| /* 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. |
| |
| Eigth arg is the mode of the internal elements in a vector. |
| VOIDmode if not a vector. |
| */ |
| |
| /* 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, VOIDmode) |
| |
| DEF_MACHMODE (BImode, "BI", MODE_INT, 1, 1, 1, QImode, VOIDmode) |
| DEF_MACHMODE (QImode, "QI", MODE_INT, BITS_PER_UNIT, 1, 1, HImode, VOIDmode) |
| DEF_MACHMODE (HImode, "HI", MODE_INT, BITS_PER_UNIT*2, 2, 2, SImode, VOIDmode) |
| DEF_MACHMODE (SImode, "SI", MODE_INT, BITS_PER_UNIT*4, 4, 4, DImode, VOIDmode) |
| DEF_MACHMODE (DImode, "DI", MODE_INT, BITS_PER_UNIT*8, 8, 8, TImode, VOIDmode) |
| DEF_MACHMODE (TImode, "TI", MODE_INT, BITS_PER_UNIT*16, 16, 16, OImode, VOIDmode) |
| DEF_MACHMODE (OImode, "OI", MODE_INT, BITS_PER_UNIT*32, 32, 32, VOIDmode, 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, VOIDmode) |
| DEF_MACHMODE (PHImode, "PHI", MODE_PARTIAL_INT, BITS_PER_UNIT*2, 2, 2, PSImode, VOIDmode) |
| DEF_MACHMODE (PSImode, "PSI", MODE_PARTIAL_INT, BITS_PER_UNIT*4, 4, 4, PDImode, VOIDmode) |
| DEF_MACHMODE (PDImode, "PDI", MODE_PARTIAL_INT, BITS_PER_UNIT*8, 8, 8, VOIDmode, VOIDmode) |
| |
| DEF_MACHMODE (QFmode, "QF", MODE_FLOAT, BITS_PER_UNIT, 1, 1, HFmode, VOIDmode) |
| DEF_MACHMODE (HFmode, "HF", MODE_FLOAT, BITS_PER_UNIT*2, 2, 2, TQFmode, VOIDmode) |
| DEF_MACHMODE (TQFmode, "TQF", MODE_FLOAT, BITS_PER_UNIT*3, 3, 3, SFmode, VOIDmode) /* MIL-STD-1750A */ |
| DEF_MACHMODE (SFmode, "SF", MODE_FLOAT, BITS_PER_UNIT*4, 4, 4, DFmode, VOIDmode) |
| DEF_MACHMODE (DFmode, "DF", MODE_FLOAT, BITS_PER_UNIT*8, 8, 8, XFmode, VOIDmode) |
| DEF_MACHMODE (XFmode, "XF", MODE_FLOAT, BITS_PER_UNIT*12, 12, 12, TFmode, VOIDmode) /* IEEE extended */ |
| DEF_MACHMODE (TFmode, "TF", MODE_FLOAT, BITS_PER_UNIT*16, 16, 16, VOIDmode, VOIDmode) |
| |
| /* Complex modes. */ |
| DEF_MACHMODE (QCmode, "QC", MODE_COMPLEX_FLOAT, BITS_PER_UNIT*2, 2, 1, HCmode, VOIDmode) |
| DEF_MACHMODE (HCmode, "HC", MODE_COMPLEX_FLOAT, BITS_PER_UNIT*4, 4, 2, SCmode, VOIDmode) |
| DEF_MACHMODE (SCmode, "SC", MODE_COMPLEX_FLOAT, BITS_PER_UNIT*8, 8, 4, DCmode, VOIDmode) |
| DEF_MACHMODE (DCmode, "DC", MODE_COMPLEX_FLOAT, BITS_PER_UNIT*16, 16, 8, XCmode, VOIDmode) |
| DEF_MACHMODE (XCmode, "XC", MODE_COMPLEX_FLOAT, BITS_PER_UNIT*24, 24, 12, TCmode, VOIDmode) |
| DEF_MACHMODE (TCmode, "TC", MODE_COMPLEX_FLOAT, BITS_PER_UNIT*32, 32, 16, VOIDmode, VOIDmode) |
| |
| DEF_MACHMODE (CQImode, "CQI", MODE_COMPLEX_INT, BITS_PER_UNIT*2, 2, 1, CHImode, VOIDmode) |
| DEF_MACHMODE (CHImode, "CHI", MODE_COMPLEX_INT, BITS_PER_UNIT*4, 4, 2, CSImode, VOIDmode) |
| DEF_MACHMODE (CSImode, "CSI", MODE_COMPLEX_INT, BITS_PER_UNIT*8, 8, 4, CDImode, VOIDmode) |
| DEF_MACHMODE (CDImode, "CDI", MODE_COMPLEX_INT, BITS_PER_UNIT*16, 16, 8, CTImode, VOIDmode) |
| DEF_MACHMODE (CTImode, "CTI", MODE_COMPLEX_INT, BITS_PER_UNIT*32, 32, 16, COImode, VOIDmode) |
| DEF_MACHMODE (COImode, "COI", MODE_COMPLEX_INT, BITS_PER_UNIT*64, 64, 32, VOIDmode, 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, QImode) |
| DEF_MACHMODE (V2HImode, "V2HI", MODE_VECTOR_INT, BITS_PER_UNIT*4, 4, 2, V8QImode, HImode) |
| DEF_MACHMODE (V2SImode, "V2SI", MODE_VECTOR_INT, BITS_PER_UNIT*8, 8, 4, V16QImode, SImode) |
| DEF_MACHMODE (V2DImode, "V2DI", MODE_VECTOR_INT, BITS_PER_UNIT*16, 16, 8, V8SImode, DImode) |
| |
| DEF_MACHMODE (V4QImode, "V4QI", MODE_VECTOR_INT, BITS_PER_UNIT*4, 4, 1, V2HImode, QImode) |
| DEF_MACHMODE (V4HImode, "V4HI", MODE_VECTOR_INT, BITS_PER_UNIT*8, 8, 2, V2SImode, HImode) |
| DEF_MACHMODE (V4SImode, "V4SI", MODE_VECTOR_INT, BITS_PER_UNIT*16, 16, 4, V2DImode, SImode) |
| DEF_MACHMODE (V4DImode, "V4DI", MODE_VECTOR_INT, BITS_PER_UNIT*32, 32, 8, V8DImode, DImode) |
| |
| DEF_MACHMODE (V8QImode, "V8QI", MODE_VECTOR_INT, BITS_PER_UNIT*8, 8, 1, V4HImode, QImode) |
| DEF_MACHMODE (V8HImode, "V8HI", MODE_VECTOR_INT, BITS_PER_UNIT*16, 16, 2, V4SImode, HImode) |
| DEF_MACHMODE (V8SImode, "V8SI", MODE_VECTOR_INT, BITS_PER_UNIT*32, 32, 4, V4DImode, SImode) |
| DEF_MACHMODE (V8DImode, "V8DI", MODE_VECTOR_INT, BITS_PER_UNIT*64, 64, 8, VOIDmode, DImode) |
| |
| DEF_MACHMODE (V16QImode, "V16QI", MODE_VECTOR_INT, BITS_PER_UNIT*16, 16, 1, V8HImode, QImode) |
| |
| DEF_MACHMODE (V2SFmode, "V2SF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*8, 8, 4, V4SFmode, SFmode) |
| DEF_MACHMODE (V2DFmode, "V2DF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*16, 16, 8, V8SFmode, DFmode) |
| |
| DEF_MACHMODE (V4SFmode, "V4SF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*16, 16, 4, V2DFmode, SFmode) |
| DEF_MACHMODE (V4DFmode, "V4DF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*32, 32, 8, V8DFmode, DFmode) |
| |
| DEF_MACHMODE (V8SFmode, "V8SF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*32, 32, 4,V4DFmode, SFmode) |
| DEF_MACHMODE (V8DFmode, "V8DF", MODE_VECTOR_FLOAT, BITS_PER_UNIT*64, 64, 8, VOIDmode, DFmode) |
| DEF_MACHMODE (V16SFmode, "V16SF", MODE_VECTOR_FLOAT, 512, 64, 4, VOIDmode, SFmode) |
| |
| /* BLKmode is used for structures, arrays, etc. |
| that fit no more specific mode. */ |
| DEF_MACHMODE (BLKmode, "BLK", MODE_RANDOM, 0, 0, 0, VOIDmode, 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, 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, VOIDmode) |
| #endif |
| |
| /* |
| Local variables: |
| mode:c |
| version-control: t |
| End: |
| */ |
