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

src/cpu/mips/vm/templateInterpreter_mips_64.cpp@8b305ff8f6b6 (annotated)

src/cpu/mips/vm/templateInterpreter_mips_64.cpp

Mon, 02 Dec 2019 16:01:35 +0800

author: aoqi
date: Mon, 02 Dec 2019 16:01:35 +0800
changeset 9760: 8b305ff8f6b6
parent 9705: 0b27fc8adf1b
child 9854: 0bada3286229
permissions: -rw-r--r--

#11180 Backport of #9871 MIPS port of 7187554: JSR 292: JVMTI PopFrame needs to handle appendix arguments

 /*
  * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2015, 2019, Loongson Technology. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #include "precompiled.hpp"
 #include "asm/macroAssembler.hpp"
 #include "interpreter/bytecodeHistogram.hpp"
 #include "interpreter/interpreter.hpp"
 #include "interpreter/interpreterGenerator.hpp"
 #include "interpreter/interpreterRuntime.hpp"
 #include "interpreter/templateTable.hpp"
 #include "oops/arrayOop.hpp"
 #include "oops/methodData.hpp"
 #include "oops/method.hpp"
 #include "oops/oop.inline.hpp"
 #include "prims/jvmtiExport.hpp"
 #include "prims/jvmtiThreadState.hpp"
 #include "runtime/arguments.hpp"
 #include "runtime/deoptimization.hpp"
 #include "runtime/frame.inline.hpp"
 #include "runtime/sharedRuntime.hpp"
 #include "runtime/stubRoutines.hpp"
 #include "runtime/synchronizer.hpp"
 #include "runtime/timer.hpp"
 #include "runtime/vframeArray.hpp"
 #include "utilities/debug.hpp"
 #define __ _masm->
 #ifndef CC_INTERP
 // asm based interpreter deoptimization helpers
 int AbstractInterpreter::size_activation(int max_stack,
                                          int temps,
                                          int extra_args,
                                          int monitors,
                                          int callee_params,
                                          int callee_locals,
                                          bool is_top_frame) {
   // Note: This calculation must exactly parallel the frame setup
   // in AbstractInterpreterGenerator::generate_method_entry.
   // fixed size of an interpreter frame:
   int overhead = frame::sender_sp_offset -
                  frame::interpreter_frame_initial_sp_offset;
   // Our locals were accounted for by the caller (or last_frame_adjust
   // on the transistion) Since the callee parameters already account
   // for the callee's params we only need to account for the extra
   // locals.
   int size = overhead +
          (callee_locals - callee_params)*Interpreter::stackElementWords +
          monitors * frame::interpreter_frame_monitor_size() +
          temps* Interpreter::stackElementWords + extra_args;
   return size;
 }
 const int Interpreter::return_sentinel = 0xfeedbeed;
 const int method_offset = frame::interpreter_frame_method_offset * wordSize;
 const int bci_offset    = frame::interpreter_frame_bcx_offset    * wordSize;
 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize;
 //-----------------------------------------------------------------------------
 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
   address entry = __ pc();
 #ifdef ASSERT
   {
     Label L;
     __ addi(T1, FP, frame::interpreter_frame_monitor_block_top_offset * wordSize);
     __ sub(T1, T1, SP); // T1 = maximal sp for current fp
     __ bgez(T1, L);     // check if frame is complete
     __ delayed()->nop();
     __ stop("interpreter frame not set up");
     __ bind(L);
   }
 #endif // ASSERT
   // Restore bcp under the assumption that the current frame is still
   // interpreted
   // FIXME: please change the func restore_bcp
   // S0 is the conventional register for bcp
   __ restore_bcp();
   // expression stack must be empty before entering the VM if an
   // exception happened
   __ empty_expression_stack();
   // throw exception
   // FIXME: why do not pass parameter thread ?
   __ call_VM(NOREG, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_StackOverflowError));
   return entry;
 }
 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(
         const char* name) {
   address entry = __ pc();
   // expression stack must be empty before entering the VM if an
   // exception happened
   __ empty_expression_stack();
   __ li(A1, (long)name);
   __ call_VM(noreg, CAST_FROM_FN_PTR(address,
   InterpreterRuntime::throw_ArrayIndexOutOfBoundsException), A1, A2);
   return entry;
 }
 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
   address entry = __ pc();
   // expression stack must be empty before entering the VM if an
   // exception happened
   __ empty_expression_stack();
   __ empty_FPU_stack();
   __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ClassCastException),  FSR);
   return entry;
 }
 address TemplateInterpreterGenerator::generate_exception_handler_common(
         const char* name, const char* message, bool pass_oop) {
   assert(!pass_oop || message == NULL, "either oop or message but not both");
   address entry = __ pc();
   // expression stack must be empty before entering the VM if an exception happened
   __ empty_expression_stack();
   // setup parameters
   __ li(A1, (long)name);
   if (pass_oop) {
     __ call_VM(V0,
     CAST_FROM_FN_PTR(address, InterpreterRuntime::create_klass_exception), A1, FSR);
   } else {
     __ li(A2, (long)message);
     __ call_VM(V0,
     CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), A1, A2);
   }
   // throw exception
   __ jmp(Interpreter::throw_exception_entry(), relocInfo::none);
   __ delayed()->nop();
   return entry;
 }
 address TemplateInterpreterGenerator::generate_continuation_for(TosState state) {
   address entry = __ pc();
   // NULL last_sp until next java call
   __ sd(R0,Address(FP, frame::interpreter_frame_last_sp_offset * wordSize));
   __ dispatch_next(state);
   return entry;
 }
 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) {
   address entry = __ pc();
   // Restore stack bottom in case i2c adjusted stack
   __ ld(SP, Address(FP, frame::interpreter_frame_last_sp_offset * wordSize));
   // and NULL it as marker that sp is now tos until next java call
   __ sd(R0, FP, frame::interpreter_frame_last_sp_offset * wordSize);
   __ restore_bcp();
   __ restore_locals();
   // mdp: T8
   // ret: FSR
   // tmp: T9
   if (state == atos) {
     Register mdp = T8;
     Register tmp = T9;
     __ profile_return_type(mdp, FSR, tmp);
   }
   const Register cache = T9;
   const Register index = T3;
   __ get_cache_and_index_at_bcp(cache, index, 1, index_size);
   const Register flags = cache;
   __ dsll(AT, index, Address::times_ptr);
   __ daddu(AT, cache, AT);
   __ lw(flags, AT, in_bytes(ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()));
   __ andi(flags, flags, ConstantPoolCacheEntry::parameter_size_mask);
   __ dsll(AT, flags, Interpreter::stackElementScale());
   __ daddu(SP, SP, AT);
   __ dispatch_next(state, step);
   return entry;
 }
 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state,
                                                                int step) {
   address entry = __ pc();
   // NULL last_sp until next java call
   __ sd(R0, FP, frame::interpreter_frame_last_sp_offset * wordSize);
   __ restore_bcp();
   __ restore_locals();
   // handle exceptions
   {
     Label L;
     const Register thread = TREG;
 #ifndef OPT_THREAD
     __ get_thread(thread);
 #endif
     __ lw(AT, thread, in_bytes(Thread::pending_exception_offset()));
     __ beq(AT, R0, L);
     __ delayed()->nop();
     __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception));
     __ should_not_reach_here();
     __ bind(L);
   }
   __ dispatch_next(state, step);
   return entry;
 }
 int AbstractInterpreter::BasicType_as_index(BasicType type) {
   int i = 0;
   switch (type) {
     case T_BOOLEAN: i = 0; break;
     case T_CHAR   : i = 1; break;
     case T_BYTE   : i = 2; break;
     case T_SHORT  : i = 3; break;
     case T_INT    : // fall through
     case T_LONG   : // fall through
     case T_VOID   : i = 4; break;
     case T_FLOAT  : i = 5; break;
     case T_DOUBLE : i = 6; break;
     case T_OBJECT : // fall through
     case T_ARRAY  : i = 7; break;
     default       : ShouldNotReachHere();
   }
   assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers,
          "index out of bounds");
   return i;
 }
 address TemplateInterpreterGenerator::generate_result_handler_for(
         BasicType type) {
   address entry = __ pc();
   switch (type) {
     case T_BOOLEAN: __ c2bool(V0);             break;
     case T_CHAR   : __ andi(V0, V0, 0xFFFF);   break;
     case T_BYTE   : __ sign_extend_byte (V0);  break;
     case T_SHORT  : __ sign_extend_short(V0);  break;
     case T_INT    : /* nothing to do */        break;
     case T_FLOAT  : /* nothing to do */        break;
     case T_DOUBLE : /* nothing to do */        break;
     case T_OBJECT :
     {
        __ ld(V0, FP, frame::interpreter_frame_oop_temp_offset * wordSize);
       __ verify_oop(V0);         // and verify it
     }
                  break;
     default       : ShouldNotReachHere();
   }
   __ jr(RA);                                  // return from result handler
   __ delayed()->nop();
   return entry;
 }
 address TemplateInterpreterGenerator::generate_safept_entry_for(
         TosState state,
         address runtime_entry) {
   address entry = __ pc();
   __ push(state);
   __ call_VM(noreg, runtime_entry);
   __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
   return entry;
 }
 // Helpers for commoning out cases in the various type of method entries.
 //
 // increment invocation count & check for overflow
 //
 // Note: checking for negative value instead of overflow
 //       so we have a 'sticky' overflow test
 //
 // Rmethod: method
 // T3     : invocation counter
 //
 void InterpreterGenerator::generate_counter_incr(
         Label* overflow,
         Label* profile_method,
         Label* profile_method_continue) {
   Label done;
   if (TieredCompilation) {
     int increment = InvocationCounter::count_increment;
     int mask = ((1 << Tier0InvokeNotifyFreqLog)  - 1) << InvocationCounter::count_shift;
     Label no_mdo;
     if (ProfileInterpreter) {
       // Are we profiling?
       __ ld(FSR, Address(Rmethod, Method::method_data_offset()));
       __ beq(FSR, R0, no_mdo);
       __ delayed()->nop();
       // Increment counter in the MDO
       const Address mdo_invocation_counter(FSR, in_bytes(MethodData::invocation_counter_offset()) +
                                                 in_bytes(InvocationCounter::counter_offset()));
       __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, T3, false, Assembler::zero, overflow);
       __ beq(R0, R0, done);
       __ delayed()->nop();
     }
     __ bind(no_mdo);
     // Increment counter in MethodCounters
     const Address invocation_counter(FSR,
                   MethodCounters::invocation_counter_offset() +
                   InvocationCounter::counter_offset());
     __ get_method_counters(Rmethod, FSR, done);
     __ increment_mask_and_jump(invocation_counter, increment, mask, T3, false, Assembler::zero, overflow);
     __ bind(done);
   } else {
     const Address invocation_counter(FSR, in_bytes(MethodCounters::invocation_counter_offset())
         + in_bytes(InvocationCounter::counter_offset()));
     const Address backedge_counter  (FSR, in_bytes(MethodCounters::backedge_counter_offset())
         + in_bytes(InvocationCounter::counter_offset()));
     __ get_method_counters(Rmethod, FSR, done);
     if (ProfileInterpreter) { // %%% Merge this into methodDataOop
       __ lw(T9, FSR, in_bytes(MethodCounters::interpreter_invocation_counter_offset()));
       __ incrementl(T9, 1);
       __ sw(T9, FSR, in_bytes(MethodCounters::interpreter_invocation_counter_offset()));
     }
     // Update standard invocation counters
     __ lw(T3, invocation_counter);
     __ increment(T3, InvocationCounter::count_increment);
     __ sw(T3, invocation_counter);  // save invocation count
     __ lw(FSR, backedge_counter);  // load backedge counter
     __ li(AT, InvocationCounter::count_mask_value);   // mask out the status bits
     __ andr(FSR, FSR, AT);
     __ dadd(T3, T3, FSR);          // add both counters
     if (ProfileInterpreter && profile_method != NULL) {
       // Test to see if we should create a method data oop
       if (Assembler::is_simm16(InvocationCounter::InterpreterProfileLimit)) {
         __ slti(AT, T3, InvocationCounter::InterpreterProfileLimit);
       } else {
         __ li(AT, (long)&InvocationCounter::InterpreterProfileLimit);
         __ lw(AT, AT, 0);
         __ slt(AT, T3, AT);
       }
       __ bne_far(AT, R0, *profile_method_continue);
       __ delayed()->nop();
       // if no method data exists, go to profile_method
       __ test_method_data_pointer(FSR, *profile_method);
     }
     if (Assembler::is_simm16(CompileThreshold)) {
       __ srl(AT, T3, InvocationCounter::count_shift);
       __ slti(AT, AT, CompileThreshold);
     } else {
       __ li(AT, (long)&InvocationCounter::InterpreterInvocationLimit);
       __ lw(AT, AT, 0);
       __ slt(AT, T3, AT);
     }
     __ beq_far(AT, R0, *overflow);
     __ delayed()->nop();
     __ bind(done);
   }
 }
 void InterpreterGenerator::generate_counter_overflow(Label* do_continue) {
   // Asm interpreter on entry
   // S7 - locals
   // S0 - bcp
   // Rmethod - method
   // FP - interpreter frame
   // On return (i.e. jump to entry_point)
   // Rmethod - method
   // RA - return address of interpreter caller
   // tos - the last parameter to Java method
   // SP - sender_sp
   // the bcp is valid if and only if it's not null
   __ call_VM(NOREG, CAST_FROM_FN_PTR(address,
       InterpreterRuntime::frequency_counter_overflow), R0);
   __ ld(Rmethod, FP, method_offset);
   // Preserve invariant that S0/S7 contain bcp/locals of sender frame
   __ b_far(*do_continue);
   __ delayed()->nop();
 }
 // See if we've got enough room on the stack for locals plus overhead.
 // The expression stack grows down incrementally, so the normal guard
 // page mechanism will work for that.
 //
 // NOTE: Since the additional locals are also always pushed (wasn't
 // obvious in generate_method_entry) so the guard should work for them
 // too.
 //
 // Args:
 //      T2: number of additional locals this frame needs (what we must check)
 //      T0: Method*
 //
 void InterpreterGenerator::generate_stack_overflow_check(void) {
   // see if we've got enough room on the stack for locals plus overhead.
   // the expression stack grows down incrementally, so the normal guard
   // page mechanism will work for that.
   //
   // Registers live on entry:
   //
   // T0: Method*
   // T2: number of additional locals this frame needs (what we must check)
   // NOTE:  since the additional locals are also always pushed (wasn't obvious in
   // generate_method_entry) so the guard should work for them too.
   //
   const int entry_size    = frame::interpreter_frame_monitor_size() * wordSize;
   // total overhead size: entry_size + (saved fp thru expr stack bottom).
   // be sure to change this if you add/subtract anything to/from the overhead area
   const int overhead_size = -(frame::interpreter_frame_initial_sp_offset*wordSize)
     + entry_size;
   const int page_size = os::vm_page_size();
   Label after_frame_check;
   // see if the frame is greater than one page in size. If so,
   // then we need to verify there is enough stack space remaining
   // for the additional locals.
   __ move(AT, (page_size - overhead_size) / Interpreter::stackElementSize);
   __ slt(AT, AT, T2);
   __ beq(AT, R0, after_frame_check);
   __ delayed()->nop();
   // compute sp as if this were going to be the last frame on
   // the stack before the red zone
 #ifndef OPT_THREAD
   Register thread = T1;
   __ get_thread(thread);
 #else
   Register thread = TREG;
 #endif
   // locals + overhead, in bytes
   __ dsll(T3, T2, Interpreter::stackElementScale());
   __ daddiu(T3, T3, overhead_size);   // locals * 4 + overhead_size --> T3
 #ifdef ASSERT
   Label stack_base_okay, stack_size_okay;
   // verify that thread stack base is non-zero
   __ ld(AT, thread, in_bytes(Thread::stack_base_offset()));
   __ bne(AT, R0, stack_base_okay);
   __ delayed()->nop();
   __ stop("stack base is zero");
   __ bind(stack_base_okay);
   // verify that thread stack size is non-zero
   __ ld(AT, thread, in_bytes(Thread::stack_size_offset()));
   __ bne(AT, R0, stack_size_okay);
   __ delayed()->nop();
   __ stop("stack size is zero");
   __ bind(stack_size_okay);
 #endif
   // Add stack base to locals and subtract stack size
   __ ld(AT, thread, in_bytes(Thread::stack_base_offset())); // stack_base --> AT
   __ dadd(T3, T3, AT);   // locals * 4 + overhead_size + stack_base--> T3
   __ ld(AT, thread, in_bytes(Thread::stack_size_offset()));  // stack_size --> AT
   __ dsub(T3, T3, AT);  // locals * 4 + overhead_size + stack_base - stack_size --> T3
   // add in the redzone and yellow size
   __ move(AT, (StackRedPages+StackYellowPages) * page_size);
   __ add(T3, T3, AT);
   // check against the current stack bottom
   __ slt(AT, T3, SP);
   __ bne(AT, R0, after_frame_check);
   __ delayed()->nop();
   // Note: the restored frame is not necessarily interpreted.
   // Use the shared runtime version of the StackOverflowError.
   __ move(SP, Rsender);
   assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated");
   __ jmp(StubRoutines::throw_StackOverflowError_entry(), relocInfo::runtime_call_type);
   __ delayed()->nop();
   // all done with frame size check
   __ bind(after_frame_check);
 }
 // Allocate monitor and lock method (asm interpreter)
 // Rmethod - Method*
 void InterpreterGenerator::lock_method(void) {
   // synchronize method
   const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
 #ifdef ASSERT
   { Label L;
     __ lw(T0, Rmethod, in_bytes(Method::access_flags_offset()));
     __ andi(T0, T0, JVM_ACC_SYNCHRONIZED);
     __ bne(T0, R0, L);
     __ delayed()->nop();
     __ stop("method doesn't need synchronization");
     __ bind(L);
   }
 #endif // ASSERT
   // get synchronization object
   {
     Label done;
     const int mirror_offset = in_bytes(Klass::java_mirror_offset());
     __ lw(T0, Rmethod, in_bytes(Method::access_flags_offset()));
     __ andi(T2, T0, JVM_ACC_STATIC);
     __ ld(T0, LVP, Interpreter::local_offset_in_bytes(0));
     __ beq(T2, R0, done);
     __ delayed()->nop();
     __ ld(T0, Rmethod, in_bytes(Method::const_offset()));
     __ ld(T0, T0, in_bytes(ConstMethod::constants_offset()));
     __ ld(T0, T0, ConstantPool::pool_holder_offset_in_bytes());
     __ ld(T0, T0, mirror_offset);
     __ bind(done);
   }
   // add space for monitor & lock
   __ daddi(SP, SP, (-1) * entry_size);           // add space for a monitor entry
   __ sd(SP, FP, frame::interpreter_frame_monitor_block_top_offset * wordSize);
   // set new monitor block top
   __ sd(T0, SP, BasicObjectLock::obj_offset_in_bytes());   // store object
   // FIXME: I do not know what lock_object will do and what it will need
   __ move(c_rarg0, SP);      // object address
   __ lock_object(c_rarg0);
 }
 // Generate a fixed interpreter frame. This is identical setup for
 // interpreted methods and for native methods hence the shared code.
 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
   // [ local var m-1      ] <--- sp
   //   ...
   // [ local var 0        ]
   // [ argumnet word n-1  ] <--- T0(sender's sp)
   //   ...
   // [ argument word 0    ] <--- S7
   // initialize fixed part of activation frame
   // sender's sp in Rsender
   int i = 0;
   __ sd(RA, SP, (-1) * wordSize);   // save return address
   __ sd(FP, SP, (-2) * wordSize);  // save sender's fp
   __ daddiu(FP, SP, (-2) * wordSize);
   __ sd(Rsender, FP, (-++i) * wordSize);  // save sender's sp
   __ sd(R0, FP,(-++i)*wordSize);       //save last_sp as null
   __ sd(LVP, FP, (-++i) * wordSize);  // save locals offset
   __ ld(BCP, Rmethod, in_bytes(Method::const_offset())); // get constMethodOop
   __ daddiu(BCP, BCP, in_bytes(ConstMethod::codes_offset())); // get codebase
   __ sd(Rmethod, FP, (-++i) * wordSize);                              // save Method*
 #ifndef CORE
   if (ProfileInterpreter) {
     Label method_data_continue;
     __ ld(AT, Rmethod,  in_bytes(Method::method_data_offset()));
     __ beq(AT, R0, method_data_continue);
     __ delayed()->nop();
     __ daddi(AT, AT, in_bytes(MethodData::data_offset()));
     __ bind(method_data_continue);
     __ sd(AT, FP,  (-++i) * wordSize);
   } else {
     __ sd(R0, FP, (-++i) * wordSize);
   }
 #endif // !CORE
   __ ld(T2, Rmethod, in_bytes(Method::const_offset()));
   __ ld(T2, T2, in_bytes(ConstMethod::constants_offset()));
   __ ld(T2, T2, ConstantPool::cache_offset_in_bytes());
   __ sd(T2, FP, (-++i) * wordSize);                    // set constant pool cache
   if (native_call) {
     __ sd(R0, FP, (-++i) * wordSize);          // no bcp
   } else {
     __ sd(BCP, FP, (-++i) * wordSize);          // set bcp
   }
   __ daddiu(SP, FP, (-++i) * wordSize);
   __ sd(SP, FP, (-i) * wordSize);               // reserve word for pointer to expression stack bottom
 }
 // End of helpers
 // Various method entries
 //------------------------------------------------------------------------------------------------------------------------
 //
 //
 // Call an accessor method (assuming it is resolved, otherwise drop
 // into vanilla (slow path) entry
 address InterpreterGenerator::generate_accessor_entry(void) {
   // Rmethod: Method*
   // V0: receiver (preserve for slow entry into asm interpreter)
   //  Rsender: senderSP must preserved for slow path, set SP to it on fast path
   address entry_point = __ pc();
   Label xreturn_path;
   // do fastpath for resolved accessor methods
   if (UseFastAccessorMethods) {
     Label slow_path;
     __ li(T2, SafepointSynchronize::address_of_state());
     __ lw(AT, T2, 0);
     __ daddi(AT, AT, -(SafepointSynchronize::_not_synchronized));
     __ bne(AT, R0, slow_path);
     __ delayed()->nop();
     // Code: _aload_0, _(i|a)getfield, _(i|a)return or any rewrites thereof;
     // parameter size = 1
     // Note: We can only use this code if the getfield has been resolved
     //       and if we don't have a null-pointer exception => check for
     //       these conditions first and use slow path if necessary.
     // Rmethod: method
     // V0: receiver
     // [ receiver  ] <-- sp
     __ ld(T0, SP, 0);
     // check if local 0 != NULL and read field
     __ beq(T0, R0, slow_path);
     __ delayed()->nop();
     __ ld(T2, Rmethod, in_bytes(Method::const_offset()));
     __ ld(T2, T2, in_bytes(ConstMethod::constants_offset()));
     // read first instruction word and extract bytecode @ 1 and index @ 2
     __ ld(T3, Rmethod, in_bytes(Method::const_offset()));
     __ lw(T3, T3, in_bytes(ConstMethod::codes_offset()));
     // Shift codes right to get the index on the right.
     // The bytecode fetched looks like <index><0xb4><0x2a>
     __ dsrl(T3, T3, 2 * BitsPerByte);
     // FIXME: maybe it's wrong
     __ dsll(T3, T3, exact_log2(in_words(ConstantPoolCacheEntry::size())));
     __ ld(T2, T2, ConstantPool::cache_offset_in_bytes());
     // T0: local 0
     // Rmethod: method
     // V0: receiver - do not destroy since it is needed for slow path!
     // T1: scratch use which register instead ?
     // T3: constant pool cache index
     // T2: constant pool cache
     // Rsender: send's sp
     // check if getfield has been resolved and read constant pool cache entry
     // check the validity of the cache entry by testing whether _indices field
     // contains Bytecode::_getfield in b1 byte.
     assert(in_words(ConstantPoolCacheEntry::size()) == 4, "adjust shift below");
     __ dsll(T8, T3, Address::times_8);
     __ move(T1, in_bytes(ConstantPoolCache::base_offset()
     + ConstantPoolCacheEntry::indices_offset()));
     __ dadd(T1, T8, T1);
     __ dadd(T1, T1, T2);
     __ lw(T1, T1, 0);
     __ dsrl(T1, T1, 2 * BitsPerByte);
     __ andi(T1, T1, 0xFF);
     __ daddi(T1, T1, (-1) * Bytecodes::_getfield);
     __ bne(T1, R0, slow_path);
     __ delayed()->nop();
     // Note: constant pool entry is not valid before bytecode is resolved
     __ move(T1, in_bytes(ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::f2_offset()));
     __ dadd(T1, T1, T8);
     __ dadd(T1, T1, T2);
     __ lw(AT, T1, 0);
     __ move(T1, in_bytes(ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()));
     __ dadd(T1, T1, T8);
     __ dadd(T1, T1, T2);
     __ lw(T3, T1, 0);
     Label notByte, notBool, notShort, notChar, notObj;
     // Need to differentiate between igetfield, agetfield, bgetfield etc.
     // because they are different sizes.
     // Use the type from the constant pool cache
     __ srl(T3, T3, ConstantPoolCacheEntry::tos_state_shift);
     // Make sure we don't need to mask T3 for tosBits after the above shift
     ConstantPoolCacheEntry::verify_tos_state_shift();
     // btos = 0
     __ bne(T3, R0, notByte);
     __ delayed()->dadd(T0, T0, AT);
     __ lb(V0, T0, 0);
     __ b(xreturn_path);
     __ delayed()->nop();
     //ztos
     __ bind(notByte);
     __ daddi(T1, T3, (-1) * ztos);
     __ bne(T1, R0, notBool);
     __ delayed()->nop();
     __ lb(V0, T0, 0);
     __ b(xreturn_path);
     __ delayed()->nop();
     //stos
     __ bind(notBool);
     __ daddi(T1, T3, (-1) * stos);
     __ bne(T1, R0, notShort);
     __ delayed()->nop();
     __ lh(V0, T0, 0);
     __ b(xreturn_path);
     __ delayed()->nop();
     //ctos
     __ bind(notShort);
     __ daddi(T1, T3, (-1) * ctos);
     __ bne(T1, R0, notChar);
     __ delayed()->nop();
     __ lhu(V0, T0, 0);
     __ b(xreturn_path);
     __ delayed()->nop();
     //atos
     __ bind(notChar);
     __ daddi(T1, T3, (-1) * atos);
     __ bne(T1, R0, notObj);
     __ delayed()->nop();
     //add for compressedoops
     __ load_heap_oop(V0, Address(T0, 0));
     __ b(xreturn_path);
     __ delayed()->nop();
     //itos
     __ bind(notObj);
 #ifdef ASSERT
     Label okay;
     __ daddi(T1, T3, (-1) * itos);
     __ beq(T1, R0, okay);
     __ delayed()->nop();
     __ stop("what type is this?");
     __ bind(okay);
 #endif // ASSERT
     __ lw(V0, T0, 0);
     __ bind(xreturn_path);
     // _ireturn/_areturn
     //FIXME
     __ move(SP, Rsender);//FIXME, set sender's fp to SP
     __ jr(RA);
     __ delayed()->nop();
     // generate a vanilla interpreter entry as the slow path
     __ bind(slow_path);
     (void) generate_normal_entry(false);
   } else {
     (void) generate_normal_entry(false);
   }
   return entry_point;
 }
 // Method entry for java.lang.ref.Reference.get.
 address InterpreterGenerator::generate_Reference_get_entry(void) {
 #if INCLUDE_ALL_GCS
   // Code: _aload_0, _getfield, _areturn
   // parameter size = 1
   //
   // The code that gets generated by this routine is split into 2 parts:
   //    1. The "intrinsified" code for G1 (or any SATB based GC),
   //    2. The slow path - which is an expansion of the regular method entry.
   //
   // Notes:-
   // * In the G1 code we do not check whether we need to block for
   //   a safepoint. If G1 is enabled then we must execute the specialized
   //   code for Reference.get (except when the Reference object is null)
   //   so that we can log the value in the referent field with an SATB
   //   update buffer.
   //   If the code for the getfield template is modified so that the
   //   G1 pre-barrier code is executed when the current method is
   //   Reference.get() then going through the normal method entry
   //   will be fine.
   // * The G1 code can, however, check the receiver object (the instance
   //   of java.lang.Reference) and jump to the slow path if null. If the
   //   Reference object is null then we obviously cannot fetch the referent
   //   and so we don't need to call the G1 pre-barrier. Thus we can use the
   //   regular method entry code to generate the NPE.
   //
   // This code is based on generate_accessor_enty.
   //
   // Rmethod: Method*
   // Rsender: senderSP must preserve for slow path, set SP to it on fast path (Rsender)
   address entry = __ pc();
   const int referent_offset = java_lang_ref_Reference::referent_offset;
   guarantee(referent_offset > 0, "referent offset not initialized");
   if (UseG1GC) {
     Label slow_path;
     // Check if local 0 != NULL
     // If the receiver is null then it is OK to jump to the slow path.
     __ ld(V0, SP, 0);
     __ beq(V0, R0, slow_path);
     __ delayed()->nop();
     // Generate the G1 pre-barrier code to log the value of
     // the referent field in an SATB buffer.
     // Load the value of the referent field.
     const Address field_address(V0, referent_offset);
     __ load_heap_oop(V0, field_address);
     __ push(RA);
     // Generate the G1 pre-barrier code to log the value of
     // the referent field in an SATB buffer.
     __ g1_write_barrier_pre(noreg /* obj */,
                             V0 /* pre_val */,
                             TREG /* thread */,
                             Rmethod /* tmp */,
                             true /* tosca_live */,
                             true /* expand_call */);
     __ pop(RA);
     __ jr(RA);
     __ delayed()->daddu(SP, Rsender, R0);      // set sp to sender sp
     // generate a vanilla interpreter entry as the slow path
     __ bind(slow_path);
     (void) generate_normal_entry(false);
     return entry;
   }
 #endif // INCLUDE_ALL_GCS
   // If G1 is not enabled then attempt to go through the accessor entry point
   // Reference.get is an accessor
   return generate_accessor_entry();
 }
 // Interpreter stub for calling a native method. (asm interpreter)
 // This sets up a somewhat different looking stack for calling the
 // native method than the typical interpreter frame setup.
 address InterpreterGenerator::generate_native_entry(bool synchronized) {
   // determine code generation flags
   bool inc_counter  = UseCompiler || CountCompiledCalls;
   // Rsender: sender's sp
   // Rmethod: Method*
   address entry_point = __ pc();
 #ifndef CORE
   const Address invocation_counter(Rmethod,in_bytes(MethodCounters::invocation_counter_offset() +
   InvocationCounter::counter_offset()));
 #endif
   // get parameter size (always needed)
   // the size in the java stack
   __ ld(V0, Rmethod, in_bytes(Method::const_offset()));
   __ lhu(V0, V0, in_bytes(ConstMethod::size_of_parameters_offset()));
   // native calls don't need the stack size check since they have no expression stack
   // and the arguments are already on the stack and we only add a handful of words
   // to the stack
   // Rmethod: Method*
   // V0: size of parameters
   // Layout of frame at this point
   //
   // [ argument word n-1  ] <--- sp
   //   ...
   // [ argument word 0    ]
   // for natives the size of locals is zero
   // compute beginning of parameters (S7)
   __ dsll(LVP, V0, Address::times_8);
   __ daddiu(LVP, LVP, (-1) * wordSize);
   __ dadd(LVP, LVP, SP);
   // add 2 zero-initialized slots for native calls
   __ daddi(SP, SP, (-2) * wordSize);
   __ sd(R0, SP, 1 * wordSize);  // slot for native oop temp offset (setup via runtime)
   __ sd(R0, SP, 0 * wordSize);  // slot for static native result handler3 (setup via runtime)
   // Layout of frame at this point
   // [ method holder mirror  ] <--- sp
   // [ result type info      ]
   // [ argument word n-1     ] <--- T0
   //   ...
   // [ argument word 0       ] <--- LVP
 #ifndef CORE
   if (inc_counter) __ lw(T3, invocation_counter);  // (pre-)fetch invocation count
 #endif
   // initialize fixed part of activation frame
   generate_fixed_frame(true);
   // after this function, the layout of frame is as following
   //
   // [ monitor block top        ] <--- sp ( the top monitor entry )
   // [ byte code pointer (0)    ] (if native, bcp = 0)
   // [ constant pool cache      ]
   // [ Method*                  ]
   // [ locals offset            ]
   // [ sender's sp              ]
   // [ sender's fp              ]
   // [ return address           ] <--- fp
   // [ method holder mirror     ]
   // [ result type info         ]
   // [ argumnet word n-1        ] <--- sender's sp
   //   ...
   // [ argument word 0          ] <--- S7
   // make sure method is native & not abstract
 #ifdef ASSERT
   __ lw(T0, Rmethod, in_bytes(Method::access_flags_offset()));
   {
     Label L;
     __ andi(AT, T0, JVM_ACC_NATIVE);
     __ bne(AT, R0, L);
     __ delayed()->nop();
     __ stop("tried to execute native method as non-native");
     __ bind(L);
   }
   {
     Label L;
     __ andi(AT, T0, JVM_ACC_ABSTRACT);
     __ beq(AT, R0, L);
     __ delayed()->nop();
     __ stop("tried to execute abstract method in interpreter");
     __ bind(L);
   }
 #endif
   // Since at this point in the method invocation the exception handler
   // would try to exit the monitor of synchronized methods which hasn't
   // been entered yet, we set the thread local variable
   // _do_not_unlock_if_synchronized to true. The remove_activation will
   // check this flag.
   Register thread = TREG;
 #ifndef OPT_THREAD
   __ get_thread(thread);
 #endif
   __ move(AT, (int)true);
   __ sb(AT, thread, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
 #ifndef CORE
   // increment invocation count & check for overflow
   Label invocation_counter_overflow;
   if (inc_counter) {
     generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
   }
   Label continue_after_compile;
   __ bind(continue_after_compile);
 #endif // CORE
   bang_stack_shadow_pages(true);
   // reset the _do_not_unlock_if_synchronized flag
 #ifndef OPT_THREAD
   __ get_thread(thread);
 #endif
   __ sb(R0, thread, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
   // check for synchronized methods
   // Must happen AFTER invocation_counter check and stack overflow check,
   // so method is not locked if overflows.
   if (synchronized) {
     lock_method();
   } else {
     // no synchronization necessary
 #ifdef ASSERT
     {
       Label L;
       __ lw(T0, Rmethod, in_bytes(Method::access_flags_offset()));
       __ andi(AT, T0, JVM_ACC_SYNCHRONIZED);
       __ beq(AT, R0, L);
       __ delayed()->nop();
       __ stop("method needs synchronization");
       __ bind(L);
     }
 #endif
   }
   // after method_lock, the layout of frame is as following
   //
   // [ monitor entry            ] <--- sp
   //   ...
   // [ monitor entry            ]
   // [ monitor block top        ] ( the top monitor entry )
   // [ byte code pointer (0)    ] (if native, bcp = 0)
   // [ constant pool cache      ]
   // [ Method*                  ]
   // [ locals offset            ]
   // [ sender's sp              ]
   // [ sender's fp              ]
   // [ return address           ] <--- fp
   // [ method holder mirror     ]
   // [ result type info         ]
   // [ argumnet word n-1        ] <--- ( sender's sp )
   //   ...
   // [ argument word 0          ] <--- S7
   // start execution
 #ifdef ASSERT
   {
     Label L;
     __ ld(AT, FP, frame::interpreter_frame_monitor_block_top_offset * wordSize);
     __ beq(AT, SP, L);
     __ delayed()->nop();
     __ stop("broken stack frame setup in interpreter in asm");
     __ bind(L);
   }
 #endif
   // jvmti/jvmpi support
   __ notify_method_entry();
   // work registers
   const Register method = Rmethod;
   //const Register thread = T2;
   const Register t      = RT4;
   __ get_method(method);
   __ verify_oop(method);
   {
     Label L, Lstatic;
     __ ld(t,method,in_bytes(Method::const_offset()));
     __ lhu(t, t, in_bytes(ConstMethod::size_of_parameters_offset()));
     // MIPS n64 ABI: caller does not reserve space for the register auguments.
     // A0 and A1(if needed)
     __ lw(AT, Rmethod, in_bytes(Method::access_flags_offset()));
     __ andi(AT, AT, JVM_ACC_STATIC);
     __ beq(AT, R0, Lstatic);
     __ delayed()->nop();
     __ daddiu(t, t, 1);
     __ bind(Lstatic);
     __ daddiu(t, t, -7);
     __ blez(t, L);
     __ delayed()->nop();
     __ dsll(t, t, Address::times_8);
     __ dsub(SP, SP, t);
     __ bind(L);
   }
   __ move(AT, -(StackAlignmentInBytes));
   __ andr(SP, SP, AT);
   __ move(AT, SP);
   // [                          ] <--- sp
   //   ...                        (size of parameters - 8 )
   // [ monitor entry            ]
   //   ...
   // [ monitor entry            ]
   // [ monitor block top        ] ( the top monitor entry )
   // [ byte code pointer (0)    ] (if native, bcp = 0)
   // [ constant pool cache      ]
   // [ Method*                  ]
   // [ locals offset            ]
   // [ sender's sp              ]
   // [ sender's fp              ]
   // [ return address           ] <--- fp
   // [ method holder mirror     ]
   // [ result type info         ]
   // [ argumnet word n-1        ] <--- ( sender's sp )
   //   ...
   // [ argument word 0          ] <--- LVP
   // get signature handler
   {
     Label L;
     __ ld(T9, method, in_bytes(Method::signature_handler_offset()));
     __ bne(T9, R0, L);
     __ delayed()->nop();
     __ call_VM(NOREG, CAST_FROM_FN_PTR(address,
                InterpreterRuntime::prepare_native_call), method);
     __ get_method(method);
     __ ld(T9, method, in_bytes(Method::signature_handler_offset()));
     __ bind(L);
   }
   // call signature handler
   // FIXME: when change codes in InterpreterRuntime, note this point
   // from: begin of parameters
   assert(InterpreterRuntime::SignatureHandlerGenerator::from() == LVP, "adjust this code");
   // to: current sp
   assert(InterpreterRuntime::SignatureHandlerGenerator::to  () == SP, "adjust this code");
   // temp: T3
   assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == t  , "adjust this code");
   __ jalr(T9);
   __ delayed()->nop();
   __ get_method(method);
   //
   // if native function is static, and its second parameter has type length of double word,
   // and first parameter has type length of word, we have to reserve one word
   // for the first parameter, according to mips o32 abi.
   // if native function is not static, and its third parameter has type length of double word,
   // and second parameter has type length of word, we have to reserve one word for the second
   // parameter.
   //
   // result handler is in V0
   // set result handler
   __ sd(V0, FP, (frame::interpreter_frame_result_handler_offset)*wordSize);
 #define FIRSTPARA_SHIFT_COUNT 5
 #define SECONDPARA_SHIFT_COUNT 9
 #define THIRDPARA_SHIFT_COUNT 13
 #define PARA_MASK  0xf
   // pass mirror handle if static call
   {
     Label L;
     const int mirror_offset = in_bytes(Klass::java_mirror_offset());
     __ lw(t, method, in_bytes(Method::access_flags_offset()));
     __ andi(AT, t, JVM_ACC_STATIC);
     __ beq(AT, R0, L);
     __ delayed()->nop();
     // get mirror
     __ ld(t, method, in_bytes(Method:: const_offset()));
     __ ld(t, t, in_bytes(ConstMethod::constants_offset())); //??
     __ ld(t, t, ConstantPool::pool_holder_offset_in_bytes());
     __ ld(t, t, mirror_offset);
     // copy mirror into activation frame
     //__ sw(t, FP, frame::interpreter_frame_oop_temp_offset * wordSize);
     // pass handle to mirror
     __ sd(t, FP, frame::interpreter_frame_oop_temp_offset * wordSize);
     __ daddi(t, FP, frame::interpreter_frame_oop_temp_offset * wordSize);
     __ move(A1, t);
     __ bind(L);
   }
   // [ mthd holder mirror ptr   ] <--- sp  --------------------| (only for static method)
   // [                          ]                              |
   //   ...                        size of parameters(or +1)    |
   // [ monitor entry            ]                              |
   //   ...                                                     |
   // [ monitor entry            ]                              |
   // [ monitor block top        ] ( the top monitor entry )    |
   // [ byte code pointer (0)    ] (if native, bcp = 0)         |
   // [ constant pool cache      ]                              |
   // [ Method*                  ]                              |
   // [ locals offset            ]                              |
   // [ sender's sp              ]                              |
   // [ sender's fp              ]                              |
   // [ return address           ] <--- fp                      |
   // [ method holder mirror     ] <----------------------------|
   // [ result type info         ]
   // [ argumnet word n-1        ] <--- ( sender's sp )
   //   ...
   // [ argument word 0          ] <--- S7
   // get native function entry point
   { Label L;
     __ ld(T9, method, in_bytes(Method::native_function_offset()));
     __ li(V1, SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
     __ bne(V1, T9, L);
     __ delayed()->nop();
     __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), method);
     __ get_method(method);
     __ verify_oop(method);
     __ ld(T9, method, in_bytes(Method::native_function_offset()));
     __ bind(L);
   }
   // pass JNIEnv
   // native function in T9
 #ifndef OPT_THREAD
   __ get_thread(thread);
 #endif
   __ daddi(t, thread, in_bytes(JavaThread::jni_environment_offset()));
   __ move(A0, t);
   // [ jni environment          ] <--- sp
   // [ mthd holder mirror ptr   ] ---------------------------->| (only for static method)
   // [                          ]                              |
   //   ...                        size of parameters           |
   // [ monitor entry            ]                              |
   //   ...                                                     |
   // [ monitor entry            ]                              |
   // [ monitor block top        ] ( the top monitor entry )    |
   // [ byte code pointer (0)    ] (if native, bcp = 0)         |
   // [ constant pool cache      ]                              |
   // [ Method*                  ]                              |
   // [ locals offset            ]                              |
   // [ sender's sp              ]                              |
   // [ sender's fp              ]                              |
   // [ return address           ] <--- fp                      |
   // [ method holder mirror     ] <----------------------------|
   // [ result type info         ]
   // [ argumnet word n-1        ] <--- ( sender's sp )
   //   ...
   // [ argument word 0          ] <--- S7
   // set_last_Java_frame_before_call
   __ sd(FP, thread, in_bytes(JavaThread::last_Java_fp_offset()));
   // Change state to native (we save the return address in the thread, since it might not
   // be pushed on the stack when we do a a stack traversal). It is enough that the pc()
   // points into the right code segment. It does not have to be the correct return pc.
   __ li(t, __ pc());
   __ sd(t, thread, in_bytes(JavaThread::last_Java_pc_offset()));
   __ sd(SP, thread, in_bytes(JavaThread::last_Java_sp_offset()));
   // change thread state
 #ifdef ASSERT
   {
     Label L;
     __ lw(t, thread, in_bytes(JavaThread::thread_state_offset()));
     __ daddi(t, t, (-1) * _thread_in_Java);
     __ beq(t, R0, L);
     __ delayed()->nop();
     __ stop("Wrong thread state in native stub");
     __ bind(L);
   }
 #endif
   __ move(t, _thread_in_native);
   __ sw(t, thread, in_bytes(JavaThread::thread_state_offset()));
   // call native method
   __ jalr(T9);
   __ delayed()->nop();
   // result potentially in V0 or F0
   // via _last_native_pc and not via _last_jave_sp
   // NOTE: the order of theses push(es) is known to frame::interpreter_frame_result.
   //  If the order changes or anything else is added to the stack the code in
   // interpreter_frame_result will have to be changed.
   //FIXME, should modify here
   // save return value to keep the value from being destroyed by other calls
   __ push(dtos);
   __ push(ltos);
   // change thread state
   __ get_thread(thread);
   __ move(t, _thread_in_native_trans);
   __ sw(t, thread, in_bytes(JavaThread::thread_state_offset()));
   if( os::is_MP() ) __ sync(); // Force this write out before the read below
   // check for safepoint operation in progress and/or pending suspend requests
   { Label Continue;
     // Don't use call_VM as it will see a possible pending exception and forward it
     // and never return here preventing us from clearing _last_native_pc down below.
     // Also can't use call_VM_leaf either as it will check to see if BCP & LVP are
     // preserved and correspond to the bcp/locals pointers. So we do a runtime call
     // by hand.
     //
     Label L;
     __ li(AT, SafepointSynchronize::address_of_state());
     __ lw(AT, AT, 0);
     __ bne(AT, R0, L);
     __ delayed()->nop();
     __ lw(AT, thread, in_bytes(JavaThread::suspend_flags_offset()));
     __ beq(AT, R0, Continue);
     __ delayed()->nop();
     __ bind(L);
     __ move(A0, thread);
     __ call(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans),
                              relocInfo::runtime_call_type);
     __ delayed()->nop();
 #ifndef OPT_THREAD
     __ get_thread(thread);
 #endif
     //add for compressedoops
     __ reinit_heapbase();
     __ bind(Continue);
   }
   // change thread state
   __ move(t, _thread_in_Java);
   __ sw(t, thread, in_bytes(JavaThread::thread_state_offset()));
   __ reset_last_Java_frame(thread, true);
   // reset handle block
   __ ld(t, thread, in_bytes(JavaThread::active_handles_offset()));
   __ sw(R0, t, JNIHandleBlock::top_offset_in_bytes());
   // If result was an oop then unbox and save it in the frame
   {
     Label no_oop;
     //FIXME, addi only support 16-bit imeditate
     __ ld(AT, FP, frame::interpreter_frame_result_handler_offset*wordSize);
     __ li(T0, AbstractInterpreter::result_handler(T_OBJECT));
     __ bne(AT, T0, no_oop);
     __ delayed()->nop();
     __ pop(ltos);
     // Unbox oop result, e.g. JNIHandles::resolve value.
     __ resolve_jobject(V0, thread, T9);
     __ sd(V0, FP, (frame::interpreter_frame_oop_temp_offset)*wordSize);
     // keep stack depth as expected by pushing oop which will eventually be discarded
     __ push(ltos);
     __ bind(no_oop);
   }
   {
     Label no_reguard;
     __ lw(t, thread, in_bytes(JavaThread::stack_guard_state_offset()));
     __ move(AT,(int) JavaThread::stack_guard_yellow_disabled);
     __ bne(t, AT, no_reguard);
     __ delayed()->nop();
     __ pushad();
     __ move(S5_heapbase, SP);
     __ move(AT, -StackAlignmentInBytes);
     __ andr(SP, SP, AT);
     __ call(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages), relocInfo::runtime_call_type);
     __ delayed()->nop();
     __ move(SP, S5_heapbase);
     __ popad();
     //add for compressedoops
     __ reinit_heapbase();
     __ bind(no_reguard);
   }
   // restore BCP to have legal interpreter frame,
   // i.e., bci == 0 <=> BCP == code_base()
   // Can't call_VM until bcp is within reasonable.
   __ get_method(method);      // method is junk from thread_in_native to now.
   __ verify_oop(method);
   __ ld(BCP, method, in_bytes(Method::const_offset()));
   __ lea(BCP, Address(BCP, in_bytes(ConstMethod::codes_offset())));
   // handle exceptions (exception handling will handle unlocking!)
   {
     Label L;
     __ lw(t, thread, in_bytes(Thread::pending_exception_offset()));
     __ beq(t, R0, L);
     __ delayed()->nop();
     // Note: At some point we may want to unify this with the code used in
     // call_VM_base();
     // i.e., we should use the StubRoutines::forward_exception code. For now this
     // doesn't work here because the sp is not correctly set at this point.
     __ MacroAssembler::call_VM(noreg,
                                CAST_FROM_FN_PTR(address,
                                InterpreterRuntime::throw_pending_exception));
     __ should_not_reach_here();
     __ bind(L);
   }
   // do unlocking if necessary
   {
     Label L;
     __ lw(t, method, in_bytes(Method::access_flags_offset()));
     __ andi(t, t, JVM_ACC_SYNCHRONIZED);
     __ beq(t, R0, L);
     // the code below should be shared with interpreter macro assembler implementation
     {
       Label unlock;
       // BasicObjectLock will be first in list,
       // since this is a synchronized method. However, need
       // to check that the object has not been unlocked by
       // an explicit monitorexit bytecode.
       __ delayed()->daddi(c_rarg0, FP, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock));
       // address of first monitor
       __ ld(t, c_rarg0, BasicObjectLock::obj_offset_in_bytes());
       __ bne(t, R0, unlock);
       __ delayed()->nop();
       // Entry already unlocked, need to throw exception
       __ MacroAssembler::call_VM(NOREG, CAST_FROM_FN_PTR(address,
       InterpreterRuntime::throw_illegal_monitor_state_exception));
       __ should_not_reach_here();
       __ bind(unlock);
       __ unlock_object(c_rarg0);
     }
     __ bind(L);
   }
   // jvmti/jvmpi support
   // Note: This must happen _after_ handling/throwing any exceptions since
   //       the exception handler code notifies the runtime of method exits
   //       too. If this happens before, method entry/exit notifications are
   //       not properly paired (was bug - gri 11/22/99).
   __ notify_method_exit(false, vtos, InterpreterMacroAssembler::NotifyJVMTI);
   // restore potential result in V0,
   // call result handler to restore potential result in ST0 & handle result
   __ pop(ltos);
   __ pop(dtos);
   __ ld(t, FP, (frame::interpreter_frame_result_handler_offset) * wordSize);
   __ jalr(t);
   __ delayed()->nop();
   // remove activation
   __ ld(SP, FP, frame::interpreter_frame_sender_sp_offset * wordSize); // get sender sp
   __ ld(RA, FP, frame::interpreter_frame_return_addr_offset * wordSize); // get return address
   __ ld(FP, FP, frame::interpreter_frame_sender_fp_offset * wordSize); // restore sender's fp
   __ jr(RA);
   __ delayed()->nop();
 #ifndef CORE
   if (inc_counter) {
     // Handle overflow of counter and compile method
     __ bind(invocation_counter_overflow);
     generate_counter_overflow(&continue_after_compile);
     // entry_point is the beginning of this
     // function and checks again for compiled code
   }
 #endif
   return entry_point;
 }
 //
 // Generic interpreted method entry to (asm) interpreter
 //
 // Layout of frame just at the entry
 //
 //   [ argument word n-1  ] <--- sp
 //     ...
 //   [ argument word 0    ]
 // assume Method* in Rmethod before call this method.
 // prerequisites to the generated stub : the callee Method* in Rmethod
 // note you must save the caller bcp before call the generated stub
 //
 address InterpreterGenerator::generate_normal_entry(bool synchronized) {
   // determine code generation flags
   bool inc_counter  = UseCompiler || CountCompiledCalls;
   // Rmethod: Method*
   // Rsender: sender 's sp
   address entry_point = __ pc();
   const Address invocation_counter(Rmethod,
       in_bytes(MethodCounters::invocation_counter_offset() + InvocationCounter::counter_offset()));
   // get parameter size (always needed)
   __ ld(T3, Rmethod, in_bytes(Method::const_offset()));  //T3 --> Rmethod._constMethod
   __ lhu(V0, T3, in_bytes(ConstMethod::size_of_parameters_offset()));
   // Rmethod: Method*
   // V0: size of parameters
   // Rsender: sender 's sp ,could be different frome sp+ wordSize if we call via c2i
   // get size of locals in words to T2
   __ lhu(T2, T3, in_bytes(ConstMethod::size_of_locals_offset()));
   // T2 = no. of additional locals, locals include parameters
   __ dsub(T2, T2, V0);
   // see if we've got enough room on the stack for locals plus overhead.
   // Layout of frame at this point
   //
   // [ argument word n-1  ] <--- sp
   //   ...
   // [ argument word 0    ]
   generate_stack_overflow_check();
   // after this function, the layout of frame does not change
   // compute beginning of parameters (LVP)
   __ dsll(LVP, V0, LogBytesPerWord);
   __ daddiu(LVP, LVP, (-1) * wordSize);
   __ dadd(LVP, LVP, SP);
   // T2 - # of additional locals
   // allocate space for locals
   // explicitly initialize locals
   {
     Label exit, loop;
     __ beq(T2, R0, exit);
     __ delayed()->nop();
     __ bind(loop);
     __ sd(R0, SP, -1 * wordSize);     // initialize local variables
     __ daddiu(T2, T2, -1);               // until everything initialized
     __ bne(T2, R0, loop);
     __ delayed();
     __ daddiu(SP, SP, (-1) * wordSize); //fill delay slot
     __ bind(exit);
   }
   //
   // [ local var m-1      ] <--- sp
   //   ...
   // [ local var 0        ]
   // [ argument word n-1  ] <--- T0?
   //   ...
   // [ argument word 0    ] <--- LVP
   // initialize fixed part of activation frame
   generate_fixed_frame(false);
   // after this function, the layout of frame is as following
   //
   // [ monitor block top        ] <--- sp ( the top monitor entry )
   // [ byte code pointer        ] (if native, bcp = 0)
   // [ constant pool cache      ]
   // [ Method*                  ]
   // [ locals offset            ]
   // [ sender's sp              ]
   // [ sender's fp              ] <--- fp
   // [ return address           ]
   // [ local var m-1            ]
   //   ...
   // [ local var 0              ]
   // [ argumnet word n-1        ] <--- ( sender's sp )
   //   ...
   // [ argument word 0          ] <--- LVP
   // make sure method is not native & not abstract
 #ifdef ASSERT
   __ ld(AT, Rmethod, in_bytes(Method::access_flags_offset()));
   {
     Label L;
     __ andi(T2, AT, JVM_ACC_NATIVE);
     __ beq(T2, R0, L);
     __ delayed()->nop();
     __ stop("tried to execute native method as non-native");
     __ bind(L);
   }
   {
     Label L;
     __ andi(T2, AT, JVM_ACC_ABSTRACT);
     __ beq(T2, R0, L);
     __ delayed()->nop();
     __ stop("tried to execute abstract method in interpreter");
     __ bind(L);
   }
 #endif
   // Since at this point in the method invocation the exception handler
   // would try to exit the monitor of synchronized methods which hasn't
   // been entered yet, we set the thread local variable
   // _do_not_unlock_if_synchronized to true. The remove_activation will
   // check this flag.
 #ifndef OPT_THREAD
   Register thread = T8;
   __ get_thread(thread);
 #else
   Register thread = TREG;
 #endif
   __ move(AT, (int)true);
   __ sb(AT, thread, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
 #ifndef CORE
   // mdp : T8
   // tmp1: T9
   // tmp2: T2
    __ profile_parameters_type(T8, T9, T2);
   // increment invocation count & check for overflow
   Label invocation_counter_overflow;
   Label profile_method;
   Label profile_method_continue;
   if (inc_counter) {
     generate_counter_incr(&invocation_counter_overflow,
                           &profile_method,
                           &profile_method_continue);
     if (ProfileInterpreter) {
       __ bind(profile_method_continue);
     }
   }
   Label continue_after_compile;
   __ bind(continue_after_compile);
 #endif // CORE
   bang_stack_shadow_pages(false);
   // reset the _do_not_unlock_if_synchronized flag
 #ifndef OPT_THREAD
   __ get_thread(thread);
 #endif
   __ sb(R0, thread, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
   // check for synchronized methods
   // Must happen AFTER invocation_counter check and stack overflow check,
   // so method is not locked if overflows.
   //
   if (synchronized) {
     // Allocate monitor and lock method
     lock_method();
   } else {
     // no synchronization necessary
 #ifdef ASSERT
     { Label L;
       __ lw(AT, Rmethod, in_bytes(Method::access_flags_offset()));
       __ andi(T2, AT, JVM_ACC_SYNCHRONIZED);
       __ beq(T2, R0, L);
       __ delayed()->nop();
       __ stop("method needs synchronization");
       __ bind(L);
     }
 #endif
   }
   // layout of frame after lock_method
   // [ monitor entry            ] <--- sp
   //   ...
   // [ monitor entry            ]
   // [ monitor block top        ] ( the top monitor entry )
   // [ byte code pointer        ] (if native, bcp = 0)
   // [ constant pool cache      ]
   // [ Method*                  ]
   // [ locals offset            ]
   // [ sender's sp              ]
   // [ sender's fp              ]
   // [ return address           ] <--- fp
   // [ local var m-1            ]
   //   ...
   // [ local var 0              ]
   // [ argumnet word n-1        ] <--- ( sender's sp )
   //   ...
   // [ argument word 0          ] <--- LVP
   // start execution
 #ifdef ASSERT
   {
     Label L;
     __ ld(AT, FP, frame::interpreter_frame_monitor_block_top_offset * wordSize);
     __ beq(AT, SP, L);
     __ delayed()->nop();
     __ stop("broken stack frame setup in interpreter in native");
     __ bind(L);
   }
 #endif
   // jvmti/jvmpi support
   __ notify_method_entry();
   __ dispatch_next(vtos);
   // invocation counter overflow
   if (inc_counter) {
     if (ProfileInterpreter) {
       // We have decided to profile this method in the interpreter
       __ bind(profile_method);
       __ call_VM(noreg, CAST_FROM_FN_PTR(address,
                  InterpreterRuntime::profile_method));
       __ set_method_data_pointer_for_bcp();
       __ get_method(Rmethod);
       __ b(profile_method_continue);
       __ delayed()->nop();
     }
     // Handle overflow of counter and compile method
     __ bind(invocation_counter_overflow);
     generate_counter_overflow(&continue_after_compile);
   }
   return entry_point;
 }
 // Entry points
 //
 // Here we generate the various kind of entries into the interpreter.
 // The two main entry type are generic bytecode methods and native
 // call method.  These both come in synchronized and non-synchronized
 // versions but the frame layout they create is very similar. The
 // other method entry types are really just special purpose entries
 // that are really entry and interpretation all in one. These are for
 // trivial methods like accessor, empty, or special math methods.
 //
 // When control flow reaches any of the entry types for the interpreter
 // the following holds ->
 //
 // Arguments:
 //
 // Rmethod: Method*
 // V0: receiver
 //
 //
 // Stack layout immediately at entry
 //
 // [ parameter n-1            ] <--- sp
 //   ...
 // [ parameter 0              ]
 // [ expression stack         ] (caller's java expression stack)
 // Assuming that we don't go to one of the trivial specialized entries
 // the stack will look like below when we are ready to execute the
 // first bytecode (or call the native routine). The register usage
 // will be as the template based interpreter expects (see
 // interpreter_mips_64.hpp).
 //
 // local variables follow incoming parameters immediately; i.e.
 // the return address is moved to the end of the locals).
 //
 // [ monitor entry            ] <--- sp
 //   ...
 // [ monitor entry            ]
 // [ monitor block top        ] ( the top monitor entry )
 // [ byte code pointer        ] (if native, bcp = 0)
 // [ constant pool cache      ]
 // [ Method*                  ]
 // [ locals offset            ]
 // [ sender's sp              ]
 // [ sender's fp              ]
 // [ return address           ] <--- fp
 // [ local var m-1            ]
 //   ...
 // [ local var 0              ]
 // [ argumnet word n-1        ] <--- ( sender's sp )
 //   ...
 // [ argument word 0          ] <--- S7
 address AbstractInterpreterGenerator::generate_method_entry(
                                         AbstractInterpreter::MethodKind kind) {
   // determine code generation flags
   bool synchronized = false;
   address entry_point = NULL;
   switch (kind) {
     case Interpreter::zerolocals             :
       break;
     case Interpreter::zerolocals_synchronized:
       synchronized = true;
       break;
     case Interpreter::native                 :
       entry_point = ((InterpreterGenerator*)this)->generate_native_entry(false);
       break;
     case Interpreter::native_synchronized    :
       entry_point = ((InterpreterGenerator*)this)->generate_native_entry(true);
       break;
     case Interpreter::empty                  :
       entry_point = ((InterpreterGenerator*)this)->generate_empty_entry();
       break;
     case Interpreter::accessor               :
       entry_point = ((InterpreterGenerator*)this)->generate_accessor_entry();
       break;
     case Interpreter::abstract               :
       entry_point = ((InterpreterGenerator*)this)->generate_abstract_entry();
       break;
     case Interpreter::java_lang_math_sin     : // fall thru
     case Interpreter::java_lang_math_cos     : // fall thru
     case Interpreter::java_lang_math_tan     : // fall thru
     case Interpreter::java_lang_math_log     : // fall thru
     case Interpreter::java_lang_math_log10   : // fall thru
     case Interpreter::java_lang_math_pow     : // fall thru
     case Interpreter::java_lang_math_exp     : break;
     case Interpreter::java_lang_math_abs     : // fall thru
     case Interpreter::java_lang_math_sqrt    :
       entry_point = ((InterpreterGenerator*)this)->generate_math_entry(kind);    break;
     case Interpreter::java_lang_ref_reference_get:
       entry_point = ((InterpreterGenerator*)this)->generate_Reference_get_entry(); break;
     default:
       fatal(err_msg("unexpected method kind: %d", kind));
       break;
   }
   if (entry_point) return entry_point;
   return ((InterpreterGenerator*)this)->generate_normal_entry(synchronized);
 }
 // These should never be compiled since the interpreter will prefer
 // the compiled version to the intrinsic version.
 bool AbstractInterpreter::can_be_compiled(methodHandle m) {
   switch (method_kind(m)) {
     case Interpreter::java_lang_math_sin     : // fall thru
     case Interpreter::java_lang_math_cos     : // fall thru
     case Interpreter::java_lang_math_tan     : // fall thru
     case Interpreter::java_lang_math_abs     : // fall thru
     case Interpreter::java_lang_math_log     : // fall thru
     case Interpreter::java_lang_math_log10   : // fall thru
     case Interpreter::java_lang_math_sqrt    : // fall thru
     case Interpreter::java_lang_math_pow     : // fall thru
     case Interpreter::java_lang_math_exp     :
       return false;
     default:
       return true;
   }
 }
 // How much stack a method activation needs in words.
 int AbstractInterpreter::size_top_interpreter_activation(Method* method) {
   const int entry_size    = frame::interpreter_frame_monitor_size();
   // total overhead size: entry_size + (saved fp thru expr stack bottom).
   // be sure to change this if you add/subtract anything to/from the overhead area
   const int overhead_size = -(frame::interpreter_frame_initial_sp_offset) + entry_size;
   const int stub_code = 6;  // see generate_call_stub
   // return overhead_size + method->max_locals() + method->max_stack() + stub_code;
   const int method_stack = (method->max_locals() + method->max_stack()) *
           Interpreter::stackElementWords;
   return overhead_size + method_stack + stub_code;
 }
 void AbstractInterpreter::layout_activation(Method* method,
                                            int tempcount,
                                            int popframe_extra_args,
                                            int moncount,
                                            int caller_actual_parameters,
                                            int callee_param_count,
                                            int callee_locals,
                                            frame* caller,
                                            frame* interpreter_frame,
                                            bool is_top_frame,
                                            bool is_bottom_frame) {
   // Note: This calculation must exactly parallel the frame setup
   // in AbstractInterpreterGenerator::generate_method_entry.
   // If interpreter_frame!=NULL, set up the method, locals, and monitors.
   // The frame interpreter_frame, if not NULL, is guaranteed to be the
   // right size, as determined by a previous call to this method.
   // It is also guaranteed to be walkable even though it is in a skeletal state
   // fixed size of an interpreter frame:
   int max_locals = method->max_locals() * Interpreter::stackElementWords;
   int extra_locals = (method->max_locals() - method->size_of_parameters()) * Interpreter::stackElementWords;
 #ifdef ASSERT
   if (!EnableInvokeDynamic) {
     // @@@ FIXME: Should we correct interpreter_frame_sender_sp in the calling sequences?
     // Probably, since deoptimization doesn't work yet.
     assert(caller->unextended_sp() == interpreter_frame->interpreter_frame_sender_sp(), "Frame not properly walkable");
   }
   assert(caller->sp() == interpreter_frame->interpreter_frame_sender_sp(), "Frame not properly walkable(2)");
 #endif
     interpreter_frame->interpreter_frame_set_method(method);
     // NOTE the difference in using sender_sp and interpreter_frame_sender_sp
     // interpreter_frame_sender_sp is the original sp of the caller (the unextended_sp)
     // and sender_sp is fp+8
     intptr_t* locals = interpreter_frame->sender_sp() + max_locals - 1;
 #ifdef ASSERT
   if (caller->is_interpreted_frame()) {
     assert(locals < caller->fp() + frame::interpreter_frame_initial_sp_offset, "bad placement");
   }
 #endif
   interpreter_frame->interpreter_frame_set_locals(locals);
   BasicObjectLock* montop = interpreter_frame->interpreter_frame_monitor_begin();
   BasicObjectLock* monbot = montop - moncount;
   interpreter_frame->interpreter_frame_set_monitor_end(montop - moncount);
   //set last sp;
   intptr_t*  sp = (intptr_t*) monbot - tempcount*Interpreter::stackElementWords -
                       popframe_extra_args;
   interpreter_frame->interpreter_frame_set_last_sp(sp);
   // All frames but the initial interpreter frame we fill in have a
   // value for sender_sp that allows walking the stack but isn't
   // truly correct. Correct the value here.
   //
     if (extra_locals != 0 &&
         interpreter_frame->sender_sp() == interpreter_frame->interpreter_frame_sender_sp() ) {
       interpreter_frame->set_interpreter_frame_sender_sp(caller->sp() + extra_locals);
     }
     *interpreter_frame->interpreter_frame_cache_addr() = method->constants()->cache();
 }
 //-----------------------------------------------------------------------------
 // Exceptions
 void TemplateInterpreterGenerator::generate_throw_exception() {
   // Entry point in previous activation (i.e., if the caller was
   // interpreted)
   Interpreter::_rethrow_exception_entry = __ pc();
   // Restore sp to interpreter_frame_last_sp even though we are going
   // to empty the expression stack for the exception processing.
   __ sd(R0,FP, frame::interpreter_frame_last_sp_offset * wordSize);
   // V0: exception
   // V1: return address/pc that threw exception
   __ restore_bcp();                              // BCP points to call/send
   __ restore_locals();
   //add for compressedoops
   __ reinit_heapbase();
   // Entry point for exceptions thrown within interpreter code
   Interpreter::_throw_exception_entry = __ pc();
   // expression stack is undefined here
   // V0: exception
   // BCP: exception bcp
   __ verify_oop(V0);
   // expression stack must be empty before entering the VM in case of an exception
   __ empty_expression_stack();
   // find exception handler address and preserve exception oop
   __ move(A1, V0);
   __ call_VM(V1, CAST_FROM_FN_PTR(address, InterpreterRuntime::exception_handler_for_exception), A1);
   // V0: exception handler entry point
   // V1: preserved exception oop
   // S0: bcp for exception handler
   __ daddi(SP, SP, (-1) * wordSize);
   __ sd(V1, SP, 0);                              // push exception which is now the only value on the stack
   __ jr(V0);                                   // jump to exception handler (may be _remove_activation_entry!)
   __ delayed()->nop();
   // If the exception is not handled in the current frame the frame is removed and
   // the exception is rethrown (i.e. exception continuation is _rethrow_exception).
   //
   // Note: At this point the bci is still the bxi for the instruction which caused
   //       the exception and the expression stack is empty. Thus, for any VM calls
   //       at this point, GC will find a legal oop map (with empty expression stack).
   // In current activation
   // V0: exception
   // BCP: exception bcp
   //
   // JVMTI PopFrame support
   //
   Interpreter::_remove_activation_preserving_args_entry = __ pc();
   __ empty_expression_stack();
   // Set the popframe_processing bit in pending_popframe_condition indicating that we are
   // currently handling popframe, so that call_VMs that may happen later do not trigger new
   // popframe handling cycles.
 #ifndef OPT_THREAD
   Register thread = T2;
   __ get_thread(T2);
 #else
   Register thread = TREG;
 #endif
   __ lw(T3, thread, in_bytes(JavaThread::popframe_condition_offset()));
   __ ori(T3, T3, JavaThread::popframe_processing_bit);
   __ sw(T3, thread, in_bytes(JavaThread::popframe_condition_offset()));
 #ifndef CORE
   {
     // Check to see whether we are returning to a deoptimized frame.
     // (The PopFrame call ensures that the caller of the popped frame is
     // either interpreted or compiled and deoptimizes it if compiled.)
     // In this case, we can't call dispatch_next() after the frame is
     // popped, but instead must save the incoming arguments and restore
     // them after deoptimization has occurred.
     //
     // Note that we don't compare the return PC against the
     // deoptimization blob's unpack entry because of the presence of
     // adapter frames in C2.
     Label caller_not_deoptimized;
     __ ld(A0, FP, frame::return_addr_offset * wordSize);
     __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), A0);
     __ bne(V0, R0, caller_not_deoptimized);
     __ delayed()->nop();
     // Compute size of arguments for saving when returning to deoptimized caller
     __ get_method(A1);
     __ verify_oop(A1);
     __ ld(A1, A1, in_bytes(Method::const_offset()));
     __ lhu(A1, A1, in_bytes(ConstMethod::size_of_parameters_offset()));
     __ shl(A1, Interpreter::logStackElementSize);
     __ restore_locals();
     __ dsub(A2, LVP, A1);
     __ daddiu(A2, A2, wordSize);
     // Save these arguments
 #ifndef OPT_THREAD
     __ get_thread(A0);
 #else
     __ move(A0, TREG);
 #endif
     __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::popframe_preserve_args), A0, A1, A2);
     __ remove_activation(vtos, T9, false, false, false);
     // Inform deoptimization that it is responsible for restoring these arguments
 #ifndef OPT_THREAD
     __ get_thread(thread);
 #endif
     __ move(AT, JavaThread::popframe_force_deopt_reexecution_bit);
     __ sw(AT, thread, in_bytes(JavaThread::popframe_condition_offset()));
     // Continue in deoptimization handler
     __ jr(T9);
     __ delayed()->nop();
     __ bind(caller_not_deoptimized);
   }
 #endif /* !CORE */
   __ remove_activation(vtos, T3,
                        /* throw_monitor_exception */ false,
                        /* install_monitor_exception */ false,
                        /* notify_jvmdi */ false);
   // Clear the popframe condition flag
   // Finish with popframe handling
   // A previous I2C followed by a deoptimization might have moved the
   // outgoing arguments further up the stack. PopFrame expects the
   // mutations to those outgoing arguments to be preserved and other
   // constraints basically require this frame to look exactly as
   // though it had previously invoked an interpreted activation with
   // no space between the top of the expression stack (current
   // last_sp) and the top of stack. Rather than force deopt to
   // maintain this kind of invariant all the time we call a small
   // fixup routine to move the mutated arguments onto the top of our
   // expression stack if necessary.
   __ move(T8, SP);
   __ ld(A2, FP, frame::interpreter_frame_last_sp_offset * wordSize);
 #ifndef OPT_THREAD
   __ get_thread(thread);
 #endif
   // PC must point into interpreter here
   __ set_last_Java_frame(thread, noreg, FP, __ pc());
   __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), thread, T8, A2);
   __ reset_last_Java_frame(thread, true);
   // Restore the last_sp and null it out
   __ ld(SP, FP, frame::interpreter_frame_last_sp_offset * wordSize);
   __ sd(R0, FP, frame::interpreter_frame_last_sp_offset * wordSize);
   __ move(AT, JavaThread::popframe_inactive);
   __ sw(AT, thread, in_bytes(JavaThread::popframe_condition_offset()));
   // Finish with popframe handling
   __ restore_bcp();
   __ restore_locals();
 #ifndef CORE
   // The method data pointer was incremented already during
   // call profiling. We have to restore the mdp for the current bcp.
   if (ProfileInterpreter) {
     __ set_method_data_pointer_for_bcp();
   }
 #endif // !CORE
   // Clear the popframe condition flag
 #ifndef OPT_THREAD
   __ get_thread(thread);
 #endif
   __ move(AT, JavaThread::popframe_inactive);
   __ sw(AT, thread, in_bytes(JavaThread::popframe_condition_offset()));
 #if INCLUDE_JVMTI
   {
     Label L_done;
     __ lbu(AT, BCP, 0);
     __ daddiu(AT, AT, -1 * Bytecodes::_invokestatic);
     __ bne(AT, R0, L_done);
     __ delayed()->nop();
     // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call.
     // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL.
     __ get_method(T9);
     __ ld(T8, LVP, 0);
     __ call_VM(T8, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), T8, T9, BCP);
     __ beq(T8, R0, L_done);
     __ delayed()->nop();
     __ sd(T8, SP, 0);
     __ bind(L_done);
   }
 #endif // INCLUDE_JVMTI
   __ dispatch_next(vtos);
   // end of PopFrame support
   Interpreter::_remove_activation_entry = __ pc();
   // preserve exception over this code sequence
   __ ld(T0, SP, 0);
   __ daddi(SP, SP, wordSize);
 #ifndef OPT_THREAD
   __ get_thread(thread);
 #endif
   __ sd(T0, thread, in_bytes(JavaThread::vm_result_offset()));
   // remove the activation (without doing throws on illegalMonitorExceptions)
   __ remove_activation(vtos, T3, false, true, false);
   // restore exception
   __ get_vm_result(T0, thread);
   __ verify_oop(T0);
   // In between activations - previous activation type unknown yet
   // compute continuation point - the continuation point expects
   // the following registers set up:
   //
   // T0: exception
   // T1: return address/pc that threw exception
   // SP: expression stack of caller
   // FP: fp of caller
   __ daddi(SP, SP, (-2) * wordSize);
   __ sd(T0, SP, wordSize);      // save exception
   __ sd(T3, SP, 0);                               // save return address
   __ move(A1, T3);
   __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), thread, A1);
   __ move(T9, V0);                             // save exception handler
   __ ld(V0, SP, wordSize);        // restore exception
   __ ld(V1, SP, 0);                               // restore return address
   __ daddi(SP, SP, 2 * wordSize);
   // Note that an "issuing PC" is actually the next PC after the call
   __ jr(T9);                                   // jump to exception handler of caller
   __ delayed()->nop();
 }
 //
 // JVMTI ForceEarlyReturn support
 //
 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
   address entry = __ pc();
   __ restore_bcp();
   __ restore_locals();
   __ empty_expression_stack();
   __ empty_FPU_stack();
   __ load_earlyret_value(state);
 #ifndef OPT_THREAD
   __ get_thread(TREG);
 #endif
   __ ld_ptr(T9, TREG, in_bytes(JavaThread::jvmti_thread_state_offset()));
   const Address cond_addr(T9, in_bytes(JvmtiThreadState::earlyret_state_offset()));
   // Clear the earlyret state
   __ move(AT, JvmtiThreadState::earlyret_inactive);
   __ sw(AT, cond_addr);
   __ sync();
   __ remove_activation(state, T0,
                          false, /* throw_monitor_exception */
                          false, /* install_monitor_exception */
                          true); /* notify_jvmdi */
   __ sync();
   __ jr(T0);
   __ delayed()->nop();
   return entry;
 } // end of ForceEarlyReturn support
 //-----------------------------------------------------------------------------
 // Helper for vtos entry point generation
 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t,
                                                          address& bep,
                                                          address& cep,
                                                          address& sep,
                                                          address& aep,
                                                          address& iep,
                                                          address& lep,
                                                          address& fep,
                                                          address& dep,
                                                          address& vep) {
   assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
   Label L;
   fep = __ pc(); __ push(ftos); __ b(L); __ delayed()->nop();
   dep = __ pc(); __ push(dtos); __ b(L); __ delayed()->nop();
   lep = __ pc(); __ push(ltos); __ b(L); __ delayed()->nop();
   aep  =__ pc(); __ push(atos); __ b(L); __ delayed()->nop();
   bep = cep = sep =
   iep = __ pc(); __ push(itos);
   vep = __ pc();
   __ bind(L);
   generate_and_dispatch(t);
 }
 //-----------------------------------------------------------------------------
 // Generation of individual instructions
 // helpers for generate_and_dispatch
 InterpreterGenerator::InterpreterGenerator(StubQueue* code)
   : TemplateInterpreterGenerator(code) {
    generate_all(); // down here so it can be "virtual"
 }
 //-----------------------------------------------------------------------------
 // Non-product code
 #ifndef PRODUCT
 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
   address entry = __ pc();
   // prepare expression stack
   __ push(state);       // save tosca
   // tos & tos2
   // trace_bytecode need actually 4 args, the last two is tos&tos2
   // this work fine for x86. but mips o32 call convention will store A2-A3
   // to the stack position it think is the tos&tos2
   // when the expression stack have no more than 2 data, error occur.
   __ ld(A2, SP, 0);
   __ ld(A3, SP, 1 * wordSize);
   // pass arguments & call tracer
   __ call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode), RA, A2, A3);
   __ move(RA, V0);    // make sure return address is not destroyed by pop(state)
   // restore expression stack
   __ pop(state);        // restore tosca
   // return
   __ jr(RA);
   __ delayed()->nop();
   return entry;
 }
 void TemplateInterpreterGenerator::count_bytecode() {
   __ li(T8, (long)&BytecodeCounter::_counter_value);
   __ lw(AT, T8, 0);
   __ daddi(AT, AT, 1);
   __ sw(AT, T8, 0);
 }
 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
   __ li(T8, (long)&BytecodeHistogram::_counters[t->bytecode()]);
   __ lw(AT, T8, 0);
   __ daddi(AT, AT, 1);
   __ sw(AT, T8, 0);
 }
 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
   __ li(T8, (long)&BytecodePairHistogram::_index);
   __ lw(T9, T8, 0);
   __ dsrl(T9, T9, BytecodePairHistogram::log2_number_of_codes);
   __ li(T8, ((long)t->bytecode()) << BytecodePairHistogram::log2_number_of_codes);
   __ orr(T9, T9, T8);
   __ li(T8, (long)&BytecodePairHistogram::_index);
   __ sw(T9, T8, 0);
   __ dsll(T9, T9, 2);
   __ li(T8, (long)BytecodePairHistogram::_counters);
   __ dadd(T8, T8, T9);
   __ lw(AT, T8, 0);
   __ daddi(AT, AT, 1);
   __ sw(AT, T8, 0);
 }
 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
   // Call a little run-time stub to avoid blow-up for each bytecode.
   // The run-time runtime saves the right registers, depending on
   // the tosca in-state for the given template.
   address entry = Interpreter::trace_code(t->tos_in());
   assert(entry != NULL, "entry must have been generated");
   __ call(entry, relocInfo::none);
   __ delayed()->nop();
   //add for compressedoops
   __ reinit_heapbase();
 }
 void TemplateInterpreterGenerator::stop_interpreter_at() {
   Label L;
   __ li(T8, long(&BytecodeCounter::_counter_value));
   __ lw(T8, T8, 0);
   __ move(AT, StopInterpreterAt);
   __ bne(T8, AT, L);
   __ delayed()->nop();
   __ call(CAST_FROM_FN_PTR(address, os::breakpoint), relocInfo::runtime_call_type);
   __ delayed()->nop();
   __ bind(L);
 }
 #endif // !PRODUCT
 #endif // ! CC_INTERP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/mips/vm/templateInterpreter_mips_64.cpp@8b305ff8f6b6 (annotated)

src/cpu/mips/vm/templateInterpreter_mips_64.cpp