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 /*

  * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.

  * Copyright (c) 2015, 2016, Loongson Technology. 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.

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  */

 #ifndef CPU_MIPS_VM_INTERP_MASM_MIPS_64_HPP

 #define CPU_MIPS_VM_INTERP_MASM_MIPS_64_HPP

 #include "asm/assembler.hpp"

 #include "asm/macroAssembler.hpp"

 #include "asm/macroAssembler.inline.hpp"

 #include "interpreter/invocationCounter.hpp"

 #include "runtime/frame.hpp"

 // This file specializes the assember with interpreter-specific macros

 class InterpreterMacroAssembler: public MacroAssembler {

 #ifndef CC_INTERP

  private:

   Register _locals_register; // register that contains the pointer to the locals

   Register _bcp_register; // register that contains the bcp

  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:

   // narrow int return value

   void narrow(Register result);

   InterpreterMacroAssembler(CodeBuffer* code) : MacroAssembler(code), _locals_register(LVP), _bcp_register(BCP) {}

   void  get_2_byte_integer_at_bcp(Register reg, Register tmp, int offset);

   void  get_4_byte_integer_at_bcp(Register reg, Register tmp, int offset);

   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() {

     sd(BCP, FP, frame::interpreter_frame_bcx_offset * wordSize);

   }

   void restore_bcp() {

     ld(BCP, FP, frame::interpreter_frame_bcx_offset * wordSize);

   }

   void restore_locals() {

     ld(LVP, FP, frame::interpreter_frame_locals_offset * wordSize);

   }

   // Helpers for runtime call arguments/results

   void get_method(Register reg) {

     ld(reg, FP, frame::interpreter_frame_method_offset * wordSize);

   }

   void get_const(Register reg){

     get_method(reg);

     ld(reg, reg, in_bytes(Method::const_offset()));

   }

   void get_constant_pool(Register reg) {

     get_const(reg);

     ld(reg, reg, in_bytes(ConstMethod::constants_offset()));

   }

   void get_constant_pool_cache(Register reg) {

     get_constant_pool(reg);

     ld(reg, reg, ConstantPool::cache_offset_in_bytes());

   }

   void get_cpool_and_tags(Register cpool, Register tags) {

     get_constant_pool(cpool);

     ld(tags, 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 = FSR);

   void pop_i(     Register r = FSR);

   void pop_l(     Register r = FSR);

   void pop_f(FloatRegister r = FSF);

   void pop_d(FloatRegister r = FSF);

   void push_ptr(   Register r = FSR);

   void push_i(     Register r = FSR);

   void push_l(     Register r = FSR);

   void push_f(FloatRegister r = FSF);

   void push_d(FloatRegister r = FSF);

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

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

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

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

   void empty_expression_stack() {

     ld(SP, FP, frame::interpreter_frame_monitor_block_top_offset * wordSize);

     // NULL last_sp until next java call

     sd(R0, FP, frame::interpreter_frame_last_sp_offset * wordSize);

   }

   // Super call_VM calls - correspond to MacroAssembler::call_VM(_leaf) calls

   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 );

   void gen_subtype_check( Register Rsup_klass, 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);

   void profile_obj_type(Register obj, const Address& mdo_addr);

   void profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual);

   void profile_return_type(Register mdp, Register ret, Register tmp);

   void profile_parameters_type(Register mdp, Register tmp1, Register tmp2);

 #endif // !CC_INTERP

   typedef enum { NotifyJVMTI, SkipNotifyJVMTI } NotifyMethodExitMode;

   // support for jvmti/dtrace

   void notify_method_entry();

   void notify_method_exit(bool is_native_method, TosState state, NotifyMethodExitMode mode);

   void save_return_value(TosState state, bool is_native_call);

   void restore_return_value(TosState state, bool is_native_call);

 };

 #endif // CPU_MIPS_VM_INTERP_MASM_MIPS_64_HPP