machmode.h revision 18334
1/* Machine mode definitions for GNU C-Compiler; included by rtl.h and tree.h. 2 Copyright (C) 1991, 1993, 1994 Free Software Foundation, Inc. 3 4This file is part of GNU CC. 5 6GNU CC is free software; you can redistribute it and/or modify 7it under the terms of the GNU General Public License as published by 8the Free Software Foundation; either version 2, or (at your option) 9any later version. 10 11GNU CC is distributed in the hope that it will be useful, 12but WITHOUT ANY WARRANTY; without even the implied warranty of 13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14GNU General Public License for more details. 15 16You should have received a copy of the GNU General Public License 17along with GNU CC; see the file COPYING. If not, write to 18the Free Software Foundation, 59 Temple Place - Suite 330, 19Boston, MA 02111-1307, USA. */ 20 21 22/* Add prototype support. */ 23#ifndef PROTO 24#if defined (USE_PROTOTYPES) ? USE_PROTOTYPES : defined (__STDC__) 25#define PROTO(ARGS) ARGS 26#else 27#define PROTO(ARGS) () 28#endif 29#endif 30 31#ifndef HAVE_MACHINE_MODES 32 33/* Strictly speaking, this isn't the proper place to include these definitions, 34 but this file is included by every GCC file. 35 36 Some systems define these in, e.g., param.h. We undefine these names 37 here to avoid the warnings. We prefer to use our definitions since we 38 know they are correct. */ 39 40#undef MIN 41#undef MAX 42 43#define MIN(X,Y) ((X) < (Y) ? (X) : (Y)) 44#define MAX(X,Y) ((X) > (Y) ? (X) : (Y)) 45 46/* Find the largest host integer type and set its size and type. */ 47 48#ifndef HOST_BITS_PER_WIDE_INT 49 50#if HOST_BITS_PER_LONG > HOST_BITS_PER_INT 51#define HOST_BITS_PER_WIDE_INT HOST_BITS_PER_LONG 52#define HOST_WIDE_INT long 53#else 54#define HOST_BITS_PER_WIDE_INT HOST_BITS_PER_INT 55#define HOST_WIDE_INT int 56#endif 57 58#endif 59 60/* Provide a default way to print an address in hex via printf. */ 61 62#ifndef HOST_PTR_PRINTF 63#define HOST_PTR_PRINTF sizeof (int) == sizeof (char *) ? "%x" : "%lx" 64#endif 65 66/* Make an enum class that gives all the machine modes. */ 67 68#define DEF_MACHMODE(SYM, NAME, TYPE, SIZE, UNIT, WIDER) SYM, 69 70enum machine_mode { 71#include "machmode.def" 72 73#ifdef EXTRA_CC_MODES 74 EXTRA_CC_MODES, 75#endif 76MAX_MACHINE_MODE }; 77 78#undef DEF_MACHMODE 79 80#define HAVE_MACHINE_MODES 81 82#ifndef NUM_MACHINE_MODES 83#define NUM_MACHINE_MODES (int) MAX_MACHINE_MODE 84#endif 85 86/* Get the name of mode MODE as a string. */ 87 88extern char *mode_name[]; 89#define GET_MODE_NAME(MODE) (mode_name[(int)(MODE)]) 90 91enum mode_class { MODE_RANDOM, MODE_INT, MODE_FLOAT, MODE_PARTIAL_INT, MODE_CC, 92 MODE_COMPLEX_INT, MODE_COMPLEX_FLOAT, MAX_MODE_CLASS}; 93 94/* Get the general kind of object that mode MODE represents 95 (integer, floating, complex, etc.) */ 96 97extern enum mode_class mode_class[]; 98#define GET_MODE_CLASS(MODE) (mode_class[(int)(MODE)]) 99 100/* Nonzero if MODE is an integral mode. */ 101#define INTEGRAL_MODE_P(MODE) \ 102 (GET_MODE_CLASS (MODE) == MODE_INT \ 103 || GET_MODE_CLASS (MODE) == MODE_PARTIAL_INT \ 104 || GET_MODE_CLASS (MODE) == MODE_COMPLEX_INT) 105 106/* Nonzero if MODE is a floating-point mode. */ 107#define FLOAT_MODE_P(MODE) \ 108 (GET_MODE_CLASS (MODE) == MODE_FLOAT \ 109 || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT) 110 111/* Get the size in bytes of an object of mode MODE. */ 112 113extern int mode_size[]; 114#define GET_MODE_SIZE(MODE) (mode_size[(int)(MODE)]) 115 116/* Get the size in bytes of the basic parts of an object of mode MODE. */ 117 118extern int mode_unit_size[]; 119#define GET_MODE_UNIT_SIZE(MODE) (mode_unit_size[(int)(MODE)]) 120 121/* Get the number of units in the object. */ 122 123#define GET_MODE_NUNITS(MODE) \ 124 ((GET_MODE_UNIT_SIZE ((MODE)) == 0) ? 0 \ 125 : (GET_MODE_SIZE ((MODE)) / GET_MODE_UNIT_SIZE ((MODE)))) 126 127/* Get the size in bits of an object of mode MODE. */ 128 129#define GET_MODE_BITSIZE(MODE) (BITS_PER_UNIT * mode_size[(int)(MODE)]) 130 131/* Get a bitmask containing 1 for all bits in a word 132 that fit within mode MODE. */ 133 134#define GET_MODE_MASK(MODE) \ 135 ((GET_MODE_BITSIZE (MODE) >= HOST_BITS_PER_WIDE_INT) \ 136 ?(HOST_WIDE_INT) ~0 : (((HOST_WIDE_INT) 1 << GET_MODE_BITSIZE (MODE)) - 1)) 137 138/* Get the next wider natural mode (eg, QI -> HI -> SI -> DI -> TI). */ 139 140extern enum machine_mode mode_wider_mode[]; 141#define GET_MODE_WIDER_MODE(MODE) (mode_wider_mode[(int)(MODE)]) 142 143/* Return the mode for data of a given size SIZE and mode class CLASS. 144 If LIMIT is nonzero, then don't use modes bigger than MAX_FIXED_MODE_SIZE. 145 The value is BLKmode if no other mode is found. */ 146 147extern enum machine_mode mode_for_size PROTO((unsigned int, enum mode_class, int)); 148 149/* Find the best mode to use to access a bit field. */ 150 151extern enum machine_mode get_best_mode PROTO((int, int, int, enum machine_mode, int)); 152 153/* Determine alignment, 1<=result<=BIGGEST_ALIGNMENT. */ 154 155#define GET_MODE_ALIGNMENT(MODE) \ 156 MIN (BIGGEST_ALIGNMENT, \ 157 MAX (1, (GET_MODE_UNIT_SIZE (MODE) * BITS_PER_UNIT))) 158 159/* For each class, get the narrowest mode in that class. */ 160 161extern enum machine_mode class_narrowest_mode[]; 162#define GET_CLASS_NARROWEST_MODE(CLASS) class_narrowest_mode[(int)(CLASS)] 163 164/* Define the integer modes whose sizes are BITS_PER_UNIT and BITS_PER_WORD 165 and the mode whose class is Pmode and whose size is POINTER_SIZE. */ 166 167extern enum machine_mode byte_mode; 168extern enum machine_mode word_mode; 169extern enum machine_mode ptr_mode; 170 171#endif /* not HAVE_MACHINE_MODES */ 172