SubtractAnalyser.hpp

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 * the terms of the Eclipse Public License 2.0 which accompanies this
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 * Licenses when the conditions for such availability set forth in the
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#ifndef IA32SUBTRACTANALYSER_INCL
#define IA32SUBTRACTANALYSER_INCL

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

namespace TR { class CodeGenerator; }
namespace TR { class Node; }

#define EvalChild1   0x01
#define EvalChild2   0x02
#define CopyReg1     0x04
#define SubReg1Reg2  0x08
#define SubReg3Reg2  0x10
#define SubReg1Mem2  0x20
#define SubReg3Mem2  0x40

class TR_X86SubtractAnalyser  : public TR_Analyser
   {

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

   public:

   TR_X86SubtractAnalyser(TR::CodeGenerator *cg)
      : _cg(cg)
      {}

   void integerSubtractAnalyser(TR::Node      *root,
                                TR::InstOpCode::Mnemonic regRegOpCode,
                                TR::InstOpCode::Mnemonic regMemOpCode,
                                TR::InstOpCode::Mnemonic copyOpCode,
                                bool needsEflags = false,
                                TR::Node *borrow = 0);

   void integerSubtractAnalyserWithExplicitOperands(TR::Node      *root,
                                                    TR::Node      *firstChild,
                                                    TR::Node      *secondChild,
                                                    TR::InstOpCode::Mnemonic regRegOpCode,
                                                    TR::InstOpCode::Mnemonic regMemOpCode,
                                                    TR::InstOpCode::Mnemonic copyOpCode,
                                                    bool needsEflags = false,
                                                    TR::Node *borrow = 0);

   TR::Register *integerSubtractAnalyserImpl(TR::Node      *root,
                                         TR::Node      *firstChild,
                                         TR::Node      *secondChild,
                                         TR::InstOpCode::Mnemonic regRegOpCode,
                                         TR::InstOpCode::Mnemonic regMemOpCode,
                                         TR::InstOpCode::Mnemonic copyOpCode,
                                         bool needsEflags,
                                         TR::Node *borrow);

   void longSubtractAnalyser(TR::Node *root);
   void longSubtractAnalyserWithExplicitOperands(TR::Node *root, TR::Node *firstChild, TR::Node *secondChild);
   TR::Register* longSubtractAnalyserImpl(TR::Node *root, TR::Node *&firstChild, TR::Node *&secondChild);

   bool getEvalChild1()  {return (_actionMap[getInputs()] & EvalChild1)  ? true : false;}
   bool getEvalChild2()  {return (_actionMap[getInputs()] & EvalChild2)  ? true : false;}
   bool getCopyReg1()    {return (_actionMap[getInputs()] & CopyReg1)    ? true : false;}
   bool getSubReg1Reg2() {return (_actionMap[getInputs()] & SubReg1Reg2) ? true : false;}
   bool getSubReg3Reg2() {return (_actionMap[getInputs()] & SubReg3Reg2) ? true : false;}
   bool getSubReg1Mem2() {return (_actionMap[getInputs()] & SubReg1Mem2) ? true : false;}
   bool getSubReg3Mem2() {return (_actionMap[getInputs()] & SubReg3Mem2) ? true : false;}

   bool isVolatileMemoryOperand(TR::Node *node);
   };

#endif