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1.1 root 1: /* Machine mode definitions for GNU C-Compiler; included by rtl.h and tree.h.
1.1.1.5 root 2: Copyright (C) 1991, 1993 Free Software Foundation, Inc.
1.1 root 3:
4: This file is part of GNU CC.
5:
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)
9: any later version.
10:
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.
15:
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, 675 Mass Ave, Cambridge, MA 02139, USA. */
19:
20:
1.1.1.4 root 21: /* Add prototype support. */
22: #ifndef PROTO
23: #if defined (USE_PROTOTYPES) ? USE_PROTOTYPES : defined (__STDC__)
24: #define PROTO(ARGS) ARGS
25: #else
26: #define PROTO(ARGS) ()
27: #endif
28: #endif
29:
1.1 root 30: #ifndef HAVE_MACHINE_MODES
31:
32: /* Strictly speaking, this isn't the proper place to include these definitions,
33: but this file is included by every GCC file.
34:
35: Some systems define these in, e.g., param.h. We undefine these names
36: here to avoid the warnings. We prefer to use our definitions since we
37: know they are correct. */
38:
39: #undef MIN
40: #undef MAX
41:
42: #define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
43: #define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
44:
1.1.1.3 root 45: /* Find the largest host integer type and set its size and type. */
46:
47: #ifndef HOST_BITS_PER_WIDE_INT
48:
49: #if HOST_BITS_PER_LONG > HOST_BITS_PER_INT
50: #define HOST_BITS_PER_WIDE_INT HOST_BITS_PER_LONG
51: #define HOST_WIDE_INT long
52: #else
53: #define HOST_BITS_PER_WIDE_INT HOST_BITS_PER_INT
54: #define HOST_WIDE_INT int
55: #endif
56:
57: #endif
58:
59: /* Provide a default way to print an address in hex via printf. */
60:
61: #ifndef HOST_PTR_PRINTF
62: #define HOST_PTR_PRINTF sizeof (int) == sizeof (char *) ? "%x" : "%lx"
63: #endif
64:
1.1 root 65: /* Make an enum class that gives all the machine modes. */
66:
67: #define DEF_MACHMODE(SYM, NAME, TYPE, SIZE, UNIT, WIDER) SYM,
68:
69: enum machine_mode {
70: #include "machmode.def"
71:
72: #ifdef EXTRA_CC_MODES
73: EXTRA_CC_MODES,
74: #endif
75: MAX_MACHINE_MODE };
76:
77: #undef DEF_MACHMODE
78:
79: #define HAVE_MACHINE_MODES
80:
81: #ifndef NUM_MACHINE_MODES
82: #define NUM_MACHINE_MODES (int) MAX_MACHINE_MODE
83: #endif
84:
85: /* Get the name of mode MODE as a string. */
86:
87: extern char *mode_name[];
88: #define GET_MODE_NAME(MODE) (mode_name[(int)(MODE)])
89:
90: enum mode_class { MODE_RANDOM, MODE_INT, MODE_FLOAT, MODE_PARTIAL_INT, MODE_CC,
91: MODE_COMPLEX_INT, MODE_COMPLEX_FLOAT, MAX_MODE_CLASS};
92:
93: /* Get the general kind of object that mode MODE represents
94: (integer, floating, complex, etc.) */
95:
96: extern enum mode_class mode_class[];
97: #define GET_MODE_CLASS(MODE) (mode_class[(int)(MODE)])
98:
1.1.1.5 root 99: /* Nonzero if MODE is an integral mode. */
100: #define INTEGRAL_MODE_P(MODE) \
101: (GET_MODE_CLASS (MODE) == MODE_INT \
102: || GET_MODE_CLASS (MODE) == MODE_PARTIAL_INT \
103: || GET_MODE_CLASS (MODE) == MODE_COMPLEX_INT)
104:
105: /* Nonzero if MODE is a floating-point mode. */
106: #define FLOAT_MODE_P(MODE) \
107: (GET_MODE_CLASS (MODE) == MODE_FLOAT \
108: || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT)
109:
1.1 root 110: /* Get the size in bytes of an object of mode MODE. */
111:
112: extern int mode_size[];
113: #define GET_MODE_SIZE(MODE) (mode_size[(int)(MODE)])
114:
115: /* Get the size in bytes of the basic parts of an object of mode MODE. */
116:
117: extern int mode_unit_size[];
118: #define GET_MODE_UNIT_SIZE(MODE) (mode_unit_size[(int)(MODE)])
119:
120: /* Get the number of units in the object. */
121:
122: #define GET_MODE_NUNITS(MODE) \
1.1.1.3 root 123: ((GET_MODE_UNIT_SIZE ((MODE)) == 0) ? 0 \
124: : (GET_MODE_SIZE ((MODE)) / GET_MODE_UNIT_SIZE ((MODE))))
1.1 root 125:
126: /* Get the size in bits of an object of mode MODE. */
127:
128: #define GET_MODE_BITSIZE(MODE) (BITS_PER_UNIT * mode_size[(int)(MODE)])
129:
130: /* Get a bitmask containing 1 for all bits in a word
131: that fit within mode MODE. */
132:
133: #define GET_MODE_MASK(MODE) \
1.1.1.3 root 134: ((GET_MODE_BITSIZE (MODE) >= HOST_BITS_PER_WIDE_INT) \
135: ?(HOST_WIDE_INT) ~0 : (((HOST_WIDE_INT) 1 << GET_MODE_BITSIZE (MODE)) - 1))
1.1 root 136:
137: /* Get the next wider natural mode (eg, QI -> HI -> SI -> DI -> TI). */
138:
139: extern enum machine_mode mode_wider_mode[];
140: #define GET_MODE_WIDER_MODE(MODE) (mode_wider_mode[(int)(MODE)])
141:
1.1.1.2 root 142: /* Return the mode for data of a given size SIZE and mode class CLASS.
143: If LIMIT is nonzero, then don't use modes bigger than MAX_FIXED_MODE_SIZE.
144: The value is BLKmode if no other mode is found. */
145:
1.1.1.4 root 146: extern enum machine_mode mode_for_size PROTO((unsigned int, enum mode_class, int));
1.1.1.2 root 147:
1.1 root 148: /* Find the best mode to use to access a bit field. */
149:
1.1.1.4 root 150: extern enum machine_mode get_best_mode PROTO((int, int, int, enum machine_mode, int));
1.1 root 151:
152: /* Determine alignment, 1<=result<=BIGGEST_ALIGNMENT. */
153:
154: #define GET_MODE_ALIGNMENT(MODE) \
155: MIN (BIGGEST_ALIGNMENT, \
156: MAX (1, (GET_MODE_UNIT_SIZE (MODE) * BITS_PER_UNIT)))
157:
158: /* For each class, get the narrowest mode in that class. */
159:
160: extern enum machine_mode class_narrowest_mode[];
161: #define GET_CLASS_NARROWEST_MODE(CLASS) class_narrowest_mode[(int)(CLASS)]
162:
163: /* Define the integer modes whose sizes are BITS_PER_UNIT
164: and BITS_PER_WORD. */
165:
166: extern enum machine_mode byte_mode;
167: extern enum machine_mode word_mode;
168:
169: #endif /* not HAVE_MACHINE_MODES */
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