1 /* Machine mode definitions for GCC; included by rtl.h and tree.h.
2 Copyright (C) 1991, 1993, 1994, 1996, 1998, 1999, 2000, 2001, 2003
3 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
22 #ifndef HAVE_MACHINE_MODES
23 #define HAVE_MACHINE_MODES
25 /* Make an enum class that gives all the machine modes. */
26 #include "insn-modes.h"
28 /* Given MODE as integer value, get the corresponding enum machine_mode
30 #define to_machine_mode(MODE) ((enum machine_mode) (MODE))
32 /* Get the name of mode MODE as a string. */
34 extern const char * const mode_name
[NUM_MACHINE_MODES
];
35 #define GET_MODE_NAME(MODE) mode_name[MODE]
39 #include "mode-classes.def"
40 #define DEF_MODE_CLASS(M) M
41 enum mode_class
{ MODE_CLASSES
, MAX_MODE_CLASS
};
45 /* Get the general kind of object that mode MODE represents
46 (integer, floating, complex, etc.) */
48 extern const unsigned char mode_class
[NUM_MACHINE_MODES
];
49 #define GET_MODE_CLASS(MODE) mode_class[MODE]
51 /* Nonzero if MODE is an integral mode. */
52 #define INTEGRAL_MODE_P(MODE) \
53 (GET_MODE_CLASS (MODE) == MODE_INT \
54 || GET_MODE_CLASS (MODE) == MODE_PARTIAL_INT \
55 || GET_MODE_CLASS (MODE) == MODE_COMPLEX_INT \
56 || GET_MODE_CLASS (MODE) == MODE_VECTOR_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 \
62 || GET_MODE_CLASS (MODE) == MODE_VECTOR_FLOAT)
64 /* Nonzero if MODE is a complex mode. */
65 #define COMPLEX_MODE_P(MODE) \
66 (GET_MODE_CLASS (MODE) == MODE_COMPLEX_INT \
67 || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT)
69 /* Nonzero if MODE is a vector mode. */
70 #define VECTOR_MODE_P(MODE) \
71 (GET_MODE_CLASS (MODE) == MODE_VECTOR_INT \
72 || GET_MODE_CLASS (MODE) == MODE_VECTOR_FLOAT)
74 /* Nonzero if MODE is a scalar integral mode. */
75 #define SCALAR_INT_MODE_P(MODE) \
76 (GET_MODE_CLASS (MODE) == MODE_INT \
77 || GET_MODE_CLASS (MODE) == MODE_PARTIAL_INT)
79 /* Nonzero if MODE is a scalar floating point mode. */
80 #define SCALAR_FLOAT_MODE_P(MODE) \
81 (GET_MODE_CLASS (MODE) == MODE_FLOAT)
83 /* Get the size in bytes and bits of an object of mode MODE. */
85 extern CONST_MODE_SIZE
unsigned char mode_size
[NUM_MACHINE_MODES
];
86 #define GET_MODE_SIZE(MODE) ((unsigned short) mode_size[MODE])
87 #define GET_MODE_BITSIZE(MODE) ((unsigned short) (GET_MODE_SIZE (MODE) * BITS_PER_UNIT))
89 /* Get the number of value bits of an object of mode MODE. */
90 extern const unsigned short mode_precision
[NUM_MACHINE_MODES
];
91 #define GET_MODE_PRECISION(MODE) mode_precision[MODE]
93 /* Get a bitmask containing 1 for all bits in a word
94 that fit within mode MODE. */
96 extern const unsigned HOST_WIDE_INT mode_mask_array
[NUM_MACHINE_MODES
];
98 #define GET_MODE_MASK(MODE) mode_mask_array[MODE]
100 /* Return the mode of the inner elements in a vector. */
102 extern const unsigned char mode_inner
[NUM_MACHINE_MODES
];
103 #define GET_MODE_INNER(MODE) mode_inner[MODE]
105 /* Get the size in bytes of the basic parts of an object of mode MODE. */
107 #define GET_MODE_UNIT_SIZE(MODE) \
108 (GET_MODE_INNER (MODE) == VOIDmode \
109 ? GET_MODE_SIZE (MODE) \
110 : GET_MODE_SIZE (GET_MODE_INNER (MODE)))
112 /* Get the number of units in the object. */
114 extern const unsigned char mode_nunits
[NUM_MACHINE_MODES
];
115 #define GET_MODE_NUNITS(MODE) mode_nunits[MODE]
117 /* Get the next wider natural mode (eg, QI -> HI -> SI -> DI -> TI). */
119 extern const unsigned char mode_wider
[NUM_MACHINE_MODES
];
120 #define GET_MODE_WIDER_MODE(MODE) mode_wider[MODE]
122 extern const unsigned char mode_2xwider
[NUM_MACHINE_MODES
];
123 #define GET_MODE_2XWIDER_MODE(MODE) mode_2xwider[MODE]
125 /* Return the mode for data of a given size SIZE and mode class CLASS.
126 If LIMIT is nonzero, then don't use modes bigger than MAX_FIXED_MODE_SIZE.
127 The value is BLKmode if no other mode is found. */
129 extern enum machine_mode
mode_for_size (unsigned int, enum mode_class
, int);
131 /* Similar, but find the smallest mode for a given width. */
133 extern enum machine_mode
smallest_mode_for_size (unsigned int,
137 /* Return an integer mode of the exact same size as the input mode,
138 or BLKmode on failure. */
140 extern enum machine_mode
int_mode_for_mode (enum machine_mode
);
142 /* Find the best mode to use to access a bit field. */
144 extern enum machine_mode
get_best_mode (int, int, unsigned int,
145 enum machine_mode
, int);
147 /* Determine alignment, 1<=result<=BIGGEST_ALIGNMENT. */
149 extern CONST_MODE_BASE_ALIGN
unsigned char mode_base_align
[NUM_MACHINE_MODES
];
151 extern unsigned get_mode_alignment (enum machine_mode
);
153 #define GET_MODE_ALIGNMENT(MODE) get_mode_alignment (MODE)
155 /* For each class, get the narrowest mode in that class. */
157 extern const unsigned char class_narrowest_mode
[MAX_MODE_CLASS
];
158 #define GET_CLASS_NARROWEST_MODE(CLASS) class_narrowest_mode[CLASS]
160 /* Define the integer modes whose sizes are BITS_PER_UNIT and BITS_PER_WORD
161 and the mode whose class is Pmode and whose size is POINTER_SIZE. */
163 extern enum machine_mode byte_mode
;
164 extern enum machine_mode word_mode
;
165 extern enum machine_mode ptr_mode
;
167 /* Target-dependent machine mode initialization - in insn-modes.c. */
168 extern void init_adjust_machine_modes (void);
170 #endif /* not HAVE_MACHINE_MODES */