gcc/machmode.def

   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
   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 - 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_VECTOR_INT, MODE_VECTOR_FLOAT - vector
  49    MODE_RANDOM - anything else
  50
  51    Fourth argument is the relative size of the object, in bytes.
  52    It is zero when the size is meaningless or not determined.
  53    A byte's size is determined by BITS_PER_UNIT in tm.h.
  54
  55
  56    Fifth arg is the relative size of subunits of the object.
  57    It is same as the fourth argument except for complexes,
  58    since they are really made of two equal size subunits.
  59
  60    Sixth arg is next wider natural mode of the same class.
  61    0 if there is none.  */
  62
  63 /* VOIDmode is used when no mode needs to be specified,
  64    as for example on CONST_INT RTL expressions.  */
  65 DEF_MACHMODE (VOIDmode, "VOID", MODE_RANDOM, 0, 0, VOIDmode)
  66
  67 DEF_MACHMODE (PQImode, "PQI", MODE_PARTIAL_INT, 1, 1, PHImode)
  68 DEF_MACHMODE (QImode, "QI", MODE_INT, 1, 1, HImode)             /* int types */
  69 DEF_MACHMODE (PHImode, "PHI", MODE_PARTIAL_INT, 2, 2, PSImode)
  70 DEF_MACHMODE (HImode, "HI", MODE_INT, 2, 2, SImode)
  71 /* Pointers on some machines use this type to distinguish them from ints.
  72    Useful if a pointer is 4 bytes but has some bits that are not significant,
  73    so it is really not quite as wide as an integer.  */
  74 DEF_MACHMODE (PSImode, "PSI", MODE_PARTIAL_INT, 4, 4, PDImode)
  75 DEF_MACHMODE (SImode, "SI", MODE_INT, 4, 4, DImode)
  76 DEF_MACHMODE (PDImode, "PDI", MODE_PARTIAL_INT, 8, 8, VOIDmode)
  77 DEF_MACHMODE (DImode, "DI", MODE_INT, 8, 8, TImode)
  78 DEF_MACHMODE (TImode, "TI", MODE_INT, 16, 16, OImode)
  79 DEF_MACHMODE (OImode, "OI", MODE_INT, 32, 32, VOIDmode)
  80
  81 DEF_MACHMODE (QFmode, "QF", MODE_FLOAT, 1, 1, HFmode)
  82 DEF_MACHMODE (HFmode, "HF", MODE_FLOAT, 2, 2, TQFmode)
  83 DEF_MACHMODE (TQFmode, "TQF", MODE_FLOAT, 3, 3, SFmode)  /* MIL-STD-1750A */
  84 DEF_MACHMODE (SFmode, "SF", MODE_FLOAT, 4, 4, DFmode)
  85 DEF_MACHMODE (DFmode, "DF", MODE_FLOAT, 8, 8, XFmode)
  86 DEF_MACHMODE (XFmode, "XF", MODE_FLOAT, 12, 12, TFmode)   /* IEEE extended */
  87 DEF_MACHMODE (TFmode, "TF", MODE_FLOAT, 16, 16, VOIDmode)
  88
  89 /* Complex modes.  */
  90 DEF_MACHMODE (QCmode, "QC", MODE_COMPLEX_FLOAT, 2, 1, HCmode)
  91 DEF_MACHMODE (HCmode, "HC", MODE_COMPLEX_FLOAT, 4, 2, SCmode)
  92 DEF_MACHMODE (SCmode, "SC", MODE_COMPLEX_FLOAT, 8, 4, DCmode)
  93 DEF_MACHMODE (DCmode, "DC", MODE_COMPLEX_FLOAT, 16, 8, XCmode)
  94 DEF_MACHMODE (XCmode, "XC", MODE_COMPLEX_FLOAT, 24, 12, TCmode)
  95 DEF_MACHMODE (TCmode, "TC", MODE_COMPLEX_FLOAT, 32, 16, VOIDmode)
  96
  97 DEF_MACHMODE (CQImode, "CQI", MODE_COMPLEX_INT, 2, 1, CHImode)
  98 DEF_MACHMODE (CHImode, "CHI", MODE_COMPLEX_INT, 4, 2, CSImode)
  99 DEF_MACHMODE (CSImode, "CSI", MODE_COMPLEX_INT, 8, 4, CDImode)
 100 DEF_MACHMODE (CDImode, "CDI", MODE_COMPLEX_INT, 16, 8, CTImode)
 101 DEF_MACHMODE (CTImode, "CTI", MODE_COMPLEX_INT, 32, 16, COImode)
 102 DEF_MACHMODE (COImode, "COI", MODE_COMPLEX_INT, 64, 32, VOIDmode)
 103
 104 /* Vector modes.  */
 105 /* There are no V1xx vector modes.  These are equivalent to normal non-vector
 106    modes.  */
 107 DEF_MACHMODE (V2QImode, "V2QI", MODE_VECTOR_INT, 2, 1, VOIDmode)
 108 DEF_MACHMODE (V2HImode, "V2HI", MODE_VECTOR_INT, 4, 2, VOIDmode)
 109 DEF_MACHMODE (V2SImode, "V2SI", MODE_VECTOR_INT, 8, 4, VOIDmode)
 110 DEF_MACHMODE (V2DImode, "V2DI", MODE_VECTOR_INT, 16, 8, VOIDmode)
 111
 112 DEF_MACHMODE (V4QImode, "V4QI", MODE_VECTOR_INT, 4, 1, VOIDmode)
 113 DEF_MACHMODE (V4HImode, "V4HI", MODE_VECTOR_INT, 8, 2, VOIDmode)
 114 DEF_MACHMODE (V4SImode, "V4SI", MODE_VECTOR_INT, 16, 4, VOIDmode)
 115 DEF_MACHMODE (V4DImode, "V4DI", MODE_VECTOR_INT, 32, 8, VOIDmode)
 116
 117 DEF_MACHMODE (V8QImode, "V8QI", MODE_VECTOR_INT, 8, 1, VOIDmode)
 118 DEF_MACHMODE (V8HImode, "V8HI", MODE_VECTOR_INT, 16, 2, VOIDmode)
 119 DEF_MACHMODE (V8SImode, "V8SI", MODE_VECTOR_INT, 32, 4, VOIDmode)
 120 DEF_MACHMODE (V8DImode, "V8DI", MODE_VECTOR_INT, 64, 8, VOIDmode)
 121
 122 DEF_MACHMODE (V2SFmode, "V2SF", MODE_VECTOR_FLOAT, 8, 4, VOIDmode)
 123 DEF_MACHMODE (V2DFmode, "V2DF", MODE_VECTOR_FLOAT, 16, 8, VOIDmode)
 124
 125 DEF_MACHMODE (V4SFmode, "V4SF", MODE_VECTOR_FLOAT, 16, 4, VOIDmode)
 126 DEF_MACHMODE (V4DFmode, "V4DF", MODE_VECTOR_FLOAT, 32, 8, VOIDmode)
 127
 128 DEF_MACHMODE (V8SFmode, "V8SF", MODE_VECTOR_FLOAT, 32, 4, VOIDmode)
 129 DEF_MACHMODE (V8DFmode, "V8DF", MODE_VECTOR_FLOAT, 64, 8, VOIDmode)
 130
 131 /* BLKmode is used for structures, arrays, etc.
 132    that fit no more specific mode.  */
 133 DEF_MACHMODE (BLKmode, "BLK", MODE_RANDOM, 0, 0, VOIDmode)
 134
 135 /* The modes for representing the condition codes come last.  CCmode is
 136    always defined.  Additional modes for the condition code can be specified
 137    in the EXTRA_CC_MODES macro.
 138    All MODE_CC modes are the same width as SImode and have VOIDmode as their
 139    next wider mode.
 140 */
 141
 142 #define CC(E, M)  DEF_MACHMODE (E, M, MODE_CC, 4, 4, VOIDmode)
 143
 144 CC (CCmode, "CC")
 145
 146 #ifdef EXTRA_CC_MODES
 147 EXTRA_CC_MODES
 148 #endif
 149
 150 #undef CC
 151
 152 /* The symbol Pmode stands for one of the above machine modes (usually SImode).
 153    The tm file specifies which one.  It is not a distinct mode.  */
 154
 155 /*
 156 Local variables:
 157 mode:c
 158 version-control: t
 159 End:
 160 */