gcc/machmode.h

   1 /* Machine mode definitions for GCC; included by rtl.h and tree.h.
   2    Copyright (C) 1991, 1993, 1994, 1996, 1998, 1999, 2000, 2001, 2003
   3    Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to the Free
  19 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
  20 02110-1301, USA.  */
  21
  22 #ifndef HAVE_MACHINE_MODES
  23 #define HAVE_MACHINE_MODES
  24
  25 /* Make an enum class that gives all the machine modes.  */
  26 #include "insn-modes.h"
  27
  28 /* Get the name of mode MODE as a string.  */
  29
  30 extern const char * const mode_name[NUM_MACHINE_MODES];
  31 #define GET_MODE_NAME(MODE)  mode_name[MODE]
  32
  33 /* Mode classes.  */
  34
  35 #include "mode-classes.def"
  36 #define DEF_MODE_CLASS(M) M
  37 enum mode_class { MODE_CLASSES, MAX_MODE_CLASS };
  38 #undef DEF_MODE_CLASS
  39 #undef MODE_CLASSES
  40
  41 /* Get the general kind of object that mode MODE represents
  42    (integer, floating, complex, etc.)  */
  43
  44 extern const unsigned char mode_class[NUM_MACHINE_MODES];
  45 #define GET_MODE_CLASS(MODE)  mode_class[MODE]
  46
  47 /* Nonzero if MODE is an integral mode.  */
  48 #define INTEGRAL_MODE_P(MODE)                   \
  49   (GET_MODE_CLASS (MODE) == MODE_INT            \
  50    || GET_MODE_CLASS (MODE) == MODE_PARTIAL_INT \
  51    || GET_MODE_CLASS (MODE) == MODE_COMPLEX_INT \
  52    || GET_MODE_CLASS (MODE) == MODE_VECTOR_INT)
  53
  54 /* Nonzero if MODE is a floating-point mode.  */
  55 #define FLOAT_MODE_P(MODE)              \
  56   (GET_MODE_CLASS (MODE) == MODE_FLOAT  \
  57    || GET_MODE_CLASS (MODE) == MODE_DECIMAL_FLOAT \
  58    || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT \
  59    || GET_MODE_CLASS (MODE) == MODE_VECTOR_FLOAT)
  60
  61 /* Nonzero if MODE is a complex mode.  */
  62 #define COMPLEX_MODE_P(MODE)                    \
  63   (GET_MODE_CLASS (MODE) == MODE_COMPLEX_INT    \
  64    || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT)
  65
  66 /* Nonzero if MODE is a vector mode.  */
  67 #define VECTOR_MODE_P(MODE)                     \
  68   (GET_MODE_CLASS (MODE) == MODE_VECTOR_INT     \
  69    || GET_MODE_CLASS (MODE) == MODE_VECTOR_FLOAT        \
  70    || GET_MODE_CLASS (MODE) == MODE_VECTOR_FRACT        \
  71    || GET_MODE_CLASS (MODE) == MODE_VECTOR_UFRACT       \
  72    || GET_MODE_CLASS (MODE) == MODE_VECTOR_ACCUM        \
  73    || GET_MODE_CLASS (MODE) == MODE_VECTOR_UACCUM)
  74
  75 /* Nonzero if MODE is a scalar integral mode.  */
  76 #define SCALAR_INT_MODE_P(MODE)                 \
  77   (GET_MODE_CLASS (MODE) == MODE_INT            \
  78    || GET_MODE_CLASS (MODE) == MODE_PARTIAL_INT)
  79
  80 /* Nonzero if MODE is a scalar floating point mode.  */
  81 #define SCALAR_FLOAT_MODE_P(MODE)               \
  82   (GET_MODE_CLASS (MODE) == MODE_FLOAT          \
  83    || GET_MODE_CLASS (MODE) == MODE_DECIMAL_FLOAT)
  84
  85 /* Nonzero if MODE is a decimal floating point mode.  */
  86 #define DECIMAL_FLOAT_MODE_P(MODE)              \
  87   (GET_MODE_CLASS (MODE) == MODE_DECIMAL_FLOAT)
  88
  89 /* Nonzero if MODE is a scalar fract mode.  */
  90 #define SCALAR_FRACT_MODE_P(MODE)       \
  91   (GET_MODE_CLASS (MODE) == MODE_FRACT)
  92
  93 /* Nonzero if MODE is a scalar ufract mode.  */
  94 #define SCALAR_UFRACT_MODE_P(MODE)      \
  95   (GET_MODE_CLASS (MODE) == MODE_UFRACT)
  96
  97 /* Nonzero if MODE is a scalar fract or ufract mode.  */
  98 #define ALL_SCALAR_FRACT_MODE_P(MODE)   \
  99   (SCALAR_FRACT_MODE_P (MODE) || SCALAR_UFRACT_MODE_P (MODE))
 100
 101 /* Nonzero if MODE is a scalar accum mode.  */
 102 #define SCALAR_ACCUM_MODE_P(MODE)       \
 103   (GET_MODE_CLASS (MODE) == MODE_ACCUM)
 104
 105 /* Nonzero if MODE is a scalar uaccum mode.  */
 106 #define SCALAR_UACCUM_MODE_P(MODE)      \
 107   (GET_MODE_CLASS (MODE) == MODE_UACCUM)
 108
 109 /* Nonzero if MODE is a scalar accum or uaccum mode.  */
 110 #define ALL_SCALAR_ACCUM_MODE_P(MODE)   \
 111   (SCALAR_ACCUM_MODE_P (MODE) || SCALAR_UACCUM_MODE_P (MODE))
 112
 113 /* Nonzero if MODE is a scalar fract or accum mode.  */
 114 #define SIGNED_SCALAR_FIXED_POINT_MODE_P(MODE)  \
 115   (SCALAR_FRACT_MODE_P (MODE) || SCALAR_ACCUM_MODE_P (MODE))
 116
 117 /* Nonzero if MODE is a scalar ufract or uaccum mode.  */
 118 #define UNSIGNED_SCALAR_FIXED_POINT_MODE_P(MODE)        \
 119   (SCALAR_UFRACT_MODE_P (MODE) || SCALAR_UACCUM_MODE_P (MODE))
 120
 121 /* Nonzero if MODE is a scalar fract, ufract, accum or uaccum mode.  */
 122 #define ALL_SCALAR_FIXED_POINT_MODE_P(MODE)     \
 123   (SIGNED_SCALAR_FIXED_POINT_MODE_P (MODE)      \
 124    || UNSIGNED_SCALAR_FIXED_POINT_MODE_P (MODE))
 125
 126 /* Nonzero if MODE is a scalar/vector fract mode.  */
 127 #define FRACT_MODE_P(MODE)              \
 128   (GET_MODE_CLASS (MODE) == MODE_FRACT  \
 129    || GET_MODE_CLASS (MODE) == MODE_VECTOR_FRACT)
 130
 131 /* Nonzero if MODE is a scalar/vector ufract mode.  */
 132 #define UFRACT_MODE_P(MODE)             \
 133   (GET_MODE_CLASS (MODE) == MODE_UFRACT \
 134    || GET_MODE_CLASS (MODE) == MODE_VECTOR_UFRACT)
 135
 136 /* Nonzero if MODE is a scalar/vector fract or ufract mode.  */
 137 #define ALL_FRACT_MODE_P(MODE)          \
 138   (FRACT_MODE_P (MODE) || UFRACT_MODE_P (MODE))
 139
 140 /* Nonzero if MODE is a scalar/vector accum mode.  */
 141 #define ACCUM_MODE_P(MODE)              \
 142   (GET_MODE_CLASS (MODE) == MODE_ACCUM  \
 143    || GET_MODE_CLASS (MODE) == MODE_VECTOR_ACCUM)
 144
 145 /* Nonzero if MODE is a scalar/vector uaccum mode.  */
 146 #define UACCUM_MODE_P(MODE)             \
 147   (GET_MODE_CLASS (MODE) == MODE_UACCUM \
 148    || GET_MODE_CLASS (MODE) == MODE_VECTOR_UACCUM)
 149
 150 /* Nonzero if MODE is a scalar/vector accum or uaccum mode.  */
 151 #define ALL_ACCUM_MODE_P(MODE)          \
 152   (ACCUM_MODE_P (MODE) || UACCUM_MODE_P (MODE))
 153
 154 /* Nonzero if MODE is a scalar/vector fract or accum mode.  */
 155 #define SIGNED_FIXED_POINT_MODE_P(MODE)         \
 156   (FRACT_MODE_P (MODE) || ACCUM_MODE_P (MODE))
 157
 158 /* Nonzero if MODE is a scalar/vector ufract or uaccum mode.  */
 159 #define UNSIGNED_FIXED_POINT_MODE_P(MODE)       \
 160   (UFRACT_MODE_P (MODE) || UACCUM_MODE_P (MODE))
 161
 162 /* Nonzero if MODE is a scalar/vector fract, ufract, accum or uaccum mode.  */
 163 #define ALL_FIXED_POINT_MODE_P(MODE)            \
 164   (SIGNED_FIXED_POINT_MODE_P (MODE)             \
 165    || UNSIGNED_FIXED_POINT_MODE_P (MODE))
 166
 167 /* Nonzero if CLASS modes can be widened.  */
 168 #define CLASS_HAS_WIDER_MODES_P(CLASS)         \
 169   (CLASS == MODE_INT                           \
 170    || CLASS == MODE_FLOAT                      \
 171    || CLASS == MODE_DECIMAL_FLOAT              \
 172    || CLASS == MODE_COMPLEX_FLOAT              \
 173    || CLASS == MODE_FRACT                      \
 174    || CLASS == MODE_UFRACT                     \
 175    || CLASS == MODE_ACCUM                      \
 176    || CLASS == MODE_UACCUM)
 177
 178 /* Get the size in bytes and bits of an object of mode MODE.  */
 179
 180 extern CONST_MODE_SIZE unsigned char mode_size[NUM_MACHINE_MODES];
 181 #define GET_MODE_SIZE(MODE)    ((unsigned short) mode_size[MODE])
 182 #define GET_MODE_BITSIZE(MODE) ((unsigned short) (GET_MODE_SIZE (MODE) * BITS_PER_UNIT))
 183
 184 /* Get the number of value bits of an object of mode MODE.  */
 185 extern const unsigned short mode_precision[NUM_MACHINE_MODES];
 186 #define GET_MODE_PRECISION(MODE)  mode_precision[MODE]
 187
 188 /* Get the number of integral bits of an object of mode MODE.  */
 189 extern CONST_MODE_IBIT unsigned char mode_ibit[NUM_MACHINE_MODES];
 190 #define GET_MODE_IBIT(MODE) mode_ibit[MODE]
 191
 192 /* Get the number of fractional bits of an object of mode MODE.  */
 193 extern CONST_MODE_FBIT unsigned char mode_fbit[NUM_MACHINE_MODES];
 194 #define GET_MODE_FBIT(MODE) mode_fbit[MODE]
 195
 196 /* Get a bitmask containing 1 for all bits in a word
 197    that fit within mode MODE.  */
 198
 199 extern const unsigned HOST_WIDE_INT mode_mask_array[NUM_MACHINE_MODES];
 200
 201 #define GET_MODE_MASK(MODE) mode_mask_array[MODE]
 202
 203 /* Return the mode of the inner elements in a vector.  */
 204
 205 extern const unsigned char mode_inner[NUM_MACHINE_MODES];
 206 #define GET_MODE_INNER(MODE) mode_inner[MODE]
 207
 208 /* Get the size in bytes of the basic parts of an object of mode MODE.  */
 209
 210 #define GET_MODE_UNIT_SIZE(MODE)                \
 211   (GET_MODE_INNER (MODE) == VOIDmode            \
 212    ? GET_MODE_SIZE (MODE)                       \
 213    : GET_MODE_SIZE (GET_MODE_INNER (MODE)))
 214
 215 /* Get the number of units in the object.  */
 216
 217 extern const unsigned char mode_nunits[NUM_MACHINE_MODES];
 218 #define GET_MODE_NUNITS(MODE)  mode_nunits[MODE]
 219
 220 /* Get the next wider natural mode (eg, QI -> HI -> SI -> DI -> TI).  */
 221
 222 extern const unsigned char mode_wider[NUM_MACHINE_MODES];
 223 #define GET_MODE_WIDER_MODE(MODE) mode_wider[MODE]
 224
 225 extern const unsigned char mode_2xwider[NUM_MACHINE_MODES];
 226 #define GET_MODE_2XWIDER_MODE(MODE) mode_2xwider[MODE]
 227
 228 /* Return the mode for data of a given size SIZE and mode class CLASS.
 229    If LIMIT is nonzero, then don't use modes bigger than MAX_FIXED_MODE_SIZE.
 230    The value is BLKmode if no other mode is found.  */
 231
 232 extern enum machine_mode mode_for_size (unsigned int, enum mode_class, int);
 233
 234 /* Similar, but find the smallest mode for a given width.  */
 235
 236 extern enum machine_mode smallest_mode_for_size (unsigned int,
 237                                                  enum mode_class);
 238
 239
 240 /* Return an integer mode of the exact same size as the input mode,
 241    or BLKmode on failure.  */
 242
 243 extern enum machine_mode int_mode_for_mode (enum machine_mode);
 244
 245 /* Find the best mode to use to access a bit field.  */
 246
 247 extern enum machine_mode get_best_mode (int, int, unsigned int,
 248                                         enum machine_mode, int);
 249
 250 /* Determine alignment, 1<=result<=BIGGEST_ALIGNMENT.  */
 251
 252 extern CONST_MODE_BASE_ALIGN unsigned char mode_base_align[NUM_MACHINE_MODES];
 253
 254 extern unsigned get_mode_alignment (enum machine_mode);
 255
 256 #define GET_MODE_ALIGNMENT(MODE) get_mode_alignment (MODE)
 257
 258 /* For each class, get the narrowest mode in that class.  */
 259
 260 extern const unsigned char class_narrowest_mode[MAX_MODE_CLASS];
 261 #define GET_CLASS_NARROWEST_MODE(CLASS) class_narrowest_mode[CLASS]
 262
 263 /* Define the integer modes whose sizes are BITS_PER_UNIT and BITS_PER_WORD
 264    and the mode whose class is Pmode and whose size is POINTER_SIZE.  */
 265
 266 extern enum machine_mode byte_mode;
 267 extern enum machine_mode word_mode;
 268 extern enum machine_mode ptr_mode;
 269
 270 /* Target-dependent machine mode initialization - in insn-modes.c.  */
 271 extern void init_adjust_machine_modes (void);
 272
 273 #endif /* not HAVE_MACHINE_MODES */