/*

 * 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.

 *

 */

#include "asm/macroAssembler.hpp"

#include "interpreter/invocationCounter.hpp"

#include "runtime/frame.hpp"

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

typedef ByteSize (*OffsetFunction)(uint);

class InterpreterMacroAssembler: public MacroAssembler {

 public:

  // Interpreter specific version of call_VM_base

  virtual void call_VM_leaf_base(address entry_point,

                                 int number_of_arguments);

 protected:

  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);

  // base routine for all dispatches

  void dispatch_base(TosState state, address* table, bool verifyoop = true, bool generate_poll = false);

 public:

  InterpreterMacroAssembler(CodeBuffer* code) : MacroAssembler(code),

    _locals_register(LP64_ONLY(r14) NOT_LP64(rdi)),

    _bcp_register(LP64_ONLY(r13) NOT_LP64(rsi)) {}

  void jump_to_entry(address entry);

 virtual void check_and_handle_popframe(Register java_thread);

 virtual void check_and_handle_earlyret(Register java_thread);

  void load_earlyret_value(TosState state);

  // Interpreter-specific registers

  void save_bcp() {

    movptr(Address(rbp, frame::interpreter_frame_bcp_offset * wordSize), _bcp_register);

  }

  void restore_bcp() {

    movptr(_bcp_register, Address(rbp, frame::interpreter_frame_bcp_offset * wordSize));

  }

  void restore_locals() {

    movptr(_locals_register, 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));

  // load cpool->resolved_references(index);

  void load_resolved_reference_at_index(Register result, Register index, Register tmp = rscratch2);

  // load cpool->resolved_klass_at(index)

  void load_resolved_klass_at_index(Register cpool,  // the constant pool (corrupted on return)

                                    Register index,  // the constant pool index (corrupted on return)

                                    Register klass); // contains the Klass on return

  NOT_LP64(void f2ieee();)        // truncate ftos to 32bits

  NOT_LP64(void d2ieee();)        // truncate dtos to 64bits

  // Expression stack

  void pop_ptr(Register r = rax);

  void pop_i(Register r = rax);

  void push_ptr(Register r = rax);

  void push_i(Register r = rax);

  void push_f(XMMRegister r);

  void pop_f(XMMRegister r);

  void pop_d(XMMRegister r);

  void push_d(XMMRegister r);

#ifdef _LP64

  void pop_l(Register r = rax);

  void push_l(Register r = rax);

#else

  void pop_l(Register lo = rax, Register hi = rdx);

  void pop_f();

  void pop_d();

  void push_l(Register lo = rax, Register hi = rdx);

  void push_d();

  void push_f();

#endif // _LP64

  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

  // These are dummies to prevent surprise implicit conversions to Register

  void pop(void* v); // Add unimplemented ambiguous method

  void push(void* v);   // Add unimplemented ambiguous method

  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);

    NOT_LP64(empty_FPU_stack());

  }

  // 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 rbx (assume rbx is loaded already)

  void dispatch_only(TosState state, bool generate_poll = false);

  // dispatch normal table via rbx (assume rbx is loaded already)

  void dispatch_only_normal(TosState state);

  void dispatch_only_noverify(TosState state);

  // load rbx from [_bcp_register + step] and dispatch via rbx

  void dispatch_next(TosState state, int step = 0, bool generate_poll = false);

  // load rbx from [_bcp_register] and dispatch via rbx 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);

  // narrow int return value

  void narrow(Register result);

  // 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);

  void get_method_counters(Register method, Register mcs, Label& skip);

  // Object locking

  void lock_object  (Register lock_reg);

  void unlock_object(Register lock_reg);

  // 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, Address 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 record_item_in_profile_helper(Register item, Register mdp,

                                     Register reg2, int start_row, Label& done, int total_rows,

                                     OffsetFunction item_offset_fn, OffsetFunction item_count_offset_fn,

                                     int non_profiled_offset);

  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_called_method(Register method, Register mdp, Register reg2) NOT_JVMCI_RETURN;

  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);

  typedef enum { NotifyJVMTI, SkipNotifyJVMTI } NotifyMethodExitMode;

  // support for jvmti/dtrace

  void notify_method_entry();

  void notify_method_exit(TosState state, NotifyMethodExitMode mode);

 private:

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

  Register _bcp_register; // register that contains the bcp

 public:

  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);

};