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comparison src/m/att3b.h @ 0:376386a54a3c r19-14

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Import from CVS: tag r19-14
author cvs
date Mon, 13 Aug 2007 08:45:50 +0200
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1 /* Machine-dependent configuration for GNU Emacs for AT&T 3b machines.
2 Copyright (C) 1986 Free Software Foundation, Inc.
3
4 Modified by David Robinson (daver@csvax.caltech.edu) 6/6/86
5
6 This file is part of GNU Emacs.
7
8 GNU Emacs is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
11 any later version.
12
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with XEmacs; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
22
23 /* Synched up with: FSF 19.31. */
24
25 /* The following line tells the configuration script what sort of
26 operating system this machine is likely to run.
27 USUAL-OPSYS="usg5-2-2" */
28
29 /* Define WORD_MACHINE if addresses and such have
30 * to be corrected before they can be used as byte counts. */
31
32 /* #define WORD_MACHINE */
33
34 /* Now define a symbol for the cpu type, if your compiler
35 does not define it automatically */
36 #define ATT3B
37
38 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
39 the bit field into an int. In other words, if bit fields
40 are always unsigned.
41
42 If you use NO_UNION_TYPE, this flag does not matter. */
43
44 #define EXPLICIT_SIGN_EXTEND
45
46 /* Data type of load average, as read out of kmem. */
47 /* #define LOAD_AVE_TYPE long */
48
49 /* Convert that into an integer that is 100 for a load average of 1.0 */
50
51 /* #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE) */
52
53 /* Define CANNOT_DUMP on machines where unexec does not work.
54 Then the function dump-emacs will not be defined
55 and temacs will do (load "loadup") automatically unless told otherwise. */
56 /* #define CANNOT_DUMP */
57
58 /* Define VIRT_ADDR_VARIES if the virtual addresses of
59 pure and impure space as loaded can vary, and even their
60 relative order cannot be relied on.
61
62 Otherwise Emacs assumes that text space precedes data space,
63 numerically. */
64
65 /* #define VIRT_ADDR_VARIES */ /* Karl Kleinpaste says this isn't needed. */
66
67 /* Define C_ALLOCA if this machine does not support a true alloca
68 and the one written in C should be used instead.
69 Define HAVE_ALLOCA to say that the system provides a properly
70 working alloca function and it should be used.
71 Define neither one if an assembler-language alloca
72 in the file alloca.s should be used. */
73
74 /* SysV has alloca in the PW library */
75
76 #define LIB_STANDARD -lPW -lc
77 #define HAVE_ALLOCA
78
79 /* Define NO_REMAP if memory segmentation makes it not work well
80 to change the boundary between the text section and data section
81 when Emacs is dumped. If you define this, the preloaded Lisp
82 code will not be sharable; but that's better than failing completely. */
83
84 #define NO_REMAP
85
86 /* #define LD_SWITCH_MACHINE -N */
87
88 /* Use Terminfo, not Termcap. */
89
90 #define TERMINFO
91
92 /* -O has been observed to make correct C code in Emacs not work.
93 So don't try to use it. */
94
95 #if u3b2 || u3b5 || u3b15
96 #define C_OPTIMIZE_SWITCH
97 #endif
98
99 /* Define our page size. */
100
101 #define NBPC 2048
102
103 /* The usual definition of XINT, which involves shifting, does not
104 sign-extend properly on this machine. */
105
106 #define XREALINT(i) (((sign_extend_temp=(i)) & 0x00800000) \
107 ? (sign_extend_temp | 0xFF000000) \
108 : (sign_extend_temp & 0x00FFFFFF))
109
110 #ifdef emacs /* Don't do this when making xmakefile! */
111 extern int sign_extend_temp;
112 #endif
113
114 #if u3b2 || u3b5 || u3b15
115
116 /* On 3b2/5/15, data space has high order bit on. */
117 #define VALBITS 27
118 #define VALMASK (((1<<VALBITS) - 1) | (1 << 31))
119 #define XTYPE(a) ((enum Lisp_Type) (((a) >> VALBITS) & GCTYPEMASK))
120
121 #endif /* 3b2, 3b5 or 3b15 */
122
123 #define TEXT_START 0
124
125
126 /* For alloca.c (not actually used, since HAVE_ALLOCA) */
127 #define STACK_DIRECTION 1
128
129 /* (short) negative-int doesn't sign-extend correctly */
130 #define SHORT_CAST_BUG
131
132 /* 3B2s with WIN/3B have winsize defined in ptem.h */
133 #if u3b2
134 #define NEED_PTEM_H
135 #endif /* u3b2 */
136
137 /* 3b2 does not have memmove, I'm told. */
138 /* It is safe to have no parens around the args in the safe_bcopy call,
139 and parens would screw up the prototype decl for memmove. */
140 #define memmove(d, s, n) safe_bcopy (s, d, n)
141
142 /* This affects filemode.c. */
143 #define NO_MODE_T