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 5This file is part of GCC. 6 7GCC is free software; you can redistribute it and/or modify it under 8the terms of the GNU General Public License as published by the Free 9Software Foundation; either version 2, or (at your option) any later 10version. 11 12GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13WARRANTY; without even the implied warranty of MERCHANTABILITY or 14FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15for more details. 16 17You should have received a copy of the GNU General Public License 18along with GCC; see the file COPYING. If not, write to the Free 19Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 2002110-1301, 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 30extern 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 37enum 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 44extern 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_COMPLEX_FLOAT \ 58 || GET_MODE_CLASS (MODE) == MODE_VECTOR_FLOAT) 59 60/* Nonzero if MODE is a complex mode. */ 61#define COMPLEX_MODE_P(MODE) \ 62 (GET_MODE_CLASS (MODE) == MODE_COMPLEX_INT \ 63 || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT) 64 65/* Nonzero if MODE is a vector mode. */ 66#define VECTOR_MODE_P(MODE) \ 67 (GET_MODE_CLASS (MODE) == MODE_VECTOR_INT \ 68 || GET_MODE_CLASS (MODE) == MODE_VECTOR_FLOAT) 69 70/* Nonzero if MODE is a scalar integral mode. */ 71#define SCALAR_INT_MODE_P(MODE) \ 72 (GET_MODE_CLASS (MODE) == MODE_INT \ 73 || GET_MODE_CLASS (MODE) == MODE_PARTIAL_INT) 74 75/* Nonzero if MODE is a scalar floating point mode. */ 76#define SCALAR_FLOAT_MODE_P(MODE) \ 77 (GET_MODE_CLASS (MODE) == MODE_FLOAT) 78 79/* Get the size in bytes and bits of an object of mode MODE. */ 80 81extern CONST_MODE_SIZE unsigned char mode_size[NUM_MACHINE_MODES]; 82#define GET_MODE_SIZE(MODE) ((unsigned short) mode_size[MODE]) 83#define GET_MODE_BITSIZE(MODE) ((unsigned short) (GET_MODE_SIZE (MODE) * BITS_PER_UNIT)) 84 85/* Get the number of value bits of an object of mode MODE. */ 86extern const unsigned short mode_precision[NUM_MACHINE_MODES]; 87#define GET_MODE_PRECISION(MODE) mode_precision[MODE] 88 89/* Get a bitmask containing 1 for all bits in a word 90 that fit within mode MODE. */ 91 92extern const unsigned HOST_WIDE_INT mode_mask_array[NUM_MACHINE_MODES]; 93 94#define GET_MODE_MASK(MODE) mode_mask_array[MODE] 95 96/* Return the mode of the inner elements in a vector. */ 97 98extern const unsigned char mode_inner[NUM_MACHINE_MODES]; 99#define GET_MODE_INNER(MODE) mode_inner[MODE] 100 101/* Get the size in bytes of the basic parts of an object of mode MODE. */ 102 103#define GET_MODE_UNIT_SIZE(MODE) \ 104 (GET_MODE_INNER (MODE) == VOIDmode \ 105 ? GET_MODE_SIZE (MODE) \ 106 : GET_MODE_SIZE (GET_MODE_INNER (MODE))) 107 108/* Get the number of units in the object. */ 109 110extern const unsigned char mode_nunits[NUM_MACHINE_MODES]; 111#define GET_MODE_NUNITS(MODE) mode_nunits[MODE] 112 113/* Get the next wider natural mode (eg, QI -> HI -> SI -> DI -> TI). */ 114 115extern const unsigned char mode_wider[NUM_MACHINE_MODES]; 116#define GET_MODE_WIDER_MODE(MODE) mode_wider[MODE] 117 118extern const unsigned char mode_2xwider[NUM_MACHINE_MODES]; 119#define GET_MODE_2XWIDER_MODE(MODE) mode_2xwider[MODE] 120 121/* Return the mode for data of a given size SIZE and mode class CLASS. 122 If LIMIT is nonzero, then don't use modes bigger than MAX_FIXED_MODE_SIZE. 123 The value is BLKmode if no other mode is found. */ 124 125extern enum machine_mode mode_for_size (unsigned int, enum mode_class, int); 126 127/* Similar, but find the smallest mode for a given width. */ 128 129extern enum machine_mode smallest_mode_for_size (unsigned int, 130 enum mode_class); 131 132 133/* Return an integer mode of the exact same size as the input mode, 134 or BLKmode on failure. */ 135 136extern enum machine_mode int_mode_for_mode (enum machine_mode); 137 138/* Find the best mode to use to access a bit field. */ 139 140extern enum machine_mode get_best_mode (int, int, unsigned int, 141 enum machine_mode, int); 142 143/* Determine alignment, 1<=result<=BIGGEST_ALIGNMENT. */ 144 145extern CONST_MODE_BASE_ALIGN unsigned char mode_base_align[NUM_MACHINE_MODES]; 146 147extern unsigned get_mode_alignment (enum machine_mode); 148 149#define GET_MODE_ALIGNMENT(MODE) get_mode_alignment (MODE) 150 151/* For each class, get the narrowest mode in that class. */ 152 153extern const unsigned char class_narrowest_mode[MAX_MODE_CLASS]; 154#define GET_CLASS_NARROWEST_MODE(CLASS) class_narrowest_mode[CLASS] 155 156/* Define the integer modes whose sizes are BITS_PER_UNIT and BITS_PER_WORD 157 and the mode whose class is Pmode and whose size is POINTER_SIZE. */ 158 159extern enum machine_mode byte_mode; 160extern enum machine_mode word_mode; 161extern enum machine_mode ptr_mode; 162 163/* Target-dependent machine mode initialization - in insn-modes.c. */ 164extern void init_adjust_machine_modes (void); 165 166#endif /* not HAVE_MACHINE_MODES */ 167