![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to m-att3b.h CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [CSRG BSD Unix] / 43BSDReno / contrib / emacs-18.55 / src|
Return to m-att3b.h CVS log | Up to [CSRG BSD Unix] / 43BSDReno / contrib / emacs-18.55 / src |
1.1 root 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 ([email protected]) 6/6/86
5:
6: This file is part of GNU Emacs.
7:
8: GNU Emacs is distributed in the hope that it will be useful,
9: but WITHOUT ANY WARRANTY. No author or distributor
10: accepts responsibility to anyone for the consequences of using it
11: or for whether it serves any particular purpose or works at all,
12: unless he says so in writing. Refer to the GNU Emacs General Public
13: License for full details.
14:
15: Everyone is granted permission to copy, modify and redistribute
16: GNU Emacs, but only under the conditions described in the
17: GNU Emacs General Public License. A copy of this license is
18: supposed to have been given to you along with GNU Emacs so you
19: can know your rights and responsibilities. It should be in a
20: file named COPYING. Among other things, the copyright notice
21: and this notice must be preserved on all copies. */
22:
23:
24: /* The following three symbols give information on
25: the size of various data types. */
26:
27: #define SHORTBITS 16 /* Number of bits in a short */
28:
29: #define INTBITS 32 /* Number of bits in an int */
30:
31: #define LONGBITS 32 /* Number of bits in a long */
32:
33: /* Define BIG_ENDIAN iff lowest-numbered byte in a word
34: is the most significant byte. */
35:
36: #define BIG_ENDIAN
37:
38: /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
39: * group of arguments and treat it as an array of the arguments. */
40:
41: /* #define NO_ARG_ARRAY */
42:
43: /* Define WORD_MACHINE if addresses and such have
44: * to be corrected before they can be used as byte counts. */
45:
46: /* #define WORD_MACHINE */
47:
48: /* Define how to take a char and sign-extend into an int.
49: On machines where char is signed, this is a no-op. */
50: /* The 3b20 doesn't sign extend characters OR ints, so
51: right shifting an int loses the sign bit */
52: #define SIGN_EXTEND_CHAR(c) (((sign_extend_temp=(c)) & 0x80) \
53: ? (sign_extend_temp | 0xFFFFFF00) \
54: : (sign_extend_temp))
55:
56: /* Now define a symbol for the cpu type, if your compiler
57: does not define it automatically */
58: #define ATT3B
59:
60: /* Use type int rather than a union, to represent Lisp_Object */
61: /* This is desirable for most machines. */
62:
63: #define NO_UNION_TYPE
64:
65: /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
66: the 24-bit bit field into an int. In other words, if bit fields
67: are always unsigned.
68:
69: If you use NO_UNION_TYPE, this flag does not matter. */
70:
71: #define EXPLICIT_SIGN_EXTEND
72:
73: /* Data type of load average, as read out of kmem. */
74: /* #define LOAD_AVE_TYPE long */
75:
76: /* Convert that into an integer that is 100 for a load average of 1.0 */
77:
78: /* #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE) */
79:
80: /* Define CANNOT_DUMP on machines where unexec does not work.
81: Then the function dump-emacs will not be defined
82: and temacs will do (load "loadup") automatically unless told otherwise. */
83: /* #define CANNOT_DUMP */
84:
85: /* Define VIRT_ADDR_VARIES if the virtual addresses of
86: pure and impure space as loaded can vary, and even their
87: relative order cannot be relied on.
88:
89: Otherwise Emacs assumes that text space precedes data space,
90: numerically. */
91:
92: /* #define VIRT_ADDR_VARIES */ /* Karl Kleinpaste says this isn't needed. */
93:
94: /* Define C_ALLOCA if this machine does not support a true alloca
95: and the one written in C should be used instead.
96: Define HAVE_ALLOCA to say that the system provides a properly
97: working alloca function and it should be used.
98: Define neither one if an assembler-language alloca
99: in the file alloca.s should be used. */
100:
101: /* SysV has alloca in the PW library */
102:
103: #define LIB_STANDARD -lPW -lc
104: #define HAVE_ALLOCA
105:
106: /* Define NO_REMAP if memory segmentation makes it not work well
107: to change the boundary between the text section and data section
108: when Emacs is dumped. If you define this, the preloaded Lisp
109: code will not be sharable; but that's better than failing completely. */
110:
111: #define NO_REMAP
112:
113: /* #define LD_SWITCH_MACHINE -N */
114:
115: /* Use Terminfo, not Termcap. */
116:
117: #define TERMINFO
118:
119: /* -O has been observed to make correct C code in Emacs not work.
120: So don't try to use it. */
121:
122: #if u3b2 || u3b5 || u3b15
123: #define C_OPTIMIZE_SWITCH
124: #endif
125:
126: /* Define our page size. */
127:
128: #define NBPC 2048
129:
130: /* The usual definition of XINT, which involves shifting, does not
131: sign-extend properly on this machine. */
132:
133: #define XINT(i) (((sign_extend_temp=(i)) & 0x00800000) \
134: ? (sign_extend_temp | 0xFF000000) \
135: : (sign_extend_temp & 0x00FFFFFF))
136:
137: #ifdef emacs /* Don't do this when makeing xmakefile! */
138: extern int sign_extend_temp;
139: #endif
140:
141: #if u3b2 || u3b5 || u3b15
142:
143: /* On 3b2/5/15, data space has high order bit on. */
144: #define VALMASK (((1<<VALBITS) - 1) | (1 << 31))
145: #define XTYPE(a) ((enum Lisp_Type) (((a) >> VALBITS) & 0x7F))
146: #define GCTYPEBITS 5
147: #define XADDRFIX(a) ((a) |= 0X80000000) /* Because of high order */
148:
149: #endif /* 3b2, 3b5 or 3b15 */
150:
151: #define TEXT_START 0
152:
153:
154: /* For alloca.c (not actually used, since HAVE_ALLOCA) */
155: #define STACK_DIRECTION 1
156:
157: /* (short) negative-int doesn't sign-extend correctly */
158: #define SHORT_CAST_BUG
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.