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Annotation of GNUtools/emacs/src/m-iris4d.h, revision 1.1

1.1     ! root        1: /* m- file for Iris-4D machines.  Use with s-irix3-3.h.
        !             2:    Copyright (C) 1987 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: #undef 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:    Ones defined so far include vax, m68000, ns16000, pyramid,
        !            53:    orion, tahoe, APOLLO and many others */
        !            54: 
        !            55: #ifndef mips
        !            56: #define mips
        !            57: #endif
        !            58: 
        !            59: #ifndef IRIS_4D
        !            60: #define IRIS_4D
        !            61: #endif
        !            62: 
        !            63: /* Use type int rather than a union, to represent Lisp_Object */
        !            64: /* This is desirable for most machines.  */
        !            65: 
        !            66: #define NO_UNION_TYPE
        !            67: 
        !            68: /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
        !            69:    the 24-bit bit field into an int.  In other words, if bit fields
        !            70:    are always unsigned.
        !            71: 
        !            72:    If you use NO_UNION_TYPE, this flag does not matter.  */
        !            73: 
        !            74: #define EXPLICIT_SIGN_EXTEND
        !            75: 
        !            76: /* Data type of load average, as read out of kmem.  */
        !            77: 
        !            78: #define LOAD_AVE_TYPE long     /* This doesn't quite work on the 4D */
        !            79: 
        !            80: /* Convert that into an integer that is 100 for a load average of 1.0  */
        !            81: 
        !            82: #define LOAD_AVE_CVT(x) (int)(((double)(x)*100)/1024.0)
        !            83: 
        !            84: #undef KERNEL_FILE
        !            85: #define KERNEL_FILE "/unix"
        !            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: #undef 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: 
        !           112: /* Define NO_REMAP if memory segmentation makes it not work well
        !           113:    to change the boundary between the text section and data section
        !           114:    when Emacs is dumped.  If you define this, the preloaded Lisp
        !           115:    code will not be sharable; but that's better than failing completely.  */
        !           116: 
        !           117: #define NO_REMAP
        !           118: 
        !           119: /* This machine requires completely different unexec code
        !           120:    which lives in a separate file.  Specify the file name.  */
        !           121: 
        !           122: #define UNEXEC unexmips.o
        !           123: 
        !           124: #define TEXT_START 0x400000
        !           125: 
        !           126: /*
        !           127:  * DATA_SEG_BITS forces that bit to be or'd in with any pointers which
        !           128:  * are trying to access pure strings (as gnu-emacs only allows 24 bits
        !           129:  * for the value field of a LISP_OBJECT).
        !           130:  */
        !           131: 
        !           132: #define DATA_START 0x10000000
        !           133: #define DATA_SEG_BITS  0x10000000
        !           134: 
        !           135: #undef LIBS_MACHINE
        !           136: /* -lsun in case using Yellow Pages for passwords.  */
        !           137: #define LIBS_MACHINE -lsun -lmld
        !           138: #define LIBS_DEBUG
        !           139: 
        !           140: /* Define this if you have a fairly recent system,
        !           141:    in which crt1.o and crt1.n should be used.  */
        !           142: #define HAVE_CRTN
        !           143: 
        !           144: #ifdef HAVE_CRTN
        !           145: /* Must define START-FILES so that the linker can find /usr/lib/crt0.o.  */
        !           146: #define START_FILES pre-crt0.o /usr/lib/crt1.o
        !           147: #define LIB_STANDARD -lbsd -lc /usr/lib/crtn.o
        !           148: #else
        !           149: #define START_FILES pre-crt0.o /usr/lib/crt0.o
        !           150: /* The entry-point label (start of text segment) is `start', not `__start'.  */
        !           151: #define DEFAULT_ENTRY_ADDRESS start
        !           152: #define LIB_STANDARD -lbsd -lc
        !           153: #endif
        !           154: 
        !           155: /* Use terminfo instead of termcap.  */
        !           156: 
        !           157: #define TERMINFO
        !           158: 
        !           159: /* Letter to use in finding device name of first pty,
        !           160:   if system supports pty's.  'a' means it is /dev/ptya0  */
        !           161: 
        !           162: #undef FIRST_PTY_LETTER
        !           163: #define FIRST_PTY_LETTER 'q'
        !           164: 
        !           165: /* Define STACK_DIRECTION for alloca.c */
        !           166: 
        !           167: #define STACK_DIRECTION -1
        !           168: 
        !           169: /* The standard definitions of these macros would work ok,
        !           170:    but these are faster because the constants are short.  */
        !           171: 
        !           172: #define XUINT(a) (((unsigned)(a) << (INTBITS-VALBITS)) >> INTBITS-VALBITS)
        !           173: 
        !           174: #define XSET(var, type, ptr) \
        !           175:    ((var) = ((int)(type) << VALBITS) + (((unsigned) (ptr) << (INTBITS-VALBITS)) >> (INTBITS-VALBITS)))
        !           176: 
        !           177: #define XSETINT(a, b)  XSET(a, XTYPE(a), b)
        !           178: #define XSETUINT(a, b) XSET(a, XTYPE(a), b)
        !           179: #define XSETPNTR(a, b) XSET(a, XTYPE(a), b)
        !           180: 
        !           181: #define XMARKBIT(a) ((a) < 0)
        !           182: #define XSETMARKBIT(a,b) ((a) = ((a) & ~MARKBIT) | ((b) ? MARKBIT : 0))
        !           183: #define XUNMARK(a) ((a) = (((unsigned)(a) << (INTBITS-GCTYPEBITS-VALBITS)) >> (INTBITS-GCTYPEBITS-VALBITS)))
        !           184: 
        !           185: #if 0 /* This was a mistake.  It is needed only on irix 4.0,
        !           186:         but s-irix4-0.h already does it.  */
        !           187: /* Turn off some "helpful" error checks for type mismatches
        !           188:    that we can't fix without breaking other machines.  */
        !           189: #define C_SWITCH_MACHINE -cckr
        !           190: #endif

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