1 /*
   2  * Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright (c) 2014, Red Hat Inc. 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_AARCH64_STUBROUTINES_AARCH64_HPP
  27 #define CPU_AARCH64_STUBROUTINES_AARCH64_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 // n.b. if we are notifying entry/exit to the simulator then the call
  34 // stub does a notify at normal return placing
  35 // call_stub_return_address one instruction beyond the notify. the
  36 // latter address is sued by the stack unwind code when doign an
  37 // exception return.
  38 static bool    returns_to_call_stub(address return_pc)   {
  39   return return_pc == _call_stub_return_address + (NotifySimulator ? -4 : 0);
  40 }
  41 
  42 enum platform_dependent_constants {
  43   code_size1 = 19000,          // simply increase if too small (assembler will crash if too small)
  44   code_size2 = 28000           // simply increase if too small (assembler will crash if too small)
  45 };
  46 
  47 class aarch64 {
  48  friend class StubGenerator;
  49 
  50  private:
  51   static address _get_previous_fp_entry;
  52   static address _get_previous_sp_entry;
  53 
  54   static address _f2i_fixup;
  55   static address _f2l_fixup;
  56   static address _d2i_fixup;
  57   static address _d2l_fixup;
  58 
  59   static address _float_sign_mask;
  60   static address _float_sign_flip;
  61   static address _double_sign_mask;
  62   static address _double_sign_flip;
  63 
  64   static address _zero_blocks;
  65 
  66   static address _has_negatives;
  67   static address _has_negatives_long;
  68   static address _large_array_equals;
  69   static address _compare_long_string_LL;
  70   static address _compare_long_string_LU;
  71   static address _compare_long_string_UL;
  72   static address _compare_long_string_UU;
  73   static address _string_indexof_linear_ll;
  74   static address _string_indexof_linear_uu;
  75   static address _string_indexof_linear_ul;
  76   static address _large_byte_array_inflate;
  77   static bool _completed;
  78 
  79  public:
  80 
  81   static address get_previous_fp_entry()
  82   {
  83     return _get_previous_fp_entry;
  84   }
  85 
  86   static address get_previous_sp_entry()
  87   {
  88     return _get_previous_sp_entry;
  89   }
  90 
  91   static address f2i_fixup()
  92   {
  93     return _f2i_fixup;
  94   }
  95 
  96   static address f2l_fixup()
  97   {
  98     return _f2l_fixup;
  99   }
 100 
 101   static address d2i_fixup()
 102   {
 103     return _d2i_fixup;
 104   }
 105 
 106   static address d2l_fixup()
 107   {
 108     return _d2l_fixup;
 109   }
 110 
 111   static address float_sign_mask()
 112   {
 113     return _float_sign_mask;
 114   }
 115 
 116   static address float_sign_flip()
 117   {
 118     return _float_sign_flip;
 119   }
 120 
 121   static address double_sign_mask()
 122   {
 123     return _double_sign_mask;
 124   }
 125 
 126   static address double_sign_flip()
 127   {
 128     return _double_sign_flip;
 129   }
 130 
 131   static address zero_blocks() {
 132     return _zero_blocks;
 133   }
 134 
 135   static address has_negatives() {
 136     return _has_negatives;
 137   }
 138 
 139   static address has_negatives_long() {
 140       return _has_negatives_long;
 141   }
 142 
 143   static address large_array_equals() {
 144       return _large_array_equals;
 145   }
 146 
 147   static address compare_long_string_LL() {
 148       return _compare_long_string_LL;
 149   }
 150 
 151   static address compare_long_string_LU() {
 152       return _compare_long_string_LU;
 153   }
 154 
 155   static address compare_long_string_UL() {
 156       return _compare_long_string_UL;
 157   }
 158 
 159   static address compare_long_string_UU() {
 160       return _compare_long_string_UU;
 161   }
 162 
 163   static address string_indexof_linear_ul() {
 164       return _string_indexof_linear_ul;
 165   }
 166 
 167   static address string_indexof_linear_ll() {
 168       return _string_indexof_linear_ll;
 169   }
 170 
 171   static address string_indexof_linear_uu() {
 172       return _string_indexof_linear_uu;
 173   }
 174 
 175   static address large_byte_array_inflate() {
 176       return _large_byte_array_inflate;
 177   }
 178 
 179   static bool complete() {
 180     return _completed;
 181   }
 182 
 183   static void set_completed() {
 184     _completed = true;
 185   }
 186 
 187 private:
 188   static juint    _crc_table[];
 189   static jubyte   _adler_table[];
 190   // begin trigonometric tables block. See comments in .cpp file
 191   static juint    _npio2_hw[];
 192   static jdouble   _two_over_pi[];
 193   static jdouble   _pio2[];
 194   static jdouble   _dsin_coef[];
 195   static jdouble  _dcos_coef[];
 196   // end trigonometric tables block
 197 };
 198 
 199 #endif // CPU_AARCH64_STUBROUTINES_AARCH64_HPP