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Annotation of GNUtools/emacs/src/m-aviion.h, revision 1.1

1.1     ! root        1: /* m- file for Data General AViiON.
        !             2:    Copyright (C) 1985, 1986, 1991 Free Software Foundation, Inc.
        !             3: 
        !             4: This file is part of GNU Emacs.
        !             5: 
        !             6: GNU Emacs is free software; you can redistribute it and/or modify
        !             7: it under the terms of the GNU General Public License as published by
        !             8: the Free Software Foundation; either version 1, or (at your option)
        !             9: any later version.
        !            10: 
        !            11: GNU Emacs is distributed in the hope that it will be useful,
        !            12: but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            14: GNU General Public License for more details.
        !            15: 
        !            16: You should have received a copy of the GNU General Public License
        !            17: along with GNU Emacs; see the file COPYING.  If not, write to
        !            18: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
        !            19: 
        !            20: 
        !            21: /* The following three symbols give information on
        !            22:  the size of various data types.  */
        !            23: 
        !            24: #define SHORTBITS 16           /* Number of bits in a short */
        !            25: 
        !            26: #define INTBITS 32             /* Number of bits in an int */
        !            27: 
        !            28: #define LONGBITS 32            /* Number of bits in a long */
        !            29: 
        !            30: /* Define BIG_ENDIAN iff lowest-numbered byte in a word
        !            31:    is the most significant byte.  */
        !            32: 
        !            33: #define BIG_ENDIAN
        !            34: 
        !            35: /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
        !            36:  * group of arguments and treat it as an array of the arguments.  */
        !            37: 
        !            38: #define NO_ARG_ARRAY
        !            39: 
        !            40: /* Define WORD_MACHINE if addresses and such have
        !            41:  * to be corrected before they can be used as byte counts.  */
        !            42: 
        !            43: #define WORD_MACHINE
        !            44: 
        !            45: /* Define how to take a char and sign-extend into an int.
        !            46:    On machines where char is signed, this is a no-op.  */
        !            47: 
        !            48: #define SIGN_EXTEND_CHAR(c) (c)
        !            49: 
        !            50: /* Define DATA_SEG_BITS if pointers need to be corrected with
        !            51:    a segment field.  */
        !            52: 
        !            53: #ifdef FIX_ADDRESS
        !            54: #define DATA_SEG_BITS 0xef000000
        !            55: #endif
        !            56: 
        !            57: /* Now define a symbol for the cpu type, if your compiler
        !            58:    does not define it automatically:
        !            59:    Ones defined so far include vax, m68000, ns16000, pyramid,
        !            60:    orion, tahoe, APOLLO and many others */
        !            61: 
        !            62: #ifndef m88k
        !            63: #define m88k
        !            64: #endif
        !            65: 
        !            66: /* Use type int rather than a union, to represent Lisp_Object */
        !            67: /* This is desirable for most machines.  */
        !            68: 
        !            69: #define NO_UNION_TYPE
        !            70: 
        !            71: /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
        !            72:    the 24-bit bit field into an int.  In other words, if bit fields
        !            73:    are always unsigned.
        !            74: 
        !            75:    If you use NO_UNION_TYPE, this flag does not matter.  */
        !            76: 
        !            77: #define EXPLICIT_SIGN_EXTEND
        !            78: 
        !            79: /* Data type of load average, as read out of kmem.  */
        !            80: 
        !            81: /* #define LOAD_AVE_TYPE long */
        !            82: 
        !            83: /* Convert that into an integer that is 100 for a load average of 1.0  */
        !            84: 
        !            85: /* #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE) */
        !            86: 
        !            87: /* Define CANNOT_DUMP on machines where unexec does not work.
        !            88:    Then the function dump-emacs will not be defined
        !            89:    and temacs will do (load "loadup") automatically unless told otherwise.  */
        !            90: 
        !            91: /* #define CANNOT_DUMP */
        !            92: 
        !            93: /* Define VIRT_ADDR_VARIES if the virtual addresses of
        !            94:    pure and impure space as loaded can vary, and even their
        !            95:    relative order cannot be relied on.
        !            96: 
        !            97:    Otherwise Emacs assumes that text space precedes data space,
        !            98:    numerically.  */
        !            99: 
        !           100: /* #define VIRT_ADDR_VARIES */
        !           101: 
        !           102: /* Define C_ALLOCA if this machine does not support a true alloca
        !           103:    and the one written in C should be used instead.
        !           104:    Define HAVE_ALLOCA to say that the system provides a properly
        !           105:    working alloca function and it should be used.
        !           106:    Define neither one if an assembler-language alloca
        !           107:    in the file alloca.s should be used.  */
        !           108: 
        !           109: /* #define C_ALLOCA */
        !           110: #define HAVE_ALLOCA
        !           111: #define alloca(x) __builtin_alloca(x)
        !           112: 
        !           113: /* Define NO_REMAP if memory segmentation makes it not work well
        !           114:    to change the boundary between the text section and data section
        !           115:    when Emacs is dumped.  If you define this, the preloaded Lisp
        !           116:    code will not be sharable; but that's better than failing completely.  */
        !           117: 
        !           118: #define NO_REMAP
        !           119: 
        !           120: /* Use 26 bits instead of 24 for internal pointer values */
        !           121: 
        !           122: #define VALBITS 26
        !           123: #define GCTYPEBITS 5
        !           124: 
        !           125: /* Define ADDR_CORRECT(ADDR) to be a macro to correct an int which is
        !           126:    the bit pattern of a pointer to a byte into an int which is the
        !           127:    number of a byte.
        !           128: 
        !           129:    This macro has a default definition which is usually right.
        !           130:    This default definition is a no-op on most machines (where a
        !           131:    pointer looks like an int) but not on all machines. */
        !           132: 
        !           133: #define        ADDR_CORRECT(ADDR) ((int)ADDR)
        !           134: 
        !           135: /* Cast pointers to this type to compare them. */
        !           136: 
        !           137: #define        PNTR_COMPARISON_TYPE    void *
        !           138: 
        !           139: /* Some machines that use COFF executables require that each section
        !           140:    start on a certain boundary *in the COFF file*.  Such machines should
        !           141:    define SECTION_ALIGNMENT to a mask of the low-order bits that must be
        !           142:    zero on such a boundary.  This mask is used to control padding between
        !           143:    segments in the COFF file.
        !           144: 
        !           145:    If SECTION_ALIGNMENT is not defined, the segments are written
        !           146:    consecutively with no attempt at alignment.  This is right for
        !           147:    unmodified system V.  */
        !           148: 
        !           149: #define SECTION_ALIGNMENT 0x7
        !           150: 

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