[1], (NAME)); \
61 temp[len + 1] = '.'; \
63 (OUTPUT) = (char *) alloca (strlen (NAME) + 11); \
64 ASM_GENERATE_INTERNAL_LABEL (OUTPUT, temp, LABELNO); \
69 #define ASM_STABD_OP "\t.stabd\t"
72 /* This is how to output an element of a case-vector that is absolute.
73 Some targets don't use this, but we have to define it anyway. */
75 #ifndef ASM_OUTPUT_ADDR_VEC_ELT
76 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
77 do { fputs (integer_asm_op (POINTER_SIZE / UNITS_PER_WORD, TRUE), FILE); \
78 ASM_OUTPUT_INTERNAL_LABEL (FILE, "L", (VALUE)); \
83 /* choose a reasonable default for ASM_OUTPUT_ASCII. */
85 #ifndef ASM_OUTPUT_ASCII
86 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
88 FILE *_hide_asm_out_file = (MYFILE); \
89 const unsigned char *_hide_p = (const unsigned char *) (MYSTRING); \
90 int _hide_thissize = (MYLENGTH); \
92 FILE *asm_out_file = _hide_asm_out_file; \
93 const unsigned char *p = _hide_p; \
94 int thissize = _hide_thissize; \
96 fprintf (asm_out_file, "\t.ascii \""); \
98 for (i = 0; i < thissize; i++) \
101 if (c == '\"' || c == '\\') \
102 putc ('\\', asm_out_file); \
104 putc (c, asm_out_file); \
107 fprintf (asm_out_file, "\\%o", c); \
108 /* After an octal-escape, if a digit follows, \
109 terminate one string constant and start another. \
110 The VAX assembler fails to stop reading the escape \
111 after three digits, so this is the only way we \
112 can get it to parse the data properly. */ \
113 if (i < thissize - 1 && ISDIGIT(p[i + 1])) \
114 fprintf (asm_out_file, "\"\n\t.ascii \""); \
117 fprintf (asm_out_file, "\"\n"); \
123 /* This is how we tell the assembler to equate two values. */
125 #ifndef ASM_OUTPUT_DEF
126 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
127 do { fprintf ((FILE), "%s", SET_ASM_OP); \
128 assemble_name (FILE, LABEL1); \
129 fprintf (FILE, ","); \
130 assemble_name (FILE, LABEL2); \
131 fprintf (FILE, "\n"); \
136 /* This is how to output a reference to a user-level label named NAME. */
138 #ifndef ASM_OUTPUT_LABELREF
139 #define ASM_OUTPUT_LABELREF(FILE,NAME) asm_fprintf ((FILE), "%U%s", (NAME))
142 /* Allow target to print debug info labels specially. This is useful for
143 VLIW targets, since debug info labels should go into the middle of
144 instruction bundles instead of breaking them. */
146 #ifndef ASM_OUTPUT_DEBUG_LABEL
147 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
148 ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM)
151 /* This is how we tell the assembler that a symbol is weak. */
152 #ifndef ASM_OUTPUT_WEAK_ALIAS
153 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
154 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE) \
157 ASM_WEAKEN_LABEL (STREAM, NAME); \
159 ASM_OUTPUT_DEF (STREAM, NAME, VALUE); \
165 /* This determines whether or not we support weak symbols. */
166 #ifndef SUPPORTS_WEAK
167 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
168 #define SUPPORTS_WEAK 1
170 #define SUPPORTS_WEAK 0
174 /* This determines whether or not we support link-once semantics. */
175 #ifndef SUPPORTS_ONE_ONLY
176 #ifdef MAKE_DECL_ONE_ONLY
177 #define SUPPORTS_ONE_ONLY 1
179 #define SUPPORTS_ONE_ONLY 0
183 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
184 provide a weak attribute. Else define it to nothing.
186 This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
187 not available at that time.
189 Note, this is only for use by target files which we know are to be
191 #ifndef TARGET_ATTRIBUTE_WEAK
193 # define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
195 # define TARGET_ATTRIBUTE_WEAK
199 /* If the target supports init_priority C++ attribute, give
200 SUPPORTS_INIT_PRIORITY a nonzero value. */
201 #ifndef SUPPORTS_INIT_PRIORITY
202 #define SUPPORTS_INIT_PRIORITY 1
203 #endif /* SUPPORTS_INIT_PRIORITY */
205 /* If duplicate library search directories can be removed from a
206 linker command without changing the linker's semantics, give this
208 #ifndef LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
209 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 0
210 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
212 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
213 the rest of the DWARF 2 frame unwind support is also provided. */
214 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
215 #define DWARF2_UNWIND_INFO 1
218 /* If we have named sections, and we're using crtstuff to run ctors,
219 use them for registering eh frame information. */
220 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
221 && !defined(EH_FRAME_IN_DATA_SECTION)
222 #ifndef EH_FRAME_SECTION_NAME
223 #define EH_FRAME_SECTION_NAME ".eh_frame"
227 /* If we have named section and we support weak symbols, then use the
228 .jcr section for recording java classes which need to be registered
229 at program start-up time. */
230 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
231 #ifndef JCR_SECTION_NAME
232 #define JCR_SECTION_NAME ".jcr"
236 /* By default, we generate a label at the beginning and end of the
237 text section, and compute the size of the text section by
238 subtracting the two. However, on some platforms that doesn't
239 work, and we use the section itself, rather than a label at the
240 beginning of it, to indicate the start of the section. On such
241 platforms, define this to zero. */
242 #ifndef DWARF2_GENERATE_TEXT_SECTION_LABEL
243 #define DWARF2_GENERATE_TEXT_SECTION_LABEL 1
246 /* Supply a default definition for PROMOTE_PROTOTYPES. */
247 #ifndef PROMOTE_PROTOTYPES
248 #define PROMOTE_PROTOTYPES 0
251 /* Number of hardware registers that go into the DWARF-2 unwind info.
252 If not defined, equals FIRST_PSEUDO_REGISTER */
254 #ifndef DWARF_FRAME_REGISTERS
255 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
258 /* How to renumber registers for dbx and gdb. If not defined, assume
259 no renumbering is necessary. */
261 #ifndef DBX_REGISTER_NUMBER
262 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
265 /* Default sizes for base C types. If the sizes are different for
266 your target, you should override these values by defining the
267 appropriate symbols in your tm.h file. */
269 #ifndef BITS_PER_UNIT
270 #define BITS_PER_UNIT 8
273 #ifndef BITS_PER_WORD
274 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
277 #ifndef CHAR_TYPE_SIZE
278 #define CHAR_TYPE_SIZE BITS_PER_UNIT
281 #ifndef BOOL_TYPE_SIZE
282 /* `bool' has size and alignment `1', on almost all platforms. */
283 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
286 #ifndef SHORT_TYPE_SIZE
287 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
290 #ifndef INT_TYPE_SIZE
291 #define INT_TYPE_SIZE BITS_PER_WORD
294 #ifndef LONG_TYPE_SIZE
295 #define LONG_TYPE_SIZE BITS_PER_WORD
298 #ifndef LONG_LONG_TYPE_SIZE
299 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
302 #ifndef WCHAR_TYPE_SIZE
303 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
306 #ifndef FLOAT_TYPE_SIZE
307 #define FLOAT_TYPE_SIZE BITS_PER_WORD
310 #ifndef DOUBLE_TYPE_SIZE
311 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
314 #ifndef LONG_DOUBLE_TYPE_SIZE
315 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
318 /* Width in bits of a pointer. Mind the value of the macro `Pmode'. */
320 #define POINTER_SIZE BITS_PER_WORD
323 #ifndef BUILD_VA_LIST_TYPE
324 #define BUILD_VA_LIST_TYPE(X) ((X) = ptr_type_node)
327 #ifndef PIC_OFFSET_TABLE_REGNUM
328 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
331 /* Type used by GCOV counters. Use 64bit data type if target supports
333 #if LONG_TYPE_SIZE >= 64
334 #define GCOV_TYPE_SIZE LONG_TYPE_SIZE
336 #define GCOV_TYPE_SIZE LONG_LONG_TYPE_SIZE
340 /* By default, the preprocessor should be invoked the same way in C++
342 #ifndef CPLUSPLUS_CPP_SPEC
344 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
348 #ifndef ACCUMULATE_OUTGOING_ARGS
349 #define ACCUMULATE_OUTGOING_ARGS 0
352 /* Supply a default definition for PUSH_ARGS. */
355 #define PUSH_ARGS !ACCUMULATE_OUTGOING_ARGS
361 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
362 STACK_BOUNDARY is required. */
363 #ifndef PREFERRED_STACK_BOUNDARY
364 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
367 /* By default, the C++ compiler will use function addresses in the
368 vtable entries. Setting this non-zero tells the compiler to use
369 function descriptors instead. The value of this macro says how
370 many words wide the descriptor is (normally 2). It is assumed
371 that the address of a function descriptor may be treated as a
372 pointer to a function. */
373 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
374 #define TARGET_VTABLE_USES_DESCRIPTORS 0
377 /* By default, the vtable entries are void pointers, the so the alignment
378 is the same as pointer alignment. The value of this macro specifies
379 the alignment of the vtable entry in bits. It should be defined only
380 when special alignment is necessary. */
381 #ifndef TARGET_VTABLE_ENTRY_ALIGN
382 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
385 /* There are a few non-descriptor entries in the vtable at offsets below
386 zero. If these entries must be padded (say, to preserve the alignment
387 specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
388 words in each data entry. */
389 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
390 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
393 /* Select a format to encode pointers in exception handling data. We
394 prefer those that result in fewer dynamic relocations. Assume no
395 special support here and encode direct references. */
396 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
397 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) DW_EH_PE_absptr
400 /* By default, the C++ compiler will use the lowest bit of the pointer
401 to function to indicate a pointer-to-member-function points to a
402 virtual member function. However, if FUNCTION_BOUNDARY indicates
403 function addresses aren't always even, the lowest bit of the delta
404 field will be used. */
405 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
406 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
407 (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
408 ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
411 #ifndef DEFAULT_GDB_EXTENSIONS
412 #define DEFAULT_GDB_EXTENSIONS 1
415 /* If more than one debugging type is supported, you must define
416 PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
418 This is one long line cause VAXC can't handle a \-newline. */
419 #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))
420 #ifndef PREFERRED_DEBUGGING_TYPE
421 You Lose! You must define PREFERRED_DEBUGGING_TYPE!
422 #endif /* no PREFERRED_DEBUGGING_TYPE */
423 #else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
424 so other code needn't care. */
425 #ifdef DBX_DEBUGGING_INFO
426 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
428 #ifdef SDB_DEBUGGING_INFO
429 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
431 #ifdef DWARF_DEBUGGING_INFO
432 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
434 #ifdef DWARF2_DEBUGGING_INFO
435 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
437 #ifdef VMS_DEBUGGING_INFO
438 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
440 #ifdef XCOFF_DEBUGGING_INFO
441 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
443 #endif /* More than one debugger format enabled. */
445 /* If still not defined, must have been because no debugging formats
447 #ifndef PREFERRED_DEBUGGING_TYPE
448 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
451 /* This is set to 1 if BYTES_BIG_ENDIAN is defined but the target uses a
452 little-endian method of passing and returning structures in registers.
453 On the HP-UX IA64 and PA64 platforms structures are aligned differently
454 then integral values and setting this value to 1 will allow for the
455 special handling of structure arguments and return values in regs. */
457 #ifndef FUNCTION_ARG_REG_LITTLE_ENDIAN
458 #define FUNCTION_ARG_REG_LITTLE_ENDIAN 0
461 /* Determine the register class for registers suitable to be the base
462 address register in a MEM. Allow the choice to be dependent upon
463 the mode of the memory access. */
464 #ifndef MODE_BASE_REG_CLASS
465 #define MODE_BASE_REG_CLASS(MODE) BASE_REG_CLASS
468 #ifndef LARGEST_EXPONENT_IS_NORMAL
469 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
472 #ifndef ROUND_TOWARDS_ZERO
473 #define ROUND_TOWARDS_ZERO 0
476 #ifndef MODE_HAS_NANS
477 #define MODE_HAS_NANS(MODE) \
478 (FLOAT_MODE_P (MODE) \
479 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
480 && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
483 #ifndef MODE_HAS_INFINITIES
484 #define MODE_HAS_INFINITIES(MODE) \
485 (FLOAT_MODE_P (MODE) \
486 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
487 && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
490 #ifndef MODE_HAS_SIGNED_ZEROS
491 #define MODE_HAS_SIGNED_ZEROS(MODE) \
492 (FLOAT_MODE_P (MODE) && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT)
495 #ifndef MODE_HAS_SIGN_DEPENDENT_ROUNDING
496 #define MODE_HAS_SIGN_DEPENDENT_ROUNDING(MODE) \
497 (FLOAT_MODE_P (MODE) \
498 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
499 && !ROUND_TOWARDS_ZERO)
502 #ifndef HOT_TEXT_SECTION_NAME
503 #define HOT_TEXT_SECTION_NAME "text.hot"
506 #ifndef UNLIKELY_EXECUTED_TEXT_SECTION_NAME
507 #define UNLIKELY_EXECUTED_TEXT_SECTION_NAME "text.unlikely"
510 #ifndef VECTOR_MODE_SUPPORTED_P
511 #define VECTOR_MODE_SUPPORTED_P(MODE) 0
514 /* Determine whether __cxa_atexit, rather than atexit, is used to
515 register C++ destructors for local statics and global objects. */
516 #ifndef DEFAULT_USE_CXA_ATEXIT
517 #define DEFAULT_USE_CXA_ATEXIT 0
520 #endif /* ! GCC_DEFAULTS_H */