source: trunk/third/gcc/machmode.h @ 8834

Revision 8834, 5.2 KB checked in by ghudson, 28 years ago (diff)
This commit was generated by cvs2svn to compensate for changes in r8833, which included commits to RCS files with non-trunk default branches.
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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 */
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