1 /* Machine mode definitions for GNU C-Compiler; included by rtl.h and tree.h.
2 Copyright (C) 1991, 1993, 1994, 1996, 1998 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 #ifndef HAVE_MACHINE_MODES
22 #define HAVE_MACHINE_MODES
24 /* Strictly speaking, this isn't the proper place to include these definitions,
25 but this file is included by every GCC file. */
27 /* Provide a default way to print an address in hex via printf. */
29 #ifndef HOST_PTR_PRINTF
30 # ifdef HAVE_PRINTF_PTR
31 # define HOST_PTR_PRINTF "%p"
33 # define HOST_PTR_PRINTF \
34 (sizeof (int) == sizeof (char *) ? "%x" \
35 : sizeof (long) == sizeof (char *) ? "%lx" : "%llx")
37 #endif /* ! HOST_PTR_PRINTF */
39 /* Make an enum class that gives all the machine modes. */
41 #define DEF_MACHMODE(SYM, NAME, TYPE, SIZE, UNIT, WIDER) SYM,
44 #include "machmode.def"
53 #ifndef NUM_MACHINE_MODES
54 #define NUM_MACHINE_MODES (int) MAX_MACHINE_MODE
57 /* Get the name of mode MODE as a string. */
59 extern const char * const mode_name
[];
60 #define GET_MODE_NAME(MODE) (mode_name[(int) (MODE)])
62 enum mode_class
{ MODE_RANDOM
, MODE_INT
, MODE_FLOAT
, MODE_PARTIAL_INT
, MODE_CC
,
63 MODE_COMPLEX_INT
, MODE_COMPLEX_FLOAT
, MAX_MODE_CLASS
};
65 /* Get the general kind of object that mode MODE represents
66 (integer, floating, complex, etc.) */
68 extern enum mode_class mode_class
[];
69 #define GET_MODE_CLASS(MODE) (mode_class[(int) (MODE)])
71 /* Nonzero if MODE is an integral mode. */
72 #define INTEGRAL_MODE_P(MODE) \
73 (GET_MODE_CLASS (MODE) == MODE_INT \
74 || GET_MODE_CLASS (MODE) == MODE_PARTIAL_INT \
75 || GET_MODE_CLASS (MODE) == MODE_COMPLEX_INT)
77 /* Nonzero if MODE is a floating-point mode. */
78 #define FLOAT_MODE_P(MODE) \
79 (GET_MODE_CLASS (MODE) == MODE_FLOAT \
80 || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT)
82 /* Nonzero if MODE is a complex mode. */
83 #define COMPLEX_MODE_P(MODE) \
84 (GET_MODE_CLASS (MODE) == MODE_COMPLEX_INT \
85 || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT)
87 /* Get the size in bytes of an object of mode MODE. */
89 extern int mode_size
[];
90 #define GET_MODE_SIZE(MODE) (mode_size[(int) (MODE)])
92 /* Get the size in bytes of the basic parts of an object of mode MODE. */
94 extern int mode_unit_size
[];
95 #define GET_MODE_UNIT_SIZE(MODE) (mode_unit_size[(int) (MODE)])
97 /* Get the number of units in the object. */
99 #define GET_MODE_NUNITS(MODE) \
100 ((GET_MODE_UNIT_SIZE ((MODE)) == 0) ? 0 \
101 : (GET_MODE_SIZE ((MODE)) / GET_MODE_UNIT_SIZE ((MODE))))
103 /* Get the size in bits of an object of mode MODE. */
105 #define GET_MODE_BITSIZE(MODE) (BITS_PER_UNIT * mode_size[(int) (MODE)])
109 /* Get a bitmask containing 1 for all bits in a word
110 that fit within mode MODE. */
112 extern unsigned HOST_WIDE_INT mode_mask_array
[];
114 #define GET_MODE_MASK(MODE) mode_mask_array[(int) (MODE)]
116 #endif /* HOST_WIDE_INT */
118 /* Get the next wider natural mode (eg, QI -> HI -> SI -> DI -> TI). */
120 extern unsigned char mode_wider_mode
[];
121 #define GET_MODE_WIDER_MODE(MODE) ((enum machine_mode)mode_wider_mode[(int) (MODE)])
123 /* Return the mode for data of a given size SIZE and mode class CLASS.
124 If LIMIT is nonzero, then don't use modes bigger than MAX_FIXED_MODE_SIZE.
125 The value is BLKmode if no other mode is found. */
127 extern enum machine_mode mode_for_size
PROTO((unsigned int, enum mode_class
, int));
129 /* Similar, but find the smallest mode for a given width. */
131 extern enum machine_mode smallest_mode_for_size
PROTO((unsigned int,
135 /* Return an integer mode of the exact same size as the input mode,
136 or BLKmode on failure. */
138 extern enum machine_mode int_mode_for_mode
PROTO((enum machine_mode
));
140 /* Find the best mode to use to access a bit field. */
142 extern enum machine_mode get_best_mode
PROTO((int, int, int, enum machine_mode
, int));
144 /* Determine alignment, 1<=result<=BIGGEST_ALIGNMENT. */
146 #define GET_MODE_ALIGNMENT(MODE) \
147 MIN (BIGGEST_ALIGNMENT, \
148 MAX (1, (GET_MODE_UNIT_SIZE (MODE) * BITS_PER_UNIT)))
150 /* For each class, get the narrowest mode in that class. */
152 extern enum machine_mode class_narrowest_mode
[];
153 #define GET_CLASS_NARROWEST_MODE(CLASS) class_narrowest_mode[(int) (CLASS)]
155 /* Define the integer modes whose sizes are BITS_PER_UNIT and BITS_PER_WORD
156 and the mode whose class is Pmode and whose size is POINTER_SIZE. */
158 extern enum machine_mode byte_mode
;
159 extern enum machine_mode word_mode
;
160 extern enum machine_mode ptr_mode
;
162 #endif /* not HAVE_MACHINE_MODES */