src/cpu/x86/vm/interp_masm_x86_64.hpp - platform/external/jetbrains/jdk8u_hotspot - Git at Google

 /*
  * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */

 #ifndef CC_INTERP
  protected:
   // Interpreter specific version of call_VM_base
   virtual void call_VM_leaf_base(address entry_point,
                                  int number_of_arguments);

   virtual void call_VM_base(Register oop_result,
                             Register java_thread,
                             Register last_java_sp,
                             address  entry_point,
                             int number_of_arguments,
                             bool check_exceptions);

   virtual void check_and_handle_popframe(Register java_thread);
   virtual void check_and_handle_earlyret(Register java_thread);

   // base routine for all dispatches
   void dispatch_base(TosState state, address* table, bool verifyoop = true);
 #endif // CC_INTERP

  public:
   InterpreterMacroAssembler(CodeBuffer* code) : MacroAssembler(code), _locals_register(r14), _bcp_register(r13) {}

   void load_earlyret_value(TosState state);

 #ifdef CC_INTERP
   void save_bcp()                                          { /*  not needed in c++ interpreter and harmless */ }
   void restore_bcp()                                       { /*  not needed in c++ interpreter and harmless */ }

   // Helpers for runtime call arguments/results
   void get_method(Register reg);

 #else

   // Interpreter-specific registers
   void save_bcp() {
     movptr(Address(rbp, frame::interpreter_frame_bcx_offset * wordSize), r13);
   }

   void restore_bcp() {
     movptr(r13, Address(rbp, frame::interpreter_frame_bcx_offset * wordSize));
   }

   void restore_locals() {
     movptr(r14, Address(rbp, frame::interpreter_frame_locals_offset * wordSize));
   }

   // Helpers for runtime call arguments/results
   void get_method(Register reg) {
     movptr(reg, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
   }

   void get_const(Register reg) {
     get_method(reg);
     movptr(reg, Address(reg, Method::const_offset()));
   }

   void get_constant_pool(Register reg) {
     get_const(reg);
     movptr(reg, Address(reg, ConstMethod::constants_offset()));
   }

   void get_constant_pool_cache(Register reg) {
     get_constant_pool(reg);
     movptr(reg, Address(reg, ConstantPool::cache_offset_in_bytes()));
   }

   void get_cpool_and_tags(Register cpool, Register tags) {
     get_constant_pool(cpool);
     movptr(tags, Address(cpool, ConstantPool::tags_offset_in_bytes()));
   }

   void get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset);
   void get_cache_and_index_at_bcp(Register cache, Register index, int bcp_offset, size_t index_size = sizeof(u2));
   void get_cache_and_index_and_bytecode_at_bcp(Register cache, Register index, Register bytecode, int byte_no, int bcp_offset, size_t index_size = sizeof(u2));
   void get_cache_entry_pointer_at_bcp(Register cache, Register tmp, int bcp_offset, size_t index_size = sizeof(u2));
   void get_cache_index_at_bcp(Register index, int bcp_offset, size_t index_size = sizeof(u2));
   void get_method_counters(Register method, Register mcs, Label& skip);

   // load cpool->resolved_references(index);
   void load_resolved_reference_at_index(Register result, Register index);

   void pop_ptr(Register r = rax);
   void pop_i(Register r = rax);
   void pop_l(Register r = rax);
   void pop_f(XMMRegister r = xmm0);
   void pop_d(XMMRegister r = xmm0);
   void push_ptr(Register r = rax);
   void push_i(Register r = rax);
   void push_l(Register r = rax);
   void push_f(XMMRegister r = xmm0);
   void push_d(XMMRegister r = xmm0);

   void pop(Register r ) { ((MacroAssembler*)this)->pop(r); }

   void push(Register r ) { ((MacroAssembler*)this)->push(r); }
   void push(int32_t imm ) { ((MacroAssembler*)this)->push(imm); }

   void pop(TosState state); // transition vtos -> state
   void push(TosState state); // transition state -> vtos

   void empty_expression_stack() {
     movptr(rsp, Address(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize));
     // NULL last_sp until next java call
     movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
   }

   // Helpers for swap and dup
   void load_ptr(int n, Register val);
   void store_ptr(int n, Register val);

   // Generate a subtype check: branch to ok_is_subtype if sub_klass is
   // a subtype of super_klass.
   void gen_subtype_check( Register sub_klass, Label &ok_is_subtype );

   // Dispatching
   void dispatch_prolog(TosState state, int step = 0);
   void dispatch_epilog(TosState state, int step = 0);
   // dispatch via ebx (assume ebx is loaded already)
   void dispatch_only(TosState state);
   // dispatch normal table via ebx (assume ebx is loaded already)
   void dispatch_only_normal(TosState state);
   void dispatch_only_noverify(TosState state);
   // load ebx from [esi + step] and dispatch via ebx
   void dispatch_next(TosState state, int step = 0);
   // load ebx from [esi] and dispatch via ebx and table
   void dispatch_via (TosState state, address* table);

   // jump to an invoked target
   void prepare_to_jump_from_interpreted();
   void jump_from_interpreted(Register method, Register temp);


   // Returning from interpreted functions
   //
   // Removes the current activation (incl. unlocking of monitors)
   // and sets up the return address.  This code is also used for
   // exception unwindwing. In that case, we do not want to throw
   // IllegalMonitorStateExceptions, since that might get us into an
   // infinite rethrow exception loop.
   // Additionally this code is used for popFrame and earlyReturn.
   // In popFrame case we want to skip throwing an exception,
   // installing an exception, and notifying jvmdi.
   // In earlyReturn case we only want to skip throwing an exception
   // and installing an exception.
   void remove_activation(TosState state, Register ret_addr,
                          bool throw_monitor_exception = true,
                          bool install_monitor_exception = true,
                          bool notify_jvmdi = true);
 #endif // CC_INTERP

   // Object locking
   void lock_object  (Register lock_reg);
   void unlock_object(Register lock_reg);

 #ifndef CC_INTERP

   // Interpreter profiling operations
   void set_method_data_pointer_for_bcp();
   void test_method_data_pointer(Register mdp, Label& zero_continue);
   void verify_method_data_pointer();

   void set_mdp_data_at(Register mdp_in, int constant, Register value);
   void increment_mdp_data_at(Address data, bool decrement = false);
   void increment_mdp_data_at(Register mdp_in, int constant,
                              bool decrement = false);
   void increment_mdp_data_at(Register mdp_in, Register reg, int constant,
                              bool decrement = false);
   void increment_mask_and_jump(Address counter_addr,
                                int increment, int mask,
                                Register scratch, bool preloaded,
                                Condition cond, Label* where);
   void set_mdp_flag_at(Register mdp_in, int flag_constant);
   void test_mdp_data_at(Register mdp_in, int offset, Register value,
                         Register test_value_out,
                         Label& not_equal_continue);

   void record_klass_in_profile(Register receiver, Register mdp,
                                Register reg2, bool is_virtual_call);
   void record_klass_in_profile_helper(Register receiver, Register mdp,
                                       Register reg2, int start_row,
                                       Label& done, bool is_virtual_call);

   void update_mdp_by_offset(Register mdp_in, int offset_of_offset);
   void update_mdp_by_offset(Register mdp_in, Register reg, int offset_of_disp);
   void update_mdp_by_constant(Register mdp_in, int constant);
   void update_mdp_for_ret(Register return_bci);

   void profile_taken_branch(Register mdp, Register bumped_count);
   void profile_not_taken_branch(Register mdp);
   void profile_call(Register mdp);
   void profile_final_call(Register mdp);
   void profile_virtual_call(Register receiver, Register mdp,
                             Register scratch2,
                             bool receiver_can_be_null = false);
   void profile_ret(Register return_bci, Register mdp);
   void profile_null_seen(Register mdp);
   void profile_typecheck(Register mdp, Register klass, Register scratch);
   void profile_typecheck_failed(Register mdp);
   void profile_switch_default(Register mdp);
   void profile_switch_case(Register index_in_scratch, Register mdp,
                            Register scratch2);

   // Debugging
   // only if +VerifyOops && state == atos
   void verify_oop(Register reg, TosState state = atos);
   // only if +VerifyFPU  && (state == ftos || state == dtos)
   void verify_FPU(int stack_depth, TosState state = ftos);

 #endif // !CC_INTERP

   typedef enum { NotifyJVMTI, SkipNotifyJVMTI } NotifyMethodExitMode;

   // support for jvmti/dtrace
   void notify_method_entry();
   void notify_method_exit(TosState state, NotifyMethodExitMode mode);
	/*
	* Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*
	*/

	#ifndef CC_INTERP
	protected:
	// Interpreter specific version of call_VM_base
	virtual void call_VM_leaf_base(address entry_point,
	int number_of_arguments);

	virtual void call_VM_base(Register oop_result,
	Register java_thread,
	Register last_java_sp,
	address entry_point,
	int number_of_arguments,
	bool check_exceptions);

	virtual void check_and_handle_popframe(Register java_thread);
	virtual void check_and_handle_earlyret(Register java_thread);

	// base routine for all dispatches
	void dispatch_base(TosState state, address* table, bool verifyoop = true);
	#endif // CC_INTERP

	public:
	InterpreterMacroAssembler(CodeBuffer* code) : MacroAssembler(code), _locals_register(r14), _bcp_register(r13) {}

	void load_earlyret_value(TosState state);

	#ifdef CC_INTERP
	void save_bcp() { /* not needed in c++ interpreter and harmless */ }
	void restore_bcp() { /* not needed in c++ interpreter and harmless */ }

	// Helpers for runtime call arguments/results
	void get_method(Register reg);

	#else

	// Interpreter-specific registers
	void save_bcp() {
	movptr(Address(rbp, frame::interpreter_frame_bcx_offset * wordSize), r13);
	}

	void restore_bcp() {
	movptr(r13, Address(rbp, frame::interpreter_frame_bcx_offset * wordSize));
	}

	void restore_locals() {
	movptr(r14, Address(rbp, frame::interpreter_frame_locals_offset * wordSize));
	}

	// Helpers for runtime call arguments/results
	void get_method(Register reg) {
	movptr(reg, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
	}

	void get_const(Register reg) {
	get_method(reg);
	movptr(reg, Address(reg, Method::const_offset()));
	}

	void get_constant_pool(Register reg) {
	get_const(reg);
	movptr(reg, Address(reg, ConstMethod::constants_offset()));
	}

	void get_constant_pool_cache(Register reg) {
	get_constant_pool(reg);
	movptr(reg, Address(reg, ConstantPool::cache_offset_in_bytes()));
	}

	void get_cpool_and_tags(Register cpool, Register tags) {
	get_constant_pool(cpool);
	movptr(tags, Address(cpool, ConstantPool::tags_offset_in_bytes()));
	}

	void get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset);
	void get_cache_and_index_at_bcp(Register cache, Register index, int bcp_offset, size_t index_size = sizeof(u2));
	void get_cache_and_index_and_bytecode_at_bcp(Register cache, Register index, Register bytecode, int byte_no, int bcp_offset, size_t index_size = sizeof(u2));
	void get_cache_entry_pointer_at_bcp(Register cache, Register tmp, int bcp_offset, size_t index_size = sizeof(u2));
	void get_cache_index_at_bcp(Register index, int bcp_offset, size_t index_size = sizeof(u2));
	void get_method_counters(Register method, Register mcs, Label& skip);

	// load cpool->resolved_references(index);
	void load_resolved_reference_at_index(Register result, Register index);

	void pop_ptr(Register r = rax);
	void pop_i(Register r = rax);
	void pop_l(Register r = rax);
	void pop_f(XMMRegister r = xmm0);
	void pop_d(XMMRegister r = xmm0);
	void push_ptr(Register r = rax);
	void push_i(Register r = rax);
	void push_l(Register r = rax);
	void push_f(XMMRegister r = xmm0);
	void push_d(XMMRegister r = xmm0);

	void pop(Register r ) { ((MacroAssembler*)this)->pop(r); }

	void push(Register r ) { ((MacroAssembler*)this)->push(r); }
	void push(int32_t imm ) { ((MacroAssembler*)this)->push(imm); }

	void pop(TosState state); // transition vtos -> state
	void push(TosState state); // transition state -> vtos

	void empty_expression_stack() {
	movptr(rsp, Address(rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize));
	// NULL last_sp until next java call
	movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
	}

	// Helpers for swap and dup
	void load_ptr(int n, Register val);
	void store_ptr(int n, Register val);

	// Generate a subtype check: branch to ok_is_subtype if sub_klass is
	// a subtype of super_klass.
	void gen_subtype_check( Register sub_klass, Label &ok_is_subtype );

	// Dispatching
	void dispatch_prolog(TosState state, int step = 0);
	void dispatch_epilog(TosState state, int step = 0);
	// dispatch via ebx (assume ebx is loaded already)
	void dispatch_only(TosState state);
	// dispatch normal table via ebx (assume ebx is loaded already)
	void dispatch_only_normal(TosState state);
	void dispatch_only_noverify(TosState state);
	// load ebx from [esi + step] and dispatch via ebx
	void dispatch_next(TosState state, int step = 0);
	// load ebx from [esi] and dispatch via ebx and table
	void dispatch_via (TosState state, address* table);

	// jump to an invoked target
	void prepare_to_jump_from_interpreted();
	void jump_from_interpreted(Register method, Register temp);


	// Returning from interpreted functions
	//
	// Removes the current activation (incl. unlocking of monitors)
	// and sets up the return address. This code is also used for
	// exception unwindwing. In that case, we do not want to throw
	// IllegalMonitorStateExceptions, since that might get us into an
	// infinite rethrow exception loop.
	// Additionally this code is used for popFrame and earlyReturn.
	// In popFrame case we want to skip throwing an exception,
	// installing an exception, and notifying jvmdi.
	// In earlyReturn case we only want to skip throwing an exception
	// and installing an exception.
	void remove_activation(TosState state, Register ret_addr,
	bool throw_monitor_exception = true,
	bool install_monitor_exception = true,
	bool notify_jvmdi = true);
	#endif // CC_INTERP

	// Object locking
	void lock_object (Register lock_reg);
	void unlock_object(Register lock_reg);

	#ifndef CC_INTERP

	// Interpreter profiling operations
	void set_method_data_pointer_for_bcp();
	void test_method_data_pointer(Register mdp, Label& zero_continue);
	void verify_method_data_pointer();

	void set_mdp_data_at(Register mdp_in, int constant, Register value);
	void increment_mdp_data_at(Address data, bool decrement = false);
	void increment_mdp_data_at(Register mdp_in, int constant,
	bool decrement = false);
	void increment_mdp_data_at(Register mdp_in, Register reg, int constant,
	bool decrement = false);
	void increment_mask_and_jump(Address counter_addr,
	int increment, int mask,
	Register scratch, bool preloaded,
	Condition cond, Label* where);
	void set_mdp_flag_at(Register mdp_in, int flag_constant);
	void test_mdp_data_at(Register mdp_in, int offset, Register value,
	Register test_value_out,
	Label& not_equal_continue);

	void record_klass_in_profile(Register receiver, Register mdp,
	Register reg2, bool is_virtual_call);
	void record_klass_in_profile_helper(Register receiver, Register mdp,
	Register reg2, int start_row,
	Label& done, bool is_virtual_call);

	void update_mdp_by_offset(Register mdp_in, int offset_of_offset);
	void update_mdp_by_offset(Register mdp_in, Register reg, int offset_of_disp);
	void update_mdp_by_constant(Register mdp_in, int constant);
	void update_mdp_for_ret(Register return_bci);

	void profile_taken_branch(Register mdp, Register bumped_count);
	void profile_not_taken_branch(Register mdp);
	void profile_call(Register mdp);
	void profile_final_call(Register mdp);
	void profile_virtual_call(Register receiver, Register mdp,
	Register scratch2,
	bool receiver_can_be_null = false);
	void profile_ret(Register return_bci, Register mdp);
	void profile_null_seen(Register mdp);
	void profile_typecheck(Register mdp, Register klass, Register scratch);
	void profile_typecheck_failed(Register mdp);
	void profile_switch_default(Register mdp);
	void profile_switch_case(Register index_in_scratch, Register mdp,
	Register scratch2);

	// Debugging
	// only if +VerifyOops && state == atos
	void verify_oop(Register reg, TosState state = atos);
	// only if +VerifyFPU && (state == ftos \|\| state == dtos)
	void verify_FPU(int stack_depth, TosState state = ftos);

	#endif // !CC_INTERP

	typedef enum { NotifyJVMTI, SkipNotifyJVMTI } NotifyMethodExitMode;

	// support for jvmti/dtrace
	void notify_method_entry();
	void notify_method_exit(TosState state, NotifyMethodExitMode mode);