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1 | /*- |
2 | * Copyright (c) 1980 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
c0567266 KB |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
3cd5310a | 32 | */ |
8b41e38e | 33 | |
3cd5310a | 34 | #ifndef lint |
af359dea | 35 | static char sccsid[] = "@(#)assign.c 5.3 (Berkeley) 4/16/91"; |
5a7ee08a | 36 | #endif /* not lint */ |
8b41e38e ML |
37 | |
38 | /* | |
39 | * assign the value of an expression to a variable (or term) | |
40 | */ | |
41 | ||
42 | #include "defs.h" | |
43 | #include "tree.h" | |
44 | #include "sym.h" | |
45 | #include "process.h" | |
46 | #include "tree.rep" | |
82d3cd01 KM |
47 | #include "process/process.rep" |
48 | #include "process/pxinfo.h" | |
8b41e38e ML |
49 | |
50 | assign(var, exp) | |
51 | NODE *var; | |
52 | NODE *exp; | |
53 | { | |
54 | ADDRESS addr; | |
55 | int varsize; | |
56 | char cvalue; | |
57 | short svalue; | |
58 | long lvalue; | |
59 | ||
60 | if (!compatible(var->nodetype, exp->nodetype)) { | |
61 | error("incompatible types"); | |
62 | } | |
63 | addr = lval(var); | |
64 | eval(exp); | |
65 | varsize = size(var->nodetype); | |
66 | if (varsize < sizeof(long)) { | |
67 | lvalue = pop(long); | |
68 | switch (varsize) { | |
69 | case sizeof(char): | |
70 | cvalue = lvalue; | |
71 | dwrite(&cvalue, addr, varsize); | |
72 | break; | |
73 | ||
74 | case sizeof(short): | |
75 | svalue = lvalue; | |
76 | dwrite(&svalue, addr, varsize); | |
77 | break; | |
78 | ||
79 | default: | |
82d3cd01 KM |
80 | goto othersize; |
81 | /* | |
8b41e38e | 82 | panic("bad size %d", varsize); |
82d3cd01 | 83 | */ |
8b41e38e ML |
84 | } |
85 | } else { | |
82d3cd01 | 86 | othersize: |
8b41e38e ML |
87 | sp -= varsize; |
88 | dwrite(sp, addr, varsize); | |
82d3cd01 KM |
89 | #ifdef tahoe |
90 | downalignstack(); | |
91 | #endif | |
8b41e38e ML |
92 | } |
93 | } |