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 /*

  * 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.

  *

  */

 #include "precompiled.hpp"

 #include "interpreter/interpreter.hpp"

 #include "interpreter/interpreterRuntime.hpp"

 #include "interpreter/templateTable.hpp"

 #include "memory/universe.inline.hpp"

 #include "oops/methodData.hpp"

 #include "oops/objArrayKlass.hpp"

 #include "oops/oop.inline.hpp"

 #include "prims/methodHandles.hpp"

 #include "runtime/sharedRuntime.hpp"

 #include "runtime/stubRoutines.hpp"

 #include "runtime/synchronizer.hpp"

 #include "utilities/macros.hpp"

 #ifndef CC_INTERP

 #define __ _masm->

 // Misc helpers

 // Do an oop store like *(base + index + offset) = val

 // index can be noreg,

 static void do_oop_store(InterpreterMacroAssembler* _masm,

                          Register base,

                          Register index,

                          int offset,

                          Register val,

                          Register tmp,

                          BarrierSet::Name barrier,

                          bool precise) {

   assert(tmp != val && tmp != base && tmp != index, "register collision");

   assert(index == noreg || offset == 0, "only one offset");

   switch (barrier) {

 #if INCLUDE_ALL_GCS

     case BarrierSet::G1SATBCT:

     case BarrierSet::G1SATBCTLogging:

       {

         // Load and record the previous value.

         __ g1_write_barrier_pre(base, index, offset,

                                 noreg /* pre_val */,

                                 tmp, true /*preserve_o_regs*/);

         if (index == noreg ) {

           assert(Assembler::is_simm13(offset), "fix this code");

           __ store_heap_oop(val, base, offset);

         } else {

           __ store_heap_oop(val, base, index);

         }

         // No need for post barrier if storing NULL

         if (val != G0) {

           if (precise) {

             if (index == noreg) {

               __ add(base, offset, base);

             } else {

               __ add(base, index, base);

             }

           }

           __ g1_write_barrier_post(base, val, tmp);

         }

       }

       break;

 #endif // INCLUDE_ALL_GCS

     case BarrierSet::CardTableModRef:

     case BarrierSet::CardTableExtension:

       {

         if (index == noreg ) {

           assert(Assembler::is_simm13(offset), "fix this code");

           __ store_heap_oop(val, base, offset);

         } else {

           __ store_heap_oop(val, base, index);

         }

         // No need for post barrier if storing NULL

         if (val != G0) {

           if (precise) {

             if (index == noreg) {

               __ add(base, offset, base);

             } else {

               __ add(base, index, base);

             }

           }

           __ card_write_barrier_post(base, val, tmp);

         }

       }

       break;

     case BarrierSet::ModRef:

     case BarrierSet::Other:

       ShouldNotReachHere();

       break;

     default      :

       ShouldNotReachHere();

   }

 }

 //----------------------------------------------------------------------------------------------------

 // Platform-dependent initialization

 void TemplateTable::pd_initialize() {

   // (none)

 }

 //----------------------------------------------------------------------------------------------------

 // Condition conversion

 Assembler::Condition ccNot(TemplateTable::Condition cc) {

   switch (cc) {

     case TemplateTable::equal        : return Assembler::notEqual;

     case TemplateTable::not_equal    : return Assembler::equal;

     case TemplateTable::less         : return Assembler::greaterEqual;

     case TemplateTable::less_equal   : return Assembler::greater;

     case TemplateTable::greater      : return Assembler::lessEqual;

     case TemplateTable::greater_equal: return Assembler::less;

   }

   ShouldNotReachHere();

   return Assembler::zero;

 }

 //----------------------------------------------------------------------------------------------------

 // Miscelaneous helper routines

 Address TemplateTable::at_bcp(int offset) {

   assert(_desc->uses_bcp(), "inconsistent uses_bcp information");

   return Address(Lbcp, offset);

 }

 void TemplateTable::patch_bytecode(Bytecodes::Code bc, Register bc_reg,

                                    Register temp_reg, bool load_bc_into_bc_reg/*=true*/,

                                    int byte_no) {

   // With sharing on, may need to test Method* flag.

   if (!RewriteBytecodes)  return;

   Label L_patch_done;

   switch (bc) {

   case Bytecodes::_fast_aputfield:

   case Bytecodes::_fast_bputfield:

   case Bytecodes::_fast_cputfield:

   case Bytecodes::_fast_dputfield:

   case Bytecodes::_fast_fputfield:

   case Bytecodes::_fast_iputfield:

   case Bytecodes::_fast_lputfield:

   case Bytecodes::_fast_sputfield:

     {

       // We skip bytecode quickening for putfield instructions when

       // the put_code written to the constant pool cache is zero.

       // This is required so that every execution of this instruction

       // calls out to InterpreterRuntime::resolve_get_put to do

       // additional, required work.

       assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range");

       assert(load_bc_into_bc_reg, "we use bc_reg as temp");

       __ get_cache_and_index_and_bytecode_at_bcp(bc_reg, temp_reg, temp_reg, byte_no, 1);

       __ set(bc, bc_reg);

       __ cmp_and_br_short(temp_reg, 0, Assembler::equal, Assembler::pn, L_patch_done);  // don't patch

     }

     break;

   default:

     assert(byte_no == -1, "sanity");

     if (load_bc_into_bc_reg) {

       __ set(bc, bc_reg);

     }

   }

   if (JvmtiExport::can_post_breakpoint()) {

     Label L_fast_patch;

     __ ldub(at_bcp(0), temp_reg);

     __ cmp_and_br_short(temp_reg, Bytecodes::_breakpoint, Assembler::notEqual, Assembler::pt, L_fast_patch);

     // perform the quickening, slowly, in the bowels of the breakpoint table

     __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::set_original_bytecode_at), Lmethod, Lbcp, bc_reg);

     __ ba_short(L_patch_done);

     __ bind(L_fast_patch);

   }

 #ifdef ASSERT

   Bytecodes::Code orig_bytecode =  Bytecodes::java_code(bc);

   Label L_okay;

   __ ldub(at_bcp(0), temp_reg);

   __ cmp(temp_reg, orig_bytecode);

   __ br(Assembler::equal, false, Assembler::pt, L_okay);

   __ delayed()->cmp(temp_reg, bc_reg);

   __ br(Assembler::equal, false, Assembler::pt, L_okay);

   __ delayed()->nop();

   __ stop("patching the wrong bytecode");

   __ bind(L_okay);

 #endif

   // patch bytecode

   __ stb(bc_reg, at_bcp(0));

   __ bind(L_patch_done);

 }

 //----------------------------------------------------------------------------------------------------

 // Individual instructions

 void TemplateTable::nop() {

   transition(vtos, vtos);

   // nothing to do

 }

 void TemplateTable::shouldnotreachhere() {

   transition(vtos, vtos);

   __ stop("shouldnotreachhere bytecode");

 }

 void TemplateTable::aconst_null() {

   transition(vtos, atos);

   __ clr(Otos_i);

 }

 void TemplateTable::iconst(int value) {

   transition(vtos, itos);

   __ set(value, Otos_i);

 }

 void TemplateTable::lconst(int value) {

   transition(vtos, ltos);

   assert(value >= 0, "check this code");

 #ifdef _LP64

   __ set(value, Otos_l);

 #else

   __ set(value, Otos_l2);

   __ clr( Otos_l1);

 #endif

 }

 void TemplateTable::fconst(int value) {

   transition(vtos, ftos);

   static float zero = 0.0, one = 1.0, two = 2.0;

   float* p;

   switch( value ) {

    default: ShouldNotReachHere();

    case 0:  p = &zero;  break;

    case 1:  p = &one;   break;

    case 2:  p = &two;   break;

   }

   AddressLiteral a(p);

   __ sethi(a, G3_scratch);

   __ ldf(FloatRegisterImpl::S, G3_scratch, a.low10(), Ftos_f);

 }

 void TemplateTable::dconst(int value) {

   transition(vtos, dtos);

   static double zero = 0.0, one = 1.0;

   double* p;

   switch( value ) {

    default: ShouldNotReachHere();

    case 0:  p = &zero;  break;

    case 1:  p = &one;   break;

   }

   AddressLiteral a(p);

   __ sethi(a, G3_scratch);

   __ ldf(FloatRegisterImpl::D, G3_scratch, a.low10(), Ftos_d);

 }

 // %%%%% Should factore most snippet templates across platforms

 void TemplateTable::bipush() {

   transition(vtos, itos);

   __ ldsb( at_bcp(1), Otos_i );

 }

 void TemplateTable::sipush() {

   transition(vtos, itos);

   __ get_2_byte_integer_at_bcp(1, G3_scratch, Otos_i, InterpreterMacroAssembler::Signed);

 }

 void TemplateTable::ldc(bool wide) {

   transition(vtos, vtos);

   Label call_ldc, notInt, isString, notString, notClass, exit;

   if (wide) {

     __ get_2_byte_integer_at_bcp(1, G3_scratch, O1, InterpreterMacroAssembler::Unsigned);

   } else {

     __ ldub(Lbcp, 1, O1);

   }

   __ get_cpool_and_tags(O0, O2);

   const int base_offset = ConstantPool::header_size() * wordSize;

   const int tags_offset = Array<u1>::base_offset_in_bytes();

   // get type from tags

   __ add(O2, tags_offset, O2);

   __ ldub(O2, O1, O2);

   // unresolved class? If so, must resolve

   __ cmp_and_brx_short(O2, JVM_CONSTANT_UnresolvedClass, Assembler::equal, Assembler::pt, call_ldc);

   // unresolved class in error state

   __ cmp_and_brx_short(O2, JVM_CONSTANT_UnresolvedClassInError, Assembler::equal, Assembler::pn, call_ldc);

   __ cmp(O2, JVM_CONSTANT_Class);      // need to call vm to get java mirror of the class

   __ brx(Assembler::notEqual, true, Assembler::pt, notClass);

   __ delayed()->add(O0, base_offset, O0);

   __ bind(call_ldc);

   __ set(wide, O1);

   call_VM(Otos_i, CAST_FROM_FN_PTR(address, InterpreterRuntime::ldc), O1);

   __ push(atos);

   __ ba_short(exit);

   __ bind(notClass);

  // __ add(O0, base_offset, O0);

   __ sll(O1, LogBytesPerWord, O1);

   __ cmp(O2, JVM_CONSTANT_Integer);

   __ brx(Assembler::notEqual, true, Assembler::pt, notInt);

   __ delayed()->cmp(O2, JVM_CONSTANT_String);

   __ ld(O0, O1, Otos_i);

   __ push(itos);

   __ ba_short(exit);

   __ bind(notInt);

  // __ cmp(O2, JVM_CONSTANT_String);

   __ brx(Assembler::notEqual, true, Assembler::pt, notString);

   __ delayed()->ldf(FloatRegisterImpl::S, O0, O1, Ftos_f);

   __ bind(isString);

   __ stop("string should be rewritten to fast_aldc");

   __ ba_short(exit);

   __ bind(notString);

  // __ ldf(FloatRegisterImpl::S, O0, O1, Ftos_f);

   __ push(ftos);

   __ bind(exit);

 }

 // Fast path for caching oop constants.

 // %%% We should use this to handle Class and String constants also.

 // %%% It will simplify the ldc/primitive path considerably.

 void TemplateTable::fast_aldc(bool wide) {

   transition(vtos, atos);

   int index_size = wide ? sizeof(u2) : sizeof(u1);

   Label resolved;

   // We are resolved if the resolved reference cache entry contains a

   // non-null object (CallSite, etc.)

   assert_different_registers(Otos_i, G3_scratch);

   __ get_cache_index_at_bcp(Otos_i, G3_scratch, 1, index_size);  // load index => G3_scratch

   __ load_resolved_reference_at_index(Otos_i, G3_scratch);

   __ tst(Otos_i);

   __ br(Assembler::notEqual, false, Assembler::pt, resolved);

   __ delayed()->set((int)bytecode(), O1);

   address entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc);

   // first time invocation - must resolve first

   __ call_VM(Otos_i, entry, O1);

   __ bind(resolved);

   __ verify_oop(Otos_i);

 }

 void TemplateTable::ldc2_w() {

   transition(vtos, vtos);

   Label Long, exit;

   __ get_2_byte_integer_at_bcp(1, G3_scratch, O1, InterpreterMacroAssembler::Unsigned);

   __ get_cpool_and_tags(O0, O2);

   const int base_offset = ConstantPool::header_size() * wordSize;

   const int tags_offset = Array<u1>::base_offset_in_bytes();

   // get type from tags

   __ add(O2, tags_offset, O2);

   __ ldub(O2, O1, O2);

   __ sll(O1, LogBytesPerWord, O1);

   __ add(O0, O1, G3_scratch);

   __ cmp_and_brx_short(O2, JVM_CONSTANT_Double, Assembler::notEqual, Assembler::pt, Long);

   // A double can be placed at word-aligned locations in the constant pool.

   // Check out Conversions.java for an example.

   // Also ConstantPool::header_size() is 20, which makes it very difficult

   // to double-align double on the constant pool.  SG, 11/7/97

 #ifdef _LP64

   __ ldf(FloatRegisterImpl::D, G3_scratch, base_offset, Ftos_d);

 #else

   FloatRegister f = Ftos_d;

   __ ldf(FloatRegisterImpl::S, G3_scratch, base_offset, f);

   __ ldf(FloatRegisterImpl::S, G3_scratch, base_offset + sizeof(jdouble)/2,

          f->successor());

 #endif

   __ push(dtos);

   __ ba_short(exit);

   __ bind(Long);

 #ifdef _LP64

   __ ldx(G3_scratch, base_offset, Otos_l);

 #else

   __ ld(G3_scratch, base_offset, Otos_l);

   __ ld(G3_scratch, base_offset + sizeof(jlong)/2, Otos_l->successor());

 #endif

   __ push(ltos);

   __ bind(exit);

 }

 void TemplateTable::locals_index(Register reg, int offset) {

   __ ldub( at_bcp(offset), reg );

 }

 void TemplateTable::locals_index_wide(Register reg) {

   // offset is 2, not 1, because Lbcp points to wide prefix code

   __ get_2_byte_integer_at_bcp(2, G4_scratch, reg, InterpreterMacroAssembler::Unsigned);

 }

 void TemplateTable::iload() {

   transition(vtos, itos);

   // Rewrite iload,iload  pair into fast_iload2

   //         iload,caload pair into fast_icaload

   if (RewriteFrequentPairs) {

     Label rewrite, done;

     // get next byte

     __ ldub(at_bcp(Bytecodes::length_for(Bytecodes::_iload)), G3_scratch);

     // if _iload, wait to rewrite to iload2.  We only want to rewrite the

     // last two iloads in a pair.  Comparing against fast_iload means that

     // the next bytecode is neither an iload or a caload, and therefore

     // an iload pair.

     __ cmp_and_br_short(G3_scratch, (int)Bytecodes::_iload, Assembler::equal, Assembler::pn, done);

     __ cmp(G3_scratch, (int)Bytecodes::_fast_iload);

     __ br(Assembler::equal, false, Assembler::pn, rewrite);

     __ delayed()->set(Bytecodes::_fast_iload2, G4_scratch);

     __ cmp(G3_scratch, (int)Bytecodes::_caload);

     __ br(Assembler::equal, false, Assembler::pn, rewrite);

     __ delayed()->set(Bytecodes::_fast_icaload, G4_scratch);

     __ set(Bytecodes::_fast_iload, G4_scratch);  // don't check again

     // rewrite

     // G4_scratch: fast bytecode

     __ bind(rewrite);

     patch_bytecode(Bytecodes::_iload, G4_scratch, G3_scratch, false);

     __ bind(done);

   }

   // Get the local value into tos

   locals_index(G3_scratch);

   __ access_local_int( G3_scratch, Otos_i );

 }

 void TemplateTable::fast_iload2() {

   transition(vtos, itos);

   locals_index(G3_scratch);

   __ access_local_int( G3_scratch, Otos_i );

   __ push_i();

   locals_index(G3_scratch, 3);  // get next bytecode's local index.

   __ access_local_int( G3_scratch, Otos_i );

 }

 void TemplateTable::fast_iload() {

   transition(vtos, itos);

   locals_index(G3_scratch);

   __ access_local_int( G3_scratch, Otos_i );

 }

 void TemplateTable::lload() {

   transition(vtos, ltos);

   locals_index(G3_scratch);

   __ access_local_long( G3_scratch, Otos_l );

 }

 void TemplateTable::fload() {

   transition(vtos, ftos);

   locals_index(G3_scratch);

   __ access_local_float( G3_scratch, Ftos_f );

 }

 void TemplateTable::dload() {

   transition(vtos, dtos);

   locals_index(G3_scratch);

   __ access_local_double( G3_scratch, Ftos_d );

 }

 void TemplateTable::aload() {

   transition(vtos, atos);

   locals_index(G3_scratch);

   __ access_local_ptr( G3_scratch, Otos_i);

 }

 void TemplateTable::wide_iload() {

   transition(vtos, itos);

   locals_index_wide(G3_scratch);

   __ access_local_int( G3_scratch, Otos_i );

 }

 void TemplateTable::wide_lload() {

   transition(vtos, ltos);

   locals_index_wide(G3_scratch);

   __ access_local_long( G3_scratch, Otos_l );

 }

 void TemplateTable::wide_fload() {

   transition(vtos, ftos);

   locals_index_wide(G3_scratch);

   __ access_local_float( G3_scratch, Ftos_f );

 }

 void TemplateTable::wide_dload() {

   transition(vtos, dtos);

   locals_index_wide(G3_scratch);

   __ access_local_double( G3_scratch, Ftos_d );

 }

 void TemplateTable::wide_aload() {

   transition(vtos, atos);

   locals_index_wide(G3_scratch);

   __ access_local_ptr( G3_scratch, Otos_i );

   __ verify_oop(Otos_i);

 }

 void TemplateTable::iaload() {

   transition(itos, itos);

   // Otos_i: index

   // tos: array

   __ index_check(O2, Otos_i, LogBytesPerInt, G3_scratch, O3);

   __ ld(O3, arrayOopDesc::base_offset_in_bytes(T_INT), Otos_i);

 }

 void TemplateTable::laload() {

   transition(itos, ltos);

   // Otos_i: index

   // O2: array

   __ index_check(O2, Otos_i, LogBytesPerLong, G3_scratch, O3);

   __ ld_long(O3, arrayOopDesc::base_offset_in_bytes(T_LONG), Otos_l);

 }

 void TemplateTable::faload() {

   transition(itos, ftos);

   // Otos_i: index

   // O2: array

   __ index_check(O2, Otos_i, LogBytesPerInt, G3_scratch, O3);

   __ ldf(FloatRegisterImpl::S, O3, arrayOopDesc::base_offset_in_bytes(T_FLOAT), Ftos_f);

 }

 void TemplateTable::daload() {

   transition(itos, dtos);

   // Otos_i: index

   // O2: array

   __ index_check(O2, Otos_i, LogBytesPerLong, G3_scratch, O3);

   __ ldf(FloatRegisterImpl::D, O3, arrayOopDesc::base_offset_in_bytes(T_DOUBLE), Ftos_d);

 }

 void TemplateTable::aaload() {

   transition(itos, atos);

   // Otos_i: index

   // tos: array

   __ index_check(O2, Otos_i, UseCompressedOops ? 2 : LogBytesPerWord, G3_scratch, O3);

   __ load_heap_oop(O3, arrayOopDesc::base_offset_in_bytes(T_OBJECT), Otos_i);

   __ verify_oop(Otos_i);

 }

 void TemplateTable::baload() {

   transition(itos, itos);

   // Otos_i: index

   // tos: array

   __ index_check(O2, Otos_i, 0, G3_scratch, O3);

   __ ldsb(O3, arrayOopDesc::base_offset_in_bytes(T_BYTE), Otos_i);

 }

 void TemplateTable::caload() {

   transition(itos, itos);

   // Otos_i: index

   // tos: array

   __ index_check(O2, Otos_i, LogBytesPerShort, G3_scratch, O3);

   __ lduh(O3, arrayOopDesc::base_offset_in_bytes(T_CHAR), Otos_i);

 }

 void TemplateTable::fast_icaload() {

   transition(vtos, itos);

   // Otos_i: index

   // tos: array

   locals_index(G3_scratch);

   __ access_local_int( G3_scratch, Otos_i );

   __ index_check(O2, Otos_i, LogBytesPerShort, G3_scratch, O3);

   __ lduh(O3, arrayOopDesc::base_offset_in_bytes(T_CHAR), Otos_i);

 }

 void TemplateTable::saload() {

   transition(itos, itos);

   // Otos_i: index

   // tos: array

   __ index_check(O2, Otos_i, LogBytesPerShort, G3_scratch, O3);

   __ ldsh(O3, arrayOopDesc::base_offset_in_bytes(T_SHORT), Otos_i);

 }

 void TemplateTable::iload(int n) {

   transition(vtos, itos);

   __ ld( Llocals, Interpreter::local_offset_in_bytes(n), Otos_i );

 }

 void TemplateTable::lload(int n) {

   transition(vtos, ltos);

   assert(n+1 < Argument::n_register_parameters, "would need more code");

   __ load_unaligned_long(Llocals, Interpreter::local_offset_in_bytes(n+1), Otos_l);

 }

 void TemplateTable::fload(int n) {

   transition(vtos, ftos);

   assert(n < Argument::n_register_parameters, "would need more code");

   __ ldf( FloatRegisterImpl::S, Llocals, Interpreter::local_offset_in_bytes(n),     Ftos_f );

 }

 void TemplateTable::dload(int n) {

   transition(vtos, dtos);

   FloatRegister dst = Ftos_d;

   __ load_unaligned_double(Llocals, Interpreter::local_offset_in_bytes(n+1), dst);

 }

 void TemplateTable::aload(int n) {

   transition(vtos, atos);

   __ ld_ptr( Llocals, Interpreter::local_offset_in_bytes(n), Otos_i );

 }

 void TemplateTable::aload_0() {

   transition(vtos, atos);

   // According to bytecode histograms, the pairs:

   //

   // _aload_0, _fast_igetfield (itos)

   // _aload_0, _fast_agetfield (atos)

   // _aload_0, _fast_fgetfield (ftos)

   //

   // occur frequently. If RewriteFrequentPairs is set, the (slow) _aload_0

   // bytecode checks the next bytecode and then rewrites the current

   // bytecode into a pair bytecode; otherwise it rewrites the current

   // bytecode into _fast_aload_0 that doesn't do the pair check anymore.

   //

   if (RewriteFrequentPairs) {

     Label rewrite, done;

     // get next byte

     __ ldub(at_bcp(Bytecodes::length_for(Bytecodes::_aload_0)), G3_scratch);

     // do actual aload_0

     aload(0);

     // if _getfield then wait with rewrite

     __ cmp_and_br_short(G3_scratch, (int)Bytecodes::_getfield, Assembler::equal, Assembler::pn, done);

     // if _igetfield then rewrite to _fast_iaccess_0

     assert(Bytecodes::java_code(Bytecodes::_fast_iaccess_0) == Bytecodes::_aload_0, "adjust fast bytecode def");

     __ cmp(G3_scratch, (int)Bytecodes::_fast_igetfield);

     __ br(Assembler::equal, false, Assembler::pn, rewrite);

     __ delayed()->set(Bytecodes::_fast_iaccess_0, G4_scratch);

     // if _agetfield then rewrite to _fast_aaccess_0

     assert(Bytecodes::java_code(Bytecodes::_fast_aaccess_0) == Bytecodes::_aload_0, "adjust fast bytecode def");

     __ cmp(G3_scratch, (int)Bytecodes::_fast_agetfield);

     __ br(Assembler::equal, false, Assembler::pn, rewrite);

     __ delayed()->set(Bytecodes::_fast_aaccess_0, G4_scratch);

     // if _fgetfield then rewrite to _fast_faccess_0

     assert(Bytecodes::java_code(Bytecodes::_fast_faccess_0) == Bytecodes::_aload_0, "adjust fast bytecode def");

     __ cmp(G3_scratch, (int)Bytecodes::_fast_fgetfield);

     __ br(Assembler::equal, false, Assembler::pn, rewrite);

     __ delayed()->set(Bytecodes::_fast_faccess_0, G4_scratch);

     // else rewrite to _fast_aload0

     assert(Bytecodes::java_code(Bytecodes::_fast_aload_0) == Bytecodes::_aload_0, "adjust fast bytecode def");

     __ set(Bytecodes::_fast_aload_0, G4_scratch);

     // rewrite

     // G4_scratch: fast bytecode

     __ bind(rewrite);

     patch_bytecode(Bytecodes::_aload_0, G4_scratch, G3_scratch, false);

     __ bind(done);

   } else {

     aload(0);

   }

 }

 void TemplateTable::istore() {

   transition(itos, vtos);

   locals_index(G3_scratch);

   __ store_local_int( G3_scratch, Otos_i );

 }

 void TemplateTable::lstore() {

   transition(ltos, vtos);

   locals_index(G3_scratch);

   __ store_local_long( G3_scratch, Otos_l );

 }

 void TemplateTable::fstore() {

   transition(ftos, vtos);

   locals_index(G3_scratch);

   __ store_local_float( G3_scratch, Ftos_f );

 }

 void TemplateTable::dstore() {

   transition(dtos, vtos);

   locals_index(G3_scratch);

   __ store_local_double( G3_scratch, Ftos_d );

 }

 void TemplateTable::astore() {

   transition(vtos, vtos);

   __ load_ptr(0, Otos_i);

   __ inc(Lesp, Interpreter::stackElementSize);

   __ verify_oop_or_return_address(Otos_i, G3_scratch);

   locals_index(G3_scratch);

   __ store_local_ptr(G3_scratch, Otos_i);

 }

 void TemplateTable::wide_istore() {

   transition(vtos, vtos);

   __ pop_i();

   locals_index_wide(G3_scratch);

   __ store_local_int( G3_scratch, Otos_i );

 }

 void TemplateTable::wide_lstore() {

   transition(vtos, vtos);

   __ pop_l();

   locals_index_wide(G3_scratch);

   __ store_local_long( G3_scratch, Otos_l );

 }

 void TemplateTable::wide_fstore() {

   transition(vtos, vtos);

   __ pop_f();

   locals_index_wide(G3_scratch);

   __ store_local_float( G3_scratch, Ftos_f );

 }

 void TemplateTable::wide_dstore() {

   transition(vtos, vtos);

   __ pop_d();

   locals_index_wide(G3_scratch);

   __ store_local_double( G3_scratch, Ftos_d );

 }

 void TemplateTable::wide_astore() {

   transition(vtos, vtos);

   __ load_ptr(0, Otos_i);

   __ inc(Lesp, Interpreter::stackElementSize);

   __ verify_oop_or_return_address(Otos_i, G3_scratch);

   locals_index_wide(G3_scratch);

   __ store_local_ptr(G3_scratch, Otos_i);

 }

 void TemplateTable::iastore() {

   transition(itos, vtos);

   __ pop_i(O2); // index

   // Otos_i: val

   // O3: array

   __ index_check(O3, O2, LogBytesPerInt, G3_scratch, O2);

   __ st(Otos_i, O2, arrayOopDesc::base_offset_in_bytes(T_INT));

 }

 void TemplateTable::lastore() {

   transition(ltos, vtos);

   __ pop_i(O2); // index

   // Otos_l: val

   // O3: array

   __ index_check(O3, O2, LogBytesPerLong, G3_scratch, O2);

   __ st_long(Otos_l, O2, arrayOopDesc::base_offset_in_bytes(T_LONG));

 }

 void TemplateTable::fastore() {

   transition(ftos, vtos);

   __ pop_i(O2); // index

   // Ftos_f: val

   // O3: array

   __ index_check(O3, O2, LogBytesPerInt, G3_scratch, O2);

   __ stf(FloatRegisterImpl::S, Ftos_f, O2, arrayOopDesc::base_offset_in_bytes(T_FLOAT));

 }

 void TemplateTable::dastore() {

   transition(dtos, vtos);

   __ pop_i(O2); // index

   // Fos_d: val

   // O3: array

   __ index_check(O3, O2, LogBytesPerLong, G3_scratch, O2);

   __ stf(FloatRegisterImpl::D, Ftos_d, O2, arrayOopDesc::base_offset_in_bytes(T_DOUBLE));

 }

 void TemplateTable::aastore() {

   Label store_ok, is_null, done;

   transition(vtos, vtos);

   __ ld_ptr(Lesp, Interpreter::expr_offset_in_bytes(0), Otos_i);

   __ ld(Lesp, Interpreter::expr_offset_in_bytes(1), O2);         // get index

   __ ld_ptr(Lesp, Interpreter::expr_offset_in_bytes(2), O3);     // get array

   // Otos_i: val

   // O2: index

   // O3: array

   __ verify_oop(Otos_i);

   __ index_check_without_pop(O3, O2, UseCompressedOops ? 2 : LogBytesPerWord, G3_scratch, O1);

   // do array store check - check for NULL value first

   __ br_null_short( Otos_i, Assembler::pn, is_null );

   __ load_klass(O3, O4); // get array klass

   __ load_klass(Otos_i, O5); // get value klass

   // do fast instanceof cache test

   __ ld_ptr(O4,     in_bytes(ObjArrayKlass::element_klass_offset()),  O4);

   assert(Otos_i == O0, "just checking");

   // Otos_i:    value

   // O1:        addr - offset

   // O2:        index

   // O3:        array

   // O4:        array element klass

   // O5:        value klass

   // Address element(O1, 0, arrayOopDesc::base_offset_in_bytes(T_OBJECT));

   // Generate a fast subtype check.  Branch to store_ok if no

   // failure.  Throw if failure.

   __ gen_subtype_check( O5, O4, G3_scratch, G4_scratch, G1_scratch, store_ok );

   // Not a subtype; so must throw exception

   __ throw_if_not_x( Assembler::never, Interpreter::_throw_ArrayStoreException_entry, G3_scratch );

   // Store is OK.

   __ bind(store_ok);

   do_oop_store(_masm, O1, noreg, arrayOopDesc::base_offset_in_bytes(T_OBJECT), Otos_i, G3_scratch, _bs->kind(), true);

   __ ba(done);

   __ delayed()->inc(Lesp, 3* Interpreter::stackElementSize); // adj sp (pops array, index and value)

   __ bind(is_null);

   do_oop_store(_masm, O1, noreg, arrayOopDesc::base_offset_in_bytes(T_OBJECT), G0, G4_scratch, _bs->kind(), true);

   __ profile_null_seen(G3_scratch);

   __ inc(Lesp, 3* Interpreter::stackElementSize);     // adj sp (pops array, index and value)

   __ bind(done);

 }

 void TemplateTable::bastore() {

   transition(itos, vtos);

   __ pop_i(O2); // index

   // Otos_i: val

   // O3: array

   __ index_check(O3, O2, 0, G3_scratch, O2);

   __ stb(Otos_i, O2, arrayOopDesc::base_offset_in_bytes(T_BYTE));

 }

 void TemplateTable::castore() {

   transition(itos, vtos);

   __ pop_i(O2); // index

   // Otos_i: val

   // O3: array

   __ index_check(O3, O2, LogBytesPerShort, G3_scratch, O2);

   __ sth(Otos_i, O2, arrayOopDesc::base_offset_in_bytes(T_CHAR));

 }

 void TemplateTable::sastore() {

   // %%%%% Factor across platform

   castore();

 }

 void TemplateTable::istore(int n) {

   transition(itos, vtos);

   __ st(Otos_i, Llocals, Interpreter::local_offset_in_bytes(n));

 }

 void TemplateTable::lstore(int n) {

   transition(ltos, vtos);

   assert(n+1 < Argument::n_register_parameters, "only handle register cases");

   __ store_unaligned_long(Otos_l, Llocals, Interpreter::local_offset_in_bytes(n+1));

 }

 void TemplateTable::fstore(int n) {

   transition(ftos, vtos);

   assert(n < Argument::n_register_parameters, "only handle register cases");

   __ stf(FloatRegisterImpl::S, Ftos_f, Llocals, Interpreter::local_offset_in_bytes(n));

 }

 void TemplateTable::dstore(int n) {

   transition(dtos, vtos);

   FloatRegister src = Ftos_d;

   __ store_unaligned_double(src, Llocals, Interpreter::local_offset_in_bytes(n+1));

 }

 void TemplateTable::astore(int n) {

   transition(vtos, vtos);

   __ load_ptr(0, Otos_i);

   __ inc(Lesp, Interpreter::stackElementSize);

   __ verify_oop_or_return_address(Otos_i, G3_scratch);

   __ store_local_ptr(n, Otos_i);

 }

 void TemplateTable::pop() {

   transition(vtos, vtos);

   __ inc(Lesp, Interpreter::stackElementSize);

 }

 void TemplateTable::pop2() {

   transition(vtos, vtos);

   __ inc(Lesp, 2 * Interpreter::stackElementSize);

 }

 void TemplateTable::dup() {

   transition(vtos, vtos);

   // stack: ..., a

   // load a and tag

   __ load_ptr(0, Otos_i);

   __ push_ptr(Otos_i);

   // stack: ..., a, a

 }

 void TemplateTable::dup_x1() {

   transition(vtos, vtos);

   // stack: ..., a, b

   __ load_ptr( 1, G3_scratch);  // get a

   __ load_ptr( 0, Otos_l1);     // get b

   __ store_ptr(1, Otos_l1);     // put b

   __ store_ptr(0, G3_scratch);  // put a - like swap

   __ push_ptr(Otos_l1);         // push b

   // stack: ..., b, a, b

 }

 void TemplateTable::dup_x2() {

   transition(vtos, vtos);

   // stack: ..., a, b, c

   // get c and push on stack, reuse registers

   __ load_ptr( 0, G3_scratch);  // get c

   __ push_ptr(G3_scratch);      // push c with tag

   // stack: ..., a, b, c, c  (c in reg)  (Lesp - 4)

   // (stack offsets n+1 now)

   __ load_ptr( 3, Otos_l1);     // get a

   __ store_ptr(3, G3_scratch);  // put c at 3

   // stack: ..., c, b, c, c  (a in reg)

   __ load_ptr( 2, G3_scratch);  // get b

   __ store_ptr(2, Otos_l1);     // put a at 2

   // stack: ..., c, a, c, c  (b in reg)

   __ store_ptr(1, G3_scratch);  // put b at 1

   // stack: ..., c, a, b, c

 }

 void TemplateTable::dup2() {

   transition(vtos, vtos);

   __ load_ptr(1, G3_scratch);  // get a

   __ load_ptr(0, Otos_l1);     // get b

   __ push_ptr(G3_scratch);     // push a

   __ push_ptr(Otos_l1);        // push b

   // stack: ..., a, b, a, b

 }

 void TemplateTable::dup2_x1() {

   transition(vtos, vtos);

   // stack: ..., a, b, c

   __ load_ptr( 1, Lscratch);    // get b

   __ load_ptr( 2, Otos_l1);     // get a

   __ store_ptr(2, Lscratch);    // put b at a

   // stack: ..., b, b, c

   __ load_ptr( 0, G3_scratch);  // get c

   __ store_ptr(1, G3_scratch);  // put c at b

   // stack: ..., b, c, c

   __ store_ptr(0, Otos_l1);     // put a at c

   // stack: ..., b, c, a

   __ push_ptr(Lscratch);        // push b

   __ push_ptr(G3_scratch);      // push c

   // stack: ..., b, c, a, b, c

 }

 // The spec says that these types can be a mixture of category 1 (1 word)

 // types and/or category 2 types (long and doubles)

 void TemplateTable::dup2_x2() {

   transition(vtos, vtos);

   // stack: ..., a, b, c, d

   __ load_ptr( 1, Lscratch);    // get c

   __ load_ptr( 3, Otos_l1);     // get a

   __ store_ptr(3, Lscratch);    // put c at 3

   __ store_ptr(1, Otos_l1);     // put a at 1

   // stack: ..., c, b, a, d

   __ load_ptr( 2, G3_scratch);  // get b

   __ load_ptr( 0, Otos_l1);     // get d

   __ store_ptr(0, G3_scratch);  // put b at 0

   __ store_ptr(2, Otos_l1);     // put d at 2

   // stack: ..., c, d, a, b

   __ push_ptr(Lscratch);        // push c

   __ push_ptr(Otos_l1);         // push d

   // stack: ..., c, d, a, b, c, d

 }

 void TemplateTable::swap() {

   transition(vtos, vtos);

   // stack: ..., a, b

   __ load_ptr( 1, G3_scratch);  // get a

   __ load_ptr( 0, Otos_l1);     // get b

   __ store_ptr(0, G3_scratch);  // put b

   __ store_ptr(1, Otos_l1);     // put a

   // stack: ..., b, a

 }

 void TemplateTable::iop2(Operation op) {

   transition(itos, itos);

   __ pop_i(O1);

   switch (op) {

    case  add:  __  add(O1, Otos_i, Otos_i);  break;

    case  sub:  __  sub(O1, Otos_i, Otos_i);  break;

      // %%%%% Mul may not exist: better to call .mul?

    case  mul:  __ smul(O1, Otos_i, Otos_i);  break;

    case _and:  __ and3(O1, Otos_i, Otos_i);  break;

    case  _or:  __  or3(O1, Otos_i, Otos_i);  break;

    case _xor:  __ xor3(O1, Otos_i, Otos_i);  break;

    case  shl:  __  sll(O1, Otos_i, Otos_i);  break;

    case  shr:  __  sra(O1, Otos_i, Otos_i);  break;

    case ushr:  __  srl(O1, Otos_i, Otos_i);  break;

    default: ShouldNotReachHere();

   }

 }

 void TemplateTable::lop2(Operation op) {

   transition(ltos, ltos);

   __ pop_l(O2);

   switch (op) {

 #ifdef _LP64

    case  add:  __  add(O2, Otos_l, Otos_l);  break;

    case  sub:  __  sub(O2, Otos_l, Otos_l);  break;

    case _and:  __ and3(O2, Otos_l, Otos_l);  break;

    case  _or:  __  or3(O2, Otos_l, Otos_l);  break;

    case _xor:  __ xor3(O2, Otos_l, Otos_l);  break;

 #else

    case  add:  __ addcc(O3, Otos_l2, Otos_l2);  __ addc(O2, Otos_l1, Otos_l1);  break;

    case  sub:  __ subcc(O3, Otos_l2, Otos_l2);  __ subc(O2, Otos_l1, Otos_l1);  break;

    case _and:  __  and3(O3, Otos_l2, Otos_l2);  __ and3(O2, Otos_l1, Otos_l1);  break;

    case  _or:  __   or3(O3, Otos_l2, Otos_l2);  __  or3(O2, Otos_l1, Otos_l1);  break;

    case _xor:  __  xor3(O3, Otos_l2, Otos_l2);  __ xor3(O2, Otos_l1, Otos_l1);  break;

 #endif

    default: ShouldNotReachHere();

   }

 }

 void TemplateTable::idiv() {

   // %%%%% Later: ForSPARC/V7 call .sdiv library routine,

   // %%%%% Use ldsw...sdivx on pure V9 ABI. 64 bit safe.

   transition(itos, itos);

   __ pop_i(O1); // get 1st op

   // Y contains upper 32 bits of result, set it to 0 or all ones

   __ wry(G0);

   __ mov(~0, G3_scratch);

   __ tst(O1);

      Label neg;

   __ br(Assembler::negative, true, Assembler::pn, neg);

   __ delayed()->wry(G3_scratch);

   __ bind(neg);

      Label ok;

   __ tst(Otos_i);

   __ throw_if_not_icc( Assembler::notZero, Interpreter::_throw_ArithmeticException_entry, G3_scratch );

   const int min_int = 0x80000000;

   Label regular;

   __ cmp(Otos_i, -1);

   __ br(Assembler::notEqual, false, Assembler::pt, regular);

 #ifdef _LP64

   // Don't put set in delay slot

   // Set will turn into multiple instructions in 64 bit mode

   __ delayed()->nop();

   __ set(min_int, G4_scratch);

 #else

   __ delayed()->set(min_int, G4_scratch);

 #endif

   Label done;

   __ cmp(O1, G4_scratch);

   __ br(Assembler::equal, true, Assembler::pt, done);

   __ delayed()->mov(O1, Otos_i);   // (mov only executed if branch taken)

   __ bind(regular);

   __ sdiv(O1, Otos_i, Otos_i); // note: irem uses O1 after this instruction!

   __ bind(done);

 }

 void TemplateTable::irem() {

   transition(itos, itos);

   __ mov(Otos_i, O2); // save divisor

   idiv();                               // %%%% Hack: exploits fact that idiv leaves dividend in O1

   __ smul(Otos_i, O2, Otos_i);

   __ sub(O1, Otos_i, Otos_i);

 }

 void TemplateTable::lmul() {

   transition(ltos, ltos);

   __ pop_l(O2);

 #ifdef _LP64

   __ mulx(Otos_l, O2, Otos_l);

 #else

   __ call_VM_leaf(Lscratch, CAST_FROM_FN_PTR(address, SharedRuntime::lmul));

 #endif

 }

 void TemplateTable::ldiv() {

   transition(ltos, ltos);

   // check for zero

   __ pop_l(O2);

 #ifdef _LP64

   __ tst(Otos_l);

   __ throw_if_not_xcc( Assembler::notZero, Interpreter::_throw_ArithmeticException_entry, G3_scratch);

   __ sdivx(O2, Otos_l, Otos_l);

 #else

   __ orcc(Otos_l1, Otos_l2, G0);

   __ throw_if_not_icc( Assembler::notZero, Interpreter::_throw_ArithmeticException_entry, G3_scratch);

   __ call_VM_leaf(Lscratch, CAST_FROM_FN_PTR(address, SharedRuntime::ldiv));

 #endif

 }

 void TemplateTable::lrem() {

   transition(ltos, ltos);

   // check for zero

   __ pop_l(O2);

 #ifdef _LP64

   __ tst(Otos_l);

   __ throw_if_not_xcc( Assembler::notZero, Interpreter::_throw_ArithmeticException_entry, G3_scratch);

   __ sdivx(O2, Otos_l, Otos_l2);

   __ mulx (Otos_l2, Otos_l, Otos_l2);

   __ sub  (O2, Otos_l2, Otos_l);

 #else

   __ orcc(Otos_l1, Otos_l2, G0);

   __ throw_if_not_icc(Assembler::notZero, Interpreter::_throw_ArithmeticException_entry, G3_scratch);

   __ call_VM_leaf(Lscratch, CAST_FROM_FN_PTR(address, SharedRuntime::lrem));

 #endif

 }

 void TemplateTable::lshl() {

   transition(itos, ltos); // %%%% could optimize, fill delay slot or opt for ultra

   __ pop_l(O2);                          // shift value in O2, O3

 #ifdef _LP64

   __ sllx(O2, Otos_i, Otos_l);

 #else

   __ lshl(O2, O3, Otos_i, Otos_l1, Otos_l2, O4);

 #endif

 }

 void TemplateTable::lshr() {

   transition(itos, ltos); // %%%% see lshl comment

   __ pop_l(O2);                          // shift value in O2, O3

 #ifdef _LP64

   __ srax(O2, Otos_i, Otos_l);

 #else

   __ lshr(O2, O3, Otos_i, Otos_l1, Otos_l2, O4);

 #endif

 }

 void TemplateTable::lushr() {

   transition(itos, ltos); // %%%% see lshl comment

   __ pop_l(O2);                          // shift value in O2, O3

 #ifdef _LP64

   __ srlx(O2, Otos_i, Otos_l);

 #else

   __ lushr(O2, O3, Otos_i, Otos_l1, Otos_l2, O4);

 #endif

 }

 void TemplateTable::fop2(Operation op) {

   transition(ftos, ftos);

   switch (op) {

    case  add:  __  pop_f(F4); __ fadd(FloatRegisterImpl::S, F4, Ftos_f, Ftos_f);  break;

    case  sub:  __  pop_f(F4); __ fsub(FloatRegisterImpl::S, F4, Ftos_f, Ftos_f);  break;

    case  mul:  __  pop_f(F4); __ fmul(FloatRegisterImpl::S, F4, Ftos_f, Ftos_f);  break;

    case  div:  __  pop_f(F4); __ fdiv(FloatRegisterImpl::S, F4, Ftos_f, Ftos_f);  break;

    case  rem:

      assert(Ftos_f == F0, "just checking");

 #ifdef _LP64

      // LP64 calling conventions use F1, F3 for passing 2 floats

      __ pop_f(F1);

      __ fmov(FloatRegisterImpl::S, Ftos_f, F3);

 #else

      __ pop_i(O0);

      __ stf(FloatRegisterImpl::S, Ftos_f, __ d_tmp);

      __ ld( __ d_tmp, O1 );

 #endif

      __ call_VM_leaf(Lscratch, CAST_FROM_FN_PTR(address, SharedRuntime::frem));

      assert( Ftos_f == F0, "fix this code" );

      break;

    default: ShouldNotReachHere();

   }

 }

 void TemplateTable::dop2(Operation op) {

   transition(dtos, dtos);

   switch (op) {

    case  add:  __  pop_d(F4); __ fadd(FloatRegisterImpl::D, F4, Ftos_d, Ftos_d);  break;

    case  sub:  __  pop_d(F4); __ fsub(FloatRegisterImpl::D, F4, Ftos_d, Ftos_d);  break;

    case  mul:  __  pop_d(F4); __ fmul(FloatRegisterImpl::D, F4, Ftos_d, Ftos_d);  break;

    case  div:  __  pop_d(F4); __ fdiv(FloatRegisterImpl::D, F4, Ftos_d, Ftos_d);  break;

    case  rem:

 #ifdef _LP64

      // Pass arguments in D0, D2

      __ fmov(FloatRegisterImpl::D, Ftos_f, F2 );

      __ pop_d( F0 );

 #else

      // Pass arguments in O0O1, O2O3

      __ stf(FloatRegisterImpl::D, Ftos_f, __ d_tmp);

      __ ldd( __ d_tmp, O2 );

      __ pop_d(Ftos_f);

      __ stf(FloatRegisterImpl::D, Ftos_f, __ d_tmp);

      __ ldd( __ d_tmp, O0 );

 #endif

      __ call_VM_leaf(Lscratch, CAST_FROM_FN_PTR(address, SharedRuntime::drem));

      assert( Ftos_d == F0, "fix this code" );

      break;

    default: ShouldNotReachHere();

   }

 }

 void TemplateTable::ineg() {

   transition(itos, itos);

   __ neg(Otos_i);

 }

 void TemplateTable::lneg() {

   transition(ltos, ltos);

 #ifdef _LP64

   __ sub(G0, Otos_l, Otos_l);

 #else

   __ lneg(Otos_l1, Otos_l2);

 #endif

 }

 void TemplateTable::fneg() {

   transition(ftos, ftos);

   __ fneg(FloatRegisterImpl::S, Ftos_f);

 }

 void TemplateTable::dneg() {

   transition(dtos, dtos);

   // v8 has fnegd if source and dest are the same

   __ fneg(FloatRegisterImpl::D, Ftos_f);

 }

 void TemplateTable::iinc() {

   transition(vtos, vtos);

   locals_index(G3_scratch);

   __ ldsb(Lbcp, 2, O2);  // load constant

   __ access_local_int(G3_scratch, Otos_i);

   __ add(Otos_i, O2, Otos_i);

   __ st(Otos_i, G3_scratch, 0);    // access_local_int puts E.A. in G3_scratch

 }

 void TemplateTable::wide_iinc() {

   transition(vtos, vtos);

   locals_index_wide(G3_scratch);

   __ get_2_byte_integer_at_bcp( 4,  O2, O3, InterpreterMacroAssembler::Signed);

   __ access_local_int(G3_scratch, Otos_i);

   __ add(Otos_i, O3, Otos_i);

   __ st(Otos_i, G3_scratch, 0);    // access_local_int puts E.A. in G3_scratch

 }

 void TemplateTable::convert() {

 // %%%%% Factor this first part accross platforms

   #ifdef ASSERT

     TosState tos_in  = ilgl;

     TosState tos_out = ilgl;

     switch (bytecode()) {

       case Bytecodes::_i2l: // fall through

       case Bytecodes::_i2f: // fall through

       case Bytecodes::_i2d: // fall through

       case Bytecodes::_i2b: // fall through

       case Bytecodes::_i2c: // fall through

       case Bytecodes::_i2s: tos_in = itos; break;

       case Bytecodes::_l2i: // fall through

       case Bytecodes::_l2f: // fall through

       case Bytecodes::_l2d: tos_in = ltos; break;

       case Bytecodes::_f2i: // fall through

       case Bytecodes::_f2l: // fall through

       case Bytecodes::_f2d: tos_in = ftos; break;

       case Bytecodes::_d2i: // fall through

       case Bytecodes::_d2l: // fall through

       case Bytecodes::_d2f: tos_in = dtos; break;

       default             : ShouldNotReachHere();

     }

     switch (bytecode()) {

       case Bytecodes::_l2i: // fall through

       case Bytecodes::_f2i: // fall through

       case Bytecodes::_d2i: // fall through

       case Bytecodes::_i2b: // fall through

       case Bytecodes::_i2c: // fall through

       case Bytecodes::_i2s: tos_out = itos; break;

       case Bytecodes::_i2l: // fall through

       case Bytecodes::_f2l: // fall through

       case Bytecodes::_d2l: tos_out = ltos; break;

       case Bytecodes::_i2f: // fall through

       case Bytecodes::_l2f: // fall through

       case Bytecodes::_d2f: tos_out = ftos; break;

       case Bytecodes::_i2d: // fall through

       case Bytecodes::_l2d: // fall through

       case Bytecodes::_f2d: tos_out = dtos; break;

       default             : ShouldNotReachHere();

     }

     transition(tos_in, tos_out);

   #endif

   // Conversion

   Label done;

   switch (bytecode()) {

    case Bytecodes::_i2l:

 #ifdef _LP64

     // Sign extend the 32 bits

     __ sra ( Otos_i, 0, Otos_l );

 #else

     __ addcc(Otos_i, 0, Otos_l2);

     __ br(Assembler::greaterEqual, true, Assembler::pt, done);

     __ delayed()->clr(Otos_l1);

     __ set(~0, Otos_l1);

 #endif

     break;

    case Bytecodes::_i2f:

     __ st(Otos_i, __ d_tmp );

     __ ldf(FloatRegisterImpl::S,  __ d_tmp, F0);

     __ fitof(FloatRegisterImpl::S, F0, Ftos_f);

     break;

    case Bytecodes::_i2d:

     __ st(Otos_i, __ d_tmp);

     __ ldf(FloatRegisterImpl::S,  __ d_tmp, F0);

     __ fitof(FloatRegisterImpl::D, F0, Ftos_f);

     break;

    case Bytecodes::_i2b:

     __ sll(Otos_i, 24, Otos_i);

     __ sra(Otos_i, 24, Otos_i);

     break;

    case Bytecodes::_i2c:

     __ sll(Otos_i, 16, Otos_i);

     __ srl(Otos_i, 16, Otos_i);

     break;

    case Bytecodes::_i2s:

     __ sll(Otos_i, 16, Otos_i);

     __ sra(Otos_i, 16, Otos_i);

     break;

    case Bytecodes::_l2i:

 #ifndef _LP64

     __ mov(Otos_l2, Otos_i);

 #else

     // Sign-extend into the high 32 bits

     __ sra(Otos_l, 0, Otos_i);

 #endif

     break;

    case Bytecodes::_l2f:

    case Bytecodes::_l2d:

     __ st_long(Otos_l, __ d_tmp);

     __ ldf(FloatRegisterImpl::D, __ d_tmp, Ftos_d);

     if (VM_Version::v9_instructions_work()) {

       if (bytecode() == Bytecodes::_l2f) {

         __ fxtof(FloatRegisterImpl::S, Ftos_d, Ftos_f);

       } else {

         __ fxtof(FloatRegisterImpl::D, Ftos_d, Ftos_d);

       }

     } else {

       __ call_VM_leaf(

         Lscratch,

         bytecode() == Bytecodes::_l2f

           ? CAST_FROM_FN_PTR(address, SharedRuntime::l2f)

           : CAST_FROM_FN_PTR(address, SharedRuntime::l2d)

       );

     }

     break;

   case Bytecodes::_f2i:  {

       Label isNaN;

       // result must be 0 if value is NaN; test by comparing value to itself

       __ fcmp(FloatRegisterImpl::S, Assembler::fcc0, Ftos_f, Ftos_f);

       // According to the v8 manual, you have to have a non-fp instruction

       // between fcmp and fb.

       if (!VM_Version::v9_instructions_work()) {

         __ nop();

       }

       __ fb(Assembler::f_unordered, true, Assembler::pn, isNaN);

       __ delayed()->clr(Otos_i);                                     // NaN

       __ ftoi(FloatRegisterImpl::S, Ftos_f, F30);

       __ stf(FloatRegisterImpl::S, F30, __ d_tmp);

       __ ld(__ d_tmp, Otos_i);

       __ bind(isNaN);

     }

     break;

    case Bytecodes::_f2l:

     // must uncache tos

     __ push_f();

 #ifdef _LP64

     __ pop_f(F1);

 #else

     __ pop_i(O0);

 #endif

     __ call_VM_leaf(Lscratch, CAST_FROM_FN_PTR(address, SharedRuntime::f2l));

     break;

    case Bytecodes::_f2d:

     __ ftof( FloatRegisterImpl::S, FloatRegisterImpl::D, Ftos_f, Ftos_f);

     break;

    case Bytecodes::_d2i:

    case Bytecodes::_d2l:

     // must uncache tos

     __ push_d();

 #ifdef _LP64

     // LP64 calling conventions pass first double arg in D0

     __ pop_d( Ftos_d );

 #else

     __ pop_i( O0 );

     __ pop_i( O1 );

 #endif

     __ call_VM_leaf(Lscratch,

         bytecode() == Bytecodes::_d2i

           ? CAST_FROM_FN_PTR(address, SharedRuntime::d2i)

           : CAST_FROM_FN_PTR(address, SharedRuntime::d2l));

     break;

     case Bytecodes::_d2f:

     if (VM_Version::v9_instructions_work()) {

       __ ftof( FloatRegisterImpl::D, FloatRegisterImpl::S, Ftos_d, Ftos_f);

     }

     else {

       // must uncache tos

       __ push_d();

       __ pop_i(O0);

       __ pop_i(O1);

       __ call_VM_leaf(Lscratch, CAST_FROM_FN_PTR(address, SharedRuntime::d2f));

     }

     break;

     default: ShouldNotReachHere();

   }

   __ bind(done);

 }

 void TemplateTable::lcmp() {

   transition(ltos, itos);

 #ifdef _LP64

   __ pop_l(O1); // pop off value 1, value 2 is in O0

   __ lcmp( O1, Otos_l, Otos_i );

 #else

   __ pop_l(O2); // cmp O2,3 to O0,1

   __ lcmp( O2, O3, Otos_l1, Otos_l2, Otos_i );

 #endif

 }

 void TemplateTable::float_cmp(bool is_float, int unordered_result) {

   if (is_float) __ pop_f(F2);

   else          __ pop_d(F2);

   assert(Ftos_f == F0  &&  Ftos_d == F0,  "alias checking:");

   __ float_cmp( is_float, unordered_result, F2, F0, Otos_i );

 }

 void TemplateTable::branch(bool is_jsr, bool is_wide) {

   // Note: on SPARC, we use InterpreterMacroAssembler::if_cmp also.

   __ verify_thread();

   const Register O2_bumped_count = O2;

   __ profile_taken_branch(G3_scratch, O2_bumped_count);

   // get (wide) offset to O1_disp

   const Register O1_disp = O1;

   if (is_wide)  __ get_4_byte_integer_at_bcp( 1,  G4_scratch, O1_disp,                                    InterpreterMacroAssembler::set_CC);

   else          __ get_2_byte_integer_at_bcp( 1,  G4_scratch, O1_disp, InterpreterMacroAssembler::Signed, InterpreterMacroAssembler::set_CC);

   // Handle all the JSR stuff here, then exit.

   // It's much shorter and cleaner than intermingling with the

   // non-JSR normal-branch stuff occurring below.

   if( is_jsr ) {

     // compute return address as bci in Otos_i

     __ ld_ptr(Lmethod, Method::const_offset(), G3_scratch);

     __ sub(Lbcp, G3_scratch, G3_scratch);

     __ sub(G3_scratch, in_bytes(ConstMethod::codes_offset()) - (is_wide ? 5 : 3), Otos_i);

     // Bump Lbcp to target of JSR

     __ add(Lbcp, O1_disp, Lbcp);

     // Push returnAddress for "ret" on stack

     __ push_ptr(Otos_i);

     // And away we go!

     __ dispatch_next(vtos);

     return;

   }

   // Normal (non-jsr) branch handling

   // Save the current Lbcp

   const Register O0_cur_bcp = O0;

   __ mov( Lbcp, O0_cur_bcp );

   bool increment_invocation_counter_for_backward_branches = UseCompiler && UseLoopCounter;

   if ( increment_invocation_counter_for_backward_branches ) {

     Label Lforward;

     // check branch direction

     __ br( Assembler::positive, false,  Assembler::pn, Lforward );

     // Bump bytecode pointer by displacement (take the branch)

     __ delayed()->add( O1_disp, Lbcp, Lbcp );     // add to bc addr

     if (TieredCompilation) {

       Label Lno_mdo, Loverflow;

       int increment = InvocationCounter::count_increment;

       int mask = ((1 << Tier0BackedgeNotifyFreqLog) - 1) << InvocationCounter::count_shift;

       if (ProfileInterpreter) {

         // If no method data exists, go to profile_continue.

         __ ld_ptr(Lmethod, Method::method_data_offset(), G4_scratch);

         __ br_null_short(G4_scratch, Assembler::pn, Lno_mdo);

         // Increment backedge counter in the MDO

         Address mdo_backedge_counter(G4_scratch, in_bytes(MethodData::backedge_counter_offset()) +

                                                  in_bytes(InvocationCounter::counter_offset()));

         __ increment_mask_and_jump(mdo_backedge_counter, increment, mask, G3_scratch, Lscratch,

                                    Assembler::notZero, &Lforward);

         __ ba_short(Loverflow);

       }

       // If there's no MDO, increment counter in Method*

       __ bind(Lno_mdo);

       Address backedge_counter(Lmethod, in_bytes(Method::backedge_counter_offset()) +

                                         in_bytes(InvocationCounter::counter_offset()));

       __ increment_mask_and_jump(backedge_counter, increment, mask, G3_scratch, Lscratch,

                                  Assembler::notZero, &Lforward);

       __ bind(Loverflow);

       // notify point for loop, pass branch bytecode

       __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), O0_cur_bcp);

       // Was an OSR adapter generated?

       // O0 = osr nmethod

       __ br_null_short(O0, Assembler::pn, Lforward);

       // Has the nmethod been invalidated already?

       __ ld(O0, nmethod::entry_bci_offset(), O2);

       __ cmp_and_br_short(O2, InvalidOSREntryBci, Assembler::equal, Assembler::pn, Lforward);

       // migrate the interpreter frame off of the stack

       __ mov(G2_thread, L7);

       // save nmethod

       __ mov(O0, L6);

       __ set_last_Java_frame(SP, noreg);

       __ call_VM_leaf(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_begin), L7);

       __ reset_last_Java_frame();

       __ mov(L7, G2_thread);

       // move OSR nmethod to I1

       __ mov(L6, I1);

       // OSR buffer to I0

       __ mov(O0, I0);

       // remove the interpreter frame

       __ restore(I5_savedSP, 0, SP);

       // Jump to the osr code.

       __ ld_ptr(O1, nmethod::osr_entry_point_offset(), O2);

       __ jmp(O2, G0);

       __ delayed()->nop();

     } else {

       // Update Backedge branch separately from invocations

       const Register G4_invoke_ctr = G4;

       __ increment_backedge_counter(G4_invoke_ctr, G1_scratch);

       if (ProfileInterpreter) {

         __ test_invocation_counter_for_mdp(G4_invoke_ctr, G3_scratch, Lforward);

         if (UseOnStackReplacement) {

           __ test_backedge_count_for_osr(O2_bumped_count, O0_cur_bcp, G3_scratch);

         }

       } else {

         if (UseOnStackReplacement) {

           __ test_backedge_count_for_osr(G4_invoke_ctr, O0_cur_bcp, G3_scratch);

         }

       }

     }

     __ bind(Lforward);

   } else

     // Bump bytecode pointer by displacement (take the branch)

     __ add( O1_disp, Lbcp, Lbcp );// add to bc addr

   // continue with bytecode @ target

   // %%%%% Like Intel, could speed things up by moving bytecode fetch to code above,

   // %%%%% and changing dispatch_next to dispatch_only

   __ dispatch_next(vtos);

 }

 // Note Condition in argument is TemplateTable::Condition

 // arg scope is within class scope

 void TemplateTable::if_0cmp(Condition cc) {

   // no pointers, integer only!

   transition(itos, vtos);

   // assume branch is more often taken than not (loops use backward branches)

   __ cmp( Otos_i, 0);

   __ if_cmp(ccNot(cc), false);

 }

 void TemplateTable::if_icmp(Condition cc) {

   transition(itos, vtos);

   __ pop_i(O1);

   __ cmp(O1, Otos_i);

   __ if_cmp(ccNot(cc), false);

 }

 void TemplateTable::if_nullcmp(Condition cc) {

   transition(atos, vtos);

   __ tst(Otos_i);

   __ if_cmp(ccNot(cc), true);

 }

 void TemplateTable::if_acmp(Condition cc) {

   transition(atos, vtos);

   __ pop_ptr(O1);

   __ verify_oop(O1);

   __ verify_oop(Otos_i);

   __ cmp(O1, Otos_i);

   __ if_cmp(ccNot(cc), true);

 }

 void TemplateTable::ret() {

   transition(vtos, vtos);

   locals_index(G3_scratch);

   __ access_local_returnAddress(G3_scratch, Otos_i);

   // Otos_i contains the bci, compute the bcp from that

 #ifdef _LP64

 #ifdef ASSERT

   // jsr result was labeled as an 'itos' not an 'atos' because we cannot GC

   // the result.  The return address (really a BCI) was stored with an

   // 'astore' because JVM specs claim it's a pointer-sized thing.  Hence in

   // the 64-bit build the 32-bit BCI is actually in the low bits of a 64-bit

   // loaded value.

   { Label zzz ;

      __ set (65536, G3_scratch) ;

      __ cmp (Otos_i, G3_scratch) ;

      __ bp( Assembler::lessEqualUnsigned, false, Assembler::xcc, Assembler::pn, zzz);

      __ delayed()->nop();

      __ stop("BCI is in the wrong register half?");

      __ bind (zzz) ;

   }

 #endif

 #endif

   __ profile_ret(vtos, Otos_i, G4_scratch);

   __ ld_ptr(Lmethod, Method::const_offset(), G3_scratch);

   __ add(G3_scratch, Otos_i, G3_scratch);

   __ add(G3_scratch, in_bytes(ConstMethod::codes_offset()), Lbcp);

   __ dispatch_next(vtos);

 }

 void TemplateTable::wide_ret() {

   transition(vtos, vtos);

   locals_index_wide(G3_scratch);

   __ access_local_returnAddress(G3_scratch, Otos_i);

   // Otos_i contains the bci, compute the bcp from that

   __ profile_ret(vtos, Otos_i, G4_scratch);

   __ ld_ptr(Lmethod, Method::const_offset(), G3_scratch);

   __ add(G3_scratch, Otos_i, G3_scratch);

   __ add(G3_scratch, in_bytes(ConstMethod::codes_offset()), Lbcp);

   __ dispatch_next(vtos);

 }

 void TemplateTable::tableswitch() {

   transition(itos, vtos);

   Label default_case, continue_execution;

   // align bcp

   __ add(Lbcp, BytesPerInt, O1);

   __ and3(O1, -BytesPerInt, O1);

   // load lo, hi

   __ ld(O1, 1 * BytesPerInt, O2);       // Low Byte

   __ ld(O1, 2 * BytesPerInt, O3);       // High Byte

 #ifdef _LP64

   // Sign extend the 32 bits

   __ sra ( Otos_i, 0, Otos_i );

 #endif /* _LP64 */

   // check against lo & hi

   __ cmp( Otos_i, O2);

   __ br( Assembler::less, false, Assembler::pn, default_case);

   __ delayed()->cmp( Otos_i, O3 );

   __ br( Assembler::greater, false, Assembler::pn, default_case);

   // lookup dispatch offset

   __ delayed()->sub(Otos_i, O2, O2);

   __ profile_switch_case(O2, O3, G3_scratch, G4_scratch);

   __ sll(O2, LogBytesPerInt, O2);

   __ add(O2, 3 * BytesPerInt, O2);

   __ ba(continue_execution);

   __ delayed()->ld(O1, O2, O2);

   // handle default

   __ bind(default_case);

   __ profile_switch_default(O3);

   __ ld(O1, 0, O2); // get default offset

   // continue execution

   __ bind(continue_execution);

   __ add(Lbcp, O2, Lbcp);

   __ dispatch_next(vtos);

 }

 void TemplateTable::lookupswitch() {

   transition(itos, itos);

   __ stop("lookupswitch bytecode should have been rewritten");

 }

 void TemplateTable::fast_linearswitch() {

   transition(itos, vtos);

     Label loop_entry, loop, found, continue_execution;

   // align bcp

   __ add(Lbcp, BytesPerInt, O1);

   __ and3(O1, -BytesPerInt, O1);

  // set counter

   __ ld(O1, BytesPerInt, O2);

   __ sll(O2, LogBytesPerInt + 1, O2); // in word-pairs

   __ add(O1, 2 * BytesPerInt, O3); // set first pair addr

   __ ba(loop_entry);

   __ delayed()->add(O3, O2, O2); // counter now points past last pair

   // table search

   __ bind(loop);

   __ cmp(O4, Otos_i);

   __ br(Assembler::equal, true, Assembler::pn, found);

   __ delayed()->ld(O3, BytesPerInt, O4); // offset -> O4

   __ inc(O3, 2 * BytesPerInt);

   __ bind(loop_entry);

   __ cmp(O2, O3);

   __ brx(Assembler::greaterUnsigned, true, Assembler::pt, loop);

   __ delayed()->ld(O3, 0, O4);

   // default case

   __ ld(O1, 0, O4); // get default offset

   if (ProfileInterpreter) {

     __ profile_switch_default(O3);

     __ ba_short(continue_execution);

   }

   // entry found -> get offset

   __ bind(found);

   if (ProfileInterpreter) {

     __ sub(O3, O1, O3);

     __ sub(O3, 2*BytesPerInt, O3);

     __ srl(O3, LogBytesPerInt + 1, O3); // in word-pairs

     __ profile_switch_case(O3, O1, O2, G3_scratch);

     __ bind(continue_execution);

   }

   __ add(Lbcp, O4, Lbcp);

   __ dispatch_next(vtos);

 }

 void TemplateTable::fast_binaryswitch() {

   transition(itos, vtos);

   // Implementation using the following core algorithm: (copied from Intel)

   //

   // int binary_search(int key, LookupswitchPair* array, int n) {

   //   // Binary search according to "Methodik des Programmierens" by

   //   // Edsger W. Dijkstra and W.H.J. Feijen, Addison Wesley Germany 1985.

   //   int i = 0;

   //   int j = n;

   //   while (i+1 < j) {

   //     // invariant P: 0 <= i < j <= n and (a[i] <= key < a[j] or Q)

   //     // with      Q: for all i: 0 <= i < n: key < a[i]

   //     // where a stands for the array and assuming that the (inexisting)

   //     // element a[n] is infinitely big.

   //     int h = (i + j) >> 1;

   //     // i < h < j

   //     if (key < array[h].fast_match()) {

   //       j = h;

   //     } else {

   //       i = h;

   //     }

   //   }

   //   // R: a[i] <= key < a[i+1] or Q

   //   // (i.e., if key is within array, i is the correct index)

   //   return i;

   // }

   // register allocation

   assert(Otos_i == O0, "alias checking");

   const Register Rkey     = Otos_i;                    // already set (tosca)

   const Register Rarray   = O1;

   const Register Ri       = O2;

   const Register Rj       = O3;

   const Register Rh       = O4;

   const Register Rscratch = O5;

   const int log_entry_size = 3;

   const int entry_size = 1 << log_entry_size;

   Label found;

   // Find Array start

   __ add(Lbcp, 3 * BytesPerInt, Rarray);

   __ and3(Rarray, -BytesPerInt, Rarray);

   // initialize i & j (in delay slot)

   __ clr( Ri );

   // and start

   Label entry;

   __ ba(entry);

   __ delayed()->ld( Rarray, -BytesPerInt, Rj);

   // (Rj is already in the native byte-ordering.)

   // binary search loop

   { Label loop;

     __ bind( loop );

     // int h = (i + j) >> 1;

     __ sra( Rh, 1, Rh );

     // if (key < array[h].fast_match()) {

     //   j = h;

     // } else {

     //   i = h;

     // }

     __ sll( Rh, log_entry_size, Rscratch );

     __ ld( Rarray, Rscratch, Rscratch );

     // (Rscratch is already in the native byte-ordering.)

     __ cmp( Rkey, Rscratch );

     if ( VM_Version::v9_instructions_work() ) {

       __ movcc( Assembler::less,         false, Assembler::icc, Rh, Rj );  // j = h if (key <  array[h].fast_match())

       __ movcc( Assembler::greaterEqual, false, Assembler::icc, Rh, Ri );  // i = h if (key >= array[h].fast_match())

     }

     else {

       Label end_of_if;

       __ br( Assembler::less, true, Assembler::pt, end_of_if );

       __ delayed()->mov( Rh, Rj ); // if (<) Rj = Rh

       __ mov( Rh, Ri );            // else i = h

       __ bind(end_of_if);          // }

     }

     // while (i+1 < j)

     __ bind( entry );

     __ add( Ri, 1, Rscratch );

     __ cmp(Rscratch, Rj);

     __ br( Assembler::less, true, Assembler::pt, loop );

     __ delayed()->add( Ri, Rj, Rh ); // start h = i + j  >> 1;

   }

   // end of binary search, result index is i (must check again!)

   Label default_case;

   Label continue_execution;

   if (ProfileInterpreter) {

     __ mov( Ri, Rh );              // Save index in i for profiling

   }

   __ sll( Ri, log_entry_size, Ri );

   __ ld( Rarray, Ri, Rscratch );

   // (Rscratch is already in the native byte-ordering.)

   __ cmp( Rkey, Rscratch );

   __ br( Assembler::notEqual, true, Assembler::pn, default_case );

   __ delayed()->ld( Rarray, -2 * BytesPerInt, Rj ); // load default offset -> j

   // entry found -> j = offset

   __ inc( Ri, BytesPerInt );

   __ profile_switch_case(Rh, Rj, Rscratch, Rkey);

   __ ld( Rarray, Ri, Rj );

   // (Rj is already in the native byte-ordering.)

   if (ProfileInterpreter) {

     __ ba_short(continue_execution);

   }

   __ bind(default_case); // fall through (if not profiling)

   __ profile_switch_default(Ri);

   __ bind(continue_execution);

   __ add( Lbcp, Rj, Lbcp );

   __ dispatch_next( vtos );

 }

 void TemplateTable::_return(TosState state) {

   transition(state, state);

   assert(_desc->calls_vm(), "inconsistent calls_vm information");

   if (_desc->bytecode() == Bytecodes::_return_register_finalizer) {

     assert(state == vtos, "only valid state");

     __ mov(G0, G3_scratch);

     __ access_local_ptr(G3_scratch, Otos_i);

     __ load_klass(Otos_i, O2);

     __ set(JVM_ACC_HAS_FINALIZER, G3);

     __ ld(O2, in_bytes(Klass::access_flags_offset()), O2);

     __ andcc(G3, O2, G0);

     Label skip_register_finalizer;

     __ br(Assembler::zero, false, Assembler::pn, skip_register_finalizer);

     __ delayed()->nop();

     // Call out to do finalizer registration

     __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::register_finalizer), Otos_i);

     __ bind(skip_register_finalizer);

   }

   __ remove_activation(state, /* throw_monitor_exception */ true);

   // The caller's SP was adjusted upon method entry to accomodate

   // the callee's non-argument locals. Undo that adjustment.

   __ ret();                             // return to caller

   __ delayed()->restore(I5_savedSP, G0, SP);

 }

 // ----------------------------------------------------------------------------

 // Volatile variables demand their effects be made known to all CPU's in

 // order.  Store buffers on most chips allow reads & writes to reorder; the

 // JMM's ReadAfterWrite.java test fails in -Xint mode without some kind of

 // memory barrier (i.e., it's not sufficient that the interpreter does not

 // reorder volatile references, the hardware also must not reorder them).

 //

 // According to the new Java Memory Model (JMM):

 // (1) All volatiles are serialized wrt to each other.

 // ALSO reads & writes act as aquire & release, so:

 // (2) A read cannot let unrelated NON-volatile memory refs that happen after

 // the read float up to before the read.  It's OK for non-volatile memory refs

 // that happen before the volatile read to float down below it.

 // (3) Similar a volatile write cannot let unrelated NON-volatile memory refs

 // that happen BEFORE the write float down to after the write.  It's OK for

 // non-volatile memory refs that happen after the volatile write to float up

 // before it.

 //

 // We only put in barriers around volatile refs (they are expensive), not

 // _between_ memory refs (that would require us to track the flavor of the

 // previous memory refs).  Requirements (2) and (3) require some barriers

 // before volatile stores and after volatile loads.  These nearly cover

 // requirement (1) but miss the volatile-store-volatile-load case.  This final

 // case is placed after volatile-stores although it could just as well go

 // before volatile-loads.

 void TemplateTable::volatile_barrier(Assembler::Membar_mask_bits order_constraint) {

   // Helper function to insert a is-volatile test and memory barrier

   // All current sparc implementations run in TSO, needing only StoreLoad

   if ((order_constraint & Assembler::StoreLoad) == 0) return;

   __ membar( order_constraint );

 }

 // ----------------------------------------------------------------------------

 void TemplateTable::resolve_cache_and_index(int byte_no,

                                             Register Rcache,

                                             Register index,

                                             size_t index_size) {

   // Depends on cpCacheOop layout!

   Label resolved;

     assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range");

     __ get_cache_and_index_and_bytecode_at_bcp(Rcache, index, Lbyte_code, byte_no, 1, index_size);

     __ cmp(Lbyte_code, (int) bytecode());  // have we resolved this bytecode?

     __ br(Assembler::equal, false, Assembler::pt, resolved);

     __ delayed()->set((int)bytecode(), O1);

   address entry;

   switch (bytecode()) {

     case Bytecodes::_getstatic      : // fall through

     case Bytecodes::_putstatic      : // fall through

     case Bytecodes::_getfield       : // fall through

     case Bytecodes::_putfield       : entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_get_put); break;

     case Bytecodes::_invokevirtual  : // fall through

     case Bytecodes::_invokespecial  : // fall through

     case Bytecodes::_invokestatic   : // fall through

     case Bytecodes::_invokeinterface: entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_invoke);  break;

     case Bytecodes::_invokehandle   : entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_invokehandle);  break;

     case Bytecodes::_invokedynamic  : entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_invokedynamic);  break;

     default:

       fatal(err_msg("unexpected bytecode: %s", Bytecodes::name(bytecode())));

       break;

   }

   // first time invocation - must resolve first

   __ call_VM(noreg, entry, O1);

   // Update registers with resolved info

   __ get_cache_and_index_at_bcp(Rcache, index, 1, index_size);

   __ bind(resolved);

 }

 void TemplateTable::load_invoke_cp_cache_entry(int byte_no,

                                                Register method,

                                                Register itable_index,

                                                Register flags,

                                                bool is_invokevirtual,

                                                bool is_invokevfinal,

                                                bool is_invokedynamic) {

   // Uses both G3_scratch and G4_scratch

   Register cache = G3_scratch;

   Register index = G4_scratch;

   assert_different_registers(cache, method, itable_index);

   // determine constant pool cache field offsets

   assert(is_invokevirtual == (byte_no == f2_byte), "is_invokevirtual flag redundant");

   const int method_offset = in_bytes(

       ConstantPoolCache::base_offset() +

       ((byte_no == f2_byte)

        ? ConstantPoolCacheEntry::f2_offset()

        : ConstantPoolCacheEntry::f1_offset()

       )

     );

   const int flags_offset = in_bytes(ConstantPoolCache::base_offset() +

                                     ConstantPoolCacheEntry::flags_offset());

   // access constant pool cache fields

   const int index_offset = in_bytes(ConstantPoolCache::base_offset() +

                                     ConstantPoolCacheEntry::f2_offset());

   if (is_invokevfinal) {

     __ get_cache_and_index_at_bcp(cache, index, 1);

     __ ld_ptr(Address(cache, method_offset), method);

   } else {

     size_t index_size = (is_invokedynamic ? sizeof(u4) : sizeof(u2));

     resolve_cache_and_index(byte_no, cache, index, index_size);

     __ ld_ptr(Address(cache, method_offset), method);

   }

   if (itable_index != noreg) {

     // pick up itable or appendix index from f2 also:

     __ ld_ptr(Address(cache, index_offset), itable_index);

   }

   __ ld_ptr(Address(cache, flags_offset), flags);

 }

 // The Rcache register must be set before call

 void TemplateTable::load_field_cp_cache_entry(Register Robj,

                                               Register Rcache,

                                               Register index,

                                               Register Roffset,

                                               Register Rflags,

                                               bool is_static) {

   assert_different_registers(Rcache, Rflags, Roffset);

   ByteSize cp_base_offset = ConstantPoolCache::base_offset();

   __ ld_ptr(Rcache, cp_base_offset + ConstantPoolCacheEntry::flags_offset(), Rflags);

   __ ld_ptr(Rcache, cp_base_offset + ConstantPoolCacheEntry::f2_offset(), Roffset);

   if (is_static) {

     __ ld_ptr(Rcache, cp_base_offset + ConstantPoolCacheEntry::f1_offset(), Robj);

     const int mirror_offset = in_bytes(Klass::java_mirror_offset());

     __ ld_ptr( Robj, mirror_offset, Robj);

   }

 }

 // The registers Rcache and index expected to be set before call.

 // Correct values of the Rcache and index registers are preserved.

 void TemplateTable::jvmti_post_field_access(Register Rcache,

                                             Register index,

                                             bool is_static,

                                             bool has_tos) {

   ByteSize cp_base_offset = ConstantPoolCache::base_offset();

   if (JvmtiExport::can_post_field_access()) {

     // Check to see if a field access watch has been set before we take

     // the time to call into the VM.

     Label Label1;

     assert_different_registers(Rcache, index, G1_scratch);

     AddressLiteral get_field_access_count_addr(JvmtiExport::get_field_access_count_addr());

     __ load_contents(get_field_access_count_addr, G1_scratch);

     __ cmp_and_br_short(G1_scratch, 0, Assembler::equal, Assembler::pt, Label1);

     __ add(Rcache, in_bytes(cp_base_offset), Rcache);

     if (is_static) {

       __ clr(Otos_i);

     } else {

       if (has_tos) {

       // save object pointer before call_VM() clobbers it

         __ push_ptr(Otos_i);  // put object on tos where GC wants it.

       } else {

         // Load top of stack (do not pop the value off the stack);

         __ ld_ptr(Lesp, Interpreter::expr_offset_in_bytes(0), Otos_i);

       }

       __ verify_oop(Otos_i);

     }

     // Otos_i: object pointer or NULL if static

     // Rcache: cache entry pointer

     __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_access),

                Otos_i, Rcache);

     if (!is_static && has_tos) {

       __ pop_ptr(Otos_i);  // restore object pointer

       __ verify_oop(Otos_i);

     }

     __ get_cache_and_index_at_bcp(Rcache, index, 1);

     __ bind(Label1);

   }

 }

 void TemplateTable::getfield_or_static(int byte_no, bool is_static) {

   transition(vtos, vtos);

   Register Rcache = G3_scratch;

   Register index  = G4_scratch;

   Register Rclass = Rcache;

   Register Roffset= G4_scratch;

   Register Rflags = G1_scratch;

   ByteSize cp_base_offset = ConstantPoolCache::base_offset();

   resolve_cache_and_index(byte_no, Rcache, index, sizeof(u2));

   jvmti_post_field_access(Rcache, index, is_static, false);

   load_field_cp_cache_entry(Rclass, Rcache, index, Roffset, Rflags, is_static);

   if (!is_static) {

     pop_and_check_object(Rclass);

   } else {

     __ verify_oop(Rclass);

   }

   Label exit;

   Assembler::Membar_mask_bits membar_bits =

     Assembler::Membar_mask_bits(Assembler::LoadLoad | Assembler::LoadStore);

   if (__ membar_has_effect(membar_bits)) {

     // Get volatile flag

     __ set((1 << ConstantPoolCacheEntry::is_volatile_shift), Lscratch);

     __ and3(Rflags, Lscratch, Lscratch);

   }

   Label checkVolatile;

   // compute field type

   Label notByte, notInt, notShort, notChar, notLong, notFloat, notObj;

   __ srl(Rflags, ConstantPoolCacheEntry::tos_state_shift, Rflags);

   // Make sure we don't need to mask Rflags after the above shift

   ConstantPoolCacheEntry::verify_tos_state_shift();

   // Check atos before itos for getstatic, more likely (in Queens at least)

   __ cmp(Rflags, atos);

   __ br(Assembler::notEqual, false, Assembler::pt, notObj);

   __ delayed() ->cmp(Rflags, itos);

   // atos

   __ load_heap_oop(Rclass, Roffset, Otos_i);

   __ verify_oop(Otos_i);

   __ push(atos);

   if (!is_static) {

     patch_bytecode(Bytecodes::_fast_agetfield, G3_scratch, G4_scratch);

   }

   __ ba(checkVolatile);

   __ delayed()->tst(Lscratch);

   __ bind(notObj);

   // cmp(Rflags, itos);

   __ br(Assembler::notEqual, false, Assembler::pt, notInt);

   __ delayed() ->cmp(Rflags, ltos);

   // itos

   __ ld(Rclass, Roffset, Otos_i);

   __ push(itos);

   if (!is_static) {

     patch_bytecode(Bytecodes::_fast_igetfield, G3_scratch, G4_scratch);

   }

   __ ba(checkVolatile);

   __ delayed()->tst(Lscratch);

   __ bind(notInt);

   // cmp(Rflags, ltos);

   __ br(Assembler::notEqual, false, Assembler::pt, notLong);

   __ delayed() ->cmp(Rflags, btos);

   // ltos

   // load must be atomic

   __ ld_long(Rclass, Roffset, Otos_l);

   __ push(ltos);

   if (!is_static) {

     patch_bytecode(Bytecodes::_fast_lgetfield, G3_scratch, G4_scratch);

   }

   __ ba(checkVolatile);

   __ delayed()->tst(Lscratch);

   __ bind(notLong);

   // cmp(Rflags, btos);

   __ br(Assembler::notEqual, false, Assembler::pt, notByte);

   __ delayed() ->cmp(Rflags, ctos);

   // btos

   __ ldsb(Rclass, Roffset, Otos_i);

   __ push(itos);

   if (!is_static) {

     patch_bytecode(Bytecodes::_fast_bgetfield, G3_scratch, G4_scratch);

   }

   __ ba(checkVolatile);

   __ delayed()->tst(Lscratch);

   __ bind(notByte);

   // cmp(Rflags, ctos);

   __ br(Assembler::notEqual, false, Assembler::pt, notChar);

   __ delayed() ->cmp(Rflags, stos);

   // ctos

   __ lduh(Rclass, Roffset, Otos_i);

   __ push(itos);

   if (!is_static) {

     patch_bytecode(Bytecodes::_fast_cgetfield, G3_scratch, G4_scratch);

   }

   __ ba(checkVolatile);

   __ delayed()->tst(Lscratch);

   __ bind(notChar);

   // cmp(Rflags, stos);

   __ br(Assembler::notEqual, false, Assembler::pt, notShort);

   __ delayed() ->cmp(Rflags, ftos);

   // stos

   __ ldsh(Rclass, Roffset, Otos_i);

   __ push(itos);

   if (!is_static) {

     patch_bytecode(Bytecodes::_fast_sgetfield, G3_scratch, G4_scratch);

   }

   __ ba(checkVolatile);

   __ delayed()->tst(Lscratch);

   __ bind(notShort);

   // cmp(Rflags, ftos);

   __ br(Assembler::notEqual, false, Assembler::pt, notFloat);

   __ delayed() ->tst(Lscratch);

   // ftos

   __ ldf(FloatRegisterImpl::S, Rclass, Roffset, Ftos_f);

   __ push(ftos);

   if (!is_static) {

     patch_bytecode(Bytecodes::_fast_fgetfield, G3_scratch, G4_scratch);

   }

   __ ba(checkVolatile);

   __ delayed()->tst(Lscratch);

   __ bind(notFloat);

   // dtos

   __ ldf(FloatRegisterImpl::D, Rclass, Roffset, Ftos_d);

   __ push(dtos);

   if (!is_static) {

     patch_bytecode(Bytecodes::_fast_dgetfield, G3_scratch, G4_scratch);

   }

   __ bind(checkVolatile);

   if (__ membar_has_effect(membar_bits)) {

     // __ tst(Lscratch); executed in delay slot

     __ br(Assembler::zero, false, Assembler::pt, exit);

     __ delayed()->nop();

     volatile_barrier(membar_bits);

   }

   __ bind(exit);

 }

 void TemplateTable::getfield(int byte_no) {

   getfield_or_static(byte_no, false);

 }

 void TemplateTable::getstatic(int byte_no) {

   getfield_or_static(byte_no, true);

 }

 void TemplateTable::fast_accessfield(TosState state) {

   transition(atos, state);

   Register Rcache  = G3_scratch;

   Register index   = G4_scratch;

   Register Roffset = G4_scratch;

   Register Rflags  = Rcache;

   ByteSize cp_base_offset = ConstantPoolCache::base_offset();

   __ get_cache_and_index_at_bcp(Rcache, index, 1);

   jvmti_post_field_access(Rcache, index, /*is_static*/false, /*has_tos*/true);

   __ ld_ptr(Rcache, cp_base_offset + ConstantPoolCacheEntry::f2_offset(), Roffset);

   __ null_check(Otos_i);

   __ verify_oop(Otos_i);

   Label exit;

   Assembler::Membar_mask_bits membar_bits =

     Assembler::Membar_mask_bits(Assembler::LoadLoad | Assembler::LoadStore);

   if (__ membar_has_effect(membar_bits)) {

     // Get volatile flag

     __ ld_ptr(Rcache, cp_base_offset + ConstantPoolCacheEntry::f2_offset(), Rflags);

     __ set((1 << ConstantPoolCacheEntry::is_volatile_shift), Lscratch);

   }

   switch (bytecode()) {

     case Bytecodes::_fast_bgetfield:

       __ ldsb(Otos_i, Roffset, Otos_i);

       break;

     case Bytecodes::_fast_cgetfield:

       __ lduh(Otos_i, Roffset, Otos_i);

       break;

     case Bytecodes::_fast_sgetfield:

       __ ldsh(Otos_i, Roffset, Otos_i);

       break;

     case Bytecodes::_fast_igetfield:

       __ ld(Otos_i, Roffset, Otos_i);

       break;

     case Bytecodes::_fast_lgetfield:

       __ ld_long(Otos_i, Roffset, Otos_l);

       break;

     case Bytecodes::_fast_fgetfield:

       __ ldf(FloatRegisterImpl::S, Otos_i, Roffset, Ftos_f);

       break;

     case Bytecodes::_fast_dgetfield:

       __ ldf(FloatRegisterImpl::D, Otos_i, Roffset, Ftos_d);

       break;

     case Bytecodes::_fast_agetfield:

       __ load_heap_oop(Otos_i, Roffset, Otos_i);

       break;

     default:

       ShouldNotReachHere();

   }

   if (__ membar_has_effect(membar_bits)) {

     __ btst(Lscratch, Rflags);

     __ br(Assembler::zero, false, Assembler::pt, exit);

     __ delayed()->nop();

     volatile_barrier(membar_bits);

     __ bind(exit);

   }

   if (state == atos) {

     __ verify_oop(Otos_i);    // does not blow flags!

   }

 }

 void TemplateTable::jvmti_post_fast_field_mod() {

   if (JvmtiExport::can_post_field_modification()) {

     // Check to see if a field modification watch has been set before we take

     // the time to call into the VM.

     Label done;

     AddressLiteral get_field_modification_count_addr(JvmtiExport::get_field_modification_count_addr());

     __ load_contents(get_field_modification_count_addr, G4_scratch);

     __ cmp_and_br_short(G4_scratch, 0, Assembler::equal, Assembler::pt, done);

     __ pop_ptr(G4_scratch);     // copy the object pointer from tos

     __ verify_oop(G4_scratch);

     __ push_ptr(G4_scratch);    // put the object pointer back on tos

     __ get_cache_entry_pointer_at_bcp(G1_scratch, G3_scratch, 1);

     // Save tos values before call_VM() clobbers them. Since we have

     // to do it for every data type, we use the saved values as the

     // jvalue object.

     switch (bytecode()) {  // save tos values before call_VM() clobbers them

     case Bytecodes::_fast_aputfield: __ push_ptr(Otos_i); break;

     case Bytecodes::_fast_bputfield: // fall through

     case Bytecodes::_fast_sputfield: // fall through

     case Bytecodes::_fast_cputfield: // fall through

     case Bytecodes::_fast_iputfield: __ push_i(Otos_i); break;

     case Bytecodes::_fast_dputfield: __ push_d(Ftos_d); break;

     case Bytecodes::_fast_fputfield: __ push_f(Ftos_f); break;

     // get words in right order for use as jvalue object

     case Bytecodes::_fast_lputfield: __ push_l(Otos_l); break;

     }

     // setup pointer to jvalue object

     __ mov(Lesp, G3_scratch);  __ inc(G3_scratch, wordSize);

     // G4_scratch:  object pointer

     // G1_scratch: cache entry pointer

     // G3_scratch: jvalue object on the stack

     __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_modification), G4_scratch, G1_scratch, G3_scratch);

     switch (bytecode()) {             // restore tos values

     case Bytecodes::_fast_aputfield: __ pop_ptr(Otos_i); break;

     case Bytecodes::_fast_bputfield: // fall through

     case Bytecodes::_fast_sputfield: // fall through

     case Bytecodes::_fast_cputfield: // fall through

     case Bytecodes::_fast_iputfield: __ pop_i(Otos_i); break;

     case Bytecodes::_fast_dputfield: __ pop_d(Ftos_d); break;

     case Bytecodes::_fast_fputfield: __ pop_f(Ftos_f); break;

     case Bytecodes::_fast_lputfield: __ pop_l(Otos_l); break;

     }

     __ bind(done);

   }

 }

 // The registers Rcache and index expected to be set before call.

 // The function may destroy various registers, just not the Rcache and index registers.

 void TemplateTable::jvmti_post_field_mod(Register Rcache, Register index, bool is_static) {

   ByteSize cp_base_offset = ConstantPoolCache::base_offset();

   if (JvmtiExport::can_post_field_modification()) {

     // Check to see if a field modification watch has been set before we take

     // the time to call into the VM.

     Label Label1;

     assert_different_registers(Rcache, index, G1_scratch);

     AddressLiteral get_field_modification_count_addr(JvmtiExport::get_field_modification_count_addr());

     __ load_contents(get_field_modification_count_addr, G1_scratch);

     __ cmp_and_br_short(G1_scratch, 0, Assembler::zero, Assembler::pt, Label1);

     // The Rcache and index registers have been already set.

     // This allows to eliminate this call but the Rcache and index

     // registers must be correspondingly used after this line.

     __ get_cache_and_index_at_bcp(G1_scratch, G4_scratch, 1);

     __ add(G1_scratch, in_bytes(cp_base_offset), G3_scratch);

     if (is_static) {

       // Life is simple.  Null out the object pointer.

       __ clr(G4_scratch);

     } else {

       Register Rflags = G1_scratch;

       // Life is harder. The stack holds the value on top, followed by the

       // object.  We don't know the size of the value, though; it could be

       // one or two words depending on its type. As a result, we must find

       // the type to determine where the object is.

       Label two_word, valsizeknown;

       __ ld_ptr(G1_scratch, cp_base_offset + ConstantPoolCacheEntry::flags_offset(), Rflags);

       __ mov(Lesp, G4_scratch);

       __ srl(Rflags, ConstantPoolCacheEntry::tos_state_shift, Rflags);

       // Make sure we don't need to mask Rflags after the above shift

       ConstantPoolCacheEntry::verify_tos_state_shift();

       __ cmp(Rflags, ltos);

       __ br(Assembler::equal, false, Assembler::pt, two_word);

       __ delayed()->cmp(Rflags, dtos);

       __ br(Assembler::equal, false, Assembler::pt, two_word);

       __ delayed()->nop();

       __ inc(G4_scratch, Interpreter::expr_offset_in_bytes(1));

       __ ba_short(valsizeknown);

       __ bind(two_word);

       __ inc(G4_scratch, Interpreter::expr_offset_in_bytes(2));

       __ bind(valsizeknown);

       // setup object pointer

       __ ld_ptr(G4_scratch, 0, G4_scratch);

       __ verify_oop(G4_scratch);

     }

     // setup pointer to jvalue object

     __ mov(Lesp, G1_scratch);  __ inc(G1_scratch, wordSize);

     // G4_scratch:  object pointer or NULL if static

     // G3_scratch: cache entry pointer

     // G1_scratch: jvalue object on the stack

     __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_field_modification),

                G4_scratch, G3_scratch, G1_scratch);

     __ get_cache_and_index_at_bcp(Rcache, index, 1);

     __ bind(Label1);

   }

 }

 void TemplateTable::pop_and_check_object(Register r) {

   __ pop_ptr(r);

   __ null_check(r);  // for field access must check obj.

   __ verify_oop(r);

 }

 void TemplateTable::putfield_or_static(int byte_no, bool is_static) {

   transition(vtos, vtos);

   Register Rcache = G3_scratch;

   Register index  = G4_scratch;

   Register Rclass = Rcache;

   Register Roffset= G4_scratch;

   Register Rflags = G1_scratch;

   ByteSize cp_base_offset = ConstantPoolCache::base_offset();

   resolve_cache_and_index(byte_no, Rcache, index, sizeof(u2));

   jvmti_post_field_mod(Rcache, index, is_static);

   load_field_cp_cache_entry(Rclass, Rcache, index, Roffset, Rflags, is_static);

   Assembler::Membar_mask_bits read_bits =

     Assembler::Membar_mask_bits(Assembler::LoadStore | Assembler::StoreStore);

   Assembler::Membar_mask_bits write_bits = Assembler::StoreLoad;

   Label notVolatile, checkVolatile, exit;

   if (__ membar_has_effect(read_bits) || __ membar_has_effect(write_bits)) {

     __ set((1 << ConstantPoolCacheEntry::is_volatile_shift), Lscratch);

     __ and3(Rflags, Lscratch, Lscratch);

     if (__ membar_has_effect(read_bits)) {

       __ cmp_and_br_short(Lscratch, 0, Assembler::equal, Assembler::pt, notVolatile);

       volatile_barrier(read_bits);

       __ bind(notVolatile);

     }

   }

   __ srl(Rflags, ConstantPoolCacheEntry::tos_state_shift, Rflags);

   // Make sure we don't need to mask Rflags after the above shift

   ConstantPoolCacheEntry::verify_tos_state_shift();

   // compute field type

   Label notInt, notShort, notChar, notObj, notByte, notLong, notFloat;

   if (is_static) {

     // putstatic with object type most likely, check that first

     __ cmp(Rflags, atos);

     __ br(Assembler::notEqual, false, Assembler::pt, notObj);

     __ delayed()->cmp(Rflags, itos);

     // atos

     {

       __ pop_ptr();

       __ verify_oop(Otos_i);

       do_oop_store(_masm, Rclass, Roffset, 0, Otos_i, G1_scratch, _bs->kind(), false);

       __ ba(checkVolatile);

       __ delayed()->tst(Lscratch);

     }

     __ bind(notObj);

     // cmp(Rflags, itos);

     __ br(Assembler::notEqual, false, Assembler::pt, notInt);

     __ delayed()->cmp(Rflags, btos);

     // itos

     {

       __ pop_i();

       __ st(Otos_i, Rclass, Roffset);

       __ ba(checkVolatile);

       __ delayed()->tst(Lscratch);

     }

     __ bind(notInt);

   } else {

     // putfield with int type most likely, check that first

     __ cmp(Rflags, itos);

     __ br(Assembler::notEqual, false, Assembler::pt, notInt);

     __ delayed()->cmp(Rflags, atos);

     // itos

     {

       __ pop_i();

       pop_and_check_object(Rclass);