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 /*

  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. 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_X86_VM_MACROASSEMBLER_X86_HPP

 #define CPU_X86_VM_MACROASSEMBLER_X86_HPP

 #include "asm/assembler.hpp"

 #include "utilities/macros.hpp"

 // MacroAssembler extends Assembler by frequently used macros.

 //

 // Instructions for which a 'better' code sequence exists depending

 // on arguments should also go in here.

 class MacroAssembler: public Assembler {

   friend class LIR_Assembler;

   friend class Runtime1;      // as_Address()

  protected:

   Address as_Address(AddressLiteral adr);

   Address as_Address(ArrayAddress adr);

   // 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).

 #ifdef CC_INTERP

   // c++ interpreter never wants to use interp_masm version of call_VM

   #define VIRTUAL

 #else

   #define VIRTUAL virtual

 #endif

   VIRTUAL void call_VM_leaf_base(

     address entry_point,               // the entry point

     int     number_of_arguments        // the number of arguments to pop after the call

   );

   // 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 java_thread register is specified (noreg) than rdi will be used instead. call_VM_base

   // returns the register which contains the thread upon return. If a thread register has been

   // specified, the return value will correspond to that register. If no last_java_sp is specified

   // (noreg) than rsp will be used instead.

   VIRTUAL void call_VM_base(           // returns the register containing the thread upon return

     Register oop_result,               // where an oop-result ends up if any; use noreg otherwise

     Register java_thread,              // the thread if computed before     ; use noreg otherwise

     Register last_java_sp,             // to set up last_Java_frame in stubs; use noreg otherwise

     address  entry_point,              // the entry point

     int      number_of_arguments,      // the number of arguments (w/o thread) to pop after the call

     bool     check_exceptions          // whether to check for pending exceptions after return

   );

   // These routines should emit JVMTI PopFrame and ForceEarlyReturn handling code.

   // The implementation is only non-empty for the InterpreterMacroAssembler,

   // as only the interpreter handles PopFrame and ForceEarlyReturn requests.

   virtual void check_and_handle_popframe(Register java_thread);

   virtual void check_and_handle_earlyret(Register java_thread);

   void call_VM_helper(Register oop_result, address entry_point, int number_of_arguments, bool check_exceptions = true);

   // helpers for FPU flag access

   // tmp is a temporary register, if none is available use noreg

   void save_rax   (Register tmp);

   void restore_rax(Register tmp);

  public:

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

   // 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).

   void null_check(Register reg, int offset = -1);

   static bool needs_explicit_null_check(intptr_t offset);

   // Required platform-specific helpers for Label::patch_instructions.

   // They _shadow_ the declarations in AbstractAssembler, which are undefined.

   void pd_patch_instruction(address branch, address target) {

     unsigned char op = branch[0];

     assert(op == 0xE8 /* call */ ||

         op == 0xE9 /* jmp */ ||

         op == 0xEB /* short jmp */ ||

         (op & 0xF0) == 0x70 /* short jcc */ ||

         op == 0x0F && (branch[1] & 0xF0) == 0x80 /* jcc */,

         "Invalid opcode at patch point");

     if (op == 0xEB || (op & 0xF0) == 0x70) {

       // short offset operators (jmp and jcc)

       char* disp = (char*) &branch[1];

       int imm8 = target - (address) &disp[1];

       guarantee(this->is8bit(imm8), "Short forward jump exceeds 8-bit offset");

       *disp = imm8;

     } else {

       int* disp = (int*) &branch[(op == 0x0F)? 2: 1];

       int imm32 = target - (address) &disp[1];

       *disp = imm32;

     }

   }

   // The following 4 methods return the offset of the appropriate move instruction

   // Support for fast byte/short loading with zero extension (depending on particular CPU)

   int load_unsigned_byte(Register dst, Address src);

   int load_unsigned_short(Register dst, Address src);

   // Support for fast byte/short loading with sign extension (depending on particular CPU)

   int load_signed_byte(Register dst, Address src);

   int load_signed_short(Register dst, Address src);

   // Support for sign-extension (hi:lo = extend_sign(lo))

   void extend_sign(Register hi, Register lo);

   // Load and store values by size and signed-ness

   void load_sized_value(Register dst, Address src, size_t size_in_bytes, bool is_signed, Register dst2 = noreg);

   void store_sized_value(Address dst, Register src, size_t size_in_bytes, Register src2 = noreg);

   // Support for inc/dec with optimal instruction selection depending on value

   void increment(Register reg, int value = 1) { LP64_ONLY(incrementq(reg, value)) NOT_LP64(incrementl(reg, value)) ; }

   void decrement(Register reg, int value = 1) { LP64_ONLY(decrementq(reg, value)) NOT_LP64(decrementl(reg, value)) ; }

   void decrementl(Address dst, int value = 1);

   void decrementl(Register reg, int value = 1);

   void decrementq(Register reg, int value = 1);

   void decrementq(Address dst, int value = 1);

   void incrementl(Address dst, int value = 1);

   void incrementl(Register reg, int value = 1);

   void incrementq(Register reg, int value = 1);

   void incrementq(Address dst, int value = 1);

   // Support optimal SSE move instructions.

   void movflt(XMMRegister dst, XMMRegister src) {

     if (UseXmmRegToRegMoveAll) { movaps(dst, src); return; }

     else                       { movss (dst, src); return; }

   }

   void movflt(XMMRegister dst, Address src) { movss(dst, src); }

   void movflt(XMMRegister dst, AddressLiteral src);

   void movflt(Address dst, XMMRegister src) { movss(dst, src); }

   void movdbl(XMMRegister dst, XMMRegister src) {

     if (UseXmmRegToRegMoveAll) { movapd(dst, src); return; }

     else                       { movsd (dst, src); return; }

   }

   void movdbl(XMMRegister dst, AddressLiteral src);

   void movdbl(XMMRegister dst, Address src) {

     if (UseXmmLoadAndClearUpper) { movsd (dst, src); return; }

     else                         { movlpd(dst, src); return; }

   }

   void movdbl(Address dst, XMMRegister src) { movsd(dst, src); }

   void incrementl(AddressLiteral dst);

   void incrementl(ArrayAddress dst);

   // Alignment

   void align(int modulus);

   // A 5 byte nop that is safe for patching (see patch_verified_entry)

   void fat_nop();

   // Stack frame creation/removal

   void enter();

   void leave();

   // Support for getting the JavaThread pointer (i.e.; a reference to thread-local information)

   // The pointer will be loaded into the thread register.

   void get_thread(Register thread);

   // Support for VM calls

   //

   // 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.

   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);

   // Overloadings with last_Java_sp

   void call_VM(Register oop_result,

                Register last_java_sp,

                address entry_point,

                int number_of_arguments = 0,

                bool check_exceptions = true);

   void call_VM(Register oop_result,

                Register last_java_sp,

                address entry_point,

                Register arg_1, bool

                check_exceptions = true);

   void call_VM(Register oop_result,

                Register last_java_sp,

                address entry_point,

                Register arg_1, Register arg_2,

                bool check_exceptions = true);

   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);

   void get_vm_result  (Register oop_result, Register thread);

   void get_vm_result_2(Register metadata_result, Register thread);

   // These always tightly bind to MacroAssembler::call_VM_base

   // bypassing the virtual implementation

   void super_call_VM(Register oop_result, Register last_java_sp, address entry_point, int number_of_arguments = 0, bool check_exceptions = true);

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

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

   void super_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);

   void super_call_VM(Register oop_result, Register last_java_sp, address entry_point, Register arg_1, Register arg_2, Register arg_3, Register arg_4, bool check_exceptions = true);

   void call_VM_leaf(address entry_point,

                     int number_of_arguments = 0);

   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);

   // These always tightly bind to MacroAssembler::call_VM_leaf_base

   // bypassing the virtual implementation

   void super_call_VM_leaf(address entry_point);

   void super_call_VM_leaf(address entry_point, Register arg_1);

   void super_call_VM_leaf(address entry_point, Register arg_1, Register arg_2);

   void super_call_VM_leaf(address entry_point, Register arg_1, Register arg_2, Register arg_3);

   void super_call_VM_leaf(address entry_point, Register arg_1, Register arg_2, Register arg_3, Register arg_4);

   // last Java Frame (fills frame anchor)

   void set_last_Java_frame(Register thread,

                            Register last_java_sp,

                            Register last_java_fp,

                            address last_java_pc);

   // thread in the default location (r15_thread on 64bit)

   void set_last_Java_frame(Register last_java_sp,

                            Register last_java_fp,

                            address last_java_pc);

   void reset_last_Java_frame(Register thread, bool clear_fp, bool clear_pc);

   // thread in the default location (r15_thread on 64bit)

   void reset_last_Java_frame(bool clear_fp, bool clear_pc);

   // Stores

   void store_check(Register obj);                // store check for obj - register is destroyed afterwards

   void store_check(Register obj, Address dst);   // same as above, dst is exact store location (reg. is destroyed)

 #if INCLUDE_ALL_GCS

   void g1_write_barrier_pre(Register obj,

                             Register pre_val,

                             Register thread,

                             Register tmp,

                             bool tosca_live,

                             bool expand_call);

   void g1_write_barrier_post(Register store_addr,

                              Register new_val,

                              Register thread,

                              Register tmp,

                              Register tmp2);

 #endif // INCLUDE_ALL_GCS

   // split store_check(Register obj) to enhance instruction interleaving

   void store_check_part_1(Register obj);

   void store_check_part_2(Register obj);

   // C 'boolean' to Java boolean: x == 0 ? 0 : 1

   void c2bool(Register x);

   // C++ bool manipulation

   void movbool(Register dst, Address src);

   void movbool(Address dst, bool boolconst);

   void movbool(Address dst, Register src);

   void testbool(Register dst);

   // oop manipulations

   void load_klass(Register dst, Register src);

   void store_klass(Register dst, Register src);

   void load_heap_oop(Register dst, Address src);

   void load_heap_oop_not_null(Register dst, Address src);

   void store_heap_oop(Address dst, Register src);

   void cmp_heap_oop(Register src1, Address src2, Register tmp = noreg);

   // Used for storing NULL. All other oop constants should be

   // stored using routines that take a jobject.

   void store_heap_oop_null(Address dst);

   void load_prototype_header(Register dst, Register src);

 #ifdef _LP64

   void store_klass_gap(Register dst, Register src);

   // This dummy is to prevent a call to store_heap_oop from

   // converting a zero (like NULL) into a Register by giving

   // the compiler two choices it can't resolve

   void store_heap_oop(Address dst, void* dummy);

   void encode_heap_oop(Register r);

   void decode_heap_oop(Register r);

   void encode_heap_oop_not_null(Register r);

   void decode_heap_oop_not_null(Register r);

   void encode_heap_oop_not_null(Register dst, Register src);

   void decode_heap_oop_not_null(Register dst, Register src);

   void set_narrow_oop(Register dst, jobject obj);

   void set_narrow_oop(Address dst, jobject obj);

   void cmp_narrow_oop(Register dst, jobject obj);

   void cmp_narrow_oop(Address dst, jobject obj);

   void encode_klass_not_null(Register r);

   void decode_klass_not_null(Register r);

   void encode_klass_not_null(Register dst, Register src);

   void decode_klass_not_null(Register dst, Register src);

   void set_narrow_klass(Register dst, Klass* k);

   void set_narrow_klass(Address dst, Klass* k);

   void cmp_narrow_klass(Register dst, Klass* k);

   void cmp_narrow_klass(Address dst, Klass* k);

   // if heap base register is used - reinit it with the correct value

   void reinit_heapbase();

   DEBUG_ONLY(void verify_heapbase(const char* msg);)

 #endif // _LP64

   // Int division/remainder for Java

   // (as idivl, but checks for special case as described in JVM spec.)

   // returns idivl instruction offset for implicit exception handling

   int corrected_idivl(Register reg);

   // Long division/remainder for Java

   // (as idivq, but checks for special case as described in JVM spec.)

   // returns idivq instruction offset for implicit exception handling

   int corrected_idivq(Register reg);

   void int3();

   // Long operation macros for a 32bit cpu

   // Long negation for Java

   void lneg(Register hi, Register lo);

   // Long multiplication for Java

   // (destroys contents of eax, ebx, ecx and edx)

   void lmul(int x_rsp_offset, int y_rsp_offset); // rdx:rax = x * y

   // Long shifts for Java

   // (semantics as described in JVM spec.)

   void lshl(Register hi, Register lo);                               // hi:lo << (rcx & 0x3f)

   void lshr(Register hi, Register lo, bool sign_extension = false);  // hi:lo >> (rcx & 0x3f)

   // Long compare for Java

   // (semantics as described in JVM spec.)

   void lcmp2int(Register x_hi, Register x_lo, Register y_hi, Register y_lo); // x_hi = lcmp(x, y)

   // misc

   // Sign extension

   void sign_extend_short(Register reg);

   void sign_extend_byte(Register reg);

   // Division by power of 2, rounding towards 0

   void division_with_shift(Register reg, int shift_value);

   // Compares the top-most stack entries on the FPU stack and sets the eflags as follows:

   //

   // CF (corresponds to C0) if x < y

   // PF (corresponds to C2) if unordered

   // ZF (corresponds to C3) if x = y

   //

   // The arguments are in reversed order on the stack (i.e., top of stack is first argument).

   // tmp is a temporary register, if none is available use noreg (only matters for non-P6 code)

   void fcmp(Register tmp);

   // Variant of the above which allows y to be further down the stack

   // and which only pops x and y if specified. If pop_right is

   // specified then pop_left must also be specified.

   void fcmp(Register tmp, int index, bool pop_left, bool pop_right);

   // Floating-point comparison for Java

   // Compares the top-most stack entries on the FPU stack and stores the result in dst.

   // The arguments are in reversed order on the stack (i.e., top of stack is first argument).

   // (semantics as described in JVM spec.)

   void fcmp2int(Register dst, bool unordered_is_less);

   // Variant of the above which allows y to be further down the stack

   // and which only pops x and y if specified. If pop_right is

   // specified then pop_left must also be specified.

   void fcmp2int(Register dst, bool unordered_is_less, int index, bool pop_left, bool pop_right);

   // Floating-point remainder for Java (ST0 = ST0 fremr ST1, ST1 is empty afterwards)

   // tmp is a temporary register, if none is available use noreg

   void fremr(Register tmp);

   // same as fcmp2int, but using SSE2

   void cmpss2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less);

   void cmpsd2int(XMMRegister opr1, XMMRegister opr2, Register dst, bool unordered_is_less);

   // Inlined sin/cos generator for Java; must not use CPU instruction

   // directly on Intel as it does not have high enough precision

   // outside of the range [-pi/4, pi/4]. Extra argument indicate the

   // number of FPU stack slots in use; all but the topmost will

   // require saving if a slow case is necessary. Assumes argument is

   // on FP TOS; result is on FP TOS.  No cpu registers are changed by

   // this code.

   void trigfunc(char trig, int num_fpu_regs_in_use = 1);

   // branch to L if FPU flag C2 is set/not set

   // tmp is a temporary register, if none is available use noreg

   void jC2 (Register tmp, Label& L);

   void jnC2(Register tmp, Label& L);

   // Pop ST (ffree & fincstp combined)

   void fpop();

   // pushes double TOS element of FPU stack on CPU stack; pops from FPU stack

   void push_fTOS();

   // pops double TOS element from CPU stack and pushes on FPU stack

   void pop_fTOS();

   void empty_FPU_stack();

   void push_IU_state();

   void pop_IU_state();

   void push_FPU_state();

   void pop_FPU_state();

   void push_CPU_state();

   void pop_CPU_state();

   // Round up to a power of two

   void round_to(Register reg, int modulus);

   // Callee saved registers handling

   void push_callee_saved_registers();

   void pop_callee_saved_registers();

   // allocation

   void eden_allocate(

     Register obj,                      // result: pointer to object after successful allocation

     Register var_size_in_bytes,        // object size in bytes if unknown at compile time; invalid otherwise

     int      con_size_in_bytes,        // object size in bytes if   known at compile time

     Register t1,                       // temp register

     Label&   slow_case                 // continuation point if fast allocation fails

   );

   void tlab_allocate(

     Register obj,                      // result: pointer to object after successful allocation

     Register var_size_in_bytes,        // object size in bytes if unknown at compile time; invalid otherwise

     int      con_size_in_bytes,        // object size in bytes if   known at compile time

     Register t1,                       // temp register

     Register t2,                       // temp register

     Label&   slow_case                 // continuation point if fast allocation fails

   );

   Register tlab_refill(Label& retry_tlab, Label& try_eden, Label& slow_case); // returns TLS address

   void incr_allocated_bytes(Register thread,

                             Register var_size_in_bytes, int con_size_in_bytes,

                             Register t1 = noreg);

   // interface method calling

   void lookup_interface_method(Register recv_klass,

                                Register intf_klass,

                                RegisterOrConstant itable_index,

                                Register method_result,

                                Register scan_temp,

                                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.

   void check_klass_subtype_fast_path(Register sub_klass,

                                      Register super_klass,

                                      Register temp_reg,

                                      Label* L_success,

                                      Label* L_failure,

                                      Label* L_slow_path,

                 RegisterOrConstant super_check_offset = RegisterOrConstant(-1));

   // 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 and temp2_reg can be noreg, if no temps are available.

   // Updates the sub's secondary super cache as necessary.

   // If set_cond_codes, condition codes will be Z on success, NZ on failure.

   void check_klass_subtype_slow_path(Register sub_klass,

                                      Register super_klass,

                                      Register temp_reg,

                                      Register temp2_reg,

                                      Label* L_success,

                                      Label* L_failure,

                                      bool set_cond_codes = false);

   // Simplified, combined version, good for typical uses.

   // Falls through on failure.

   void check_klass_subtype(Register sub_klass,

                            Register super_klass,

                            Register temp_reg,

                            Label& L_success);

   // method handles (JSR 292)

   Address argument_address(RegisterOrConstant arg_slot, int extra_slot_offset = 0);

   //----

   void set_word_if_not_zero(Register reg); // sets reg to 1 if not zero, otherwise 0

   // Debugging

   // only if +VerifyOops

   // TODO: Make these macros with file and line like sparc version!

   void verify_oop(Register reg, const char* s = "broken oop");

   void verify_oop_addr(Address addr, const char * s = "broken oop addr");

   // 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){}

 #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__)

   // only if +VerifyFPU

   void verify_FPU(int stack_depth, const char* s = "illegal FPU state");

   // prints msg, dumps registers and stops execution

   void stop(const char* msg);

   // prints msg and continues

   void warn(const char* msg);

   // dumps registers and other state

   void print_state();

   static void debug32(int rdi, int rsi, int rbp, int rsp, int rbx, int rdx, int rcx, int rax, int eip, char* msg);

   static void debug64(char* msg, int64_t pc, int64_t regs[]);

   static void print_state32(int rdi, int rsi, int rbp, int rsp, int rbx, int rdx, int rcx, int rax, int eip);

   static void print_state64(int64_t pc, int64_t regs[]);

   void os_breakpoint();

   void untested()                                { stop("untested"); }

   void unimplemented(const char* what = "")      { char* b = new char[1024];  jio_snprintf(b, 1024, "unimplemented: %s", what);  stop(b); }

   void should_not_reach_here()                   { stop("should not reach here"); }

   void print_CPU_state();

   // Stack overflow checking

   void bang_stack_with_offset(int offset) {

     // stack grows down, caller passes positive offset

     assert(offset > 0, "must bang with negative offset");

     movl(Address(rsp, (-offset)), rax);

   }

   // Writes to stack successive pages until offset reached to check for

   // stack overflow + shadow pages.  Also, clobbers tmp

   void bang_stack_size(Register size, Register tmp);

   virtual RegisterOrConstant delayed_value_impl(intptr_t* delayed_value_addr,

                                                 Register tmp,

                                                 int offset);

   // Support for serializing memory accesses between threads

   void serialize_memory(Register thread, Register tmp);

   void verify_tlab();

   // Biased locking support

   // lock_reg and obj_reg must be loaded up with the appropriate values.

   // swap_reg must be rax, and is killed.

   // tmp_reg is optional. If it is supplied (i.e., != noreg) it will

   // be killed; if not supplied, push/pop will be used internally to

   // allocate a temporary (inefficient, avoid if possible).

   // Optional slow case is for implementations (interpreter and C1) which branch to

   // slow case directly. Leaves condition codes set for C2's Fast_Lock node.

   // Returns offset of first potentially-faulting instruction for null

   // check info (currently consumed only by C1). If

   // swap_reg_contains_mark is true then returns -1 as it is assumed

   // the calling code has already passed any potential faults.

   int biased_locking_enter(Register lock_reg, Register obj_reg,

                            Register swap_reg, Register tmp_reg,

                            bool swap_reg_contains_mark,

                            Label& done, Label* slow_case = NULL,

                            BiasedLockingCounters* counters = NULL);

   void biased_locking_exit (Register obj_reg, Register temp_reg, Label& done);

   Condition negate_condition(Condition cond);

   // Instructions that use AddressLiteral operands. These instruction can handle 32bit/64bit

   // operands. In general the names are modified to avoid hiding the instruction in Assembler

   // so that we don't need to implement all the varieties in the Assembler with trivial wrappers

   // here in MacroAssembler. The major exception to this rule is call

   // Arithmetics

   void addptr(Address dst, int32_t src) { LP64_ONLY(addq(dst, src)) NOT_LP64(addl(dst, src)) ; }

   void addptr(Address dst, Register src);

   void addptr(Register dst, Address src) { LP64_ONLY(addq(dst, src)) NOT_LP64(addl(dst, src)); }

   void addptr(Register dst, int32_t src);

   void addptr(Register dst, Register src);

   void addptr(Register dst, RegisterOrConstant src) {

     if (src.is_constant()) addptr(dst, (int) src.as_constant());

     else                   addptr(dst,       src.as_register());

   }

   void andptr(Register dst, int32_t src);

   void andptr(Register src1, Register src2) { LP64_ONLY(andq(src1, src2)) NOT_LP64(andl(src1, src2)) ; }

   void cmp8(AddressLiteral src1, int imm);

   // renamed to drag out the casting of address to int32_t/intptr_t

   void cmp32(Register src1, int32_t imm);

   void cmp32(AddressLiteral src1, int32_t imm);

   // compare reg - mem, or reg - &mem

   void cmp32(Register src1, AddressLiteral src2);

   void cmp32(Register src1, Address src2);

 #ifndef _LP64

   void cmpklass(Address dst, Metadata* obj);

   void cmpklass(Register dst, Metadata* obj);

   void cmpoop(Address dst, jobject obj);

   void cmpoop(Register dst, jobject obj);

 #endif // _LP64

   // NOTE src2 must be the lval. This is NOT an mem-mem compare

   void cmpptr(Address src1, AddressLiteral src2);

   void cmpptr(Register src1, AddressLiteral src2);

   void cmpptr(Register src1, Register src2) { LP64_ONLY(cmpq(src1, src2)) NOT_LP64(cmpl(src1, src2)) ; }

   void cmpptr(Register src1, Address src2) { LP64_ONLY(cmpq(src1, src2)) NOT_LP64(cmpl(src1, src2)) ; }

   // void cmpptr(Address src1, Register src2) { LP64_ONLY(cmpq(src1, src2)) NOT_LP64(cmpl(src1, src2)) ; }

   void cmpptr(Register src1, int32_t src2) { LP64_ONLY(cmpq(src1, src2)) NOT_LP64(cmpl(src1, src2)) ; }

   void cmpptr(Address src1, int32_t src2) { LP64_ONLY(cmpq(src1, src2)) NOT_LP64(cmpl(src1, src2)) ; }

   // cmp64 to avoild hiding cmpq

   void cmp64(Register src1, AddressLiteral src);

   void cmpxchgptr(Register reg, Address adr);

   void locked_cmpxchgptr(Register reg, AddressLiteral adr);

   void imulptr(Register dst, Register src) { LP64_ONLY(imulq(dst, src)) NOT_LP64(imull(dst, src)); }

   void negptr(Register dst) { LP64_ONLY(negq(dst)) NOT_LP64(negl(dst)); }

   void notptr(Register dst) { LP64_ONLY(notq(dst)) NOT_LP64(notl(dst)); }

   void shlptr(Register dst, int32_t shift);

   void shlptr(Register dst) { LP64_ONLY(shlq(dst)) NOT_LP64(shll(dst)); }

   void shrptr(Register dst, int32_t shift);

   void shrptr(Register dst) { LP64_ONLY(shrq(dst)) NOT_LP64(shrl(dst)); }

   void sarptr(Register dst) { LP64_ONLY(sarq(dst)) NOT_LP64(sarl(dst)); }

   void sarptr(Register dst, int32_t src) { LP64_ONLY(sarq(dst, src)) NOT_LP64(sarl(dst, src)); }

   void subptr(Address dst, int32_t src) { LP64_ONLY(subq(dst, src)) NOT_LP64(subl(dst, src)); }

   void subptr(Register dst, Address src) { LP64_ONLY(subq(dst, src)) NOT_LP64(subl(dst, src)); }

   void subptr(Register dst, int32_t src);

   // Force generation of a 4 byte immediate value even if it fits into 8bit

   void subptr_imm32(Register dst, int32_t src);

   void subptr(Register dst, Register src);

   void subptr(Register dst, RegisterOrConstant src) {

     if (src.is_constant()) subptr(dst, (int) src.as_constant());

     else                   subptr(dst,       src.as_register());

   }

   void sbbptr(Address dst, int32_t src) { LP64_ONLY(sbbq(dst, src)) NOT_LP64(sbbl(dst, src)); }

   void sbbptr(Register dst, int32_t src) { LP64_ONLY(sbbq(dst, src)) NOT_LP64(sbbl(dst, src)); }

   void xchgptr(Register src1, Register src2) { LP64_ONLY(xchgq(src1, src2)) NOT_LP64(xchgl(src1, src2)) ; }

   void xchgptr(Register src1, Address src2) { LP64_ONLY(xchgq(src1, src2)) NOT_LP64(xchgl(src1, src2)) ; }

   void xaddptr(Address src1, Register src2) { LP64_ONLY(xaddq(src1, src2)) NOT_LP64(xaddl(src1, src2)) ; }

   // Helper functions for statistics gathering.

   // Conditionally (atomically, on MPs) increments passed counter address, preserving condition codes.

   void cond_inc32(Condition cond, AddressLiteral counter_addr);

   // Unconditional atomic increment.

   void atomic_incl(AddressLiteral counter_addr);

   void lea(Register dst, AddressLiteral adr);

   void lea(Address dst, AddressLiteral adr);

   void lea(Register dst, Address adr) { Assembler::lea(dst, adr); }

   void leal32(Register dst, Address src) { leal(dst, src); }

   // Import other testl() methods from the parent class or else

   // they will be hidden by the following overriding declaration.

   using Assembler::testl;

   void testl(Register dst, AddressLiteral src);

   void orptr(Register dst, Address src) { LP64_ONLY(orq(dst, src)) NOT_LP64(orl(dst, src)); }

   void orptr(Register dst, Register src) { LP64_ONLY(orq(dst, src)) NOT_LP64(orl(dst, src)); }

   void orptr(Register dst, int32_t src) { LP64_ONLY(orq(dst, src)) NOT_LP64(orl(dst, src)); }

   void testptr(Register src, int32_t imm32) {  LP64_ONLY(testq(src, imm32)) NOT_LP64(testl(src, imm32)); }

   void testptr(Register src1, Register src2);

   void xorptr(Register dst, Register src) { LP64_ONLY(xorq(dst, src)) NOT_LP64(xorl(dst, src)); }

   void xorptr(Register dst, Address src) { LP64_ONLY(xorq(dst, src)) NOT_LP64(xorl(dst, src)); }

   // Calls

   void call(Label& L, relocInfo::relocType rtype);

   void call(Register entry);

   // NOTE: this call tranfers to the effective address of entry NOT

   // the address contained by entry. This is because this is more natural

   // for jumps/calls.

   void call(AddressLiteral entry);

   // Emit the CompiledIC call idiom

   void ic_call(address entry);

   // Jumps

   // NOTE: these jumps tranfer to the effective address of dst NOT

   // the address contained by dst. This is because this is more natural

   // for jumps/calls.

   void jump(AddressLiteral dst);

   void jump_cc(Condition cc, AddressLiteral dst);

   // 32bit can do a case table jump in one instruction but we no longer allow the base

   // to be installed in the Address class. This jump will tranfers to the address

   // contained in the location described by entry (not the address of entry)

   void jump(ArrayAddress entry);

   // Floating

   void andpd(XMMRegister dst, Address src) { Assembler::andpd(dst, src); }

   void andpd(XMMRegister dst, AddressLiteral src);

   void andps(XMMRegister dst, XMMRegister src) { Assembler::andps(dst, src); }

   void andps(XMMRegister dst, Address src) { Assembler::andps(dst, src); }

   void andps(XMMRegister dst, AddressLiteral src);

   void comiss(XMMRegister dst, XMMRegister src) { Assembler::comiss(dst, src); }

   void comiss(XMMRegister dst, Address src) { Assembler::comiss(dst, src); }

   void comiss(XMMRegister dst, AddressLiteral src);

   void comisd(XMMRegister dst, XMMRegister src) { Assembler::comisd(dst, src); }

   void comisd(XMMRegister dst, Address src) { Assembler::comisd(dst, src); }

   void comisd(XMMRegister dst, AddressLiteral src);

   void fadd_s(Address src)        { Assembler::fadd_s(src); }

   void fadd_s(AddressLiteral src) { Assembler::fadd_s(as_Address(src)); }

   void fldcw(Address src) { Assembler::fldcw(src); }

   void fldcw(AddressLiteral src);

   void fld_s(int index)   { Assembler::fld_s(index); }

   void fld_s(Address src) { Assembler::fld_s(src); }

   void fld_s(AddressLiteral src);

   void fld_d(Address src) { Assembler::fld_d(src); }

   void fld_d(AddressLiteral src);

   void fld_x(Address src) { Assembler::fld_x(src); }

   void fld_x(AddressLiteral src);

   void fmul_s(Address src)        { Assembler::fmul_s(src); }

   void fmul_s(AddressLiteral src) { Assembler::fmul_s(as_Address(src)); }

   void ldmxcsr(Address src) { Assembler::ldmxcsr(src); }

   void ldmxcsr(AddressLiteral src);

   // compute pow(x,y) and exp(x) with x86 instructions. Don't cover

   // all corner cases and may result in NaN and require fallback to a

   // runtime call.

   void fast_pow();

   void fast_exp();

   void increase_precision();

   void restore_precision();

   // computes exp(x). Fallback to runtime call included.

   void exp_with_fallback(int num_fpu_regs_in_use) { pow_or_exp(true, num_fpu_regs_in_use); }

   // computes pow(x,y). Fallback to runtime call included.

   void pow_with_fallback(int num_fpu_regs_in_use) { pow_or_exp(false, num_fpu_regs_in_use); }

 private:

   // call runtime as a fallback for trig functions and pow/exp.

   void fp_runtime_fallback(address runtime_entry, int nb_args, int num_fpu_regs_in_use);

   // computes 2^(Ylog2X); Ylog2X in ST(0)

   void pow_exp_core_encoding();

   // computes pow(x,y) or exp(x). Fallback to runtime call included.

   void pow_or_exp(bool is_exp, int num_fpu_regs_in_use);

   // these are private because users should be doing movflt/movdbl

   void movss(Address dst, XMMRegister src)     { Assembler::movss(dst, src); }

   void movss(XMMRegister dst, XMMRegister src) { Assembler::movss(dst, src); }

   void movss(XMMRegister dst, Address src)     { Assembler::movss(dst, src); }

   void movss(XMMRegister dst, AddressLiteral src);

   void movlpd(XMMRegister dst, Address src)    {Assembler::movlpd(dst, src); }

   void movlpd(XMMRegister dst, AddressLiteral src);

 public:

   void addsd(XMMRegister dst, XMMRegister src)    { Assembler::addsd(dst, src); }

   void addsd(XMMRegister dst, Address src)        { Assembler::addsd(dst, src); }

   void addsd(XMMRegister dst, AddressLiteral src);

   void addss(XMMRegister dst, XMMRegister src)    { Assembler::addss(dst, src); }

   void addss(XMMRegister dst, Address src)        { Assembler::addss(dst, src); }

   void addss(XMMRegister dst, AddressLiteral src);

   void divsd(XMMRegister dst, XMMRegister src)    { Assembler::divsd(dst, src); }

   void divsd(XMMRegister dst, Address src)        { Assembler::divsd(dst, src); }

   void divsd(XMMRegister dst, AddressLiteral src);

   void divss(XMMRegister dst, XMMRegister src)    { Assembler::divss(dst, src); }

   void divss(XMMRegister dst, Address src)        { Assembler::divss(dst, src); }

   void divss(XMMRegister dst, AddressLiteral src);

   // Move Unaligned Double Quadword

   void movdqu(Address     dst, XMMRegister src)   { Assembler::movdqu(dst, src); }

   void movdqu(XMMRegister dst, Address src)       { Assembler::movdqu(dst, src); }

   void movdqu(XMMRegister dst, XMMRegister src)   { Assembler::movdqu(dst, src); }

   void movdqu(XMMRegister dst, AddressLiteral src);

   void movsd(XMMRegister dst, XMMRegister src) { Assembler::movsd(dst, src); }

   void movsd(Address dst, XMMRegister src)     { Assembler::movsd(dst, src); }

   void movsd(XMMRegister dst, Address src)     { Assembler::movsd(dst, src); }

   void movsd(XMMRegister dst, AddressLiteral src);

   void mulsd(XMMRegister dst, XMMRegister src)    { Assembler::mulsd(dst, src); }

   void mulsd(XMMRegister dst, Address src)        { Assembler::mulsd(dst, src); }

   void mulsd(XMMRegister dst, AddressLiteral src);

   void mulss(XMMRegister dst, XMMRegister src)    { Assembler::mulss(dst, src); }

   void mulss(XMMRegister dst, Address src)        { Assembler::mulss(dst, src); }

   void mulss(XMMRegister dst, AddressLiteral src);

   void sqrtsd(XMMRegister dst, XMMRegister src)    { Assembler::sqrtsd(dst, src); }

   void sqrtsd(XMMRegister dst, Address src)        { Assembler::sqrtsd(dst, src); }

   void sqrtsd(XMMRegister dst, AddressLiteral src);

   void sqrtss(XMMRegister dst, XMMRegister src)    { Assembler::sqrtss(dst, src); }

   void sqrtss(XMMRegister dst, Address src)        { Assembler::sqrtss(dst, src); }

   void sqrtss(XMMRegister dst, AddressLiteral src);

   void subsd(XMMRegister dst, XMMRegister src)    { Assembler::subsd(dst, src); }

   void subsd(XMMRegister dst, Address src)        { Assembler::subsd(dst, src); }

   void subsd(XMMRegister dst, AddressLiteral src);

   void subss(XMMRegister dst, XMMRegister src)    { Assembler::subss(dst, src); }

   void subss(XMMRegister dst, Address src)        { Assembler::subss(dst, src); }

   void subss(XMMRegister dst, AddressLiteral src);

   void ucomiss(XMMRegister dst, XMMRegister src) { Assembler::ucomiss(dst, src); }

   void ucomiss(XMMRegister dst, Address src)     { Assembler::ucomiss(dst, src); }

   void ucomiss(XMMRegister dst, AddressLiteral src);

   void ucomisd(XMMRegister dst, XMMRegister src) { Assembler::ucomisd(dst, src); }

   void ucomisd(XMMRegister dst, Address src)     { Assembler::ucomisd(dst, src); }

   void ucomisd(XMMRegister dst, AddressLiteral src);

   // Bitwise Logical XOR of Packed Double-Precision Floating-Point Values

   void xorpd(XMMRegister dst, XMMRegister src) { Assembler::xorpd(dst, src); }

   void xorpd(XMMRegister dst, Address src)     { Assembler::xorpd(dst, src); }

   void xorpd(XMMRegister dst, AddressLiteral src);

   // Bitwise Logical XOR of Packed Single-Precision Floating-Point Values

   void xorps(XMMRegister dst, XMMRegister src) { Assembler::xorps(dst, src); }

   void xorps(XMMRegister dst, Address src)     { Assembler::xorps(dst, src); }

   void xorps(XMMRegister dst, AddressLiteral src);

   // Shuffle Bytes

   void pshufb(XMMRegister dst, XMMRegister src) { Assembler::pshufb(dst, src); }

   void pshufb(XMMRegister dst, Address src)     { Assembler::pshufb(dst, src); }

   void pshufb(XMMRegister dst, AddressLiteral src);

   // AVX 3-operands instructions

   void vaddsd(XMMRegister dst, XMMRegister nds, XMMRegister src) { Assembler::vaddsd(dst, nds, src); }

   void vaddsd(XMMRegister dst, XMMRegister nds, Address src)     { Assembler::vaddsd(dst, nds, src); }

   void vaddsd(XMMRegister dst, XMMRegister nds, AddressLiteral src);

   void vaddss(XMMRegister dst, XMMRegister nds, XMMRegister src) { Assembler::vaddss(dst, nds, src); }

   void vaddss(XMMRegister dst, XMMRegister nds, Address src)     { Assembler::vaddss(dst, nds, src); }

   void vaddss(XMMRegister dst, XMMRegister nds, AddressLiteral src);

   void vandpd(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256) { Assembler::vandpd(dst, nds, src, vector256); }

   void vandpd(XMMRegister dst, XMMRegister nds, Address src, bool vector256)     { Assembler::vandpd(dst, nds, src, vector256); }

   void vandpd(XMMRegister dst, XMMRegister nds, AddressLiteral src, bool vector256);

   void vandps(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256) { Assembler::vandps(dst, nds, src, vector256); }

   void vandps(XMMRegister dst, XMMRegister nds, Address src, bool vector256)     { Assembler::vandps(dst, nds, src, vector256); }

   void vandps(XMMRegister dst, XMMRegister nds, AddressLiteral src, bool vector256);

   void vdivsd(XMMRegister dst, XMMRegister nds, XMMRegister src) { Assembler::vdivsd(dst, nds, src); }

   void vdivsd(XMMRegister dst, XMMRegister nds, Address src)     { Assembler::vdivsd(dst, nds, src); }

   void vdivsd(XMMRegister dst, XMMRegister nds, AddressLiteral src);

   void vdivss(XMMRegister dst, XMMRegister nds, XMMRegister src) { Assembler::vdivss(dst, nds, src); }

   void vdivss(XMMRegister dst, XMMRegister nds, Address src)     { Assembler::vdivss(dst, nds, src); }

   void vdivss(XMMRegister dst, XMMRegister nds, AddressLiteral src);

   void vmulsd(XMMRegister dst, XMMRegister nds, XMMRegister src) { Assembler::vmulsd(dst, nds, src); }

   void vmulsd(XMMRegister dst, XMMRegister nds, Address src)     { Assembler::vmulsd(dst, nds, src); }

   void vmulsd(XMMRegister dst, XMMRegister nds, AddressLiteral src);

   void vmulss(XMMRegister dst, XMMRegister nds, XMMRegister src) { Assembler::vmulss(dst, nds, src); }

   void vmulss(XMMRegister dst, XMMRegister nds, Address src)     { Assembler::vmulss(dst, nds, src); }

   void vmulss(XMMRegister dst, XMMRegister nds, AddressLiteral src);

   void vsubsd(XMMRegister dst, XMMRegister nds, XMMRegister src) { Assembler::vsubsd(dst, nds, src); }

   void vsubsd(XMMRegister dst, XMMRegister nds, Address src)     { Assembler::vsubsd(dst, nds, src); }

   void vsubsd(XMMRegister dst, XMMRegister nds, AddressLiteral src);

   void vsubss(XMMRegister dst, XMMRegister nds, XMMRegister src) { Assembler::vsubss(dst, nds, src); }

   void vsubss(XMMRegister dst, XMMRegister nds, Address src)     { Assembler::vsubss(dst, nds, src); }

   void vsubss(XMMRegister dst, XMMRegister nds, AddressLiteral src);

   // AVX Vector instructions

   void vxorpd(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256) { Assembler::vxorpd(dst, nds, src, vector256); }

   void vxorpd(XMMRegister dst, XMMRegister nds, Address src, bool vector256) { Assembler::vxorpd(dst, nds, src, vector256); }

   void vxorpd(XMMRegister dst, XMMRegister nds, AddressLiteral src, bool vector256);

   void vxorps(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256) { Assembler::vxorps(dst, nds, src, vector256); }

   void vxorps(XMMRegister dst, XMMRegister nds, Address src, bool vector256) { Assembler::vxorps(dst, nds, src, vector256); }

   void vxorps(XMMRegister dst, XMMRegister nds, AddressLiteral src, bool vector256);

   void vpxor(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256) {

     if (UseAVX > 1 || !vector256) // vpxor 256 bit is available only in AVX2

       Assembler::vpxor(dst, nds, src, vector256);

     else

       Assembler::vxorpd(dst, nds, src, vector256);

   }

   void vpxor(XMMRegister dst, XMMRegister nds, Address src, bool vector256) {

     if (UseAVX > 1 || !vector256) // vpxor 256 bit is available only in AVX2

       Assembler::vpxor(dst, nds, src, vector256);

     else

       Assembler::vxorpd(dst, nds, src, vector256);

   }

   // Simple version for AVX2 256bit vectors

   void vpxor(XMMRegister dst, XMMRegister src) { Assembler::vpxor(dst, dst, src, true); }

   void vpxor(XMMRegister dst, Address src) { Assembler::vpxor(dst, dst, src, true); }

   // Move packed integer values from low 128 bit to hign 128 bit in 256 bit vector.

   void vinserti128h(XMMRegister dst, XMMRegister nds, XMMRegister src) {

     if (UseAVX > 1) // vinserti128h is available only in AVX2

       Assembler::vinserti128h(dst, nds, src);

     else

       Assembler::vinsertf128h(dst, nds, src);

   }

   // Data

   void cmov32( Condition cc, Register dst, Address  src);

   void cmov32( Condition cc, Register dst, Register src);

   void cmov(   Condition cc, Register dst, Register src) { cmovptr(cc, dst, src); }

   void cmovptr(Condition cc, Register dst, Address  src) { LP64_ONLY(cmovq(cc, dst, src)) NOT_LP64(cmov32(cc, dst, src)); }

   void cmovptr(Condition cc, Register dst, Register src) { LP64_ONLY(cmovq(cc, dst, src)) NOT_LP64(cmov32(cc, dst, src)); }

   void movoop(Register dst, jobject obj);

   void movoop(Address dst, jobject obj);

   void mov_metadata(Register dst, Metadata* obj);

   void mov_metadata(Address dst, Metadata* obj);

   void movptr(ArrayAddress dst, Register src);

   // can this do an lea?

   void movptr(Register dst, ArrayAddress src);

   void movptr(Register dst, Address src);

   void movptr(Register dst, AddressLiteral src);

   void movptr(Register dst, intptr_t src);

   void movptr(Register dst, Register src);

   void movptr(Address dst, intptr_t src);

   void movptr(Address dst, Register src);

   void movptr(Register dst, RegisterOrConstant src) {

     if (src.is_constant()) movptr(dst, src.as_constant());

     else                   movptr(dst, src.as_register());

   }

 #ifdef _LP64

   // Generally the next two are only used for moving NULL

   // Although there are situations in initializing the mark word where

   // they could be used. They are dangerous.

   // They only exist on LP64 so that int32_t and intptr_t are not the same

   // and we have ambiguous declarations.

   void movptr(Address dst, int32_t imm32);

   void movptr(Register dst, int32_t imm32);

 #endif // _LP64

   // to avoid hiding movl

   void mov32(AddressLiteral dst, Register src);

   void mov32(Register dst, AddressLiteral src);

   // to avoid hiding movb

   void movbyte(ArrayAddress dst, int src);

   // Import other mov() methods from the parent class or else

   // they will be hidden by the following overriding declaration.

   using Assembler::movdl;

   using Assembler::movq;

   void movdl(XMMRegister dst, AddressLiteral src);

   void movq(XMMRegister dst, AddressLiteral src);

   // Can push value or effective address

   void pushptr(AddressLiteral src);

   void pushptr(Address src) { LP64_ONLY(pushq(src)) NOT_LP64(pushl(src)); }

   void popptr(Address src) { LP64_ONLY(popq(src)) NOT_LP64(popl(src)); }

   void pushoop(jobject obj);

   void pushklass(Metadata* obj);

   // sign extend as need a l to ptr sized element

   void movl2ptr(Register dst, Address src) { LP64_ONLY(movslq(dst, src)) NOT_LP64(movl(dst, src)); }

   void movl2ptr(Register dst, Register src) { LP64_ONLY(movslq(dst, src)) NOT_LP64(if (dst != src) movl(dst, src)); }

   // C2 compiled method's prolog code.

   void verified_entry(int framesize, bool stack_bang, bool fp_mode_24b);

   // clear memory of size 'cnt' qwords, starting at 'base'.

   void clear_mem(Register base, Register cnt, Register rtmp);

   // IndexOf strings.

   // Small strings are loaded through stack if they cross page boundary.

   void string_indexof(Register str1, Register str2,

                       Register cnt1, Register cnt2,

                       int int_cnt2,  Register result,

                       XMMRegister vec, Register tmp);

   // IndexOf for constant substrings with size >= 8 elements

   // which don't need to be loaded through stack.

   void string_indexofC8(Register str1, Register str2,

                       Register cnt1, Register cnt2,

                       int int_cnt2,  Register result,

                       XMMRegister vec, Register tmp);

     // Smallest code: we don't need to load through stack,

     // check string tail.

   // Compare strings.

   void string_compare(Register str1, Register str2,

                       Register cnt1, Register cnt2, Register result,

                       XMMRegister vec1);

   // Compare char[] arrays.

   void char_arrays_equals(bool is_array_equ, Register ary1, Register ary2,

                           Register limit, Register result, Register chr,

                           XMMRegister vec1, XMMRegister vec2);

   // Fill primitive arrays

   void generate_fill(BasicType t, bool aligned,

                      Register to, Register value, Register count,

                      Register rtmp, XMMRegister xtmp);

 #undef VIRTUAL

 };

 /**

  * class SkipIfEqual:

  *

  * 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 SkipIfEqual {

  private:

   MacroAssembler* _masm;

   Label _label;

  public:

    SkipIfEqual(MacroAssembler*, const bool* flag_addr, bool value);

    ~SkipIfEqual();

 };

 #endif // CPU_X86_VM_MACROASSEMBLER_X86_HPP