| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "managed_register_mips.h" |
| |
| #include "globals.h" |
| |
| namespace art { |
| namespace mips { |
| |
| bool MipsManagedRegister::Overlaps(const MipsManagedRegister& other) const { |
| if (IsNoRegister() || other.IsNoRegister()) return false; |
| CHECK(IsValidManagedRegister()); |
| CHECK(other.IsValidManagedRegister()); |
| if (Equals(other)) return true; |
| if (IsRegisterPair()) { |
| Register low = AsRegisterPairLow(); |
| Register high = AsRegisterPairHigh(); |
| return MipsManagedRegister::FromCoreRegister(low).Overlaps(other) || |
| MipsManagedRegister::FromCoreRegister(high).Overlaps(other); |
| } |
| if (IsOverlappingDRegister()) { |
| if (other.IsDRegister()) return Equals(other); |
| if (other.IsFRegister()) { |
| FRegister low = AsOverlappingDRegisterLow(); |
| FRegister high = AsOverlappingDRegisterHigh(); |
| FRegister other_freg = other.AsFRegister(); |
| return (low == other_freg) || (high == other_freg); |
| } |
| return false; |
| } |
| if (other.IsRegisterPair() || other.IsOverlappingDRegister()) { |
| return other.Overlaps(*this); |
| } |
| return false; |
| } |
| |
| |
| int MipsManagedRegister::AllocIdLow() const { |
| CHECK(IsOverlappingDRegister() || IsRegisterPair()); |
| const int r = RegId() - (kNumberOfCoreRegIds + kNumberOfFRegIds); |
| int low; |
| if (r < kNumberOfOverlappingDRegIds) { |
| CHECK(IsOverlappingDRegister()); |
| low = (r * 2) + kNumberOfCoreRegIds; // Return an FRegister. |
| } else { |
| CHECK(IsRegisterPair()); |
| low = (r - kNumberOfDRegIds) * 2 + 2; // Return a Register. |
| if (low >= 24) { |
| // we got a pair higher than S6_S7, must be the dalvik special case |
| low = 5; |
| } |
| } |
| return low; |
| } |
| |
| |
| int MipsManagedRegister::AllocIdHigh() const { |
| return AllocIdLow() + 1; |
| } |
| |
| |
| void MipsManagedRegister::Print(std::ostream& os) const { |
| if (!IsValidManagedRegister()) { |
| os << "No Register"; |
| } else if (IsCoreRegister()) { |
| os << "Core: " << static_cast<int>(AsCoreRegister()); |
| } else if (IsRegisterPair()) { |
| os << "Pair: " << AsRegisterPairLow() << ", " << AsRegisterPairHigh(); |
| } else if (IsFRegister()) { |
| os << "FRegister: " << static_cast<int>(AsFRegister()); |
| } else if (IsDRegister()) { |
| os << "DRegister: " << static_cast<int>(AsDRegister()); |
| } else { |
| os << "??: " << RegId(); |
| } |
| } |
| |
| std::ostream& operator<<(std::ostream& os, const MipsManagedRegister& reg) { |
| reg.Print(os); |
| return os; |
| } |
| |
| std::ostream& operator<<(std::ostream& os, const RegisterPair& reg) { |
| os << MipsManagedRegister::FromRegisterPair(reg); |
| return os; |
| } |
| |
| } // namespace mips |
| } // namespace art |