src/m/alliant.h

   1 /* alliant.h  Alliant machine running system version 2 or 3.
   2    Copyright (C) 1985, 1986, 1987, 2002 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 NO_REMAP if memory segmentation makes it not work well
  87    to change the boundary between the text section and data section
  88    when Emacs is dumped.  If you define this, the preloaded Lisp
  89    code will not be sharable; but that's better than failing completely.  */
  90 /* Actually, Alliant CONCENTRIX does paging "right":
  91    data pages are copy-on-write, which means that the pure data areas
  92    are shared automatically and remapping is not necessary.  */
  93
  94 #define NO_REMAP
  95
  96 /* Alliant needs special crt0.o because system version is not reentrant */
  97
  98 #define START_FILES crt0.o
  99
 100 /* Alliant dependent code for dumping executing image.
 101    See crt0.c code for alliant.  */
 102
 103 #define ADJUST_EXEC_HEADER {\
 104 extern int _curbrk, _setbrk;\
 105 _setbrk = _curbrk;\
 106 hdr.a_bss_addr = bss_start;\
 107 unexec_text_start = hdr.a_text_addr;}
 108
 109 /* cc screws up on long names.  Try making cpp replace them.  */
 110
 111 #ifdef ALLIANT_1
 112 #define Finsert_abbrev_table_description Finsert_abbrev_table_descrip
 113 #define internal_with_output_to_temp_buffer internal_with_output_to_tem
 114 #endif
 115
 116 /* "vector" is a typedef in /usr/include/machine/reg.h, so its use as
 117    a variable name causes errors when compiling under ANSI C.  */
 118
 119 #define vector xxvector