jdk8-mips64-public/hotspot: src/cpu/sparc/vm/templateTable

src/cpu/sparc/vm/templateTable_sparc.cpp@3dc12ef8735e (annotated)

src/cpu/sparc/vm/templateTable_sparc.cpp

Thu, 07 Oct 2010 15:12:57 -0400

author: bobv
date: Thu, 07 Oct 2010 15:12:57 -0400
changeset 2223: 3dc12ef8735e
parent 2138: d5d065957597
child 2201: d55217dc206f
permissions: -rw-r--r--

6989297: Integrate additional portability improvements
Reviewed-by: vladidan, dholmes

 /*
  * Copyright (c) 1997, 2010, 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 "incls/_precompiled.incl"
 #include "incls/_templateTable_sparc.cpp.incl"
 #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) {
 #ifndef SERIALGC
     case BarrierSet::G1SATBCT:
     case BarrierSet::G1SATBCTLogging:
       {
         __ g1_write_barrier_pre( base, index, offset, tmp, /*preserve_o_regs*/true);
         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 // SERIALGC
     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 Rbyte_code,
                                    Register Rscratch,
                                    bool load_bc_into_scratch /*=true*/) {
   // With sharing on, may need to test methodOop flag.
   if (!RewriteBytecodes) return;
   if (load_bc_into_scratch) __ set(bc, Rbyte_code);
   Label patch_done;
   if (JvmtiExport::can_post_breakpoint()) {
     Label fast_patch;
     __ ldub(at_bcp(0), Rscratch);
     __ cmp(Rscratch, Bytecodes::_breakpoint);
     __ br(Assembler::notEqual, false, Assembler::pt, fast_patch);
     __ delayed()->nop();  // don't bother to hoist the stb here
     // 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, Rbyte_code);
     __ ba(false, patch_done);
     __ delayed()->nop();
     __ bind(fast_patch);
   }
 #ifdef ASSERT
   Bytecodes::Code orig_bytecode =  Bytecodes::java_code(bc);
   Label okay;
   __ ldub(at_bcp(0), Rscratch);
   __ cmp(Rscratch, orig_bytecode);
   __ br(Assembler::equal, false, Assembler::pt, okay);
   __ delayed() ->cmp(Rscratch, Rbyte_code);
   __ br(Assembler::equal, false, Assembler::pt, okay);
   __ delayed()->nop();
   __ stop("Rewriting wrong bytecode location");
   __ bind(okay);
 #endif
   __ stb(Rbyte_code, at_bcp(0));
   __ bind(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, 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 = constantPoolOopDesc::header_size() * wordSize;
   const int tags_offset = typeArrayOopDesc::header_size(T_BYTE) * wordSize;
   // get type from tags
   __ add(O2, tags_offset, O2);
   __ ldub(O2, O1, O2);
   __ cmp(O2, JVM_CONSTANT_UnresolvedString);    // unresolved string? If so, must resolve
   __ brx(Assembler::equal, true, Assembler::pt, call_ldc);
   __ delayed()->nop();
   __ cmp(O2, JVM_CONSTANT_UnresolvedClass);     // unresolved class? If so, must resolve
   __ brx(Assembler::equal, true, Assembler::pt, call_ldc);
   __ delayed()->nop();
   __ cmp(O2, JVM_CONSTANT_UnresolvedClassInError);     // unresolved class in error state
   __ brx(Assembler::equal, true, Assembler::pn, call_ldc);
   __ delayed()->nop();
   __ 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(false, exit);
   __ delayed()->nop();
   __ 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(false, exit);
   __ delayed()->nop();
   __ bind(notInt);
  // __ cmp(O2, JVM_CONSTANT_String);
   __ brx(Assembler::notEqual, true, Assembler::pt, notString);
   __ delayed()->ldf(FloatRegisterImpl::S, O0, O1, Ftos_f);
   __ ld_ptr(O0, O1, Otos_i);
   __ verify_oop(Otos_i);
   __ push(atos);
   __ ba(false, exit);
   __ delayed()->nop();
   __ 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);
   if (!EnableMethodHandles) {
     // We should not encounter this bytecode if !EnableMethodHandles.
     // The verifier will stop it.  However, if we get past the verifier,
     // this will stop the thread in a reasonable way, without crashing the JVM.
     __ call_VM(noreg, CAST_FROM_FN_PTR(address,
                      InterpreterRuntime::throw_IncompatibleClassChangeError));
     // the call_VM checks for exception, so we should never return here.
     __ should_not_reach_here();
     return;
   }
   Register Rcache = G3_scratch;
   Register Rscratch = G4_scratch;
   resolve_cache_and_index(f1_oop, Otos_i, Rcache, Rscratch, wide ? sizeof(u2) : sizeof(u1));
   __ verify_oop(Otos_i);
 }
 void TemplateTable::ldc2_w() {
   transition(vtos, vtos);
   Label retry, resolved, Long, exit;
   __ bind(retry);
   __ get_2_byte_integer_at_bcp(1, G3_scratch, O1, InterpreterMacroAssembler::Unsigned);
   __ get_cpool_and_tags(O0, O2);
   const int base_offset = constantPoolOopDesc::header_size() * wordSize;
   const int tags_offset = typeArrayOopDesc::header_size(T_BYTE) * wordSize;
   // get type from tags
   __ add(O2, tags_offset, O2);
   __ ldub(O2, O1, O2);
   __ sll(O1, LogBytesPerWord, O1);
   __ add(O0, O1, G3_scratch);
   __ cmp(O2, JVM_CONSTANT_Double);
   __ brx(Assembler::notEqual, false, Assembler::pt, Long);
   __ delayed()->nop();
   // A double can be placed at word-aligned locations in the constant pool.
   // Check out Conversions.java for an example.
   // Also constantPoolOopDesc::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(false, exit);
   __ delayed()->nop();
   __ 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(G3_scratch, (int)Bytecodes::_iload);
     __ br(Assembler::equal, false, Assembler::pn, done);
     __ delayed()->nop();
     __ 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(G3_scratch, (int)Bytecodes::_getfield);
     __ br(Assembler::equal, false, Assembler::pn, done);
     __ delayed()->nop();
     // 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( Otos_i, false, Assembler::pn, is_null );
   __ delayed()->nop();
   __ load_klass(O3, O4); // get array klass
   __ load_klass(Otos_i, O5); // get value klass
   // do fast instanceof cache test
   __ ld_ptr(O4,     sizeof(oopDesc) + objArrayKlass::element_klass_offset_in_bytes(),  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(false,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_oop(Lmethod);
   __ 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, methodOopDesc::const_offset(), G3_scratch);
     __ sub(Lbcp, G3_scratch, G3_scratch);
     __ sub(G3_scratch, in_bytes(constMethodOopDesc::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, methodOopDesc::method_data_offset(), G4_scratch);
         __ br_null(G4_scratch, false, Assembler::pn, Lno_mdo);
         __ delayed()->nop();
         // Increment backedge counter in the MDO
         Address mdo_backedge_counter(G4_scratch, in_bytes(methodDataOopDesc::backedge_counter_offset()) +
                                                  in_bytes(InvocationCounter::counter_offset()));
         __ increment_mask_and_jump(mdo_backedge_counter, increment, mask, G3_scratch, Lscratch,
                                    Assembler::notZero, &Lforward);
         __ ba(false, Loverflow);
         __ delayed()->nop();
       }
       // If there's no MDO, increment counter in methodOop
       __ bind(Lno_mdo);
       Address backedge_counter(Lmethod, in_bytes(methodOopDesc::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(O0, false, Assembler::pn, Lforward);
       __ delayed()->nop();
       // Has the nmethod been invalidated already?
       __ ld(O0, nmethod::entry_bci_offset(), O2);
       __ cmp(O2, InvalidOSREntryBci);
       __ br(Assembler::equal, false, Assembler::pn, Lforward);
       __ delayed()->nop();
       // 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, Lbcp, 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, methodOopDesc::const_offset(), G3_scratch);
   __ add(G3_scratch, Otos_i, G3_scratch);
   __ add(G3_scratch, in_bytes(constMethodOopDesc::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, methodOopDesc::const_offset(), G3_scratch);
   __ add(G3_scratch, Otos_i, G3_scratch);
   __ add(G3_scratch, in_bytes(constMethodOopDesc::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(false, 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(false, 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(false, continue_execution);
     __ delayed()->nop();
   }
   // 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(false, 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(false, continue_execution);
     __ delayed()->nop();
   }
   __ 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, Klass::access_flags_offset_in_bytes() + sizeof(oopDesc), 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 result,
                                             Register Rcache,
                                             Register index,
                                             size_t index_size) {
   // Depends on cpCacheOop layout!
   Label resolved;
   __ get_cache_and_index_at_bcp(Rcache, index, 1, index_size);
   if (byte_no == f1_oop) {
     // We are resolved if the f1 field contains a non-null object (CallSite, etc.)
     // This kind of CP cache entry does not need to match the flags byte, because
     // there is a 1-1 relation between bytecode type and CP entry type.
     assert_different_registers(result, Rcache);
     __ ld_ptr(Rcache, constantPoolCacheOopDesc::base_offset() +
               ConstantPoolCacheEntry::f1_offset(), result);
     __ tst(result);
     __ br(Assembler::notEqual, false, Assembler::pt, resolved);
     __ delayed()->set((int)bytecode(), O1);
   } else {
     assert(byte_no == f1_byte || byte_no == f2_byte, "byte_no out of range");
     assert(result == noreg, "");  //else change code for setting result
     const int shift_count = (1 + byte_no)*BitsPerByte;
     __ ld_ptr(Rcache, constantPoolCacheOopDesc::base_offset() +
               ConstantPoolCacheEntry::indices_offset(), Lbyte_code);
     __ srl(  Lbyte_code, shift_count, Lbyte_code );
     __ and3( Lbyte_code,        0xFF, Lbyte_code );
     __ cmp(  Lbyte_code, (int)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::_invokedynamic  : entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_invokedynamic);  break;
     case Bytecodes::_fast_aldc      : entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc);     break;
     case Bytecodes::_fast_aldc_w    : entry = CAST_FROM_FN_PTR(address, InterpreterRuntime::resolve_ldc);     break;
     default                         : ShouldNotReachHere();                                 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);
   if (result != noreg)
     __ ld_ptr(Rcache, constantPoolCacheOopDesc::base_offset() +
               ConstantPoolCacheEntry::f1_offset(), result);
   __ bind(resolved);
 }
 void TemplateTable::load_invoke_cp_cache_entry(int byte_no,
                                                Register Rmethod,
                                                Register Ritable_index,
                                                Register Rflags,
                                                bool is_invokevirtual,
                                                bool is_invokevfinal,
                                                bool is_invokedynamic) {
   // Uses both G3_scratch and G4_scratch
   Register Rcache = G3_scratch;
   Register Rscratch = G4_scratch;
   assert_different_registers(Rcache, Rmethod, Ritable_index);
   ByteSize cp_base_offset = constantPoolCacheOopDesc::base_offset();
   // determine constant pool cache field offsets
   const int method_offset = in_bytes(
     cp_base_offset +
       (is_invokevirtual
        ? ConstantPoolCacheEntry::f2_offset()
        : ConstantPoolCacheEntry::f1_offset()
       )
     );
   const int flags_offset = in_bytes(cp_base_offset +
                                     ConstantPoolCacheEntry::flags_offset());
   // access constant pool cache fields
   const int index_offset = in_bytes(cp_base_offset +
                                     ConstantPoolCacheEntry::f2_offset());
   if (is_invokevfinal) {
     __ get_cache_and_index_at_bcp(Rcache, Rscratch, 1);
     __ ld_ptr(Rcache, method_offset, Rmethod);
   } else if (byte_no == f1_oop) {
     // Resolved f1_oop goes directly into 'method' register.
     resolve_cache_and_index(byte_no, Rmethod, Rcache, Rscratch, sizeof(u4));
   } else {
     resolve_cache_and_index(byte_no, noreg, Rcache, Rscratch, sizeof(u2));
     __ ld_ptr(Rcache, method_offset, Rmethod);
   }
   if (Ritable_index != noreg) {
     __ ld_ptr(Rcache, index_offset, Ritable_index);
   }
   __ ld_ptr(Rcache, flags_offset, Rflags);
 }
 // 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 = constantPoolCacheOopDesc::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);
   }
 }
 // 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 = constantPoolCacheOopDesc::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);
     __ tst(G1_scratch);
     __ br(Assembler::zero, false, Assembler::pt, Label1);
     __ delayed()->nop();
     __ 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 = constantPoolCacheOopDesc::base_offset();
   resolve_cache_and_index(byte_no, noreg, 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::volatileField), Lscratch);
     __ and3(Rflags, Lscratch, Lscratch);
   }
   Label checkVolatile;
   // compute field type
   Label notByte, notInt, notShort, notChar, notLong, notFloat, notObj;
   __ srl(Rflags, ConstantPoolCacheEntry::tosBits, Rflags);
   // Make sure we don't need to mask Rflags for tosBits after the above shift
   ConstantPoolCacheEntry::verify_tosBits();
   // 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(false, 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(false, 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(false, 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(false, 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(false, 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(false, 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(false, 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 = constantPoolCacheOopDesc::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::volatileField), 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);
     __ tst(G4_scratch);
     __ br(Assembler::zero, false, Assembler::pt, done);
     __ delayed()->nop();
     __ 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 = constantPoolCacheOopDesc::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);
     __ tst(G1_scratch);
     __ br(Assembler::zero, false, Assembler::pt, Label1);
     __ delayed()->nop();
     // 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::tosBits, Rflags);
       // Make sure we don't need to mask Rflags for tosBits after the above shift
       ConstantPoolCacheEntry::verify_tosBits();
       __ 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));
       __ br(Assembler::always, false, Assembler::pt, valsizeknown);
       __ delayed()->nop();
       __ 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 = constantPoolCacheOopDesc::base_offset();
   resolve_cache_and_index(byte_no, noreg, 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::volatileField), Lscratch);
     __ and3(Rflags, Lscratch, Lscratch);
     if (__ membar_has_effect(read_bits)) {
       __ tst(Lscratch);
       __ br(Assembler::zero, false, Assembler::pt, notVolatile);
       __ delayed()->nop();
       volatile_barrier(read_bits);
       __ bind(notVolatile);
     }
   }
   __ srl(Rflags, ConstantPoolCacheEntry::tosBits, Rflags);
   // Make sure we don't need to mask Rflags for tosBits after the above shift
   ConstantPoolCacheEntry::verify_tosBits();
   // 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(false, 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(false, 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);
     __ st(Otos_i, Rclass, Roffset);
     patch_bytecode(Bytecodes::_fast_iputfield, G3_scratch, G4_scratch);
     __ ba(false, checkVolatile);
     __ delayed()->tst(Lscratch);
     __ bind(notInt);
     // cmp(Rflags, atos );
     __ br(Assembler::notEqual, false, Assembler::pt, notObj);
     __ delayed() ->cmp(Rflags, btos );
     // atos
     __ pop_ptr();
     pop_and_check_object(Rclass);
     __ verify_oop(Otos_i);
     do_oop_store(_masm, Rclass, Roffset, 0, Otos_i, G1_scratch, _bs->kind(), false);
     patch_bytecode(Bytecodes::_fast_aputfield, G3_scratch, G4_scratch);
     __ ba(false, checkVolatile);
     __ delayed()->tst(Lscratch);
     __ bind(notObj);
   }
   // cmp(Rflags, btos );
   __ br(Assembler::notEqual, false, Assembler::pt, notByte);
   __ delayed() ->cmp(Rflags, ltos );
   // btos
   __ pop_i();
   if (!is_static) pop_and_check_object(Rclass);
   __ stb(Otos_i, Rclass, Roffset);
   if (!is_static) {
     patch_bytecode(Bytecodes::_fast_bputfield, G3_scratch, G4_scratch);
   }
   __ ba(false, checkVolatile);
   __ delayed()->tst(Lscratch);
   __ bind(notByte);
   // cmp(Rflags, ltos );
   __ br(Assembler::notEqual, false, Assembler::pt, notLong);
   __ delayed() ->cmp(Rflags, ctos );
   // ltos
   __ pop_l();
   if (!is_static) pop_and_check_object(Rclass);
   __ st_long(Otos_l, Rclass, Roffset);
   if (!is_static) {
     patch_bytecode(Bytecodes::_fast_lputfield, G3_scratch, G4_scratch);
   }
   __ ba(false, checkVolatile);
   __ delayed()->tst(Lscratch);
   __ bind(notLong);
   // cmp(Rflags, ctos );
   __ br(Assembler::notEqual, false, Assembler::pt, notChar);
   __ delayed() ->cmp(Rflags, stos );
   // ctos (char)
   __ pop_i();
   if (!is_static) pop_and_check_object(Rclass);
   __ sth(Otos_i, Rclass, Roffset);
   if (!is_static) {
     patch_bytecode(Bytecodes::_fast_cputfield, G3_scratch, G4_scratch);
   }
   __ ba(false, checkVolatile);
   __ delayed()->tst(Lscratch);
   __ bind(notChar);
   // cmp(Rflags, stos );
   __ br(Assembler::notEqual, false, Assembler::pt, notShort);
   __ delayed() ->cmp(Rflags, ftos );
   // stos (char)
   __ pop_i();
   if (!is_static) pop_and_check_object(Rclass);
   __ sth(Otos_i, Rclass, Roffset);
   if (!is_static) {
     patch_bytecode(Bytecodes::_fast_sputfield, G3_scratch, G4_scratch);
   }
   __ ba(false, checkVolatile);
   __ delayed()->tst(Lscratch);
   __ bind(notShort);
   // cmp(Rflags, ftos );
   __ br(Assembler::notZero, false, Assembler::pt, notFloat);
   __ delayed()->nop();
   // ftos
   __ pop_f();
   if (!is_static) pop_and_check_object(Rclass);
   __ stf(FloatRegisterImpl::S, Ftos_f, Rclass, Roffset);
   if (!is_static) {
     patch_bytecode(Bytecodes::_fast_fputfield, G3_scratch, G4_scratch);
   }
   __ ba(false, checkVolatile);
   __ delayed()->tst(Lscratch);
   __ bind(notFloat);
   // dtos
   __ pop_d();
   if (!is_static) pop_and_check_object(Rclass);
   __ stf(FloatRegisterImpl::D, Ftos_d, Rclass, Roffset);
   if (!is_static) {
     patch_bytecode(Bytecodes::_fast_dputfield, G3_scratch, G4_scratch);
   }
   __ bind(checkVolatile);
   __ tst(Lscratch);
   if (__ membar_has_effect(write_bits)) {
     // __ tst(Lscratch); in delay slot
     __ br(Assembler::zero, false, Assembler::pt, exit);
     __ delayed()->nop();
     volatile_barrier(Assembler::StoreLoad);
     __ bind(exit);
   }
 }
 void TemplateTable::fast_storefield(TosState state) {
   transition(state, vtos);
   Register Rcache = G3_scratch;
   Register Rclass = Rcache;
   Register Roffset= G4_scratch;
   Register Rflags = G1_scratch;
   ByteSize cp_base_offset = constantPoolCacheOopDesc::base_offset();
   jvmti_post_fast_field_mod();
   __ get_cache_and_index_at_bcp(Rcache, G4_scratch, 1);
   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)) {
     __ ld_ptr(Rcache, cp_base_offset + ConstantPoolCacheEntry::flags_offset(), Rflags);
     __ set((1 << ConstantPoolCacheEntry::volatileField), Lscratch);
     __ and3(Rflags, Lscratch, Lscratch);
     if (__ membar_has_effect(read_bits)) {
       __ tst(Lscratch);
       __ br(Assembler::zero, false, Assembler::pt, notVolatile);
       __ delayed()->nop();
       volatile_barrier(read_bits);
       __ bind(notVolatile);
     }
   }
   __ ld_ptr(Rcache, cp_base_offset + ConstantPoolCacheEntry::f2_offset(), Roffset);
   pop_and_check_object(Rclass);
   switch (bytecode()) {
     case Bytecodes::_fast_bputfield: __ stb(Otos_i, Rclass, Roffset); break;
     case Bytecodes::_fast_cputfield: /* fall through */
     case Bytecodes::_fast_sputfield: __ sth(Otos_i, Rclass, Roffset); break;
     case Bytecodes::_fast_iputfield: __ st(Otos_i, Rclass, Roffset);  break;
     case Bytecodes::_fast_lputfield: __ st_long(Otos_l, Rclass, Roffset); break;
     case Bytecodes::_fast_fputfield:
       __ stf(FloatRegisterImpl::S, Ftos_f, Rclass, Roffset);
       break;
     case Bytecodes::_fast_dputfield:
       __ stf(FloatRegisterImpl::D, Ftos_d, Rclass, Roffset);
       break;
     case Bytecodes::_fast_aputfield:
       do_oop_store(_masm, Rclass, Roffset, 0, Otos_i, G1_scratch, _bs->kind(), false);
       break;
     default:
       ShouldNotReachHere();
   }
   if (__ membar_has_effect(write_bits)) {
     __ tst(Lscratch);
     __ br(Assembler::zero, false, Assembler::pt, exit);
     __ delayed()->nop();
     volatile_barrier(Assembler::StoreLoad);
     __ bind(exit);
   }
 }
 void TemplateTable::putfield(int byte_no) {
   putfield_or_static(byte_no, false);
 }
 void TemplateTable::putstatic(int byte_no) {
   putfield_or_static(byte_no, true);
 }
 void TemplateTable::fast_xaccess(TosState state) {
   transition(vtos, state);
   Register Rcache = G3_scratch;
   Register Roffset = G4_scratch;
   Register Rflags  = G4_scratch;
   Register Rreceiver = Lscratch;
   __ ld_ptr(Llocals, 0, Rreceiver);
   // access constant pool cache  (is resolved)
   __ get_cache_and_index_at_bcp(Rcache, G4_scratch, 2);
   __ ld_ptr(Rcache, constantPoolCacheOopDesc::base_offset() + ConstantPoolCacheEntry::f2_offset(), Roffset);
   __ add(Lbcp, 1, Lbcp);       // needed to report exception at the correct bcp
   __ verify_oop(Rreceiver);
   __ null_check(Rreceiver);
   if (state == atos) {
     __ load_heap_oop(Rreceiver, Roffset, Otos_i);
   } else if (state == itos) {
     __ ld (Rreceiver, Roffset, Otos_i) ;
   } else if (state == ftos) {
     __ ldf(FloatRegisterImpl::S, Rreceiver, Roffset, Ftos_f);
   } else {
     ShouldNotReachHere();
   }
   Assembler::Membar_mask_bits membar_bits =
     Assembler::Membar_mask_bits(Assembler::LoadLoad | Assembler::LoadStore);
   if (__ membar_has_effect(membar_bits)) {
     // Get is_volatile value in Rflags and check if membar is needed
     __ ld_ptr(Rcache, constantPoolCacheOopDesc::base_offset() + ConstantPoolCacheEntry::flags_offset(), Rflags);
     // Test volatile
     Label notVolatile;
     __ set((1 << ConstantPoolCacheEntry::volatileField), Lscratch);
     __ btst(Rflags, Lscratch);
     __ br(Assembler::zero, false, Assembler::pt, notVolatile);
     __ delayed()->nop();
     volatile_barrier(membar_bits);
     __ bind(notVolatile);
   }
   __ interp_verify_oop(Otos_i, state, __FILE__, __LINE__);
   __ sub(Lbcp, 1, Lbcp);
 }
 //----------------------------------------------------------------------------------------------------
 // Calls
 void TemplateTable::count_calls(Register method, Register temp) {
   // implemented elsewhere
   ShouldNotReachHere();
 }
 void TemplateTable::generate_vtable_call(Register Rrecv, Register Rindex, Register Rret) {
   Register Rtemp = G4_scratch;
   Register Rcall = Rindex;
   assert_different_registers(Rcall, G5_method, Gargs, Rret);
   // get target methodOop & entry point
   const int base = instanceKlass::vtable_start_offset() * wordSize;
   if (vtableEntry::size() % 3 == 0) {
     // scale the vtable index by 12:
     int one_third = vtableEntry::size() / 3;
     __ sll(Rindex, exact_log2(one_third * 1 * wordSize), Rtemp);
     __ sll(Rindex, exact_log2(one_third * 2 * wordSize), Rindex);
     __ add(Rindex, Rtemp, Rindex);
   } else {
     // scale the vtable index by 8:
     __ sll(Rindex, exact_log2(vtableEntry::size() * wordSize), Rindex);
   }
   __ add(Rrecv, Rindex, Rrecv);
   __ ld_ptr(Rrecv, base + vtableEntry::method_offset_in_bytes(), G5_method);
   __ call_from_interpreter(Rcall, Gargs, Rret);
 }
 void TemplateTable::invokevirtual(int byte_no) {
   transition(vtos, vtos);
   assert(byte_no == f2_byte, "use this argument");
   Register Rscratch = G3_scratch;
   Register Rtemp = G4_scratch;
   Register Rret = Lscratch;
   Register Rrecv = G5_method;
   Label notFinal;
   load_invoke_cp_cache_entry(byte_no, G5_method, noreg, Rret, true, false, false);
   __ mov(SP, O5_savedSP); // record SP that we wanted the callee to restore
   // Check for vfinal
   __ set((1 << ConstantPoolCacheEntry::vfinalMethod), G4_scratch);
   __ btst(Rret, G4_scratch);
   __ br(Assembler::zero, false, Assembler::pt, notFinal);
   __ delayed()->and3(Rret, 0xFF, G4_scratch);      // gets number of parameters
   patch_bytecode(Bytecodes::_fast_invokevfinal, Rscratch, Rtemp);
   invokevfinal_helper(Rscratch, Rret);
   __ bind(notFinal);
   __ mov(G5_method, Rscratch);  // better scratch register
   __ load_receiver(G4_scratch, O0);  // gets receiverOop
   // receiver is in O0
   __ verify_oop(O0);
   // get return address
   AddressLiteral table(Interpreter::return_3_addrs_by_index_table());
   __ set(table, Rtemp);
   __ srl(Rret, ConstantPoolCacheEntry::tosBits, Rret);          // get return type
   // Make sure we don't need to mask Rret for tosBits after the above shift
   ConstantPoolCacheEntry::verify_tosBits();
   __ sll(Rret,  LogBytesPerWord, Rret);
   __ ld_ptr(Rtemp, Rret, Rret);         // get return address
   // get receiver klass
   __ null_check(O0, oopDesc::klass_offset_in_bytes());
   __ load_klass(O0, Rrecv);
   __ verify_oop(Rrecv);
   __ profile_virtual_call(Rrecv, O4);
   generate_vtable_call(Rrecv, Rscratch, Rret);
 }
 void TemplateTable::fast_invokevfinal(int byte_no) {
   transition(vtos, vtos);
   assert(byte_no == f2_byte, "use this argument");
   load_invoke_cp_cache_entry(byte_no, G5_method, noreg, Lscratch, true,
                              /*is_invokevfinal*/true, false);
   __ mov(SP, O5_savedSP); // record SP that we wanted the callee to restore
   invokevfinal_helper(G3_scratch, Lscratch);
 }
 void TemplateTable::invokevfinal_helper(Register Rscratch, Register Rret) {
   Register Rtemp = G4_scratch;
   __ verify_oop(G5_method);
   // Load receiver from stack slot
   __ lduh(G5_method, in_bytes(methodOopDesc::size_of_parameters_offset()), G4_scratch);
   __ load_receiver(G4_scratch, O0);
   // receiver NULL check
   __ null_check(O0);
   __ profile_final_call(O4);
   // get return address
   AddressLiteral table(Interpreter::return_3_addrs_by_index_table());
   __ set(table, Rtemp);
   __ srl(Rret, ConstantPoolCacheEntry::tosBits, Rret);          // get return type
   // Make sure we don't need to mask Rret for tosBits after the above shift
   ConstantPoolCacheEntry::verify_tosBits();
   __ sll(Rret,  LogBytesPerWord, Rret);
   __ ld_ptr(Rtemp, Rret, Rret);         // get return address
   // do the call
   __ call_from_interpreter(Rscratch, Gargs, Rret);
 }
 void TemplateTable::invokespecial(int byte_no) {
   transition(vtos, vtos);
   assert(byte_no == f1_byte, "use this argument");
   Register Rscratch = G3_scratch;
   Register Rtemp = G4_scratch;
   Register Rret = Lscratch;
   load_invoke_cp_cache_entry(byte_no, G5_method, noreg, Rret, /*virtual*/ false, false, false);
   __ mov(SP, O5_savedSP); // record SP that we wanted the callee to restore
   __ verify_oop(G5_method);
   __ lduh(G5_method, in_bytes(methodOopDesc::size_of_parameters_offset()), G4_scratch);
   __ load_receiver(G4_scratch, O0);
   // receiver NULL check
   __ null_check(O0);
   __ profile_call(O4);
   // get return address
   AddressLiteral table(Interpreter::return_3_addrs_by_index_table());
   __ set(table, Rtemp);
   __ srl(Rret, ConstantPoolCacheEntry::tosBits, Rret);          // get return type
   // Make sure we don't need to mask Rret for tosBits after the above shift
   ConstantPoolCacheEntry::verify_tosBits();
   __ sll(Rret,  LogBytesPerWord, Rret);
   __ ld_ptr(Rtemp, Rret, Rret);         // get return address
   // do the call
   __ call_from_interpreter(Rscratch, Gargs, Rret);
 }
 void TemplateTable::invokestatic(int byte_no) {
   transition(vtos, vtos);
   assert(byte_no == f1_byte, "use this argument");
   Register Rscratch = G3_scratch;
   Register Rtemp = G4_scratch;
   Register Rret = Lscratch;
   load_invoke_cp_cache_entry(byte_no, G5_method, noreg, Rret, /*virtual*/ false, false, false);
   __ mov(SP, O5_savedSP); // record SP that we wanted the callee to restore
   __ verify_oop(G5_method);
   __ profile_call(O4);
   // get return address
   AddressLiteral table(Interpreter::return_3_addrs_by_index_table());
   __ set(table, Rtemp);
   __ srl(Rret, ConstantPoolCacheEntry::tosBits, Rret);          // get return type
   // Make sure we don't need to mask Rret for tosBits after the above shift
   ConstantPoolCacheEntry::verify_tosBits();
   __ sll(Rret,  LogBytesPerWord, Rret);
   __ ld_ptr(Rtemp, Rret, Rret);         // get return address
   // do the call
   __ call_from_interpreter(Rscratch, Gargs, Rret);
 }
 void TemplateTable::invokeinterface_object_method(Register RklassOop,
                                                   Register Rcall,
                                                   Register Rret,
                                                   Register Rflags) {
   Register Rscratch = G4_scratch;
   Register Rindex = Lscratch;
   assert_different_registers(Rscratch, Rindex, Rret);
   Label notFinal;
   // Check for vfinal
   __ set((1 << ConstantPoolCacheEntry::vfinalMethod), Rscratch);
   __ btst(Rflags, Rscratch);
   __ br(Assembler::zero, false, Assembler::pt, notFinal);
   __ delayed()->nop();
   __ profile_final_call(O4);
   // do the call - the index (f2) contains the methodOop
   assert_different_registers(G5_method, Gargs, Rcall);
   __ mov(Rindex, G5_method);
   __ call_from_interpreter(Rcall, Gargs, Rret);
   __ bind(notFinal);
   __ profile_virtual_call(RklassOop, O4);
   generate_vtable_call(RklassOop, Rindex, Rret);
 }
 void TemplateTable::invokeinterface(int byte_no) {
   transition(vtos, vtos);
   assert(byte_no == f1_byte, "use this argument");
   Register Rscratch = G4_scratch;
   Register Rret = G3_scratch;
   Register Rindex = Lscratch;
   Register Rinterface = G1_scratch;
   Register RklassOop = G5_method;
   Register Rflags = O1;
   assert_different_registers(Rscratch, G5_method);
   load_invoke_cp_cache_entry(byte_no, Rinterface, Rindex, Rflags, /*virtual*/ false, false, false);
   __ mov(SP, O5_savedSP); // record SP that we wanted the callee to restore
   // get receiver
   __ and3(Rflags, 0xFF, Rscratch);       // gets number of parameters
   __ load_receiver(Rscratch, O0);
   __ verify_oop(O0);
   __ mov(Rflags, Rret);
   // get return address
   AddressLiteral table(Interpreter::return_5_addrs_by_index_table());
   __ set(table, Rscratch);
   __ srl(Rret, ConstantPoolCacheEntry::tosBits, Rret);          // get return type
   // Make sure we don't need to mask Rret for tosBits after the above shift
   ConstantPoolCacheEntry::verify_tosBits();
   __ sll(Rret,  LogBytesPerWord, Rret);
   __ ld_ptr(Rscratch, Rret, Rret);      // get return address
   // get receiver klass
   __ null_check(O0, oopDesc::klass_offset_in_bytes());
   __ load_klass(O0, RklassOop);
   __ verify_oop(RklassOop);
   // Special case of invokeinterface called for virtual method of
   // java.lang.Object.  See cpCacheOop.cpp for details.
   // This code isn't produced by javac, but could be produced by
   // another compliant java compiler.
   Label notMethod;
   __ set((1 << ConstantPoolCacheEntry::methodInterface), Rscratch);
   __ btst(Rflags, Rscratch);
   __ br(Assembler::zero, false, Assembler::pt, notMethod);
   __ delayed()->nop();
   invokeinterface_object_method(RklassOop, Rinterface, Rret, Rflags);
   __ bind(notMethod);
   __ profile_virtual_call(RklassOop, O4);
   //
   // find entry point to call
   //
   // compute start of first itableOffsetEntry (which is at end of vtable)
   const int base = instanceKlass::vtable_start_offset() * wordSize;
   Label search;
   Register Rtemp = Rflags;
   __ ld(RklassOop, instanceKlass::vtable_length_offset() * wordSize, Rtemp);
   if (align_object_offset(1) > 1) {
     __ round_to(Rtemp, align_object_offset(1));
   }
   __ sll(Rtemp, LogBytesPerWord, Rtemp);   // Rscratch *= 4;
   if (Assembler::is_simm13(base)) {
     __ add(Rtemp, base, Rtemp);
   } else {
     __ set(base, Rscratch);
     __ add(Rscratch, Rtemp, Rtemp);
   }
   __ add(RklassOop, Rtemp, Rscratch);
   __ bind(search);
   __ ld_ptr(Rscratch, itableOffsetEntry::interface_offset_in_bytes(), Rtemp);
   {
     Label ok;
     // Check that entry is non-null.  Null entries are probably a bytecode
     // problem.  If the interface isn't implemented by the receiver class,
     // the VM should throw IncompatibleClassChangeError.  linkResolver checks
     // this too but that's only if the entry isn't already resolved, so we
     // need to check again.
     __ br_notnull( Rtemp, false, Assembler::pt, ok);
     __ delayed()->nop();
     call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_IncompatibleClassChangeError));
     __ should_not_reach_here();
     __ bind(ok);
     __ verify_oop(Rtemp);
   }
   __ verify_oop(Rinterface);
   __ cmp(Rinterface, Rtemp);
   __ brx(Assembler::notEqual, true, Assembler::pn, search);
   __ delayed()->add(Rscratch, itableOffsetEntry::size() * wordSize, Rscratch);
   // entry found and Rscratch points to it
   __ ld(Rscratch, itableOffsetEntry::offset_offset_in_bytes(), Rscratch);
   assert(itableMethodEntry::method_offset_in_bytes() == 0, "adjust instruction below");
   __ sll(Rindex, exact_log2(itableMethodEntry::size() * wordSize), Rindex);       // Rindex *= 8;
   __ add(Rscratch, Rindex, Rscratch);
   __ ld_ptr(RklassOop, Rscratch, G5_method);
   // Check for abstract method error.
   {
     Label ok;
     __ tst(G5_method);
     __ brx(Assembler::notZero, false, Assembler::pt, ok);
     __ delayed()->nop();
     call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError));
     __ should_not_reach_here();
     __ bind(ok);
   }
   Register Rcall = Rinterface;
   assert_different_registers(Rcall, G5_method, Gargs, Rret);
   __ verify_oop(G5_method);
   __ call_from_interpreter(Rcall, Gargs, Rret);
 }
 void TemplateTable::invokedynamic(int byte_no) {
   transition(vtos, vtos);
   assert(byte_no == f1_oop, "use this argument");
   if (!EnableInvokeDynamic) {
     // We should not encounter this bytecode if !EnableInvokeDynamic.
     // The verifier will stop it.  However, if we get past the verifier,
     // this will stop the thread in a reasonable way, without crashing the JVM.
     __ call_VM(noreg, CAST_FROM_FN_PTR(address,
                      InterpreterRuntime::throw_IncompatibleClassChangeError));
     // the call_VM checks for exception, so we should never return here.
     __ should_not_reach_here();
     return;
   }
   // G5: CallSite object (f1)
   // XX: unused (f2)
   // XX: flags (unused)
   Register G5_callsite = G5_method;
   Register Rscratch    = G3_scratch;
   Register Rtemp       = G1_scratch;
   Register Rret        = Lscratch;
   load_invoke_cp_cache_entry(byte_no, G5_callsite, noreg, Rret,
                              /*virtual*/ false, /*vfinal*/ false, /*indy*/ true);
   __ mov(SP, O5_savedSP);  // record SP that we wanted the callee to restore
   __ verify_oop(G5_callsite);
   // profile this call
   __ profile_call(O4);
   // get return address
   AddressLiteral table(Interpreter::return_5_addrs_by_index_table());
   __ set(table, Rtemp);
   __ srl(Rret, ConstantPoolCacheEntry::tosBits, Rret);  // get return type
   // Make sure we don't need to mask Rret for tosBits after the above shift
   ConstantPoolCacheEntry::verify_tosBits();
   __ sll(Rret, LogBytesPerWord, Rret);
   __ ld_ptr(Rtemp, Rret, Rret);  // get return address
   __ ld_ptr(G5_callsite, __ delayed_value(java_dyn_CallSite::target_offset_in_bytes, Rscratch), G3_method_handle);
   __ null_check(G3_method_handle);
   // Adjust Rret first so Llast_SP can be same as Rret
   __ add(Rret, -frame::pc_return_offset, O7);
   __ add(Lesp, BytesPerWord, Gargs);  // setup parameter pointer
   __ jump_to_method_handle_entry(G3_method_handle, Rtemp, /* emit_delayed_nop */ false);
   // Record SP so we can remove any stack space allocated by adapter transition
   __ delayed()->mov(SP, Llast_SP);
 }
 //----------------------------------------------------------------------------------------------------
 // Allocation
 void TemplateTable::_new() {
   transition(vtos, atos);
   Label slow_case;
   Label done;
   Label initialize_header;
   Label initialize_object;  // including clearing the fields
   Register RallocatedObject = Otos_i;
   Register RinstanceKlass = O1;
   Register Roffset = O3;
   Register Rscratch = O4;
   __ get_2_byte_integer_at_bcp(1, Rscratch, Roffset, InterpreterMacroAssembler::Unsigned);
   __ get_cpool_and_tags(Rscratch, G3_scratch);
   // make sure the class we're about to instantiate has been resolved
   // This is done before loading instanceKlass to be consistent with the order
   // how Constant Pool is updated (see constantPoolOopDesc::klass_at_put)
   __ add(G3_scratch, typeArrayOopDesc::header_size(T_BYTE) * wordSize, G3_scratch);
   __ ldub(G3_scratch, Roffset, G3_scratch);
   __ cmp(G3_scratch, JVM_CONSTANT_Class);
   __ br(Assembler::notEqual, false, Assembler::pn, slow_case);
   __ delayed()->sll(Roffset, LogBytesPerWord, Roffset);
   // get instanceKlass
   //__ sll(Roffset, LogBytesPerWord, Roffset);        // executed in delay slot
   __ add(Roffset, sizeof(constantPoolOopDesc), Roffset);
   __ ld_ptr(Rscratch, Roffset, RinstanceKlass);
   // make sure klass is fully initialized:
   __ ld(RinstanceKlass, instanceKlass::init_state_offset_in_bytes() + sizeof(oopDesc), G3_scratch);
   __ cmp(G3_scratch, instanceKlass::fully_initialized);
   __ br(Assembler::notEqual, false, Assembler::pn, slow_case);
   __ delayed()->ld(RinstanceKlass, Klass::layout_helper_offset_in_bytes() + sizeof(oopDesc), Roffset);
   // get instance_size in instanceKlass (already aligned)
   //__ ld(RinstanceKlass, Klass::layout_helper_offset_in_bytes() + sizeof(oopDesc), Roffset);
   // make sure klass does not have has_finalizer, or is abstract, or interface or java/lang/Class
   __ btst(Klass::_lh_instance_slow_path_bit, Roffset);
   __ br(Assembler::notZero, false, Assembler::pn, slow_case);
   __ delayed()->nop();
   // allocate the instance
   // 1) Try to allocate in the TLAB
   // 2) if fail, and the TLAB is not full enough to discard, allocate in the shared Eden
   // 3) if the above fails (or is not applicable), go to a slow case
   // (creates a new TLAB, etc.)
   const bool allow_shared_alloc =
     Universe::heap()->supports_inline_contig_alloc() && !CMSIncrementalMode;
   if(UseTLAB) {
     Register RoldTopValue = RallocatedObject;
     Register RtopAddr = G3_scratch, RtlabWasteLimitValue = G3_scratch;
     Register RnewTopValue = G1_scratch;
     Register RendValue = Rscratch;
     Register RfreeValue = RnewTopValue;
     // check if we can allocate in the TLAB
     __ ld_ptr(G2_thread, in_bytes(JavaThread::tlab_top_offset()), RoldTopValue); // sets up RalocatedObject
     __ ld_ptr(G2_thread, in_bytes(JavaThread::tlab_end_offset()), RendValue);
     __ add(RoldTopValue, Roffset, RnewTopValue);
     // if there is enough space, we do not CAS and do not clear
     __ cmp(RnewTopValue, RendValue);
     if(ZeroTLAB) {
       // the fields have already been cleared
       __ brx(Assembler::lessEqualUnsigned, true, Assembler::pt, initialize_header);
     } else {
       // initialize both the header and fields
       __ brx(Assembler::lessEqualUnsigned, true, Assembler::pt, initialize_object);
     }
     __ delayed()->st_ptr(RnewTopValue, G2_thread, in_bytes(JavaThread::tlab_top_offset()));
     if (allow_shared_alloc) {
     // Check if tlab should be discarded (refill_waste_limit >= free)
     __ ld_ptr(G2_thread, in_bytes(JavaThread::tlab_refill_waste_limit_offset()), RtlabWasteLimitValue);
     __ sub(RendValue, RoldTopValue, RfreeValue);
 #ifdef _LP64
     __ srlx(RfreeValue, LogHeapWordSize, RfreeValue);
 #else
     __ srl(RfreeValue, LogHeapWordSize, RfreeValue);
 #endif
     __ cmp(RtlabWasteLimitValue, RfreeValue);
     __ brx(Assembler::greaterEqualUnsigned, false, Assembler::pt, slow_case); // tlab waste is small
     __ delayed()->nop();
     // increment waste limit to prevent getting stuck on this slow path
     __ add(RtlabWasteLimitValue, ThreadLocalAllocBuffer::refill_waste_limit_increment(), RtlabWasteLimitValue);
     __ st_ptr(RtlabWasteLimitValue, G2_thread, in_bytes(JavaThread::tlab_refill_waste_limit_offset()));
     } else {
       // No allocation in the shared eden.
       __ br(Assembler::always, false, Assembler::pt, slow_case);
       __ delayed()->nop();
     }
   }
   // Allocation in the shared Eden
   if (allow_shared_alloc) {
     Register RoldTopValue = G1_scratch;
     Register RtopAddr = G3_scratch;
     Register RnewTopValue = RallocatedObject;
     Register RendValue = Rscratch;
     __ set((intptr_t)Universe::heap()->top_addr(), RtopAddr);
     Label retry;
     __ bind(retry);
     __ set((intptr_t)Universe::heap()->end_addr(), RendValue);
     __ ld_ptr(RendValue, 0, RendValue);
     __ ld_ptr(RtopAddr, 0, RoldTopValue);
     __ add(RoldTopValue, Roffset, RnewTopValue);
     // RnewTopValue contains the top address after the new object
     // has been allocated.
     __ cmp(RnewTopValue, RendValue);
     __ brx(Assembler::greaterUnsigned, false, Assembler::pn, slow_case);
     __ delayed()->nop();
     __ casx_under_lock(RtopAddr, RoldTopValue, RnewTopValue,
       VM_Version::v9_instructions_work() ? NULL :
       (address)StubRoutines::Sparc::atomic_memory_operation_lock_addr());
     // if someone beat us on the allocation, try again, otherwise continue
     __ cmp(RoldTopValue, RnewTopValue);
     __ brx(Assembler::notEqual, false, Assembler::pn, retry);
     __ delayed()->nop();
   }
   if (UseTLAB || Universe::heap()->supports_inline_contig_alloc()) {
     // clear object fields
     __ bind(initialize_object);
     __ deccc(Roffset, sizeof(oopDesc));
     __ br(Assembler::zero, false, Assembler::pt, initialize_header);
     __ delayed()->add(RallocatedObject, sizeof(oopDesc), G3_scratch);
     // initialize remaining object fields
     { Label loop;
       __ subcc(Roffset, wordSize, Roffset);
       __ bind(loop);
       //__ subcc(Roffset, wordSize, Roffset);      // executed above loop or in delay slot
       __ st_ptr(G0, G3_scratch, Roffset);
       __ br(Assembler::notEqual, false, Assembler::pt, loop);
       __ delayed()->subcc(Roffset, wordSize, Roffset);
     }
     __ br(Assembler::always, false, Assembler::pt, initialize_header);
     __ delayed()->nop();
   }
   // slow case
   __ bind(slow_case);
   __ get_2_byte_integer_at_bcp(1, G3_scratch, O2, InterpreterMacroAssembler::Unsigned);
   __ get_constant_pool(O1);
   call_VM(Otos_i, CAST_FROM_FN_PTR(address, InterpreterRuntime::_new), O1, O2);
   __ ba(false, done);
   __ delayed()->nop();
   // Initialize the header: mark, klass
   __ bind(initialize_header);
   if (UseBiasedLocking) {
     __ ld_ptr(RinstanceKlass, Klass::prototype_header_offset_in_bytes() + sizeof(oopDesc), G4_scratch);
   } else {
     __ set((intptr_t)markOopDesc::prototype(), G4_scratch);
   }
   __ st_ptr(G4_scratch, RallocatedObject, oopDesc::mark_offset_in_bytes());       // mark
   __ store_klass_gap(G0, RallocatedObject);         // klass gap if compressed
   __ store_klass(RinstanceKlass, RallocatedObject); // klass (last for cms)
   {
     SkipIfEqual skip_if(
       _masm, G4_scratch, &DTraceAllocProbes, Assembler::zero);
     // Trigger dtrace event
     __ push(atos);
     __ call_VM_leaf(noreg,
        CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc), O0);
     __ pop(atos);
   }
   // continue
   __ bind(done);
 }
 void TemplateTable::newarray() {
   transition(itos, atos);
   __ ldub(Lbcp, 1, O1);
      call_VM(Otos_i, CAST_FROM_FN_PTR(address, InterpreterRuntime::newarray), O1, Otos_i);
 }
 void TemplateTable::anewarray() {
   transition(itos, atos);
   __ get_constant_pool(O1);
   __ get_2_byte_integer_at_bcp(1, G4_scratch, O2, InterpreterMacroAssembler::Unsigned);
      call_VM(Otos_i, CAST_FROM_FN_PTR(address, InterpreterRuntime::anewarray), O1, O2, Otos_i);
 }
 void TemplateTable::arraylength() {
   transition(atos, itos);
   Label ok;
   __ verify_oop(Otos_i);
   __ tst(Otos_i);
   __ throw_if_not_1_x( Assembler::notZero, ok );
   __ delayed()->ld(Otos_i, arrayOopDesc::length_offset_in_bytes(), Otos_i);
   __ throw_if_not_2( Interpreter::_throw_NullPointerException_entry, G3_scratch, ok);
 }
 void TemplateTable::checkcast() {
   transition(atos, atos);
   Label done, is_null, quicked, cast_ok, resolved;
   Register Roffset = G1_scratch;
   Register RobjKlass = O5;
   Register RspecifiedKlass = O4;
   // Check for casting a NULL
   __ br_null(Otos_i, false, Assembler::pn, is_null);
   __ delayed()->nop();
   // Get value klass in RobjKlass
   __ load_klass(Otos_i, RobjKlass); // get value klass
   // Get constant pool tag
   __ get_2_byte_integer_at_bcp(1, Lscratch, Roffset, InterpreterMacroAssembler::Unsigned);
   // See if the checkcast has been quickened
   __ get_cpool_and_tags(Lscratch, G3_scratch);
   __ add(G3_scratch, typeArrayOopDesc::header_size(T_BYTE) * wordSize, G3_scratch);
   __ ldub(G3_scratch, Roffset, G3_scratch);
   __ cmp(G3_scratch, JVM_CONSTANT_Class);
   __ br(Assembler::equal, true, Assembler::pt, quicked);
   __ delayed()->sll(Roffset, LogBytesPerWord, Roffset);
   __ push_ptr(); // save receiver for result, and for GC
   call_VM(RspecifiedKlass, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc) );
   __ pop_ptr(Otos_i, G3_scratch); // restore receiver
   __ br(Assembler::always, false, Assembler::pt, resolved);
   __ delayed()->nop();
   // Extract target class from constant pool
   __ bind(quicked);
   __ add(Roffset, sizeof(constantPoolOopDesc), Roffset);
   __ ld_ptr(Lscratch, Roffset, RspecifiedKlass);
   __ bind(resolved);
   __ load_klass(Otos_i, RobjKlass); // get value klass
   // Generate a fast subtype check.  Branch to cast_ok if no
   // failure.  Throw exception if failure.
   __ gen_subtype_check( RobjKlass, RspecifiedKlass, G3_scratch, G4_scratch, G1_scratch, cast_ok );
   // Not a subtype; so must throw exception
   __ throw_if_not_x( Assembler::never, Interpreter::_throw_ClassCastException_entry, G3_scratch );
   __ bind(cast_ok);
   if (ProfileInterpreter) {
     __ ba(false, done);
     __ delayed()->nop();
   }
   __ bind(is_null);
   __ profile_null_seen(G3_scratch);
   __ bind(done);
 }
 void TemplateTable::instanceof() {
   Label done, is_null, quicked, resolved;
   transition(atos, itos);
   Register Roffset = G1_scratch;
   Register RobjKlass = O5;
   Register RspecifiedKlass = O4;
   // Check for casting a NULL
   __ br_null(Otos_i, false, Assembler::pt, is_null);
   __ delayed()->nop();
   // Get value klass in RobjKlass
   __ load_klass(Otos_i, RobjKlass); // get value klass
   // Get constant pool tag
   __ get_2_byte_integer_at_bcp(1, Lscratch, Roffset, InterpreterMacroAssembler::Unsigned);
   // See if the checkcast has been quickened
   __ get_cpool_and_tags(Lscratch, G3_scratch);
   __ add(G3_scratch, typeArrayOopDesc::header_size(T_BYTE) * wordSize, G3_scratch);
   __ ldub(G3_scratch, Roffset, G3_scratch);
   __ cmp(G3_scratch, JVM_CONSTANT_Class);
   __ br(Assembler::equal, true, Assembler::pt, quicked);
   __ delayed()->sll(Roffset, LogBytesPerWord, Roffset);
   __ push_ptr(); // save receiver for result, and for GC
   call_VM(RspecifiedKlass, CAST_FROM_FN_PTR(address, InterpreterRuntime::quicken_io_cc) );
   __ pop_ptr(Otos_i, G3_scratch); // restore receiver
   __ br(Assembler::always, false, Assembler::pt, resolved);
   __ delayed()->nop();
   // Extract target class from constant pool
   __ bind(quicked);
   __ add(Roffset, sizeof(constantPoolOopDesc), Roffset);
   __ get_constant_pool(Lscratch);
   __ ld_ptr(Lscratch, Roffset, RspecifiedKlass);
   __ bind(resolved);
   __ load_klass(Otos_i, RobjKlass); // get value klass
   // Generate a fast subtype check.  Branch to cast_ok if no
   // failure.  Return 0 if failure.
   __ or3(G0, 1, Otos_i);      // set result assuming quick tests succeed
   __ gen_subtype_check( RobjKlass, RspecifiedKlass, G3_scratch, G4_scratch, G1_scratch, done );
   // Not a subtype; return 0;
   __ clr( Otos_i );
   if (ProfileInterpreter) {
     __ ba(false, done);
     __ delayed()->nop();
   }
   __ bind(is_null);
   __ profile_null_seen(G3_scratch);
   __ bind(done);
 }
 void TemplateTable::_breakpoint() {
    // Note: We get here even if we are single stepping..
    // jbug inists on setting breakpoints at every bytecode
    // even if we are in single step mode.
    transition(vtos, vtos);
    // get the unpatched byte code
    __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::get_original_bytecode_at), Lmethod, Lbcp);
    __ mov(O0, Lbyte_code);
    // post the breakpoint event
    __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::_breakpoint), Lmethod, Lbcp);
    // complete the execution of original bytecode
    __ dispatch_normal(vtos);
 }
 //----------------------------------------------------------------------------------------------------
 // Exceptions
 void TemplateTable::athrow() {
   transition(atos, vtos);
   // This works because exception is cached in Otos_i which is same as O0,
   // which is same as what throw_exception_entry_expects
   assert(Otos_i == Oexception, "see explanation above");
   __ verify_oop(Otos_i);
   __ null_check(Otos_i);
   __ throw_if_not_x(Assembler::never, Interpreter::throw_exception_entry(), G3_scratch);
 }
 //----------------------------------------------------------------------------------------------------
 // Synchronization
 // See frame_sparc.hpp for monitor block layout.
 // Monitor elements are dynamically allocated by growing stack as needed.
 void TemplateTable::monitorenter() {
   transition(atos, vtos);
   __ verify_oop(Otos_i);
   // Try to acquire a lock on the object
   // Repeat until succeeded (i.e., until
   // monitorenter returns true).
   {   Label ok;
     __ tst(Otos_i);
     __ throw_if_not_1_x( Assembler::notZero,  ok);
     __ delayed()->mov(Otos_i, Lscratch); // save obj
     __ throw_if_not_2( Interpreter::_throw_NullPointerException_entry, G3_scratch, ok);
   }
   assert(O0 == Otos_i, "Be sure where the object to lock is");
   // find a free slot in the monitor block
   // initialize entry pointer
   __ clr(O1); // points to free slot or NULL
   {
     Label entry, loop, exit;
     __ add( __ top_most_monitor(), O2 ); // last one to check
     __ ba( false, entry );
     __ delayed()->mov( Lmonitors, O3 ); // first one to check
     __ bind( loop );
     __ verify_oop(O4);          // verify each monitor's oop
     __ tst(O4); // is this entry unused?
     if (VM_Version::v9_instructions_work())
       __ movcc( Assembler::zero, false, Assembler::ptr_cc, O3, O1);
     else {
       Label L;
       __ br( Assembler::zero, true, Assembler::pn, L );
       __ delayed()->mov(O3, O1); // rememeber this one if match
       __ bind(L);
     }
     __ cmp(O4, O0); // check if current entry is for same object
     __ brx( Assembler::equal, false, Assembler::pn, exit );
     __ delayed()->inc( O3, frame::interpreter_frame_monitor_size() * wordSize ); // check next one
     __ bind( entry );
     __ cmp( O3, O2 );
     __ brx( Assembler::lessEqualUnsigned, true, Assembler::pt, loop );
     __ delayed()->ld_ptr(O3, BasicObjectLock::obj_offset_in_bytes(), O4);
     __ bind( exit );
   }
   { Label allocated;
     // found free slot?
     __ br_notnull(O1, false, Assembler::pn, allocated);
     __ delayed()->nop();
     __ add_monitor_to_stack( false, O2, O3 );
     __ mov(Lmonitors, O1);
     __ bind(allocated);
   }
   // Increment bcp to point to the next bytecode, so exception handling for async. exceptions work correctly.
   // The object has already been poped from the stack, so the expression stack looks correct.
   __ inc(Lbcp);
   __ st_ptr(O0, O1, BasicObjectLock::obj_offset_in_bytes()); // store object
   __ lock_object(O1, O0);
   // check if there's enough space on the stack for the monitors after locking
   __ generate_stack_overflow_check(0);
   // The bcp has already been incremented. Just need to dispatch to next instruction.
   __ dispatch_next(vtos);
 }
 void TemplateTable::monitorexit() {
   transition(atos, vtos);
   __ verify_oop(Otos_i);
   __ tst(Otos_i);
   __ throw_if_not_x( Assembler::notZero, Interpreter::_throw_NullPointerException_entry, G3_scratch );
   assert(O0 == Otos_i, "just checking");
   { Label entry, loop, found;
     __ add( __ top_most_monitor(), O2 ); // last one to check
     __ ba(false, entry );
     // use Lscratch to hold monitor elem to check, start with most recent monitor,
     // By using a local it survives the call to the C routine.
     __ delayed()->mov( Lmonitors, Lscratch );
     __ bind( loop );
     __ verify_oop(O4);          // verify each monitor's oop
     __ cmp(O4, O0); // check if current entry is for desired object
     __ brx( Assembler::equal, true, Assembler::pt, found );
     __ delayed()->mov(Lscratch, O1); // pass found entry as argument to monitorexit
     __ inc( Lscratch, frame::interpreter_frame_monitor_size() * wordSize ); // advance to next
     __ bind( entry );
     __ cmp( Lscratch, O2 );
     __ brx( Assembler::lessEqualUnsigned, true, Assembler::pt, loop );
     __ delayed()->ld_ptr(Lscratch, BasicObjectLock::obj_offset_in_bytes(), O4);
     call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
     __ should_not_reach_here();
     __ bind(found);
   }
   __ unlock_object(O1);
 }
 //----------------------------------------------------------------------------------------------------
 // Wide instructions
 void TemplateTable::wide() {
   transition(vtos, vtos);
   __ ldub(Lbcp, 1, G3_scratch);// get next bc
   __ sll(G3_scratch, LogBytesPerWord, G3_scratch);
   AddressLiteral ep(Interpreter::_wentry_point);
   __ set(ep, G4_scratch);
   __ ld_ptr(G4_scratch, G3_scratch, G3_scratch);
   __ jmp(G3_scratch, G0);
   __ delayed()->nop();
   // Note: the Lbcp increment step is part of the individual wide bytecode implementations
 }
 //----------------------------------------------------------------------------------------------------
 // Multi arrays
 void TemplateTable::multianewarray() {
   transition(vtos, atos);
      // put ndims * wordSize into Lscratch
   __ ldub( Lbcp,     3,               Lscratch);
   __ sll(  Lscratch, Interpreter::logStackElementSize, Lscratch);
      // Lesp points past last_dim, so set to O1 to first_dim address
   __ add(  Lesp,     Lscratch,        O1);
      call_VM(Otos_i, CAST_FROM_FN_PTR(address, InterpreterRuntime::multianewarray), O1);
   __ add(  Lesp,     Lscratch,        Lesp); // pop all dimensions off the stack
 }
 #endif /* !CC_INTERP */

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/sparc/vm/templateTable_sparc.cpp@3dc12ef8735e (annotated)

src/cpu/sparc/vm/templateTable_sparc.cpp