1 /*
   2  * Copyright (c) 2002, 2017, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright (c) 2012, 2017, SAP SE. All rights reserved.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #ifndef CPU_PPC_VM_STUBROUTINES_PPC_HPP
  27 #define CPU_PPC_VM_STUBROUTINES_PPC_HPP
  28 
  29 // This file holds the platform specific parts of the StubRoutines
  30 // definition. See stubRoutines.hpp for a description on how to
  31 // extend it.
  32 
  33 static bool returns_to_call_stub(address return_pc) { return return_pc == _call_stub_return_address; }
  34 
  35 enum platform_dependent_constants {
  36   code_size1 = 20000,          // simply increase if too small (assembler will crash if too small)
  37   code_size2 = 22000           // simply increase if too small (assembler will crash if too small)
  38 };
  39 
  40 // CRC32 Intrinsics.
  41 #define CRC32_COLUMN_SIZE 256
  42 #define CRC32_BYFOUR
  43 #ifdef  CRC32_BYFOUR
  44   #define CRC32_TABLES 8
  45 #else
  46   #define CRC32_TABLES 1
  47 #endif
  48 #define CRC32_CONSTANTS_SIZE 1084
  49 #define CRC32_BARRET_CONSTANTS 10
  50 
  51 class ppc64 {
  52  friend class StubGenerator;
  53 
  54  private:
  55 
  56   // CRC32 Intrinsics.
  57   static juint _crc_table[CRC32_TABLES][CRC32_COLUMN_SIZE];
  58   static juint _crc32c_table[CRC32_TABLES][CRC32_COLUMN_SIZE];
  59   static juint* _constants;
  60   static juint* _barret_constants;
  61 
  62  public:
  63 
  64   // CRC32 Intrinsics.
  65   static void generate_load_table_addr(MacroAssembler* masm, Register table, address table_addr, uint64_t table_contents);
  66   static void generate_load_crc_table_addr(MacroAssembler* masm, Register table);
  67   static void generate_load_crc32c_table_addr(MacroAssembler* masm, Register table);
  68   static void generate_load_crc_constants_addr(MacroAssembler* masm, Register table);
  69   static void generate_load_crc_barret_constants_addr(MacroAssembler* masm, Register table);
  70   static juint* generate_crc_constants();
  71   static juint* generate_crc_barret_constants();
  72 
  73 };
  74 
  75 #endif // CPU_PPC_VM_STUBROUTINES_PPC_HPP