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 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 94 extern 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. */ 99 extern 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. */ 104 105 extern 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. */ 110 111 extern 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. */ 122 123 extern 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). */ 127 128 extern const unsigned char mode_wider[NUM_MACHINE_MODES]; 129 #define GET_MODE_WIDER_MODE(MODE) mode_wider[MODE] 130 131 extern 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. */ 137 138 extern enum machine_mode mode_for_size (unsigned int, enum mode_class, int); 139 140 /* Similar, but find the smallest mode for a given width. */ 141 142 extern 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. */ 148 149 extern enum machine_mode int_mode_for_mode (enum machine_mode); 150 151 /* Find the best mode to use to access a bit field. */ 152 153 extern enum machine_mode get_best_mode (int, int, unsigned int, 154 enum machine_mode, int); 155 156 /* Determine alignment, 1<=result<=BIGGEST_ALIGNMENT. */ 157 158 extern CONST_MODE_BASE_ALIGN unsigned char mode_base_align[NUM_MACHINE_MODES]; 159 160 extern 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. */ 165 166 extern 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. */ 171 172 extern enum machine_mode byte_mode; 173 extern enum machine_mode word_mode; 174 extern enum machine_mode ptr_mode; 175 176 /* Target-dependent machine mode initialization - in insn-modes.c. */ 177 extern void init_adjust_machine_modes (void); 178 179 #endif /* not HAVE_MACHINE_MODES */ 180