/* * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved. * Copyright 2012, 2013 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); #ifndef SERIALGC // 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 // SERIALGC // 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); // 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 void encode_heap_oop_not_null(Register d); 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); 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; }; #endif // CPU_PPC_VM_MACROASSEMBLER_PPC_HPP