/*

 * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#ifndef SHARE_OOPS_METHOD_INLINE_HPP

#define SHARE_OOPS_METHOD_INLINE_HPP

#include "oops/method.hpp"

#include "runtime/orderAccess.hpp"

inline address Method::from_compiled_entry() const {

  return OrderAccess::load_acquire(&_from_compiled_entry);

}

inline address Method::from_interpreted_entry() const {

  return OrderAccess::load_acquire(&_from_interpreted_entry);

}

inline void Method::set_method_data(MethodData* data) {

  // The store into method must be released. On platforms without

  // total store order (TSO) the reference may become visible before

  // the initialization of data otherwise.

  OrderAccess::release_store(&_method_data, data);

}

inline CompiledMethod* volatile Method::code() const {

  assert( check_code(), "" );

  return OrderAccess::load_acquire(&_code);

}

// Write (bci, line number) pair to stream

inline void CompressedLineNumberWriteStream::write_pair_regular(int bci_delta, int line_delta) {

  // bci and line number does not compress into single byte.

  // Write out escape character and use regular compression for bci and line number.

  write_byte((jubyte)0xFF);

  write_signed_int(bci_delta);

  write_signed_int(line_delta);

}

inline void CompressedLineNumberWriteStream::write_pair_inline(int bci, int line) {

  int bci_delta = bci - _bci;

  int line_delta = line - _line;

  _bci = bci;

  _line = line;

  // Skip (0,0) deltas - they do not add information and conflict with terminator.

  if (bci_delta == 0 && line_delta == 0) return;

  // Check if bci is 5-bit and line number 3-bit unsigned.

  if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) {

    // Compress into single byte.

    jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta;

    // Check that value doesn't match escape character.

    if (value != 0xFF) {

      write_byte(value);

      return;

    }

  }

  write_pair_regular(bci_delta, line_delta);

}

inline void CompressedLineNumberWriteStream::write_pair(int bci, int line) {

  write_pair_inline(bci, line);

}

inline bool Method::has_compiled_code() const { return code() != NULL; }

#endif // SHARE_OOPS_METHOD_INLINE_HPP