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_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 71/* Nonzero if MODE is a scalar integral mode. */ 72#define SCALAR_INT_MODE_P(MODE) \ 73 (GET_MODE_CLASS (MODE) == MODE_INT \ 74 || GET_MODE_CLASS (MODE) == MODE_PARTIAL_INT) 75 76/* Nonzero if MODE is a scalar floating point mode. */ 77#define SCALAR_FLOAT_MODE_P(MODE) \ 78 (GET_MODE_CLASS (MODE) == MODE_FLOAT \ 79 || GET_MODE_CLASS (MODE) == MODE_DECIMAL_FLOAT) 80 81/* Nonzero if MODE is a decimal floating point mode. */ 82#define DECIMAL_FLOAT_MODE_P(MODE) \ 83 (GET_MODE_CLASS (MODE) == MODE_DECIMAL_FLOAT) 84 85/* Nonzero if CLASS modes can be widened. */ 86#define CLASS_HAS_WIDER_MODES_P(CLASS) \ 87 (CLASS == MODE_INT \ 88 || CLASS == MODE_FLOAT \ 89 || CLASS == MODE_DECIMAL_FLOAT \ 90 || CLASS == MODE_COMPLEX_FLOAT) 91 92/* Get the size in bytes and bits of an object of mode MODE. */ 93 94extern CONST_MODE_SIZE unsigned char mode_size[NUM_MACHINE_MODES]; 95#define GET_MODE_SIZE(MODE) ((unsigned short) mode_size[MODE]) 96#define GET_MODE_BITSIZE(MODE) ((unsigned short) (GET_MODE_SIZE (MODE) * BITS_PER_UNIT)) 97 98/* Get the number of value bits of an object of mode MODE. */ 99extern const unsigned short mode_precision[NUM_MACHINE_MODES]; 100#define GET_MODE_PRECISION(MODE) mode_precision[MODE] 101 102/* Get a bitmask containing 1 for all bits in a word 103 that fit within mode MODE. */ 104 105extern const unsigned HOST_WIDE_INT mode_mask_array[NUM_MACHINE_MODES]; 106 107#define GET_MODE_MASK(MODE) mode_mask_array[MODE] 108 109/* Return the mode of the inner elements in a vector. */ 110 111extern const unsigned char mode_inner[NUM_MACHINE_MODES]; 112#define GET_MODE_INNER(MODE) mode_inner[MODE] 113 114/* Get the size in bytes of the basic parts of an object of mode MODE. */ 115 116#define GET_MODE_UNIT_SIZE(MODE) \ 117 (GET_MODE_INNER (MODE) == VOIDmode \ 118 ? GET_MODE_SIZE (MODE) \ 119 : GET_MODE_SIZE (GET_MODE_INNER (MODE))) 120 121/* Get the number of units in the object. */ 122 123extern const unsigned char mode_nunits[NUM_MACHINE_MODES]; 124#define GET_MODE_NUNITS(MODE) mode_nunits[MODE] 125 126/* Get the next wider natural mode (eg, QI -> HI -> SI -> DI -> TI). */ 127 128extern const unsigned char mode_wider[NUM_MACHINE_MODES]; 129#define GET_MODE_WIDER_MODE(MODE) mode_wider[MODE] 130 131extern const unsigned char mode_2xwider[NUM_MACHINE_MODES]; 132#define GET_MODE_2XWIDER_MODE(MODE) mode_2xwider[MODE] 133 134/* Return the mode for data of a given size SIZE and mode class CLASS. 135 If LIMIT is nonzero, then don't use modes bigger than MAX_FIXED_MODE_SIZE. 136 The value is BLKmode if no other mode is found. */ 137 138extern enum machine_mode mode_for_size (unsigned int, enum mode_class, int); 139 140/* Similar, but find the smallest mode for a given width. */ 141 142extern enum machine_mode smallest_mode_for_size (unsigned int, 143 enum mode_class); 144 145 146/* Return an integer mode of the exact same size as the input mode, 147 or BLKmode on failure. */ 148 149extern enum machine_mode int_mode_for_mode (enum machine_mode); 150 151/* Find the best mode to use to access a bit field. */ 152 153extern enum machine_mode get_best_mode (int, int, unsigned int, 154 enum machine_mode, int); 155 156/* Determine alignment, 1<=result<=BIGGEST_ALIGNMENT. */ 157 158extern CONST_MODE_BASE_ALIGN unsigned char mode_base_align[NUM_MACHINE_MODES]; 159 160extern unsigned get_mode_alignment (enum machine_mode); 161 162#define GET_MODE_ALIGNMENT(MODE) get_mode_alignment (MODE) 163 164/* For each class, get the narrowest mode in that class. */ 165 166extern const unsigned char class_narrowest_mode[MAX_MODE_CLASS]; 167#define GET_CLASS_NARROWEST_MODE(CLASS) class_narrowest_mode[CLASS] 168 169/* Define the integer modes whose sizes are BITS_PER_UNIT and BITS_PER_WORD 170 and the mode whose class is Pmode and whose size is POINTER_SIZE. */ 171 172extern enum machine_mode byte_mode; 173extern enum machine_mode word_mode; 174extern enum machine_mode ptr_mode; 175 176/* Target-dependent machine mode initialization - in insn-modes.c. */ 177extern void init_adjust_machine_modes (void); 178 179#endif /* not HAVE_MACHINE_MODES */ 180