[8833] | 1 | /* Machine mode definitions for GNU C-Compiler; included by rtl.h and tree.h. |
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| 2 | Copyright (C) 1991, 1993, 1994 Free Software Foundation, Inc. |
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| 3 | |
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| 4 | This file is part of GNU CC. |
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| 5 | |
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| 6 | GNU CC is free software; you can redistribute it and/or modify |
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| 7 | it under the terms of the GNU General Public License as published by |
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| 8 | the Free Software Foundation; either version 2, or (at your option) |
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| 9 | any later version. |
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| 10 | |
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| 11 | GNU CC is distributed in the hope that it will be useful, |
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 14 | GNU General Public License for more details. |
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| 15 | |
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| 16 | You should have received a copy of the GNU General Public License |
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| 17 | along with GNU CC; see the file COPYING. If not, write to |
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| 18 | the Free Software Foundation, 59 Temple Place - Suite 330, |
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| 19 | Boston, MA 02111-1307, USA. */ |
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| 20 | |
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| 21 | |
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| 22 | /* Add prototype support. */ |
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| 23 | #ifndef PROTO |
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| 24 | #if defined (USE_PROTOTYPES) ? USE_PROTOTYPES : defined (__STDC__) |
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| 25 | #define PROTO(ARGS) ARGS |
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| 26 | #else |
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| 27 | #define PROTO(ARGS) () |
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| 28 | #endif |
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| 29 | #endif |
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| 30 | |
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| 31 | #ifndef HAVE_MACHINE_MODES |
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| 32 | |
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| 33 | /* Strictly speaking, this isn't the proper place to include these definitions, |
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| 34 | but this file is included by every GCC file. |
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| 35 | |
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| 36 | Some systems define these in, e.g., param.h. We undefine these names |
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| 37 | here to avoid the warnings. We prefer to use our definitions since we |
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| 38 | know they are correct. */ |
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| 39 | |
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| 40 | #undef MIN |
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| 41 | #undef MAX |
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| 42 | |
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| 43 | #define MIN(X,Y) ((X) < (Y) ? (X) : (Y)) |
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| 44 | #define MAX(X,Y) ((X) > (Y) ? (X) : (Y)) |
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| 45 | |
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| 46 | /* Find the largest host integer type and set its size and type. */ |
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| 47 | |
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| 48 | #ifndef HOST_BITS_PER_WIDE_INT |
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| 49 | |
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| 50 | #if HOST_BITS_PER_LONG > HOST_BITS_PER_INT |
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| 51 | #define HOST_BITS_PER_WIDE_INT HOST_BITS_PER_LONG |
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| 52 | #define HOST_WIDE_INT long |
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| 53 | #else |
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| 54 | #define HOST_BITS_PER_WIDE_INT HOST_BITS_PER_INT |
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| 55 | #define HOST_WIDE_INT int |
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| 56 | #endif |
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| 57 | |
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| 58 | #endif |
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| 59 | |
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| 60 | /* Provide a default way to print an address in hex via printf. */ |
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| 61 | |
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| 62 | #ifndef HOST_PTR_PRINTF |
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| 63 | #define HOST_PTR_PRINTF sizeof (int) == sizeof (char *) ? "%x" : "%lx" |
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| 64 | #endif |
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| 65 | |
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| 66 | /* Make an enum class that gives all the machine modes. */ |
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| 67 | |
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| 68 | #define DEF_MACHMODE(SYM, NAME, TYPE, SIZE, UNIT, WIDER) SYM, |
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| 69 | |
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| 70 | enum machine_mode { |
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| 71 | #include "machmode.def" |
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| 72 | |
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| 73 | #ifdef EXTRA_CC_MODES |
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| 74 | EXTRA_CC_MODES, |
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| 75 | #endif |
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| 76 | MAX_MACHINE_MODE }; |
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| 77 | |
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| 78 | #undef DEF_MACHMODE |
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| 79 | |
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| 80 | #define HAVE_MACHINE_MODES |
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| 81 | |
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| 82 | #ifndef NUM_MACHINE_MODES |
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| 83 | #define NUM_MACHINE_MODES (int) MAX_MACHINE_MODE |
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| 84 | #endif |
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| 85 | |
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| 86 | /* Get the name of mode MODE as a string. */ |
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| 87 | |
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| 88 | extern char *mode_name[]; |
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| 89 | #define GET_MODE_NAME(MODE) (mode_name[(int)(MODE)]) |
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| 90 | |
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| 91 | enum mode_class { MODE_RANDOM, MODE_INT, MODE_FLOAT, MODE_PARTIAL_INT, MODE_CC, |
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| 92 | MODE_COMPLEX_INT, MODE_COMPLEX_FLOAT, MAX_MODE_CLASS}; |
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| 93 | |
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| 94 | /* Get the general kind of object that mode MODE represents |
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| 95 | (integer, floating, complex, etc.) */ |
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| 96 | |
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| 97 | extern enum mode_class mode_class[]; |
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| 98 | #define GET_MODE_CLASS(MODE) (mode_class[(int)(MODE)]) |
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| 99 | |
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| 100 | /* Nonzero if MODE is an integral mode. */ |
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| 101 | #define INTEGRAL_MODE_P(MODE) \ |
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| 102 | (GET_MODE_CLASS (MODE) == MODE_INT \ |
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| 103 | || GET_MODE_CLASS (MODE) == MODE_PARTIAL_INT \ |
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| 104 | || GET_MODE_CLASS (MODE) == MODE_COMPLEX_INT) |
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| 105 | |
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| 106 | /* Nonzero if MODE is a floating-point mode. */ |
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| 107 | #define FLOAT_MODE_P(MODE) \ |
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| 108 | (GET_MODE_CLASS (MODE) == MODE_FLOAT \ |
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| 109 | || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT) |
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| 110 | |
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| 111 | /* Get the size in bytes of an object of mode MODE. */ |
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| 112 | |
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| 113 | extern int mode_size[]; |
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| 114 | #define GET_MODE_SIZE(MODE) (mode_size[(int)(MODE)]) |
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| 115 | |
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| 116 | /* Get the size in bytes of the basic parts of an object of mode MODE. */ |
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| 117 | |
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| 118 | extern int mode_unit_size[]; |
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| 119 | #define GET_MODE_UNIT_SIZE(MODE) (mode_unit_size[(int)(MODE)]) |
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| 120 | |
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| 121 | /* Get the number of units in the object. */ |
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| 122 | |
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| 123 | #define GET_MODE_NUNITS(MODE) \ |
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| 124 | ((GET_MODE_UNIT_SIZE ((MODE)) == 0) ? 0 \ |
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| 125 | : (GET_MODE_SIZE ((MODE)) / GET_MODE_UNIT_SIZE ((MODE)))) |
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| 126 | |
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| 127 | /* Get the size in bits of an object of mode MODE. */ |
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| 128 | |
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| 129 | #define GET_MODE_BITSIZE(MODE) (BITS_PER_UNIT * mode_size[(int)(MODE)]) |
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| 130 | |
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| 131 | /* Get a bitmask containing 1 for all bits in a word |
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| 132 | that fit within mode MODE. */ |
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| 133 | |
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| 134 | #define GET_MODE_MASK(MODE) \ |
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| 135 | ((GET_MODE_BITSIZE (MODE) >= HOST_BITS_PER_WIDE_INT) \ |
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| 136 | ?(HOST_WIDE_INT) ~0 : (((HOST_WIDE_INT) 1 << GET_MODE_BITSIZE (MODE)) - 1)) |
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| 137 | |
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| 138 | /* Get the next wider natural mode (eg, QI -> HI -> SI -> DI -> TI). */ |
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| 139 | |
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| 140 | extern enum machine_mode mode_wider_mode[]; |
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| 141 | #define GET_MODE_WIDER_MODE(MODE) (mode_wider_mode[(int)(MODE)]) |
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| 142 | |
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| 143 | /* Return the mode for data of a given size SIZE and mode class CLASS. |
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| 144 | If LIMIT is nonzero, then don't use modes bigger than MAX_FIXED_MODE_SIZE. |
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| 145 | The value is BLKmode if no other mode is found. */ |
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| 146 | |
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| 147 | extern enum machine_mode mode_for_size PROTO((unsigned int, enum mode_class, int)); |
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| 148 | |
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| 149 | /* Find the best mode to use to access a bit field. */ |
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| 150 | |
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| 151 | extern enum machine_mode get_best_mode PROTO((int, int, int, enum machine_mode, int)); |
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| 152 | |
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| 153 | /* Determine alignment, 1<=result<=BIGGEST_ALIGNMENT. */ |
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| 154 | |
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| 155 | #define GET_MODE_ALIGNMENT(MODE) \ |
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| 156 | MIN (BIGGEST_ALIGNMENT, \ |
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| 157 | MAX (1, (GET_MODE_UNIT_SIZE (MODE) * BITS_PER_UNIT))) |
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| 158 | |
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| 159 | /* For each class, get the narrowest mode in that class. */ |
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| 160 | |
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| 161 | extern enum machine_mode class_narrowest_mode[]; |
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| 162 | #define GET_CLASS_NARROWEST_MODE(CLASS) class_narrowest_mode[(int)(CLASS)] |
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| 163 | |
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| 164 | /* Define the integer modes whose sizes are BITS_PER_UNIT and BITS_PER_WORD |
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| 165 | and the mode whose class is Pmode and whose size is POINTER_SIZE. */ |
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| 166 | |
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| 167 | extern enum machine_mode byte_mode; |
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| 168 | extern enum machine_mode word_mode; |
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| 169 | extern enum machine_mode ptr_mode; |
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| 170 | |
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| 171 | #endif /* not HAVE_MACHINE_MODES */ |
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