/* -*- 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_mips32_Bailouts_mips32_h
#define jit_mips32_Bailouts_mips32_h

#include "jit/Bailouts.h"

namespace js {
namespace jit {

class BailoutStack {
  uintptr_t frameClassId_;
  // This is pushed in the bailout handler. Both entry points into the
  // handler inserts their own value int lr, which is then placed onto the
  // stack along with frameClassId_ above. This should be migrated to ip.
 public:
  union {
    uintptr_t frameSize_;
    uintptr_t tableOffset_;
  };

 protected:
  RegisterDump::FPUArray fpregs_;
  RegisterDump::GPRArray regs_;

  uintptr_t snapshotOffset_;
  uintptr_t padding_;

 public:
  FrameSizeClass frameClass() const {
    return FrameSizeClass::FromClass(frameClassId_);
  }
  uintptr_t tableOffset() const {
    MOZ_ASSERT(frameClass() != FrameSizeClass::None());
    return tableOffset_;
  }
  uint32_t frameSize() const {
    if (frameClass() == FrameSizeClass::None()) {
      return frameSize_;
    }
    return frameClass().frameSize();
  }
  MachineState machine() { return MachineState::FromBailout(regs_, fpregs_); }
  SnapshotOffset snapshotOffset() const {
    MOZ_ASSERT(frameClass() == FrameSizeClass::None());
    return snapshotOffset_;
  }
  uint8_t* parentStackPointer() const {
    if (frameClass() == FrameSizeClass::None()) {
      return (uint8_t*)this + sizeof(BailoutStack);
    }
    return (uint8_t*)this + offsetof(BailoutStack, snapshotOffset_);
  }
  static size_t offsetOfFrameClass() {
    return offsetof(BailoutStack, frameClassId_);
  }
  static size_t offsetOfFrameSize() {
    return offsetof(BailoutStack, frameSize_);
  }
  static size_t offsetOfFpRegs() { return offsetof(BailoutStack, fpregs_); }
  static size_t offsetOfRegs() { return offsetof(BailoutStack, regs_); }
};

}  // namespace jit
}  // namespace js

#endif /* jit_mips32_Bailouts_mips32_h */