src/m/tower32v3.h

   1 /* machine description file for the NCR Tower 32 running System V.3.
   2    Copyright (C) 1986 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is distributed in the hope that it will be useful,
   7 but WITHOUT ANY WARRANTY.  No author or distributor
   8 accepts responsibility to anyone for the consequences of using it
   9 or for whether it serves any particular purpose or works at all,
  10 unless he says so in writing.  Refer to the GNU Emacs General Public
  11 License for full details.
  12
  13 Everyone is granted permission to copy, modify and redistribute
  14 GNU Emacs, but only under the conditions described in the
  15 GNU Emacs General Public License.   A copy of this license is
  16 supposed to have been given to you along with GNU Emacs so you
  17 can know your rights and responsibilities.  It should be in a
  18 file named COPYING.  Among other things, the copyright notice
  19 and this notice must be preserved on all copies.  */
  20
  21
  22 /* The following line tells the configuration script what sort of
  23    operating system this machine is likely to run.
  24    USUAL-OPSYS="usg5-3"  */
  25
  26 /* The following three symbols give information on
  27  the size of various data types.  */
  28
  29 #define SHORTBITS 16            /* Number of bits in a short */
  30
  31 #define INTBITS 32              /* Number of bits in an int */
  32
  33 #define LONGBITS 32             /* Number of bits in a long */
  34
  35 /* Define BIG_ENDIAN iff lowest-numbered byte in a word
  36    is the most significant byte.  */
  37
  38 #define BIG_ENDIAN
  39
  40 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  41  * group of arguments and treat it as an array of the arguments.  */
  42
  43 /* #define NO_ARG_ARRAY */
  44
  45 /* Define WORD_MACHINE if addresses and such have
  46  * to be corrected before they can be used as byte counts.  */
  47
  48 /* #define WORD_MACHINE */
  49
  50 /* Now define a symbol for the cpu type, if your compiler
  51    does not define it automatically:
  52    vax, m68000, ns16000, pyramid, orion, tahoe and APOLLO
  53    are the ones defined so far.  */
  54 #define m68000
  55
  56 /* Use type int rather than a union, to represent Lisp_Object */
  57 /* This is desirable for most machines.  */
  58
  59 #define NO_UNION_TYPE
  60
  61 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  62    the 24-bit bit field into an int.  In other words, if bit fields
  63    are always unsigned.
  64
  65    If you use NO_UNION_TYPE, this flag does not matter.  */
  66
  67 #define EXPLICIT_SIGN_EXTEND
  68
  69 /* Data type of load average, as read out of kmem.  */
  70
  71 /* #define LOAD_AVE_TYPE long */
  72
  73 /* Convert that into an integer that is 100 for a load average of 1.0  */
  74
  75 /* #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE) */
  76
  77 /* Define CANNOT_DUMP on machines where unexec does not work.
  78    Then the function dump-emacs will not be defined
  79    and temacs will do (load "loadup") automatically unless told otherwise.  */
  80
  81 /* #define CANNOT_DUMP */
  82
  83 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  84    pure and impure space as loaded can vary, and even their
  85    relative order cannot be relied on.
  86
  87    Otherwise Emacs assumes that text space precedes data space,
  88    numerically.  */
  89
  90 /* #define VIRT_ADDR_VARIES */
  91
  92 /* Define C_ALLOCA if this machine does not support a true alloca
  93    and the one written in C should be used instead.
  94    Define HAVE_ALLOCA to say that the system provides a properly
  95    working alloca function and it should be used.
  96    Define neither one if an assembler-language alloca
  97    in the file alloca.s should be used.  */
  98
  99 #ifdef __GNUC__
 100 #define HAVE_ALLOCA
 101 #define alloca __builtin_alloca
 102 #define C_OPTIMIZE_SWITCH -O -fstrength-reduce -fomit-frame-pointer
 103 #define LIB_STANDARD -lc /lib/crtn.o
 104 #else
 105 /* This section is correct if you do *not* change src/ymakefile so that
 106    CFLAGS includes C_OPTIMIZE_SWITCH rather than C_DEBUG_SWITCH.  */
 107 #define HAVE_ALLOCA
 108 #define C_DEBUG_SWITCH -g -O0
 109 #define LIB_STANDARD -lc -lPW /lib/crtn.o
 110 /* This section is correct if you do enable C_OPTIMIZE_SWITCH.  */
 111 /* #define C_ALLOCA */
 112 /* #define STACK_DIRECTION -1 */
 113 /* #define C_OPTIMIZE_SWITCH -O2 */
 114 /* #define LIB_STANDARD -lc /lib/crtn.o */
 115 #endif
 116
 117 /* The OS maps the data section far away from the text section.  */
 118 #define NO_REMAP
 119 #define TEXT_START 0
 120 #undef static
 121 #define START_FILES pre-crt0.o /lib/crt1.o
 122
 123 /* This is needed since many Tower models start the data/bss segment at
 124    an address as large as 0x2000000.  */
 125 #define VALBITS 26
 126 #define GCTYPEBITS 5
 127
 128 /* The OS has an implementation of symlinks that is semantically different
 129    from BSD, but for some silly reason it partly has the same syntax.  */
 130 #undef S_IFLNK
 131
 132 /* The OS needs stream.h+ptem.h included in sysdep.c.  */
 133 #define NO_SIOCTL_H
 134 #define NEED_PTEM_H