![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to m-intel386.h CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Apple XNU] / GNUtools / emacs / src|
Return to m-intel386.h CVS log | Up to [Apple XNU] / GNUtools / emacs / src |
1.1 root 1: /* m- file for intel 386.
2: Copyright (C) 1987 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 1, 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 GNU Emacs; see the file COPYING. If not, write to
18: the 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: #define SHORTBITS 16 /* Number of bits in a short */
25:
26: #define INTBITS 32 /* Number of bits in an int */
27:
28: #define LONGBITS 32 /* Number of bits in a long */
29:
30: /* i386 is not big-endian: lowest numbered byte is least significant. */
31:
32: /* #undef BIG_ENDIAN */
33:
34: /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
35: * group of arguments and treat it as an array of the arguments. */
36:
37: /* #define NO_ARG_ARRAY */
38:
39: /* Define WORD_MACHINE if addresses and such have
40: * to be corrected before they can be used as byte counts. */
41:
42: /* #define WORD_MACHINE */
43:
44: /* Define how to take a char and sign-extend into an int.
45: On machines where char is signed, this is a no-op. */
46:
47: #define SIGN_EXTEND_CHAR(c) (c)
48:
49: /* Now define a symbol for the cpu type, if your compiler
50: does not define it automatically:
51: Ones defined so far include vax, m68000, ns16000, pyramid,
52: orion, tahoe, APOLLO and many others */
53:
54: #define INTEL386
55:
56: /* Use type int rather than a union, to represent Lisp_Object */
57:
58: #define NO_UNION_TYPE
59:
60: /* crt0.c, if it is used, should use the i386-bsd style of entry.
61: with no extra dummy args. On USG and XENIX,
62: NO_REMAP says this isn't used. */
63:
64: #define CRT0_DUMMIES bogus_fp,
65:
66: /* crt0.c should define a symbol `start' and do .globl with a dot. */
67:
68: #define DOT_GLOBAL_START
69:
70: #ifdef XENIX
71: /* Data type of load average, as read out of kmem. */
72: #define LOAD_AVE_TYPE short
73:
74: /* Convert that into an integer that is 100 for a load average of 1.0 */
75: #define LOAD_AVE_CVT(x) (((double) (x)) * 100.0 / FSCALE)
76:
77: #define FSCALE 256.0 /* determined by experimentation... */
78: #endif
79:
80: #ifdef USG5_4 /* Older USG systems do not support the load average. */
81: /* Data type of load average, as read out of kmem. */
82:
83: #define LOAD_AVE_TYPE long
84:
85: /* Convert that into an integer that is 100 for a load average of 1.0 */
86: /* This is totally uncalibrated. */
87:
88: #define LOAD_AVE_CVT(x) ((int) (((double) (x)) * 100.0 / FSCALE))
89: #define FSCALE 256.0
90: #endif
91:
92: #ifdef J386BSD
93: /* Data type of load average, as read out of kmem. */
94:
95: #define LOAD_AVE_TYPE unsigned long
96:
97: /* Convert that into an integer that is 100 for a load average of 1.0. */
98: #define LOAD_AVE_CVT(x) ((int) (((double) (x)) * 100.0 / FSCALE))
99:
100: #endif /* J386BSD */
101:
102: /* Define CANNOT_DUMP on machines where unexec does not work.
103: Then the function dump-emacs will not be defined
104: and temacs will do (load "loadup") automatically unless told otherwise. */
105:
106: /* #define CANNOT_DUMP */
107:
108: /* Define VIRT_ADDR_VARIES if the virtual addresses of
109: pure and impure space as loaded can vary, and even their
110: relative order cannot be relied on.
111:
112: Otherwise Emacs assumes that text space precedes data space,
113: numerically. */
114:
115: /* #define VIRT_ADDR_VARIES */
116:
117: #ifdef XENIX
118: #define VALBITS 26
119: #define GCTYPEBITS 5
120:
121: /* Define NO_REMAP if memory segmentation makes it not work well
122: to change the boundary between the text section and data section
123: when Emacs is dumped. If you define this, the preloaded Lisp
124: code will not be sharable; but that's better than failing completely. */
125:
126: #define NO_REMAP
127:
128: #define STACK_DIRECTION -1
129:
130: /* Since cannot purify, use standard Xenix 386 startup code. */
131:
132: #define START_FILES /lib/386/Sseg.o pre-crt0.o /lib/386/Scrt0.o
133:
134: /* These really use terminfo. */
135:
136: #define LIBS_TERMCAP /lib/386/Slibcurses.a \
137: /lib/386/Slibtinfo.a /lib/386/Slibx.a
138:
139: /* Standard libraries for this machine. Since `-l' doesn't work in `ld'. */
140: /* '__fltused' is unresolved w/o Slibcfp.a */
141: #define LIB_STANDARD /lib/386/Slibcfp.a /lib/386/Slibc.a
142: #else /* not XENIX */
143:
144: #ifdef USG
145: #ifdef USG5_4
146: #define C_ALLOCA
147: #endif /* USG5_4 */
148: #ifndef LIB_STANDARD
149: #if defined (__GNUC__) || defined (C_ALLOCA)
150: #define LIB_STANDARD -lc
151: #else
152: #define LIB_STANDARD -lPW -lc
153: #endif
154: #endif /* no LIB_STANDARD */
155: #ifndef C_ALLOCA
156: #define HAVE_ALLOCA
157: #endif
158: #define NO_REMAP
159: #define TEXT_START 0
160: #endif /* USG */
161: #endif /* not XENIX */
162:
163: #ifdef BSD
164: #define HAVE_ALLOCA
165: #endif /* BSD */
166:
167: /* If compiling with GCC, let GCC implement alloca. */
168: #if defined(__GNUC__) && !defined(alloca)
169: #define alloca(n) __builtin_alloca(n)
170: #define HAVE_ALLOCA
171: #endif
172:
173: #ifdef USG
174: #ifdef __STDC__
175: #ifndef DONT_DEFINE_SIGNAL
176: /* Cast the function argument to avoid warnings. */
177: #define signal(sig, func) (signal (sig, (void (*) (int)) (func)))
178: #endif
179: #endif
180: #endif
181:
182: #ifdef USG5_4
183: #define DATA_SEG_BITS 0x08000000
184: #endif
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.