163 lines
5.5 KiB
C
163 lines
5.5 KiB
C
/* Machine mode definitions for GNU C-Compiler; included by rtl.h and tree.h.
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Copyright (C) 1991, 1993, 1994, 1996, 1998, 1999, 2000, 2001
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Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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#ifndef HAVE_MACHINE_MODES
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#define HAVE_MACHINE_MODES
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/* Make an enum class that gives all the machine modes. */
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#define DEF_MACHMODE(SYM, NAME, TYPE, BITSIZE, SIZE, UNIT, WIDER) SYM,
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enum machine_mode {
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#include "machmode.def"
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MAX_MACHINE_MODE };
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#undef DEF_MACHMODE
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#ifndef NUM_MACHINE_MODES
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#define NUM_MACHINE_MODES (int) MAX_MACHINE_MODE
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#endif
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/* Get the name of mode MODE as a string. */
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extern const char * const mode_name[NUM_MACHINE_MODES];
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#define GET_MODE_NAME(MODE) (mode_name[(int) (MODE)])
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enum mode_class { MODE_RANDOM, MODE_INT, MODE_FLOAT, MODE_PARTIAL_INT, MODE_CC,
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MODE_COMPLEX_INT, MODE_COMPLEX_FLOAT,
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MODE_VECTOR_INT, MODE_VECTOR_FLOAT,
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MAX_MODE_CLASS};
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/* Get the general kind of object that mode MODE represents
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(integer, floating, complex, etc.) */
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extern const enum mode_class mode_class[NUM_MACHINE_MODES];
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#define GET_MODE_CLASS(MODE) (mode_class[(int) (MODE)])
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/* Nonzero if MODE is an integral mode. */
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#define INTEGRAL_MODE_P(MODE) \
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(GET_MODE_CLASS (MODE) == MODE_INT \
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|| GET_MODE_CLASS (MODE) == MODE_PARTIAL_INT \
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|| GET_MODE_CLASS (MODE) == MODE_COMPLEX_INT \
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|| GET_MODE_CLASS (MODE) == MODE_VECTOR_INT)
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/* Nonzero if MODE is a floating-point mode. */
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#define FLOAT_MODE_P(MODE) \
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(GET_MODE_CLASS (MODE) == MODE_FLOAT \
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|| GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT \
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|| GET_MODE_CLASS (MODE) == MODE_VECTOR_FLOAT)
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/* Nonzero if MODE is a complex mode. */
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#define COMPLEX_MODE_P(MODE) \
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(GET_MODE_CLASS (MODE) == MODE_COMPLEX_INT \
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|| GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT)
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/* Nonzero if MODE is a vector mode. */
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#define VECTOR_MODE_P(MODE) \
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(GET_MODE_CLASS (MODE) == MODE_VECTOR_INT \
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|| GET_MODE_CLASS (MODE) == MODE_VECTOR_FLOAT)
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/* Get the size in bytes of an object of mode MODE. */
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extern const unsigned char mode_size[NUM_MACHINE_MODES];
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#define GET_MODE_SIZE(MODE) (mode_size[(int) (MODE)])
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/* Get the size in bytes of the basic parts of an object of mode MODE. */
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extern const unsigned char mode_unit_size[NUM_MACHINE_MODES];
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#define GET_MODE_UNIT_SIZE(MODE) (mode_unit_size[(int) (MODE)])
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/* Get the number of units in the object. */
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#define GET_MODE_NUNITS(MODE) \
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((GET_MODE_UNIT_SIZE ((MODE)) == 0) ? 0 \
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: (GET_MODE_SIZE ((MODE)) / GET_MODE_UNIT_SIZE ((MODE))))
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/* Get the size in bits of an object of mode MODE. */
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extern const unsigned short mode_bitsize[NUM_MACHINE_MODES];
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#define GET_MODE_BITSIZE(MODE) (mode_bitsize[(int) (MODE)])
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#endif /* not HAVE_MACHINE_MODES */
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#if defined HOST_WIDE_INT && ! defined GET_MODE_MASK
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/* Get a bitmask containing 1 for all bits in a word
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that fit within mode MODE. */
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extern const unsigned HOST_WIDE_INT mode_mask_array[NUM_MACHINE_MODES];
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#define GET_MODE_MASK(MODE) mode_mask_array[(int) (MODE)]
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#endif /* defined (HOST_WIDE_INT) && ! defined GET_MODE_MASK */
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#if ! defined GET_MODE_WIDER_MODE || ! defined GET_MODE_ALIGNMENT \
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|| ! defined GET_CLASS_NARROWEST_MODE
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/* Get the next wider natural mode (eg, QI -> HI -> SI -> DI -> TI). */
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extern const unsigned char mode_wider_mode[NUM_MACHINE_MODES];
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#define GET_MODE_WIDER_MODE(MODE) ((enum machine_mode)mode_wider_mode[(int) (MODE)])
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/* Return the mode for data of a given size SIZE and mode class CLASS.
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If LIMIT is nonzero, then don't use modes bigger than MAX_FIXED_MODE_SIZE.
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The value is BLKmode if no other mode is found. */
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extern enum machine_mode mode_for_size PARAMS ((unsigned int,
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enum mode_class, int));
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/* Similar, but find the smallest mode for a given width. */
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extern enum machine_mode smallest_mode_for_size
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PARAMS ((unsigned int, enum mode_class));
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/* Return an integer mode of the exact same size as the input mode,
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or BLKmode on failure. */
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extern enum machine_mode int_mode_for_mode PARAMS ((enum machine_mode));
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/* Find the best mode to use to access a bit field. */
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extern enum machine_mode get_best_mode PARAMS ((int, int, unsigned int,
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enum machine_mode, int));
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/* Determine alignment, 1<=result<=BIGGEST_ALIGNMENT. */
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extern unsigned get_mode_alignment PARAMS ((enum machine_mode));
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#define GET_MODE_ALIGNMENT(MODE) get_mode_alignment (MODE)
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/* For each class, get the narrowest mode in that class. */
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extern const enum machine_mode class_narrowest_mode[(int) MAX_MODE_CLASS];
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#define GET_CLASS_NARROWEST_MODE(CLASS) class_narrowest_mode[(int) (CLASS)]
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/* Define the integer modes whose sizes are BITS_PER_UNIT and BITS_PER_WORD
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and the mode whose class is Pmode and whose size is POINTER_SIZE. */
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extern enum machine_mode byte_mode;
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extern enum machine_mode word_mode;
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extern enum machine_mode ptr_mode;
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#endif /* ! defined GET_MODE_WIDER_MODE || ! defined GET_MODE_ALIGNMENT
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|| ! defined GET_CLASS_NARROWEST_MODE */
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