jdk8-mips64-public/hotspot: src/cpu/ppc/vm/macroAssembler

src/cpu/ppc/vm/macroAssembler_ppc.hpp@710a3c8b516e (annotated)

src/cpu/ppc/vm/macroAssembler_ppc.hpp

Tue, 08 Aug 2017 15:57:29 +0800

author: aoqi
date: Tue, 08 Aug 2017 15:57:29 +0800
changeset 6876: 710a3c8b516e
parent 6515: 71a71b0bc844
parent 0: f90c822e73f8
child 7535: 7ae4e26cb1e0
permissions: -rw-r--r--

merge

 /*
  * 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
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef CPU_PPC_VM_MACROASSEMBLER_PPC_HPP
 #define CPU_PPC_VM_MACROASSEMBLER_PPC_HPP
 #include "asm/assembler.hpp"
 // MacroAssembler extends Assembler by a few frequently used macros.
 class ciTypeArray;
 class MacroAssembler: public Assembler {
  public:
   MacroAssembler(CodeBuffer* code) : Assembler(code) {}
   //
   // Optimized instruction emitters
   //
   inline static int largeoffset_si16_si16_hi(int si31) { return (si31 + (1<<15)) >> 16; }
   inline static int largeoffset_si16_si16_lo(int si31) { return si31 - (((si31 + (1<<15)) >> 16) << 16); }
   // load d = *[a+si31]
   // Emits several instructions if the offset is not encodable in one instruction.
   void ld_largeoffset_unchecked(Register d, int si31, Register a, int emit_filler_nop);
   void ld_largeoffset          (Register d, int si31, Register a, int emit_filler_nop);
   inline static bool is_ld_largeoffset(address a);
   inline static int get_ld_largeoffset_offset(address a);
   inline void round_to(Register r, int modulus);
   // Load/store with type given by parameter.
   void load_sized_value( Register dst, RegisterOrConstant offs, Register base, size_t size_in_bytes, bool is_signed);
   void store_sized_value(Register dst, RegisterOrConstant offs, Register base, size_t size_in_bytes);
   // Move register if destination register and target register are different
   inline void mr_if_needed(Register rd, Register rs);
   inline void fmr_if_needed(FloatRegister rd, FloatRegister rs);
   // This is dedicated for emitting scheduled mach nodes. For better
   // readability of the ad file I put it here.
   // Endgroups are not needed if
   //  - the scheduler is off
   //  - the scheduler found that there is a natural group end, in that
   //    case it reduced the size of the instruction used in the test
   //    yielding 'needed'.
   inline void endgroup_if_needed(bool needed);
   // Memory barriers.
   inline void membar(int bits);
   inline void release();
   inline void acquire();
   inline void fence();
   // nop padding
   void align(int modulus, int max = 252, int rem = 0);
   //
   // Constants, loading constants, TOC support
   //
   // Address of the global TOC.
   inline static address global_toc();
   // Offset of given address to the global TOC.
   inline static int offset_to_global_toc(const address addr);
   // Address of TOC of the current method.
   inline address method_toc();
   // Offset of given address to TOC of the current method.
   inline int offset_to_method_toc(const address addr);
   // Global TOC.
   void calculate_address_from_global_toc(Register dst, address addr,
                                          bool hi16 = true, bool lo16 = true,
                                          bool add_relocation = true, bool emit_dummy_addr = false);
   inline void calculate_address_from_global_toc_hi16only(Register dst, address addr) {
     calculate_address_from_global_toc(dst, addr, true, false);
   };
   inline void calculate_address_from_global_toc_lo16only(Register dst, address addr) {
     calculate_address_from_global_toc(dst, addr, false, true);
   };
   inline static bool is_calculate_address_from_global_toc_at(address a, address bound);
   static int patch_calculate_address_from_global_toc_at(address a, address addr, address bound);
   static address get_address_of_calculate_address_from_global_toc_at(address a, address addr);
 #ifdef _LP64
   // Patch narrow oop constant.
   inline static bool is_set_narrow_oop(address a, address bound);
   static int patch_set_narrow_oop(address a, address bound, narrowOop data);
   static narrowOop get_narrow_oop(address a, address bound);
 #endif
   inline static bool is_load_const_at(address a);
   // Emits an oop const to the constant pool, loads the constant, and
   // sets a relocation info with address current_pc.
   void load_const_from_method_toc(Register dst, AddressLiteral& a, Register toc);
   void load_toc_from_toc(Register dst, AddressLiteral& a, Register toc) {
     assert(dst == R2_TOC, "base register must be TOC");
     load_const_from_method_toc(dst, a, toc);
   }
   static bool is_load_const_from_method_toc_at(address a);
   static int get_offset_of_load_const_from_method_toc_at(address a);
   // Get the 64 bit constant from a `load_const' sequence.
   static long get_const(address load_const);
   // Patch the 64 bit constant of a `load_const' sequence. This is a
   // low level procedure. It neither flushes the instruction cache nor
   // is it atomic.
   static void patch_const(address load_const, long x);
   // Metadata in code that we have to keep track of.
   AddressLiteral allocate_metadata_address(Metadata* obj); // allocate_index
   AddressLiteral constant_metadata_address(Metadata* obj); // find_index
   // Oops used directly in compiled code are stored in the constant pool,
   // and loaded from there.
   // Allocate new entry for oop in constant pool. Generate relocation.
   AddressLiteral allocate_oop_address(jobject obj);
   // Find oop obj in constant pool. Return relocation with it's index.
   AddressLiteral constant_oop_address(jobject obj);
   // Find oop in constant pool and emit instructions to load it.
   // Uses constant_oop_address.
   inline void set_oop_constant(jobject obj, Register d);
   // Same as load_address.
   inline void set_oop         (AddressLiteral obj_addr, Register d);
   // Read runtime constant:  Issue load if constant not yet established,
   // else use real constant.
   virtual RegisterOrConstant delayed_value_impl(intptr_t* delayed_value_addr,
                                                 Register tmp,
                                                 int offset);
   //
   // branch, jump
   //
   inline void pd_patch_instruction(address branch, address target);
   NOT_PRODUCT(static void pd_print_patched_instruction(address branch);)
   // Conditional far branch for destinations encodable in 24+2 bits.
   // Same interface as bc, e.g. no inverse boint-field.
   enum {
     bc_far_optimize_not         = 0,
     bc_far_optimize_on_relocate = 1
   };
   // optimize: flag for telling the conditional far branch to optimize
   //           itself when relocated.
   void bc_far(int boint, int biint, Label& dest, int optimize);
   // Relocation of conditional far branches.
   static bool    is_bc_far_at(address instruction_addr);
   static address get_dest_of_bc_far_at(address instruction_addr);
   static void    set_dest_of_bc_far_at(address instruction_addr, address dest);
  private:
   static bool inline is_bc_far_variant1_at(address instruction_addr);
   static bool inline is_bc_far_variant2_at(address instruction_addr);
   static bool inline is_bc_far_variant3_at(address instruction_addr);
  public:
   // Convenience bc_far versions.
   inline void blt_far(ConditionRegister crx, Label& L, int optimize);
   inline void bgt_far(ConditionRegister crx, Label& L, int optimize);
   inline void beq_far(ConditionRegister crx, Label& L, int optimize);
   inline void bso_far(ConditionRegister crx, Label& L, int optimize);
   inline void bge_far(ConditionRegister crx, Label& L, int optimize);
   inline void ble_far(ConditionRegister crx, Label& L, int optimize);
   inline void bne_far(ConditionRegister crx, Label& L, int optimize);
   inline void bns_far(ConditionRegister crx, Label& L, int optimize);
   // Emit, identify and patch a NOT mt-safe patchable 64 bit absolute call/jump.
  private:
   enum {
     bxx64_patchable_instruction_count = (2/*load_codecache_const*/ + 3/*5load_const*/ + 1/*mtctr*/ + 1/*bctrl*/),
     bxx64_patchable_size              = bxx64_patchable_instruction_count * BytesPerInstWord,
     bxx64_patchable_ret_addr_offset   = bxx64_patchable_size
   };
   void bxx64_patchable(address target, relocInfo::relocType rt, bool link);
   static bool is_bxx64_patchable_at(            address instruction_addr, bool link);
   // Does the instruction use a pc-relative encoding of the destination?
   static bool is_bxx64_patchable_pcrelative_at( address instruction_addr, bool link);
   static bool is_bxx64_patchable_variant1_at(   address instruction_addr, bool link);
   // Load destination relative to global toc.
   static bool is_bxx64_patchable_variant1b_at(  address instruction_addr, bool link);
   static bool is_bxx64_patchable_variant2_at(   address instruction_addr, bool link);
   static void set_dest_of_bxx64_patchable_at(   address instruction_addr, address target, bool link);
   static address get_dest_of_bxx64_patchable_at(address instruction_addr, bool link);
  public:
   // call
   enum {
     bl64_patchable_instruction_count = bxx64_patchable_instruction_count,
     bl64_patchable_size              = bxx64_patchable_size,
     bl64_patchable_ret_addr_offset   = bxx64_patchable_ret_addr_offset
   };
   inline void bl64_patchable(address target, relocInfo::relocType rt) {
     bxx64_patchable(target, rt, /*link=*/true);
   }
   inline static bool is_bl64_patchable_at(address instruction_addr) {
     return is_bxx64_patchable_at(instruction_addr, /*link=*/true);
   }
   inline static bool is_bl64_patchable_pcrelative_at(address instruction_addr) {
     return is_bxx64_patchable_pcrelative_at(instruction_addr, /*link=*/true);
   }
   inline static void set_dest_of_bl64_patchable_at(address instruction_addr, address target) {
     set_dest_of_bxx64_patchable_at(instruction_addr, target, /*link=*/true);
   }
   inline static address get_dest_of_bl64_patchable_at(address instruction_addr) {
     return get_dest_of_bxx64_patchable_at(instruction_addr, /*link=*/true);
   }
   // jump
   enum {
     b64_patchable_instruction_count = bxx64_patchable_instruction_count,
     b64_patchable_size              = bxx64_patchable_size,
   };
   inline void b64_patchable(address target, relocInfo::relocType rt) {
     bxx64_patchable(target, rt, /*link=*/false);
   }
   inline static bool is_b64_patchable_at(address instruction_addr) {
     return is_bxx64_patchable_at(instruction_addr, /*link=*/false);
   }
   inline static bool is_b64_patchable_pcrelative_at(address instruction_addr) {
     return is_bxx64_patchable_pcrelative_at(instruction_addr, /*link=*/false);
   }
   inline static void set_dest_of_b64_patchable_at(address instruction_addr, address target) {
     set_dest_of_bxx64_patchable_at(instruction_addr, target, /*link=*/false);
   }
   inline static address get_dest_of_b64_patchable_at(address instruction_addr) {
     return get_dest_of_bxx64_patchable_at(instruction_addr, /*link=*/false);
   }
   //
   // Support for frame handling
   //
   // some ABI-related functions
   void save_nonvolatile_gprs(   Register dst_base, int offset);
   void restore_nonvolatile_gprs(Register src_base, int offset);
   void save_volatile_gprs(   Register dst_base, int offset);
   void restore_volatile_gprs(Register src_base, int offset);
   void save_LR_CR(   Register tmp);     // tmp contains LR on return.
   void restore_LR_CR(Register tmp);
   // Get current PC using bl-next-instruction trick.
   address get_PC_trash_LR(Register result);
   // Resize current frame either relatively wrt to current SP or absolute.
   void resize_frame(Register offset, Register tmp);
   void resize_frame(int      offset, Register tmp);
   void resize_frame_absolute(Register addr, Register tmp1, Register tmp2);
   // Push a frame of size bytes.
   void push_frame(Register bytes, Register tmp);
   // Push a frame of size `bytes'. No abi space provided.
   void push_frame(unsigned int bytes, Register tmp);
   // Push a frame of size `bytes' plus abi_reg_args on top.
   void push_frame_reg_args(unsigned int bytes, Register tmp);
   // Setup up a new C frame with a spill area for non-volatile GPRs and additional
   // space for local variables
   void push_frame_reg_args_nonvolatiles(unsigned int bytes, Register tmp);
   // pop current C frame
   void pop_frame();
   //
   // Calls
   //
  private:
   address _last_calls_return_pc;
 #if defined(ABI_ELFv2)
   // Generic version of a call to C function.
   // Updates and returns _last_calls_return_pc.
   address branch_to(Register function_entry, bool and_link);
 #else
   // Generic version of a call to C function via a function descriptor
   // with variable support for C calling conventions (TOC, ENV, etc.).
   // updates and returns _last_calls_return_pc.
   address branch_to(Register function_descriptor, bool and_link, bool save_toc_before_call,
                     bool restore_toc_after_call, bool load_toc_of_callee, bool load_env_of_callee);
 #endif
  public:
   // Get the pc where the last call will return to. returns _last_calls_return_pc.
   inline address last_calls_return_pc();
 #if defined(ABI_ELFv2)
   // Call a C function via a function descriptor and use full C
   // calling conventions. Updates and returns _last_calls_return_pc.
   address call_c(Register function_entry);
   // For tail calls: only branch, don't link, so callee returns to caller of this function.
   address call_c_and_return_to_caller(Register function_entry);
   address call_c(address function_entry, relocInfo::relocType rt);
 #else
   // Call a C function via a function descriptor and use full C
   // calling conventions. Updates and returns _last_calls_return_pc.
   address call_c(Register function_descriptor);
   // For tail calls: only branch, don't link, so callee returns to caller of this function.
   address call_c_and_return_to_caller(Register function_descriptor);
   address call_c(const FunctionDescriptor* function_descriptor, relocInfo::relocType rt);
   address call_c_using_toc(const FunctionDescriptor* function_descriptor, relocInfo::relocType rt,
                            Register toc);
 #endif
  protected:
   // It is imperative that all calls into the VM are handled via the
   // call_VM macros. They make sure that the stack linkage is setup
   // correctly. call_VM's correspond to ENTRY/ENTRY_X entry points
   // while call_VM_leaf's correspond to LEAF entry points.
   //
   // This is the base routine called by the different versions of
   // call_VM. The interpreter may customize this version by overriding
   // it for its purposes (e.g., to save/restore additional registers
   // when doing a VM call).
   //
   // If no last_java_sp is specified (noreg) then SP will be used instead.
   virtual void call_VM_base(
      // where an oop-result ends up if any; use noreg otherwise
     Register        oop_result,
     // to set up last_Java_frame in stubs; use noreg otherwise
     Register        last_java_sp,
     // the entry point
     address         entry_point,
     // flag which indicates if exception should be checked
     bool            check_exception = true
   );
   // Support for VM calls. This is the base routine called by the
   // different versions of call_VM_leaf. The interpreter may customize
   // this version by overriding it for its purposes (e.g., to
   // save/restore additional registers when doing a VM call).
   void call_VM_leaf_base(address entry_point);
  public:
   // Call into the VM.
   // Passes the thread pointer (in R3_ARG1) as a prepended argument.
   // Makes sure oop return values are visible to the GC.
   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_leaf(address entry_point);
   void call_VM_leaf(address entry_point, Register arg_1);
   void call_VM_leaf(address entry_point, Register arg_1, Register arg_2);
   void call_VM_leaf(address entry_point, Register arg_1, Register arg_2, Register arg_3);
   // Call a stub function via a function descriptor, but don't save
   // TOC before call, don't setup TOC and ENV for call, and don't
   // restore TOC after call. Updates and returns _last_calls_return_pc.
   inline address call_stub(Register function_entry);
   inline void call_stub_and_return_to(Register function_entry, Register return_pc);
   //
   // Java utilities
   //
   // Read from the polling page, its address is already in a register.
   inline void load_from_polling_page(Register polling_page_address, int offset = 0);
   // Check whether instruction is a read access to the polling page
   // which was emitted by load_from_polling_page(..).
   static bool is_load_from_polling_page(int instruction, void* ucontext/*may be NULL*/,
                                         address* polling_address_ptr = NULL);
   // Check whether instruction is a write access to the memory
   // serialization page realized by one of the instructions stw, stwu,
   // stwx, or stwux.
   static bool is_memory_serialization(int instruction, JavaThread* thread, void* ucontext);
   // Support for NULL-checks
   //
   // Generates code that causes a NULL OS exception if the content of reg is NULL.
   // If the accessed location is M[reg + offset] and the offset is known, provide the
   // offset. No explicit code generation is needed if the offset is within a certain
   // range (0 <= offset <= page_size).
   // Stack overflow checking
   void bang_stack_with_offset(int offset);
   // If instruction is a stack bang of the form ld, stdu, or
   // stdux, return the banged address. Otherwise, return 0.
   static address get_stack_bang_address(int instruction, void* ucontext);
   // Atomics
   // CmpxchgX sets condition register to cmpX(current, compare).
   // (flag == ne) => (dest_current_value != compare_value), (!swapped)
   // (flag == eq) => (dest_current_value == compare_value), ( swapped)
   static inline bool cmpxchgx_hint_acquire_lock()  { return true; }
   // The stxcx will probably not be succeeded by a releasing store.
   static inline bool cmpxchgx_hint_release_lock()  { return false; }
   static inline bool cmpxchgx_hint_atomic_update() { return false; }
   // Cmpxchg semantics
   enum {
     MemBarNone = 0,
     MemBarRel  = 1,
     MemBarAcq  = 2,
     MemBarFenceAfter = 4 // use powers of 2
   };
   void cmpxchgw(ConditionRegister flag,
                 Register dest_current_value, Register compare_value, Register exchange_value, Register addr_base,
                 int semantics, bool cmpxchgx_hint = false,
                 Register int_flag_success = noreg, bool contention_hint = false);
   void cmpxchgd(ConditionRegister flag,
                 Register dest_current_value, Register compare_value, Register exchange_value, Register addr_base,
                 int semantics, bool cmpxchgx_hint = false,
                 Register int_flag_success = noreg, Label* failed = NULL, bool contention_hint = false);
   // interface method calling
   void lookup_interface_method(Register recv_klass,
                                Register intf_klass,
                                RegisterOrConstant itable_index,
                                Register method_result,
                                Register temp_reg, Register temp2_reg,
                                Label& no_such_interface);
   // virtual method calling
   void lookup_virtual_method(Register recv_klass,
                              RegisterOrConstant vtable_index,
                              Register method_result);
   // Test sub_klass against super_klass, with fast and slow paths.
   // The fast path produces a tri-state answer: yes / no / maybe-slow.
   // One of the three labels can be NULL, meaning take the fall-through.
   // If super_check_offset is -1, the value is loaded up from super_klass.
   // No registers are killed, except temp_reg and temp2_reg.
   // If super_check_offset is not -1, temp2_reg is not used and can be noreg.
   void check_klass_subtype_fast_path(Register sub_klass,
                                      Register super_klass,
                                      Register temp1_reg,
                                      Register temp2_reg,
                                      Label& L_success,
                                      Label& L_failure);
   // The rest of the type check; must be wired to a corresponding fast path.
   // It does not repeat the fast path logic, so don't use it standalone.
   // The temp_reg can be noreg, if no temps are available.
   // It can also be sub_klass or super_klass, meaning it's OK to kill that one.
   // Updates the sub's secondary super cache as necessary.
   void check_klass_subtype_slow_path(Register sub_klass,
                                      Register super_klass,
                                      Register temp1_reg,
                                      Register temp2_reg,
                                      Label* L_success = NULL,
                                      Register result_reg = noreg);
   // Simplified, combined version, good for typical uses.
   // Falls through on failure.
   void check_klass_subtype(Register sub_klass,
                            Register super_klass,
                            Register temp1_reg,
                            Register temp2_reg,
                            Label& L_success);
   // Method handle support (JSR 292).
   void check_method_handle_type(Register mtype_reg, Register mh_reg, Register temp_reg, Label& wrong_method_type);
   RegisterOrConstant argument_offset(RegisterOrConstant arg_slot, Register temp_reg, int extra_slot_offset = 0);
   // Biased locking support
   // Upon entry,obj_reg must contain the target object, and mark_reg
   // must contain the target object's header.
   // Destroys mark_reg if an attempt is made to bias an anonymously
   // biased lock. In this case a failure will go either to the slow
   // case or fall through with the notEqual condition code set with
   // the expectation that the slow case in the runtime will be called.
   // In the fall-through case where the CAS-based lock is done,
   // mark_reg is not destroyed.
   void biased_locking_enter(ConditionRegister cr_reg, Register obj_reg, Register mark_reg, Register temp_reg,
                             Register temp2_reg, Label& done, Label* slow_case = NULL);
   // Upon entry, the base register of mark_addr must contain the oop.
   // Destroys temp_reg.
   // If allow_delay_slot_filling is set to true, the next instruction
   // emitted after this one will go in an annulled delay slot if the
   // biased locking exit case failed.
   void biased_locking_exit(ConditionRegister cr_reg, Register mark_addr, Register temp_reg, Label& done);
   void compiler_fast_lock_object(  ConditionRegister flag, Register oop, Register box, Register tmp1, Register tmp2, Register tmp3);
   void compiler_fast_unlock_object(ConditionRegister flag, Register oop, Register box, Register tmp1, Register tmp2, Register tmp3);
   // Support for serializing memory accesses between threads
   void serialize_memory(Register thread, Register tmp1, Register tmp2);
   // GC barrier support.
   void card_write_barrier_post(Register Rstore_addr, Register Rnew_val, Register Rtmp);
   void card_table_write(jbyte* byte_map_base, Register Rtmp, Register Robj);
 #if INCLUDE_ALL_GCS
   // General G1 pre-barrier generator.
   void g1_write_barrier_pre(Register Robj, RegisterOrConstant offset, Register Rpre_val,
                             Register Rtmp1, Register Rtmp2, bool needs_frame = false);
   // General G1 post-barrier generator
   void g1_write_barrier_post(Register Rstore_addr, Register Rnew_val, Register Rtmp1,
                              Register Rtmp2, Register Rtmp3, Label *filtered_ext = NULL);
 #endif
   // Support for managing the JavaThread pointer (i.e.; the reference to
   // thread-local information).
   // Support for last Java frame (but use call_VM instead where possible):
   // access R16_thread->last_Java_sp.
   void set_last_Java_frame(Register last_java_sp, Register last_Java_pc);
   void reset_last_Java_frame(void);
   void set_top_ijava_frame_at_SP_as_last_Java_frame(Register sp, Register tmp1);
   // Read vm result from thread: oop_result = R16_thread->result;
   void get_vm_result  (Register oop_result);
   void get_vm_result_2(Register metadata_result);
   static bool needs_explicit_null_check(intptr_t offset);
   // Trap-instruction-based checks.
   // Range checks can be distinguished from zero checks as they check 32 bit,
   // zero checks all 64 bits (tw, td).
   inline void trap_null_check(Register a, trap_to_bits cmp = traptoEqual);
   static bool is_trap_null_check(int x) {
     return is_tdi(x, traptoEqual,               -1/*any reg*/, 0) ||
            is_tdi(x, traptoGreaterThanUnsigned, -1/*any reg*/, 0);
   }
   inline void trap_zombie_not_entrant();
   static bool is_trap_zombie_not_entrant(int x) { return is_tdi(x, traptoUnconditional, 0/*reg 0*/, 1); }
   inline void trap_should_not_reach_here();
   static bool is_trap_should_not_reach_here(int x) { return is_tdi(x, traptoUnconditional, 0/*reg 0*/, 2); }
   inline void trap_ic_miss_check(Register a, Register b);
   static bool is_trap_ic_miss_check(int x) {
     return is_td(x, traptoGreaterThanUnsigned | traptoLessThanUnsigned, -1/*any reg*/, -1/*any reg*/);
   }
   // Implicit or explicit null check, jumps to static address exception_entry.
   inline void null_check_throw(Register a, int offset, Register temp_reg, address exception_entry);
   // Check accessed object for null. Use SIGTRAP-based null checks on AIX.
   inline void load_with_trap_null_check(Register d, int si16, Register s1);
   // Load heap oop and decompress. Loaded oop may not be null.
   inline void load_heap_oop_not_null(Register d, RegisterOrConstant offs, Register s1 = noreg);
   inline void store_heap_oop_not_null(Register d, RegisterOrConstant offs, Register s1,
                                       /*specify if d must stay uncompressed*/ Register tmp = noreg);
   // Null allowed.
   inline void load_heap_oop(Register d, RegisterOrConstant offs, Register s1 = noreg);
   // Encode/decode heap oop. Oop may not be null, else en/decoding goes wrong.
   inline Register encode_heap_oop_not_null(Register d, Register src = noreg);
   inline void decode_heap_oop_not_null(Register d);
   // Null allowed.
   inline void decode_heap_oop(Register d);
   // Load/Store klass oop from klass field. Compress.
   void load_klass(Register dst, Register src);
   void load_klass_with_trap_null_check(Register dst, Register src);
   void store_klass(Register dst_oop, Register klass, Register tmp = R0);
   void store_klass_gap(Register dst_oop, Register val = noreg); // Will store 0 if val not specified.
   static int instr_size_for_decode_klass_not_null();
   void decode_klass_not_null(Register dst, Register src = noreg);
   void encode_klass_not_null(Register dst, Register src = noreg);
   // Load common heap base into register.
   void reinit_heapbase(Register d, Register tmp = noreg);
   // SIGTRAP-based range checks for arrays.
   inline void trap_range_check_l(Register a, Register b);
   inline void trap_range_check_l(Register a, int si16);
   static bool is_trap_range_check_l(int x) {
     return (is_tw (x, traptoLessThanUnsigned, -1/*any reg*/, -1/*any reg*/) ||
             is_twi(x, traptoLessThanUnsigned, -1/*any reg*/)                  );
   }
   inline void trap_range_check_le(Register a, int si16);
   static bool is_trap_range_check_le(int x) {
     return is_twi(x, traptoEqual | traptoLessThanUnsigned, -1/*any reg*/);
   }
   inline void trap_range_check_g(Register a, int si16);
   static bool is_trap_range_check_g(int x) {
     return is_twi(x, traptoGreaterThanUnsigned, -1/*any reg*/);
   }
   inline void trap_range_check_ge(Register a, Register b);
   inline void trap_range_check_ge(Register a, int si16);
   static bool is_trap_range_check_ge(int x) {
     return (is_tw (x, traptoEqual | traptoGreaterThanUnsigned, -1/*any reg*/, -1/*any reg*/) ||
             is_twi(x, traptoEqual | traptoGreaterThanUnsigned, -1/*any reg*/)                  );
   }
   static bool is_trap_range_check(int x) {
     return is_trap_range_check_l(x) || is_trap_range_check_le(x) ||
            is_trap_range_check_g(x) || is_trap_range_check_ge(x);
   }
   void clear_memory_doubleword(Register base_ptr, Register cnt_dwords, Register tmp = R0);
   // Needle of length 1.
   void string_indexof_1(Register result, Register haystack, Register haycnt,
                         Register needle, jchar needleChar,
                         Register tmp1, Register tmp2);
   // General indexof, eventually with constant needle length.
   void string_indexof(Register result, Register haystack, Register haycnt,
                       Register needle, ciTypeArray* needle_values, Register needlecnt, int needlecntval,
                       Register tmp1, Register tmp2, Register tmp3, Register tmp4);
   void string_compare(Register str1_reg, Register str2_reg, Register cnt1_reg, Register cnt2_reg,
                       Register result_reg, Register tmp_reg);
   void char_arrays_equals(Register str1_reg, Register str2_reg, Register cnt_reg, Register result_reg,
                           Register tmp1_reg, Register tmp2_reg, Register tmp3_reg, Register tmp4_reg,
                           Register tmp5_reg);
   void char_arrays_equalsImm(Register str1_reg, Register str2_reg, int cntval, Register result_reg,
                              Register tmp1_reg, Register tmp2_reg);
   //
   // Debugging
   //
   // assert on cr0
   void asm_assert(bool check_equal, const char* msg, int id);
   void asm_assert_eq(const char* msg, int id) { asm_assert(true, msg, id); }
   void asm_assert_ne(const char* msg, int id) { asm_assert(false, msg, id); }
  private:
   void asm_assert_mems_zero(bool check_equal, int size, int mem_offset, Register mem_base,
                             const char* msg, int id);
  public:
   void asm_assert_mem8_is_zero(int mem_offset, Register mem_base, const char* msg, int id) {
     asm_assert_mems_zero(true,  8, mem_offset, mem_base, msg, id);
   }
   void asm_assert_mem8_isnot_zero(int mem_offset, Register mem_base, const char* msg, int id) {
     asm_assert_mems_zero(false, 8, mem_offset, mem_base, msg, id);
   }
   // Verify R16_thread contents.
   void verify_thread();
   // Emit code to verify that reg contains a valid oop if +VerifyOops is set.
   void verify_oop(Register reg, const char* s = "broken oop");
   // TODO: verify method and klass metadata (compare against vptr?)
   void _verify_method_ptr(Register reg, const char * msg, const char * file, int line) {}
   void _verify_klass_ptr(Register reg, const char * msg, const char * file, int line) {}
   // Convenience method returning function entry. For the ELFv1 case
   // creates function descriptor at the current address and returs
   // the pointer to it. For the ELFv2 case returns the current address.
   inline address function_entry();
 #define verify_method_ptr(reg) _verify_method_ptr(reg, "broken method " #reg, __FILE__, __LINE__)
 #define verify_klass_ptr(reg) _verify_klass_ptr(reg, "broken klass " #reg, __FILE__, __LINE__)
  private:
   enum {
     stop_stop                = 0,
     stop_untested            = 1,
     stop_unimplemented       = 2,
     stop_shouldnotreachhere  = 3,
     stop_end                 = 4
   };
   void stop(int type, const char* msg, int id);
  public:
   // Prints msg, dumps registers and stops execution.
   void stop         (const char* msg = "", int id = 0) { stop(stop_stop,               msg, id); }
   void untested     (const char* msg = "", int id = 0) { stop(stop_untested,           msg, id); }
   void unimplemented(const char* msg = "", int id = 0) { stop(stop_unimplemented,      msg, id); }
   void should_not_reach_here()                         { stop(stop_shouldnotreachhere,  "", -1); }
   void zap_from_to(Register low, int before, Register high, int after, Register val, Register addr) PRODUCT_RETURN;
 };
 // class SkipIfEqualZero:
 //
 // Instantiating this class will result in assembly code being output that will
 // jump around any code emitted between the creation of the instance and it's
 // automatic destruction at the end of a scope block, depending on the value of
 // the flag passed to the constructor, which will be checked at run-time.
 class SkipIfEqualZero : public StackObj {
  private:
   MacroAssembler* _masm;
   Label _label;
  public:
    // 'Temp' is a temp register that this object can use (and trash).
    explicit SkipIfEqualZero(MacroAssembler*, Register temp, const bool* flag_addr);
    ~SkipIfEqualZero();
 };
 #endif // CPU_PPC_VM_MACROASSEMBLER_PPC_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/ppc/vm/macroAssembler_ppc.hpp@710a3c8b516e (annotated)

src/cpu/ppc/vm/macroAssembler_ppc.hpp