src/m/sparc.h

   1 /* machine description file for Sun 4 SPARC.
   2    Copyright (C) 1987 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 2, 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 /* The following line tells the configuration script what sort of
  21    operating system this machine is likely to run.
  22    USUAL-OPSYS="note"
  23
  24 NOTE-START
  25 Use -opsystem=sunos4 for operating system version 4, and
  26 -opsystem=bsd4-2 for earlier versions.
  27 NOTE-END  */
  28
  29 /* The following three symbols give information on
  30  the size of various data types.  */
  31
  32 #define SHORTBITS 16            /* Number of bits in a short */
  33
  34 #define INTBITS 32              /* Number of bits in an int */
  35
  36 #define LONGBITS 32             /* Number of bits in a long */
  37
  38 /* SPARC has lowest-numbered byte as most significant */
  39
  40 #ifndef BIG_ENDIAN
  41 #define BIG_ENDIAN
  42 #endif
  43
  44 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  45  * group of arguments and treat it as an array of the arguments.  */
  46
  47 #define NO_ARG_ARRAY
  48
  49 /* Say this machine is a sparc */
  50
  51 #ifndef sparc
  52 #define sparc
  53 #endif
  54
  55 #ifdef __GNUC__
  56 # define C_OPTIMIZE_SWITCH -O
  57 #else
  58      /* This level of optimization is reported to work.  */
  59 # define C_OPTIMIZE_SWITCH -O2
  60 #endif
  61
  62 /* Use type int rather than a union, to represent Lisp_Object */
  63
  64 #define NO_UNION_TYPE
  65
  66 /* XINT must explicitly sign-extend */
  67
  68 #define EXPLICIT_SIGN_EXTEND
  69
  70 /* Data type of load average, as read out of kmem.  */
  71
  72 #define LOAD_AVE_TYPE long
  73
  74 /* Convert that into an integer that is 100 for a load average of 1.0  */
  75
  76 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
  77
  78 /* Define C_ALLOCA if this machine does not support a true alloca
  79    and the one written in C should be used instead.
  80    Define HAVE_ALLOCA to say that the system provides a properly
  81    working alloca function and it should be used.
  82    Define neither one if an assembler-language alloca
  83    in the file alloca.s should be used.  */
  84
  85 #define HAVE_ALLOCA
  86 #if __GNUC__ < 2 /* Modern versions of GCC handle alloca directly.  */
  87 #include <alloca.h>
  88 #endif
  89
  90 /* Must use the system's termcap, if we use any termcap.
  91    It does special things.  */
  92
  93 #ifndef TERMINFO
  94 #define LIBS_TERMCAP -ltermcap
  95 #endif
  96
  97 /* Mask for address bits within a memory segment */
  98
  99 #define SEGMENT_MASK (SEGSIZ - 1)
 100
 101 /* Arrange to link with sun windows, if requested.  */
 102 /* For details on emacstool and sunfns, see etc/SUN-SUPPORT */
 103 /* These programs require Sun UNIX 4.2 Release 3.2 or greater */
 104
 105 #ifdef HAVE_SUN_WINDOWS
 106 #define OTHER_FILES  ${etcdir}emacstool
 107 #define LIBS_MACHINE -lsuntool -lsunwindow -lpixrect
 108 #define OBJECTS_MACHINE sunfns.o
 109 #define SYMS_MACHINE syms_of_sunfns ()
 110 #define PURESIZE 130000
 111 #endif
 112
 113 /* Say that the text segment of a.out includes the header;
 114    the header actually occupies the first few bytes of the text segment
 115    and is counted in hdr.a_text.  */
 116
 117 #define A_TEXT_OFFSET(HDR) sizeof (HDR)
 118
 119 /* This is the offset of the executable's text, from the start of the file.  */
 120
 121 #define A_TEXT_SEEK(HDR) (N_TXTOFF (hdr) + sizeof (hdr))