1 /*
   2  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 // This file holds the platform specific parts of the StubRoutines
  26 // definition. See stubRoutines.hpp for a description on how to
  27 // extend it.
  28 
  29 static bool    returns_to_call_stub(address return_pc)   { return return_pc == _call_stub_return_address; }
  30 
  31 enum platform_dependent_constants {
  32   code_size1 = 19000,          // simply increase if too small (assembler will crash if too small)
  33   code_size2 = 22000           // simply increase if too small (assembler will crash if too small)
  34 };
  35 
  36 // MethodHandles adapters
  37 enum method_handles_platform_dependent_constants {
  38   method_handles_adapters_code_size = 40000
  39 };
  40 
  41 class x86 {
  42  friend class StubGenerator;
  43 
  44  private:
  45   static address _get_previous_fp_entry;
  46   static address _verify_mxcsr_entry;
  47 
  48   static address _f2i_fixup;
  49   static address _f2l_fixup;
  50   static address _d2i_fixup;
  51   static address _d2l_fixup;
  52 
  53   static address _float_sign_mask;
  54   static address _float_sign_flip;
  55   static address _double_sign_mask;
  56   static address _double_sign_flip;
  57   static address _mxcsr_std;
  58 
  59  public:
  60 
  61   static address get_previous_fp_entry()
  62   {
  63     return _get_previous_fp_entry;
  64   }
  65 
  66   static address verify_mxcsr_entry()
  67   {
  68     return _verify_mxcsr_entry;
  69   }
  70 
  71   static address f2i_fixup()
  72   {
  73     return _f2i_fixup;
  74   }
  75 
  76   static address f2l_fixup()
  77   {
  78     return _f2l_fixup;
  79   }
  80 
  81   static address d2i_fixup()
  82   {
  83     return _d2i_fixup;
  84   }
  85 
  86   static address d2l_fixup()
  87   {
  88     return _d2l_fixup;
  89   }
  90 
  91   static address float_sign_mask()
  92   {
  93     return _float_sign_mask;
  94   }
  95 
  96   static address float_sign_flip()
  97   {
  98     return _float_sign_flip;
  99   }
 100 
 101   static address double_sign_mask()
 102   {
 103     return _double_sign_mask;
 104   }
 105 
 106   static address double_sign_flip()
 107   {
 108     return _double_sign_flip;
 109   }
 110 
 111   static address mxcsr_std()
 112   {
 113     return _mxcsr_std;
 114   }
 115 };