countbitsnode.hpp revision 10006:d9d0a63499ce 
1/*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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24
25#ifndef SHARE_VM_OPTO_COUNTBITSNODE_HPP
26#define SHARE_VM_OPTO_COUNTBITSNODE_HPP
27
28#include "opto/node.hpp"
29#include "opto/opcodes.hpp"
30
31class PhaseTransform;
32
33//---------- CountBitsNode -----------------------------------------------------
34class CountBitsNode : public Node {
35  public:
36  CountBitsNode(Node* in1) : Node(0, in1) {}
37  const Type* bottom_type() const { return TypeInt::INT; }
38  virtual uint ideal_reg() const { return Op_RegI; }
39};
40
41//---------- CountLeadingZerosINode --------------------------------------------
42// Count leading zeros (0-bit count starting from MSB) of an integer.
43class CountLeadingZerosINode : public CountBitsNode {
44  public:
45  CountLeadingZerosINode(Node* in1) : CountBitsNode(in1) {}
46  virtual int Opcode() const;
47  virtual const Type* Value(PhaseGVN* phase) const;
48};
49
50//---------- CountLeadingZerosLNode --------------------------------------------
51// Count leading zeros (0-bit count starting from MSB) of a long.
52class CountLeadingZerosLNode : public CountBitsNode {
53  public:
54  CountLeadingZerosLNode(Node* in1) : CountBitsNode(in1) {}
55  virtual int Opcode() const;
56  virtual const Type* Value(PhaseGVN* phase) const;
57};
58
59//---------- CountTrailingZerosINode -------------------------------------------
60// Count trailing zeros (0-bit count starting from LSB) of an integer.
61class CountTrailingZerosINode : public CountBitsNode {
62  public:
63  CountTrailingZerosINode(Node* in1) : CountBitsNode(in1) {}
64  virtual int Opcode() const;
65  virtual const Type* Value(PhaseGVN* phase) const;
66};
67
68//---------- CountTrailingZerosLNode -------------------------------------------
69// Count trailing zeros (0-bit count starting from LSB) of a long.
70class CountTrailingZerosLNode : public CountBitsNode {
71  public:
72  CountTrailingZerosLNode(Node* in1) : CountBitsNode(in1) {}
73  virtual int Opcode() const;
74  virtual const Type* Value(PhaseGVN* phase) const;
75};
76
77//---------- PopCountINode -----------------------------------------------------
78// Population count (bit count) of an integer.
79class PopCountINode : public CountBitsNode {
80  public:
81  PopCountINode(Node* in1) : CountBitsNode(in1) {}
82  virtual int Opcode() const;
83};
84
85//---------- PopCountLNode -----------------------------------------------------
86// Population count (bit count) of a long.
87class PopCountLNode : public CountBitsNode {
88  public:
89  PopCountLNode(Node* in1) : CountBitsNode(in1) {}
90  virtual int Opcode() const;
91};
92
93
94#endif // SHARE_VM_OPTO_COUNTBITSNODE_HPP
95