Mercurial > hg > truffle
comparison src/cpu/sparc/vm/stubRoutines_sparc.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | 9eba43136cb5 |
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1 /* | |
2 * Copyright 1997-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any 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 | |
30 // So unfortunately c2 will call with a pc from a frame object | |
31 // (already adjusted) and a raw pc (unadjusted), so we need to check both. | |
32 // It didn't use to be like this before adapter removal. | |
33 static bool returns_to_call_stub(address return_pc) { | |
34 return ((return_pc + frame::pc_return_offset) == _call_stub_return_address) || | |
35 (return_pc == _call_stub_return_address ); | |
36 } | |
37 | |
38 enum /* platform_dependent_constants */ { | |
39 // %%%%%%%% May be able to shrink this a lot | |
40 code_size1 = 20000, // simply increase if too small (assembler will crash if too small) | |
41 code_size2 = 20000 // simply increase if too small (assembler will crash if too small) | |
42 }; | |
43 | |
44 class Sparc { | |
45 friend class StubGenerator; | |
46 | |
47 public: | |
48 enum { nof_instance_allocators = 10 }; | |
49 | |
50 // allocator lock values | |
51 enum { | |
52 unlocked = 0, | |
53 locked = 1 | |
54 }; | |
55 | |
56 enum { | |
57 v8_oop_lock_ignore_bits = 2, | |
58 v8_oop_lock_bits = 4, | |
59 nof_v8_oop_lock_cache_entries = 1 << (v8_oop_lock_bits+v8_oop_lock_ignore_bits), | |
60 v8_oop_lock_mask = right_n_bits(v8_oop_lock_bits), | |
61 v8_oop_lock_mask_in_place = v8_oop_lock_mask << v8_oop_lock_ignore_bits | |
62 }; | |
63 | |
64 static int _v8_oop_lock_cache[nof_v8_oop_lock_cache_entries]; | |
65 | |
66 private: | |
67 static address _test_stop_entry; | |
68 static address _stop_subroutine_entry; | |
69 static address _flush_callers_register_windows_entry; | |
70 | |
71 static int _atomic_memory_operation_lock; | |
72 | |
73 static address _partial_subtype_check; | |
74 | |
75 public: | |
76 // %%% global lock for everyone who needs to use atomic_compare_and_exchange | |
77 // %%% or atomic_increment -- should probably use more locks for more | |
78 // %%% scalability-- for instance one for each eden space or group of | |
79 | |
80 // address of the lock for atomic_compare_and_exchange | |
81 static int* atomic_memory_operation_lock_addr() { return &_atomic_memory_operation_lock; } | |
82 | |
83 // accessor and mutator for _atomic_memory_operation_lock | |
84 static int atomic_memory_operation_lock() { return _atomic_memory_operation_lock; } | |
85 static void set_atomic_memory_operation_lock(int value) { _atomic_memory_operation_lock = value; } | |
86 | |
87 // test assembler stop routine by setting registers | |
88 static void (*test_stop_entry()) () { return CAST_TO_FN_PTR(void (*)(void), _test_stop_entry); } | |
89 | |
90 // a subroutine for debugging assembler code | |
91 static address stop_subroutine_entry_address() { return (address)&_stop_subroutine_entry; } | |
92 | |
93 // flushes (all but current) register window | |
94 static intptr_t* (*flush_callers_register_windows_func())() { return CAST_TO_FN_PTR(intptr_t* (*)(void), _flush_callers_register_windows_entry); } | |
95 | |
96 static address partial_subtype_check() { return _partial_subtype_check; } | |
97 }; |