Mercurial > hg > graal-jvmci-8
annotate jvmci/jdk.vm.ci.code/src/jdk/vm/ci/code/RegisterSaveLayout.java @ 24218:719853999215 jvmci-0.32
Merge with jdk8u141-b15
| author | Doug Simon <doug.simon@oracle.com> |
|---|---|
| date | Mon, 14 Aug 2017 23:20:38 +0200 |
| parents | 9e1235406b59 |
| children |
| rev | line source |
|---|---|
| 22054 | 1 /* |
| 2 * Copyright (c) 2013, 2014, 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 */ | |
|
22672
1bbd4a7c274b
Rename jdk.internal.jvmci to jdk.vm.ci
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
22569
diff
changeset
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23 package jdk.vm.ci.code; |
| 22054 | 24 |
|
22569
ec96f33a101d
updated imports to be explicit and added checkstyle rule to forbid * imports
Doug Simon <doug.simon@oracle.com>
parents:
22054
diff
changeset
|
25 import java.util.Arrays; |
|
ec96f33a101d
updated imports to be explicit and added checkstyle rule to forbid * imports
Doug Simon <doug.simon@oracle.com>
parents:
22054
diff
changeset
|
26 import java.util.HashMap; |
|
ec96f33a101d
updated imports to be explicit and added checkstyle rule to forbid * imports
Doug Simon <doug.simon@oracle.com>
parents:
22054
diff
changeset
|
27 import java.util.HashSet; |
|
ec96f33a101d
updated imports to be explicit and added checkstyle rule to forbid * imports
Doug Simon <doug.simon@oracle.com>
parents:
22054
diff
changeset
|
28 import java.util.Map; |
|
ec96f33a101d
updated imports to be explicit and added checkstyle rule to forbid * imports
Doug Simon <doug.simon@oracle.com>
parents:
22054
diff
changeset
|
29 import java.util.TreeMap; |
| 22054 | 30 |
| 31 /** | |
| 32 * A map from registers to frame slots. This can be used to describe where callee saved registers | |
| 33 * are saved in a callee's frame. | |
| 34 */ | |
| 35 public final class RegisterSaveLayout { | |
| 36 | |
| 37 /** | |
| 38 * Keys. | |
| 39 */ | |
| 40 private final Register[] registers; | |
| 41 | |
| 42 /** | |
| 43 * Slot indexes relative to stack pointer. | |
| 44 */ | |
| 45 private final int[] slots; | |
| 46 | |
| 47 /** | |
| 48 * Creates a map from registers to frame slots. | |
| 49 * | |
| 50 * @param registers the keys in the map | |
| 51 * @param slots frame slot index for each register in {@code registers} | |
| 52 */ | |
|
23700
9e1235406b59
[Findbugs] various warnings reported for JVMCI sources (JDK-8159613)
Doug Simon <doug.simon@oracle.com>
parents:
22672
diff
changeset
|
53 @SuppressFBWarnings(value = "EI_EXPOSE_REP2", justification = "caller transfers ownership of `registers` and `slots`") |
| 22054 | 54 public RegisterSaveLayout(Register[] registers, int[] slots) { |
| 55 assert registers.length == slots.length; | |
| 56 this.registers = registers; | |
| 57 this.slots = slots; | |
| 58 assert registersToSlots(false).size() == registers.length : "non-unique registers"; | |
| 59 assert new HashSet<>(registersToSlots(false).values()).size() == slots.length : "non-unqiue slots"; | |
| 60 } | |
| 61 | |
| 62 /** | |
| 63 * Gets the frame slot index for a given register. | |
| 64 * | |
| 65 * @param register register to get the frame slot index for | |
| 66 * @return frame slot index | |
| 67 */ | |
| 68 public int registerToSlot(Register register) { | |
| 69 for (int i = 0; i < registers.length; i++) { | |
| 70 if (register.equals(registers[i])) { | |
| 71 return slots[i]; | |
| 72 } | |
| 73 } | |
| 74 throw new IllegalArgumentException(register + " not saved by this layout: " + this); | |
| 75 } | |
| 76 | |
| 77 /** | |
| 78 * Gets this layout information as a {@link Map} from registers to slots. | |
| 79 */ | |
| 80 public Map<Register, Integer> registersToSlots(boolean sorted) { | |
| 81 Map<Register, Integer> result; | |
| 82 if (sorted) { | |
| 83 result = new TreeMap<>(); | |
| 84 } else { | |
| 85 result = new HashMap<>(); | |
| 86 } | |
| 87 for (int i = 0; i < registers.length; i++) { | |
| 88 result.put(registers[i], slots[i]); | |
| 89 } | |
| 90 return result; | |
| 91 } | |
| 92 | |
| 93 /** | |
| 94 * Gets this layout information as a {@link Map} from slots to registers. | |
| 95 */ | |
| 96 public Map<Integer, Register> slotsToRegisters(boolean sorted) { | |
| 97 Map<Integer, Register> result; | |
| 98 if (sorted) { | |
| 99 result = new TreeMap<>(); | |
| 100 } else { | |
| 101 result = new HashMap<>(); | |
| 102 } | |
| 103 for (int i = 0; i < registers.length; i++) { | |
| 104 result.put(slots[i], registers[i]); | |
| 105 } | |
| 106 return result; | |
| 107 } | |
| 108 | |
| 109 @Override | |
| 110 public int hashCode() { | |
| 111 throw new UnsupportedOperationException(); | |
| 112 } | |
| 113 | |
| 114 @Override | |
| 115 public boolean equals(Object obj) { | |
| 116 if (this == obj) { | |
| 117 return true; | |
| 118 } | |
| 119 if (obj instanceof RegisterSaveLayout) { | |
| 120 RegisterSaveLayout that = (RegisterSaveLayout) obj; | |
| 121 if (Arrays.equals(registers, that.registers) && Arrays.equals(slots, that.slots)) { | |
| 122 return true; | |
| 123 } | |
| 124 } | |
| 125 return false; | |
| 126 } | |
| 127 | |
| 128 @Override | |
| 129 public String toString() { | |
| 130 return registersToSlots(true).toString(); | |
| 131 } | |
| 132 } |