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authorRichard M. Stallman1995-10-31 08:44:46 +0000
committerRichard M. Stallman1995-10-31 08:44:46 +0000
commit0dc7e4aa40f3cde6b72d6240f32a66dcf2cff0ba (patch)
tree2bbf3f81cb3b0df49f679123284d279572f35ed5 /src
parente1fd57e30e4612c0688d8acd8af76290b85d6e36 (diff)
downloademacs-0dc7e4aa40f3cde6b72d6240f32a66dcf2cff0ba.tar.gz
emacs-0dc7e4aa40f3cde6b72d6240f32a66dcf2cff0ba.zip
Initial revision
Diffstat (limited to 'src')
-rw-r--r--src/m/m68k.h88
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diff --git a/src/m/m68k.h b/src/m/m68k.h
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1/* Machine description file for generic Motorola 68k.
2 Copyright (C) 1985, 1995 Free Software Foundation, Inc.
3
4This file is part of GNU Emacs.
5
6GNU Emacs is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
8the Free Software Foundation; either version 2, or (at your option)
9any later version.
10
11GNU Emacs is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14GNU General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with GNU Emacs; see the file COPYING. If not, write to
18the 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
25/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
26 is the most significant byte. */
27
28#define WORDS_BIG_ENDIAN
29
30/* Define NO_ARG_ARRAY if you cannot take the address of the first of a
31 * group of arguments and treat it as an array of the arguments. */
32
33/* #define NO_ARG_ARRAY */
34
35/* Define WORD_MACHINE if addresses and such have
36 * to be corrected before they can be used as byte counts. */
37
38/* #define WORD_MACHINE */
39
40/* Now define a symbol for the cpu type, if your compiler
41 does not define it automatically. */
42
43#ifndef m68k
44#define m68k
45#endif
46
47/* Use type int rather than a union, to represent Lisp_Object */
48/* This is desirable for most machines. */
49
50#define NO_UNION_TYPE
51
52/* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
53 the 24-bit bit field into an int. In other words, if bit fields
54 are always unsigned.
55
56 If you use NO_UNION_TYPE, this flag does not matter. */
57
58#define EXPLICIT_SIGN_EXTEND
59
60/* Define CANNOT_DUMP on machines where unexec does not work.
61 Then the function dump-emacs will not be defined
62 and temacs will do (load "loadup") automatically unless told otherwise. */
63
64/* #define CANNOT_DUMP */
65
66/* Define VIRT_ADDR_VARIES if the virtual addresses of
67 pure and impure space as loaded can vary, and even their
68 relative order cannot be relied on.
69
70 Otherwise Emacs assumes that text space precedes data space,
71 numerically. */
72
73/* #define VIRT_ADDR_VARIES */
74
75#ifdef linux
76#ifdef __ELF__
77#define DATA_SEG_BITS 0x80000000
78#endif
79
80#define NO_REMAP
81#define TEXT_START 0
82#endif
83
84/* If compiling with GCC, let GCC implement alloca. */
85#if defined(__GNUC__) && !defined(alloca)
86#define alloca(n) __builtin_alloca(n)
87#define HAVE_ALLOCA
88#endif