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

   1 /* alliant.h  Alliant machine running system version 2 or 3.
   2    Copyright (C) 1985, 1986, 1987 Free Software Foundation, Inc.
   3    Note that for version 1 of the Alliant system
   4    you should use alliant1.h instead of this file.
   5    Use alliant4.h for version 4.
   6
   7 This file is part of GNU Emacs.
   8
   9 GNU Emacs is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 2, or (at your option)
  12 any later version.
  13
  14 GNU Emacs is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GNU Emacs; see the file COPYING.  If not, write to
  21 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  22
  23 /* The following line tells the configuration script what sort of
  24    operating system this machine is likely to run.
  25    USUAL-OPSYS="bsd4-2"  */
  26
  27 /* The following three symbols give information on
  28  the size of various data types.  */
  29
  30 #define SHORTBITS 16            /* Number of bits in a short */
  31
  32 #define INTBITS 32              /* Number of bits in an int */
  33
  34 #define LONGBITS 32             /* Number of bits in a long */
  35
  36 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  37  * group of arguments and treat it as an array of the arguments.  */
  38
  39 #ifdef ALLIANT_1
  40 #define NO_ARG_ARRAY
  41 #endif
  42
  43 /* Define WORD_MACHINE if addresses and such have
  44  * to be corrected before they can be used as byte counts.  */
  45
  46 #undef WORD_MACHINE
  47
  48 /* Now define a symbol for the cpu type, if your compiler
  49    does not define it automatically:
  50    vax, m68000, ns16000, pyramid, orion, tahoe and APOLLO
  51    are the ones defined so far.  */
  52
  53 #define ALLIANT
  54
  55 /* Use type int rather than a union, to represent Lisp_Object */
  56 /* This is desirable for most machines.  */
  57
  58 #define NO_UNION_TYPE
  59
  60 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  61    the 24-bit bit field into an int.  In other words, if bit fields
  62    are always unsigned.
  63
  64    If you use NO_UNION_TYPE, this flag does not matter.  */
  65 /* On Alliants, bitfields are unsigned. */
  66
  67 #define EXPLICIT_SIGN_EXTEND
  68
  69 /* No load average information available for Alliants. */
  70
  71 #undef LOAD_AVE_TYPE
  72 #undef LOAD_AVE_CVT
  73
  74 /* Define CANNOT_DUMP on machines where unexec does not work.
  75    Then the function dump-emacs will not be defined
  76    and temacs will do (load "loadup") automatically unless told otherwise.  */
  77
  78 #undef CANNOT_DUMP
  79
  80 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  81    pure and impure space as loaded can vary, and even their
  82    relative order cannot be relied on.
  83
  84    Otherwise Emacs assumes that text space precedes data space,
  85    numerically.  */
  86
  87 #undef VIRT_ADDR_VARIES
  88
  89 /* Define C_ALLOCA if this machine does not support a true alloca
  90    and the one written in C should be used instead.
  91    Define HAVE_ALLOCA to say that the system provides a properly
  92    working alloca function and it should be used.
  93    Define neither one if an assembler-language alloca
  94    in the file alloca.s should be used.  */
  95
  96 #undef C_ALLOCA
  97 #define HAVE_ALLOCA
  98
  99 #ifdef ALLIANT_1
 100 #define C_ALLOCA
 101 #undef HAVE_ALLOCA
 102 #endif /* ALLIANT_1 */
 103
 104 /* Define NO_REMAP if memory segmentation makes it not work well
 105    to change the boundary between the text section and data section
 106    when Emacs is dumped.  If you define this, the preloaded Lisp
 107    code will not be sharable; but that's better than failing completely.  */
 108 /* Actually, Alliant CONCENTRIX does paging "right":
 109    data pages are copy-on-write, which means that the pure data areas
 110    are shared automatically and remapping is not necessary.  */
 111
 112 #define NO_REMAP
 113
 114 /* Alliant needs special crt0.o because system version is not reentrant */
 115
 116 #define START_FILES crt0.o
 117
 118 /* Alliant dependent code for dumping executing image.
 119    See crt0.c code for alliant.  */
 120
 121 #define ADJUST_EXEC_HEADER {\
 122 extern int _curbrk, _setbrk;\
 123 _setbrk = _curbrk;\
 124 hdr.a_bss_addr = bss_start;\
 125 unexec_text_start = hdr.a_text_addr;}
 126
 127 /* cc screws up on long names.  Try making cpp replace them.  */
 128
 129 #ifdef ALLIANT_1
 130 #define Finsert_abbrev_table_description Finsert_abbrev_table_descrip
 131 #define internal_with_output_to_temp_buffer internal_with_output_to_tem
 132 #endif
 133
 134 /* "vector" is a typedef in /usr/include/machine/reg.h, so its use as
 135    a variable name causes errors when compiling under ANSI C.  */
 136
 137 #define vector xxvector