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

1.1     ! root        1: /* RTPC machine dependent defines 
        !             2:    Copyright (C) 1986 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) ((signed char)(c))
        !            49: 
        !            50: /* Now define a symbol for the cpu type, if your compiler
        !            51:    does not define it automatically.  */
        !            52: 
        !            53: #define ibmrt
        !            54: #define romp /* unfortunately old include files are hanging around.  */
        !            55: 
        !            56: /* Use type int rather than a union, to represent Lisp_Object */
        !            57: /* This is desirable for most machines.  */
        !            58: 
        !            59: #define NO_UNION_TYPE
        !            60: 
        !            61: /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
        !            62:    the 24-bit bit field into an int.  In other words, if bit fields
        !            63:    are always unsigned.
        !            64: 
        !            65:    If you use NO_UNION_TYPE, this flag does not matter.  */
        !            66: 
        !            67: #define EXPLICIT_SIGN_EXTEND
        !            68: 
        !            69: /* Data type of load average, as read out of kmem.  */
        !            70: 
        !            71: #define LOAD_AVE_TYPE double   /* For AIS (sysV) */
        !            72: 
        !            73: /* Convert that into an integer that is 100 for a load average of 1.0  */
        !            74: 
        !            75: #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0)
        !            76: 
        !            77: /* Define CANNOT_DUMP on machines where unexec does not work.
        !            78:    Then the function dump-emacs will not be defined
        !            79:    and temacs will do (load "loadup") automatically unless told otherwise.  */
        !            80: 
        !            81: /* #define CANNOT_DUMP */
        !            82: 
        !            83: /* Define VIRT_ADDR_VARIES if the virtual addresses of
        !            84:    pure and impure space as loaded can vary, and even their
        !            85:    relative order cannot be relied on.
        !            86: 
        !            87:    Otherwise Emacs assumes that text space precedes data space,
        !            88:    numerically.  */
        !            89: 
        !            90: #undef VIRT_ADDR_VARIES
        !            91: 
        !            92: /* Define C_ALLOCA if this machine does not support a true alloca
        !            93:    and the one written in C should be used instead.
        !            94:    Define HAVE_ALLOCA to say that the system provides a properly
        !            95:    working alloca function and it should be used.
        !            96:    Define neither one if an assembler-language alloca
        !            97:    in the file alloca.s should be used.  */
        !            98: 
        !            99: #define HAVE_ALLOCA
        !           100: 
        !           101: /* The data segment in this machine starts at a fixed address.
        !           102:    An address of data cannot be stored correctly in a Lisp object;
        !           103:    we always lose the high bits.  We must tell XPNTR to add them back.  */
        !           104: 
        !           105: #define DATA_SEG_BITS 0x10000000
        !           106: #define DATA_START    0x10000000
        !           107: 
        !           108: /* The text segment always starts at a fixed address.
        !           109:    This way we don't need to have a label _start defined.  */
        !           110: #define TEXT_START 0
        !           111: 
        !           112: #define VALBITS 26
        !           113: #define GCTYPEBITS 5
        !           114: 
        !           115: /* Taking a pointer to a char casting it as int pointer */
        !           116: /* and then taking the int which the int pointer points to */
        !           117: /* is practically guaranteed to give erroneous results */
        !           118: 
        !           119: #define NEED_ERRNO
        !           120: 
        !           121: #define SKTPAIR
        !           122: 
        !           123: /* BSD has BSTRING.  */
        !           124: 
        !           125: #define BSTRING
        !           126: 
        !           127: /* Special switches to give the C compiler.  */
        !           128: 
        !           129: #define C_SWITCH_MACHINE -Dalloca=_Alloca
        !           130: 
        !           131: /* Don't attempt to relabel some of the data as text when dumping.
        !           132:    It does not work because their virtual addresses are not consecutive.
        !           133:    This enables us to use the standard crt0.o.  */
        !           134: 
        !           135: #define NO_REMAP

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