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20c428fd JB |
1 | /* machine description file for Iris-4D machines. Use with s-iris3-6.h |
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 line tells the configuration script what sort of | |
22 | operating system this machine is likely to run. | |
23 | USUAL-OPSYS="irix3-3" */ | |
24 | ||
25 | /* The following three symbols give information on | |
26 | the size of various data types. */ | |
27 | ||
28 | #define SHORTBITS 16 /* Number of bits in a short */ | |
29 | ||
30 | #define INTBITS 32 /* Number of bits in an int */ | |
31 | ||
32 | #define LONGBITS 32 /* Number of bits in a long */ | |
33 | ||
34 | /* Define BIG_ENDIAN iff lowest-numbered byte in a word | |
35 | is the most significant byte. */ | |
36 | ||
37 | #define BIG_ENDIAN | |
38 | ||
39 | /* Define NO_ARG_ARRAY if you cannot take the address of the first of a | |
40 | * group of arguments and treat it as an array of the arguments. */ | |
41 | ||
42 | #define NO_ARG_ARRAY | |
43 | ||
44 | /* Define WORD_MACHINE if addresses and such have | |
45 | * to be corrected before they can be used as byte counts. */ | |
46 | ||
47 | #undef WORD_MACHINE | |
48 | ||
20c428fd JB |
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 | #ifndef mips | |
55 | #define mips | |
56 | #endif | |
57 | ||
58 | #ifndef IRIS_4D | |
59 | #define IRIS_4D | |
60 | #endif | |
61 | ||
62 | /* Use type int rather than a union, to represent Lisp_Object */ | |
63 | /* This is desirable for most machines. */ | |
64 | ||
65 | #define NO_UNION_TYPE | |
66 | ||
67 | /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend | |
68 | the 24-bit bit field into an int. In other words, if bit fields | |
69 | are always unsigned. | |
70 | ||
71 | If you use NO_UNION_TYPE, this flag does not matter. */ | |
72 | ||
73 | #define EXPLICIT_SIGN_EXTEND | |
74 | ||
75 | /* Data type of load average, as read out of kmem. */ | |
76 | ||
77 | #define LOAD_AVE_TYPE long /* This doesn't quite work on the 4D */ | |
78 | ||
79 | /* Convert that into an integer that is 100 for a load average of 1.0 */ | |
80 | ||
81 | #define LOAD_AVE_CVT(x) (int)(((double)(x)*100)/1024.0) | |
82 | ||
83 | /* s-iris3-6.h uses /vmunix */ | |
84 | ||
85 | #undef KERNEL_FILE | |
86 | #define KERNEL_FILE "/unix" | |
87 | ||
88 | /* Define CANNOT_DUMP on machines where unexec does not work. | |
89 | Then the function dump-emacs will not be defined | |
90 | and temacs will do (load "loadup") automatically unless told otherwise. */ | |
91 | ||
92 | #undef CANNOT_DUMP | |
93 | ||
94 | /* Define VIRT_ADDR_VARIES if the virtual addresses of | |
95 | pure and impure space as loaded can vary, and even their | |
96 | relative order cannot be relied on. | |
97 | ||
98 | Otherwise Emacs assumes that text space precedes data space, | |
99 | numerically. */ | |
100 | ||
101 | /* #define VIRT_ADDR_VARIES */ | |
102 | ||
103 | /* Define C_ALLOCA if this machine does not support a true alloca | |
104 | and the one written in C should be used instead. | |
105 | Define HAVE_ALLOCA to say that the system provides a properly | |
106 | working alloca function and it should be used. | |
107 | Define neither one if an assembler-language alloca | |
108 | in the file alloca.s should be used. */ | |
109 | ||
110 | #define C_ALLOCA | |
111 | /* #define HAVE_ALLOCA */ | |
112 | ||
113 | /* Define NO_REMAP if memory segmentation makes it not work well | |
114 | to change the boundary between the text section and data section | |
115 | when Emacs is dumped. If you define this, the preloaded Lisp | |
116 | code will not be sharable; but that's better than failing completely. */ | |
117 | ||
118 | #define NO_REMAP | |
119 | ||
120 | /* This machine requires completely different unexec code | |
121 | which lives in a separate file. Specify the file name. */ | |
122 | ||
123 | #define UNEXEC unexmips.o | |
124 | ||
125 | #define TEXT_START 0x400000 | |
126 | ||
127 | /* | |
128 | * DATA_SEG_BITS forces that bit to be or'd in with any pointers which | |
129 | * are trying to access pure strings (as gnu-emacs only allows 24 bits | |
130 | * for the value field of a LISP_OBJECT). | |
131 | */ | |
132 | ||
133 | #define DATA_START 0x10000000 | |
134 | #define DATA_SEG_BITS 0x10000000 | |
135 | ||
136 | #undef LIBS_MACHINE | |
137 | /* -lsun in case using Yellow Pages for passwords. */ | |
138 | #define LIBS_MACHINE -lsun -lmld | |
139 | #define LIBS_DEBUG | |
140 | ||
141 | /* Define this if you have a fairly recent system, | |
142 | in which crt1.o and crt1.n should be used. */ | |
143 | #define HAVE_CRTN | |
144 | ||
145 | #ifdef HAVE_CRTN | |
146 | /* Must define START-FILES so that the linker can find /usr/lib/crt0.o. */ | |
147 | #define START_FILES pre-crt0.o /usr/lib/crt1.o | |
148 | #define LIB_STANDARD -lbsd -lc /usr/lib/crtn.o | |
149 | #else | |
150 | #define START_FILES pre-crt0.o /usr/lib/crt0.o | |
151 | /* The entry-point label (start of text segment) is `start', not `__start'. */ | |
152 | #define DEFAULT_ENTRY_ADDRESS start | |
153 | #define LIB_STANDARD -lbsd -lc | |
154 | #endif | |
155 | \f | |
156 | /* Use terminfo instead of termcap. */ | |
157 | ||
158 | #define TERMINFO | |
159 | ||
20c428fd JB |
160 | /* Letter to use in finding device name of first pty, |
161 | if system supports pty's. 'a' means it is /dev/ptya0 */ | |
162 | ||
163 | #undef FIRST_PTY_LETTER | |
164 | #define FIRST_PTY_LETTER 'q' | |
165 | ||
166 | /* Define STACK_DIRECTION for alloca.c */ | |
167 | ||
168 | #define STACK_DIRECTION -1 | |
169 | \f | |
170 | /* The standard definitions of these macros would work ok, | |
171 | but these are faster because the constants are short. */ | |
172 | ||
173 | #define XUINT(a) (((unsigned)(a) << INTBITS-VALBITS) >> INTBITS-VALBITS) | |
174 | ||
175 | #define XSET(var, type, ptr) \ | |
176 | ((var) = ((int)(type) << VALBITS) + (((unsigned) (ptr) << INTBITS-VALBITS) >> INTBITS-VALBITS)) | |
177 | ||
178 | #define XSETINT(a, b) XSET(a, XTYPE(a), b) | |
179 | #define XSETUINT(a, b) XSET(a, XTYPE(a), b) | |
180 | #define XSETPNTR(a, b) XSET(a, XTYPE(a), b) | |
181 | ||
182 | #define XMARKBIT(a) ((a) < 0) | |
183 | #define XSETMARKBIT(a,b) ((a) = ((a) & ~MARKBIT) | ((b) ? MARKBIT : 0)) | |
184 | #define XUNMARK(a) ((a) = (((unsigned)(a) << INTBITS-GCTYPEBITS-VALBITS) >> INTBITS-GCTYPEBITS-VALBITS)) | |
23b0668c JB |
185 | |
186 | /* Turn off some "helpful" error checks for type mismatches | |
187 | that we can't fix without breaking other machines. */ | |
188 | #define C_SWITCH_MACHINE -cckr |