src/m/celerity.h

   1 /* machine description file for Celerity.
   2    Copyright (C) 1985, 1986 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="bsd4-2"  */
  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 /* XINT must explicitly sign extend */
  40
  41 #define EXPLICIT_SIGN_EXTEND
  42
  43 /* Define how to take a char and sign-extend into an int.
  44    On machines where char is signed, this is a no-op.  */
  45
  46 #define SIGN_EXTEND_CHAR(c) (c)
  47
  48 /* celerity preprocessor defines "accel", however the following is clearer */
  49 #define celerity
  50
  51 /* #define NO_UNION_TYPE would be preferable,
  52    but it does not work, and the reason is not yet known.  */
  53
  54 #define NO_UNION_TYPE
  55
  56 /* Data type of load average, as read out of kmem.  */
  57
  58 #define LOAD_AVE_TYPE double
  59
  60 /* Convert that into an integer that is 100 for a load average of 1.0  */
  61
  62 #define LOAD_AVE_CVT(x) ((int) ((x) * 100.0))
  63
  64 /* A machine-specific loader switch is needed.  */
  65
  66 #define LD_SWITCH_MACHINE -k100000
  67
  68 /* alloca is provided by the system.  */
  69
  70 #define HAVE_ALLOCA
  71
  72 /* (short) negative-int doesn't sign-extend correctly */
  73 #define SHORT_CAST_BUG