// 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_BACKEND_GAP_RESOLVER_H_ #define V8_COMPILER_BACKEND_GAP_RESOLVER_H_ #include "src/compiler/backend/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() = default; // 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. V8_EXPORT_PRIVATE 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_BACKEND_GAP_RESOLVER_H_