jdk8-mips64-public/hotspot: src/cpu/mips/vm/c1_LIRGenerator

src/cpu/mips/vm/c1_LIRGenerator_mips.cpp@d885f8d65c58 (annotated)

src/cpu/mips/vm/c1_LIRGenerator_mips.cpp

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

author: fujie
date: Tue, 26 Jul 2016 17:06:17 +0800
changeset 41: d885f8d65c58
parent 1: 2d8a650513c2
child 6880: 52ea28d233d2
permissions: -rw-r--r--

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

 /*
  * Copyright (c) 2005, 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 "c1/c1_Compilation.hpp"
 #include "c1/c1_FrameMap.hpp"
 #include "c1/c1_Instruction.hpp"
 #include "c1/c1_LIRAssembler.hpp"
 #include "c1/c1_LIRGenerator.hpp"
 #include "c1/c1_Runtime1.hpp"
 #include "c1/c1_ValueStack.hpp"
 #include "ci/ciArray.hpp"
 #include "ci/ciObjArrayKlass.hpp"
 #include "ci/ciTypeArrayKlass.hpp"
 #include "runtime/sharedRuntime.hpp"
 #include "runtime/stubRoutines.hpp"
 #include "vmreg_mips.inline.hpp"
 #ifdef ASSERT
 #define __ gen()->lir(__FILE__, __LINE__)->
 #else
 #define __ gen()->lir()->
 #endif
 // Item will be loaded into a byte register; Intel only
 void LIRItem::load_byte_item() {
   load_item();
   LIR_Opr res = result();
   if (!res->is_virtual() || !_gen->is_vreg_flag_set(res, LIRGenerator::byte_reg)) {
     // make sure that it is a byte register
     assert(!value()->type()->is_float() && !value()->type()->is_double(),
            "can't load floats in byte register");
     LIR_Opr reg = _gen->rlock_byte(T_BYTE);
     __ move(res, reg);
     _result = reg;
   }
 }
 void LIRItem::load_nonconstant() {
   LIR_Opr r = value()->operand();
   if (r->is_constant()) {
     _result = r;
   } else {
     load_item();
   }
 }
 //--------------------------------------------------------------
 //               LIRGenerator
 //--------------------------------------------------------------
 LIR_Opr LIRGenerator::exceptionOopOpr()              { return FrameMap::_v0_oop_opr;     }
 LIR_Opr LIRGenerator::exceptionPcOpr()               { return FrameMap::_v1_opr;     }
 LIR_Opr LIRGenerator::divInOpr()                     { return FrameMap::_a0_opr; }//FIXME
 LIR_Opr LIRGenerator::divOutOpr()                    { return FrameMap::_f0_opr; } //FIXME
 LIR_Opr LIRGenerator::remOutOpr()                    { return FrameMap::_f0_opr; } //FIXME
 LIR_Opr LIRGenerator::shiftCountOpr()                { return FrameMap::_t3_opr; } //
 LIR_Opr LIRGenerator::syncTempOpr()                  { return FrameMap::_t2_opr;     }
 LIR_Opr LIRGenerator::getThreadTemp()                { return  LIR_OprFact::illegalOpr;  } //
 LIR_Opr LIRGenerator::result_register_for(ValueType* type, bool callee) {
 	LIR_Opr opr;
 	switch (type->tag()) {
 		case intTag:
 			{
 				opr = FrameMap::_v0_opr;
 				break;
 			}
 		case objectTag:
 			{
 				opr = FrameMap::_v0_oop_opr;
 				break;
 			}
 		case longTag:
 			{
 				opr = FrameMap::_v0_v1_long_opr;
 				break;
 			}
 		case floatTag:
 			{
 				opr = FrameMap::_f0_float_opr;
 				break;
 			}
 		case doubleTag:  {
 					 opr = FrameMap::_d0_double_opr;
 					 break;
 				 }
 		case addressTag:
 		default: ShouldNotReachHere(); return LIR_OprFact::illegalOpr;
 	}
 	assert(opr->type_field() == as_OprType(as_BasicType(type)), "type mismatch");
 	return opr;
 }
 LIR_Opr LIRGenerator::rlock_callee_saved(BasicType type) {
 	LIR_Opr reg = new_register(type);
 	set_vreg_flag(reg, callee_saved);
 	return reg;
 }
 LIR_Opr LIRGenerator::rlock_byte(BasicType type) {
 	return new_register(T_INT);
 }
 /*
 LIR_Opr LIRGenerator::rlock_byte(BasicType type) {
   LIR_Opr reg = new_register(T_INT);
   set_vreg_flag(reg, LIRGenerator::byte_reg);
   return reg;
 }
 */
 //--------- loading items into registers --------------------------------
 // i486 instructions can inline constants
 bool LIRGenerator::can_store_as_constant(Value v, BasicType type) const {
   if (type == T_SHORT || type == T_CHAR) {
     // there is no immediate move of word values in asembler_i486.?pp
     return false;
   }
   Constant* c = v->as_Constant();
   if (c && c->state_before() == NULL) {
     // constants of any type can be stored directly, except for
     // unloaded object constants.
     return true;
   }
   return false;
 }
 bool LIRGenerator::can_inline_as_constant(Value v) const {
 	if (v->type()->is_constant() && v->type()->as_IntConstant() != NULL) {
 		return Assembler::is_simm16(v->type()->as_IntConstant()->value());
 	} else {
 	  return false;
 	}
 }
 bool LIRGenerator::can_inline_as_constant(LIR_Const* c) const {
 	if (c->type() == T_INT && c->as_constant() != NULL) {
 		return Assembler::is_simm16(c->as_jint());
 	} else {
 	  return false;
 	}
 }
 LIR_Opr LIRGenerator::safepoint_poll_register() {
   return new_register(T_INT);
 }
 LIR_Address* LIRGenerator::generate_address(LIR_Opr base, LIR_Opr index,
                                             int shift, int disp, BasicType type) {
 	/*  assert(base->is_register(), "must be");
 	    if (index->is_constant()) {
 	    return new LIR_Address(base,
 	    (index->as_constant_ptr()->as_jint() << shift) + disp,
 	    type);
 	    } else {
 	    return new LIR_Address(base, index, (LIR_Address::Scale)shift, disp, type);
 	    }
 	    */
 	assert(base->is_register(), "must be");
 	if (index->is_constant()) {
 		disp += index->as_constant_ptr()->as_jint() << shift;
 		if (Assembler::is_simm16(disp)) {
 			return new LIR_Address(base,disp, type);
 		} else {
 		if(disp!=0){
 #ifdef _LP64
 			LIR_Opr tmp = new_register(T_LONG);
 #else
 			LIR_Opr tmp = new_register(T_INT);
 #endif
 			__ move(LIR_OprFact::intConst((int)disp), tmp);
 			__ add(tmp, base, tmp);
 			return new LIR_Address(tmp, 0, type);
 		}
 		else
 			return new LIR_Address(base, 0, type);
 		}
 	}
 	else if( index->is_register()){
 #ifdef _LP64
 		LIR_Opr tmpa = new_register(T_LONG);
 #else
 		LIR_Opr tmpa = new_register(T_INT);
 #endif
 		__ move(index, tmpa);
 		__ shift_left(tmpa, shift, tmpa);
 		__ add(tmpa,base, tmpa);
 		if (Assembler::is_simm16(disp)) {
 			return new LIR_Address(tmpa, disp, type);
 		} else {
 		if(disp!=0){
 #ifdef _LP64
 			LIR_Opr tmp = new_register(T_LONG);
 #else
 			LIR_Opr tmp = new_register(T_INT);
 #endif
 			__ move(LIR_OprFact::intConst((int)disp), tmp);
 			__ add(tmp, tmpa, tmp);
 			return new LIR_Address(tmp, 0, type);
 		}
 		else
 			return new LIR_Address(tmpa, 0, type);
 		}
 	}
 	else {
 		if (Assembler::is_simm16(disp)) {
 			return new LIR_Address(base,disp, type);
 		} else {
 		if(disp!=0){
 #ifdef _LP64
 			LIR_Opr tmp = new_register(T_LONG);
 #else
 			LIR_Opr tmp = new_register(T_INT);
 #endif
 			__ move(LIR_OprFact::intConst((int)disp), tmp);
 			__ add(tmp, base, tmp);
 			return new LIR_Address(tmp, 0, type);
 		}
 	        else
 			return new LIR_Address(base, 0, type);
 		}
 	}
 }
 LIR_Address* LIRGenerator::emit_array_address(LIR_Opr array_opr, LIR_Opr index_opr,BasicType type, bool needs_card_mark) {
 	int offset_in_bytes = arrayOopDesc::base_offset_in_bytes(type);
 	LIR_Address* addr;
 	if (index_opr->is_constant()) {
 		int elem_size = _type2aelembytes[type];
 		addr = new LIR_Address(array_opr,
 				offset_in_bytes + index_opr->as_jint() * elem_size, type);
 	} else if( index_opr->is_register()){
 #ifdef _LP64
 		LIR_Opr tmp = new_register(T_LONG);
 #else
 		LIR_Opr tmp = new_register(T_INT);
 #endif
 		__ move(index_opr, tmp);
 		__ shift_left(tmp, LIR_Address::scale(type),tmp);
 		__ add(tmp, array_opr, tmp);
 		addr =  new LIR_Address(tmp, offset_in_bytes,type);
 		//		addr =  new LIR_Address(array_opr,
 //				index_opr,
 //				LIR_Address::scale(type),
 //				offset_in_bytes, type);
 	}
 	else{
 		addr = new LIR_Address(array_opr,
 				offset_in_bytes, type);
 	}
 	if (needs_card_mark) {
 		// This store will need a precise card mark, so go ahead and
 		// compute the full adddres instead of computing once for the
 		// store and again for the card mark.
 #ifdef _LP64
 		LIR_Opr tmp = new_register(T_ADDRESS);
 #else
 		LIR_Opr tmp = new_register(T_INT);
 #endif
 		__ leal(LIR_OprFact::address(addr), tmp);
 		return new LIR_Address(tmp, 0, type);
 	} else {
 		return addr;
 	}
 }
 LIR_Opr LIRGenerator::load_immediate(int x, BasicType type) {
   LIR_Opr r;
   if (type == T_LONG) {
     r = LIR_OprFact::longConst(x);
   } else if (type == T_INT) {
     r = LIR_OprFact::intConst(x);
   } else {
     ShouldNotReachHere();
   }
   return r;
 }
 void LIRGenerator::increment_counter(address counter, BasicType type, int step) {
 	LIR_Opr temp = new_register(T_INT);
 	LIR_Opr pointer = new_register(T_INT);
 #ifndef _LP64
 //by_css
 	__ move(LIR_OprFact::intConst((int)counter), pointer);
 #else
 	__ move(LIR_OprFact::longConst((long)counter), pointer);
 #endif
 	LIR_Opr addr = (LIR_Opr)new LIR_Address(pointer, type);
 	LIR_Opr c = LIR_OprFact::intConst((int)step);
 	__ add(addr, c, addr);
 }
 void LIRGenerator::increment_counter(LIR_Address* addr, int step) {
   Unimplemented();
 }
 bool LIRGenerator::strength_reduce_multiply(LIR_Opr left, int c, LIR_Opr result, LIR_Opr tmp) {
   if (tmp->is_valid()) {
     if (is_power_of_2(c + 1)) {
       __ move(left, result);
       __ shift_left(result, log2_intptr(c + 1), result);
       __ sub(result, left, result);
       return true;
     } else if (is_power_of_2(c - 1)) {
       __ move(left, result);
       __ shift_left(result, log2_intptr(c - 1), result);
       __ add(result, left, result);
       return true;
     }
   }
   return false;
 }
 void LIRGenerator::store_stack_parameter (LIR_Opr item, ByteSize offset_from_sp) {
 	BasicType type = item->type();
 	__ store(item, new LIR_Address(FrameMap::_sp_opr, in_bytes(offset_from_sp), type));
 }
 //----------------------------------------------------------------------
 //             visitor functions
 //----------------------------------------------------------------------
 void LIRGenerator::do_StoreIndexed(StoreIndexed* x) {
   assert(x->is_pinned(),"");
   bool needs_range_check = true;
   bool use_length = x->length() != NULL;
   bool obj_store = x->elt_type() == T_ARRAY || x->elt_type() == T_OBJECT;
   bool needs_store_check = obj_store && (x->value()->as_Constant() == NULL ||
                                          !get_jobject_constant(x->value())->is_null_object());
   LIRItem array(x->array(), this);
   LIRItem index(x->index(), this);
   LIRItem value(x->value(), this);
   LIRItem length(this);
   array.load_item();
   index.load_nonconstant();
   if (use_length) {
     needs_range_check = x->compute_needs_range_check();
     if (needs_range_check) {
       length.set_instruction(x->length());
       length.load_item();
     }
   }
   if (needs_store_check) {
     value.load_item();
   } else {
     value.load_for_store(x->elt_type());
   }
   set_no_result(x);
   // the CodeEmitInfo must be duplicated for each different
   // LIR-instruction because spilling can occur anywhere between two
   // instructions and so the debug information must be different
   CodeEmitInfo* range_check_info = state_for(x);
   CodeEmitInfo* null_check_info = NULL;
   if (x->needs_null_check()) {
     null_check_info = new CodeEmitInfo(range_check_info);
   }
   // emit array address setup early so it schedules better
   LIR_Address* array_addr = emit_array_address(array.result(), index.result(), x->elt_type(), obj_store);
   if (GenerateRangeChecks && needs_range_check) {
     if (use_length) {
       __ branch(lir_cond_belowEqual, length.result(),index.result(),T_INT,new RangeCheckStub(range_check_info, index.result()));
     } else {
       array_range_check(array.result(), index.result(), null_check_info, range_check_info);
       // range_check also does the null check
       null_check_info = NULL;
     }
   }
   if (GenerateArrayStoreCheck && needs_store_check) {
     LIR_Opr tmp1 = new_register(objectType);
     LIR_Opr tmp2 = new_register(objectType);
     LIR_Opr tmp3 = new_register(objectType);
     CodeEmitInfo* store_check_info = new CodeEmitInfo(range_check_info);
     __ store_check(value.result(), array.result(), tmp1, tmp2, tmp3, store_check_info, x->profiled_method(), x->profiled_bci());
   }
   if (obj_store) {
     // Needs GC write barriers.
     pre_barrier(LIR_OprFact::address(array_addr), LIR_OprFact::illegalOpr, true, false, NULL);
     __ move(value.result(), array_addr, null_check_info);
     // Seems to be a precise
     post_barrier(LIR_OprFact::address(array_addr), value.result());
   } else {
     __ move(value.result(), array_addr, null_check_info);
   }
 }
 void LIRGenerator::do_MonitorEnter(MonitorEnter* x) {
   assert(x->is_pinned(),"");
   LIRItem obj(x->obj(), this);
   obj.load_item();
   set_no_result(x);
   // "lock" stores the address of the monitor stack slot, so this is not an oop
 #ifdef _LP64
   LIR_Opr lock = new_register(T_LONG);
 #else
   LIR_Opr lock = new_register(T_INT);
 #endif
   // Need a scratch register for biased locking on mips
   LIR_Opr scratch = LIR_OprFact::illegalOpr;
   if (UseBiasedLocking) {
     scratch = new_register(T_INT);
   }
   CodeEmitInfo* info_for_exception = NULL;
   if (x->needs_null_check()) {
     info_for_exception = state_for(x);
   }
   // this CodeEmitInfo must not have the xhandlers because here the
   // object is already locked (xhandlers expect object to be unlocked)
   CodeEmitInfo* info = state_for(x, x->state(), true);
   monitor_enter(obj.result(), lock, syncTempOpr(), scratch,
                         x->monitor_no(), info_for_exception, info);
 }
 void LIRGenerator::do_MonitorExit(MonitorExit* x) {
   assert(x->is_pinned(),"");
   LIRItem obj(x->obj(), this);
   obj.dont_load_item();
   LIR_Opr lock = new_register(T_INT);
   LIR_Opr obj_temp = new_register(T_INT);
   set_no_result(x);
   monitor_exit(obj_temp, lock, syncTempOpr(), LIR_OprFact::illegalOpr, x->monitor_no());
 }
 // _ineg, _lneg, _fneg, _dneg
 void LIRGenerator::do_NegateOp(NegateOp* x) {
   LIRItem value(x->x(), this);
   value.set_destroys_register();
   value.load_item();
   LIR_Opr reg = rlock(x);
   __ negate(value.result(), reg);
   set_result(x, round_item(reg));
 }
 // for  _fadd, _fmul, _fsub, _fdiv, _frem
 //      _dadd, _dmul, _dsub, _ddiv, _drem
 void LIRGenerator::do_ArithmeticOp_FPU(ArithmeticOp* x) {
   LIR_Opr tmp;
   LIRItem left(x->x(), this);
   LIRItem right(x->y(), this);
   left.load_item();
   right.load_item();
   rlock_result(x);
   switch (x->op()) {
     case Bytecodes::_drem:
       tmp = new_register(T_DOUBLE);
       __ frem(left.result(), right.result(), x->operand(), tmp);
       break;
     case Bytecodes::_frem:
       tmp = new_register(T_FLOAT);
       __ frem(left.result(), right.result(), x->operand(), tmp);
       break;
     default: arithmetic_op_fpu(x->op(), x->operand(), left.result(), right.result(), x->is_strictfp());
   }
 }
 // for  _ladd, _lmul, _lsub, _ldiv, _lrem
 void LIRGenerator::do_ArithmeticOp_Long(ArithmeticOp* x) {
   switch (x->op()) {
   case Bytecodes::_lrem:
   case Bytecodes::_lmul:
   case Bytecodes::_ldiv: {
     if (x->op() == Bytecodes::_ldiv || x->op() == Bytecodes::_lrem) {
       LIRItem right(x->y(), this);
       right.load_item();
       CodeEmitInfo* info = state_for(x);
       LIR_Opr item = right.result();
       assert(item->is_register(), "must be");
       __ branch(lir_cond_equal,item,LIR_OprFact::longConst(0), T_LONG, new DivByZeroStub(info));
     }
     address entry;
     switch (x->op()) {
     case Bytecodes::_lrem:
       entry = CAST_FROM_FN_PTR(address, SharedRuntime::lrem);
       break; // check if dividend is 0 is done elsewhere
     case Bytecodes::_ldiv:
       entry = CAST_FROM_FN_PTR(address, SharedRuntime::ldiv);
       break; // check if dividend is 0 is done elsewhere
     case Bytecodes::_lmul:
       entry = CAST_FROM_FN_PTR(address, SharedRuntime::lmul);
       break;
     default:
       ShouldNotReachHere();
     }
     // order of arguments to runtime call is reversed.
     LIR_Opr result = call_runtime(x->y(), x->x(), entry, x->type(), NULL);
     set_result(x, result);
     break;
   }
   /* _ladd, _lsub is delete in sharedRuntime.hpp
   case Bytecodes::_ladd:
   case Bytecodes::_lsub:  {
     address entry;
     switch (x->op()) {
     case Bytecodes::_ladd:
       entry = CAST_FROM_FN_PTR(address, SharedRuntime::ladd);
       break; // check if dividend is 0 is done elsewhere
     case Bytecodes::_lsub:
       entry = CAST_FROM_FN_PTR(address, SharedRuntime::lsub);
       break; // check if dividend is 0 is done elsewhere
     default:
       ShouldNotReachHere();
     }
     // order of arguments to runtime call is reversed.
     LIR_Opr result = call_runtime(x->y(), x->x(), entry, x->type(), NULL);
     set_result(x, result);
     break;
   }*/
 /*  {
     LIRItem left(x->x(), this);
     LIRItem right(x->y(), this);
     left.load_item();
     right.load_item();
     rlock_result(x);
     arithmetic_op_long(x->op(), x->operand(), left.result(), right.result(), NULL);
     break;
   }
 */
   default: ShouldNotReachHere();
   }
 }
 // for: _iadd, _imul, _isub, _idiv, _irem
 void LIRGenerator::do_ArithmeticOp_Int(ArithmeticOp* x) {
   bool is_div_rem = x->op() == Bytecodes::_idiv || x->op() == Bytecodes::_irem;
   LIRItem left(x->x(), this);
   LIRItem right(x->y(), this);
   // missing test if instr is commutative and if we should swap
   right.load_nonconstant();
   assert(right.is_constant() || right.is_register(), "wrong state of right");
   left.load_item();
   rlock_result(x);
   if (is_div_rem) {
     CodeEmitInfo* info = state_for(x);
     LIR_Opr tmp =new_register(T_INT);
     if (x->op() == Bytecodes::_irem) {
       __ irem(left.result(), right.result(), x->operand(), tmp, info);
     } else if (x->op() == Bytecodes::_idiv) {
       __ idiv(left.result(), right.result(), x->operand(), tmp, info);
     }
   } else {
     //arithmetic_op_int(x->op(), x->operand(), left.result(),
     //right.result(), FrameMap::G1_opr);
     LIR_Opr tmp =new_register(T_INT);
     arithmetic_op_int(x->op(), x->operand(), left.result(), right.result(),
         tmp);
   }
 }
 void LIRGenerator::do_ArithmeticOp(ArithmeticOp* x) {
   // when an operand with use count 1 is the left operand, then it is
   // likely that no move for 2-operand-LIR-form is necessary
   if (x->is_commutative() && x->y()->as_Constant() == NULL && x->x()->use_count() > x->y()->use_count()) {
     x->swap_operands();
   }
   ValueTag tag = x->type()->tag();
   assert(x->x()->type()->tag() == tag && x->y()->type()->tag() == tag, "wrong parameters");
   switch (tag) {
     case floatTag:
     case doubleTag:  do_ArithmeticOp_FPU(x);  return;
     case longTag:    do_ArithmeticOp_Long(x); return;
     case intTag:     do_ArithmeticOp_Int(x);  return;
   }
   ShouldNotReachHere();
 }
 // _ishl, _lshl, _ishr, _lshr, _iushr, _lushr
 void LIRGenerator::do_ShiftOp(ShiftOp* x) {
   if(x->op() == Bytecodes::_lshl
       ||  x->op() == Bytecodes::_lshr
       ||  x->op() == Bytecodes::_lushr) {
     address entry;
     /* lushr, lshr, lshl, is delete in ShredRuntime.hpp
     switch (x->op()) {
     case Bytecodes::_lshl:
       entry = CAST_FROM_FN_PTR(address, SharedRuntime::lshl);
       break; // check if dividend is 0 is done elsewhere
     case Bytecodes::_lshr:
       entry = CAST_FROM_FN_PTR(address, SharedRuntime::lshr);
       break; // check if dividend is 0 is done elsewhere
     case Bytecodes::_lushr:
       entry = CAST_FROM_FN_PTR(address, SharedRuntime::lushr);
       break;
     default:
       ShouldNotReachHere();
     }
     */
     // order of arguments to runtime call is reversed.
     LIR_Opr result = call_runtime(x->y(), x->x(), entry, x->type(), NULL);
     set_result(x, result);
     return;
   }
   // count must always be in rcx
   LIRItem value(x->x(), this);
   LIRItem count(x->y(), this);
   ValueTag elemType = x->type()->tag();
   bool must_load_count = !count.is_constant() || elemType == longTag;
   if (must_load_count) {
     // count for long must be in register
     count.load_item();
   } else {
     count.dont_load_item();
   }
   value.load_item();
   LIR_Opr reg = rlock_result(x);
   shift_op(x->op(), reg, value.result(), count.result(), LIR_OprFact::illegalOpr);
 }
 // _iand, _land, _ior, _lor, _ixor, _lxor
 void LIRGenerator::do_LogicOp(LogicOp* x) {
   // when an operand with use count 1 is the left operand, then it is
   // likely that no move for 2-operand-LIR-form is necessary
   if (x->is_commutative() && x->y()->as_Constant() == NULL && x->x()->use_count() > x->y()->use_count()) {
     x->swap_operands();
   }
   LIRItem left(x->x(), this);
   LIRItem right(x->y(), this);
   left.load_item();
   right.load_nonconstant();
   LIR_Opr reg = rlock_result(x);
   logic_op(x->op(), reg, left.result(), right.result());
 }
 // _lcmp, _fcmpl, _fcmpg, _dcmpl, _dcmpg
 void LIRGenerator::do_CompareOp(CompareOp* x) {
   LIRItem left(x->x(), this);
   LIRItem right(x->y(), this);
   ValueTag tag = x->x()->type()->tag();
   if (tag == longTag) {
     left.set_destroys_register();
   }
   left.load_item();
   right.load_item();
   LIR_Opr reg = rlock_result(x);
   if (x->x()->type()->is_float_kind()) {
     Bytecodes::Code code = x->op();
     __ fcmp2int(left.result(), right.result(), reg, (code == Bytecodes::_fcmpl || code == Bytecodes::_dcmpl));
   } else if (x->x()->type()->tag() == longTag) {
     __ lcmp2int(left.result(), right.result(), reg);
   } else {
     Unimplemented();
   }
 }
 /*
 void LIRGenerator::do_AttemptUpdate(Intrinsic* x) {
 	assert(x->number_of_arguments() == 3, "wrong type");
 	LIRItem obj       (x->argument_at(0), this);  // AtomicLong object
 	LIRItem cmp_value (x->argument_at(1), this);  // value to compare with field
 	LIRItem new_value (x->argument_at(2), this);
 	// replace field with new_value if it matches cmp_value
 	// compare value must be in edx,eax (hi,lo); may be destroyed by cmpxchg8 instruction
 	//  cmp_value.load_item_force(FrameMap::eax_edx_long_opr);
 	cmp_value.load_item_force(FrameMap::_a0_a1_long_opr);
 	// new value must be in ecx,ebx (hi,lo)
 	// new_value.load_item_force(FrameMap::ebx_ecx_long_opr);
 	new_value.load_item_force(FrameMap::_a2_a3_long_opr);
 	// object pointer register is overwritten with field address
 	obj.load_item();
 	// generate compare-and-swap; produces zero condition if swap occurs
 	int value_offset = sun_misc_AtomicLongCSImpl::value_offset();
 	LIR_Opr addr = obj.result();
 	__ add(addr, LIR_OprFact::intConst(value_offset), addr);
 	LIR_Opr t1 = LIR_OprFact::illegalOpr;  // no temp needed
 	LIR_Opr t2 = LIR_OprFact::illegalOpr;  // no temp needed
 	__ cas_long(addr, cmp_value.result(), new_value.result(), t1, t2, FrameMap::_at_opr);
 	// generate conditional move of boolean result
 	LIR_Opr result = rlock_result(x);
 	//__ cmove(lir_cond_equal, LIR_OprFact::intConst(1), LIR_OprFact::intConst(0), result);
 	__ move(FrameMap::_at_opr, result);
 }
 */
 //FIXME, for mips, compareandswap is a bit different
 //I have no idea use which register
 void LIRGenerator::do_CompareAndSwap(Intrinsic* x, ValueType* type) {
 	assert(x->number_of_arguments() == 4, "wrong type");
 	LIRItem obj   (x->argument_at(0), this);  // object
 	LIRItem offset(x->argument_at(1), this);  // offset of field
 	LIRItem cmp   (x->argument_at(2), this);  // value to compare with field
 	LIRItem val   (x->argument_at(3), this);  // replace field with val if matches cmp
 	assert(obj.type()->tag() == objectTag, "invalid type");
 	//In 64bit the type can be long, sparc doesn't have this assert
 	//assert(offset.type()->tag() == intTag, "invalid type");
 	assert(cmp.type()->tag() == type->tag(), "invalid type");
 	assert(val.type()->tag() == type->tag(), "invalid type");
 	// get address of field
 	obj.load_item();
 	offset.load_nonconstant();
 	if (type == objectType) {
 		//  cmp.load_item_force(FrameMap::eax_oop_opr);
 		cmp.load_item_force(FrameMap::_a0_oop_opr);
 		val.load_item();
 	} else if (type == intType) {
 		// cmp.load_item_force(FrameMap::eax_opr);
 		cmp.load_item_force(FrameMap::_a0_opr);
 		val.load_item();
 	} else if (type == longType) {
 		//// cmp.load_item_force(FrameMap::eax_edx_long_opr);
 		cmp.load_item_force(FrameMap::_a0_a1_long_opr);
 		// val.load_item_force(FrameMap::ebx_ecx_long_opr);
 		val.load_item_force(FrameMap::_a2_a3_long_opr);
 	} else {
 		ShouldNotReachHere();
 	}
 	LIR_Opr addr = new_pointer_register();
 	__ move(obj.result(), addr);
 	__ add(addr, offset.result(), addr);
 	LIR_Opr ill = LIR_OprFact::illegalOpr;  // for convenience
 	if (type == objectType)
 		__ cas_obj(addr, cmp.result(), val.result(), ill, ill, FrameMap::_at_opr);
 	else if (type == intType)
 		__ cas_int(addr, cmp.result(), val.result(), ill, ill, FrameMap::_at_opr);
 	else if (type == longType)
 		__ cas_long(addr, cmp.result(), val.result(), ill, ill, FrameMap::_at_opr);
 	else {
 		ShouldNotReachHere();
 	}
 	// generate conditional move of boolean result
 	LIR_Opr result = rlock_result(x);
 	//cmove not exist on mips,
 	// __ cmove(lir_cond_equal, LIR_OprFact::intConst(1), LIR_OprFact::intConst(0), result);
 	// our implementation of cmpxchg put result in AT
 	//  LIR_Opr result = rlock_result_with_hint(x, hint());
 	__ move(FrameMap::_at_opr, result);
 	if (type == objectType)   // Write-barrier needed for Object fields.
 		write_barrier(addr);
 }
 void LIRGenerator::do_MathIntrinsic(Intrinsic* x) {
 	switch (x->id()) {
 		case vmIntrinsics::_dabs:
 		case vmIntrinsics::_dsqrt: {
 						   assert(x->number_of_arguments() == 1, "wrong type");
 						   LIRItem value(x->argument_at(0), this);
 						   value.load_item();
 						   LIR_Opr dst = rlock_result(x);
 						   switch (x->id()) {
 							   case vmIntrinsics::_dsqrt: {
 											      __ sqrt(value.result(), dst, LIR_OprFact::illegalOpr);
 											      break;
 										      }
 							   case vmIntrinsics::_dabs: {
 											     __ abs(value.result(), dst, LIR_OprFact::illegalOpr);
 											     break;
 										     }
 						   }
 						   break;
 					   }
 		case vmIntrinsics::_dlog10: // fall through
 		case vmIntrinsics::_dlog: // fall through
 		case vmIntrinsics::_dsin: // fall through
 		case vmIntrinsics::_dtan: // fall through
 		case vmIntrinsics::_dcos: {
 						  assert(x->number_of_arguments() == 1, "wrong type");
 						  address runtime_entry = NULL;
 						  switch (x->id()) {
 							  case vmIntrinsics::_dsin:
 								  runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dsin);
 								  break;
 							  case vmIntrinsics::_dcos:
 								  runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dcos);
 								  break;
 							  case vmIntrinsics::_dtan:
 								  runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dtan);
 								  break;
 							  case vmIntrinsics::_dlog:
 								  runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dlog);
 								  break;
 							  case vmIntrinsics::_dlog10:
 								  runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dlog10);
 								  break;
 							  default:
 								  ShouldNotReachHere();
 						  }
 						  LIR_Opr result = call_runtime(x->argument_at(0), runtime_entry, x->type(), NULL);
 						  set_result(x, result);
 					  }
 	}
 }
 void LIRGenerator::do_ArrayCopy(Intrinsic* x) {
 	assert(x->number_of_arguments() == 5, "wrong type");
 	// Note: spill caller save before setting the item
 	LIRItem src     (x->argument_at(0), this);
 	LIRItem src_pos (x->argument_at(1), this);
 	LIRItem dst     (x->argument_at(2), this);
 	LIRItem dst_pos (x->argument_at(3), this);
 	LIRItem length  (x->argument_at(4), this);
 	// load all values in callee_save_registers, as this makes the
 	// parameter passing to the fast case simpler
 	src.load_item_force     (FrameMap::_t0_oop_opr);
 	src_pos.load_item_force (FrameMap::_a0_opr);
 	dst.load_item_force     (FrameMap::_a1_oop_opr);
 	dst_pos.load_item_force (FrameMap::_a2_opr);
 	length.load_item_force  (FrameMap::_a3_opr);
 	int flags;
 	ciArrayKlass* expected_type;
 	arraycopy_helper(x, &flags, &expected_type);
 	CodeEmitInfo* info = state_for(x, x->state());
 	__ arraycopy(src.result(), src_pos.result(), dst.result(), dst_pos.result(),
 			length.result(), rlock_callee_saved(T_INT),
 			expected_type, flags, info);
 	set_no_result(x);
 }
 void LIRGenerator::do_update_CRC32(Intrinsic* x) {    // Fu: 20130832
 tty->print_cr("LIRGenerator::do_update_CRC32 unimplemented yet !");
 Unimplemented();
 }
 // _i2l, _i2f, _i2d, _l2i, _l2f, _l2d, _f2i, _f2l, _f2d, _d2i, _d2l, _d2f
 // _i2b, _i2c, _i2s
 LIR_Opr fixed_register_for(BasicType type) {
 	switch (type) {
 		case T_FLOAT:  return FrameMap::_f0_float_opr;
 		case T_DOUBLE: return FrameMap::_d0_double_opr;
 		case T_INT:    return FrameMap::_v0_opr;
 		case T_LONG:   return FrameMap::_v0_v1_long_opr;
 		default:       ShouldNotReachHere(); return LIR_OprFact::illegalOpr;
 	}
 }
 void LIRGenerator::do_Convert(Convert* x) {
 	// flags that vary for the different operations and different SSE-settings
 	bool fixed_input, fixed_result, round_result, needs_stub;
 	switch (x->op()) {
 		case Bytecodes::_i2l: // fall through
 		case Bytecodes::_l2i: // fall through
 		case Bytecodes::_i2b: // fall through
 		case Bytecodes::_i2c: // fall through
 		case Bytecodes::_i2s:
 			fixed_input  = false;
 			fixed_result = false;
 			round_result = false;
 			needs_stub   = false; break;
 		case Bytecodes::_f2d:
 			fixed_input  = UseSSE == 1;
 			fixed_result = false;
 			round_result = false;
 			needs_stub   = false; break;
 		case Bytecodes::_d2f:
 			fixed_input  = false;
 			fixed_result = UseSSE == 1;
 			round_result = UseSSE < 1;
 			needs_stub   = false; break;
 		case Bytecodes::_i2f:
 			fixed_input  = false;
 			fixed_result = false;
 			round_result = UseSSE < 1;
 			needs_stub   = false; break;
 		case Bytecodes::_i2d:
 			fixed_input  = false;
 			fixed_result = false;
 			round_result = false;
 			needs_stub   = false; break;
 		case Bytecodes::_f2i:
 			fixed_input  = false;
 			fixed_result = false;
 			round_result = false;
 			needs_stub   = true;  break;
 		case Bytecodes::_d2i:
 			fixed_input  = false;
 			fixed_result = false;
 			round_result = false;
 			needs_stub   = true;  break;
 		case Bytecodes::_l2f:
 			fixed_input  = false;
 			fixed_result = UseSSE >= 1;
 			round_result = UseSSE < 1;
 			needs_stub   = false; break;
 		case Bytecodes::_l2d:
 			fixed_input  = false;
 			fixed_result = UseSSE >= 2;
 			round_result = UseSSE < 2;
 			needs_stub   = false; break;
 		case Bytecodes::_f2l:
 			fixed_input  = true;
 			fixed_result = true;
 			round_result = false;
 			needs_stub   = false; break;
 		case Bytecodes::_d2l:
 			fixed_input  = true;
 			fixed_result = true;
 			round_result = false;
 			needs_stub   = false; break;
 		default: ShouldNotReachHere();
 	}
 	LIRItem value(x->value(), this);
 	value.load_item();
 	LIR_Opr input = value.result();
 	LIR_Opr result = rlock(x);
 	// arguments of lir_convert
 	LIR_Opr conv_input = input;
 	LIR_Opr conv_result = result;
 	ConversionStub* stub = NULL;
 	if (fixed_input) {
 		conv_input = fixed_register_for(input->type());
 		__ move(input, conv_input);
 	}
 	assert(fixed_result == false || round_result == false, "cannot set both");
 	if (fixed_result) {
 		conv_result = fixed_register_for(result->type());
 	} else if (round_result) {
 		result = new_register(result->type());
 		set_vreg_flag(result, must_start_in_memory);
 	}
 	if (needs_stub) {
 		stub = new ConversionStub(x->op(), conv_input, conv_result);
 	}
 	__ convert(x->op(), conv_input, conv_result, stub);
 	if (result != conv_result) {
 		__ move(conv_result, result);
 	}
 	assert(result->is_virtual(), "result must be virtual register");
 	set_result(x, result);
 }
 void LIRGenerator::do_NewInstance(NewInstance* x) {
 	const LIR_Opr reg = result_register_for(x->type());
 #ifndef PRODUCT
 	if (PrintNotLoaded && !x->klass()->is_loaded()) {
 		tty->print_cr("   ###class not loaded at new bci %d", x->printable_bci());
 	}
 #endif
 	CodeEmitInfo* info = state_for(x, x->state());
 //	LIR_Opr tmp1 = new_register(T_INT);
 //	LIR_Opr tmp2 = new_register(T_INT);
 //	LIR_Opr tmp3 = new_register(T_INT);
 //	LIR_Opr tmp4 = new_register(T_INT);
 #ifndef _LP64
 	LIR_Opr klass_reg = FrameMap::_t4_oop_opr;
 #else
 	LIR_Opr klass_reg = FrameMap::_a4_oop_opr;
 #endif
 //	new_instance(reg, x->klass(), FrameMap::_t0_oop_opr, FrameMap::_t1_oop_opr,FrameMap::_t2_oop_opr, LIR_OprFact::illegalOpr, klass_reg, info);
 	new_instance(reg,
 		x->klass(),
 		FrameMap::_t0_oop_opr,
 		FrameMap::_t1_oop_opr,
 		FrameMap::_t2_oop_opr,
 		FrameMap::_t3_oop_opr,
 #ifndef _LP64
 		FrameMap::_t5_oop_opr,
 		FrameMap::_t6_oop_opr,
 #else
 		FrameMap::_a5_oop_opr,
 		FrameMap::_a6_oop_opr,
 #endif
 		klass_reg,
 		info);
 	LIR_Opr result = rlock_result(x);
 	__ move(reg, result);
 }
 void LIRGenerator::do_NewTypeArray(NewTypeArray* x) {
 	CodeEmitInfo* info = state_for(x, x->state());
 	LIRItem length(x->length(), this);
 	length.load_item_force(FrameMap::_t2_opr);
 	LIR_Opr reg = result_register_for(x->type());
 	//LIR_Opr tmp1 = new_register(T_INT);
 	//LIR_Opr tmp2 = new_register(T_INT);
 	//LIR_Opr tmp3 = new_register(T_INT);
 	//LIR_Opr tmp4 = new_register(T_INT);
 	LIR_Opr tmp1 = FrameMap::_t0_oop_opr;
 	LIR_Opr tmp2 = FrameMap::_t1_oop_opr;
 	LIR_Opr tmp3 = FrameMap::_t3_oop_opr;
 #ifndef _LP64
 	LIR_Opr tmp4 = FrameMap::_t5_oop_opr;
 	LIR_Opr tmp5 = FrameMap::_t6_oop_opr;
 	LIR_Opr klass_reg = FrameMap::_t4_oop_opr;
 #else
 	LIR_Opr tmp4 = FrameMap::_a5_oop_opr;
 	LIR_Opr tmp5 = FrameMap::_a6_oop_opr;
 	LIR_Opr klass_reg = FrameMap::_a4_oop_opr;
 #endif
 	LIR_Opr len = length.result();
 	BasicType elem_type = x->elt_type();
 	__ metadata2reg(ciTypeArrayKlass::make(elem_type)->constant_encoding(), klass_reg);
 	CodeStub* slow_path = new NewTypeArrayStub(klass_reg, len, reg, info);
 	__ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4,tmp5, elem_type, klass_reg, slow_path);
 	LIR_Opr result = rlock_result(x);
 	__ move(reg, result);
 }
 void LIRGenerator::do_NewObjectArray(NewObjectArray* x) {
 	LIRItem length(x->length(), this);
 	// in case of patching (i.e., object class is not yet loaded), we
 	// need to reexecute the instruction
 	// and therefore provide the state before the parameters have been consumed
 	CodeEmitInfo* patching_info = NULL;
 	if (!x->klass()->is_loaded() || PatchALot) {
 		patching_info = state_for(x, x->state_before());
 	}
 	const LIR_Opr reg = result_register_for(x->type());
 	//LIR_Opr tmp1 = new_register(T_INT);
 	//LIR_Opr tmp2 = new_register(T_INT);
 	//LIR_Opr tmp3 = new_register(T_INT);
 	//LIR_Opr tmp4 = new_register(T_INT);
 	LIR_Opr tmp1 = FrameMap::_t0_oop_opr;
 	LIR_Opr tmp2 = FrameMap::_t1_oop_opr;
 	LIR_Opr tmp3 = FrameMap::_t3_oop_opr;
 #ifndef _LP64
 	LIR_Opr tmp4 = FrameMap::_t5_oop_opr;
 	LIR_Opr tmp5 = FrameMap::_t6_oop_opr;
 	LIR_Opr klass_reg = FrameMap::_t4_oop_opr;
 #else
 	LIR_Opr tmp4 = FrameMap::_a5_oop_opr;
 	LIR_Opr tmp5 = FrameMap::_a6_oop_opr;
 	LIR_Opr klass_reg = FrameMap::_a4_oop_opr;
 #endif
 	length.load_item_force(FrameMap::_t2_opr);
 	LIR_Opr len = length.result();
 	CodeEmitInfo* info = state_for(x, x->state());
 	CodeStub* slow_path = new NewObjectArrayStub(klass_reg, len, reg, info);
 	ciKlass* obj = (ciKlass*) ciObjArrayKlass::make(x->klass());
 	if (obj == ciEnv::unloaded_ciobjarrayklass()) {
 		BAILOUT("encountered unloaded_ciobjarrayklass due to out of memory error");
 	}
 	klass2reg_with_patching(klass_reg, obj, patching_info);
 	__ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4, tmp5, T_OBJECT, klass_reg, slow_path);
 	LIR_Opr result = rlock_result(x);
 	__ move(reg, result);
 }
 void LIRGenerator::do_NewMultiArray(NewMultiArray* x) {
 	Values* dims = x->dims();
 	int i = dims->length();
 	LIRItemList* items = new LIRItemList(dims->length(), NULL);
 	while (i-- > 0) {
 		LIRItem* size = new LIRItem(dims->at(i), this);
 		items->at_put(i, size);
 	}
 	// need to get the info before, as the items may become invalid through item_free
 	CodeEmitInfo* patching_info = NULL;
 	if (!x->klass()->is_loaded() || PatchALot) {
 		patching_info = state_for(x, x->state_before());
 		// cannot re-use same xhandlers for multiple CodeEmitInfos, so
 		// clone all handlers.
 		x->set_exception_handlers(new XHandlers(x->exception_handlers()));
 	}
 	CodeEmitInfo* info = state_for(x, x->state());
 	i = dims->length();
 	while (i-- > 0) {
 		LIRItem* size = items->at(i);
 		size->load_nonconstant();
 		store_stack_parameter(size->result(), in_ByteSize(i*4));
 	}
 	LIR_Opr reg = result_register_for(x->type());
 	klass2reg_with_patching(reg, x->klass(), patching_info);
 	//  LIR_Opr rank = FrameMap::ebx_opr;
 	LIR_Opr rank = FrameMap::_t2_opr;
 	__ move(LIR_OprFact::intConst(x->rank()), rank);
 	//  LIR_Opr varargs = FrameMap::ecx_opr;
 	LIR_Opr varargs = FrameMap::_t0_opr;
 	__ move(FrameMap::_sp_opr, varargs);
 	LIR_OprList* args = new LIR_OprList(3);
 	args->append(reg);
 	args->append(rank);
 	args->append(varargs);
 	__ call_runtime(Runtime1::entry_for(Runtime1::new_multi_array_id),
 			LIR_OprFact::illegalOpr,
 			reg, args, info);
 	LIR_Opr result = rlock_result(x);
 	__ move(reg, result);
 }
 void LIRGenerator::do_BlockBegin(BlockBegin* x) {
   // nothing to do for now
 }
 void LIRGenerator::do_CheckCast(CheckCast* x) {
 	LIRItem obj(x->obj(), this);
 	CodeEmitInfo* patching_info = NULL;
 	if (!x->klass()->is_loaded() || (PatchALot && !x->is_incompatible_class_change_check())) {
 		// must do this before locking the destination register as an oop register,
 		// and before the obj is loaded (the latter is for deoptimization)
 		patching_info = state_for(x, x->state_before());
 	}
 	obj.load_item();
 	// info for exceptions
 	CodeEmitInfo* info_for_exception = state_for(x);
 	CodeStub* stub;
 	if (x->is_incompatible_class_change_check()) {
 		assert(patching_info == NULL, "can't patch this");
 		stub = new SimpleExceptionStub(Runtime1::throw_incompatible_class_change_error_id, LIR_OprFact::illegalOpr, info_for_exception);
 	} else {
 		stub = new SimpleExceptionStub(Runtime1::throw_class_cast_exception_id, obj.result(), info_for_exception);
 	}
 	LIR_Opr reg = rlock_result(x);
 	LIR_Opr tmp3 = LIR_OprFact::illegalOpr;
 	if (!x->klass()->is_loaded() || UseCompressedOops) {
 	    tmp3 = new_register(objectType);
 	}
 	__ checkcast(reg, obj.result(), x->klass(),
 			new_register(objectType), new_register(objectType),
 			tmp3, x->direct_compare(), info_for_exception, patching_info, stub,
 			x->profiled_method(), x->profiled_bci());
 }
 void LIRGenerator::do_InstanceOf(InstanceOf* x) {
 	LIRItem obj(x->obj(), this);
 	// result and test object may not be in same register
 	LIR_Opr reg = rlock_result(x);
 	CodeEmitInfo* patching_info = NULL;
 	if ((!x->klass()->is_loaded() || PatchALot)) {
 		// must do this before locking the destination register as an oop register
 		patching_info = state_for(x, x->state_before());
 	}
 	obj.load_item();
 	LIR_Opr tmp = new_register(objectType);
 	LIR_Opr tmp3 = LIR_OprFact::illegalOpr;
 	if (!x->klass()->is_loaded() || UseCompressedOops) {
 	    tmp3 = new_register(objectType);
 	}
 	__ instanceof(reg, obj.result(), x->klass(),
 			tmp, new_register(objectType), tmp3,
 			x->direct_compare(), patching_info, x->profiled_method(), x->profiled_bci());
 }
 void LIRGenerator::do_If(If* x) {
 	assert(x->number_of_sux() == 2, "inconsistency");
 	ValueTag tag = x->x()->type()->tag();
 	bool is_safepoint = x->is_safepoint();
 	If::Condition cond = x->cond();
 	LIRItem xitem(x->x(), this);
 	LIRItem yitem(x->y(), this);
 	LIRItem* xin = &xitem;
 	LIRItem* yin = &yitem;
 	if (tag == longTag) {
 		// for longs, only conditions "eql", "neq", "lss", "geq" are valid;
 		// mirror for other conditions
 		if (cond == If::gtr || cond == If::leq) {
 			cond = Instruction::mirror(cond);
 			xin = &yitem;
 			yin = &xitem;
 		}
 		xin->set_destroys_register();
 	}
 	xin->load_item();
 	if (tag == longTag && yin->is_constant() && yin->get_jlong_constant() == 0 && (cond == If::eql || cond == If::neq)) {
 		// inline long zero
 		yin->dont_load_item();
 	} else if (tag == longTag || tag == floatTag || tag == doubleTag) {
 		// longs cannot handle constants at right side
 		yin->load_item();
 	} else {
 		yin->dont_load_item();
 	}
 	// add safepoint before generating condition code so it can be recomputed
 	if (x->is_safepoint()) {
 		// increment backedge counter if needed
 		increment_backedge_counter(state_for(x, x->state_before()), x->profiled_bci());
 		__ safepoint(safepoint_poll_register(), state_for(x, x->state_before()));
 	}
 	set_no_result(x);
 	LIR_Opr left = xin->result();
 	LIR_Opr right = yin->result();
 	//  __ cmp(lir_cond(cond), left, right);
 	profile_branch(x, cond, left, right);
 	move_to_phi(x->state());
 	if (x->x()->type()->is_float_kind()) {
 		__ branch(lir_cond(cond), left, right, right->type(), x->tsux(), x->usux());
 	} else {
 		__ branch(lir_cond(cond), left, right, right->type(), x->tsux());
 	}
 	assert(x->default_sux() == x->fsux(), "wrong destination above");
 	__ jump(x->default_sux());
 }
 LIR_Opr LIRGenerator::getThreadPointer() {
 #ifdef _LP64
 //FIXME, does as_pointer need to be implemented? or 64bit can use one register. by aoqi
 	//return FrameMap::as_pointer_opr(r15_thread);
 	LIR_Opr result = new_register(T_LONG);
 	__ get_thread(result);
 	return result;
 #else
 	LIR_Opr result = new_register(T_INT);
 	__ get_thread(result);
 	return result;
 #endif //
 }
 void LIRGenerator::trace_block_entry(BlockBegin* block) {
 	store_stack_parameter(LIR_OprFact::intConst(block->block_id()), in_ByteSize(0));
 	LIR_OprList* args = new LIR_OprList();
 	address func = CAST_FROM_FN_PTR(address, Runtime1::trace_block_entry);
 	__ call_runtime_leaf(func, LIR_OprFact::illegalOpr, LIR_OprFact::illegalOpr, args);
 }
 void LIRGenerator::volatile_field_store(LIR_Opr value, LIR_Address* address,
 		CodeEmitInfo* info) {
 	if (address->type() == T_LONG) {
 		__ volatile_store_mem_reg(value, address, info);
 	} else {
 		__ store(value, address, info);
 	}
 }
 void LIRGenerator::volatile_field_load(LIR_Address* address, LIR_Opr result,
 			CodeEmitInfo* info) {
 	if (address->type() == T_LONG) {
 		__ volatile_load_mem_reg(address, result, info);
 	} else {
 		__ load(address, result, info);
 	}
 }
 void LIRGenerator::get_Object_unsafe(LIR_Opr dst, LIR_Opr src, LIR_Opr offset,
 		BasicType type, bool is_volatile) {
 	__ add(src, offset, FrameMap::_at_opr);
 	if (is_volatile && type == T_LONG) {
 		LIR_Address* addr = new LIR_Address(FrameMap::_at_opr, 0, T_DOUBLE);
 		LIR_Opr tmp = new_register(T_DOUBLE);
 		__ load(addr, tmp);
 		LIR_Opr spill = new_register(T_LONG);
 		set_vreg_flag(spill, must_start_in_memory);
 		__ move(tmp, spill);
 		__ move(spill, dst);
 	} else {
 		LIR_Address* addr = new LIR_Address(FrameMap::_at_opr, 0, type);
 		__ load(addr, dst);
 	}
 }
 void LIRGenerator::put_Object_unsafe(LIR_Opr src, LIR_Opr offset, LIR_Opr data,
 		BasicType type, bool is_volatile) {
 	__ add(src, offset, FrameMap::_at_opr);
 	if (is_volatile && type == T_LONG) {
 		LIR_Address* addr = new LIR_Address(FrameMap::_at_opr, 0, T_DOUBLE);
 		LIR_Opr tmp = new_register(T_DOUBLE);
 		LIR_Opr spill = new_register(T_DOUBLE);
 		set_vreg_flag(spill, must_start_in_memory);
 		__ move(data, spill);
 		__ move(spill, tmp);
 		__ move(tmp, addr);
 	} else {
 		LIR_Address* addr = new LIR_Address(FrameMap::_at_opr, 0, type);
 		bool is_obj = (type == T_ARRAY || type == T_OBJECT);
 		if (is_obj) {
 			// Do the pre-write barrier, if any.
 			pre_barrier(LIR_OprFact::address(addr), LIR_OprFact::illegalOpr/* pre_val */,
                                     true/* do_load */,false /*patch*/, NULL);
 			__ move(data, addr);
 			assert(src->is_register(), "must be register");
 			// Seems to be a precise address
 			post_barrier(LIR_OprFact::address(addr), data);
 		} else {
 			__ move(data, addr);
 		}
 	}
 }
 void LIRGenerator::do_UnsafeGetAndSetObject(UnsafeGetAndSetObject* x) {
   BasicType type = x->basic_type();
   LIRItem src(x->object(), this);
   LIRItem off(x->offset(), this);
   LIRItem value(x->value(), this);
   src.load_item();
   value.load_item();
   off.load_nonconstant();
   LIR_Opr dst = rlock_result(x, type);
   LIR_Opr data = value.result();
   bool is_obj = (type == T_ARRAY || type == T_OBJECT);
   LIR_Opr offset = off.result();
   assert (type == T_INT || (!x->is_add() && is_obj) LP64_ONLY( || type == T_LONG ), "unexpected type");
   LIR_Address* addr;
   if (offset->is_constant()) {
 #ifdef _LP64
     jlong c = offset->as_jlong();
     if ((jlong)((jint)c) == c) {
       addr = new LIR_Address(src.result(), (jint)c, type);
     } else {
       LIR_Opr tmp = new_register(T_LONG);
       __ move(offset, tmp);
       addr = new LIR_Address(src.result(), tmp, type);
     }
 #else
     addr = new LIR_Address(src.result(), offset->as_jint(), type);
 #endif
   } else {
     addr = new LIR_Address(src.result(), offset, type);
   }
   if (data != dst) {
     __ move(data, dst);
     data = dst;
   }
   if (x->is_add()) {
     __ xadd(LIR_OprFact::address(addr), data, dst, LIR_OprFact::illegalOpr);
   } else {
     if (is_obj) {
       // Do the pre-write barrier, if any.
             pre_barrier(LIR_OprFact::address(addr), LIR_OprFact::illegalOpr /* pre_val */,
                   true /* do_load */, false /* patch */, NULL);
     }
     __ xchg(LIR_OprFact::address(addr), data, dst, LIR_OprFact::illegalOpr);
     if (is_obj) {
       // Seems to be a precise address
             post_barrier(LIR_OprFact::address(addr), data);
     }
   }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/mips/vm/c1_LIRGenerator_mips.cpp@d885f8d65c58 (annotated)

src/cpu/mips/vm/c1_LIRGenerator_mips.cpp