src/m/iris4d.h

   1 /* machine description file for Iris-4D machines.  Use with s/irix*.h.
   2    Copyright (C) 1987, 2002, 2003, 2004, 2005,
   3                  2006 Free Software Foundation, Inc.
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs; see the file COPYING.  If not, write to
  19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, USA.  */
  21
  22
  23 /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
  24    is the most significant byte.  */
  25
  26 #define WORDS_BIG_ENDIAN
  27
  28 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  29  * group of arguments and treat it as an array of the arguments.  */
  30
  31 #define NO_ARG_ARRAY
  32
  33 /* Define WORD_MACHINE if addresses and such have
  34  * to be corrected before they can be used as byte counts.  */
  35
  36 #undef WORD_MACHINE
  37
  38 /* Now define a symbol for the cpu type, if your compiler
  39    does not define it automatically:
  40    Ones defined so far include vax, m68000, ns16000, pyramid,
  41    orion, tahoe, APOLLO and many others */
  42
  43 #ifndef mips
  44 #define mips
  45 #endif
  46
  47 #ifndef IRIS_4D
  48 #define IRIS_4D
  49 #endif
  50
  51 /* Use type int rather than a union, to represent Lisp_Object */
  52 /* This is desirable for most machines.  */
  53
  54 #define NO_UNION_TYPE
  55
  56 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  57    the bit field into an int.  In other words, if bit fields
  58    are always unsigned.
  59
  60    If you use NO_UNION_TYPE, this flag does not matter.  */
  61
  62 #define EXPLICIT_SIGN_EXTEND
  63
  64 /* jg@genmagic.genmagic.com (John Giannandrea) says this is unnecessary.  */
  65 #if 0
  66 /* Data type of load average, as read out of kmem.  */
  67
  68 #define LOAD_AVE_TYPE long      /* This doesn't quite work on the 4D */
  69
  70 /* Convert that into an integer that is 100 for a load average of 1.0  */
  71
  72 #define LOAD_AVE_CVT(x) (int)(((double)(x)*100)/1024.0)
  73
  74 /* s-iris3-6.h uses /vmunix */
  75
  76 #undef KERNEL_FILE
  77 #define KERNEL_FILE "/unix"
  78 #endif
  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
  84 #undef CANNOT_DUMP
  85
  86 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  87    pure and impure space as loaded can vary, and even their
  88    relative order cannot be relied on.
  89
  90    Otherwise Emacs assumes that text space precedes data space,
  91    numerically.  */
  92
  93 /* #define VIRT_ADDR_VARIES */
  94
  95 /* Define NO_REMAP if memory segmentation makes it not work well
  96    to change the boundary between the text section and data section
  97    when Emacs is dumped.  If you define this, the preloaded Lisp
  98    code will not be sharable; but that's better than failing completely.  */
  99
 100 #define NO_REMAP
 101
 102 /* This machine requires completely different unexec code
 103    which lives in a separate file.  Specify the file name.  */
 104
 105 #ifdef USG5_4
 106 #undef UNEXEC
 107 #define UNEXEC unexelf.o
 108 #else
 109 #define UNEXEC unexmips.o
 110 #endif
 111
 112 #define TEXT_START 0x400000
 113
 114 /*
 115  * DATA_SEG_BITS forces extra bits to be or'd in with any pointers which
 116  * were stored in a Lisp_Object (as Emacs uses fewer than 32 bits for
 117  * the value field of a LISP_OBJECT).
 118  */
 119
 120 #define DATA_START 0x10000000
 121 #define DATA_SEG_BITS   0x10000000
 122
 123 #undef LIBS_MACHINE
 124 /* -lsun in case using Yellow Pages for passwords.  */
 125 #if defined(__GNUC__) && defined(_ABIN32)
 126 #define LIBS_MACHINE
 127 #else
 128 #ifndef IRIX6_5
 129 #define LIBS_MACHINE -lmld
 130 #else
 131 #define LIBS_MACHINE
 132 #endif
 133 #endif
 134 #define LIBS_DEBUG
 135
 136 /* Define this if you have a fairly recent system,
 137    in which crt1.o and crt1.n should be used.  */
 138 #define HAVE_CRTN
 139
 140 #ifndef USG5_4
 141 #ifdef HAVE_CRTN
 142 /* Must define START-FILES so that the linker can find /usr/lib/crt0.o.  */
 143 #define START_FILES pre-crt0.o /usr/lib/crt1.o
 144 #define LIB_STANDARD -lc /usr/lib/crtn.o
 145 #else
 146 #define START_FILES pre-crt0.o /usr/lib/crt0.o
 147 /* The entry-point label (start of text segment) is `start', not `__start'.  */
 148 #define DEFAULT_ENTRY_ADDRESS start
 149 #define LIB_STANDARD -lc
 150 #endif
 151 #endif
 152 \f
 153 /* Use terminfo instead of termcap.  */
 154
 155 #define TERMINFO
 156
 157 /* Letter to use in finding device name of first pty,
 158   if system supports pty's.  'a' means it is /dev/ptya0  */
 159
 160 #undef FIRST_PTY_LETTER
 161 #define FIRST_PTY_LETTER 'q'
 162 \f
 163 #if _MIPS_SZLONG != 64
 164 /* fixme: should there be 64-bit defiitions?  (The ones below aren't
 165    OK.)  */
 166
 167 /* The standard definitions of these macros would work ok,
 168    but these are faster because the constants are short.  */
 169
 170 #define XUINT(a) (((unsigned)(a) << BITS_PER_INT-VALBITS) >> BITS_PER_INT-VALBITS)
 171
 172 #define XSET(var, type, ptr) \
 173    ((var) = ((int)(type) << VALBITS) + (((unsigned) (ptr) << BITS_PER_INT-VALBITS) >> BITS_PER_INT-VALBITS))
 174 #endif /* _LP64 */
 175
 176 #ifndef __GNUC__
 177 /* Turn off some "helpful" error checks for type mismatches
 178    that we can't fix without breaking other machines.  */
 179 #ifdef IRIX_FORCE_32_BITS
 180 #ifdef THIS_IS_MAKEFILE
 181 #ifndef IRIX6_5
 182 #define C_SWITCH_MACHINE -32
 183 #else
 184 #define C_SWITCH_MACHINE -n32
 185 #endif
 186 #endif
 187 #endif
 188
 189 #endif /* not __GNUC__ */
 190
 191 /* arch-tag: fff5e139-9ae0-465d-afec-837c41ea0aa6
 192    (do not change this comment) */