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Diffstat (limited to 'src/m-intel386.h')
| -rw-r--r-- | src/m-intel386.h | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/src/m-intel386.h b/src/m-intel386.h new file mode 100644 index 00000000000..62f795bb596 --- /dev/null +++ b/src/m-intel386.h @@ -0,0 +1,184 @@ +/* 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 |