gcc/machmode.h

   1 /* Machine mode definitions for GNU C-Compiler; included by rtl.h and tree.h.
   2    Copyright (C) 1991, 1993, 1994, 1996, 1998 Free Software Foundation, Inc.
   3
   4 This file is part of GNU CC.
   5
   6 GNU CC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU CC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU CC; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 #ifndef HAVE_MACHINE_MODES
  22 #define HAVE_MACHINE_MODES
  23
  24 /* Strictly speaking, this isn't the proper place to include these definitions,
  25    but this file is included by every GCC file. */
  26
  27 /* Find the largest host integer type and set its size and type.  */
  28
  29 #ifndef HOST_BITS_PER_WIDE_INT
  30
  31 #if HOST_BITS_PER_LONG > HOST_BITS_PER_INT
  32 #define HOST_BITS_PER_WIDE_INT HOST_BITS_PER_LONG
  33 #define HOST_WIDE_INT long
  34 #else
  35 #define HOST_BITS_PER_WIDE_INT HOST_BITS_PER_INT
  36 #define HOST_WIDE_INT int
  37 #endif
  38
  39 #endif
  40
  41 /* Provide a default way to print an address in hex via printf.  */
  42
  43 #ifndef HOST_PTR_PRINTF
  44 # ifdef HAVE_PRINTF_PTR
  45 #  define HOST_PTR_PRINTF "%p"
  46 # else
  47 #  define HOST_PTR_PRINTF \
  48     (sizeof (int) == sizeof (char *) ? "%x" \
  49      : sizeof (long) == sizeof (char *) ? "%lx" : "%llx")
  50 # endif
  51 #endif /* ! HOST_PTR_PRINTF */
  52
  53 /* Provide defaults for the way to print a HOST_WIDE_INT
  54    in various manners.  */
  55
  56 #ifndef HOST_WIDE_INT_PRINT_DEC
  57 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT
  58 #define HOST_WIDE_INT_PRINT_DEC "%d"
  59 #else
  60 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
  61 #define HOST_WIDE_INT_PRINT_DEC "%ld"
  62 #else
  63 #define HOST_WIDE_INT_PRINT_DEC "%lld"
  64 #endif
  65 #endif
  66 #endif
  67
  68 #ifndef HOST_WIDE_INT_PRINT_UNSIGNED
  69 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT
  70 #define HOST_WIDE_INT_PRINT_UNSIGNED "%u"
  71 #else
  72 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
  73 #define HOST_WIDE_INT_PRINT_UNSIGNED "%lu"
  74 #else
  75 #define HOST_WIDE_INT_PRINT_UNSIGNED "%llu"
  76 #endif
  77 #endif
  78 #endif
  79
  80 #ifndef HOST_WIDE_INT_PRINT_HEX
  81 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT
  82 #define HOST_WIDE_INT_PRINT_HEX "0x%x"
  83 #else
  84 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
  85 #define HOST_WIDE_INT_PRINT_HEX "0x%lx"
  86 #else
  87 #define HOST_WIDE_INT_PRINT_HEX "0x%llx"
  88 #endif
  89 #endif
  90 #endif
  91
  92 #ifndef HOST_WIDE_INT_PRINT_DOUBLE_HEX
  93 #if HOST_BITS_PER_WIDE_INT == 64
  94 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT
  95 #define HOST_WIDE_INT_PRINT_DOUBLE_HEX "0x%x%016x"
  96 #else
  97 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
  98 #define HOST_WIDE_INT_PRINT_DOUBLE_HEX "0x%lx%016lx"
  99 #else
 100 #define HOST_WIDE_INT_PRINT_DOUBLE_HEX "0x%llx%016llx"
 101 #endif
 102 #endif
 103 #else
 104 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT
 105 #define HOST_WIDE_INT_PRINT_DOUBLE_HEX "0x%x%08x"
 106 #else
 107 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
 108 #define HOST_WIDE_INT_PRINT_DOUBLE_HEX "0x%lx%08lx"
 109 #else
 110 #define HOST_WIDE_INT_PRINT_DOUBLE_HEX "0x%llx%08llx"
 111 #endif
 112 #endif
 113 #endif
 114 #endif
 115
 116 /* Make an enum class that gives all the machine modes.  */
 117
 118 #define DEF_MACHMODE(SYM, NAME, TYPE, SIZE, UNIT, WIDER)  SYM,
 119
 120 enum machine_mode {
 121 #include "machmode.def"
 122
 123 #ifdef EXTRA_CC_MODES
 124   EXTRA_CC_MODES,
 125 #endif
 126 MAX_MACHINE_MODE };
 127
 128 #undef DEF_MACHMODE
 129
 130 #ifndef NUM_MACHINE_MODES
 131 #define NUM_MACHINE_MODES (int) MAX_MACHINE_MODE
 132 #endif
 133
 134 /* Get the name of mode MODE as a string.  */
 135
 136 extern char *mode_name[];
 137 #define GET_MODE_NAME(MODE)             (mode_name[(int) (MODE)])
 138
 139 enum mode_class { MODE_RANDOM, MODE_INT, MODE_FLOAT, MODE_PARTIAL_INT, MODE_CC,
 140                   MODE_COMPLEX_INT, MODE_COMPLEX_FLOAT, MAX_MODE_CLASS};
 141
 142 /* Get the general kind of object that mode MODE represents
 143    (integer, floating, complex, etc.)  */
 144
 145 extern enum mode_class mode_class[];
 146 #define GET_MODE_CLASS(MODE)            (mode_class[(int) (MODE)])
 147
 148 /* Nonzero if MODE is an integral mode.  */
 149 #define INTEGRAL_MODE_P(MODE)                   \
 150   (GET_MODE_CLASS (MODE) == MODE_INT            \
 151    || GET_MODE_CLASS (MODE) == MODE_PARTIAL_INT \
 152    || GET_MODE_CLASS (MODE) == MODE_COMPLEX_INT)
 153
 154 /* Nonzero if MODE is a floating-point mode.  */
 155 #define FLOAT_MODE_P(MODE)              \
 156   (GET_MODE_CLASS (MODE) == MODE_FLOAT  \
 157    || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT)
 158
 159 /* Nonzero if MODE is a complex mode.  */
 160 #define COMPLEX_MODE_P(MODE)                    \
 161   (GET_MODE_CLASS (MODE) == MODE_COMPLEX_INT    \
 162    || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT)
 163
 164 /* Get the size in bytes of an object of mode MODE.  */
 165
 166 extern int mode_size[];
 167 #define GET_MODE_SIZE(MODE)             (mode_size[(int) (MODE)])
 168
 169 /* Get the size in bytes of the basic parts of an object of mode MODE.  */
 170
 171 extern int mode_unit_size[];
 172 #define GET_MODE_UNIT_SIZE(MODE)        (mode_unit_size[(int) (MODE)])
 173
 174 /* Get the number of units in the object.  */
 175
 176 #define GET_MODE_NUNITS(MODE)  \
 177   ((GET_MODE_UNIT_SIZE ((MODE)) == 0) ? 0 \
 178    : (GET_MODE_SIZE ((MODE)) / GET_MODE_UNIT_SIZE ((MODE))))
 179
 180 /* Get the size in bits of an object of mode MODE.  */
 181
 182 #define GET_MODE_BITSIZE(MODE)  (BITS_PER_UNIT * mode_size[(int) (MODE)])
 183
 184 /* Get a bitmask containing 1 for all bits in a word
 185    that fit within mode MODE.  */
 186
 187 extern unsigned HOST_WIDE_INT mode_mask_array[];
 188
 189 #define GET_MODE_MASK(MODE) mode_mask_array[(int) (MODE)]
 190
 191 /* Get the next wider natural mode (eg, QI -> HI -> SI -> DI -> TI).  */
 192
 193 extern unsigned char mode_wider_mode[];
 194 #define GET_MODE_WIDER_MODE(MODE)       ((enum machine_mode)mode_wider_mode[(int) (MODE)])
 195
 196 /* Return the mode for data of a given size SIZE and mode class CLASS.
 197    If LIMIT is nonzero, then don't use modes bigger than MAX_FIXED_MODE_SIZE.
 198    The value is BLKmode if no other mode is found.  */
 199
 200 extern enum machine_mode mode_for_size PROTO((unsigned int, enum mode_class, int));
 201
 202 /* Return an integer mode of the exact same size as the input mode,
 203    or BLKmode on failure.  */
 204
 205 extern enum machine_mode int_mode_for_mode PROTO((enum machine_mode));
 206
 207 /* Find the best mode to use to access a bit field.  */
 208
 209 extern enum machine_mode get_best_mode PROTO((int, int, int, enum machine_mode, int));
 210
 211 /* Determine alignment, 1<=result<=BIGGEST_ALIGNMENT.  */
 212
 213 #define GET_MODE_ALIGNMENT(MODE)   \
 214   MIN (BIGGEST_ALIGNMENT,          \
 215        MAX (1, (GET_MODE_UNIT_SIZE (MODE) * BITS_PER_UNIT)))
 216
 217 /* For each class, get the narrowest mode in that class.  */
 218
 219 extern enum machine_mode class_narrowest_mode[];
 220 #define GET_CLASS_NARROWEST_MODE(CLASS) class_narrowest_mode[(int) (CLASS)]
 221
 222 /* Define the integer modes whose sizes are BITS_PER_UNIT and BITS_PER_WORD
 223    and the mode whose class is Pmode and whose size is POINTER_SIZE.  */
 224
 225 extern enum machine_mode byte_mode;
 226 extern enum machine_mode word_mode;
 227 extern enum machine_mode ptr_mode;
 228
 229 #endif /* not HAVE_MACHINE_MODES */