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Annotation of GNUtools/emacs/src/m-mg1.h, revision 1.1

1.1     ! root        1: /* m- file for Whitechapel Computer Works MG1 (ns16000 based).
        !             2:    Copyright (C) 1985 Free Software Foundation, Inc.
        !             3:    MG-1 version by L.M.McLoughlin
        !             4: 
        !             5: This file is part of GNU Emacs.
        !             6: 
        !             7: GNU Emacs is free software; you can redistribute it and/or modify
        !             8: it under the terms of the GNU General Public License as published by
        !             9: the Free Software Foundation; either version 1, or (at your option)
        !            10: any later version.
        !            11: 
        !            12: GNU Emacs is distributed in the hope that it will be useful,
        !            13: but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            14: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            15: GNU General Public License for more details.
        !            16: 
        !            17: You should have received a copy of the GNU General Public License
        !            18: along with GNU Emacs; see the file COPYING.  If not, write to
        !            19: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
        !            20: 
        !            21: 
        !            22: /* The following three symbols give information on
        !            23:  the size of various data types.  */
        !            24: 
        !            25: #define SHORTBITS 16           /* Number of bits in a short */
        !            26: 
        !            27: #define INTBITS 32             /* Number of bits in an int */
        !            28: 
        !            29: #define LONGBITS 32            /* Number of bits in a long */
        !            30: 
        !            31: /* Define BIG_ENDIAN iff lowest-numbered byte in a word
        !            32:    is the most significant byte.  */
        !            33: /* ns16000 is not big-endian: lowest numbered byte is least significant. */
        !            34: #undef BIG_ENDIAN
        !            35: 
        !            36: /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
        !            37:  * group of arguments and treat it as an array of the arguments.  */
        !            38: /* ns16000 call sequence used on mg1 means that &arg = the args as an array */
        !            39: #undef NO_ARG_ARRAY
        !            40: 
        !            41: /* Define WORD_MACHINE if addresses and such have
        !            42:  * to be corrected before they can be used as byte counts.  */
        !            43: /* ns16000 addresses are byte addresses */
        !            44: #undef WORD_MACHINE
        !            45: 
        !            46: /* Define how to take a char and sign-extend into an int.
        !            47:    On machines where char is signed, this is a no-op.  */
        !            48: 
        !            49: #define SIGN_EXTEND_CHAR(c) (c)
        !            50: 
        !            51: /* Now define a symbol for the cpu type, if your compiler
        !            52:    does not define it automatically:
        !            53:    vax, m68000, ns16000, pyramid, orion, tahoe and APOLLO
        !            54:    are the ones defined so far.  */
        !            55: /* Say this machine is a 16000 and an mg1, cpp says its a 32000 */
        !            56: #define ns16000
        !            57: #define mg1
        !            58: 
        !            59: /* Use type int rather than a union, to represent Lisp_Object */
        !            60: /* This is desirable for most machines.  */
        !            61: /* Not sure on mg-1 but this shouldn't hurt! */
        !            62: #define NO_UNION_TYPE
        !            63: 
        !            64: /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
        !            65:    the 24-bit bit field into an int.  In other words, if bit fields
        !            66:    are always unsigned.
        !            67: 
        !            68:    If you use NO_UNION_TYPE, this flag does not matter.  */
        !            69: 
        !            70: #define EXPLICIT_SIGN_EXTEND
        !            71: 
        !            72: /* Data type of load average, as read out of kmem.  */
        !            73: /* mg1 its an unsigned long */
        !            74: #define LOAD_AVE_TYPE unsigned long
        !            75: 
        !            76: /* Convert that into an integer that is 100 for a load average of 1.0  */
        !            77: #define        FSCALE  1000.0
        !            78: #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
        !            79: 
        !            80: /* Define CANNOT_DUMP on machines where unexec does not work.
        !            81:    Then the function dump-emacs will not be defined
        !            82:    and temacs will do (load "loadup") automatically unless told otherwise.  */
        !            83: /* ns16000's have an unexec, so should the mg-1 */
        !            84: #undef CANNOT_DUMP
        !            85: 
        !            86: /* Define VIRT_ADDR_VARIES if the virtual addresses of
        !            87:    pure and impure space as loaded can vary, and even their
        !            88:    relative order cannot be relied on.
        !            89: 
        !            90:    Otherwise Emacs assumes that text space precedes data space,
        !            91:    numerically.  */
        !            92: /* hmmmm... not sure.  copied m-sequent.h */
        !            93: #undef VIRT_ADDR_VARIES
        !            94: 
        !            95: /* Define C_ALLOCA if this machine does not support a true alloca
        !            96:    and the one written in C should be used instead.
        !            97:    Define HAVE_ALLOCA to say that the system provides a properly
        !            98:    working alloca function and it should be used.
        !            99:    Define neither one if an assembler-language alloca
        !           100:    in the file alloca.s should be used.  */
        !           101: /* hmmmm... again not sure.  so copied m-sequent.h again! */
        !           102: #undef C_ALLOCA
        !           103: #undef HAVE_ALLOCA
        !           104: 
        !           105: /* Define NO_REMAP if memory segmentation makes it not work well
        !           106:    to change the boundary between the text section and data section
        !           107:    when Emacs is dumped.  If you define this, the preloaded Lisp
        !           108:    code will not be sharable; but that's better than failing completely.  */
        !           109: /* mapping seems screwy */
        !           110: #define NO_REMAP
        !           111: 
        !           112: /* Avoids a compiler bug */
        !           113: /* borrowed from m-sequent.h */

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