CompareAnalyser.hpp

/*******************************************************************************
 * Copyright IBM Corp. and others 2000
 *
 * This program and the accompanying materials are made available under
 * the terms of the Eclipse Public License 2.0 which accompanies this
 * distribution and is available at https://www.eclipse.org/legal/epl-2.0/
 * or the Apache License, Version 2.0 which accompanies this distribution
 * and is available at https://www.apache.org/licenses/LICENSE-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License, v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception [1] and GNU General Public
 * License, version 2 with the OpenJDK Assembly Exception [2].
 *
 * [1] https://www.gnu.org/software/classpath/license.html
 * [2] https://openjdk.org/legal/assembly-exception.html
 *
 * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0-only WITH Classpath-exception-2.0 OR GPL-2.0-only WITH OpenJDK-assembly-exception-1.0
 *******************************************************************************/

#ifndef S390COMPAREANALYSER_INCL
#define S390COMPAREANALYSER_INCL

#include <stdint.h>
#include "codegen/Analyser.hpp"
#include "codegen/CodeGenerator.hpp"
#include "codegen/InstOpCode.hpp"

namespace TR { class LabelSymbol; }
namespace TR { class Machine; }
namespace TR { class Node; }
namespace TR { class Register; }
namespace TR { class RegisterDependencyConditions; }

#define EvalChild1   0x01
#define EvalChild2   0x02
#define CmpReg1Reg2  0x04
#define CmpReg1Mem2  0x08
#define CmpMem1Reg2  0x10

class TR_S390CompareAnalyser : public TR_Analyser
   {

   static const uint8_t _actionMap[NUM_ACTIONS];
   TR::CodeGenerator    *_cg;
   TR::Machine *_machine;

   public:

   TR_S390CompareAnalyser(TR::CodeGenerator *cg)
      : _cg(cg), _machine(cg->machine())
      {}

   void integerCompareAnalyser(TR::Node       *root,
                               TR::InstOpCode::Mnemonic regRegOpCode,
                               TR::InstOpCode::Mnemonic regMemOpCode,
                               TR::InstOpCode::Mnemonic memRegOpCode);

   TR::RegisterDependencyConditions*
        longOrderedCompareAndBranchAnalyser(TR::Node       *root,
                                            TR::InstOpCode::Mnemonic branchOpCode,
                                            TR::InstOpCode::S390BranchCondition lowBranchCond,
                                            TR::InstOpCode::S390BranchCondition highBranchCond,
                                            TR::InstOpCode::S390BranchCondition highReversedBranchCond,
					    TR::LabelSymbol *trueLabel,
					    TR::LabelSymbol *falseLabel,
                                            bool &internalControlFlowStarted);

   void longEqualityCompareAndBranchAnalyser(TR::Node        *root,
                                             TR::LabelSymbol *firstBranchLabel,
                                             TR::LabelSymbol *secondBranchLabel,
                                             TR::InstOpCode::Mnemonic  secondBranchOp);

   TR::Register *longEqualityBooleanAnalyser(TR::Node       *root,
                                            TR::InstOpCode::Mnemonic setOpCode,
                                            TR::InstOpCode::Mnemonic combineOpCode);

   TR::Register *longOrderedBooleanAnalyser(TR::Node       *root,
                                           TR::InstOpCode::Mnemonic highSetOpCode,
                                           TR::InstOpCode::Mnemonic lowSetOpCode);

   TR::Register *longCMPAnalyser(TR::Node *root);


   bool getEvalChild1()  {return (_actionMap[getInputs()] & EvalChild1)  ? true : false;}
   bool getEvalChild2()  {return (_actionMap[getInputs()] & EvalChild2)  ? true : false;}
   bool getCmpReg1Reg2() {return (_actionMap[getInputs()] & CmpReg1Reg2) ? true : false;}
   bool getCmpReg1Mem2() {return (_actionMap[getInputs()] & CmpReg1Mem2) ? true : false;}
   bool getCmpMem1Reg2() {return (_actionMap[getInputs()] & CmpMem1Reg2) ? true : false;}

   };

#endif