jdk8-mips64-public/hotspot: src/cpu/x86/vm/macroAssembler

src/cpu/x86/vm/macroAssembler_x86.hpp@44ef77ad417c (annotated)

src/cpu/x86/vm/macroAssembler_x86.hpp

Wed, 17 Jun 2015 17:48:25 -0700

author: ascarpino
date: Wed, 17 Jun 2015 17:48:25 -0700
changeset 9788: 44ef77ad417c
parent 9669: 32bc598624bd
child 9703: 2fdf635bcf28
permissions: -rw-r--r--

8073108: Use x86 and SPARC CPU instructions for GHASH acceleration
Reviewed-by: kvn, jrose, phh

 /*
  * Copyright (c) 1997, 2017, 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
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef CPU_X86_VM_MACROASSEMBLER_X86_HPP
 #define CPU_X86_VM_MACROASSEMBLER_X86_HPP
 #include "asm/assembler.hpp"
 #include "utilities/macros.hpp"
 #include "runtime/rtmLocking.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 */ ||
         op == 0xC7 && branch[1] == 0xF8 /* xbegin */,
         "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 || op == 0xC7)? 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);
   void incrementq(AddressLiteral 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);
   // thread in the default location (r15_thread on 64bit)
   void reset_last_Java_frame(bool clear_fp);
   // 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)
   void resolve_jobject(Register value, Register thread, Register tmp);
   void clear_jweak_tag(Register possibly_jweak);
 #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);
   // Returns the byte size of the instructions generated by decode_klass_not_null()
   // when compressed klass pointers are being used.
   static int instr_size_for_decode_klass_not_null();
   // 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,
                                bool return_method = true);
   // 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");
   // Verify or restore cpu control state after JNI call
   void restore_cpu_control_state_after_jni();
   // 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);
 #ifdef COMPILER2
   // Code used by cmpFastLock and cmpFastUnlock mach instructions in .ad file.
   // See full desription in macroAssembler_x86.cpp.
   void fast_lock(Register obj, Register box, Register tmp,
                  Register scr, Register cx1, Register cx2,
                  BiasedLockingCounters* counters,
                  RTMLockingCounters* rtm_counters,
                  RTMLockingCounters* stack_rtm_counters,
                  Metadata* method_data,
                  bool use_rtm, bool profile_rtm);
   void fast_unlock(Register obj, Register box, Register tmp, bool use_rtm);
 #if INCLUDE_RTM_OPT
   void rtm_counters_update(Register abort_status, Register rtm_counters);
   void branch_on_random_using_rdtsc(Register tmp, Register scr, int count, Label& brLabel);
   void rtm_abort_ratio_calculation(Register tmp, Register rtm_counters_reg,
                                    RTMLockingCounters* rtm_counters,
                                    Metadata* method_data);
   void rtm_profiling(Register abort_status_Reg, Register rtm_counters_Reg,
                      RTMLockingCounters* rtm_counters, Metadata* method_data, bool profile_rtm);
   void rtm_retry_lock_on_abort(Register retry_count, Register abort_status, Label& retryLabel);
   void rtm_retry_lock_on_busy(Register retry_count, Register box, Register tmp, Register scr, Label& retryLabel);
   void rtm_stack_locking(Register obj, Register tmp, Register scr,
                          Register retry_on_abort_count,
                          RTMLockingCounters* stack_rtm_counters,
                          Metadata* method_data, bool profile_rtm,
                          Label& DONE_LABEL, Label& IsInflated);
   void rtm_inflated_locking(Register obj, Register box, Register tmp,
                             Register scr, Register retry_on_busy_count,
                             Register retry_on_abort_count,
                             RTMLockingCounters* rtm_counters,
                             Metadata* method_data, bool profile_rtm,
                             Label& DONE_LABEL);
 #endif
 #endif
   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 imulptr(Register dst, Register src, int imm32) { LP64_ONLY(imulq(dst, src, imm32)) NOT_LP64(imull(dst, src, imm32)); }
   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(Address counter_addr);
   void atomic_incl(AddressLiteral counter_addr, Register scr = rscratch1);
 #ifdef _LP64
   void atomic_incq(Address counter_addr);
   void atomic_incq(AddressLiteral counter_addr, Register scr = rscratch1);
 #endif
   void atomic_incptr(AddressLiteral counter_addr, Register scr = rscratch1) { LP64_ONLY(atomic_incq(counter_addr, scr)) NOT_LP64(atomic_incl(counter_addr, scr)) ; }
   void atomic_incptr(Address counter_addr) { LP64_ONLY(atomic_incq(counter_addr)) NOT_LP64(atomic_incl(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 orptr(Address dst, int32_t imm32) { LP64_ONLY(orq(dst, imm32)) NOT_LP64(orl(dst, imm32)); }
   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);
   // Move Aligned Double Quadword
   void movdqa(XMMRegister dst, Address src)       { Assembler::movdqa(dst, src); }
   void movdqa(XMMRegister dst, XMMRegister src)   { Assembler::movdqa(dst, src); }
   void movdqa(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);
   // Carry-Less Multiplication Quadword
   void pclmulldq(XMMRegister dst, XMMRegister src) {
     // 0x00 - multiply lower 64 bits [0:63]
     Assembler::pclmulqdq(dst, src, 0x00);
   }
   void pclmulhdq(XMMRegister dst, XMMRegister src) {
     // 0x11 - multiply upper 64 bits [64:127]
     Assembler::pclmulqdq(dst, src, 0x11);
   }
   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);
   }
   // Carry-Less Multiplication Quadword
   void vpclmulldq(XMMRegister dst, XMMRegister nds, XMMRegister src) {
     // 0x00 - multiply lower 64 bits [0:63]
     Assembler::vpclmulqdq(dst, nds, src, 0x00);
   }
   void vpclmulhdq(XMMRegister dst, XMMRegister nds, XMMRegister src) {
     // 0x11 - multiply upper 64 bits [64:127]
     Assembler::vpclmulqdq(dst, nds, src, 0x11);
   }
   // 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);
 #ifdef _LP64
   void movptr(Register dst, AddressLiteral src, Register scratch=rscratch1);
 #else
   void movptr(Register dst, AddressLiteral src, Register scratch=noreg); // Scratch reg is ignored in 32-bit
 #endif
   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, int stack_bang_size, 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);
   void encode_iso_array(Register src, Register dst, Register len,
                         XMMRegister tmp1, XMMRegister tmp2, XMMRegister tmp3,
                         XMMRegister tmp4, Register tmp5, Register result);
 #ifdef _LP64
   void add2_with_carry(Register dest_hi, Register dest_lo, Register src1, Register src2);
   void multiply_64_x_64_loop(Register x, Register xstart, Register x_xstart,
                              Register y, Register y_idx, Register z,
                              Register carry, Register product,
                              Register idx, Register kdx);
   void multiply_add_128_x_128(Register x_xstart, Register y, Register z,
                               Register yz_idx, Register idx,
                               Register carry, Register product, int offset);
   void multiply_128_x_128_bmi2_loop(Register y, Register z,
                                     Register carry, Register carry2,
                                     Register idx, Register jdx,
                                     Register yz_idx1, Register yz_idx2,
                                     Register tmp, Register tmp3, Register tmp4);
   void multiply_128_x_128_loop(Register x_xstart, Register y, Register z,
                                Register yz_idx, Register idx, Register jdx,
                                Register carry, Register product,
                                Register carry2);
   void multiply_to_len(Register x, Register xlen, Register y, Register ylen, Register z, Register zlen,
                        Register tmp1, Register tmp2, Register tmp3, Register tmp4, Register tmp5);
   void square_rshift(Register x, Register len, Register z, Register tmp1, Register tmp3,
                      Register tmp4, Register tmp5, Register rdxReg, Register raxReg);
   void multiply_add_64_bmi2(Register sum, Register op1, Register op2, Register carry,
                             Register tmp2);
   void multiply_add_64(Register sum, Register op1, Register op2, Register carry,
                        Register rdxReg, Register raxReg);
   void add_one_64(Register z, Register zlen, Register carry, Register tmp1);
   void lshift_by_1(Register x, Register len, Register z, Register zlen, Register tmp1, Register tmp2,
                        Register tmp3, Register tmp4);
   void square_to_len(Register x, Register len, Register z, Register zlen, Register tmp1, Register tmp2,
                      Register tmp3, Register tmp4, Register tmp5, Register rdxReg, Register raxReg);
   void mul_add_128_x_32_loop(Register out, Register in, Register offset, Register len, Register tmp1,
                Register tmp2, Register tmp3, Register tmp4, Register tmp5, Register rdxReg,
                Register raxReg);
   void mul_add(Register out, Register in, Register offset, Register len, Register k, Register tmp1,
                Register tmp2, Register tmp3, Register tmp4, Register tmp5, Register rdxReg,
                Register raxReg);
 #endif
   // CRC32 code for java.util.zip.CRC32::updateBytes() instrinsic.
   void update_byte_crc32(Register crc, Register val, Register table);
   void kernel_crc32(Register crc, Register buf, Register len, Register table, Register tmp);
   // Fold 128-bit data chunk
   void fold_128bit_crc32(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, Register buf, int offset);
   void fold_128bit_crc32(XMMRegister xcrc, XMMRegister xK, XMMRegister xtmp, XMMRegister xbuf);
   // Fold 8-bit data
   void fold_8bit_crc32(Register crc, Register table, Register tmp);
   void fold_8bit_crc32(XMMRegister crc, Register table, XMMRegister xtmp, Register tmp);
 #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

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/x86/vm/macroAssembler_x86.hpp@44ef77ad417c (annotated)

src/cpu/x86/vm/macroAssembler_x86.hpp