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

/* machine description file for Data General AViiON.
   Copyright (C) 1985, 1986, 1991 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 2, 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; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */


/* Define WORDS_BIG_ENDIAN iff 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 WORD_MACHINE if addresses and such have
 * to be corrected before they can be used as byte counts.  */

#define WORD_MACHINE

/* Define DATA_SEG_BITS if pointers need to be corrected with
   a segment field.  */

#ifdef FIX_ADDRESS
#define DATA_SEG_BITS 0xef000000
#endif

/* Now define a symbol for the cpu type, if your compiler
   does not define it automatically:
   Ones defined so far include vax, m68000, ns16000, pyramid,
   orion, tahoe, APOLLO and many others */

#ifndef m88k
#define m88k
#endif

/* Use type int rather than a union, to represent Lisp_Object */
/* This is desirable for most machines.  */

#define NO_UNION_TYPE

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

   If you use NO_UNION_TYPE, this flag does not matter.  */

#define 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.  */

/* #define 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 C_ALLOCA if this machine does not support a true alloca
   and the one written in C should be used instead.
   Define HAVE_ALLOCA to say that the system provides a properly
   working alloca function and it should be used.
   Define neither one if an assembler-language alloca
   in the file alloca.s should be used.  */

/* #define C_ALLOCA */
#define HAVE_ALLOCA
#define alloca(x) __builtin_alloca(x)

/* 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.  */

#define NO_REMAP

/* Define ADDR_CORRECT(ADDR) to be a macro to correct an int which is
   the bit pattern of a pointer to a byte into an int which is the
   number of a byte.

   This macro has a default definition which is usually right.
   This default definition is a no-op on most machines (where a
   pointer looks like an int) but not on all machines. */

#define	ADDR_CORRECT(ADDR) ((int)ADDR)

/* Cast pointers to this type to compare them. */

#define	PNTR_COMPARISON_TYPE	void *

/* Some machines that use COFF executables require that each section
   start on a certain boundary *in the COFF file*.  Such machines should
   define SECTION_ALIGNMENT to a mask of the low-order bits that must be
   zero on such a boundary.  This mask is used to control padding between
   segments in the COFF file.

   If SECTION_ALIGNMENT is not defined, the segments are written
   consecutively with no attempt at alignment.  This is right for
   unmodified system V.  */

#define SECTION_ALIGNMENT 0x7
Commit	Line	Data
20c428fd JB	1	/* machine description file for Data General AViiON.
	2	Copyright (C) 1985, 1986, 1991 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
17385adc	8	the Free Software Foundation; either version 2, or (at your option)
20c428fd JB	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
3b7ad313 EN	18	the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
3b7ad313 EN	19	Boston, MA 02111-1307, USA. */
20c428fd JB	20
20c428fd JB	21
74d3f806 KH	22	/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
	23	is the most significant byte. */
	24
	25	#define WORDS_BIG_ENDIAN
	26
20c428fd JB	27	/* Define NO_ARG_ARRAY if you cannot take the address of the first of a
	28	* group of arguments and treat it as an array of the arguments. */
	29
	30	#define NO_ARG_ARRAY
	31
	32	/* Define WORD_MACHINE if addresses and such have
	33	* to be corrected before they can be used as byte counts. */
	34
	35	#define WORD_MACHINE
	36
20c428fd JB	37	/* Define DATA_SEG_BITS if pointers need to be corrected with
	38	a segment field. */
	39
	40	#ifdef FIX_ADDRESS
	41	#define DATA_SEG_BITS 0xef000000
	42	#endif
	43
	44	/* Now define a symbol for the cpu type, if your compiler
	45	does not define it automatically:
	46	Ones defined so far include vax, m68000, ns16000, pyramid,
	47	orion, tahoe, APOLLO and many others */
	48
	49	#ifndef m88k
	50	#define m88k
	51	#endif
	52
	53	/* Use type int rather than a union, to represent Lisp_Object */
	54	/* This is desirable for most machines. */
	55
	56	#define NO_UNION_TYPE
	57
	58	/* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
09b3d662	59	the bit field into an int. In other words, if bit fields
20c428fd JB	60	are always unsigned.
	61
	62	If you use NO_UNION_TYPE, this flag does not matter. */
	63
	64	#define EXPLICIT_SIGN_EXTEND
	65
	66	/* Data type of load average, as read out of kmem. */
	67
	68	/* #define LOAD_AVE_TYPE long */
	69
	70	/* Convert that into an integer that is 100 for a load average of 1.0 */
	71
	72	/* #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE) */
	73
	74	/* Define CANNOT_DUMP on machines where unexec does not work.
	75	Then the function dump-emacs will not be defined
	76	and temacs will do (load "loadup") automatically unless told otherwise. */
	77
	78	/* #define CANNOT_DUMP */
	79
	80	/* Define VIRT_ADDR_VARIES if the virtual addresses of
	81	pure and impure space as loaded can vary, and even their
	82	relative order cannot be relied on.
	83
	84	Otherwise Emacs assumes that text space precedes data space,
	85	numerically. */
	86
	87	/* #define VIRT_ADDR_VARIES */
	88
	89	/* Define C_ALLOCA if this machine does not support a true alloca
	90	and the one written in C should be used instead.
	91	Define HAVE_ALLOCA to say that the system provides a properly
	92	working alloca function and it should be used.
	93	Define neither one if an assembler-language alloca
	94	in the file alloca.s should be used. */
	95
	96	/* #define C_ALLOCA */
	97	#define HAVE_ALLOCA
	98	#define alloca(x) __builtin_alloca(x)
	99
	100	/* Define NO_REMAP if memory segmentation makes it not work well
	101	to change the boundary between the text section and data section
	102	when Emacs is dumped. If you define this, the preloaded Lisp
	103	code will not be sharable; but that's better than failing completely. */
	104
	105	#define NO_REMAP
	106
20c428fd JB	107	/* Define ADDR_CORRECT(ADDR) to be a macro to correct an int which is
	108	the bit pattern of a pointer to a byte into an int which is the
	109	number of a byte.
	110
	111	This macro has a default definition which is usually right.
	112	This default definition is a no-op on most machines (where a
	113	pointer looks like an int) but not on all machines. */
	114
	115	#define ADDR_CORRECT(ADDR) ((int)ADDR)
	116
	117	/* Cast pointers to this type to compare them. */
	118
	119	#define PNTR_COMPARISON_TYPE void *
	120
	121	/* Some machines that use COFF executables require that each section
	122	start on a certain boundary in the COFF file. Such machines should
	123	define SECTION_ALIGNMENT to a mask of the low-order bits that must be
	124	zero on such a boundary. This mask is used to control padding between
	125	segments in the COFF file.
	126
	127	If SECTION_ALIGNMENT is not defined, the segments are written
	128	consecutively with no attempt at alignment. This is right for
	129	unmodified system V. */
	130
	131	#define SECTION_ALIGNMENT 0x7
	132