1 /* Machine description file for generic Motorola 68k.
2 Copyright (C) 1985, 1995, 2001, 2002, 2003, 2004,
3 2005, 2006, 2007 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, USA. */
23 /* The following three symbols give information on
24 the size of various data types. */
27 /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
28 is the most significant byte. */
30 #define WORDS_BIG_ENDIAN
32 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
33 * group of arguments and treat it as an array of the arguments. */
35 /* #define NO_ARG_ARRAY */
37 /* Define WORD_MACHINE if addresses and such have
38 * to be corrected before they can be used as byte counts. */
40 /* #define WORD_MACHINE */
42 /* Now define a symbol for the cpu type, if your compiler
43 does not define it automatically. */
49 /* Use type int rather than a union, to represent Lisp_Object */
50 /* This is desirable for most machines. */
54 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
55 the 24-bit bit field into an int. In other words, if bit fields
58 If you use NO_UNION_TYPE, this flag does not matter. */
60 #define EXPLICIT_SIGN_EXTEND
62 /* Define CANNOT_DUMP on machines where unexec does not work.
63 Then the function dump-emacs will not be defined
64 and temacs will do (load "loadup") automatically unless told otherwise. */
66 /* #define CANNOT_DUMP */
68 /* Define VIRT_ADDR_VARIES if the virtual addresses of
69 pure and impure space as loaded can vary, and even their
70 relative order cannot be relied on.
72 Otherwise Emacs assumes that text space precedes data space,
75 /* #define VIRT_ADDR_VARIES */
79 #define DATA_SEG_BITS 0x80000000
86 /* arch-tag: 4eadd161-b4e8-4b82-82a1-e4ce7f42969d
87 (do not change this comment) */