| /* |
| * Copyright (C) 2017 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. |
| */ |
| |
| // Note: this include order may seem strange and is against the regular style. However it is the |
| // required order as nodes_shared does not have the right dependency chain and compilation |
| // will fail (as AsType on HInstruction will be defined before the full Instruction). |
| #include "nodes.h" |
| |
| #include "nodes_shared.h" |
| |
| #include "common_arm64.h" |
| |
| namespace art { |
| |
| using helpers::CanFitInShifterOperand; |
| |
| void HDataProcWithShifterOp::GetOpInfoFromInstruction(HInstruction* instruction, |
| /*out*/OpKind* op_kind, |
| /*out*/int* shift_amount) { |
| DCHECK(CanFitInShifterOperand(instruction)); |
| if (instruction->IsShl()) { |
| *op_kind = kLSL; |
| *shift_amount = instruction->AsShl()->GetRight()->AsIntConstant()->GetValue(); |
| } else if (instruction->IsShr()) { |
| *op_kind = kASR; |
| *shift_amount = instruction->AsShr()->GetRight()->AsIntConstant()->GetValue(); |
| } else if (instruction->IsUShr()) { |
| *op_kind = kLSR; |
| *shift_amount = instruction->AsUShr()->GetRight()->AsIntConstant()->GetValue(); |
| } else { |
| DCHECK(instruction->IsTypeConversion()); |
| Primitive::Type result_type = instruction->AsTypeConversion()->GetResultType(); |
| Primitive::Type input_type = instruction->AsTypeConversion()->GetInputType(); |
| int result_size = Primitive::ComponentSize(result_type); |
| int input_size = Primitive::ComponentSize(input_type); |
| int min_size = std::min(result_size, input_size); |
| if (result_type == Primitive::kPrimInt && input_type == Primitive::kPrimLong) { |
| // There is actually nothing to do. On ARM the high register from the |
| // pair will be ignored. On ARM64 the register will be used as a W |
| // register, discarding the top bits. This is represented by the |
| // default encoding 'LSL 0'. |
| *op_kind = kLSL; |
| *shift_amount = 0; |
| } else if (result_type == Primitive::kPrimChar || |
| (input_type == Primitive::kPrimChar && input_size < result_size)) { |
| *op_kind = kUXTH; |
| } else { |
| switch (min_size) { |
| case 1: *op_kind = kSXTB; break; |
| case 2: *op_kind = kSXTH; break; |
| case 4: *op_kind = kSXTW; break; |
| default: |
| LOG(FATAL) << "Unexpected min size " << min_size; |
| } |
| } |
| } |
| } |
| |
| std::ostream& operator<<(std::ostream& os, const HDataProcWithShifterOp::OpKind op) { |
| switch (op) { |
| case HDataProcWithShifterOp::kLSL: return os << "LSL"; |
| case HDataProcWithShifterOp::kLSR: return os << "LSR"; |
| case HDataProcWithShifterOp::kASR: return os << "ASR"; |
| case HDataProcWithShifterOp::kUXTB: return os << "UXTB"; |
| case HDataProcWithShifterOp::kUXTH: return os << "UXTH"; |
| case HDataProcWithShifterOp::kUXTW: return os << "UXTW"; |
| case HDataProcWithShifterOp::kSXTB: return os << "SXTB"; |
| case HDataProcWithShifterOp::kSXTH: return os << "SXTH"; |
| case HDataProcWithShifterOp::kSXTW: return os << "SXTW"; |
| default: |
| LOG(FATAL) << "Invalid OpKind " << static_cast<int>(op); |
| UNREACHABLE(); |
| } |
| } |
| |
| } // namespace art |