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

   1 /* amdahl machine description file
   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 This file for amdahl_uts created by modifying the template.h
  22 by Jishnu Mukerji 3/1/87
  23
  24 The following line tells the configuration script what sort of
  25 operating system this machine is likely to run.
  26 USUAL-OPSYS="usg5-2-2"
  27
  28 This file works with the Amdahl uts native C compiler. The 5.2u370
  29 compiler is so brain damaged that it is not even worth trying to use it.
  30 */
  31
  32 /* The following three symbols give information on
  33  the size of various data types.  */
  34
  35 #define SHORTBITS 16            /* Number of bits in a short */
  36
  37 #define INTBITS 32              /* Number of bits in an int */
  38
  39 #define LONGBITS 32             /* Number of bits in a long */
  40
  41 /* Define BIG_ENDIAN iff lowest-numbered byte in a word
  42    is the most significant byte.  */
  43
  44 #define BIG_ENDIAN
  45
  46 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  47  * group of arguments and treat it as an array of the arguments.  */
  48
  49 #undef NO_ARG_ARRAY
  50
  51 /* Define WORD_MACHINE if addresses and such have
  52  * to be corrected before they can be used as byte counts.  */
  53
  54 #define WORD_MACHINE /* not actually used anywhere yet! */
  55
  56 /* Now define a symbol for the cpu type, if your compiler
  57    does not define it automatically:
  58    vax, m68000, ns16000, pyramid, orion, tahoe and APOLLO
  59    are the ones defined so far.  */
  60
  61 /* uts gets defined automatically */
  62 /* However for clarity define amdahl_uts */
  63 #define amdahl_uts
  64
  65 /* Use type int rather than a union, to represent Lisp_Object */
  66 /* This is desirable for most machines.  */
  67
  68 #define NO_UNION_TYPE
  69
  70 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  71    the 24-bit bit field into an int.  In other words, if bit fields
  72    are always unsigned.
  73
  74    If you use NO_UNION_TYPE, this flag does not matter.  */
  75
  76 #define EXPLICIT_SIGN_EXTEND
  77
  78 /* Data type of load average, as read out of kmem.  */
  79
  80 /* #define LOAD_AVE_TYPE long*/
  81
  82 /* Convert that into an integer that is 100 for a load average of 1.0  */
  83
  84 /*#define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0)*/
  85
  86 /* Define CANNOT_DUMP on machines where unexec does not work.
  87    Then the function dump-emacs will not be defined
  88    and temacs will do (load "loadup") automatically unless told otherwise.  */
  89
  90 /* #define CANNOT_DUMP
  91
  92 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  93    pure and impure space as loaded can vary, and even their
  94    relative order cannot be relied on.
  95
  96    Otherwise Emacs assumes that text space precedes data space,
  97    numerically.  */
  98
  99 /* #define VIRT_ADDR_VARIES*/
 100
 101 /* Define C_ALLOCA if this machine does not support a true alloca
 102    and the one written in C should be used instead.
 103    Define HAVE_ALLOCA to say that the system provides a properly
 104    working alloca function and it should be used.
 105    Define neither one if an assembler-language alloca
 106    in the file alloca.s should be used.  */
 107
 108 #define C_ALLOCA
 109 /*#define HAVE_ALLOCA */
 110
 111 #ifdef HAVE_ALLOCA
 112 #define LIB_STANDARD -lPW -lc
 113 #endif
 114
 115 /* Define NO_REMAP if memory segmentation makes it not work well
 116    to change the boundary between the text section and data section
 117    when Emacs is dumped.  If you define this, the preloaded Lisp
 118    code will not be sharable; but that's better than failing completely.  */
 119
 120 /*#define NO_REMAP*/
 121
 122 #define TERMINFO
 123
 124 /* The usual definition of XINT, which involves shifting, does not
 125    sign-extend properly on this machine.  */
 126
 127 #define XINT(i) (((sign_extend_temp=(i)) & 0x00800000) \
 128                  ? (sign_extend_temp | 0xFF000000) \
 129                  : (sign_extend_temp & 0x00FFFFFF))
 130
 131 #ifdef emacs /* Don't do this when making xmakefile! */
 132 extern int sign_extend_temp;
 133 #endif
 134
 135 /* The following needed to load the proper crt0.o and to get the
 136    proper declaration of data_start in the #undef NO_REMAP case */
 137
 138 #ifndef NO_REMAP
 139 #define START_FILES pre-crt0.o /lib/crt0.o
 140 #endif
 141
 142 /* Perhaps this means that the optimizer isn't safe to use.  */
 143
 144 #define C_OPTIMIZE_SWITCH
 145
 146 /* Put text and data on non-segment boundary; makes image smaller */
 147
 148 #define LD_SWITCH_MACHINE       -N
 149
 150 /* When writing the 'xemacs' file, make text segment ro */
 151 #define EXEC_MAGIC      0410
 152
 153 /* Mask for address bits within a memory segment */
 154 #define SEGSIZ 0x10000          /* Should this not be defined elsewhere ? */
 155 #define SEGMENT_MASK (SEGSIZ - 1)
 156
 157 /* Tell alloca.c which direction stack grows.  */
 158 #define STACK_DIRECTION -1
 159
 160 /* Compensate for error in signal.h.  */
 161 #if NSIG==19
 162 #undef NSIG
 163 #define NSIG 20
 164 #endif