src/m/clipper.h

   1 /* machine description file for clipper
   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 three symbols give information on
  22  the size of various data types.  */
  23
  24 #define SHORTBITS 16            /* Number of bits in a short */
  25
  26 #define INTBITS 32              /* Number of bits in an int */
  27
  28 #define LONGBITS 32             /* Number of bits in a long */
  29
  30 /* Define BIG_ENDIAN iff lowest-numbered byte in a word
  31    is the most significant byte.  */
  32
  33 /* #define BIG_ENDIAN */
  34
  35 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  36  * group of arguments and treat it as an array of the arguments.  */
  37
  38 #define NO_ARG_ARRAY
  39
  40 /* Define WORD_MACHINE if addresses and such have
  41  * to be corrected before they can be used as byte counts.  */
  42
  43 /* #define WORD_MACHINE */
  44
  45 /* Define how to take a char and sign-extend into an int.
  46    On machines where char is signed, this is a no-op.  */
  47
  48 #define SIGN_EXTEND_CHAR(c) ((((int) (c)) << 24) >> 24)
  49 /* #define SIGN_EXTEND_CHAR(c) (c) */
  50
  51 /* Now define a symbol for the cpu type, if your compiler
  52    does not define it automatically */
  53
  54 #define clipper 1
  55
  56 /* Use type int rather than a union, to represent Lisp_Object */
  57
  58 #define NO_UNION_TYPE
  59
  60 /* crt0.c should define a symbol `start' and do .globl with a dot.  */
  61
  62 #define DOT_GLOBAL_START
  63
  64 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  65    the 24-bit bit field into an int.  In other words, if bit fields
  66    are always unsigned.
  67
  68    If you use NO_UNION_TYPE, this flag does not matter.  */
  69
  70 /* #define EXPLICIT_SIGN_EXTEND */
  71
  72 /* USG systems I know of running on Vaxes do not actually
  73    support the load average, so disable it for them.  */
  74
  75 /* Data type of load average, as read out of kmem.  */
  76
  77 #define LOAD_AVE_TYPE double
  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) ((x) * 100.0))
  82
  83 /* Define CANNOT_DUMP on machines where unexec does not work.
  84    Then the function dump-emacs will not be defined
  85    and temacs will do (load "loadup") automatically unless told otherwise.  */
  86 /* #define CANNOT_DUMP */
  87
  88 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  89    pure and impure space as loaded can vary, and even their
  90    relative order cannot be relied on.
  91
  92    Otherwise Emacs assumes that text space precedes data space,
  93    numerically.  */
  94
  95 /* #define VIRT_ADDR_VARIES */  /* Karl Kleinpaste says this isn't needed.  */
  96
  97 /* Define C_ALLOCA if this machine does not support a true alloca
  98    and the one written in C should be used instead.
  99    Define HAVE_ALLOCA to say that the system provides a properly
 100    working alloca function and it should be used.
 101    Define neither one if an assembler-language alloca
 102    in the file alloca.s should be used.  */
 103
 104 #define C_ALLOCA
 105
 106 /* Define NO_REMAP if memory segmentation makes it not work well
 107    to change the boundary between the text section and data section
 108    when Emacs is dumped.  If you define this, the preloaded Lisp
 109    code will not be sharable; but that's better than failing completely.  */
 110
 111 /* #define NO_REMAP */
 112
 113 #ifdef USG
 114 #define TEXT_START 0
 115 #endif /* USG */
 116
 117 #define LD_TEXT_START_ADDR 8000