1 /*
2 * Copyright (c) 2005, 2024, 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 #include "precompiled.hpp"
26 #include "c1/c1_Compilation.hpp"
27 #include "c1/c1_FrameMap.hpp"
28 #include "c1/c1_Instruction.hpp"
29 #include "c1/c1_LIRAssembler.hpp"
30 #include "c1/c1_LIRGenerator.hpp"
31 #include "c1/c1_Runtime1.hpp"
32 #include "c1/c1_ValueStack.hpp"
33 #include "ci/ciArray.hpp"
34 #include "ci/ciObjArrayKlass.hpp"
35 #include "ci/ciTypeArrayKlass.hpp"
36 #include "gc/shared/c1/barrierSetC1.hpp"
37 #include "runtime/sharedRuntime.hpp"
38 #include "runtime/stubRoutines.hpp"
39 #include "utilities/powerOfTwo.hpp"
40 #include "vmreg_x86.inline.hpp"
41
42 #ifdef ASSERT
43 #define __ gen()->lir(__FILE__, __LINE__)->
44 #else
45 #define __ gen()->lir()->
46 #endif
47
48 // Item will be loaded into a byte register; Intel only
49 void LIRItem::load_byte_item() {
50 load_item();
51 LIR_Opr res = result();
52
53 if (!res->is_virtual() || !_gen->is_vreg_flag_set(res, LIRGenerator::byte_reg)) {
54 // make sure that it is a byte register
55 assert(!value()->type()->is_float() && !value()->type()->is_double(),
56 "can't load floats in byte register");
57 LIR_Opr reg = _gen->rlock_byte(T_BYTE);
58 __ move(res, reg);
59
60 _result = reg;
61 }
62 }
63
64
65 void LIRItem::load_nonconstant() {
66 LIR_Opr r = value()->operand();
67 if (r->is_constant()) {
68 _result = r;
69 } else {
70 load_item();
71 }
72 }
73
74 //--------------------------------------------------------------
75 // LIRGenerator
76 //--------------------------------------------------------------
77
78
79 LIR_Opr LIRGenerator::exceptionOopOpr() { return FrameMap::rax_oop_opr; }
80 LIR_Opr LIRGenerator::exceptionPcOpr() { return FrameMap::rdx_opr; }
81 LIR_Opr LIRGenerator::divInOpr() { return FrameMap::rax_opr; }
82 LIR_Opr LIRGenerator::divOutOpr() { return FrameMap::rax_opr; }
83 LIR_Opr LIRGenerator::remOutOpr() { return FrameMap::rdx_opr; }
84 LIR_Opr LIRGenerator::shiftCountOpr() { return FrameMap::rcx_opr; }
85 LIR_Opr LIRGenerator::syncLockOpr() { return new_register(T_INT); }
86 LIR_Opr LIRGenerator::syncTempOpr() { return FrameMap::rax_opr; }
87 LIR_Opr LIRGenerator::getThreadTemp() { return LIR_OprFact::illegalOpr; }
88
89
90 LIR_Opr LIRGenerator::result_register_for(ValueType* type, bool callee) {
91 LIR_Opr opr;
92 switch (type->tag()) {
93 case intTag: opr = FrameMap::rax_opr; break;
94 case objectTag: opr = FrameMap::rax_oop_opr; break;
95 case longTag: opr = FrameMap::long0_opr; break;
96 #ifdef _LP64
97 case floatTag: opr = FrameMap::xmm0_float_opr; break;
98 case doubleTag: opr = FrameMap::xmm0_double_opr; break;
99 #else
100 case floatTag: opr = UseSSE >= 1 ? FrameMap::xmm0_float_opr : FrameMap::fpu0_float_opr; break;
101 case doubleTag: opr = UseSSE >= 2 ? FrameMap::xmm0_double_opr : FrameMap::fpu0_double_opr; break;
102 #endif // _LP64
103 case addressTag:
104 default: ShouldNotReachHere(); return LIR_OprFact::illegalOpr;
105 }
106
107 assert(opr->type_field() == as_OprType(as_BasicType(type)), "type mismatch");
108 return opr;
109 }
110
111
112 LIR_Opr LIRGenerator::rlock_byte(BasicType type) {
113 LIR_Opr reg = new_register(T_INT);
114 set_vreg_flag(reg, LIRGenerator::byte_reg);
115 return reg;
116 }
117
118
119 //--------- loading items into registers --------------------------------
120
121
122 // i486 instructions can inline constants
123 bool LIRGenerator::can_store_as_constant(Value v, BasicType type) const {
124 if (type == T_SHORT || type == T_CHAR) {
125 return false;
126 }
127 Constant* c = v->as_Constant();
128 if (c && c->state_before() == nullptr) {
129 // constants of any type can be stored directly, except for
130 // unloaded object constants.
131 return true;
132 }
133 return false;
134 }
135
136
137 bool LIRGenerator::can_inline_as_constant(Value v) const {
138 if (v->type()->tag() == longTag) return false;
139 return v->type()->tag() != objectTag ||
140 (v->type()->is_constant() && v->type()->as_ObjectType()->constant_value()->is_null_object());
141 }
142
143
144 bool LIRGenerator::can_inline_as_constant(LIR_Const* c) const {
145 if (c->type() == T_LONG) return false;
146 return c->type() != T_OBJECT || c->as_jobject() == nullptr;
147 }
148
149
150 LIR_Opr LIRGenerator::safepoint_poll_register() {
151 NOT_LP64( return new_register(T_ADDRESS); )
152 return LIR_OprFact::illegalOpr;
153 }
154
155
156 LIR_Address* LIRGenerator::generate_address(LIR_Opr base, LIR_Opr index,
157 int shift, int disp, BasicType type) {
158 assert(base->is_register(), "must be");
159 if (index->is_constant()) {
160 LIR_Const *constant = index->as_constant_ptr();
161 #ifdef _LP64
162 jlong c;
163 if (constant->type() == T_INT) {
164 c = (jlong(index->as_jint()) << shift) + disp;
165 } else {
166 assert(constant->type() == T_LONG, "should be");
167 c = (index->as_jlong() << shift) + disp;
168 }
169 if ((jlong)((jint)c) == c) {
170 return new LIR_Address(base, (jint)c, type);
171 } else {
172 LIR_Opr tmp = new_register(T_LONG);
173 __ move(index, tmp);
174 return new LIR_Address(base, tmp, type);
175 }
176 #else
177 return new LIR_Address(base,
178 ((intx)(constant->as_jint()) << shift) + disp,
179 type);
180 #endif
181 } else {
182 return new LIR_Address(base, index, (LIR_Address::Scale)shift, disp, type);
183 }
184 }
185
186
187 LIR_Address* LIRGenerator::emit_array_address(LIR_Opr array_opr, LIR_Opr index_opr,
188 BasicType type) {
189 int offset_in_bytes = arrayOopDesc::base_offset_in_bytes(type);
190
191 LIR_Address* addr;
192 if (index_opr->is_constant()) {
193 int elem_size = type2aelembytes(type);
194 #ifdef _LP64
195 jint index = index_opr->as_jint();
196 jlong disp = offset_in_bytes + (jlong)(index) * elem_size;
197 if (disp > max_jint) {
198 // Displacement overflow. Cannot directly use instruction with 32-bit displacement for 64-bit addresses.
199 // Convert array index to long to do array offset computation with 64-bit values.
200 index_opr = new_register(T_LONG);
201 __ move(LIR_OprFact::longConst(index), index_opr);
202 addr = new LIR_Address(array_opr, index_opr, LIR_Address::scale(type), offset_in_bytes, type);
203 } else {
204 addr = new LIR_Address(array_opr, (intx)disp, type);
205 }
206 #else
207 // A displacement overflow can also occur for x86 but that is not a problem due to the 32-bit address range!
208 // Let's assume an array 'a' and an access with displacement 'disp'. When disp overflows, then "a + disp" will
209 // always be negative (i.e. underflows the 32-bit address range):
210 // Let N = 2^32: a + signed_overflow(disp) = a + disp - N.
211 // "a + disp" is always smaller than N. If an index was chosen which would point to an address beyond N, then
212 // range checks would catch that and throw an exception. Thus, a + disp < 0 holds which means that it always
213 // underflows the 32-bit address range:
214 // unsigned_underflow(a + signed_overflow(disp)) = unsigned_underflow(a + disp - N)
215 // = (a + disp - N) + N = a + disp
216 // This shows that we still end up at the correct address with a displacement overflow due to the 32-bit address
217 // range limitation. This overflow only needs to be handled if addresses can be larger as on 64-bit platforms.
218 addr = new LIR_Address(array_opr, offset_in_bytes + (intx)(index_opr->as_jint()) * elem_size, type);
219 #endif // _LP64
220 } else {
221 #ifdef _LP64
222 if (index_opr->type() == T_INT) {
223 LIR_Opr tmp = new_register(T_LONG);
224 __ convert(Bytecodes::_i2l, index_opr, tmp);
225 index_opr = tmp;
226 }
227 #endif // _LP64
228 addr = new LIR_Address(array_opr,
229 index_opr,
230 LIR_Address::scale(type),
231 offset_in_bytes, type);
232 }
233 return addr;
234 }
235
236
237 LIR_Opr LIRGenerator::load_immediate(jlong x, BasicType type) {
238 LIR_Opr r;
239 if (type == T_LONG) {
240 r = LIR_OprFact::longConst(x);
241 } else if (type == T_INT) {
242 r = LIR_OprFact::intConst(checked_cast<jint>(x));
243 } else {
244 ShouldNotReachHere();
245 }
246 return r;
247 }
248
249 void LIRGenerator::increment_counter(address counter, BasicType type, int step) {
250 LIR_Opr pointer = new_pointer_register();
251 __ move(LIR_OprFact::intptrConst(counter), pointer);
252 LIR_Address* addr = new LIR_Address(pointer, type);
253 increment_counter(addr, step);
254 }
255
256
257 void LIRGenerator::increment_counter(LIR_Address* addr, int step) {
258 __ add((LIR_Opr)addr, LIR_OprFact::intConst(step), (LIR_Opr)addr);
259 }
260
261 void LIRGenerator::cmp_mem_int(LIR_Condition condition, LIR_Opr base, int disp, int c, CodeEmitInfo* info) {
262 __ cmp_mem_int(condition, base, disp, c, info);
263 }
264
265
266 void LIRGenerator::cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, int disp, BasicType type, CodeEmitInfo* info) {
267 __ cmp_reg_mem(condition, reg, new LIR_Address(base, disp, type), info);
268 }
269
270
271 bool LIRGenerator::strength_reduce_multiply(LIR_Opr left, jint c, LIR_Opr result, LIR_Opr tmp) {
272 if (tmp->is_valid() && c > 0 && c < max_jint) {
273 if (is_power_of_2(c + 1)) {
274 __ move(left, tmp);
275 __ shift_left(left, log2i_exact(c + 1), left);
276 __ sub(left, tmp, result);
277 return true;
278 } else if (is_power_of_2(c - 1)) {
279 __ move(left, tmp);
280 __ shift_left(left, log2i_exact(c - 1), left);
281 __ add(left, tmp, result);
282 return true;
283 }
284 }
285 return false;
286 }
287
288
289 void LIRGenerator::store_stack_parameter (LIR_Opr item, ByteSize offset_from_sp) {
290 BasicType type = item->type();
291 __ store(item, new LIR_Address(FrameMap::rsp_opr, in_bytes(offset_from_sp), type));
292 }
293
294 void LIRGenerator::array_store_check(LIR_Opr value, LIR_Opr array, CodeEmitInfo* store_check_info, ciMethod* profiled_method, int profiled_bci) {
295 LIR_Opr tmp1 = new_register(objectType);
296 LIR_Opr tmp2 = new_register(objectType);
297 LIR_Opr tmp3 = new_register(objectType);
298 __ store_check(value, array, tmp1, tmp2, tmp3, store_check_info, profiled_method, profiled_bci);
299 }
300
301 //----------------------------------------------------------------------
302 // visitor functions
303 //----------------------------------------------------------------------
304
305 void LIRGenerator::do_MonitorEnter(MonitorEnter* x) {
306 assert(x->is_pinned(),"");
307 LIRItem obj(x->obj(), this);
308 obj.load_item();
309
310 set_no_result(x);
311
312 // "lock" stores the address of the monitor stack slot, so this is not an oop
313 LIR_Opr lock = new_register(T_INT);
314
315 CodeEmitInfo* info_for_exception = nullptr;
316 if (x->needs_null_check()) {
317 info_for_exception = state_for(x);
318 }
319 // this CodeEmitInfo must not have the xhandlers because here the
320 // object is already locked (xhandlers expect object to be unlocked)
321 CodeEmitInfo* info = state_for(x, x->state(), true);
322 LIR_Opr tmp = LockingMode == LM_LIGHTWEIGHT ? new_register(T_ADDRESS) : LIR_OprFact::illegalOpr;
323 monitor_enter(obj.result(), lock, syncTempOpr(), tmp,
324 x->monitor_no(), info_for_exception, info);
325 }
326
327
328 void LIRGenerator::do_MonitorExit(MonitorExit* x) {
329 assert(x->is_pinned(),"");
330
331 LIRItem obj(x->obj(), this);
332 obj.dont_load_item();
333
334 LIR_Opr lock = new_register(T_INT);
335 LIR_Opr obj_temp = new_register(T_INT);
336 set_no_result(x);
337 monitor_exit(obj_temp, lock, syncTempOpr(), LIR_OprFact::illegalOpr, x->monitor_no());
338 }
339
340 // _ineg, _lneg, _fneg, _dneg
341 void LIRGenerator::do_NegateOp(NegateOp* x) {
342 LIRItem value(x->x(), this);
343 value.set_destroys_register();
344 value.load_item();
345 LIR_Opr reg = rlock(x);
346
347 LIR_Opr tmp = LIR_OprFact::illegalOpr;
348 #ifdef _LP64
349 if (UseAVX > 2 && !VM_Version::supports_avx512vl()) {
350 if (x->type()->tag() == doubleTag) {
351 tmp = new_register(T_DOUBLE);
352 __ move(LIR_OprFact::doubleConst(-0.0), tmp);
353 }
354 else if (x->type()->tag() == floatTag) {
355 tmp = new_register(T_FLOAT);
356 __ move(LIR_OprFact::floatConst(-0.0), tmp);
357 }
358 }
359 #endif
360 __ negate(value.result(), reg, tmp);
361
362 set_result(x, round_item(reg));
363 }
364
365 // for _fadd, _fmul, _fsub, _fdiv, _frem
366 // _dadd, _dmul, _dsub, _ddiv, _drem
367 void LIRGenerator::do_ArithmeticOp_FPU(ArithmeticOp* x) {
368 LIRItem left(x->x(), this);
369 LIRItem right(x->y(), this);
370 LIRItem* left_arg = &left;
371 LIRItem* right_arg = &right;
372 assert(!left.is_stack() || !right.is_stack(), "can't both be memory operands");
373 bool must_load_both = (x->op() == Bytecodes::_frem || x->op() == Bytecodes::_drem);
374 if (left.is_register() || x->x()->type()->is_constant() || must_load_both) {
375 left.load_item();
376 } else {
377 left.dont_load_item();
378 }
379
380 #ifndef _LP64
381 // do not load right operand if it is a constant. only 0 and 1 are
382 // loaded because there are special instructions for loading them
383 // without memory access (not needed for SSE2 instructions)
384 bool must_load_right = false;
385 if (right.is_constant()) {
386 LIR_Const* c = right.result()->as_constant_ptr();
387 assert(c != nullptr, "invalid constant");
388 assert(c->type() == T_FLOAT || c->type() == T_DOUBLE, "invalid type");
389
390 if (c->type() == T_FLOAT) {
391 must_load_right = UseSSE < 1 && (c->is_one_float() || c->is_zero_float());
392 } else {
393 must_load_right = UseSSE < 2 && (c->is_one_double() || c->is_zero_double());
394 }
395 }
396 #endif // !LP64
397
398 if (must_load_both) {
399 // frem and drem destroy also right operand, so move it to a new register
400 right.set_destroys_register();
401 right.load_item();
402 } else if (right.is_register()) {
403 right.load_item();
404 #ifndef _LP64
405 } else if (must_load_right) {
406 right.load_item();
407 #endif // !LP64
408 } else {
409 right.dont_load_item();
410 }
411 LIR_Opr reg = rlock(x);
412 LIR_Opr tmp = LIR_OprFact::illegalOpr;
413 if (x->op() == Bytecodes::_dmul || x->op() == Bytecodes::_ddiv) {
414 tmp = new_register(T_DOUBLE);
415 }
416
417 #ifdef _LP64
418 if (x->op() == Bytecodes::_frem || x->op() == Bytecodes::_drem) {
419 // frem and drem are implemented as a direct call into the runtime.
420 LIRItem left(x->x(), this);
421 LIRItem right(x->y(), this);
422
423 BasicType bt = as_BasicType(x->type());
424 BasicTypeList signature(2);
425 signature.append(bt);
426 signature.append(bt);
427 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
428
429 const LIR_Opr result_reg = result_register_for(x->type());
430 left.load_item_force(cc->at(0));
431 right.load_item_force(cc->at(1));
432
433 address entry = nullptr;
434 switch (x->op()) {
435 case Bytecodes::_frem:
436 entry = CAST_FROM_FN_PTR(address, SharedRuntime::frem);
437 break;
438 case Bytecodes::_drem:
439 entry = CAST_FROM_FN_PTR(address, SharedRuntime::drem);
440 break;
441 default:
442 ShouldNotReachHere();
443 }
444
445 LIR_Opr result = rlock_result(x);
446 __ call_runtime_leaf(entry, getThreadTemp(), result_reg, cc->args());
447 __ move(result_reg, result);
448 } else {
449 arithmetic_op_fpu(x->op(), reg, left.result(), right.result(), tmp);
450 set_result(x, round_item(reg));
451 }
452 #else
453 if ((UseSSE >= 1 && x->op() == Bytecodes::_frem) || (UseSSE >= 2 && x->op() == Bytecodes::_drem)) {
454 // special handling for frem and drem: no SSE instruction, so must use FPU with temporary fpu stack slots
455 LIR_Opr fpu0, fpu1;
456 if (x->op() == Bytecodes::_frem) {
457 fpu0 = LIR_OprFact::single_fpu(0);
458 fpu1 = LIR_OprFact::single_fpu(1);
459 } else {
460 fpu0 = LIR_OprFact::double_fpu(0);
461 fpu1 = LIR_OprFact::double_fpu(1);
462 }
463 __ move(right.result(), fpu1); // order of left and right operand is important!
464 __ move(left.result(), fpu0);
465 __ rem (fpu0, fpu1, fpu0);
466 __ move(fpu0, reg);
467
468 } else {
469 arithmetic_op_fpu(x->op(), reg, left.result(), right.result(), tmp);
470 }
471 set_result(x, round_item(reg));
472 #endif // _LP64
473 }
474
475
476 // for _ladd, _lmul, _lsub, _ldiv, _lrem
477 void LIRGenerator::do_ArithmeticOp_Long(ArithmeticOp* x) {
478 if (x->op() == Bytecodes::_ldiv || x->op() == Bytecodes::_lrem ) {
479 // long division is implemented as a direct call into the runtime
480 LIRItem left(x->x(), this);
481 LIRItem right(x->y(), this);
482
483 // the check for division by zero destroys the right operand
484 right.set_destroys_register();
485
486 BasicTypeList signature(2);
487 signature.append(T_LONG);
488 signature.append(T_LONG);
489 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
490
491 // check for division by zero (destroys registers of right operand!)
492 CodeEmitInfo* info = state_for(x);
493
494 const LIR_Opr result_reg = result_register_for(x->type());
495 left.load_item_force(cc->at(1));
496 right.load_item();
497
498 __ move(right.result(), cc->at(0));
499
500 __ cmp(lir_cond_equal, right.result(), LIR_OprFact::longConst(0));
501 __ branch(lir_cond_equal, new DivByZeroStub(info));
502
503 address entry = nullptr;
504 switch (x->op()) {
505 case Bytecodes::_lrem:
506 entry = CAST_FROM_FN_PTR(address, SharedRuntime::lrem);
507 break; // check if dividend is 0 is done elsewhere
508 case Bytecodes::_ldiv:
509 entry = CAST_FROM_FN_PTR(address, SharedRuntime::ldiv);
510 break; // check if dividend is 0 is done elsewhere
511 default:
512 ShouldNotReachHere();
513 }
514
515 LIR_Opr result = rlock_result(x);
516 __ call_runtime_leaf(entry, getThreadTemp(), result_reg, cc->args());
517 __ move(result_reg, result);
518 } else if (x->op() == Bytecodes::_lmul) {
519 // missing test if instr is commutative and if we should swap
520 LIRItem left(x->x(), this);
521 LIRItem right(x->y(), this);
522
523 // right register is destroyed by the long mul, so it must be
524 // copied to a new register.
525 right.set_destroys_register();
526
527 left.load_item();
528 right.load_item();
529
530 LIR_Opr reg = FrameMap::long0_opr;
531 arithmetic_op_long(x->op(), reg, left.result(), right.result(), nullptr);
532 LIR_Opr result = rlock_result(x);
533 __ move(reg, result);
534 } else {
535 // missing test if instr is commutative and if we should swap
536 LIRItem left(x->x(), this);
537 LIRItem right(x->y(), this);
538
539 left.load_item();
540 // don't load constants to save register
541 right.load_nonconstant();
542 rlock_result(x);
543 arithmetic_op_long(x->op(), x->operand(), left.result(), right.result(), nullptr);
544 }
545 }
546
547
548
549 // for: _iadd, _imul, _isub, _idiv, _irem
550 void LIRGenerator::do_ArithmeticOp_Int(ArithmeticOp* x) {
551 if (x->op() == Bytecodes::_idiv || x->op() == Bytecodes::_irem) {
552 // The requirements for division and modulo
553 // input : rax,: dividend min_int
554 // reg: divisor (may not be rax,/rdx) -1
555 //
556 // output: rax,: quotient (= rax, idiv reg) min_int
557 // rdx: remainder (= rax, irem reg) 0
558
559 // rax, and rdx will be destroyed
560
561 // Note: does this invalidate the spec ???
562 LIRItem right(x->y(), this);
563 LIRItem left(x->x() , this); // visit left second, so that the is_register test is valid
564
565 // call state_for before load_item_force because state_for may
566 // force the evaluation of other instructions that are needed for
567 // correct debug info. Otherwise the live range of the fix
568 // register might be too long.
569 CodeEmitInfo* info = state_for(x);
570
571 left.load_item_force(divInOpr());
572
573 right.load_item();
574
575 LIR_Opr result = rlock_result(x);
576 LIR_Opr result_reg;
577 if (x->op() == Bytecodes::_idiv) {
578 result_reg = divOutOpr();
579 } else {
580 result_reg = remOutOpr();
581 }
582
583 if (!ImplicitDiv0Checks) {
584 __ cmp(lir_cond_equal, right.result(), LIR_OprFact::intConst(0));
585 __ branch(lir_cond_equal, new DivByZeroStub(info));
586 // Idiv/irem cannot trap (passing info would generate an assertion).
587 info = nullptr;
588 }
589 LIR_Opr tmp = FrameMap::rdx_opr; // idiv and irem use rdx in their implementation
590 if (x->op() == Bytecodes::_irem) {
591 __ irem(left.result(), right.result(), result_reg, tmp, info);
592 } else if (x->op() == Bytecodes::_idiv) {
593 __ idiv(left.result(), right.result(), result_reg, tmp, info);
594 } else {
595 ShouldNotReachHere();
596 }
597
598 __ move(result_reg, result);
599 } else {
600 // missing test if instr is commutative and if we should swap
601 LIRItem left(x->x(), this);
602 LIRItem right(x->y(), this);
603 LIRItem* left_arg = &left;
604 LIRItem* right_arg = &right;
605 if (x->is_commutative() && left.is_stack() && right.is_register()) {
606 // swap them if left is real stack (or cached) and right is real register(not cached)
607 left_arg = &right;
608 right_arg = &left;
609 }
610
611 left_arg->load_item();
612
613 // do not need to load right, as we can handle stack and constants
614 if (x->op() == Bytecodes::_imul ) {
615 // check if we can use shift instead
616 bool use_constant = false;
617 bool use_tmp = false;
618 if (right_arg->is_constant()) {
619 jint iconst = right_arg->get_jint_constant();
620 if (iconst > 0 && iconst < max_jint) {
621 if (is_power_of_2(iconst)) {
622 use_constant = true;
623 } else if (is_power_of_2(iconst - 1) || is_power_of_2(iconst + 1)) {
624 use_constant = true;
625 use_tmp = true;
626 }
627 }
628 }
629 if (use_constant) {
630 right_arg->dont_load_item();
631 } else {
632 right_arg->load_item();
633 }
634 LIR_Opr tmp = LIR_OprFact::illegalOpr;
635 if (use_tmp) {
636 tmp = new_register(T_INT);
637 }
638 rlock_result(x);
639
640 arithmetic_op_int(x->op(), x->operand(), left_arg->result(), right_arg->result(), tmp);
641 } else {
642 right_arg->dont_load_item();
643 rlock_result(x);
644 LIR_Opr tmp = LIR_OprFact::illegalOpr;
645 arithmetic_op_int(x->op(), x->operand(), left_arg->result(), right_arg->result(), tmp);
646 }
647 }
648 }
649
650
651 void LIRGenerator::do_ArithmeticOp(ArithmeticOp* x) {
652 // when an operand with use count 1 is the left operand, then it is
653 // likely that no move for 2-operand-LIR-form is necessary
654 if (x->is_commutative() && x->y()->as_Constant() == nullptr && x->x()->use_count() > x->y()->use_count()) {
655 x->swap_operands();
656 }
657
658 ValueTag tag = x->type()->tag();
659 assert(x->x()->type()->tag() == tag && x->y()->type()->tag() == tag, "wrong parameters");
660 switch (tag) {
661 case floatTag:
662 case doubleTag: do_ArithmeticOp_FPU(x); return;
663 case longTag: do_ArithmeticOp_Long(x); return;
664 case intTag: do_ArithmeticOp_Int(x); return;
665 default: ShouldNotReachHere(); return;
666 }
667 }
668
669
670 // _ishl, _lshl, _ishr, _lshr, _iushr, _lushr
671 void LIRGenerator::do_ShiftOp(ShiftOp* x) {
672 // count must always be in rcx
673 LIRItem value(x->x(), this);
674 LIRItem count(x->y(), this);
675
676 ValueTag elemType = x->type()->tag();
677 bool must_load_count = !count.is_constant() || elemType == longTag;
678 if (must_load_count) {
679 // count for long must be in register
680 count.load_item_force(shiftCountOpr());
681 } else {
682 count.dont_load_item();
683 }
684 value.load_item();
685 LIR_Opr reg = rlock_result(x);
686
687 shift_op(x->op(), reg, value.result(), count.result(), LIR_OprFact::illegalOpr);
688 }
689
690
691 // _iand, _land, _ior, _lor, _ixor, _lxor
692 void LIRGenerator::do_LogicOp(LogicOp* x) {
693 // when an operand with use count 1 is the left operand, then it is
694 // likely that no move for 2-operand-LIR-form is necessary
695 if (x->is_commutative() && x->y()->as_Constant() == nullptr && x->x()->use_count() > x->y()->use_count()) {
696 x->swap_operands();
697 }
698
699 LIRItem left(x->x(), this);
700 LIRItem right(x->y(), this);
701
702 left.load_item();
703 right.load_nonconstant();
704 LIR_Opr reg = rlock_result(x);
705
706 logic_op(x->op(), reg, left.result(), right.result());
707 }
708
709
710
711 // _lcmp, _fcmpl, _fcmpg, _dcmpl, _dcmpg
712 void LIRGenerator::do_CompareOp(CompareOp* x) {
713 LIRItem left(x->x(), this);
714 LIRItem right(x->y(), this);
715 ValueTag tag = x->x()->type()->tag();
716 if (tag == longTag) {
717 left.set_destroys_register();
718 }
719 left.load_item();
720 right.load_item();
721 LIR_Opr reg = rlock_result(x);
722
723 if (x->x()->type()->is_float_kind()) {
724 Bytecodes::Code code = x->op();
725 __ fcmp2int(left.result(), right.result(), reg, (code == Bytecodes::_fcmpl || code == Bytecodes::_dcmpl));
726 } else if (x->x()->type()->tag() == longTag) {
727 __ lcmp2int(left.result(), right.result(), reg);
728 } else {
729 Unimplemented();
730 }
731 }
732
733 LIR_Opr LIRGenerator::atomic_cmpxchg(BasicType type, LIR_Opr addr, LIRItem& cmp_value, LIRItem& new_value) {
734 LIR_Opr ill = LIR_OprFact::illegalOpr; // for convenience
735 if (is_reference_type(type)) {
736 cmp_value.load_item_force(FrameMap::rax_oop_opr);
737 new_value.load_item();
738 __ cas_obj(addr->as_address_ptr()->base(), cmp_value.result(), new_value.result(), ill, ill);
739 } else if (type == T_INT) {
740 cmp_value.load_item_force(FrameMap::rax_opr);
741 new_value.load_item();
742 __ cas_int(addr->as_address_ptr()->base(), cmp_value.result(), new_value.result(), ill, ill);
743 } else if (type == T_LONG) {
744 cmp_value.load_item_force(FrameMap::long0_opr);
745 new_value.load_item_force(FrameMap::long1_opr);
746 __ cas_long(addr->as_address_ptr()->base(), cmp_value.result(), new_value.result(), ill, ill);
747 } else {
748 Unimplemented();
749 }
750 LIR_Opr result = new_register(T_INT);
751 __ cmove(lir_cond_equal, LIR_OprFact::intConst(1), LIR_OprFact::intConst(0),
752 result, T_INT);
753 return result;
754 }
755
756 LIR_Opr LIRGenerator::atomic_xchg(BasicType type, LIR_Opr addr, LIRItem& value) {
757 bool is_oop = is_reference_type(type);
758 LIR_Opr result = new_register(type);
759 value.load_item();
760 // Because we want a 2-arg form of xchg and xadd
761 __ move(value.result(), result);
762 assert(type == T_INT || is_oop LP64_ONLY( || type == T_LONG ), "unexpected type");
763 __ xchg(addr, result, result, LIR_OprFact::illegalOpr);
764 return result;
765 }
766
767 LIR_Opr LIRGenerator::atomic_add(BasicType type, LIR_Opr addr, LIRItem& value) {
768 LIR_Opr result = new_register(type);
769 value.load_item();
770 // Because we want a 2-arg form of xchg and xadd
771 __ move(value.result(), result);
772 assert(type == T_INT LP64_ONLY( || type == T_LONG ), "unexpected type");
773 __ xadd(addr, result, result, LIR_OprFact::illegalOpr);
774 return result;
775 }
776
777 void LIRGenerator::do_FmaIntrinsic(Intrinsic* x) {
778 assert(x->number_of_arguments() == 3, "wrong type");
779 assert(UseFMA, "Needs FMA instructions support.");
780 LIRItem value(x->argument_at(0), this);
781 LIRItem value1(x->argument_at(1), this);
782 LIRItem value2(x->argument_at(2), this);
783
784 value2.set_destroys_register();
785
786 value.load_item();
787 value1.load_item();
788 value2.load_item();
789
790 LIR_Opr calc_input = value.result();
791 LIR_Opr calc_input1 = value1.result();
792 LIR_Opr calc_input2 = value2.result();
793 LIR_Opr calc_result = rlock_result(x);
794
795 switch (x->id()) {
796 case vmIntrinsics::_fmaD: __ fmad(calc_input, calc_input1, calc_input2, calc_result); break;
797 case vmIntrinsics::_fmaF: __ fmaf(calc_input, calc_input1, calc_input2, calc_result); break;
798 default: ShouldNotReachHere();
799 }
800
801 }
802
803
804 void LIRGenerator::do_MathIntrinsic(Intrinsic* x) {
805 assert(x->number_of_arguments() == 1 || (x->number_of_arguments() == 2 && x->id() == vmIntrinsics::_dpow), "wrong type");
806
807 if (x->id() == vmIntrinsics::_dexp || x->id() == vmIntrinsics::_dlog ||
808 x->id() == vmIntrinsics::_dpow || x->id() == vmIntrinsics::_dcos ||
809 x->id() == vmIntrinsics::_dsin || x->id() == vmIntrinsics::_dtan ||
810 x->id() == vmIntrinsics::_dlog10
811 #ifdef _LP64
812 || x->id() == vmIntrinsics::_dtanh
813 #endif
814 ) {
815 do_LibmIntrinsic(x);
816 return;
817 }
818
819 LIRItem value(x->argument_at(0), this);
820
821 bool use_fpu = false;
822 #ifndef _LP64
823 if (UseSSE < 2) {
824 value.set_destroys_register();
825 }
826 #endif // !LP64
827 value.load_item();
828
829 LIR_Opr calc_input = value.result();
830 LIR_Opr calc_result = rlock_result(x);
831
832 LIR_Opr tmp = LIR_OprFact::illegalOpr;
833 #ifdef _LP64
834 if (UseAVX > 2 && (!VM_Version::supports_avx512vl()) &&
835 (x->id() == vmIntrinsics::_dabs)) {
836 tmp = new_register(T_DOUBLE);
837 __ move(LIR_OprFact::doubleConst(-0.0), tmp);
838 }
839 #endif
840 if (x->id() == vmIntrinsics::_floatToFloat16) {
841 tmp = new_register(T_FLOAT);
842 __ move(LIR_OprFact::floatConst(-0.0), tmp);
843 }
844
845 switch(x->id()) {
846 case vmIntrinsics::_dabs:
847 __ abs(calc_input, calc_result, tmp);
848 break;
849 case vmIntrinsics::_dsqrt:
850 case vmIntrinsics::_dsqrt_strict:
851 __ sqrt(calc_input, calc_result, LIR_OprFact::illegalOpr);
852 break;
853 case vmIntrinsics::_floatToFloat16:
854 __ f2hf(calc_input, calc_result, tmp);
855 break;
856 case vmIntrinsics::_float16ToFloat:
857 __ hf2f(calc_input, calc_result, LIR_OprFact::illegalOpr);
858 break;
859 default:
860 ShouldNotReachHere();
861 }
862
863 if (use_fpu) {
864 __ move(calc_result, x->operand());
865 }
866 }
867
868 void LIRGenerator::do_LibmIntrinsic(Intrinsic* x) {
869 LIRItem value(x->argument_at(0), this);
870 value.set_destroys_register();
871
872 LIR_Opr calc_result = rlock_result(x);
873 LIR_Opr result_reg = result_register_for(x->type());
874
875 CallingConvention* cc = nullptr;
876
877 if (x->id() == vmIntrinsics::_dpow) {
878 LIRItem value1(x->argument_at(1), this);
879
880 value1.set_destroys_register();
881
882 BasicTypeList signature(2);
883 signature.append(T_DOUBLE);
884 signature.append(T_DOUBLE);
885 cc = frame_map()->c_calling_convention(&signature);
886 value.load_item_force(cc->at(0));
887 value1.load_item_force(cc->at(1));
888 } else {
889 BasicTypeList signature(1);
890 signature.append(T_DOUBLE);
891 cc = frame_map()->c_calling_convention(&signature);
892 value.load_item_force(cc->at(0));
893 }
894
895 #ifndef _LP64
896 LIR_Opr tmp = FrameMap::fpu0_double_opr;
897 result_reg = tmp;
898 switch(x->id()) {
899 case vmIntrinsics::_dexp:
900 if (StubRoutines::dexp() != nullptr) {
901 __ call_runtime_leaf(StubRoutines::dexp(), getThreadTemp(), result_reg, cc->args());
902 } else {
903 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dexp), getThreadTemp(), result_reg, cc->args());
904 }
905 break;
906 case vmIntrinsics::_dlog:
907 if (StubRoutines::dlog() != nullptr) {
908 __ call_runtime_leaf(StubRoutines::dlog(), getThreadTemp(), result_reg, cc->args());
909 } else {
910 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dlog), getThreadTemp(), result_reg, cc->args());
911 }
912 break;
913 case vmIntrinsics::_dlog10:
914 if (StubRoutines::dlog10() != nullptr) {
915 __ call_runtime_leaf(StubRoutines::dlog10(), getThreadTemp(), result_reg, cc->args());
916 } else {
917 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dlog10), getThreadTemp(), result_reg, cc->args());
918 }
919 break;
920 case vmIntrinsics::_dpow:
921 if (StubRoutines::dpow() != nullptr) {
922 __ call_runtime_leaf(StubRoutines::dpow(), getThreadTemp(), result_reg, cc->args());
923 } else {
924 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dpow), getThreadTemp(), result_reg, cc->args());
925 }
926 break;
927 case vmIntrinsics::_dsin:
928 if (VM_Version::supports_sse2() && StubRoutines::dsin() != nullptr) {
929 __ call_runtime_leaf(StubRoutines::dsin(), getThreadTemp(), result_reg, cc->args());
930 } else {
931 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dsin), getThreadTemp(), result_reg, cc->args());
932 }
933 break;
934 case vmIntrinsics::_dcos:
935 if (VM_Version::supports_sse2() && StubRoutines::dcos() != nullptr) {
936 __ call_runtime_leaf(StubRoutines::dcos(), getThreadTemp(), result_reg, cc->args());
937 } else {
938 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dcos), getThreadTemp(), result_reg, cc->args());
939 }
940 break;
941 case vmIntrinsics::_dtan:
942 if (StubRoutines::dtan() != nullptr) {
943 __ call_runtime_leaf(StubRoutines::dtan(), getThreadTemp(), result_reg, cc->args());
944 } else {
945 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtan), getThreadTemp(), result_reg, cc->args());
946 }
947 break;
948 default: ShouldNotReachHere();
949 }
950 #else
951 switch (x->id()) {
952 case vmIntrinsics::_dexp:
953 if (StubRoutines::dexp() != nullptr) {
954 __ call_runtime_leaf(StubRoutines::dexp(), getThreadTemp(), result_reg, cc->args());
955 } else {
956 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dexp), getThreadTemp(), result_reg, cc->args());
957 }
958 break;
959 case vmIntrinsics::_dlog:
960 if (StubRoutines::dlog() != nullptr) {
961 __ call_runtime_leaf(StubRoutines::dlog(), getThreadTemp(), result_reg, cc->args());
962 } else {
963 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dlog), getThreadTemp(), result_reg, cc->args());
964 }
965 break;
966 case vmIntrinsics::_dlog10:
967 if (StubRoutines::dlog10() != nullptr) {
968 __ call_runtime_leaf(StubRoutines::dlog10(), getThreadTemp(), result_reg, cc->args());
969 } else {
970 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dlog10), getThreadTemp(), result_reg, cc->args());
971 }
972 break;
973 case vmIntrinsics::_dpow:
974 if (StubRoutines::dpow() != nullptr) {
975 __ call_runtime_leaf(StubRoutines::dpow(), getThreadTemp(), result_reg, cc->args());
976 } else {
977 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dpow), getThreadTemp(), result_reg, cc->args());
978 }
979 break;
980 case vmIntrinsics::_dsin:
981 if (StubRoutines::dsin() != nullptr) {
982 __ call_runtime_leaf(StubRoutines::dsin(), getThreadTemp(), result_reg, cc->args());
983 } else {
984 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dsin), getThreadTemp(), result_reg, cc->args());
985 }
986 break;
987 case vmIntrinsics::_dcos:
988 if (StubRoutines::dcos() != nullptr) {
989 __ call_runtime_leaf(StubRoutines::dcos(), getThreadTemp(), result_reg, cc->args());
990 } else {
991 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dcos), getThreadTemp(), result_reg, cc->args());
992 }
993 break;
994 case vmIntrinsics::_dtan:
995 if (StubRoutines::dtan() != nullptr) {
996 __ call_runtime_leaf(StubRoutines::dtan(), getThreadTemp(), result_reg, cc->args());
997 } else {
998 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtan), getThreadTemp(), result_reg, cc->args());
999 }
1000 break;
1001 case vmIntrinsics::_dtanh:
1002 assert(StubRoutines::dtanh() != nullptr, "tanh intrinsic not found");
1003 if (StubRoutines::dtanh() != nullptr) {
1004 __ call_runtime_leaf(StubRoutines::dtanh(), getThreadTemp(), result_reg, cc->args());
1005 }
1006 break;
1007 default: ShouldNotReachHere();
1008 }
1009 #endif // _LP64
1010 __ move(result_reg, calc_result);
1011 }
1012
1013 void LIRGenerator::do_ArrayCopy(Intrinsic* x) {
1014 assert(x->number_of_arguments() == 5, "wrong type");
1015
1016 // Make all state_for calls early since they can emit code
1017 CodeEmitInfo* info = nullptr;
1018 if (x->state_before() != nullptr && x->state_before()->force_reexecute()) {
1019 info = state_for(x, x->state_before());
1020 info->set_force_reexecute();
1021 } else {
1022 info = state_for(x, x->state());
1023 }
1024
1025 LIRItem src(x->argument_at(0), this);
1026 LIRItem src_pos(x->argument_at(1), this);
1027 LIRItem dst(x->argument_at(2), this);
1028 LIRItem dst_pos(x->argument_at(3), this);
1029 LIRItem length(x->argument_at(4), this);
1030
1031 // operands for arraycopy must use fixed registers, otherwise
1032 // LinearScan will fail allocation (because arraycopy always needs a
1033 // call)
1034
1035 int flags;
1036 ciArrayKlass* expected_type;
1037 arraycopy_helper(x, &flags, &expected_type);
1038 if (x->check_flag(Instruction::OmitChecksFlag)) {
1039 flags = 0;
1040 }
1041
1042 #ifndef _LP64
1043 src.load_item_force (FrameMap::rcx_oop_opr);
1044 src_pos.load_item_force (FrameMap::rdx_opr);
1045 dst.load_item_force (FrameMap::rax_oop_opr);
1046 dst_pos.load_item_force (FrameMap::rbx_opr);
1047 length.load_item_force (FrameMap::rdi_opr);
1048 LIR_Opr tmp = (FrameMap::rsi_opr);
1049
1050 if (expected_type != nullptr && flags == 0) {
1051 FrameMap* f = Compilation::current()->frame_map();
1052 f->update_reserved_argument_area_size(3 * BytesPerWord);
1053 }
1054 #else
1055
1056 // The java calling convention will give us enough registers
1057 // so that on the stub side the args will be perfect already.
1058 // On the other slow/special case side we call C and the arg
1059 // positions are not similar enough to pick one as the best.
1060 // Also because the java calling convention is a "shifted" version
1061 // of the C convention we can process the java args trivially into C
1062 // args without worry of overwriting during the xfer
1063
1064 src.load_item_force (FrameMap::as_oop_opr(j_rarg0));
1065 src_pos.load_item_force (FrameMap::as_opr(j_rarg1));
1066 dst.load_item_force (FrameMap::as_oop_opr(j_rarg2));
1067 dst_pos.load_item_force (FrameMap::as_opr(j_rarg3));
1068 length.load_item_force (FrameMap::as_opr(j_rarg4));
1069
1070 LIR_Opr tmp = FrameMap::as_opr(j_rarg5);
1071 #endif // LP64
1072
1073 set_no_result(x);
1074
1075 __ arraycopy(src.result(), src_pos.result(), dst.result(), dst_pos.result(), length.result(), tmp, expected_type, flags, info); // does add_safepoint
1076 }
1077
1078 void LIRGenerator::do_update_CRC32(Intrinsic* x) {
1079 assert(UseCRC32Intrinsics, "need AVX and LCMUL instructions support");
1080 // Make all state_for calls early since they can emit code
1081 LIR_Opr result = rlock_result(x);
1082 int flags = 0;
1083 switch (x->id()) {
1084 case vmIntrinsics::_updateCRC32: {
1085 LIRItem crc(x->argument_at(0), this);
1086 LIRItem val(x->argument_at(1), this);
1087 // val is destroyed by update_crc32
1088 val.set_destroys_register();
1089 crc.load_item();
1090 val.load_item();
1091 __ update_crc32(crc.result(), val.result(), result);
1092 break;
1093 }
1094 case vmIntrinsics::_updateBytesCRC32:
1095 case vmIntrinsics::_updateByteBufferCRC32: {
1096 bool is_updateBytes = (x->id() == vmIntrinsics::_updateBytesCRC32);
1097
1098 LIRItem crc(x->argument_at(0), this);
1099 LIRItem buf(x->argument_at(1), this);
1100 LIRItem off(x->argument_at(2), this);
1101 LIRItem len(x->argument_at(3), this);
1102 buf.load_item();
1103 off.load_nonconstant();
1104
1105 LIR_Opr index = off.result();
1106 int offset = is_updateBytes ? arrayOopDesc::base_offset_in_bytes(T_BYTE) : 0;
1107 if(off.result()->is_constant()) {
1108 index = LIR_OprFact::illegalOpr;
1109 offset += off.result()->as_jint();
1110 }
1111 LIR_Opr base_op = buf.result();
1112
1113 #ifndef _LP64
1114 if (!is_updateBytes) { // long b raw address
1115 base_op = new_register(T_INT);
1116 __ convert(Bytecodes::_l2i, buf.result(), base_op);
1117 }
1118 #else
1119 if (index->is_valid()) {
1120 LIR_Opr tmp = new_register(T_LONG);
1121 __ convert(Bytecodes::_i2l, index, tmp);
1122 index = tmp;
1123 }
1124 #endif
1125
1126 LIR_Address* a = new LIR_Address(base_op,
1127 index,
1128 offset,
1129 T_BYTE);
1130 BasicTypeList signature(3);
1131 signature.append(T_INT);
1132 signature.append(T_ADDRESS);
1133 signature.append(T_INT);
1134 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
1135 const LIR_Opr result_reg = result_register_for(x->type());
1136
1137 LIR_Opr addr = new_pointer_register();
1138 __ leal(LIR_OprFact::address(a), addr);
1139
1140 crc.load_item_force(cc->at(0));
1141 __ move(addr, cc->at(1));
1142 len.load_item_force(cc->at(2));
1143
1144 __ call_runtime_leaf(StubRoutines::updateBytesCRC32(), getThreadTemp(), result_reg, cc->args());
1145 __ move(result_reg, result);
1146
1147 break;
1148 }
1149 default: {
1150 ShouldNotReachHere();
1151 }
1152 }
1153 }
1154
1155 void LIRGenerator::do_update_CRC32C(Intrinsic* x) {
1156 Unimplemented();
1157 }
1158
1159 void LIRGenerator::do_vectorizedMismatch(Intrinsic* x) {
1160 assert(UseVectorizedMismatchIntrinsic, "need AVX instruction support");
1161
1162 // Make all state_for calls early since they can emit code
1163 LIR_Opr result = rlock_result(x);
1164
1165 LIRItem a(x->argument_at(0), this); // Object
1166 LIRItem aOffset(x->argument_at(1), this); // long
1167 LIRItem b(x->argument_at(2), this); // Object
1168 LIRItem bOffset(x->argument_at(3), this); // long
1169 LIRItem length(x->argument_at(4), this); // int
1170 LIRItem log2ArrayIndexScale(x->argument_at(5), this); // int
1171
1172 a.load_item();
1173 aOffset.load_nonconstant();
1174 b.load_item();
1175 bOffset.load_nonconstant();
1176
1177 long constant_aOffset = 0;
1178 LIR_Opr result_aOffset = aOffset.result();
1179 if (result_aOffset->is_constant()) {
1180 constant_aOffset = result_aOffset->as_jlong();
1181 result_aOffset = LIR_OprFact::illegalOpr;
1182 }
1183 LIR_Opr result_a = a.result();
1184
1185 long constant_bOffset = 0;
1186 LIR_Opr result_bOffset = bOffset.result();
1187 if (result_bOffset->is_constant()) {
1188 constant_bOffset = result_bOffset->as_jlong();
1189 result_bOffset = LIR_OprFact::illegalOpr;
1190 }
1191 LIR_Opr result_b = b.result();
1192
1193 #ifndef _LP64
1194 result_a = new_register(T_INT);
1195 __ convert(Bytecodes::_l2i, a.result(), result_a);
1196 result_b = new_register(T_INT);
1197 __ convert(Bytecodes::_l2i, b.result(), result_b);
1198 #endif
1199
1200
1201 LIR_Address* addr_a = new LIR_Address(result_a,
1202 result_aOffset,
1203 constant_aOffset,
1204 T_BYTE);
1205
1206 LIR_Address* addr_b = new LIR_Address(result_b,
1207 result_bOffset,
1208 constant_bOffset,
1209 T_BYTE);
1210
1211 BasicTypeList signature(4);
1212 signature.append(T_ADDRESS);
1213 signature.append(T_ADDRESS);
1214 signature.append(T_INT);
1215 signature.append(T_INT);
1216 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
1217 const LIR_Opr result_reg = result_register_for(x->type());
1218
1219 LIR_Opr ptr_addr_a = new_pointer_register();
1220 __ leal(LIR_OprFact::address(addr_a), ptr_addr_a);
1221
1222 LIR_Opr ptr_addr_b = new_pointer_register();
1223 __ leal(LIR_OprFact::address(addr_b), ptr_addr_b);
1224
1225 __ move(ptr_addr_a, cc->at(0));
1226 __ move(ptr_addr_b, cc->at(1));
1227 length.load_item_force(cc->at(2));
1228 log2ArrayIndexScale.load_item_force(cc->at(3));
1229
1230 __ call_runtime_leaf(StubRoutines::vectorizedMismatch(), getThreadTemp(), result_reg, cc->args());
1231 __ move(result_reg, result);
1232 }
1233
1234 #ifndef _LP64
1235 // _i2l, _i2f, _i2d, _l2i, _l2f, _l2d, _f2i, _f2l, _f2d, _d2i, _d2l, _d2f
1236 // _i2b, _i2c, _i2s
1237 static LIR_Opr fixed_register_for(BasicType type) {
1238 switch (type) {
1239 case T_FLOAT: return FrameMap::fpu0_float_opr;
1240 case T_DOUBLE: return FrameMap::fpu0_double_opr;
1241 case T_INT: return FrameMap::rax_opr;
1242 case T_LONG: return FrameMap::long0_opr;
1243 default: ShouldNotReachHere(); return LIR_OprFact::illegalOpr;
1244 }
1245 }
1246 #endif
1247
1248 void LIRGenerator::do_Convert(Convert* x) {
1249 #ifdef _LP64
1250 LIRItem value(x->value(), this);
1251 value.load_item();
1252 LIR_Opr input = value.result();
1253 LIR_Opr result = rlock(x);
1254 __ convert(x->op(), input, result);
1255 assert(result->is_virtual(), "result must be virtual register");
1256 set_result(x, result);
1257 #else
1258 // flags that vary for the different operations and different SSE-settings
1259 bool fixed_input = false, fixed_result = false, round_result = false, needs_stub = false;
1260
1261 switch (x->op()) {
1262 case Bytecodes::_i2l: // fall through
1263 case Bytecodes::_l2i: // fall through
1264 case Bytecodes::_i2b: // fall through
1265 case Bytecodes::_i2c: // fall through
1266 case Bytecodes::_i2s: fixed_input = false; fixed_result = false; round_result = false; needs_stub = false; break;
1267
1268 case Bytecodes::_f2d: fixed_input = UseSSE == 1; fixed_result = false; round_result = false; needs_stub = false; break;
1269 case Bytecodes::_d2f: fixed_input = false; fixed_result = UseSSE == 1; round_result = UseSSE < 1; needs_stub = false; break;
1270 case Bytecodes::_i2f: fixed_input = false; fixed_result = false; round_result = UseSSE < 1; needs_stub = false; break;
1271 case Bytecodes::_i2d: fixed_input = false; fixed_result = false; round_result = false; needs_stub = false; break;
1272 case Bytecodes::_f2i: fixed_input = false; fixed_result = false; round_result = false; needs_stub = true; break;
1273 case Bytecodes::_d2i: fixed_input = false; fixed_result = false; round_result = false; needs_stub = true; break;
1274 case Bytecodes::_l2f: fixed_input = false; fixed_result = UseSSE >= 1; round_result = UseSSE < 1; needs_stub = false; break;
1275 case Bytecodes::_l2d: fixed_input = false; fixed_result = UseSSE >= 2; round_result = UseSSE < 2; needs_stub = false; break;
1276 case Bytecodes::_f2l: fixed_input = true; fixed_result = true; round_result = false; needs_stub = false; break;
1277 case Bytecodes::_d2l: fixed_input = true; fixed_result = true; round_result = false; needs_stub = false; break;
1278 default: ShouldNotReachHere();
1279 }
1280
1281 LIRItem value(x->value(), this);
1282 value.load_item();
1283 LIR_Opr input = value.result();
1284 LIR_Opr result = rlock(x);
1285
1286 // arguments of lir_convert
1287 LIR_Opr conv_input = input;
1288 LIR_Opr conv_result = result;
1289 ConversionStub* stub = nullptr;
1290
1291 if (fixed_input) {
1292 conv_input = fixed_register_for(input->type());
1293 __ move(input, conv_input);
1294 }
1295
1296 assert(fixed_result == false || round_result == false, "cannot set both");
1297 if (fixed_result) {
1298 conv_result = fixed_register_for(result->type());
1299 } else if (round_result) {
1300 result = new_register(result->type());
1301 set_vreg_flag(result, must_start_in_memory);
1302 }
1303
1304 if (needs_stub) {
1305 stub = new ConversionStub(x->op(), conv_input, conv_result);
1306 }
1307
1308 __ convert(x->op(), conv_input, conv_result, stub);
1309
1310 if (result != conv_result) {
1311 __ move(conv_result, result);
1312 }
1313
1314 assert(result->is_virtual(), "result must be virtual register");
1315 set_result(x, result);
1316 #endif // _LP64
1317 }
1318
1319
1320 void LIRGenerator::do_NewInstance(NewInstance* x) {
1321 print_if_not_loaded(x);
1322
1323 CodeEmitInfo* info = state_for(x, x->state());
1324 LIR_Opr reg = result_register_for(x->type());
1325 new_instance(reg, x->klass(), x->is_unresolved(),
1326 FrameMap::rcx_oop_opr,
1327 FrameMap::rdi_oop_opr,
1328 FrameMap::rsi_oop_opr,
1329 LIR_OprFact::illegalOpr,
1330 FrameMap::rdx_metadata_opr, info);
1331 LIR_Opr result = rlock_result(x);
1332 __ move(reg, result);
1333 }
1334
1335
1336 void LIRGenerator::do_NewTypeArray(NewTypeArray* x) {
1337 CodeEmitInfo* info = nullptr;
1338 if (x->state_before() != nullptr && x->state_before()->force_reexecute()) {
1339 info = state_for(x, x->state_before());
1340 info->set_force_reexecute();
1341 } else {
1342 info = state_for(x, x->state());
1343 }
1344
1345 LIRItem length(x->length(), this);
1346 length.load_item_force(FrameMap::rbx_opr);
1347
1348 LIR_Opr reg = result_register_for(x->type());
1349 LIR_Opr tmp1 = FrameMap::rcx_oop_opr;
1350 LIR_Opr tmp2 = FrameMap::rsi_oop_opr;
1351 LIR_Opr tmp3 = FrameMap::rdi_oop_opr;
1352 LIR_Opr tmp4 = reg;
1353 LIR_Opr klass_reg = FrameMap::rdx_metadata_opr;
1354 LIR_Opr len = length.result();
1355 BasicType elem_type = x->elt_type();
1356
1357 __ metadata2reg(ciTypeArrayKlass::make(elem_type)->constant_encoding(), klass_reg);
1358
1359 CodeStub* slow_path = new NewTypeArrayStub(klass_reg, len, reg, info);
1360 __ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4, elem_type, klass_reg, slow_path, x->zero_array());
1361
1362 LIR_Opr result = rlock_result(x);
1363 __ move(reg, result);
1364 }
1365
1366
1367 void LIRGenerator::do_NewObjectArray(NewObjectArray* x) {
1368 LIRItem length(x->length(), this);
1369 // in case of patching (i.e., object class is not yet loaded), we need to reexecute the instruction
1370 // and therefore provide the state before the parameters have been consumed
1371 CodeEmitInfo* patching_info = nullptr;
1372 if (!x->klass()->is_loaded() || PatchALot) {
1373 patching_info = state_for(x, x->state_before());
1374 }
1375
1376 CodeEmitInfo* info = state_for(x, x->state());
1377
1378 const LIR_Opr reg = result_register_for(x->type());
1379 LIR_Opr tmp1 = FrameMap::rcx_oop_opr;
1380 LIR_Opr tmp2 = FrameMap::rsi_oop_opr;
1381 LIR_Opr tmp3 = FrameMap::rdi_oop_opr;
1382 LIR_Opr tmp4 = reg;
1383 LIR_Opr klass_reg = FrameMap::rdx_metadata_opr;
1384
1385 length.load_item_force(FrameMap::rbx_opr);
1386 LIR_Opr len = length.result();
1387
1388 CodeStub* slow_path = new NewObjectArrayStub(klass_reg, len, reg, info);
1389 ciKlass* obj = (ciKlass*) ciObjArrayKlass::make(x->klass());
1390 if (obj == ciEnv::unloaded_ciobjarrayklass()) {
1391 BAILOUT("encountered unloaded_ciobjarrayklass due to out of memory error");
1392 }
1393 klass2reg_with_patching(klass_reg, obj, patching_info);
1394 __ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4, T_OBJECT, klass_reg, slow_path);
1395
1396 LIR_Opr result = rlock_result(x);
1397 __ move(reg, result);
1398 }
1399
1400
1401 void LIRGenerator::do_NewMultiArray(NewMultiArray* x) {
1402 Values* dims = x->dims();
1403 int i = dims->length();
1404 LIRItemList* items = new LIRItemList(i, i, nullptr);
1405 while (i-- > 0) {
1406 LIRItem* size = new LIRItem(dims->at(i), this);
1407 items->at_put(i, size);
1408 }
1409
1410 // Evaluate state_for early since it may emit code.
1411 CodeEmitInfo* patching_info = nullptr;
1412 if (!x->klass()->is_loaded() || PatchALot) {
1413 patching_info = state_for(x, x->state_before());
1414
1415 // Cannot re-use same xhandlers for multiple CodeEmitInfos, so
1416 // clone all handlers (NOTE: Usually this is handled transparently
1417 // by the CodeEmitInfo cloning logic in CodeStub constructors but
1418 // is done explicitly here because a stub isn't being used).
1419 x->set_exception_handlers(new XHandlers(x->exception_handlers()));
1420 }
1421 CodeEmitInfo* info = state_for(x, x->state());
1422
1423 i = dims->length();
1424 while (i-- > 0) {
1425 LIRItem* size = items->at(i);
1426 size->load_nonconstant();
1427
1428 store_stack_parameter(size->result(), in_ByteSize(i*4));
1429 }
1430
1431 LIR_Opr klass_reg = FrameMap::rax_metadata_opr;
1432 klass2reg_with_patching(klass_reg, x->klass(), patching_info);
1433
1434 LIR_Opr rank = FrameMap::rbx_opr;
1435 __ move(LIR_OprFact::intConst(x->rank()), rank);
1436 LIR_Opr varargs = FrameMap::rcx_opr;
1437 __ move(FrameMap::rsp_opr, varargs);
1438 LIR_OprList* args = new LIR_OprList(3);
1439 args->append(klass_reg);
1440 args->append(rank);
1441 args->append(varargs);
1442 LIR_Opr reg = result_register_for(x->type());
1443 __ call_runtime(Runtime1::entry_for(C1StubId::new_multi_array_id),
1444 LIR_OprFact::illegalOpr,
1445 reg, args, info);
1446
1447 LIR_Opr result = rlock_result(x);
1448 __ move(reg, result);
1449 }
1450
1451
1452 void LIRGenerator::do_BlockBegin(BlockBegin* x) {
1453 // nothing to do for now
1454 }
1455
1456
1457 void LIRGenerator::do_CheckCast(CheckCast* x) {
1458 LIRItem obj(x->obj(), this);
1459
1460 CodeEmitInfo* patching_info = nullptr;
1461 if (!x->klass()->is_loaded() || (PatchALot && !x->is_incompatible_class_change_check() && !x->is_invokespecial_receiver_check())) {
1462 // must do this before locking the destination register as an oop register,
1463 // and before the obj is loaded (the latter is for deoptimization)
1464 patching_info = state_for(x, x->state_before());
1465 }
1466 obj.load_item();
1467
1468 // info for exceptions
1469 CodeEmitInfo* info_for_exception =
1470 (x->needs_exception_state() ? state_for(x) :
1471 state_for(x, x->state_before(), true /*ignore_xhandler*/));
1472
1473 CodeStub* stub;
1474 if (x->is_incompatible_class_change_check()) {
1475 assert(patching_info == nullptr, "can't patch this");
1476 stub = new SimpleExceptionStub(C1StubId::throw_incompatible_class_change_error_id, LIR_OprFact::illegalOpr, info_for_exception);
1477 } else if (x->is_invokespecial_receiver_check()) {
1478 assert(patching_info == nullptr, "can't patch this");
1479 stub = new DeoptimizeStub(info_for_exception, Deoptimization::Reason_class_check, Deoptimization::Action_none);
1480 } else {
1481 stub = new SimpleExceptionStub(C1StubId::throw_class_cast_exception_id, obj.result(), info_for_exception);
1482 }
1483 LIR_Opr reg = rlock_result(x);
1484 LIR_Opr tmp3 = LIR_OprFact::illegalOpr;
1485 if (!x->klass()->is_loaded() || UseCompressedClassPointers) {
1486 tmp3 = new_register(objectType);
1487 }
1488 __ checkcast(reg, obj.result(), x->klass(),
1489 new_register(objectType), new_register(objectType), tmp3,
1490 x->direct_compare(), info_for_exception, patching_info, stub,
1491 x->profiled_method(), x->profiled_bci());
1492 }
1493
1494
1495 void LIRGenerator::do_InstanceOf(InstanceOf* x) {
1496 LIRItem obj(x->obj(), this);
1497
1498 // result and test object may not be in same register
1499 LIR_Opr reg = rlock_result(x);
1500 CodeEmitInfo* patching_info = nullptr;
1501 if ((!x->klass()->is_loaded() || PatchALot)) {
1502 // must do this before locking the destination register as an oop register
1503 patching_info = state_for(x, x->state_before());
1504 }
1505 obj.load_item();
1506 LIR_Opr tmp3 = LIR_OprFact::illegalOpr;
1507 if (!x->klass()->is_loaded() || UseCompressedClassPointers) {
1508 tmp3 = new_register(objectType);
1509 }
1510 __ instanceof(reg, obj.result(), x->klass(),
1511 new_register(objectType), new_register(objectType), tmp3,
1512 x->direct_compare(), patching_info, x->profiled_method(), x->profiled_bci());
1513 }
1514
1515
1516 void LIRGenerator::do_If(If* x) {
1517 assert(x->number_of_sux() == 2, "inconsistency");
1518 ValueTag tag = x->x()->type()->tag();
1519 bool is_safepoint = x->is_safepoint();
1520
1521 If::Condition cond = x->cond();
1522
1523 LIRItem xitem(x->x(), this);
1524 LIRItem yitem(x->y(), this);
1525 LIRItem* xin = &xitem;
1526 LIRItem* yin = &yitem;
1527
1528 if (tag == longTag) {
1529 // for longs, only conditions "eql", "neq", "lss", "geq" are valid;
1530 // mirror for other conditions
1531 if (cond == If::gtr || cond == If::leq) {
1532 cond = Instruction::mirror(cond);
1533 xin = &yitem;
1534 yin = &xitem;
1535 }
1536 xin->set_destroys_register();
1537 }
1538 xin->load_item();
1539 if (tag == longTag && yin->is_constant() && yin->get_jlong_constant() == 0 && (cond == If::eql || cond == If::neq)) {
1540 // inline long zero
1541 yin->dont_load_item();
1542 } else if (tag == longTag || tag == floatTag || tag == doubleTag) {
1543 // longs cannot handle constants at right side
1544 yin->load_item();
1545 } else {
1546 yin->dont_load_item();
1547 }
1548
1549 LIR_Opr left = xin->result();
1550 LIR_Opr right = yin->result();
1551
1552 set_no_result(x);
1553
1554 // add safepoint before generating condition code so it can be recomputed
1555 if (x->is_safepoint()) {
1556 // increment backedge counter if needed
1557 increment_backedge_counter_conditionally(lir_cond(cond), left, right, state_for(x, x->state_before()),
1558 x->tsux()->bci(), x->fsux()->bci(), x->profiled_bci());
1559 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before()));
1560 }
1561
1562 __ cmp(lir_cond(cond), left, right);
1563 // Generate branch profiling. Profiling code doesn't kill flags.
1564 profile_branch(x, cond);
1565 move_to_phi(x->state());
1566 if (x->x()->type()->is_float_kind()) {
1567 __ branch(lir_cond(cond), x->tsux(), x->usux());
1568 } else {
1569 __ branch(lir_cond(cond), x->tsux());
1570 }
1571 assert(x->default_sux() == x->fsux(), "wrong destination above");
1572 __ jump(x->default_sux());
1573 }
1574
1575
1576 LIR_Opr LIRGenerator::getThreadPointer() {
1577 #ifdef _LP64
1578 return FrameMap::as_pointer_opr(r15_thread);
1579 #else
1580 LIR_Opr result = new_register(T_INT);
1581 __ get_thread(result);
1582 return result;
1583 #endif //
1584 }
1585
1586 void LIRGenerator::trace_block_entry(BlockBegin* block) {
1587 store_stack_parameter(LIR_OprFact::intConst(block->block_id()), in_ByteSize(0));
1588 LIR_OprList* args = new LIR_OprList();
1589 address func = CAST_FROM_FN_PTR(address, Runtime1::trace_block_entry);
1590 __ call_runtime_leaf(func, LIR_OprFact::illegalOpr, LIR_OprFact::illegalOpr, args);
1591 }
1592
1593
1594 void LIRGenerator::volatile_field_store(LIR_Opr value, LIR_Address* address,
1595 CodeEmitInfo* info) {
1596 if (address->type() == T_LONG) {
1597 address = new LIR_Address(address->base(),
1598 address->index(), address->scale(),
1599 address->disp(), T_DOUBLE);
1600 // Transfer the value atomically by using FP moves. This means
1601 // the value has to be moved between CPU and FPU registers. It
1602 // always has to be moved through spill slot since there's no
1603 // quick way to pack the value into an SSE register.
1604 LIR_Opr temp_double = new_register(T_DOUBLE);
1605 LIR_Opr spill = new_register(T_LONG);
1606 set_vreg_flag(spill, must_start_in_memory);
1607 __ move(value, spill);
1608 __ volatile_move(spill, temp_double, T_LONG);
1609 __ volatile_move(temp_double, LIR_OprFact::address(address), T_LONG, info);
1610 } else {
1611 __ store(value, address, info);
1612 }
1613 }
1614
1615 void LIRGenerator::volatile_field_load(LIR_Address* address, LIR_Opr result,
1616 CodeEmitInfo* info) {
1617 if (address->type() == T_LONG) {
1618 address = new LIR_Address(address->base(),
1619 address->index(), address->scale(),
1620 address->disp(), T_DOUBLE);
1621 // Transfer the value atomically by using FP moves. This means
1622 // the value has to be moved between CPU and FPU registers. In
1623 // SSE0 and SSE1 mode it has to be moved through spill slot but in
1624 // SSE2+ mode it can be moved directly.
1625 LIR_Opr temp_double = new_register(T_DOUBLE);
1626 __ volatile_move(LIR_OprFact::address(address), temp_double, T_LONG, info);
1627 __ volatile_move(temp_double, result, T_LONG);
1628 #ifndef _LP64
1629 if (UseSSE < 2) {
1630 // no spill slot needed in SSE2 mode because xmm->cpu register move is possible
1631 set_vreg_flag(result, must_start_in_memory);
1632 }
1633 #endif // !LP64
1634 } else {
1635 __ load(address, result, info);
1636 }
1637 }