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/*
* 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
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