1 /*
2 * Copyright (c) 1997, 2023, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_OPTO_DIVNODE_HPP
26 #define SHARE_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
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(PhaseGVN* phase);
48 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
49 virtual const Type* Value(PhaseGVN* 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(PhaseGVN* phase);
61 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
62 virtual const Type* Value(PhaseGVN* 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(PhaseGVN* phase);
74 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
75 virtual const Type* Value(PhaseGVN* 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(PhaseGVN* phase);
87 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
88 virtual const Type* Value(PhaseGVN* phase) const;
89 virtual const Type *bottom_type() const { return Type::DOUBLE; }
90 virtual uint ideal_reg() const { return Op_RegD; }
91 };
92
93 //------------------------------UDivINode---------------------------------------
94 // Unsigned integer division
95 class UDivINode : public Node {
96 public:
97 UDivINode( Node *c, Node *dividend, Node *divisor ) : Node(c, dividend, divisor ) {}
98 virtual int Opcode() const;
99 virtual Node* Identity(PhaseGVN* phase);
100 virtual const Type* Value(PhaseGVN* phase) const;
101 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
102 virtual const Type *bottom_type() const { return TypeInt::INT; }
103 virtual uint ideal_reg() const { return Op_RegI; }
104 };
105
106 //------------------------------UDivLNode---------------------------------------
107 // Unsigned long division
108 class UDivLNode : public Node {
109 public:
110 UDivLNode( Node *c, Node *dividend, Node *divisor ) : Node(c, dividend, divisor ) {}
111 virtual int Opcode() const;
112 virtual Node* Identity(PhaseGVN* phase);
113 virtual const Type* Value(PhaseGVN* phase) const;
114 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
115 virtual const Type *bottom_type() const { return TypeLong::LONG; }
116 virtual uint ideal_reg() const { return Op_RegL; }
117 };
118
119 //------------------------------ModINode---------------------------------------
120 // Integer modulus
121 class ModINode : public Node {
122 public:
123 ModINode( Node *c, Node *in1, Node *in2 ) : Node(c,in1, in2) {}
124 virtual int Opcode() const;
125 virtual const Type* Value(PhaseGVN* phase) const;
126 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
127 virtual const Type *bottom_type() const { return TypeInt::INT; }
128 virtual uint ideal_reg() const { return Op_RegI; }
129 };
130
131 //------------------------------ModLNode---------------------------------------
132 // Long modulus
133 class ModLNode : public Node {
134 public:
135 ModLNode( Node *c, Node *in1, Node *in2 ) : Node(c,in1, in2) {}
136 virtual int Opcode() const;
137 virtual const Type* Value(PhaseGVN* phase) const;
138 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
139 virtual const Type *bottom_type() const { return TypeLong::LONG; }
140 virtual uint ideal_reg() const { return Op_RegL; }
141 };
142
143 //------------------------------ModFNode---------------------------------------
144 // Float Modulus
145 class ModFNode : public Node {
146 public:
147 ModFNode( Node *c, Node *in1, Node *in2 ) : Node(c,in1, in2) {}
148 virtual int Opcode() const;
149 virtual const Type* Value(PhaseGVN* phase) const;
150 virtual const Type *bottom_type() const { return Type::FLOAT; }
151 virtual uint ideal_reg() const { return Op_RegF; }
152 };
153
154 //------------------------------ModDNode---------------------------------------
155 // Double Modulus
156 class ModDNode : public Node {
157 public:
158 ModDNode( Node *c, Node *in1, Node *in2 ) : Node(c, in1, in2) {}
159 virtual int Opcode() const;
160 virtual const Type* Value(PhaseGVN* phase) const;
161 virtual const Type *bottom_type() const { return Type::DOUBLE; }
162 virtual uint ideal_reg() const { return Op_RegD; }
163 };
164
165 //------------------------------UModINode---------------------------------------
166 // Unsigned integer modulus
167 class UModINode : public Node {
168 public:
169 UModINode( Node *c, Node *in1, Node *in2 ) : Node(c,in1, in2) {}
170 virtual int Opcode() const;
171 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
172 virtual const Type *bottom_type() const { return TypeInt::INT; }
173 virtual uint ideal_reg() const { return Op_RegI; }
174 };
175
176 //------------------------------UModLNode---------------------------------------
177 // Unsigned long modulus
178 class UModLNode : public Node {
179 public:
180 UModLNode( Node *c, Node *in1, Node *in2 ) : Node(c,in1, in2) {}
181 virtual int Opcode() const;
182 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
183 virtual const Type *bottom_type() const { return TypeLong::LONG; }
184 virtual uint ideal_reg() const { return Op_RegL; }
185 };
186
187 //------------------------------DivModNode---------------------------------------
188 // Division with remainder result.
189 class DivModNode : public MultiNode {
190 protected:
191 DivModNode( Node *c, Node *dividend, Node *divisor );
192 public:
193 enum {
194 div_proj_num = 0, // quotient
195 mod_proj_num = 1 // remainder
196 };
197 virtual int Opcode() const;
198 virtual Node* Identity(PhaseGVN* phase) { return this; }
199 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape) { return nullptr; }
200 virtual const Type* Value(PhaseGVN* phase) const { return bottom_type(); }
201 virtual uint hash() const { return Node::hash(); }
202 virtual bool is_CFG() const { return false; }
203 virtual uint ideal_reg() const { return NotAMachineReg; }
204
205 static DivModNode* make(Node* div_or_mod, BasicType bt, bool is_unsigned);
206
207 ProjNode* div_proj() { return proj_out_or_null(div_proj_num); }
208 ProjNode* mod_proj() { return proj_out_or_null(mod_proj_num); }
209 };
210
211 //------------------------------DivModINode---------------------------------------
212 // Integer division with remainder result.
213 class DivModINode : public DivModNode {
214 public:
215 DivModINode( Node *c, Node *dividend, Node *divisor ) : DivModNode(c, dividend, divisor) {}
216 virtual int Opcode() const;
217 virtual const Type *bottom_type() const { return TypeTuple::INT_PAIR; }
218 virtual Node *match(const ProjNode *proj, const Matcher *m, const RegMask* mask);
219
220 // Make a divmod and associated projections from a div or mod.
221 static DivModINode* make(Node* div_or_mod);
222 };
223
224 //------------------------------DivModLNode---------------------------------------
225 // Long division with remainder result.
226 class DivModLNode : public DivModNode {
227 public:
228 DivModLNode( Node *c, Node *dividend, Node *divisor ) : DivModNode(c, dividend, divisor) {}
229 virtual int Opcode() const;
230 virtual const Type *bottom_type() const { return TypeTuple::LONG_PAIR; }
231 virtual Node *match(const ProjNode *proj, const Matcher *m, const RegMask* mask);
232
233 // Make a divmod and associated projections from a div or mod.
234 static DivModLNode* make(Node* div_or_mod);
235 };
236
237
238 //------------------------------UDivModINode---------------------------------------
239 // Unsigend integer division with remainder result.
240 class UDivModINode : public DivModNode {
241 public:
242 UDivModINode( Node *c, Node *dividend, Node *divisor ) : DivModNode(c, dividend, divisor) {}
243 virtual int Opcode() const;
244 virtual const Type *bottom_type() const { return TypeTuple::INT_PAIR; }
245 virtual Node* match(const ProjNode* proj, const Matcher* m, const RegMask* mask);
246
247 // Make a divmod and associated projections from a div or mod.
248 static UDivModINode* make(Node* div_or_mod);
249 };
250
251 //------------------------------UDivModLNode---------------------------------------
252 // Unsigned long division with remainder result.
253 class UDivModLNode : public DivModNode {
254 public:
255 UDivModLNode( Node *c, Node *dividend, Node *divisor ) : DivModNode(c, dividend, divisor) {}
256 virtual int Opcode() const;
257 virtual const Type *bottom_type() const { return TypeTuple::LONG_PAIR; }
258 virtual Node* match(const ProjNode* proj, const Matcher* m, const RegMask* mask);
259
260 // Make a divmod and associated projections from a div or mod.
261 static UDivModLNode* make(Node* div_or_mod);
262 };
263
264 #endif // SHARE_OPTO_DIVNODE_HPP