Mercurial > hg > truffle
comparison src/cpu/x86/vm/interpreter_x86.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | 2338d41fbd81 |
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-1:000000000000 | 0:a61af66fc99e |
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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 } |