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 /*

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

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  * 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.

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  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 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