| // Copyright 2014 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef V8_COMPILER_GAP_RESOLVER_H_ |
| #define V8_COMPILER_GAP_RESOLVER_H_ |
| |
| #include "src/compiler/instruction.h" |
| |
| namespace v8 { |
| namespace internal { |
| namespace compiler { |
| |
| class GapResolver final { |
| public: |
| // Interface used by the gap resolver to emit moves and swaps. |
| class Assembler { |
| public: |
| virtual ~Assembler() {} |
| |
| // Assemble move. |
| virtual void AssembleMove(InstructionOperand* source, |
| InstructionOperand* destination) = 0; |
| // Assemble swap. |
| virtual void AssembleSwap(InstructionOperand* source, |
| InstructionOperand* destination) = 0; |
| }; |
| |
| explicit GapResolver(Assembler* assembler) |
| : assembler_(assembler), split_rep_(MachineRepresentation::kSimd128) {} |
| |
| // Resolve a set of parallel moves, emitting assembler instructions. |
| void Resolve(ParallelMove* parallel_move); |
| |
| private: |
| // Performs the given move, possibly performing other moves to unblock the |
| // destination operand. |
| void PerformMove(ParallelMove* moves, MoveOperands* move); |
| |
| // Assembler used to emit moves and save registers. |
| Assembler* const assembler_; |
| |
| // While resolving moves, the largest FP representation that can be moved. |
| // Any larger moves must be split into an equivalent series of moves of this |
| // representation. |
| MachineRepresentation split_rep_; |
| }; |
| |
| } // namespace compiler |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_COMPILER_GAP_RESOLVER_H_ |