code.delx.au - gnu-emacs/blob - src/m/ibms390x.h

   1 /* machine description file for IBM S390 in 64-bit mode
   2    Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
   3      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 /* This file was made by copying the significant parts of amdx86-64.h
  21    into ibms390.h.  */
  22
  23
  24 /* The following line tells the configuration script what sort of
  25    operating system this machine is likely to run.
  26    USUAL-OPSYS="<name of system .h file here, without the s- or .h>"
  27
  28 NOTE-START
  29 IBM s390 64 bits (-machine=ibms390x64)
  30
  31   The possibilities for -opsystem are: gnu-linux.
  32
  33 NOTE-END */
  34
  35 #define BITS_PER_LONG 64
  36 #define BITS_PER_EMACS_INT 64
  37
  38 /* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
  39    is the most significant byte.  */
  40
  41 #define WORDS_BIG_ENDIAN
  42
  43 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  44  * group of arguments and treat it as an array of the arguments.  */
  45
  46 #define NO_ARG_ARRAY
  47
  48 /* Define the type to use.  */
  49 #define EMACS_INT long
  50 #define EMACS_UINT unsigned long
  51
  52 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  53    the 24-bit bit field into an int.  In other words, if bit fields
  54    are always unsigned.
  55
  56    This flag only matters if you use USE_LISP_UNION_TYPE.  */
  57
  58 #undef EXPLICIT_SIGN_EXTEND
  59
  60 /* Data type of load average, as read out of kmem.  */
  61
  62 #define LOAD_AVE_TYPE long
  63
  64 /* Convert that into an integer that is 100 for a load average of 1.0  */
  65
  66 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
  67
  68 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  69    pure and impure space as loaded can vary, and even their
  70    relative order cannot be relied on.
  71
  72    Otherwise Emacs assumes that text space precedes data space,
  73    numerically.  */
  74
  75 #define VIRT_ADDR_VARIES
  76
  77 /* Define HAVE_ALLOCA to say that the system provides a properly
  78    working alloca function and it should be used.  Undefine it if an
  79    assembler-language alloca in the file alloca.s should be used. */
  80
  81 #define HAVE_ALLOCA
  82
  83 /* On the 64 bit architecture, we can use 60 bits for addresses */
  84
  85 #define VALBITS         60
  86
  87 #define LINKER $(CC) -nostdlib
  88
  89 /* Define XPNTR to avoid or'ing with DATA_SEG_BITS */
  90
  91 #define XPNTR(a) XUINT (a)
  92
  93 #undef START_FILES
  94 #define START_FILES pre-crt0.o $(CRT_DIR)/crt1.o $(CRT_DIR)/crti.o
  95
  96 #undef LIB_STANDARD
  97 #define LIB_STANDARD -lgcc -lc -lgcc $(CRT_DIR)/crtn.o
  98
  99 /* arch-tag: 4b87653c-6add-4663-8691-7d9dc17b5519
 100    (do not change this comment) */