/* This file contains the definitions and documentation for the machine modes used in the GNU compiler. Copyright (C) 1987, 1992, 1994, 1997, 1998, 2000 Free Software Foundation, Inc. This file is part of GCC. GCC 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. GCC 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 GCC; see the file COPYING. If not, write to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* This file defines all the MACHINE MODES used by GCC. 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 - PQImode, PHImode, PSImode and PDImode MODE_CC - modes used for representing the condition code in a register MODE_COMPLEX_INT, MODE_COMPLEX_FLOAT - complex number MODE_VECTOR_INT, MODE_VECTOR_FLOAT - vector MODE_RANDOM - anything else Fourth argument is the relative size of the object, in bits, so we can have modes smaller than 1 byte. Fifth 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. Sixth arg is the relative size of subunits of the object. It is same as the fifth argument except for complexes and vectors, since they are really made of many equal size subunits. Seventh arg is next wider natural mode of the same class. 0 if there is none. Vector modes use this field to point to the next vector size, so we can iterate through the different vectors modes. The ordering is by increasing byte size, with QI coming before HI, HI before SI, etc. */ /* 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, 0, VOIDmode) DEF_MACHMODE (BImode, "BI", MODE_INT, 1, 1, 1, QImode) DEF_MACHMODE (QImode, "QI", MODE_INT, BITS_PER_UNIT, 1, 1, HImode) DEF_MACHMODE (HImode, "HI", MODE_INT, BITS_PER_UNIT*2, 2, 2, SImode) DEF_MACHMODE (SImode, "SI", MODE_INT, BITS_PER_UNIT*4, 4, 4, DImode) DEF_MACHMODE (DImode, "DI", MODE_INT, BITS_PER_UNIT*8, 8, 8, TImode) DEF_MACHMODE (TImode, "TI", MODE_INT, BITS_PER_UNIT*16, 16, 16, OImode) DEF_MACHMODE (OImode, "OI", MODE_INT, BITS_PER_UNIT*32, 32, 32, VOIDmode) /* Pointers on some machines use these types 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 (PQImode, "PQI", MODE_PARTIAL_INT, BITS_PER_UNIT, 1, 1, PHImode) DEF_MACHMODE (PHImode, "PHI", MODE_PARTIAL_INT, BITS_PER_UNIT*2, 2, 2, PSImode) DEF_MACHMODE (PSImode, "PSI", MODE_PARTIAL_INT, BITS_PER_UNIT*4, 4, 4, PDImode) DEF_MACHMODE (PDImode, "PDI", MODE_PARTIAL_INT, BITS_PER_UNIT*8, 8, 8, VOIDmode) DEF_MACHMODE (QFmode, "QF", MODE_FLOAT, BITS_PER_UNIT, 1, 1, HFmode) DEF_MACHMODE (HFmode, "HF", MODE_FLOAT, BITS_PER_UNIT*2, 2, 2, TQFmode) DEF_MACHMODE (TQFmode, "TQF", MODE_FLOAT, BITS_PER_UNIT*3, 3, 3, SFmode) /* MIL-STD-1750A */ DEF_MACHMODE (SFmode, "SF", MODE_FLOAT, BITS_PER_UNIT*4, 4, 4, DFmode) DEF_MACHMODE (DFmode, "DF", MODE_FLOAT, BITS_PER_UNIT*8, 8, 8, XFmode) DEF_MACHMODE (XFmode, "XF", MODE_FLOAT, BITS_PER_UNIT*12, 12, 12, TFmode) /* IEEE extended */ DEF_MACHMODE (TFmode, "TF", MODE_FLOAT, BITS_PER_UNIT*16, 16, 16, VOIDmode) /* Complex modes. */ DEF_MACHMODE (QCmode, "QC", MODE_COMPLEX_FLOAT, BITS_PER_UNIT*2, 2, 1, HCmode) DEF_MACHMODE (HCmode, "HC", MODE_COMPLEX_FLOAT, BITS_PER_UNIT*4, 4, 2, SCmode) DEF_MACHMODE (SCmode, "SC", MODE_COMPLEX_FLOAT, BITS_PER_UNIT*8, 8, 4, DCmode) DEF_MACHMODE (DCmode, "DC", MODE_COMPLEX_FLOAT, BITS_PER_UNIT*16, 16, 8, XCmode) DEF_MACHMODE (XCmode, "XC", MODE_COMPLEX_FLOAT, BITS_PER_UNIT*24, 24, 12, TCmode) DEF_MACHMODE (TCmode, "TC", MODE_COMPLEX_FLOAT, BITS_PER_UNIT*32, 32, 16, VOIDmode) DEF_MACHMODE (CQImode, "CQI", MODE_COMPLEX_INT, BITS_PER_UNIT*2, 2, 1, CHImode) DEF_MACHMODE (CHImode, "CHI", MODE_COMPLEX_INT, BITS_PER_UNIT*4, 4, 2, CSImode) DEF_MACHMODE (CSImode, "CSI", MODE_COMPLEX_INT, BITS_PER_UNIT*8, 8, 4, CDImode) DEF_MACHMODE (CDImode, "CDI", MODE_COMPLEX_INT, BITS_PER_UNIT*16, 16, 8, CTImode) DEF_MACHMODE (CTImode, "CTI", MODE_COMPLEX_INT, BITS_PER_UNIT*32, 32, 16, COImode) DEF_MACHMODE (COImode, "COI", MODE_COMPLEX_INT, BITS_PER_UNIT*64, 64, 32, VOIDmode) /* Vector modes. */ /* There are no V1xx vector modes. These are equivalent to normal scalar modes. */ /* The wider mode field for vectors follows in order of increasing bit size with QI coming before HI, HI before SI, and SI before DI within same bit sizes. */ DEF_MACHMODE (V2QImode, "V2QI", MODE_VECTOR_INT, BITS_PER_UNIT*2, 2, 1, V4QImode) DEF_MACHMODE (V2HImode, "V2HI", MODE_VECTOR_INT, BITS_PER_UNIT*4, 4, 2, V8QImode) DEF_MACHMODE (V2SImode, "V2SI", MODE_VECTOR_INT, BITS_PER_UNIT*8, 8, 4, V16QImode) DEF_MACHMODE (V2DImode, "V2DI", MODE_VECTOR_INT, BITS_PER_UNIT*16, 16, 8, V8SImode) DEF_MACHMODE (V4QImode, "V4QI", MODE_VECTOR_INT, BITS_PER_UNIT*4, 4, 1, V2HImode) DEF_MACHMODE (V4HImode, "V4HI", MODE_VECTOR_INT, BITS_PER_UNIT*8, 8, 2, V2SImode) DEF_MACHMODE (V4SImode, "V4SI", MODE_VECTOR_INT, BITS_PER_UNIT*16, 16, 4, V2DImode) DEF_MACHMODE (V4DImode, "V4DI", MODE_VECTOR_INT, BITS_PER_UNIT*32, 32, 8, V8DImode) DEF_MACHMODE (V8QImode, "V8QI", MODE_VECTOR_INT, BITS_PER_UNIT*8, 8, 1, V4HImode) DEF_MACHMODE (V8HImode, "V8HI", MODE_VECTOR_INT, BITS_PER_UNIT*16, 16, 2, V4SImode) DEF_MACHMODE (V8SImode, "V8SI", MODE_VECTOR_INT, BITS_PER_UNIT*32, 32, 4, V4DImode) DEF_MACHMODE (V8DImode, "V8DI", MODE_VECTOR_INT, BITS_PER_UNIT*64, 64, 8, VOIDmode) DEF_MACHMODE (V16QImode, "V16QI", MODE_VECTOR_INT, BITS_PER_UNIT*16, 16, 1, V8HImode) DEF_MACHMODE (V2SFmode, "V2SF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*8, 8, 4, V4SFmode) DEF_MACHMODE (V2DFmode, "V2DF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*16, 16, 8, V8SFmode) DEF_MACHMODE (V4SFmode, "V4SF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*16, 16, 4, V2DFmode) DEF_MACHMODE (V4DFmode, "V4DF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*32, 32, 8, V8DFmode) DEF_MACHMODE (V8SFmode, "V8SF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*32, 32, 4,V4DFmode) DEF_MACHMODE (V8DFmode, "V8DF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*64, 64, 8, VOIDmode) /* BLKmode is used for structures, arrays, etc. that fit no more specific mode. */ DEF_MACHMODE (BLKmode, "BLK", MODE_RANDOM, 0, 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. All MODE_CC modes are the same width as SImode and have VOIDmode as their next wider mode. */ #define CC(E, M) DEF_MACHMODE (E, M, MODE_CC, BITS_PER_UNIT*4, 4, 4, VOIDmode) CC (CCmode, "CC") #ifdef EXTRA_CC_MODES EXTRA_CC_MODES #endif #undef CC /* 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. Nevertheless, while processing the md file, we wish to treat as a distinct mode so that it is preserved intact through to the insn-foo.c files. This eliminates a lot of redundancy in ports that support both 32-bit and 64-bit targets. */ #ifdef GENERATOR_FILE #undef Pmode DEF_MACHMODE (Pmode, "P", MODE_RANDOM, 0, 0, 0, VOIDmode) #endif /* Local variables: mode:c version-control: t End: */