Fri, 25 Mar 2011 09:35:39 +0100
7029017: Additional architecture support for c2 compiler
Summary: Enables cross building of a c2 VM. Support masking of shift counts when the processor architecture mandates it.
Reviewed-by: kvn, never
1 /*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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25 #ifndef CPU_SPARC_VM_STUBROUTINES_SPARC_HPP
26 #define CPU_SPARC_VM_STUBROUTINES_SPARC_HPP
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.
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.
36 static 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 }
41 enum /* 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 };
47 // MethodHandles adapters
48 enum method_handles_platform_dependent_constants {
49 method_handles_adapters_code_size = 15000
50 };
52 class Sparc {
53 friend class StubGenerator;
55 public:
56 enum { nof_instance_allocators = 10 };
58 // allocator lock values
59 enum {
60 unlocked = 0,
61 locked = 1
62 };
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 };
72 static int _v8_oop_lock_cache[nof_v8_oop_lock_cache_entries];
74 private:
75 static address _test_stop_entry;
76 static address _stop_subroutine_entry;
77 static address _flush_callers_register_windows_entry;
79 static int _atomic_memory_operation_lock;
81 static address _partial_subtype_check;
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
88 // address of the lock for atomic_compare_and_exchange
89 static int* atomic_memory_operation_lock_addr() { return &_atomic_memory_operation_lock; }
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; }
95 // test assembler stop routine by setting registers
96 static void (*test_stop_entry()) () { return CAST_TO_FN_PTR(void (*)(void), _test_stop_entry); }
98 // a subroutine for debugging assembler code
99 static address stop_subroutine_entry_address() { return (address)&_stop_subroutine_entry; }
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); }
104 static address partial_subtype_check() { return _partial_subtype_check; }
105 };
107 #endif // CPU_SPARC_VM_STUBROUTINES_SPARC_HPP