src/m/iris4d.h

   1 /* machine description file for Iris-4D machines.  Use with s/irix*.h.
   2    Copyright (C) 1987, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
   3                  2008, 2009, 2010  Free Software Foundation, Inc.
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software: you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation, either version 3 of the License, or
  10 (at your option) any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20
  21 /* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
  22    is the most significant byte.  */
  23
  24 #define WORDS_BIG_ENDIAN
  25
  26 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  27    the bit field into an int.  In other words, if bit fields
  28    are always unsigned.
  29
  30    This flag only matters if you use USE_LISP_UNION_TYPE.  */
  31
  32 #define EXPLICIT_SIGN_EXTEND
  33
  34 #define TEXT_START 0x400000
  35
  36 /*
  37  * DATA_SEG_BITS forces extra bits to be or'd in with any pointers which
  38  * were stored in a Lisp_Object (as Emacs uses fewer than 32 bits for
  39  * the value field of a LISP_OBJECT).
  40  */
  41
  42 #define DATA_START 0x10000000
  43 #define DATA_SEG_BITS   0x10000000
  44
  45 \f
  46 #if _MIPS_SZLONG != 64
  47 /* fixme: should there be 64-bit definitions?  (The ones below aren't OK.)  */
  48
  49 /* The standard definitions of these macros would work ok,
  50    but these are faster because the constants are short.  */
  51
  52 #define XUINT(a) (((unsigned)(a) << BITS_PER_INT-VALBITS) >> BITS_PER_INT-VALBITS)
  53
  54 #define XSET(var, type, ptr) \
  55    ((var) = ((int)(type) << VALBITS) + (((unsigned) (ptr) << BITS_PER_INT-VALBITS) >> BITS_PER_INT-VALBITS))
  56 #endif /* _LP64 */
  57
  58 /* arch-tag: fff5e139-9ae0-465d-afec-837c41ea0aa6
  59    (do not change this comment) */