/*

 * Copyright (c) 1997, 2010, 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.

 *

 */

 public:

  // Sentinel placed in the code for interpreter returns so

  // that i2c adapters and osr code can recognize an interpreter

  // return address and convert the return to a specialized

  // block of code to handle compiedl return values and cleaning

  // the fpu stack.

  static const int return_sentinel;

  static Address::ScaleFactor stackElementScale() { return Address::times_4; }

  // Offset from rsp (which points to the last stack element)

  static int expr_offset_in_bytes(int i) { return stackElementSize * i; }

  // Stack index relative to tos (which points at value)

  static int expr_index_at(int i)        { return stackElementWords * i; }

  // Already negated by c++ interpreter

  static int local_index_at(int i) {

    assert(i <= 0, "local direction already negated");

    return stackElementWords * i;

  }