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comparison src/m/sequent-ptx.h @ 428:3ecd8885ac67 r21-2-22

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Import from CVS: tag r21-2-22
author cvs
date Mon, 13 Aug 2007 11:28:15 +0200
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427:0a0253eac470 428:3ecd8885ac67
1 /* machine description file for SEQUENT machines running DYNIX/ptx
2 Copyright (C) 1985, 1986 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 /* The following line tells the configuration script what sort of
24 operating system this machine is likely to run.
25 USUAL-OPSYS="ptx" */
26
27 #include "intel386.h"
28
29 /* Define how to take a char and sign-extend into an int.
30 On machines where char is signed, this is a no-op. */
31 /* CHECK THIS */
32 #define SIGN_EXTEND_CHAR(c) (c)
33
34 /* Now define a symbol for the cpu type, if your compiler
35 does not define it automatically:
36 Ones defined so far include vax, m68000, ns16000, pyramid,
37 orion, tahoe, APOLLO and many others. */
38
39 /* BTW: ptx defines _SEQUENT_, i386 */
40
41 /* crt0.c should use the vax-bsd style of entry, with these dummy args. */
42 /* Already defined. Assume prior definition works for PTX. */
43 #if 0
44 #undef CRT0_DUMMIES
45 #define CRT0_DUMMIES dummy1, dummy2, dummy3,
46 #endif
47
48 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
49 the 24-bit bit field into an int. In other words, if bit fields
50 are always unsigned.
51
52 If you use NO_UNION_TYPE, this flag does not matter. */
53
54 #define EXPLICIT_SIGN_EXTEND
55
56 /* Data type of load average, as read out of kmem. */
57
58 #define LOAD_AVE_TYPE unsigned long
59
60 /* Convert that into an integer that is 100 for a load average of 1.0 */
61
62 #define FSCALE 1000.0
63 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
64
65 /* Define CANNOT_DUMP on machines where unexec does not work.
66 Then the function dump-emacs will not be defined
67 and temacs will do (load "loadup") automatically unless told otherwise. */
68
69 /* #define CANNOT_DUMP */
70
71 /* Define VIRT_ADDR_VARIES if the virtual addresses of
72 pure and impure space as loaded can vary, and even their
73 relative order cannot be relied on.
74
75 Otherwise Emacs assumes that text space precedes data space,
76 numerically. */
77
78 /* #define VIRT_ADDR_VARIES */
79
80 /* Define C_ALLOCA if this machine does not support a true alloca
81 and the one written in C should be used instead.
82 Define HAVE_ALLOCA to say that the system provides a properly
83 working alloca function and it should be used.
84 Define neither one if an assembler-language alloca
85 in the file alloca.s should be used. */
86
87 #ifndef __GNUC__
88 #define C_ALLOCA
89 #undef HAVE_ALLOCA
90 #endif
91
92 /* Define NO_REMAP if memory segmentation makes it not work well
93 to change the boundary between the text section and data section
94 when Emacs is dumped. If you define this, the preloaded Lisp
95 code will not be sharable; but that's better than failing completely. */
96 /* On PTX, can't seem to get a valid executable unless NO_REMAP is
97 defined. This did work in the Sequent patched Emacs 18.57. */
98 #ifndef NO_REMAP
99 #define NO_REMAP
100 #endif
101 /* #undef NO_REMAP */
102
103 /* If a valid PTX executable could be dumped without NO_REMAP defined,
104 here's a guess at some defines to make it work. */
105 #ifndef NO_REMAP
106
107 /* PTX has getpagesize() but it returns 296. Using the default method of
108 including getpagesize.h in unexec.c returns 4096 which seems more
109 reasonable. */
110 #undef HAVE_GETPAGESIZE
111
112 /* Override magic number for a.out header. */
113 #define EXEC_MAGIC 0411 /* from a.out.h: separated I&D */
114
115 #define ADJUST_TEXT_SCNHDR_SIZE
116 #define ADJUST_TEXTBASE
117
118 /* The file sections in the Symmetry a.out must be on 4K boundaries. */
119 /* #define DATA_SECTION_ALIGNMENT (4096-1) */
120
121 #endif /* ifndef NO_REMAP */
122
123 /* Avoids a compiler bug. */
124 #define TAHOE_REGISTER_BUG
125
126 /* (short) negative-int doesn't sign-extend correctly. */
127 #define SHORT_CAST_BUG
128
129 /* Cause compilations to be done in parallel in ymakefile. */
130 #define MAKE_PARALLEL $&
131
132 /* Use terminfo library. */
133 #define LIBS_TERMCAP "-ltermlib"
134