hotspot/src/share/vm/opto/mulnode.hpp
author kvn
Wed, 27 Jul 2011 17:28:36 -0700
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7069452: Cleanup NodeFlags Summary: Remove flags which duplicate information in Node::NodeClasses. Reviewed-by: never
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/*
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 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#ifndef SHARE_VM_OPTO_MULNODE_HPP
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#define SHARE_VM_OPTO_MULNODE_HPP
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#include "opto/node.hpp"
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#include "opto/opcodes.hpp"
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#include "opto/type.hpp"
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// Portions of code courtesy of Clifford Click
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class PhaseTransform;
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//------------------------------MulNode----------------------------------------
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// Classic MULTIPLY functionality.  This covers all the usual 'multiply'
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// behaviors for an algebraic ring.  Multiply-integer, multiply-float,
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// multiply-double, and binary-and are all inherited from this class.  The
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// various identity values are supplied by virtual functions.
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class MulNode : public Node {
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  virtual uint hash() const;
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public:
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  MulNode( Node *in1, Node *in2 ): Node(0,in1,in2) {}
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  // Handle algebraic identities here.  If we have an identity, return the Node
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  // we are equivalent to.  We look for "add of zero" as an identity.
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  virtual Node *Identity( PhaseTransform *phase );
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  // We also canonicalize the Node, moving constants to the right input,
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  // and flatten expressions (so that 1+x+2 becomes x+3).
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  virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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  // Compute a new Type for this node.  Basically we just do the pre-check,
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  // then call the virtual add() to set the type.
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  virtual const Type *Value( PhaseTransform *phase ) const;
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  // Supplied function returns the product of the inputs.
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  // This also type-checks the inputs for sanity.  Guaranteed never to
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  // be passed a TOP or BOTTOM type, these are filtered out by a pre-check.
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  // This call recognizes the multiplicative zero type.
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  virtual const Type *mul_ring( const Type *, const Type * ) const = 0;
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  // Supplied function to return the multiplicative identity type
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  virtual const Type *mul_id() const = 0;
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  // Supplied function to return the additive identity type
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  virtual const Type *add_id() const = 0;
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  // Supplied function to return the additive opcode
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  virtual int add_opcode() const = 0;
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  // Supplied function to return the multiplicative opcode
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  virtual int mul_opcode() const = 0;
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};
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//------------------------------MulINode---------------------------------------
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// Multiply 2 integers
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class MulINode : public MulNode {
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  MulINode( Node *in1, Node *in2 ) : MulNode(in1,in2) {}
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  virtual int Opcode() const;
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  virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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  virtual const Type *mul_ring( const Type *, const Type * ) const;
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  const Type *mul_id() const { return TypeInt::ONE; }
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  const Type *add_id() const { return TypeInt::ZERO; }
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  int add_opcode() const { return Op_AddI; }
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  int mul_opcode() const { return Op_MulI; }
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  const Type *bottom_type() const { return TypeInt::INT; }
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  virtual uint ideal_reg() const { return Op_RegI; }
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};
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//------------------------------MulLNode---------------------------------------
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// Multiply 2 longs
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class MulLNode : public MulNode {
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  MulLNode( Node *in1, Node *in2 ) : MulNode(in1,in2) {}
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  virtual int Opcode() const;
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  virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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  virtual const Type *mul_ring( const Type *, const Type * ) const;
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  const Type *mul_id() const { return TypeLong::ONE; }
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  const Type *add_id() const { return TypeLong::ZERO; }
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  int add_opcode() const { return Op_AddL; }
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  int mul_opcode() const { return Op_MulL; }
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  const Type *bottom_type() const { return TypeLong::LONG; }
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  virtual uint ideal_reg() const { return Op_RegL; }
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};
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//------------------------------MulFNode---------------------------------------
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// Multiply 2 floats
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class MulFNode : public MulNode {
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public:
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  MulFNode( Node *in1, Node *in2 ) : MulNode(in1,in2) {}
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  virtual int Opcode() const;
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  virtual const Type *mul_ring( const Type *, const Type * ) const;
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  const Type *mul_id() const { return TypeF::ONE; }
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  const Type *add_id() const { return TypeF::ZERO; }
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  int add_opcode() const { return Op_AddF; }
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  int mul_opcode() const { return Op_MulF; }
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  const Type *bottom_type() const { return Type::FLOAT; }
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  virtual uint ideal_reg() const { return Op_RegF; }
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};
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//------------------------------MulDNode---------------------------------------
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// Multiply 2 doubles
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class MulDNode : public MulNode {
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  MulDNode( Node *in1, Node *in2 ) : MulNode(in1,in2) {}
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  virtual int Opcode() const;
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  virtual const Type *mul_ring( const Type *, const Type * ) const;
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  const Type *mul_id() const { return TypeD::ONE; }
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  const Type *add_id() const { return TypeD::ZERO; }
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  int add_opcode() const { return Op_AddD; }
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  int mul_opcode() const { return Op_MulD; }
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  const Type *bottom_type() const { return Type::DOUBLE; }
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  virtual uint ideal_reg() const { return Op_RegD; }
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};
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//-------------------------------MulHiLNode------------------------------------
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// Upper 64 bits of a 64 bit by 64 bit multiply
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class MulHiLNode : public Node {
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  MulHiLNode( Node *in1, Node *in2 ) : Node(0,in1,in2) {}
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  virtual int Opcode() const;
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  virtual const Type *Value( PhaseTransform *phase ) const;
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  const Type *bottom_type() const { return TypeLong::LONG; }
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  virtual uint ideal_reg() const { return Op_RegL; }
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};
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//------------------------------AndINode---------------------------------------
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// Logically AND 2 integers.  Included with the MUL nodes because it inherits
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// all the behavior of multiplication on a ring.
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class AndINode : public MulINode {
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  AndINode( Node *in1, Node *in2 ) : MulINode(in1,in2) {}
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  virtual int Opcode() const;
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  virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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  virtual Node *Identity( PhaseTransform *phase );
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  virtual const Type *mul_ring( const Type *, const Type * ) const;
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  const Type *mul_id() const { return TypeInt::MINUS_1; }
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  const Type *add_id() const { return TypeInt::ZERO; }
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  int add_opcode() const { return Op_OrI; }
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  int mul_opcode() const { return Op_AndI; }
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  virtual uint ideal_reg() const { return Op_RegI; }
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};
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//------------------------------AndINode---------------------------------------
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// Logically AND 2 longs.  Included with the MUL nodes because it inherits
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// all the behavior of multiplication on a ring.
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class AndLNode : public MulLNode {
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  AndLNode( Node *in1, Node *in2 ) : MulLNode(in1,in2) {}
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  virtual int Opcode() const;
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  virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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  virtual Node *Identity( PhaseTransform *phase );
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  virtual const Type *mul_ring( const Type *, const Type * ) const;
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  const Type *mul_id() const { return TypeLong::MINUS_1; }
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  const Type *add_id() const { return TypeLong::ZERO; }
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  int add_opcode() const { return Op_OrL; }
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  int mul_opcode() const { return Op_AndL; }
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  virtual uint ideal_reg() const { return Op_RegL; }
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};
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//------------------------------LShiftINode------------------------------------
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// Logical shift left
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class LShiftINode : public Node {
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public:
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  LShiftINode( Node *in1, Node *in2 ) : Node(0,in1,in2) {}
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  virtual int Opcode() const;
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  virtual Node *Identity( PhaseTransform *phase );
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  virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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  virtual const Type *Value( PhaseTransform *phase ) const;
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  const Type *bottom_type() const { return TypeInt::INT; }
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  virtual uint ideal_reg() const { return Op_RegI; }
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};
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//------------------------------LShiftLNode------------------------------------
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// Logical shift left
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class LShiftLNode : public Node {
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public:
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  LShiftLNode( Node *in1, Node *in2 ) : Node(0,in1,in2) {}
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  virtual int Opcode() const;
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  virtual Node *Identity( PhaseTransform *phase );
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  virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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  virtual const Type *Value( PhaseTransform *phase ) const;
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  const Type *bottom_type() const { return TypeLong::LONG; }
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  virtual uint ideal_reg() const { return Op_RegL; }
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};
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//------------------------------RShiftINode------------------------------------
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// Signed shift right
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class RShiftINode : public Node {
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public:
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  RShiftINode( Node *in1, Node *in2 ) : Node(0,in1,in2) {}
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  virtual int Opcode() const;
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  virtual Node *Identity( PhaseTransform *phase );
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  virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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  virtual const Type *Value( PhaseTransform *phase ) const;
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  const Type *bottom_type() const { return TypeInt::INT; }
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  virtual uint ideal_reg() const { return Op_RegI; }
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};
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//------------------------------RShiftLNode------------------------------------
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// Signed shift right
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class RShiftLNode : public Node {
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public:
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  RShiftLNode( Node *in1, Node *in2 ) : Node(0,in1,in2) {}
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  virtual int Opcode() const;
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  virtual Node *Identity( PhaseTransform *phase );
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  virtual const Type *Value( PhaseTransform *phase ) const;
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  const Type *bottom_type() const { return TypeLong::LONG; }
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  virtual uint ideal_reg() const { return Op_RegL; }
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};
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//------------------------------URShiftINode-----------------------------------
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// Logical shift right
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class URShiftINode : public Node {
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public:
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  URShiftINode( Node *in1, Node *in2 ) : Node(0,in1,in2) {}
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  virtual int Opcode() const;
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  virtual Node *Identity( PhaseTransform *phase );
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  virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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  virtual const Type *Value( PhaseTransform *phase ) const;
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  const Type *bottom_type() const { return TypeInt::INT; }
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  virtual uint ideal_reg() const { return Op_RegI; }
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};
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//------------------------------URShiftLNode-----------------------------------
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// Logical shift right
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class URShiftLNode : public Node {
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public:
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  URShiftLNode( Node *in1, Node *in2 ) : Node(0,in1,in2) {}
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  virtual int Opcode() const;
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  virtual Node *Identity( PhaseTransform *phase );
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  virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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  virtual const Type *Value( PhaseTransform *phase ) const;
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  const Type *bottom_type() const { return TypeLong::LONG; }
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  virtual uint ideal_reg() const { return Op_RegL; }
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};
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#endif // SHARE_VM_OPTO_MULNODE_HPP