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- /* Machine mode definitions for GNU C-Compiler; included by rtl.h and tree.h.
- Copyright (C) 1991 Free Software Foundation, Inc.
-
- This file is part of GNU CC.
-
- GNU CC is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- GNU CC is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU CC; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-
- #ifndef HAVE_MACHINE_MODES
-
- /* Strictly speaking, this isn't the proper place to include these definitions,
- but this file is included by every GCC file.
-
- Some systems define these in, e.g., param.h. We undefine these names
- here to avoid the warnings. We prefer to use our definitions since we
- know they are correct. */
-
- #undef MIN
- #undef MAX
-
- #define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
- #define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
-
- /* Find the largest host integer type and set its size and type. */
-
- #ifndef HOST_BITS_PER_WIDE_INT
-
- #if HOST_BITS_PER_LONG > HOST_BITS_PER_INT
- #define HOST_BITS_PER_WIDE_INT HOST_BITS_PER_LONG
- #define HOST_WIDE_INT long
- #else
- #define HOST_BITS_PER_WIDE_INT HOST_BITS_PER_INT
- #define HOST_WIDE_INT int
- #endif
-
- #endif
-
- /* Define the number of entries in an 8-bit `shorts' array needed to represent
- the largest supported constant, which is twice the width of the largest
- host integer type. */
-
- #ifndef MAX_SHORTS
- #define MAX_SHORTS (HOST_BITS_PER_WIDE_INT * 2 / 8)
- #endif
-
- /* Provide a default way to print an address in hex via printf. */
-
- #ifndef HOST_PTR_PRINTF
- #define HOST_PTR_PRINTF sizeof (int) == sizeof (char *) ? "%x" : "%lx"
- #endif
-
- /* Make an enum class that gives all the machine modes. */
-
- #define DEF_MACHMODE(SYM, NAME, TYPE, SIZE, UNIT, WIDER) SYM,
-
- enum machine_mode {
- #include "machmode.def"
-
- #ifdef EXTRA_CC_MODES
- EXTRA_CC_MODES,
- #endif
- MAX_MACHINE_MODE };
-
- #undef DEF_MACHMODE
-
- #define HAVE_MACHINE_MODES
-
- #ifndef NUM_MACHINE_MODES
- #define NUM_MACHINE_MODES (int) MAX_MACHINE_MODE
- #endif
-
- /* Get the name of mode MODE as a string. */
-
- extern char * const mode_name[];
- #define GET_MODE_NAME(MODE) (mode_name[(int)(MODE)])
-
- enum mode_class { MODE_RANDOM, MODE_INT, MODE_FLOAT, MODE_PARTIAL_INT, MODE_CC,
- MODE_COMPLEX_INT, MODE_COMPLEX_FLOAT, MAX_MODE_CLASS};
-
- /* Get the general kind of object that mode MODE represents
- (integer, floating, complex, etc.) */
-
- extern const enum mode_class mode_class[];
- #define GET_MODE_CLASS(MODE) (mode_class[(int)(MODE)])
-
- /* Get the size in bytes of an object of mode MODE. */
-
- extern const int mode_size[];
- #define GET_MODE_SIZE(MODE) (mode_size[(int)(MODE)])
-
- /* Get the size in bytes of the basic parts of an object of mode MODE. */
-
- extern const int mode_unit_size[];
- #define GET_MODE_UNIT_SIZE(MODE) (mode_unit_size[(int)(MODE)])
-
- /* Get the number of units in the object. */
-
- #define GET_MODE_NUNITS(MODE) \
- ((GET_MODE_UNIT_SIZE ((MODE)) == 0) ? 0 \
- : (GET_MODE_SIZE ((MODE)) / GET_MODE_UNIT_SIZE ((MODE))))
-
- /* Get the size in bits of an object of mode MODE. */
-
- #define GET_MODE_BITSIZE(MODE) (BITS_PER_UNIT * mode_size[(int)(MODE)])
-
- /* Get a bitmask containing 1 for all bits in a word
- that fit within mode MODE. */
-
- #define GET_MODE_MASK(MODE) \
- ((GET_MODE_BITSIZE (MODE) >= HOST_BITS_PER_WIDE_INT) \
- ?(HOST_WIDE_INT) ~0 : (((HOST_WIDE_INT) 1 << GET_MODE_BITSIZE (MODE)) - 1))
-
- /* Get the next wider natural mode (eg, QI -> HI -> SI -> DI -> TI). */
-
- extern const enum machine_mode mode_wider_mode[];
- #define GET_MODE_WIDER_MODE(MODE) (mode_wider_mode[(int)(MODE)])
-
- /* Return the mode for data of a given size SIZE and mode class CLASS.
- If LIMIT is nonzero, then don't use modes bigger than MAX_FIXED_MODE_SIZE.
- The value is BLKmode if no other mode is found. */
-
- extern enum machine_mode mode_for_size ();
-
- /* Find the best mode to use to access a bit field. */
-
- extern enum machine_mode get_best_mode ();
-
- /* Determine alignment, 1<=result<=BIGGEST_ALIGNMENT. */
-
- #define GET_MODE_ALIGNMENT(MODE) \
- MIN (BIGGEST_ALIGNMENT, \
- MAX (1, (GET_MODE_UNIT_SIZE (MODE) * BITS_PER_UNIT)))
-
- /* For each class, get the narrowest mode in that class. */
-
- extern enum machine_mode class_narrowest_mode[];
- #define GET_CLASS_NARROWEST_MODE(CLASS) class_narrowest_mode[(int)(CLASS)]
-
- /* Define the integer modes whose sizes are BITS_PER_UNIT
- and BITS_PER_WORD. */
-
- extern enum machine_mode byte_mode;
- extern enum machine_mode word_mode;
-
- #endif /* not HAVE_MACHINE_MODES */
-