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Annotation of GNUtools/emacs/src/m-isi-ov.h, revision 1.1.1.1

1.1       root        1: /* m- file for ISI 68000's
                      2:    Copyright (C) 1985, 1986 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
                      8: the Free Software Foundation; either version 1, or (at your option)
                      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
                     18: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
                     19: 
                     20: 
                     21: #define ISI68K
                     22: 
                     23: /* The following three symbols give information on
                     24:  the size of various data types.  */
                     25: 
                     26: #define SHORTBITS 16           /* Number of bits in a short */
                     27: 
                     28: #define INTBITS 32             /* Number of bits in an int */
                     29: 
                     30: #define LONGBITS 32            /* Number of bits in a long */
                     31: 
                     32: /* 68000 has lowest-numbered byte as most significant */
                     33: 
                     34: #define BIG_ENDIAN
                     35: 
                     36: /* Define how to take a char and sign-extend into an int.
                     37:    On machines where char is signed, this is a no-op.  */
                     38: 
                     39: #define SIGN_EXTEND_CHAR(c) (c)
                     40: 
                     41: /* Say this machine is a 68000 */
                     42: 
                     43: #define m68000
                     44: 
                     45: /* Use type int rather than a union, to represent Lisp_Object */
                     46: 
                     47: #define NO_UNION_TYPE
                     48: 
                     49: /* XINT must explicitly sign-extend */
                     50: 
                     51: #define EXPLICIT_SIGN_EXTEND
                     52: 
                     53: /* Data type of load average, as read out of kmem.  */
                     54: 
                     55: #ifdef BSD4_3
                     56: #define LOAD_AVE_TYPE long
                     57: #else
                     58: #define LOAD_AVE_TYPE double
                     59: #endif BSD4_3
                     60: 
                     61: /* Convert that into an integer that is 100 for a load average of 1.0  */
                     62: 
                     63: #ifdef BSD4_3
                     64: #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
                     65: #else
                     66: #define LOAD_AVE_CVT(x) ((int) ((x) * 100.0))
                     67: #endif
                     68: 
                     69: /* Mask for address bits within a memory segment */
                     70: 
                     71: #define SEGMENT_MASK 0x1ffff
                     72: 
                     73: /* use the -20 switch to get the 68020 code */
                     74: /* #define C_SWITCH_MACHINE -20 */
                     75: 
                     76: /* Use the version of the library for the 68020
                     77:    because the standard library requires some special hacks in crt0
                     78:    which the GNU crt0 does not have.  */
                     79: 
                     80: #define LIB_STANDARD -lmc
                     81: 
                     82: /* macros to make unexec work right */
                     83: 
                     84: #define A_TEXT_OFFSET(HDR) sizeof(HDR)
                     85: #define A_TEXT_SEEK(HDR) sizeof(HDR)
                     86: 
                     87: /* A few changes for the newer systems.  */
                     88: 
                     89: #ifdef BSD4_3
                     90: #define HAVE_ALLOCA
                     91: /* The following line affects crt0.c.  */
                     92: #undef m68k
                     93: 
                     94: #undef LIB_STANDARD
                     95: #define LIB_STANDARD -lmc -lc
                     96: #define C_DEBUG_SWITCH -20 -O -X23
                     97: #endif

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