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