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- /* m- file for intel 386.
- Copyright (C) 1987 Free Software Foundation, Inc.
-
- This file is part of GNU Emacs.
-
- GNU Emacs is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 1, or (at your option)
- any later version.
-
- GNU Emacs is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU Emacs; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-
- /* The following three symbols give information on
- the size of various data types. */
-
- #define SHORTBITS 16 /* Number of bits in a short */
-
- #define INTBITS 32 /* Number of bits in an int */
-
- #define LONGBITS 32 /* Number of bits in a long */
-
- /* i386 is not big-endian: lowest numbered byte is least significant. */
-
- /* #undef BIG_ENDIAN */
-
- /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
- * group of arguments and treat it as an array of the arguments. */
-
- /* #define NO_ARG_ARRAY */
-
- /* Define WORD_MACHINE if addresses and such have
- * to be corrected before they can be used as byte counts. */
-
- /* #define WORD_MACHINE */
-
- /* Define how to take a char and sign-extend into an int.
- On machines where char is signed, this is a no-op. */
-
- #define SIGN_EXTEND_CHAR(c) (c)
-
- /* Now define a symbol for the cpu type, if your compiler
- does not define it automatically:
- Ones defined so far include vax, m68000, ns16000, pyramid,
- orion, tahoe, APOLLO and many others */
-
- #define INTEL386
-
- /* Use type int rather than a union, to represent Lisp_Object */
-
- #define NO_UNION_TYPE
-
- /* crt0.c, if it is used, should use the i386-bsd style of entry.
- with no extra dummy args. On USG and XENIX,
- NO_REMAP says this isn't used. */
-
- #define CRT0_DUMMIES bogus_fp,
-
- /* crt0.c should define a symbol `start' and do .globl with a dot. */
-
- #define DOT_GLOBAL_START
-
- #ifdef XENIX
- /* Data type of load average, as read out of kmem. */
- #define LOAD_AVE_TYPE short
-
- /* Convert that into an integer that is 100 for a load average of 1.0 */
- #define LOAD_AVE_CVT(x) (((double) (x)) * 100.0 / FSCALE)
-
- #define FSCALE 256.0 /* determined by experimentation... */
- #endif
-
- #ifdef USG5_4 /* Older USG systems do not support the load average. */
- /* Data type of load average, as read out of kmem. */
-
- #define LOAD_AVE_TYPE long
-
- /* Convert that into an integer that is 100 for a load average of 1.0 */
- /* This is totally uncalibrated. */
-
- #define LOAD_AVE_CVT(x) ((int) (((double) (x)) * 100.0 / FSCALE))
- #define FSCALE 256.0
- #endif
-
- #ifdef J386BSD
- /* Data type of load average, as read out of kmem. */
-
- #define LOAD_AVE_TYPE unsigned long
-
- /* Convert that into an integer that is 100 for a load average of 1.0. */
- #define LOAD_AVE_CVT(x) ((int) (((double) (x)) * 100.0 / FSCALE))
-
- #endif /* J386BSD */
-
- /* Define CANNOT_DUMP on machines where unexec does not work.
- Then the function dump-emacs will not be defined
- and temacs will do (load "loadup") automatically unless told otherwise. */
-
- /* #define CANNOT_DUMP */
-
- /* Define VIRT_ADDR_VARIES if the virtual addresses of
- pure and impure space as loaded can vary, and even their
- relative order cannot be relied on.
-
- Otherwise Emacs assumes that text space precedes data space,
- numerically. */
-
- /* #define VIRT_ADDR_VARIES */
-
- #ifdef XENIX
- #define VALBITS 26
- #define GCTYPEBITS 5
-
- /* Define NO_REMAP if memory segmentation makes it not work well
- to change the boundary between the text section and data section
- when Emacs is dumped. If you define this, the preloaded Lisp
- code will not be sharable; but that's better than failing completely. */
-
- #define NO_REMAP
-
- #define STACK_DIRECTION -1
-
- /* Since cannot purify, use standard Xenix 386 startup code. */
-
- #define START_FILES /lib/386/Sseg.o pre-crt0.o /lib/386/Scrt0.o
-
- /* These really use terminfo. */
-
- #define LIBS_TERMCAP /lib/386/Slibcurses.a \
- /lib/386/Slibtinfo.a /lib/386/Slibx.a
-
- /* Standard libraries for this machine. Since `-l' doesn't work in `ld'. */
- /* '__fltused' is unresolved w/o Slibcfp.a */
- #define LIB_STANDARD /lib/386/Slibcfp.a /lib/386/Slibc.a
- #else /* not XENIX */
-
- #ifdef USG
- #ifdef USG5_4
- #define C_ALLOCA
- #endif /* USG5_4 */
- #ifndef LIB_STANDARD
- #if defined (__GNUC__) || defined (C_ALLOCA)
- #define LIB_STANDARD -lc
- #else
- #define LIB_STANDARD -lPW -lc
- #endif
- #endif /* no LIB_STANDARD */
- #ifndef C_ALLOCA
- #define HAVE_ALLOCA
- #endif
- #define NO_REMAP
- #define TEXT_START 0
- #endif /* USG */
- #endif /* not XENIX */
-
- #ifdef BSD
- #define HAVE_ALLOCA
- #endif /* BSD */
-
- /* If compiling with GCC, let GCC implement alloca. */
- #if defined(__GNUC__) && !defined(alloca)
- #define alloca(n) __builtin_alloca(n)
- #define HAVE_ALLOCA
- #endif
-
- #ifdef USG
- #ifdef __STDC__
- #ifndef DONT_DEFINE_SIGNAL
- /* Cast the function argument to avoid warnings. */
- #define signal(sig, func) (signal (sig, (void (*) (int)) (func)))
- #endif
- #endif
- #endif
-
- #ifdef USG5_4
- #define DATA_SEG_BITS 0x08000000
- #endif
-