gcc/defaults.h

   1 /* Definitions of various defaults for how to do assembler output
   2    (most of which are designed to be appropriate for GAS or for
   3    some BSD assembler).
   4    Copyright (C) 1992, 1996, 1997, 1998, 1999, 2000
   5    Free Software Foundation, Inc.
   6    Contributed by Ron Guilmette (rfg@monkeys.com)
   7
   8 This file is part of GNU CC.
   9
  10 GNU CC is free software; you can redistribute it and/or modify
  11 it under the terms of the GNU General Public License as published by
  12 the Free Software Foundation; either version 2, or (at your option)
  13 any later version.
  14
  15 GNU CC is distributed in the hope that it will be useful,
  16 but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 GNU General Public License for more details.
  19
  20 You should have received a copy of the GNU General Public License
  21 along with GNU CC; see the file COPYING.  If not, write to
  22 the Free Software Foundation, 59 Temple Place - Suite 330,
  23 Boston, MA 02111-1307, USA.  */
  24
  25 #ifndef GCC_DEFAULTS_H
  26 #define GCC_DEFAULTS_H
  27
  28 /* Store in OUTPUT a string (made with alloca) containing
  29    an assembler-name for a local static variable or function named NAME.
  30    LABELNO is an integer which is different for each call.  */
  31
  32 #ifndef ASM_FORMAT_PRIVATE_NAME
  33 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO)                  \
  34   do {                                                                  \
  35     int len = strlen (NAME);                                            \
  36     char *temp = (char *) alloca (len + 3);                             \
  37     temp[0] = 'L';                                                      \
  38     strcpy (&temp[1], (NAME));                                          \
  39     temp[len + 1] = '.';                                                \
  40     temp[len + 2] = 0;                                                  \
  41     (OUTPUT) = (char *) alloca (strlen (NAME) + 11);                    \
  42     ASM_GENERATE_INTERNAL_LABEL (OUTPUT, temp, LABELNO);                \
  43   } while (0)
  44 #endif
  45
  46 #ifndef ASM_STABD_OP
  47 #define ASM_STABD_OP "\t.stabd\t"
  48 #endif
  49
  50 /* This is how to output an element of a case-vector that is absolute.
  51    Some targets don't use this, but we have to define it anyway.  */
  52
  53 #ifndef ASM_OUTPUT_ADDR_VEC_ELT
  54 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
  55 do { fprintf (FILE, "\t%s\t", ASM_LONG);                                \
  56      ASM_OUTPUT_INTERNAL_LABEL (FILE, "L", (VALUE));                    \
  57      fputc ('\n', FILE);                                                \
  58    } while (0)
  59 #endif
  60
  61 /* Provide default for ASM_OUTPUT_ALTERNATE_LABEL_NAME.  */
  62 #ifndef ASM_OUTPUT_ALTERNATE_LABEL_NAME
  63 #define ASM_OUTPUT_ALTERNATE_LABEL_NAME(FILE,INSN) \
  64 do { ASM_OUTPUT_LABEL(FILE,LABEL_ALTERNATE_NAME (INSN)); } while (0)
  65 #endif
  66
  67 /* choose a reasonable default for ASM_OUTPUT_ASCII.  */
  68
  69 #ifndef ASM_OUTPUT_ASCII
  70 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
  71   do {                                                                        \
  72     FILE *_hide_asm_out_file = (MYFILE);                                      \
  73     const unsigned char *_hide_p = (const unsigned char *) (MYSTRING);        \
  74     int _hide_thissize = (MYLENGTH);                                          \
  75     {                                                                         \
  76       FILE *asm_out_file = _hide_asm_out_file;                                \
  77       const unsigned char *p = _hide_p;                                       \
  78       int thissize = _hide_thissize;                                          \
  79       int i;                                                                  \
  80       fprintf (asm_out_file, "\t.ascii \"");                                  \
  81                                                                               \
  82       for (i = 0; i < thissize; i++)                                          \
  83         {                                                                     \
  84           register int c = p[i];                                              \
  85           if (c == '\"' || c == '\\')                                         \
  86             putc ('\\', asm_out_file);                                        \
  87           if (ISPRINT(c))                                                     \
  88             putc (c, asm_out_file);                                           \
  89           else                                                                \
  90             {                                                                 \
  91               fprintf (asm_out_file, "\\%o", c);                              \
  92               /* After an octal-escape, if a digit follows,                   \
  93                  terminate one string constant and start another.             \
  94                  The Vax assembler fails to stop reading the escape           \
  95                  after three digits, so this is the only way we               \
  96                  can get it to parse the data properly.  */                   \
  97               if (i < thissize - 1 && ISDIGIT(p[i + 1]))                      \
  98                 fprintf (asm_out_file, "\"\n\t.ascii \"");                    \
  99           }                                                                   \
 100         }                                                                     \
 101       fprintf (asm_out_file, "\"\n");                                         \
 102     }                                                                         \
 103   }                                                                           \
 104   while (0)
 105 #endif
 106
 107 #ifndef ASM_IDENTIFY_GCC
 108   /* Default the definition, only if ASM_IDENTIFY_GCC is not set,
 109      because if it is set, we might not want ASM_IDENTIFY_LANGUAGE
 110      outputting labels, if we do want it to, then it must be defined
 111      in the tm.h file.  */
 112 #ifndef ASM_IDENTIFY_LANGUAGE
 113 #define ASM_IDENTIFY_LANGUAGE(FILE) output_lang_identify (FILE);
 114 #endif
 115 #endif
 116
 117 /* This is how we tell the assembler to equate two values.  */
 118 #ifdef SET_ASM_OP
 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");                                           \
 126   } while (0)
 127 #endif
 128 #endif
 129
 130 /* This is how to output a reference to a user-level label named NAME.  */
 131
 132 #ifndef ASM_OUTPUT_LABELREF
 133 #define ASM_OUTPUT_LABELREF(FILE,NAME)  asm_fprintf ((FILE), "%U%s", (NAME))
 134 #endif
 135
 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.  */
 139
 140 #ifndef ASM_OUTPUT_DEBUG_LABEL
 141 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
 142   ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM)
 143 #endif
 144
 145 /* This determines whether or not we support weak symbols.  */
 146 #ifndef SUPPORTS_WEAK
 147 #ifdef ASM_WEAKEN_LABEL
 148 #define SUPPORTS_WEAK 1
 149 #else
 150 #define SUPPORTS_WEAK 0
 151 #endif
 152 #endif
 153
 154 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
 155    provide a weak attribute.  Else define it to nothing.
 156
 157    This would normally belong in gansidecl.h, but SUPPORTS_WEAK is
 158    not available at that time.
 159
 160    Note, this is only for use by target files which we know are to be
 161    compiled by GCC.  */
 162 #ifndef TARGET_ATTRIBUTE_WEAK
 163 # if SUPPORTS_WEAK
 164 #  define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
 165 # else
 166 #  define TARGET_ATTRIBUTE_WEAK
 167 # endif
 168 #endif
 169
 170 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
 171    the rest of the DWARF 2 frame unwind support is also provided.  */
 172 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
 173 #define DWARF2_UNWIND_INFO 1
 174 #endif
 175
 176 #if defined (DWARF2_UNWIND_INFO) && !defined (EH_FRAME_SECTION)
 177 # if defined (EH_FRAME_SECTION_ASM_OP)
 178 #  define EH_FRAME_SECTION() eh_frame_section();
 179 # else
 180    /* If we aren't using crtstuff to run ctors, don't use it for EH.  */
 181 #  if defined (ASM_OUTPUT_SECTION_NAME) && defined (ASM_OUTPUT_CONSTRUCTOR)
 182 #   define EH_FRAME_SECTION_ASM_OP      "\t.section\t.eh_frame,\"aw\""
 183 #   define EH_FRAME_SECTION() \
 184      do { named_section (NULL_TREE, ".eh_frame", 0); } while (0)
 185 #  endif
 186 # endif
 187 #endif
 188
 189 /* By default, we generate a label at the beginning and end of the
 190    text section, and compute the size of the text section by
 191    subtracting the two.  However, on some platforms that doesn't
 192    work, and we use the section itself, rather than a label at the
 193    beginning of it, to indicate the start of the section.  On such
 194    platforms, define this to zero.  */
 195 #ifndef DWARF2_GENERATE_TEXT_SECTION_LABEL
 196 #define DWARF2_GENERATE_TEXT_SECTION_LABEL 1
 197 #endif
 198
 199 /* Supply a default definition for PROMOTE_PROTOTYPES.  */
 200 #ifndef PROMOTE_PROTOTYPES
 201 #define PROMOTE_PROTOTYPES      0
 202 #endif
 203
 204 /* Number of hardware registers that go into the DWARF-2 unwind info.
 205    If not defined, equals FIRST_PSEUDO_REGISTER  */
 206
 207 #ifndef DWARF_FRAME_REGISTERS
 208 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
 209 #endif
 210
 211 /* Default sizes for base C types.  If the sizes are different for
 212    your target, you should override these values by defining the
 213    appropriate symbols in your tm.h file.  */
 214
 215 #ifndef CHAR_TYPE_SIZE
 216 #define CHAR_TYPE_SIZE BITS_PER_UNIT
 217 #endif
 218
 219 #ifndef SHORT_TYPE_SIZE
 220 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
 221 #endif
 222
 223 #ifndef INT_TYPE_SIZE
 224 #define INT_TYPE_SIZE BITS_PER_WORD
 225 #endif
 226
 227 #ifndef LONG_TYPE_SIZE
 228 #define LONG_TYPE_SIZE BITS_PER_WORD
 229 #endif
 230
 231 #ifndef LONG_LONG_TYPE_SIZE
 232 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
 233 #endif
 234
 235 #ifndef WCHAR_TYPE_SIZE
 236 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
 237 #endif
 238
 239 #ifndef WCHAR_UNSIGNED
 240 #define WCHAR_UNSIGNED 0
 241 #endif
 242
 243 #ifndef FLOAT_TYPE_SIZE
 244 #define FLOAT_TYPE_SIZE BITS_PER_WORD
 245 #endif
 246
 247 #ifndef DOUBLE_TYPE_SIZE
 248 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 249 #endif
 250
 251 #ifndef LONG_DOUBLE_TYPE_SIZE
 252 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 253 #endif
 254
 255 #endif  /* GCC_DEFAULTS_H */
 256