Mercurial > hg > truffle
annotate src/share/vm/opto/subnode.hpp @ 113:ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv
Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
author | coleenp |
---|---|
date | Sun, 13 Apr 2008 17:43:42 -0400 |
parents | a61af66fc99e |
children | d1605aabd0a1 |
rev | line source |
---|---|
0 | 1 /* |
2 * Copyright 1997-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 // Portions of code courtesy of Clifford Click | |
26 | |
27 //------------------------------SUBNode---------------------------------------- | |
28 // Class SUBTRACTION functionality. This covers all the usual 'subtract' | |
29 // behaviors. Subtract-integer, -float, -double, binary xor, compare-integer, | |
30 // -float, and -double are all inherited from this class. The compare | |
31 // functions behave like subtract functions, except that all negative answers | |
32 // are compressed into -1, and all positive answers compressed to 1. | |
33 class SubNode : public Node { | |
34 public: | |
35 SubNode( Node *in1, Node *in2 ) : Node(0,in1,in2) { | |
36 init_class_id(Class_Sub); | |
37 } | |
38 | |
39 // Handle algebraic identities here. If we have an identity, return the Node | |
40 // we are equivalent to. We look for "add of zero" as an identity. | |
41 virtual Node *Identity( PhaseTransform *phase ); | |
42 | |
43 // Compute a new Type for this node. Basically we just do the pre-check, | |
44 // then call the virtual add() to set the type. | |
45 virtual const Type *Value( PhaseTransform *phase ) const; | |
46 | |
47 // Supplied function returns the subtractend of the inputs. | |
48 // This also type-checks the inputs for sanity. Guaranteed never to | |
49 // be passed a TOP or BOTTOM type, these are filtered out by a pre-check. | |
50 virtual const Type *sub( const Type *, const Type * ) const = 0; | |
51 | |
52 // Supplied function to return the additive identity type. | |
53 // This is returned whenever the subtracts inputs are the same. | |
54 virtual const Type *add_id() const = 0; | |
55 | |
56 }; | |
57 | |
58 | |
59 // NOTE: SubINode should be taken away and replaced by add and negate | |
60 //------------------------------SubINode--------------------------------------- | |
61 // Subtract 2 integers | |
62 class SubINode : public SubNode { | |
63 public: | |
64 SubINode( Node *in1, Node *in2 ) : SubNode(in1,in2) {} | |
65 virtual int Opcode() const; | |
66 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
67 virtual const Type *sub( const Type *, const Type * ) const; | |
68 const Type *add_id() const { return TypeInt::ZERO; } | |
69 const Type *bottom_type() const { return TypeInt::INT; } | |
70 virtual uint ideal_reg() const { return Op_RegI; } | |
71 }; | |
72 | |
73 //------------------------------SubLNode--------------------------------------- | |
74 // Subtract 2 integers | |
75 class SubLNode : public SubNode { | |
76 public: | |
77 SubLNode( Node *in1, Node *in2 ) : SubNode(in1,in2) {} | |
78 virtual int Opcode() const; | |
79 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
80 virtual const Type *sub( const Type *, const Type * ) const; | |
81 const Type *add_id() const { return TypeLong::ZERO; } | |
82 const Type *bottom_type() const { return TypeLong::LONG; } | |
83 virtual uint ideal_reg() const { return Op_RegL; } | |
84 }; | |
85 | |
86 // NOTE: SubFPNode should be taken away and replaced by add and negate | |
87 //------------------------------SubFPNode-------------------------------------- | |
88 // Subtract 2 floats or doubles | |
89 class SubFPNode : public SubNode { | |
90 protected: | |
91 SubFPNode( Node *in1, Node *in2 ) : SubNode(in1,in2) {} | |
92 public: | |
93 const Type *Value( PhaseTransform *phase ) const; | |
94 }; | |
95 | |
96 // NOTE: SubFNode should be taken away and replaced by add and negate | |
97 //------------------------------SubFNode--------------------------------------- | |
98 // Subtract 2 doubles | |
99 class SubFNode : public SubFPNode { | |
100 public: | |
101 SubFNode( Node *in1, Node *in2 ) : SubFPNode(in1,in2) {} | |
102 virtual int Opcode() const; | |
103 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
104 virtual const Type *sub( const Type *, const Type * ) const; | |
105 const Type *add_id() const { return TypeF::ZERO; } | |
106 const Type *bottom_type() const { return Type::FLOAT; } | |
107 virtual uint ideal_reg() const { return Op_RegF; } | |
108 }; | |
109 | |
110 // NOTE: SubDNode should be taken away and replaced by add and negate | |
111 //------------------------------SubDNode--------------------------------------- | |
112 // Subtract 2 doubles | |
113 class SubDNode : public SubFPNode { | |
114 public: | |
115 SubDNode( Node *in1, Node *in2 ) : SubFPNode(in1,in2) {} | |
116 virtual int Opcode() const; | |
117 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
118 virtual const Type *sub( const Type *, const Type * ) const; | |
119 const Type *add_id() const { return TypeD::ZERO; } | |
120 const Type *bottom_type() const { return Type::DOUBLE; } | |
121 virtual uint ideal_reg() const { return Op_RegD; } | |
122 }; | |
123 | |
124 //------------------------------CmpNode--------------------------------------- | |
125 // Compare 2 values, returning condition codes (-1, 0 or 1). | |
126 class CmpNode : public SubNode { | |
127 public: | |
128 CmpNode( Node *in1, Node *in2 ) : SubNode(in1,in2) { | |
129 init_class_id(Class_Cmp); | |
130 } | |
131 virtual Node *Identity( PhaseTransform *phase ); | |
132 const Type *add_id() const { return TypeInt::ZERO; } | |
133 const Type *bottom_type() const { return TypeInt::CC; } | |
134 virtual uint ideal_reg() const { return Op_RegFlags; } | |
135 }; | |
136 | |
137 //------------------------------CmpINode--------------------------------------- | |
138 // Compare 2 signed values, returning condition codes (-1, 0 or 1). | |
139 class CmpINode : public CmpNode { | |
140 public: | |
141 CmpINode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {} | |
142 virtual int Opcode() const; | |
143 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
144 virtual const Type *sub( const Type *, const Type * ) const; | |
145 }; | |
146 | |
147 //------------------------------CmpUNode--------------------------------------- | |
148 // Compare 2 unsigned values (integer or pointer), returning condition codes (-1, 0 or 1). | |
149 class CmpUNode : public CmpNode { | |
150 public: | |
151 CmpUNode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {} | |
152 virtual int Opcode() const; | |
153 virtual const Type *sub( const Type *, const Type * ) const; | |
154 }; | |
155 | |
156 //------------------------------CmpPNode--------------------------------------- | |
157 // Compare 2 pointer values, returning condition codes (-1, 0 or 1). | |
158 class CmpPNode : public CmpNode { | |
159 public: | |
160 CmpPNode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {} | |
161 virtual int Opcode() const; | |
162 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
163 virtual const Type *sub( const Type *, const Type * ) const; | |
164 }; | |
165 | |
113
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166 //------------------------------CmpNNode-------------------------------------- |
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167 // Compare 2 narrow oop values, returning condition codes (-1, 0 or 1). |
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168 class CmpNNode : public CmpNode { |
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169 public: |
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170 CmpNNode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {} |
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171 virtual int Opcode() const; |
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172 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); |
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173 virtual const Type *sub( const Type *, const Type * ) const; |
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174 }; |
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175 |
0 | 176 //------------------------------CmpLNode--------------------------------------- |
177 // Compare 2 long values, returning condition codes (-1, 0 or 1). | |
178 class CmpLNode : public CmpNode { | |
179 public: | |
180 CmpLNode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {} | |
181 virtual int Opcode() const; | |
182 virtual const Type *sub( const Type *, const Type * ) const; | |
183 }; | |
184 | |
185 //------------------------------CmpL3Node-------------------------------------- | |
186 // Compare 2 long values, returning integer value (-1, 0 or 1). | |
187 class CmpL3Node : public CmpLNode { | |
188 public: | |
189 CmpL3Node( Node *in1, Node *in2 ) : CmpLNode(in1,in2) { | |
190 // Since it is not consumed by Bools, it is not really a Cmp. | |
191 init_class_id(Class_Sub); | |
192 } | |
193 virtual int Opcode() const; | |
194 virtual uint ideal_reg() const { return Op_RegI; } | |
195 }; | |
196 | |
197 //------------------------------CmpFNode--------------------------------------- | |
198 // Compare 2 float values, returning condition codes (-1, 0 or 1). | |
199 // This implements the Java bytecode fcmpl, so unordered returns -1. | |
200 // Operands may not commute. | |
201 class CmpFNode : public CmpNode { | |
202 public: | |
203 CmpFNode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {} | |
204 virtual int Opcode() const; | |
205 virtual const Type *sub( const Type *, const Type * ) const { ShouldNotReachHere(); return NULL; } | |
206 const Type *Value( PhaseTransform *phase ) const; | |
207 }; | |
208 | |
209 //------------------------------CmpF3Node-------------------------------------- | |
210 // Compare 2 float values, returning integer value (-1, 0 or 1). | |
211 // This implements the Java bytecode fcmpl, so unordered returns -1. | |
212 // Operands may not commute. | |
213 class CmpF3Node : public CmpFNode { | |
214 public: | |
215 CmpF3Node( Node *in1, Node *in2 ) : CmpFNode(in1,in2) { | |
216 // Since it is not consumed by Bools, it is not really a Cmp. | |
217 init_class_id(Class_Sub); | |
218 } | |
219 virtual int Opcode() const; | |
220 // Since it is not consumed by Bools, it is not really a Cmp. | |
221 virtual uint ideal_reg() const { return Op_RegI; } | |
222 }; | |
223 | |
224 | |
225 //------------------------------CmpDNode--------------------------------------- | |
226 // Compare 2 double values, returning condition codes (-1, 0 or 1). | |
227 // This implements the Java bytecode dcmpl, so unordered returns -1. | |
228 // Operands may not commute. | |
229 class CmpDNode : public CmpNode { | |
230 public: | |
231 CmpDNode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {} | |
232 virtual int Opcode() const; | |
233 virtual const Type *sub( const Type *, const Type * ) const { ShouldNotReachHere(); return NULL; } | |
234 const Type *Value( PhaseTransform *phase ) const; | |
235 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
236 }; | |
237 | |
238 //------------------------------CmpD3Node-------------------------------------- | |
239 // Compare 2 double values, returning integer value (-1, 0 or 1). | |
240 // This implements the Java bytecode dcmpl, so unordered returns -1. | |
241 // Operands may not commute. | |
242 class CmpD3Node : public CmpDNode { | |
243 public: | |
244 CmpD3Node( Node *in1, Node *in2 ) : CmpDNode(in1,in2) { | |
245 // Since it is not consumed by Bools, it is not really a Cmp. | |
246 init_class_id(Class_Sub); | |
247 } | |
248 virtual int Opcode() const; | |
249 virtual uint ideal_reg() const { return Op_RegI; } | |
250 }; | |
251 | |
252 | |
253 //------------------------------BoolTest--------------------------------------- | |
254 // Convert condition codes to a boolean test value (0 or -1). | |
255 // We pick the values as 3 bits; the low order 2 bits we compare against the | |
256 // condition codes, the high bit flips the sense of the result. | |
257 struct BoolTest VALUE_OBJ_CLASS_SPEC { | |
258 enum mask { eq = 0, ne = 4, le = 5, ge = 7, lt = 3, gt = 1, illegal = 8 }; | |
259 mask _test; | |
260 BoolTest( mask btm ) : _test(btm) {} | |
261 const Type *cc2logical( const Type *CC ) const; | |
262 // Commute the test. I use a small table lookup. The table is created as | |
263 // a simple char array where each element is the ASCII version of a 'mask' | |
264 // enum from above. | |
265 mask commute( ) const { return mask("038147858"[_test]-'0'); } | |
266 mask negate( ) const { return mask(_test^4); } | |
267 bool is_canonical( ) const { return (_test == BoolTest::ne || _test == BoolTest::lt || _test == BoolTest::le); } | |
268 #ifndef PRODUCT | |
269 void dump_on(outputStream *st) const; | |
270 #endif | |
271 }; | |
272 | |
273 //------------------------------BoolNode--------------------------------------- | |
274 // A Node to convert a Condition Codes to a Logical result. | |
275 class BoolNode : public Node { | |
276 virtual uint hash() const; | |
277 virtual uint cmp( const Node &n ) const; | |
278 virtual uint size_of() const; | |
279 public: | |
280 const BoolTest _test; | |
281 BoolNode( Node *cc, BoolTest::mask t): _test(t), Node(0,cc) { | |
282 init_class_id(Class_Bool); | |
283 } | |
284 // Convert an arbitrary int value to a Bool or other suitable predicate. | |
285 static Node* make_predicate(Node* test_value, PhaseGVN* phase); | |
286 // Convert self back to an integer value. | |
287 Node* as_int_value(PhaseGVN* phase); | |
288 // Invert sense of self, returning new Bool. | |
289 BoolNode* negate(PhaseGVN* phase); | |
290 virtual int Opcode() const; | |
291 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
292 virtual const Type *Value( PhaseTransform *phase ) const; | |
293 virtual const Type *bottom_type() const { return TypeInt::BOOL; } | |
294 uint match_edge(uint idx) const { return 0; } | |
295 virtual uint ideal_reg() const { return Op_RegI; } | |
296 | |
297 bool is_counted_loop_exit_test(); | |
298 #ifndef PRODUCT | |
299 virtual void dump_spec(outputStream *st) const; | |
300 #endif | |
301 }; | |
302 | |
303 //------------------------------AbsNode---------------------------------------- | |
304 // Abstract class for absolute value. Mostly used to get a handy wrapper | |
305 // for finding this pattern in the graph. | |
306 class AbsNode : public Node { | |
307 public: | |
308 AbsNode( Node *value ) : Node(0,value) {} | |
309 }; | |
310 | |
311 //------------------------------AbsINode--------------------------------------- | |
312 // Absolute value an integer. Since a naive graph involves control flow, we | |
313 // "match" it in the ideal world (so the control flow can be removed). | |
314 class AbsINode : public AbsNode { | |
315 public: | |
316 AbsINode( Node *in1 ) : AbsNode(in1) {} | |
317 virtual int Opcode() const; | |
318 const Type *bottom_type() const { return TypeInt::INT; } | |
319 virtual uint ideal_reg() const { return Op_RegI; } | |
320 }; | |
321 | |
322 //------------------------------AbsFNode--------------------------------------- | |
323 // Absolute value a float, a common float-point idiom with a cheap hardware | |
324 // implemention on most chips. Since a naive graph involves control flow, we | |
325 // "match" it in the ideal world (so the control flow can be removed). | |
326 class AbsFNode : public AbsNode { | |
327 public: | |
328 AbsFNode( Node *in1 ) : AbsNode(in1) {} | |
329 virtual int Opcode() const; | |
330 const Type *bottom_type() const { return Type::FLOAT; } | |
331 virtual uint ideal_reg() const { return Op_RegF; } | |
332 }; | |
333 | |
334 //------------------------------AbsDNode--------------------------------------- | |
335 // Absolute value a double, a common float-point idiom with a cheap hardware | |
336 // implemention on most chips. Since a naive graph involves control flow, we | |
337 // "match" it in the ideal world (so the control flow can be removed). | |
338 class AbsDNode : public AbsNode { | |
339 public: | |
340 AbsDNode( Node *in1 ) : AbsNode(in1) {} | |
341 virtual int Opcode() const; | |
342 const Type *bottom_type() const { return Type::DOUBLE; } | |
343 virtual uint ideal_reg() const { return Op_RegD; } | |
344 }; | |
345 | |
346 | |
347 //------------------------------CmpLTMaskNode---------------------------------- | |
348 // If p < q, return -1 else return 0. Nice for flow-free idioms. | |
349 class CmpLTMaskNode : public Node { | |
350 public: | |
351 CmpLTMaskNode( Node *p, Node *q ) : Node(0, p, q) {} | |
352 virtual int Opcode() const; | |
353 const Type *bottom_type() const { return TypeInt::INT; } | |
354 virtual uint ideal_reg() const { return Op_RegI; } | |
355 }; | |
356 | |
357 | |
358 //------------------------------NegNode---------------------------------------- | |
359 class NegNode : public Node { | |
360 public: | |
361 NegNode( Node *in1 ) : Node(0,in1) {} | |
362 }; | |
363 | |
364 //------------------------------NegFNode--------------------------------------- | |
365 // Negate value a float. Negating 0.0 returns -0.0, but subtracting from | |
366 // zero returns +0.0 (per JVM spec on 'fneg' bytecode). As subtraction | |
367 // cannot be used to replace negation we have to implement negation as ideal | |
368 // node; note that negation and addition can replace subtraction. | |
369 class NegFNode : public NegNode { | |
370 public: | |
371 NegFNode( Node *in1 ) : NegNode(in1) {} | |
372 virtual int Opcode() const; | |
373 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
374 const Type *bottom_type() const { return Type::FLOAT; } | |
375 virtual uint ideal_reg() const { return Op_RegF; } | |
376 }; | |
377 | |
378 //------------------------------NegDNode--------------------------------------- | |
379 // Negate value a double. Negating 0.0 returns -0.0, but subtracting from | |
380 // zero returns +0.0 (per JVM spec on 'dneg' bytecode). As subtraction | |
381 // cannot be used to replace negation we have to implement negation as ideal | |
382 // node; note that negation and addition can replace subtraction. | |
383 class NegDNode : public NegNode { | |
384 public: | |
385 NegDNode( Node *in1 ) : NegNode(in1) {} | |
386 virtual int Opcode() const; | |
387 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); | |
388 const Type *bottom_type() const { return Type::DOUBLE; } | |
389 virtual uint ideal_reg() const { return Op_RegD; } | |
390 }; | |
391 | |
392 //------------------------------CosDNode--------------------------------------- | |
393 // Cosinus of a double | |
394 class CosDNode : public Node { | |
395 public: | |
396 CosDNode( Node *in1 ) : Node(0, in1) {} | |
397 virtual int Opcode() const; | |
398 const Type *bottom_type() const { return Type::DOUBLE; } | |
399 virtual uint ideal_reg() const { return Op_RegD; } | |
400 virtual const Type *Value( PhaseTransform *phase ) const; | |
401 }; | |
402 | |
403 //------------------------------CosDNode--------------------------------------- | |
404 // Sinus of a double | |
405 class SinDNode : public Node { | |
406 public: | |
407 SinDNode( Node *in1 ) : Node(0, in1) {} | |
408 virtual int Opcode() const; | |
409 const Type *bottom_type() const { return Type::DOUBLE; } | |
410 virtual uint ideal_reg() const { return Op_RegD; } | |
411 virtual const Type *Value( PhaseTransform *phase ) const; | |
412 }; | |
413 | |
414 | |
415 //------------------------------TanDNode--------------------------------------- | |
416 // tangens of a double | |
417 class TanDNode : public Node { | |
418 public: | |
419 TanDNode(Node *in1 ) : Node(0, in1) {} | |
420 virtual int Opcode() const; | |
421 const Type *bottom_type() const { return Type::DOUBLE; } | |
422 virtual uint ideal_reg() const { return Op_RegD; } | |
423 virtual const Type *Value( PhaseTransform *phase ) const; | |
424 }; | |
425 | |
426 | |
427 //------------------------------AtanDNode-------------------------------------- | |
428 // arcus tangens of a double | |
429 class AtanDNode : public Node { | |
430 public: | |
431 AtanDNode(Node *c, Node *in1, Node *in2 ) : Node(c, in1, in2) {} | |
432 virtual int Opcode() const; | |
433 const Type *bottom_type() const { return Type::DOUBLE; } | |
434 virtual uint ideal_reg() const { return Op_RegD; } | |
435 }; | |
436 | |
437 | |
438 //------------------------------SqrtDNode-------------------------------------- | |
439 // square root a double | |
440 class SqrtDNode : public Node { | |
441 public: | |
442 SqrtDNode(Node *c, Node *in1 ) : Node(c, in1) {} | |
443 virtual int Opcode() const; | |
444 const Type *bottom_type() const { return Type::DOUBLE; } | |
445 virtual uint ideal_reg() const { return Op_RegD; } | |
446 virtual const Type *Value( PhaseTransform *phase ) const; | |
447 }; | |
448 | |
449 //------------------------------ExpDNode--------------------------------------- | |
450 // Exponentiate a double | |
451 class ExpDNode : public Node { | |
452 public: | |
453 ExpDNode( Node *c, Node *in1 ) : Node(c, in1) {} | |
454 virtual int Opcode() const; | |
455 const Type *bottom_type() const { return Type::DOUBLE; } | |
456 virtual uint ideal_reg() const { return Op_RegD; } | |
457 virtual const Type *Value( PhaseTransform *phase ) const; | |
458 }; | |
459 | |
460 //------------------------------LogDNode--------------------------------------- | |
461 // Log_e of a double | |
462 class LogDNode : public Node { | |
463 public: | |
464 LogDNode( Node *in1 ) : Node(0, in1) {} | |
465 virtual int Opcode() const; | |
466 const Type *bottom_type() const { return Type::DOUBLE; } | |
467 virtual uint ideal_reg() const { return Op_RegD; } | |
468 virtual const Type *Value( PhaseTransform *phase ) const; | |
469 }; | |
470 | |
471 //------------------------------Log10DNode--------------------------------------- | |
472 // Log_10 of a double | |
473 class Log10DNode : public Node { | |
474 public: | |
475 Log10DNode( Node *in1 ) : Node(0, in1) {} | |
476 virtual int Opcode() const; | |
477 const Type *bottom_type() const { return Type::DOUBLE; } | |
478 virtual uint ideal_reg() const { return Op_RegD; } | |
479 virtual const Type *Value( PhaseTransform *phase ) const; | |
480 }; | |
481 | |
482 //------------------------------PowDNode--------------------------------------- | |
483 // Raise a double to a double power | |
484 class PowDNode : public Node { | |
485 public: | |
486 PowDNode(Node *c, Node *in1, Node *in2 ) : Node(c, in1, in2) {} | |
487 virtual int Opcode() const; | |
488 const Type *bottom_type() const { return Type::DOUBLE; } | |
489 virtual uint ideal_reg() const { return Op_RegD; } | |
490 virtual const Type *Value( PhaseTransform *phase ) const; | |
491 }; | |
492 | |
493 //-------------------------------ReverseBytesINode-------------------------------- | |
494 // reverse bytes of an integer | |
495 class ReverseBytesINode : public Node { | |
496 public: | |
497 ReverseBytesINode(Node *c, Node *in1) : Node(c, in1) {} | |
498 virtual int Opcode() const; | |
499 const Type *bottom_type() const { return TypeInt::INT; } | |
500 virtual uint ideal_reg() const { return Op_RegI; } | |
501 }; | |
502 | |
503 //-------------------------------ReverseBytesLNode-------------------------------- | |
504 // reverse bytes of a long | |
505 class ReverseBytesLNode : public Node { | |
506 public: | |
507 ReverseBytesLNode(Node *c, Node *in1) : Node(c, in1) {} | |
508 virtual int Opcode() const; | |
509 const Type *bottom_type() const { return TypeLong::LONG; } | |
510 virtual uint ideal_reg() const { return Op_RegL; } | |
511 }; |