1 | /* This file contains the definitions and documentation for the |
---|
2 | machine modes used in the the GNU compiler. |
---|
3 | Copyright (C) 1987, 1992, 1994 Free Software Foundation, Inc. |
---|
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 |
---|
19 | the Free Software Foundation, 59 Temple Place - Suite 330, |
---|
20 | Boston, MA 02111-1307, USA. */ |
---|
21 | |
---|
22 | |
---|
23 | /* This file defines all the MACHINE MODES used by GNU CC. |
---|
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 |
---|
45 | MODE_PARTIAL_INT - PSImode and PDImode |
---|
46 | MODE_CC - modes used for representing the condition code in a register |
---|
47 | MODE_COMPLEX_INT, MODE_COMPLEX_FLOAT - complex number |
---|
48 | MODE_RANDOM - anything else |
---|
49 | |
---|
50 | Fourth argument is the relative size of the object, in bytes. |
---|
51 | It is zero when the size is meaningless or not determined. |
---|
52 | A byte's size is determined by BITS_PER_UNIT in tm.h. |
---|
53 | |
---|
54 | |
---|
55 | Fifth arg is the relative size of subunits of the object. |
---|
56 | It is same as the fourth argument except for complexes, |
---|
57 | since they are really made of two equal size subunits. |
---|
58 | |
---|
59 | Sixth arg is next wider natural mode of the same class. |
---|
60 | 0 if there is none. */ |
---|
61 | |
---|
62 | /* VOIDmode is used when no mode needs to be specified, |
---|
63 | as for example on CONST_INT RTL expressions. */ |
---|
64 | DEF_MACHMODE (VOIDmode, "VOID", MODE_RANDOM, 0, 0, VOIDmode) |
---|
65 | |
---|
66 | DEF_MACHMODE (QImode, "QI", MODE_INT, 1, 1, HImode) /* int types */ |
---|
67 | DEF_MACHMODE (HImode, "HI", MODE_INT, 2, 2, SImode) |
---|
68 | /* Pointers on some machines use this type to distinguish them from ints. |
---|
69 | Useful if a pointer is 4 bytes but has some bits that are not significant, |
---|
70 | so it is really not quite as wide as an integer. */ |
---|
71 | DEF_MACHMODE (PSImode, "PSI", MODE_PARTIAL_INT, 4, 4, PDImode) |
---|
72 | DEF_MACHMODE (SImode, "SI", MODE_INT, 4, 4, DImode) |
---|
73 | DEF_MACHMODE (PDImode, "PDI", MODE_PARTIAL_INT, 8, 8, VOIDmode) |
---|
74 | DEF_MACHMODE (DImode, "DI", MODE_INT, 8, 8, TImode) |
---|
75 | DEF_MACHMODE (TImode, "TI", MODE_INT, 16, 16, OImode) |
---|
76 | DEF_MACHMODE (OImode, "OI", MODE_INT, 32, 32, VOIDmode) |
---|
77 | |
---|
78 | DEF_MACHMODE (QFmode, "QF", MODE_FLOAT, 1, 1, HFmode) |
---|
79 | DEF_MACHMODE (HFmode, "HF", MODE_FLOAT, 2, 2, TQFmode) |
---|
80 | DEF_MACHMODE (TQFmode, "TQF", MODE_FLOAT, 3, 3, SFmode) /* MIL-STD-1750A */ |
---|
81 | DEF_MACHMODE (SFmode, "SF", MODE_FLOAT, 4, 4, DFmode) |
---|
82 | DEF_MACHMODE (DFmode, "DF", MODE_FLOAT, 8, 8, XFmode) |
---|
83 | DEF_MACHMODE (XFmode, "XF", MODE_FLOAT, 12, 12, TFmode) /* IEEE extended */ |
---|
84 | DEF_MACHMODE (TFmode, "TF", MODE_FLOAT, 16, 16, VOIDmode) |
---|
85 | |
---|
86 | /* Complex modes. */ |
---|
87 | DEF_MACHMODE (SCmode, "SC", MODE_COMPLEX_FLOAT, 8, 4, DCmode) |
---|
88 | DEF_MACHMODE (DCmode, "DC", MODE_COMPLEX_FLOAT, 16, 8, XCmode) |
---|
89 | DEF_MACHMODE (XCmode, "XC", MODE_COMPLEX_FLOAT, 24, 12, TCmode) |
---|
90 | DEF_MACHMODE (TCmode, "TC", MODE_COMPLEX_FLOAT, 32, 16, VOIDmode) |
---|
91 | |
---|
92 | DEF_MACHMODE (CQImode, "CQI", MODE_COMPLEX_INT, 2, 1, CHImode) |
---|
93 | DEF_MACHMODE (CHImode, "CHI", MODE_COMPLEX_INT, 4, 2, CSImode) |
---|
94 | DEF_MACHMODE (CSImode, "CSI", MODE_COMPLEX_INT, 8, 4, CDImode) |
---|
95 | DEF_MACHMODE (CDImode, "CDI", MODE_COMPLEX_INT, 16, 8, CTImode) |
---|
96 | DEF_MACHMODE (CTImode, "CTI", MODE_COMPLEX_INT, 32, 16, COImode) |
---|
97 | DEF_MACHMODE (COImode, "COI", MODE_COMPLEX_INT, 64, 32, VOIDmode) |
---|
98 | |
---|
99 | /* BLKmode is used for structures, arrays, etc. |
---|
100 | that fit no more specific mode. */ |
---|
101 | DEF_MACHMODE (BLKmode, "BLK", MODE_RANDOM, 0, 0, VOIDmode) |
---|
102 | |
---|
103 | /* The modes for representing the condition codes come last. CCmode is |
---|
104 | always defined. Additional modes for the condition code can be specified |
---|
105 | in the EXTRA_CC_MODES macro. Everything but the names of the modes |
---|
106 | are copied from CCmode. For these modes, GET_MODE_WIDER_MODE points |
---|
107 | to the next defined CC mode, if any. */ |
---|
108 | |
---|
109 | DEF_MACHMODE (CCmode, "CC", MODE_CC, 4, 4, VOIDmode) |
---|
110 | |
---|
111 | /* The symbol Pmode stands for one of the above machine modes (usually SImode). |
---|
112 | The tm file specifies which one. It is not a distinct mode. */ |
---|
113 | |
---|
114 | /* |
---|
115 | Local variables: |
---|
116 | mode:c |
---|
117 | version-control: t |
---|
118 | End: |
---|
119 | */ |
---|