Mercurial > hg > xemacs-beta

comparison src/m/acorn.h @ 0:376386a54a3c r19-14

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Import from CVS: tag r19-14
author cvs
date Mon, 13 Aug 2007 08:45:50 +0200
parents
children 0132846995bd
comparison
equal deleted inserted replaced
-1:000000000000 0:376386a54a3c
1 /* Machine description file for Acorn RISCiX machines.
2 Copyright (C) 1994 Free Software Foundation, Inc.
3
4 This file is part of GNU Emacs.
5
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)
9 any later version.
10
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.
15
16 You should have received a copy of the GNU General Public License
17 along with XEmacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
20
21 /* Synched up with: FSF 19.31. */
22
23 /* Define WORD_MACHINE if addresses and such have
24 * to be corrected before they can be used as byte counts. */
25
26 #undef WORD_MACHINE
27
28 /* Define how to take a char and sign-extend into an int.
29 On machines where char is signed, this is a no-op. */
30
31 /* ARM note - The RISCiX Norcroft C Compiler has ALL
32 non-32-bit types as unsigned */
33
34 #define SIGN_EXTEND_CHAR(c) (((int)(c) << 24) >> 24)
35
36 /* Now define a symbol for the cpu type, if your compiler
37 does not define it automatically:
38 Ones defined so far include vax, m68000, ns16000, pyramid,
39 orion, tahoe, APOLLO and many others */
40
41 /* ARM note - this is done by the Norcroft compiler - symbol is `__arm' */
42
43 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
44 the bit field into an int. In other words, if bit fields
45 are always unsigned.
46
47 If you use NO_UNION_TYPE, this flag does not matter. */
48
49 #define EXPLICIT_SIGN_EXTEND
50
51 #ifdef LDAV_SYMBOL
52 #undef LDAV_SYMBOL
53 #endif
54
55 #define LDAV_SYMBOL "_iavenrun"
56
57
58 /* Data type of load average, as read out of kmem. */
59
60 #define LOAD_AVE_TYPE long
61
62 /* Convert that into an integer that is 100 for a load average of 1.0 */
63
64 /*
65 * Scale factor for scaled integers used to count
66 * %cpu time and load averages.
67 */
68
69 /* FSHIFT and FSCALE are defined in param.h, but are required by
70 LOAD_AVE_CVT, so they need to be defined here. */
71
72 #ifndef FSHIFT
73 #define FSHIFT 8 /* bits to right of fixed binary point */
74 #endif
75
76 #ifndef FSCALE
77 #define FSCALE (1<<FSHIFT)
78 #endif
79
80 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
81
82 /* Define CANNOT_DUMP on machines where unexec does not work.
83 Then the function dump-emacs will not be defined
84 and temacs will do (load "loadup") automatically unless told otherwise. */
85
86 #undef CANNOT_DUMP
87
88 /* Define VIRT_ADDR_VARIES if the virtual addresses of
89 pure and impure space as loaded can vary, and even their
90 relative order cannot be relied on.
91
92 Otherwise Emacs assumes that text space precedes data space,
93 numerically. */
94
95 #undef VIRT_ADDR_VARIES
96
97 /* This prevents Emacs dumping an unsqueezed binary with the
98 SQUEEZE bit set in the magic number. */
99
100 #define ADJUST_EXEC_HEADER {hdr.a_magic &= ~MF_SQUEEZED;}
101
102 /* Define C_ALLOCA if this machine does not support a true alloca
103 and the one written in C should be used instead.
104 Define HAVE_ALLOCA to say that the system provides a properly
105 working alloca function and it should be used.
106 Define neither one if an assembler-language alloca
107 in the file alloca.s should be used. */
108
109 #ifdef __GNUC__
110
111 /* Use builtin alloca. Also be sure that no other ones are tried out. */
112 #define alloca __builtin_alloca
113 #define HAVE_ALLOCA
114
115 /* Keep gcc/RISCiX happy - it uses __gccmain where other versions of
116 gcc use __main, because of a library routine name clash. */
117 #define __main __gccmain
118
119 #else
120 #define C_ALLOCA
121 #undef HAVE_ALLOCA
122 #endif /* __GNUC__ */
123
124 /* Define NO_REMAP if memory segmentation makes it not work well
125 to change the boundary between the text section and data section
126 when Emacs is dumped. If you define this, the preloaded Lisp
127 code will not be sharable; but that's better than failing completely. */
128
129 #define NO_REMAP
130
131
132 #ifndef NOT_C_CODE
133 #define TEXT_START 0x8000
134 #define DATA_END &_edata
135 extern int _edata;
136 #define etext _etext
137 #endif
138
139 /* Avoid debugging library */
140 #define LIBS_DEBUG
141
142 /* Avoid sharing libc */
143 #define LIB_STANDARD -lc_n
144
145 /* Avoid sharing libX11 */
146 #define LIB_X11_LIB -lX11_n
147
148 /* All kinds of symbol definitions, so as to avoid multiply defined symbol
149 errors from the RISCiX linker. */
150
151 #ifdef __GNUC__
152 #define C_DEBUG_SWITCH
153
154 #define C_OPTIMIZE_SWITCH -O1 -fomit-frame-pointer -w -g -Dgetopt=gnu_getopt -Dopterr=gnu_opterr -Doptind=gnu_optind -Doptarg=gnu_optarg -Dcfree=gnu_cfree -D___type=
155
156 #else
157 #define C_DEBUG_SWITCH -O -w -g -Dgetopt=gnu_getopt -Dopterr=gnu_opterr -Doptind=gnu_optind -Doptarg=gnu_optarg -Dcfree=gnu_cfree
158 #endif
159
160 /* Turn this on to avoid the emacs malloc and use standard one */
161
162 #undef SYSTEM_MALLOC
163
164 /* For the portable alloca */
165 #define STACK_DIRECTION -1
166
167 #ifdef NO_REMAP
168 /* CRT0_O is defined in s/riscix1-1.h or s/riscix1-2.h, as appropriate. */
169 #define START_FILES pre-crt0.o CRT0_O
170 #else
171 Cannot
172 do
173 this
174 yet
175 #endif