1 /*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "managed_register_mips.h"
18
19 #include "globals.h"
20
21 namespace art {
22 namespace mips {
23
Overlaps(const MipsManagedRegister & other) const24 bool MipsManagedRegister::Overlaps(const MipsManagedRegister& other) const {
25 if (IsNoRegister() || other.IsNoRegister()) return false;
26 CHECK(IsValidManagedRegister());
27 CHECK(other.IsValidManagedRegister());
28 if (Equals(other)) return true;
29 if (IsRegisterPair()) {
30 Register low = AsRegisterPairLow();
31 Register high = AsRegisterPairHigh();
32 return MipsManagedRegister::FromCoreRegister(low).Overlaps(other) ||
33 MipsManagedRegister::FromCoreRegister(high).Overlaps(other);
34 }
35 if (IsOverlappingDRegister()) {
36 if (other.IsDRegister()) return Equals(other);
37 if (other.IsFRegister()) {
38 FRegister low = AsOverlappingDRegisterLow();
39 FRegister high = AsOverlappingDRegisterHigh();
40 FRegister other_freg = other.AsFRegister();
41 return (low == other_freg) || (high == other_freg);
42 }
43 return false;
44 }
45 if (other.IsRegisterPair() || other.IsOverlappingDRegister()) {
46 return other.Overlaps(*this);
47 }
48 return false;
49 }
50
51
AllocIdLow() const52 int MipsManagedRegister::AllocIdLow() const {
53 CHECK(IsOverlappingDRegister() || IsRegisterPair());
54 const int r = RegId() - (kNumberOfCoreRegIds + kNumberOfFRegIds);
55 int low;
56 if (r < kNumberOfOverlappingDRegIds) {
57 CHECK(IsOverlappingDRegister());
58 low = (r * 2) + kNumberOfCoreRegIds; // Return an FRegister.
59 } else {
60 CHECK(IsRegisterPair());
61 low = (r - kNumberOfDRegIds) * 2 + 2; // Return a Register.
62 if (low >= 24) {
63 // we got a pair higher than S6_S7, must be the dalvik special case
64 low = 5;
65 }
66 }
67 return low;
68 }
69
70
AllocIdHigh() const71 int MipsManagedRegister::AllocIdHigh() const {
72 return AllocIdLow() + 1;
73 }
74
75
Print(std::ostream & os) const76 void MipsManagedRegister::Print(std::ostream& os) const {
77 if (!IsValidManagedRegister()) {
78 os << "No Register";
79 } else if (IsCoreRegister()) {
80 os << "Core: " << static_cast<int>(AsCoreRegister());
81 } else if (IsRegisterPair()) {
82 os << "Pair: " << AsRegisterPairLow() << ", " << AsRegisterPairHigh();
83 } else if (IsFRegister()) {
84 os << "FRegister: " << static_cast<int>(AsFRegister());
85 } else if (IsDRegister()) {
86 os << "DRegister: " << static_cast<int>(AsDRegister());
87 } else {
88 os << "??: " << RegId();
89 }
90 }
91
operator <<(std::ostream & os,const MipsManagedRegister & reg)92 std::ostream& operator<<(std::ostream& os, const MipsManagedRegister& reg) {
93 reg.Print(os);
94 return os;
95 }
96
operator <<(std::ostream & os,const RegisterPair & reg)97 std::ostream& operator<<(std::ostream& os, const RegisterPair& reg) {
98 os << MipsManagedRegister::FromRegisterPair(reg);
99 return os;
100 }
101
102 } // namespace mips
103 } // namespace art
104