1 /*
2 * Copyright (c) 2018, 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 #ifndef CPU_X86_GC_SHARED_BARRIERSETASSEMBLER_X86_HPP
26 #define CPU_X86_GC_SHARED_BARRIERSETASSEMBLER_X86_HPP
27
28 #include "asm/macroAssembler.hpp"
29 #include "memory/allocation.hpp"
30 #include "oops/access.hpp"
31 #ifdef COMPILER2
32 #include "opto/optoreg.hpp"
33
34 class BarrierStubC2;
35 class Node;
36 #endif // COMPILER2
37 class InterpreterMacroAssembler;
38
39 class BarrierSetAssembler: public CHeapObj<mtGC> {
40 public:
41 virtual void arraycopy_prologue(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
42 Register src, Register dst, Register count) {}
43 virtual void arraycopy_epilogue(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
44 Register src, Register dst, Register count) {}
45
46 virtual void load_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
47 Register dst, Address src, Register tmp1, Register tmp_thread);
48 virtual void store_at(MacroAssembler* masm, DecoratorSet decorators, BasicType type,
49 Address dst, Register val, Register tmp1, Register tmp2, Register tmp3);
50
51 // The copy_[load/store]_at functions are used by arraycopy stubs. Be careful to only use
52 // r10 (aka rscratch1) in a context where restore_arg_regs_using_thread has been used instead
53 // of the looser setup_arg_regs. Currently this is done when using type T_OBJECT.
54 virtual void copy_load_at(MacroAssembler* masm,
55 DecoratorSet decorators,
56 BasicType type,
57 size_t bytes,
58 Register dst,
59 Address src,
60 Register tmp);
61
62 virtual void copy_store_at(MacroAssembler* masm,
63 DecoratorSet decorators,
64 BasicType type,
65 size_t bytes,
66 Address dst,
67 Register src,
68 Register tmp);
69
70 virtual void copy_load_at(MacroAssembler* masm,
71 DecoratorSet decorators,
72 BasicType type,
73 size_t bytes,
74 XMMRegister dst,
75 Address src,
76 Register tmp,
77 XMMRegister xmm_tmp);
78
79 virtual void copy_store_at(MacroAssembler* masm,
80 DecoratorSet decorators,
81 BasicType type,
82 size_t bytes,
83 Address dst,
84 XMMRegister src,
85 Register tmp1,
86 Register tmp2,
87 XMMRegister xmm_tmp);
88
89 virtual bool supports_avx3_masked_arraycopy() { return true; }
90
91 // Support for jniFastGetField to try resolving a jobject/jweak in native
92 virtual void try_resolve_jobject_in_native(MacroAssembler* masm, Register jni_env,
93 Register obj, Register tmp, Label& slowpath);
94
95 virtual void tlab_allocate(MacroAssembler* masm,
96 Register thread, Register obj,
97 Register var_size_in_bytes,
98 int con_size_in_bytes,
99 Register t1, Register t2,
100 Label& slow_case);
101
102 virtual void barrier_stubs_init() {}
103
104 virtual void nmethod_entry_barrier(MacroAssembler* masm, Label* slow_path, Label* continuation);
105 virtual void c2i_entry_barrier(MacroAssembler* masm);
106
107 virtual void check_oop(MacroAssembler* masm, Register obj, Register tmp1, Register tmp2, Label& error);
108
109 #ifdef COMPILER2
110 OptoReg::Name refine_register(const Node* node,
111 OptoReg::Name opto_reg);
112 #endif // COMPILER2
113 };
114
115 #ifdef COMPILER2
116
117 #ifdef _LP64
118
119 // This class saves and restores the registers that need to be preserved across
120 // the runtime call represented by a given C2 barrier stub. Use as follows:
121 // {
122 // SaveLiveRegisters save(masm, stub);
123 // ..
124 // __ call(RuntimeAddress(...);
125 // ..
126 // }
127 class SaveLiveRegisters {
128 private:
129 struct XMMRegisterData {
130 XMMRegister _reg;
131 int _size;
132
133 // Used by GrowableArray::find()
134 bool operator == (const XMMRegisterData& other) {
135 return _reg == other._reg;
136 }
137 };
138
139 MacroAssembler* const _masm;
140 GrowableArray<Register> _gp_registers;
141 GrowableArray<KRegister> _opmask_registers;
142 GrowableArray<XMMRegisterData> _xmm_registers;
143 int _spill_size;
144 int _spill_offset;
145
146 static int xmm_compare_register_size(XMMRegisterData* left, XMMRegisterData* right);
147 static int xmm_slot_size(OptoReg::Name opto_reg);
148 static uint xmm_ideal_reg_for_size(int reg_size);
149 bool xmm_needs_vzeroupper() const;
150 void xmm_register_save(const XMMRegisterData& reg_data);
151 void xmm_register_restore(const XMMRegisterData& reg_data);
152 void gp_register_save(Register reg);
153 void opmask_register_save(KRegister reg);
154 void gp_register_restore(Register reg);
155 void opmask_register_restore(KRegister reg);
156 void initialize(BarrierStubC2* stub);
157
158 public:
159 SaveLiveRegisters(MacroAssembler* masm, BarrierStubC2* stub);
160 ~SaveLiveRegisters();
161 };
162
163 #endif // _LP64
164
165 #endif // COMPILER2
166
167 #endif // CPU_X86_GC_SHARED_BARRIERSETASSEMBLER_X86_HPP