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 /* Store in OUTPUT a string (made with alloca) containing
39 an assembler-name for a local static variable or function named NAME.
40 LABELNO is an integer which is different for each call. */
42 #ifndef ASM_FORMAT_PRIVATE_NAME
43 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
45 int len = strlen (NAME); \
46 char *temp = (char *) alloca (len + 3); \
48 strcpy (&temp[1], (NAME)); \
49 temp[len + 1] = '.'; \
51 (OUTPUT) = (char *) alloca (strlen (NAME) + 11); \
52 ASM_GENERATE_INTERNAL_LABEL (OUTPUT, temp, LABELNO); \
57 #define ASM_STABD_OP "\t.stabd\t"
60 /* This is how to output an element of a case-vector that is absolute.
61 Some targets don't use this, but we have to define it anyway. */
63 #ifndef ASM_OUTPUT_ADDR_VEC_ELT
64 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
65 do { fputs (integer_asm_op (POINTER_SIZE / UNITS_PER_WORD, TRUE), FILE); \
66 ASM_OUTPUT_INTERNAL_LABEL (FILE, "L", (VALUE)); \
71 /* Provide default for ASM_OUTPUT_ALTERNATE_LABEL_NAME. */
72 #ifndef ASM_OUTPUT_ALTERNATE_LABEL_NAME
73 #define ASM_OUTPUT_ALTERNATE_LABEL_NAME(FILE,INSN) \
74 do { ASM_OUTPUT_LABEL(FILE,LABEL_ALTERNATE_NAME (INSN)); } while (0)
77 /* choose a reasonable default for ASM_OUTPUT_ASCII. */
79 #ifndef ASM_OUTPUT_ASCII
80 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
82 FILE *_hide_asm_out_file = (MYFILE); \
83 const unsigned char *_hide_p = (const unsigned char *) (MYSTRING); \
84 int _hide_thissize = (MYLENGTH); \
86 FILE *asm_out_file = _hide_asm_out_file; \
87 const unsigned char *p = _hide_p; \
88 int thissize = _hide_thissize; \
90 fprintf (asm_out_file, "\t.ascii \""); \
92 for (i = 0; i < thissize; i++) \
95 if (c == '\"' || c == '\\') \
96 putc ('\\', asm_out_file); \
98 putc (c, asm_out_file); \
101 fprintf (asm_out_file, "\\%o", c); \
102 /* After an octal-escape, if a digit follows, \
103 terminate one string constant and start another. \
104 The VAX assembler fails to stop reading the escape \
105 after three digits, so this is the only way we \
106 can get it to parse the data properly. */ \
107 if (i < thissize - 1 && ISDIGIT(p[i + 1])) \
108 fprintf (asm_out_file, "\"\n\t.ascii \""); \
111 fprintf (asm_out_file, "\"\n"); \
117 /* This is how we tell the assembler to equate two values. */
119 #ifndef ASM_OUTPUT_DEF
120 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
121 do { fprintf ((FILE), "%s", SET_ASM_OP); \
122 assemble_name (FILE, LABEL1); \
123 fprintf (FILE, ","); \
124 assemble_name (FILE, LABEL2); \
125 fprintf (FILE, "\n"); \
130 /* This is how to output a reference to a user-level label named NAME. */
132 #ifndef ASM_OUTPUT_LABELREF
133 #define ASM_OUTPUT_LABELREF(FILE,NAME) asm_fprintf ((FILE), "%U%s", (NAME))
136 /* Allow target to print debug info labels specially. This is useful for
137 VLIW targets, since debug info labels should go into the middle of
138 instruction bundles instead of breaking them. */
140 #ifndef ASM_OUTPUT_DEBUG_LABEL
141 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
142 ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM)
145 /* This is how we tell the assembler that a symbol is weak. */
146 #ifndef ASM_OUTPUT_WEAK_ALIAS
147 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
148 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE) \
151 ASM_WEAKEN_LABEL (STREAM, NAME); \
153 ASM_OUTPUT_DEF (STREAM, NAME, VALUE); \
159 /* This determines whether or not we support weak symbols. */
160 #ifndef SUPPORTS_WEAK
161 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
162 #define SUPPORTS_WEAK 1
164 #define SUPPORTS_WEAK 0
168 /* This determines whether or not we support link-once semantics. */
169 #ifndef SUPPORTS_ONE_ONLY
170 #ifdef MAKE_DECL_ONE_ONLY
171 #define SUPPORTS_ONE_ONLY 1
173 #define SUPPORTS_ONE_ONLY 0
177 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
178 provide a weak attribute. Else define it to nothing.
180 This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
181 not available at that time.
183 Note, this is only for use by target files which we know are to be
185 #ifndef TARGET_ATTRIBUTE_WEAK
187 # define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
189 # define TARGET_ATTRIBUTE_WEAK
193 /* If the target supports init_priority C++ attribute, give
194 SUPPORTS_INIT_PRIORITY a nonzero value. */
195 #ifndef SUPPORTS_INIT_PRIORITY
196 #define SUPPORTS_INIT_PRIORITY 1
197 #endif /* SUPPORTS_INIT_PRIORITY */
199 /* If duplicate library search directories can be removed from a
200 linker command without changing the linker's semantics, give this
202 #ifndef LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
203 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 0
204 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
206 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
207 the rest of the DWARF 2 frame unwind support is also provided. */
208 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
209 #define DWARF2_UNWIND_INFO 1
212 /* If we have named sections, and we're using crtstuff to run ctors,
213 use them for registering eh frame information. */
214 #if defined (TARGET_ASM_NAMED_SECTION) && !defined(EH_FRAME_IN_DATA_SECTION)
215 #ifndef EH_FRAME_SECTION_NAME
216 #define EH_FRAME_SECTION_NAME ".eh_frame"
220 /* If we have named section and we support weak symbols, then use the
221 .jcr section for recording java classes which need to be registered
222 at program start-up time. */
223 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
224 #ifndef JCR_SECTION_NAME
225 #define JCR_SECTION_NAME ".jcr"
229 /* If we have no definition for UNIQUE_SECTION, but do have the
230 ability to generate arbitrary sections, construct something
232 #ifndef UNIQUE_SECTION
233 #define UNIQUE_SECTION(DECL,RELOC) \
239 name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL)); \
240 /* Strip off any encoding in name. */ \
241 STRIP_NAME_ENCODING (name, name); \
243 len = strlen (name) + 1; \
244 string = alloca (len + 1); \
245 sprintf (string, ".%s", name); \
247 DECL_SECTION_NAME (DECL) = build_string (len, string); \
251 /* By default, we generate a label at the beginning and end of the
252 text section, and compute the size of the text section by
253 subtracting the two. However, on some platforms that doesn't
254 work, and we use the section itself, rather than a label at the
255 beginning of it, to indicate the start of the section. On such
256 platforms, define this to zero. */
257 #ifndef DWARF2_GENERATE_TEXT_SECTION_LABEL
258 #define DWARF2_GENERATE_TEXT_SECTION_LABEL 1
261 /* Supply a default definition for PROMOTE_PROTOTYPES. */
262 #ifndef PROMOTE_PROTOTYPES
263 #define PROMOTE_PROTOTYPES 0
266 /* Number of hardware registers that go into the DWARF-2 unwind info.
267 If not defined, equals FIRST_PSEUDO_REGISTER */
269 #ifndef DWARF_FRAME_REGISTERS
270 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
273 /* How to renumber registers for dbx and gdb. If not defined, assume
274 no renumbering is necessary. */
276 #ifndef DBX_REGISTER_NUMBER
277 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
280 /* Default sizes for base C types. If the sizes are different for
281 your target, you should override these values by defining the
282 appropriate symbols in your tm.h file. */
284 #ifndef BITS_PER_UNIT
285 #define BITS_PER_UNIT 8
288 #ifndef BITS_PER_WORD
289 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
292 #ifndef CHAR_TYPE_SIZE
293 #define CHAR_TYPE_SIZE BITS_PER_UNIT
296 #ifndef SHORT_TYPE_SIZE
297 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
300 #ifndef INT_TYPE_SIZE
301 #define INT_TYPE_SIZE BITS_PER_WORD
304 #ifndef LONG_TYPE_SIZE
305 #define LONG_TYPE_SIZE BITS_PER_WORD
308 #ifndef LONG_LONG_TYPE_SIZE
309 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
312 #ifndef WCHAR_TYPE_SIZE
313 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
316 #ifndef WCHAR_UNSIGNED
317 #define WCHAR_UNSIGNED 0
320 #ifndef FLOAT_TYPE_SIZE
321 #define FLOAT_TYPE_SIZE BITS_PER_WORD
324 #ifndef DOUBLE_TYPE_SIZE
325 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
328 #ifndef LONG_DOUBLE_TYPE_SIZE
329 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
332 /* Width in bits of a pointer. Mind the value of the macro `Pmode'. */
334 #define POINTER_SIZE BITS_PER_WORD
337 #ifndef BUILD_VA_LIST_TYPE
338 #define BUILD_VA_LIST_TYPE(X) ((X) = ptr_type_node)
341 #ifndef PIC_OFFSET_TABLE_REGNUM
342 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
345 /* Type used by GCOV counters. Use 64bit data type if target supports
347 #if LONG_TYPE_SIZE >= 64
348 #define GCOV_TYPE_SIZE LONG_TYPE_SIZE
350 #define GCOV_TYPE_SIZE LONG_LONG_TYPE_SIZE
354 /* By default, the preprocessor should be invoked the same way in C++
356 #ifndef CPLUSPLUS_CPP_SPEC
358 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
362 #ifndef ACCUMULATE_OUTGOING_ARGS
363 #define ACCUMULATE_OUTGOING_ARGS 0
366 /* Supply a default definition for PUSH_ARGS. */
369 #define PUSH_ARGS !ACCUMULATE_OUTGOING_ARGS
375 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
376 STACK_BOUNDARY is required. */
377 #ifndef PREFERRED_STACK_BOUNDARY
378 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
381 /* By default, the C++ compiler will use function addresses in the
382 vtable entries. Setting this non-zero tells the compiler to use
383 function descriptors instead. The value of this macro says how
384 many words wide the descriptor is (normally 2). It is assumed
385 that the address of a function descriptor may be treated as a
386 pointer to a function. */
387 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
388 #define TARGET_VTABLE_USES_DESCRIPTORS 0
391 /* Select a format to encode pointers in exception handling data. We
392 prefer those that result in fewer dynamic relocations. Assume no
393 special support here and encode direct references. */
394 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
395 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) DW_EH_PE_absptr
398 /* By default, the C++ compiler will use the lowest bit of the pointer
399 to function to indicate a pointer-to-member-function points to a
400 virtual member function. However, if FUNCTION_BOUNDARY indicates
401 function addresses aren't always even, the lowest bit of the delta
402 field will be used. */
403 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
404 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
405 (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
406 ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
409 /* True if it is possible to profile code that does not have a frame
412 #ifndef TARGET_ALLOWS_PROFILING_WITHOUT_FRAME_POINTER
413 #define TARGET_ALLOWS_PROFILING_WITHOUT_FRAME_POINTER true
416 #ifndef DEFAULT_GDB_EXTENSIONS
417 #define DEFAULT_GDB_EXTENSIONS 1
420 /* If more than one debugging type is supported, you must define
421 PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
423 This is one long line cause VAXC can't handle a \-newline. */
424 #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))
425 #ifndef PREFERRED_DEBUGGING_TYPE
426 You Lose
! You must define PREFERRED_DEBUGGING_TYPE
!
427 #endif /* no PREFERRED_DEBUGGING_TYPE */
428 #else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
429 so other code needn't care. */
430 #ifdef DBX_DEBUGGING_INFO
431 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
433 #ifdef SDB_DEBUGGING_INFO
434 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
436 #ifdef DWARF_DEBUGGING_INFO
437 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
439 #ifdef DWARF2_DEBUGGING_INFO
440 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
442 #ifdef VMS_DEBUGGING_INFO
443 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
445 #ifdef XCOFF_DEBUGGING_INFO
446 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
448 #endif /* More than one debugger format enabled. */
450 /* If still not defined, must have been because no debugging formats
452 #ifndef PREFERRED_DEBUGGING_TYPE
453 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
456 /* This is set to 1 if BYTES_BIG_ENDIAN is defined but the target uses a
457 little-endian method of passing and returning structures in registers.
458 On the HP-UX IA64 and PA64 platforms structures are aligned differently
459 then integral values and setting this value to 1 will allow for the
460 special handling of structure arguments and return values in regs. */
462 #ifndef FUNCTION_ARG_REG_LITTLE_ENDIAN
463 #define FUNCTION_ARG_REG_LITTLE_ENDIAN 0
466 /* Determine the register class for registers suitable to be the base
467 address register in a MEM. Allow the choice to be dependent upon
468 the mode of the memory access. */
469 #ifndef MODE_BASE_REG_CLASS
470 #define MODE_BASE_REG_CLASS(MODE) BASE_REG_CLASS
473 #ifndef LARGEST_EXPONENT_IS_NORMAL
474 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
477 #ifndef ROUND_TOWARDS_ZERO
478 #define ROUND_TOWARDS_ZERO 0
481 #ifndef MODE_HAS_NANS
482 #define MODE_HAS_NANS(MODE) \
483 (FLOAT_MODE_P (MODE) \
484 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
485 && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
488 #ifndef MODE_HAS_INFINITIES
489 #define MODE_HAS_INFINITIES(MODE) \
490 (FLOAT_MODE_P (MODE) \
491 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
492 && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
495 #ifndef MODE_HAS_SIGNED_ZEROS
496 #define MODE_HAS_SIGNED_ZEROS(MODE) \
497 (FLOAT_MODE_P (MODE) && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT)
500 #ifndef MODE_HAS_SIGN_DEPENDENT_ROUNDING
501 #define MODE_HAS_SIGN_DEPENDENT_ROUNDING(MODE) \
502 (FLOAT_MODE_P (MODE) \
503 && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT \
504 && !ROUND_TOWARDS_ZERO)
507 #endif /* ! GCC_DEFAULTS_H */