1 /* Machine mode definitions for GNU C-Compiler; included by rtl.h and tree.h.
2 Copyright (C) 1991, 93, 94, 96, 98, 99, 2000 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 /* Make an enum class that gives all the machine modes. */
26 #define DEF_MACHMODE(SYM, NAME, TYPE, SIZE, UNIT, WIDER) SYM,
29 #include "machmode.def"
34 #ifndef NUM_MACHINE_MODES
35 #define NUM_MACHINE_MODES (int) MAX_MACHINE_MODE
38 /* Get the name of mode MODE as a string. */
40 extern const char * const mode_name
[];
41 #define GET_MODE_NAME(MODE) (mode_name[(int) (MODE)])
43 enum mode_class
{ MODE_RANDOM
, MODE_INT
, MODE_FLOAT
, MODE_PARTIAL_INT
, MODE_CC
,
44 MODE_COMPLEX_INT
, MODE_COMPLEX_FLOAT
, MAX_MODE_CLASS
};
46 /* Get the general kind of object that mode MODE represents
47 (integer, floating, complex, etc.) */
49 extern const enum mode_class mode_class
[];
50 #define GET_MODE_CLASS(MODE) (mode_class[(int) (MODE)])
52 /* Nonzero if MODE is an integral mode. */
53 #define INTEGRAL_MODE_P(MODE) \
54 (GET_MODE_CLASS (MODE) == MODE_INT \
55 || GET_MODE_CLASS (MODE) == MODE_PARTIAL_INT \
56 || GET_MODE_CLASS (MODE) == MODE_COMPLEX_INT)
58 /* Nonzero if MODE is a floating-point mode. */
59 #define FLOAT_MODE_P(MODE) \
60 (GET_MODE_CLASS (MODE) == MODE_FLOAT \
61 || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT)
63 /* Nonzero if MODE is a complex mode. */
64 #define COMPLEX_MODE_P(MODE) \
65 (GET_MODE_CLASS (MODE) == MODE_COMPLEX_INT \
66 || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT)
68 /* Get the size in bytes of an object of mode MODE. */
70 extern const int mode_size
[];
71 #define GET_MODE_SIZE(MODE) (mode_size[(int) (MODE)])
73 /* Get the size in bytes of the basic parts of an object of mode MODE. */
75 extern const int mode_unit_size
[];
76 #define GET_MODE_UNIT_SIZE(MODE) (mode_unit_size[(int) (MODE)])
78 /* Get the number of units in the object. */
80 #define GET_MODE_NUNITS(MODE) \
81 ((GET_MODE_UNIT_SIZE ((MODE)) == 0) ? 0 \
82 : (GET_MODE_SIZE ((MODE)) / GET_MODE_UNIT_SIZE ((MODE))))
84 /* Get the size in bits of an object of mode MODE. */
86 #define GET_MODE_BITSIZE(MODE) (BITS_PER_UNIT * mode_size[(int) (MODE)])
90 /* Get a bitmask containing 1 for all bits in a word
91 that fit within mode MODE. */
93 extern const unsigned HOST_WIDE_INT mode_mask_array
[];
95 #define GET_MODE_MASK(MODE) mode_mask_array[(int) (MODE)]
97 #endif /* HOST_WIDE_INT */
99 /* Get the next wider natural mode (eg, QI -> HI -> SI -> DI -> TI). */
101 extern const unsigned char mode_wider_mode
[];
102 #define GET_MODE_WIDER_MODE(MODE) ((enum machine_mode)mode_wider_mode[(int) (MODE)])
104 /* Return the mode for data of a given size SIZE and mode class CLASS.
105 If LIMIT is nonzero, then don't use modes bigger than MAX_FIXED_MODE_SIZE.
106 The value is BLKmode if no other mode is found. */
108 extern enum machine_mode mode_for_size
PARAMS ((unsigned int, enum mode_class
, int));
110 /* Similar, but find the smallest mode for a given width. */
112 extern enum machine_mode smallest_mode_for_size
PARAMS ((unsigned int,
116 /* Return an integer mode of the exact same size as the input mode,
117 or BLKmode on failure. */
119 extern enum machine_mode int_mode_for_mode
PARAMS ((enum machine_mode
));
121 /* Find the best mode to use to access a bit field. */
123 extern enum machine_mode get_best_mode
PARAMS ((int, int, unsigned int,
124 enum machine_mode
, int));
126 /* Determine alignment, 1<=result<=BIGGEST_ALIGNMENT. */
128 extern unsigned get_mode_alignment
PARAMS ((enum machine_mode
));
130 #define GET_MODE_ALIGNMENT(MODE) get_mode_alignment (MODE)
132 /* For each class, get the narrowest mode in that class. */
134 extern const enum machine_mode class_narrowest_mode
[];
135 #define GET_CLASS_NARROWEST_MODE(CLASS) class_narrowest_mode[(int) (CLASS)]
137 /* Define the integer modes whose sizes are BITS_PER_UNIT and BITS_PER_WORD
138 and the mode whose class is Pmode and whose size is POINTER_SIZE. */
140 extern enum machine_mode byte_mode
;
141 extern enum machine_mode word_mode
;
142 extern enum machine_mode ptr_mode
;
144 #endif /* not HAVE_MACHINE_MODES */