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comparison graal/com.oracle.max.cri/src/com/sun/cri/ri/RiRegisterConfig.java @ 3733:e233f5660da4

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Added Java files from Maxine project.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sat, 17 Dec 2011 19:59:18 +0100
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3732:3e2e8b8abdaf 3733:e233f5660da4
1 /*
2 * Copyright (c) 2009, 2011, 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.cri.ri;
24
25 import java.util.*;
26
27 import com.sun.cri.ci.*;
28 import com.sun.cri.ci.CiCallingConvention.Type;
29 import com.sun.cri.ci.CiRegister.RegisterFlag;
30
31 /**
32 * A register configuration binds roles and {@linkplain RiRegisterAttributes attributes}
33 * to physical registers.
34 */
35 public interface RiRegisterConfig {
36
37 /**
38 * Gets the register to be used for returning a value of a given kind.
39 */
40 CiRegister getReturnRegister(CiKind kind);
41
42 /**
43 * Gets the register to which {@link CiRegister#Frame} and {@link CiRegister#CallerFrame} are bound.
44 */
45 CiRegister getFrameRegister();
46
47 CiRegister getScratchRegister();
48
49 /**
50 * Gets the calling convention describing how arguments are passed.
51 *
52 * @param type the type of calling convention being requested
53 * @param parameters the types of the arguments of the call
54 * @param target the target platform
55 * @param stackOnly ignore registers
56 */
57 CiCallingConvention getCallingConvention(Type type, CiKind[] parameters, CiTarget target, boolean stackOnly);
58
59 /**
60 * Gets the ordered set of registers that are can be used to pass parameters
61 * according to a given calling convention.
62 *
63 * @param type the type of calling convention
64 * @param flag specifies whether registers for {@linkplain RegisterFlag#CPU integral} or
65 * {@linkplain} RegisterFlag#FPU floating point} parameters are being requested
66 * @return the ordered set of registers that may be used to pass parameters in a call conforming to {@code type}
67 */
68 CiRegister[] getCallingConventionRegisters(Type type, RegisterFlag flag);
69
70 /**
71 * Gets the set of registers that can be used by the register allocator.
72 */
73 CiRegister[] getAllocatableRegisters();
74
75 /**
76 * Gets the set of registers that can be used by the register allocator,
77 * {@linkplain CiRegister#categorize(CiRegister[]) categorized} by register {@linkplain RegisterFlag flags}.
78 *
79 * @return a map from each {@link RegisterFlag} constant to the list of {@linkplain #getAllocatableRegisters()
80 * allocatable} registers for which the flag is {@linkplain #isSet(RegisterFlag) set}
81 *
82 */
83 EnumMap<RegisterFlag, CiRegister[]> getCategorizedAllocatableRegisters();
84
85 /**
86 * Gets the registers whose values must be preserved by a method across any call it makes.
87 */
88 CiRegister[] getCallerSaveRegisters();
89
90 /**
91 * Gets the layout of the callee save area of this register configuration.
92 *
93 * @return {@code null} if there is no callee save area
94 */
95 CiCalleeSaveLayout getCalleeSaveLayout();
96
97 /**
98 * Gets a map from register {@linkplain CiRegister#number numbers} to register
99 * {@linkplain RiRegisterAttributes attributes} for this register configuration.
100 *
101 * @return an array where an element at index i holds the attributes of the register whose number is i
102 * @see CiRegister#categorize(CiRegister[])
103 */
104 RiRegisterAttributes[] getAttributesMap();
105
106 /**
107 * Gets the register corresponding to a runtime-defined role.
108 *
109 * @param id the identifier of a runtime-defined register role
110 * @return the register playing the role specified by {@code id}
111 */
112 CiRegister getRegisterForRole(int id);
113 }