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

src/cpu/x86/vm/assembler_x86.hpp@cf8470eaf7e5 (annotated)

src/cpu/x86/vm/assembler_x86.hpp

Sun, 27 Jan 2013 21:58:34 -0500

author: acorn
date: Sun, 27 Jan 2013 21:58:34 -0500
changeset 4496: cf8470eaf7e5
parent 4479: b30b3c2a0cf2
parent 4492: 8b46b0196eb0
child 5353: b800986664f4
permissions: -rw-r--r--

Merge

 /*
  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef CPU_X86_VM_ASSEMBLER_X86_HPP
 #define CPU_X86_VM_ASSEMBLER_X86_HPP
 #include "asm/register.hpp"
 class BiasedLockingCounters;
 // Contains all the definitions needed for x86 assembly code generation.
 // Calling convention
 class Argument VALUE_OBJ_CLASS_SPEC {
  public:
   enum {
 #ifdef _LP64
 #ifdef _WIN64
     n_int_register_parameters_c   = 4, // rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
     n_float_register_parameters_c = 4,  // xmm0 - xmm3 (c_farg0, c_farg1, ... )
 #else
     n_int_register_parameters_c   = 6, // rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
     n_float_register_parameters_c = 8,  // xmm0 - xmm7 (c_farg0, c_farg1, ... )
 #endif // _WIN64
     n_int_register_parameters_j   = 6, // j_rarg0, j_rarg1, ...
     n_float_register_parameters_j = 8  // j_farg0, j_farg1, ...
 #else
     n_register_parameters = 0   // 0 registers used to pass arguments
 #endif // _LP64
   };
 };
 #ifdef _LP64
 // Symbolically name the register arguments used by the c calling convention.
 // Windows is different from linux/solaris. So much for standards...
 #ifdef _WIN64
 REGISTER_DECLARATION(Register, c_rarg0, rcx);
 REGISTER_DECLARATION(Register, c_rarg1, rdx);
 REGISTER_DECLARATION(Register, c_rarg2, r8);
 REGISTER_DECLARATION(Register, c_rarg3, r9);
 REGISTER_DECLARATION(XMMRegister, c_farg0, xmm0);
 REGISTER_DECLARATION(XMMRegister, c_farg1, xmm1);
 REGISTER_DECLARATION(XMMRegister, c_farg2, xmm2);
 REGISTER_DECLARATION(XMMRegister, c_farg3, xmm3);
 #else
 REGISTER_DECLARATION(Register, c_rarg0, rdi);
 REGISTER_DECLARATION(Register, c_rarg1, rsi);
 REGISTER_DECLARATION(Register, c_rarg2, rdx);
 REGISTER_DECLARATION(Register, c_rarg3, rcx);
 REGISTER_DECLARATION(Register, c_rarg4, r8);
 REGISTER_DECLARATION(Register, c_rarg5, r9);
 REGISTER_DECLARATION(XMMRegister, c_farg0, xmm0);
 REGISTER_DECLARATION(XMMRegister, c_farg1, xmm1);
 REGISTER_DECLARATION(XMMRegister, c_farg2, xmm2);
 REGISTER_DECLARATION(XMMRegister, c_farg3, xmm3);
 REGISTER_DECLARATION(XMMRegister, c_farg4, xmm4);
 REGISTER_DECLARATION(XMMRegister, c_farg5, xmm5);
 REGISTER_DECLARATION(XMMRegister, c_farg6, xmm6);
 REGISTER_DECLARATION(XMMRegister, c_farg7, xmm7);
 #endif // _WIN64
 // Symbolically name the register arguments used by the Java calling convention.
 // We have control over the convention for java so we can do what we please.
 // What pleases us is to offset the java calling convention so that when
 // we call a suitable jni method the arguments are lined up and we don't
 // have to do little shuffling. A suitable jni method is non-static and a
 // small number of arguments (two fewer args on windows)
 //
 //        |-------------------------------------------------------|
 //        | c_rarg0   c_rarg1  c_rarg2 c_rarg3 c_rarg4 c_rarg5    |
 //        |-------------------------------------------------------|
 //        | rcx       rdx      r8      r9      rdi*    rsi*       | windows (* not a c_rarg)
 //        | rdi       rsi      rdx     rcx     r8      r9         | solaris/linux
 //        |-------------------------------------------------------|
 //        | j_rarg5   j_rarg0  j_rarg1 j_rarg2 j_rarg3 j_rarg4    |
 //        |-------------------------------------------------------|
 REGISTER_DECLARATION(Register, j_rarg0, c_rarg1);
 REGISTER_DECLARATION(Register, j_rarg1, c_rarg2);
 REGISTER_DECLARATION(Register, j_rarg2, c_rarg3);
 // Windows runs out of register args here
 #ifdef _WIN64
 REGISTER_DECLARATION(Register, j_rarg3, rdi);
 REGISTER_DECLARATION(Register, j_rarg4, rsi);
 #else
 REGISTER_DECLARATION(Register, j_rarg3, c_rarg4);
 REGISTER_DECLARATION(Register, j_rarg4, c_rarg5);
 #endif /* _WIN64 */
 REGISTER_DECLARATION(Register, j_rarg5, c_rarg0);
 REGISTER_DECLARATION(XMMRegister, j_farg0, xmm0);
 REGISTER_DECLARATION(XMMRegister, j_farg1, xmm1);
 REGISTER_DECLARATION(XMMRegister, j_farg2, xmm2);
 REGISTER_DECLARATION(XMMRegister, j_farg3, xmm3);
 REGISTER_DECLARATION(XMMRegister, j_farg4, xmm4);
 REGISTER_DECLARATION(XMMRegister, j_farg5, xmm5);
 REGISTER_DECLARATION(XMMRegister, j_farg6, xmm6);
 REGISTER_DECLARATION(XMMRegister, j_farg7, xmm7);
 REGISTER_DECLARATION(Register, rscratch1, r10);  // volatile
 REGISTER_DECLARATION(Register, rscratch2, r11);  // volatile
 REGISTER_DECLARATION(Register, r12_heapbase, r12); // callee-saved
 REGISTER_DECLARATION(Register, r15_thread, r15); // callee-saved
 #else
 // rscratch1 will apear in 32bit code that is dead but of course must compile
 // Using noreg ensures if the dead code is incorrectly live and executed it
 // will cause an assertion failure
 #define rscratch1 noreg
 #define rscratch2 noreg
 #endif // _LP64
 // JSR 292 fixed register usages:
 REGISTER_DECLARATION(Register, rbp_mh_SP_save, rbp);
 // Address is an abstraction used to represent a memory location
 // using any of the amd64 addressing modes with one object.
 //
 // Note: A register location is represented via a Register, not
 //       via an address for efficiency & simplicity reasons.
 class ArrayAddress;
 class Address VALUE_OBJ_CLASS_SPEC {
  public:
   enum ScaleFactor {
     no_scale = -1,
     times_1  =  0,
     times_2  =  1,
     times_4  =  2,
     times_8  =  3,
     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;
   }
   static int scale_size(ScaleFactor scale) {
     assert(scale != no_scale, "");
     assert(((1 << (int)times_1) == 1 &&
             (1 << (int)times_2) == 2 &&
             (1 << (int)times_4) == 4 &&
             (1 << (int)times_8) == 8), "");
     return (1 << (int)scale);
   }
  private:
   Register         _base;
   Register         _index;
   ScaleFactor      _scale;
   int              _disp;
   RelocationHolder _rspec;
   // Easily misused constructors make them private
   // %%% can we make these go away?
   NOT_LP64(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, 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");
   }
   Address(Register base, RegisterOrConstant index, ScaleFactor scale = times_1, int disp = 0)
     : _base (base),
       _index(index.register_or_noreg()),
       _scale(scale),
       _disp (disp + (index.constant_or_zero() * scale_size(scale))) {
     if (!index.is_register())  scale = Address::no_scale;
     assert(!_index->is_valid() == (scale == Address::no_scale),
            "inconsistent address");
   }
   Address plus_disp(int disp) const {
     Address a = (*this);
     a._disp += disp;
     return a;
   }
   Address plus_disp(RegisterOrConstant disp, ScaleFactor scale = times_1) const {
     Address a = (*this);
     a._disp += disp.constant_or_zero() * scale_size(scale);
     if (disp.is_register()) {
       assert(!a.index()->is_valid(), "competing indexes");
       a._index = disp.as_register();
       a._scale = scale;
     }
     return a;
   }
   bool is_same_address(Address a) const {
     // disregard _rspec
     return _base == a._base && _disp == a._disp && _index == a._index && _scale == a._scale;
   }
   // 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");
   }
   Address(Register base, RegisterOrConstant index, ScaleFactor scale, ByteSize disp)
     : _base (base),
       _index(index.register_or_noreg()),
       _scale(scale),
       _disp (in_bytes(disp) + (index.constant_or_zero() * scale_size(scale))) {
     if (!index.is_register())  scale = Address::no_scale;
     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, relocInfo::relocType disp_reloc);
   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
 };
 //
 // AddressLiteral has been split out from Address because operands of this type
 // need to be treated specially on 32bit vs. 64bit platforms. By splitting it out
 // the few instructions that need to deal with address literals are unique and the
 // MacroAssembler does not have to implement every instruction in the Assembler
 // in order to search for address literals that may need special handling depending
 // on the instruction and the platform. As small step on the way to merging i486/amd64
 // directories.
 //
 class AddressLiteral VALUE_OBJ_CLASS_SPEC {
   friend class ArrayAddress;
   RelocationHolder _rspec;
   // Typically we use AddressLiterals we want to use their rval
   // However in some situations we want the lval (effect address) of the item.
   // We provide a special factory for making those lvals.
   bool _is_lval;
   // If the target is far we'll need to load the ea of this to
   // a register to reach it. Otherwise if near we can do rip
   // relative addressing.
   address          _target;
  protected:
   // creation
   AddressLiteral()
     : _is_lval(false),
       _target(NULL)
   {}
   public:
   AddressLiteral(address target, relocInfo::relocType rtype);
   AddressLiteral(address target, RelocationHolder const& rspec)
     : _rspec(rspec),
       _is_lval(false),
       _target(target)
   {}
   AddressLiteral addr() {
     AddressLiteral ret = *this;
     ret._is_lval = true;
     return ret;
   }
  private:
   address target() { return _target; }
   bool is_lval() { return _is_lval; }
   relocInfo::relocType reloc() const { return _rspec.type(); }
   const RelocationHolder& rspec() const { return _rspec; }
   friend class Assembler;
   friend class MacroAssembler;
   friend class Address;
   friend class LIR_Assembler;
 };
 // Convience classes
 class RuntimeAddress: public AddressLiteral {
   public:
   RuntimeAddress(address target) : AddressLiteral(target, relocInfo::runtime_call_type) {}
 };
 class ExternalAddress: public AddressLiteral {
  private:
   static relocInfo::relocType reloc_for_target(address target) {
     // Sometimes ExternalAddress is used for values which aren't
     // exactly addresses, like the card table base.
     // external_word_type can't be used for values in the first page
     // so just skip the reloc in that case.
     return external_word_Relocation::can_be_relocated(target) ? relocInfo::external_word_type : relocInfo::none;
   }
  public:
   ExternalAddress(address target) : AddressLiteral(target, reloc_for_target(target)) {}
 };
 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 Intel x86/Amd64 Assembler: Pure assembler doing NO optimizations on the instruction
 // level (e.g. mov rax, 0 is not translated into xor rax, rax!); i.e., what you write
 // is what you get. The Assembler is generating code into a CodeBuffer.
 class Assembler : public AbstractAssembler  {
   friend class AbstractAssembler; // for the non-virtual hack
   friend class LIR_Assembler; // as_Address()
   friend class StubGenerator;
  public:
   enum Condition {                     // The x86 condition codes used for conditional jumps/moves.
     zero          = 0x4,
     notZero       = 0x5,
     equal         = 0x4,
     notEqual      = 0x5,
     less          = 0xc,
     lessEqual     = 0xe,
     greater       = 0xf,
     greaterEqual  = 0xd,
     below         = 0x2,
     belowEqual    = 0x6,
     above         = 0x7,
     aboveEqual    = 0x3,
     overflow      = 0x0,
     noOverflow    = 0x1,
     carrySet      = 0x2,
     carryClear    = 0x3,
     negative      = 0x8,
     positive      = 0x9,
     parity        = 0xa,
     noParity      = 0xb
   };
   enum Prefix {
     // segment overrides
     CS_segment = 0x2e,
     SS_segment = 0x36,
     DS_segment = 0x3e,
     ES_segment = 0x26,
     FS_segment = 0x64,
     GS_segment = 0x65,
     REX        = 0x40,
     REX_B      = 0x41,
     REX_X      = 0x42,
     REX_XB     = 0x43,
     REX_R      = 0x44,
     REX_RB     = 0x45,
     REX_RX     = 0x46,
     REX_RXB    = 0x47,
     REX_W      = 0x48,
     REX_WB     = 0x49,
     REX_WX     = 0x4A,
     REX_WXB    = 0x4B,
     REX_WR     = 0x4C,
     REX_WRB    = 0x4D,
     REX_WRX    = 0x4E,
     REX_WRXB   = 0x4F,
     VEX_3bytes = 0xC4,
     VEX_2bytes = 0xC5
   };
   enum VexPrefix {
     VEX_B = 0x20,
     VEX_X = 0x40,
     VEX_R = 0x80,
     VEX_W = 0x80
   };
   enum VexSimdPrefix {
     VEX_SIMD_NONE = 0x0,
     VEX_SIMD_66   = 0x1,
     VEX_SIMD_F3   = 0x2,
     VEX_SIMD_F2   = 0x3
   };
   enum VexOpcode {
     VEX_OPCODE_NONE  = 0x0,
     VEX_OPCODE_0F    = 0x1,
     VEX_OPCODE_0F_38 = 0x2,
     VEX_OPCODE_0F_3A = 0x3
   };
   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
   };
   // NOTE: The general philopsophy of the declarations here is that 64bit versions
   // of instructions are freely declared without the need for wrapping them an ifdef.
   // (Some dangerous instructions are ifdef's out of inappropriate jvm's.)
   // In the .cpp file the implementations are wrapped so that they are dropped out
   // of the resulting jvm. This is done mostly to keep the footprint of MINIMAL
   // to the size it was prior to merging up the 32bit and 64bit assemblers.
   //
   // This does mean you'll get a linker/runtime error if you use a 64bit only instruction
   // in a 32bit vm. This is somewhat unfortunate but keeps the ifdef noise down.
 private:
   // 64bit prefixes
   int prefix_and_encode(int reg_enc, bool byteinst = false);
   int prefixq_and_encode(int reg_enc);
   int prefix_and_encode(int dst_enc, int src_enc, bool byteinst = false);
   int prefixq_and_encode(int dst_enc, int src_enc);
   void prefix(Register reg);
   void prefix(Address adr);
   void prefixq(Address adr);
   void prefix(Address adr, Register reg,  bool byteinst = false);
   void prefix(Address adr, XMMRegister reg);
   void prefixq(Address adr, Register reg);
   void prefixq(Address adr, XMMRegister reg);
   void prefetch_prefix(Address src);
   void rex_prefix(Address adr, XMMRegister xreg,
                   VexSimdPrefix pre, VexOpcode opc, bool rex_w);
   int  rex_prefix_and_encode(int dst_enc, int src_enc,
                              VexSimdPrefix pre, VexOpcode opc, bool rex_w);
   void vex_prefix(bool vex_r, bool vex_b, bool vex_x, bool vex_w,
                   int nds_enc, VexSimdPrefix pre, VexOpcode opc,
                   bool vector256);
   void vex_prefix(Address adr, int nds_enc, int xreg_enc,
                   VexSimdPrefix pre, VexOpcode opc,
                   bool vex_w, bool vector256);
   void vex_prefix(XMMRegister dst, XMMRegister nds, Address src,
                   VexSimdPrefix pre, bool vector256 = false) {
     int dst_enc = dst->encoding();
     int nds_enc = nds->is_valid() ? nds->encoding() : 0;
     vex_prefix(src, nds_enc, dst_enc, pre, VEX_OPCODE_0F, false, vector256);
   }
   int  vex_prefix_and_encode(int dst_enc, int nds_enc, int src_enc,
                              VexSimdPrefix pre, VexOpcode opc,
                              bool vex_w, bool vector256);
   int  vex_prefix_and_encode(XMMRegister dst, XMMRegister nds, XMMRegister src,
                              VexSimdPrefix pre, bool vector256 = false,
                              VexOpcode opc = VEX_OPCODE_0F) {
     int src_enc = src->encoding();
     int dst_enc = dst->encoding();
     int nds_enc = nds->is_valid() ? nds->encoding() : 0;
     return vex_prefix_and_encode(dst_enc, nds_enc, src_enc, pre, opc, false, vector256);
   }
   void simd_prefix(XMMRegister xreg, XMMRegister nds, Address adr,
                    VexSimdPrefix pre, VexOpcode opc = VEX_OPCODE_0F,
                    bool rex_w = false, bool vector256 = false);
   void simd_prefix(XMMRegister dst, Address src,
                    VexSimdPrefix pre, VexOpcode opc = VEX_OPCODE_0F) {
     simd_prefix(dst, xnoreg, src, pre, opc);
   }
   void simd_prefix(Address dst, XMMRegister src, VexSimdPrefix pre) {
     simd_prefix(src, dst, pre);
   }
   void simd_prefix_q(XMMRegister dst, XMMRegister nds, Address src,
                      VexSimdPrefix pre) {
     bool rex_w = true;
     simd_prefix(dst, nds, src, pre, VEX_OPCODE_0F, rex_w);
   }
   int simd_prefix_and_encode(XMMRegister dst, XMMRegister nds, XMMRegister src,
                              VexSimdPrefix pre, VexOpcode opc = VEX_OPCODE_0F,
                              bool rex_w = false, bool vector256 = false);
   // Move/convert 32-bit integer value.
   int simd_prefix_and_encode(XMMRegister dst, XMMRegister nds, Register src,
                              VexSimdPrefix pre) {
     // It is OK to cast from Register to XMMRegister to pass argument here
     // since only encoding is used in simd_prefix_and_encode() and number of
     // Gen and Xmm registers are the same.
     return simd_prefix_and_encode(dst, nds, as_XMMRegister(src->encoding()), pre);
   }
   int simd_prefix_and_encode(XMMRegister dst, Register src, VexSimdPrefix pre) {
     return simd_prefix_and_encode(dst, xnoreg, src, pre);
   }
   int simd_prefix_and_encode(Register dst, XMMRegister src,
                              VexSimdPrefix pre, VexOpcode opc = VEX_OPCODE_0F) {
     return simd_prefix_and_encode(as_XMMRegister(dst->encoding()), xnoreg, src, pre, opc);
   }
   // Move/convert 64-bit integer value.
   int simd_prefix_and_encode_q(XMMRegister dst, XMMRegister nds, Register src,
                                VexSimdPrefix pre) {
     bool rex_w = true;
     return simd_prefix_and_encode(dst, nds, as_XMMRegister(src->encoding()), pre, VEX_OPCODE_0F, rex_w);
   }
   int simd_prefix_and_encode_q(XMMRegister dst, Register src, VexSimdPrefix pre) {
     return simd_prefix_and_encode_q(dst, xnoreg, src, pre);
   }
   int simd_prefix_and_encode_q(Register dst, XMMRegister src,
                              VexSimdPrefix pre, VexOpcode opc = VEX_OPCODE_0F) {
     bool rex_w = true;
     return simd_prefix_and_encode(as_XMMRegister(dst->encoding()), xnoreg, src, pre, opc, rex_w);
   }
   // Helper functions for groups of instructions
   void emit_arith_b(int op1, int op2, Register dst, int imm8);
   void emit_arith(int op1, int op2, Register dst, int32_t imm32);
   // Force generation of a 4 byte immediate value even if it fits into 8bit
   void emit_arith_imm32(int op1, int op2, Register dst, int32_t imm32);
   void emit_arith(int op1, int op2, Register dst, Register src);
   void emit_simd_arith(int opcode, XMMRegister dst, Address src, VexSimdPrefix pre);
   void emit_simd_arith(int opcode, XMMRegister dst, XMMRegister src, VexSimdPrefix pre);
   void emit_simd_arith_nonds(int opcode, XMMRegister dst, Address src, VexSimdPrefix pre);
   void emit_simd_arith_nonds(int opcode, XMMRegister dst, XMMRegister src, VexSimdPrefix pre);
   void emit_vex_arith(int opcode, XMMRegister dst, XMMRegister nds,
                       Address src, VexSimdPrefix pre, bool vector256);
   void emit_vex_arith(int opcode, XMMRegister dst, XMMRegister nds,
                       XMMRegister src, VexSimdPrefix pre, bool vector256);
   void emit_operand(Register reg,
                     Register base, Register index, Address::ScaleFactor scale,
                     int disp,
                     RelocationHolder const& rspec,
                     int rip_relative_correction = 0);
   void emit_operand(Register reg, Address adr, int rip_relative_correction = 0);
   // operands that only take the original 32bit registers
   void emit_operand32(Register reg, Address adr);
   void emit_operand(XMMRegister reg,
                     Register base, Register index, Address::ScaleFactor scale,
                     int disp,
                     RelocationHolder const& rspec);
   void emit_operand(XMMRegister reg, Address adr);
   void emit_operand(MMXRegister reg, Address adr);
   // workaround gcc (3.2.1-7) bug
   void emit_operand(Address adr, MMXRegister reg);
   // Immediate-to-memory forms
   void emit_arith_operand(int op1, Register rm, Address adr, int32_t imm32);
   void emit_farith(int b1, int b2, int i);
  protected:
   #ifdef ASSERT
   void check_relocation(RelocationHolder const& rspec, int format);
   #endif
   void emit_data(jint data, relocInfo::relocType    rtype, int format);
   void emit_data(jint data, RelocationHolder const& rspec, int format);
   void emit_data64(jlong data, relocInfo::relocType rtype, int format = 0);
   void emit_data64(jlong data, RelocationHolder const& rspec, int format = 0);
   bool reachable(AddressLiteral adr) NOT_LP64({ return true;});
   // These are all easily abused and hence protected
   // 32BIT ONLY SECTION
 #ifndef _LP64
   // Make these disappear in 64bit mode since they would never be correct
   void cmp_literal32(Register src1, int32_t imm32, RelocationHolder const& rspec);   // 32BIT ONLY
   void cmp_literal32(Address src1, int32_t imm32, RelocationHolder const& rspec);    // 32BIT ONLY
   void mov_literal32(Register dst, int32_t imm32, RelocationHolder const& rspec);    // 32BIT ONLY
   void mov_literal32(Address dst, int32_t imm32, RelocationHolder const& rspec);     // 32BIT ONLY
   void push_literal32(int32_t imm32, RelocationHolder const& rspec);                 // 32BIT ONLY
 #else
   // 64BIT ONLY SECTION
   void mov_literal64(Register dst, intptr_t imm64, RelocationHolder const& rspec);   // 64BIT ONLY
   void cmp_narrow_oop(Register src1, int32_t imm32, RelocationHolder const& rspec);
   void cmp_narrow_oop(Address src1, int32_t imm32, RelocationHolder const& rspec);
   void mov_narrow_oop(Register dst, int32_t imm32, RelocationHolder const& rspec);
   void mov_narrow_oop(Address dst, int32_t imm32, RelocationHolder const& rspec);
 #endif // _LP64
   // These are unique in that we are ensured by the caller that the 32bit
   // relative in these instructions will always be able to reach the potentially
   // 64bit address described by entry. Since they can take a 64bit address they
   // don't have the 32 suffix like the other instructions in this class.
   void call_literal(address entry, RelocationHolder const& rspec);
   void jmp_literal(address entry, RelocationHolder const& rspec);
   // Avoid using directly section
   // Instructions in this section are actually usable by anyone without danger
   // of failure but have performance issues that are addressed my enhanced
   // instructions which will do the proper thing base on the particular cpu.
   // We protect them because we don't trust you...
   // Don't use next inc() and dec() methods directly. INC & DEC instructions
   // could cause a partial flag stall since they don't set CF flag.
   // Use MacroAssembler::decrement() & MacroAssembler::increment() methods
   // which call inc() & dec() or add() & sub() in accordance with
   // the product flag UseIncDec value.
   void decl(Register dst);
   void decl(Address dst);
   void decq(Register dst);
   void decq(Address dst);
   void incl(Register dst);
   void incl(Address dst);
   void incq(Register dst);
   void incq(Address dst);
   // New cpus require use of movsd and movss to avoid partial register stall
   // when loading from memory. But for old Opteron use movlpd instead of movsd.
   // The selection is done in MacroAssembler::movdbl() and movflt().
   // Move Scalar Single-Precision Floating-Point Values
   void movss(XMMRegister dst, Address src);
   void movss(XMMRegister dst, XMMRegister src);
   void movss(Address dst, XMMRegister src);
   // Move Scalar Double-Precision Floating-Point Values
   void movsd(XMMRegister dst, Address src);
   void movsd(XMMRegister dst, XMMRegister src);
   void movsd(Address dst, XMMRegister src);
   void movlpd(XMMRegister dst, Address src);
   // New cpus require use of movaps and movapd to avoid partial register stall
   // when moving between registers.
   void movaps(XMMRegister dst, XMMRegister src);
   void movapd(XMMRegister dst, XMMRegister src);
   // End avoid using directly
   // Instruction prefixes
   void prefix(Prefix p);
   public:
   // Creation
   Assembler(CodeBuffer* code) : AbstractAssembler(code) {}
   // Decoding
   static address locate_operand(address inst, WhichOperand which);
   static address locate_next_instruction(address inst);
   // Utilities
   static bool is_polling_page_far() NOT_LP64({ return false;});
   // 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
   void lea(Register dst, Address src);
   void mov(Register dst, Register src);
   void pusha();
   void popa();
   void pushf();
   void popf();
   void push(int32_t imm32);
   void push(Register src);
   void pop(Register dst);
   // These are dummies to prevent surprise implicit conversions to Register
   void push(void* v);
   void pop(void* v);
   // These do register sized moves/scans
   void rep_mov();
   void rep_stos();
   void rep_stosb();
   void repne_scan();
 #ifdef _LP64
   void repne_scanl();
 #endif
   // Vanilla instructions in lexical order
   void adcl(Address dst, int32_t imm32);
   void adcl(Address dst, Register src);
   void adcl(Register dst, int32_t imm32);
   void adcl(Register dst, Address src);
   void adcl(Register dst, Register src);
   void adcq(Register dst, int32_t imm32);
   void adcq(Register dst, Address src);
   void adcq(Register dst, Register src);
   void addl(Address dst, int32_t imm32);
   void addl(Address dst, Register src);
   void addl(Register dst, int32_t imm32);
   void addl(Register dst, Address src);
   void addl(Register dst, Register src);
   void addq(Address dst, int32_t imm32);
   void addq(Address dst, Register src);
   void addq(Register dst, int32_t imm32);
   void addq(Register dst, Address src);
   void addq(Register dst, Register src);
   void addr_nop_4();
   void addr_nop_5();
   void addr_nop_7();
   void addr_nop_8();
   // Add Scalar Double-Precision Floating-Point Values
   void addsd(XMMRegister dst, Address src);
   void addsd(XMMRegister dst, XMMRegister src);
   // Add Scalar Single-Precision Floating-Point Values
   void addss(XMMRegister dst, Address src);
   void addss(XMMRegister dst, XMMRegister src);
   // AES instructions
   void aesdec(XMMRegister dst, Address src);
   void aesdec(XMMRegister dst, XMMRegister src);
   void aesdeclast(XMMRegister dst, Address src);
   void aesdeclast(XMMRegister dst, XMMRegister src);
   void aesenc(XMMRegister dst, Address src);
   void aesenc(XMMRegister dst, XMMRegister src);
   void aesenclast(XMMRegister dst, Address src);
   void aesenclast(XMMRegister dst, XMMRegister src);
   void andl(Address  dst, int32_t imm32);
   void andl(Register dst, int32_t imm32);
   void andl(Register dst, Address src);
   void andl(Register dst, Register src);
   void andq(Address  dst, int32_t imm32);
   void andq(Register dst, int32_t imm32);
   void andq(Register dst, Address src);
   void andq(Register dst, Register src);
   void bsfl(Register dst, Register src);
   void bsrl(Register dst, Register src);
 #ifdef _LP64
   void bsfq(Register dst, Register src);
   void bsrq(Register dst, Register src);
 #endif
   void bswapl(Register reg);
   void bswapq(Register reg);
   void call(Label& L, relocInfo::relocType rtype);
   void call(Register reg);  // push pc; pc <- reg
   void call(Address adr);   // push pc; pc <- adr
   void cdql();
   void cdqq();
   void cld();
   void clflush(Address adr);
   void cmovl(Condition cc, Register dst, Register src);
   void cmovl(Condition cc, Register dst, Address src);
   void cmovq(Condition cc, Register dst, Register src);
   void cmovq(Condition cc, Register dst, Address src);
   void cmpb(Address dst, int imm8);
   void cmpl(Address dst, int32_t imm32);
   void cmpl(Register dst, int32_t imm32);
   void cmpl(Register dst, Register src);
   void cmpl(Register dst, Address src);
   void cmpq(Address dst, int32_t imm32);
   void cmpq(Address dst, Register src);
   void cmpq(Register dst, int32_t imm32);
   void cmpq(Register dst, Register src);
   void cmpq(Register dst, Address src);
   // these are dummies used to catch attempting to convert NULL to Register
   void cmpl(Register dst, void* junk); // dummy
   void cmpq(Register dst, void* junk); // dummy
   void cmpw(Address dst, int imm16);
   void cmpxchg8 (Address adr);
   void cmpxchgl(Register reg, Address adr);
   void cmpxchgq(Register reg, Address adr);
   // Ordered Compare Scalar Double-Precision Floating-Point Values and set EFLAGS
   void comisd(XMMRegister dst, Address src);
   void comisd(XMMRegister dst, XMMRegister src);
   // Ordered Compare Scalar Single-Precision Floating-Point Values and set EFLAGS
   void comiss(XMMRegister dst, Address src);
   void comiss(XMMRegister dst, XMMRegister src);
   // Identify processor type and features
   void cpuid();
   // Convert Scalar Double-Precision Floating-Point Value to Scalar Single-Precision Floating-Point Value
   void cvtsd2ss(XMMRegister dst, XMMRegister src);
   void cvtsd2ss(XMMRegister dst, Address src);
   // Convert Doubleword Integer to Scalar Double-Precision Floating-Point Value
   void cvtsi2sdl(XMMRegister dst, Register src);
   void cvtsi2sdl(XMMRegister dst, Address src);
   void cvtsi2sdq(XMMRegister dst, Register src);
   void cvtsi2sdq(XMMRegister dst, Address src);
   // Convert Doubleword Integer to Scalar Single-Precision Floating-Point Value
   void cvtsi2ssl(XMMRegister dst, Register src);
   void cvtsi2ssl(XMMRegister dst, Address src);
   void cvtsi2ssq(XMMRegister dst, Register src);
   void cvtsi2ssq(XMMRegister dst, Address src);
   // Convert Packed Signed Doubleword Integers to Packed Double-Precision Floating-Point Value
   void cvtdq2pd(XMMRegister dst, XMMRegister src);
   // Convert Packed Signed Doubleword Integers to Packed Single-Precision Floating-Point Value
   void cvtdq2ps(XMMRegister dst, XMMRegister src);
   // Convert Scalar Single-Precision Floating-Point Value to Scalar Double-Precision Floating-Point Value
   void cvtss2sd(XMMRegister dst, XMMRegister src);
   void cvtss2sd(XMMRegister dst, Address src);
   // Convert with Truncation Scalar Double-Precision Floating-Point Value to Doubleword Integer
   void cvttsd2sil(Register dst, Address src);
   void cvttsd2sil(Register dst, XMMRegister src);
   void cvttsd2siq(Register dst, XMMRegister src);
   // Convert with Truncation Scalar Single-Precision Floating-Point Value to Doubleword Integer
   void cvttss2sil(Register dst, XMMRegister src);
   void cvttss2siq(Register dst, XMMRegister src);
   // Divide Scalar Double-Precision Floating-Point Values
   void divsd(XMMRegister dst, Address src);
   void divsd(XMMRegister dst, XMMRegister src);
   // Divide Scalar Single-Precision Floating-Point Values
   void divss(XMMRegister dst, Address src);
   void divss(XMMRegister dst, XMMRegister src);
   void emms();
   void fabs();
   void fadd(int i);
   void fadd_d(Address src);
   void fadd_s(Address src);
   // "Alternate" versions of x87 instructions place result down in FPU
   // stack instead of on TOS
   void fadda(int i); // "alternate" fadd
   void faddp(int i = 1);
   void fchs();
   void fcom(int i);
   void fcomp(int i = 1);
   void fcomp_d(Address src);
   void fcomp_s(Address src);
   void fcompp();
   void fcos();
   void fdecstp();
   void fdiv(int i);
   void fdiv_d(Address src);
   void fdivr_s(Address src);
   void fdiva(int i);  // "alternate" fdiv
   void fdivp(int i = 1);
   void fdivr(int i);
   void fdivr_d(Address src);
   void fdiv_s(Address src);
   void fdivra(int i); // "alternate" reversed fdiv
   void fdivrp(int i = 1);
   void ffree(int i = 0);
   void fild_d(Address adr);
   void fild_s(Address adr);
   void fincstp();
   void finit();
   void fist_s (Address adr);
   void fistp_d(Address adr);
   void fistp_s(Address adr);
   void fld1();
   void fld_d(Address adr);
   void fld_s(Address adr);
   void fld_s(int index);
   void fld_x(Address adr);  // extended-precision (80-bit) format
   void fldcw(Address src);
   void fldenv(Address src);
   void fldlg2();
   void fldln2();
   void fldz();
   void flog();
   void flog10();
   void fmul(int i);
   void fmul_d(Address src);
   void fmul_s(Address src);
   void fmula(int i);  // "alternate" fmul
   void fmulp(int i = 1);
   void fnsave(Address dst);
   void fnstcw(Address src);
   void fnstsw_ax();
   void fprem();
   void fprem1();
   void frstor(Address src);
   void fsin();
   void fsqrt();
   void fst_d(Address adr);
   void fst_s(Address adr);
   void fstp_d(Address adr);
   void fstp_d(int index);
   void fstp_s(Address adr);
   void fstp_x(Address adr); // extended-precision (80-bit) format
   void fsub(int i);
   void fsub_d(Address src);
   void fsub_s(Address src);
   void fsuba(int i);  // "alternate" fsub
   void fsubp(int i = 1);
   void fsubr(int i);
   void fsubr_d(Address src);
   void fsubr_s(Address src);
   void fsubra(int i); // "alternate" reversed fsub
   void fsubrp(int i = 1);
   void ftan();
   void ftst();
   void fucomi(int i = 1);
   void fucomip(int i = 1);
   void fwait();
   void fxch(int i = 1);
   void fxrstor(Address src);
   void fxsave(Address dst);
   void fyl2x();
   void frndint();
   void f2xm1();
   void fldl2e();
   void hlt();
   void idivl(Register src);
   void divl(Register src); // Unsigned division
   void idivq(Register src);
   void imull(Register dst, Register src);
   void imull(Register dst, Register src, int value);
   void imulq(Register dst, Register src);
   void imulq(Register dst, Register src, int value);
   // jcc is the generic conditional branch generator to run-
   // time routines, jcc is used for branches to labels. jcc
   // takes a branch opcode (cc) and a label (L) and generates
   // either a backward branch or a forward branch and links it
   // to the label fixup chain. Usage:
   //
   // Label L;      // unbound label
   // jcc(cc, L);   // forward branch to unbound label
   // bind(L);      // bind label to the current pc
   // jcc(cc, L);   // backward branch to bound label
   // bind(L);      // illegal: a label may be bound only once
   //
   // Note: The same Label can be used for forward and backward branches
   // but it may be bound only once.
   void jcc(Condition cc, Label& L, bool maybe_short = true);
   // Conditional jump to a 8-bit offset to L.
   // WARNING: be very careful using this for forward jumps.  If the label is
   // not bound within an 8-bit offset of this instruction, a run-time error
   // will occur.
   void jccb(Condition cc, Label& L);
   void jmp(Address entry);    // pc <- entry
   // Label operations & relative jumps (PPUM Appendix D)
   void jmp(Label& L, bool maybe_short = true);   // unconditional jump to L
   void jmp(Register entry); // pc <- entry
   // Unconditional 8-bit offset jump to L.
   // WARNING: be very careful using this for forward jumps.  If the label is
   // not bound within an 8-bit offset of this instruction, a run-time error
   // will occur.
   void jmpb(Label& L);
   void ldmxcsr( Address src );
   void leal(Register dst, Address src);
   void leaq(Register dst, Address src);
   void lfence();
   void lock();
   void lzcntl(Register dst, Register src);
 #ifdef _LP64
   void lzcntq(Register dst, Register src);
 #endif
   enum Membar_mask_bits {
     StoreStore = 1 << 3,
     LoadStore  = 1 << 2,
     StoreLoad  = 1 << 1,
     LoadLoad   = 1 << 0
   };
   // Serializes memory and blows flags
   void membar(Membar_mask_bits order_constraint) {
     if (os::is_MP()) {
       // We only have to handle StoreLoad
       if (order_constraint & StoreLoad) {
         // All usable chips support "locked" instructions which suffice
         // as barriers, and are much faster than the alternative of
         // using cpuid instruction. We use here a locked add [esp],0.
         // This is conveniently otherwise a no-op except for blowing
         // flags.
         // Any change to this code may need to revisit other places in
         // the code where this idiom is used, in particular the
         // orderAccess code.
         lock();
         addl(Address(rsp, 0), 0);// Assert the lock# signal here
       }
     }
   }
   void mfence();
   // Moves
   void mov64(Register dst, int64_t imm64);
   void movb(Address dst, Register src);
   void movb(Address dst, int imm8);
   void movb(Register dst, Address src);
   void movdl(XMMRegister dst, Register src);
   void movdl(Register dst, XMMRegister src);
   void movdl(XMMRegister dst, Address src);
   void movdl(Address dst, XMMRegister src);
   // Move Double Quadword
   void movdq(XMMRegister dst, Register src);
   void movdq(Register dst, XMMRegister src);
   // Move Aligned Double Quadword
   void movdqa(XMMRegister dst, XMMRegister src);
   // Move Unaligned Double Quadword
   void movdqu(Address     dst, XMMRegister src);
   void movdqu(XMMRegister dst, Address src);
   void movdqu(XMMRegister dst, XMMRegister src);
   // Move Unaligned 256bit Vector
   void vmovdqu(Address dst, XMMRegister src);
   void vmovdqu(XMMRegister dst, Address src);
   void vmovdqu(XMMRegister dst, XMMRegister src);
   // Move lower 64bit to high 64bit in 128bit register
   void movlhps(XMMRegister dst, XMMRegister src);
   void movl(Register dst, int32_t imm32);
   void movl(Address dst, int32_t imm32);
   void movl(Register dst, Register src);
   void movl(Register dst, Address src);
   void movl(Address dst, Register src);
   // These dummies prevent using movl from converting a zero (like NULL) into Register
   // by giving the compiler two choices it can't resolve
   void movl(Address  dst, void* junk);
   void movl(Register dst, void* junk);
 #ifdef _LP64
   void movq(Register dst, Register src);
   void movq(Register dst, Address src);
   void movq(Address  dst, Register src);
 #endif
   void movq(Address     dst, MMXRegister src );
   void movq(MMXRegister dst, Address src );
 #ifdef _LP64
   // These dummies prevent using movq from converting a zero (like NULL) into Register
   // by giving the compiler two choices it can't resolve
   void movq(Address  dst, void* dummy);
   void movq(Register dst, void* dummy);
 #endif
   // Move Quadword
   void movq(Address     dst, XMMRegister src);
   void movq(XMMRegister dst, Address src);
   void movsbl(Register dst, Address src);
   void movsbl(Register dst, Register src);
 #ifdef _LP64
   void movsbq(Register dst, Address src);
   void movsbq(Register dst, Register src);
   // Move signed 32bit immediate to 64bit extending sign
   void movslq(Address  dst, int32_t imm64);
   void movslq(Register dst, int32_t imm64);
   void movslq(Register dst, Address src);
   void movslq(Register dst, Register src);
   void movslq(Register dst, void* src); // Dummy declaration to cause NULL to be ambiguous
 #endif
   void movswl(Register dst, Address src);
   void movswl(Register dst, Register src);
 #ifdef _LP64
   void movswq(Register dst, Address src);
   void movswq(Register dst, Register src);
 #endif
   void movw(Address dst, int imm16);
   void movw(Register dst, Address src);
   void movw(Address dst, Register src);
   void movzbl(Register dst, Address src);
   void movzbl(Register dst, Register src);
 #ifdef _LP64
   void movzbq(Register dst, Address src);
   void movzbq(Register dst, Register src);
 #endif
   void movzwl(Register dst, Address src);
   void movzwl(Register dst, Register src);
 #ifdef _LP64
   void movzwq(Register dst, Address src);
   void movzwq(Register dst, Register src);
 #endif
   void mull(Address src);
   void mull(Register src);
   // Multiply Scalar Double-Precision Floating-Point Values
   void mulsd(XMMRegister dst, Address src);
   void mulsd(XMMRegister dst, XMMRegister src);
   // Multiply Scalar Single-Precision Floating-Point Values
   void mulss(XMMRegister dst, Address src);
   void mulss(XMMRegister dst, XMMRegister src);
   void negl(Register dst);
 #ifdef _LP64
   void negq(Register dst);
 #endif
   void nop(int i = 1);
   void notl(Register dst);
 #ifdef _LP64
   void notq(Register dst);
 #endif
   void orl(Address dst, int32_t imm32);
   void orl(Register dst, int32_t imm32);
   void orl(Register dst, Address src);
   void orl(Register dst, Register src);
   void orq(Address dst, int32_t imm32);
   void orq(Register dst, int32_t imm32);
   void orq(Register dst, Address src);
   void orq(Register dst, Register src);
   // Pack with unsigned saturation
   void packuswb(XMMRegister dst, XMMRegister src);
   void packuswb(XMMRegister dst, Address src);
   void vpackuswb(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   // Pemutation of 64bit words
   void vpermq(XMMRegister dst, XMMRegister src, int imm8, bool vector256);
   // SSE4.2 string instructions
   void pcmpestri(XMMRegister xmm1, XMMRegister xmm2, int imm8);
   void pcmpestri(XMMRegister xmm1, Address src, int imm8);
   // SSE4.1 packed move
   void pmovzxbw(XMMRegister dst, XMMRegister src);
   void pmovzxbw(XMMRegister dst, Address src);
 #ifndef _LP64 // no 32bit push/pop on amd64
   void popl(Address dst);
 #endif
 #ifdef _LP64
   void popq(Address dst);
 #endif
   void popcntl(Register dst, Address src);
   void popcntl(Register dst, Register src);
 #ifdef _LP64
   void popcntq(Register dst, Address src);
   void popcntq(Register dst, Register src);
 #endif
   // Prefetches (SSE, SSE2, 3DNOW only)
   void prefetchnta(Address src);
   void prefetchr(Address src);
   void prefetcht0(Address src);
   void prefetcht1(Address src);
   void prefetcht2(Address src);
   void prefetchw(Address src);
   // Shuffle Bytes
   void pshufb(XMMRegister dst, XMMRegister src);
   void pshufb(XMMRegister dst, Address src);
   // Shuffle Packed Doublewords
   void pshufd(XMMRegister dst, XMMRegister src, int mode);
   void pshufd(XMMRegister dst, Address src,     int mode);
   // Shuffle Packed Low Words
   void pshuflw(XMMRegister dst, XMMRegister src, int mode);
   void pshuflw(XMMRegister dst, Address src,     int mode);
   // Shift Right by bytes Logical DoubleQuadword Immediate
   void psrldq(XMMRegister dst, int shift);
   // Logical Compare 128bit
   void ptest(XMMRegister dst, XMMRegister src);
   void ptest(XMMRegister dst, Address src);
   // Logical Compare 256bit
   void vptest(XMMRegister dst, XMMRegister src);
   void vptest(XMMRegister dst, Address src);
   // Interleave Low Bytes
   void punpcklbw(XMMRegister dst, XMMRegister src);
   void punpcklbw(XMMRegister dst, Address src);
   // Interleave Low Doublewords
   void punpckldq(XMMRegister dst, XMMRegister src);
   void punpckldq(XMMRegister dst, Address src);
   // Interleave Low Quadwords
   void punpcklqdq(XMMRegister dst, XMMRegister src);
 #ifndef _LP64 // no 32bit push/pop on amd64
   void pushl(Address src);
 #endif
   void pushq(Address src);
   void rcll(Register dst, int imm8);
   void rclq(Register dst, int imm8);
   void ret(int imm16);
   void sahf();
   void sarl(Register dst, int imm8);
   void sarl(Register dst);
   void sarq(Register dst, int imm8);
   void sarq(Register dst);
   void sbbl(Address dst, int32_t imm32);
   void sbbl(Register dst, int32_t imm32);
   void sbbl(Register dst, Address src);
   void sbbl(Register dst, Register src);
   void sbbq(Address dst, int32_t imm32);
   void sbbq(Register dst, int32_t imm32);
   void sbbq(Register dst, Address src);
   void sbbq(Register dst, Register src);
   void setb(Condition cc, Register dst);
   void shldl(Register dst, Register src);
   void shll(Register dst, int imm8);
   void shll(Register dst);
   void shlq(Register dst, int imm8);
   void shlq(Register dst);
   void shrdl(Register dst, Register src);
   void shrl(Register dst, int imm8);
   void shrl(Register dst);
   void shrq(Register dst, int imm8);
   void shrq(Register dst);
   void smovl(); // QQQ generic?
   // Compute Square Root of Scalar Double-Precision Floating-Point Value
   void sqrtsd(XMMRegister dst, Address src);
   void sqrtsd(XMMRegister dst, XMMRegister src);
   // Compute Square Root of Scalar Single-Precision Floating-Point Value
   void sqrtss(XMMRegister dst, Address src);
   void sqrtss(XMMRegister dst, XMMRegister src);
   void std();
   void stmxcsr( Address dst );
   void subl(Address dst, int32_t imm32);
   void subl(Address dst, Register src);
   void subl(Register dst, int32_t imm32);
   void subl(Register dst, Address src);
   void subl(Register dst, Register src);
   void subq(Address dst, int32_t imm32);
   void subq(Address dst, Register src);
   void subq(Register dst, int32_t imm32);
   void subq(Register dst, Address src);
   void subq(Register dst, Register src);
   // Force generation of a 4 byte immediate value even if it fits into 8bit
   void subl_imm32(Register dst, int32_t imm32);
   void subq_imm32(Register dst, int32_t imm32);
   // Subtract Scalar Double-Precision Floating-Point Values
   void subsd(XMMRegister dst, Address src);
   void subsd(XMMRegister dst, XMMRegister src);
   // Subtract Scalar Single-Precision Floating-Point Values
   void subss(XMMRegister dst, Address src);
   void subss(XMMRegister dst, XMMRegister src);
   void testb(Register dst, int imm8);
   void testl(Register dst, int32_t imm32);
   void testl(Register dst, Register src);
   void testl(Register dst, Address src);
   void testq(Register dst, int32_t imm32);
   void testq(Register dst, Register src);
   // Unordered Compare Scalar Double-Precision Floating-Point Values and set EFLAGS
   void ucomisd(XMMRegister dst, Address src);
   void ucomisd(XMMRegister dst, XMMRegister src);
   // Unordered Compare Scalar Single-Precision Floating-Point Values and set EFLAGS
   void ucomiss(XMMRegister dst, Address src);
   void ucomiss(XMMRegister dst, XMMRegister src);
   void xaddl(Address dst, Register src);
   void xaddq(Address dst, Register src);
   void xchgl(Register reg, Address adr);
   void xchgl(Register dst, Register src);
   void xchgq(Register reg, Address adr);
   void xchgq(Register dst, Register src);
   // Get Value of Extended Control Register
   void xgetbv();
   void xorl(Register dst, int32_t imm32);
   void xorl(Register dst, Address src);
   void xorl(Register dst, Register src);
   void xorq(Register dst, Address src);
   void xorq(Register dst, Register src);
   void set_byte_if_not_zero(Register dst); // sets reg to 1 if not zero, otherwise 0
   // AVX 3-operands scalar instructions (encoded with VEX prefix)
   void vaddsd(XMMRegister dst, XMMRegister nds, Address src);
   void vaddsd(XMMRegister dst, XMMRegister nds, XMMRegister src);
   void vaddss(XMMRegister dst, XMMRegister nds, Address src);
   void vaddss(XMMRegister dst, XMMRegister nds, XMMRegister src);
   void vdivsd(XMMRegister dst, XMMRegister nds, Address src);
   void vdivsd(XMMRegister dst, XMMRegister nds, XMMRegister src);
   void vdivss(XMMRegister dst, XMMRegister nds, Address src);
   void vdivss(XMMRegister dst, XMMRegister nds, XMMRegister src);
   void vmulsd(XMMRegister dst, XMMRegister nds, Address src);
   void vmulsd(XMMRegister dst, XMMRegister nds, XMMRegister src);
   void vmulss(XMMRegister dst, XMMRegister nds, Address src);
   void vmulss(XMMRegister dst, XMMRegister nds, XMMRegister src);
   void vsubsd(XMMRegister dst, XMMRegister nds, Address src);
   void vsubsd(XMMRegister dst, XMMRegister nds, XMMRegister src);
   void vsubss(XMMRegister dst, XMMRegister nds, Address src);
   void vsubss(XMMRegister dst, XMMRegister nds, XMMRegister src);
   //====================VECTOR ARITHMETIC=====================================
   // Add Packed Floating-Point Values
   void addpd(XMMRegister dst, XMMRegister src);
   void addps(XMMRegister dst, XMMRegister src);
   void vaddpd(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vaddps(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vaddpd(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   void vaddps(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   // Subtract Packed Floating-Point Values
   void subpd(XMMRegister dst, XMMRegister src);
   void subps(XMMRegister dst, XMMRegister src);
   void vsubpd(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vsubps(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vsubpd(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   void vsubps(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   // Multiply Packed Floating-Point Values
   void mulpd(XMMRegister dst, XMMRegister src);
   void mulps(XMMRegister dst, XMMRegister src);
   void vmulpd(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vmulps(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vmulpd(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   void vmulps(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   // Divide Packed Floating-Point Values
   void divpd(XMMRegister dst, XMMRegister src);
   void divps(XMMRegister dst, XMMRegister src);
   void vdivpd(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vdivps(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vdivpd(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   void vdivps(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   // Bitwise Logical AND of Packed Floating-Point Values
   void andpd(XMMRegister dst, XMMRegister src);
   void andps(XMMRegister dst, XMMRegister src);
   void vandpd(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vandps(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vandpd(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   void vandps(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   // Bitwise Logical XOR of Packed Floating-Point Values
   void xorpd(XMMRegister dst, XMMRegister src);
   void xorps(XMMRegister dst, XMMRegister src);
   void vxorpd(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vxorps(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vxorpd(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   void vxorps(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   // Add packed integers
   void paddb(XMMRegister dst, XMMRegister src);
   void paddw(XMMRegister dst, XMMRegister src);
   void paddd(XMMRegister dst, XMMRegister src);
   void paddq(XMMRegister dst, XMMRegister src);
   void vpaddb(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vpaddw(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vpaddd(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vpaddq(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vpaddb(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   void vpaddw(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   void vpaddd(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   void vpaddq(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   // Sub packed integers
   void psubb(XMMRegister dst, XMMRegister src);
   void psubw(XMMRegister dst, XMMRegister src);
   void psubd(XMMRegister dst, XMMRegister src);
   void psubq(XMMRegister dst, XMMRegister src);
   void vpsubb(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vpsubw(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vpsubd(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vpsubq(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vpsubb(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   void vpsubw(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   void vpsubd(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   void vpsubq(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   // Multiply packed integers (only shorts and ints)
   void pmullw(XMMRegister dst, XMMRegister src);
   void pmulld(XMMRegister dst, XMMRegister src);
   void vpmullw(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vpmulld(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vpmullw(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   void vpmulld(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   // Shift left packed integers
   void psllw(XMMRegister dst, int shift);
   void pslld(XMMRegister dst, int shift);
   void psllq(XMMRegister dst, int shift);
   void psllw(XMMRegister dst, XMMRegister shift);
   void pslld(XMMRegister dst, XMMRegister shift);
   void psllq(XMMRegister dst, XMMRegister shift);
   void vpsllw(XMMRegister dst, XMMRegister src, int shift, bool vector256);
   void vpslld(XMMRegister dst, XMMRegister src, int shift, bool vector256);
   void vpsllq(XMMRegister dst, XMMRegister src, int shift, bool vector256);
   void vpsllw(XMMRegister dst, XMMRegister src, XMMRegister shift, bool vector256);
   void vpslld(XMMRegister dst, XMMRegister src, XMMRegister shift, bool vector256);
   void vpsllq(XMMRegister dst, XMMRegister src, XMMRegister shift, bool vector256);
   // Logical shift right packed integers
   void psrlw(XMMRegister dst, int shift);
   void psrld(XMMRegister dst, int shift);
   void psrlq(XMMRegister dst, int shift);
   void psrlw(XMMRegister dst, XMMRegister shift);
   void psrld(XMMRegister dst, XMMRegister shift);
   void psrlq(XMMRegister dst, XMMRegister shift);
   void vpsrlw(XMMRegister dst, XMMRegister src, int shift, bool vector256);
   void vpsrld(XMMRegister dst, XMMRegister src, int shift, bool vector256);
   void vpsrlq(XMMRegister dst, XMMRegister src, int shift, bool vector256);
   void vpsrlw(XMMRegister dst, XMMRegister src, XMMRegister shift, bool vector256);
   void vpsrld(XMMRegister dst, XMMRegister src, XMMRegister shift, bool vector256);
   void vpsrlq(XMMRegister dst, XMMRegister src, XMMRegister shift, bool vector256);
   // Arithmetic shift right packed integers (only shorts and ints, no instructions for longs)
   void psraw(XMMRegister dst, int shift);
   void psrad(XMMRegister dst, int shift);
   void psraw(XMMRegister dst, XMMRegister shift);
   void psrad(XMMRegister dst, XMMRegister shift);
   void vpsraw(XMMRegister dst, XMMRegister src, int shift, bool vector256);
   void vpsrad(XMMRegister dst, XMMRegister src, int shift, bool vector256);
   void vpsraw(XMMRegister dst, XMMRegister src, XMMRegister shift, bool vector256);
   void vpsrad(XMMRegister dst, XMMRegister src, XMMRegister shift, bool vector256);
   // And packed integers
   void pand(XMMRegister dst, XMMRegister src);
   void vpand(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vpand(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   // Or packed integers
   void por(XMMRegister dst, XMMRegister src);
   void vpor(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vpor(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   // Xor packed integers
   void pxor(XMMRegister dst, XMMRegister src);
   void vpxor(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256);
   void vpxor(XMMRegister dst, XMMRegister nds, Address src, bool vector256);
   // Copy low 128bit into high 128bit of YMM registers.
   void vinsertf128h(XMMRegister dst, XMMRegister nds, XMMRegister src);
   void vinserti128h(XMMRegister dst, XMMRegister nds, XMMRegister src);
   // Load/store high 128bit of YMM registers which does not destroy other half.
   void vinsertf128h(XMMRegister dst, Address src);
   void vinserti128h(XMMRegister dst, Address src);
   void vextractf128h(Address dst, XMMRegister src);
   void vextracti128h(Address dst, XMMRegister src);
   // duplicate 4-bytes integer data from src into 8 locations in dest
   void vpbroadcastd(XMMRegister dst, XMMRegister src);
   // AVX instruction which is used to clear upper 128 bits of YMM registers and
   // to avoid transaction penalty between AVX and SSE states. There is no
   // penalty if legacy SSE instructions are encoded using VEX prefix because
   // they always clear upper 128 bits. It should be used before calling
   // runtime code and native libraries.
   void vzeroupper();
  protected:
   // Next instructions require address alignment 16 bytes SSE mode.
   // They should be called only from corresponding MacroAssembler instructions.
   void andpd(XMMRegister dst, Address src);
   void andps(XMMRegister dst, Address src);
   void xorpd(XMMRegister dst, Address src);
   void xorps(XMMRegister dst, Address src);
 };
 #endif // CPU_X86_VM_ASSEMBLER_X86_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/x86/vm/assembler_x86.hpp@cf8470eaf7e5 (annotated)

src/cpu/x86/vm/assembler_x86.hpp