jdk8-mips64-public/hotspot: src/cpu/mips/vm/assembler

src/cpu/mips/vm/assembler_mips.hpp@4bfb40d1e17a (annotated)

src/cpu/mips/vm/assembler_mips.hpp

Wed, 29 Mar 2017 09:41:51 +0800

author: aoqi
date: Wed, 29 Mar 2017 09:41:51 +0800
changeset 392: 4bfb40d1e17a
parent 391: 910b77f150c4
child 396: 474ce9f32bce
permissions: -rw-r--r--

#4662 TieredCompilation is turned off.
TieredCompilation is not supported yet.

 /*
  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2015, 2016, Loongson Technology. 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_MIPS_VM_ASSEMBLER_MIPS_HPP
 #define CPU_MIPS_VM_ASSEMBLER_MIPS_HPP
 #include "asm/register.hpp"
 class BiasedLockingCounters;
 // 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,
     times_ptr = LP64_ONLY(times_8) NOT_LP64(times_4)
   };
   static ScaleFactor times(int size) {
     assert(size >= 1 && size <= 8 && is_power_of_2(size), "bad scale size");
     if (size == 8)  return times_8;
     if (size == 4)  return times_4;
     if (size == 2)  return times_2;
     return times_1;
   }
  private:
   Register         _base;
   Register         _index;
   ScaleFactor      _scale;
   int              _disp;
   RelocationHolder _rspec;
   // Easily misused constructors make them private
   // %%% can we make these go away?
   //FIXME aoqi
   //NOT_LP64(Address(address loc, RelocationHolder spec);)
   Address(address loc, RelocationHolder spec);
   Address(int disp, address loc, relocInfo::relocType rtype);
   Address(int disp, address loc, RelocationHolder spec);
  public:
  int disp() { return _disp; }
   // 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)
    : _base(base),
      _index(noreg),
      _scale(no_scale),
      _disp(0) {
   }
   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; }
   Register    base()             const { return _base;  }
   Register    index()            const { return _index; }
   ScaleFactor scale()            const { return _scale; }
   int         disp()             const { return _disp;  }
   // 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);
 /*
  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
 };
 // Calling convention
 class Argument VALUE_OBJ_CLASS_SPEC {
  private:
   int _number;
  public:
   enum {
 #ifdef _LP64
     n_register_parameters = 8,   // 8 integer registers used to pass parameters
     n_float_register_parameters = 8   // 4 float registers used to pass parameters
 #else
     n_register_parameters = 4,   // 4 integer registers used to pass parameters
     n_float_register_parameters = 4   // 4 float registers used to pass parameters
 #endif
   };
   Argument(int number):_number(number){ }
   Argument successor() {return Argument(number() + 1);}
   int number()const {return _number;}
   bool is_Register()const {return _number < n_register_parameters;}
   bool is_FloatRegister()const {return _number < n_float_register_parameters;}
   Register as_Register()const {
     assert(is_Register(), "must be a register argument");
     return ::as_Register(A0->encoding() + _number);
   }
   FloatRegister  as_FloatRegister()const {
     assert(is_FloatRegister(), "must be a float register argument");
     return ::as_FloatRegister(F12->encoding() + _number);
   }
   Address as_caller_address()const {return Address(SP, (number() LP64_ONLY( -n_register_parameters)) * wordSize);}
 };
 //
 // 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)
   {}
 #ifdef _LP64
    // 32-bit complains about a multiple declaration for int*.
    AddressLiteral(intptr_t* addr, relocInfo::relocType rtype = relocInfo::none)
      : _target((address) addr),
        _rspec(rspec_from_rtype(rtype, (address) addr)) {}
 #endif
   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;
   RelocationHolder rspec_from_rtype(relocInfo::relocType rtype, address addr) {
     switch (rtype) {
       case relocInfo::external_word_type:
         return external_word_Relocation::spec(addr);
       case relocInfo::internal_word_type:
         return internal_word_Relocation::spec(addr);
       case relocInfo::opt_virtual_call_type:
         return opt_virtual_call_Relocation::spec();
       case relocInfo::static_call_type:
         return static_call_Relocation::spec();
       case relocInfo::runtime_call_type:
         return runtime_call_Relocation::spec();
       case relocInfo::poll_type:
       case relocInfo::poll_return_type:
         return Relocation::spec_simple(rtype);
       case relocInfo::none:
       case relocInfo::oop_type:
         // Oops are a special case. Normally they would be their own section
         // but in cases like icBuffer they are literals in the code stream that
         // we don't have a section for. We use none so that we get a literal address
         // which is always patchable.
         return RelocationHolder();
       default:
         ShouldNotReachHere();
         return RelocationHolder();
     }
   }
 };
 // 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 amd64 can't. 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; }
 };
 const int FPUStateSizeInWords = NOT_LP64(27) LP64_ONLY( 512 / wordSize);
 // The MIPS LOONGSON Assembler: Pure assembler doing NO optimizations on the instruction
 // level ; i.e., what you write is what you get. The Assembler is generating code into
 // a CodeBuffer.
 class Assembler : public AbstractAssembler  {
   friend class AbstractAssembler; // for the non-virtual hack
   friend class LIR_Assembler; // as_Address()
   friend class StubGenerator;
  public:
  public:
   static const int LogInstructionSize = 2;
   static const int InstructionSize    = 1 << LogInstructionSize;
   // opcode, highest 6 bits: bits[31...26]
   enum ops {
     special_op  = 0x00, // special_ops
     regimm_op   = 0x01, // regimm_ops
     j_op        = 0x02,
     jal_op      = 0x03,
     beq_op      = 0x04,
     bne_op      = 0x05,
     blez_op     = 0x06,
     bgtz_op     = 0x07,
     addi_op     = 0x08,
     addiu_op    = 0x09,
     slti_op     = 0x0a,
     sltiu_op    = 0x0b,
     andi_op     = 0x0c,
     ori_op      = 0x0d,
     xori_op     = 0x0e,
     lui_op      = 0x0f,
     cop0_op     = 0x10, // cop0_ops
     cop1_op     = 0x11, // cop1_ops
     gs_cop2_op  = 0x12, // gs_cop2_ops
     cop1x_op    = 0x13, // cop1x_ops
     beql_op     = 0x14,
     bnel_op     = 0x15,
     blezl_op    = 0x16,
     bgtzl_op    = 0x17,
     daddi_op    = 0x18,
     daddiu_op   = 0x19,
     ldl_op      = 0x1a,
     ldr_op      = 0x1b,
     special2_op = 0x1c, // special2_ops
     msa_op      = 0x1e, // msa_ops
     special3_op = 0x1f, // special3_ops
     lb_op       = 0x20,
     lh_op       = 0x21,
     lwl_op      = 0x22,
     lw_op       = 0x23,
     lbu_op      = 0x24,
     lhu_op      = 0x25,
     lwr_op      = 0x26,
     lwu_op      = 0x27,
     sb_op       = 0x28,
     sh_op       = 0x29,
     swl_op      = 0x2a,
     sw_op       = 0x2b,
     sdl_op      = 0x2c,
     sdr_op      = 0x2d,
     swr_op      = 0x2e,
     cache_op    = 0x2f,
     ll_op       = 0x30,
     lwc1_op     = 0x31,
     gs_lwc2_op  = 0x32, //gs_lwc2_ops
     pref_op     = 0x33,
     lld_op      = 0x34,
     ldc1_op     = 0x35,
     gs_ldc2_op  = 0x36, //gs_ldc2_ops
     ld_op       = 0x37,
     sc_op       = 0x38,
     swc1_op     = 0x39,
     gs_swc2_op  = 0x3a, //gs_swc2_ops
     scd_op      = 0x3c,
     sdc1_op     = 0x3d,
     gs_sdc2_op  = 0x3e, //gs_sdc2_ops
     sd_op       = 0x3f
   };
   static  const char *ops_name[];
   //special family, the opcode is in low 6 bits.
   enum special_ops {
     sll_op       = 0x00,
     movci_op     = 0x01,
     srl_op       = 0x02,
     sra_op       = 0x03,
     sllv_op      = 0x04,
     srlv_op      = 0x06,
     srav_op      = 0x07,
     jr_op        = 0x08,
     jalr_op      = 0x09,
     movz_op      = 0x0a,
     movn_op      = 0x0b,
     syscall_op   = 0x0c,
     break_op     = 0x0d,
     sync_op      = 0x0f,
     mfhi_op      = 0x10,
     mthi_op      = 0x11,
     mflo_op      = 0x12,
     mtlo_op      = 0x13,
     dsllv_op     = 0x14,
     dsrlv_op     = 0x16,
     dsrav_op     = 0x17,
     mult_op      = 0x18,
     multu_op     = 0x19,
     div_op       = 0x1a,
     divu_op      = 0x1b,
     dmult_op     = 0x1c,
     dmultu_op    = 0x1d,
     ddiv_op      = 0x1e,
     ddivu_op     = 0x1f,
     add_op       = 0x20,
     addu_op      = 0x21,
     sub_op       = 0x22,
     subu_op      = 0x23,
     and_op       = 0x24,
     or_op        = 0x25,
     xor_op       = 0x26,
     nor_op       = 0x27,
     slt_op       = 0x2a,
     sltu_op      = 0x2b,
     dadd_op      = 0x2c,
     daddu_op     = 0x2d,
     dsub_op      = 0x2e,
     dsubu_op     = 0x2f,
     tge_op       = 0x30,
     tgeu_op      = 0x31,
     tlt_op       = 0x32,
     tltu_op      = 0x33,
     teq_op       = 0x34,
     tne_op       = 0x36,
     dsll_op      = 0x38,
     dsrl_op      = 0x3a,
     dsra_op      = 0x3b,
     dsll32_op    = 0x3c,
     dsrl32_op    = 0x3e,
     dsra32_op    = 0x3f
   };
   static  const char* special_name[];
   //regimm family, the opcode is in rt[16...20], 5 bits
   enum regimm_ops {
     bltz_op      = 0x00,
     bgez_op      = 0x01,
     bltzl_op     = 0x02,
     bgezl_op     = 0x03,
     tgei_op      = 0x08,
     tgeiu_op     = 0x09,
     tlti_op      = 0x0a,
     tltiu_op     = 0x0b,
     teqi_op      = 0x0c,
     tnei_op      = 0x0e,
     bltzal_op    = 0x10,
     bgezal_op    = 0x11,
     bltzall_op   = 0x12,
     bgezall_op   = 0x13,
     bposge32_op  = 0x1c,
     bposge64_op  = 0x1d,
     synci_op     = 0x1f,
   };
   static  const char* regimm_name[];
   //cop0 family, the ops is in bits[25...21], 5 bits
   enum cop0_ops {
     mfc0_op     = 0x00,
     dmfc0_op    = 0x01,
     //
     mxgc0_op    = 0x03, //MFGC0, DMFGC0, MTGC0
     mtc0_op     = 0x04,
     dmtc0_op    = 0x05,
     rdpgpr_op   = 0x0a,
     inter_op    = 0x0b,
     wrpgpr_op   = 0x0c
   };
   //cop1 family, the ops is in bits[25...21], 5 bits
   enum cop1_ops {
     mfc1_op     = 0x00,
     dmfc1_op    = 0x01,
     cfc1_op     = 0x02,
     mfhc1_op    = 0x03,
     mtc1_op     = 0x04,
     dmtc1_op    = 0x05,
     ctc1_op     = 0x06,
     mthc1_op    = 0x07,
     bc1f_op     = 0x08,
     single_fmt  = 0x10,
     double_fmt  = 0x11,
     word_fmt    = 0x14,
     long_fmt    = 0x15,
     ps_fmt      = 0x16
   };
   //2 bist (bits[17...16]) of bc1x instructions (cop1)
   enum bc_ops {
     bcf_op       = 0x0,
     bct_op       = 0x1,
     bcfl_op      = 0x2,
     bctl_op      = 0x3,
   };
   // low 6 bits of c_x_fmt instructions (cop1)
   enum c_conds {
     f_cond       = 0x30,
     un_cond      = 0x31,
     eq_cond      = 0x32,
     ueq_cond     = 0x33,
     olt_cond     = 0x34,
     ult_cond     = 0x35,
     ole_cond     = 0x36,
     ule_cond     = 0x37,
     sf_cond      = 0x38,
     ngle_cond    = 0x39,
     seq_cond     = 0x3a,
     ngl_cond     = 0x3b,
     lt_cond      = 0x3c,
     nge_cond     = 0x3d,
     le_cond      = 0x3e,
     ngt_cond     = 0x3f
   };
   // low 6 bits of cop1 instructions
   enum float_ops {
     fadd_op      = 0x00,
     fsub_op      = 0x01,
     fmul_op      = 0x02,
     fdiv_op      = 0x03,
     fsqrt_op     = 0x04,
     fabs_op      = 0x05,
     fmov_op      = 0x06,
     fneg_op      = 0x07,
     froundl_op   = 0x08,
     ftruncl_op   = 0x09,
     fceill_op    = 0x0a,
     ffloorl_op   = 0x0b,
     froundw_op   = 0x0c,
     ftruncw_op   = 0x0d,
     fceilw_op    = 0x0e,
     ffloorw_op   = 0x0f,
     movf_f_op    = 0x11,
     movt_f_op    = 0x11,
     movz_f_op    = 0x12,
     movn_f_op    = 0x13,
     frecip_op    = 0x15,
     frsqrt_op    = 0x16,
     fcvts_op     = 0x20,
     fcvtd_op     = 0x21,
     fcvtw_op     = 0x24,
     fcvtl_op     = 0x25,
     fcvtps_op    = 0x26,
     fcvtspl_op   = 0x28,
     fpll_op      = 0x2c,
     fplu_op      = 0x2d,
     fpul_op      = 0x2e,
     fpuu_op      = 0x2f
   };
   static const char* cop1_name[];
   //cop1x family, the opcode is in low 6 bits.
   enum cop1x_ops {
     lwxc1_op    = 0x00,
     ldxc1_op    = 0x01,
     luxc1_op    = 0x05,
     swxc1_op    = 0x08,
     sdxc1_op    = 0x09,
     suxc1_op    = 0x0d,
     prefx_op    = 0x0f,
     alnv_ps_op  = 0x1e,
     madd_s_op   = 0x20,
     madd_d_op   = 0x21,
     madd_ps_op  = 0x26,
     msub_s_op   = 0x28,
     msub_d_op   = 0x29,
     msub_ps_op  = 0x2e,
     nmadd_s_op  = 0x30,
     nmadd_d_op  = 0x31,
     nmadd_ps_op = 0x36,
     nmsub_s_op  = 0x38,
     nmsub_d_op  = 0x39,
     nmsub_ps_op = 0x3e
   };
   static const char* cop1x_name[];
   //special2 family, the opcode is in low 6 bits.
   enum special2_ops {
     madd_op       = 0x00,
     maddu_op      = 0x01,
     mul_op        = 0x02,
     gs0x03_op     = 0x03,
     msub_op       = 0x04,
     msubu_op      = 0x05,
     gs0x06_op     = 0x06,
     gsemul2_op    = 0x07,
     gsemul3_op    = 0x08,
     gsemul4_op    = 0x09,
     gsemul5_op    = 0x0a,
     gsemul6_op    = 0x0b,
     gsemul7_op    = 0x0c,
     gsemul8_op    = 0x0d,
     gsemul9_op    = 0x0e,
     gsemul10_op   = 0x0f,
     gsmult_op     = 0x10,
     gsdmult_op    = 0x11,
     gsmultu_op    = 0x12,
     gsdmultu_op   = 0x13,
     gsdiv_op      = 0x14,
     gsddiv_op     = 0x15,
     gsdivu_op     = 0x16,
     gsddivu_op    = 0x17,
     gsmod_op      = 0x1c,
     gsdmod_op     = 0x1d,
     gsmodu_op     = 0x1e,
     gsdmodu_op    = 0x1f,
     clz_op        = 0x20,
     clo_op        = 0x21,
     xctx_op       = 0x22, //ctz, cto, dctz, dcto, gsX
     gsrxr_x_op    = 0x23, //gsX
     dclz_op       = 0x24,
     dclo_op       = 0x25,
     gsle_op       = 0x26,
     gsgt_op       = 0x27,
     gs86j_op      = 0x28,
     gsloop_op     = 0x29,
     gsaj_op       = 0x2a,
     gsldpc_op     = 0x2b,
     gs86set_op    = 0x30,
     gstm_op       = 0x31,
     gscvt_ld_op   = 0x32,
     gscvt_ud_op   = 0x33,
     gseflag_op    = 0x34,
     gscam_op      = 0x35,
     gstop_op      = 0x36,
     gssettag_op   = 0x37,
     gssdbbp_op    = 0x38
   };
   static  const char* special2_name[];
   // special3 family, the opcode is in low 6 bits.
   enum special3_ops {
     ext_op         = 0x00,
     dextm_op       = 0x01,
     dextu_op       = 0x02,
     dext_op        = 0x03,
     ins_op         = 0x04,
     dinsm_op       = 0x05,
     dinsu_op       = 0x06,
     dins_op        = 0x07,
     lxx_op         = 0x0a, //lwx, lhx, lbux, ldx
     insv_op        = 0x0c,
     dinsv_op       = 0x0d,
     ar1_op         = 0x10, //MIPS DSP
     cmp1_op        = 0x11, //MIPS DSP
     re1_op         = 0x12, //MIPS DSP, re1_ops
     sh1_op         = 0x13, //MIPS DSP
     ar2_op         = 0x14, //MIPS DSP
     cmp2_op        = 0x15, //MIPS DSP
     re2_op         = 0x16, //MIPS DSP, re2_ops
     sh2_op         = 0x17, //MIPS DSP
     ar3_op         = 0x18, //MIPS DSP
     bshfl_op       = 0x20  //seb, seh
   };
   // re1_ops
   enum re1_ops {
     absq_s_qb_op = 0x01,
     repl_qb_op   = 0x02,
     replv_qb_op  = 0x03,
     absq_s_ph_op = 0x09,
     repl_ph_op   = 0x0a,
     replv_ph_op  = 0x0b,
     absq_s_w_op  = 0x11,
     bitrev_op    = 0x1b
   };
   // re2_ops
   enum re2_ops {
     repl_ob_op   = 0x02,
     replv_ob_op  = 0x03,
     absq_s_qh_op = 0x09,
     repl_qh_op   = 0x0a,
     replv_qh_op  = 0x0b,
     absq_s_pw_op = 0x11,
     repl_pw_op   = 0x12,
     replv_pw_op  = 0x13,
   };
   static  const char* special3_name[];
   // lwc2/gs_lwc2 family, the opcode is in low 6 bits.
   enum gs_lwc2_ops {
     gslble_op       = 0x10,
     gslbgt_op       = 0x11,
     gslhle_op       = 0x12,
     gslhgt_op       = 0x13,
     gslwle_op       = 0x14,
     gslwgt_op       = 0x15,
     gsldle_op       = 0x16,
     gsldgt_op       = 0x17,
     gslwlec1_op     = 0x1c,
     gslwgtc1_op     = 0x1d,
     gsldlec1_op     = 0x1e,
     gsldgtc1_op     = 0x1f,
     gslq_op         = 0x20
   };
   static const char* gs_lwc2_name[];
   // ldc2/gs_ldc2 family, the opcode is in low 3 bits.
   enum gs_ldc2_ops {
     gslbx_op        =  0x0,
     gslhx_op        =  0x1,
     gslwx_op        =  0x2,
     gsldx_op        =  0x3,
     gslwxc1_op      =  0x6,
     gsldxc1_op      =  0x7
   };
   static const char* gs_ldc2_name[];
   // swc2/gs_swc2 family, the opcode is in low 6 bits.
   enum gs_swc2_ops {
     gssble_op       = 0x10,
     gssbgt_op       = 0x11,
     gsshle_op       = 0x12,
     gsshgt_op       = 0x13,
     gsswle_op       = 0x14,
     gsswgt_op       = 0x15,
     gssdle_op       = 0x16,
     gssdgt_op       = 0x17,
     gsswlec1_op     = 0x1c,
     gsswgtc1_op     = 0x1d,
     gssdlec1_op     = 0x1e,
     gssdgtc1_op     = 0x1f,
     gssq_op         = 0x20
   };
   static const char* gs_swc2_name[];
   // sdc2/gs_sdc2 family, the opcode is in low 3 bits.
   enum gs_sdc2_ops {
     gssbx_op        =  0x0,
     gsshx_op        =  0x1,
     gsswx_op        =  0x2,
     gssdx_op        =  0x3,
     gsswxc1_op      =  0x6,
     gssdxc1_op      =  0x7
   };
   static const char* gs_sdc2_name[];
   /* 2013.10.16 Jin: merge from OpenJDK 8 */
   enum WhichOperand {
     // input to locate_operand, and format code for relocations
     imm_operand  = 0,            // embedded 32-bit|64-bit immediate operand
     disp32_operand = 1,          // embedded 32-bit displacement or address
     call32_operand = 2,          // embedded 32-bit self-relative displacement
 #ifndef _LP64
     _WhichOperand_limit = 3
 #else
      narrow_oop_operand = 3,     // embedded 32-bit immediate narrow oop
     _WhichOperand_limit = 4
 #endif
   };
   static int opcode(int insn) { return (insn>>26)&0x3f; }
   static int rs(int insn) { return (insn>>21)&0x1f; }
   static int rt(int insn) { return (insn>>16)&0x1f; }
   static int rd(int insn) { return (insn>>11)&0x1f; }
   static int sa(int insn) { return (insn>>6)&0x1f; }
   static int special(int insn) { return insn&0x3f; }
   static int imm_off(int insn) { return (short)low16(insn); }
   static int low  (int x, int l) { return bitfield(x, 0, l); }
   static int low16(int x)        { return low(x, 16); }
   static int low26(int x)        { return low(x, 26); }
  protected:
   //help methods for instruction ejection
   // I-Type (Immediate)
   // 31        26 25        21 20      16 15                              0
   //|   opcode   |      rs    |    rt    |            immediat             |
   //|            |            |          |                                 |
   //      6              5          5                     16
   static int insn_ORRI(int op, int rs, int rt, int imm) { return (op<<26) | (rs<<21) | (rt<<16) | low16(imm); }
   // R-Type (Register)
   // 31         26 25        21 20      16 15      11 10         6 5         0
   //|   special   |      rs    |    rt    |    rd    |     0      |   opcode  |
   //| 0 0 0 0 0 0 |            |          |          | 0 0 0 0 0  |           |
   //      6              5          5           5          5            6
   static int insn_RRRO(int rs, int rt, int rd,   int op) { return (rs<<21) | (rt<<16) | (rd<<11)  | op; }
   static int insn_RRSO(int rt, int rd, int sa,   int op) { return (rt<<16) | (rd<<11) | (sa<<6)   | op; }
   static int insn_RRCO(int rs, int rt, int code, int op) { return (rs<<21) | (rt<<16) | (code<<6) | op; }
   static int insn_COP0(int op, int rt, int rd) { return (cop0_op<<26) | (op<<21) | (rt<<16) | (rd<<11); }
   static int insn_COP1(int op, int rt, int fs) { return (cop1_op<<26) | (op<<21) | (rt<<16) | (fs<<11); }
   static int insn_F3RO(int fmt, int ft, int fs, int fd, int func) {
     return (cop1_op<<26) | (fmt<<21) | (ft<<16) | (fs<<11) | (fd<<6) | func;
   }
   static int insn_F3ROX(int fmt, int ft, int fs, int fd, int func) {
     return (cop1x_op<<26) | (fmt<<21) | (ft<<16) | (fs<<11) | (fd<<6) | func;
   }
   //static int low  (int x, int l) { return bitfield(x, 0, l); }
   //static int low16(int x)        { return low(x, 16); }
   //static int low26(int x)        { return low(x, 26); }
   static int high  (int x, int l) { return bitfield(x, 32-l, l); }
   static int high16(int x)        { return high(x, 16); }
   static int high6 (int x)        { return high(x, 6); }
   //get the offset field of jump/branch instruction
   int offset(address entry) {
     assert(is_simm16((entry - pc() - 4) / 4), "change this code");
     if (!is_simm16((entry - pc() - 4) / 4)) {
       tty->print_cr("!!! is_simm16: %x", (entry - pc() - 4) / 4);
     }
     return (entry - pc() - 4) / 4;
   }
 public:
   using AbstractAssembler::offset;
   //sign expand with the sign bit is h
   static int expand(int x, int h) { return -(x & (1<<h)) | x;  }
   // If x is a mask, return the number of one-bit in x.
   // else return -1.
   static int is_int_mask(int x);
   // If x is a mask, return the number of one-bit in x.
   // else return -1.
   static int is_jlong_mask(jlong x);
   // MIPS lui/addiu is both sign extended, so if you wan't to use off32/imm32, you have to use the follow three
   static int split_low(int x) {
     return (x & 0xffff);
   }
   static int split_high(int x) {
     return ( (x >> 16) + ((x & 0x8000) != 0) ) & 0xffff;
   }
   static int merge(int low, int high) {
     return expand(low, 15) + (high<<16);
   }
 #ifdef _LP64
   static intptr_t merge(intptr_t x0, intptr_t x16, intptr_t x32, intptr_t x48) {
     return (x48 << 48) | (x32 << 32) | (x16 << 16) | x0;
   }
 #endif
   // modified by spark 2005/08/18
   static bool is_simm  (int x, int nbits) { return -( 1 << nbits-1 )  <= x   &&   x  <  ( 1 << nbits-1 ); }
   static bool is_simm16(int x)            { return is_simm(x, 16); }
   static bool fit_in_jal(address target, address pc) {
 #ifdef _LP64
         int dst = ((intptr_t)target - (((intptr_t)pc + 4) & 0xfffffffff0000000))>>2;
 #else
         int dst = ((intptr_t)target - (((intptr_t)pc + 4) & 0xf0000000))>>2;
 #endif
         if ((dst >= 0) && (dst < (1<<26))) return true;
         else return false;
   }
   bool fit_int_branch(address entry) {
     return is_simm16(offset(entry));
   }
 protected:
 #ifdef ASSERT
     #define CHECK_DELAY
 #endif
 #ifdef CHECK_DELAY
   enum Delay_state { no_delay, at_delay_slot, filling_delay_slot } delay_state;
 #endif
 public:
   void assert_not_delayed() {
 #ifdef CHECK_DELAY
     assert_not_delayed("next instruction should not be a delay slot");
 #endif
   }
   void assert_not_delayed(const char* msg) {
 #ifdef CHECK_DELAY
     //guarantee( delay_state == no_delay, msg );
     //aoqi_test
     if(delay_state != no_delay){
     tty->print_cr("%s:%d, pc: %lx", __func__, __LINE__, pc());
     }
     assert(delay_state == no_delay, msg);
 #endif
   }
 protected:
   // Delay slot helpers
   // cti is called when emitting control-transfer instruction,
   // BEFORE doing the emitting.
   // Only effective when assertion-checking is enabled.
   // called when emitting cti with a delay slot, AFTER emitting
   void has_delay_slot() {
 #ifdef CHECK_DELAY
     assert_not_delayed("just checking");
     delay_state = at_delay_slot;
 #endif
   }
 public:
   Assembler* delayed() {
 #ifdef CHECK_DELAY
     guarantee( delay_state == at_delay_slot, "delayed instructition is not in delay slot");
     delay_state = filling_delay_slot;
 #endif
     return this;
   }
   void flush() {
 #ifdef CHECK_DELAY
     guarantee( delay_state == no_delay, "ending code with a delay slot");
 #endif
     AbstractAssembler::flush();
   }
   inline void emit_long(int);  // shadows AbstractAssembler::emit_long
   inline void emit_data(int x) { emit_long(x); }
   inline void emit_data(int, RelocationHolder const&);
   inline void emit_data(int, relocInfo::relocType rtype);
   inline void check_delay();
   // Generic instructions
   // Does 32bit or 64bit as needed for the platform. In some sense these
   // belong in macro assembler but there is no need for both varieties to exist
 #ifndef _LP64
   void add(Register rd, Register rs, Register rt)  { emit_long(insn_RRRO((int)rs->encoding(), (int)rt->encoding(), (int)rd->encoding(), add_op)); }
   void addi(Register rt, Register rs, int imm)     { emit_long(insn_ORRI(addi_op, (int)rs->encoding(), (int)rt->encoding(), imm)); }
   void addiu(Register rt, Register rs, int imm)    { emit_long(insn_ORRI(addiu_op, (int)rs->encoding(), (int)rt->encoding(), imm)); }
   void addu(Register rd, Register rs, Register rt) { emit_long(insn_RRRO((int)rs->encoding(), (int)rt->encoding(), (int)rd->encoding(), addu_op)); }
 #else
   void add(Register rd, Register rs, Register rt)   { dadd    (rd, rs, rt); }
   void add32(Register rd, Register rs, Register rt) { emit_long(insn_RRRO((int)rs->encoding(), (int)rt->encoding(), (int)rd->encoding(), add_op)); }
   void addu32(Register rd, Register rs, Register rt){ emit_long(insn_RRRO((int)rs->encoding(), (int)rt->encoding(), (int)rd->encoding(), addu_op)); }
   void addiu32(Register rt, Register rs, int imm)   { emit_long(insn_ORRI(addiu_op, (int)rs->encoding(), (int)rt->encoding(), imm)); }
   void addi(Register rt, Register rs, int imm)      { daddi  (rt, rs, imm);}
   void addiu(Register rt, Register rs, int imm)     { daddiu (rt, rs, imm);}
   void addu(Register rd, Register rs, Register rt)  { daddu  (rd, rs, rt);  }
 #endif
   void andr(Register rd, Register rs, Register rt) { emit_long(insn_RRRO((int)rs->encoding(), (int)rt->encoding(), (int)rd->encoding(), and_op)); }
   void andi(Register rt, Register rs, int imm)     { emit_long(insn_ORRI(andi_op, (int)rs->encoding(), (int)rt->encoding(), imm)); }
   void beq    (Register rs, Register rt, int off)  { emit_long(insn_ORRI(beq_op, (int)rs->encoding(), (int)rt->encoding(), off)); has_delay_slot(); }
   void beql   (Register rs, Register rt, int off)  { emit_long(insn_ORRI(beql_op, (int)rs->encoding(), (int)rt->encoding(), off)); has_delay_slot(); }
   void bgez   (Register rs, int off) { emit_long(insn_ORRI(regimm_op, (int)rs->encoding(), bgez_op, off)); has_delay_slot(); }
   void bgezal (Register rs, int off) { emit_long(insn_ORRI(regimm_op, (int)rs->encoding(), bgezal_op, off)); has_delay_slot(); }
   void bgezall(Register rs, int off) { emit_long(insn_ORRI(regimm_op, (int)rs->encoding(), bgezall_op, off)); has_delay_slot(); }
   void bgezl  (Register rs, int off) { emit_long(insn_ORRI(regimm_op, (int)rs->encoding(), bgezl_op, off)); has_delay_slot(); }
   void bgtz   (Register rs, int off) { emit_long(insn_ORRI(bgtz_op,   (int)rs->encoding(), 0, off)); has_delay_slot(); }
   void bgtzl  (Register rs, int off) { emit_long(insn_ORRI(bgtzl_op,  (int)rs->encoding(), 0, off)); has_delay_slot(); }
   void blez   (Register rs, int off) { emit_long(insn_ORRI(blez_op,   (int)rs->encoding(), 0, off)); has_delay_slot(); }
   void blezl  (Register rs, int off) { emit_long(insn_ORRI(blezl_op,  (int)rs->encoding(), 0, off)); has_delay_slot(); }
   void bltz   (Register rs, int off) { emit_long(insn_ORRI(regimm_op, (int)rs->encoding(), bltz_op, off)); has_delay_slot(); }
   void bltzal (Register rs, int off) { emit_long(insn_ORRI(regimm_op, (int)rs->encoding(), bltzal_op, off)); has_delay_slot(); }
   void bltzall(Register rs, int off) { emit_long(insn_ORRI(regimm_op, (int)rs->encoding(), bltzall_op, off)); has_delay_slot(); }
   void bltzl  (Register rs, int off) { emit_long(insn_ORRI(regimm_op, (int)rs->encoding(), bltzl_op, off)); has_delay_slot(); }
   void bne    (Register rs, Register rt, int off) { emit_long(insn_ORRI(bne_op,  (int)rs->encoding(), (int)rt->encoding(), off)); has_delay_slot(); }
   void bnel   (Register rs, Register rt, int off) { emit_long(insn_ORRI(bnel_op, (int)rs->encoding(), (int)rt->encoding(), off)); has_delay_slot(); }
   void brk    (int code) { emit_long(break_op | (code<<16)); }
   void beq    (Register rs, Register rt, address entry) { beq(rs, rt, offset(entry)); }
   void beql   (Register rs, Register rt, address entry) { beql(rs, rt, offset(entry));}
   void bgez   (Register rs, address entry) { bgez   (rs, offset(entry)); }
   void bgezal (Register rs, address entry) { bgezal (rs, offset(entry)); }
   void bgezall(Register rs, address entry) { bgezall(rs, offset(entry)); }
   void bgezl  (Register rs, address entry) { bgezl  (rs, offset(entry)); }
   void bgtz   (Register rs, address entry) { bgtz   (rs, offset(entry)); }
   void bgtzl  (Register rs, address entry) { bgtzl  (rs, offset(entry)); }
   void blez   (Register rs, address entry) { blez   (rs, offset(entry)); }
   void blezl  (Register rs, address entry) { blezl  (rs, offset(entry)); }
   void bltz   (Register rs, address entry) { bltz   (rs, offset(entry)); }
   void bltzal (Register rs, address entry) { bltzal (rs, offset(entry)); }
   void bltzall(Register rs, address entry) { bltzall(rs, offset(entry)); }
   void bltzl  (Register rs, address entry) { bltzl  (rs, offset(entry)); }
   void bne    (Register rs, Register rt, address entry) { bne(rs, rt, offset(entry)); }
   void bnel   (Register rs, Register rt, address entry) { bnel(rs, rt, offset(entry)); }
   void beq    (Register rs, Register rt, Label& L) { beq(rs, rt, target(L)); }
   void beql   (Register rs, Register rt, Label& L) { beql(rs, rt, target(L)); }
   void bgez   (Register rs, Label& L){ bgez   (rs, target(L)); }
   void bgezal (Register rs, Label& L){ bgezal (rs, target(L)); }
   void bgezall(Register rs, Label& L){ bgezall(rs, target(L)); }
   void bgezl  (Register rs, Label& L){ bgezl  (rs, target(L)); }
   void bgtz   (Register rs, Label& L){ bgtz   (rs, target(L)); }
   void bgtzl  (Register rs, Label& L){ bgtzl  (rs, target(L)); }
   void blez   (Register rs, Label& L){ blez   (rs, target(L)); }
   void blezl  (Register rs, Label& L){ blezl  (rs, target(L)); }
   void bltz   (Register rs, Label& L){ bltz   (rs, target(L)); }
   void bltzal (Register rs, Label& L){ bltzal (rs, target(L)); }
   void bltzall(Register rs, Label& L){ bltzall(rs, target(L)); }
   void bltzl  (Register rs, Label& L){ bltzl  (rs, target(L)); }
   void bne    (Register rs, Register rt, Label& L){ bne(rs, rt, target(L)); }
   void bnel   (Register rs, Register rt, Label& L){ bnel(rs, rt, target(L)); }
   void dadd  (Register rd, Register rs, Register rt) { emit_long(insn_RRRO((int)rs->encoding(), (int)rt->encoding(), (int)rd->encoding(), dadd_op)); }
   void daddi (Register rt, Register rs, int imm)     { emit_long(insn_ORRI(daddi_op,  (int)rs->encoding(), (int)rt->encoding(), imm)); }
   void daddiu(Register rt, Register rs, int imm)     { emit_long(insn_ORRI(daddiu_op, (int)rs->encoding(), (int)rt->encoding(), imm)); }
   void daddu (Register rd, Register rs, Register rt) { emit_long(insn_RRRO((int)rs->encoding(), (int)rt->encoding(), (int)rd->encoding(), daddu_op)); }
   void ddiv  (Register rs, Register rt)              { emit_long(insn_RRRO((int)rs->encoding(), (int)rt->encoding(), 0, ddiv_op));  }
   void ddivu (Register rs, Register rt)              { emit_long(insn_RRRO((int)rs->encoding(), (int)rt->encoding(), 0, ddivu_op)); }
   void movz  (Register rd, Register rs,   Register rt) { emit_long(insn_RRRO((int)rs->encoding(),  (int)rt->encoding(),   (int)rd->encoding(), movz_op)); }
   void movn  (Register rd, Register rs,   Register rt) { emit_long(insn_RRRO((int)rs->encoding(),  (int)rt->encoding(),   (int)rd->encoding(), movn_op)); }
   void movt  (Register rd, Register rs) { emit_long(((int)rs->encoding() << 21) | (1 << 16) | ((int)rd->encoding() << 11) | movci_op); }
   void movf  (Register rd, Register rs) { emit_long(((int)rs->encoding() << 21) | ((int)rd->encoding() << 11) | movci_op); }
   enum bshfl_ops {
      seb_op = 0x10,
      seh_op = 0x18
   };
   void seb  (Register rd, Register rt) { emit_long((special3_op << 26) | ((int)rt->encoding() << 16) | ((int)rd->encoding() << 11) | (seb_op << 6) | bshfl_op); }
   void seh  (Register rd, Register rt) { emit_long((special3_op << 26) | ((int)rt->encoding() << 16) | ((int)rd->encoding() << 11) | (seh_op << 6) | bshfl_op); }
   void ext  (Register rt, Register rs, int pos, int size) {
      guarantee((0 <= pos) && (pos < 32), "pos must be in [0, 32)");
      guarantee((0 < size) && (size <= 32), "size must be in (0, 32]");
      guarantee((0 < pos + size) && (pos + size <= 32), "pos + size must be in (0, 32]");
      int lsb  = pos;
      int msbd = size - 1;
      emit_long((special3_op << 26) | ((int)rs->encoding() << 21) | ((int)rt->encoding() << 16) | (msbd << 11) | (lsb << 6) | ext_op);
   }
   void dext  (Register rt, Register rs, int pos, int size) {
      guarantee((0 <= pos) && (pos < 32), "pos must be in [0, 32)");
      guarantee((0 < size) && (size <= 32), "size must be in (0, 32]");
      guarantee((0 < pos + size) && (pos + size <= 63), "pos + size must be in (0, 63]");
      int lsb  = pos;
      int msbd = size - 1;
      emit_long((special3_op << 26) | ((int)rs->encoding() << 21) | ((int)rt->encoding() << 16) | (msbd << 11) | (lsb << 6) | dext_op);
   }
   void rotr (Register rd, Register rt, int sa) {
      emit_long((special_op << 26) | (1 << 21) | ((int)rt->encoding() << 16) | ((int)rd->encoding() << 11) | (low(sa, 5) << 6) | srl_op);
   }
   void drotr (Register rd, Register rt, int sa) {
      emit_long((special_op << 26) | (1 << 21) | ((int)rt->encoding() << 16) | ((int)rd->encoding() << 11) | (low(sa, 5) << 6) | dsrl_op);
   }
   void drotr32 (Register rd, Register rt, int sa) {
      emit_long((special_op << 26) | (1 << 21) | ((int)rt->encoding() << 16) | ((int)rd->encoding() << 11) | (low(sa, 5) << 6) | dsrl32_op);
   }
   void rotrv (Register rd, Register rt, Register rs) {
      emit_long((special_op << 26) | ((int)rs->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)rd->encoding() << 11) | (1 << 6) | srlv_op);
   }
   void drotrv (Register rd, Register rt, Register rs) {
      emit_long((special_op << 26) | ((int)rs->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)rd->encoding() << 11) | (1 << 6) | dsrlv_op);
   }
 // Do mult and div need both 32-bit and 64-bit version? FIXME aoqi
 //#ifndef _LP64
 #if 1
   void div   (Register rs, Register rt)              { emit_long(insn_RRRO((int)rs->encoding(), (int)rt->encoding(), 0, div_op)); }
   void divu  (Register rs, Register rt)              { emit_long(insn_RRRO((int)rs->encoding(), (int)rt->encoding(), 0, divu_op)); }
 #else
   void div   (Register rs, Register rt)              { ddiv (rs, rt);}
   void divu  (Register rs, Register rt)              { ddivu(rs, rt);}
 #endif
   void dmult (Register rs, Register rt)              { emit_long(insn_RRRO((int)rs->encoding(), (int)rt->encoding(), 0, dmult_op)); }
   void dmultu(Register rs, Register rt)              { emit_long(insn_RRRO((int)rs->encoding(), (int)rt->encoding(), 0, dmultu_op)); }
   void dsll  (Register rd, Register rt , int sa)     { emit_long(insn_RRSO((int)rt->encoding(), (int)rd->encoding(), sa, dsll_op)); }
   void dsllv (Register rd, Register rt, Register rs) { emit_long(insn_RRRO((int)rs->encoding(), (int)rt->encoding(), (int)rd->encoding(), dsllv_op)); }
   void dsll32(Register rd, Register rt , int sa)     { emit_long(insn_RRSO((int)rt->encoding(), (int)rd->encoding(), sa, dsll32_op)); }
   void dsra  (Register rd, Register rt , int sa)     { emit_long(insn_RRSO((int)rt->encoding(), (int)rd->encoding(), sa, dsra_op)); }
   void dsrav (Register rd, Register rt, Register rs) { emit_long(insn_RRRO((int)rs->encoding(), (int)rt->encoding(), (int)rd->encoding(), dsrav_op)); }
   void dsra32(Register rd, Register rt , int sa)     { emit_long(insn_RRSO((int)rt->encoding(), (int)rd->encoding(), sa, dsra32_op)); }
   void dsrl  (Register rd, Register rt , int sa)     { emit_long(insn_RRSO((int)rt->encoding(), (int)rd->encoding(), sa, dsrl_op)); }
   void dsrlv (Register rd, Register rt, Register rs)  { emit_long(insn_RRRO((int)rs->encoding(), (int)rt->encoding(), (int)rd->encoding(), dsrlv_op)); }
   void dsrl32(Register rd, Register rt , int sa)     { emit_long(insn_RRSO((int)rt->encoding(), (int)rd->encoding(), sa, dsrl32_op)); }
   void dsub  (Register rd, Register rs, Register rt) { emit_long(insn_RRRO((int)rs->encoding(), (int)rt->encoding(), (int)rd->encoding(), dsub_op)); }
   void dsubu (Register rd, Register rs, Register rt) { emit_long(insn_RRRO((int)rs->encoding(), (int)rt->encoding(), (int)rd->encoding(), dsubu_op)); }
   void b(int off)       { beq(R0, R0, off); }
   void b(address entry) { b(offset(entry)); }
   void b(Label& L)      { b(target(L)); }
   void j(address entry);
   void jal(address entry);
   void jalr(Register rd, Register rs) { emit_long( ((int)rs->encoding()<<21) | ((int)rd->encoding()<<11) | jalr_op); has_delay_slot(); }
   void jalr(Register rs)              { jalr(RA, rs); }
   void jalr()                         { jalr(T9); }
   void jr(Register rs) { emit_long(((int)rs->encoding()<<21) | jr_op); has_delay_slot(); }
   void lb (Register rt, Register base, int off) { emit_long(insn_ORRI(lb_op,  (int)base->encoding(), (int)rt->encoding(), off)); }
   void lbu(Register rt, Register base, int off) { emit_long(insn_ORRI(lbu_op, (int)base->encoding(), (int)rt->encoding(), off)); }
   void ld (Register rt, Register base, int off) { emit_long(insn_ORRI(ld_op,  (int)base->encoding(), (int)rt->encoding(), off)); }
   void ldl(Register rt, Register base, int off) { emit_long(insn_ORRI(ldl_op, (int)base->encoding(), (int)rt->encoding(), off)); }
   void ldr(Register rt, Register base, int off) { emit_long(insn_ORRI(ldr_op, (int)base->encoding(), (int)rt->encoding(), off)); }
   void lh (Register rt, Register base, int off) { emit_long(insn_ORRI(lh_op,  (int)base->encoding(), (int)rt->encoding(), off)); }
   void lhu(Register rt, Register base, int off) { emit_long(insn_ORRI(lhu_op, (int)base->encoding(), (int)rt->encoding(), off)); }
   void ll (Register rt, Register base, int off) { emit_long(insn_ORRI(ll_op,  (int)base->encoding(), (int)rt->encoding(), off)); }
   void lld(Register rt, Register base, int off) { emit_long(insn_ORRI(lld_op, (int)base->encoding(), (int)rt->encoding(), off)); }
   void lui(Register rt, int imm)                { emit_long(insn_ORRI(lui_op, 0, (int)rt->encoding(), imm)); }
   void lw (Register rt, Register base, int off) { emit_long(insn_ORRI(lw_op,  (int)base->encoding(), (int)rt->encoding(), off)); }
   void lwl(Register rt, Register base, int off) { emit_long(insn_ORRI(lwl_op, (int)base->encoding(), (int)rt->encoding(), off)); }
   void lwr(Register rt, Register base, int off) { emit_long(insn_ORRI(lwr_op, (int)base->encoding(), (int)rt->encoding(), off)); }
   void lwu(Register rt, Register base, int off) { emit_long(insn_ORRI(lwu_op, (int)base->encoding(), (int)rt->encoding(), off)); }
   void lb (Register rt, Address src);
   void lbu(Register rt, Address src);
   void ld (Register rt, Address src);
   void ldl(Register rt, Address src);
   void ldr(Register rt, Address src);
   void lh (Register rt, Address src);
   void lhu(Register rt, Address src);
   void ll (Register rt, Address src);
   void lld(Register rt, Address src);
   void lw (Register rt, Address src);
   void lwl(Register rt, Address src);
   void lwr(Register rt, Address src);
   void lwu(Register rt, Address src);
   void lea(Register rt, Address src);
   void pref(int hint, Register base, int off) { emit_long(insn_ORRI(pref_op, (int)base->encoding(), low(hint, 5), low(off, 16))); }
   void mfhi (Register rd)              { emit_long( ((int)rd->encoding()<<11) | mfhi_op ); }
   void mflo (Register rd)              { emit_long( ((int)rd->encoding()<<11) | mflo_op ); }
   void mthi (Register rs)              { emit_long( ((int)rs->encoding()<<21) | mthi_op ); }
   void mtlo (Register rs)              { emit_long( ((int)rs->encoding()<<21) | mtlo_op ); }
   void mult (Register rs, Register rt) { emit_long(insn_RRRO((int)rs->encoding(), (int)rt->encoding(), 0, mult_op)); }
   void multu(Register rs, Register rt) { emit_long(insn_RRRO((int)rs->encoding(), (int)rt->encoding(), 0, multu_op)); }
   void nor(Register rd, Register rs, Register rt) { emit_long(insn_RRRO((int)rs->encoding(), (int)rt->encoding(), (int)rd->encoding(), nor_op)); }
   void orr(Register rd, Register rs, Register rt) { emit_long(insn_RRRO((int)rs->encoding(), (int)rt->encoding(), (int)rd->encoding(), or_op)); }
   void ori(Register rt, Register rs, int imm)     { emit_long(insn_ORRI(ori_op, (int)rs->encoding(), (int)rt->encoding(), imm)); }
   void sb   (Register rt, Register base, int off)     { emit_long(insn_ORRI(sb_op,    (int)base->encoding(), (int)rt->encoding(), off)); }
   void sc   (Register rt, Register base, int off)     { emit_long(insn_ORRI(sc_op,    (int)base->encoding(), (int)rt->encoding(), off)); }
   void scd  (Register rt, Register base, int off)     { emit_long(insn_ORRI(scd_op,   (int)base->encoding(), (int)rt->encoding(), off)); }
   void sd   (Register rt, Register base, int off)     { emit_long(insn_ORRI(sd_op,    (int)base->encoding(), (int)rt->encoding(), off)); }
   void sdl  (Register rt, Register base, int off)     { emit_long(insn_ORRI(sdl_op,   (int)base->encoding(), (int)rt->encoding(), off)); }
   void sdr  (Register rt, Register base, int off)     { emit_long(insn_ORRI(sdr_op,   (int)base->encoding(), (int)rt->encoding(), off)); }
   void sh   (Register rt, Register base, int off)     { emit_long(insn_ORRI(sh_op,    (int)base->encoding(), (int)rt->encoding(), off)); }
   void sll  (Register rd, Register rt ,  int sa)      { emit_long(insn_RRSO((int)rt->encoding(),  (int)rd->encoding(),   low(sa, 5),      sll_op)); }
   void sllv (Register rd, Register rt,   Register rs) { emit_long(insn_RRRO((int)rs->encoding(),  (int)rt->encoding(),   (int)rd->encoding(), sllv_op)); }
   void slt  (Register rd, Register rs,   Register rt) { emit_long(insn_RRRO((int)rs->encoding(),  (int)rt->encoding(),   (int)rd->encoding(), slt_op)); }
   void slti (Register rt, Register rs,   int imm)     { emit_long(insn_ORRI(slti_op,  (int)rs->encoding(),   (int)rt->encoding(), imm)); }
   void sltiu(Register rt, Register rs,   int imm)     { emit_long(insn_ORRI(sltiu_op, (int)rs->encoding(),   (int)rt->encoding(), imm)); }
   void sltu (Register rd, Register rs,   Register rt) { emit_long(insn_RRRO((int)rs->encoding(),  (int)rt->encoding(),   (int)rd->encoding(), sltu_op)); }
   void sra  (Register rd, Register rt ,  int sa)      { emit_long(insn_RRSO((int)rt->encoding(),  (int)rd->encoding(),   sa,      sra_op)); }
   void srav (Register rd, Register rt,   Register rs) { emit_long(insn_RRRO((int)rs->encoding(),  (int)rt->encoding(),   (int)rd->encoding(), srav_op)); }
   void srl  (Register rd, Register rt ,  int sa)      { emit_long(insn_RRSO((int)rt->encoding(),  (int)rd->encoding(),   low(sa, 5),      srl_op)); }
   void srlv (Register rd, Register rt,   Register rs) { emit_long(insn_RRRO((int)rs->encoding(),  (int)rt->encoding(),   (int)rd->encoding(), srlv_op)); }
 #ifndef _LP64
   void sub  (Register rd, Register rs,   Register rt) { emit_long(insn_RRRO((int)rs->encoding(),  (int)rt->encoding(),   (int)rd->encoding(), sub_op)); }
   void subu (Register rd, Register rs,   Register rt) { emit_long(insn_RRRO((int)rs->encoding(),  (int)rt->encoding(),   (int)rd->encoding(), subu_op)); }
 #else
   void sub  (Register rd, Register rs,   Register rt) { dsub  (rd, rs, rt); }
   void subu (Register rd, Register rs,   Register rt) { dsubu (rd, rs, rt); }
   void subu32 (Register rd, Register rs,   Register rt) { emit_long(insn_RRRO((int)rs->encoding(),  (int)rt->encoding(),   (int)rd->encoding(), subu_op)); }
 #endif
   void sw   (Register rt, Register base, int off)     { emit_long(insn_ORRI(sw_op,    (int)base->encoding(), (int)rt->encoding(), off)); }
   void swl  (Register rt, Register base, int off)     { emit_long(insn_ORRI(swl_op,   (int)base->encoding(), (int)rt->encoding(), off)); }
   void swr  (Register rt, Register base, int off)     { emit_long(insn_ORRI(swr_op,   (int)base->encoding(), (int)rt->encoding(), off)); }
   void sync ()                                        { emit_long(sync_op); }
   void syscall(int code)                              { emit_long( (code<<6) | syscall_op ); }
   void sb(Register rt, Address dst);
   void sc(Register rt, Address dst);
   void scd(Register rt, Address dst);
   void sd(Register rt, Address dst);
   void sdl(Register rt, Address dst);
   void sdr(Register rt, Address dst);
   void sh(Register rt, Address dst);
   void sw(Register rt, Address dst);
   void swl(Register rt, Address dst);
   void swr(Register rt, Address dst);
   void teq  (Register rs, Register rt, int code) { emit_long(insn_RRCO((int)rs->encoding(),   (int)rt->encoding(), code, teq_op)); }
   void teqi (Register rs, int imm)               { emit_long(insn_ORRI(regimm_op, (int)rs->encoding(), teqi_op, imm)); }
   void tge  (Register rs, Register rt, int code) { emit_long(insn_RRCO((int)rs->encoding(),   (int)rt->encoding(), code, tge_op)); }
   void tgei (Register rs, int imm)               { emit_long(insn_ORRI(regimm_op, (int)rs->encoding(), tgei_op, imm)); }
   void tgeiu(Register rs, int imm)               { emit_long(insn_ORRI(regimm_op, (int)rs->encoding(), tgeiu_op, imm)); }
   void tgeu (Register rs, Register rt, int code) { emit_long(insn_RRCO((int)rs->encoding(),   (int)rt->encoding(), code, tgeu_op)); }
   void tlt  (Register rs, Register rt, int code) { emit_long(insn_RRCO((int)rs->encoding(),   (int)rt->encoding(), code, tlt_op)); }
   void tlti (Register rs, int imm)               { emit_long(insn_ORRI(regimm_op, (int)rs->encoding(), tlti_op, imm)); }
   void tltiu(Register rs, int imm)               { emit_long(insn_ORRI(regimm_op, (int)rs->encoding(), tltiu_op, imm)); }
   void tltu (Register rs, Register rt, int code) { emit_long(insn_RRCO((int)rs->encoding(),   (int)rt->encoding(), code, tltu_op)); }
   void tne  (Register rs, Register rt, int code) { emit_long(insn_RRCO((int)rs->encoding(),   (int)rt->encoding(), code, tne_op)); }
   void tnei (Register rs, int imm)               { emit_long(insn_ORRI(regimm_op, (int)rs->encoding(), tnei_op, imm)); }
   void xorr(Register rd, Register rs, Register rt) { emit_long(insn_RRRO((int)rs->encoding(), (int)rt->encoding(), (int)rd->encoding(), xor_op)); }
   void xori(Register rt, Register rs, int imm) { emit_long(insn_ORRI(xori_op, (int)rs->encoding(), (int)rt->encoding(), imm)); }
   void nop()               { emit_long(0); }
   void ldc1(FloatRegister ft, Register base, int off) { emit_long(insn_ORRI(ldc1_op, (int)base->encoding(), (int)ft->encoding(), off)); }
   void lwc1(FloatRegister ft, Register base, int off) { emit_long(insn_ORRI(lwc1_op, (int)base->encoding(), (int)ft->encoding(), off)); }
   void ldc1(FloatRegister ft, Address src);
   void lwc1(FloatRegister ft, Address src);
   //COP0
   void mfc0  (Register rt, Register rd)       { emit_long(insn_COP0( mfc0_op, (int)rt->encoding(), (int)rd->encoding())); }
   void dmfc0 (Register rt, FloatRegister rd)  { emit_long(insn_COP0(dmfc0_op, (int)rt->encoding(), (int)rd->encoding())); }
   // MFGC0, DMFGC0, MTGC0, DMTGC0 not implemented yet
   void mtc0  (Register rt, Register rd)       { emit_long(insn_COP0( mtc0_op, (int)rt->encoding(), (int)rd->encoding())); }
   void dmtc0 (Register rt, FloatRegister rd)  { emit_long(insn_COP0(dmtc0_op, (int)rt->encoding(), (int)rd->encoding())); }
   //COP0 end
   //COP1
   void mfc1 (Register rt, FloatRegister fs) { emit_long(insn_COP1 (mfc1_op, (int)rt->encoding(), (int)fs->encoding())); }
   void dmfc1(Register rt, FloatRegister fs) { emit_long(insn_COP1(dmfc1_op, (int)rt->encoding(), (int)fs->encoding())); }
   void cfc1 (Register rt, int fs)           { emit_long(insn_COP1( cfc1_op, (int)rt->encoding(), fs)); }
   void mfhc1(Register rt, int fs)           { emit_long(insn_COP1(mfhc1_op, (int)rt->encoding(), fs)); }
   void mtc1 (Register rt, FloatRegister fs) { emit_long(insn_COP1( mtc1_op, (int)rt->encoding(), (int)fs->encoding())); }
   void dmtc1(Register rt, FloatRegister fs) { emit_long(insn_COP1(dmtc1_op, (int)rt->encoding(), (int)fs->encoding())); }
   void ctc1 (Register rt, FloatRegister fs) { emit_long(insn_COP1( ctc1_op, (int)rt->encoding(), (int)fs->encoding())); }
   void ctc1 (Register rt, int fs)           { emit_long(insn_COP1(ctc1_op,  (int)rt->encoding(), fs)); }
   void mthc1(Register rt, int fs)           { emit_long(insn_COP1(mthc1_op, (int)rt->encoding(), fs)); }
   void bc1f (int off) { emit_long(insn_ORRI(cop1_op, bc1f_op, bcf_op, off)); has_delay_slot(); }
   void bc1fl(int off) { emit_long(insn_ORRI(cop1_op, bc1f_op, bcfl_op, off)); has_delay_slot(); }
   void bc1t (int off) { emit_long(insn_ORRI(cop1_op, bc1f_op, bct_op, off)); has_delay_slot(); }
   void bc1tl(int off) { emit_long(insn_ORRI(cop1_op, bc1f_op, bctl_op, off));  has_delay_slot(); }
   void bc1f (address entry) { bc1f(offset(entry)); }
   void bc1fl(address entry) { bc1fl(offset(entry)); }
   void bc1t (address entry) { bc1t(offset(entry)); }
   void bc1tl(address entry) { bc1tl(offset(entry)); }
   void bc1f (Label& L) { bc1f(target(L)); }
   void bc1fl(Label& L) { bc1fl(target(L)); }
   void bc1t (Label& L) { bc1t(target(L)); }
   void bc1tl(Label& L) { bc1tl(target(L)); }
 //R0->encoding() is 0; INSN_SINGLE is enclosed by {} for ctags.
 #define INSN_SINGLE(r1, r2, r3, op)   \
   { emit_long(insn_F3RO(single_fmt, (int)r1->encoding(), (int)r2->encoding(), (int)r3->encoding(), op));}
   void add_s    (FloatRegister fd, FloatRegister fs, FloatRegister ft) {INSN_SINGLE(ft, fs, fd, fadd_op)}
   void sub_s    (FloatRegister fd, FloatRegister fs, FloatRegister ft) {INSN_SINGLE(ft, fs, fd, fsub_op)}
   void mul_s    (FloatRegister fd, FloatRegister fs, FloatRegister ft) {INSN_SINGLE(ft, fs, fd, fmul_op)}
   void div_s    (FloatRegister fd, FloatRegister fs, FloatRegister ft) {INSN_SINGLE(ft, fs, fd, fdiv_op)}
   void sqrt_s   (FloatRegister fd, FloatRegister fs) {INSN_SINGLE(R0, fs, fd, fsqrt_op)}
   void abs_s    (FloatRegister fd, FloatRegister fs) {INSN_SINGLE(R0, fs, fd, fabs_op)}
   void mov_s    (FloatRegister fd, FloatRegister fs) {INSN_SINGLE(R0, fs, fd, fmov_op)}
   void neg_s    (FloatRegister fd, FloatRegister fs) {INSN_SINGLE(R0, fs, fd, fneg_op)}
   void round_l_s(FloatRegister fd, FloatRegister fs) {INSN_SINGLE(R0, fs, fd, froundl_op)}
   void trunc_l_s(FloatRegister fd, FloatRegister fs) {INSN_SINGLE(R0, fs, fd, ftruncl_op)}
   void ceil_l_s (FloatRegister fd, FloatRegister fs) {INSN_SINGLE(R0, fs, fd, fceill_op)}
   void floor_l_s(FloatRegister fd, FloatRegister fs) {INSN_SINGLE(R0, fs, fd, ffloorl_op)}
   void round_w_s(FloatRegister fd, FloatRegister fs) {INSN_SINGLE(R0, fs, fd, froundw_op)}
   void trunc_w_s(FloatRegister fd, FloatRegister fs) {INSN_SINGLE(R0, fs, fd, ftruncw_op)}
   void ceil_w_s (FloatRegister fd, FloatRegister fs) {INSN_SINGLE(R0, fs, fd, fceilw_op)}
   void floor_w_s(FloatRegister fd, FloatRegister fs) {INSN_SINGLE(R0, fs, fd, ffloorw_op)}
   //null
   //void movf_s(FloatRegister rd, FloatRegister rs, FPConditionCode cc) { unimplemented(" movf_s")}
   //void movt_s(FloatRegister rd, FloatRegister rs, FPConditionCode cc) { unimplemented(" movt_s") }
   void movz_s  (FloatRegister fd, FloatRegister fs, Register rt) {INSN_SINGLE(rt, fs, fd, movz_f_op)}
   void movn_s  (FloatRegister fd, FloatRegister fs, Register rt) {INSN_SINGLE(rt, fs, fd, movn_f_op)}
   //null
   void recip_s (FloatRegister fd, FloatRegister fs) {INSN_SINGLE(R0, fs, fd, frecip_op)}
   void rsqrt_s (FloatRegister fd, FloatRegister fs) {INSN_SINGLE(R0, fs, fd, frsqrt_op)}
   //null
   void cvt_d_s (FloatRegister fd, FloatRegister fs) {INSN_SINGLE(R0, fs, fd, fcvtd_op)}
   //null
   void cvt_w_s (FloatRegister fd, FloatRegister fs) {INSN_SINGLE(R0, fs, fd, fcvtw_op)}
   void cvt_l_s (FloatRegister fd, FloatRegister fs) {INSN_SINGLE(R0, fs, fd, fcvtl_op)}
   void cvt_ps_s(FloatRegister fd, FloatRegister fs, FloatRegister ft) {INSN_SINGLE(ft, fs, fd, fcvtps_op)}
   //null
   void c_f_s   (FloatRegister fs, FloatRegister ft) {INSN_SINGLE(ft, fs, R0, f_cond)}
   void c_un_s  (FloatRegister fs, FloatRegister ft) {INSN_SINGLE(ft, fs, R0, un_cond)}
   void c_eq_s  (FloatRegister fs, FloatRegister ft) {INSN_SINGLE(ft, fs, R0, eq_cond)}
   void c_ueq_s (FloatRegister fs, FloatRegister ft) {INSN_SINGLE(ft, fs, R0, ueq_cond)}
   void c_olt_s (FloatRegister fs, FloatRegister ft) {INSN_SINGLE(ft, fs, R0, olt_cond)}
   void c_ult_s (FloatRegister fs, FloatRegister ft) {INSN_SINGLE(ft, fs, R0, ult_cond)}
   void c_ole_s (FloatRegister fs, FloatRegister ft) {INSN_SINGLE(ft, fs, R0, ole_cond)}
   void c_ule_s (FloatRegister fs, FloatRegister ft) {INSN_SINGLE(ft, fs, R0, ule_cond)}
   void c_sf_s  (FloatRegister fs, FloatRegister ft) {INSN_SINGLE(ft, fs, R0, sf_cond)}
   void c_ngle_s(FloatRegister fs, FloatRegister ft) {INSN_SINGLE(ft, fs, R0, ngle_cond)}
   void c_seq_s (FloatRegister fs, FloatRegister ft) {INSN_SINGLE(ft, fs, R0, seq_cond)}
   void c_ngl_s (FloatRegister fs, FloatRegister ft) {INSN_SINGLE(ft, fs, R0, ngl_cond)}
   void c_lt_s  (FloatRegister fs, FloatRegister ft) {INSN_SINGLE(ft, fs, R0, lt_cond)}
   void c_nge_s (FloatRegister fs, FloatRegister ft) {INSN_SINGLE(ft, fs, R0, nge_cond)}
   void c_le_s  (FloatRegister fs, FloatRegister ft) {INSN_SINGLE(ft, fs, R0, le_cond)}
   void c_ngt_s (FloatRegister fs, FloatRegister ft) {INSN_SINGLE(ft, fs, R0, ngt_cond)}
 #undef INSN_SINGLE
 //R0->encoding() is 0; INSN_DOUBLE is enclosed by {} for ctags.
 #define INSN_DOUBLE(r1, r2, r3, op)   \
   { emit_long(insn_F3RO(double_fmt, (int)r1->encoding(), (int)r2->encoding(), (int)r3->encoding(), op));}
   void add_d    (FloatRegister fd, FloatRegister fs, FloatRegister ft) {INSN_DOUBLE(ft, fs, fd, fadd_op)}
   void sub_d    (FloatRegister fd, FloatRegister fs, FloatRegister ft) {INSN_DOUBLE(ft, fs, fd, fsub_op)}
   void mul_d    (FloatRegister fd, FloatRegister fs, FloatRegister ft) {INSN_DOUBLE(ft, fs, fd, fmul_op)}
   void div_d    (FloatRegister fd, FloatRegister fs, FloatRegister ft) {INSN_DOUBLE(ft, fs, fd, fdiv_op)}
   void sqrt_d   (FloatRegister fd, FloatRegister fs) {INSN_DOUBLE(R0, fs, fd, fsqrt_op)}
   void abs_d    (FloatRegister fd, FloatRegister fs) {INSN_DOUBLE(R0, fs, fd, fabs_op)}
   void mov_d    (FloatRegister fd, FloatRegister fs) {INSN_DOUBLE(R0, fs, fd, fmov_op)}
   void neg_d    (FloatRegister fd, FloatRegister fs) {INSN_DOUBLE(R0, fs, fd, fneg_op)}
   void round_l_d(FloatRegister fd, FloatRegister fs) {INSN_DOUBLE(R0, fs, fd, froundl_op)}
   void trunc_l_d(FloatRegister fd, FloatRegister fs) {INSN_DOUBLE(R0, fs, fd, ftruncl_op)}
   void ceil_l_d (FloatRegister fd, FloatRegister fs) {INSN_DOUBLE(R0, fs, fd, fceill_op)}
   void floor_l_d(FloatRegister fd, FloatRegister fs) {INSN_DOUBLE(R0, fs, fd, ffloorl_op)}
   void round_w_d(FloatRegister fd, FloatRegister fs) {INSN_DOUBLE(R0, fs, fd, froundw_op)}
   void trunc_w_d(FloatRegister fd, FloatRegister fs) {INSN_DOUBLE(R0, fs, fd, ftruncw_op)}
   void ceil_w_d (FloatRegister fd, FloatRegister fs) {INSN_DOUBLE(R0, fs, fd, fceilw_op)}
   void floor_w_d(FloatRegister fd, FloatRegister fs) {INSN_DOUBLE(R0, fs, fd, ffloorw_op)}
   //null
   //void movf_d(Register rd, Register rs, FPConditionCode cc) { unimplemented(" movf_d")}
   //void movt_d(Register rd, Register rs, FPConditionCode cc) { unimplemented(" movt_d") }
   void movz_d  (FloatRegister fd, FloatRegister fs, Register rt) {INSN_DOUBLE(rt, fs, fd, movz_f_op)}
   void movn_d  (FloatRegister fd, FloatRegister fs, Register rt) {INSN_DOUBLE(rt, fs, fd, movn_f_op)}
   //null
   void recip_d (FloatRegister fd, FloatRegister fs) {INSN_DOUBLE(R0, fs, fd, frecip_op)}
   void rsqrt_d (FloatRegister fd, FloatRegister fs) {INSN_DOUBLE(R0, fs, fd, frsqrt_op)}
   //null
   void cvt_s_d (FloatRegister fd, FloatRegister fs) {INSN_DOUBLE(R0, fs, fd, fcvts_op)}
   void cvt_l_d (FloatRegister fd, FloatRegister fs) {INSN_DOUBLE(R0, fs, fd, fcvtl_op)}
   //null
   void cvt_w_d (FloatRegister fd, FloatRegister fs) {INSN_DOUBLE(R0, fs, fd, fcvtw_op)}
   //null
   void c_f_d   (FloatRegister fs, FloatRegister ft) {INSN_DOUBLE(ft, fs, R0, f_cond)}
   void c_un_d  (FloatRegister fs, FloatRegister ft) {INSN_DOUBLE(ft, fs, R0, un_cond)}
   void c_eq_d  (FloatRegister fs, FloatRegister ft) {INSN_DOUBLE(ft, fs, R0, eq_cond)}
   void c_ueq_d (FloatRegister fs, FloatRegister ft) {INSN_DOUBLE(ft, fs, R0, ueq_cond)}
   void c_olt_d (FloatRegister fs, FloatRegister ft) {INSN_DOUBLE(ft, fs, R0, olt_cond)}
   void c_ult_d (FloatRegister fs, FloatRegister ft) {INSN_DOUBLE(ft, fs, R0, ult_cond)}
   void c_ole_d (FloatRegister fs, FloatRegister ft) {INSN_DOUBLE(ft, fs, R0, ole_cond)}
   void c_ule_d (FloatRegister fs, FloatRegister ft) {INSN_DOUBLE(ft, fs, R0, ule_cond)}
   void c_sf_d  (FloatRegister fs, FloatRegister ft) {INSN_DOUBLE(ft, fs, R0, sf_cond)}
   void c_ngle_d(FloatRegister fs, FloatRegister ft) {INSN_DOUBLE(ft, fs, R0, ngle_cond)}
   void c_seq_d (FloatRegister fs, FloatRegister ft) {INSN_DOUBLE(ft, fs, R0, seq_cond)}
   void c_ngl_d (FloatRegister fs, FloatRegister ft) {INSN_DOUBLE(ft, fs, R0, ngl_cond)}
   void c_lt_d  (FloatRegister fs, FloatRegister ft) {INSN_DOUBLE(ft, fs, R0, lt_cond)}
   void c_nge_d (FloatRegister fs, FloatRegister ft) {INSN_DOUBLE(ft, fs, R0, nge_cond)}
   void c_le_d  (FloatRegister fs, FloatRegister ft) {INSN_DOUBLE(ft, fs, R0, le_cond)}
   void c_ngt_d (FloatRegister fs, FloatRegister ft) {INSN_DOUBLE(ft, fs, R0, ngt_cond)}
 #undef INSN_DOUBLE
   //null
   void cvt_s_w(FloatRegister fd, FloatRegister fs) { emit_long(insn_F3RO(word_fmt, 0, (int)fs->encoding(), (int)fd->encoding(), fcvts_op)); }
   void cvt_d_w(FloatRegister fd, FloatRegister fs) { emit_long(insn_F3RO(word_fmt, 0, (int)fs->encoding(), (int)fd->encoding(), fcvtd_op)); }
   //null
   void cvt_s_l(FloatRegister fd, FloatRegister fs) { emit_long(insn_F3RO(long_fmt, 0, (int)fs->encoding(), (int)fd->encoding(), fcvts_op)); }
   void cvt_d_l(FloatRegister fd, FloatRegister fs) { emit_long(insn_F3RO(long_fmt, 0, (int)fs->encoding(), (int)fd->encoding(), fcvtd_op)); }
   //null
 //R0->encoding() is 0; INSN_PS is enclosed by {} for ctags.
 #define INSN_PS(r1, r2, r3, op)   \
   { emit_long(insn_F3RO(ps_fmt, (int)r1->encoding(), (int)r2->encoding(), (int)r3->encoding(), op));}
   void add_ps (FloatRegister fd, FloatRegister fs, FloatRegister ft) {INSN_PS(ft, fs, fd, fadd_op)}
   void sub_ps (FloatRegister fd, FloatRegister fs, FloatRegister ft) {INSN_PS(ft, fs, fd, fsub_op)}
   void mul_ps (FloatRegister fd, FloatRegister fs, FloatRegister ft) {INSN_PS(ft, fs, fd, fmul_op)}
   //null
   void abs_ps (FloatRegister fd, FloatRegister fs) {INSN_PS(R0, fs, fd, fabs_op)}
   void mov_ps (FloatRegister fd, FloatRegister fs) {INSN_PS(R0, fs, fd, fmov_op)}
   void neg_ps (FloatRegister fd, FloatRegister fs) {INSN_PS(R0, fs, fd, fneg_op)}
   //null
   //void movf_ps(FloatRegister rd, FloatRegister rs, FPConditionCode cc) { unimplemented(" movf_ps")}
   //void movt_ps(FloatRegister rd, FloatRegister rs, FPConditionCode cc) { unimplemented(" movt_ps") }
   void movz_ps  (FloatRegister fd, FloatRegister fs, Register rt) {INSN_PS(rt, fs, fd, movz_f_op)}
   void movn_ps  (FloatRegister fd, FloatRegister fs, Register rt) {INSN_PS(rt, fs, fd, movn_f_op)}
   //null
   void cvt_s_pu (FloatRegister fd, FloatRegister fs) {INSN_PS(R0, fs, fd, fcvts_op)}
   //null
   void cvt_s_pl (FloatRegister fd, FloatRegister fs) {INSN_PS(R0, fs, fd, fcvtspl_op)}
   //null
   void pll_ps   (FloatRegister fd, FloatRegister fs, FloatRegister ft) {INSN_PS(ft, fs, fd, fpll_op)}
   void plu_ps   (FloatRegister fd, FloatRegister fs, FloatRegister ft) {INSN_PS(ft, fs, fd, fplu_op)}
   void pul_ps   (FloatRegister fd, FloatRegister fs, FloatRegister ft) {INSN_PS(ft, fs, fd, fpul_op)}
   void puu_ps   (FloatRegister fd, FloatRegister fs, FloatRegister ft) {INSN_PS(ft, fs, fd, fpuu_op)}
   void c_f_ps   (FloatRegister fs, FloatRegister ft) {INSN_PS(ft, fs, R0, f_cond)}
   void c_un_ps  (FloatRegister fs, FloatRegister ft) {INSN_PS(ft, fs, R0, un_cond)}
   void c_eq_ps  (FloatRegister fs, FloatRegister ft) {INSN_PS(ft, fs, R0, eq_cond)}
   void c_ueq_ps (FloatRegister fs, FloatRegister ft) {INSN_PS(ft, fs, R0, ueq_cond)}
   void c_olt_ps (FloatRegister fs, FloatRegister ft) {INSN_PS(ft, fs, R0, olt_cond)}
   void c_ult_ps (FloatRegister fs, FloatRegister ft) {INSN_PS(ft, fs, R0, ult_cond)}
   void c_ole_ps (FloatRegister fs, FloatRegister ft) {INSN_PS(ft, fs, R0, ole_cond)}
   void c_ule_ps (FloatRegister fs, FloatRegister ft) {INSN_PS(ft, fs, R0, ule_cond)}
   void c_sf_ps  (FloatRegister fs, FloatRegister ft) {INSN_PS(ft, fs, R0, sf_cond)}
   void c_ngle_ps(FloatRegister fs, FloatRegister ft) {INSN_PS(ft, fs, R0, ngle_cond)}
   void c_seq_ps (FloatRegister fs, FloatRegister ft) {INSN_PS(ft, fs, R0, seq_cond)}
   void c_ngl_ps (FloatRegister fs, FloatRegister ft) {INSN_PS(ft, fs, R0, ngl_cond)}
   void c_lt_ps  (FloatRegister fs, FloatRegister ft) {INSN_PS(ft, fs, R0, lt_cond)}
   void c_nge_ps (FloatRegister fs, FloatRegister ft) {INSN_PS(ft, fs, R0, nge_cond)}
   void c_le_ps  (FloatRegister fs, FloatRegister ft) {INSN_PS(ft, fs, R0, le_cond)}
   void c_ngt_ps (FloatRegister fs, FloatRegister ft) {INSN_PS(ft, fs, R0, ngt_cond)}
   //null
 #undef INSN_PS
   //COP1 end
   //COP1X
 //R0->encoding() is 0; INSN_SINGLE is enclosed by {} for ctags.
 #define INSN_COP1X(r0, r1, r2, r3, op)   \
   { emit_long(insn_F3ROX((int)r0->encoding(), (int)r1->encoding(), (int)r2->encoding(), (int)r3->encoding(), op));}
   void madd_s(FloatRegister fd, FloatRegister fr, FloatRegister fs, FloatRegister ft) {INSN_COP1X(fr, ft, fs, fd, madd_s_op) }
   void madd_d(FloatRegister fd, FloatRegister fr, FloatRegister fs, FloatRegister ft) {INSN_COP1X(fr, ft, fs, fd, madd_d_op) }
   void madd_ps(FloatRegister fd, FloatRegister fr, FloatRegister fs, FloatRegister ft){INSN_COP1X(fr, ft, fs, fd, madd_ps_op) }
   void msub_s(FloatRegister fd, FloatRegister fr, FloatRegister fs, FloatRegister ft) {INSN_COP1X(fr, ft, fs, fd, msub_s_op) }
   void msub_d(FloatRegister fd, FloatRegister fr, FloatRegister fs, FloatRegister ft) {INSN_COP1X(fr, ft, fs, fd, msub_d_op) }
   void msub_ps(FloatRegister fd, FloatRegister fr, FloatRegister fs, FloatRegister ft){INSN_COP1X(fr, ft, fs, fd, msub_ps_op) }
   void nmadd_s(FloatRegister fd, FloatRegister fr, FloatRegister fs, FloatRegister ft) {INSN_COP1X(fr, ft, fs, fd, nmadd_s_op) }
   void nmadd_d(FloatRegister fd, FloatRegister fr, FloatRegister fs, FloatRegister ft) {INSN_COP1X(fr, ft, fs, fd, nmadd_d_op) }
   void nmadd_ps(FloatRegister fd, FloatRegister fr, FloatRegister fs, FloatRegister ft){INSN_COP1X(fr, ft, fs, fd, nmadd_ps_op) }
   void nmsub_s(FloatRegister fd, FloatRegister fr, FloatRegister fs, FloatRegister ft) {INSN_COP1X(fr, ft, fs, fd, nmsub_s_op) }
   void nmsub_d(FloatRegister fd, FloatRegister fr, FloatRegister fs, FloatRegister ft) {INSN_COP1X(fr, ft, fs, fd, nmsub_d_op) }
   void nmsub_ps(FloatRegister fd, FloatRegister fr, FloatRegister fs, FloatRegister ft){INSN_COP1X(fr, ft, fs, fd, nmsub_ps_op) }
 #undef INSN_COP1X
   //COP1X end
   //SPECIAL2
 //R0->encoding() is 0; INSN_PS is enclosed by {} for ctags.
 #define INSN_S2(op)   \
   { emit_long((special2_op << 26) | ((int)rs->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)rd->encoding() << 11) | op);}
   void madd    (Register rs, Register rt) { emit_long((special2_op << 26) | ((int)rs->encoding() << 21) | ((int)rt->encoding() << 16) | madd_op); }
   void maddu   (Register rs, Register rt) { emit_long((special2_op << 26) | ((int)rs->encoding() << 21) | ((int)rt->encoding() << 16) | maddu_op); }
   void mul     (Register rd, Register rs, Register rt) { INSN_S2(mul_op)     }
   void gsandn  (Register rd, Register rs, Register rt) { INSN_S2((0x12 << 6) | gs0x03_op) }
   void msub    (Register rs, Register rt) { emit_long((special2_op << 26) | ((int)rs->encoding() << 21) | ((int)rt->encoding() << 16) | msub_op); }
   void msubu   (Register rs, Register rt) { emit_long((special2_op << 26) | ((int)rs->encoding() << 21) | ((int)rt->encoding() << 16) | msubu_op); }
   void gsorn   (Register rd, Register rs, Register rt) { INSN_S2((0x12 << 6) | gs0x06_op) }
   void gsmult  (Register rd, Register rs, Register rt) { INSN_S2(gsmult_op)  }
   void gsdmult (Register rd, Register rs, Register rt) { INSN_S2(gsdmult_op) }
   void gsmultu (Register rd, Register rs, Register rt) { INSN_S2(gsmultu_op) }
   void gsdmultu(Register rd, Register rs, Register rt) { INSN_S2(gsdmultu_op)}
   void gsdiv   (Register rd, Register rs, Register rt) { INSN_S2(gsdiv_op)   }
   void gsddiv  (Register rd, Register rs, Register rt) { INSN_S2(gsddiv_op)  }
   void gsdivu  (Register rd, Register rs, Register rt) { INSN_S2(gsdivu_op)  }
   void gsddivu (Register rd, Register rs, Register rt) { INSN_S2(gsddivu_op) }
   void gsmod   (Register rd, Register rs, Register rt) { INSN_S2(gsmod_op)   }
   void gsdmod  (Register rd, Register rs, Register rt) { INSN_S2(gsdmod_op)  }
   void gsmodu  (Register rd, Register rs, Register rt) { INSN_S2(gsmodu_op)  }
   void gsdmodu (Register rd, Register rs, Register rt) { INSN_S2(gsdmodu_op) }
   void clz (Register rd, Register rs) { emit_long((special2_op << 26) | ((int)rs->encoding() << 21) | ((int)rd->encoding() << 16) | ((int)rd->encoding() << 11) | clz_op); }
   void clo (Register rd, Register rs) { emit_long((special2_op << 26) | ((int)rs->encoding() << 21) | ((int)rd->encoding() << 16) | ((int)rd->encoding() << 11) | clo_op); }
   void ctz (Register rd, Register rs) { emit_long((special2_op << 26) | ((int)rs->encoding() << 21) | ((int)rd->encoding() << 16) | ((int)rd->encoding() << 11) | 0 << 6| xctx_op); }
   void cto (Register rd, Register rs) { emit_long((special2_op << 26) | ((int)rs->encoding() << 21) | ((int)rd->encoding() << 16) | ((int)rd->encoding() << 11) | 1 << 6| xctx_op); }
   void dctz(Register rd, Register rs) { emit_long((special2_op << 26) | ((int)rs->encoding() << 21) | ((int)rd->encoding() << 16) | ((int)rd->encoding() << 11) | 2 << 6| xctx_op); }
   void dcto(Register rd, Register rs) { emit_long((special2_op << 26) | ((int)rs->encoding() << 21) | ((int)rd->encoding() << 16) | ((int)rd->encoding() << 11) | 3 << 6| xctx_op); }
   void dclz(Register rd, Register rs) { emit_long((special2_op << 26) | ((int)rs->encoding() << 21) | ((int)rd->encoding() << 16) | ((int)rd->encoding() << 11) | dclz_op); }
   void dclo(Register rd, Register rs) { emit_long((special2_op << 26) | ((int)rs->encoding() << 21) | ((int)rd->encoding() << 16) | ((int)rd->encoding() << 11) | dclo_op); }
 #undef INSN_S2
   //SPECIAL3
 /*
 // FIXME
 #define is_0_to_32(a, b) \
   assert (a >= 0, " just a check"); \
   assert (a <= 0, " just a check"); \
   assert (b >= 0, " just a check"); \
   assert (b <= 0, " just a check"); \
   assert (a+b >= 0, " just a check"); \
   assert (a+b <= 0, " just a check");
   */
 #define is_0_to_32(a, b)
   void ins  (Register rt, Register rs, int pos, int size) { is_0_to_32(pos, size); emit_long((special3_op << 26) | ((int)rs->encoding() << 21) | ((int)rt->encoding() << 16) | (low(pos+size-1, 5) << 11) | (low(pos, 5) << 6) | ins_op); }
   void dinsm(Register rt, Register rs, int pos, int size) { is_0_to_32(pos, size); emit_long((special3_op << 26) | ((int)rs->encoding() << 21) | ((int)rt->encoding() << 16) | (low(pos+size-33, 5) << 11) | (low(pos, 5) << 6) | dinsm_op); }
   void dinsu(Register rt, Register rs, int pos, int size) { is_0_to_32(pos, size); emit_long((special3_op << 26) | ((int)rs->encoding() << 21) | ((int)rt->encoding() << 16) | (low(pos+size-33, 5) << 11) | (low(pos-32, 5) << 6) | dinsu_op); }
   void dins (Register rt, Register rs, int pos, int size) {
      guarantee((0 <= pos) && (pos < 32), "pos must be in [0, 32)");
      guarantee((0 < size) && (size <= 32), "size must be in (0, 32]");
      guarantee((0 < pos + size) && (pos + size <= 32), "pos + size must be in (0, 32]");
      emit_long((special3_op << 26) | ((int)rs->encoding() << 21) | ((int)rt->encoding() << 16) | (low(pos+size-1, 5) << 11) | (low(pos, 5) << 6) | dins_op);
   }
   void repl_qb (Register rd, int const8)  { emit_long((special3_op << 26) | (low(const8, 8) << 16)      | ((int)rd->encoding() << 11) | repl_qb_op  << 6 | re1_op); }
   void replv_qb(Register rd, Register rt) { emit_long((special3_op << 26) | ((int)rt->encoding() << 16) | ((int)rd->encoding() << 11) | replv_qb_op << 6 | re1_op ); }
   void repl_ph (Register rd, int const10) { emit_long((special3_op << 26) | (low(const10, 10) << 16)    | ((int)rd->encoding() << 11) | repl_ph_op  << 6 | re1_op); }
   void replv_ph(Register rd, Register rt) { emit_long((special3_op << 26) | ((int)rt->encoding() << 16) | ((int)rd->encoding() << 11) | replv_ph_op << 6 | re1_op ); }
   void repl_ob (Register rd, int const8)  { emit_long((special3_op << 26) | (low(const8, 8) << 16)      | ((int)rd->encoding() << 11) | repl_ob_op  << 6 | re2_op); }
   void replv_ob(Register rd, Register rt) { emit_long((special3_op << 26) | ((int)rt->encoding() << 16) | ((int)rd->encoding() << 11) | replv_ob_op << 6 | re2_op ); }
   void repl_qh (Register rd, int const10)  { emit_long((special3_op << 26) | (low(const10, 10) << 16)      | ((int)rd->encoding() << 11) | repl_qh_op  << 6 | re2_op); }
   void replv_qh(Register rd, Register rt) { emit_long((special3_op << 26) | ((int)rt->encoding() << 16) | ((int)rd->encoding() << 11) | replv_qh_op << 6 | re2_op ); }
   void repl_pw (Register rd, int const10) { emit_long((special3_op << 26) | (low(const10, 10) << 16)    | ((int)rd->encoding() << 11) | repl_pw_op  << 6 | re2_op); }
   void replv_pw(Register rd, Register rt) { emit_long((special3_op << 26) | ((int)rt->encoding() << 16) | ((int)rd->encoding() << 11) | replv_pw_op << 6 | re2_op ); }
   void sdc1(FloatRegister ft, Register base, int off) { emit_long(insn_ORRI(sdc1_op, (int)base->encoding(), (int)ft->encoding(), off)); }
   void sdc1(FloatRegister ft, Address dst);
   void swc1(FloatRegister ft, Register base, int off) { emit_long(insn_ORRI(swc1_op, (int)base->encoding(), (int)ft->encoding(), off)); }
   void swc1(FloatRegister ft, Address dst);
   void int3();
   static void print_instruction(int);
   int patched_branch(int dest_pos, int inst, int inst_pos);
   int branch_destination(int inst, int pos);
   /* Godson3 extension */
   // gssq/gslq/gssqc1/gslqc1: vAddr = sign_extend(offset << 4 ) + GPR[base]. Therefore, the off should be ">> 4".
   void gslble(Register rt, Register base, Register bound) {
     emit_long((gs_lwc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)bound->encoding() << 11) | 0 << 6 | gslble_op);
   }
   void gslbgt(Register rt, Register base, Register bound) {
     emit_long((gs_lwc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)bound->encoding() << 11) | 0 << 6 | gslbgt_op);
   }
   void gslhle(Register rt, Register base, Register bound) {
     emit_long((gs_lwc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)bound->encoding() << 11) | 0 << 6 | gslhle_op);
   }
   void gslhgt(Register rt, Register base, Register bound) {
     emit_long((gs_lwc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)bound->encoding() << 11) | 0 << 6 | gslhgt_op);
   }
   void gslwle(Register rt, Register base, Register bound) {
     emit_long((gs_lwc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)bound->encoding() << 11) | 0 << 6 | gslwle_op);
   }
   void gslwgt(Register rt, Register base, Register bound) {
     emit_long((gs_lwc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)bound->encoding() << 11) | 0 << 6 | gslwgt_op);
   }
   void gsldle(Register rt, Register base, Register bound) {
     emit_long((gs_lwc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)bound->encoding() << 11) | 0 << 6 | gsldle_op);
   }
   void gsldgt(Register rt, Register base, Register bound) {
     emit_long((gs_lwc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)bound->encoding() << 11) | 0 << 6 | gsldgt_op);
   }
   void gslwlec1(FloatRegister rt, Register base, Register bound) {
     emit_long((gs_lwc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)bound->encoding() << 11) | 0 << 6 | gslwlec1_op);
   }
   void gslwgtc1(FloatRegister rt, Register base, Register bound) {
     emit_long((gs_lwc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)bound->encoding() << 11) | 0 << 6 | gslwgtc1_op);
   }
   void gsldlec1(FloatRegister rt, Register base, Register bound) {
     emit_long((gs_lwc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)bound->encoding() << 11) | 0 << 6 | gsldlec1_op);
   }
   void gsldgtc1(FloatRegister rt, Register base, Register bound) {
     emit_long((gs_lwc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)bound->encoding() << 11) | 0 << 6 | gsldgtc1_op);
   }
   void gslq(Register rq, Register rt, Register base, int off) {
     off = off >> 4;
     assert(is_simm(off, 9),"gslq: off exceeds 9 bits");
     emit_long((gs_lwc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | 0 << 15 | (low(off, 9) << 6) | gslq_op | (int)rq->encoding() );
   }
   void gssble(Register rt, Register base, Register bound) {
     emit_long((gs_swc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)bound->encoding() << 11) | 0 << 6 | gssble_op);
   }
   void gssbgt(Register rt, Register base, Register bound) {
     emit_long((gs_swc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)bound->encoding() << 11) | 0 << 6 | gssbgt_op);
   }
   void gsshle(Register rt, Register base, Register bound) {
     emit_long((gs_swc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)bound->encoding() << 11) | 0 << 6 | gsshle_op);
   }
   void gsshgt(Register rt, Register base, Register bound) {
     emit_long((gs_swc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)bound->encoding() << 11) | 0 << 6 | gsshgt_op);
   }
   void gsswle(Register rt, Register base, Register bound) {
     emit_long((gs_swc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)bound->encoding() << 11) | 0 << 6 | gsswle_op);
   }
   void gsswgt(Register rt, Register base, Register bound) {
     emit_long((gs_swc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)bound->encoding() << 11) | 0 << 6 | gsswgt_op);
   }
   void gssdle(Register rt, Register base, Register bound) {
     emit_long((gs_swc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)bound->encoding() << 11) | 0 << 6 | gssdle_op);
   }
   void gssdgt(Register rt, Register base, Register bound) {
     emit_long((gs_swc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)bound->encoding() << 11) | 0 << 6 | gssdgt_op);
   }
   void gsswlec1(FloatRegister rt, Register base, Register bound) {
     emit_long((gs_swc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)bound->encoding() << 11) | 0 << 6 | gsswlec1_op);
   }
   void gsswgtc1(FloatRegister rt, Register base, Register bound) {
     emit_long((gs_swc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)bound->encoding() << 11) | 0 << 6 | gsswgtc1_op);
   }
   void gssdlec1(FloatRegister rt, Register base, Register bound) {
     emit_long((gs_swc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)bound->encoding() << 11) | 0 << 6 | gssdlec1_op);
   }
   void gssdgtc1(FloatRegister rt, Register base, Register bound) {
     emit_long((gs_swc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | ((int)bound->encoding() << 11) | 0 << 6 | gssdgtc1_op);
   }
   void gssq(Register rq, Register rt, Register base, int off) {
     off = off >> 4;
     assert(is_simm(off, 9),"gssq: off exceeds 9 bits");
     emit_long((gs_swc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) | 0 << 15 | (low(off, 9) << 6) | gssq_op | (int)rq->encoding() );
   }
   //LDC2 & SDC2
 #define INSN(OPS, OP) \
     assert(is_simm(off, 8), "NAME: off exceeds 8 bits");                                           \
     assert(UseLoongsonISA, "check LoongISA");                                                      \
     emit_long( (OPS << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) |         \
                ((int)index->encoding() << 11) | (low(off, 8) << 3) | OP);
 #define INSN_LDC2(NAME, op)  \
   void NAME(Register rt, Register base, Register index, int off) {                                 \
     INSN(gs_ldc2_op, op)                                                                           \
   }
 #define INSN_LDC2_F(NAME, op)  \
   void NAME(FloatRegister rt, Register base, Register index, int off) {                            \
     INSN(gs_ldc2_op, op)                                                                           \
   }
 #define INSN_SDC2(NAME, op)  \
   void NAME(Register rt, Register base, Register index, int off) {                                 \
     INSN(gs_sdc2_op, op)                                                                           \
   }
 #define INSN_SDC2_F(NAME, op)  \
   void NAME(FloatRegister rt, Register base, Register index, int off) {                            \
     INSN(gs_sdc2_op, op)                                                                           \
   }
 /*
  void gslbx(Register rt, Register base, Register index, int off) {
     assert(is_simm(off, 8), "gslbx: off exceeds 8 bits");
     assert(UseLoongsonISA, "check LoongISA");
     emit_long( (gs_ldc2_op << 26) | ((int)base->encoding() << 21) | ((int)rt->encoding() << 16) |
                ((int)index->encoding() << 11) | (low(off, 8) << 3) | gslbx_op);
  void gslbx(Register rt, Register base, Register index, int off) {INSN(gs_ldc2_op, gslbx_op);}
   INSN_LDC2(gslbx, gslbx_op)
   INSN_LDC2(gslhx, gslhx_op)
   INSN_LDC2(gslwx, gslwx_op)
   INSN_LDC2(gsldx, gsldx_op)
   INSN_LDC2_F(gslwxc1, gslwxc1_op)
   INSN_LDC2_F(gsldxc1, gsldxc1_op)
   INSN_SDC2(gssbx, gssbx_op)
   INSN_SDC2(gsshx, gsshx_op)
   INSN_SDC2(gsswx, gsswx_op)
   INSN_SDC2(gssdx, gssdx_op)
   INSN_SDC2_F(gsswxc1, gsswxc1_op)
   INSN_SDC2_F(gssdxc1, gssdxc1_op)
 */
   void gslbx(Register rt, Register base, Register index, int off) {INSN(gs_ldc2_op, gslbx_op) }
   void gslhx(Register rt, Register base, Register index, int off) {INSN(gs_ldc2_op, gslhx_op) }
   void gslwx(Register rt, Register base, Register index, int off) {INSN(gs_ldc2_op, gslwx_op) }
   void gsldx(Register rt, Register base, Register index, int off) {INSN(gs_ldc2_op, gsldx_op) }
   void gslwxc1(FloatRegister rt, Register base, Register index, int off) {INSN(gs_ldc2_op, gslwxc1_op) }
   void gsldxc1(FloatRegister rt, Register base, Register index, int off) {INSN(gs_ldc2_op, gsldxc1_op) }
   void gssbx(Register rt, Register base, Register index, int off) {INSN(gs_sdc2_op, gssbx_op) }
   void gsshx(Register rt, Register base, Register index, int off) {INSN(gs_sdc2_op, gsshx_op) }
   void gsswx(Register rt, Register base, Register index, int off) {INSN(gs_sdc2_op, gsswx_op) }
   void gssdx(Register rt, Register base, Register index, int off) {INSN(gs_sdc2_op, gssdx_op) }
   void gsswxc1(FloatRegister rt, Register base, Register index, int off) {INSN(gs_sdc2_op, gsswxc1_op) }
   void gssdxc1(FloatRegister rt, Register base, Register index, int off) {INSN(gs_sdc2_op, gssdxc1_op) }
 #undef INSN
 #undef INSN_LDC2
 #undef INSN_LDC2_F
 #undef INSN_SDC2
 #undef INSN_SDC2_F
 public:
   // Creation
   Assembler(CodeBuffer* code) : AbstractAssembler(code) {
 #ifdef CHECK_DELAY
     delay_state = no_delay;
 #endif
   }
   // Decoding
   static address locate_operand(address inst, WhichOperand which);
   static address locate_next_instruction(address inst);
 };
 // 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()
  public:
   static intptr_t  i[32];
   static float  f[32];
   static void print(outputStream *s);
   static int i_offset(unsigned int k);
   static int f_offset(unsigned int k);
   static void save_registers(MacroAssembler *masm);
   static void restore_registers(MacroAssembler *masm);
  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).
   // use "teq 83, reg" in mips now, by yjl 6/20/2005
   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);
   // Alignment
   void align(int modulus);
   // Misc
   //void fat_nop(); // 5 byte 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);
   // Super call_VM calls - correspond to MacroAssembler::call_VM(_leaf) calls
   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);
   // 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 thread,
                            Register last_java_sp,
                            Register last_java_fp,
                            address last_java_pc);
   // thread in the default location (r15_thread on 64bit)
   void set_last_Java_frame(Register last_java_sp,
                            Register last_java_fp,
                            address last_java_pc);
   void reset_last_Java_frame(Register thread, bool clear_fp, bool clear_pc);
   // thread in the default location (r15_thread on 64bit)
   void reset_last_Java_frame(bool clear_fp, bool clear_pc);
   // Stores
   void store_check(Register obj);                // store check for obj - register is destroyed afterwards
   void store_check(Register obj, Address dst);   // same as above, dst is exact store location (reg. is destroyed)
   void g1_write_barrier_pre(Register obj,
 #ifndef _LP64
                             Register thread,
 #endif
                             Register tmp,
                             Register tmp2,
                             bool     tosca_live);
   void g1_write_barrier_post(Register store_addr,
                              Register new_val,
 #ifndef _LP64
                              Register thread,
 #endif
                              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);
   //add for compressedoops
   void load_klass(Register dst, Register src);
   void store_klass(Register dst, Register src);
   void load_prototype_header(Register dst, Register src);
 /*
   // 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_prototype_header(Register dst, Register src);*/
 #ifdef _LP64
   void store_klass_gap(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 encode_heap_oop(Register dst, Register src);
   void decode_heap_oop(Register r);
   void decode_heap_oop(Register dst, Register src);
   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 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_oop(Register dst, jobject obj);
   // 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);)
   void set_narrow_klass(Register dst, Klass* k);
   void set_narrow_oop(Register dst, jobject obj);
 #endif // _LP64
   void incrementl(Register reg, int value = 1);
   void decrementl(Register reg, int value = 1);
 /*
   // 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
 #ifdef _LP64
   void sign_extend_short(Register reg)   { /*dsll32(reg, reg, 16); dsra32(reg, reg, 16);*/ seh(reg, reg); }
   void sign_extend_byte(Register reg)  { /*dsll32(reg, reg, 24); dsra32(reg, reg, 24);*/ seb(reg, reg); }
 #else
   void sign_extend_short(Register reg)   { /*sll(reg, reg, 16); sra(reg, reg, 16);*/ seh(reg, reg); }
   void sign_extend_byte(Register reg)  { /*sll(reg, reg, 24); sra(reg, reg, 24);*/ seb(reg, reg);}
 #endif
   void rem_s(FloatRegister fd, FloatRegister fs, FloatRegister ft, FloatRegister tmp);
   void rem_d(FloatRegister fd, FloatRegister fs, FloatRegister ft, FloatRegister tmp);
   // 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
     Register t2,
     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);
   //  void set_word_if_not_zero(Register reg); // sets reg to 1 if not zero, otherwise 0
   // 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");
   void verify_oop_subroutine();
   // TODO: verify method and klass metadata (compare against vptr?)
   void _verify_method_ptr(Register reg, const char * msg, const char * file, int line) {}
   void _verify_klass_ptr(Register reg, const char * msg, const char * file, int line){}
   #define verify_method_ptr(reg) _verify_method_ptr(reg, "broken method " #reg, __FILE__, __LINE__)
   #define verify_klass_ptr(reg) _verify_klass_ptr(reg, "broken klass " #reg, __FILE__, __LINE__)
   // only if +VerifyFPU
   void verify_FPU(int stack_depth, const char* s = "illegal FPU state");
   // prints msg, dumps registers and stops execution
   void stop(const char* msg);
   // prints msg and continues
   void warn(const char* msg);
   static void debug(char* msg/*, RegistersForDebugging* regs*/);
   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[]);
   void print_reg(Register reg);
   void print_reg(FloatRegister reg);
   //void os_breakpoint();
   void untested()                                { stop("untested"); }
   void unimplemented(const char* what = "")      { char* b = new char[1024];  jio_snprintf(b, sizeof(b), "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");
     if (offset <= 32768) {
       sw(A0, SP, -offset);
     } else {
 #ifdef _LP64
       li(AT, offset);
       dsub(AT, SP, AT);
 #else
       move(AT, offset);
       sub(AT, SP, AT);
 #endif
       sw(A0, AT, 0);
     }
   }
   // 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();
   void verify_tlab(Register t1, Register t2);
   // 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);
   // Calls
   void call(address entry);
   void call(address entry, relocInfo::relocType rtype);
   void call(address entry, RelocationHolder& rh);
   // Emit the CompiledIC call idiom
   void ic_call(address entry);
   void jmp(address entry);
   void jmp(address entry, relocInfo::relocType rtype);
   // Argument ops
   /*inline void store_int_argument(Register s, Argument& a);
   inline void store_long_argument(Register s, Argument& a);
   inline void store_float_argument(FloatRegister s, Argument& a);
   inline void store_double_argument(FloatRegister s, Argument& a);
   inline void store_ptr_argument(Register s, Argument& a);*/
   inline void store_int_argument(Register s, Argument &a) {
     if(a.is_Register()) {
       move(a.as_Register(), s);
     } else {
       sw(s, a.as_caller_address());
     }
   }
   inline void store_long_argument(Register s, Argument &a) {
     Argument a1 = a.successor();
     if(a.is_Register() && a1.is_Register()) {
       move(a.as_Register(), s);
       move(a.as_Register(), s);
     } else {
       sd(s, a.as_caller_address());
     }
   }
   inline void store_float_argument(FloatRegister s, Argument &a) {
     if(a.is_Register()) {
       mov_s(a.as_FloatRegister(), s);
     } else {
       swc1(s, a.as_caller_address());
     }
   }
   inline void store_double_argument(FloatRegister s, Argument &a) {
     if(a.is_Register()) {
       mov_d(a.as_FloatRegister(), s);
     } else {
       sdc1(s, a.as_caller_address());
     }
   }
   inline void store_ptr_argument(Register s, Argument &a) {
     if(a.is_Register()) {
       move(a.as_Register(), s);
     } else {
       st_ptr(s, a.as_caller_address());
     }
   }
   // 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);
   // interface method calling
   void lookup_interface_method(Register recv_klass,
                                Register intf_klass,
                                RegisterOrConstant itable_index,
                                Register method_result,
                                Register scan_temp,
                                Label& no_such_interface);
   // virtual method calling
   void lookup_virtual_method(Register recv_klass,
                              RegisterOrConstant vtable_index,
                              Register method_result);
   // ld_ptr will perform lw for 32 bit VMs and ld for 64 bit VMs
   // st_ptr will perform sw for 32 bit VMs and sd for 64 bit VMs
   inline void ld_ptr(Register rt, Address a){
 #ifdef _LP64
     ld(rt, a.base(), a.disp());
 #else
     lw(rt, a.base(), a.disp());
 #endif
   }
   inline void ld_ptr(Register rt, Register base, int offset16){
 #ifdef _LP64
     ld(rt, base, offset16);
 #else
     lw(rt, base, offset16);
 #endif
   }
   inline void st_ptr(Register rt, Address a){
 #ifdef _LP64
     sd(rt, a.base(), a.disp());
 #else
     sw(rt, a.base(), a.disp());
 #endif
   }
   inline void st_ptr(Register rt, Register base, int offset16) {
 #ifdef _LP64
     sd(rt, base, offset16);
 #else
     sw(rt, base, offset16);
 #endif
   }
   void ld_ptr(Register rt, Register offset, Register base);
   void st_ptr(Register rt, Register offset, Register base);
   // ld_long will perform lw for 32 bit VMs and ld for 64 bit VMs
   // st_long will perform sw for 32 bit VMs and sd for 64 bit VMs
   inline void ld_long(Register rt, Register base, int offset16);
   inline void st_long(Register rt, Register base, int offset16);
   inline void ld_long(Register rt, Address a);
   inline void st_long(Register rt, Address a);
   void ld_long(Register rt, Register offset, Register base);
   void st_long(Register rt, Register offset, Register base);
   // Regular vs. d* versions
   inline void addu_long(Register rd, Register rs, Register rt) {
 #ifdef _LP64
     daddu(rd, rs, rt);
 #else
     addu(rd, rs, rt);
 #endif
   }
   inline void addu_long(Register rd, Register rs, long imm32_64) {
 #ifdef _LP64
     daddiu(rd, rs, imm32_64);
 #else
     addiu(rd, rs, imm32_64);
 #endif
   }
   // Floating
  public:
   // swap the two byte of the low 16-bit halfword
   // this directive will use AT, be sure the high 16-bit of reg is zero
   // by yjl 6/28/2005
   void hswap(Register reg);
   void huswap(Register reg);
   // convert big endian integer to little endian integer
   // by yjl 6/29/2005
   void swap(Register reg);
   // implement the x86 instruction semantic
   // if c_reg == *dest then *dest <= x_reg
   // else c_reg <= *dest
   // the AT indicate if xchg occurred, 1 for xchged, else  0
   // by yjl 6/28/2005
   void cmpxchg(Register x_reg, Address dest, Register c_reg);
 #ifdef _LP64
   void cmpxchg32(Register x_reg, Address dest, Register c_reg);
 #endif
   void cmpxchg8(Register x_regLo, Register x_regHi, Address dest, Register c_regLo, Register c_regHi);
   void round_to(Register reg, int modulus) {
     assert_different_registers(reg, AT);
     increment(reg, modulus - 1);
     move(AT, - modulus);
     andr(reg, reg, AT);
   }
   //pop & push, added by aoqi
 #ifdef _LP64
   void extend_sign(Register rh, Register rl) { stop("extend_sign"); }
   void neg(Register reg) { dsubu(reg, R0, reg); }
   void push (Register reg)      { sd  (reg, SP, -8); daddi(SP, SP, -8); }
   void push (FloatRegister reg) { sdc1(reg, SP, -8); daddi(SP, SP, -8); }
   void pop  (Register reg)      { ld  (reg, SP, 0);  daddi(SP, SP, 8); }
   void pop  (FloatRegister reg) { ldc1(reg, SP, 0);  daddi(SP, SP, 8); }
   void pop  ()                  { daddi(SP, SP, 8); }
   void pop2 ()                  { daddi(SP, SP, 16); }
 #else
   void extend_sign(Register rh, Register rl) { sra(rh, rl, 31); }
   void neg(Register reg) { subu(reg, R0, reg); }
   void push (Register reg)      { sw  (reg, SP, -4); addi(SP, SP, -4); }
   void push (FloatRegister reg) { swc1(reg, SP, -4); addi(SP, SP, -4); }
   void pop  (Register reg)      { lw  (reg, SP, 0);  addi(SP, SP, 4); }
   void pop  (FloatRegister reg) { lwc1(reg, SP, 0);  addi(SP, SP, 4); }
   void pop  ()                  { addi(SP, SP, 4); }
   void pop2 ()                  { addi(SP, SP, 8); }
 #endif
   void push2(Register reg1, Register reg2);
   void pop2 (Register reg1, Register reg2);
   void dpush (Register reg)     { sd  (reg, SP, -8); daddi(SP, SP, -8); }
   void dpop  (Register reg)     { ld  (reg, SP, 0);  daddi(SP, SP, 8); }
   /* branches may exceed 16-bit offset */
   void b_far(address entry);
   void b_far(Label& L);
   void bne_far    (Register rs, Register rt, address entry);
   void bne_far    (Register rs, Register rt, Label& L);
   void beq_far    (Register rs, Register rt, address entry);
   void beq_far    (Register rs, Register rt, Label& L);
   //move an 32-bit immediate to Register
   void move(Register reg, int imm32)  { li32(reg, imm32); }
   void li  (Register rd, long imm);
   void li  (Register rd, address addr) { li(rd, (long)addr); }
   //replace move(Register reg, int imm)
   void li32(Register rd, int imm32); // sign-extends to 64 bits on mips64
 #ifdef _LP64
   void set64(Register d, jlong value);
   static int  insts_for_set64(jlong value);
   void patchable_set48(Register d, jlong value);
   void patchable_set32(Register d, jlong value);
   void patchable_call32(Register d, jlong value);
   static int call_size(address target, bool far, bool patchable);
   static bool reachable_from_cache(address target);
   void patchable_call(address target);
   void general_call(address target);
   void patchable_jump(address target);
   void general_jump(address target);
   void dli(Register rd, long imm) { li(rd, imm); }
   void li64(Register rd, long imm);
   void li48(Register rd, long imm);
 #endif
 #ifdef _LP64
   void move(Register rd, Register rs)   { dadd(rd, rs, R0); }
   void move_u32(Register rd, Register rs)   { addu32(rd, rs, R0); }
 #else
   void move(Register rd, Register rs)   { add(rd, rs, R0); }
 #endif
   void dmove(Register rd, Register rs)  { dadd(rd, rs, R0); }
 #ifdef _LP64
   void shl(Register reg, int sa)        { dsll(reg, reg, sa); }
   void shr(Register reg, int sa)        { dsrl(reg, reg, sa); }
   void sar(Register reg, int sa)        { dsra(reg, reg, sa); }
 #else
   void shl(Register reg, int sa)        { sll(reg, reg, sa); }
   void shr(Register reg, int sa)        { srl(reg, reg, sa); }
   void sar(Register reg, int sa)        { sra(reg, reg, sa); }
 #endif
 #ifndef PRODUCT
   static void pd_print_patched_instruction(address branch) {
     jint stub_inst = *(jint*) branch;
     print_instruction(stub_inst);
     ::tty->print("%s", " (unresolved)");
   }
 #endif
   // the follow two might use AT register, be sure you have no meanful data in AT before you call them
   void increment(Register reg, int imm);
   void decrement(Register reg, int imm);
   //FIXME
   void empty_FPU_stack(){/*need implemented*/};
   //we need 2 fun to save and resotre general register
   void pushad();
   void popad();
   // 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 get_vm_result  (Register oop_result, Register thread);
   void get_vm_result_2(Register metadata_result, Register thread);
 #undef VIRTUAL
   void atomic_inc32(address counter_addr, int inc, Register tmp_reg1, Register tmp_reg2);
   void fast_lock(Register obj, Register box, Register tmp, Register scr);
   void fast_unlock(Register obj, Register box, Register tmp);
 };
 /**
  * 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
 #endif // CPU_MIPS_VM_ASSEMBLER_MIPS_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/mips/vm/assembler_mips.hpp@4bfb40d1e17a (annotated)

src/cpu/mips/vm/assembler_mips.hpp