| 2 |
7u83 |
1 |
/*
|
|
|
2 |
Crown Copyright (c) 1997
|
|
|
3 |
|
|
|
4 |
This TenDRA(r) Computer Program is subject to Copyright
|
|
|
5 |
owned by the United Kingdom Secretary of State for Defence
|
|
|
6 |
acting through the Defence Evaluation and Research Agency
|
|
|
7 |
(DERA). It is made available to Recipients with a
|
|
|
8 |
royalty-free licence for its use, reproduction, transfer
|
|
|
9 |
to other parties and amendment for any purpose not excluding
|
|
|
10 |
product development provided that any such use et cetera
|
|
|
11 |
shall be deemed to be acceptance of the following conditions:-
|
|
|
12 |
|
|
|
13 |
(1) Its Recipients shall ensure that this Notice is
|
|
|
14 |
reproduced upon any copies or amended versions of it;
|
|
|
15 |
|
|
|
16 |
(2) Any amended version of it shall be clearly marked to
|
|
|
17 |
show both the nature of and the organisation responsible
|
|
|
18 |
for the relevant amendment or amendments;
|
|
|
19 |
|
|
|
20 |
(3) Its onward transfer from a recipient to another
|
|
|
21 |
party shall be deemed to be that party's acceptance of
|
|
|
22 |
these conditions;
|
|
|
23 |
|
|
|
24 |
(4) DERA gives no warranty or assurance as to its
|
|
|
25 |
quality or suitability for any purpose and DERA accepts
|
|
|
26 |
no liability whatsoever in relation to any use to which
|
|
|
27 |
it may be put.
|
|
|
28 |
*/
|
|
|
29 |
|
|
|
30 |
|
|
|
31 |
|
|
|
32 |
|
|
|
33 |
/*
|
|
|
34 |
VERSION INFORMATION
|
|
|
35 |
===================
|
|
|
36 |
|
|
|
37 |
--------------------------------------------------------------------------
|
|
|
38 |
$Header: /u/g/release/CVSROOT/Source/src/installers/sparc/common/guard.c,v 1.1.1.1 1998/01/17 15:55:54 release Exp $
|
|
|
39 |
--------------------------------------------------------------------------
|
|
|
40 |
$Log: guard.c,v $
|
|
|
41 |
* Revision 1.1.1.1 1998/01/17 15:55:54 release
|
|
|
42 |
* First version to be checked into rolling release.
|
|
|
43 |
*
|
|
|
44 |
* Revision 1.4 1997/08/23 13:53:45 pwe
|
|
|
45 |
* initial ANDF-DE
|
|
|
46 |
*
|
|
|
47 |
* Revision 1.3 1996/03/20 16:14:00 john
|
|
|
48 |
* Reformatting
|
|
|
49 |
*
|
|
|
50 |
* Revision 1.2 1995/05/26 12:58:30 john
|
|
|
51 |
* Reformatting
|
|
|
52 |
*
|
|
|
53 |
* Revision 1.1.1.1 1995/03/13 10:18:37 john
|
|
|
54 |
* Entered into CVS
|
|
|
55 |
*
|
|
|
56 |
* Revision 1.4 1994/07/07 16:11:33 djch
|
|
|
57 |
* Jul94 tape
|
|
|
58 |
*
|
|
|
59 |
* Revision 1.3 1994/05/19 08:58:10 djch
|
|
|
60 |
* added empty {} to pacify tcc
|
|
|
61 |
*
|
|
|
62 |
* Revision 1.2 1994/05/13 12:29:31 djch
|
|
|
63 |
* Incorporates improvements from expt version
|
|
|
64 |
*
|
|
|
65 |
* Revision 1.1 1994/05/03 14:49:37 djch
|
|
|
66 |
* Initial revision
|
|
|
67 |
*
|
|
|
68 |
* Revision 1.2 93/08/13 14:37:04 14:37:04 ra (Robert Andrews)
|
|
|
69 |
* Reformatted.
|
|
|
70 |
*
|
|
|
71 |
* Revision 1.1 93/06/24 14:58:26 14:58:26 ra (Robert Andrews)
|
|
|
72 |
* Initial revision
|
|
|
73 |
*
|
|
|
74 |
--------------------------------------------------------------------------
|
|
|
75 |
*/
|
|
|
76 |
|
|
|
77 |
|
|
|
78 |
#define SPARCTRANS_CODE
|
|
|
79 |
|
|
|
80 |
/*
|
|
|
81 |
These routine involve protecting registers from future use. The
|
|
|
82 |
type space consists of two bitmasks, one representing the fixed
|
|
|
83 |
registers and one the floating registers. A bit is set to indicate
|
|
|
84 |
that the corresponding register is in use. These guard routines
|
|
|
85 |
just set the right bit to indicate that the given register is in
|
|
|
86 |
use.
|
|
|
87 |
*/
|
|
|
88 |
|
|
|
89 |
#include "config.h"
|
|
|
90 |
#include "common_types.h"
|
|
|
91 |
#include "regmacs.h"
|
|
|
92 |
#include "procrec.h"
|
|
|
93 |
#include "addrtypes.h"
|
|
|
94 |
#include "tempdecs.h"
|
|
|
95 |
#include "comment.h"
|
|
|
96 |
#include "guard.h"
|
|
|
97 |
|
|
|
98 |
|
|
|
99 |
/*
|
|
|
100 |
GUARD THE FIXED REGISTER r IN sp
|
|
|
101 |
*/
|
|
|
102 |
|
|
|
103 |
space guardreg
|
|
|
104 |
PROTO_N ( ( r, sp ) )
|
|
|
105 |
PROTO_T ( int r X space sp )
|
|
|
106 |
{
|
|
|
107 |
if ( IS_TREG ( r ) ) sp.fixed |= RMASK ( r ) ;
|
|
|
108 |
return ( sp ) ;
|
|
|
109 |
}
|
|
|
110 |
|
|
|
111 |
|
|
|
112 |
/*
|
|
|
113 |
GUARD THE FLOATING REGISTER r IN sp
|
|
|
114 |
*/
|
|
|
115 |
|
|
|
116 |
space guardfreg
|
|
|
117 |
PROTO_N ( ( r, sp ) )
|
|
|
118 |
PROTO_T ( int r X space sp )
|
|
|
119 |
{
|
|
|
120 |
if ( IS_FLT_TREG ( r ) ) sp.flt |= RMASK ( r ) ;
|
|
|
121 |
return ( sp ) ;
|
|
|
122 |
}
|
|
|
123 |
|
|
|
124 |
|
|
|
125 |
/*
|
|
|
126 |
GUARD THE FIXED REGISTER r IN sp
|
|
|
127 |
This routine is like guardreg, but fails if r has already
|
|
|
128 |
been used.
|
|
|
129 |
*/
|
|
|
130 |
|
|
|
131 |
space needreg
|
|
|
132 |
PROTO_N ( ( r, sp ) )
|
|
|
133 |
PROTO_T ( int r X space sp )
|
|
|
134 |
{
|
|
|
135 |
#if 0
|
|
|
136 |
if ( !( tempdecopt && IS_TREG ( r ) ) &&
|
|
|
137 |
( sp.fixed & RMASK ( r ) ) != 0 ) {
|
|
|
138 |
fail ( "needreg : fixed register already in use" ) ;
|
|
|
139 |
}
|
|
|
140 |
#endif
|
|
|
141 |
return ( guardreg ( r, sp ) ) ;
|
|
|
142 |
}
|
|
|
143 |
|
|
|
144 |
|
|
|
145 |
/*
|
|
|
146 |
GUARD THE FLOATING REGISTER r IN sp
|
|
|
147 |
|
|
|
148 |
This routine is like guardfreg, but fails if r has already been used.
|
|
|
149 |
*/
|
|
|
150 |
|
|
|
151 |
space needfreg
|
|
|
152 |
PROTO_N ( ( r, sp ) )
|
|
|
153 |
PROTO_T ( int r X space sp )
|
|
|
154 |
{
|
|
|
155 |
#if 0
|
|
|
156 |
if ( !( tempdecopt && IS_FLT_TREG ( r ) ) &&
|
|
|
157 |
( sp.flt & RMASK ( r ) ) != 0 ) {
|
|
|
158 |
fail ( "needfreg : float register already in use" ) ;
|
|
|
159 |
}
|
|
|
160 |
#endif
|
|
|
161 |
return ( guardfreg ( r, sp ) ) ;
|
|
|
162 |
}
|
|
|
163 |
|
|
|
164 |
|
|
|
165 |
/*
|
|
|
166 |
GUARD ANY REGISTERS FROM w IN sp
|
|
|
167 |
*/
|
|
|
168 |
|
|
|
169 |
space guard
|
|
|
170 |
PROTO_N ( ( w, sp ) )
|
|
|
171 |
PROTO_T ( where w X space sp ){
|
|
|
172 |
switch ( discrim ( w.answhere ) ) {
|
|
|
173 |
case inreg : {
|
|
|
174 |
/* guard fixed registers */
|
|
|
175 |
int r = regalt ( w.answhere ) ;
|
|
|
176 |
if ( IS_TREG ( r ) ) sp.fixed |= RMASK ( r ) ;
|
|
|
177 |
return ( sp ) ;
|
|
|
178 |
}
|
|
|
179 |
case infreg : {
|
|
|
180 |
/* guard floating registers */
|
|
|
181 |
int r = fregalt ( w.answhere ).fr ;
|
|
|
182 |
if ( IS_FLT_TREG ( r ) ) sp.flt |= RMASK ( r ) ;
|
|
|
183 |
return ( sp ) ;
|
|
|
184 |
}
|
|
|
185 |
/* case bitad :*/
|
|
|
186 |
case notinreg : {
|
|
|
187 |
/* guard base register */
|
|
|
188 |
int r = insalt ( w.answhere ).b.base ;
|
|
|
189 |
if ( IS_TREG ( r ) ) sp.fixed |= RMASK ( r ) ;
|
|
|
190 |
return ( sp ) ;
|
|
|
191 |
}
|
|
|
192 |
default: {
|
|
|
193 |
/* fall through to fail */
|
|
|
194 |
}
|
|
|
195 |
}
|
|
|
196 |
fail ( "Bad guard register" ) ;
|
|
|
197 |
return ( sp ) ;
|
|
|
198 |
}
|
|
|
199 |
|
|
|
200 |
|
|
|
201 |
|