[bpt/emacs.git] / src / m / ibms390x.h

/* machine description file for IBM S390 in 64-bit mode
   Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008
     Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */

/* This file was made by copying the significant parts of amdx86-64.h
   into ibms390.h.  */


/* The following line tells the configuration script what sort of
   operating system this machine is likely to run.
   USUAL-OPSYS="<name of system .h file here, without the s- or .h>"

NOTE-START
IBM s390 64 bits (-machine=ibms390x64)

  The possibilities for -opsystem are: gnu-linux.

NOTE-END */

#define BITS_PER_LONG 64
#define BITS_PER_EMACS_INT 64

/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
   is the most significant byte.  */

#define WORDS_BIG_ENDIAN

/* Define NO_ARG_ARRAY if you cannot take the address of the first of a
 * group of arguments and treat it as an array of the arguments.  */

#define NO_ARG_ARRAY

/* Define the type to use.  */
#define EMACS_INT long
#define EMACS_UINT unsigned long

/* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
   the 24-bit bit field into an int.  In other words, if bit fields
   are always unsigned.

   This flag only matters if you use USE_LISP_UNION_TYPE.  */

#undef EXPLICIT_SIGN_EXTEND

/* Data type of load average, as read out of kmem.  */

#define LOAD_AVE_TYPE long

/* Convert that into an integer that is 100 for a load average of 1.0  */

#define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)

/* Define CANNOT_DUMP on machines where unexec does not work.
   Then the function dump-emacs will not be defined
   and temacs will do (load "loadup") automatically unless told otherwise.  */

#undef CANNOT_DUMP

/* Define VIRT_ADDR_VARIES if the virtual addresses of
   pure and impure space as loaded can vary, and even their
   relative order cannot be relied on.

   Otherwise Emacs assumes that text space precedes data space,
   numerically.  */

#define VIRT_ADDR_VARIES

/* Define HAVE_ALLOCA to say that the system provides a properly
   working alloca function and it should be used.  Undefine it if an
   assembler-language alloca in the file alloca.s should be used. */

#define HAVE_ALLOCA

/* Define NO_REMAP if memory segmentation makes it not work well
   to change the boundary between the text section and data section
   when Emacs is dumped.  If you define this, the preloaded Lisp
   code will not be sharable; but that's better than failing completely.  */

#undef NO_REMAP

/* Some really obscure 4.2-based systems (like Sequent DYNIX)
 * do not support asynchronous I/O (using SIGIO) on sockets,
 * even though it works fine on tty's.  If you have one of
 * these systems, define the following, and then use it in
 * config.h (or elsewhere) to decide when (not) to use SIGIO.
 *
 * You'd think this would go in an operating-system description file,
 * but since it only occurs on some, but not all, BSD systems, the
 * reasonable place to select for it is in the machine description
 * file.
 */

#undef NO_SOCK_SIGIO


/* After adding support for a new system, modify the large case
   statement in the `configure' script to recognize reasonable
   configuration names, and add a description of the system to
   `etc/MACHINES'.

   If you've just fixed a problem in an existing configuration file,
   you should also check `etc/MACHINES' to make sure its descriptions
   of known problems in that configuration should be updated.  */

#define PNTR_COMPARISON_TYPE unsigned long

/* On the 64 bit architecture, we can use 60 bits for addresses */

#define VALBITS         60

#define LINKER $(CC) -nostdlib

/* Define XPNTR to avoid or'ing with DATA_SEG_BITS */

#define XPNTR(a) XUINT (a)

#undef START_FILES
#ifdef HAVE_LIB64_DIR
#define START_FILES pre-crt0.o /usr/lib64/crt1.o /usr/lib64/crti.o
#else
#define START_FILES pre-crt0.o /usr/lib/crt1.o /usr/lib/crti.o
#endif

#undef LIB_STANDARD
#ifdef HAVE_LIB64_DIR
#define LIB_STANDARD -lgcc -lc -lgcc /usr/lib64/crtn.o
#else
#define LIB_STANDARD -lgcc -lc -lgcc /usr/lib/crtn.o
#endif

/* arch-tag: 4b87653c-6add-4663-8691-7d9dc17b5519
   (do not change this comment) */
Commit	Line	Data
3e5b698e	1	/* machine description file for IBM S390 in 64-bit mode
49c1c3cc GM	2	Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008
49c1c3cc GM	3	Free Software Foundation, Inc.
3e5b698e RS	4
	5	This file is part of GNU Emacs.
	6
eb3d11ef	7	GNU Emacs is free software: you can redistribute it and/or modify
3e5b698e	8	it under the terms of the GNU General Public License as published by
eb3d11ef GM	9	the Free Software Foundation, either version 3 of the License, or
eb3d11ef GM	10	(at your option) any later version.
3e5b698e RS	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
eb3d11ef	18	along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
3e5b698e RS	19
	20	/* This file was made by copying the significant parts of amdx86-64.h
	21	into ibms390.h. */
	22
	23
99dfbaf1	24	/* The following line tells the configuration script what sort of
3e5b698e RS	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
22e9fe24	38	/* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
3e5b698e RS	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
3e5b698e RS	48	/* Define the type to use. */
	49	#define EMACS_INT long
	50	#define EMACS_UINT unsigned long
3e5b698e RS	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
6e5cb96f	56	This flag only matters if you use USE_LISP_UNION_TYPE. */
3e5b698e RS	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 CANNOT_DUMP on machines where unexec does not work.
	69	Then the function dump-emacs will not be defined
	70	and temacs will do (load "loadup") automatically unless told otherwise. */
	71
	72	#undef CANNOT_DUMP
	73
	74	/* Define VIRT_ADDR_VARIES if the virtual addresses of
	75	pure and impure space as loaded can vary, and even their
	76	relative order cannot be relied on.
	77
	78	Otherwise Emacs assumes that text space precedes data space,
	79	numerically. */
	80
	81	#define VIRT_ADDR_VARIES
	82
99dfbaf1 GM	83	/* Define HAVE_ALLOCA to say that the system provides a properly
	84	working alloca function and it should be used. Undefine it if an
	85	assembler-language alloca in the file alloca.s should be used. */
3e5b698e	86
3e5b698e RS	87	#define HAVE_ALLOCA
	88
	89	/* Define NO_REMAP if memory segmentation makes it not work well
	90	to change the boundary between the text section and data section
	91	when Emacs is dumped. If you define this, the preloaded Lisp
	92	code will not be sharable; but that's better than failing completely. */
	93
	94	#undef NO_REMAP
	95
	96	/* Some really obscure 4.2-based systems (like Sequent DYNIX)
	97	* do not support asynchronous I/O (using SIGIO) on sockets,
	98	* even though it works fine on tty's. If you have one of
	99	* these systems, define the following, and then use it in
	100	* config.h (or elsewhere) to decide when (not) to use SIGIO.
	101	*
	102	* You'd think this would go in an operating-system description file,
	103	* but since it only occurs on some, but not all, BSD systems, the
	104	* reasonable place to select for it is in the machine description
	105	* file.
	106	*/
	107
	108	#undef NO_SOCK_SIGIO
	109
	110
	111	/* After adding support for a new system, modify the large case
	112	statement in the `configure' script to recognize reasonable
	113	configuration names, and add a description of the system to
	114	`etc/MACHINES'.
	115
	116	If you've just fixed a problem in an existing configuration file,
	117	you should also check `etc/MACHINES' to make sure its descriptions
	118	of known problems in that configuration should be updated. */
	119
	120	#define PNTR_COMPARISON_TYPE unsigned long
	121
	122	/* On the 64 bit architecture, we can use 60 bits for addresses */
	123
	124	#define VALBITS 60
	125
3e5b698e RS	126	#define LINKER $(CC) -nostdlib
3e5b698e RS	127
3e5b698e RS	128	/* Define XPNTR to avoid or'ing with DATA_SEG_BITS */
	129
	130	#define XPNTR(a) XUINT (a)
853e72d9	131
d7695a63	132	#undef START_FILES
ea7a608a	133	#ifdef HAVE_LIB64_DIR
d7695a63	134	#define START_FILES pre-crt0.o /usr/lib64/crt1.o /usr/lib64/crti.o
b16ed52d GM	135	#else
	136	#define START_FILES pre-crt0.o /usr/lib/crt1.o /usr/lib/crti.o
	137	#endif
d7695a63 AS	138
d7695a63 AS	139	#undef LIB_STANDARD
ea7a608a	140	#ifdef HAVE_LIB64_DIR
d7695a63	141	#define LIB_STANDARD -lgcc -lc -lgcc /usr/lib64/crtn.o
b16ed52d GM	142	#else
	143	#define LIB_STANDARD -lgcc -lc -lgcc /usr/lib/crtn.o
	144	#endif
d7695a63	145
853e72d9 MB	146	/* arch-tag: 4b87653c-6add-4663-8691-7d9dc17b5519
853e72d9 MB	147	(do not change this comment) */