MoveEmitter-arm.h - mozsearch

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-

 * vim: set ts=8 sts=2 et sw=2 tw=80:

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef jit_arm_MoveEmitter_arm_h

#define jit_arm_MoveEmitter_arm_h

#include <stdint.h>

#include "jit/MoveResolver.h"

#include "jit/Registers.h"

namespace js {

namespace jit {

struct Address;

class MacroAssembler;

class MoveEmitterARM {

  uint32_t inCycle_;

  MacroAssembler& masm;

  // Original stack push value.

  uint32_t pushedAtStart_;

  // These store stack offsets to spill locations, snapshotting

  // codegen->framePushed_ at the time they were allocated. They are -1 if no

  // stack space has been allocated for that particular spill.

  int32_t pushedAtCycle_;

  int32_t pushedAtSpill_;

  // These are registers that are available for temporary use. They may be

  // assigned InvalidReg. If no corresponding spill space has been assigned,

  // then these registers do not need to be spilled.

  Register spilledReg_;

  FloatRegister spilledFloatReg_;

  void assertDone();

  Register tempReg();

  FloatRegister tempFloatReg();

  Address cycleSlot(uint32_t slot, uint32_t subslot) const;

  Address spillSlot() const;

  Address toAddress(const MoveOperand& operand) const;

  void emitMove(const MoveOperand& from, const MoveOperand& to);

  void emitFloat32Move(const MoveOperand& from, const MoveOperand& to);

  void emitDoubleMove(const MoveOperand& from, const MoveOperand& to);

  void breakCycle(const MoveOperand& from, const MoveOperand& to,

                  MoveOp::Type type, uint32_t slot);

  void completeCycle(const MoveOperand& from, const MoveOperand& to,

                     MoveOp::Type type, uint32_t slot);

  void emit(const MoveOp& move);

 public:

  explicit MoveEmitterARM(MacroAssembler& masm);

  ~MoveEmitterARM();

  void emit(const MoveResolver& moves);

  void finish();

  void setScratchRegister(Register reg) {}

};

typedef MoveEmitterARM MoveEmitter;

}  // namespace jit

}  // namespace js

#endif /* jit_arm_MoveEmitter_arm_h */