Initial revision

From-SVN: r26

1 files changed, 106 insertions, 0 deletions

diff --git a/gcc/machmode.def b/gcc/machmode.def
new file mode 100644
index 0000000..018d9ed
--- /dev/null
+++ b/gcc/machmode.def
@@ -0,0 +1,106 @@
+/* This file contains the definitions and documentation for the
+   machine modes used in the the GNU compiler.
+   Copyright (C) 1987-1990 Free Software Foundation, Inc.
+
+This file is part of GNU CC.
+
+GNU CC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU CC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU CC; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+
+/* This file defines all the MACHINE MODES used by GNU CC.
+
+   A machine mode specifies a size and format of data
+   at the machine level.
+
+   Each RTL expression has a machine mode.
+
+   At the syntax tree level, each ..._TYPE and each ..._DECL node
+   has a machine mode which describes data of that type or the
+   data of the variable declared.  */
+
+/* The first argument is the internal name of the machine mode
+   used in the C source.
+   By convention these are in UPPER_CASE, except for the word  "mode".
+
+   The second argument  is the name of the machine mode in the
+   external ASCII format used for reading and printing RTL and trees.
+   By convention these names in UPPER_CASE.
+
+   Third argument states the kind of representation:
+   MODE_INT - integer
+   MODE_FLOAT - floating
+   MODE_PARTIAL_INT - PSImode and PDImode
+   MODE_CC - modes used for representing the condition code in a register
+   MODE_COMPLEX_INT, MODE_COMPLEX_FLOAT - complex number
+   MODE_RANDOM - anything else
+
+   Fourth argument is the relative size of the object, in bytes.
+   It is zero when the size is meaningless or not determined.
+   A byte's size is determined by BITS_PER_UNIT in tm.h. 
+
+
+   Fifth arg is the relative size of subunits of the object.
+   It is same as the fourth argument except for complexes,
+   since they are really made of two equal size subunits.
+
+   Sixth arg is next wider natural mode of the same class.
+   0 if there is none.  */
+
+/* VOIDmode is used when no mode needs to be specified,
+   as for example on CONST_INT RTL expressions.  */
+DEF_MACHMODE (VOIDmode, "VOID", MODE_RANDOM, 0, 0, VOIDmode)
+
+DEF_MACHMODE (QImode, "QI", MODE_INT, 1, 1, HImode)		/* int types */
+DEF_MACHMODE (HImode, "HI", MODE_INT, 2, 2, SImode)
+/* Pointers on some machines use this type to distinguish them from ints.
+   Useful if a pointer is 4 bytes but has some bits that are not significant,
+   so it is really not quite as wide as an integer.  */
+DEF_MACHMODE (PSImode, "PSI", MODE_PARTIAL_INT, 4, 4, VOIDmode)
+DEF_MACHMODE (SImode, "SI", MODE_INT, 4, 4, DImode)
+DEF_MACHMODE (PDImode, "PDI", MODE_PARTIAL_INT, 8, 8, VOIDmode)
+DEF_MACHMODE (DImode, "DI", MODE_INT, 8, 8, TImode)
+DEF_MACHMODE (TImode, "TI", MODE_INT, 16, 16, VOIDmode)
+
+DEF_MACHMODE (SFmode, "SF", MODE_FLOAT, 4, 4, DFmode)
+DEF_MACHMODE (DFmode, "DF", MODE_FLOAT, 8, 8, XFmode)
+DEF_MACHMODE (XFmode, "XF", MODE_FLOAT, 12, 12, TFmode)   /* IEEE extended */
+DEF_MACHMODE (TFmode, "TF", MODE_FLOAT, 16, 16, VOIDmode)
+
+DEF_MACHMODE (SCmode, "SC", MODE_COMPLEX_FLOAT, 8, 4, DCmode)
+DEF_MACHMODE (DCmode, "DC", MODE_COMPLEX_FLOAT, 16, 8, XCmode)
+DEF_MACHMODE (XCmode, "XC", MODE_COMPLEX_FLOAT, 24, 12, TCmode)
+DEF_MACHMODE (TCmode, "TC", MODE_COMPLEX_FLOAT, 32, 16, VOIDmode)
+
+/* BLKmode is used for structures, arrays, etc.
+   that fit no more specific mode.  */
+DEF_MACHMODE (BLKmode, "BLK", MODE_RANDOM, 0, 0, VOIDmode)
+
+/* The modes for representing the condition codes come last.  CCmode is
+   always defined.  Additional modes for the condition code can be specified
+   in the EXTRA_CC_MODES macro.  Everything but the names of the modes
+   are copied from CCmode.  For these modes, GET_MODE_WIDER_MODE points
+   to the next defined CC mode, if any.  */
+
+DEF_MACHMODE (CCmode, "CC", MODE_CC, 4, 4, VOIDmode)
+
+/* The symbol Pmode stands for one of the above machine modes (usually SImode).
+   The tm file specifies which one.  It is not a distinct mode.  */
+
+/*
+Local variables:
+mode:c
+version-control: t
+End:
+*/