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/*
* Copyright (C) 2020 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 "critical_native_abi_fixup_arm.h"
#include "intrinsics.h"
#include "nodes.h"
namespace art HIDDEN {
namespace arm {
// Fix up FP arguments passed in core registers for call to @CriticalNative by inserting fake calls
// to Float.floatToRawIntBits() or Double.doubleToRawLongBits() to satisfy type consistency checks.
static void FixUpArguments(HInvokeStaticOrDirect* invoke) {
DCHECK_EQ(invoke->GetCodePtrLocation(), CodePtrLocation::kCallCriticalNative);
size_t reg = 0u;
for (size_t i = 0, num_args = invoke->GetNumberOfArguments(); i != num_args; ++i) {
HInstruction* input = invoke->InputAt(i);
DataType::Type input_type = input->GetType();
size_t next_reg = reg + 1u;
if (DataType::Is64BitType(input_type)) {
reg = RoundUp(reg, 2u);
next_reg = reg + 2u;
}
if (reg == 4u) {
break; // Remaining arguments are passed on stack.
}
if (DataType::IsFloatingPointType(input_type)) {
InsertFpToIntegralIntrinsic(invoke, i);
}
reg = next_reg;
}
}
bool CriticalNativeAbiFixupArm::Run() {
if (!graph_->HasDirectCriticalNativeCall()) {
return false;
}
for (HBasicBlock* block : graph_->GetReversePostOrder()) {
for (HInstructionIterator it(block->GetInstructions()); !it.Done(); it.Advance()) {
HInstruction* instruction = it.Current();
if (instruction->IsInvokeStaticOrDirect() &&
instruction->AsInvokeStaticOrDirect()->GetCodePtrLocation() ==
CodePtrLocation::kCallCriticalNative) {
FixUpArguments(instruction->AsInvokeStaticOrDirect());
}
}
}
return true;
}
} // namespace arm
} // namespace art
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