1 /*
2 * Copyright 1997-2010 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 specializes the assember with interpreter-specific macros
26
27 REGISTER_DECLARATION( Register, Otos_i , O0); // tos for ints, etc
28 REGISTER_DECLARATION( Register, Otos_l , O0); // for longs
29 REGISTER_DECLARATION( Register, Otos_l1, O0); // for 1st part of longs
30 REGISTER_DECLARATION( Register, Otos_l2, O1); // for 2nd part of longs
31 REGISTER_DECLARATION(FloatRegister, Ftos_f , F0); // for floats
32 REGISTER_DECLARATION(FloatRegister, Ftos_d , F0); // for doubles
33 REGISTER_DECLARATION(FloatRegister, Ftos_d1, F0); // for 1st part of double
34 REGISTER_DECLARATION(FloatRegister, Ftos_d2, F1); // for 2nd part of double
35
36 #ifndef DONT_USE_REGISTER_DEFINES
37 #define Otos_i O0
38 #define Otos_l O0
39 #define Otos_l1 O0
40 #define Otos_l2 O1
41 #define Ftos_f F0
42 #define Ftos_d F0
43 #define Ftos_d1 F0
44 #define Ftos_d2 F1
45 #endif // DONT_USE_REGISTER_DEFINES
46
47 class InterpreterMacroAssembler: public MacroAssembler {
48 protected:
49 #ifndef CC_INTERP
50 // Interpreter specific version of call_VM_base
51 virtual void call_VM_leaf_base(
52 Register java_thread,
53 address entry_point,
54 int number_of_arguments
55 );
56
57 virtual void call_VM_base(
58 Register oop_result,
59 Register java_thread,
60 Register last_java_sp,
61 address entry_point,
62 int number_of_arguments,
63 bool check_exception=true
64 );
65
66 virtual void check_and_handle_popframe(Register java_thread);
67 virtual void check_and_handle_earlyret(Register java_thread);
68
69 // base routine for all dispatches
70 void dispatch_base(TosState state, address* table);
71 #endif /* CC_INTERP */
72
73 public:
74 InterpreterMacroAssembler(CodeBuffer* c)
75 : MacroAssembler(c) {}
76
77 #ifndef CC_INTERP
78 virtual void load_earlyret_value(TosState state);
79
80 static const Address l_tmp ;
81 static const Address d_tmp ;
82 #endif /* CC_INTERP */
83
84 // helper routine for frame allocation/deallocation
85 // compute the delta by which the caller's SP has to
86 // be adjusted to accomodate for the non-argument
87 // locals
88 void compute_extra_locals_size_in_bytes(Register args_size, Register locals_size, Register delta);
89
90 #ifndef CC_INTERP
91
92 // dispatch routines
93 void dispatch_prolog(TosState state, int step = 0);
94 void dispatch_epilog(TosState state, int step = 0);
95 void dispatch_only(TosState state);
96 void dispatch_normal(TosState state);
97 void dispatch_next(TosState state, int step = 0);
98 void dispatch_next_noverify_oop(TosState state, int step = 0);
99 void dispatch_via (TosState state, address* table);
100
101
102 // Removes the current activation (incl. unlocking of monitors).
103 // Additionally this code is used for earlyReturn in which case we
104 // want to skip throwing an exception and installing an exception.
105 void remove_activation(TosState state,
106 bool throw_monitor_exception = true,
107 bool install_monitor_exception = true);
108
109 protected:
110 void dispatch_Lbyte_code(TosState state, address* table, int bcp_incr = 0, bool verify = true);
111 #endif /* CC_INTERP */
112
113 public:
114 // Super call_VM calls - correspond to MacroAssembler::call_VM(_leaf) calls
115 void super_call_VM(Register thread_cache,
116 Register oop_result,
117 Register last_java_sp,
118 address entry_point,
119 Register arg_1,
120 Register arg_2,
121 bool check_exception = true);
122
123 #ifndef CC_INTERP
124 void super_call_VM_leaf(Register thread_cache, address entry_point, Register arg_1, Register arg_2);
125
126 // Generate a subtype check: branch to ok_is_subtype if sub_klass is
127 // a subtype of super_klass. Blows registers tmp1, tmp2 and tmp3.
128 void gen_subtype_check( Register sub_klass, Register super_klass, Register tmp1, Register tmp2, Register tmp3, Label &ok_is_subtype );
129
130 // helpers for tossing exceptions
131 void throw_if_not_1_icc( Condition ok_condition, Label& ok );
132 void throw_if_not_1_xcc( Condition ok_condition, Label& ok );
133 void throw_if_not_1_x ( Condition ok_condition, Label& ok ); // chooses icc or xcc based on _LP64
134
135 void throw_if_not_2( address throw_entry_point, Register Rscratch, Label& ok);
136
137 void throw_if_not_icc( Condition ok_condition, address throw_entry_point, Register Rscratch );
138 void throw_if_not_xcc( Condition ok_condition, address throw_entry_point, Register Rscratch );
139 void throw_if_not_x ( Condition ok_condition, address throw_entry_point, Register Rscratch );
140
141 // helpers for expression stack
142
143 void pop_i( Register r = Otos_i);
144 void pop_ptr( Register r = Otos_i, Register scratch = O4);
145 void pop_l( Register r = Otos_l1);
146 // G4_scratch and Lscratch are used at call sites!!
147 void pop_f(FloatRegister f = Ftos_f, Register scratch = G1_scratch);
148 void pop_d(FloatRegister f = Ftos_d1, Register scratch = G1_scratch);
149
150 void push_i( Register r = Otos_i);
151 void push_ptr( Register r = Otos_i);
152 void push_ptr( Register r, Register tag);
153 void push_l( Register r = Otos_l1);
154 void push_f(FloatRegister f = Ftos_f);
155 void push_d(FloatRegister f = Ftos_d1);
156
157
158 void pop (TosState state); // transition vtos -> state
159 void push(TosState state); // transition state -> vtos
160 void empty_expression_stack(); // resets both Lesp and SP
161
162 // Support for Tagged Stacks
163 void tag_stack(frame::Tag t, Register r);
164 void tag_stack(Register tag);
165 void tag_local(frame::Tag t, Register src, Register base, int n = 0);
166
167 #ifdef ASSERT
168 void verify_sp(Register Rsp, Register Rtemp);
169 void verify_esp(Register Resp); // verify that Lesp points to a word in the temp stack
170
171 void verify_stack_tag(frame::Tag t, Register r, Register scratch = G0);
172 void verify_local_tag(frame::Tag t, Register base, Register scr, int n = 0);
173 #endif // ASSERT
174
175 public:
176 void if_cmp(Condition cc, bool ptr_compare);
177
178 // Load values from bytecode stream:
179
180 enum signedOrNot { Signed, Unsigned };
181 enum setCCOrNot { set_CC, dont_set_CC };
182
183 void get_2_byte_integer_at_bcp( int bcp_offset,
184 Register Rtmp,
185 Register Rdst,
186 signedOrNot is_signed,
187 setCCOrNot should_set_CC = dont_set_CC );
188
189 void get_4_byte_integer_at_bcp( int bcp_offset,
190 Register Rtmp,
191 Register Rdst,
192 setCCOrNot should_set_CC = dont_set_CC );
193
194 void get_cache_and_index_at_bcp(Register cache, Register tmp, int bcp_offset, bool giant_index = false);
195 void get_cache_entry_pointer_at_bcp(Register cache, Register tmp, int bcp_offset, bool giant_index = false);
196 void get_cache_index_at_bcp(Register cache, Register tmp, int bcp_offset, bool giant_index = false);
197
198
199 // common code
200
201 void field_offset_at(int n, Register tmp, Register dest, Register base);
202 int field_offset_at(Register object, address bcp, int offset);
203 void fast_iaaccess(int n, address bcp);
204 void fast_iagetfield(address bcp);
205 void fast_iaputfield(address bcp, bool do_store_check );
206
207 void index_check(Register array, Register index, int index_shift, Register tmp, Register res);
208 void index_check_without_pop(Register array, Register index, int index_shift, Register tmp, Register res);
209
210 void get_constant_pool(Register Rdst);
211 void get_constant_pool_cache(Register Rdst);
212 void get_cpool_and_tags(Register Rcpool, Register Rtags);
213 void is_a(Label& L);
214
215 // Load compiled (i2c) or interpreter entry and call from interpreted
216 void call_from_interpreter(Register target, Register scratch, Register Rret);
217
218 // --------------------------------------------------
219
220 void unlock_if_synchronized_method(TosState state, bool throw_monitor_exception = true, bool install_monitor_exception = true);
221
222 void add_monitor_to_stack( bool stack_is_empty,
223 Register Rtemp,
224 Register Rtemp2 );
225
226 // Load/store aligned in _LP64 but unaligned otherwise
227 // These only apply to the Interpreter expression stack and locals!
228 void load_unaligned_double(Register r1, int offset, FloatRegister d);
229 void store_unaligned_double(FloatRegister d, Register r1, int offset );
230
231 // Load/store aligned in _LP64 but unaligned otherwise
232 void load_unaligned_long(Register r1, int offset, Register d);
233 void store_unaligned_long(Register d, Register r1, int offset );
234
235 void access_local_int( Register index, Register dst );
236 void access_local_ptr( Register index, Register dst );
237 void access_local_returnAddress( Register index, Register dst );
238 void access_local_long( Register index, Register dst );
239 void access_local_float( Register index, FloatRegister dst );
240 void access_local_double( Register index, FloatRegister dst );
241 #ifdef ASSERT
242 void check_for_regarea_stomp( Register Rindex, int offset, Register Rlimit, Register Rscratch, Register Rscratch1);
243 #endif // ASSERT
244 void store_local_int( Register index, Register src );
245 void store_local_ptr( Register index, Register src, Register tag = Otos_l2 );
246 void store_local_ptr( int n, Register src, Register tag = Otos_l2 );
247 void store_local_long( Register index, Register src );
248 void store_local_float( Register index, FloatRegister src );
249 void store_local_double( Register index, FloatRegister src );
250
251 // Tagged stack helpers for swap and dup
252 void load_ptr_and_tag(int n, Register val, Register tag);
253 void store_ptr_and_tag(int n, Register val, Register tag);
254
255 // Tagged stack helper for getting receiver in register.
256 void load_receiver(Register param_count, Register recv);
257
258 static int top_most_monitor_byte_offset(); // offset in bytes to top of monitor block
259 Address top_most_monitor();
260 void compute_stack_base( Register Rdest );
261
262 #endif /* CC_INTERP */
263 void increment_invocation_counter( Register Rtmp, Register Rtmp2 );
264 void increment_backedge_counter( Register Rtmp, Register Rtmp2 );
265 #ifndef CC_INTERP
266 void test_backedge_count_for_osr( Register backedge_count, Register branch_bcp, Register Rtmp );
267
268 #endif /* CC_INTERP */
269 // Object locking
270 void lock_object (Register lock_reg, Register obj_reg);
271 void unlock_object(Register lock_reg);
272
273 #ifndef CC_INTERP
274 // Interpreter profiling operations
275 void set_method_data_pointer() { set_method_data_pointer_offset(noreg); }
276 void set_method_data_pointer_for_bcp();
277 void set_method_data_pointer_offset(Register mdi_reg);
278 void test_method_data_pointer(Label& zero_continue);
279 void verify_method_data_pointer();
280 void test_invocation_counter_for_mdp(Register invocation_count, Register cur_bcp, Register Rtmp, Label &profile_continue);
281
282 void set_mdp_data_at(int constant, Register value);
283 void increment_mdp_data_at(Address counter, Register bumped_count,
284 bool decrement = false);
285 void increment_mdp_data_at(int constant, Register bumped_count,
286 bool decrement = false);
287 void increment_mdp_data_at(Register reg, int constant,
288 Register bumped_count, Register scratch2,
289 bool decrement = false);
290 void set_mdp_flag_at(int flag_constant, Register scratch);
291 void test_mdp_data_at(int offset, Register value, Label& not_equal_continue,
292 Register scratch);
293
294 void record_klass_in_profile(Register receiver, Register scratch, bool is_virtual_call);
295 void record_klass_in_profile_helper(Register receiver, Register scratch,
296 int start_row, Label& done, bool is_virtual_call);
297
298 void update_mdp_by_offset(int offset_of_disp, Register scratch);
299 void update_mdp_by_offset(Register reg, int offset_of_disp,
300 Register scratch);
301 void update_mdp_by_constant(int constant);
302 void update_mdp_for_ret(TosState state, Register return_bci);
303
304 void profile_taken_branch(Register scratch, Register bumped_count);
305 void profile_not_taken_branch(Register scratch);
306 void profile_call(Register scratch);
307 void profile_final_call(Register scratch);
308 void profile_virtual_call(Register receiver, Register scratch, bool receiver_can_be_null = false);
309 void profile_ret(TosState state, Register return_bci, Register scratch);
310 void profile_null_seen(Register scratch);
311 void profile_typecheck(Register klass, Register scratch);
312 void profile_typecheck_failed(Register scratch);
313 void profile_switch_default(Register scratch);
314 void profile_switch_case(Register index,
315 Register scratch1,
316 Register scratch2,
317 Register scratch3);
318
319 // Debugging
320 void interp_verify_oop(Register reg, TosState state, const char * file, int line); // only if +VerifyOops && state == atos
321 void verify_oop_or_return_address(Register reg, Register rtmp); // for astore
322 void verify_FPU(int stack_depth, TosState state = ftos); // only if +VerifyFPU && (state == ftos || state == dtos)
323
324 #endif /* CC_INTERP */
325 // support for JVMTI/Dtrace
326 typedef enum { NotifyJVMTI, SkipNotifyJVMTI } NotifyMethodExitMode;
327 void notify_method_entry();
328 void notify_method_exit(
329 bool save_result, TosState state, NotifyMethodExitMode mode);
330
331 void save_return_value(TosState state, bool is_native_call);
332 void restore_return_value(TosState state, bool is_native_call);
333 };