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95e304f7 | 1 | /* This file contains the definitions and documentation for the |
38e01259 | 2 | machine modes used in the GNU compiler. |
7a099817 | 3 | Copyright (C) 1987, 1992, 1994, 1997, 1998, 2000 Free Software Foundation, Inc. |
95e304f7 | 4 | |
1322177d | 5 | This file is part of GCC. |
95e304f7 | 6 | |
1322177d LB |
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 | |
10 | version. | |
95e304f7 | 11 | |
1322177d LB |
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 | |
15 | for more details. | |
95e304f7 CH |
16 | |
17 | You should have received a copy of the GNU General Public License | |
1322177d LB |
18 | along with GCC; see the file COPYING. If not, write to the Free |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
95e304f7 CH |
21 | |
22 | ||
1322177d | 23 | /* This file defines all the MACHINE MODES used by GCC. |
95e304f7 CH |
24 | |
25 | A machine mode specifies a size and format of data | |
26 | at the machine level. | |
27 | ||
28 | Each RTL expression has a machine mode. | |
29 | ||
30 | At the syntax tree level, each ..._TYPE and each ..._DECL node | |
31 | has a machine mode which describes data of that type or the | |
32 | data of the variable declared. */ | |
33 | ||
34 | /* The first argument is the internal name of the machine mode | |
35 | used in the C source. | |
36 | By convention these are in UPPER_CASE, except for the word "mode". | |
37 | ||
38 | The second argument is the name of the machine mode in the | |
39 | external ASCII format used for reading and printing RTL and trees. | |
40 | By convention these names in UPPER_CASE. | |
41 | ||
42 | Third argument states the kind of representation: | |
43 | MODE_INT - integer | |
44 | MODE_FLOAT - floating | |
e5e809f4 | 45 | MODE_PARTIAL_INT - PQImode, PHImode, PSImode and PDImode |
95e304f7 CH |
46 | MODE_CC - modes used for representing the condition code in a register |
47 | MODE_COMPLEX_INT, MODE_COMPLEX_FLOAT - complex number | |
f9f27ee5 | 48 | MODE_VECTOR_INT, MODE_VECTOR_FLOAT - vector |
95e304f7 CH |
49 | MODE_RANDOM - anything else |
50 | ||
a191f0ee RH |
51 | Fourth argument is the relative size of the object, in bits, |
52 | so we can have modes smaller than 1 byte. | |
53 | ||
54 | Fifth argument is the relative size of the object, in bytes. | |
95e304f7 CH |
55 | It is zero when the size is meaningless or not determined. |
56 | A byte's size is determined by BITS_PER_UNIT in tm.h. | |
57 | ||
a191f0ee | 58 | Sixth arg is the relative size of subunits of the object. |
11f3dc89 TP |
59 | It is same as the fifth argument except for complexes and vectors, |
60 | since they are really made of many equal size subunits. | |
95e304f7 | 61 | |
7ba2b35c AH |
62 | Seventh arg is next wider natural mode of the same class. 0 if |
63 | there is none. Vector modes use this field to point to the next | |
64 | vector size, so we can iterate through the different vectors modes. | |
65 | The ordering is by increasing byte size, with QI coming before HI, | |
69ef87e2 AH |
66 | HI before SI, etc. |
67 | ||
c6e6f5c1 RH |
68 | Eigth arg is the mode of the internal elements in a vector or |
69 | complex, and VOIDmode if not applicable. | |
69ef87e2 | 70 | */ |
95e304f7 CH |
71 | |
72 | /* VOIDmode is used when no mode needs to be specified, | |
73 | as for example on CONST_INT RTL expressions. */ | |
69ef87e2 | 74 | DEF_MACHMODE (VOIDmode, "VOID", MODE_RANDOM, 0, 0, 0, VOIDmode, VOIDmode) |
a191f0ee | 75 | |
69ef87e2 AH |
76 | DEF_MACHMODE (BImode, "BI", MODE_INT, 1, 1, 1, QImode, VOIDmode) |
77 | DEF_MACHMODE (QImode, "QI", MODE_INT, BITS_PER_UNIT, 1, 1, HImode, VOIDmode) | |
78 | DEF_MACHMODE (HImode, "HI", MODE_INT, BITS_PER_UNIT*2, 2, 2, SImode, VOIDmode) | |
79 | DEF_MACHMODE (SImode, "SI", MODE_INT, BITS_PER_UNIT*4, 4, 4, DImode, VOIDmode) | |
80 | DEF_MACHMODE (DImode, "DI", MODE_INT, BITS_PER_UNIT*8, 8, 8, TImode, VOIDmode) | |
81 | DEF_MACHMODE (TImode, "TI", MODE_INT, BITS_PER_UNIT*16, 16, 16, OImode, VOIDmode) | |
82 | DEF_MACHMODE (OImode, "OI", MODE_INT, BITS_PER_UNIT*32, 32, 32, VOIDmode, VOIDmode) | |
a191f0ee RH |
83 | |
84 | /* Pointers on some machines use these types to distinguish them from | |
85 | ints. Useful if a pointer is 4 bytes but has some bits that are | |
86 | not significant, so it is really not quite as wide as an integer. */ | |
69ef87e2 AH |
87 | DEF_MACHMODE (PQImode, "PQI", MODE_PARTIAL_INT, BITS_PER_UNIT, 1, 1, PHImode, VOIDmode) |
88 | DEF_MACHMODE (PHImode, "PHI", MODE_PARTIAL_INT, BITS_PER_UNIT*2, 2, 2, PSImode, VOIDmode) | |
89 | DEF_MACHMODE (PSImode, "PSI", MODE_PARTIAL_INT, BITS_PER_UNIT*4, 4, 4, PDImode, VOIDmode) | |
90 | DEF_MACHMODE (PDImode, "PDI", MODE_PARTIAL_INT, BITS_PER_UNIT*8, 8, 8, VOIDmode, VOIDmode) | |
91 | ||
92 | DEF_MACHMODE (QFmode, "QF", MODE_FLOAT, BITS_PER_UNIT, 1, 1, HFmode, VOIDmode) | |
93 | DEF_MACHMODE (HFmode, "HF", MODE_FLOAT, BITS_PER_UNIT*2, 2, 2, TQFmode, VOIDmode) | |
94 | DEF_MACHMODE (TQFmode, "TQF", MODE_FLOAT, BITS_PER_UNIT*3, 3, 3, SFmode, VOIDmode) /* MIL-STD-1750A */ | |
95 | DEF_MACHMODE (SFmode, "SF", MODE_FLOAT, BITS_PER_UNIT*4, 4, 4, DFmode, VOIDmode) | |
96 | DEF_MACHMODE (DFmode, "DF", MODE_FLOAT, BITS_PER_UNIT*8, 8, 8, XFmode, VOIDmode) | |
97 | DEF_MACHMODE (XFmode, "XF", MODE_FLOAT, BITS_PER_UNIT*12, 12, 12, TFmode, VOIDmode) /* IEEE extended */ | |
98 | DEF_MACHMODE (TFmode, "TF", MODE_FLOAT, BITS_PER_UNIT*16, 16, 16, VOIDmode, VOIDmode) | |
95e304f7 | 99 | |
c100b4ef | 100 | /* Complex modes. */ |
c6e6f5c1 RH |
101 | DEF_MACHMODE (QCmode, "QC", MODE_COMPLEX_FLOAT, BITS_PER_UNIT*2, 2, 1, HCmode, QFmode) |
102 | DEF_MACHMODE (HCmode, "HC", MODE_COMPLEX_FLOAT, BITS_PER_UNIT*4, 4, 2, SCmode, HFmode) | |
103 | DEF_MACHMODE (SCmode, "SC", MODE_COMPLEX_FLOAT, BITS_PER_UNIT*8, 8, 4, DCmode, SFmode) | |
104 | DEF_MACHMODE (DCmode, "DC", MODE_COMPLEX_FLOAT, BITS_PER_UNIT*16, 16, 8, XCmode, DFmode) | |
105 | DEF_MACHMODE (XCmode, "XC", MODE_COMPLEX_FLOAT, BITS_PER_UNIT*24, 24, 12, TCmode, XFmode) | |
106 | DEF_MACHMODE (TCmode, "TC", MODE_COMPLEX_FLOAT, BITS_PER_UNIT*32, 32, 16, VOIDmode, TFmode) | |
107 | ||
108 | DEF_MACHMODE (CQImode, "CQI", MODE_COMPLEX_INT, BITS_PER_UNIT*2, 2, 1, CHImode, QImode) | |
109 | DEF_MACHMODE (CHImode, "CHI", MODE_COMPLEX_INT, BITS_PER_UNIT*4, 4, 2, CSImode, HImode) | |
110 | DEF_MACHMODE (CSImode, "CSI", MODE_COMPLEX_INT, BITS_PER_UNIT*8, 8, 4, CDImode, SImode) | |
111 | DEF_MACHMODE (CDImode, "CDI", MODE_COMPLEX_INT, BITS_PER_UNIT*16, 16, 8, CTImode, DImode) | |
112 | DEF_MACHMODE (CTImode, "CTI", MODE_COMPLEX_INT, BITS_PER_UNIT*32, 32, 16, COImode, TImode) | |
113 | DEF_MACHMODE (COImode, "COI", MODE_COMPLEX_INT, BITS_PER_UNIT*64, 64, 32, VOIDmode, OImode) | |
c100b4ef | 114 | |
f9f27ee5 | 115 | /* Vector modes. */ |
9016e543 | 116 | /* The wider mode field for vectors follows in order of increasing bit |
7ba2b35c | 117 | size with QI coming before HI, HI before SI, and SI before DI |
9016e543 | 118 | within same bit sizes. */ |
256e9fd2 | 119 | DEF_MACHMODE (V1DImode, "V1DI", MODE_VECTOR_INT, BITS_PER_UNIT*8, 8, 8, V2QImode, DImode) |
69ef87e2 AH |
120 | DEF_MACHMODE (V2QImode, "V2QI", MODE_VECTOR_INT, BITS_PER_UNIT*2, 2, 1, V4QImode, QImode) |
121 | DEF_MACHMODE (V2HImode, "V2HI", MODE_VECTOR_INT, BITS_PER_UNIT*4, 4, 2, V8QImode, HImode) | |
122 | DEF_MACHMODE (V2SImode, "V2SI", MODE_VECTOR_INT, BITS_PER_UNIT*8, 8, 4, V16QImode, SImode) | |
123 | DEF_MACHMODE (V2DImode, "V2DI", MODE_VECTOR_INT, BITS_PER_UNIT*16, 16, 8, V8SImode, DImode) | |
9016e543 | 124 | |
69ef87e2 AH |
125 | DEF_MACHMODE (V4QImode, "V4QI", MODE_VECTOR_INT, BITS_PER_UNIT*4, 4, 1, V2HImode, QImode) |
126 | DEF_MACHMODE (V4HImode, "V4HI", MODE_VECTOR_INT, BITS_PER_UNIT*8, 8, 2, V2SImode, HImode) | |
127 | DEF_MACHMODE (V4SImode, "V4SI", MODE_VECTOR_INT, BITS_PER_UNIT*16, 16, 4, V2DImode, SImode) | |
128 | DEF_MACHMODE (V4DImode, "V4DI", MODE_VECTOR_INT, BITS_PER_UNIT*32, 32, 8, V8DImode, DImode) | |
9016e543 | 129 | |
69ef87e2 AH |
130 | DEF_MACHMODE (V8QImode, "V8QI", MODE_VECTOR_INT, BITS_PER_UNIT*8, 8, 1, V4HImode, QImode) |
131 | DEF_MACHMODE (V8HImode, "V8HI", MODE_VECTOR_INT, BITS_PER_UNIT*16, 16, 2, V4SImode, HImode) | |
132 | DEF_MACHMODE (V8SImode, "V8SI", MODE_VECTOR_INT, BITS_PER_UNIT*32, 32, 4, V4DImode, SImode) | |
133 | DEF_MACHMODE (V8DImode, "V8DI", MODE_VECTOR_INT, BITS_PER_UNIT*64, 64, 8, VOIDmode, DImode) | |
f9f27ee5 | 134 | |
69ef87e2 | 135 | DEF_MACHMODE (V16QImode, "V16QI", MODE_VECTOR_INT, BITS_PER_UNIT*16, 16, 1, V8HImode, QImode) |
7a099817 | 136 | |
4977bab6 | 137 | DEF_MACHMODE (V2HFmode, "V2HF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*4, 4, 2, V4HFmode, HFmode) |
69ef87e2 AH |
138 | DEF_MACHMODE (V2SFmode, "V2SF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*8, 8, 4, V4SFmode, SFmode) |
139 | DEF_MACHMODE (V2DFmode, "V2DF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*16, 16, 8, V8SFmode, DFmode) | |
f9f27ee5 | 140 | |
4977bab6 | 141 | DEF_MACHMODE (V4HFmode, "V4HF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*8, 8, 2, V2SFmode, HFmode) |
69ef87e2 AH |
142 | DEF_MACHMODE (V4SFmode, "V4SF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*16, 16, 4, V2DFmode, SFmode) |
143 | DEF_MACHMODE (V4DFmode, "V4DF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*32, 32, 8, V8DFmode, DFmode) | |
f9f27ee5 | 144 | |
4977bab6 ZW |
145 | DEF_MACHMODE (V8HFmode, "V8HF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*16, 16, 2, V4SFmode, HFmode) |
146 | DEF_MACHMODE (V8SFmode, "V8SF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*32, 32, 4, V4DFmode, SFmode) | |
69ef87e2 AH |
147 | DEF_MACHMODE (V8DFmode, "V8DF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*64, 64, 8, VOIDmode, DFmode) |
148 | DEF_MACHMODE (V16SFmode, "V16SF", MODE_VECTOR_FLOAT, 512, 64, 4, VOIDmode, SFmode) | |
f9f27ee5 | 149 | |
95e304f7 CH |
150 | /* BLKmode is used for structures, arrays, etc. |
151 | that fit no more specific mode. */ | |
69ef87e2 | 152 | DEF_MACHMODE (BLKmode, "BLK", MODE_RANDOM, 0, 0, 0, VOIDmode, VOIDmode) |
95e304f7 | 153 | |
a191f0ee RH |
154 | /* The modes for representing the condition codes come last. CCmode |
155 | is always defined. Additional modes for the condition code can be | |
a5381466 | 156 | specified in the EXTRA_CC_MODES header. All MODE_CC modes are the |
a191f0ee | 157 | same width as SImode and have VOIDmode as their next wider mode. */ |
aa0b4465 | 158 | |
a5381466 ZW |
159 | /* We do not use CC() for CCmode to avoid a warning about use of |
160 | function-like macros with no arguments. */ | |
161 | DEF_MACHMODE (CCmode, "CC", MODE_CC, BITS_PER_UNIT*4, 4, 4, VOIDmode, VOIDmode) | |
95e304f7 | 162 | |
a5381466 ZW |
163 | #ifdef EXTRA_MODES_FILE |
164 | #define CC(N) \ | |
165 | DEF_MACHMODE (CONCAT2 (N,mode), STRINGX (N), \ | |
166 | MODE_CC, BITS_PER_UNIT*4, 4, 4, VOIDmode, VOIDmode) | |
167 | #include EXTRA_MODES_FILE | |
aa0b4465 | 168 | #undef CC |
a5381466 | 169 | #endif |
95e304f7 CH |
170 | |
171 | /* The symbol Pmode stands for one of the above machine modes (usually SImode). | |
f0e1f482 | 172 | The tm file specifies which one. It is not a distinct mode. */ |
95e304f7 CH |
173 | |
174 | /* | |
175 | Local variables: | |
176 | mode:c | |
177 | version-control: t | |
178 | End: | |
179 | */ |