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, Inc., 59 Temple Place - Suite 330,
  22 Boston, MA 02111-1307, USA.  */
  23
  24 /* The following line tells the configuration script what sort of
  25    operating system this machine is likely to run.
  26    USUAL-OPSYS="bsd4-2"  */
  27
  28 /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
  29    is the most significant byte.  */
  30
  31 #define WORDS_BIG_ENDIAN
  32
  33 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  34  * group of arguments and treat it as an array of the arguments.  */
  35
  36 #ifdef ALLIANT_1
  37 #define NO_ARG_ARRAY
  38 #endif
  39
  40 /* Define WORD_MACHINE if addresses and such have
  41  * to be corrected before they can be used as byte counts.  */
  42
  43 #undef WORD_MACHINE
  44
  45 /* Now define a symbol for the cpu type, if your compiler
  46    does not define it automatically:
  47    vax, m68000, ns16000, pyramid, orion, tahoe and APOLLO
  48    are the ones defined so far.  */
  49
  50 #define ALLIANT
  51
  52 /* Use type int rather than a union, to represent Lisp_Object */
  53 /* This is desirable for most machines.  */
  54
  55 #define NO_UNION_TYPE
  56
  57 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  58    the 24-bit bit field into an int.  In other words, if bit fields
  59    are always unsigned.
  60
  61    If you use NO_UNION_TYPE, this flag does not matter.  */
  62 /* On Alliants, bitfields are unsigned. */
  63
  64 #define EXPLICIT_SIGN_EXTEND
  65
  66 /* No load average information available for Alliants. */
  67
  68 #undef LOAD_AVE_TYPE
  69 #undef LOAD_AVE_CVT
  70
  71 /* Define CANNOT_DUMP on machines where unexec does not work.
  72    Then the function dump-emacs will not be defined
  73    and temacs will do (load "loadup") automatically unless told otherwise.  */
  74
  75 #undef CANNOT_DUMP
  76
  77 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  78    pure and impure space as loaded can vary, and even their
  79    relative order cannot be relied on.
  80
  81    Otherwise Emacs assumes that text space precedes data space,
  82    numerically.  */
  83
  84 #undef VIRT_ADDR_VARIES
  85
  86 /* Define C_ALLOCA if this machine does not support a true alloca
  87    and the one written in C should be used instead.
  88    Define HAVE_ALLOCA to say that the system provides a properly
  89    working alloca function and it should be used.
  90    Define neither one if an assembler-language alloca
  91    in the file alloca.s should be used.  */
  92
  93 #undef C_ALLOCA
  94 #define HAVE_ALLOCA
  95
  96 #ifdef ALLIANT_1
  97 #define C_ALLOCA
  98 #undef HAVE_ALLOCA
  99 #endif /* ALLIANT_1 */
 100
 101 /* Define NO_REMAP if memory segmentation makes it not work well
 102    to change the boundary between the text section and data section
 103    when Emacs is dumped.  If you define this, the preloaded Lisp
 104    code will not be sharable; but that's better than failing completely.  */
 105 /* Actually, Alliant CONCENTRIX does paging "right":
 106    data pages are copy-on-write, which means that the pure data areas
 107    are shared automatically and remapping is not necessary.  */
 108
 109 #define NO_REMAP
 110
 111 /* Alliant needs special crt0.o because system version is not reentrant */
 112
 113 #define START_FILES crt0.o
 114
 115 /* Alliant dependent code for dumping executing image.
 116    See crt0.c code for alliant.  */
 117
 118 #define ADJUST_EXEC_HEADER {\
 119 extern int _curbrk, _setbrk;\
 120 _setbrk = _curbrk;\
 121 hdr.a_bss_addr = bss_start;\
 122 unexec_text_start = hdr.a_text_addr;}
 123
 124 /* cc screws up on long names.  Try making cpp replace them.  */
 125
 126 #ifdef ALLIANT_1
 127 #define Finsert_abbrev_table_description Finsert_abbrev_table_descrip
 128 #define internal_with_output_to_temp_buffer internal_with_output_to_tem
 129 #endif
 130
 131 /* "vector" is a typedef in /usr/include/machine/reg.h, so its use as
 132    a variable name causes errors when compiling under ANSI C.  */
 133
 134 #define vector xxvector