gcc/defaults.h

   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)
   5
   6 This file is part of GNU CC.
   7
   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)
  11 any later version.
  12
  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.
  17
  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.  */
  22
  23 #ifndef GCC_DEFAULTS_H
  24 #define GCC_DEFAULTS_H
  25
  26 /* Store in OUTPUT a string (made with alloca) containing
  27    an assembler-name for a local static variable or function named NAME.
  28    LABELNO is an integer which is different for each call.  */
  29
  30 #ifndef ASM_FORMAT_PRIVATE_NAME
  31 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO)                  \
  32   do {                                                                  \
  33     int len = strlen (NAME);                                            \
  34     char *temp = (char *) alloca (len + 3);                             \
  35     temp[0] = 'L';                                                      \
  36     strcpy (&temp[1], (NAME));                                          \
  37     temp[len + 1] = '.';                                                \
  38     temp[len + 2] = 0;                                                  \
  39     (OUTPUT) = (char *) alloca (strlen (NAME) + 11);                    \
  40     ASM_GENERATE_INTERNAL_LABEL (OUTPUT, temp, LABELNO);                \
  41   } while (0)
  42 #endif
  43
  44 #ifndef ASM_STABD_OP
  45 #define ASM_STABD_OP "\t.stabd\t"
  46 #endif
  47
  48 /* This is how to output an element of a case-vector that is absolute.
  49    Some targets don't use this, but we have to define it anyway.  */
  50
  51 #ifndef ASM_OUTPUT_ADDR_VEC_ELT
  52 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
  53 do { fprintf (FILE, "\t%s\t", ASM_LONG);                                \
  54      ASM_OUTPUT_INTERNAL_LABEL (FILE, "L", (VALUE));                    \
  55      fputc ('\n', FILE);                                                \
  56    } while (0)
  57 #endif
  58
  59 /* Provide default for ASM_OUTPUT_ALTERNATE_LABEL_NAME.  */
  60 #ifndef ASM_OUTPUT_ALTERNATE_LABEL_NAME
  61 #define ASM_OUTPUT_ALTERNATE_LABEL_NAME(FILE,INSN) \
  62 do { ASM_OUTPUT_LABEL(FILE,LABEL_ALTERNATE_NAME (INSN)); } while (0)
  63 #endif
  64
  65 /* choose a reasonable default for ASM_OUTPUT_ASCII.  */
  66
  67 #ifndef ASM_OUTPUT_ASCII
  68 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
  69   do {                                                                        \
  70     FILE *_hide_asm_out_file = (MYFILE);                                      \
  71     const unsigned char *_hide_p = (const unsigned char *) (MYSTRING);        \
  72     int _hide_thissize = (MYLENGTH);                                          \
  73     {                                                                         \
  74       FILE *asm_out_file = _hide_asm_out_file;                                \
  75       const unsigned char *p = _hide_p;                                       \
  76       int thissize = _hide_thissize;                                          \
  77       int i;                                                                  \
  78       fprintf (asm_out_file, "\t.ascii \"");                                  \
  79                                                                               \
  80       for (i = 0; i < thissize; i++)                                          \
  81         {                                                                     \
  82           register int c = p[i];                                              \
  83           if (c == '\"' || c == '\\')                                         \
  84             putc ('\\', asm_out_file);                                        \
  85           if (ISPRINT(c))                                                     \
  86             putc (c, asm_out_file);                                           \
  87           else                                                                \
  88             {                                                                 \
  89               fprintf (asm_out_file, "\\%o", c);                              \
  90               /* After an octal-escape, if a digit follows,                   \
  91                  terminate one string constant and start another.             \
  92                  The Vax assembler fails to stop reading the escape           \
  93                  after three digits, so this is the only way we               \
  94                  can get it to parse the data properly.  */                   \
  95               if (i < thissize - 1 && ISDIGIT(p[i + 1]))                      \
  96                 fprintf (asm_out_file, "\"\n\t.ascii \"");                    \
  97           }                                                                   \
  98         }                                                                     \
  99       fprintf (asm_out_file, "\"\n");                                         \
 100     }                                                                         \
 101   }                                                                           \
 102   while (0)
 103 #endif
 104
 105 #ifndef ASM_IDENTIFY_GCC
 106   /* Default the definition, only if ASM_IDENTIFY_GCC is not set,
 107      because if it is set, we might not want ASM_IDENTIFY_LANGUAGE
 108      outputting labels, if we do want it to, then it must be defined
 109      in the tm.h file.  */
 110 #ifndef ASM_IDENTIFY_LANGUAGE
 111 #define ASM_IDENTIFY_LANGUAGE(FILE) output_lang_identify (FILE);
 112 #endif
 113 #endif
 114
 115 /* This is how we tell the assembler to equate two values.  */
 116 #ifdef SET_ASM_OP
 117 #ifndef ASM_OUTPUT_DEF
 118 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
 119  do {   fprintf ((FILE), "%s", SET_ASM_OP);                             \
 120         assemble_name (FILE, LABEL1);                                   \
 121         fprintf (FILE, ",");                                            \
 122         assemble_name (FILE, LABEL2);                                   \
 123         fprintf (FILE, "\n");                                           \
 124   } while (0)
 125 #endif
 126 #endif
 127
 128 /* This is how to output a reference to a user-level label named NAME.  */
 129
 130 #ifndef ASM_OUTPUT_LABELREF
 131 #define ASM_OUTPUT_LABELREF(FILE,NAME)  asm_fprintf ((FILE), "%U%s", (NAME))
 132 #endif
 133
 134 /* Allow target to print debug info labels specially.  This is useful for
 135    VLIW targets, since debug info labels should go into the middle of
 136    instruction bundles instead of breaking them.  */
 137
 138 #ifndef ASM_OUTPUT_DEBUG_LABEL
 139 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
 140   ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM)
 141 #endif
 142
 143 /* This determines whether or not we support weak symbols.  */
 144 #ifndef SUPPORTS_WEAK
 145 #ifdef ASM_WEAKEN_LABEL
 146 #define SUPPORTS_WEAK 1
 147 #else
 148 #define SUPPORTS_WEAK 0
 149 #endif
 150 #endif
 151
 152 /* This determines whether or not we support link-once semantics.  */
 153 #ifndef SUPPORTS_ONE_ONLY
 154 #ifdef MAKE_DECL_ONE_ONLY
 155 #define SUPPORTS_ONE_ONLY 1
 156 #else
 157 #define SUPPORTS_ONE_ONLY 0
 158 #endif
 159 #endif
 160
 161 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
 162    provide a weak attribute.  Else define it to nothing.
 163
 164    This would normally belong in gansidecl.h, but SUPPORTS_WEAK is
 165    not available at that time.
 166
 167    Note, this is only for use by target files which we know are to be
 168    compiled by GCC.  */
 169 #ifndef TARGET_ATTRIBUTE_WEAK
 170 # if SUPPORTS_WEAK
 171 #  define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
 172 # else
 173 #  define TARGET_ATTRIBUTE_WEAK
 174 # endif
 175 #endif
 176
 177 /* If the target supports init_priority C++ attribute, give
 178    SUPPORTS_INIT_PRIORITY a nonzero value.  */
 179 #ifndef SUPPORTS_INIT_PRIORITY
 180 #define SUPPORTS_INIT_PRIORITY 1
 181 #endif /* SUPPORTS_INIT_PRIORITY */
 182
 183 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
 184    the rest of the DWARF 2 frame unwind support is also provided.  */
 185 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
 186 #define DWARF2_UNWIND_INFO 1
 187 #endif
 188
 189 #if defined (DWARF2_UNWIND_INFO) && !defined (EH_FRAME_SECTION)
 190 # if defined (EH_FRAME_SECTION_ASM_OP)
 191 #  define EH_FRAME_SECTION() eh_frame_section ()
 192 # else
 193    /* If we aren't using crtstuff to run ctors, don't use it for EH.  */
 194 #  if defined (ASM_OUTPUT_SECTION_NAME) && defined (ASM_OUTPUT_CONSTRUCTOR)
 195 #   define EH_FRAME_SECTION_ASM_OP      "\t.section\t.eh_frame,\"aw\""
 196 #   define EH_FRAME_SECTION() \
 197      do { named_section (NULL_TREE, ".eh_frame", 0); } while (0)
 198 #  endif
 199 # endif
 200 #endif
 201
 202 /* If we have no definition for UNIQUE_SECTION, but do have the
 203    ability to generate arbitrary sections, construct something
 204    reasonable.  */
 205 #ifdef ASM_OUTPUT_SECTION_NAME
 206 #ifndef UNIQUE_SECTION
 207 #define UNIQUE_SECTION(DECL,RELOC)                              \
 208 do {                                                            \
 209   int len;                                                      \
 210   const char *name;                                             \
 211   char *string;                                                 \
 212                                                                 \
 213   name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL));       \
 214   /* Strip off any encoding in name.  */                        \
 215   STRIP_NAME_ENCODING (name, name);                             \
 216                                                                 \
 217   len = strlen (name) + 1;                                      \
 218   string = alloca (len + 1);                                    \
 219   sprintf (string, ".%s", name);                                \
 220                                                                 \
 221   DECL_SECTION_NAME (DECL) = build_string (len, string);        \
 222 } while (0)
 223 #endif
 224 #ifndef UNIQUE_SECTION_P
 225 #define UNIQUE_SECTION_P(DECL) 0
 226 #endif
 227 #endif
 228
 229 /* By default, we generate a label at the beginning and end of the
 230    text section, and compute the size of the text section by
 231    subtracting the two.  However, on some platforms that doesn't
 232    work, and we use the section itself, rather than a label at the
 233    beginning of it, to indicate the start of the section.  On such
 234    platforms, define this to zero.  */
 235 #ifndef DWARF2_GENERATE_TEXT_SECTION_LABEL
 236 #define DWARF2_GENERATE_TEXT_SECTION_LABEL 1
 237 #endif
 238
 239 /* Supply a default definition for PROMOTE_PROTOTYPES.  */
 240 #ifndef PROMOTE_PROTOTYPES
 241 #define PROMOTE_PROTOTYPES      0
 242 #endif
 243
 244 /* Number of hardware registers that go into the DWARF-2 unwind info.
 245    If not defined, equals FIRST_PSEUDO_REGISTER  */
 246
 247 #ifndef DWARF_FRAME_REGISTERS
 248 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
 249 #endif
 250
 251 /* Default sizes for base C types.  If the sizes are different for
 252    your target, you should override these values by defining the
 253    appropriate symbols in your tm.h file.  */
 254
 255 #ifndef CHAR_TYPE_SIZE
 256 #define CHAR_TYPE_SIZE BITS_PER_UNIT
 257 #endif
 258
 259 #ifndef SHORT_TYPE_SIZE
 260 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
 261 #endif
 262
 263 #ifndef INT_TYPE_SIZE
 264 #define INT_TYPE_SIZE BITS_PER_WORD
 265 #endif
 266
 267 #ifndef LONG_TYPE_SIZE
 268 #define LONG_TYPE_SIZE BITS_PER_WORD
 269 #endif
 270
 271 #ifndef LONG_LONG_TYPE_SIZE
 272 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
 273 #endif
 274
 275 #ifndef WCHAR_TYPE_SIZE
 276 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
 277 #endif
 278
 279 #ifndef WCHAR_UNSIGNED
 280 #define WCHAR_UNSIGNED 0
 281 #endif
 282
 283 #ifndef FLOAT_TYPE_SIZE
 284 #define FLOAT_TYPE_SIZE BITS_PER_WORD
 285 #endif
 286
 287 #ifndef DOUBLE_TYPE_SIZE
 288 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 289 #endif
 290
 291 #ifndef LONG_DOUBLE_TYPE_SIZE
 292 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 293 #endif
 294
 295 #ifndef BUILD_VA_LIST_TYPE
 296 #define BUILD_VA_LIST_TYPE(X) ((X) = ptr_type_node)
 297 #endif
 298
 299 #ifndef PIC_OFFSET_TABLE_REGNUM
 300 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
 301 #endif
 302
 303 /* By default, the preprocessor should be invoked the same way in C++
 304    as in C.  */
 305 #ifndef CPLUSPLUS_CPP_SPEC
 306 #ifdef CPP_SPEC
 307 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
 308 #endif
 309 #endif
 310
 311 #ifndef ACCUMULATE_OUTGOING_ARGS
 312 #define ACCUMULATE_OUTGOING_ARGS 0
 313 #endif
 314
 315 /* Supply a default definition for PUSH_ARGS.  */
 316 #ifndef PUSH_ARGS
 317 #ifdef PUSH_ROUNDING
 318 #define PUSH_ARGS       !ACCUMULATE_OUTGOING_ARGS
 319 #else
 320 #define PUSH_ARGS       0
 321 #endif
 322 #endif
 323
 324 #endif  /* GCC_DEFAULTS_H */
 325