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

src/cpu/sparc/vm/templateTable_sparc.cpp@e1162778c1c8 (annotated)

src/cpu/sparc/vm/templateTable_sparc.cpp

Thu, 07 Apr 2011 09:53:20 -0700

author: johnc
date: Thu, 07 Apr 2011 09:53:20 -0700
changeset 2781: e1162778c1c8
parent 2639: 8033953d67ff
child 2784: 92add02409c9
permissions: -rw-r--r--

7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
Summary: A referent object that is only weakly reachable at the start of concurrent marking but is re-attached to the strongly reachable object graph during marking may not be marked as live. This can cause the reference object to be processed prematurely and leave dangling pointers to the referent object. Implement a read barrier for the java.lang.ref.Reference::referent field by intrinsifying the Reference.get() method, and intercepting accesses though JNI, reflection, and Unsafe, so that when a non-null referent object is read it is also logged in an SATB buffer.
Reviewed-by: kvn, iveresov, never, tonyp, dholmes

 /*
  * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #include "precompiled.hpp"
 #include "interpreter/interpreter.hpp"
 #include "interpreter/interpreterRuntime.hpp"
 #include "interpreter/templateTable.hpp"
 #include "memory/universe.inline.hpp"
 #include "oops/methodDataOop.hpp"
 #include "oops/objArrayKlass.hpp"
 #include "oops/oop.inline.hpp"
 #include "prims/methodHandles.hpp"
 #include "runtime/sharedRuntime.hpp"
 #include "runtime/stubRoutines.hpp"
 #include "runtime/synchronizer.hpp"
 #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:
       {
         // Load and record the previous value.
         __ g1_write_barrier_pre(base, index, offset,
                                 noreg /* pre_val */,
                                 tmp, true /*preserve_o_regs*/);
         if (index == noreg ) {
           assert(Assembler::is_simm13(offset), "fix this code");
           __ store_heap_oop(val, base, offset);
         } else {
           __ store_heap_oop(val, base, index);
         }
         // No need for post barrier if storing NULL
         if (val != G0) {
           if (precise) {
             if (index == noreg) {
               __ add(base, offset, base);
             } else {
               __ add(base, index, base);
             }
           }
           __ g1_write_barrier_post(base, val, tmp);
         }
       }
       break;
 #endif // 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);
   Label L_done;
   const Register Rcon_klass = G3_scratch;  // same as Rcache
   const Register Rarray_klass = G4_scratch;  // same as Rscratch
   __ load_klass(Otos_i, Rcon_klass);
   AddressLiteral array_klass_addr((address)Universe::systemObjArrayKlassObj_addr());
   __ load_contents(array_klass_addr, Rarray_klass);
   __ cmp(Rarray_klass, Rcon_klass);
   __ brx(Assembler::notEqual, false, Assembler::pt, L_done);
   __ delayed()->nop();
   __ ld(Address(Otos_i, arrayOopDesc::length_offset_in_bytes()), Rcon_klass);
   __ tst(Rcon_klass);
   __ brx(Assembler::zero, true, Assembler::pt, L_done);
   __ delayed()->clr(Otos_i);    // executed only if branch is taken
   // Load the exception from the system-array which wraps it:
   __ load_heap_oop(Otos_i, arrayOopDesc::base_offset_in_bytes(T_OBJECT), Otos_i);
   __ throw_if_not_x(Assembler::never, Interpreter::throw_exception_entry(), G3_scratch);
   __ bind(L_done);
 }
 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, 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
   __ load_heap_oop(G5_callsite, __ delayed_value(java_lang_invoke_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();
     // bump total bytes allocated by this thread
     // RoldTopValue and RtopAddr are dead, so can use G1 and G3
     __ incr_allocated_bytes(Roffset, G1_scratch, G3_scratch);
   }
   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@e1162778c1c8 (annotated)

src/cpu/sparc/vm/templateTable_sparc.cpp