code.delx.au - gnu-emacs/blob - src/m/mips-siemens.h

   1 /* m- file for Mips machines.
   2    Copyright (C) 1987, 1992, 1993, 1995 Free Software Foundation, Inc.
   3
   4    This file contains some changes for our SVR4 based SINIX-Mips 5.4.
   5    I hope this is helpful to port the emacs to our RM?00 series and
   6    maybe to the DC/OSx (Mips-based) machines of Pyramid Inc.
   7      (Marco.Walther@mch.sni.de)
   8
   9 This file is part of GNU Emacs.
  10
  11 GNU Emacs is free software; you can redistribute it and/or modify
  12 it under the terms of the GNU General Public License as published by
  13 the Free Software Foundation; either version 2, or (at your option)
  14 any later version.
  15
  16 GNU Emacs is distributed in the hope that it will be useful,
  17 but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 GNU General Public License for more details.
  20
  21 You should have received a copy of the GNU General Public License
  22 along with GNU Emacs; see the file COPYING.  If not, write to
  23 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  24
  25
  26 /* The following line tells the configuration script what sort of
  27    operating system this machine is likely to run.
  28    USUAL-OPSYS="note"
  29
  30 NOTE-START
  31 Use m-mips4.h for RISCOS version 4; use s-bsd4-3.h with the BSD world.
  32 Note that the proper m- file for the Decstation is m-pmax.h.
  33 This is the m- file for SNI RM*00 machines. Use s- sinix5-4.h file!
  34 With this the file mips-siemens.h is obsolete.
  35 NOTE-END  */
  36
  37 /* The following three symbols give information on
  38  the size of various data types.  */
  39
  40 #define SHORTBITS 16            /* Number of bits in a short */
  41
  42 #define INTBITS 32              /* Number of bits in an int */
  43
  44 #define LONGBITS 32             /* Number of bits in a long */
  45
  46 /* Define BIG_ENDIAN iff lowest-numbered byte in a word
  47    is the most significant byte.  */
  48
  49 #define BIG_ENDIAN
  50
  51 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  52  * group of arguments and treat it as an array of the arguments.  */
  53
  54 #define NO_ARG_ARRAY
  55
  56 /* Define WORD_MACHINE if addresses and such have
  57  * to be corrected before they can be used as byte counts.  */
  58
  59 #undef WORD_MACHINE
  60
  61 /* Define how to take a char and sign-extend into an int.
  62    On machines where char is signed, this is a no-op.  */
  63
  64 #define SIGN_EXTEND_CHAR(c) ((signed char)(c))
  65
  66 /* Now define a symbol for the cpu type, if your compiler
  67    does not define it automatically:
  68    Ones defined so far include vax, m68000, ns16000, pyramid,
  69    orion, tahoe, APOLLO and many others */
  70 #ifndef mips
  71 #       define mips
  72 #endif
  73
  74 /* Use type int rather than a union, to represent Lisp_Object */
  75 /* This is desirable for most machines.  */
  76
  77 #define NO_UNION_TYPE
  78
  79 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  80    the 24-bit bit field into an int.  In other words, if bit fields
  81    are always unsigned.
  82
  83    If you use NO_UNION_TYPE, this flag does not matter.  */
  84
  85 #define EXPLICIT_SIGN_EXTEND
  86
  87 /* Data type of load average, as read out of kmem.  */
  88
  89 #define LOAD_AVE_TYPE long
  90
  91 /* Convert that into an integer that is 100 for a load average of 1.0  */
  92
  93 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / 256.0)
  94
  95 /* CDC EP/IX 1.4.3 uses /unix */
  96
  97 #undef KERNEL_FILE
  98 #define KERNEL_FILE "/unix"
  99
 100 /* Define CANNOT_DUMP on machines where unexec does not work.
 101    Then the function dump-emacs will not be defined
 102    and temacs will do (load "loadup") automatically unless told otherwise.  */
 103
 104 #undef CANNOT_DUMP
 105
 106 /* Define VIRT_ADDR_VARIES if the virtual addresses of
 107    pure and impure space as loaded can vary, and even their
 108    relative order cannot be relied on.
 109
 110    Otherwise Emacs assumes that text space precedes data space,
 111    numerically.  */
 112
 113 /* #define VIRT_ADDR_VARIES */
 114
 115 /* Define C_ALLOCA if this machine does not support a true alloca
 116    and the one written in C should be used instead.
 117    Define HAVE_ALLOCA to say that the system provides a properly
 118    working alloca function and it should be used.
 119    Define neither one if an assembler-language alloca
 120    in the file alloca.s should be used.  */
 121
 122 #ifdef __GNUC__
 123 #define HAVE_ALLOCA
 124 #else
 125 #define C_ALLOCA
 126 #endif
 127
 128 /* Define NO_REMAP if memory segmentation makes it not work well
 129    to change the boundary between the text section and data section
 130    when Emacs is dumped.  If you define this, the preloaded Lisp
 131    code will not be sharable; but that's better than failing completely.  */
 132
 133 #define NO_REMAP
 134
 135 /* Describe layout of the address space in an executing process.  */
 136 /* MARCO ???
 137 */
 138 #define TEXT_START 0x400000
 139 /*
 140 #define DATA_START 0x10000000
 141 #define DATA_SEG_BITS   0x10000000
 142 */
 143 #ifdef UNEXEC
 144 #undef UNEXEC
 145 #endif
 146 #define UNEXEC unexelfsni.o
 147
 148 #undef ORDINARY_LINK
 149
 150 #undef LIBS_DEBUG
 151
 152 /* Alter some of the options used when linking.  */
 153
 154 #define LIBS_MACHINE -lmld
 155 #define START_FILES pre-crt0.o /usr/ccs/lib/crt1.o /usr/ccs/lib/crti.o /usr/ccs/lib/values-Xt.o
 156
 157 #ifdef LIB_STANDARD
 158 #undef LIB_STANDARD
 159 #endif
 160 #define LIB_STANDARD -lc /usr/ccs/lib/crtn.o
 161
 162 #ifdef __GNUC__
 163 #define C_DEBUG_SWITCH
 164 #define C_OPTIMIZE_SWITCH -O
 165 #define LD_SWITCH_MACHINE
 166 #else
 167 #define C_DEBUG_SWITCH -DSYSV
 168 #define C_OPTIMIZE_SWITCH -DSYSV
 169 #define LD_SWITCH_MACHINE
 170 #endif
 171
 172 #if defined(HAVE_X_WINDOWS) && defined(HAVE_X11)
 173 #define HAVE_VFORK              /* Graciously provided by libX.a */
 174 #endif
 175
 176 \f
 177 /* The standard definitions of these macros would work ok,
 178    but these are faster because the constants are short.  */
 179
 180 #define XUINT(a) (((unsigned)(a) << (INTBITS-VALBITS)) >> (INTBITS-VALBITS))
 181
 182 #define XSET(var, type, ptr)                                            \
 183   ((var) =                                                              \
 184    ((int)(type) << VALBITS)                                             \
 185    + (((unsigned) (ptr) << (INTBITS-VALBITS)) >> (INTBITS-VALBITS)))
 186
 187 #define XSETINT(a, b)  XSET(a, XTYPE(a), b)
 188 #define XSETUINT(a, b) XSET(a, XTYPE(a), b)
 189 #define XSETPNTR(a, b) XSET(a, XTYPE(a), b)
 190
 191 #define XUNMARK(a)                                                      \
 192   ((a) =                                                                \
 193    (((unsigned)(a) << (INTBITS-GCTYPEBITS-VALBITS))                     \
 194     >> (INTBITS-GCTYPEBITS-VALBITS)))
 195