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 /*

  * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.

  * Copyright 2012, 2014 SAP AG. 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

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  */

 #ifndef CPU_PPC_VM_INTERP_MASM_PPC_64_HPP

 #define CPU_PPC_VM_INTERP_MASM_PPC_64_HPP

 #include "asm/macroAssembler.hpp"

 #include "interpreter/invocationCounter.hpp"

 // This file specializes the assembler with interpreter-specific macros.

 class InterpreterMacroAssembler: public MacroAssembler {

  public:

   InterpreterMacroAssembler(CodeBuffer* code) : MacroAssembler(code) {}

   void null_check_throw(Register a, int offset, Register temp_reg);

   void branch_to_entry(address entry, Register Rscratch);

   // Handy address generation macros.

 #define thread_(field_name) in_bytes(JavaThread::field_name ## _offset()), R16_thread

 #define method_(field_name) in_bytes(Method::field_name ## _offset()), R19_method

 #ifdef CC_INTERP

 #define state_(field_name)  in_bytes(byte_offset_of(BytecodeInterpreter, field_name)), R14_state

 #define prev_state_(field_name)  in_bytes(byte_offset_of(BytecodeInterpreter, field_name)), R15_prev_state

   void pop (TosState state) {};           // Not needed.

   void push(TosState state) {};           // Not needed.

 #endif

 #ifndef CC_INTERP

   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);

   void load_earlyret_value(TosState state, Register Rscratch1);

   static const Address l_tmp;

   static const Address d_tmp;

   // dispatch routines

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

   void dispatch_via (TosState state, address* table);

   void load_dispatch_table(Register dst, address* table);

   void dispatch_Lbyte_code(TosState state, Register bytecode, address* table, bool verify = false);

   // Called by shared interpreter generator.

   void dispatch_prolog(TosState state, int step = 0);

   void dispatch_epilog(TosState state, int step = 0);

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

   void super_call_VM_leaf(Register thread_cache, address entry_point, Register arg_1);

   void super_call_VM(Register thread_cache, Register oop_result, Register last_java_sp,

                      address entry_point, Register arg_1, Register arg_2, bool check_exception = true);

   // Generate a subtype check: branch to ok_is_subtype if sub_klass is

   // a subtype of super_klass.  Blows registers tmp1, tmp2 and tmp3.

   void gen_subtype_check(Register sub_klass, Register super_klass,

                          Register tmp1, Register tmp2, Register tmp3, Label &ok_is_subtype);

   // Load object from cpool->resolved_references(index).

   void load_resolved_reference_at_index(Register result, Register index);

   void generate_stack_overflow_check_with_compare_and_throw(Register Rmem_frame_size, Register Rscratch1);

   void load_receiver(Register Rparam_count, Register Rrecv_dst);

   // helpers for expression stack

   void pop_i(     Register r = R17_tos);

   void pop_ptr(   Register r = R17_tos);

   void pop_l(     Register r = R17_tos);

   void pop_f(FloatRegister f = F15_ftos);

   void pop_d(FloatRegister f = F15_ftos );

   void push_i(     Register r = R17_tos);

   void push_ptr(   Register r = R17_tos);

   void push_l(     Register r = R17_tos);

   void push_f(FloatRegister f = F15_ftos );

   void push_d(FloatRegister f = F15_ftos);

   void push_2ptrs(Register first, Register second);

   void push_l_pop_d(Register l = R17_tos, FloatRegister d = F15_ftos);

   void push_d_pop_l(FloatRegister d = F15_ftos, Register l = R17_tos);

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

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

   void empty_expression_stack();       // Resets both Lesp and SP.

  public:

   // Load values from bytecode stream:

   enum signedOrNot { Signed, Unsigned };

   enum setCCOrNot  { set_CC, dont_set_CC };

   void get_2_byte_integer_at_bcp(int         bcp_offset,

                                  Register    Rdst,

                                  signedOrNot is_signed);

   void get_4_byte_integer_at_bcp(int         bcp_offset,

                                  Register    Rdst,

                                  signedOrNot is_signed = Unsigned);

   void get_cache_index_at_bcp(Register Rdst, int bcp_offset, size_t index_size);

   void get_cache_and_index_at_bcp(Register cache, int bcp_offset, size_t index_size = sizeof(u2));

   void get_u4(Register Rdst, Register Rsrc, int offset, signedOrNot is_signed);

   // common code

   void field_offset_at(int n, Register tmp, Register dest, Register base);

   int  field_offset_at(Register object, address bcp, int offset);

   void fast_iaaccess(int n, address bcp);

   void fast_iagetfield(address bcp);

   void fast_iaputfield(address bcp, bool do_store_check);

   void index_check(Register array, Register index, int index_shift, Register tmp, Register res);

   void index_check_without_pop(Register array, Register index, int index_shift, Register tmp, Register res);

   void get_const(Register Rdst);

   void get_constant_pool(Register Rdst);

   void get_constant_pool_cache(Register Rdst);

   void get_cpool_and_tags(Register Rcpool, Register Rtags);

   void is_a(Label& L);

   // Java Call Helpers

   void call_from_interpreter(Register Rtarget_method, Register Rret_addr, Register Rscratch1, Register Rscratch2);

   // --------------------------------------------------

   void unlock_if_synchronized_method(TosState state, bool throw_monitor_exception = true,

                                      bool install_monitor_exception = true);

   // Removes the current activation (incl. unlocking of monitors).

   // Additionally this code is used for earlyReturn in which case we

   // want to skip throwing an exception and installing an exception.

   void remove_activation(TosState state,

                          bool throw_monitor_exception = true,

                          bool install_monitor_exception = true);

   void merge_frames(Register Rtop_frame_sp, Register return_pc, Register Rscratch1, Register Rscratch2); // merge top frames

   void add_monitor_to_stack(bool stack_is_empty, Register Rtemp1, Register Rtemp2);

   // Local variable access helpers

   void load_local_int(Register Rdst_value, Register Rdst_address, Register Rindex);

   void load_local_long(Register Rdst_value, Register Rdst_address, Register Rindex);

   void load_local_ptr(Register Rdst_value, Register Rdst_address, Register Rindex);

   void load_local_float(FloatRegister Rdst_value, Register Rdst_address, Register Rindex);

   void load_local_double(FloatRegister Rdst_value, Register Rdst_address, Register Rindex);

   void store_local_int(Register Rvalue, Register Rindex);

   void store_local_long(Register Rvalue, Register Rindex);

   void store_local_ptr(Register Rvalue, Register Rindex);

   void store_local_float(FloatRegister Rvalue, Register Rindex);

   void store_local_double(FloatRegister Rvalue, Register Rindex);

   // Call VM for std frames

   // Special call VM versions that check for exceptions and forward exception

   // via short cut (not via expensive forward exception stub).

   void check_and_forward_exception(Register Rscratch1, Register Rscratch2);

   void call_VM(Register oop_result, address entry_point, bool check_exceptions = true);

   void call_VM(Register oop_result, address entry_point, Register arg_1, bool check_exceptions = true);

   void call_VM(Register oop_result, address entry_point, Register arg_1, Register arg_2, bool check_exceptions = true);

   void call_VM(Register oop_result, address entry_point, Register arg_1, Register arg_2, Register arg_3, bool check_exceptions = true);

   // Should not be used:

   void call_VM(Register oop_result, Register last_java_sp, address entry_point, bool check_exceptions = true) {ShouldNotReachHere();}

   void call_VM(Register oop_result, Register last_java_sp, address entry_point, Register arg_1, bool check_exceptions = true) {ShouldNotReachHere();}

   void call_VM(Register oop_result, Register last_java_sp, address entry_point, Register arg_1, Register arg_2, bool check_exceptions = true) {ShouldNotReachHere();}

   void call_VM(Register oop_result, Register last_java_sp, address entry_point, Register arg_1, Register arg_2, Register arg_3, bool check_exceptions = true) {ShouldNotReachHere();}

   Address first_local_in_stack();

   enum LoadOrStore { load, store };

   void static_iload_or_store(int which_local, LoadOrStore direction, Register Rtmp);

   void static_aload_or_store(int which_local, LoadOrStore direction, Register Rtmp);

   void static_dload_or_store(int which_local, LoadOrStore direction);

   void save_interpreter_state(Register scratch);

   void restore_interpreter_state(Register scratch, bool bcp_and_mdx_only = false);

   void increment_backedge_counter(const Register Rcounters, Register Rtmp, Register Rtmp2, Register Rscratch);

   void test_backedge_count_for_osr(Register backedge_count, Register branch_bcp, Register Rtmp);

   void record_static_call_in_profile(Register Rentry, Register Rtmp);

   void record_receiver_call_in_profile(Register Rklass, Register Rentry, Register Rtmp);

 #endif // !CC_INTERP

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

   void increment_invocation_counter(Register iv_be_count, Register Rtmp1, Register Rtmp2_r0);

   // Object locking

   void lock_object  (Register lock_reg, Register obj_reg);

   void unlock_object(Register lock_reg, bool check_for_exceptions = true);

 #ifndef CC_INTERP

   // Interpreter profiling operations

   void set_method_data_pointer_for_bcp();

   void test_method_data_pointer(Label& zero_continue);

   void verify_method_data_pointer();

   void test_invocation_counter_for_mdp(Register invocation_count, Register Rscratch, Label &profile_continue);

   void set_mdp_data_at(int constant, Register value);

   void increment_mdp_data_at(int constant, Register counter_addr, Register Rbumped_count, bool decrement = false);

   void increment_mdp_data_at(Register counter_addr, Register Rbumped_count, bool decrement = false);

   void increment_mdp_data_at(Register reg, int constant, Register scratch, Register Rbumped_count, bool decrement = false);

   void set_mdp_flag_at(int flag_constant, Register scratch);

   void test_mdp_data_at(int offset, Register value, Label& not_equal_continue, Register test_out);

   void update_mdp_by_offset(int offset_of_disp, Register scratch);

   void update_mdp_by_offset(Register reg, int offset_of_disp,

                             Register scratch);

   void update_mdp_by_constant(int constant);

   void update_mdp_for_ret(TosState state, Register return_bci);

   void profile_taken_branch(Register scratch, Register bumped_count);

   void profile_not_taken_branch(Register scratch1, Register scratch2);

   void profile_call(Register scratch1, Register scratch2);

   void profile_final_call(Register scratch1, Register scratch2);

   void profile_virtual_call(Register Rreceiver, Register Rscratch1, Register Rscratch2,  bool receiver_can_be_null);

   void profile_typecheck(Register Rklass, Register Rscratch1, Register Rscratch2);

   void profile_typecheck_failed(Register Rscratch1, Register Rscratch2);

   void profile_ret(TosState state, Register return_bci, Register scratch1, Register scratch2);

   void profile_switch_default(Register scratch1, Register scratch2);

   void profile_switch_case(Register index, Register scratch1,Register scratch2, Register scratch3);

   void profile_null_seen(Register Rscratch1, Register Rscratch2);

   void record_klass_in_profile(Register receiver, Register scratch1, Register scratch2, bool is_virtual_call);

   void record_klass_in_profile_helper(Register receiver, Register scratch1, Register scratch2, int start_row, Label& done, bool is_virtual_call);

   // Argument and return type profiling.

   void profile_obj_type(Register obj, Register mdo_addr_base, RegisterOrConstant mdo_addr_offs, Register tmp, Register tmp2);

   void profile_arguments_type(Register callee, Register tmp1, Register tmp2, bool is_virtual);

   void profile_return_type(Register ret, Register tmp1, Register tmp2);

   void profile_parameters_type(Register tmp1, Register tmp2, Register tmp3, Register tmp4);

 #endif // !CC_INTERP

   // Debugging

   void verify_oop(Register reg, TosState state = atos);    // only if +VerifyOops && state == atos

 #ifndef CC_INTERP

   void verify_oop_or_return_address(Register reg, Register rtmp); // for astore

   void verify_FPU(int stack_depth, TosState state = ftos);

 #endif // !CC_INTERP

   typedef enum { NotifyJVMTI, SkipNotifyJVMTI } NotifyMethodExitMode;

   // Support for jvmdi/jvmpi.

   void notify_method_entry();

   void notify_method_exit(bool is_native_method, TosState state,

                           NotifyMethodExitMode mode, bool check_exceptions);

 #ifdef CC_INTERP

   // Convert the current TOP_IJAVA_FRAME into a PARENT_IJAVA_FRAME

   // (using parent_frame_resize) and push a new interpreter

   // TOP_IJAVA_FRAME (using frame_size).

   void push_interpreter_frame(Register top_frame_size, Register parent_frame_resize,

                               Register tmp1, Register tmp2, Register tmp3, Register tmp4, Register pc=noreg);

   // Pop the topmost TOP_IJAVA_FRAME and convert the previous

   // PARENT_IJAVA_FRAME back into a TOP_IJAVA_FRAME.

   void pop_interpreter_frame(Register tmp1, Register tmp2, Register tmp3, Register tmp4);

   // Turn state's interpreter frame into the current TOP_IJAVA_FRAME.

   void pop_interpreter_frame_to_state(Register state, Register tmp1, Register tmp2, Register tmp3);

   // Set SP to initial caller's sp, but before fix the back chain.

   void resize_frame_to_initial_caller(Register tmp1, Register tmp2);

   // Pop the current interpreter state (without popping the

   // correspoding frame) and restore R14_state and R15_prev_state

   // accordingly. Use prev_state_may_be_0 to indicate whether

   // prev_state may be 0 in order to generate an extra check before

   // retrieving prev_state_(_prev_link).

   void pop_interpreter_state(bool prev_state_may_be_0);

   void restore_prev_state();

 #endif

 };

 #endif // CPU_PPC_VM_INTERP_MASM_PPC_64_HPP