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Annotation of GNUtools/emacs/src/m-intel386.h, revision 1.1

1.1     ! root        1: /* m- file for intel 386.
        !             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: /* i386 is not big-endian: lowest numbered byte is least significant. */
        !            31: 
        !            32: /* #undef BIG_ENDIAN */
        !            33: 
        !            34: /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
        !            35:  * group of arguments and treat it as an array of the arguments.  */
        !            36: 
        !            37: /* #define NO_ARG_ARRAY */
        !            38: 
        !            39: /* Define WORD_MACHINE if addresses and such have
        !            40:  * to be corrected before they can be used as byte counts.  */
        !            41: 
        !            42: /* #define WORD_MACHINE */
        !            43: 
        !            44: /* Define how to take a char and sign-extend into an int.
        !            45:    On machines where char is signed, this is a no-op.  */
        !            46: 
        !            47: #define SIGN_EXTEND_CHAR(c) (c)
        !            48: 
        !            49: /* Now define a symbol for the cpu type, if your compiler
        !            50:    does not define it automatically:
        !            51:    Ones defined so far include vax, m68000, ns16000, pyramid,
        !            52:    orion, tahoe, APOLLO and many others */
        !            53: 
        !            54: #define INTEL386
        !            55: 
        !            56: /* Use type int rather than a union, to represent Lisp_Object */
        !            57: 
        !            58: #define NO_UNION_TYPE
        !            59: 
        !            60: /* crt0.c, if it is used, should use the i386-bsd style of entry.
        !            61:    with no extra dummy args.  On USG and XENIX,
        !            62:    NO_REMAP says this isn't used. */
        !            63: 
        !            64: #define CRT0_DUMMIES bogus_fp,
        !            65: 
        !            66: /* crt0.c should define a symbol `start' and do .globl with a dot.  */
        !            67: 
        !            68: #define DOT_GLOBAL_START
        !            69: 
        !            70: #ifdef XENIX
        !            71: /* Data type of load average, as read out of kmem.  */
        !            72: #define LOAD_AVE_TYPE short
        !            73: 
        !            74: /* Convert that into an integer that is 100 for a load average of 1.0  */
        !            75: #define LOAD_AVE_CVT(x) (((double) (x)) * 100.0 / FSCALE)
        !            76:   
        !            77: #define FSCALE 256.0         /* determined by experimentation...  */
        !            78: #endif
        !            79: 
        !            80: #ifdef USG5_4 /* Older USG systems do not support the load average.  */
        !            81: /* Data type of load average, as read out of kmem.  */
        !            82: 
        !            83: #define LOAD_AVE_TYPE long
        !            84: 
        !            85: /* Convert that into an integer that is 100 for a load average of 1.0  */
        !            86: /* This is totally uncalibrated. */
        !            87: 
        !            88: #define LOAD_AVE_CVT(x) ((int) (((double) (x)) * 100.0 / FSCALE))
        !            89: #define FSCALE 256.0
        !            90: #endif
        !            91: 
        !            92: #ifdef J386BSD 
        !            93: /* Data type of load average, as read out of kmem.  */
        !            94: 
        !            95: #define LOAD_AVE_TYPE unsigned long
        !            96: 
        !            97: /* Convert that into an integer that is 100 for a load average of 1.0.  */
        !            98: #define LOAD_AVE_CVT(x) ((int) (((double) (x)) * 100.0 / FSCALE))
        !            99: 
        !           100: #endif /* J386BSD */
        !           101: 
        !           102: /* Define CANNOT_DUMP on machines where unexec does not work.
        !           103:    Then the function dump-emacs will not be defined
        !           104:    and temacs will do (load "loadup") automatically unless told otherwise.  */
        !           105: 
        !           106: /* #define CANNOT_DUMP */
        !           107: 
        !           108: /* Define VIRT_ADDR_VARIES if the virtual addresses of
        !           109:    pure and impure space as loaded can vary, and even their
        !           110:    relative order cannot be relied on.
        !           111: 
        !           112:    Otherwise Emacs assumes that text space precedes data space,
        !           113:    numerically.  */
        !           114: 
        !           115: /* #define VIRT_ADDR_VARIES */
        !           116: 
        !           117: #ifdef XENIX
        !           118: #define VALBITS 26
        !           119: #define GCTYPEBITS 5
        !           120: 
        !           121: /* Define NO_REMAP if memory segmentation makes it not work well
        !           122:    to change the boundary between the text section and data section
        !           123:    when Emacs is dumped.  If you define this, the preloaded Lisp
        !           124:    code will not be sharable; but that's better than failing completely.  */
        !           125: 
        !           126: #define NO_REMAP
        !           127: 
        !           128: #define STACK_DIRECTION -1
        !           129: 
        !           130: /* Since cannot purify, use standard Xenix 386 startup code. */
        !           131: 
        !           132: #define START_FILES    /lib/386/Sseg.o pre-crt0.o /lib/386/Scrt0.o
        !           133: 
        !           134: /* These really use terminfo.  */
        !           135: 
        !           136: #define LIBS_TERMCAP /lib/386/Slibcurses.a  \
        !           137:    /lib/386/Slibtinfo.a /lib/386/Slibx.a
        !           138: 
        !           139: /* Standard libraries for this machine.  Since `-l' doesn't work in `ld'.  */
        !           140: /* '__fltused' is unresolved w/o Slibcfp.a */
        !           141: #define LIB_STANDARD /lib/386/Slibcfp.a /lib/386/Slibc.a
        !           142: #else /* not XENIX */
        !           143: 
        !           144: #ifdef USG
        !           145: #ifdef USG5_4
        !           146: #define C_ALLOCA
        !           147: #endif /* USG5_4 */
        !           148: #ifndef LIB_STANDARD
        !           149: #if defined (__GNUC__) || defined (C_ALLOCA)
        !           150: #define        LIB_STANDARD -lc
        !           151: #else
        !           152: #define LIB_STANDARD -lPW -lc
        !           153: #endif
        !           154: #endif /* no LIB_STANDARD */
        !           155: #ifndef C_ALLOCA
        !           156: #define HAVE_ALLOCA
        !           157: #endif
        !           158: #define NO_REMAP 
        !           159: #define TEXT_START 0
        !           160: #endif /* USG */
        !           161: #endif /* not XENIX */
        !           162: 
        !           163: #ifdef BSD
        !           164: #define HAVE_ALLOCA
        !           165: #endif /* BSD */
        !           166: 
        !           167: /* If compiling with GCC, let GCC implement alloca.  */
        !           168: #if defined(__GNUC__) && !defined(alloca)
        !           169: #define alloca(n) __builtin_alloca(n)
        !           170: #define HAVE_ALLOCA
        !           171: #endif
        !           172: 
        !           173: #ifdef USG
        !           174: #ifdef __STDC__
        !           175: #ifndef DONT_DEFINE_SIGNAL
        !           176: /* Cast the function argument to avoid warnings.  */
        !           177: #define signal(sig, func) (signal (sig, (void (*) (int)) (func)))
        !           178: #endif
        !           179: #endif
        !           180: #endif
        !           181: 
        !           182: #ifdef USG5_4
        !           183: #define DATA_SEG_BITS 0x08000000
        !           184: #endif

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