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/* machine description file for ISI 68000's
Copyright (C) 1985, 1986, 2001, 2002, 2003, 2004,
2005, 2006, 2007, 2008 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 3, 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, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA. */
/* The following line tells the configuration script what sort of
operating system this machine is likely to run.
USUAL-OPSYS="note"
NOTE-START
Use `-opsystem=bsd4-2' or `-opsystem=bsd4-3'.
NOTE-END */
#define ISI68K
/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
is the most significant byte. */
#define WORDS_BIG_ENDIAN
/* Say this machine is a 68000 */
#define m68000
/* Use type int rather than a union, to represent Lisp_Object */
#define NO_UNION_TYPE
/* XINT must explicitly sign-extend */
#define EXPLICIT_SIGN_EXTEND
/* Data type of load average, as read out of kmem. */
#ifdef BSD4_3
#define LOAD_AVE_TYPE long
#else
#define LOAD_AVE_TYPE double
#endif BSD4_3
/* Convert that into an integer that is 100 for a load average of 1.0 */
#ifdef BSD4_3
#define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
#else
#define LOAD_AVE_CVT(x) ((int) ((x) * 100.0))
#endif
/* Mask for address bits within a memory segment */
#define SEGMENT_MASK 0x1ffff
/* use the -20 switch to get the 68020 code */
/* #define C_SWITCH_MACHINE -20 */
/* Use the version of the library for the 68020
because the standard library requires some special hacks in crt0
which the GNU crt0 does not have. */
#define LIB_STANDARD -lmc
/* macros to make unexec work right */
#define A_TEXT_OFFSET(HDR) sizeof(HDR)
#define A_TEXT_SEEK(HDR) sizeof(HDR)
/* A few changes for the newer systems. */
#ifdef BSD4_3
/* The following line affects crt0.c. */
#undef m68k
#undef LIB_STANDARD
#define LIB_STANDARD -lmc -lc
#define C_DEBUG_SWITCH -20 -O -X23
#endif
/* arch-tag: 3bfb5a11-d94e-4372-923b-9f47d0851f42
(do not change this comment) */
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