Mercurial > hg > truffle
annotate src/cpu/x86/vm/c1_LIRGenerator_x86.cpp @ 1865:1c352af0135d
6763959: java.util.concurrent.locks.LockSupport.parkUntil(0) blocks forever
Summary: Absolute time 0 needs to return immediately.
Reviewed-by: phh, dcubed, dholmes
author | acorn |
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date | Mon, 04 Oct 2010 13:11:10 -0400 |
parents | 126ea7725993 |
children | d5d065957597 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2005, 2009, 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 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_c1_LIRGenerator_x86.cpp.incl" | |
27 | |
28 #ifdef ASSERT | |
29 #define __ gen()->lir(__FILE__, __LINE__)-> | |
30 #else | |
31 #define __ gen()->lir()-> | |
32 #endif | |
33 | |
34 // Item will be loaded into a byte register; Intel only | |
35 void LIRItem::load_byte_item() { | |
36 load_item(); | |
37 LIR_Opr res = result(); | |
38 | |
39 if (!res->is_virtual() || !_gen->is_vreg_flag_set(res, LIRGenerator::byte_reg)) { | |
40 // make sure that it is a byte register | |
41 assert(!value()->type()->is_float() && !value()->type()->is_double(), | |
42 "can't load floats in byte register"); | |
43 LIR_Opr reg = _gen->rlock_byte(T_BYTE); | |
44 __ move(res, reg); | |
45 | |
46 _result = reg; | |
47 } | |
48 } | |
49 | |
50 | |
51 void LIRItem::load_nonconstant() { | |
52 LIR_Opr r = value()->operand(); | |
53 if (r->is_constant()) { | |
54 _result = r; | |
55 } else { | |
56 load_item(); | |
57 } | |
58 } | |
59 | |
60 //-------------------------------------------------------------- | |
61 // LIRGenerator | |
62 //-------------------------------------------------------------- | |
63 | |
64 | |
65 LIR_Opr LIRGenerator::exceptionOopOpr() { return FrameMap::rax_oop_opr; } | |
66 LIR_Opr LIRGenerator::exceptionPcOpr() { return FrameMap::rdx_opr; } | |
67 LIR_Opr LIRGenerator::divInOpr() { return FrameMap::rax_opr; } | |
68 LIR_Opr LIRGenerator::divOutOpr() { return FrameMap::rax_opr; } | |
69 LIR_Opr LIRGenerator::remOutOpr() { return FrameMap::rdx_opr; } | |
70 LIR_Opr LIRGenerator::shiftCountOpr() { return FrameMap::rcx_opr; } | |
71 LIR_Opr LIRGenerator::syncTempOpr() { return FrameMap::rax_opr; } | |
72 LIR_Opr LIRGenerator::getThreadTemp() { return LIR_OprFact::illegalOpr; } | |
73 | |
74 | |
75 LIR_Opr LIRGenerator::result_register_for(ValueType* type, bool callee) { | |
76 LIR_Opr opr; | |
77 switch (type->tag()) { | |
78 case intTag: opr = FrameMap::rax_opr; break; | |
79 case objectTag: opr = FrameMap::rax_oop_opr; break; | |
304 | 80 case longTag: opr = FrameMap::long0_opr; break; |
0 | 81 case floatTag: opr = UseSSE >= 1 ? FrameMap::xmm0_float_opr : FrameMap::fpu0_float_opr; break; |
82 case doubleTag: opr = UseSSE >= 2 ? FrameMap::xmm0_double_opr : FrameMap::fpu0_double_opr; break; | |
83 | |
84 case addressTag: | |
85 default: ShouldNotReachHere(); return LIR_OprFact::illegalOpr; | |
86 } | |
87 | |
88 assert(opr->type_field() == as_OprType(as_BasicType(type)), "type mismatch"); | |
89 return opr; | |
90 } | |
91 | |
92 | |
93 LIR_Opr LIRGenerator::rlock_byte(BasicType type) { | |
94 LIR_Opr reg = new_register(T_INT); | |
95 set_vreg_flag(reg, LIRGenerator::byte_reg); | |
96 return reg; | |
97 } | |
98 | |
99 | |
100 //--------- loading items into registers -------------------------------- | |
101 | |
102 | |
103 // i486 instructions can inline constants | |
104 bool LIRGenerator::can_store_as_constant(Value v, BasicType type) const { | |
105 if (type == T_SHORT || type == T_CHAR) { | |
106 // there is no immediate move of word values in asembler_i486.?pp | |
107 return false; | |
108 } | |
109 Constant* c = v->as_Constant(); | |
110 if (c && c->state() == NULL) { | |
111 // constants of any type can be stored directly, except for | |
112 // unloaded object constants. | |
113 return true; | |
114 } | |
115 return false; | |
116 } | |
117 | |
118 | |
119 bool LIRGenerator::can_inline_as_constant(Value v) const { | |
304 | 120 if (v->type()->tag() == longTag) return false; |
0 | 121 return v->type()->tag() != objectTag || |
122 (v->type()->is_constant() && v->type()->as_ObjectType()->constant_value()->is_null_object()); | |
123 } | |
124 | |
125 | |
126 bool LIRGenerator::can_inline_as_constant(LIR_Const* c) const { | |
304 | 127 if (c->type() == T_LONG) return false; |
0 | 128 return c->type() != T_OBJECT || c->as_jobject() == NULL; |
129 } | |
130 | |
131 | |
132 LIR_Opr LIRGenerator::safepoint_poll_register() { | |
133 return LIR_OprFact::illegalOpr; | |
134 } | |
135 | |
136 | |
137 LIR_Address* LIRGenerator::generate_address(LIR_Opr base, LIR_Opr index, | |
138 int shift, int disp, BasicType type) { | |
139 assert(base->is_register(), "must be"); | |
140 if (index->is_constant()) { | |
141 return new LIR_Address(base, | |
142 (index->as_constant_ptr()->as_jint() << shift) + disp, | |
143 type); | |
144 } else { | |
145 return new LIR_Address(base, index, (LIR_Address::Scale)shift, disp, type); | |
146 } | |
147 } | |
148 | |
149 | |
150 LIR_Address* LIRGenerator::emit_array_address(LIR_Opr array_opr, LIR_Opr index_opr, | |
151 BasicType type, bool needs_card_mark) { | |
152 int offset_in_bytes = arrayOopDesc::base_offset_in_bytes(type); | |
153 | |
154 LIR_Address* addr; | |
155 if (index_opr->is_constant()) { | |
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156 int elem_size = type2aelembytes(type); |
0 | 157 addr = new LIR_Address(array_opr, |
158 offset_in_bytes + index_opr->as_jint() * elem_size, type); | |
159 } else { | |
304 | 160 #ifdef _LP64 |
161 if (index_opr->type() == T_INT) { | |
162 LIR_Opr tmp = new_register(T_LONG); | |
163 __ convert(Bytecodes::_i2l, index_opr, tmp); | |
164 index_opr = tmp; | |
165 } | |
166 #endif // _LP64 | |
0 | 167 addr = new LIR_Address(array_opr, |
168 index_opr, | |
169 LIR_Address::scale(type), | |
170 offset_in_bytes, type); | |
171 } | |
172 if (needs_card_mark) { | |
173 // This store will need a precise card mark, so go ahead and | |
174 // compute the full adddres instead of computing once for the | |
175 // store and again for the card mark. | |
304 | 176 LIR_Opr tmp = new_pointer_register(); |
0 | 177 __ leal(LIR_OprFact::address(addr), tmp); |
1572 | 178 return new LIR_Address(tmp, type); |
0 | 179 } else { |
180 return addr; | |
181 } | |
182 } | |
183 | |
184 | |
185 void LIRGenerator::increment_counter(address counter, int step) { | |
304 | 186 LIR_Opr pointer = new_pointer_register(); |
187 __ move(LIR_OprFact::intptrConst(counter), pointer); | |
1572 | 188 LIR_Address* addr = new LIR_Address(pointer, T_INT); |
0 | 189 increment_counter(addr, step); |
190 } | |
191 | |
192 | |
193 void LIRGenerator::increment_counter(LIR_Address* addr, int step) { | |
194 __ add((LIR_Opr)addr, LIR_OprFact::intConst(step), (LIR_Opr)addr); | |
195 } | |
196 | |
197 | |
198 void LIRGenerator::cmp_mem_int(LIR_Condition condition, LIR_Opr base, int disp, int c, CodeEmitInfo* info) { | |
199 __ cmp_mem_int(condition, base, disp, c, info); | |
200 } | |
201 | |
202 | |
203 void LIRGenerator::cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, int disp, BasicType type, CodeEmitInfo* info) { | |
204 __ cmp_reg_mem(condition, reg, new LIR_Address(base, disp, type), info); | |
205 } | |
206 | |
207 | |
208 void LIRGenerator::cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, LIR_Opr disp, BasicType type, CodeEmitInfo* info) { | |
209 __ cmp_reg_mem(condition, reg, new LIR_Address(base, disp, type), info); | |
210 } | |
211 | |
212 | |
213 bool LIRGenerator::strength_reduce_multiply(LIR_Opr left, int c, LIR_Opr result, LIR_Opr tmp) { | |
214 if (tmp->is_valid()) { | |
215 if (is_power_of_2(c + 1)) { | |
216 __ move(left, tmp); | |
217 __ shift_left(left, log2_intptr(c + 1), left); | |
218 __ sub(left, tmp, result); | |
219 return true; | |
220 } else if (is_power_of_2(c - 1)) { | |
221 __ move(left, tmp); | |
222 __ shift_left(left, log2_intptr(c - 1), left); | |
223 __ add(left, tmp, result); | |
224 return true; | |
225 } | |
226 } | |
227 return false; | |
228 } | |
229 | |
230 | |
231 void LIRGenerator::store_stack_parameter (LIR_Opr item, ByteSize offset_from_sp) { | |
232 BasicType type = item->type(); | |
233 __ store(item, new LIR_Address(FrameMap::rsp_opr, in_bytes(offset_from_sp), type)); | |
234 } | |
235 | |
236 //---------------------------------------------------------------------- | |
237 // visitor functions | |
238 //---------------------------------------------------------------------- | |
239 | |
240 | |
241 void LIRGenerator::do_StoreIndexed(StoreIndexed* x) { | |
242 assert(x->is_root(),""); | |
243 bool needs_range_check = true; | |
244 bool use_length = x->length() != NULL; | |
245 bool obj_store = x->elt_type() == T_ARRAY || x->elt_type() == T_OBJECT; | |
246 bool needs_store_check = obj_store && (x->value()->as_Constant() == NULL || | |
247 !get_jobject_constant(x->value())->is_null_object()); | |
248 | |
249 LIRItem array(x->array(), this); | |
250 LIRItem index(x->index(), this); | |
251 LIRItem value(x->value(), this); | |
252 LIRItem length(this); | |
253 | |
254 array.load_item(); | |
255 index.load_nonconstant(); | |
256 | |
257 if (use_length) { | |
258 needs_range_check = x->compute_needs_range_check(); | |
259 if (needs_range_check) { | |
260 length.set_instruction(x->length()); | |
261 length.load_item(); | |
262 } | |
263 } | |
264 if (needs_store_check) { | |
265 value.load_item(); | |
266 } else { | |
267 value.load_for_store(x->elt_type()); | |
268 } | |
269 | |
270 set_no_result(x); | |
271 | |
272 // the CodeEmitInfo must be duplicated for each different | |
273 // LIR-instruction because spilling can occur anywhere between two | |
274 // instructions and so the debug information must be different | |
275 CodeEmitInfo* range_check_info = state_for(x); | |
276 CodeEmitInfo* null_check_info = NULL; | |
277 if (x->needs_null_check()) { | |
278 null_check_info = new CodeEmitInfo(range_check_info); | |
279 } | |
280 | |
281 // emit array address setup early so it schedules better | |
282 LIR_Address* array_addr = emit_array_address(array.result(), index.result(), x->elt_type(), obj_store); | |
283 | |
284 if (GenerateRangeChecks && needs_range_check) { | |
285 if (use_length) { | |
286 __ cmp(lir_cond_belowEqual, length.result(), index.result()); | |
287 __ branch(lir_cond_belowEqual, T_INT, new RangeCheckStub(range_check_info, index.result())); | |
288 } else { | |
289 array_range_check(array.result(), index.result(), null_check_info, range_check_info); | |
290 // range_check also does the null check | |
291 null_check_info = NULL; | |
292 } | |
293 } | |
294 | |
295 if (GenerateArrayStoreCheck && needs_store_check) { | |
296 LIR_Opr tmp1 = new_register(objectType); | |
297 LIR_Opr tmp2 = new_register(objectType); | |
298 LIR_Opr tmp3 = new_register(objectType); | |
299 | |
300 CodeEmitInfo* store_check_info = new CodeEmitInfo(range_check_info); | |
301 __ store_check(value.result(), array.result(), tmp1, tmp2, tmp3, store_check_info); | |
302 } | |
303 | |
304 if (obj_store) { | |
342
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305 // Needs GC write barriers. |
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306 pre_barrier(LIR_OprFact::address(array_addr), false, NULL); |
0 | 307 __ move(value.result(), array_addr, null_check_info); |
308 // Seems to be a precise | |
309 post_barrier(LIR_OprFact::address(array_addr), value.result()); | |
310 } else { | |
311 __ move(value.result(), array_addr, null_check_info); | |
312 } | |
313 } | |
314 | |
315 | |
316 void LIRGenerator::do_MonitorEnter(MonitorEnter* x) { | |
317 assert(x->is_root(),""); | |
318 LIRItem obj(x->obj(), this); | |
319 obj.load_item(); | |
320 | |
321 set_no_result(x); | |
322 | |
323 // "lock" stores the address of the monitor stack slot, so this is not an oop | |
324 LIR_Opr lock = new_register(T_INT); | |
325 // Need a scratch register for biased locking on x86 | |
326 LIR_Opr scratch = LIR_OprFact::illegalOpr; | |
327 if (UseBiasedLocking) { | |
328 scratch = new_register(T_INT); | |
329 } | |
330 | |
331 CodeEmitInfo* info_for_exception = NULL; | |
332 if (x->needs_null_check()) { | |
333 info_for_exception = state_for(x, x->lock_stack_before()); | |
334 } | |
335 // this CodeEmitInfo must not have the xhandlers because here the | |
336 // object is already locked (xhandlers expect object to be unlocked) | |
337 CodeEmitInfo* info = state_for(x, x->state(), true); | |
338 monitor_enter(obj.result(), lock, syncTempOpr(), scratch, | |
339 x->monitor_no(), info_for_exception, info); | |
340 } | |
341 | |
342 | |
343 void LIRGenerator::do_MonitorExit(MonitorExit* x) { | |
344 assert(x->is_root(),""); | |
345 | |
346 LIRItem obj(x->obj(), this); | |
347 obj.dont_load_item(); | |
348 | |
349 LIR_Opr lock = new_register(T_INT); | |
350 LIR_Opr obj_temp = new_register(T_INT); | |
351 set_no_result(x); | |
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352 monitor_exit(obj_temp, lock, syncTempOpr(), LIR_OprFact::illegalOpr, x->monitor_no()); |
0 | 353 } |
354 | |
355 | |
356 // _ineg, _lneg, _fneg, _dneg | |
357 void LIRGenerator::do_NegateOp(NegateOp* x) { | |
358 LIRItem value(x->x(), this); | |
359 value.set_destroys_register(); | |
360 value.load_item(); | |
361 LIR_Opr reg = rlock(x); | |
362 __ negate(value.result(), reg); | |
363 | |
364 set_result(x, round_item(reg)); | |
365 } | |
366 | |
367 | |
368 // for _fadd, _fmul, _fsub, _fdiv, _frem | |
369 // _dadd, _dmul, _dsub, _ddiv, _drem | |
370 void LIRGenerator::do_ArithmeticOp_FPU(ArithmeticOp* x) { | |
371 LIRItem left(x->x(), this); | |
372 LIRItem right(x->y(), this); | |
373 LIRItem* left_arg = &left; | |
374 LIRItem* right_arg = &right; | |
375 assert(!left.is_stack() || !right.is_stack(), "can't both be memory operands"); | |
376 bool must_load_both = (x->op() == Bytecodes::_frem || x->op() == Bytecodes::_drem); | |
377 if (left.is_register() || x->x()->type()->is_constant() || must_load_both) { | |
378 left.load_item(); | |
379 } else { | |
380 left.dont_load_item(); | |
381 } | |
382 | |
383 // do not load right operand if it is a constant. only 0 and 1 are | |
384 // loaded because there are special instructions for loading them | |
385 // without memory access (not needed for SSE2 instructions) | |
386 bool must_load_right = false; | |
387 if (right.is_constant()) { | |
388 LIR_Const* c = right.result()->as_constant_ptr(); | |
389 assert(c != NULL, "invalid constant"); | |
390 assert(c->type() == T_FLOAT || c->type() == T_DOUBLE, "invalid type"); | |
391 | |
392 if (c->type() == T_FLOAT) { | |
393 must_load_right = UseSSE < 1 && (c->is_one_float() || c->is_zero_float()); | |
394 } else { | |
395 must_load_right = UseSSE < 2 && (c->is_one_double() || c->is_zero_double()); | |
396 } | |
397 } | |
398 | |
399 if (must_load_both) { | |
400 // frem and drem destroy also right operand, so move it to a new register | |
401 right.set_destroys_register(); | |
402 right.load_item(); | |
403 } else if (right.is_register() || must_load_right) { | |
404 right.load_item(); | |
405 } else { | |
406 right.dont_load_item(); | |
407 } | |
408 LIR_Opr reg = rlock(x); | |
409 LIR_Opr tmp = LIR_OprFact::illegalOpr; | |
410 if (x->is_strictfp() && (x->op() == Bytecodes::_dmul || x->op() == Bytecodes::_ddiv)) { | |
411 tmp = new_register(T_DOUBLE); | |
412 } | |
413 | |
414 if ((UseSSE >= 1 && x->op() == Bytecodes::_frem) || (UseSSE >= 2 && x->op() == Bytecodes::_drem)) { | |
415 // special handling for frem and drem: no SSE instruction, so must use FPU with temporary fpu stack slots | |
416 LIR_Opr fpu0, fpu1; | |
417 if (x->op() == Bytecodes::_frem) { | |
418 fpu0 = LIR_OprFact::single_fpu(0); | |
419 fpu1 = LIR_OprFact::single_fpu(1); | |
420 } else { | |
421 fpu0 = LIR_OprFact::double_fpu(0); | |
422 fpu1 = LIR_OprFact::double_fpu(1); | |
423 } | |
424 __ move(right.result(), fpu1); // order of left and right operand is important! | |
425 __ move(left.result(), fpu0); | |
426 __ rem (fpu0, fpu1, fpu0); | |
427 __ move(fpu0, reg); | |
428 | |
429 } else { | |
430 arithmetic_op_fpu(x->op(), reg, left.result(), right.result(), x->is_strictfp(), tmp); | |
431 } | |
432 | |
433 set_result(x, round_item(reg)); | |
434 } | |
435 | |
436 | |
437 // for _ladd, _lmul, _lsub, _ldiv, _lrem | |
438 void LIRGenerator::do_ArithmeticOp_Long(ArithmeticOp* x) { | |
439 if (x->op() == Bytecodes::_ldiv || x->op() == Bytecodes::_lrem ) { | |
440 // long division is implemented as a direct call into the runtime | |
441 LIRItem left(x->x(), this); | |
442 LIRItem right(x->y(), this); | |
443 | |
444 // the check for division by zero destroys the right operand | |
445 right.set_destroys_register(); | |
446 | |
447 BasicTypeList signature(2); | |
448 signature.append(T_LONG); | |
449 signature.append(T_LONG); | |
450 CallingConvention* cc = frame_map()->c_calling_convention(&signature); | |
451 | |
452 // check for division by zero (destroys registers of right operand!) | |
453 CodeEmitInfo* info = state_for(x); | |
454 | |
455 const LIR_Opr result_reg = result_register_for(x->type()); | |
456 left.load_item_force(cc->at(1)); | |
457 right.load_item(); | |
458 | |
459 __ move(right.result(), cc->at(0)); | |
460 | |
461 __ cmp(lir_cond_equal, right.result(), LIR_OprFact::longConst(0)); | |
462 __ branch(lir_cond_equal, T_LONG, new DivByZeroStub(info)); | |
463 | |
464 address entry; | |
465 switch (x->op()) { | |
466 case Bytecodes::_lrem: | |
467 entry = CAST_FROM_FN_PTR(address, SharedRuntime::lrem); | |
468 break; // check if dividend is 0 is done elsewhere | |
469 case Bytecodes::_ldiv: | |
470 entry = CAST_FROM_FN_PTR(address, SharedRuntime::ldiv); | |
471 break; // check if dividend is 0 is done elsewhere | |
472 case Bytecodes::_lmul: | |
473 entry = CAST_FROM_FN_PTR(address, SharedRuntime::lmul); | |
474 break; | |
475 default: | |
476 ShouldNotReachHere(); | |
477 } | |
478 | |
479 LIR_Opr result = rlock_result(x); | |
480 __ call_runtime_leaf(entry, getThreadTemp(), result_reg, cc->args()); | |
481 __ move(result_reg, result); | |
482 } else if (x->op() == Bytecodes::_lmul) { | |
483 // missing test if instr is commutative and if we should swap | |
484 LIRItem left(x->x(), this); | |
485 LIRItem right(x->y(), this); | |
486 | |
487 // right register is destroyed by the long mul, so it must be | |
488 // copied to a new register. | |
489 right.set_destroys_register(); | |
490 | |
491 left.load_item(); | |
492 right.load_item(); | |
493 | |
304 | 494 LIR_Opr reg = FrameMap::long0_opr; |
0 | 495 arithmetic_op_long(x->op(), reg, left.result(), right.result(), NULL); |
496 LIR_Opr result = rlock_result(x); | |
497 __ move(reg, result); | |
498 } else { | |
499 // missing test if instr is commutative and if we should swap | |
500 LIRItem left(x->x(), this); | |
501 LIRItem right(x->y(), this); | |
502 | |
503 left.load_item(); | |
605 | 504 // don't load constants to save register |
0 | 505 right.load_nonconstant(); |
506 rlock_result(x); | |
507 arithmetic_op_long(x->op(), x->operand(), left.result(), right.result(), NULL); | |
508 } | |
509 } | |
510 | |
511 | |
512 | |
513 // for: _iadd, _imul, _isub, _idiv, _irem | |
514 void LIRGenerator::do_ArithmeticOp_Int(ArithmeticOp* x) { | |
515 if (x->op() == Bytecodes::_idiv || x->op() == Bytecodes::_irem) { | |
516 // The requirements for division and modulo | |
517 // input : rax,: dividend min_int | |
518 // reg: divisor (may not be rax,/rdx) -1 | |
519 // | |
520 // output: rax,: quotient (= rax, idiv reg) min_int | |
521 // rdx: remainder (= rax, irem reg) 0 | |
522 | |
523 // rax, and rdx will be destroyed | |
524 | |
525 // Note: does this invalidate the spec ??? | |
526 LIRItem right(x->y(), this); | |
527 LIRItem left(x->x() , this); // visit left second, so that the is_register test is valid | |
528 | |
529 // call state_for before load_item_force because state_for may | |
530 // force the evaluation of other instructions that are needed for | |
531 // correct debug info. Otherwise the live range of the fix | |
532 // register might be too long. | |
533 CodeEmitInfo* info = state_for(x); | |
534 | |
535 left.load_item_force(divInOpr()); | |
536 | |
537 right.load_item(); | |
538 | |
539 LIR_Opr result = rlock_result(x); | |
540 LIR_Opr result_reg; | |
541 if (x->op() == Bytecodes::_idiv) { | |
542 result_reg = divOutOpr(); | |
543 } else { | |
544 result_reg = remOutOpr(); | |
545 } | |
546 | |
547 if (!ImplicitDiv0Checks) { | |
548 __ cmp(lir_cond_equal, right.result(), LIR_OprFact::intConst(0)); | |
549 __ branch(lir_cond_equal, T_INT, new DivByZeroStub(info)); | |
550 } | |
551 LIR_Opr tmp = FrameMap::rdx_opr; // idiv and irem use rdx in their implementation | |
552 if (x->op() == Bytecodes::_irem) { | |
553 __ irem(left.result(), right.result(), result_reg, tmp, info); | |
554 } else if (x->op() == Bytecodes::_idiv) { | |
555 __ idiv(left.result(), right.result(), result_reg, tmp, info); | |
556 } else { | |
557 ShouldNotReachHere(); | |
558 } | |
559 | |
560 __ move(result_reg, result); | |
561 } else { | |
562 // missing test if instr is commutative and if we should swap | |
563 LIRItem left(x->x(), this); | |
564 LIRItem right(x->y(), this); | |
565 LIRItem* left_arg = &left; | |
566 LIRItem* right_arg = &right; | |
567 if (x->is_commutative() && left.is_stack() && right.is_register()) { | |
568 // swap them if left is real stack (or cached) and right is real register(not cached) | |
569 left_arg = &right; | |
570 right_arg = &left; | |
571 } | |
572 | |
573 left_arg->load_item(); | |
574 | |
575 // do not need to load right, as we can handle stack and constants | |
576 if (x->op() == Bytecodes::_imul ) { | |
577 // check if we can use shift instead | |
578 bool use_constant = false; | |
579 bool use_tmp = false; | |
580 if (right_arg->is_constant()) { | |
581 int iconst = right_arg->get_jint_constant(); | |
582 if (iconst > 0) { | |
583 if (is_power_of_2(iconst)) { | |
584 use_constant = true; | |
585 } else if (is_power_of_2(iconst - 1) || is_power_of_2(iconst + 1)) { | |
586 use_constant = true; | |
587 use_tmp = true; | |
588 } | |
589 } | |
590 } | |
591 if (use_constant) { | |
592 right_arg->dont_load_item(); | |
593 } else { | |
594 right_arg->load_item(); | |
595 } | |
596 LIR_Opr tmp = LIR_OprFact::illegalOpr; | |
597 if (use_tmp) { | |
598 tmp = new_register(T_INT); | |
599 } | |
600 rlock_result(x); | |
601 | |
602 arithmetic_op_int(x->op(), x->operand(), left_arg->result(), right_arg->result(), tmp); | |
603 } else { | |
604 right_arg->dont_load_item(); | |
605 rlock_result(x); | |
606 LIR_Opr tmp = LIR_OprFact::illegalOpr; | |
607 arithmetic_op_int(x->op(), x->operand(), left_arg->result(), right_arg->result(), tmp); | |
608 } | |
609 } | |
610 } | |
611 | |
612 | |
613 void LIRGenerator::do_ArithmeticOp(ArithmeticOp* x) { | |
614 // when an operand with use count 1 is the left operand, then it is | |
615 // likely that no move for 2-operand-LIR-form is necessary | |
616 if (x->is_commutative() && x->y()->as_Constant() == NULL && x->x()->use_count() > x->y()->use_count()) { | |
617 x->swap_operands(); | |
618 } | |
619 | |
620 ValueTag tag = x->type()->tag(); | |
621 assert(x->x()->type()->tag() == tag && x->y()->type()->tag() == tag, "wrong parameters"); | |
622 switch (tag) { | |
623 case floatTag: | |
624 case doubleTag: do_ArithmeticOp_FPU(x); return; | |
625 case longTag: do_ArithmeticOp_Long(x); return; | |
626 case intTag: do_ArithmeticOp_Int(x); return; | |
627 } | |
628 ShouldNotReachHere(); | |
629 } | |
630 | |
631 | |
632 // _ishl, _lshl, _ishr, _lshr, _iushr, _lushr | |
633 void LIRGenerator::do_ShiftOp(ShiftOp* x) { | |
634 // count must always be in rcx | |
635 LIRItem value(x->x(), this); | |
636 LIRItem count(x->y(), this); | |
637 | |
638 ValueTag elemType = x->type()->tag(); | |
639 bool must_load_count = !count.is_constant() || elemType == longTag; | |
640 if (must_load_count) { | |
641 // count for long must be in register | |
642 count.load_item_force(shiftCountOpr()); | |
643 } else { | |
644 count.dont_load_item(); | |
645 } | |
646 value.load_item(); | |
647 LIR_Opr reg = rlock_result(x); | |
648 | |
649 shift_op(x->op(), reg, value.result(), count.result(), LIR_OprFact::illegalOpr); | |
650 } | |
651 | |
652 | |
653 // _iand, _land, _ior, _lor, _ixor, _lxor | |
654 void LIRGenerator::do_LogicOp(LogicOp* x) { | |
655 // when an operand with use count 1 is the left operand, then it is | |
656 // likely that no move for 2-operand-LIR-form is necessary | |
657 if (x->is_commutative() && x->y()->as_Constant() == NULL && x->x()->use_count() > x->y()->use_count()) { | |
658 x->swap_operands(); | |
659 } | |
660 | |
661 LIRItem left(x->x(), this); | |
662 LIRItem right(x->y(), this); | |
663 | |
664 left.load_item(); | |
665 right.load_nonconstant(); | |
666 LIR_Opr reg = rlock_result(x); | |
667 | |
668 logic_op(x->op(), reg, left.result(), right.result()); | |
669 } | |
670 | |
671 | |
672 | |
673 // _lcmp, _fcmpl, _fcmpg, _dcmpl, _dcmpg | |
674 void LIRGenerator::do_CompareOp(CompareOp* x) { | |
675 LIRItem left(x->x(), this); | |
676 LIRItem right(x->y(), this); | |
677 ValueTag tag = x->x()->type()->tag(); | |
678 if (tag == longTag) { | |
679 left.set_destroys_register(); | |
680 } | |
681 left.load_item(); | |
682 right.load_item(); | |
683 LIR_Opr reg = rlock_result(x); | |
684 | |
685 if (x->x()->type()->is_float_kind()) { | |
686 Bytecodes::Code code = x->op(); | |
687 __ fcmp2int(left.result(), right.result(), reg, (code == Bytecodes::_fcmpl || code == Bytecodes::_dcmpl)); | |
688 } else if (x->x()->type()->tag() == longTag) { | |
689 __ lcmp2int(left.result(), right.result(), reg); | |
690 } else { | |
691 Unimplemented(); | |
692 } | |
693 } | |
694 | |
695 | |
696 void LIRGenerator::do_AttemptUpdate(Intrinsic* x) { | |
697 assert(x->number_of_arguments() == 3, "wrong type"); | |
698 LIRItem obj (x->argument_at(0), this); // AtomicLong object | |
699 LIRItem cmp_value (x->argument_at(1), this); // value to compare with field | |
700 LIRItem new_value (x->argument_at(2), this); // replace field with new_value if it matches cmp_value | |
701 | |
702 // compare value must be in rdx,eax (hi,lo); may be destroyed by cmpxchg8 instruction | |
304 | 703 cmp_value.load_item_force(FrameMap::long0_opr); |
0 | 704 |
705 // new value must be in rcx,ebx (hi,lo) | |
304 | 706 new_value.load_item_force(FrameMap::long1_opr); |
0 | 707 |
708 // object pointer register is overwritten with field address | |
709 obj.load_item(); | |
710 | |
711 // generate compare-and-swap; produces zero condition if swap occurs | |
712 int value_offset = sun_misc_AtomicLongCSImpl::value_offset(); | |
713 LIR_Opr addr = obj.result(); | |
714 __ add(addr, LIR_OprFact::intConst(value_offset), addr); | |
715 LIR_Opr t1 = LIR_OprFact::illegalOpr; // no temp needed | |
716 LIR_Opr t2 = LIR_OprFact::illegalOpr; // no temp needed | |
717 __ cas_long(addr, cmp_value.result(), new_value.result(), t1, t2); | |
718 | |
719 // generate conditional move of boolean result | |
720 LIR_Opr result = rlock_result(x); | |
721 __ cmove(lir_cond_equal, LIR_OprFact::intConst(1), LIR_OprFact::intConst(0), result); | |
722 } | |
723 | |
724 | |
725 void LIRGenerator::do_CompareAndSwap(Intrinsic* x, ValueType* type) { | |
726 assert(x->number_of_arguments() == 4, "wrong type"); | |
727 LIRItem obj (x->argument_at(0), this); // object | |
728 LIRItem offset(x->argument_at(1), this); // offset of field | |
729 LIRItem cmp (x->argument_at(2), this); // value to compare with field | |
730 LIRItem val (x->argument_at(3), this); // replace field with val if matches cmp | |
731 | |
732 assert(obj.type()->tag() == objectTag, "invalid type"); | |
304 | 733 |
734 // In 64bit the type can be long, sparc doesn't have this assert | |
735 // assert(offset.type()->tag() == intTag, "invalid type"); | |
736 | |
0 | 737 assert(cmp.type()->tag() == type->tag(), "invalid type"); |
738 assert(val.type()->tag() == type->tag(), "invalid type"); | |
739 | |
740 // get address of field | |
741 obj.load_item(); | |
742 offset.load_nonconstant(); | |
743 | |
744 if (type == objectType) { | |
745 cmp.load_item_force(FrameMap::rax_oop_opr); | |
746 val.load_item(); | |
747 } else if (type == intType) { | |
748 cmp.load_item_force(FrameMap::rax_opr); | |
749 val.load_item(); | |
750 } else if (type == longType) { | |
304 | 751 cmp.load_item_force(FrameMap::long0_opr); |
752 val.load_item_force(FrameMap::long1_opr); | |
0 | 753 } else { |
754 ShouldNotReachHere(); | |
755 } | |
756 | |
757 LIR_Opr addr = new_pointer_register(); | |
1060 | 758 LIR_Address* a; |
759 if(offset.result()->is_constant()) { | |
760 a = new LIR_Address(obj.result(), | |
761 NOT_LP64(offset.result()->as_constant_ptr()->as_jint()) LP64_ONLY((int)offset.result()->as_constant_ptr()->as_jlong()), | |
762 as_BasicType(type)); | |
763 } else { | |
764 a = new LIR_Address(obj.result(), | |
765 offset.result(), | |
766 LIR_Address::times_1, | |
767 0, | |
768 as_BasicType(type)); | |
769 } | |
770 __ leal(LIR_OprFact::address(a), addr); | |
0 | 771 |
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772 if (type == objectType) { // Write-barrier needed for Object fields. |
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773 // Do the pre-write barrier, if any. |
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774 pre_barrier(addr, false, NULL); |
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775 } |
0 | 776 |
777 LIR_Opr ill = LIR_OprFact::illegalOpr; // for convenience | |
778 if (type == objectType) | |
779 __ cas_obj(addr, cmp.result(), val.result(), ill, ill); | |
780 else if (type == intType) | |
781 __ cas_int(addr, cmp.result(), val.result(), ill, ill); | |
782 else if (type == longType) | |
783 __ cas_long(addr, cmp.result(), val.result(), ill, ill); | |
784 else { | |
785 ShouldNotReachHere(); | |
786 } | |
787 | |
788 // generate conditional move of boolean result | |
789 LIR_Opr result = rlock_result(x); | |
790 __ cmove(lir_cond_equal, LIR_OprFact::intConst(1), LIR_OprFact::intConst(0), result); | |
791 if (type == objectType) { // Write-barrier needed for Object fields. | |
792 // Seems to be precise | |
793 post_barrier(addr, val.result()); | |
794 } | |
795 } | |
796 | |
797 | |
798 void LIRGenerator::do_MathIntrinsic(Intrinsic* x) { | |
799 assert(x->number_of_arguments() == 1, "wrong type"); | |
800 LIRItem value(x->argument_at(0), this); | |
801 | |
802 bool use_fpu = false; | |
803 if (UseSSE >= 2) { | |
804 switch(x->id()) { | |
805 case vmIntrinsics::_dsin: | |
806 case vmIntrinsics::_dcos: | |
807 case vmIntrinsics::_dtan: | |
808 case vmIntrinsics::_dlog: | |
809 case vmIntrinsics::_dlog10: | |
810 use_fpu = true; | |
811 } | |
812 } else { | |
813 value.set_destroys_register(); | |
814 } | |
815 | |
816 value.load_item(); | |
817 | |
818 LIR_Opr calc_input = value.result(); | |
819 LIR_Opr calc_result = rlock_result(x); | |
820 | |
821 // sin and cos need two free fpu stack slots, so register two temporary operands | |
822 LIR_Opr tmp1 = FrameMap::caller_save_fpu_reg_at(0); | |
823 LIR_Opr tmp2 = FrameMap::caller_save_fpu_reg_at(1); | |
824 | |
825 if (use_fpu) { | |
826 LIR_Opr tmp = FrameMap::fpu0_double_opr; | |
827 __ move(calc_input, tmp); | |
828 | |
829 calc_input = tmp; | |
830 calc_result = tmp; | |
831 tmp1 = FrameMap::caller_save_fpu_reg_at(1); | |
832 tmp2 = FrameMap::caller_save_fpu_reg_at(2); | |
833 } | |
834 | |
835 switch(x->id()) { | |
836 case vmIntrinsics::_dabs: __ abs (calc_input, calc_result, LIR_OprFact::illegalOpr); break; | |
837 case vmIntrinsics::_dsqrt: __ sqrt (calc_input, calc_result, LIR_OprFact::illegalOpr); break; | |
838 case vmIntrinsics::_dsin: __ sin (calc_input, calc_result, tmp1, tmp2); break; | |
839 case vmIntrinsics::_dcos: __ cos (calc_input, calc_result, tmp1, tmp2); break; | |
840 case vmIntrinsics::_dtan: __ tan (calc_input, calc_result, tmp1, tmp2); break; | |
953
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841 case vmIntrinsics::_dlog: __ log (calc_input, calc_result, tmp1); break; |
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842 case vmIntrinsics::_dlog10: __ log10(calc_input, calc_result, tmp1); break; |
0 | 843 default: ShouldNotReachHere(); |
844 } | |
845 | |
846 if (use_fpu) { | |
847 __ move(calc_result, x->operand()); | |
848 } | |
849 } | |
850 | |
851 | |
852 void LIRGenerator::do_ArrayCopy(Intrinsic* x) { | |
853 assert(x->number_of_arguments() == 5, "wrong type"); | |
854 LIRItem src(x->argument_at(0), this); | |
855 LIRItem src_pos(x->argument_at(1), this); | |
856 LIRItem dst(x->argument_at(2), this); | |
857 LIRItem dst_pos(x->argument_at(3), this); | |
858 LIRItem length(x->argument_at(4), this); | |
859 | |
860 // operands for arraycopy must use fixed registers, otherwise | |
861 // LinearScan will fail allocation (because arraycopy always needs a | |
862 // call) | |
304 | 863 |
864 #ifndef _LP64 | |
0 | 865 src.load_item_force (FrameMap::rcx_oop_opr); |
866 src_pos.load_item_force (FrameMap::rdx_opr); | |
867 dst.load_item_force (FrameMap::rax_oop_opr); | |
868 dst_pos.load_item_force (FrameMap::rbx_opr); | |
869 length.load_item_force (FrameMap::rdi_opr); | |
870 LIR_Opr tmp = (FrameMap::rsi_opr); | |
304 | 871 #else |
872 | |
873 // The java calling convention will give us enough registers | |
874 // so that on the stub side the args will be perfect already. | |
875 // On the other slow/special case side we call C and the arg | |
876 // positions are not similar enough to pick one as the best. | |
877 // Also because the java calling convention is a "shifted" version | |
878 // of the C convention we can process the java args trivially into C | |
879 // args without worry of overwriting during the xfer | |
880 | |
881 src.load_item_force (FrameMap::as_oop_opr(j_rarg0)); | |
882 src_pos.load_item_force (FrameMap::as_opr(j_rarg1)); | |
883 dst.load_item_force (FrameMap::as_oop_opr(j_rarg2)); | |
884 dst_pos.load_item_force (FrameMap::as_opr(j_rarg3)); | |
885 length.load_item_force (FrameMap::as_opr(j_rarg4)); | |
886 | |
887 LIR_Opr tmp = FrameMap::as_opr(j_rarg5); | |
888 #endif // LP64 | |
889 | |
0 | 890 set_no_result(x); |
891 | |
892 int flags; | |
893 ciArrayKlass* expected_type; | |
894 arraycopy_helper(x, &flags, &expected_type); | |
895 | |
896 CodeEmitInfo* info = state_for(x, x->state()); // we may want to have stack (deoptimization?) | |
897 __ arraycopy(src.result(), src_pos.result(), dst.result(), dst_pos.result(), length.result(), tmp, expected_type, flags, info); // does add_safepoint | |
898 } | |
899 | |
900 | |
901 // _i2l, _i2f, _i2d, _l2i, _l2f, _l2d, _f2i, _f2l, _f2d, _d2i, _d2l, _d2f | |
902 // _i2b, _i2c, _i2s | |
903 LIR_Opr fixed_register_for(BasicType type) { | |
904 switch (type) { | |
905 case T_FLOAT: return FrameMap::fpu0_float_opr; | |
906 case T_DOUBLE: return FrameMap::fpu0_double_opr; | |
907 case T_INT: return FrameMap::rax_opr; | |
304 | 908 case T_LONG: return FrameMap::long0_opr; |
0 | 909 default: ShouldNotReachHere(); return LIR_OprFact::illegalOpr; |
910 } | |
911 } | |
912 | |
913 void LIRGenerator::do_Convert(Convert* x) { | |
914 // flags that vary for the different operations and different SSE-settings | |
915 bool fixed_input, fixed_result, round_result, needs_stub; | |
916 | |
917 switch (x->op()) { | |
918 case Bytecodes::_i2l: // fall through | |
919 case Bytecodes::_l2i: // fall through | |
920 case Bytecodes::_i2b: // fall through | |
921 case Bytecodes::_i2c: // fall through | |
922 case Bytecodes::_i2s: fixed_input = false; fixed_result = false; round_result = false; needs_stub = false; break; | |
923 | |
924 case Bytecodes::_f2d: fixed_input = UseSSE == 1; fixed_result = false; round_result = false; needs_stub = false; break; | |
925 case Bytecodes::_d2f: fixed_input = false; fixed_result = UseSSE == 1; round_result = UseSSE < 1; needs_stub = false; break; | |
926 case Bytecodes::_i2f: fixed_input = false; fixed_result = false; round_result = UseSSE < 1; needs_stub = false; break; | |
927 case Bytecodes::_i2d: fixed_input = false; fixed_result = false; round_result = false; needs_stub = false; break; | |
928 case Bytecodes::_f2i: fixed_input = false; fixed_result = false; round_result = false; needs_stub = true; break; | |
929 case Bytecodes::_d2i: fixed_input = false; fixed_result = false; round_result = false; needs_stub = true; break; | |
930 case Bytecodes::_l2f: fixed_input = false; fixed_result = UseSSE >= 1; round_result = UseSSE < 1; needs_stub = false; break; | |
931 case Bytecodes::_l2d: fixed_input = false; fixed_result = UseSSE >= 2; round_result = UseSSE < 2; needs_stub = false; break; | |
932 case Bytecodes::_f2l: fixed_input = true; fixed_result = true; round_result = false; needs_stub = false; break; | |
933 case Bytecodes::_d2l: fixed_input = true; fixed_result = true; round_result = false; needs_stub = false; break; | |
934 default: ShouldNotReachHere(); | |
935 } | |
936 | |
937 LIRItem value(x->value(), this); | |
938 value.load_item(); | |
939 LIR_Opr input = value.result(); | |
940 LIR_Opr result = rlock(x); | |
941 | |
942 // arguments of lir_convert | |
943 LIR_Opr conv_input = input; | |
944 LIR_Opr conv_result = result; | |
945 ConversionStub* stub = NULL; | |
946 | |
947 if (fixed_input) { | |
948 conv_input = fixed_register_for(input->type()); | |
949 __ move(input, conv_input); | |
950 } | |
951 | |
952 assert(fixed_result == false || round_result == false, "cannot set both"); | |
953 if (fixed_result) { | |
954 conv_result = fixed_register_for(result->type()); | |
955 } else if (round_result) { | |
956 result = new_register(result->type()); | |
957 set_vreg_flag(result, must_start_in_memory); | |
958 } | |
959 | |
960 if (needs_stub) { | |
961 stub = new ConversionStub(x->op(), conv_input, conv_result); | |
962 } | |
963 | |
964 __ convert(x->op(), conv_input, conv_result, stub); | |
965 | |
966 if (result != conv_result) { | |
967 __ move(conv_result, result); | |
968 } | |
969 | |
970 assert(result->is_virtual(), "result must be virtual register"); | |
971 set_result(x, result); | |
972 } | |
973 | |
974 | |
975 void LIRGenerator::do_NewInstance(NewInstance* x) { | |
976 if (PrintNotLoaded && !x->klass()->is_loaded()) { | |
977 tty->print_cr(" ###class not loaded at new bci %d", x->bci()); | |
978 } | |
979 CodeEmitInfo* info = state_for(x, x->state()); | |
980 LIR_Opr reg = result_register_for(x->type()); | |
981 LIR_Opr klass_reg = new_register(objectType); | |
982 new_instance(reg, x->klass(), | |
983 FrameMap::rcx_oop_opr, | |
984 FrameMap::rdi_oop_opr, | |
985 FrameMap::rsi_oop_opr, | |
986 LIR_OprFact::illegalOpr, | |
987 FrameMap::rdx_oop_opr, info); | |
988 LIR_Opr result = rlock_result(x); | |
989 __ move(reg, result); | |
990 } | |
991 | |
992 | |
993 void LIRGenerator::do_NewTypeArray(NewTypeArray* x) { | |
994 CodeEmitInfo* info = state_for(x, x->state()); | |
995 | |
996 LIRItem length(x->length(), this); | |
997 length.load_item_force(FrameMap::rbx_opr); | |
998 | |
999 LIR_Opr reg = result_register_for(x->type()); | |
1000 LIR_Opr tmp1 = FrameMap::rcx_oop_opr; | |
1001 LIR_Opr tmp2 = FrameMap::rsi_oop_opr; | |
1002 LIR_Opr tmp3 = FrameMap::rdi_oop_opr; | |
1003 LIR_Opr tmp4 = reg; | |
1004 LIR_Opr klass_reg = FrameMap::rdx_oop_opr; | |
1005 LIR_Opr len = length.result(); | |
1006 BasicType elem_type = x->elt_type(); | |
1007 | |
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1008 __ oop2reg(ciTypeArrayKlass::make(elem_type)->constant_encoding(), klass_reg); |
0 | 1009 |
1010 CodeStub* slow_path = new NewTypeArrayStub(klass_reg, len, reg, info); | |
1011 __ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4, elem_type, klass_reg, slow_path); | |
1012 | |
1013 LIR_Opr result = rlock_result(x); | |
1014 __ move(reg, result); | |
1015 } | |
1016 | |
1017 | |
1018 void LIRGenerator::do_NewObjectArray(NewObjectArray* x) { | |
1019 LIRItem length(x->length(), this); | |
1020 // in case of patching (i.e., object class is not yet loaded), we need to reexecute the instruction | |
1021 // and therefore provide the state before the parameters have been consumed | |
1022 CodeEmitInfo* patching_info = NULL; | |
1023 if (!x->klass()->is_loaded() || PatchALot) { | |
1024 patching_info = state_for(x, x->state_before()); | |
1025 } | |
1026 | |
1027 CodeEmitInfo* info = state_for(x, x->state()); | |
1028 | |
1029 const LIR_Opr reg = result_register_for(x->type()); | |
1030 LIR_Opr tmp1 = FrameMap::rcx_oop_opr; | |
1031 LIR_Opr tmp2 = FrameMap::rsi_oop_opr; | |
1032 LIR_Opr tmp3 = FrameMap::rdi_oop_opr; | |
1033 LIR_Opr tmp4 = reg; | |
1034 LIR_Opr klass_reg = FrameMap::rdx_oop_opr; | |
1035 | |
1036 length.load_item_force(FrameMap::rbx_opr); | |
1037 LIR_Opr len = length.result(); | |
1038 | |
1039 CodeStub* slow_path = new NewObjectArrayStub(klass_reg, len, reg, info); | |
1040 ciObject* obj = (ciObject*) ciObjArrayKlass::make(x->klass()); | |
1041 if (obj == ciEnv::unloaded_ciobjarrayklass()) { | |
1042 BAILOUT("encountered unloaded_ciobjarrayklass due to out of memory error"); | |
1043 } | |
1044 jobject2reg_with_patching(klass_reg, obj, patching_info); | |
1045 __ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4, T_OBJECT, klass_reg, slow_path); | |
1046 | |
1047 LIR_Opr result = rlock_result(x); | |
1048 __ move(reg, result); | |
1049 } | |
1050 | |
1051 | |
1052 void LIRGenerator::do_NewMultiArray(NewMultiArray* x) { | |
1053 Values* dims = x->dims(); | |
1054 int i = dims->length(); | |
1055 LIRItemList* items = new LIRItemList(dims->length(), NULL); | |
1056 while (i-- > 0) { | |
1057 LIRItem* size = new LIRItem(dims->at(i), this); | |
1058 items->at_put(i, size); | |
1059 } | |
1060 | |
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1061 // Evaluate state_for early since it may emit code. |
0 | 1062 CodeEmitInfo* patching_info = NULL; |
1063 if (!x->klass()->is_loaded() || PatchALot) { | |
1064 patching_info = state_for(x, x->state_before()); | |
1065 | |
1066 // cannot re-use same xhandlers for multiple CodeEmitInfos, so | |
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1067 // clone all handlers. This is handled transparently in other |
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1068 // places by the CodeEmitInfo cloning logic but is handled |
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1069 // specially here because a stub isn't being used. |
0 | 1070 x->set_exception_handlers(new XHandlers(x->exception_handlers())); |
1071 } | |
1072 CodeEmitInfo* info = state_for(x, x->state()); | |
1073 | |
1074 i = dims->length(); | |
1075 while (i-- > 0) { | |
1076 LIRItem* size = items->at(i); | |
1077 size->load_nonconstant(); | |
1078 | |
1079 store_stack_parameter(size->result(), in_ByteSize(i*4)); | |
1080 } | |
1081 | |
1082 LIR_Opr reg = result_register_for(x->type()); | |
1083 jobject2reg_with_patching(reg, x->klass(), patching_info); | |
1084 | |
1085 LIR_Opr rank = FrameMap::rbx_opr; | |
1086 __ move(LIR_OprFact::intConst(x->rank()), rank); | |
1087 LIR_Opr varargs = FrameMap::rcx_opr; | |
1088 __ move(FrameMap::rsp_opr, varargs); | |
1089 LIR_OprList* args = new LIR_OprList(3); | |
1090 args->append(reg); | |
1091 args->append(rank); | |
1092 args->append(varargs); | |
1093 __ call_runtime(Runtime1::entry_for(Runtime1::new_multi_array_id), | |
1094 LIR_OprFact::illegalOpr, | |
1095 reg, args, info); | |
1096 | |
1097 LIR_Opr result = rlock_result(x); | |
1098 __ move(reg, result); | |
1099 } | |
1100 | |
1101 | |
1102 void LIRGenerator::do_BlockBegin(BlockBegin* x) { | |
1103 // nothing to do for now | |
1104 } | |
1105 | |
1106 | |
1107 void LIRGenerator::do_CheckCast(CheckCast* x) { | |
1108 LIRItem obj(x->obj(), this); | |
1109 | |
1110 CodeEmitInfo* patching_info = NULL; | |
1111 if (!x->klass()->is_loaded() || (PatchALot && !x->is_incompatible_class_change_check())) { | |
1112 // must do this before locking the destination register as an oop register, | |
1113 // and before the obj is loaded (the latter is for deoptimization) | |
1114 patching_info = state_for(x, x->state_before()); | |
1115 } | |
1116 obj.load_item(); | |
1117 | |
1118 // info for exceptions | |
1119 CodeEmitInfo* info_for_exception = state_for(x, x->state()->copy_locks()); | |
1120 | |
1121 CodeStub* stub; | |
1122 if (x->is_incompatible_class_change_check()) { | |
1123 assert(patching_info == NULL, "can't patch this"); | |
1124 stub = new SimpleExceptionStub(Runtime1::throw_incompatible_class_change_error_id, LIR_OprFact::illegalOpr, info_for_exception); | |
1125 } else { | |
1126 stub = new SimpleExceptionStub(Runtime1::throw_class_cast_exception_id, obj.result(), info_for_exception); | |
1127 } | |
1128 LIR_Opr reg = rlock_result(x); | |
1129 __ checkcast(reg, obj.result(), x->klass(), | |
1130 new_register(objectType), new_register(objectType), | |
1131 !x->klass()->is_loaded() ? new_register(objectType) : LIR_OprFact::illegalOpr, | |
1132 x->direct_compare(), info_for_exception, patching_info, stub, | |
1133 x->profiled_method(), x->profiled_bci()); | |
1134 } | |
1135 | |
1136 | |
1137 void LIRGenerator::do_InstanceOf(InstanceOf* x) { | |
1138 LIRItem obj(x->obj(), this); | |
1139 | |
1140 // result and test object may not be in same register | |
1141 LIR_Opr reg = rlock_result(x); | |
1142 CodeEmitInfo* patching_info = NULL; | |
1143 if ((!x->klass()->is_loaded() || PatchALot)) { | |
1144 // must do this before locking the destination register as an oop register | |
1145 patching_info = state_for(x, x->state_before()); | |
1146 } | |
1147 obj.load_item(); | |
1148 LIR_Opr tmp = new_register(objectType); | |
1149 __ instanceof(reg, obj.result(), x->klass(), | |
1150 tmp, new_register(objectType), LIR_OprFact::illegalOpr, | |
1151 x->direct_compare(), patching_info); | |
1152 } | |
1153 | |
1154 | |
1155 void LIRGenerator::do_If(If* x) { | |
1156 assert(x->number_of_sux() == 2, "inconsistency"); | |
1157 ValueTag tag = x->x()->type()->tag(); | |
1158 bool is_safepoint = x->is_safepoint(); | |
1159 | |
1160 If::Condition cond = x->cond(); | |
1161 | |
1162 LIRItem xitem(x->x(), this); | |
1163 LIRItem yitem(x->y(), this); | |
1164 LIRItem* xin = &xitem; | |
1165 LIRItem* yin = &yitem; | |
1166 | |
1167 if (tag == longTag) { | |
1168 // for longs, only conditions "eql", "neq", "lss", "geq" are valid; | |
1169 // mirror for other conditions | |
1170 if (cond == If::gtr || cond == If::leq) { | |
1171 cond = Instruction::mirror(cond); | |
1172 xin = &yitem; | |
1173 yin = &xitem; | |
1174 } | |
1175 xin->set_destroys_register(); | |
1176 } | |
1177 xin->load_item(); | |
1178 if (tag == longTag && yin->is_constant() && yin->get_jlong_constant() == 0 && (cond == If::eql || cond == If::neq)) { | |
1179 // inline long zero | |
1180 yin->dont_load_item(); | |
1181 } else if (tag == longTag || tag == floatTag || tag == doubleTag) { | |
1182 // longs cannot handle constants at right side | |
1183 yin->load_item(); | |
1184 } else { | |
1185 yin->dont_load_item(); | |
1186 } | |
1187 | |
1188 // add safepoint before generating condition code so it can be recomputed | |
1189 if (x->is_safepoint()) { | |
1190 // increment backedge counter if needed | |
1191 increment_backedge_counter(state_for(x, x->state_before())); | |
1192 | |
1193 __ safepoint(LIR_OprFact::illegalOpr, state_for(x, x->state_before())); | |
1194 } | |
1195 set_no_result(x); | |
1196 | |
1197 LIR_Opr left = xin->result(); | |
1198 LIR_Opr right = yin->result(); | |
1199 __ cmp(lir_cond(cond), left, right); | |
1200 profile_branch(x, cond); | |
1201 move_to_phi(x->state()); | |
1202 if (x->x()->type()->is_float_kind()) { | |
1203 __ branch(lir_cond(cond), right->type(), x->tsux(), x->usux()); | |
1204 } else { | |
1205 __ branch(lir_cond(cond), right->type(), x->tsux()); | |
1206 } | |
1207 assert(x->default_sux() == x->fsux(), "wrong destination above"); | |
1208 __ jump(x->default_sux()); | |
1209 } | |
1210 | |
1211 | |
1212 LIR_Opr LIRGenerator::getThreadPointer() { | |
304 | 1213 #ifdef _LP64 |
1214 return FrameMap::as_pointer_opr(r15_thread); | |
1215 #else | |
0 | 1216 LIR_Opr result = new_register(T_INT); |
1217 __ get_thread(result); | |
1218 return result; | |
304 | 1219 #endif // |
0 | 1220 } |
1221 | |
1222 void LIRGenerator::trace_block_entry(BlockBegin* block) { | |
1223 store_stack_parameter(LIR_OprFact::intConst(block->block_id()), in_ByteSize(0)); | |
1224 LIR_OprList* args = new LIR_OprList(); | |
1225 address func = CAST_FROM_FN_PTR(address, Runtime1::trace_block_entry); | |
1226 __ call_runtime_leaf(func, LIR_OprFact::illegalOpr, LIR_OprFact::illegalOpr, args); | |
1227 } | |
1228 | |
1229 | |
1230 void LIRGenerator::volatile_field_store(LIR_Opr value, LIR_Address* address, | |
1231 CodeEmitInfo* info) { | |
1232 if (address->type() == T_LONG) { | |
1233 address = new LIR_Address(address->base(), | |
1234 address->index(), address->scale(), | |
1235 address->disp(), T_DOUBLE); | |
1236 // Transfer the value atomically by using FP moves. This means | |
1237 // the value has to be moved between CPU and FPU registers. It | |
1238 // always has to be moved through spill slot since there's no | |
1239 // quick way to pack the value into an SSE register. | |
1240 LIR_Opr temp_double = new_register(T_DOUBLE); | |
1241 LIR_Opr spill = new_register(T_LONG); | |
1242 set_vreg_flag(spill, must_start_in_memory); | |
1243 __ move(value, spill); | |
1244 __ volatile_move(spill, temp_double, T_LONG); | |
1245 __ volatile_move(temp_double, LIR_OprFact::address(address), T_LONG, info); | |
1246 } else { | |
1247 __ store(value, address, info); | |
1248 } | |
1249 } | |
1250 | |
1251 | |
1252 | |
1253 void LIRGenerator::volatile_field_load(LIR_Address* address, LIR_Opr result, | |
1254 CodeEmitInfo* info) { | |
1255 if (address->type() == T_LONG) { | |
1256 address = new LIR_Address(address->base(), | |
1257 address->index(), address->scale(), | |
1258 address->disp(), T_DOUBLE); | |
1259 // Transfer the value atomically by using FP moves. This means | |
1260 // the value has to be moved between CPU and FPU registers. In | |
1261 // SSE0 and SSE1 mode it has to be moved through spill slot but in | |
1262 // SSE2+ mode it can be moved directly. | |
1263 LIR_Opr temp_double = new_register(T_DOUBLE); | |
1264 __ volatile_move(LIR_OprFact::address(address), temp_double, T_LONG, info); | |
1265 __ volatile_move(temp_double, result, T_LONG); | |
1266 if (UseSSE < 2) { | |
1267 // no spill slot needed in SSE2 mode because xmm->cpu register move is possible | |
1268 set_vreg_flag(result, must_start_in_memory); | |
1269 } | |
1270 } else { | |
1271 __ load(address, result, info); | |
1272 } | |
1273 } | |
1274 | |
1275 void LIRGenerator::get_Object_unsafe(LIR_Opr dst, LIR_Opr src, LIR_Opr offset, | |
1276 BasicType type, bool is_volatile) { | |
1277 if (is_volatile && type == T_LONG) { | |
1278 LIR_Address* addr = new LIR_Address(src, offset, T_DOUBLE); | |
1279 LIR_Opr tmp = new_register(T_DOUBLE); | |
1280 __ load(addr, tmp); | |
1281 LIR_Opr spill = new_register(T_LONG); | |
1282 set_vreg_flag(spill, must_start_in_memory); | |
1283 __ move(tmp, spill); | |
1284 __ move(spill, dst); | |
1285 } else { | |
1286 LIR_Address* addr = new LIR_Address(src, offset, type); | |
1287 __ load(addr, dst); | |
1288 } | |
1289 } | |
1290 | |
1291 | |
1292 void LIRGenerator::put_Object_unsafe(LIR_Opr src, LIR_Opr offset, LIR_Opr data, | |
1293 BasicType type, bool is_volatile) { | |
1294 if (is_volatile && type == T_LONG) { | |
1295 LIR_Address* addr = new LIR_Address(src, offset, T_DOUBLE); | |
1296 LIR_Opr tmp = new_register(T_DOUBLE); | |
1297 LIR_Opr spill = new_register(T_DOUBLE); | |
1298 set_vreg_flag(spill, must_start_in_memory); | |
1299 __ move(data, spill); | |
1300 __ move(spill, tmp); | |
1301 __ move(tmp, addr); | |
1302 } else { | |
1303 LIR_Address* addr = new LIR_Address(src, offset, type); | |
1304 bool is_obj = (type == T_ARRAY || type == T_OBJECT); | |
1305 if (is_obj) { | |
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1307 pre_barrier(LIR_OprFact::address(addr), false, NULL); |
0 | 1308 __ move(data, addr); |
1309 assert(src->is_register(), "must be register"); | |
1310 // Seems to be a precise address | |
1311 post_barrier(LIR_OprFact::address(addr), data); | |
1312 } else { | |
1313 __ move(data, addr); | |
1314 } | |
1315 } | |
1316 } |