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comparison src/cpu/x86/vm/interpreter_x86.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children 2338d41fbd81
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 public:
26
27 // Sentinel placed in the code for interpreter returns so
28 // that i2c adapters and osr code can recognize an interpreter
29 // return address and convert the return to a specialized
30 // block of code to handle compiedl return values and cleaning
31 // the fpu stack.
32 static const int return_sentinel;
33
34
35 static Address::ScaleFactor stackElementScale() {
36 return TaggedStackInterpreter? Address::times_8 : Address::times_4;
37 }
38
39 // Offset from rsp (which points to the last stack element)
40 static int expr_offset_in_bytes(int i) { return stackElementSize()*i ; }
41 static int expr_tag_offset_in_bytes(int i) {
42 assert(TaggedStackInterpreter, "should not call this");
43 return expr_offset_in_bytes(i) + wordSize;
44 }
45
46 // Support for Tagged Stacks
47
48 // Stack index relative to tos (which points at value)
49 static int expr_index_at(int i) {
50 return stackElementWords() * i;
51 }
52
53 static int expr_tag_index_at(int i) {
54 assert(TaggedStackInterpreter, "should not call this");
55 // tag is one word above java stack element
56 return stackElementWords() * i + 1;
57 }
58
59 // Already negated by c++ interpreter
60 static int local_index_at(int i) {
61 assert(i<=0, "local direction already negated");
62 return stackElementWords() * i + (value_offset_in_bytes()/wordSize);
63 }
64
65 static int local_tag_index_at(int i) {
66 assert(i<=0, "local direction already negated");
67 assert(TaggedStackInterpreter, "should not call this");
68 return stackElementWords() * i + (tag_offset_in_bytes()/wordSize);
69 }