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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

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 *

 * 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.

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#ifndef SHARE_VM_OPTO_DIVNODE_HPP

#define SHARE_VM_OPTO_DIVNODE_HPP

#include "opto/multnode.hpp"

#include "opto/node.hpp"

#include "opto/opcodes.hpp"

#include "opto/type.hpp"

// Portions of code courtesy of Clifford Click

// Optimization - Graph Style

//------------------------------DivINode---------------------------------------

// Integer division

// Note: this is division as defined by JVMS, i.e., MinInt/-1 == MinInt.

// On processors which don't naturally support this special case (e.g., x86),

// the matcher or runtime system must take care of this.

class DivINode : public Node {

public:

  DivINode( Node *c, Node *dividend, Node *divisor ) : Node(c, dividend, divisor ) {}

  virtual int Opcode() const;

  virtual Node *Identity( PhaseTransform *phase );

  virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);

  virtual const Type *Value( PhaseTransform *phase ) const;

  virtual const Type *bottom_type() const { return TypeInt::INT; }

  virtual uint ideal_reg() const { return Op_RegI; }

};

//------------------------------DivLNode---------------------------------------

// Long division

class DivLNode : public Node {

public:

  DivLNode( Node *c, Node *dividend, Node *divisor ) : Node(c, dividend, divisor ) {}

  virtual int Opcode() const;

  virtual Node *Identity( PhaseTransform *phase );

  virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);

  virtual const Type *Value( PhaseTransform *phase ) const;

  virtual const Type *bottom_type() const { return TypeLong::LONG; }

  virtual uint ideal_reg() const { return Op_RegL; }

};

//------------------------------DivFNode---------------------------------------

// Float division

class DivFNode : public Node {

public:

  DivFNode( Node *c, Node *dividend, Node *divisor ) : Node(c, dividend, divisor) {}

  virtual int Opcode() const;

  virtual Node *Identity( PhaseTransform *phase );

  virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);

  virtual const Type *Value( PhaseTransform *phase ) const;

  virtual const Type *bottom_type() const { return Type::FLOAT; }

  virtual uint ideal_reg() const { return Op_RegF; }

};

//------------------------------DivDNode---------------------------------------

// Double division

class DivDNode : public Node {

public:

  DivDNode( Node *c, Node *dividend, Node *divisor ) : Node(c,dividend, divisor) {}

  virtual int Opcode() const;

  virtual Node *Identity( PhaseTransform *phase );

  virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);

  virtual const Type *Value( PhaseTransform *phase ) const;

  virtual const Type *bottom_type() const { return Type::DOUBLE; }

  virtual uint ideal_reg() const { return Op_RegD; }

};

//------------------------------ModINode---------------------------------------

// Integer modulus

class ModINode : public Node {

public:

  ModINode( Node *c, Node *in1, Node *in2 ) : Node(c,in1, in2) {}

  virtual int Opcode() const;

  virtual const Type *Value( PhaseTransform *phase ) const;

  virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);

  virtual const Type *bottom_type() const { return TypeInt::INT; }

  virtual uint ideal_reg() const { return Op_RegI; }

};

//------------------------------ModLNode---------------------------------------

// Long modulus

class ModLNode : public Node {

public:

  ModLNode( Node *c, Node *in1, Node *in2 ) : Node(c,in1, in2) {}

  virtual int Opcode() const;

  virtual const Type *Value( PhaseTransform *phase ) const;

  virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);

  virtual const Type *bottom_type() const { return TypeLong::LONG; }

  virtual uint ideal_reg() const { return Op_RegL; }

};

//------------------------------ModFNode---------------------------------------

// Float Modulus

class ModFNode : public Node {

public:

  ModFNode( Node *c, Node *in1, Node *in2 ) : Node(c,in1, in2) {}

  virtual int Opcode() const;

  virtual const Type *Value( PhaseTransform *phase ) const;

  virtual const Type *bottom_type() const { return Type::FLOAT; }

  virtual uint ideal_reg() const { return Op_RegF; }

};

//------------------------------ModDNode---------------------------------------

// Double Modulus

class ModDNode : public Node {

public:

  ModDNode( Node *c, Node *in1, Node *in2 ) : Node(c, in1, in2) {}

  virtual int Opcode() const;

  virtual const Type *Value( PhaseTransform *phase ) const;

  virtual const Type *bottom_type() const { return Type::DOUBLE; }

  virtual uint ideal_reg() const { return Op_RegD; }

};

//------------------------------DivModNode---------------------------------------

// Division with remainder result.

class DivModNode : public MultiNode {

protected:

  DivModNode( Node *c, Node *dividend, Node *divisor );

public:

  enum {

    div_proj_num =  0,      // quotient

    mod_proj_num =  1       // remainder

  };

  virtual int Opcode() const;

  virtual Node *Identity( PhaseTransform *phase ) { return this; }

  virtual Node *Ideal(PhaseGVN *phase, bool can_reshape) { return NULL; }

  virtual const Type *Value( PhaseTransform *phase ) const { return bottom_type(); }

  virtual uint hash() const { return Node::hash(); }

  virtual bool is_CFG() const  { return false; }

  virtual uint ideal_reg() const { return NotAMachineReg; }

  ProjNode* div_proj() { return proj_out(div_proj_num); }

  ProjNode* mod_proj() { return proj_out(mod_proj_num); }

};

//------------------------------DivModINode---------------------------------------

// Integer division with remainder result.

class DivModINode : public DivModNode {

public:

  DivModINode( Node *c, Node *dividend, Node *divisor ) : DivModNode(c, dividend, divisor) {}

  virtual int Opcode() const;

  virtual const Type *bottom_type() const { return TypeTuple::INT_PAIR; }

  virtual Node *match( const ProjNode *proj, const Matcher *m );

  // Make a divmod and associated projections from a div or mod.

  static DivModINode* make(Compile* C, Node* div_or_mod);

};

//------------------------------DivModLNode---------------------------------------

// Long division with remainder result.

class DivModLNode : public DivModNode {

public:

  DivModLNode( Node *c, Node *dividend, Node *divisor ) : DivModNode(c, dividend, divisor) {}

  virtual int Opcode() const;

  virtual const Type *bottom_type() const { return TypeTuple::LONG_PAIR; }

  virtual Node *match( const ProjNode *proj, const Matcher *m );

  // Make a divmod and associated projections from a div or mod.

  static DivModLNode* make(Compile* C, Node* div_or_mod);

};

#endif // SHARE_VM_OPTO_DIVNODE_HPP