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fc152a4b | 1 | /* Machine mode definitions for GNU C-Compiler; included by rtl.h and tree.h. |
72c602fc RK |
2 | Copyright (C) 1991, 1993, 1994, 1996, 1998, 1999, 2000 |
3 | Free Software Foundation, Inc. | |
fc152a4b RK |
4 | |
5 | This file is part of GNU CC. | |
6 | ||
7 | GNU CC is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GNU CC is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU CC; see the file COPYING. If not, write to | |
a35311b0 RK |
19 | the Free Software Foundation, 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
fc152a4b | 21 | |
fc152a4b | 22 | #ifndef HAVE_MACHINE_MODES |
70c75d9f DE |
23 | #define HAVE_MACHINE_MODES |
24 | ||
fc152a4b RK |
25 | /* Make an enum class that gives all the machine modes. */ |
26 | ||
27 | #define DEF_MACHMODE(SYM, NAME, TYPE, SIZE, UNIT, WIDER) SYM, | |
28 | ||
29 | enum machine_mode { | |
30 | #include "machmode.def" | |
fc152a4b RK |
31 | MAX_MACHINE_MODE }; |
32 | ||
33 | #undef DEF_MACHMODE | |
34 | ||
fc152a4b RK |
35 | #ifndef NUM_MACHINE_MODES |
36 | #define NUM_MACHINE_MODES (int) MAX_MACHINE_MODE | |
37 | #endif | |
38 | ||
39 | /* Get the name of mode MODE as a string. */ | |
40 | ||
a4ec8d12 | 41 | extern const char * const mode_name[]; |
0f41302f | 42 | #define GET_MODE_NAME(MODE) (mode_name[(int) (MODE)]) |
fc152a4b RK |
43 | |
44 | enum mode_class { MODE_RANDOM, MODE_INT, MODE_FLOAT, MODE_PARTIAL_INT, MODE_CC, | |
4a39a918 | 45 | MODE_COMPLEX_INT, MODE_COMPLEX_FLOAT, MAX_MODE_CLASS}; |
fc152a4b RK |
46 | |
47 | /* Get the general kind of object that mode MODE represents | |
48 | (integer, floating, complex, etc.) */ | |
49 | ||
aa0b4465 | 50 | extern const enum mode_class mode_class[]; |
0f41302f | 51 | #define GET_MODE_CLASS(MODE) (mode_class[(int) (MODE)]) |
fc152a4b | 52 | |
ae1ae48c RK |
53 | /* Nonzero if MODE is an integral mode. */ |
54 | #define INTEGRAL_MODE_P(MODE) \ | |
55 | (GET_MODE_CLASS (MODE) == MODE_INT \ | |
56 | || GET_MODE_CLASS (MODE) == MODE_PARTIAL_INT \ | |
57 | || GET_MODE_CLASS (MODE) == MODE_COMPLEX_INT) | |
58 | ||
59 | /* Nonzero if MODE is a floating-point mode. */ | |
60 | #define FLOAT_MODE_P(MODE) \ | |
61 | (GET_MODE_CLASS (MODE) == MODE_FLOAT \ | |
62 | || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT) | |
63 | ||
76080169 RH |
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) | |
68 | ||
fc152a4b RK |
69 | /* Get the size in bytes of an object of mode MODE. */ |
70 | ||
770ae6cc | 71 | extern const unsigned int mode_size[]; |
0f41302f | 72 | #define GET_MODE_SIZE(MODE) (mode_size[(int) (MODE)]) |
fc152a4b RK |
73 | |
74 | /* Get the size in bytes of the basic parts of an object of mode MODE. */ | |
75 | ||
770ae6cc | 76 | extern const unsigned int mode_unit_size[]; |
0f41302f | 77 | #define GET_MODE_UNIT_SIZE(MODE) (mode_unit_size[(int) (MODE)]) |
fc152a4b RK |
78 | |
79 | /* Get the number of units in the object. */ | |
80 | ||
81 | #define GET_MODE_NUNITS(MODE) \ | |
fa45b1eb RS |
82 | ((GET_MODE_UNIT_SIZE ((MODE)) == 0) ? 0 \ |
83 | : (GET_MODE_SIZE ((MODE)) / GET_MODE_UNIT_SIZE ((MODE)))) | |
fc152a4b RK |
84 | |
85 | /* Get the size in bits of an object of mode MODE. */ | |
86 | ||
0f41302f | 87 | #define GET_MODE_BITSIZE(MODE) (BITS_PER_UNIT * mode_size[(int) (MODE)]) |
fc152a4b | 88 | |
64ccbc99 KG |
89 | #ifdef HOST_WIDE_INT |
90 | ||
fc152a4b RK |
91 | /* Get a bitmask containing 1 for all bits in a word |
92 | that fit within mode MODE. */ | |
93 | ||
aa0b4465 | 94 | extern const unsigned HOST_WIDE_INT mode_mask_array[]; |
913f68c1 JC |
95 | |
96 | #define GET_MODE_MASK(MODE) mode_mask_array[(int) (MODE)] | |
fc152a4b | 97 | |
64ccbc99 KG |
98 | #endif /* HOST_WIDE_INT */ |
99 | ||
fc152a4b RK |
100 | /* Get the next wider natural mode (eg, QI -> HI -> SI -> DI -> TI). */ |
101 | ||
aa0b4465 | 102 | extern const unsigned char mode_wider_mode[]; |
913f68c1 | 103 | #define GET_MODE_WIDER_MODE(MODE) ((enum machine_mode)mode_wider_mode[(int) (MODE)]) |
fc152a4b | 104 | |
c92c981a RK |
105 | /* Return the mode for data of a given size SIZE and mode class CLASS. |
106 | If LIMIT is nonzero, then don't use modes bigger than MAX_FIXED_MODE_SIZE. | |
107 | The value is BLKmode if no other mode is found. */ | |
108 | ||
770ae6cc RK |
109 | extern enum machine_mode mode_for_size PARAMS ((unsigned int, |
110 | enum mode_class, int)); | |
c92c981a | 111 | |
27922c13 RH |
112 | /* Similar, but find the smallest mode for a given width. */ |
113 | ||
72c602fc | 114 | extern enum machine_mode smallest_mode_for_size |
770ae6cc | 115 | PARAMS ((unsigned int, enum mode_class)); |
27922c13 RH |
116 | |
117 | ||
d006aa54 RH |
118 | /* Return an integer mode of the exact same size as the input mode, |
119 | or BLKmode on failure. */ | |
120 | ||
13536812 | 121 | extern enum machine_mode int_mode_for_mode PARAMS ((enum machine_mode)); |
d006aa54 | 122 | |
fc152a4b RK |
123 | /* Find the best mode to use to access a bit field. */ |
124 | ||
729a2125 RK |
125 | extern enum machine_mode get_best_mode PARAMS ((int, int, unsigned int, |
126 | enum machine_mode, int)); | |
fc152a4b RK |
127 | |
128 | /* Determine alignment, 1<=result<=BIGGEST_ALIGNMENT. */ | |
129 | ||
36c265b1 NS |
130 | extern unsigned get_mode_alignment PARAMS ((enum machine_mode)); |
131 | ||
132 | #define GET_MODE_ALIGNMENT(MODE) get_mode_alignment (MODE) | |
fc152a4b | 133 | |
4a39a918 RK |
134 | /* For each class, get the narrowest mode in that class. */ |
135 | ||
aa0b4465 | 136 | extern const enum machine_mode class_narrowest_mode[]; |
0f41302f | 137 | #define GET_CLASS_NARROWEST_MODE(CLASS) class_narrowest_mode[(int) (CLASS)] |
4a39a918 | 138 | |
6c164c81 RK |
139 | /* Define the integer modes whose sizes are BITS_PER_UNIT and BITS_PER_WORD |
140 | and the mode whose class is Pmode and whose size is POINTER_SIZE. */ | |
4a39a918 RK |
141 | |
142 | extern enum machine_mode byte_mode; | |
143 | extern enum machine_mode word_mode; | |
6c164c81 | 144 | extern enum machine_mode ptr_mode; |
4a39a918 | 145 | |
fc152a4b | 146 | #endif /* not HAVE_MACHINE_MODES */ |