Return to machmode.def CVS log

Up to [Research Unix] / researchv10dc / cmd / gcc

Annotation of researchv10dc/cmd/gcc/machmode.def, revision 1.1

1.1     ! root        1: /* This file contains the definitions and documentation for the
        !             2:    machine modes used in the the GNU compiler.
        !             3:    Copyright (C) 1987 Free Software Foundation, Inc.
        !             4: 
        !             5: This file is part of GNU CC.
        !             6: 
        !             7: GNU CC is distributed in the hope that it will be useful,
        !             8: but WITHOUT ANY WARRANTY.  No author or distributor
        !             9: accepts responsibility to anyone for the consequences of using it
        !            10: or for whether it serves any particular purpose or works at all,
        !            11: unless he says so in writing.  Refer to the GNU CC General Public
        !            12: License for full details.
        !            13: 
        !            14: Everyone is granted permission to copy, modify and redistribute
        !            15: GNU CC, but only under the conditions described in the
        !            16: GNU CC General Public License.   A copy of this license is
        !            17: supposed to have been given to you along with GNU CC so you
        !            18: can know your rights and responsibilities.  It should be in a
        !            19: file named COPYING.  Among other things, the copyright notice
        !            20: and this notice must be preserved on all copies.  */
        !            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 read by for both the rtl and tree.
        !            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_COMPLEX_INT - pair of integers
        !            46:    MODE_COMPLEX_FLOAT - pair of floats
        !            47:    MODE_FUNCTION - Algol or Pascal function-variable incl. static chain
        !            48:    MODE_RANDOM - anything else
        !            49: 
        !            50:    Fourth argument is the size of the object, in bytes.
        !            51:    It is zero when the size is meaningless or not determined.
        !            52: 
        !            53:    Fifth arg is size of subunits of the object, in bytes.
        !            54:    It is same as the fourth argument except for complexes and EPmode,
        !            55:    since they are really made of two equal size subunits.  */
        !            56: 
        !            57: /* VOIDmode is used when no mode needs to be specified,
        !            58:    as for example on CONST_INT RTL expressions.  */
        !            59: DEF_MACHMODE (VOIDmode, "VOID", MODE_RANDOM, 0, 0)
        !            60: 
        !            61: DEF_MACHMODE (QImode, "QI", MODE_INT, 1, 1)            /* signed types */
        !            62: DEF_MACHMODE (HImode, "HI", MODE_INT, 2, 2)
        !            63: DEF_MACHMODE (SImode, "SI", MODE_INT, 4, 4)
        !            64: DEF_MACHMODE (DImode, "DI", MODE_INT, 8, 8)
        !            65: DEF_MACHMODE (TImode, "TI", MODE_INT, 16, 16)
        !            66: DEF_MACHMODE (QFmode, "QF", MODE_FLOAT, 1, 1)
        !            67: DEF_MACHMODE (HFmode, "HF", MODE_FLOAT, 2, 2)          /* floating types */
        !            68: DEF_MACHMODE (SFmode, "SF", MODE_FLOAT, 4, 4)
        !            69: DEF_MACHMODE (DFmode, "DF", MODE_FLOAT, 8, 8)
        !            70: DEF_MACHMODE (TFmode, "TF", MODE_FLOAT, 16, 16)
        !            71: DEF_MACHMODE (CQImode, "CQI", MODE_COMPLEX_INT, 2, 1)
        !            72: DEF_MACHMODE (CHImode, "CHI", MODE_COMPLEX_INT, 4, 2)  /* complex ints */
        !            73: DEF_MACHMODE (CSImode, "CSI", MODE_COMPLEX_INT, 8, 4)
        !            74: DEF_MACHMODE (CDImode, "CDI", MODE_COMPLEX_INT, 16, 8)
        !            75: DEF_MACHMODE (CTImode, "CTI", MODE_COMPLEX_INT, 32, 16)
        !            76: DEF_MACHMODE (CQFmode, "CQF", MODE_COMPLEX_FLOAT, 2, 1)
        !            77: DEF_MACHMODE (CHFmode, "CHF", MODE_COMPLEX_FLOAT, 4, 2)        /* complex floats */
        !            78: DEF_MACHMODE (CSFmode, "CSF", MODE_COMPLEX_FLOAT, 8, 4)
        !            79: DEF_MACHMODE (CDFmode, "CDF", MODE_COMPLEX_FLOAT, 16, 8)
        !            80: DEF_MACHMODE (CTFmode, "CTF", MODE_COMPLEX_FLOAT, 32, 16)
        !            81: 
        !            82: /* BImode is used only in FIELD_DECL nodes for bit fields
        !            83:    whose size and alignment are not such as to fit any other mode.  */
        !            84: DEF_MACHMODE (BImode, "BI", MODE_INT, 0, 0)    /* signed bit field */
        !            85: 
        !            86: /* BLKmode is used for structures, arrays, etc.
        !            87:    that fit no more specific mode.  */
        !            88: DEF_MACHMODE (BLKmode, "BLK", MODE_RANDOM, 0, 0)
        !            89: 
        !            90: /* Function-variable that includes a static chain.  */
        !            91: DEF_MACHMODE (EPmode, "EP", MODE_RANDOM, 8, 4)
        !            92: 
        !            93: /* The symbol Pmode stands for one of the above machine modes (usually SImode).
        !            94:    The tm file specifies which one.  It is not a distinct mode.  */
        !            95: 
        !            96: /*
        !            97: Local variables:
        !            98: mode:c
        !            99: version-control: t
        !           100: End:
        !           101: */

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.