Mercurial > hg > graal-jvmci-8
comparison graal/Compiler/src/com/sun/c1x/globalstub/GlobalStub.java @ 2507:9ec15d6914ca
Pull over of compiler from maxine repository.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 27 Apr 2011 11:43:22 +0200 |
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2506:4a3bf8a5bf41 | 2507:9ec15d6914ca |
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1 /* | |
2 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
20 * or visit www.oracle.com if you need additional information or have any | |
21 * questions. | |
22 */ | |
23 package com.sun.c1x.globalstub; | |
24 | |
25 import static com.sun.cri.ci.CiKind.*; | |
26 | |
27 import com.sun.cri.ci.*; | |
28 | |
29 /** | |
30 * A global stub is a shared routine that performs an operation on behalf of compiled code. | |
31 * Typically the routine is too large to inline, is infrequent, or requires runtime support. | |
32 * Global stubs are called with a callee-save convention; the global stub must save any | |
33 * registers it may destroy and then restore them upon return. This allows the register | |
34 * allocator to ignore calls to global stubs. Parameters to global stubs are | |
35 * passed on the stack in order to preserve registers for the rest of the code. | |
36 * | |
37 * @author Thomas Wuerthinger | |
38 * @author Ben L. Titzer | |
39 */ | |
40 public class GlobalStub { | |
41 | |
42 public enum Id { | |
43 | |
44 fneg(Float, Float), | |
45 dneg(Double, Double), | |
46 f2i(Int, Float), | |
47 f2l(Long, Float), | |
48 d2i(Int, Double), | |
49 d2l(Long, Double); | |
50 | |
51 public final CiKind resultKind; | |
52 public final CiKind[] arguments; | |
53 | |
54 private Id(CiKind resultKind, CiKind... args) { | |
55 this.resultKind = resultKind; | |
56 this.arguments = args; | |
57 } | |
58 } | |
59 | |
60 public final Id id; | |
61 public final CiKind resultKind; | |
62 public final Object stubObject; | |
63 public final int argsSize; | |
64 public final int[] argOffsets; | |
65 public final int resultOffset; | |
66 | |
67 public GlobalStub(Id id, CiKind resultKind, Object stubObject, int argsSize, int[] argOffsets, int resultOffset) { | |
68 this.id = id; | |
69 this.resultKind = resultKind; | |
70 this.stubObject = stubObject; | |
71 this.argsSize = argsSize; | |
72 this.argOffsets = argOffsets; | |
73 this.resultOffset = resultOffset; | |
74 } | |
75 | |
76 } |