Mercurial > hg > truffle
comparison graal/com.oracle.max.cri/src/com/oracle/max/cri/ci/CiRegister.java @ 4199:aaac4894175c
Renamed cri packages from sun to oracle.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
---|---|
date | Tue, 03 Jan 2012 16:29:28 +0100 |
parents | graal/com.oracle.max.cri/src/com/sun/cri/ci/CiRegister.java@bc8527f3071c |
children | 12c63380e7ff |
comparison
equal
deleted
inserted
replaced
4198:8c9c0e1eaab1 | 4199:aaac4894175c |
---|---|
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.oracle.max.cri.ci; | |
24 | |
25 import java.io.*; | |
26 import java.util.*; | |
27 | |
28 /** | |
29 * Represents a target machine register. | |
30 */ | |
31 public final class CiRegister implements Comparable<CiRegister>, Serializable { | |
32 | |
33 /** | |
34 * | |
35 */ | |
36 private static final long serialVersionUID = -7213269157816016300L; | |
37 | |
38 /** | |
39 * Invalid register. | |
40 */ | |
41 public static final CiRegister None = new CiRegister(-1, -1, 0, "noreg"); | |
42 | |
43 /** | |
44 * Frame pointer of the current method. All spill slots and outgoing stack-based arguments | |
45 * are addressed relative to this register. | |
46 */ | |
47 public static final CiRegister Frame = new CiRegister(-2, -2, 0, "framereg", RegisterFlag.CPU); | |
48 | |
49 public static final CiRegister CallerFrame = new CiRegister(-3, -3, 0, "callerframereg", RegisterFlag.CPU); | |
50 | |
51 /** | |
52 * The identifier for this register that is unique across all the registers in a {@link CiArchitecture}. | |
53 * A valid register has {@code number > 0}. | |
54 */ | |
55 public final int number; | |
56 | |
57 /** | |
58 * The mnemonic of this register. | |
59 */ | |
60 public final String name; | |
61 | |
62 /** | |
63 * The actual encoding in a target machine instruction for this register, which may or | |
64 * may not be the same as {@link #number}. | |
65 */ | |
66 public final int encoding; | |
67 | |
68 /** | |
69 * The size of the stack slot used to spill the value of this register. | |
70 */ | |
71 public final int spillSlotSize; | |
72 | |
73 /** | |
74 * The set of {@link RegisterFlag} values associated with this register. | |
75 */ | |
76 private final int flags; | |
77 | |
78 /** | |
79 * An array of {@link CiRegisterValue} objects, for this register, with one entry | |
80 * per {@link CiKind}, indexed by {@link CiKind#ordinal}. | |
81 */ | |
82 private final CiRegisterValue[] values; | |
83 | |
84 /** | |
85 * Attributes that characterize a register in a useful way. | |
86 * | |
87 */ | |
88 public enum RegisterFlag { | |
89 /** | |
90 * Denotes an integral (i.e. non floating point) register. | |
91 */ | |
92 CPU, | |
93 | |
94 /** | |
95 * Denotes a register whose lowest order byte can be addressed separately. | |
96 */ | |
97 Byte, | |
98 | |
99 /** | |
100 * Denotes a floating point register. | |
101 */ | |
102 FPU; | |
103 | |
104 public final int mask = 1 << (ordinal() + 1); | |
105 } | |
106 | |
107 /** | |
108 * Creates a {@code CiRegister} instance. | |
109 * | |
110 * @param number unique identifier for the register | |
111 * @param encoding the target machine encoding for the register | |
112 * @param spillSlotSize the size of the stack slot used to spill the value of the register | |
113 * @param name the mnemonic name for the register | |
114 * @param flags the set of {@link RegisterFlag} values for the register | |
115 */ | |
116 public CiRegister(int number, int encoding, int spillSlotSize, String name, RegisterFlag... flags) { | |
117 this.number = number; | |
118 this.name = name; | |
119 this.spillSlotSize = spillSlotSize; | |
120 this.flags = createMask(flags); | |
121 this.encoding = encoding; | |
122 | |
123 values = new CiRegisterValue[CiKind.VALUES.length]; | |
124 for (CiKind kind : CiKind.VALUES) { | |
125 values[kind.ordinal()] = new CiRegisterValue(kind, this); | |
126 } | |
127 } | |
128 | |
129 private static int createMask(RegisterFlag... flags) { | |
130 int result = 0; | |
131 for (RegisterFlag f : flags) { | |
132 result |= f.mask; | |
133 } | |
134 return result; | |
135 } | |
136 | |
137 public boolean isSet(RegisterFlag f) { | |
138 return (flags & f.mask) != 0; | |
139 } | |
140 | |
141 /** | |
142 * Gets this register as a {@linkplain CiRegisterValue value} with a specified kind. | |
143 * @param kind the specified kind | |
144 * @return the {@link CiRegisterValue} | |
145 */ | |
146 public CiRegisterValue asValue(CiKind kind) { | |
147 return values[kind.ordinal()]; | |
148 } | |
149 | |
150 /** | |
151 * Gets this register as a {@linkplain CiRegisterValue value} with no particular kind. | |
152 * @return a {@link CiRegisterValue} with {@link CiKind#Illegal} kind. | |
153 */ | |
154 public CiRegisterValue asValue() { | |
155 return asValue(CiKind.Illegal); | |
156 } | |
157 | |
158 /** | |
159 * Determines if this is a valid register. | |
160 * @return {@code true} iff this register is valid | |
161 */ | |
162 public boolean isValid() { | |
163 return number >= 0; | |
164 } | |
165 | |
166 /** | |
167 * Determines if this a floating point register. | |
168 */ | |
169 public boolean isFpu() { | |
170 return isSet(RegisterFlag.FPU); | |
171 } | |
172 | |
173 /** | |
174 * Determines if this a general purpose register. | |
175 */ | |
176 public boolean isCpu() { | |
177 return isSet(RegisterFlag.CPU); | |
178 } | |
179 | |
180 /** | |
181 * Determines if this register has the {@link RegisterFlag#Byte} attribute set. | |
182 * @return {@code true} iff this register has the {@link RegisterFlag#Byte} attribute set. | |
183 */ | |
184 public boolean isByte() { | |
185 return isSet(RegisterFlag.Byte); | |
186 } | |
187 | |
188 /** | |
189 * Categorizes a set of registers by {@link RegisterFlag}. | |
190 * | |
191 * @param registers a list of registers to be categorized | |
192 * @return a map from each {@link RegisterFlag} constant to the list of registers for which the flag is | |
193 * {@linkplain #isSet(RegisterFlag) set} | |
194 */ | |
195 public static EnumMap<RegisterFlag, CiRegister[]> categorize(CiRegister[] registers) { | |
196 EnumMap<RegisterFlag, CiRegister[]> result = new EnumMap<>(RegisterFlag.class); | |
197 for (RegisterFlag flag : RegisterFlag.values()) { | |
198 ArrayList<CiRegister> list = new ArrayList<>(); | |
199 for (CiRegister r : registers) { | |
200 if (r.isSet(flag)) { | |
201 list.add(r); | |
202 } | |
203 } | |
204 result.put(flag, list.toArray(new CiRegister[list.size()])); | |
205 } | |
206 return result; | |
207 } | |
208 | |
209 /** | |
210 * Gets the maximum register {@linkplain #number number} in a given set of registers. | |
211 * | |
212 * @param registers the set of registers to process | |
213 * @return the maximum register number for any register in {@code registers} | |
214 */ | |
215 public static int maxRegisterNumber(CiRegister[] registers) { | |
216 int max = Integer.MIN_VALUE; | |
217 for (CiRegister r : registers) { | |
218 if (r.number > max) { | |
219 max = r.number; | |
220 } | |
221 } | |
222 return max; | |
223 } | |
224 | |
225 /** | |
226 * Gets the maximum register {@linkplain #encoding encoding} in a given set of registers. | |
227 * | |
228 * @param registers the set of registers to process | |
229 * @return the maximum register encoding for any register in {@code registers} | |
230 */ | |
231 public static int maxRegisterEncoding(CiRegister[] registers) { | |
232 int max = Integer.MIN_VALUE; | |
233 for (CiRegister r : registers) { | |
234 if (r.encoding > max) { | |
235 max = r.encoding; | |
236 } | |
237 } | |
238 return max; | |
239 } | |
240 | |
241 @Override | |
242 public String toString() { | |
243 return name; | |
244 } | |
245 | |
246 @Override | |
247 public int compareTo(CiRegister o) { | |
248 if (number < o.number) { | |
249 return -1; | |
250 } | |
251 if (number > o.number) { | |
252 return 1; | |
253 } | |
254 return 0; | |
255 } | |
256 | |
257 } |