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Datei: stubRoutines_ppc.hpp Sprache: C

/*
* Copyright (c) 2002, 2019, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2012, 2019 SAP SE. 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 CPU_PPC_STUBROUTINES_PPC_HPP
#define CPU_PPC_STUBROUTINES_PPC_HPP

// This file holds the platform specific parts of the StubRoutines
// definition. See stubRoutines.hpp for a description on how to
// extend it.

static bool returns_to_call_stub(address return_pc) { return return_pc == _call_stub_return_address; }

enum platform_dependent_constants {
  code_size1 = 20000,          // simply increase if too small (assembler will crash if too small)
  code_size2 = 24000           // simply increase if too small (assembler will crash if too small)
};

// CRC32 Intrinsics.
#define CRC32_TABLE_SIZE (4 * 256)
#define REVERSE_CRC32_POLY  0xEDB88320
#define REVERSE_CRC32C_POLY 0x82F63B78
#define INVERSE_REVERSE_CRC32_POLY  0x1aab14226ull
#define INVERSE_REVERSE_CRC32C_POLY 0x105fd79bdull
#define CRC32_UNROLL_FACTOR 2048
#define CRC32_UNROLL_FACTOR2 8

class ppc {
  friend class StubGenerator;

private:
  static address _nmethod_entry_barrier;

public:
  static address nmethod_entry_barrier();

  static address generate_crc_constants(juint reverse_poly);
};

#endif // CPU_PPC_STUBROUTINES_PPC_HPP

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