m-sun1.h

早期freebsd实现

/* m- file for Sun 68000's
   Copyright (C) 1985, 1986 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 1, 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, 675 Mass Ave, Cambridge, MA 02139, USA.  */


/* The following three symbols give information on
 the size of various data types.  */

#define SHORTBITS 16		/* Number of bits in a short */

#define INTBITS 32		/* Number of bits in an int */

#define LONGBITS 32		/* Number of bits in a long */

/* 68000 has lowest-numbered byte as most significant */

#define BIG_ENDIAN

/* Define how to take a char and sign-extend into an int.
   On machines where char is signed, this is a no-op.  */

#define SIGN_EXTEND_CHAR(c) (c)

/* Say this machine is a 68000 */

#define m68000

/* Use type int rather than a union, to represent Lisp_Object */

#define NO_UNION_TYPE

/* Sun can't write competant compilers */
#define COMPILER_REGISTER_BUG

/* XINT must explicitly sign-extend */

#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)

/* Must use the system's termcap.  It does special things.  */

#define LIBS_TERMCAP -ltermcap

/* Mask for address bits within a memory segment */

#define SEGMENT_MASK (SEGSIZ - 1)