stubRoutines_sparc.hpp revision 1879:f95d63e2154a 
1/*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 * This code is free software; you can redistribute it and/or modify it
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7 * published by the Free Software Foundation.
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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
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14 *
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23 */
24
25#ifndef CPU_SPARC_VM_STUBROUTINES_SPARC_HPP
26#define CPU_SPARC_VM_STUBROUTINES_SPARC_HPP
27
28// This file holds the platform specific parts of the StubRoutines
29// definition. See stubRoutines.hpp for a description on how to
30// extend it.
31
32
33// So unfortunately c2 will call with a pc from a frame object
34// (already adjusted) and a raw pc (unadjusted), so we need to check both.
35// It didn't use to be like this before adapter removal.
36static bool returns_to_call_stub(address return_pc)   {
37  return ((return_pc + frame::pc_return_offset) == _call_stub_return_address) ||
38          (return_pc == _call_stub_return_address );
39}
40
41enum /* platform_dependent_constants */ {
42  // %%%%%%%% May be able to shrink this a lot
43  code_size1 = 20000,           // simply increase if too small (assembler will crash if too small)
44  code_size2 = 20000            // simply increase if too small (assembler will crash if too small)
45};
46
47// MethodHandles adapters
48enum method_handles_platform_dependent_constants {
49  method_handles_adapters_code_size = 15000
50};
51
52class Sparc {
53 friend class StubGenerator;
54
55 public:
56  enum { nof_instance_allocators = 10 };
57
58  // allocator lock values
59  enum {
60    unlocked = 0,
61    locked   = 1
62  };
63
64  enum {
65    v8_oop_lock_ignore_bits = 2,
66    v8_oop_lock_bits = 4,
67    nof_v8_oop_lock_cache_entries = 1 << (v8_oop_lock_bits+v8_oop_lock_ignore_bits),
68    v8_oop_lock_mask = right_n_bits(v8_oop_lock_bits),
69    v8_oop_lock_mask_in_place = v8_oop_lock_mask << v8_oop_lock_ignore_bits
70  };
71
72  static int _v8_oop_lock_cache[nof_v8_oop_lock_cache_entries];
73
74 private:
75  static address _test_stop_entry;
76  static address _stop_subroutine_entry;
77  static address _flush_callers_register_windows_entry;
78
79  static int _atomic_memory_operation_lock;
80
81  static address _partial_subtype_check;
82
83 public:
84  // %%% global lock for everyone who needs to use atomic_compare_and_exchange
85  // %%% or atomic_increment -- should probably use more locks for more
86  // %%% scalability-- for instance one for each eden space or group of
87
88  // address of the lock for atomic_compare_and_exchange
89  static int* atomic_memory_operation_lock_addr() { return &_atomic_memory_operation_lock; }
90
91  // accessor and mutator for _atomic_memory_operation_lock
92  static int atomic_memory_operation_lock() { return _atomic_memory_operation_lock; }
93  static void set_atomic_memory_operation_lock(int value) { _atomic_memory_operation_lock = value; }
94
95  // test assembler stop routine by setting registers
96  static void (*test_stop_entry()) ()                     { return CAST_TO_FN_PTR(void (*)(void), _test_stop_entry); }
97
98  // a subroutine for debugging assembler code
99  static address stop_subroutine_entry_address()          { return (address)&_stop_subroutine_entry; }
100
101  // flushes (all but current) register window
102  static intptr_t* (*flush_callers_register_windows_func())() { return CAST_TO_FN_PTR(intptr_t* (*)(void), _flush_callers_register_windows_entry); }
103
104  static address partial_subtype_check()                  { return _partial_subtype_check; }
105};
106
107#endif // CPU_SPARC_VM_STUBROUTINES_SPARC_HPP
108