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1 /* machine description file for Data General AViiON.
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2 Copyright (C) 1985, 1986, 1991 Free Software Foundation, Inc.
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3
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4 This file is part of GNU Emacs.
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5
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6 GNU Emacs is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 2, or (at your option)
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9 any later version.
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10
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11 GNU Emacs is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA. */
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20
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21 /* Synched up with: FSF 19.31. */
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22
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23 /* Define WORD_MACHINE if addresses and such have
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24 * to be corrected before they can be used as byte counts. */
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25
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26 #define WORD_MACHINE
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27
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28 /* Define DATA_SEG_BITS if pointers need to be corrected with
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29 a segment field. */
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30
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31 #ifdef FIX_ADDRESS
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32 #define DATA_SEG_BITS 0xef000000
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33 #endif
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34
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35 /* Now define a symbol for the cpu type, if your compiler
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36 does not define it automatically:
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37 Ones defined so far include vax, m68000, ns16000, pyramid,
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38 orion, tahoe, APOLLO and many others */
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39
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40 /*#ifndef m88k*/
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41 /*#define m88k*/
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42 /*#endif*/
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43
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44 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
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45 the bit field into an int. In other words, if bit fields
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46 are always unsigned.
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47
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48 If you use NO_UNION_TYPE, this flag does not matter. */
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49
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50 #define EXPLICIT_SIGN_EXTEND
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51
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52 /* Data type of load average, as read out of kmem. */
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53
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54 /* #define LOAD_AVE_TYPE long */
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55
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56 /* Convert that into an integer that is 100 for a load average of 1.0 */
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57
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58 /* #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE) */
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59
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60 /* Define CANNOT_DUMP on machines where unexec does not work.
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61 Then the function dump-emacs will not be defined
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62 and temacs will do (load "loadup") automatically unless told otherwise. */
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63
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64 /* #define CANNOT_DUMP */
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65
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66 /* Define VIRT_ADDR_VARIES if the virtual addresses of
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67 pure and impure space as loaded can vary, and even their
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68 relative order cannot be relied on.
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69
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70 Otherwise Emacs assumes that text space precedes data space,
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71 numerically. */
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72
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73 /* #define VIRT_ADDR_VARIES */
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74
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75 /* Define C_ALLOCA if this machine does not support a true alloca
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76 and the one written in C should be used instead.
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77 Define HAVE_ALLOCA to say that the system provides a properly
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78 working alloca function and it should be used.
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79 Define neither one if an assembler-language alloca
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80 in the file alloca.s should be used. */
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81
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82 /* #define C_ALLOCA */
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83 #define HAVE_ALLOCA
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84 #define alloca(x) __builtin_alloca(x)
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85
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86 /* Define NO_REMAP if memory segmentation makes it not work well
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87 to change the boundary between the text section and data section
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88 when Emacs is dumped. If you define this, the preloaded Lisp
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89 code will not be sharable; but that's better than failing completely. */
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90
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91 #define NO_REMAP
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92
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93 /* Define ADDR_CORRECT(ADDR) to be a macro to correct an int which is
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94 the bit pattern of a pointer to a byte into an int which is the
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95 number of a byte.
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96
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97 This macro has a default definition which is usually right.
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98 This default definition is a no-op on most machines (where a
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99 pointer looks like an int) but not on all machines. */
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100
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101 #define ADDR_CORRECT(ADDR) ((int)ADDR)
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102
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103 /* Some machines that use COFF executables require that each section
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104 start on a certain boundary *in the COFF file*. Such machines should
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105 define SECTION_ALIGNMENT to a mask of the low-order bits that must be
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106 zero on such a boundary. This mask is used to control padding between
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107 segments in the COFF file.
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108
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109 If SECTION_ALIGNMENT is not defined, the segments are written
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110 consecutively with no attempt at alignment. This is right for
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111 unmodified system V. */
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112
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113 #define SECTION_ALIGNMENT 0x7
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114
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