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annotate src/share/vm/opto/divnode.hpp @ 10408:836a62f43af9
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
| author | Doug Simon <doug.simon@oracle.com> |
|---|---|
| date | Wed, 19 Jun 2013 10:45:56 +0200 |
| parents | f95d63e2154a |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_OPTO_DIVNODE_HPP |
| 26 #define SHARE_VM_OPTO_DIVNODE_HPP | |
| 27 | |
| 28 #include "opto/multnode.hpp" | |
| 29 #include "opto/node.hpp" | |
| 30 #include "opto/opcodes.hpp" | |
| 31 #include "opto/type.hpp" | |
| 32 | |
| 0 | 33 // Portions of code courtesy of Clifford Click |
| 34 | |
| 35 // Optimization - Graph Style | |
| 36 | |
| 37 | |
| 38 //------------------------------DivINode--------------------------------------- | |
| 39 // Integer division | |
| 40 // Note: this is division as defined by JVMS, i.e., MinInt/-1 == MinInt. | |
| 41 // On processors which don't naturally support this special case (e.g., x86), | |
| 42 // the matcher or runtime system must take care of this. | |
| 43 class DivINode : public Node { | |
| 44 public: | |
| 45 DivINode( Node *c, Node *dividend, Node *divisor ) : Node(c, dividend, divisor ) {} | |
| 46 virtual int Opcode() const; | |
| 47 virtual Node *Identity( PhaseTransform *phase ); | |
| 48 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
| 49 virtual const Type *Value( PhaseTransform *phase ) const; | |
| 50 virtual const Type *bottom_type() const { return TypeInt::INT; } | |
| 51 virtual uint ideal_reg() const { return Op_RegI; } | |
| 52 }; | |
| 53 | |
| 54 //------------------------------DivLNode--------------------------------------- | |
| 55 // Long division | |
| 56 class DivLNode : public Node { | |
| 57 public: | |
| 58 DivLNode( Node *c, Node *dividend, Node *divisor ) : Node(c, dividend, divisor ) {} | |
| 59 virtual int Opcode() const; | |
| 60 virtual Node *Identity( PhaseTransform *phase ); | |
| 61 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
| 62 virtual const Type *Value( PhaseTransform *phase ) const; | |
| 63 virtual const Type *bottom_type() const { return TypeLong::LONG; } | |
| 64 virtual uint ideal_reg() const { return Op_RegL; } | |
| 65 }; | |
| 66 | |
| 67 //------------------------------DivFNode--------------------------------------- | |
| 68 // Float division | |
| 69 class DivFNode : public Node { | |
| 70 public: | |
| 71 DivFNode( Node *c, Node *dividend, Node *divisor ) : Node(c, dividend, divisor) {} | |
| 72 virtual int Opcode() const; | |
| 73 virtual Node *Identity( PhaseTransform *phase ); | |
| 74 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
| 75 virtual const Type *Value( PhaseTransform *phase ) const; | |
| 76 virtual const Type *bottom_type() const { return Type::FLOAT; } | |
| 77 virtual uint ideal_reg() const { return Op_RegF; } | |
| 78 }; | |
| 79 | |
| 80 //------------------------------DivDNode--------------------------------------- | |
| 81 // Double division | |
| 82 class DivDNode : public Node { | |
| 83 public: | |
| 84 DivDNode( Node *c, Node *dividend, Node *divisor ) : Node(c,dividend, divisor) {} | |
| 85 virtual int Opcode() const; | |
| 86 virtual Node *Identity( PhaseTransform *phase ); | |
| 87 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
| 88 virtual const Type *Value( PhaseTransform *phase ) const; | |
| 89 virtual const Type *bottom_type() const { return Type::DOUBLE; } | |
| 90 virtual uint ideal_reg() const { return Op_RegD; } | |
| 91 }; | |
| 92 | |
| 93 //------------------------------ModINode--------------------------------------- | |
| 94 // Integer modulus | |
| 95 class ModINode : public Node { | |
| 96 public: | |
| 97 ModINode( Node *c, Node *in1, Node *in2 ) : Node(c,in1, in2) {} | |
| 98 virtual int Opcode() const; | |
| 99 virtual const Type *Value( PhaseTransform *phase ) const; | |
| 100 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
| 101 virtual const Type *bottom_type() const { return TypeInt::INT; } | |
| 102 virtual uint ideal_reg() const { return Op_RegI; } | |
| 103 }; | |
| 104 | |
| 105 //------------------------------ModLNode--------------------------------------- | |
| 106 // Long modulus | |
| 107 class ModLNode : public Node { | |
| 108 public: | |
| 109 ModLNode( Node *c, Node *in1, Node *in2 ) : Node(c,in1, in2) {} | |
| 110 virtual int Opcode() const; | |
| 111 virtual const Type *Value( PhaseTransform *phase ) const; | |
| 112 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
| 113 virtual const Type *bottom_type() const { return TypeLong::LONG; } | |
| 114 virtual uint ideal_reg() const { return Op_RegL; } | |
| 115 }; | |
| 116 | |
| 117 //------------------------------ModFNode--------------------------------------- | |
| 118 // Float Modulus | |
| 119 class ModFNode : public Node { | |
| 120 public: | |
| 121 ModFNode( Node *c, Node *in1, Node *in2 ) : Node(c,in1, in2) {} | |
| 122 virtual int Opcode() const; | |
| 123 virtual const Type *Value( PhaseTransform *phase ) const; | |
| 124 virtual const Type *bottom_type() const { return Type::FLOAT; } | |
| 125 virtual uint ideal_reg() const { return Op_RegF; } | |
| 126 }; | |
| 127 | |
| 128 //------------------------------ModDNode--------------------------------------- | |
| 129 // Double Modulus | |
| 130 class ModDNode : public Node { | |
| 131 public: | |
| 132 ModDNode( Node *c, Node *in1, Node *in2 ) : Node(c, in1, in2) {} | |
| 133 virtual int Opcode() const; | |
| 134 virtual const Type *Value( PhaseTransform *phase ) const; | |
| 135 virtual const Type *bottom_type() const { return Type::DOUBLE; } | |
| 136 virtual uint ideal_reg() const { return Op_RegD; } | |
| 137 }; | |
| 138 | |
| 139 //------------------------------DivModNode--------------------------------------- | |
| 140 // Division with remainder result. | |
| 141 class DivModNode : public MultiNode { | |
| 142 protected: | |
| 143 DivModNode( Node *c, Node *dividend, Node *divisor ); | |
| 144 public: | |
| 145 enum { | |
| 146 div_proj_num = 0, // quotient | |
| 147 mod_proj_num = 1 // remainder | |
| 148 }; | |
| 149 virtual int Opcode() const; | |
| 150 virtual Node *Identity( PhaseTransform *phase ) { return this; } | |
| 151 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape) { return NULL; } | |
| 152 virtual const Type *Value( PhaseTransform *phase ) const { return bottom_type(); } | |
| 153 virtual uint hash() const { return Node::hash(); } | |
| 154 virtual bool is_CFG() const { return false; } | |
| 155 virtual uint ideal_reg() const { return NotAMachineReg; } | |
| 156 | |
| 157 ProjNode* div_proj() { return proj_out(div_proj_num); } | |
| 158 ProjNode* mod_proj() { return proj_out(mod_proj_num); } | |
| 159 }; | |
| 160 | |
| 161 //------------------------------DivModINode--------------------------------------- | |
| 162 // Integer division with remainder result. | |
| 163 class DivModINode : public DivModNode { | |
| 164 public: | |
| 165 DivModINode( Node *c, Node *dividend, Node *divisor ) : DivModNode(c, dividend, divisor) {} | |
| 166 virtual int Opcode() const; | |
| 167 virtual const Type *bottom_type() const { return TypeTuple::INT_PAIR; } | |
| 168 virtual Node *match( const ProjNode *proj, const Matcher *m ); | |
| 169 | |
| 170 // Make a divmod and associated projections from a div or mod. | |
| 171 static DivModINode* make(Compile* C, Node* div_or_mod); | |
| 172 }; | |
| 173 | |
| 174 //------------------------------DivModLNode--------------------------------------- | |
| 175 // Long division with remainder result. | |
| 176 class DivModLNode : public DivModNode { | |
| 177 public: | |
| 178 DivModLNode( Node *c, Node *dividend, Node *divisor ) : DivModNode(c, dividend, divisor) {} | |
| 179 virtual int Opcode() const; | |
| 180 virtual const Type *bottom_type() const { return TypeTuple::LONG_PAIR; } | |
| 181 virtual Node *match( const ProjNode *proj, const Matcher *m ); | |
| 182 | |
| 183 // Make a divmod and associated projections from a div or mod. | |
| 184 static DivModLNode* make(Compile* C, Node* div_or_mod); | |
| 185 }; | |
| 1972 | 186 |
| 187 #endif // SHARE_VM_OPTO_DIVNODE_HPP |