HCoop / bpt / emacs.git / blame
| Commit | Line | Data |
|---|---|---|
| 20c428fd JB |
1 | /* machine description 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 | /* The following line tells the configuration script what sort of | |
| 22 | operating system this machine is likely to run. | |
| 23 | USUAL-OPSYS="note" | |
| 24 | ||
| 25 | NOTE-START | |
| 26 | Use `-opsystem=bsd4-2' or `-opsystem=bsd4-3'. | |
| 27 | NOTE-END */ | |
| 28 | ||
| 29 | #define ISI68K | |
| 30 | ||
| 31 | /* The following three symbols give information on | |
| 32 | the size of various data types. */ | |
| 33 | ||
| 34 | #define SHORTBITS 16 /* Number of bits in a short */ | |
| 35 | ||
| 36 | #define INTBITS 32 /* Number of bits in an int */ | |
| 37 | ||
| 38 | #define LONGBITS 32 /* Number of bits in a long */ | |
| 39 | ||
| 40 | /* 68000 has lowest-numbered byte as most significant */ | |
| 41 | ||
| 42 | #define BIG_ENDIAN | |
| 43 | ||
| 20c428fd JB |
44 | /* Say this machine is a 68000 */ |
| 45 | ||
| 46 | #define m68000 | |
| 47 | ||
| 48 | /* Use type int rather than a union, to represent Lisp_Object */ | |
| 49 | ||
| 50 | #define NO_UNION_TYPE | |
| 51 | ||
| 52 | /* XINT must explicitly sign-extend */ | |
| 53 | ||
| 54 | #define EXPLICIT_SIGN_EXTEND | |
| 55 | ||
| 56 | /* Data type of load average, as read out of kmem. */ | |
| 57 | ||
| 58 | #ifdef BSD4_3 | |
| 59 | #define LOAD_AVE_TYPE long | |
| 60 | #else | |
| 61 | #define LOAD_AVE_TYPE double | |
| 62 | #endif BSD4_3 | |
| 63 | ||
| 64 | /* Convert that into an integer that is 100 for a load average of 1.0 */ | |
| 65 | ||
| 66 | #ifdef BSD4_3 | |
| 67 | #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE) | |
| 68 | #else | |
| 69 | #define LOAD_AVE_CVT(x) ((int) ((x) * 100.0)) | |
| 70 | #endif | |
| 71 | ||
| 72 | /* Mask for address bits within a memory segment */ | |
| 73 | ||
| 74 | #define SEGMENT_MASK 0x1ffff | |
| 75 | ||
| 76 | /* use the -20 switch to get the 68020 code */ | |
| 77 | /* #define C_SWITCH_MACHINE -20 */ | |
| 78 | ||
| 79 | /* Use the version of the library for the 68020 | |
| 80 | because the standard library requires some special hacks in crt0 | |
| 81 | which the GNU crt0 does not have. */ | |
| 82 | ||
| 83 | #define LIB_STANDARD -lmc | |
| 84 | ||
| 85 | /* macros to make unexec work right */ | |
| 86 | ||
| 87 | #define A_TEXT_OFFSET(HDR) sizeof(HDR) | |
| 88 | #define A_TEXT_SEEK(HDR) sizeof(HDR) | |
| 89 | ||
| 90 | /* A few changes for the newer systems. */ | |
| 91 | ||
| 92 | #ifdef BSD4_3 | |
| 93 | #define HAVE_ALLOCA | |
| 94 | /* The following line affects crt0.c. */ | |
| 95 | #undef m68k | |
| 96 | ||
| 97 | #undef LIB_STANDARD | |
| 98 | #define LIB_STANDARD -lmc -lc | |
| 99 | #define C_DEBUG_SWITCH -20 -O -X23 | |
| 100 | #endif |