1 /* machine description file for IBM S390 in 64-bit mode
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
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, or (at your option)
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.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, USA. */
22 /* This file was made by copying the significant parts of amdx86-64.h
26 /* The following line tells the configuration script what sort of
27 operating system this machine is likely to run.
28 USUAL-OPSYS="<name of system .h file here, without the s- or .h>"
31 IBM s390 64 bits (-machine=ibms390x64)
33 The possibilities for -opsystem are: gnu-linux.
37 #define BITS_PER_LONG 64
38 #define BITS_PER_EMACS_INT 64
40 /* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
41 is the most significant byte. */
43 #define WORDS_BIG_ENDIAN
45 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
46 * group of arguments and treat it as an array of the arguments. */
50 /* Define WORD_MACHINE if addresses and such have
51 * to be corrected before they can be used as byte counts. */
55 /* Now define a symbol for the cpu type, if your compiler
56 does not define it automatically:
57 Ones defined so far include vax, m68000, ns16000, pyramid,
58 orion, tahoe, APOLLO and many others */
60 /* Use type int rather than a union, to represent Lisp_Object */
61 /* This is desirable for most machines. */
65 /* Define the type to use. */
66 #define EMACS_INT long
67 #define EMACS_UINT unsigned long
68 #define SPECIAL_EMACS_INT
70 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
71 the 24-bit bit field into an int. In other words, if bit fields
74 If you use NO_UNION_TYPE, this flag does not matter. */
76 #undef EXPLICIT_SIGN_EXTEND
78 /* Data type of load average, as read out of kmem. */
80 #define LOAD_AVE_TYPE long
82 /* Convert that into an integer that is 100 for a load average of 1.0 */
84 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
86 /* Define CANNOT_DUMP on machines where unexec does not work.
87 Then the function dump-emacs will not be defined
88 and temacs will do (load "loadup") automatically unless told otherwise. */
92 /* Define VIRT_ADDR_VARIES if the virtual addresses of
93 pure and impure space as loaded can vary, and even their
94 relative order cannot be relied on.
96 Otherwise Emacs assumes that text space precedes data space,
99 #define VIRT_ADDR_VARIES
101 /* Define C_ALLOCA if this machine does not support a true alloca
102 and the one written in C should be used instead.
103 Define HAVE_ALLOCA to say that the system provides a properly
104 working alloca function and it should be used.
105 Define neither one if an assembler-language alloca
106 in the file alloca.s should be used. */
111 /* Define NO_REMAP if memory segmentation makes it not work well
112 to change the boundary between the text section and data section
113 when Emacs is dumped. If you define this, the preloaded Lisp
114 code will not be sharable; but that's better than failing completely. */
118 /* Some really obscure 4.2-based systems (like Sequent DYNIX)
119 * do not support asynchronous I/O (using SIGIO) on sockets,
120 * even though it works fine on tty's. If you have one of
121 * these systems, define the following, and then use it in
122 * config.h (or elsewhere) to decide when (not) to use SIGIO.
124 * You'd think this would go in an operating-system description file,
125 * but since it only occurs on some, but not all, BSD systems, the
126 * reasonable place to select for it is in the machine description
133 /* After adding support for a new system, modify the large case
134 statement in the `configure' script to recognize reasonable
135 configuration names, and add a description of the system to
138 If you've just fixed a problem in an existing configuration file,
139 you should also check `etc/MACHINES' to make sure its descriptions
140 of known problems in that configuration should be updated. */
142 #define PNTR_COMPARISON_TYPE unsigned long
144 /* On the 64 bit architecture, we can use 60 bits for addresses */
148 /* This definition of MARKBIT is necessary because of the comparison of
149 ARRAY_MARK_FLAG and MARKBIT in an #if in lisp.h, which cpp doesn't like. */
151 #define MARKBIT 0x8000000000000000L
153 #define LINKER $(CC) -nostdlib
155 /* Define XINT and XUINT so that they can take arguments of type int */
156 #define XINT(a) (((long) (a) << (BITS_PER_LONG - VALBITS)) >> (BITS_PER_LONG - VALBITS))
157 #define XUINT(a) ((long) (a) & VALMASK)
159 /* Define XPNTR to avoid or'ing with DATA_SEG_BITS */
161 #define XPNTR(a) XUINT (a)
164 #ifdef HAVE_X86_64_LIB64_DIR
165 #define START_FILES pre-crt0.o /usr/lib64/crt1.o /usr/lib64/crti.o
167 #define START_FILES pre-crt0.o /usr/lib/crt1.o /usr/lib/crti.o
171 #ifdef HAVE_X86_64_LIB64_DIR
172 #define LIB_STANDARD -lgcc -lc -lgcc /usr/lib64/crtn.o
174 #define LIB_STANDARD -lgcc -lc -lgcc /usr/lib/crtn.o
177 /* arch-tag: 4b87653c-6add-4663-8691-7d9dc17b5519
178 (do not change this comment) */