1/* This file contains the definitions and documentation for the 2 machine modes used in the GNU compiler. 3 Copyright (C) 1987, 1992, 1994, 1997, 1998 Free Software Foundation, Inc. 4 5This file is part of GNU CC. 6 7GNU CC is free software; you can redistribute it and/or modify 8it under the terms of the GNU General Public License as published by 9the Free Software Foundation; either version 2, or (at your option) 10any later version. 11 12GNU CC is distributed in the hope that it will be useful, 13but WITHOUT ANY WARRANTY; without even the implied warranty of 14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15GNU General Public License for more details. 16 17You should have received a copy of the GNU General Public License 18along with GNU CC; see the file COPYING. If not, write to 19the Free Software Foundation, 59 Temple Place - Suite 330, 20Boston, 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 - PQImode, PHImode, 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. */ 64DEF_MACHMODE (VOIDmode, "VOID", MODE_RANDOM, 0, 0, VOIDmode) 65 66DEF_MACHMODE (PQImode, "PQI", MODE_PARTIAL_INT, 1, 1, PHImode) 67DEF_MACHMODE (QImode, "QI", MODE_INT, 1, 1, HImode) /* int types */ 68DEF_MACHMODE (PHImode, "PHI", MODE_PARTIAL_INT, 2, 2, PSImode) 69DEF_MACHMODE (HImode, "HI", MODE_INT, 2, 2, SImode) 70/* Pointers on some machines use this type to distinguish them from ints. 71 Useful if a pointer is 4 bytes but has some bits that are not significant, 72 so it is really not quite as wide as an integer. */ 73DEF_MACHMODE (PSImode, "PSI", MODE_PARTIAL_INT, 4, 4, PDImode) 74DEF_MACHMODE (SImode, "SI", MODE_INT, 4, 4, DImode) 75DEF_MACHMODE (PDImode, "PDI", MODE_PARTIAL_INT, 8, 8, VOIDmode) 76DEF_MACHMODE (DImode, "DI", MODE_INT, 8, 8, TImode) 77DEF_MACHMODE (TImode, "TI", MODE_INT, 16, 16, OImode) 78DEF_MACHMODE (OImode, "OI", MODE_INT, 32, 32, VOIDmode) 79 80DEF_MACHMODE (QFmode, "QF", MODE_FLOAT, 1, 1, HFmode) 81DEF_MACHMODE (HFmode, "HF", MODE_FLOAT, 2, 2, TQFmode) 82DEF_MACHMODE (TQFmode, "TQF", MODE_FLOAT, 3, 3, SFmode) /* MIL-STD-1750A */ 83DEF_MACHMODE (SFmode, "SF", MODE_FLOAT, 4, 4, DFmode) 84DEF_MACHMODE (DFmode, "DF", MODE_FLOAT, 8, 8, XFmode) 85DEF_MACHMODE (XFmode, "XF", MODE_FLOAT, 12, 12, TFmode) /* IEEE extended */ 86DEF_MACHMODE (TFmode, "TF", MODE_FLOAT, 16, 16, VOIDmode) 87 88/* Complex modes. */ 89DEF_MACHMODE (QCmode, "QC", MODE_COMPLEX_FLOAT, 2, 1, HCmode) 90DEF_MACHMODE (HCmode, "HC", MODE_COMPLEX_FLOAT, 4, 2, SCmode) 91DEF_MACHMODE (SCmode, "SC", MODE_COMPLEX_FLOAT, 8, 4, DCmode) 92DEF_MACHMODE (DCmode, "DC", MODE_COMPLEX_FLOAT, 16, 8, XCmode) 93DEF_MACHMODE (XCmode, "XC", MODE_COMPLEX_FLOAT, 24, 12, TCmode) 94DEF_MACHMODE (TCmode, "TC", MODE_COMPLEX_FLOAT, 32, 16, VOIDmode) 95 96DEF_MACHMODE (CQImode, "CQI", MODE_COMPLEX_INT, 2, 1, CHImode) 97DEF_MACHMODE (CHImode, "CHI", MODE_COMPLEX_INT, 4, 2, CSImode) 98DEF_MACHMODE (CSImode, "CSI", MODE_COMPLEX_INT, 8, 4, CDImode) 99DEF_MACHMODE (CDImode, "CDI", MODE_COMPLEX_INT, 16, 8, CTImode) 100DEF_MACHMODE (CTImode, "CTI", MODE_COMPLEX_INT, 32, 16, COImode) 101DEF_MACHMODE (COImode, "COI", MODE_COMPLEX_INT, 64, 32, VOIDmode) 102 103/* BLKmode is used for structures, arrays, etc. 104 that fit no more specific mode. */ 105DEF_MACHMODE (BLKmode, "BLK", MODE_RANDOM, 0, 0, VOIDmode) 106 107/* The modes for representing the condition codes come last. CCmode is 108 always defined. Additional modes for the condition code can be specified 109 in the EXTRA_CC_MODES macro. Everything but the names of the modes 110 are copied from CCmode. For these modes, GET_MODE_WIDER_MODE points 111 to the next defined CC mode, if any. */ 112 113DEF_MACHMODE (CCmode, "CC", MODE_CC, 4, 4, VOIDmode) 114 115/* The symbol Pmode stands for one of the above machine modes (usually SImode). 116 The tm file specifies which one. It is not a distinct mode. */ 117 118/* 119Local variables: 120mode:c 121version-control: t 122End: 123*/ 124