1 /* machine description file for clipper
2 Copyright (C) 1985, 1986 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
21 /* The following three symbols give information on
22 the size of various data types. */
24 #define SHORTBITS 16 /* Number of bits in a short */
26 #define INTBITS 32 /* Number of bits in an int */
28 #define LONGBITS 32 /* Number of bits in a long */
30 /* Define BIG_ENDIAN iff lowest-numbered byte in a word
31 is the most significant byte. */
33 /* #define BIG_ENDIAN */
35 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
36 * group of arguments and treat it as an array of the arguments. */
40 /* Define WORD_MACHINE if addresses and such have
41 * to be corrected before they can be used as byte counts. */
43 /* #define WORD_MACHINE */
45 /* Now define a symbol for the cpu type, if your compiler
46 does not define it automatically */
50 /* Use type int rather than a union, to represent Lisp_Object */
54 /* crt0.c should define a symbol `start' and do .globl with a dot. */
56 #define DOT_GLOBAL_START
58 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
59 the 24-bit bit field into an int. In other words, if bit fields
62 If you use NO_UNION_TYPE, this flag does not matter. */
64 /* #define EXPLICIT_SIGN_EXTEND */
66 /* USG systems I know of running on Vaxes do not actually
67 support the load average, so disable it for them. */
69 /* Data type of load average, as read out of kmem. */
71 #define LOAD_AVE_TYPE double
73 /* Convert that into an integer that is 100 for a load average of 1.0 */
75 #define LOAD_AVE_CVT(x) ((int) ((x) * 100.0))
77 /* Define CANNOT_DUMP on machines where unexec does not work.
78 Then the function dump-emacs will not be defined
79 and temacs will do (load "loadup") automatically unless told otherwise. */
80 /* #define CANNOT_DUMP */
82 /* Define VIRT_ADDR_VARIES if the virtual addresses of
83 pure and impure space as loaded can vary, and even their
84 relative order cannot be relied on.
86 Otherwise Emacs assumes that text space precedes data space,
89 /* #define VIRT_ADDR_VARIES */ /* Karl Kleinpaste says this isn't needed. */
91 /* Define C_ALLOCA if this machine does not support a true alloca
92 and the one written in C should be used instead.
93 Define HAVE_ALLOCA to say that the system provides a properly
94 working alloca function and it should be used.
95 Define neither one if an assembler-language alloca
96 in the file alloca.s should be used. */
100 /* Define NO_REMAP if memory segmentation makes it not work well
101 to change the boundary between the text section and data section
102 when Emacs is dumped. If you define this, the preloaded Lisp
103 code will not be sharable; but that's better than failing completely. */
105 /* #define NO_REMAP */
111 #define LD_TEXT_START_ADDR 8000