1 /*
   2  * Copyright (c) 2003, 2011, 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_VM_STUBROUTINES_AARCH64_HPP
  27 #define CPU_AARCH64_VM_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 = 22000           // 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   static bool _completed;
  66 
  67  public:
  68 
  69   static address get_previous_fp_entry()
  70   {
  71     return _get_previous_fp_entry;
  72   }
  73 
  74   static address get_previous_sp_entry()
  75   {
  76     return _get_previous_sp_entry;
  77   }
  78 
  79   static address f2i_fixup()
  80   {
  81     return _f2i_fixup;
  82   }
  83 
  84   static address f2l_fixup()
  85   {
  86     return _f2l_fixup;
  87   }
  88 
  89   static address d2i_fixup()
  90   {
  91     return _d2i_fixup;
  92   }
  93 
  94   static address d2l_fixup()
  95   {
  96     return _d2l_fixup;
  97   }
  98 
  99   static address float_sign_mask()
 100   {
 101     return _float_sign_mask;
 102   }
 103 
 104   static address float_sign_flip()
 105   {
 106     return _float_sign_flip;
 107   }
 108 
 109   static address double_sign_mask()
 110   {
 111     return _double_sign_mask;
 112   }
 113 
 114   static address double_sign_flip()
 115   {
 116     return _double_sign_flip;
 117   }
 118 
 119   static address zero_blocks() {
 120     return _zero_blocks;
 121   }
 122 
 123   static bool complete() {
 124     return _completed;
 125   }
 126 
 127   static void set_completed() {
 128     _completed = true;
 129   }
 130 
 131 private:
 132   static juint    _crc_table[];
 133 
 134 };
 135 
 136 #endif // CPU_AARCH64_VM_STUBROUTINES_AARCH64_HPP