jdk8-mips64-public/hotspot: src/cpu/x86/vm/assembler_x86

src/cpu/x86/vm/assembler_x86_64.hpp@1ee8caae33af (annotated)

src/cpu/x86/vm/assembler_x86_64.hpp

Thu, 21 Aug 2008 23:36:31 -0400

author: tonyp
date: Thu, 21 Aug 2008 23:36:31 -0400
changeset 791: 1ee8caae33af
parent 779: 6aae2f9d0294
parent 631: d1605aabd0a1
permissions: -rw-r--r--

Merge

 /*
  * Copyright 2003-2008 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  *
  */
 class BiasedLockingCounters;
 // Contains all the definitions needed for amd64 assembly code generation.
 #ifdef _LP64
 // Calling convention
 class Argument VALUE_OBJ_CLASS_SPEC {
  public:
   enum {
 #ifdef _WIN64
     n_int_register_parameters_c   = 4, // rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
     n_float_register_parameters_c = 4,  // xmm0 - xmm3 (c_farg0, c_farg1, ... )
 #else
     n_int_register_parameters_c   = 6, // rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
     n_float_register_parameters_c = 8,  // xmm0 - xmm7 (c_farg0, c_farg1, ... )
 #endif  // _WIN64
     n_int_register_parameters_j   = 6, // j_rarg0, j_rarg1, ...
     n_float_register_parameters_j = 8  // j_farg0, j_farg1, ...
   };
 };
 // Symbolically name the register arguments used by the c calling convention.
 // Windows is different from linux/solaris. So much for standards...
 #ifdef _WIN64
 REGISTER_DECLARATION(Register, c_rarg0, rcx);
 REGISTER_DECLARATION(Register, c_rarg1, rdx);
 REGISTER_DECLARATION(Register, c_rarg2, r8);
 REGISTER_DECLARATION(Register, c_rarg3, r9);
 REGISTER_DECLARATION(XMMRegister, c_farg0, xmm0);
 REGISTER_DECLARATION(XMMRegister, c_farg1, xmm1);
 REGISTER_DECLARATION(XMMRegister, c_farg2, xmm2);
 REGISTER_DECLARATION(XMMRegister, c_farg3, xmm3);
 #else
 REGISTER_DECLARATION(Register, c_rarg0, rdi);
 REGISTER_DECLARATION(Register, c_rarg1, rsi);
 REGISTER_DECLARATION(Register, c_rarg2, rdx);
 REGISTER_DECLARATION(Register, c_rarg3, rcx);
 REGISTER_DECLARATION(Register, c_rarg4, r8);
 REGISTER_DECLARATION(Register, c_rarg5, r9);
 REGISTER_DECLARATION(XMMRegister, c_farg0, xmm0);
 REGISTER_DECLARATION(XMMRegister, c_farg1, xmm1);
 REGISTER_DECLARATION(XMMRegister, c_farg2, xmm2);
 REGISTER_DECLARATION(XMMRegister, c_farg3, xmm3);
 REGISTER_DECLARATION(XMMRegister, c_farg4, xmm4);
 REGISTER_DECLARATION(XMMRegister, c_farg5, xmm5);
 REGISTER_DECLARATION(XMMRegister, c_farg6, xmm6);
 REGISTER_DECLARATION(XMMRegister, c_farg7, xmm7);
 #endif  // _WIN64
 // Symbolically name the register arguments used by the Java calling convention.
 // We have control over the convention for java so we can do what we please.
 // What pleases us is to offset the java calling convention so that when
 // we call a suitable jni method the arguments are lined up and we don't
 // have to do little shuffling. A suitable jni method is non-static and a
 // small number of arguments (two fewer args on windows)
 //
 //        |-------------------------------------------------------|
 //        | c_rarg0   c_rarg1  c_rarg2 c_rarg3 c_rarg4 c_rarg5    |
 //        |-------------------------------------------------------|
 //        | rcx       rdx      r8      r9      rdi*    rsi*       | windows (* not a c_rarg)
 //        | rdi       rsi      rdx     rcx     r8      r9         | solaris/linux
 //        |-------------------------------------------------------|
 //        | j_rarg5   j_rarg0  j_rarg1 j_rarg2 j_rarg3 j_rarg4    |
 //        |-------------------------------------------------------|
 REGISTER_DECLARATION(Register, j_rarg0, c_rarg1);
 REGISTER_DECLARATION(Register, j_rarg1, c_rarg2);
 REGISTER_DECLARATION(Register, j_rarg2, c_rarg3);
 // Windows runs out of register args here
 #ifdef _WIN64
 REGISTER_DECLARATION(Register, j_rarg3, rdi);
 REGISTER_DECLARATION(Register, j_rarg4, rsi);
 #else
 REGISTER_DECLARATION(Register, j_rarg3, c_rarg4);
 REGISTER_DECLARATION(Register, j_rarg4, c_rarg5);
 #endif // _WIN64
 REGISTER_DECLARATION(Register, j_rarg5, c_rarg0);
 REGISTER_DECLARATION(XMMRegister, j_farg0, xmm0);
 REGISTER_DECLARATION(XMMRegister, j_farg1, xmm1);
 REGISTER_DECLARATION(XMMRegister, j_farg2, xmm2);
 REGISTER_DECLARATION(XMMRegister, j_farg3, xmm3);
 REGISTER_DECLARATION(XMMRegister, j_farg4, xmm4);
 REGISTER_DECLARATION(XMMRegister, j_farg5, xmm5);
 REGISTER_DECLARATION(XMMRegister, j_farg6, xmm6);
 REGISTER_DECLARATION(XMMRegister, j_farg7, xmm7);
 REGISTER_DECLARATION(Register, rscratch1, r10);  // volatile
 REGISTER_DECLARATION(Register, rscratch2, r11);  // volatile
 REGISTER_DECLARATION(Register, r12_heapbase, r12); // callee-saved
 REGISTER_DECLARATION(Register, r15_thread, r15);   // callee-saved
 #endif // _LP64
 // Address is an abstraction used to represent a memory location
 // using any of the amd64 addressing modes with one object.
 //
 // Note: A register location is represented via a Register, not
 //       via an address for efficiency & simplicity reasons.
 class ArrayAddress;
 class Address VALUE_OBJ_CLASS_SPEC {
  public:
   enum ScaleFactor {
     no_scale = -1,
     times_1  =  0,
     times_2  =  1,
     times_4  =  2,
     times_8  =  3
   };
  private:
   Register         _base;
   Register         _index;
   ScaleFactor      _scale;
   int              _disp;
   RelocationHolder _rspec;
   // Easily misused constructors make them private
   Address(int disp, address loc, relocInfo::relocType rtype);
   Address(int disp, address loc, RelocationHolder spec);
  public:
   // creation
   Address()
     : _base(noreg),
       _index(noreg),
       _scale(no_scale),
       _disp(0) {
   }
   // No default displacement otherwise Register can be implicitly
   // converted to 0(Register) which is quite a different animal.
   Address(Register base, int disp)
     : _base(base),
       _index(noreg),
       _scale(no_scale),
       _disp(disp) {
   }
   Address(Register base, Register index, ScaleFactor scale, int disp = 0)
     : _base (base),
       _index(index),
       _scale(scale),
       _disp (disp) {
     assert(!index->is_valid() == (scale == Address::no_scale),
            "inconsistent address");
   }
   // The following two overloads are used in connection with the
   // ByteSize type (see sizes.hpp).  They simplify the use of
   // ByteSize'd arguments in assembly code. Note that their equivalent
   // for the optimized build are the member functions with int disp
   // argument since ByteSize is mapped to an int type in that case.
   //
   // Note: DO NOT introduce similar overloaded functions for WordSize
   // arguments as in the optimized mode, both ByteSize and WordSize
   // are mapped to the same type and thus the compiler cannot make a
   // distinction anymore (=> compiler errors).
 #ifdef ASSERT
   Address(Register base, ByteSize disp)
     : _base(base),
       _index(noreg),
       _scale(no_scale),
       _disp(in_bytes(disp)) {
   }
   Address(Register base, Register index, ScaleFactor scale, ByteSize disp)
     : _base(base),
       _index(index),
       _scale(scale),
       _disp(in_bytes(disp)) {
     assert(!index->is_valid() == (scale == Address::no_scale),
            "inconsistent address");
   }
 #endif // ASSERT
   // accessors
   bool uses(Register reg) const {
     return _base == reg || _index == reg;
   }
   // Convert the raw encoding form into the form expected by the constructor for
   // Address.  An index of 4 (rsp) corresponds to having no index, so convert
   // that to noreg for the Address constructor.
   static Address make_raw(int base, int index, int scale, int disp);
   static Address make_array(ArrayAddress);
   Register base() const {
     return _base;
   }
   Register index() const {
     return _index;
   }
   int disp() const {
     return _disp;
   }
  private:
   bool base_needs_rex() const {
     return _base != noreg && _base->encoding() >= 8;
   }
   bool index_needs_rex() const {
     return _index != noreg &&_index->encoding() >= 8;
   }
   relocInfo::relocType reloc() const { return _rspec.type(); }
   friend class Assembler;
   friend class MacroAssembler;
   friend class LIR_Assembler; // base/index/scale/disp
 };
 //
 // AddressLiteral has been split out from Address because operands of this type
 // need to be treated specially on 32bit vs. 64bit platforms. By splitting it out
 // the few instructions that need to deal with address literals are unique and the
 // MacroAssembler does not have to implement every instruction in the Assembler
 // in order to search for address literals that may need special handling depending
 // on the instruction and the platform. As small step on the way to merging i486/amd64
 // directories.
 //
 class AddressLiteral VALUE_OBJ_CLASS_SPEC {
   friend class ArrayAddress;
   RelocationHolder _rspec;
   // Typically we use AddressLiterals we want to use their rval
   // However in some situations we want the lval (effect address) of the item.
   // We provide a special factory for making those lvals.
   bool _is_lval;
   // If the target is far we'll need to load the ea of this to
   // a register to reach it. Otherwise if near we can do rip
   // relative addressing.
   address          _target;
  protected:
   // creation
   AddressLiteral()
     : _is_lval(false),
       _target(NULL)
   {}
   public:
   AddressLiteral(address target, relocInfo::relocType rtype);
   AddressLiteral(address target, RelocationHolder const& rspec)
     : _rspec(rspec),
       _is_lval(false),
       _target(target)
   {}
   AddressLiteral addr() {
     AddressLiteral ret = *this;
     ret._is_lval = true;
     return ret;
   }
  private:
   address target() { return _target; }
   bool is_lval() { return _is_lval; }
   relocInfo::relocType reloc() const { return _rspec.type(); }
   const RelocationHolder& rspec() const { return _rspec; }
   friend class Assembler;
   friend class MacroAssembler;
   friend class Address;
   friend class LIR_Assembler;
 };
 // Convience classes
 class RuntimeAddress: public AddressLiteral {
   public:
   RuntimeAddress(address target) : AddressLiteral(target, relocInfo::runtime_call_type) {}
 };
 class OopAddress: public AddressLiteral {
   public:
   OopAddress(address target) : AddressLiteral(target, relocInfo::oop_type){}
 };
 class ExternalAddress: public AddressLiteral {
   public:
   ExternalAddress(address target) : AddressLiteral(target, relocInfo::external_word_type){}
 };
 class InternalAddress: public AddressLiteral {
   public:
   InternalAddress(address target) : AddressLiteral(target, relocInfo::internal_word_type) {}
 };
 // x86 can do array addressing as a single operation since disp can be an absolute
 // address but amd64 can't [e.g. array_base(rx, ry:width) ]. We create a class
 // that expresses the concept but does extra magic on amd64 to get the final result
 class ArrayAddress VALUE_OBJ_CLASS_SPEC {
   private:
   AddressLiteral _base;
   Address        _index;
   public:
   ArrayAddress() {};
   ArrayAddress(AddressLiteral base, Address index): _base(base), _index(index) {};
   AddressLiteral base() { return _base; }
   Address index() { return _index; }
 };
 // The amd64 Assembler: Pure assembler doing NO optimizations on
 // the instruction level (e.g. mov rax, 0 is not translated into xor
 // rax, rax!); i.e., what you write is what you get. The Assembler is
 // generating code into a CodeBuffer.
 const int FPUStateSizeInWords = 512 / wordSize;
 class Assembler : public AbstractAssembler  {
   friend class AbstractAssembler; // for the non-virtual hack
   friend class StubGenerator;
  protected:
 #ifdef ASSERT
   void check_relocation(RelocationHolder const& rspec, int format);
 #endif
   inline void emit_long64(jlong x);
   void emit_data(jint data, relocInfo::relocType rtype, int format /* = 1 */);
   void emit_data(jint data, RelocationHolder const& rspec, int format /* = 1 */);
   void emit_data64(jlong data, relocInfo::relocType rtype, int format = 0);
   void emit_data64(jlong data, RelocationHolder const& rspec, int format = 0);
   // Helper functions for groups of instructions
   void emit_arith_b(int op1, int op2, Register dst, int imm8);
   void emit_arith(int op1, int op2, Register dst, int imm32);
   // only x86??
   void emit_arith(int op1, int op2, Register dst, jobject obj);
   void emit_arith(int op1, int op2, Register dst, Register src);
   void emit_operand(Register reg,
                     Register base, Register index, Address::ScaleFactor scale,
                     int disp,
                     RelocationHolder const& rspec,
                     int rip_relative_correction = 0);
   void emit_operand(Register reg, Address adr,
                     int rip_relative_correction = 0);
   void emit_operand(XMMRegister reg,
                     Register base, Register index, Address::ScaleFactor scale,
                     int disp,
                     RelocationHolder const& rspec,
                     int rip_relative_correction = 0);
   void emit_operand(XMMRegister reg, Address adr,
                     int rip_relative_correction = 0);
   // Immediate-to-memory forms
   void emit_arith_operand(int op1, Register rm, Address adr, int imm32);
   void emit_farith(int b1, int b2, int i);
   bool reachable(AddressLiteral adr);
   // These are all easily abused and hence protected
   // Make these disappear in 64bit mode since they would never be correct
 #ifndef _LP64
   void cmp_literal32(Register src1, int32_t imm32, RelocationHolder const& rspec);
   void cmp_literal32(Address src1, int32_t imm32, RelocationHolder const& rspec);
   void mov_literal32(Register dst, int32_t imm32, RelocationHolder const& rspec);
   void mov_literal32(Address dst, int32_t imm32, RelocationHolder const& rspec);
   void push_literal32(int32_t imm32, RelocationHolder const& rspec);
 #endif // _LP64
   void mov_literal64(Register dst, intptr_t imm64, RelocationHolder const& rspec);
   // These are unique in that we are ensured by the caller that the 32bit
   // relative in these instructions will always be able to reach the potentially
   // 64bit address described by entry. Since they can take a 64bit address they
   // don't have the 32 suffix like the other instructions in this class.
   void jmp_literal(address entry, RelocationHolder const& rspec);
   void call_literal(address entry, RelocationHolder const& rspec);
  public:
   enum Condition { // The amd64 condition codes used for conditional jumps/moves.
     zero          = 0x4,
     notZero       = 0x5,
     equal         = 0x4,
     notEqual      = 0x5,
     less          = 0xc,
     lessEqual     = 0xe,
     greater       = 0xf,
     greaterEqual  = 0xd,
     below         = 0x2,
     belowEqual    = 0x6,
     above         = 0x7,
     aboveEqual    = 0x3,
     overflow      = 0x0,
     noOverflow    = 0x1,
     carrySet      = 0x2,
     carryClear    = 0x3,
     negative      = 0x8,
     positive      = 0x9,
     parity        = 0xa,
     noParity      = 0xb
   };
   enum Prefix {
     // segment overrides
     // XXX remove segment prefixes
     CS_segment = 0x2e,
     SS_segment = 0x36,
     DS_segment = 0x3e,
     ES_segment = 0x26,
     FS_segment = 0x64,
     GS_segment = 0x65,
     REX        = 0x40,
     REX_B      = 0x41,
     REX_X      = 0x42,
     REX_XB     = 0x43,
     REX_R      = 0x44,
     REX_RB     = 0x45,
     REX_RX     = 0x46,
     REX_RXB    = 0x47,
     REX_W      = 0x48,
     REX_WB     = 0x49,
     REX_WX     = 0x4A,
     REX_WXB    = 0x4B,
     REX_WR     = 0x4C,
     REX_WRB    = 0x4D,
     REX_WRX    = 0x4E,
     REX_WRXB   = 0x4F
   };
   enum WhichOperand {
     // input to locate_operand, and format code for relocations
     imm64_operand  = 0,          // embedded 64-bit immediate operand
     disp32_operand = 1,          // embedded 32-bit displacement
     call32_operand = 2,          // embedded 32-bit self-relative displacement
 #ifndef AMD64
     _WhichOperand_limit = 3
 #else
      narrow_oop_operand = 3,     // embedded 32-bit immediate narrow oop
     _WhichOperand_limit = 4
 #endif
   };
   public:
   // Creation
   Assembler(CodeBuffer* code)
     : AbstractAssembler(code) {
   }
   // Decoding
   static address locate_operand(address inst, WhichOperand which);
   static address locate_next_instruction(address inst);
   // Utilities
  static bool is_simm(int64_t x, int nbits) { return -( CONST64(1) << (nbits-1) )  <= x   &&   x  <  ( CONST64(1) << (nbits-1) ); }
  static bool is_simm32 (int64_t x) { return x == (int64_t)(int32_t)x; }
   // Stack
   void pushaq();
   void popaq();
   void pushfq();
   void popfq();
   void pushq(int imm32);
   void pushq(Register src);
   void pushq(Address src);
   void popq(Register dst);
   void popq(Address dst);
   // Instruction prefixes
   void prefix(Prefix p);
   int prefix_and_encode(int reg_enc, bool byteinst = false);
   int prefixq_and_encode(int reg_enc);
   int prefix_and_encode(int dst_enc, int src_enc, bool byteinst = false);
   int prefixq_and_encode(int dst_enc, int src_enc);
   void prefix(Register reg);
   void prefix(Address adr);
   void prefixq(Address adr);
   void prefix(Address adr, Register reg,  bool byteinst = false);
   void prefixq(Address adr, Register reg);
   void prefix(Address adr, XMMRegister reg);
   // Moves
   void movb(Register dst, Address src);
   void movb(Address dst, int imm8);
   void movb(Address dst, Register src);
   void movw(Address dst, int imm16);
   void movw(Register dst, Address src);
   void movw(Address dst, Register src);
   void movl(Register dst, int imm32);
   void movl(Register dst, Register src);
   void movl(Register dst, Address src);
   void movl(Address dst, int imm32);
   void movl(Address dst, Register src);
   void movq(Register dst, Register src);
   void movq(Register dst, Address src);
   void movq(Address dst, Register src);
   // These prevent using movq from converting a zero (like NULL) into Register
   // by giving the compiler two choices it can't resolve
   void movq(Address dst, void* dummy);
   void movq(Register dst, void* dummy);
   void mov64(Register dst, intptr_t imm64);
   void mov64(Address dst, intptr_t imm64);
   void movsbl(Register dst, Address src);
   void movsbl(Register dst, Register src);
   void movswl(Register dst, Address src);
   void movswl(Register dst, Register src);
   void movslq(Register dst, Address src);
   void movslq(Register dst, Register src);
   void movzbl(Register dst, Address src);
   void movzbl(Register dst, Register src);
   void movzwl(Register dst, Address src);
   void movzwl(Register dst, Register src);
  protected: // Avoid using the next instructions directly.
   // New cpus require use of movsd and movss to avoid partial register stall
   // when loading from memory. But for old Opteron use movlpd instead of movsd.
   // The selection is done in MacroAssembler::movdbl() and movflt().
   void movss(XMMRegister dst, XMMRegister src);
   void movss(XMMRegister dst, Address src);
   void movss(Address dst, XMMRegister src);
   void movsd(XMMRegister dst, XMMRegister src);
   void movsd(Address dst, XMMRegister src);
   void movsd(XMMRegister dst, Address src);
   void movlpd(XMMRegister dst, Address src);
   // New cpus require use of movaps and movapd to avoid partial register stall
   // when moving between registers.
   void movapd(XMMRegister dst, XMMRegister src);
   void movaps(XMMRegister dst, XMMRegister src);
  public:
   void movdl(XMMRegister dst, Register src);
   void movdl(Register dst, XMMRegister src);
   void movdq(XMMRegister dst, Register src);
   void movdq(Register dst, XMMRegister src);
   void cmovl(Condition cc, Register dst, Register src);
   void cmovl(Condition cc, Register dst, Address src);
   void cmovq(Condition cc, Register dst, Register src);
   void cmovq(Condition cc, Register dst, Address src);
   // Prefetches
  private:
   void prefetch_prefix(Address src);
  public:
   void prefetcht0(Address src);
   void prefetcht1(Address src);
   void prefetcht2(Address src);
   void prefetchnta(Address src);
   void prefetchw(Address src);
   // Arithmetics
   void adcl(Register dst, int imm32);
   void adcl(Register dst, Address src);
   void adcl(Register dst, Register src);
   void adcq(Register dst, int imm32);
   void adcq(Register dst, Address src);
   void adcq(Register dst, Register src);
   void addl(Address dst, int imm32);
   void addl(Address dst, Register src);
   void addl(Register dst, int imm32);
   void addl(Register dst, Address src);
   void addl(Register dst, Register src);
   void addq(Address dst, int imm32);
   void addq(Address dst, Register src);
   void addq(Register dst, int imm32);
   void addq(Register dst, Address src);
   void addq(Register dst, Register src);
   void andl(Register dst, int imm32);
   void andl(Register dst, Address src);
   void andl(Register dst, Register src);
   void andq(Register dst, int imm32);
   void andq(Register dst, Address src);
   void andq(Register dst, Register src);
   void cmpb(Address dst, int imm8);
   void cmpl(Address dst, int imm32);
   void cmpl(Register dst, int imm32);
   void cmpl(Register dst, Register src);
   void cmpl(Register dst, Address src);
   void cmpq(Address dst, int imm32);
   void cmpq(Address dst, Register src);
   void cmpq(Register dst, int imm32);
   void cmpq(Register dst, Register src);
   void cmpq(Register dst, Address src);
   void ucomiss(XMMRegister dst, XMMRegister src);
   void ucomisd(XMMRegister dst, XMMRegister src);
  protected:
   // Don't use next inc() and dec() methods directly. INC & DEC instructions
   // could cause a partial flag stall since they don't set CF flag.
   // Use MacroAssembler::decrement() & MacroAssembler::increment() methods
   // which call inc() & dec() or add() & sub() in accordance with
   // the product flag UseIncDec value.
   void decl(Register dst);
   void decl(Address dst);
   void decq(Register dst);
   void decq(Address dst);
   void incl(Register dst);
   void incl(Address dst);
   void incq(Register dst);
   void incq(Address dst);
  public:
   void idivl(Register src);
   void idivq(Register src);
   void cdql();
   void cdqq();
   void imull(Register dst, Register src);
   void imull(Register dst, Register src, int value);
   void imulq(Register dst, Register src);
   void imulq(Register dst, Register src, int value);
   void leal(Register dst, Address src);
   void leaq(Register dst, Address src);
   void mull(Address src);
   void mull(Register src);
   void negl(Register dst);
   void negq(Register dst);
   void notl(Register dst);
   void notq(Register dst);
   void orl(Address dst, int imm32);
   void orl(Register dst, int imm32);
   void orl(Register dst, Address src);
   void orl(Register dst, Register src);
   void orq(Address dst, int imm32);
   void orq(Register dst, int imm32);
   void orq(Register dst, Address src);
   void orq(Register dst, Register src);
   void rcll(Register dst, int imm8);
   void rclq(Register dst, int imm8);
   void sarl(Register dst, int imm8);
   void sarl(Register dst);
   void sarq(Register dst, int imm8);
   void sarq(Register dst);
   void sbbl(Address dst, int imm32);
   void sbbl(Register dst, int imm32);
   void sbbl(Register dst, Address src);
   void sbbl(Register dst, Register src);
   void sbbq(Address dst, int imm32);
   void sbbq(Register dst, int imm32);
   void sbbq(Register dst, Address src);
   void sbbq(Register dst, Register src);
   void shll(Register dst, int imm8);
   void shll(Register dst);
   void shlq(Register dst, int imm8);
   void shlq(Register dst);
   void shrl(Register dst, int imm8);
   void shrl(Register dst);
   void shrq(Register dst, int imm8);
   void shrq(Register dst);
   void subl(Address dst, int imm32);
   void subl(Address dst, Register src);
   void subl(Register dst, int imm32);
   void subl(Register dst, Address src);
   void subl(Register dst, Register src);
   void subq(Address dst, int imm32);
   void subq(Address dst, Register src);
   void subq(Register dst, int imm32);
   void subq(Register dst, Address src);
   void subq(Register dst, Register src);
   void testb(Register dst, int imm8);
   void testl(Register dst, int imm32);
   void testl(Register dst, Register src);
   void testq(Register dst, int imm32);
   void testq(Register dst, Register src);
   void xaddl(Address dst, Register src);
   void xaddq(Address dst, Register src);
   void xorl(Register dst, int imm32);
   void xorl(Register dst, Address src);
   void xorl(Register dst, Register src);
   void xorq(Register dst, int imm32);
   void xorq(Register dst, Address src);
   void xorq(Register dst, Register src);
   // Miscellaneous
   void bswapl(Register reg);
   void bswapq(Register reg);
   void lock();
   void xchgl(Register reg, Address adr);
   void xchgl(Register dst, Register src);
   void xchgq(Register reg, Address adr);
   void xchgq(Register dst, Register src);
   void cmpxchgl(Register reg, Address adr);
   void cmpxchgq(Register reg, Address adr);
   void nop(int i = 1);
   void addr_nop_4();
   void addr_nop_5();
   void addr_nop_7();
   void addr_nop_8();
   void hlt();
   void ret(int imm16);
   void smovl();
   void rep_movl();
   void rep_movq();
   void rep_set();
   void repne_scanl();
   void repne_scanq();
   void setb(Condition cc, Register dst);
   void clflush(Address adr);
   enum Membar_mask_bits {
     StoreStore = 1 << 3,
     LoadStore  = 1 << 2,
     StoreLoad  = 1 << 1,
     LoadLoad   = 1 << 0
   };
   // Serializes memory.
   void membar(Membar_mask_bits order_constraint) {
     // We only have to handle StoreLoad and LoadLoad
     if (order_constraint & StoreLoad) {
       // MFENCE subsumes LFENCE
       mfence();
     } /* [jk] not needed currently: else if (order_constraint & LoadLoad) {
          lfence();
     } */
   }
   void lfence() {
     emit_byte(0x0F);
     emit_byte(0xAE);
     emit_byte(0xE8);
   }
   void mfence() {
     emit_byte(0x0F);
     emit_byte(0xAE);
     emit_byte(0xF0);
   }
   // Identify processor type and features
   void cpuid() {
     emit_byte(0x0F);
     emit_byte(0xA2);
   }
   void cld() { emit_byte(0xfc);
   }
   void std() { emit_byte(0xfd);
   }
   // Calls
   void call(Label& L, relocInfo::relocType rtype);
   void call(Register reg);
   void call(Address adr);
   // Jumps
   void jmp(Register reg);
   void jmp(Address adr);
   // Label operations & relative jumps (PPUM Appendix D)
   // unconditional jump to L
   void jmp(Label& L, relocInfo::relocType rtype = relocInfo::none);
   // Unconditional 8-bit offset jump to L.
   // WARNING: be very careful using this for forward jumps.  If the label is
   // not bound within an 8-bit offset of this instruction, a run-time error
   // will occur.
   void jmpb(Label& L);
   // jcc is the generic conditional branch generator to run- time
   // routines, jcc is used for branches to labels. jcc takes a branch
   // opcode (cc) and a label (L) and generates either a backward
   // branch or a forward branch and links it to the label fixup
   // chain. Usage:
   //
   // Label L;      // unbound label
   // jcc(cc, L);   // forward branch to unbound label
   // bind(L);      // bind label to the current pc
   // jcc(cc, L);   // backward branch to bound label
   // bind(L);      // illegal: a label may be bound only once
   //
   // Note: The same Label can be used for forward and backward branches
   // but it may be bound only once.
   void jcc(Condition cc, Label& L,
            relocInfo::relocType rtype = relocInfo::none);
   // Conditional jump to a 8-bit offset to L.
   // WARNING: be very careful using this for forward jumps.  If the label is
   // not bound within an 8-bit offset of this instruction, a run-time error
   // will occur.
   void jccb(Condition cc, Label& L);
   // Floating-point operations
   void fxsave(Address dst);
   void fxrstor(Address src);
   void ldmxcsr(Address src);
   void stmxcsr(Address dst);
   void addss(XMMRegister dst, XMMRegister src);
   void addss(XMMRegister dst, Address src);
   void subss(XMMRegister dst, XMMRegister src);
   void subss(XMMRegister dst, Address src);
   void mulss(XMMRegister dst, XMMRegister src);
   void mulss(XMMRegister dst, Address src);
   void divss(XMMRegister dst, XMMRegister src);
   void divss(XMMRegister dst, Address src);
   void addsd(XMMRegister dst, XMMRegister src);
   void addsd(XMMRegister dst, Address src);
   void subsd(XMMRegister dst, XMMRegister src);
   void subsd(XMMRegister dst, Address src);
   void mulsd(XMMRegister dst, XMMRegister src);
   void mulsd(XMMRegister dst, Address src);
   void divsd(XMMRegister dst, XMMRegister src);
   void divsd(XMMRegister dst, Address src);
   // We only need the double form
   void sqrtsd(XMMRegister dst, XMMRegister src);
   void sqrtsd(XMMRegister dst, Address src);
   void xorps(XMMRegister dst, XMMRegister src);
   void xorps(XMMRegister dst, Address src);
   void xorpd(XMMRegister dst, XMMRegister src);
   void xorpd(XMMRegister dst, Address src);
   void cvtsi2ssl(XMMRegister dst, Register src);
   void cvtsi2ssq(XMMRegister dst, Register src);
   void cvtsi2sdl(XMMRegister dst, Register src);
   void cvtsi2sdq(XMMRegister dst, Register src);
   void cvttss2sil(Register dst, XMMRegister src); // truncates
   void cvttss2siq(Register dst, XMMRegister src); // truncates
   void cvttsd2sil(Register dst, XMMRegister src); // truncates
   void cvttsd2siq(Register dst, XMMRegister src); // truncates
   void cvtss2sd(XMMRegister dst, XMMRegister src);
   void cvtsd2ss(XMMRegister dst, XMMRegister src);
   void cvtdq2pd(XMMRegister dst, XMMRegister src);
   void cvtdq2ps(XMMRegister dst, XMMRegister src);
   void pxor(XMMRegister dst, Address src);       // Xor Packed Byte Integer Values
   void pxor(XMMRegister dst, XMMRegister src);   // Xor Packed Byte Integer Values
   void movdqa(XMMRegister dst, Address src);     // Move Aligned Double Quadword
   void movdqa(XMMRegister dst, XMMRegister src);
   void movdqa(Address     dst, XMMRegister src);
   void movq(XMMRegister dst, Address src);
   void movq(Address dst, XMMRegister src);
   void pshufd(XMMRegister dst, XMMRegister src, int mode); // Shuffle Packed Doublewords
   void pshufd(XMMRegister dst, Address src,     int mode);
   void pshuflw(XMMRegister dst, XMMRegister src, int mode); // Shuffle Packed Low Words
   void pshuflw(XMMRegister dst, Address src,     int mode);
   void psrlq(XMMRegister dst, int shift); // Shift Right Logical Quadword Immediate
   void punpcklbw(XMMRegister dst, XMMRegister src); // Interleave Low Bytes
   void punpcklbw(XMMRegister dst, Address src);
 };
 // 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;
  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).
   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
   );
   // This routines should emit JVMTI PopFrame handling and ForceEarlyReturn 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);
  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);
 #ifndef PRODUCT
   static void pd_print_patched_instruction(address branch);
 #endif
   // The following 4 methods return the offset of the appropriate move
   // instruction.  Note: these are 32 bit instructions
   // Support for fast byte/word loading with zero extension (depending
   // on particular CPU)
   int load_unsigned_byte(Register dst, Address src);
   int load_unsigned_word(Register dst, Address src);
   // Support for fast byte/word loading with sign extension (depending
   // on particular CPU)
   int load_signed_byte(Register dst, Address src);
   int load_signed_word(Register dst, Address src);
   // Support for inc/dec with optimal instruction selection depending
   // on value
   void incrementl(Register reg, int value = 1);
   void decrementl(Register reg, int value = 1);
   void incrementq(Register reg, int value = 1);
   void decrementq(Register reg, int value = 1);
   void incrementl(Address dst, int value = 1);
   void decrementl(Address dst, int value = 1);
   void incrementq(Address dst, int value = 1);
   void decrementq(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);
   // Misc
   void fat_nop(); // 5 byte nop
   // 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 store_klass_gap(Register dst, Register src);
   void load_prototype_header(Register dst, Register src);
   void load_heap_oop(Register dst, Address src);
   void store_heap_oop(Address dst, Register src);
   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);
   // 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);
   void int3();
   // 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 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);
   // last Java Frame (fills frame anchor)
   void set_last_Java_frame(Register last_java_sp,
                            Register last_java_fp,
                            address last_java_pc);
   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)
   void g1_write_barrier_pre(Register obj, Register tmp, Register tmp2, bool tosca_live );
   void g1_write_barrier_post(Register store_addr, Register new_val, Register tmp, Register tmp2);
   // 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);
   // Int division/reminder 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/reminder 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);
   // Push and pop integer/fpu/cpu state
   void push_IU_state();
   void pop_IU_state();
   void push_FPU_state();
   void pop_FPU_state();
   void push_CPU_state();
   void pop_CPU_state();
   // 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);
   // Round up to a power of two
   void round_to_l(Register reg, int modulus);
   void round_to_q(Register reg, int modulus);
   // 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
   );
   void tlab_refill(Label& retry_tlab, Label& try_eden, Label& slow_case);
   //----
   // Debugging
   // only if +VerifyOops
   void verify_oop(Register reg, const char* s = "broken oop");
   void verify_oop_addr(Address addr, const char * s = "broken oop addr");
   // if heap base register is used - reinit it with the correct value
   void reinit_heapbase();
   // 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 message and continues
   void warn(const char* msg);
   static void debug(char* msg, int64_t pc, int64_t regs[]);
   void os_breakpoint();
   void untested()
   {
     stop("untested");
   }
   void unimplemented(const char* what = "")
   {
     char* b = new char[1024];
     sprintf(b, "unimplemented: %s", what);
     stop(b);
   }
   void should_not_reach_here()
   {
     stop("should not reach here");
   }
   // 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 offset, Register tmp);
   // 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 must be supplied and is killed.
   // If swap_reg_contains_mark is true then the code assumes that the
   // mark word of the object has already been loaded into swap_reg.
   // 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 cmp8(AddressLiteral src1, int8_t imm32);
   void cmp32(AddressLiteral src1, int32_t src2);
   // compare reg - mem, or reg - &mem
   void cmp32(Register src1, AddressLiteral src2);
   void cmp32(Register src1, Address src2);
 #ifndef _LP64
   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 src);
   // will be cmpreg(?)
   void cmp64(Register src1, AddressLiteral src);
   void cmpxchgptr(Register reg, Address adr);
   void cmpxchgptr(Register reg, AddressLiteral adr);
   // 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 src);
   void lea(Register dst, Address src);
   // Calls
   void call(Label& L, relocInfo::relocType rtype);
   void call(Register entry);
   void call(AddressLiteral entry);
   // Jumps
   // 32bit can do a case table jump in one instruction but we no longer allow the base
   // to be installed in the Address class
   void jump(ArrayAddress entry);
   void jump(AddressLiteral entry);
   void jump_cc(Condition cc, AddressLiteral dst);
   // Floating
   void ldmxcsr(Address src) { Assembler::ldmxcsr(src); }
   void ldmxcsr(AddressLiteral src);
 private:
   // these are private because users should be doing movflt/movdbl
   void movss(XMMRegister dst, XMMRegister src) { Assembler::movss(dst, src); }
   void movss(Address 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 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);
   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);
   // Data
   void movoop(Register dst, jobject obj);
   void movoop(Address dst, jobject obj);
   void movptr(ArrayAddress dst, Register src);
   void movptr(Register dst, AddressLiteral src);
   void movptr(Register dst, intptr_t src);
   void movptr(Address dst, intptr_t src);
   void movptr(Register dst, ArrayAddress src);
   // to avoid hiding movl
   void mov32(AddressLiteral dst, Register src);
   void mov32(Register dst, AddressLiteral src);
   void pushoop(jobject obj);
   // Can push value or effective address
   void pushptr(AddressLiteral src);
 };
 /**
  * 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();
 };
 #ifdef ASSERT
 inline bool AbstractAssembler::pd_check_instruction_mark() { return true; }
 #endif

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/x86/vm/assembler_x86_64.hpp@1ee8caae33af (annotated)

src/cpu/x86/vm/assembler_x86_64.hpp