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

src/cpu/mips/vm/interp_masm_mips_64.cpp@d885f8d65c58 (annotated)

src/cpu/mips/vm/interp_masm_mips_64.cpp

Tue, 26 Jul 2016 17:06:17 +0800

author: fujie
date: Tue, 26 Jul 2016 17:06:17 +0800
changeset 41: d885f8d65c58
parent 29: 6c147e7e4605
child 63: d7fbeef71c31
permissions: -rw-r--r--

Add multiply word to GPR instruction (mul) in MIPS assembler.

 /*
  * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2015, 2016, 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 "interp_masm_mips_64.hpp"
 #include "interpreter/interpreter.hpp"
 #include "interpreter/interpreterRuntime.hpp"
 #include "oops/arrayOop.hpp"
 #include "oops/markOop.hpp"
 #include "oops/methodData.hpp"
 #include "oops/method.hpp"
 #include "prims/jvmtiExport.hpp"
 #include "prims/jvmtiRedefineClassesTrace.hpp"
 #include "prims/jvmtiThreadState.hpp"
 #include "runtime/basicLock.hpp"
 #include "runtime/biasedLocking.hpp"
 #include "runtime/sharedRuntime.hpp"
 #include "runtime/thread.inline.hpp"
 // Implementation of InterpreterMacroAssembler
 #ifdef CC_INTERP
 void InterpreterMacroAssembler::get_method(Register reg) {
 }
 #endif // CC_INTERP
 void InterpreterMacroAssembler::get_2_byte_integer_at_bcp(Register reg, Register tmp, int offset) {
   /* 2016/5/6 Jin: the runtime address of BCP may be unaligned.
    *   Refer to the SPARC implementation. */
   lbu(reg, BCP, offset+1);
   lbu(tmp, BCP, offset);
 #ifdef _LP64
   dsll(reg, reg, 8);
   daddu(reg, tmp, reg);
 #else
   sll(reg, reg, 8);
   addu(reg, tmp, reg);
 #endif
 }
 void InterpreterMacroAssembler::get_4_byte_integer_at_bcp(Register reg, Register tmp, int offset) {
   assert(reg != tmp, "need separate temp register");
   if (offset & 3) { // Offset unaligned?
     lbu(reg, BCP, offset+3);
     lbu(tmp, BCP, offset+2);
 #ifdef _LP64
     dsll(reg, reg, 8);
     daddu(reg, tmp, reg);
     lbu(tmp, BCP, offset+1);
     dsll(reg, reg, 8);
     daddu(reg, tmp, reg);
     lbu(tmp, BCP, offset);
     dsll(reg, reg, 8);
     daddu(reg, tmp, reg);
 #else
     sll(reg, reg, 8);
     addu(reg, tmp, reg);
     lbu(tmp, BCP, offset+1);
     sll(reg, reg, 8);
     addu(reg, tmp, reg);
     lbu(tmp, BCP, offset);
     sll(reg, reg, 8);
     addu(reg, tmp, reg);
 #endif
   } else {
     lwu(reg, BCP, offset);
   }
 }
 #ifndef CC_INTERP
 void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point,
                                                   int number_of_arguments) {
     // interpreter specific
     //
     // Note: No need to save/restore bcp & locals (r13 & r14) pointer
     //       since these are callee saved registers and no blocking/
     //       GC can happen in leaf calls.
     // Further Note: DO NOT save/restore bcp/locals. If a caller has
     // already saved them so that it can use esi/edi as temporaries
     // then a save/restore here will DESTROY the copy the caller
     // saved! There used to be a save_bcp() that only happened in
     // the ASSERT path (no restore_bcp). Which caused bizarre failures
     // when jvm built with ASSERTs.
     /*
   #ifdef ASSERT
   {
   Label L;
   cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
   jcc(Assembler::equal, L);
   stop("InterpreterMacroAssembler::call_VM_leaf_base:"
   " last_sp != NULL");
   bind(L);
   }
   #endif
   // super call
   MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
   // interpreter specific
   // Used to ASSERT that r13/r14 were equal to frame's bcp/locals
   // but since they may not have been saved (and we don't want to
   // save thme here (see note above) the assert is invalid.
      */
   #ifdef ASSERT
   save_bcp();
   { Label L;
     //cmpl(Address(ebp, frame::interpreter_frame_last_sp_offset * wordSize),
     //NULL_WORD);
     ld(AT,FP,frame::interpreter_frame_last_sp_offset * wordSize);
     // jcc(Assembler::equal, L);
     beq(AT,R0,L);
     delayed()->nop();
     stop("InterpreterMacroAssembler::call_VM_leaf_base: last_sp != NULL");
     bind(L);
   }
   #endif
   // super call
   MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
   // interpreter specific
   #ifdef ASSERT
   { Label L;
     ld(T3, FP, frame::interpreter_frame_bcx_offset * wordSize);
     Assembler::beq(BCP, T3, L);
     delayed()->nop();
     stop("InterpreterMacroAssembler::call_VM_leaf_base: esi not callee saved?");
     bind(L);
   }
   { Label L;
     ld(T3, FP, frame::interpreter_frame_locals_offset * wordSize);
     Assembler::beq(LVP, T3, L);
     delayed()->nop();
     stop("InterpreterMacroAssembler::call_VM_leaf_base: edi not callee saved?");
     bind(L);
   }
   #endif
   }
 void InterpreterMacroAssembler::call_VM_base(Register oop_result,
                                              Register java_thread,
                                              Register last_java_sp,
                                              address  entry_point,
                                              int      number_of_arguments,
                                              bool     check_exceptions) {
 #if 0
 	// interpreter specific
   //
   // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
   //       really make a difference for these runtime calls, since they are
   //       slow anyway. Btw., bcp must be saved/restored since it may change
   //       due to GC.
   // assert(java_thread == noreg , "not expecting a precomputed java thread");
   save_bcp();
 #ifdef ASSERT
   {
     Label L;
     cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
     jcc(Assembler::equal, L);
     stop("InterpreterMacroAssembler::call_VM_leaf_base:"
          " last_sp != NULL");
     bind(L);
   }
 #endif /* ASSERT */
   // super call
   MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp,
                                entry_point, number_of_arguments,
                                check_exceptions);
   // interpreter specific
   restore_bcp();
   restore_locals();
 #endif
 #ifdef ASSERT
 	{ Label L;
 		//  cmpl(Address(ebp, frame::interpreter_frame_last_sp_offset * wordSize),
 		//  NULL_WORD);
 		// jcc(Assembler::equal, L);
 		ld(AT, FP, frame::interpreter_frame_last_sp_offset * wordSize);
 		beq(AT, R0, L);
 		delayed()->nop();
 		stop("InterpreterMacroAssembler::call_VM_base: last_sp != NULL");
 		bind(L);
 	}
 #endif /* ASSERT */
 	// interpreter specific
 	//
 	// Note: Could avoid restoring locals ptr (callee saved) - however doesn't
 	//       really make a difference for these runtime calls, since they are
 	//       slow anyway. Btw., bcp must be saved/restored since it may change
 	//       due to GC.
 	assert(java_thread == noreg , "not expecting a precomputed java thread");
 	save_bcp();
 	// super call
 	MacroAssembler::call_VM_base(oop_result, java_thread, last_java_sp, entry_point, number_of_arguments, check_exceptions);
 	restore_bcp();
 	restore_locals();
 }
 void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) {
   if (JvmtiExport::can_pop_frame()) {
     Label L;
     // Initiate popframe handling only if it is not already being
     // processed.  If the flag has the popframe_processing bit set, it
     // means that this code is called *during* popframe handling - we
     // don't want to reenter.
     // This method is only called just after the call into the vm in
     // call_VM_base, so the arg registers are available.
     /*
 		movl(c_rarg0, Address(r15_thread, JavaThread::popframe_condition_offset()));
     testl(c_rarg0, JavaThread::popframe_pending_bit);
     jcc(Assembler::zero, L);
     testl(c_rarg0, JavaThread::popframe_processing_bit);
     jcc(Assembler::notZero, L);
     // Call Interpreter::remove_activation_preserving_args_entry() to get the
     // address of the same-named entrypoint in the generated interpreter code.
     call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
     jmp(rax);
     bind(L);
 		*/
 		Register pop_cond = java_thread;
 		// Not clear if any other register is available...
 		lw(pop_cond, java_thread, in_bytes(JavaThread::popframe_condition_offset()));
 		andi(AT, pop_cond, JavaThread::popframe_pending_bit);
 		beq(AT, R0, L);
 		delayed()->andi(AT, pop_cond, JavaThread::popframe_processing_bit);
 		bne(AT, R0, L);
 		delayed()->nop();
 		call( CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry), relocInfo::runtime_call_type);
 		delayed()->nop();
 		jr(V0);
 		delayed()->nop();
 		bind(L);
 		get_thread(java_thread);
   }
 }
 void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
 	//T8, thread
 	get_thread(T8);
 	ld_ptr(T8, T8,in_bytes(JavaThread::jvmti_thread_state_offset()));
 	/*
 	   const Address tos_addr (ecx, JvmtiThreadState::earlyret_tos_offset());
 	   const Address oop_addr (ecx, JvmtiThreadState::earlyret_oop_offset());
 	   const Address val_addr (ecx, JvmtiThreadState::earlyret_value_offset());
 	   const Address val_addr1(ecx, JvmtiThreadState::earlyret_value_offset()
 	   + in_ByteSize(wordSize));
 	   */
 	const Address tos_addr (T8, in_bytes(JvmtiThreadState::earlyret_tos_offset()));
 	const Address oop_addr (T8, in_bytes(JvmtiThreadState::earlyret_oop_offset()));
 	const Address val_addr (T8, in_bytes(JvmtiThreadState::earlyret_value_offset()));
 	//V0, oop_addr,V1,val_addr
 	switch (state) {
 		case atos:
 			//movl(eax, oop_addr);
 			ld_ptr(V0, oop_addr);
 			// movl(oop_addr, NULL_WORD);
 			st_ptr(R0, oop_addr);
 			//verify_oop(eax, state);       break;
 			verify_oop(V0, state);
 			break;
 		case ltos:
 			// movl(edx, val_addr1);               // fall through
 			ld_ptr(V0, val_addr);               // fall through
 			break;
 		case btos:                                     // fall through
 		case ctos:                                     // fall through
 		case stos:                                     // fall through
 		case itos:
 			//	movl(eax, val_addr);
 			lw(V0, val_addr);
 			break;
 			//FIXME ,I hava no idear fld store to where @jerome
 		case ftos:
 			//fld_s(val_addr);
 			lwc1(F0,T8, in_bytes(JvmtiThreadState::earlyret_value_offset()));
 			break;
 		case dtos:
 			//fld_d(val_addr);
 			ldc1(F0,T8, in_bytes(JvmtiThreadState::earlyret_value_offset()));
 			break;
 		case vtos: /* nothing to do */                    break;
 		default  : ShouldNotReachHere();
 	}
 	// Clean up tos value in the thread object
 	// movl(tos_addr,  (int) ilgl);
 	//addi(AT,R0,(int)ilgl);
 	move(AT, (int)ilgl);
 	sw(AT, tos_addr);
 	// movl(val_addr,  NULL_WORD);
 	sw(R0,T8, in_bytes(JvmtiThreadState::earlyret_value_offset()));
 }
 void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) {
   if (JvmtiExport::can_force_early_return()) {
     Label L;
 		Register tmp = T9;
     //movptr(c_rarg0, Address(r15_thread, JavaThread::jvmti_thread_state_offset()));
 		ld_ptr(AT,java_thread, in_bytes(JavaThread::jvmti_thread_state_offset()));
     //testptr(c_rarg0, c_rarg0);
     //jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit;
 		beq(AT,R0,L);
 		delayed()->nop();
     // Initiate earlyret handling only if it is not already being processed.
     // If the flag has the earlyret_processing bit set, it means that this code
     // is called *during* earlyret handling - we don't want to reenter.
     //movl(c_rarg0, Address(c_rarg0, JvmtiThreadState::earlyret_state_offset()));
 		lw(AT, AT, in_bytes(JvmtiThreadState::earlyret_state_offset()));
     //cmpl(c_rarg0, JvmtiThreadState::earlyret_pending);
     //jcc(Assembler::notEqual, L);
 		move(tmp, JvmtiThreadState::earlyret_pending);
 		bne(tmp, AT, L);
 		delayed()->nop();
 		get_thread(java_thread);
     // Call Interpreter::remove_activation_early_entry() to get the address of the
     // same-named entrypoint in the generated interpreter code.
     //movptr(c_rarg0, Address(r15_thread, JavaThread::jvmti_thread_state_offset()));
 		ld_ptr(tmp,java_thread, in_bytes(JavaThread::jvmti_thread_state_offset()));
     //movl(c_rarg0, Address(c_rarg0, JvmtiThreadState::earlyret_tos_offset()));
 		lw(AT,tmp, in_bytes(JvmtiThreadState::earlyret_tos_offset()));
 		move(A0, AT);
 		//push(AT);
 		call(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry),
 				relocInfo::runtime_call_type);
     //call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), c_rarg0);
     //jmp(rax);
     //bind(L);
 		jr(V0);
 		delayed()->nop();
 		bind(L);
 		get_thread(java_thread);
   }
 }
 void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(
                                                                  Register reg,
                                                                  int bcp_offset) {
   assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
   get_2_byte_integer_at_bcp(reg, AT, bcp_offset);
   hswap(reg);
 }
 void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache,
                                                            Register index,
                                                            int bcp_offset,
                                                            size_t index_size) {
   assert_different_registers(cache, index);
   get_cache_index_at_bcp(index, bcp_offset, index_size);
   ld(cache, FP, frame::interpreter_frame_cache_offset * wordSize);
   assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
   assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line");
   shl(index, 2);
 }
 void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache,
                                                                          Register index,
                                                                          Register bytecode,
                                                                          int byte_no,
                                                                          int bcp_offset,
                                                                         size_t index_size) {
    get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size);
    // We use a 32-bit load here since the layout of 64-bit words on
    // little-endian machines allow us that.
    dsll(AT, index, Address::times_ptr);
    dadd(AT, cache, AT);
    lw(bytecode, AT, in_bytes(ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset()));
    const int shift_count = (1 + byte_no) * BitsPerByte;
    assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) ||
           (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift),
           "correct shift count");
    dsrl(bytecode, bytecode, shift_count);
    assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask");
    move(AT, ConstantPoolCacheEntry::bytecode_1_mask);
    andr(bytecode, bytecode, AT);
  }
 void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache,
 								Register tmp,
 								int bcp_offset, size_t index_size) {
 	assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
 	assert(cache != tmp, "must use different register");
 	get_cache_index_at_bcp(tmp, bcp_offset, index_size);
 	assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
 	// convert from field index to ConstantPoolCacheEntry index
 	// and from word offset to byte offset
 	dsll(tmp, tmp, 2+LogBytesPerWord);
 	ld(cache, FP, frame::interpreter_frame_cache_offset * wordSize);
 	// skip past the header
 	daddi(cache, cache, in_bytes(ConstantPoolCache::base_offset()));
 	dadd(cache, cache, AT);
 }
 void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index,
                                                        int bcp_offset,
                                                        size_t index_size) {
   assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
   if (index_size == sizeof(u2)) {
     get_2_byte_integer_at_bcp(index, AT, bcp_offset);
   } else if (index_size == sizeof(u4)) {
     assert(EnableInvokeDynamic, "giant index used only for JSR 292");
     get_4_byte_integer_at_bcp(index, AT, bcp_offset);
     // Check if the secondary index definition is still ~x, otherwise
     // we have to change the following assembler code to calculate the
     // plain index.
     assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line");
     nor(index, index, R0);
     sll(index, index, 0);
   } else if (index_size == sizeof(u1)) {
     lbu(index, BCP, bcp_offset);
   } else {
     ShouldNotReachHere();
   }
 }
 void InterpreterMacroAssembler::get_method_counters(Register method,
                                                     Register mcs, Label& skip) {
   Label has_counters;
   ld(mcs, method, in_bytes(Method::method_counters_offset()));
   bne(mcs, R0, has_counters);
   nop();
   call_VM(noreg, CAST_FROM_FN_PTR(address,
           InterpreterRuntime::build_method_counters), method);
   ld(mcs, method, in_bytes(Method::method_counters_offset()));
   beq(mcs, R0, skip);   // No MethodCounters allocated, OutOfMemory
   nop();
   bind(has_counters);
 }
  // Load object from cpool->resolved_references(index)
  void InterpreterMacroAssembler::load_resolved_reference_at_index(
                                             Register result, Register index) {
    assert_different_registers(result, index);
    // convert from field index to resolved_references() index and from
    // word index to byte offset. Since this is a java object, it can be compressed
    Register tmp = index;  // reuse
    shl(tmp, LogBytesPerHeapOop);
    get_constant_pool(result);
    // load pointer for resolved_references[] objArray
    ld(result, result, ConstantPool::resolved_references_offset_in_bytes());
    // JNIHandles::resolve(obj);
    // movptr(result, Address(result, 0));
    ld(result, result, 0); //? is needed?
    // Add in the index
    dadd(result, result, tmp);
    load_heap_oop(result, Address(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT)));
  }
 // Resets LVP to locals.  Register sub_klass cannot be any of the above.
 void InterpreterMacroAssembler::gen_subtype_check( Register Rsup_klass, Register Rsub_klass, Label &ok_is_subtype ) {
   assert( Rsub_klass != Rsup_klass, "Rsup_klass holds superklass" );
   assert( Rsub_klass != T1, "T1 holds 2ndary super array length" );
   assert( Rsub_klass != T0, "T0 holds 2ndary super array scan ptr" );
  // Profile the not-null value's klass.
  // [20130904] Fu: Here T9 and T1 are used as temporary registers.
   profile_typecheck(T9, Rsub_klass, T1); // blows rcx, reloads rdi
 // Do the check.
   check_klass_subtype(Rsub_klass, Rsup_klass, T1, ok_is_subtype); // blows rcx
 // Profile the failure of the check.
   profile_typecheck_failed(T9); // blows rcx
 }
 // Java Expression Stack
 void InterpreterMacroAssembler::pop_ptr(Register r) {
   pop(r);
   //if (TaggedStackInterpreter) addptr(rsp, 1 * wordSize);
 //	if (TaggedStackInterpreter) addi(SP,SP, 1 * wordSize);
 }
 /*
 void InterpreterMacroAssembler::pop_ptr(Register r, Register tag) {
   pop(r);
  // if (TaggedStackInterpreter) pop(tag);
 }*/
 void InterpreterMacroAssembler::pop_i(Register r) {
   // XXX can't use pop currently, upper half non clean
   //movl(r, Address(rsp, 0));
   //addptr(rsp, wordSize);
   lw(r, SP, 0);
   daddi(SP, SP, 8);
 	//if (TaggedStackInterpreter) addptr(rsp, 1 * wordSize);
 //	if (TaggedStackInterpreter) addi(SP,SP, 1 * wordSize);
 }
 /*
 void InterpreterMacroAssembler::pop_l(Register r) {
   //movq(r, Address(rsp, 0));
   //addptr(rsp, 2 * Interpreter::stackElementSize());
 	//FIXME, this directly call assembler. by aoqi
 	ld(r, SP, 0);
 	addi(SP, SP, 8);
 	if (TaggedStackInterpreter) addi(SP,SP, 2 * wordSize);
 }
 */
 //FIXME How many registers do push_l & pop_l use? aoqi
 void InterpreterMacroAssembler::pop_l(Register lo, Register hi) {
   pop(lo);
   //if (TaggedStackInterpreter) daddi(SP,SP, 1 * wordSize);
   pop(hi);
   //if (TaggedStackInterpreter) daddi(SP,SP, 1 * wordSize);
 }
 void InterpreterMacroAssembler::pop_f() {
   lwc1(FSF, SP, 0);
   daddi(SP, SP, 1 * wordSize);
 //  if (TaggedStackInterpreter) addi(SP,SP, 1 * wordSize);
 }
 void InterpreterMacroAssembler::pop_d() {
   pop_dtos_to_esp();
   ldc1(FSF, SP, 0);
   daddi(SP, SP, 2 * wordSize);
 }
 // Pop the top of the java expression stack to execution stack (which
 // happens to be the same place).
 //FIXME ,I hava no idea which register to use
 void InterpreterMacroAssembler::pop_dtos_to_esp() {
 /*	if (TaggedStackInterpreter) {
 		// Pop double value into scratch registers
 		//  popl(eax);
 		pop(V0);
 		//addl(esp, 1* wordSize);
 		addi(SP,SP, 1* wordSize);
 		//popl(edx);
 		pop(V1);
 		//addl(esp, 1* wordSize);
 		addi(SP,SP, 1* wordSize);
 		// pushl(edx);
 		push(V1);
 		//pushl(eax);
 		push(V0);
 	}*/
 }
 void InterpreterMacroAssembler::pop_ftos_to_esp() {
 /*  if (TaggedStackInterpreter) {
 		//  popl(eax);
 		pop(V0);
 		//addl(esp, 1 * wordSize);
 		addi(SP,SP, 1 * wordSize);
 		// pushl(eax);  // ftos is at esp
 		push(V0);  // ftos is at esp
 	}*/
 }
 void InterpreterMacroAssembler::push_ptr(Register r) {
   //if (TaggedStackInterpreter) push(frame::TagReference);
 /*	if (TaggedStackInterpreter) {
 		move(AT, frame::TagReference);
 		push(AT);
 	}//pushl(r);*/
   push(r);
 }
 /*
 void InterpreterMacroAssembler::push_ptr(Register r, Register tag) {
   //if (TaggedStackInterpreter) push(tag);
 	if (TaggedStackInterpreter){
 		move(AT, tag);
 		push(AT);  // tag first
 	}
   push(r);
 }*/
 void InterpreterMacroAssembler::push_i(Register r) {
   //if (TaggedStackInterpreter) push(frame::TagValue);
 /*	if (TaggedStackInterpreter) {
 		move(AT, frame::TagValue);
 		push(AT);
 	}*/
   push(r);
 }
 /*
 void InterpreterMacroAssembler::push_l(Register r) {
   if (TaggedStackInterpreter) {
     //push(frame::TagValue);
     //subptr(rsp, 1 * wordSize);
     //push(frame::TagValue);
     //subptr(rsp, 1 * wordSize);
 		move(AT, frame::TagValue);
 		push(AT);
   } else {
     addi(SP, SP, (-2) * wordSize);
   }
   //movq(Address(rsp, 0), r);
 	//FIXME, same as pop_l
 	sd(r, SP, 0);
 }
 */
 //FIXME How many registers do push_l & pop_l use? aoqi
 void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
   //if (TaggedStackInterpreter) pushl(frame::TagValue);
   /*if (TaggedStackInterpreter) {
     move(AT, frame::TagValue);
 		push(AT);
 	}*/
 	//pushl(hi);
 	push(hi);
 	//if (TaggedStackInterpreter) pushl(frame::TagValue);
 /*	if (TaggedStackInterpreter) {
 		move(AT, frame::TagValue);
 		push(AT);
 	}*/
 	//pushl(lo);
 	push(lo);
 }
 //void InterpreterMacroAssembler::push_f(XMMRegister r) {
 void InterpreterMacroAssembler::push_f() {
  /* if (TaggedStackInterpreter) {
     move(AT, frame::TagValue);
     push(AT);
   }// Do not schedule for no AGI! Never write beyond esp!*/
   daddi(SP, SP, (-1) * wordSize);
   swc1(FSF, SP, 0 * wordSize);
   sw(R0, SP,  4);
 }
 //FIXME. aoqi
 void InterpreterMacroAssembler::push_d(FloatRegister r) {
  /* if (TaggedStackInterpreter) {
     move(AT, frame::TagValue);
     push(AT);
     addi(SP, SP, (-3) * wordSize);
     swc1(FSF, SP, 0 * wordSize);
     swc1(SSF, SP, 1 * wordSize);
     lwc1(r, SP, 1*wordSize);
     swc1(r, SP, 2*wordSize);
     move(AT, frame::TagValue);
     sw(AT, SP, 1*wordSize);
   } else {*/
     daddi(SP, SP, (-2) * wordSize);
     sdc1(FSF, SP, 0 * wordSize);
     sdc1(SSF, SP, 1 * wordSize);
  // }
 }
 void InterpreterMacroAssembler::pop(TosState state) {
   switch (state) {
     case atos: pop(FSR);      break;
     case btos:
     case ctos:
     case stos:
     case itos:
 	       pop_i(FSR);
 	       break;
     case ltos:
 	       pop_l(FSR, SSR);
 	       break;
     case ftos: pop_f();      						break;
     case dtos: pop_d();      						break;
     case vtos: /* nothing to do */      break;
     default:   ShouldNotReachHere();
   }
   verify_oop(V0, state);
 }
 //FSR=V0,SSR=V1
 void InterpreterMacroAssembler::push(TosState state) {
   verify_oop(V0, state);
   switch (state) {
     case atos:   push(FSR);    break;
     case btos:						     // fall through
     case ctos:						     // fall through
     case stos:						     // fall through
     case itos:
 		 push_i(FSR);
 		 break;
     case ltos:
     //FIXME aoqi.
 		 daddi(SP, SP, (-2) * wordSize);
 		 //sd(SSR, SP, 1 * wordSize);
 		 sd(R0, SP, 1 * wordSize);
 		 sd(FSR, SP, 0 * wordSize);
 		 break;
     case ftos:
 		 push_f();
 		 break;
     case dtos:
 		 //FIXME, I have no idea which register to use
 		 push_d(FSF);
 		 break;
     case vtos: /* nothing to do */                            break;
     default  : ShouldNotReachHere();
   }
 }
 // Tagged stack helpers for swap and dup
 void InterpreterMacroAssembler::load_ptr(int n, Register val) {
   ld(val, SP, Interpreter::expr_offset_in_bytes(n));
   /*if (TaggedStackInterpreter) {
     ld(tag, SP, Interpreter::expr_tag_offset_in_bytes(n));
   }*/
 }
 void InterpreterMacroAssembler::store_ptr(int n, Register val) {
   sd(val, SP, Interpreter::expr_offset_in_bytes(n));
  /* if (TaggedStackInterpreter) {
     //movptr(Address(rsp, Interpreter::expr_tag_offset_in_bytes(n)), tag);
     sd(tag, SP, Interpreter::expr_tag_offset_in_bytes(n));
   }*/
 }
 /*
 // Tagged local support
 //LVP=S7, local variable pointer register , FIXME
 void InterpreterMacroAssembler::tag_local(frame::Tag tag, int n) {
   if (TaggedStackInterpreter) {
     if (tag == frame::TagCategory2) {
       //movptr(Address(r14, Interpreter::local_tag_offset_in_bytes(n+1)),
       //     (int32_t)frame::TagValue);
 			move(AT, (int)frame::TagValue);
 			sw(AT,LVP, Interpreter::local_tag_offset_in_bytes(n+1));
       //movptr(Address(r14, Interpreter::local_tag_offset_in_bytes(n)),
       //     (int32_t)frame::TagValue);
 			sw(AT,LVP, Interpreter::local_tag_offset_in_bytes(n));
     } else {
       //movptr(Address(r14, Interpreter::local_tag_offset_in_bytes(n)), (int32_t)tag);
 			move(AT, (int)tag);
 			sw(AT,LVP, Interpreter::local_tag_offset_in_bytes(n));
     }
   }
 }
 void InterpreterMacroAssembler::tag_local(frame::Tag tag, Register idx) {
   if (TaggedStackInterpreter) {
     if (tag == frame::TagCategory2) {
       //movptr(Address(r14, idx, Address::times_8,
       //            Interpreter::local_tag_offset_in_bytes(1)), (int32_t)frame::TagValue);
       //movptr(Address(r14, idx, Address::times_8,
       //            Interpreter::local_tag_offset_in_bytes(0)), (int32_t)frame::TagValue);
 			shl(idx, 3);
 			add(idx,LVP,idx);
 			move(AT,(int)frame::TagValue);
 			sw(AT, idx, Interpreter::local_tag_offset_in_bytes(1));
 			shl(idx, 3);
 			add(idx,LVP,idx);
 			move(AT,(int)frame::TagValue);
 			sw(AT, idx, Interpreter::local_tag_offset_in_bytes(0));
     } else {
       //movptr(Address(r14, idx, Address::times_8, Interpreter::local_tag_offset_in_bytes(0)),
       //     (int32_t)tag);
 			shl(idx, 3);
 			add(idx,LVP,idx);
 			move(AT,(int)tag);
 			sw(AT, idx, Interpreter::local_tag_offset_in_bytes(0));
     }
   }
 }
 void InterpreterMacroAssembler::tag_local(Register tag, Register idx) {
   if (TaggedStackInterpreter) {
     // can only be TagValue or TagReference
     //movptr(Address(r14, idx, Address::times_8, Interpreter::local_tag_offset_in_bytes(0)), tag);
 		shl(idx, 3);
 		add(idx,LVP,idx);
 		sw(tag, idx, Interpreter::local_tag_offset_in_bytes(0));
   }
 }
 void InterpreterMacroAssembler::tag_local(Register tag, int n) {
   if (TaggedStackInterpreter) {
     // can only be TagValue or TagReference
     //movptr(Address(r14, Interpreter::local_tag_offset_in_bytes(n)), tag);
 		sw(tag, LVP, Interpreter::local_tag_offset_in_bytes(n));
   }
 }
 #ifdef ASSERT
 void InterpreterMacroAssembler::verify_local_tag(frame::Tag tag, int n) {
   if (TaggedStackInterpreter) {
      frame::Tag t = tag;
     if (tag == frame::TagCategory2) {
       Label nbl;
       t = frame::TagValue;  // change to what is stored in locals
       //cmpptr(Address(r14, Interpreter::local_tag_offset_in_bytes(n+1)), (int32_t)t);
       //jcc(Assembler::equal, nbl);
 			lw(AT, LVP, Interpreter::local_tag_offset_in_bytes(n+1));
 			addi(AT,AT, -(int)t);
 			beq(AT, R0, nbl);
 			delayed()->nop();
       stop("Local tag is bad for long/double");
       bind(nbl);
     }
     Label notBad;
     //cmpq(Address(r14, Interpreter::local_tag_offset_in_bytes(n)), (int32_t)t);
     //jcc(Assembler::equal, notBad);
 		lw(AT, LVP, Interpreter::local_tag_offset_in_bytes(n));
 		addi(AT,AT, -(int)t);
 		beq(AT, R0, notBad);
 		delayed()->nop();
 		// Also compare if the local value is zero, then the tag might
     // not have been set coming from deopt.
     //cmpptr(Address(r14, Interpreter::local_offset_in_bytes(n)), 0);
     //jcc(Assembler::equal, notBad);
 		lw(AT, LVP, Interpreter::local_tag_offset_in_bytes(n+1));
 		beq(AT, R0, notBad);
 		delayed()->nop();
     stop("Local tag is bad");
     bind(notBad);
   }
 }
 void InterpreterMacroAssembler::verify_local_tag(frame::Tag tag, Register idx) {
   if (TaggedStackInterpreter) {
     frame::Tag t = tag;
     if (tag == frame::TagCategory2) {
       Label nbl;
       t = frame::TagValue;  // change to what is stored in locals
       //cmpptr(Address(r14, idx, Address::times_8, Interpreter::local_tag_offset_in_bytes(1)), (int32_t)t);
       //jcc(Assembler::equal, nbl);
 			shl(idx, 3);
 			add(idx,LVP,idx);
 			lw(AT, idx, Interpreter::local_tag_offset_in_bytes(1));
 			addi(AT,AT, -(int)t);
 			beq(AT,R0, nbl);
 			delayed()->nop();
       stop("Local tag is bad for long/double");
       bind(nbl);
     }
     Label notBad;
     //cmpptr(Address(r14, idx, Address::times_8, Interpreter::local_tag_offset_in_bytes(0)), (int32_t)t);
     //jcc(Assembler::equal, notBad);
 		shl(idx, 3);
 		add(idx,LVP,idx);
 		lw(AT, idx, Interpreter::local_tag_offset_in_bytes(0));
 		addi(AT,AT, -(int)t);
 		beq(AT,R0, notBad);
 		delayed()->nop();
     // Also compare if the local value is zero, then the tag might
     // not have been set coming from deopt.
     //cmpptr(Address(r14, idx, Address::times_8, Interpreter::local_offset_in_bytes(0)), 0);
     //jcc(Assembler::equal, notBad);
 		shl(idx, 3);
 		add(idx,LVP,idx);
 		lw(AT, idx, Interpreter::local_tag_offset_in_bytes(0));
 		beq(AT,R0, notBad);
 		delayed()->nop();
     stop("Local tag is bad");
     bind(notBad);
   }
 }
 #endif // ASSERT
 */
 /*
 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point) {
   MacroAssembler::call_VM_leaf_base(entry_point, 0);
 }
 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point,
                                                    Register arg_1) {
   if (arg_1 != A0) move(A0, arg_1);
   MacroAssembler::call_VM_leaf_base(entry_point, 1);
 }
 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point,
                                                    Register arg_1,
                                                    Register arg_2) {
   if (arg_1 != A0) move(A0, arg_1);
   if (arg_2 != A1) move(A1, arg_2); assert(arg_2 != A0, "smashed argument");
   MacroAssembler::call_VM_leaf_base(entry_point, 2);
 }
 void InterpreterMacroAssembler::super_call_VM_leaf(address entry_point,
                                                    Register arg_1,
                                                    Register arg_2,
                                                    Register arg_3) {
   if (arg_1 != A0) move(A0, arg_1);
   if (arg_2 != A1) move(A1, arg_2); assert(arg_2 != A0, "smashed argument");
   if (arg_3 != A2) move(A2, arg_3); assert(arg_3 != A0 && arg_3 != A1, "smashed argument");
   MacroAssembler::call_VM_leaf_base(entry_point, 3);
 }
 */
 // Jump to from_interpreted entry of a call unless single stepping is possible
 // in this thread in which case we must call the i2i entry
 void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
   // record last_sp
   move(Rsender, SP);
   sd(SP, FP, frame::interpreter_frame_last_sp_offset * wordSize);
   if (JvmtiExport::can_post_interpreter_events()) {
     Label run_compiled_code;
     // JVMTI events, such as single-stepping, are implemented partly by avoiding running
     // compiled code in threads for which the event is enabled.  Check here for
     // interp_only_mode if these events CAN be enabled.
 #ifndef OPT_THREAD
 	get_thread(temp);
 #else
 	move(temp, TREG);
 #endif
     // interp_only is an int, on little endian it is sufficient to test the byte only
     // Is a cmpl faster (ce
     //cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
     //jcc(Assembler::zero, run_compiled_code);
     lw(AT, temp, in_bytes(JavaThread::interp_only_mode_offset()));
     beq(AT, R0, run_compiled_code);
     delayed()->nop();
     //jmp(Address(method, methodOopDesc::interpreter_entry_offset()));
     ld(AT, method, in_bytes(Method::interpreter_entry_offset()));
     jr(AT);
     delayed()->nop();
     bind(run_compiled_code);
   }
   ld(AT, method, in_bytes(Method::from_interpreted_offset()));
   jr(AT);
   delayed()->nop();
 }
 // The following two routines provide a hook so that an implementation
 // can schedule the dispatch in two parts.  amd64 does not do this.
 void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
   // Nothing amd64 specific to be done here
 }
 void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
   dispatch_next(state, step);
 }
 // assume the next bytecode in T8.
 void InterpreterMacroAssembler::dispatch_base(TosState state,
                                               address* table,
                                               bool verifyoop) {
   if (VerifyActivationFrameSize) {
     Label L;
     dsub(T2, FP, SP);
     int min_frame_size = (frame::link_offset -
 	frame::interpreter_frame_initial_sp_offset) * wordSize;
     daddi(T2, T2,- min_frame_size);
     bgez(T2, L);
     delayed()->nop();
     stop("broken stack frame");
     bind(L);
   }
   // FIXME: I do not know which register should pass to verify_oop
   if (verifyoop) verify_oop(FSR, state);
   dsll(T2, Rnext, LogBytesPerWord);
   if((long)table >= (long)Interpreter::dispatch_table(btos) &&
      (long)table <= (long)Interpreter::dispatch_table(vtos)
     ) {
      int table_size = (long)Interpreter::dispatch_table(ctos) - (long)Interpreter::dispatch_table(btos);
      int table_offset = ((int)state - (int)itos) * table_size;
      // 2013/12/17 Fu: GP points to the starting address of Interpreter::dispatch_table(itos).
      // See StubGenerator::generate_call_stub(address& return_address) for the initialization of GP.
      if(table_offset != 0) {
         daddiu(T3, GP, table_offset);
         gsldx(T3, T2, T3, 0); // 2013/5/7 Jin: Godson3 extension instruction
      } else {
         gsldx(T3, T2, GP, 0);
      }
   } else {
      li(T3, (long)table);
      gsldx(T3, T2, T3, 0);
   }
   jr(T3);
   delayed()->nop();
 }
 void InterpreterMacroAssembler::dispatch_only(TosState state) {
   dispatch_base(state, Interpreter::dispatch_table(state));
 }
 void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
   dispatch_base(state, Interpreter::normal_table(state));
 }
 void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
   dispatch_base(state, Interpreter::normal_table(state), false);
 }
 void InterpreterMacroAssembler::dispatch_next(TosState state, int step) {
   // load next bytecode (load before advancing r13 to prevent AGI)
   lbu(Rnext, BCP, step);
   increment(BCP, step);
   dispatch_base(state, Interpreter::dispatch_table(state));
 }
 void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
   // load current bytecode
   lbu(Rnext, BCP, 0);
   dispatch_base(state, table);
 }
 // remove activation
 //
 // Unlock the receiver if this is a synchronized method.
 // Unlock any Java monitors from syncronized blocks.
 // Remove the activation from the stack.
 //
 // If there are locked Java monitors
 //    If throw_monitor_exception
 //       throws IllegalMonitorStateException
 //    Else if install_monitor_exception
 //       installs IllegalMonitorStateException
 //    Else
 //       no error processing
 // used registers : T1, T2, T3, T8
 // T1 : thread, method access flags
 // T2 : monitor entry pointer
 // T3 : method, monitor top
 // T8 : unlock flag
 void InterpreterMacroAssembler::remove_activation(
         TosState state,
         Register ret_addr,
         bool throw_monitor_exception,
         bool install_monitor_exception,
 	bool notify_jvmdi) {
   // Note: Registers V0, V1 and F0, F1 may be in use for the result
   // check if synchronized method
   Label unlocked, unlock, no_unlock;
   // get the value of _do_not_unlock_if_synchronized into T8
 #ifndef OPT_THREAD
   Register thread = T1;
   get_thread(thread);
 #else
   Register thread = TREG;
 #endif
   lb(T8, thread, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
   // reset the flag
   sb(R0, thread, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
   // get method access flags
   ld(T3, FP, frame::interpreter_frame_method_offset * wordSize);
   lw(T1, T3, in_bytes(Method::access_flags_offset()));
   andi(T1, T1, JVM_ACC_SYNCHRONIZED);
   beq(T1, R0, unlocked);
   delayed()->nop();
   // Don't unlock anything if the _do_not_unlock_if_synchronized flag is set.
   bne(T8, R0, no_unlock);
   delayed()->nop();
   // unlock monitor
   push(state);     // save result
   // 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.
   daddiu(c_rarg0, FP, frame::interpreter_frame_initial_sp_offset * wordSize
       - (int)sizeof(BasicObjectLock));
   // address of first monitor
   lw(T1, c_rarg0, BasicObjectLock::obj_offset_in_bytes());
   bne(T1, R0, unlock);
   delayed()->nop();
   pop(state);
   if (throw_monitor_exception) {
     // Entry already unlocked, need to throw exception
     //I think mips do not need empty_FPU_stack
     // remove possible return value from FPU-stack, otherwise stack could overflow
     empty_FPU_stack();
     call_VM(NOREG, CAST_FROM_FN_PTR(address,
 	  InterpreterRuntime::throw_illegal_monitor_state_exception));
     should_not_reach_here();
   } else {
     // Monitor already unlocked during a stack unroll.
     // If requested, install an illegal_monitor_state_exception.
     // Continue with stack unrolling.
     if (install_monitor_exception) {
       // remove possible return value from FPU-stack,
       // otherwise stack could overflow
       empty_FPU_stack();
       call_VM(NOREG, CAST_FROM_FN_PTR(address,
 	    InterpreterRuntime::new_illegal_monitor_state_exception));
     }
     b(unlocked);
     delayed()->nop();
   }
   bind(unlock);
   unlock_object(c_rarg0);
   pop(state);
   // Check that for block-structured locking (i.e., that all locked objects has been unlocked)
   bind(unlocked);
   // V0, V1: Might contain return value
   // Check that all monitors are unlocked
   {
     Label loop, exception, entry, restart;
     const int entry_size  = frame::interpreter_frame_monitor_size() * wordSize;
     const Address monitor_block_top(FP,
 	frame::interpreter_frame_monitor_block_top_offset * wordSize);
     bind(restart);
     // points to current entry, starting with top-most entry (ecx)
     ld(c_rarg0, monitor_block_top);
     // points to word before bottom of monitor block (ebx)
     daddiu(T3, FP, frame::interpreter_frame_initial_sp_offset * wordSize);
     //  lw(AT, R0, 12);
     b(entry);
     delayed()->nop();
     // Entry already locked, need to throw exception
     bind(exception);
     if (throw_monitor_exception) {
       // Throw exception
       // remove possible return value from FPU-stack,
       // otherwise stack could overflow
       empty_FPU_stack();
       MacroAssembler::call_VM(NOREG, CAST_FROM_FN_PTR(address,
 	    InterpreterRuntime::throw_illegal_monitor_state_exception));
       should_not_reach_here();
     } else {
       // Stack unrolling. Unlock object and install illegal_monitor_exception
       // Unlock does not block, so don't have to worry about the frame
       // We don't have to preserve eax, edx since we are going to
       // throw an exception
       unlock_object(c_rarg0);
       if (install_monitor_exception) {
 	empty_FPU_stack();
 	call_VM(NOREG, CAST_FROM_FN_PTR(address,
 	      InterpreterRuntime::new_illegal_monitor_state_exception));
       }
       b(restart);
       delayed()->nop();
     }
     bind(loop);
     //    stop("before object excetpion");
     ld(T1, c_rarg0, BasicObjectLock::obj_offset_in_bytes());
     bne(T1, R0, exception);// check if current entry is used
     delayed()->nop();
     daddiu(c_rarg0, c_rarg0, entry_size);// otherwise advance to next entry
     bind(entry);
     bne(c_rarg0, T3, loop);	// check if bottom reached
     delayed()->nop();	// if not at bottom then check this entry
   }
   bind(no_unlock);
   // jvmpi support (jvmdi does not generate MethodExit on exception / popFrame)
   if (notify_jvmdi) {
     //notify_method_exit(state);              // preserve TOSCA
     notify_method_exit(false,state,NotifyJVMTI);    // preserve TOSCA
   } else {
     // notify_jvmpi_method_exit(state);       // preserve TOSCA
     notify_method_exit(false,state,SkipNotifyJVMTI);// preserve TOSCA
   }
   // remove activation
   ld(SP, FP, frame::interpreter_frame_sender_sp_offset * wordSize);
   ld(ret_addr, FP, frame::interpreter_frame_return_addr_offset * wordSize);
   ld(FP, FP, frame::interpreter_frame_sender_fp_offset * wordSize);
 }
 #endif // C_INTERP
 // Lock object
 //
 // Args:
 //      c_rarg1: BasicObjectLock to be used for locking
 //
 // Kills:
 //      rax
 //      c_rarg0, c_rarg1, c_rarg2, c_rarg3, .. (param regs)
 //      rscratch1, rscratch2 (scratch regs)
 void InterpreterMacroAssembler::lock_object(Register lock_reg) {
   assert(lock_reg == c_rarg0, "The argument is only for looks. It must be c_rarg0");
   if (UseHeavyMonitors) {
     call_VM(NOREG, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
 	lock_reg);
   } else {
     Label done;
     const Register swap_reg = T2;  // Must use eax for cmpxchg instruction
     const Register obj_reg  = T1;  // Will contain the oop
     const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
     const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
     const int mark_offset = lock_offset
       + BasicLock::displaced_header_offset_in_bytes();
     Label slow_case;
     // Load object pointer into obj_reg %ecx
     ld(obj_reg, lock_reg, obj_offset);
     if (UseBiasedLocking) {
       // Note: we use noreg for the temporary register since it's hard
       // to come up with a free register on all incoming code paths
       biased_locking_enter(lock_reg, obj_reg, swap_reg, noreg, false,
 	  done, &slow_case);
     }
     // Load (object->mark() | 1) into swap_reg %eax
     ld(AT, obj_reg, 0);
     ori(swap_reg, AT, 1);
     // Save (object->mark() | 1) into BasicLock's displaced header
     sd(swap_reg, lock_reg, mark_offset);
     assert(lock_offset == 0, "displached header must be first word in BasicObjectLock");
     //if (os::is_MP()) {
       //  lock();
     //}
     cmpxchg(lock_reg, Address(obj_reg, 0), swap_reg);
     if (PrintBiasedLockingStatistics) {
       Label L;
       beq(AT, R0, L);
       delayed()->nop();
       push(T0);
       push(T1);
       atomic_inc32((address)BiasedLocking::fast_path_entry_count_addr(), 1, T0, T1);
       pop(T1);
       pop(T0);
       bind(L);
     }
     bne(AT, R0, done);
     delayed()->nop();
     // Test if the oopMark is an obvious stack pointer, i.e.,
     //  1) (mark & 3) == 0, and
     //  2) SP <= mark < SP + os::pagesize()
     //
     // These 3 tests can be done by evaluating the following
     // expression: ((mark - esp) & (3 - os::vm_page_size())),
     // assuming both stack pointer and pagesize have their
     // least significant 2 bits clear.
     // NOTE: the oopMark is in swap_reg %eax as the result of cmpxchg
     dsub(swap_reg, swap_reg, SP);
     move(AT, 3 - os::vm_page_size());
     andr(swap_reg, swap_reg, AT);
     // Save the test result, for recursive case, the result is zero
     sd(swap_reg, lock_reg, mark_offset);
     if (PrintBiasedLockingStatistics) {
       Label L;
       bne(swap_reg, R0, L);
       delayed()->nop();
       push(T0);
       push(T1);
       atomic_inc32((address)BiasedLocking::fast_path_entry_count_addr(), 1, T0, T1);
       pop(T1);
       pop(T0);
       bind(L);
     }
     beq(swap_reg, R0, done);
     delayed()->nop();
     bind(slow_case);
     // Call the runtime routine for slow case
     call_VM(NOREG, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), lock_reg);
     bind(done);
   }
 }
 // Unlocks an object. Used in monitorexit bytecode and
 // remove_activation.  Throws an IllegalMonitorException if object is
 // not locked by current thread.
 //
 // Args:
 //      c_rarg1: BasicObjectLock for lock
 //
 // Kills:
 //      rax
 //      c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs)
 //      rscratch1, rscratch2 (scratch regs)
 // Argument: T6 : Points to BasicObjectLock structure for lock
 // Argument: c_rarg0 : Points to BasicObjectLock structure for lock
 // Throw an IllegalMonitorException if object is not locked by current thread
 void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
   assert(lock_reg == c_rarg0, "The argument is only for looks. It must be c_rarg0");
   if (UseHeavyMonitors) {
     call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), lock_reg);
   } else {
     Label done;
     const Register swap_reg   = T2;  // Must use eax for cmpxchg instruction
     const Register header_reg = T3;  // Will contain the old oopMark
     const Register obj_reg    = T1;  // Will contain the oop
     save_bcp(); // Save in case of exception
     // Convert from BasicObjectLock structure to object and BasicLock structure
     // Store the BasicLock address into %eax
     daddi(swap_reg, lock_reg, BasicObjectLock::lock_offset_in_bytes());
     // Load oop into obj_reg(%ecx)
     ld(obj_reg, lock_reg, BasicObjectLock::obj_offset_in_bytes ());
     //free entry
     sd(R0, lock_reg, BasicObjectLock::obj_offset_in_bytes());
     if (UseBiasedLocking) {
       biased_locking_exit(obj_reg, header_reg, done);
     }
     // Load the old header from BasicLock structure
     ld(header_reg, swap_reg, BasicLock::displaced_header_offset_in_bytes());
     /*
     // Free entry
     sw(R0, lock_reg, BasicObjectLock::obj_offset_in_bytes());
      */
     // zero for recursive case
     beq(header_reg, R0, done);
     delayed()->nop();
     // Atomic swap back the old header
     if (os::is_MP()); //lock();
     cmpxchg(header_reg, Address(obj_reg, 0), swap_reg);
     // zero for recursive case
     bne(AT, R0, done);
     delayed()->nop();
     // Call the runtime routine for slow case.
     sd(obj_reg, lock_reg, BasicObjectLock::obj_offset_in_bytes()); // restore obj
     call_VM(NOREG, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
 	lock_reg);
     bind(done);
     restore_bcp();
   }
 }
 #ifndef CC_INTERP
 void InterpreterMacroAssembler::test_method_data_pointer(Register mdp,
     Label& zero_continue) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   ld(mdp, Address(FP, frame::interpreter_frame_mdx_offset * wordSize));
   beq(mdp, R0, zero_continue);
   delayed()->nop();
 }
 // Set the method data pointer for the current bcp.
 void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
         assert(ProfileInterpreter, "must be profiling interpreter");
         Label set_mdp;
         // V0 and T0 will be used as two temporary registers.
         sd(V0, SP, (-1) * wordSize);
         sd(T0, SP, (-2) * wordSize);
         daddiu(SP, SP, (-2) * wordSize);
         get_method(T0);
         // Test MDO to avoid the call if it is NULL.
         ld(V0, T0, in_bytes(Method::method_data_offset()));
         beq(V0, R0, set_mdp);
         delayed()->nop();
         // method: T0
         // bcp: BCP --> S0
         call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), T0, BCP);
         // mdi: V0
         // mdo is guaranteed to be non-zero here, we checked for it before the call.
         /* Jin: reload T0 */
         get_method(T0);
         ld(T0, T0, in_bytes(Method::method_data_offset()));
         daddiu(T0, T0, in_bytes(MethodData::data_offset()));
         daddu(V0, T0, V0);
         bind(set_mdp);
         sd(V0, FP, frame::interpreter_frame_mdx_offset * wordSize);
         daddiu(SP, SP, 2 * wordSize);
         ld(V0, SP, (-1) * wordSize);
         ld(T0, SP, (-2) * wordSize);
 }
 void InterpreterMacroAssembler::verify_method_data_pointer() {
 assert(ProfileInterpreter, "must be profiling interpreter");
 #ifdef ASSERT
   Label verify_continue;
   Register method = V0;
   Register mdp = V1;
   Register tmp = A0;
   push(method);
   push(mdp);
   push(tmp);
   test_method_data_pointer(mdp, verify_continue); // If mdp is zero, continue
   get_method(method);
   // If the mdp is valid, it will point to a DataLayout header which is
   // consistent with the bcp.  The converse is highly probable also.
   lhu(tmp, mdp, in_bytes(DataLayout::bci_offset()));
   ld(AT, method, in_bytes(Method::const_offset()));
   daddu(tmp, tmp, AT);
   daddiu(tmp, tmp, in_bytes(ConstMethod::codes_offset()));
   beq(tmp, BCP, verify_continue);
   nop();
   call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp), method, BCP, mdp);
   bind(verify_continue);
   pop(tmp);
   pop(mdp);
   pop(method);
 #endif // ASSERT
 }
 void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in,
                                                 int constant,
                                                 Register value) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   Address data(mdp_in, constant);
   sd(value, data);
 }
 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
                                                       int constant,
                                                       bool decrement) {
   // Counter address
   Address data(mdp_in, constant);
   increment_mdp_data_at(data, decrement);
 }
 void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
                                                       bool decrement) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   // %%% this does 64bit counters at best it is wasting space
   // at worst it is a rare bug when counters overflow
   Register tmp = S0;
   push(tmp);
   if (decrement) {
     // Decrement the register.
     ld(AT, data);
     daddiu(tmp, AT, (int32_t) -DataLayout::counter_increment);
     // If the decrement causes the counter to overflow, stay negative
     Label L;
     slt(AT, tmp, R0);
     bne(AT, R0, L);
     nop();
     daddi(tmp, tmp, (int32_t) DataLayout::counter_increment);
     bind(L);
     sd(tmp, data);
   } else {
     assert(DataLayout::counter_increment == 1,
            "flow-free idiom only works with 1");
     ld(AT, data);
     // Increment the register.
     daddiu(tmp, AT, DataLayout::counter_increment);
     // If the increment causes the counter to overflow, pull back by 1.
     slt(AT, tmp, R0);
     dsubu(tmp, tmp, AT);
     sd(tmp, data);
   }
   pop(tmp);
 }
 void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
                                                       Register reg,
                                                       int constant,
                                                       bool decrement) {
   Register tmp = S0;
   push(S0);
   if (decrement) {
     // Decrement the register.
     daddu(AT, mdp_in, reg);
     assert(Assembler::is_simm16(constant), "constant is not a simm16 !");
     ld(AT, AT, constant);
     daddiu(tmp, AT, (int32_t) -DataLayout::counter_increment);
     // If the decrement causes the counter to overflow, stay negative
     Label L;
     slt(AT, tmp, R0);
     bne(AT, R0, L);
     nop();
     daddi(tmp, tmp, (int32_t) DataLayout::counter_increment);
     bind(L);
     daddu(AT, mdp_in, reg);
     sd(tmp, AT, constant);
   } else {
     daddu(AT, mdp_in, reg);
     assert(Assembler::is_simm16(constant), "constant is not a simm16 !");
     ld(AT, AT, constant);
     // Increment the register.
     daddiu(tmp, AT, DataLayout::counter_increment);
     // If the increment causes the counter to overflow, pull back by 1.
     slt(AT, tmp, R0);
     dsubu(tmp, tmp, AT);
     daddu(AT, mdp_in, reg);
     sd(tmp, AT, constant);
   }
   pop(S0);
 }
 void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in,
                                                 int flag_byte_constant) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   int header_offset = in_bytes(DataLayout::header_offset());
   int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant);
   // Set the flag
   lw(AT, Address(mdp_in, header_offset));
   if(Assembler::is_simm16(header_bits)) {
     ori(AT, AT, header_bits);
   } else {
     push(T8);
     // T8 is used as a temporary register.
     move(T8, header_bits);
     orr(AT, AT, T8);
     pop(T8);
   }
   sw(AT, Address(mdp_in, header_offset));
 }
 void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
                                                  int offset,
                                                  Register value,
                                                  Register test_value_out,
                                                  Label& not_equal_continue) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   if (test_value_out == noreg) {
     ld(AT, Address(mdp_in, offset));
     bne(AT, value, not_equal_continue);
     nop();
   } else {
     // Put the test value into a register, so caller can use it:
     ld(test_value_out, Address(mdp_in, offset));
     bne(value, test_value_out, not_equal_continue);
     nop();
   }
 }
 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
                                                      int offset_of_disp) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   assert(Assembler::is_simm16(offset_of_disp), "offset is not an simm16");
   ld(AT, mdp_in, offset_of_disp);
   daddu(mdp_in, mdp_in, AT);
   sd(mdp_in, Address(FP, frame::interpreter_frame_mdx_offset * wordSize));
 }
 void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
                                                      Register reg,
                                                      int offset_of_disp) {
   assert(ProfileInterpreter, "must be profiling interpreter");
 //  Attention: Until now (20121217), we do not support this kind of addressing on Loongson.
 //  Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
   daddu(AT, reg, mdp_in);
   assert(Assembler::is_simm16(offset_of_disp), "offset is not an simm16");
   ld(AT, AT, offset_of_disp);
   daddu(mdp_in, mdp_in, AT);
   sd(mdp_in, Address(FP, frame::interpreter_frame_mdx_offset * wordSize));
 }
 void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in,
                                                        int constant) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   if(Assembler::is_simm16(constant)) {
     daddiu(mdp_in, mdp_in, constant);
   } else {
     move(AT, constant);
     daddu(mdp_in, mdp_in, AT);
   }
   sd(mdp_in, Address(FP, frame::interpreter_frame_mdx_offset * wordSize));
 }
 void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
   assert(ProfileInterpreter, "must be profiling interpreter");
   push(return_bci); // save/restore across call_VM
   call_VM(noreg,
           CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret),
           return_bci);
   pop(return_bci);
 }
 void InterpreterMacroAssembler::profile_taken_branch(Register mdp,
                                                      Register bumped_count) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     // Otherwise, assign to mdp
     test_method_data_pointer(mdp, profile_continue);
     // We are taking a branch.  Increment the taken count.
     //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
     // We inline increment_mdp_data_at to return bumped_count in a register
     ld(bumped_count, mdp, in_bytes(JumpData::taken_offset()));
     assert(DataLayout::counter_increment == 1,
            "flow-free idiom only works with 1");
     push(T8);
     // T8 is used as a temporary register.
     daddiu(T8, bumped_count, DataLayout::counter_increment);
     slt(AT, T8, R0);
     dsubu(bumped_count, T8, AT);
     pop(T8);
     sd(bumped_count, mdp, in_bytes(JumpData::taken_offset())); // Store back out
     // The method data pointer needs to be updated to reflect the new target.
     update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
     bind(profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // We are taking a branch.  Increment the not taken count.
     increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
     // The method data pointer needs to be updated to correspond to
     // the next bytecode
     update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
     bind(profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_call(Register mdp) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // We are making a call.  Increment the count.
     increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
     // The method data pointer needs to be updated to reflect the new target.
     update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
     bind(profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_final_call(Register mdp) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // We are making a call.  Increment the count.
     increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
     // The method data pointer needs to be updated to reflect the new target.
     update_mdp_by_constant(mdp, in_bytes(VirtualCallData:: virtual_call_data_size()));
     bind(profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
                                                      Register mdp,
                                                      Register reg2,
                                                      bool receiver_can_be_null) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     Label skip_receiver_profile;
     if (receiver_can_be_null) {
        Label not_null;
        bne(receiver, R0, not_null);
        nop();
        // We are making a call.  Increment the count.
        increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
        beq(R0, R0, skip_receiver_profile);
        nop();
        bind(not_null);
     }
     // Record the receiver type.
     record_klass_in_profile(receiver, mdp, reg2, true);
     bind(skip_receiver_profile);
     // The method data pointer needs to be updated to reflect the new target.
     update_mdp_by_constant(mdp, in_bytes(VirtualCallData::virtual_call_data_size()));
     bind(profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_checkcast(bool is_null, Register mdp) {
 // In x86, this method does not exist.
 #ifndef CORE
         if (ProfileInterpreter) {
                 Label profile_continue;
                 // If no method data exists, go to profile_continue.
                 test_method_data_pointer(mdp, profile_continue);
                 if (is_null)                // Set the flag to true.
                         set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
                         //set_mdp_flag_at(mdp, BitData::null_flag_constant());
                 // The method data pointer needs to be updated.
                 update_mdp_by_constant(mdp, in_bytes(BitData::bit_data_size()));
                 bind (profile_continue);
         }
 #endif // !CORE
 }
 // This routine creates a state machine for updating the multi-row
 // type profile at a virtual call site (or other type-sensitive bytecode).
 // The machine visits each row (of receiver/count) until the receiver type
 // is found, or until it runs out of rows.  At the same time, it remembers
 // the location of the first empty row.  (An empty row records null for its
 // receiver, and can be allocated for a newly-observed receiver type.)
 // Because there are two degrees of freedom in the state, a simple linear
 // search will not work; it must be a decision tree.  Hence this helper
 // function is recursive, to generate the required tree structured code.
 // It's the interpreter, so we are trading off code space for speed.
 // See below for example code.
 void InterpreterMacroAssembler::record_klass_in_profile_helper(
                                         Register receiver, Register mdp,
                                         Register reg2,
                                         int start_row, Label& done, bool is_virtual_call) {
   if (TypeProfileWidth == 0) {
     if (is_virtual_call) {
       increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
     }
     return;
   }
   int last_row = VirtualCallData::row_limit() - 1;
   assert(start_row <= last_row, "must be work left to do");
   // Test this row for both the receiver and for null.
   // Take any of three different outcomes:
   //   1. found receiver => increment count and goto done
   //   2. found null => keep looking for case 1, maybe allocate this cell
   //   3. found something else => keep looking for cases 1 and 2
   // Case 3 is handled by a recursive call.
   for (int row = start_row; row <= last_row; row++) {
     Label next_test;
     bool test_for_null_also = (row == start_row);
     // See if the receiver is receiver[n].
     int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row));
     test_mdp_data_at(mdp, recvr_offset, receiver,
                      (test_for_null_also ? reg2 : noreg),
                      next_test);
     // (Reg2 now contains the receiver from the CallData.)
     // The receiver is receiver[n].  Increment count[n].
     int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row));
     increment_mdp_data_at(mdp, count_offset);
     beq(R0, R0, done);
     nop();
     bind(next_test);
     if (test_for_null_also) {
       Label found_null;
       // Failed the equality check on receiver[n]...  Test for null.
       if (start_row == last_row) {
         // The only thing left to do is handle the null case.
         if (is_virtual_call) {
           beq(reg2, R0, found_null);
           nop();
           // Receiver did not match any saved receiver and there is no empty row for it.
           // Increment total counter to indicate polymorphic case.
           increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
           beq(R0, R0, done);
           nop();
           bind(found_null);
         } else {
           bne(reg2, R0, done);
           nop();
         }
         break;
       }
       // Since null is rare, make it be the branch-taken case.
       beq(reg2, R0, found_null);
       nop();
       // Put all the "Case 3" tests here.
       record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done, is_virtual_call);
       // Found a null.  Keep searching for a matching receiver,
       // but remember that this is an empty (unused) slot.
       bind(found_null);
     }
   }
   // In the fall-through case, we found no matching receiver, but we
   // observed the receiver[start_row] is NULL.
   // Fill in the receiver field and increment the count.
   int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row));
   set_mdp_data_at(mdp, recvr_offset, receiver);
   int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row));
   move(reg2, DataLayout::counter_increment);
   set_mdp_data_at(mdp, count_offset, reg2);
   if (start_row > 0) {
     beq(R0, R0, done);
     nop();
   }
 }
 // Example state machine code for three profile rows:
 //   // main copy of decision tree, rooted at row[1]
 //   if (row[0].rec == rec) { row[0].incr(); goto done; }
 //   if (row[0].rec != NULL) {
 //     // inner copy of decision tree, rooted at row[1]
 //     if (row[1].rec == rec) { row[1].incr(); goto done; }
 //     if (row[1].rec != NULL) {
 //       // degenerate decision tree, rooted at row[2]
 //       if (row[2].rec == rec) { row[2].incr(); goto done; }
 //       if (row[2].rec != NULL) { goto done; } // overflow
 //       row[2].init(rec); goto done;
 //     } else {
 //       // remember row[1] is empty
 //       if (row[2].rec == rec) { row[2].incr(); goto done; }
 //       row[1].init(rec); goto done;
 //     }
 //   } else {
 //     // remember row[0] is empty
 //     if (row[1].rec == rec) { row[1].incr(); goto done; }
 //     if (row[2].rec == rec) { row[2].incr(); goto done; }
 //     row[0].init(rec); goto done;
 //   }
 void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
                                                         Register mdp,
                                                         Register reg2, bool is_virtual_call) {
   assert(ProfileInterpreter, "must be profiling");
   Label done;
   record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
   bind (done);
 }
 void InterpreterMacroAssembler::profile_ret(Register return_bci,
                                             Register mdp) {
   if (ProfileInterpreter) {
     Label profile_continue;
     uint row;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // Update the total ret count.
     increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
     for (row = 0; row < RetData::row_limit(); row++) {
       Label next_test;
       // See if return_bci is equal to bci[n]:
       test_mdp_data_at(mdp,
                        in_bytes(RetData::bci_offset(row)),
                        return_bci, noreg,
                        next_test);
       // return_bci is equal to bci[n].  Increment the count.
       increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
       // The method data pointer needs to be updated to reflect the new target.
       update_mdp_by_offset(mdp,
                            in_bytes(RetData::bci_displacement_offset(row)));
       beq(R0, R0, profile_continue);
       nop();
       bind(next_test);
     }
     update_mdp_for_ret(return_bci);
     bind(profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
     // The method data pointer needs to be updated.
     int mdp_delta = in_bytes(BitData::bit_data_size());
     if (TypeProfileCasts) {
       mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
     }
     update_mdp_by_constant(mdp, mdp_delta);
     bind(profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
   if (ProfileInterpreter && TypeProfileCasts) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     int count_offset = in_bytes(CounterData::count_offset());
     // Back up the address, since we have already bumped the mdp.
     count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
     // *Decrement* the counter.  We expect to see zero or small negatives.
     increment_mdp_data_at(mdp, count_offset, true);
     bind (profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // The method data pointer needs to be updated.
     int mdp_delta = in_bytes(BitData::bit_data_size());
     if (TypeProfileCasts) {
       mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
       // Record the object type.
       record_klass_in_profile(klass, mdp, reg2, false);
     }
     update_mdp_by_constant(mdp, mdp_delta);
     bind(profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // Update the default case count
     increment_mdp_data_at(mdp, in_bytes(MultiBranchData::default_count_offset()));
     // The method data pointer needs to be updated.
     update_mdp_by_offset(mdp, in_bytes(MultiBranchData:: default_displacement_offset()));
     bind(profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_switch_case(Register index,
                                                     Register mdp,
                                                     Register reg2) {
   if (ProfileInterpreter) {
     Label profile_continue;
     // If no method data exists, go to profile_continue.
     test_method_data_pointer(mdp, profile_continue);
     // Build the base (index * per_case_size_in_bytes()) + case_array_offset_in_bytes()
     move(reg2, in_bytes(MultiBranchData::per_case_size()));
     dmult(index, reg2);
     mflo(index);
 //    addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ?
     daddiu(index, index, in_bytes(MultiBranchData::case_array_offset()));
     // Update the case count
     increment_mdp_data_at(mdp, index, in_bytes(MultiBranchData::relative_count_offset()));
     // The method data pointer needs to be updated.
     update_mdp_by_offset(mdp, index, in_bytes(MultiBranchData:: relative_displacement_offset()));
     bind(profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) {
   Label update, next, none;
   verify_oop(obj);
   //testptr(obj, obj);
   //jccb(Assembler::notZero, update);
   bne(obj, R0, update);
   nop();
   //orptr(mdo_addr, TypeEntries::null_seen);
   push(T1);
   if (mdo_addr.index() == noreg) {
     ld(T1, mdo_addr);
   } else {
     guarantee(T1 != mdo_addr.base(), "The base register will be corrupted !");
     guarantee(T1 != mdo_addr.index(), "The index register will be corrupted !");
     dsll(AT, mdo_addr.index(), mdo_addr.scale());
     daddu(AT, AT, mdo_addr.base());
     ld(T1, AT, mdo_addr.disp());
   }
   li(AT, TypeEntries::null_seen);
   orr(AT, T1, AT);
   if (mdo_addr.index() == noreg) {
     sd(AT, mdo_addr);
   } else {
     guarantee(T1 != mdo_addr.base(), "The base register will be corrupted !");
     guarantee(T1 != mdo_addr.index(), "The index register will be corrupted !");
     dsll(T1, mdo_addr.index(), mdo_addr.scale());
     daddu(T1, T1, mdo_addr.base());
     sd(AT, T1, mdo_addr.disp());
   }
   pop(T1);
   //jmpb(next);
   beq(R0, R0, next);
   nop();
   bind(update);
   load_klass(obj, obj);
   //xorptr(obj, mdo_addr);
   if (mdo_addr.index() == noreg) {
     ld(AT, mdo_addr);
   } else {
     dsll(AT, mdo_addr.index(), mdo_addr.scale());
     daddu(AT, AT, mdo_addr.base());
     ld(AT, AT, mdo_addr.disp());
   }
   xorr(obj, obj, AT);
   //testptr(obj, TypeEntries::type_klass_mask);
   //jccb(Assembler::zero, next); // klass seen before, nothing to
                                // do. The unknown bit may have been
                                // set already but no need to check.
   li(AT, TypeEntries::type_klass_mask);
   andr(AT, obj, AT);
   beq(AT, R0, next);
   nop();
   //testptr(obj, TypeEntries::type_unknown);
   //jccb(Assembler::notZero, next); // already unknown. Nothing to do anymore.
   li(AT, TypeEntries::type_unknown);
   andr(AT, AT, obj);
   bne(AT, R0, next);
   nop();
   //cmpptr(mdo_addr, 0);
   //jccb(Assembler::equal, none);
   if (mdo_addr.index() == noreg) {
     ld(AT, mdo_addr);
   } else {
     dsll(AT, mdo_addr.index(), mdo_addr.scale());
     daddu(AT, AT, mdo_addr.base());
     ld(AT, AT, mdo_addr.disp());
   }
   beq(AT, R0, none);
   nop();
   //cmpptr(mdo_addr, TypeEntries::null_seen);
   //jccb(Assembler::equal, none);
   push(T1);
   if (mdo_addr.index() == noreg) {
     ld(T1, mdo_addr);
   } else {
     guarantee(T1 != mdo_addr.base(), "The base register will be corrupted !");
     guarantee(T1 != mdo_addr.index(), "The index register will be corrupted !");
     dsll(AT, mdo_addr.index(), mdo_addr.scale());
     daddu(AT, AT, mdo_addr.base());
     ld(T1, AT, mdo_addr.disp());
   }
   li(AT, TypeEntries::null_seen);
   subu(AT, AT, T1);
   pop(T1);
   beq(AT, R0, none);
   nop();
   // There is a chance that the checks above (re-reading profiling
   // data from memory) fail if another thread has just set the
   // profiling to this obj's klass
   //xorptr(obj, mdo_addr);
   //testptr(obj, TypeEntries::type_klass_mask);
   //jccb(Assembler::zero, next);
   if (mdo_addr.index() == noreg) {
     ld(AT, mdo_addr);
   } else {
     dsll(AT, mdo_addr.index(), mdo_addr.scale());
     daddu(AT, AT, mdo_addr.base());
     ld(AT, AT, mdo_addr.disp());
   }
   xorr(obj, obj, AT);
   li(AT, TypeEntries::type_klass_mask);
   andr(AT, obj, AT);
   beq(AT, R0, next);
   nop();
   // different than before. Cannot keep accurate profile.
   //orptr(mdo_addr, TypeEntries::type_unknown);
   //jmpb(next);
   push(T1);
   if (mdo_addr.index() == noreg) {
     ld(T1, mdo_addr);
   } else {
     guarantee(T1 != mdo_addr.base(), "The base register will be corrupted !");
     guarantee(T1 != mdo_addr.index(), "The index register will be corrupted !");
     dsll(AT, mdo_addr.index(), mdo_addr.scale());
     daddu(AT, AT, mdo_addr.base());
     ld(T1, AT, mdo_addr.disp());
   }
   li(AT, TypeEntries::type_unknown);
   orr(AT, T1, AT);
   if (mdo_addr.index() == noreg) {
     sd(AT, mdo_addr);
   } else {
     guarantee(T1 != mdo_addr.base(), "The base register will be corrupted !");
     guarantee(T1 != mdo_addr.index(), "The index register will be corrupted !");
     dsll(T1, mdo_addr.index(), mdo_addr.scale());
     daddu(T1, T1, mdo_addr.base());
     sd(AT, T1, mdo_addr.disp());
   }
   pop(T1);
   beq(R0, R0, next);
   nop();
   bind(none);
   // first time here. Set profile type.
   //movptr(mdo_addr, obj);
   if (mdo_addr.index() == noreg) {
     sd(obj, mdo_addr);
   } else {
     dsll(AT, mdo_addr.index(), mdo_addr.scale());
     daddu(AT, AT, mdo_addr.base());
     sd(obj, AT, mdo_addr.disp());
   }
   bind(next);
 }
 void InterpreterMacroAssembler::profile_arguments_type(Register mdp, Register callee, Register tmp, bool is_virtual) {
   if (!ProfileInterpreter) {
     return;
   }
   if (MethodData::profile_arguments() || MethodData::profile_return()) {
     Label profile_continue;
     test_method_data_pointer(mdp, profile_continue);
     int off_to_start = is_virtual ? in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size());
     //cmpb(Address(mdp, in_bytes(DataLayout::tag_offset()) - off_to_start), is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag);
     //jcc(Assembler::notEqual, profile_continue);
     lb(AT, mdp, in_bytes(DataLayout::tag_offset()) - off_to_start);
     li(tmp, is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag);
     bne(tmp, AT, profile_continue);
     nop();
     if (MethodData::profile_arguments()) {
       Label done;
       int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset());
       //addptr(mdp, off_to_args);
       if (Assembler::is_simm16(off_to_args)) {
         daddiu(mdp, mdp, off_to_args);
       } else {
         move(AT, off_to_args);
         daddu(mdp, mdp, AT);
       }
       for (int i = 0; i < TypeProfileArgsLimit; i++) {
         if (i > 0 || MethodData::profile_return()) {
           // If return value type is profiled we may have no argument to profile
           //movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
           ld(tmp, mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args);
           //subl(tmp, i*TypeStackSlotEntries::per_arg_count());
           if (Assembler::is_simm16(-1 * i * TypeStackSlotEntries::per_arg_count())) {
             addiu32(tmp, tmp, -1 * i * TypeStackSlotEntries::per_arg_count());
           } else {
             li(AT, i*TypeStackSlotEntries::per_arg_count());
             subu32(tmp, tmp, AT);
           }
           //cmpl(tmp, TypeStackSlotEntries::per_arg_count());
           //jcc(Assembler::less, done);
           li(AT, TypeStackSlotEntries::per_arg_count());
           slt(AT, tmp, AT);
           bne(AT, R0, done);
           nop();
         }
         //movptr(tmp, Address(callee, Method::const_offset()));
         ld(tmp, callee, in_bytes(Method::const_offset()));
         //load_unsigned_short(tmp, Address(tmp, ConstMethod::size_of_parameters_offset()));
         lhu(tmp, tmp, in_bytes(ConstMethod::size_of_parameters_offset()));
         // stack offset o (zero based) from the start of the argument
         // list, for n arguments translates into offset n - o - 1 from
         // the end of the argument list
         //subptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args));
         ld(AT, mdp, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args);
         subu(tmp, tmp, AT);
         //subl(tmp, 1);
         addiu32(tmp, tmp, -1);
         Address arg_addr = argument_address(tmp);
         //movptr(tmp, arg_addr);
         ld(tmp, arg_addr);
         Address mdo_arg_addr(mdp, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args);
         profile_obj_type(tmp, mdo_arg_addr);
         int to_add = in_bytes(TypeStackSlotEntries::per_arg_size());
         //addptr(mdp, to_add);
         if (Assembler::is_simm16(to_add)) {
           daddiu(mdp, mdp, to_add);
         } else {
           move(AT, to_add);
           daddu(mdp, mdp, AT);
         }
         off_to_args += to_add;
       }
       if (MethodData::profile_return()) {
         //movptr(tmp, Address(mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args));
         ld(tmp, mdp, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args);
         //subl(tmp, TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count());
         int tmp_arg_counts = TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count();
         if (Assembler::is_simm16(-1 * tmp_arg_counts)) {
           addiu32(tmp, tmp, -1 * tmp_arg_counts);
         } else {
           move(AT, tmp_arg_counts);
           subu32(mdp, mdp, AT);
         }
       }
       bind(done);
       if (MethodData::profile_return()) {
         // We're right after the type profile for the last
         // argument. tmp is the number of cells left in the
         // CallTypeData/VirtualCallTypeData to reach its end. Non null
         // if there's a return to profile.
         assert(ReturnTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), "can't move past ret type");
         //shll(tmp, exact_log2(DataLayout::cell_size));
         //addptr(mdp, tmp);
         sll(tmp, tmp, exact_log2(DataLayout::cell_size));
         daddu(mdp, mdp, tmp);
       }
       //movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), mdp);
       sd(mdp, FP, frame::interpreter_frame_mdx_offset * wordSize);
     } else {
       assert(MethodData::profile_return(), "either profile call args or call ret");
       update_mdp_by_constant(mdp, in_bytes(TypeEntriesAtCall::return_only_size()));
     }
     // mdp points right after the end of the
     // CallTypeData/VirtualCallTypeData, right after the cells for the
     // return value type if there's one
     bind(profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_return_type(Register mdp, Register ret, Register tmp) {
   assert_different_registers(mdp, ret, tmp, _bcp_register);
   if (ProfileInterpreter && MethodData::profile_return()) {
     Label profile_continue, done;
     test_method_data_pointer(mdp, profile_continue);
     if (MethodData::profile_return_jsr292_only()) {
       // If we don't profile all invoke bytecodes we must make sure
       // it's a bytecode we indeed profile. We can't go back to the
       // begining of the ProfileData we intend to update to check its
       // type because we're right after it and we don't known its
       // length
       Label do_profile;
       //cmpb(Address(_bcp_register, 0), Bytecodes::_invokedynamic);
       //jcc(Assembler::equal, do_profile);
       lb(AT, _bcp_register, 0);
       daddiu(AT, AT, -1 * Bytecodes::_invokedynamic);
       beq(AT, R0, do_profile);
       nop();
       //cmpb(Address(_bcp_register, 0), Bytecodes::_invokehandle);
       //jcc(Assembler::equal, do_profile);
       lb(AT, _bcp_register, 0);
       daddiu(AT, AT, -1 * Bytecodes::_invokehandle);
       beq(AT, R0, do_profile);
       nop();
       get_method(tmp);
       //cmpb(Address(tmp, Method::intrinsic_id_offset_in_bytes()), vmIntrinsics::_compiledLambdaForm);
       //jcc(Assembler::notEqual, profile_continue);
       lb(tmp, tmp, Method::intrinsic_id_offset_in_bytes());
       li(AT, vmIntrinsics::_compiledLambdaForm);
       bne(tmp, AT, profile_continue);
       nop();
       bind(do_profile);
     }
     Address mdo_ret_addr(mdp, -in_bytes(ReturnTypeEntry::size()));
     //mov(tmp, ret);
     daddu(tmp, ret, R0);
     profile_obj_type(tmp, mdo_ret_addr);
     bind(profile_continue);
   }
 }
 void InterpreterMacroAssembler::profile_parameters_type(Register mdp, Register tmp1, Register tmp2) {
   guarantee(T9 == tmp1, "You are reqired to use T9 as the index register for MIPS !");
   if (ProfileInterpreter && MethodData::profile_parameters()) {
     Label profile_continue, done;
     test_method_data_pointer(mdp, profile_continue);
     // Load the offset of the area within the MDO used for
     // parameters. If it's negative we're not profiling any parameters
     //movl(tmp1, Address(mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset())));
     //testl(tmp1, tmp1);
     //jcc(Assembler::negative, profile_continue);
     lw(tmp1, mdp, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset()));
     bltz(tmp1, profile_continue);
     nop();
     // Compute a pointer to the area for parameters from the offset
     // and move the pointer to the slot for the last
     // parameters. Collect profiling from last parameter down.
     // mdo start + parameters offset + array length - 1
     //addptr(mdp, tmp1);
     //movptr(tmp1, Address(mdp, ArrayData::array_len_offset()));
     daddu(mdp, mdp, tmp1);
     ld(tmp1, mdp, in_bytes(ArrayData::array_len_offset()));
     decrement(tmp1, TypeStackSlotEntries::per_arg_count());
     Label loop;
     bind(loop);
     int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0));
     int type_base = in_bytes(ParametersTypeData::type_offset(0));
     Address::ScaleFactor per_arg_scale = Address::times(DataLayout::cell_size);
     //Address arg_off(mdp, tmp1, per_arg_scale, off_base);
     Address arg_type(mdp, tmp1, per_arg_scale, type_base);
     // load offset on the stack from the slot for this parameter
     //movptr(tmp2, arg_off);
     dsll(AT, tmp1, per_arg_scale);
     daddu(AT, AT, mdp);
     ld(tmp2, AT, off_base);
     //negptr(tmp2);
     subu(tmp2, R0, tmp2);
     // read the parameter from the local area
     //movptr(tmp2, Address(_locals_register, tmp2, Interpreter::stackElementScale()));
     dsll(AT, tmp2, Interpreter::stackElementScale());
     daddu(AT, AT, _locals_register);
     ld(tmp2, AT, 0);
     // profile the parameter
     profile_obj_type(tmp2, arg_type);
     // go to next parameter
     decrement(tmp1, TypeStackSlotEntries::per_arg_count());
     //jcc(Assembler::positive, loop);
     bgtz(tmp1, loop);
     nop();
     bind(profile_continue);
   }
 }
 void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
   if (state == atos) {
     MacroAssembler::verify_oop(reg);
   }
 }
 void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
   // only if +VerifyFPU  && (state == ftos || state == dtos)
   // For now, do nothing.
 }
 #endif // !CC_INTERP
 //FIXME, aoqi:see UltraViolet
 void InterpreterMacroAssembler::notify_method_entry() {
   // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
   // track stack depth.  If it is possible to enter interp_only_mode we add
   // the code to check if the event should be sent.
   //Register tempreg = Rscratch0;
   Register tempreg = T0;
   if (JvmtiExport::can_post_interpreter_events()) {
     Label L;
     //movl(rdx, Address(r15_thread, JavaThread::interp_only_mode_offset()));
     //testl(rdx, rdx);
     //jcc(Assembler::zero, L);
     //lw(tempreg, in_bytes(JavaThread::interp_only_mode_offset()), Rthread);
     get_thread(AT);
     lw(tempreg, AT, in_bytes(JavaThread::interp_only_mode_offset()));
     beq(tempreg, R0, L);
     delayed()->nop();
     call_VM(noreg, CAST_FROM_FN_PTR(address,
                                     InterpreterRuntime::post_method_entry));
     bind(L);
   }
   {
     //SkipIfEqual skip_if(this, tempreg, R0, &DTraceMethodProbes, 1);
     SkipIfEqual skip_if(this, &DTraceMethodProbes, 0);
     call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry),
 		 //Rthread,
 		 AT,
 		 //Rmethod);
 		 S3);
   }
 }
 //FIXME, aoqi:see UltraViolet
 void InterpreterMacroAssembler::notify_method_exit(
     //TosState state, NotifyMethodExitMode mode) {
     bool is_native_method, TosState state, NotifyMethodExitMode mode) {
   // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
   // track stack depth.  If it is possible to enter interp_only_mode we add
   // the code to check if the event should be sent.
   //Register tempreg = Rscratch0;
   Register tempreg = T0;
   if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
     Label skip;
     //lw(tempreg, in_bytes(JavaThread::interp_only_mode_offset()), Rthread);
     get_thread(AT);
     lw(tempreg, AT, in_bytes(JavaThread::interp_only_mode_offset()));
     beq(tempreg, R0, skip);
     delayed()->nop();
     // Note: frame::interpreter_frame_result has a dependency on how the
     // method result is saved across the call to post_method_exit. If this
     // is changed then the interpreter_frame_result implementation will
     // need to be updated too.
     // For c++ interpreter the result is always stored at a known location in the frame
     // template interpreter will leave it on the top of the stack.
     save_return_value(state, is_native_method);
     call_VM(noreg,
             CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
     restore_return_value(state, is_native_method);
     bind(skip);
   }
   {
     // Dtrace notification
     //SkipIfEqual skip_if(this, tempreg, R0, &DTraceMethodProbes, equal);
     SkipIfEqual skip_if(this, &DTraceMethodProbes, 0);
     save_return_value(state, is_native_method);
     call_VM_leaf(
 		 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
 		 //Rthread, Rmethod);
 		 AT, S3);
     restore_return_value(state, is_native_method);
   }
 }
 //FIXME  yyq native return 64 bits
 void InterpreterMacroAssembler::save_return_value(
     TosState state, bool is_native_call) {
   if (is_native_call) {
     // save any potential method result value
     //sd(V0, frame::interpreter_frame_l_scratch_offset * wordSize, FP);
     //sdc1(F0, frame::interpreter_frame_d_scratch_offset * wordSize, FP);
     sw(V0, FP, (-9) * wordSize);
     swc1(F0, FP, (-10) * wordSize);
 //    sd(V0, FP, (-9) * wordSize);
 //    sdc1(F0, FP, (-10) * wordSize);
   } else {
     push(state);
   }
 }
 //FIXME  yyq native return 64 bits
 void InterpreterMacroAssembler::restore_return_value(
     TosState state, bool is_native_call) {
   if (is_native_call) {
     // Restore any method result value
     //ld(V0, frame::interpreter_frame_l_scratch_offset * wordSize, FP);
     //ldc1(F0, frame::interpreter_frame_d_scratch_offset * wordSize, FP);
     lw(V0, FP, (-9) * wordSize);
     lwc1(F0, FP, (-10) * wordSize);
   } else {
     pop(state);
   }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/mips/vm/interp_masm_mips_64.cpp@d885f8d65c58 (annotated)

src/cpu/mips/vm/interp_masm_mips_64.cpp