1 /* Definitions of various defaults for tm.h macros.
2 Copyright (C) 1992, 1996, 1997, 1998, 1999, 2000, 2001
3 Free Software Foundation, Inc.
4 Contributed by Ron Guilmette (rfg@monkeys.com)
6 This file is part of GNU CC.
8 GNU CC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU CC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU CC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
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 { fprintf (FILE, "\t%s\t", ASM_LONG); \
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++) \
94 register int c = p[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 #if !defined (ASM_OUTPUT_WEAK_ALIAS) && defined (ASM_OUTPUT_DEF)
147 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE) \
150 ASM_WEAKEN_LABEL (STREAM, NAME); \
152 ASM_OUTPUT_DEF (STREAM, NAME, VALUE); \
157 /* This determines whether or not we support weak symbols. */
158 #ifndef SUPPORTS_WEAK
159 #ifdef ASM_WEAKEN_LABEL
160 #define SUPPORTS_WEAK 1
162 #define SUPPORTS_WEAK 0
166 /* This determines whether or not we support link-once semantics. */
167 #ifndef SUPPORTS_ONE_ONLY
168 #ifdef MAKE_DECL_ONE_ONLY
169 #define SUPPORTS_ONE_ONLY 1
171 #define SUPPORTS_ONE_ONLY 0
175 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
176 provide a weak attribute. Else define it to nothing.
178 This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
179 not available at that time.
181 Note, this is only for use by target files which we know are to be
183 #ifndef TARGET_ATTRIBUTE_WEAK
185 # define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
187 # define TARGET_ATTRIBUTE_WEAK
191 /* If the target supports init_priority C++ attribute, give
192 SUPPORTS_INIT_PRIORITY a nonzero value. */
193 #ifndef SUPPORTS_INIT_PRIORITY
194 #define SUPPORTS_INIT_PRIORITY 1
195 #endif /* SUPPORTS_INIT_PRIORITY */
197 /* If duplicate library search directories can be removed from a
198 linker command without changing the linker's semantics, give this
200 #ifndef LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
201 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 0
202 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
204 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
205 the rest of the DWARF 2 frame unwind support is also provided. */
206 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
207 #define DWARF2_UNWIND_INFO 1
210 #if defined (DWARF2_UNWIND_INFO) && !defined (EH_FRAME_SECTION)
211 # if defined (EH_FRAME_SECTION_ASM_OP)
212 # define EH_FRAME_SECTION() eh_frame_section ()
214 /* If we aren't using crtstuff to run ctors, don't use it for EH. */
215 # if defined (ASM_OUTPUT_SECTION_NAME) && defined (ASM_OUTPUT_CONSTRUCTOR)
216 # define EH_FRAME_SECTION_ASM_OP "\t.section\t.eh_frame,\"aw\""
217 # define EH_FRAME_SECTION() \
218 do { named_section (NULL_TREE, ".eh_frame", 0); } while (0)
223 /* If we have no definition for UNIQUE_SECTION, but do have the
224 ability to generate arbitrary sections, construct something
226 #ifdef ASM_OUTPUT_SECTION_NAME
227 #ifndef UNIQUE_SECTION
228 #define UNIQUE_SECTION(DECL,RELOC) \
234 name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL)); \
235 /* Strip off any encoding in name. */ \
236 STRIP_NAME_ENCODING (name, name); \
238 len = strlen (name) + 1; \
239 string = alloca (len + 1); \
240 sprintf (string, ".%s", name); \
242 DECL_SECTION_NAME (DECL) = build_string (len, string); \
245 #ifndef UNIQUE_SECTION_P
246 #define UNIQUE_SECTION_P(DECL) 0
250 /* By default, we generate a label at the beginning and end of the
251 text section, and compute the size of the text section by
252 subtracting the two. However, on some platforms that doesn't
253 work, and we use the section itself, rather than a label at the
254 beginning of it, to indicate the start of the section. On such
255 platforms, define this to zero. */
256 #ifndef DWARF2_GENERATE_TEXT_SECTION_LABEL
257 #define DWARF2_GENERATE_TEXT_SECTION_LABEL 1
260 /* Supply a default definition for PROMOTE_PROTOTYPES. */
261 #ifndef PROMOTE_PROTOTYPES
262 #define PROMOTE_PROTOTYPES 0
265 /* Number of hardware registers that go into the DWARF-2 unwind info.
266 If not defined, equals FIRST_PSEUDO_REGISTER */
268 #ifndef DWARF_FRAME_REGISTERS
269 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
272 /* Default sizes for base C types. If the sizes are different for
273 your target, you should override these values by defining the
274 appropriate symbols in your tm.h file. */
276 #ifndef CHAR_TYPE_SIZE
277 #define CHAR_TYPE_SIZE BITS_PER_UNIT
280 #ifndef SHORT_TYPE_SIZE
281 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
284 #ifndef INT_TYPE_SIZE
285 #define INT_TYPE_SIZE BITS_PER_WORD
288 #ifndef LONG_TYPE_SIZE
289 #define LONG_TYPE_SIZE BITS_PER_WORD
292 #ifndef LONG_LONG_TYPE_SIZE
293 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
296 #ifndef WCHAR_TYPE_SIZE
297 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
300 #ifndef WCHAR_UNSIGNED
301 #define WCHAR_UNSIGNED 0
304 #ifndef FLOAT_TYPE_SIZE
305 #define FLOAT_TYPE_SIZE BITS_PER_WORD
308 #ifndef DOUBLE_TYPE_SIZE
309 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
312 #ifndef LONG_DOUBLE_TYPE_SIZE
313 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
316 #ifndef BUILD_VA_LIST_TYPE
317 #define BUILD_VA_LIST_TYPE(X) ((X) = ptr_type_node)
320 #ifndef PIC_OFFSET_TABLE_REGNUM
321 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
324 /* Type used by GCOV counters. Use 64bit data type if target supports
326 #if LONG_TYPE_SIZE >= 64
327 #define GCOV_TYPE_SIZE LONG_TYPE_SIZE
329 #define GCOV_TYPE_SIZE LONG_LONG_TYPE_SIZE
333 /* By default, the preprocessor should be invoked the same way in C++
335 #ifndef CPLUSPLUS_CPP_SPEC
337 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
341 #ifndef ACCUMULATE_OUTGOING_ARGS
342 #define ACCUMULATE_OUTGOING_ARGS 0
345 /* Supply a default definition for PUSH_ARGS. */
348 #define PUSH_ARGS !ACCUMULATE_OUTGOING_ARGS
354 /* Select a format to encode pointers in exception handling data. We
355 prefer those that result in fewer dynamic relocations. Assume no
356 special support here and encode direct references. */
357 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
358 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) DW_EH_PE_absptr
361 /* By default, the C++ compiler will use the lowest bit of the pointer
362 to function to indicate a pointer-to-member-function points to a
363 virtual member function. However, if FUNCTION_BOUNDARY indicates
364 function addresses aren't always even, the lowest bit of the delta
365 field will be used. */
366 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
367 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
368 (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
369 ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
372 /* True if it is possible to profile code that does not have a frame
375 #ifndef TARGET_ALLOWS_PROFILING_WITHOUT_FRAME_POINTER
376 #define TARGET_ALLOWS_PROFILING_WITHOUT_FRAME_POINTER true
379 #endif /* ! GCC_DEFAULTS_H */